JP7099890B2 - Pump selection device, pump selection system, and pump selection method - Google Patents

Description

The present invention relates to a pump selection device that selects a pump that meets the requirements such as a transfer liquid, a total head, and a discharge flow rate requested by a delivery destination, and a pump selection system including the pump selection device. Further, the present invention relates to a pump selection method for selecting a pump that meets the requirements such as the carrier liquid, the total head, and the discharge flow rate requested by the delivery destination.

Performance curves are used when selecting pumps that meet the requirements of the customer. The performance curve is a graph showing the pump performance which is the interrelationship between the discharge flow rate (Q), the total head (H) and the shaft power (L) of the pump.

In mass-produced general-purpose pumps, representative performance curves and pump selection diagrams showing the standard pump performance of pumps of the same model and specifications are disclosed in product catalogs as performance curves for pumps that use fresh water as the handling liquid. .. In addition, if certain conditions are met, some of the pumps that handle fresh water use special liquids other than fresh water (for example, machine coolant, cooling tower antifreeze, floor heating circulation liquid, etc.). can.

FIG. 19 is a diagram showing an example of the performance curve of the pump. In the upper graph of FIG. 19, the vertical axis represents the total head or pump efficiency, and the horizontal axis represents the discharge flow rate. In the lower graph of FIG. 19, the vertical axis represents the axial power and the horizontal axis represents the discharge flow rate. The performance curve of the pump as shown in FIG. 19 is created based on the performance test of the pump performed in the factory of the pump manufacturer or the like. As an example, the performance test of the pump is performed based on the test method of JISB8301 specified in the Japanese Industrial Standards. The pump performance curve is created as a curve connecting the total heads at each discharge flow rate (see the upper graph of FIG. 19) and a curve connecting the axial powers at each discharge flow rate (see the lower graph of FIG. 19). Will be done. In the present specification, for convenience of explanation, a curve connecting the total heads at each discharge flow rate may be referred to as a QH curve, and a curve connecting axial powers at each discharge flow rate may be referred to as a QL curve. .. As shown in the upper graph of FIG. 19, the performance curve may include a curve connecting the pump efficiencies of the standard pump at each discharge flow rate.

Further, in order to easily select a pump exhibiting desired performance from a plurality of models, a pump selection diagram created based on the performance curve of each pump may be created in advance. The pump selection diagram is created based on the performance curve when the transport liquid is fresh water, and is disclosed in the product catalog or the like.

FIG. 20 is a diagram showing an example of a pump selection diagram. In FIG. 20, the vertical axis represents the total head and the horizontal axis represents the discharge flow rate. The pump selection diagram is a diagram created based on the performance curve as shown in FIG. 19, and one performance curve of a plurality of models of pumps having the same pump type and shape but different pump sizes. It is a figure shown as a chart. More specifically, as shown in FIG. 20, the pump selection diagram shows the range of total head and discharge flow rate that can be appropriately used for each model. This performance range is created based on the performance curve for each model. For example, the performance range xRx'shown in FIG. 20 indicates the range of the total head and the discharge flow rate that can be selected by the pump xP1 using fresh water as the transport liquid.

A pump that meets the total head and discharge flow rate required by the delivery destination may be selected using the pump selection diagram as shown in FIG. For example, when the operating point required by the delivery destination is the operating point xOPa, the operating point xOPa exists within the performance range xRx', so that the pump xP1 having the performance range xRx'is selected as an appropriate pump. To. When the operating point required by the delivery destination is the operating point xOPb, this operating point xOPb exists within the performance range xRx'', so that the pump xP2 having the performance range xRx'' is selected as an appropriate pump. To. In this way, by using the pump selection diagram, it is possible to select an appropriate pump that satisfies the operating point requirements of the delivery destination. In addition, the operator can confirm the pump efficiency and the shaft power at a predetermined operating point (that is, a desired total head and discharge flow rate) by referring to the performance curve of the selected pump.

Japanese Unexamined Patent Publication No. 2017-57725

In general, the performance curve when pumping a special liquid is different from the performance curve when pumping fresh water. For example, when a special liquid having a viscosity and / or a specific gravity higher than that of fresh water is pumped, the total head of the special liquid at each discharge flow rate is lower than that of pumping fresh water. Further, the shaft power when the special liquid is pumped is larger than the shaft power when the fresh water is pumped. Therefore, the operator cannot use the performance curve for fresh water and the pump selection diagram when the transport liquid is a special liquid.

Therefore, the worker who selects the pump that pumps the special liquid has the required operating point based on the performance curve for fresh water and the viscosity and specific density of the special liquid in order to find a pump that meets the requirements desired by the customer. Check the efficiency and shaft power in. Generally, the operator repeats this confirmation operation for the performance curves of a plurality of models until the customer finds the desired pump. As described above, when the transport liquid is a special liquid, the burden on the operator is greater than when the transport liquid is fresh water. Therefore, when the conveyed liquid is a liquid that can be pumped by a pump, a device and a method capable of automatically selecting an appropriate pump from among a plurality of types of pumps are desired.

The present invention has been made in view of the above-mentioned conventional problems, and provides a pump selection device capable of selecting a pump capable of pumping a transfer liquid at a predetermined operating point, and a pump selection system including the pump selection device. The purpose is to do. Further, it is an object of the present invention to provide a pump selection method capable of selecting a pump capable of pumping a transport liquid designated by a customer at a predetermined operating point.

One aspect of the present invention for solving the above-mentioned problems is a pump selection device for selecting a pump capable of pumping a transport liquid at a predetermined operating point, wherein the operating point and the viscosity and specific gravity of the transport liquid are used. The pump is a standard pump having a storage unit for inputting transport liquid information including the above, a storage unit for storing various information, and a processing unit for processing the various information, and the handling liquid is fresh water. ,
The various information includes at least one performance information of the standard pump, the transport liquid is a special liquid having a viscosity and / or a specific gravity different from that of fresh water, and the storage unit contains the performance information of the standard pump. A representative special liquid performance curve created based on the viscosity and specific gravity of the representative special liquid having the highest viscosity and specific gravity within a predetermined viscosity specific gravity range is stored, and the processing unit is input to the input unit. If the viscosity and specific gravity of the transport liquid are outside the viscosity specific gravity range, a pump capable of pumping the transport liquid at the operating point is selected based on the performance information of the standard pump and the transport liquid information. If the viscosity and specific gravity of the conveyed liquid input to the input unit are within the viscosity specific gravity range, a pump capable of pumping the conveyed liquid at the operating point is selected based on the representative special liquid performance curve. It is a pump selection device.

In a preferred embodiment of the present invention, the storage unit stores, as performance information of the standard pump, a special liquid performance curve showing the performance of the standard pump when the transport liquid is the special liquid, and the processing unit stores the special liquid performance curve. It is characterized in that a pump capable of pumping the special liquid at the operating point is selected based on the special liquid performance curve and the conveyed liquid information.
In a preferred embodiment of the present invention, the storage unit stores a standard performance curve showing the performance of the standard pump when the transport liquid is fresh water, and the processing unit stores the standard performance curve and the special liquid. It is characterized in that the special liquid performance curve is calculated based on the viscosity and the specific gravity.

In a preferred embodiment of the present invention, the storage unit stores a special liquid pump selection diagram, which is a selection diagram when the transport liquid is the special liquid, as performance information of the standard pump, and the processing unit is the processing unit. It is characterized in that a pump capable of pumping the special liquid at the operating point is selected based on the special liquid pump selection diagram and the conveyed liquid information.
In a preferred embodiment of the present invention, the storage unit stores the special liquid performance curve when the transport liquid is the special liquid, and the processing unit uses the standard pump based on the special liquid performance curve. It is characterized by calculating a special liquid pump selection diagram showing the performance range in which special liquid can be pumped .

A preferred embodiment of the present invention is characterized in that the representative special liquid is the liquid having the highest viscosity and specific gravity in the range in which the accumulated viscosity and specific density are concentrated within a predetermined time interval.
A preferred embodiment of the present invention is characterized in that the special liquid pump selection diagram shows the performance of changing the outer diameter of the impeller as an auxiliary special liquid performance curve.
A preferred embodiment of the present invention is characterized in that the lowest performance curve among the performance curves obtained in the performance tests performed on a plurality of standard pumps is used as the performance of the standard pump.
A preferred embodiment of the present invention further comprises an image display, wherein the processing unit displays performance information of the standard pump on the image display.

Another aspect of the present invention is a pump selection system that selects a pump capable of pumping a conveyed liquid at a predetermined operating point, and is a relay connected to the pump selection device and the pump selection device so as to be able to transmit and receive information. It is a pump selection system characterized by being equipped with a processing device.

Another aspect of the present invention is a pump selection method for selecting a pump capable of pumping a conveyed liquid at a predetermined operating point using the pump selection device , wherein the handling liquid is a standard for the pump. It is a pump, and the transport liquid is a special liquid having a viscosity and / or specific gravity different from that of fresh water, and the pump selection device has the performance information of the standard pump and the highest viscosity and specific gravity within a predetermined viscosity specific gravity range. It has a storage unit for storing a representative special liquid performance curve created based on the viscosity and specific gravity of the representative special liquid having the above, and the transport liquid information including the operating point and the viscosity and specific gravity of the transport liquid. If the viscosity and specific gravity of the transport liquid input to the input unit are out of the viscosity specific gravity range, the transport liquid information and the performance information of the pump are used. A pump capable of pumping the conveyed liquid at the operating point is selected , and if the viscosity and specific gravity of the conveyed liquid input to the input unit are within the viscosity specific gravity range, the operation is based on the representative special liquid performance curve. This is a pump selection method characterized by selecting a pump capable of pumping the conveyed liquid at a point .

According to the present invention, transport liquid information including the viscosity and specific gravity of the transport liquid is input, and a pump capable of pumping the transport liquid at a predetermined operating point is selected based on the transport liquid information and the performance information of the standard pump. To. Therefore, regardless of whether the transport liquid is fresh water or special liquid, it is possible to automatically select a pump capable of pumping the transport liquid at a predetermined operating point from among a plurality of types of pumps.

FIG. 1 is a schematic view of a pump selection device according to an embodiment. FIG. 2 is a flowchart illustrating a pump selection method according to an embodiment. FIG. 3 is a diagram showing an example of a standard performance curve. FIG. 4 is a diagram showing an example of a standard pump selection diagram. FIG. 5 is a flowchart illustrating a method of creating a special liquid performance curve according to an embodiment. FIG. 6 is a diagram showing a special liquid performance curve created according to the flowchart shown in FIG. FIG. 7 is a flowchart illustrating a first selection process according to an embodiment. FIG. 8A is a diagram showing an example of a special liquid performance curve. FIG. 8B is a diagram showing another example of the special liquid performance curve. FIG. 9 is a flowchart illustrating a method of creating a special liquid pump selection diagram according to an embodiment. FIG. 10 is a special liquid pump selection diagram created according to the flowchart shown in FIG. FIG. 11 is a flowchart illustrating a second selection process according to the embodiment. FIG. 12 is a flowchart illustrating a method of creating a representative special liquid pump selection diagram according to an embodiment. FIG. 13 is a graph showing an example of the viscosity and specific density stored in the storage area of the storage unit. FIG. 14 is a flowchart illustrating a method of selecting a pump using a representative special liquid pump selection diagram according to an embodiment. FIG. 15 is a flowchart illustrating a method of creating a special liquid pump selection diagram based on the performance curve acquired in the performance inspection. FIG. 16 is a modified example of the special liquid pump selection diagram. FIG. 17 is a schematic diagram showing a pump selection system including the pump selection device according to the embodiment. FIG. 18 is a flowchart illustrating an example of a pump selection method for selecting a pump using the pump selection system shown in FIG. FIG. 19 is a diagram showing an example of a standard performance curve. FIG. 20 is a diagram showing an example of a standard pump selection diagram.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[Example 1: Pump selection device]
FIG. 1 is a schematic view of a pump selection device according to an embodiment. The pump selection device 1 shown in FIG. 1 is a pump capable of pumping a conveyed liquid at a predetermined operating point (hereinafter referred to as “predetermined operating point OPc”) desired by the delivery destination from among a plurality of types of pumps. It is a device for selection. As used herein, the standard pump refers to a turbo pump whose handling liquid is fresh water. For standard pumps whose handling liquid is fresh water, the performance curve and pump selection diagram using fresh water as the transport liquid are disclosed in product information such as product catalogs. Here, the fresh water means tap water, industrial water, and well water, for example, those having a pH of 5.8 to 8.6, a chlorine ion concentration of 200 mg / L or less, and a free residual chlorine concentration of 1 mg / L or less.

The performance curve disclosed in the product information of the standard pump is a representative performance curve showing the standard performance of a pump of the same model and the same specifications, and the representative performance curve is referred to as a "standard performance curve". Further, in order to facilitate the selection of the pump exhibiting the desired performance, there is a pump selection diagram created based on the performance curve. This pump selection diagram is a diagram showing the performance curves of a plurality of models having the same pump type and shape but different pump sizes (pump sizes such as caliber and output) as one chart. The pump selection diagram created based on the standard performance curve when the transport liquid is fresh water is called a "standard pump selection diagram". Further, the performance curve for a special liquid whose conveyed liquid is other than fresh water is referred to as a "special liquid performance curve", and the pump selection diagram for a special liquid is referred to as a "special liquid pump selection diagram".

