TWI752566B - Fluid supply system and fluid supply method - Google Patents

Abstract

A fluid supply system is provided with: a header to which two distribution pipes are connected; and a plurality of pumps that are respectively connected to different positions in the longitudinal direction with respect to the header. In the header of the fluid supply system, distribution pipes are respectively connected to the position of one or two pumps in the center in the arrangement of the plurality of pumps.

Description

Fluid supply system and fluid supply method

The present invention relates to a fluid supply system and a fluid supply method.

A system is known in which a pump is connected to a header to supply fluid. For example, Patent Document 1 discloses a processing hydraulic feed device including a discharge header to which a plurality of pumps are connected. This apparatus is configured to supply the treatment liquid to the use site of the treatment liquid connected to the discharge header. [Prior Art Literature] [Patent Literature]

Patent Document 1: Japanese Patent Application Laid-Open No. 6-42456

[The problem to be solved by the invention]

The treatment hydraulic feed device disclosed in Patent Document 1 is configured to supply treatment liquid to one use site. However, depending on the application, it may be preferable to supply fluid to two supply destinations from one header to which a plurality of pumps are connected. Such a configuration is not disclosed in Patent Document 1.

Here, when the fluid is supplied to two supply destinations, a configuration in which one distribution pipe is connected to the header, and the distribution pipe is branched to each supply destination can be considered. In this case, a portion of the distribution pipe to each supply destination overlaps the header. For this reason, only the overlapping portion of the distribution pipe and the header will increase the length of the piping.

On the other hand, in the configuration in which the distribution pipe is extended so as to pass through two supply destinations without branching, the length of the distribution pipe becomes longer. In this case, the space of the whole system becomes large. In addition, since the pressure loss accompanying the length of the distribution pipe increases, it is difficult to increase the capacity. Furthermore, even when the distribution pipe is not used, and the discharge side of the header is branched or extended so as to pass through two supply destinations, the same problem occurs.

In view of the above-mentioned circumstances, an object of the present invention is to provide a fluid supply system capable of reducing the length of piping and realizing space saving and large capacity of the entire system. [Means of Solving Problems]

The fluid supply system of the present invention is provided with: a header for connecting the two distribution pipes; and a plurality of pumps, which are respectively connected to different positions in the longitudinal direction with respect to the header; The distribution pipes are respectively connected to the headers at positions sandwiching one or two of the pumps in the center in the arrangement order of the plurality of pumps.

The fluid supply method of the present invention is a fluid supply method for supplying a fluid by a fluid supply system. The fluid supply system includes: a header for connecting two distribution pipes; The headers are respectively connected to different positions in the longitudinal direction; it is characterized in that it has: the step of operating more than one aforesaid pump among a plurality of aforesaid pumps; and The fluid is supplied to the header from one or more pumps in operation, and through the header, the fluid is connected to one or two of the pumps respectively connected to the center in the arrangement of the plurality of pumps. The step of supplying the fluid from the distribution pipe at the location of the pump. [Inventive effect]

According to the present invention, it is possible to provide a fluid supply system capable of reducing the length of piping and realizing space saving and large capacity of the entire system.

Hereinafter, some embodiments will be described with reference to the attached drawings. However, the dimensions, materials, shapes, and relative arrangement of components described in the embodiments or shown in the drawings are not intended to limit the scope of the invention, but are merely illustrative examples. For example, expressions representing relative or absolute arrangements such as "toward a certain direction", "along a certain direction", "parallel", "orthogonal", "center", "concentric" or "coaxial", are It is assumed that not only such an arrangement is strictly represented, but also a state of relative displacement by a tolerance, or an angle or distance of such a degree that the same function can be obtained. For example, the expression indicating the state of equality of things such as "identical", "equal" and "homogeneous" assumes not only the state of being exactly equal, but also the existence of tolerance, or the difference in the degree of obtaining the same function status. For example, the expression representing a shape such as a quadrangular shape or a cylindrical shape is assumed not only to indicate a shape such as a quadrangular shape or a cylindrical shape that is geometrically precise, but also to indicate that the same effect can be obtained. Shapes such as uneven parts or chamfered parts. On the other hand, the expression "preparing", "having", "having", "including" or "having" a constituent element is not an exclusive expression that excludes the existence of other constituent elements.

(Constitution of fluid supply system) Hereinafter, the structure of the fluid supply system 1 (1A, 1B, 1C) of several embodiment is demonstrated. Furthermore, the fluid supply system 1 ( 1A, 1B, 1C) is suitable for a pump system in which a plurality of pumps are installed in parallel. Chemical plants, water distribution, exhaust gas purification devices, etc., are examples.

FIG. 1 is a schematic diagram for explaining the outline of a fluid supply system 1 ( 1A) according to an embodiment. FIG. 2 is a schematic diagram for explaining the outline of the fluid supply system 1 ( 1B) of one embodiment. FIG. 3 is a schematic diagram for explaining the outline of the fluid supply system 1 ( 1C) of one embodiment. 1 to 3, the flow of the fluid is indicated by arrows.

As shown in FIGS. 1 to 3 , the fluid supply system 1 (1A, 1B, 1C) includes: a header 3 to which two distribution pipes 2 (2A, 2B, 2C, 2D) are connected; and a plurality of pumps 4 . The plurality of pumps 4 are connected to different positions in the longitudinal direction (left-right direction in FIGS. 1 to 3 ) with respect to the header 3 .

The plurality of pumps 4 are configured to supply, for example, a fluid pumped from a tank or the like (not shown) to the header 3 . The plurality of pumps 4 are preferably of the same type for reasons of maintainability and standardization.

In the header 3, the distribution pipes 2 (2A, 2B, 2C, 2D) are respectively connected to the position of one or two pumps 4 in the center in the arrangement order of the plurality of pumps 4. Here, the term "one or two pumps 4 in the center of the arrangement order" refers to the one pump 4 in the center when the number of the arranged pumps 4 is an odd number. When the number of the pumps 4 is an even number, it refers to the two central pumps 4 . That is, it means that the number of the pumps 4 in the center of the arrangement order is different depending on whether the number of the pumps 4 is odd or even.

For example, FIG. 1 to FIG. 3 show an example in which an even number of pumps 4 are connected to the headers 3 . For this purpose, in FIGS. 1 to 3 , the distribution pipes 2 ( 2A, 2B, 2C, 2D) are connected to the positions where the two pumps 4 are sandwiched in the center.

The so-called "a position where one or two pumps 4 in the center are sandwiched" means not only one or two pumps 4 in the center, but also other pumps 4 may be sandwiched therebetween. For example, in FIG. 1 and FIG. 2 , distribution pipes 2 ( 2A, 2B, 2C, 2D) are connected at positions sandwiching two pumps 4 , respectively. In FIG. 3 , distribution pipes 2 ( 2A, 2B) are connected at positions sandwiching all of the plurality of pumps 4 (eight pumps 4 ), respectively. That is, the distribution pipes 2 ( 2A, 2B) are connected to the headers 3 at positions closer to the outside than the pumps 4 at both ends of the arrangement.

Furthermore, as shown in FIG. 3 , the distribution pipes 2 ( 2A, 2B, 2C, 2D) may be connected to both ends of the header pipe 3 . The two distribution pipes 2 ( 2A, 2B, 2C, 2D) may also branch at the branching portion 5 as shown in FIGS. 1 to 3 .

For example, as shown in FIGS. 1 and 3 , the distribution pipe 2 ( 2A) for supplying the fluid to the supply destination A and the distribution pipe 2 ( 2B) for supplying the fluid to the supply destination B may be Divergence in their respective supply destinations. The two distribution pipes 2 ( 2A, 2B) may be configured to have a plurality of branch parts 5 geodesically from the upstream side to the downstream side, and a part of the fluid may be discharged from the branch parts 5 . 1 and 3, although the distribution pipe 2 (2A) and the distribution pipe 2 (2B) are configured to be discharged from the branch pipe 5 in two directions, they may be discharged in one direction. way constituted.

As shown in FIG. 2 , the distribution pipe 2 ( 2C) for supplying the fluid to the supply destination A and the distribution pipe 2 ( 2D) for supplying the fluid to the supply destination B may be configured as separate supply pipes. The destinations (supply destination A and supply destination B) have one branch portion 5 , and are discharged from the branch portion 5 to a plurality of supply destinations in parallel.