The pump selection device 1 shown in FIG. 1 includes transport liquid information including a predetermined operating point OPc (that is, total lift and discharge flow rate) of the pump desired by the delivery destination, a name of the transport liquid, viscosity, specific gravity, and the like. Input unit 3 for inputting performance information such as pump performance curve and pump selection diagram that can be selected by pump selection device 1, and various information including various information input to input unit 3 and calculation results in processing unit 5. It has a storage unit 4 for storing the information, a processing unit 5 for processing various information, and an image display 6 for displaying the data processed by the processing unit 5. Such a pump selection device 1 can be configured from, for example, an information terminal such as a personal computer or a tablet terminal. As an example, the input unit 3 is composed of a touch panel, a keyboard, a mouse, and the like. The input unit 3 may include a scanner capable of reading information such as a pump performance curve, or may include an input port for inputting information from an external recording medium such as a USB memory or a hard disk. .. Further, various information may be input to the input unit 3 via the network. The pump selection device 1 may share various information with another information terminal via a network such as the Internet.

The image display 6 is, for example, a display of a personal computer or a tablet terminal. The image display 6 can display various performance curves, pump selection diagrams, and the like. In addition to various performance curves and pump selection diagrams, the image display 6 can display information on the conveyed liquid including the predetermined operating point OPc and the like required by the delivery destination. It is advisable to write the predetermined operating point OPc required by the delivery destination on various performance curves, pump selection diagrams, etc., and display it on the image display 6. This makes it possible to visually recognize a pump having a performance range including a predetermined operating point OPc.

Further, it is preferable that the pump selection device 1 has a printing machine 11 capable of printing performance curves of various pumps and pump selection diagrams on a printing medium such as paper. For example, by showing the customer the special performance curve and the special liquid pump selection diagram printed from the printing machine 11 to be described later, it is possible to propose a standard pump capable of pumping the special liquid at a predetermined operating point OPc to the customer. can. It is preferable to use the printing machine 11 to print various performance curves, pump selection diagrams, and the like that describe the predetermined operating point OPc required by the delivery destination on the printing medium.

As shown in FIG. 1, the pump selection device 1 is another information terminal (for example, a server, a personal computer, or a tablet terminal) in which various information stored in the storage unit 4 is arranged outside the pump selection device 1. It may include an input / output interface 8 for transmitting to and receiving information from another information terminal. The pump selection device 1 is connected to an information terminal different from the pump selection device 1 by wire or wirelessly via the input / output interface 8. Various information input to the pump selection device 1 may be input via the input / output interface 8.

The storage unit 4 stores the values constituting the pump selection diagram and the values constituting the performance curve for each model described in the pump selection diagram as performance information. For example, the storage unit 4 stores the total head, efficiency, and axial power at each flow rate point of the performance curve as a data table, and the storage unit 4 is provided with a plurality of flow rate points at equal intervals or arbitrary intervals between the flow rates from zero to the maximum flow rate. Be done. Further, the storage unit 4 stores the value of the performance curve constituting the pump selection diagram (that is, the value of the performance curve indicating the performance range that can be selected for each model of the pump having the same shape) as a data table. Further, unless otherwise specified, each value constituting the performance curve and the pump selection diagram stored in the storage unit 4 is referred to as a performance curve and a pump selection diagram.

Next, an example of the pump selection process executed by the pump selection device 1 will be described according to the flowchart shown in FIG. FIG. 2 is a flowchart illustrating a pump selection method according to an embodiment. The pump selection method shown in FIG. 2 is executed by the processing unit 5 when the transfer liquid information including the viscosity and specific gravity of the transport liquid is input to the input unit 3 by an operator or the like of the pump selection device 1. The pump selection diagram and performance curve used when selecting a pump are calculated by the processing unit 5 or input from the input unit 3 before the pump selection method shown in the flowchart of FIG. 2 is implemented. , It may be stored in the storage unit 4.

First, in the input unit 3 of the pump selection device 1, the transfer liquid information including the predetermined operating point OPc (that is, the total head and the discharge flow rate) of the pump desired by the delivery destination, the name of the transfer liquid, the viscosity, the specific gravity, etc. is input. It is input (step S01). The input liquid information may include the type, shape, pump size (pump size such as diameter and output) and shaft power desired by the delivery destination. When the selection diagram and the standard performance curve corresponding to the types and shapes of the plurality of pumps are stored in the storage unit 4, the processing unit 5 may use the processing unit 5 to input the type and shape of the conveyed liquid information input to the input unit 3. Select the standard pump selection diagram and / or the standard performance curve that correspond to the above.

Next, it is determined whether or not the viscosity and specific gravity of the conveyed liquid input to the input unit 3 are the same as those of fresh water (step S10). If the transport liquid input to the input unit 3 is fresh water, the processing unit 5 determines that the transport liquid is fresh water (step S10: Yes), and proceeds to step S20.

In step S20, the processing unit 5 selects a standard pump capable of pumping the conveyed liquid (that is, fresh water) at a predetermined operating point OPc input to the input unit 3 based on the standard pump selection diagram or the standard performance curve. .. Specifically, the processing unit 5 reads out the standard pump selection diagram corresponding to the conveyed liquid information input from the storage unit 4, and has a performance range including a predetermined operating point OPc from the read-out standard pump selection diagram. Select a standard pump. Alternatively, the processing unit 5 may select a standard pump from the standard performance curve instead of the pump selection diagram. Specifically, in step S20, the corresponding standard performance curve is first read out. Further, the standard performance curve stored in the storage unit 4 is searched until a pump having a standard performance curve that can be used at a predetermined operating point OPc is found. When the corresponding pump is found, the processing unit 5 selects the pump as a standard pump capable of pumping the conveyed liquid at a predetermined operating point OPc. If the corresponding pump is not found in all the standard performance curves to be stored, the processing unit 5 determines that there is no standard pump that can be selected.

Next, the processing unit 5 determines the presence or absence of the selected standard pump (step S30). When there is a selected standard pump in step S20 (step S30: Yes), the processing unit 5 displays the performance information of the selected standard pump on the image display unit 6 together with the predetermined operating point OPc (step S40). ). If a standard pump capable of pumping the conveyed liquid is not found at the predetermined operating point OPc in step S20, the processing unit 5 determines that there is no standard pump that can be selected (step S30: No). In this case, the processing unit 5 displays on the image display unit 6 a display indicating that there is no suitable standard pump (step S50).

The explanation returns to step S10. In step S10, if the viscosity and / or specific gravity of the conveyed liquid input to the input unit 3 is different from that of fresh water, or if the name of the conveyed liquid is other than fresh water, the processing unit 5 of the pump selection device 1 transfers. It is determined that the liquid is a special liquid (step S10: No).

Next, the processing unit 5 of the pump selection device 1 determines whether or not the special liquid input as the transport liquid can be used in the standard pump (step S60). For some types of special liquids (for example, machine coolant, cooling tower antifreeze, floor heating circulation liquid, etc.), the shaft power when operating at the operating point OPc is within the range of use of the delivery destination. If it can be pumped with a standard pump. Further, since the pump performance changes depending on the viscosity and specific gravity of the conveyed liquid, the standard pump can handle these special liquids as long as the viscosity and specific gravity of the special liquid are within a predetermined range. Therefore, the processing unit 5 proceeds to step S70 when the liquid type, viscosity, and specific gravity of the special liquid input to the input unit 3 of the pump selection device 1 can be used in the standard pump (step S60: Yes).

Here, as the pump, in addition to the standard pump which is a mass-produced general-purpose pump, there is a dedicated pump which has been subjected to special parts and processing for dealing with a special liquid. In general, a dedicated pump for pumping a special liquid is more expensive than a standard pump due to a small amount of distribution, and it takes time to manufacture. Therefore, in step S60, the pump selection device 1 selects the standard pump with priority over the dedicated pump as much as possible. This makes it possible to provide a pump with a short delivery time and an low cost.

In step S70, in order to select a standard pump capable of pumping the special liquid at a predetermined operating point OPc, the processing unit 5 uses the special liquid performance curve and / or the special liquid pump selection diagram, which will be described in detail later, to select the input unit 3. It is determined whether or not there is a standard pump capable of pumping the conveyed liquid (that is, the special liquid) at the predetermined operating point OPc input to the above, and the process proceeds to step S30. Here, if there is a standard pump that can be pumped, "there is a selected standard pump", and if there is no standard pump that can be pumped, "there is no selected standard pump".

The description returns to step S60. When the processing unit 5 determines that the special liquid of the conveyed liquid information input to the input unit 3 cannot be used with the standard pump (step S60: No), it states that "there is no standard pump that can be selected" and "there is no selected standard pump". (Step S80), the process proceeds to step S30.

In step S60, for example, in the case of a special liquid in which a problem such as melting of the sealing material (for example, O-ring) of the standard pump occurs, or when the viscosity and specific gravity of the special liquid are outside the predetermined range, the pump performance is large. If it changes, the standard pump cannot handle this special liquid, so the processing unit 5 determines No in step S60. In the present embodiment, the timing at which the operator of the pump selection device 1 inputs the name of the special liquid to the input unit 3 is the timing at which the viscosity and specific density of the conveyed liquid are input (that is, step S01). However, the timing for inputting the name of the special liquid to the input unit 3 may be the timing immediately before step S60.

In step S30, the processing unit 5 determines the presence or absence of the selected standard pump. When there is a selected standard pump (step S30: Yes), the processing unit 5 displays the information of the selected standard pump on the image display unit 6 (step S40). If a standard pump capable of pumping the conveyed liquid at a predetermined operating point OPc is not found, the processing unit 5 determines that there is no standard pump capable of pumping at the predetermined operating point OPc (step S30: No), and is appropriate. A display indicating that there is no standard pump is displayed on the image display unit 6 (step S50). After confirming the indication that there is no suitable standard pump, the operator selects a dedicated pump that satisfies the conveyed liquid information.

FIG. 3 is a diagram showing an example of a standard performance curve. In the upper graph in FIG. 3, the vertical axis represents the total head or pump efficiency, and the horizontal axis represents the discharge flow rate. In the lower graph in FIG. 3, the vertical axis represents the axial power and the horizontal axis represents the discharge flow rate. FIG. 3 shows a performance curve showing the interrelationship between the discharge flow rate (Q) and the total head (H) of the pump, and the interrelationship between the discharge flow rate (Q) and the shaft power (L) of the pump. Such a performance curve is used in step S20 of FIG. 2 when selecting a pump that satisfies the desired performance.

The standard performance curve shown in FIG. 3 is created based on, for example, a performance test of a pump performed in a factory of a pump manufacturer or the like. As an example, the performance test of the pump is carried out based on the test method of JISB8301 specified in the Japanese Industrial Standards. The standard performance curve is created as a curve connecting the total heads at each discharge flow rate (see the upper graph in FIG. 3) and a curve connecting the axial powers at each discharge flow rate (see the lower graph in FIG. 3). The curve. In the present specification, for convenience of explanation, a curve connecting the total heads at each discharge flow rate may be referred to as a QH curve, and a curve connecting axial powers at each discharge flow rate may be referred to as a QL curve. .. As shown in the upper graph of FIG. 3, the performance curve may include a curve connecting the pump efficiencies at each discharge flow rate.

FIG. 4 is a diagram showing an example of a standard pump selection diagram. In FIG. 4, the vertical axis represents the total head and the horizontal axis represents the discharge flow rate. The standard pump selection diagram is a diagram created based on the standard performance curve as shown in FIG. 3, and is a chart showing the performance curves of a plurality of models having the same pump type and shape but different pump sizes. It is a figure which shows as. More specifically, the pump selection diagram shows the performance range of total head and flow rate that can be appropriately used for each model. The performance range as shown in FIG. 4 is created based on the standard performance curve for each model. For example, the performance range Rx'shown in FIG. 4 indicates the range of the total head and the discharge flow rate that can be selected by the standard pump P1 using fresh water as the transport liquid.

Here, a method of selecting a pump in step S20 of FIG. 2 will be described with reference to FIG. First, when the operating point OPc input to the input unit 3 in step S01 is the operating point OPa, the operating point OPa exists within the performance range Rx', so that the processing unit 5 has the performance range Rx'. Select the standard pump P1 as the appropriate pump. When the operating point OPc is the operating point OPb, the processing unit 5 selects the standard pump P2 having the operating point Rx'' as an appropriate pump because the operating point OPb exists within the performance range Rx''. .. As described above, by using the pump selection diagram, the processing unit 5 can easily select an appropriate pump that satisfies the condition of the predetermined operating point OPc requested by the delivery destination. Further, the processing unit 5 refers to the standard performance curve of the pump selected by using the pump selection diagram, and determines the pump efficiency and shaft power at a predetermined operating point OPc (that is, a desired total head and discharge flow rate). You may check.

Next, with reference to FIGS. 5 to 16, a method of creating a performance curve and a pump selection diagram when the conveyed liquid is a special liquid, and a method of selecting a pump will be described in detail.

First, a method of creating a special liquid performance curve will be described with reference to FIGS. 5 and 6. FIG. 5 is a flowchart illustrating a method of creating a special liquid performance curve according to an embodiment. FIG. 6 is a diagram showing a special liquid performance curve created according to the flowchart shown in FIG. In the upper graph of FIG. 6, the vertical axis represents the total head or pump efficiency, and the horizontal axis represents the discharge flow rate. In the lower graph of FIG. 6, the vertical axis represents the axial power and the horizontal axis represents the discharge flow rate. The steps shown in the flowchart of FIG. 5 are executed by the processing unit 5 when selecting a pump using the special liquid performance curve or at an arbitrary timing. In FIG. 6, the standard performance curve is drawn by a dotted line, and the special liquid performance curve calculated from the standard performance curve is drawn by a solid line.