In FIGS. 1 to 3, the two distribution pipes 2 (2A, 2B, 2C, 2D) are used to supply fluids to their respective supply destinations (supply destination A and supply destination B) equally, and either It can be constituted in a way to achieve the same pressure loss, or it can be symmetrical in order to achieve the same flow velocity distribution. In addition, the two distribution pipes 2 ( 2A, 2B, 2C, 2D) are not limited to the structures shown in FIGS. 1 to 3 , and may have structures without the branching portion 5 . That is, the two distribution pipes 2 ( 2A, 2B, 2C, 2D) may be configured to discharge the fluid from the front end toward the respective supply destinations.

Here, the advantages of the configuration of the above-mentioned fluid supply system 1 ( 1A, 1B, 1C) will be described in comparison with the comparative example. FIG. 4 is a schematic diagram for explaining the outline of the fluid supply system 51 of the comparative example. FIG. 5 is a schematic diagram for explaining the outline of the fluid supply system 61 of the comparative example.

As shown in FIG. 4 , in the fluid supply system 51 of the comparative example, a distribution pipe 52 is connected to a header 53 , and the distribution pipe 52 is branched to each supply destination (supply destination A and supply destination B). In this case, a portion of the distribution pipes 5 reaching the respective supply destinations overlaps with the headers 53 . For this reason, only the overlapping portion of the distribution pipe 52 and the header pipe 53 increases the length of the piping.

On the other hand, according to the configuration of the above-mentioned fluid supply system 1 (1A, 1B, 1C), the distance between the supply destinations of the distribution pipes 2 (2A, 2B, 2C, 2D) (supply destination A and supply destination When the distance between the ground and B) is larger than the distance between the connection parts of the header 3 and the distribution pipe 2 (2A, 2B, 2C, 2D), it is usually used as a part of the piping. Configuration. In this case, for example, as shown in FIGS. 1 to 3, the distribution pipes 2 (2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 100%) are respectively connected to the position of one or two sets of pump pump units 4 in the center, as shown in FIG. 1 to FIG. 3 . 2B, 2C, 2D), the length of the piping to reach each supply destination can be shortened by at least a part of the header 3 (interval between the connection parts).

As shown in FIG. 5, in the fluid supply system 61 of the comparative example, the branch pipe 62 is extended so that it may pass through two supply destinations (supply destination A and supply destination B) without branching. In this case, the length of the distribution pipe 62 becomes longer, and the space of the whole system becomes larger. In addition, since the pressure loss accompanying the length of the distribution pipe 62 increases, it is difficult to increase the capacity.

On the other hand, according to the configuration of the above-mentioned fluid supply system 1 (1A, 1B, 1C), since the fluid can be supplied from the two distribution pipes 2 (2A, 2B, 2C, 2D) to the respective supply destinations, the length of the piping is limited. It will be shorter, and the space saving of the whole system can be realized. Moreover, since the pressure loss accompanying the length of the distribution pipe 2 (2A, 2B, 2C, 2D) becomes small, it becomes possible to increase a capacity|capacitance.

Furthermore, since two distribution pipes 2 (2A, 2B, 2C, 2D) are connected to one header 3 in which a plurality of pumps 4 are arranged in parallel, it is advantageous in the case of supplying fluid to two supply destinations, Therefore, the above-mentioned fluid supply system 1 ( 1A, 1B, 1C) adopts such a configuration.

However, compared with the fluid supply system 1A shown in FIG. 1 and the fluid supply system 1B shown in FIG. 2, the fluid supply system 1C shown in FIG. The distribution pipes 2 (2A, 2B) are respectively connected to the outer positions of the pump 4, so the distance between the distribution pipes 2 (2A, 2B) becomes larger. For this reason, the length of the piping that can be shortened can be increased.

In addition, when the fluid is a solid-liquid two-phase flow or a gas-liquid two-phase flow, since the distribution pipes 2 ( 2A, 2B) are connected to the inner side of the arrangement direction than the plurality of pumps 4 , for example, the Fluid retention occurs in the vicinity of the pump 4 or its valve (not shown) in the stopped state, so there is a possibility that the sediment of the slurry may stick and fix in the vicinity of the pump 4 and the valve in the stopped state, or may occur Danger of separation or clogging. In this regard, in the configuration of the fluid supply system 1C shown in FIG. 3 , even if the pumps 4 at both ends of the array are in a stopped state, fluid retention does not easily occur, so such a problem does not easily occur.

(The composition of the header) Here, a preferred configuration in the header 3 of the fluid supply system 1 of one embodiment will be described. FIG. 6 is a view showing a cross section of the header 3 of the fluid supply system 1 according to the embodiment along the direction in which the plurality of pumps 4 are arranged. This figure corresponds to FIG. 3 and shows a case where eight pumps 4 are connected to the header 3 as an example.

In FIG. 6 , a plurality of pumps 4 are connected to different positions (eight longitudinal positions L1, L2, L3, L4, L5, L6, L7, L8) in the longitudinal direction of the header 3, respectively. As shown in FIG. 6 , the positions where the plurality of pumps 4 are connected are symmetrical when viewed from the center position CL in the longitudinal direction of the header 3 in the cross section along the arrangement direction of the plurality of pumps 4 Location. For example, the longitudinal direction position L1 and the longitudinal direction position L8 are symmetrical positions with the center position CL as an axis. Thereby, the difference in the flow rate distribution of the fluids flowing toward the two distribution pipes 2 (2A, 2B) in the header 3 can be reduced, and the difference in the flow rates supplied to the two distribution pipes 2 (2A, 2B) can be reduced.

As shown in FIG. 6 , the header 3 is configured so that the flow passage area increases as it goes to the outside of the arrangement direction of the plurality of pumps 4 (left-right direction in FIG. 6 ). According to such a configuration, the more the pump 4 is reciprocated to the outside of the arrangement direction, the more the supply amount of the fluid from the pump 4 is added, so that the flow rate increases. However, since the flow path area also increases in response to an increase in the flow rate, the unevenness of the flow velocity in the header 3 is reduced. As a result, the unevenness of the piping pressure loss is reduced, and the supply of the fluid to the two distribution pipes 2 (2A, 2B) is stabilized.

In addition, the header 3 is formed in a cross section along the arrangement direction of the plurality of pumps 4, and the first inner wall surface 3a for connecting the distribution pipes 2 (2A, 2B) is linear, and the first inner wall surface 3a is opposed to the first inner wall surface 3a. The second inner wall surface 3b has a stepped shape. Thereby, the lengths of the two distribution pipes 2 (2A, 2B) extending from the linear first inner wall surface 3a can be made uniform, and the back pressure of the two distribution pipes 2 (2A, 2B) can be easily uniformized.

In the cross section along the arrangement direction of the plurality of pumps 4, the stepped shape of the second inner wall surface 3b is preferably a line-symmetric shape with the center position CL in the longitudinal direction as an axis. It is preferable that the stepped shape of the second inner wall surface 3b corresponds to the increase in the flow rate of the fluid supplied from the pumps 4 as the reciprocating outside of the arrangement direction of the plurality of pumps 4 (left-right direction in FIG. 6 ) shape. With such a configuration, it is possible to reduce the difference in pressure loss between the fluids flowing in the header 3 toward the two distribution pipes 2 (2A, 2B), respectively, and to reduce the flow rate supplied to the two distribution pipes 2 (2A, 2B). Difference.

The distribution pipes 2 ( 2A, 2B) are preferably connected to the headers at symmetrical positions when viewed from the center position CL in the longitudinal direction of the headers 3 in a cross section along the direction in which the plurality of pumps 4 are arranged. 3. Thereby, the difference in pressure loss of the fluids flowing toward the two distribution pipes 2 (2A, 2B) in the header 3 can be reduced, and the difference in the flow rates supplied to the two distribution pipes 2 (2A, 2B) can be reduced.

(Specific example of pump start mode) Hereinafter, the activation mode of the pump 4 of the fluid supply system 1 (1A, 1B, 1C) will be described. FIG. 7 is a diagram illustrating an activation mode of the pump 4 of the fluid supply system 1 ( 1A, 1B, 1C) of one embodiment. Furthermore, when operating a plurality of pumps 4, it is preferable to operate the pumps 4 one by one in order to suppress inrush current and voltage fluctuations.

FIG. 7 shows the pumps in the case where eight pumps 4 are connected to the header 3 as in the fluid supply system 1C shown in FIG. 3 , and distribution pipes 2 ( 2A, 2B) are connected to both ends of the header 3 . Pu 4 boot mode. These start-up modes refer to start-up modes in which only a part of the pumps 4 of the plurality of pumps 4 are operated according to the needs of the supply destination of the distribution pipes 2 ( 2A, 2B).