As shown in FIG. 5, first, the processing unit 5 resets the value of the counter CN by setting the value of the counter CN that counts the number of operations to 0 (step S100). Then, the processing unit 5 adds 1 to the value of the counter CN (step S102). The value of the counter CN corresponds to each of the flow rate points (Q1 to Q5 in FIG. 6) for calculating the pump performance in the special liquid, and the maximum value CNmax of the counter CN corresponds to the number of flow points for calculating the pump performance in the special liquid. handle.

Next, the processing unit 5 calculates the total head H of the special liquid at each flow rate point corresponding to the value of the counter CN, the pump efficiency η, and the shaft power L based on the conveyed liquid information input in step S01. (Step S104). For example, the processing unit 5 uses the calculation method described in ISO / TR 17766 (Centrifugal pumps handling viscous liquids --Performance corrections) based on the viscosity specific gravity input in step S01 to obtain the total head H of the special liquid. The pump efficiency η of the special liquid and the shaft power L of the motor are calculated. Specifically, the processing unit 5 performs the calculation described in ISO / TR 17766 based on the standard performance curve and the viscosity and specific density of the special liquid, and each flow rate point QCN (CN corresponds to the value of the counter CN). ), The total head H1CN of the special liquid is calculated from the total head H0CN of fresh water. Similarly, the shaft power L1CN is calculated from the shaft power L0CN of the fresh water at each flow rate point QCN, and the pump efficiency η1CN of the special liquid is calculated from the pump efficiency η0CN of the fresh water.

Next, the processing unit 5 confirms the value of the counter CN (step S106). When the value of the counter CN is less than the maximum value CNmax (step S106: No), the processing unit 5 returns to step S102 and adds 1 to the value of the counter CN, and the total head H1CN of the special liquid at the next flow rate point is special. The liquid pump efficiency η1CN and the motor shaft power L1CN are calculated (step S104).

When the value of the counter CN has reached the maximum value CNmax (step S106: Yes), the processing unit 5 determines that the performance at each flow rate point required for creating the special liquid performance curve has been calculated, and is special. A liquid performance curve is created (step S108). Here, in the example shown in FIGS. 5 and 6, the maximum value CNmax of the counter CN is 5. That is, at the five flow rate points Q1, Q2, Q3, Q4, and Q5, the total head H (H11, H12, H13, H14, H15) of the special liquid, and the shaft power L (L11, L12, L13, of the special liquid) of the special liquid. L14, L15), the pump efficiency η (η11, η12, η13, η14, η15) of the special liquid is calculated. Q1 to Q5 may include a flow rate point at a rated operating point in fresh water. Then, in step S108, the processing unit 5 connects the calculated values from the flow rate 0 with a straight line to complement the values between the flow rate points, thereby completing the special liquid performance curve. The maximum value CNmax may be changed according to the processing capacity of the processing unit 5 and the capacity of the storage unit 4. Further, the process of step S108 may be performed only in the flow rate range in which the predetermined operating point OPc is actually included when the predetermined operating point OPc is input in step S01 of FIG. Further, by setting the number of flow rate points for calculating the pump performance for the special liquid (that is, the maximum value CNmax) to a large value, the value complementing process between the flow rate points performed in step S108 may be omitted. good.

Next, with reference to FIGS. 7, 8A and 8B, a method of selecting a standard pump corresponding to step S70 of FIG. 2 using a special liquid performance curve will be described. Here, as an example of the selection process in step S70 of FIG. 2, the first selection process of selecting the pump using the special liquid performance curve will be described.

FIG. 7 is a flowchart illustrating a first selection process according to an embodiment. 8A and 8B are diagrams showing examples of special liquid performance curves, respectively. In the upper graphs of FIGS. 8A and 8B, the vertical axis represents the total head and the horizontal axis represents the discharge flow rate. In the lower graphs of FIGS. 8A and 8B, the vertical axis represents the axial power and the horizontal axis represents the discharge flow rate. 8A and 8B show the special liquid performance curves of different types of pumps when the same special liquid is used as the handling liquid.

In the pump, the predetermined operating point OPc (that is, the total lift and the discharge flow rate) is located below the QH curve of the special liquid performance curve, and the axial power at the predetermined operating point OPc is the Q- of the special liquid performance curve. If it is within the range of use of the L curve (minimum shaft power Lmin to maximum shaft power Lmax), it can be used at the operating point OPc. That is, when the predetermined operating point OPc is located below the QH curve of the special liquid performance curve, and the axial power at the predetermined operating point OPc is within the range of use of the QL curve of the special liquid performance curve. , It can be determined that the predetermined operating point OPc is within the range of use of the pump. The range of use in shaft power is, for example, a range in which a pump determined based on the type, model, transfer liquid, pump performance, shape, etc. of the pump can be normally used. The minimum shaft power Lmin of the standard pump when the special liquid is used as the transport liquid is, for example, the shaft power Lmin1 at a flow rate of about 70% of the maximum efficiency ηmax when fresh water is used as the transport liquid. The maximum shaft power Lmax of the standard pump when the special liquid is used as the transport liquid is, for example, the shaft power Lmax1 at a flow rate of about 110% of the maximum efficiency ηmax when fresh water is used as the transport liquid. Further, as one embodiment, the shaft power minimum value Lmin and the shaft power maximum value Lmax may be the shaft power minimum value Lmin2 and the maximum value Lmax2 input as the conveyed liquid information and desired by the customer. Further, the shaft power Lmin1 and the shaft power Lmin2 may be compared, and the larger one may be the shaft power minimum value Lmin, or the shaft power Lmax1 and the shaft power Lmax2 may be compared, and the smaller one may be the shaft power maximum value Lmax. May be.

The first selection process shown in FIG. 7 is executed in step S70 of FIG. Prior to step S110 in FIG. 7, the processing unit 5 selects a model having a predetermined operating point OPc within the usage range or a model having an output close to the model as model 1 in the standard pump selection diagram, and selects the model 1 of the model 1. It is assumed that the special liquid performance curve has been created in advance.

The processing unit 5 determines whether or not the predetermined operating point OPc is within the usage range in the special liquid performance curve of the model 1 (step S110). More specifically, in the processing unit 5, the predetermined operating point OPc designated by the customer is located below the QH curve of the special liquid performance curve of the model 1, and the axis at the predetermined operating point OPc. It is determined whether or not the power is within the range of use in the QL curve of the special liquid performance curve of the model 1. In step S110, in the standard pump P1 having the special liquid performance curve shown in FIG. 8A, the predetermined operating point OPc is located below the QH curve of the special liquid performance curve of model 1 (upper part of FIG. 8A). (See graph), but the shaft power Lc1 at the predetermined operating point OPc exceeds the maximum shaft power Lmax in the QL curve of the special liquid performance curve (see the lower graph in FIG. 8A). Therefore, the standard pump P1 cannot be used as a pump for pumping a special liquid at a predetermined operating point OPc (step S110: No). On the other hand, in the standard pump P2 having the special liquid performance curve shown in FIG. 8B, the predetermined operating point OPc is located below the QH curve of the special liquid performance curve of model 1, and the predetermined operating point OPc is located. Since the shaft power Lc2 in the above range is within the range of use in the QL curve of the special liquid performance curve (that is, the shaft power Lc2 is within the range of the minimum value Lmin to the maximum value Lmax of the shaft power), the special liquid is pumped at a predetermined operating point OPc. It can be used as a pump for pumping. Therefore, when the predetermined operating point OPc described in the special liquid performance curve is within the usage range (step S110: Yes) as in the standard pump P2 shown in FIG. 8B, the processing unit 5 selects the standard pump P2. It is determined that there is a pump that can be selected (step S170). This step S170 corresponds to the step in which "YES" is selected in step S30 of FIG. After that, the processing unit 5 ends the first selection process shown in FIG. 7, and proceeds to step S40 in FIG.

In step S110, when the predetermined operating point OPc described in the special liquid performance curve is out of the range of use (step S110: No) as in the standard pump P1 shown in FIG. It is determined whether or not there is a model, that is, whether or not the standard performance curves of all the models stored in the storage unit 4 have been confirmed (step S120). Specifically, the model with the smallest output among all the models stored in the storage unit 4 in the previous step S140 (described later) was selected, or in the previous step S160 (described later) in the storage unit 4. When the model with the maximum output is selected from all the stored models, the processing unit 5 determines that all the models stored in the storage unit 4 are out of the usable range (step S120: Yes). Then, it is determined that there is no standard pump that can be selected (step S180). This step S180 corresponds to the step in which "NO" is selected in step S30 of FIG. After that, the processing unit 5 ends the first selection process shown in FIG. 7, and proceeds to step S50 in FIG.

When the processing unit 5 determines in step S120 that there is a model to be confirmed next among the standard performance curves stored in the storage unit 4 (step S120: No), the processing unit 5 proceeds to step S130. In the process of step S130, for example, if the predetermined operating point OPc is the point of OPc shown in FIG. 8A, the predetermined operating point OPc is located below the QH curve of the model 1 (step S130: Yes). Therefore, the processing unit 5 selects a standard performance curve of a model having an output smaller than that of the model 1 from the standard performance curves stored in the storage unit 4 (step S140), and the special liquid performance is based on the selected standard performance curve. Create a curve (step S150). Further, in the process of step S130, when it is determined that the predetermined operating point OPc is located above the QH curve of the model 1 (S130: No), the process unit 5 is the standard stored in the storage unit 4. A standard performance curve of a model having an output larger than that of model 1 is selected from the performance curves (step S160), and a special liquid performance curve is created based on the selected standard performance curve (step S150). In step S150, the processing unit 5 creates a special liquid performance curve according to the flowchart shown in FIG. 5 described above. Then, after creating the special liquid performance curve in step S150, the process returns to step S110, and the processing unit 5 determines whether the predetermined operating point OPc is within the range of use in the special liquid performance curve created in step S150. Judge whether or not.

In this way, in the first selection process, the processing unit 5 repeats the work of confirming the special liquid performance curve until a standard pump capable of pumping the special liquid at a predetermined operating point OPc is found. When a special liquid performance curve capable of pumping a special liquid at a predetermined operating point OPc is found, the processing unit 5 uses a standard pump of this special liquid performance curve to pump a transport liquid at a predetermined operating point OPc. Select as a pump. If the special liquid performance curve confirmed in step S110 is already stored in the storage unit 4, the process of step S150 can be omitted. Further, by storing the created special liquid performance curve in the storage unit 4, the processing in step S150 can be omitted and the processing speed can be increased.

In this embodiment, in steps S130 to S160, the processing unit 5 has the standard performance of a model having an output smaller than that of the model 1 when the predetermined operating point OPc is located below the QH curve of the model 1. A curve was selected, and when the predetermined operating point OPc was located above the QH curve of model 1, the standard performance curve of the model with an output larger than that of model 1 was selected. Regardless of whether the operating point OPc is located below or above the QH curve of the model 1, check whether the predetermined operating point OPc is out of the usage range in all the standard performance curves stored in the storage unit 4. May be good. This is because, for example, in the model 1 in which the operating point OPc is located below the QH curve, even if the shaft power at the operating point OPc exceeds the desired shaft power of the delivery destination, the output of the model 2 having a larger output than that of the model 1 This is because the shaft power at the operating point OPc of the model 2 may be within the range of the shaft power desired by the delivery destination because the pump efficiency at the operating point OPc is better.

In addition, the range of use for each model may overlap with each other, and it may be possible to pump a special liquid at the operating point OPc in the standard pumps of a plurality of models. Therefore, even after the processing unit 5 finds a standard pump capable of pumping the special liquid at the predetermined operating point OPc, whether or not the predetermined operating point OPc is out of the range of use in all the standard performance curves stored in the storage unit 4. You may check if. If the operator of the pump selection device 1 presents a plurality of models to the delivery destination, the most suitable pump can be selected from the presented pumps at the delivery destination.

Next, a special liquid pump selection diagram will be described. FIG. 9 is a flowchart illustrating a method of creating a special liquid pump selection diagram according to an embodiment. FIG. 10 shows a special liquid pump selection diagram created according to the flowchart shown in FIG. In FIG. 10, the vertical axis represents the total head and the horizontal axis represents the discharge flow rate. The method of creating the special liquid pump selection diagram shown in the flowchart of FIG. 9 is executed by the processing unit 5 at the time of selecting the standard pump in step S70 of FIG. 2 or at an arbitrary timing. The special liquid pump selection diagram is based on the storage unit 4 that stores the transfer liquid information and the performance information of at least one standard pump, and the standard pump performance information and the transfer liquid information stored in the storage unit 4. It is calculated by a pump selection drawing creating device (in this embodiment, the pump selection device 1) provided with a processing unit 5 for calculating a special liquid pump selection drawing.

In step S210 of FIG. 9, the processing unit 5 creates a standard performance curve and a special liquid performance curve based on the viscosity and specific density of the special liquid. In step S210, the processing unit 5 creates a special liquid performance curve according to the flowchart shown in FIG. 5 described above. Here, when the special liquid performance curve is stored in the storage unit 4, the process of step S210 may be omitted. Next, the processing unit 5 confirms whether or not the special liquid performance curves of all the models used in the special liquid pump selection diagram have been created (step S220). As described above, the pump selection diagram is a diagram showing the performance curves of a plurality of models of pumps having the same pump type and shape but different pump sizes as one chart. Therefore, in step S220, the processing unit 5 confirms whether or not the special liquid performance curve necessary for creating the special liquid performance curve is stored in the storage unit 4.