FIG. 7 shows the mode number, the start mode of the pump 4 corresponding to the mode number, and whether it is allowed or not. The permission indicates which one of ○ (activation mode that can be allowed) and × (activation mode that should be avoided). In FIG. 7, the startup mode of the pumps 4 is a state in which a plurality of pumps 4 are arranged in order, and the respective pumps are schematically indicated by black ○ (operation) or white ○ (stop). The operating status of Pu 4. These start-up modes refer to information indicating whether each of the plurality of pumps 4 should be operated. The dotted line in the center of the activation mode of the pumps 4 represents the center in the arrangement order of the plurality of pumps 4 .

Furthermore, in this example, as a supply destination, it is a precondition that four pumps out of the eight pumps 4 are required to operate, and preferably five out of the eight pumps 4 are required. The operation of the pump is a prerequisite. FIG. 7 illustrates a start-up mode in which five of the eight pumps 4 operate and a start-up mode in which six of the eight pumps 4 operate. For this reason, the activation mode illustrated in FIG. 7 satisfies the preconditions.

First, the mode number 1 is set as the activation mode to be avoided. This is because the balance of the distribution of the pump 4 in the operating state in FIG. 7 is poor, and the balance of the pressure loss of the fluid at both ends of the steering header 3 is also poor. In other words, the balance of the flow rates of the fluids supplied to the two distribution pipes 2 ( 2A, 2B) deteriorates. Mode numbers 2, 5, 6, 7, and 13 are also set as activation modes to be avoided for the same reason.

On the other hand, the mode number 10 is set as the activation mode to be avoided for a reason different from that of the mode numbers 1, 2, 5, 6, 7, and 13. As shown in FIG. 7 , in the startup mode of the pump 4 corresponding to the mode number 10, the two pumps 4 located in the center are in a stopped state, and the number of the pumps 4 on the left and right is the same. At the time of starting, air may be accumulated in the header 3 in some cases, and in the starting mode of the pump 4 such as the mode number 10, there is a possibility that the air may remain at the center position. In this case, there is a fear that the operation may become unstable due to the generation of voids or air bubbles in the vicinity of the center of the header 3 or the oscillation.

The activation modes of the pump 4 corresponding to the mode numbers 3, 4, 8, 9, 11, and 12 are set to allowable activation modes. This is because the phenomenon of the start-up mode that should be avoided as described above does not easily occur. Furthermore, although FIG. 7 only shows the start-up mode in the case where two or three pumps 4 are in a stopped state in parallel, the start-up mode is not limited to these.

Here, an example of the startup mode of the pump 4 recommended for initial startup will be described. FIG. 8 is a diagram illustrating an activation mode of the pump 4 of the fluid supply system 1 ( 1A, 1B, 1C) of one embodiment. In the examples of these two startup modes, the pumps 4 in the running state and the pumps 4 in the stopped state are alternately arranged, and the central dotted line in the arrangement order of the eight pumps 4 is used as the axis, and the running state is to become asymmetric.

The number of operating pumps 4 is the same on one side (for example, the right side) and the other side (for example, the left side) of the dotted line in the center. However, since these arrangements are asymmetrical, the pressure loss of the fluid that turns to one side and the fluid that turns to the other side are different, so even if there is air in the center at the time of initial start-up, the pressure is still directed toward the flow in the direction with less loss. For this reason, voids or air bubbles are less likely to remain in the center.

Furthermore, in these start-up modes, since the four pumps 4 operate, the minimum prerequisite for the operation of the four pumps is satisfied. However, since it is preferable to operate five pumps 4, it is preferable to operate more pumps 4. Therefore, one or more pumps 4 may be selected from among the four pumps 4 in the stopped state and additionally operated. In this case, based on the total operation time (accumulated operation time) of each pump 4, the pump 4 with a shorter total operation time may be preferentially selected and operated. By such an operation method, the unevenness of the total operation time of each of the plurality of pumps 4 can be reduced.

Furthermore, when the start-up modes of the mode number X and the mode number Y are compared, it can be understood that the operation state and the stop state are opposite. For this reason, the one with the shorter total operation time among the mode number X and the mode number Y may be selected, and the pump 4 may be operated according to the activation mode. By such an operation method, the unevenness of the total operation time of each of the plurality of pumps 4 can be reduced.