When the special liquid performance curve required to create the special liquid pump selection diagram is stored in the storage unit 4 (step S220: Yes), the special liquid pump selection diagram is based on the usage range of each special liquid performance curve. Is created (step S230). When the special liquid performance curve required for creating the special liquid pump selection diagram is not stored in the storage unit 4 (step S220: No), the processing unit 5 selects the next standard performance curve (step S240). ), A special liquid performance curve is created from the standard performance curve (step S210). Then, the processing unit 5 extracts the usable QH range of the special liquid performance curve, and shows the extracted QH range of a plurality of models in one chart, as shown in FIG. Create a special liquid pump selection diagram (step S230).

The performance range Rx shown in FIG. 10 is the range surrounded by the QH curve Y1, the QH curve Y2, the start line STA, and the end line END corresponding to the usage range (range of axial power Lmin to Lmax). be. In step S210, the processing unit 5 calculates a special liquid performance curve for all or some of the models shown in the standard pump selection diagram, and further determines the performance range Rx based on the performance range that can be used in fresh water. decide. Specifically, as an example, the special liquid performance range Rx uses a special liquid performance curve in a flow rate range that is the same as or narrower than the flow rate range that can be used in fresh water (however, including the maximum efficiency point). .. The reason for applying the performance range Rx of the special liquid performance curve based on the performance range that can be used in fresh water is that the special liquid performance curve is obtained by calculation, so if the performance deviates from the maximum efficiency point, the calculation error will increase. be. It is advisable to create a special liquid pump selection diagram based on the performance range Rx of the special liquid determined in this way. Further, the performance range Rx for each model may have a range that overlaps with each other.

Next, with reference to FIGS. 10 and 11, as an example of the selection process in step S70 of FIG. 2, a second selection process of selecting a pump using the special liquid pump selection diagram will be described. FIG. 11 is a flowchart illustrating a second selection process according to the embodiment. In the second selection process shown in FIG. 11, the processing unit 5 selects a pump from the special liquid pump selection diagram as shown in FIG.

In the second selection process shown in FIG. 11, the processing unit 5 determines whether or not the predetermined operating point OPc input to the input unit 3 is within the usage range of any of the pumps in the special liquid pump selection diagram. (Step S310). Specifically, as shown in FIG. 10, the processing unit 5 describes the predetermined operating point OPc input to the input unit 3 in the special liquid pump selection diagram. Then, the processing unit 5 selects a pump P2 which is a model having a performance range Ry including this operating point OPc. Here, if the operating point OPc input to the input unit 3 in step S01 of FIG. 2 is the operating point OP1 shown in FIG. 10, the processing unit 5 is a model having a performance range Rx including the operating point OP1. If a certain pump P1 is selected and the operating point OPc is the operating point OP3, the processing unit 5 selects the pump P3 which is a model having a performance range Rz including the operating point OP3. As shown in FIG. 10, when the predetermined operating point OPc is within the performance range of any of the pumps in the special liquid pump selection diagram (step S310: Yes), the processing unit 5 determines that there is a pump that can be selected. (Step S320). This step S320 corresponds to the step in which "YES" is selected in step S30 of FIG. After that, the processing unit 5 ends the second selection process shown in FIG. 11 and proceeds to step S40 in FIG.

If the predetermined operating point OPc is not included in the performance range of any of the pumps in the special liquid pump selection diagram (step S310: No), the processing unit 5 determines that there is no pump that can be selected (step S330). .. This step S330 corresponds to the step in which "NO" is selected in step S30 of FIG. After that, the processing unit 5 ends the second selection process shown in FIG. 11 and proceeds to step S50 in FIG. If a plurality of special liquid pump selection diagrams can be created in the processing unit 5, or if a plurality of special liquid pump selection diagrams are stored in the storage unit 4, the processing unit 5 can be used in all the special liquid pump selection diagrams. It is preferable to determine whether or not there is a pump that can be selected, and if there is no pump that can be selected, determine No in step S310 and proceed to step S330.

According to the present embodiment, the processing unit 5 creates a special liquid performance curve based on the standard performance curve and the viscosity and specific gravity of the special liquid, and creates a special liquid pump selection diagram based on the special liquid performance curve. do. That is, the pump selection diagram creating device (pump selection device 1) includes a storage unit 4 that stores a standard performance curve and a special liquid performance curve, and a processing unit 5 that processes the various information. A special liquid pump selection diagram in which the conveyed liquid is a special liquid is calculated based on the standard performance curve and the special liquid performance curve. Since this special liquid pump selection drawing shows the performance range in which the conveyed liquid can be appropriately used in each standard pump of special liquid, the processing unit 5 can pump the special liquid from the special liquid pump selection drawing. Standard pumps can be easily selected.

As described above, the pump selection device 1 pumps the transport liquid at a predetermined operating point OPc based on the transport liquid information including the viscosity and specific gravity of the transport liquid input to the input unit 3 and the performance information of the standard pump. Select a possible pump. Therefore, by using this pump selection device 1, regardless of whether the transport liquid is fresh water or special liquid, a pump that can pump the transport liquid at a predetermined operating point is automatically selected from among a plurality of types of pumps. can do.

Here, the calculation of the special liquid performance curve and the creation of the special liquid pump selection diagram may be performed for the corresponding special liquid each time the pump selection method shown in the flowchart of FIG. 2 is executed, or may be stored. The special liquid performance curve stored in advance in the part 4 may be used. In order to store the special liquid performance curve in the storage unit 4, each value of the special liquid performance curve may be input in advance from the input unit 3 to the non-volatile memory of the storage unit 4, or the processing unit 5 may be arbitrary. At the timing, the standard performance curve (standard performance curve for all or part of each standard pump shown in the standard pump selection diagram) and the viscosity and specific gravity of the special liquid (at least one of the possible viscosity and specific gravity). A special liquid performance curve may be calculated based on the unit), and the calculated special liquid performance curve may be stored in the non-volatile memory of the storage unit 4. Further, a representative special liquid pump selection diagram, which will be described later, may be created at an arbitrary timing, and the created representative special liquid pump selection diagram may be stored in the non-volatile memory of the storage unit 4. Here, as an example of arbitrary timing, when the power supply of the pump selection device 1 is started, the timing when the standard performance curve is added or changed, and the midnight or holiday when the pump selection device 1 is rarely operated, etc. Periodic timing and the like can be mentioned. If the special liquid performance curve is calculated and the special liquid pump selection diagram is created at such timing, the processing time in step S70 of FIG. 2 can be shortened.

Further, the processing unit 5 may carry out the first selection process and the second selection process in parallel or continuously. For example, the special liquid performance curve and the special liquid pump selection diagram differ depending on the pump model and the viscosity and specific density of the special liquid. Therefore, if as many special liquid pump selection diagrams as the number of combinations of all standard pumps and special liquids are created, the memory capacity of the storage unit 4 may be insufficient. Therefore, a special liquid pump selection diagram may be created only for the special liquid that is frequently input, the pump may be selected in the second selection process, and the other special liquids may be selected in the first selection process.

According to the present embodiment described above, the pump selection device 1 has an input unit 3 for inputting transport liquid information including a predetermined operating point OPc required by the delivery destination and the viscosity and specific gravity of the transport liquid, and various information. A storage unit 4 for storing and a processing unit 5 for processing various information stored in the storage unit 4 are provided. The pump selected by the pump selection device 1 is a standard pump whose handling liquid is fresh water. Further, the various information stored in the storage unit 4 includes the performance curve of at least one standard pump and / or the performance information which is a pump selection diagram. In addition, the performance information may include at least one special liquid performance curve and / or special liquid pump selection diagram. The processing unit 5 of the pump selection device 1 is configured to select a pump capable of pumping the conveyed liquid at a predetermined operating point OPc based on the performance information and the conveyed liquid information of the standard pump.

With such a configuration, the pump selection device 1 can automatically select a standard pump capable of pumping the conveyed liquid at a predetermined operating point requested by the delivery destination from among a plurality of types of standard pumps.

The transport liquid of the standard pump selected by the pump selection device 1 (that is, the transport liquid required by the delivery destination) includes a special liquid having a viscosity and / or a specific gravity different from that of fresh water. Therefore, the pump selection device 1 can select a standard pump capable of pumping a special liquid at an operating point requested by the delivery destination from among a plurality of types of standard pumps.

The storage unit 4 stores, as the performance information of the standard pump, a special liquid performance curve showing the performance of the standard pump when the conveyed liquid is the special liquid required by the delivery destination. Then, the pump selection device 1 is requested by the delivery destination at a predetermined operating point OPc requested by the delivery destination based on the special liquid performance curve stored in the storage unit 4 and the conveyed liquid information input to the input unit 3. Select a standard pump that can pump special liquid.

The storage unit 4 stores a standard performance curve showing the performance of the standard pump when the transport liquid is fresh water. Then, the processing unit 5 calculates each value of the special liquid performance curve based on the standard performance curve stored in the storage unit 4 and the viscosity and specific density of the special liquid required by the delivery destination.

The storage unit 4 stores, as performance information of the standard pump, a special liquid pump selection diagram, which is a pump selection diagram when the conveyed liquid is a special liquid having the viscosity and specific gravity required by the delivery destination. Then, the processing unit 5 selects a standard pump capable of pumping the special liquid required by the delivery destination at a predetermined operating point OPc based on the special liquid pump selection diagram and the information on the transport liquid of the special liquid required by the delivery destination. do.

The storage unit 4 stores a special liquid performance curve when the conveyed liquid is a special liquid having the viscosity and specific gravity required by the delivery destination. Then, the processing unit 5 creates a special liquid pump selection diagram showing a performance range in which the special liquid required by the delivery destination can be pumped, based on the special liquid performance curve.

[Modification 1]
In the above-described embodiment, the special liquid performance curve differs depending on the viscosity and specific gravity of the special liquid. Therefore, the special liquid performance curve and the special liquid pump selection diagram are shown for all the special liquids that may be input to the input unit 3. If it is created, the load on the processing unit 5 becomes large and the processing speed decreases, or the memory capacity of the storage unit 4 becomes insufficient. Therefore, the processing unit 5 stores the viscosity and specific gravity of the special liquid input to the input unit 3 in the storage unit 4, and is a special liquid pump selection diagram (representative special liquid) corresponding to the viscosity and specific gravity that are often requested within a predetermined range. Pump selection diagram) may be created.

A representative special liquid pump selection diagram will be described with reference to FIGS. 12 and 13. FIG. 12 is a flowchart illustrating a method of creating a representative special liquid pump selection diagram according to an embodiment. The method shown in the flowchart of FIG. 12 is constantly executed by the processing unit 5 while the pump selection device 1 is being started. FIG. 13 is a graph showing an example of the viscosity and specific density stored in the storage area X of the storage unit 4. More specifically, FIG. 13 is a diagram showing values of viscosity and specific gravity of a plurality of special liquids stored in the storage area X of the storage unit 4 input to the input unit 3 during a predetermined period. In FIG. 13, the vertical axis represents the viscosity and the horizontal axis represents the specific gravity. The storage area X is formed in the storage unit 4 of the pump selection device 1 in a table structure (see FIG. 1).

In the flowchart of FIG. 12, first, the processing unit 5 clears the viscosity and the specific gravity of the special liquid accumulated in the storage area X (step S410). Next, the processing unit 5 stores the viscosity and specific gravity of the special liquid input to the input unit 3 in the storage area X of the storage unit 4 (step S420). Here, the storage area X has a table structure and has an area for storing the viscosities and specific densities of a plurality of special liquids. The viscosity and specific density of the special liquid are accumulated until the predetermined time interval ΔT1 (for example, several months to several years) elapses (step S430). When the predetermined time interval ΔT1 has elapsed (step S430: Yes), the processing unit 5 has a range in which the viscosity and specific density of the accumulated special liquid are concentrated (for example, the value of the viscosity and specific density of the accumulated special liquid is 80%). The range that occupies the above) is determined as the viscosity specific gravity range Z (step S440). Next, the processing unit 5 determines a special liquid having the maximum viscosity and specific gravity in the viscosity specific gravity range Z (corresponding to the special liquid designated by the reference numeral “LS” in FIG. 13) (step S450). In the present specification, the special liquid having the maximum viscosity and the specific gravity in the viscosity specific gravity range Z is referred to as a "representative special liquid". The viscosity specific gravity range Z is not limited to the one stored in the storage area X from the pump selection device 1, and the operator may specify a predetermined viscosity specific gravity range Z, and the processing unit 5 may specify the viscosity specific gravity range Z. May be calculated. Here, the performance range Rx of the special liquid within the viscosity specific gravity range Z partially overlaps with the performance range Rx of the representative special liquid.

Next, the processing unit 5 has a special liquid performance curve (hereinafter referred to as "representative special liquid performance curve") and a special liquid pump selection diagram (hereinafter referred to as "representative special liquid performance curve") based on the standard performance curve and the viscosity and specific gravity of the representative special liquid. , Referred to as a representative special liquid pump selection diagram) (step S460). Here, if the special liquid performance curve and the special liquid pump selection diagram created previously based on the viscosity and specific gravity of the representative special liquid are stored in the storage unit 4, the process of step S460 is omitted. May be good. Further, even if the special liquid performance curve and the special liquid pump selection diagram stored in the storage unit 4 other than the representative special liquid performance curve and the representative special liquid pump selection diagram are cleared to secure the memory capacity of the storage unit 4. good.

FIG. 14 is a flowchart illustrating a method of selecting a pump using a representative special liquid pump selection diagram according to an embodiment. The method shown in the flowchart of FIG. 14 is executed in step S70 of FIG. When the viscosity and specific gravity of the special liquid input to the input unit 3 are within the viscosity specific gravity range Z (step S510: Yes), the processing unit 5 selects a pump using the representative special liquid pump selection diagram (step S520). ). Specifically, the processing unit 5 carries out the above-mentioned second selection process using the representative special liquid pump selection diagram. When the viscosity and specific gravity of the special liquid input to the input unit 3 are outside the viscosity specific gravity range Z (step S510: No), the processing unit 5 selects a pump using the special liquid performance curve or the special liquid pump selection diagram. (Step S530). Specifically, the processing unit 5 creates the special liquid performance curve or the special liquid pump selection diagram, and selects the pump using the special liquid performance curve or the special liquid pump selection diagram. Carry out the selection process.

Here, in step S510, when the viscosity and specific gravity of the special liquid input to the input unit 3 are within the viscosity specific gravity range Z (step S510: Yes), the total head at each discharge flow rate of this special liquid is a representative special. It is equal to or greater than the total head at each discharge flow rate of the liquid. Further, the axial power when the special liquid whose viscosity and specific gravity are within the viscosity specific gravity range Z is pumped is equal to or less than the axial power when the representative special liquid is pumped. When selecting a pump using the pump selection diagram, specify the operating point OPc desired by the delivery destination and select the pump whose shaft power is within the range of use. Therefore, the representative special liquid pump selection diagram has viscosity and specific gravity. It can be used as a pump selection diagram for selecting a standard pump capable of pumping a special liquid within the viscosity specific gravity range Z.

When the viscosity and specific gravity of the special liquid input to the input unit 3 in step S01 of FIG. 2 are within the viscosity specific gravity range Z, the representative special liquid performance curve or the representative special liquid pump selection diagram in step S70 of FIG. Can be used to select a standard pump that can pump special liquids. Therefore, a standard pump capable of pumping a special liquid can be easily and quickly selected.

In this modification 1, the processing unit 5 creates a representative special liquid performance curve or a representative special liquid pump selection diagram specialized for the viscosity and specific gravity of the special liquid. Similarly, another special liquid pump selection diagram (that is, another) specialized for the operating point, pump model (caliber / output), pump shape, etc., which are frequently input to the input unit 3 as a request from the customer. (Representative special liquid pump selection diagram) may be created.

[Modification 2]
In the standard pumps described above, the pump manufacturer regularly (eg, for each pump production lot) performs performance inspections with fresh water. In this modification 2, the special liquid performance curve is calculated based on the performance curve PC1 acquired in the performance inspection performed periodically.

The performance curve PC1 is periodically input to the input unit 3 of the pump selection device 1 via a network or the like from a server or the like where performance inspection results by fresh water are accumulated, and the processing unit 5 stores the performance curve PC1. Make it memorize in 4. The processing unit 5 creates a special liquid performance curve and a special liquid pump selection diagram based on the performance curve PC1 stored in the storage unit 4 and the viscosity and specific gravity of the special liquid. In this case, the processing unit 5 can select the pump based on the performance curve PC1.

FIG. 15 is a flowchart illustrating a method of creating a special liquid pump selection diagram based on the performance curve PC1 acquired in the performance inspection. First, the processing unit 5 clears the storage area Y (see FIG. 1) formed in the storage unit 4 (step S610). Next, the processing unit 5 stores the performance curve PC1 in the storage area Y of the storage unit 4 (step S620). Specifically, every time a performance test is performed, or every predetermined time interval ΔT2 (for example, from one week to several months), the performance curve PC1 obtained by the performance test is input to the input unit 3 (or network). Etc.) to be input to the pump selection device 1, and the processing unit 5 stores the input performance curve PC1 in the storage area Y. The processing unit 5 stores the performance curve PC1 in the storage area Y during a predetermined time interval ΔT2 (for example, about one week to several months) (step S630: YES), and then stores the performance curve PC1 in the storage area Y. Performance curve The most suitable performance curve in PC1 is selected as the optimum performance curve (step S640).

Next, the processing unit 5 creates a special liquid performance curve based on the optimum performance curve and the viscosity and specific gravity of the special liquid, and further, a special liquid pump selection diagram (hereinafter referred to as a special liquid pump selection diagram) based on the created special liquid performance curve. (Referred to as "optimal pump selection diagram") is created (step S650). As the viscosity and specific gravity of the special liquid used here, it is preferable to use the viscosity and specific gravity of the above-mentioned representative special liquid. In step S70 of FIG. 2, the processing unit 5 has an optimum performance curve, a special liquid performance curve created based on the viscosity and specific gravity of the special liquid, or an optimum pump selection diagram created in step S650, and a predetermined operating point. The pump may be selected based on the OPc. When creating the special liquid performance curve and the optimum pump selection diagram based on the optimum performance curve and the viscosity and specific gravity of the special liquid at other timings, step S650 may be omitted, or step 650 may be omitted. , Only the special liquid performance curve may be created.

The processing unit 5 selects a standard pump capable of pumping a special liquid from the optimum pump selection diagram. This makes it possible to select a pump based on an actual performance curve, and after delivering the standard pump to a customer, the standard pump can be operated within a desired performance range.

When the viscosity and specific gravity of the representative special liquid shown in Modification 1 are larger than those of fresh water, the optimum performance curve is a performance curve showing the lowest performance among the plurality of performance curves stored in the storage area Y. You may use it. If the optimum pump selection diagram is created using the performance curve PC1 showing the lowest performance within a predetermined period, the axial power of the selected pump is within the range of use. As the optimum performance curve, a performance curve obtained by averaging a plurality of performance curves PC1 stored in the storage area Y at arbitrary flow points may be used, or among the plurality of performance curves PC1 stored in the storage area Y. , A performance curve obtained by averaging performance curves within a predetermined range may be used.

[Modification 3]
A modification of the above-mentioned special liquid performance curve and special liquid pump selection diagram will be described with reference to FIG. FIG. 16 shows a modified example of the special liquid pump selection diagram. In FIG. 16, the vertical axis represents the total head and the horizontal axis represents the discharge flow rate. In FIG. 16, as an example, two auxiliary special liquid performance curves Y3 and Y4 existing between the special liquid performance curves Y1 and Y2 that partition the performance range Rx of the standard pump P1 are drawn.

In general, changing the outer diameter of the impeller of a pump changes the performance curve. More specifically, as the outer diameter of the impeller of the pump becomes smaller, the total head with respect to the discharge flow rate becomes smaller, and the shaft power also becomes smaller. In the special liquid pump selection diagram shown in FIG. 16, the processing unit 5 calculates the QH curve when the diameter of the impeller is smaller than that of the QH curve Y1, and the special liquid auxiliary performance curve Y3. It is indicated by a dotted line as Y4.

In this way, the processing unit 5 converts the auxiliary standard performance curve described in the standard pump selection diagram into the special liquid auxiliary performance curve based on the viscosity and specific gravity of the special liquid, and converts these special liquid auxiliary performance curves into the special liquid. It may be reflected in the pump selection diagram. That is, the processing unit 5 creates a special liquid pump selection diagram based on the special liquid performance curve and the special liquid auxiliary performance curve described above. For example, when selecting a pump capable of pumping a special liquid in step S70 of FIG. 2, one or more types of pumps may be selected based on the special liquid performance curve and the special liquid auxiliary performance curve. Then, the operator of the pump selection device 1 can select the most suitable pump for the delivery destination from among the plurality of models of pumps selected by the pump selection device 1.

An example of the best pump for a delivery destination is a new pump delivered to replace an existing pump, which has the same suction and discharge diameters as the pipe diameter to which the existing pump was connected. .. In this way, the pump selection device 1 presents a plurality of models of pumps, so that the operator can select a pump that meets the requirements of the delivery destination.

Here, it is assumed that the predetermined operating point OPc input to the input unit 3 is the operating point OP3 shown in FIG. The outer diameter of the impeller of the pump P1 selected as the standard pump capable of pumping the special liquid at the operating point OP3 is smaller than the outer diameter of the impeller of the operating point OP1.

The operating point OP3 exists between the QH curve Y3 and the QH curve Y4 in the performance range Rx of the pump P1. In this case, if the impeller is larger than the outer diameter showing the special liquid performance curve of the QH curve Y3, the axial power of the pump P1 exceeds the rated output of the drive machine of the pump when the pump P1 is operated. There is a risk. Therefore, the processing unit 5 determines the outer diameter of the impeller of the standard pump P1 to be the impeller diameter showing the special liquid performance curve of the QH curve Y3.

In the case of a special liquid with a higher viscosity and specific gravity than fresh water, the shaft power increases as shown in Fig. 6, so change the outer diameter of the impeller so that the shaft power of the pump P1 does not exceed the rated output of the drive. By clarifying, the number of standard pump models that can be selected by the processing unit 5 will increase. In this way, the processing unit 5 creates a special liquid pump selection diagram that reflects the special liquid auxiliary performance curve, so that the processing unit 5 can obtain the optimum outer diameter of the impeller suitable for the input transfer liquid information. The number of standard pump models that can be easily and quickly determined and that the processing unit 5 can easily select from the special liquid pump selection diagram can be increased.

In this way, the pump selection device 1 for selecting a pump capable of pumping the conveyed liquid at a predetermined operating point OPc includes an operating point OPc, an input unit 3 for inputting the conveyed liquid information, and a storage unit for storing various information. The pump selected by the pump selection device 1 including 4 and a processing unit 5 for processing various information is a standard pump whose handling liquid is fresh water, and the various information stored in the storage unit 4 is at least. Includes performance information for one model of standard pump. Then, the processing unit 5 selects a pump capable of pumping the conveyed liquid at the operating point OPc based on the performance information of the standard pump and the conveyed liquid information.
In one embodiment, the transport liquid of the pump selection device 1 is a special liquid.
In one embodiment, the storage unit 4 stores a special liquid performance curve. Then, the processing unit 5 selects a pump based on the special liquid performance curve and the conveyed liquid information.
In one embodiment, the storage unit 4 stores a standard performance curve. Then, the processing unit 5 calculates the special liquid performance curve based on the standard performance curve and the viscosity and specific density of the special liquid.
In one embodiment, the storage unit 4 stores a special liquid pump selection diagram. Then, the processing unit 5 selects a pump capable of pumping the special liquid at the operating point OPc based on the special liquid pump selection diagram and the conveyed liquid information.
In one embodiment, the storage unit 4 stores the special liquid performance curve. Then, the processing unit 5 calculates a special liquid pump selection diagram based on the special liquid performance curve.
In one embodiment, the storage unit 4 stores the performance information of the standard pump and the representative special liquid performance curve. Then, if the viscosity and specific gravity of the conveyed liquid input to the input unit 3 are within the viscosity specific gravity range Z, the processing unit 5 is a pump capable of pumping the conveyed liquid at the operating point OPc based on the representative special liquid performance curve. To select.
In one embodiment, the representative special liquid is the liquid with the highest viscosity and specific density in the range where the viscosity and specific density accumulated within the predetermined time interval ΔT1 are concentrated.
In one embodiment, the special liquid pump selection diagram shows the performance (auxiliary special liquid performance curves Y3 and Y4) in which the outer diameter of the impeller is changed as the auxiliary special liquid performance curve.
In one embodiment, the lowest performance curve among the performance curves obtained in the performance tests performed within the predetermined time interval ΔT2 for a plurality of standard pumps is used as the performance of the standard pump.
In one embodiment, an image display is further provided, and the processing unit 5 displays the performance information of the standard pump on the image display 6.

Furthermore, in order to select a pump that can pump the conveyed liquid at a predetermined operating point OPc, the pump selection diagram creation device that creates a pump selection diagram showing the performance range in which the pump can be used appropriately is a storage unit that stores various information. 4 and a processing unit 5 for processing various information are provided, and the various information has a standard performance curve showing the performance of the pump when the handling liquid is fresh water, and the handling liquid has a different viscosity and / or specific gravity from that of fresh water. Includes a special liquid performance curve showing the performance of the pump when it is a special liquid. Then, the processing unit 5 calculates a special liquid pump selection diagram based on the standard performance curve and the special liquid performance curve.
In one embodiment, the processing unit 5 calculates the special liquid performance curve based on the standard performance curve and the viscosity and specific density of the special liquid, and sets the performance range in the special liquid pump selection diagram to the performance in the standard performance curve. Calculated based on the range.
In one embodiment, the special liquid pump selection diagram for a special liquid whose viscosity and / or specific gravity is within a given viscosity specific gravity range Z is representative of having the standard performance curve and the highest viscosity and specific gravity within the given viscosity specific gravity range Z. Calculated based on the special liquid performance curve of the special liquid.
In one embodiment, the representative special liquid is the liquid having the highest viscosity and specific density in the range where the viscosity and specific density accumulated in the predetermined time interval ΔT1 are concentrated.
In one embodiment, the special liquid pump selection diagram shows the performance (auxiliary special liquid performance curves Y3 and Y4) in which the outer diameter of the impeller is changed as the auxiliary special liquid performance curve.
In one embodiment, as the standard performance curve, the optimum performance curve, which is the most suitable performance curve, is selected from among the plurality of standard performance curves obtained in the performance inspection performed within the predetermined time interval ΔT2.
In one embodiment, the optimum performance curve is the performance curve having the lowest performance among the plurality of standard performance curves obtained by the performance inspection.