The start-up mode of the pump 4 recommended for such initial start-up may also consider the recommended start-up sequence. For example, in the case of the mode number X, it is preferable to operate the fifth pump 4 from the left first, then operate the third pump 4 from the left, and then operate the seventh pump 4 from the left The pump 4 runs, and finally the first pump 4 from the left runs. In the case of the mode number Y, it is preferable to use the pump 4 in the order of the fourth from the left, the sixth from the left, the second from the left, and the eighth from the left. run. Thus, it is preferable to operate the pump 4 in an order closer to the center position of the arrangement order. This is to improve the balance of the flow rates of the fluids discharged to the two distribution pipes 2 (2A, 2B).

FIG. 9 is a diagram illustrating an activation mode of the pump 4 of the fluid supply system 1 ( 1A, 1B, 1C) of one embodiment. In FIG. 9, the startup mode of the pump 4 in the case where the number of the pumps 4 connected to the header 3 is not eight is exemplified.

First, when looking at an example of the start-up mode of the pumps 4 in the case where the number of the pumps 4 connected to the header 3 is nine, the three pumps 4 in the center are in a stopped state. The pumps 4 on the left and right of these pumps 4 are in an operating state. Such an activation mode is set as an activation mode to be avoided for the same reason as the mode number 10 shown in FIG. 7 (the problem of remaining voids or air bubbles in the center).

On the other hand, when looking at an example of the start-up mode of the pumps 4 when the number of the pumps 4 connected to the header 3 is ten, the three pumps 4 in the center are in a stopped state. The pumps 4 on the left and right of these pumps 4 are in an operating state. However, since the three pumps 4 on the left are in the operating state, the four pumps 4 on the right are in the operating state, so there is a difference between the left and right. In this case, even if there is air in the center, the fluid tends to flow toward the left. Moreover, since the difference is only one pump 4, and the difference between the left and right is not too large, the balance of the flow rates of the fluids supplied to the two distribution pipes 2 (2A, 2B) is not likely to deteriorate excessively. Such an activation mode is set as an allowable activation mode.

(Example of a better pump startup mode) When looking at the example of the activation pattern of the pump 4 illustrated in FIGS. 7 to 9 , it becomes clear whether the regularity of the activation pattern is allowable or not. For this reason, in the case where more than five pumps 4 are connected to the header 3, a better start-up pattern of the pumps 4 can be derived. Hereinafter, a preferred start-up mode of the pumps 4 in the case where five or more pumps 4 are connected to the header 3 will be described.

It is preferable to operate with more than half of one or more pumps 4 connected to one side than the center of the arrangement order of the plurality of pumps 4, and to be connected to one or more pumps 4 of the other side. More than half of the operation mode is used to control the number of pumps 4 in operation. Thereby, the balance of the flow rate of the fluid discharged to the two distribution pipes 2 (2A, 2B) can be improved.

For the header 3, it is preferable that the number of the pumps 4 connected to one side is the same as the number of the pumps 4 connected to the other side than the center of the arrangement order of the plurality of pumps 4, and avoid One or two pumps 4 in the center of the arrangement sequence are in a stopped start mode to control the running number of the pumps 4 . In this case, it is possible to reduce the risk of the operation becoming unstable due to the generation of voids or air bubbles in the vicinity of the center of the header 3 or the oscillation thereof. Furthermore, the central one or two pumps 4, as mentioned above, means the case where the central pump 4 is one and two by the odd or even number of the plural pumps 4 being classified. table situation.

When the fluid supply system 1 is started (especially at the initial start), it is preferable to operate the pumps 4 in order from the pump 4 closer to the center of the arrangement sequence of the plurality of pumps 4 to be operated. Furthermore, in the example shown in FIG. 8 , the two or more pumps 4 to be operated are four pumps 4 . In this case, it is possible to reduce the risk of the operation becoming unstable due to the generation of voids or air bubbles in the vicinity of the center of the header 3 or the oscillation thereof.

When the fluid supply system 1 is started (especially at the initial start-up), it is preferable to operate one pump 4 at first, and then alternately operate the pumps 4 on both sides in the order from the pump after it has been operated. run. For example, in the mode number X shown in FIG. 8 , the fifth pump 4 from the left is operated first, and then the pump 4 ( For example, the third pump 4 from the left is operated, and then the pump 4 on the other side of the sequence (eg, the seventh pump from the left) is operated. In this way, the pump 4 located in the left-right direction as viewed from the pump 4 initially operated may be operated alternately. Thereby, the balance of the flow rate of the fluid discharged to the two distribution pipes 2 (2A, 2B) can be improved.