The input unit 3, the storage unit 4, the processing unit 5, and the image display unit 6 are composed of a plurality of devices and may be connected via a network or the like. That is, a pump capable of pumping the conveyed liquid at the operating point based on the input unit 3 for inputting the conveyed liquid information, the storage unit 4 for storing the performance information of the standard pump, and the performance information and the conveyed liquid information of the standard pump. The processing unit 5 for selecting the above and the image display 6 for displaying the selection result are composed of a plurality of information processing devices (for example, a personal computer), and the plurality of information processing devices are connected to a network (for example, the Internet or an in-house LAN). ), Communication (serial communication, packet communication), etc., the pump selection device 1 may be configured by being connected so that various information can be transmitted and received.

Further, in the present embodiment, a pump selection diagram creating device that calculates a special liquid pump selection diagram based on the performance information of the standard pump and the conveyed liquid information, and a selection diagram created by the pump selection diagram creating device are used. The pump selection device for selecting the pump is configured as one device, the pump selection device 1, but the present invention is not limited to this, and the pump selection drawing creation device and the pump selection device may be configured with separate devices. .. Also in this case, the pump selection diagram creation device and the pump selection device may be connected so as to be able to transmit and receive various information via a network (for example, the Internet, an in-house LAN, etc.) or communication (serial communication, packet communication) or the like.

[Example 2: Pump selection system]
FIG. 17 is a schematic diagram showing an example of a pump selection system including the pump selection device 1 according to the above-described embodiment. In the pump selection system 100 shown in FIG. 17, the configuration and operation of the pump selection device 1 not particularly described are the same as the configuration and operation of the pump selection device 1 according to the above-described embodiment, and therefore the overlapping description thereof is omitted. do.

As described above, in order to obtain the special liquid pump selection diagram, the processing unit 5 of the pump selection device 1 obtains a special liquid performance curve based on the standard performance curve of the standard pump and the viscosity and specific density of the special liquid. calculate. Further, the processing unit 5 may calculate an auxiliary special liquid performance curve. Therefore, depending on the processing capacity of the processing unit 5, it may take a long time for the calculation process to obtain the special liquid pump selection diagram. Furthermore, since the conveyed liquid information such as the viscosity and specific gravity of the special liquid often differs depending on the customer's request, the storage unit 4 displays a huge amount of data regarding a plurality of special liquid performance curves and a special liquid pump selection diagram. It may not be possible to remember. Further, in order to obtain the optimum pump selection diagram, it is necessary to periodically input the performance curve PC1 obtained by a plurality of performance tests into the pump selection device 1.

According to the pump selection system 100, it is possible to create a special liquid pump selection diagram in a short time and select a standard pump capable of pumping the conveyed liquid at a predetermined operating point OPc in a short time. Further, a huge amount of data regarding a plurality of special liquid performance curves and special liquid pump selection diagrams can be stored in a relay processing device described later.

The pump selection system 100 shown in FIG. 17 includes the pump selection device 1 described above, a relay processing device (for example, a server) 30 connected to the pump selection device 1 so as to be able to transmit and receive information, and a relay processing device 30 and information. It is provided with a terminal processing device 32 connected so as to be able to transmit and receive.

The end treatment device 32 is installed, for example, in the factory of the pump manufacturer. The end processing device 32 has a terminal input unit 35 into which performance information of a standard pump such as a performance curve PC1 obtained in a performance inspection performed periodically is input, and information and an end input to the end input unit 35. The terminal storage unit 36 that stores various information including the calculation result in the processing unit 37, the terminal processing unit 37 that processes various information stored in the terminal storage unit 36, and the data processed by the terminal processing unit 37 are displayed. It includes a terminal image display 38 and. Such an end processing device 32 can be configured from an information terminal such as a personal computer or a tablet terminal, for example. As an example, the terminal input unit 35 is composed of a touch panel, a keyboard, a mouse, and the like. The terminal input unit 35 may include a scanner capable of reading the performance information of a standard pump such as the performance curve PC1 obtained in the performance inspection, or may include an input port for inputting information from a recording medium such as a USB memory. It may be included. Further, various information may be input to the terminal input unit 35 via the network. Further, the terminal processing device 32 includes a terminal interface (input / output interface) 39 for transmitting / receiving information to / from the relay processing device 30. Various information stored in the terminal storage unit 36 (for example, standard performance curve, performance information of a standard pump such as a performance curve PC1 obtained in a performance inspection) is transmitted to the relay processing device 30 via the terminal interface 39. be able to.

The relay processing device 30 has a relay interface (input / output interface) 45 for transmitting and receiving various information to and from the terminal processing device 32 and the pump selection device 1, and a relay storage unit 46 for storing various information received via the relay interface 45. And a relay processing unit 47 that processes various information stored in the relay storage unit 46.

The relay interface 45 of the relay processing device 30 is connected to the terminal interface 39 of the terminal processing device 32 by wire or wirelessly. Therefore, the terminal processing device 32 can transmit various information stored in the terminal storage unit 36 to the relay processing device 30 via the terminal interface 39, and the relay processing device 30 transmits from the terminal processing device 32. Various kinds of information can be received via the relay interface 45. Further, the relay processing device 30 can transmit various information stored in the relay storage unit 46 to the terminal processing device 32 via the relay interface 45, and the terminal processing device 32 transmits from the relay processing device 30. The information can be received via the terminal interface 39.

In this embodiment, the pump selection device 1 has an input / output interface 8. The input / output interface 8 is connected to the relay interface 45 of the relay processing device 30 by wire or wirelessly. Therefore, the pump selection device 1 can transmit various information stored in the storage unit 4 to the relay processing device 30 via the input / output interface 8, and the relay processing device 30 transmits from the pump selection device 1. Various kinds of information can be received via the relay interface 45. Further, the relay processing device 30 can transmit various information stored in the relay storage unit 46 to the pump selection device 1 via the relay interface 45, and the pump selection device 1 transmits from the relay processing device 30. Various kinds of information can be received via the input / output interface 8. The processing unit 5 of the pump selection device 1 can process various information transmitted from the relay processing device 30.

Performance information of a standard pump such as a standard performance curve, a standard pump selection diagram, and a performance curve PC1 obtained in a performance inspection can be input from the terminal input unit 35 to the end processing device 32. The terminal processing unit 37 of the terminal processing device 32 stores the performance information of the standard pump input from the terminal input unit 35 in the terminal storage unit 36. Further, the terminal processing unit 37 can transmit the performance information of the standard pump stored in the terminal storage unit 36 to the relay processing device 30. The relay processing unit 47 of the relay processing device 30 stores the performance information of the standard pump transmitted from the terminal processing device 32 in the relay storage unit 46. The relay storage unit 46 stores in advance various information including performance information of the standard pump such as a standard pump selection diagram and a standard performance curve.

Next, a pump selection method using the pump selection system shown in FIG. 17 will be described with reference to FIG. FIG. 18 is a flowchart illustrating an example of a pump selection method for selecting a pump using the pump selection system shown in FIG.

First, in the input unit 3 of the pump selection device 1, the transfer liquid information including the predetermined operating point OPc (that is, the total head and the discharge flow rate) of the pump desired by the delivery destination, the name of the transfer liquid, the viscosity, the specific gravity, etc. is input. It is input (step S701). The input liquid information may include the type, shape, pump size (pump size such as diameter and output) and shaft power desired by the delivery destination. This step S701 corresponds to step S01 in FIG. Next, the processing unit 5 of the pump selection device 1 transmits the conveyed liquid information to the relay processing device 30 via the input / output interface 8 (step S710). The relay processing device 30 receives the conveyed liquid information via the relay interface 45, and the relay processing unit 32 stores the received conveyed liquid information in the relay storage unit 46.

Next, the relay processing unit 32 determines whether or not the viscosity and specific gravity of the conveyed liquid are the same as those of fresh water (step S720). In step S720, the relay processing unit 32 may determine whether or not the name of the received transport liquid is fresh water. The process of step S720 corresponds to step S10 of FIG.

When the transport liquid is fresh water (step S720: YES), the relay processing unit 47 of the relay processing device 30 transfers the standard performance curve and the standard pump selection diagram stored in advance in the relay storage unit 46 to the pump selection device 1. Transmit (step S730). When the pump selection device 1 receives the standard performance curve and the standard pump selection diagram, which are the performance information of the standard pump, via the input / output interface 8, the processing unit 5 of the pump selection device 1 receives step S20 shown in the flowchart of FIG. Perform each subsequent step. As described above, the processing unit 5 of the pump selection device 1 transfers the transport liquid (that is, fresh water) based on the received standard performance curve or standard pump selection diagram and the transport liquid information input to the input unit 3. A standard pump capable of pumping at a predetermined operating point OPc can be selected. Specifically, as described above, the processing unit 5 reads out the received standard pump selection diagram and selects a standard pump having a performance range including a predetermined operating point OPc. Alternatively, the processing unit 5 searches the received standard performance curve until a pump having a standard performance curve that can be used at a predetermined operating point OPc is found.

When the corresponding pump is found, the processing unit 5 selects the pump as a standard pump capable of pumping the conveyed liquid at a predetermined operating point OPc. If the corresponding pump is not found in all the received standard performance curves, the processing unit 5 determines that there is no standard pump that can be selected. Then, the processing unit 5 proceeds to step S30 in FIG.

Next, the processing unit 5 determines the presence or absence of the selected standard pump (see step S30 in FIG. 2), and if there is a selected standard pump (see “Yes” in step S30 in FIG. 2), selects the selected standard pump. The performance information of the standard pump is displayed on the image display unit 6 together with the predetermined operating point OPc (see step S40 in FIG. 2). If a standard pump capable of pumping the conveyed liquid is not found at the predetermined operating point OPc, the processing unit 5 determines that there is no standard pump that can be selected (see "No" in step S30 of FIG. 2). In this case, the processing unit 5 displays on the image display unit 6 that there is no suitable standard pump (see step S50 in FIG. 2).

When the conveyed liquid is a special liquid having a viscosity and specific gravity different from that of fresh water (step S720: No), the relay processing unit 47 of the relay processing apparatus 30 stores the viscosity and specific gravity of the received special liquid in the relay storage unit 46. Then, it is determined whether or not the special liquid (conveyed liquid) can be used with the standard pump (step S740). The process of step S740 corresponds to the process of step S60 of FIG. When the name, viscosity, and specific gravity of the received special liquid can be used in the standard pump (step S740: Yes), the relay processing unit 32 uses the special liquid according to the flowchart shown in FIG. 5 and the flowchart shown in FIG. A performance curve (see FIG. 6) and a special liquid pump selection diagram (see FIG. 10) are created (step S750). Further, the relay processing unit 47 stores the created special liquid performance curve and special liquid pump selection diagram in the relay storage unit 46. In the present embodiment, the special liquid pump selection diagram is stored in the relay storage unit 46 that stores the conveyed liquid information transmitted from the pump selection device 1 and the performance information of at least one standard pump, and the relay storage unit 46. It is calculated by a pump selection diagram creation system (in this embodiment, the pump selection system 100) provided with a relay processing unit 47 that calculates a special liquid pump selection diagram based on the performance information of the standard pump and the transfer liquid information.

Next, the relay processing device 30 transmits the special liquid performance curve and the special liquid pump selection diagram created by the relay processing unit 47 to the pump selection device 1 via the relay interface 45 (step S760). When the pump selection device 1 receives the special liquid performance curve and the special liquid pump selection diagram, which are the performance information of the standard pump, via the input / output interface 8, the processing unit 5 of the pump selection device 1 is shown in the flowchart of FIG. Each step after step S70 is executed. Specifically, the processing unit 5 of the pump selection device 1 is based on the special liquid pump selection diagram, which is the performance information of the standard pump, and the predetermined operating point OPc, which is the transfer liquid information input to the input unit 3. , Select a pump that can pump special liquid.

At this time, the processing unit 5 of the pump selection device 1 can select the pump by using the second selection process shown in the flowchart of FIG. Specifically, the processing unit 5 describes a predetermined operating point OPc in the received special liquid pump selection diagram, and determines whether or not there is a model having a performance range including this operating point OPc (FIG. 11). Step S310). If the predetermined operating point OPc is within the performance range of any of the pumps in the special liquid pump selection diagram (see “Yes” in step S310 in FIG. 11), the processing unit 5 determines that there is a pump that can be selected (see “Yes”). See step S320 in FIG. 11). After that, the processing unit 5 ends the second selection process, proceeds to step S30 in FIG. 2, and executes the steps after the step S30.

If the predetermined operating point OPc is not within the performance range of any of the pumps in the special liquid pump selection diagram (see "No" in step S310 in FIG. 11), the processing unit 5 has no pump to be selected. Judgment (see step S330 in FIG. 11). After that, the processing unit 5 ends the second selection process, proceeds to step S50 in FIG. 2, and displays an indication on the image display unit 6 that there is no suitable standard pump.

According to the present embodiment, the relay processing unit 47 is special based on the standard performance curve stored in the relay storage unit 46 and the conveyed liquid information such as the viscosity and specific gravity of the special liquid transmitted from the pump selection device 1. A liquid performance curve is created, and a special liquid pump selection diagram is created based on the special liquid performance curve. This special liquid pump selection diagram is transmitted from the relay processing device 30 to the pump selection device 1. Since the performance range in which the special liquid can be pumped by each standard pump is shown in the special liquid pump selection diagram, the processing unit 5 of the pump selection device 1 can pump the special liquid from the received special liquid pump selection diagram. Standard pump can be easily selected.