The plurality of start-up modes preferably include: a first start-up mode in which only the pumps of the odd-numbered pump in the order of the plurality of pumps 4 are operated; and a second start-up mode in which only the plurality of pumps are operated The even-numbered pump 4 in the order of the pumps 4 operates; and based on the total operation time of the plurality of pumps 4 , any one of the first start-up mode and the second start-up mode is selected. For example, in the example shown in FIG. 8, when the arrangement order is from left to right, the mode number X corresponds to the first activation mode, and the mode number Y corresponds to the second activation mode.

In this case, the total operating time of the plurality of pumps 4 can be leveled, and the number of repairs or exchanges of the pumps 4 under the warranty can be reduced. In addition, even in the case where one of the odd-numbered and even-numbered units has been selected, the balance of the number of operating units of the pumps 4 connected to the header 3 is good, so that the discharge to the two distribution pipes can be improved. 2 (2A, 2B) is the balance of the flow rate of the fluid.

Such a start-up mode of the pumps 4 is suitable for the following cases: according to the needs of the supply destination of the distribution pipes 2 (2A, 2B), only a part of the pumps 4 among the plurality of pumps 4 are operated, and The supply of fluid is carried out by means of these pumps 4 . For example, when the fluid supply system 1 is started, any one of a plurality of start-up modes indicating whether or not each of the plurality of pumps 4 should be operated may be selected, and based on the selected start-up mode, the Two or more pumps 4 in operation operate. In this case, since the number of operating pumps 4 is controlled according to the needs of the supply destination, efficient equipment operation can be performed.

Based on the total operation time of each pump 4, a start-up mode indicating whether or not each of the plurality of pumps 4 should be operated may be determined, and the pump to be operated may be determined based on the determined start-up mode. 4 run. In this case, for example, when the number of operating units of a plurality of pumps 4 is increased, the pump 4 with a short total operating time can be preferentially selected and operated, or the pump with a long total operating time can be selected and operated. 4 Stop. Also, for example, one or more start-up modes that are allowed for each number of units to be operated may be set, and from these, a start-up mode that activates the pump 4 with a short total operation time may be selected. By such operation control and operation of the pumps 4, the total operation time of the plurality of pumps 4 can be leveled, and the frequency of repairs, parts replacement, and the like can be reduced.

(Flow of the fluid supply method) Hereinafter, a fluid supply method according to an embodiment will be described. FIG. 10 is a flowchart showing the procedure of the fluid supply method in one embodiment. This fluid supply method is a method of supplying a fluid by a fluid supply system 1 including: a header 3 to which two distribution pipes 2 (2A, 2B, 2C, 2D) are connected; and a plurality of The stage pumps 4 are connected to different positions in the longitudinal direction with respect to the header 3, respectively. The method can be realized by manual operation or by having CPU (Central Processing Unit), ROM (Read Only Memory), RAM (Random Access Memory; random access memory) ) and other computers (computer) read the program (program) and automatically control the operating state of the pump 4 to achieve.

First, as shown in FIG. 10, the activation mode of the plurality of pumps 4 is determined (step S1). Based on the determined activation mode, one or more pumps 4 among the plurality of pumps 4 are operated (step S2). Next, fluid is supplied to the header 3 from one or more pumps 4 in operation, and through the header 3, one or two pumps connected to the center in the arrangement of the plurality of pumps 4 are sandwiched between them. The distribution pipes 2 (2A, 2B, 2C, 2D) at each of the positions 4 are supplied with fluid (step S3).

In the case where all of the plurality of pumps 4 are operated, step S1 may be omitted. In step S2, only a part of the pumps 4 among the plurality of pumps may be operated according to the needs of the supply destination of the distribution pipes 2 (2A, 2B, 2C, 2D). In step S1, based on the total operation time of each pump 4, the starting mode indicating whether or not each of the plurality of pumps 4 should be operated may be determined. In step S1, the activation mode can also be determined or selected as in the above-mentioned preferred activation mode of the pump.

The present invention is not limited to the above-described embodiment, and includes a modified form of the above-described embodiment, or an appropriate combination of these forms.

(induction) The contents described in each of the above-mentioned embodiments can be grasped as follows, for example.

(1) A fluid supply system (1) according to an embodiment of the present invention is provided with: a header (3) for connecting the two distribution pipes (2); and a plurality of pumps (4), which are respectively connected to different positions in the longitudinal direction with respect to the header (3); In the aforementioned header (3), the aforementioned distribution pipes (2) are respectively connected to the position between one or two aforementioned pumps (4) in the center of the arrangement sequence of the aforementioned plurality of pumps (4).