When the name, viscosity, and specific gravity of the received special liquid can be used in the standard pump in step S740 (step S740: Yes), the relay processing unit 47 performs the first selection process shown in the flowchart of FIG. May be good. In this case, the relay processing unit 47 selects as model 1 a model in which the predetermined operating point OPc is within the usage range or a model with an output close to the model in the standard pump selection diagram stored in the relay storage unit 46, and the model 1 is selected. The special liquid performance curve of model 1 is created according to the flowchart shown in FIG.

The relay processing unit 47 determines whether or not the predetermined operating point OPc is within the usage range in the special liquid performance curve of the model 1 (see step S110 in FIG. 7). When the predetermined operating point OPc described in the special liquid performance curve is within the usage range (see “Yes” in step S110 in FIG. 7), the relay processing unit 47 determines the standard pump of model 1 as the selection pump. It is determined that there is a pump that can be selected (see step S170 in FIG. 7). After that, the relay processing unit 47 transmits performance information such as a special liquid characteristic curve of the model 1 to the pump selection device 1, and the processing unit 5 of the pump selection device 1 that has received the performance information is in step S30 or later of FIG. Perform each step.

When the predetermined operating point OPc described in the special liquid performance curve of model 1 is out of the usage range (see “No” in step S110 in FIG. 7), the relay processing unit 47 determines whether or not there is the next model. That is, it is determined whether or not the standard performance curves of all the models stored in the relay storage unit 46 have been confirmed (see step S120 in FIG. 7). If the relay processing unit 47 determines that all the models stored in the relay storage unit 46 are out of the range of use (see "Yes" in step S120 of FIG. 7), the relay processing unit 47 determines that there is no standard pump that can be selected (FIG. 7). 7). After that, the relay processing unit 47 transmits information to the pump selection device 1 that there is no standard pump that can be selected, and the processing unit 5 of the pump selection device 1 that has received this information is in each step after step S30 in FIG. To execute.

When the relay processing unit 47 determines that there is a model to be confirmed next among the standard performance curves stored in the relay storage unit 46 (see “No” in step S120 of FIG. 7), it is shown in step S130 of FIG. Execute the process. Specifically, it is determined whether or not the predetermined operating point OPc is located below the QH curve of the special liquid performance curve of the model 1 (see step S130 in FIG. 7). When it is determined that the predetermined operating point OPc is located below the QH curve of the special liquid performance curve of the model 1 (see “Yes” in step S130 of FIG. 7), the relay processing unit 47 may use the relay processing unit 47. A standard performance curve of a model having an output smaller than that of model 1 is selected from the standard performance curves stored in the relay storage unit 46 (see step S140 in FIG. 7), and a special liquid performance curve is selected based on the selected standard performance curve. (See step S150 in FIG. 7). If it is determined that the predetermined operating point OPc is located above the QH curve of the special liquid performance curve of model 1 (see "No" in S130 of FIG. 7), the relay processing unit 47 , A standard performance curve of a model having an output larger than that of model 1 is selected from the standard performance curves stored in the relay storage unit 46 (see step S160 in FIG. 7), and the special liquid performance is based on the selected standard performance curve. Create a curve (see step S150 in FIG. 7). In the step of creating the special liquid performance curve, the relay processing unit 47 creates the special liquid performance curve according to the flowchart shown in FIG. 5 described above. After creating the special liquid performance curve of the next model, the relay processing unit 47 determines whether or not the predetermined operating point OPc is within the usage range in the special liquid performance curve of the next model (FIG. 7). Step S110).

In this way, the relay processing unit 47 repeats the work of confirming the special liquid performance curve until a standard pump capable of pumping the special liquid at a predetermined operating point OPc is found. When a special liquid performance curve capable of pumping special liquid is found at a predetermined operating point OPc, the relay processing unit 47 determines the standard pump of this special liquid performance curve as the selection pump, and there is a pump that can be selected. Judgment (see step S170 in FIG. 7). After that, the relay processing unit 47 transmits performance information such as a special liquid characteristic curve of the selected pump to the pump selection device 1, and the processing unit 5 of the pump selection device 1 that has received the performance information receives step S30 in FIG. Perform each subsequent step.

In the present embodiment, when the predetermined operating point OPc is located below the QH curve of the model 1, the relay processing unit 47 selects the standard performance curve of the model having an output smaller than that of the model 1. When the predetermined operating point OPc is located above the QH curve of model 1, the standard performance curve of the model with an output larger than that of model 1 is selected, but regardless of this, the predetermined operating point OPc is the model. Regardless of whether it is located below or above the QH curve of 1, it may be confirmed whether or not the predetermined operating point OPc is out of the range of use in all the standard performance curves stored in the relay storage unit 46. This is because, for example, in the model 1 in which the operating point OPc is located below the QH curve, even if the shaft power at the operating point OPc exceeds the desired shaft power of the delivery destination, the output of the model 2 having a larger output than that of the model 1 This is because the shaft power at the operating point OPc of the model 2 may be within the range of the shaft power desired by the delivery destination because the pump efficiency at the operating point OPc is better.

In addition, the range of use for each model may overlap with each other, and it may be possible to pump a special liquid at the operating point OPc in the standard pumps of a plurality of models. Therefore, even after the relay processing unit 47 finds a standard pump capable of pumping the special liquid at the predetermined operating point OPc, the predetermined operating point OPc is out of the range of use in all the standard performance curves stored in the relay storage unit 46. You may check whether or not. If the operator of the pump selection device 1 presents a plurality of models to the delivery destination, the most suitable pump can be selected from the presented pumps at the delivery destination.

The description returns to step S740. If the relay processing unit 47 determines that the special liquid cannot be used in the predetermined standard pump based on the received special liquid transport liquid information (step S740: No), it determines that there is no standard pump that can be selected (step S740: No). S770), information that there is no suitable standard pump is transmitted to the pump selection device 1 (step S780). After that, the processing unit 5 proceeds to step S30 of FIG. 2 and executes each step after the step S30.

As described above, the pump selection system 100 includes the transfer liquid information including the viscosity and specific gravity of the transfer liquid input to the input unit 3 of the pump selection device 1, and the standard pump stored in the storage unit 47 of the relay processing device 30. Based on the performance information, select a pump that can pump the conveyed liquid at the predetermined operating point OPc. Therefore, by using this pump selection system 100, regardless of whether the transport liquid is fresh water or special liquid, a pump that can pump the transport liquid at a predetermined operating point OPc is automatically selected from among a plurality of types of pumps. Can be selected.

In the present embodiment, the pump selection device 1 relays the input transfer liquid information each time the transfer liquid information such as a predetermined operating point OPc, the viscosity and specific gravity of the special liquid is input to the input unit 3. Send to 30. Each time the relay processing unit 47 of the relay processing device 30 receives the conveyed liquid information, the relay processing unit 47 calculates a special liquid performance curve based on the viscosity and specific density of the special liquid contained in the conveyed liquid information and the standard performance curve. Create a special liquid pump selection diagram based on the calculated special liquid performance curve. Further, the relay processing unit 47 stores the plurality of special liquid pump selection diagrams thus created in the relay storage unit 46.

When it is determined in step S720 that the conveyed liquid is a special liquid different from that of fresh water (step S720: No), the relay processing unit 47 searches for the information stored in the relay storage unit 46 and receives it. It may be determined whether or not the special liquid performance curve and the special liquid pump selection diagram created based on the same viscosity and specific gravity as the viscosity and specific gravity of the special liquid are stored in the relay storage unit 46. When such a special liquid performance curve and a special liquid pump selection diagram are stored in the relay storage unit 46, the relay processing unit 47 omits step S750 and in step S760, the special liquid performance curve and the special liquid pump selection diagram are stored. The liquid pump selection diagram is transmitted to the pump selection device 1. As described above, the processing unit 5 of the pump selection device 1 can select a standard pump capable of pumping the special liquid based on the received special liquid performance curve or the special liquid pump selection diagram.

According to the present embodiment, the relay processing unit 47 creates a special liquid performance curve based on the standard performance curve stored in the relay storage unit 46 and the viscosity and specific gravity of the special liquid transmitted from the pump selection device 1. Then, create a special liquid pump selection diagram based on the special liquid performance curve. That is, the pump selection diagram creation system (in this embodiment, the pump selection system 100) has a relay storage unit 47 that stores a standard performance curve and a special liquid performance curve, and a relay processing unit 47 that processes the various information. The relay processing unit 47 calculates a special liquid pump selection diagram in which the conveyed liquid is a special liquid based on the standard performance curve and the special liquid performance curve. Further, the relay processing unit 47 transmits the special liquid pump selection diagram to the pump selection device 1. Since this special liquid pump selection diagram shows the performance range in which the conveyed liquid can be appropriately used in each standard pump of special liquid, the processing unit 5 of the pump selection device 1 is special from the special liquid pump selection diagram. A standard pump capable of pumping liquid can be easily selected.

The relay processing unit 47 of the relay processing device 30 has a very high processing capacity (that is, a processing capacity higher than that of the processing unit 5 of the pump selection device 1). Therefore, the relay processing device 30 can execute the above-mentioned calculation process for obtaining the special liquid performance curve and the process for creating the special liquid pump selection diagram based on the special liquid performance curve at a higher speed than the pump selection device 1. can. That is, by causing the relay processing device 30 to execute these processes, the special liquid performance curve and the special liquid pump selection diagram can be obtained at a higher speed than that of the pump selection device 1. As a result, the pump selection device 1 can select a standard pump capable of pumping the special liquid at a predetermined operating point OPc in a short time.

Further, the relay storage unit 46 of the relay processing device 30 has a much larger capacity than the storage unit 4 of the pump selection device 1. Therefore, the relay storage unit 46 can store a huge amount of data regarding a plurality of special liquid performance curves and special liquid pump selection diagrams. The relay processing unit 47 of the relay processing device 30 transmits a part of the data of the plurality of special liquid performance curves and the special liquid pump selection diagram stored in the relay storage unit 46 to the pump selection device 1 and / or the end processing device 32. You may.

[Modification 1]
In the present modification 1, the above-mentioned representative special liquid pump selection diagram is created by the relay processing unit 47 of the relay processing device 30. Therefore, as shown in FIG. 17, the relay storage unit 46 has a storage area X, and the viscosity and specific gravity of the special liquid contained in the conveyed liquid information transmitted from the pump selection device 1 are in this storage area. It is stored in X. The storage area X is formed in the relay storage unit 46 of the relay processing device 30 in a table structure (see FIG. 17). The storage area X of the relay storage unit 46 has a table structure and has an area for storing the viscosities and specific densities of a plurality of special liquids. The relay processing unit 47 creates a representative special liquid pump selection diagram according to the flowchart shown in FIG.

First, the relay processing unit 47 clears the viscosity and specific gravity of the special liquid accumulated in the storage area X (see step S410 in FIG. 12). Next, the relay processing unit 47 stores the viscosity and specific gravity of the special liquid transmitted from the pump selection device 1 in the storage area X of the relay storage unit 46. This step corresponds to step S420 in FIG. The viscosity and specific gravity of the special liquid are accumulated until a predetermined time interval ΔT1 (for example, several months to several years) elapses (see step S430 in FIG. 12). After the elapse of the predetermined time interval ΔT1 (step S430: Yes), the relay processing unit 47 has a range in which the viscosity and specific density of the accumulated special liquid are concentrated (for example, the value of the viscosity and specific gravity of the accumulated special liquid is 80%). The range that occupies the above) is determined as the viscosity specific gravity range Z (see FIG. 13) (see step S440 in FIG. 12). Next, the relay processing unit 47 determines a special liquid having the maximum viscosity and specific gravity in the viscosity specific gravity range Z (see the special liquid designated by the reference numeral “LS” in FIG. 13) (see step S450 in FIG. 12). .. As described above, the special liquid having the maximum viscosity and specific gravity in the viscosity specific gravity range Z is the "representative special liquid". The operator may specify the viscosity specific gravity range Z, or the relay processing unit 47 may calculate the viscosity specific gravity range Z. When the worker specifies the viscosity specific gravity range Z, the worker inputs the viscosity specific gravity range Z from the input unit 3 of the pump selection device 1, and the processing unit 5 of the pump selection device 1 inputs the input viscosity specific gravity range Z. Is transmitted to the relay processing device 30. Here, the performance range Rx of the special liquid within the viscosity specific gravity range Z partially overlaps with the performance range Rx of the representative special liquid.

Next, the relay processing unit 47 creates a representative special liquid performance curve and a representative special liquid pump selection diagram based on the standard performance curve stored in the relay storage unit 46 and the viscosity and specific gravity of the representative special liquid (representative special liquid performance curve). See step S460 in FIG. 12). Here, if the special liquid performance curve and the special liquid pump selection diagram created previously based on the viscosity and specific gravity of the representative special liquid are stored in the relay storage unit 46, the process of step S460 is omitted. You may.

When the relay processing unit 47 of the relay processing device 30 creates the representative special liquid performance curve and the representative special liquid pump selection diagram, the relay processing unit 47 at a predetermined operating point OPc according to the flowchart shown in FIG. Select a pump that can pump the conveyed liquid.

Specifically, the relay processing unit 47 of the relay processing device 30 determines whether or not the viscosity and specific gravity of the special liquid contained in the conveyed liquid information transmitted from the pump selection device 1 are within the viscosity specific gravity range Z. (See step S510 in FIG. 14). When the viscosity and specific gravity of the special liquid are within the viscosity specific gravity range Z (see “Yes” in step S510 in FIG. 14), the relay processing unit 47 selects a pump using the representative special liquid pump selection diagram (FIG. 14). Step S520). Specifically, the relay processing unit 47 carries out the above-mentioned second selection process using the representative special liquid pump selection diagram. When there is a selected standard pump, the relay processing unit 47 transmits performance information such as a special liquid characteristic curve of the selected pump to the pump selection device 1, and receives the performance information, the processing unit of the pump selection device 1. 5 executes each step after step S30 in FIG. If there is no standard pump that can be selected, the relay processing unit 47 sends information to the pump selection device 1 that there is no suitable standard pump, and the processing unit 5 of the pump selection device 1 that receives this information is shown in FIG. Each step after step S30 of is executed.

When the viscosity and specific gravity of the special liquid are outside the viscosity specific gravity range Z (see “No” in step S510 in FIG. 14), the relay processing unit 47 draws a special liquid performance curve or a special liquid pump selection diagram as described above. Use to select the pump (see step S530 in FIG. 14). Specifically, the relay processing unit 47 creates the special liquid performance curve or the special liquid pump selection diagram, and selects the pump using the special liquid performance curve or the special liquid pump selection diagram. 2 Carry out the selection process.

If there is a standard pump selected by the relay processing unit 47, the relay processing unit 47 sends performance information such as a special liquid characteristic curve of the selected pump to the pump selection device 1, and the pump selection unit 47 receives the performance information. The processing unit 5 of the device 1 executes each step after step S30 in FIG. When the relay processing unit 47 determines that there is no standard pump that can be selected, the relay processing unit 47 sends information to the pump selection device 1 that there is no suitable standard pump, and the pump selection device 1 receives this information. The processing unit 5 of FIG. 2 executes each step after step S30 in FIG.

As described above, the representative special liquid pump selection diagram can be used as a pump selection diagram for selecting a standard pump capable of pumping a special liquid whose viscosity and specific gravity are within the viscosity specific gravity range Z. Therefore, when the viscosity and specific gravity of the special liquid are within the viscosity specific gravity range Z, a standard pump capable of pumping the special liquid can be selected by using the representative special liquid performance curve or the representative special liquid pump selection diagram. Therefore, a standard pump capable of pumping a special liquid can be easily and quickly selected.

In this modification 1, the relay processing unit 47 creates a representative special liquid performance curve or a representative special liquid pump selection diagram specialized for the viscosity and specific gravity of the special liquid. Similarly, another special liquid pump selection diagram (that is, another) specialized for the operating point, pump model (caliber / output), pump shape, etc., which are frequently input to the input unit 3 as a request from the customer. (Representative special liquid pump selection diagram) may be created.

[Modification 2]
In the second modification, the relay processing unit 47 of the relay processing device 30 calculates the special liquid performance curve based on the performance curve PC1 acquired in the performance inspection performed periodically.

The performance curve PC1 is input to the terminal input unit 35 of the terminal processing device 32, and the terminal processing unit 37 stores the performance curve PC1 in the terminal storage unit 36. The end processing unit 37 transmits the performance curve PC1, which is the performance information of the standard pump, to the relay processing device 30 via the end interface 39. The performance curve PC1 is periodically transmitted from the terminal processing device 32 to the relay processing device 30 via the network, for example. The relay processing unit 47 of the relay processing device 30 stores the received performance curve PC1 in the relay storage unit 46. The relay processing unit 47 has a special liquid performance curve and a special liquid based on the performance curve PC1 stored in the relay storage unit 46 and the viscosity and specific gravity of the special liquid contained in the conveyed liquid information transmitted from the pump selection device 1. Create a pump selection diagram. In this case, the relay processing unit 47 can select a pump based on the performance curve PC1 and transmit the performance information of the selected pump to the pump selection device 1.

The relay processing unit 47 creates a special liquid pump selection diagram based on the performance curve PC1 acquired in the performance inspection according to the flowchart shown in FIG. First, the relay processing unit 47 clears the storage area Y formed in the relay storage unit 47 (see step S610 in FIG. 15). Next, the relay processing unit 47 stores the performance curve PC1 in the storage area Y of the relay storage unit 46 (see step S620 in FIG. 15). Specifically, each time a performance inspection is performed, the performance curve PC1 obtained in the performance inspection is input to the terminal processing device 30 from the terminal input unit 35 of the terminal processing device 32, and the terminal processing unit 37 receives the terminal processing unit 37. The input performance curve PC1 is stored in the terminal storage unit 36, and the performance curve PC1 is relayed every time a performance test is performed or every predetermined time interval ΔT2 (for example, one week to several months). Send to 30. The relay processing device 30 stores the received performance curve PC1 in the storage area Y. The relay processing unit 47 accumulates the performance curve PC1 in the storage area Y during the predetermined time interval ΔT2 (see step S630: Yes in FIG. 15), and then the plurality of performance curves PC1 stored in the storage area Y. The most suitable performance curve is selected as the optimum performance curve (see step S640 in FIG. 15).

Next, the relay processing unit 47 creates a special liquid performance curve based on the optimum performance curve and the viscosity and specific gravity of the special liquid, and further creates an optimum pump selection diagram based on the created special liquid performance curve. (See step S650 in FIG. 15). As the viscosity and specific gravity of the special liquid used here, it is preferable to use the viscosity and specific gravity of the above-mentioned representative special liquid. The relay processing unit 47 may select a pump based on the special liquid performance curve created based on the optimum performance curve, the optimum pump selection diagram, and the predetermined operating point OPc. When creating the special liquid performance curve and the optimum pump selection diagram created based on the optimum performance curve and the viscosity and specific gravity of the special liquid at other timings, step S650 may be omitted, or step S650 may be omitted. In S650, only the special liquid performance curve may be created.

The relay processing unit 47 selects a standard pump capable of pumping the special liquid at a predetermined operating point OPc from the optimum pump selection diagram. This makes it possible to select a pump based on an actual performance curve, and after delivering the standard pump to a customer, the standard pump can be operated within a desired performance range.

When the viscosity and specific gravity of the representative special liquid shown in Modification 1 are larger than those of fresh water, the optimum performance curve is a performance curve showing the lowest performance among the plurality of performance curves stored in the storage area Y. You may use it. If the optimum pump selection diagram is created using the performance curve PC1 showing the lowest performance within the predetermined time interval ΔT2, the axial power of the selected pump is within the range of use. As the optimum performance curve, a performance curve obtained by averaging a plurality of performance curves PC1 stored in the storage area Y at arbitrary flow points may be used, or among the plurality of performance curves PC1 stored in the storage area Y. , A performance curve obtained by averaging performance curves within a predetermined range may be used.

[Modification 3]
In the third modification, the relay processing unit 47 of the relay processing device 30 creates a special liquid pump selection diagram as shown in FIG. That is, the relay processing unit 47 creates a special liquid pump selection diagram on which the auxiliary special liquid performance curve (for example, the auxiliary special liquid performance curves Y3 and Y4 shown in FIG. 16) is drawn. As described above, the special liquid auxiliary performance curves Y3 and Y4 shown by the dotted lines in the special liquid pump selection diagram shown in FIG. 16 are Q- when the diameter of the impeller is smaller than that of the QH curve Y1. It is an H curve.

The relay processing unit 47 converts the auxiliary standard performance curve described in the standard pump selection diagram into a special liquid auxiliary performance curve based on the viscosity and specific gravity of the special liquid, and converts these special liquid auxiliary performance curves into the special liquid pump selection diagram. It may be reflected in. That is, the relay processing unit 47 creates a special liquid pump selection diagram based on the above-mentioned special liquid performance curve and special liquid auxiliary performance curve. The special liquid pump selection diagram including the special liquid auxiliary performance curve is transmitted from the relay processing device 30 to the pump selection device 1. The pump selection device 1 may select one type or a plurality of types of pumps based on the special liquid performance curve and the special liquid auxiliary performance curve. Then, the operator of the pump selection device 1 can select the most suitable pump for the delivery destination from among the plurality of models of pumps selected by the pump selection device 1.

In this way, the relay processing device 30 creates a special liquid pump selection diagram that reflects the special liquid auxiliary performance curve, so that the processing unit 5 can easily and quickly determine the optimum outer diameter of the impeller. At the same time, the number of models that can be selected by the processing unit 5 can be increased.

In the above-described embodiment, the processing unit 5 of the pump selection device 1 selects a standard pump capable of pumping the conveyed liquid at a predetermined operating point OPc, but the relay processing unit 47 of the relay processing device 30 selects the standard pump. The pump may be selected.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made within the scope of the technical idea described in the claims.

1 Pump selection device (pump selection drawing creation device)
3 Input unit 4 Storage unit 5 Processing unit 6 Image display 8 Input / output interface 11 Printing machine 30 Relay processing device 32 Terminal processing device 35 Terminal input unit 36 Terminal storage unit 37 Terminal processing unit 38 Terminal image display unit 39 Terminal interface (input) Output interface)
45 Relay interface (input / output interface)
46 Relay storage unit 47 Relay processing unit 100 Pump selection system (Pump selection diagram creation system)

Claims (11)

It is a pump selection device that selects a pump that can pump the conveyed liquid at a predetermined operating point.
An input unit for inputting the transfer liquid information including the operating point, the viscosity and the specific gravity of the transport liquid, and the input unit.
A storage unit that stores various information and
A processing unit that processes the various information is provided.
The pump is a standard pump whose handling liquid is fresh water.
The various information includes the performance information of at least one of the standard pumps.
The carrier liquid is a special liquid having a viscosity and / or a specific gravity different from that of fresh water.
The storage unit stores the performance information of the standard pump and the representative special liquid performance curve created based on the viscosity and specific gravity of the representative special liquid having the highest viscosity and specific density within a predetermined viscosity specific gravity range. Ori,
The processing unit
If the viscosity and specific gravity of the conveyed liquid input to the input unit are outside the viscosity specific gravity range , the conveyed liquid can be pumped at the operating point based on the performance information of the standard pump and the conveyed liquid information. Select a pump,
If the viscosity and specific gravity of the conveyed liquid input to the input unit are within the viscosity specific gravity range, it is necessary to select a pump capable of pumping the conveyed liquid at the operating point based on the representative special liquid performance curve. A featured pump selection device. The storage unit stores, as performance information of the standard pump, a special liquid performance curve showing the performance of the standard pump when the transport liquid is the special liquid.
The pump selection device according to claim 1 , wherein the processing unit selects a pump capable of pumping the special liquid at the operating point based on the special liquid performance curve and the conveyed liquid information. The storage unit stores a standard performance curve showing the performance of the standard pump when the transport liquid is fresh water.
The processing unit
The pump selection device according to claim 2 , wherein the special liquid performance curve is calculated based on the standard performance curve and the viscosity and specific gravity of the special liquid. The storage unit stores, as performance information of the standard pump, a special liquid pump selection diagram, which is a selection diagram when the transport liquid is the special liquid.
The processing unit
The pump selection according to any one of claims 1 to 3 , wherein a pump capable of pumping the special liquid at the operating point is selected based on the special liquid pump selection diagram and the conveyed liquid information. Device. The storage unit stores a special liquid performance curve when the transport liquid is the special liquid, and stores the special liquid performance curve.
The processing unit
The pump selection apparatus according to claim 4 , wherein the standard pump calculates a special liquid pump selection diagram showing a performance range in which the special liquid can be pumped based on the special liquid performance curve. The representative special liquid is
The pump selection apparatus according to claim 5 , wherein the liquid has the highest viscosity and specific density in a dense range in which the viscosity and specific density accumulated within a predetermined time interval are concentrated. The pump selection device according to claim 4 or 5 , wherein the special liquid pump selection diagram shows the performance of changing the outer diameter of the impeller as an auxiliary special liquid performance curve. The invention according to any one of claims 1 to 7 , wherein the lowest performance curve among the performance curves obtained in the performance tests performed on a plurality of standard pumps is used as the performance of the standard pump. Pump selection device. With more image display
The pump selection device according to any one of claims 1 to 8 , wherein the processing unit displays performance information of the standard pump on an image display. It is a pump selection system that selects a pump that can pump the conveyed liquid at a predetermined operating point.
The pump selection device according to any one of claims 1 to 9 .
A pump selection system including a relay processing device that is connected to the pump selection device so that information can be transmitted and received. A pump selection method for selecting a pump capable of pumping a conveyed liquid at a predetermined operating point by using the pump selection device according to any one of claims 1 to 9 .
The pump is a standard pump whose handling liquid is fresh water.
The carrier liquid is a special liquid having a viscosity and / or a specific gravity different from that of fresh water.
The pump selection device stores a representative special liquid performance curve created based on the performance information of the standard pump and the viscosity and specific gravity of the representative special liquid having the highest viscosity and specific density within a predetermined viscosity specific gravity range. It has a storage unit and
A step of inputting transport liquid information including the operating point and the viscosity and specific gravity of the transport liquid to the input unit ,
If the viscosity and specific gravity of the conveyed liquid input to the input unit are outside the viscosity specific gravity range, the conveyed liquid can be pumped at the operating point based on the conveyed liquid information and the performance information of the pump. If a pump is selected and the viscosity and specific gravity of the conveyed liquid input to the input unit are within the viscosity specific gravity range, a pump capable of pumping the conveyed liquid at the operating point based on the representative special liquid performance curve. A pump selection method characterized by selecting .

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