According to the configuration described in the above (1), when the distance between the supply destinations of the distribution pipes (2) is larger than the distance between the connection parts between the headers (3) and the distribution pipes (2), usually A configuration such as utilizing the distance between the connection portions as a part of the piping is adopted. In this case, since the distribution pipes (2) are respectively connected to one or two pumps in the center of the arrangement of the plurality of pumps (4), at least one of the headers (3) can be used. Partially shorten the length of piping to reach each supply destination.

In addition, since the fluid can be supplied from the two distribution pipes (2) to the respective supply destinations, the length of the piping can be shortened, and the space saving of the entire system can be achieved. In addition, since the pressure loss accompanying the length of the distribution pipe (2) is reduced, the capacity can be increased.

(2) In some embodiments, in the configuration described in (1) above, the distribution pipe (2) is connected at a position outside the pump (4) at both ends of the arrangement order. in the aforementioned header (3).

According to the configuration described in the above (2), since the distribution pipes (2) are respectively connected to the outer positions of the pumps (4) at both ends among the plurality of pumps (4), the distribution pipes (2) ) will be farther apart from each other. For this reason, the length of the piping that can be shortened can be increased. In addition, when the fluid is a solid-liquid two-phase flow or a gas-liquid two-phase flow, since the distribution pipe (2) is connected to the inner side of the arrangement direction than the plurality of pumps (4), for example, in the Fluid retention occurs near the pump (4) in the stopped state or its valve (not shown), so there is a possibility that the sediment of the slurry will stick and fix near the pump (4) and the valve in the stopped state, or may occur. Danger of separation or clogging. In this regard, in the configuration described in the above (2), even if the pumps (4) at both ends of the array are in a stopped state, fluid retention is unlikely to occur, so such a problem is unlikely to occur.

(3) In some embodiments, in the configuration described in the above (1) or (2), the header (3) is located on the outer side of the arrangement direction of the reciprocating number of the pumps (4) It is constituted in such a way that the area of the flow passage increases.

According to the configuration described in the above (3), the more the pump (4) is reciprocated to the outside of the arrangement direction, the more the supply amount of the fluid from the pump (4) is added, so that the flow rate increases. However, since the flow path area also increases in response to the increase in the flow rate, the unevenness of the flow velocity in the header (3) is reduced. As a result, the unevenness of the piping pressure loss is reduced, and the supply of the fluid to the two distribution pipes (2) is stabilized.

(4) In some embodiments, in the configuration described in any one of the above (1) to (3), the header (3) is arranged along the line between the plurality of pumps (4). In the cross section in the arrangement direction, the first inner wall surface (3a) for connecting the distribution pipes (2) is linear, and the second inner wall surface (3b) facing the first inner wall surface (3a) is stepped.

According to the configuration described in the above (4), the lengths of the two distribution pipes (2) extending from the linear first inner wall surface (3a) can be made the same, and the back pressure of the two distribution pipes (2) can be easily uniformized .

(5) In some embodiments, in the configuration described in the above (4), in the cross section along the arrangement direction of the plurality of pumps (4), the second inner wall surface (3b) has the The stepped shape is a line-symmetrical shape.

According to the configuration described in the above (5), the difference in pressure loss between the fluids flowing in the header (3) toward the two distribution pipes (2) can be reduced, and the flow rate supplied to the two distribution pipes (2) can be reduced. Difference.

(6) In some embodiments, in the configuration described in any one of the above (1) to (5), the distribution pipe (2) is connected along a plurality of the pumps (4) In the cross section in the arrangement direction, the headers (3) are connected to the headers (3) at symmetrical positions when viewed from the center in the longitudinal direction of the headers (3).

According to the configuration described in the above (6), the difference in pressure loss between the fluids flowing toward the two distribution pipes (2) in the header (3) can be reduced, and the flow rate supplied to the two distribution pipes (2) can be reduced. Difference.

(7) In some embodiments, in the configuration described in any one of (1) to (6) above, the plurality of pumps (4) are arranged along the plurality of pumps (4). 4) In the cross section in the arrangement direction, the headers (3) are connected to the headers (3) at symmetrical positions when viewed from the center in the longitudinal direction of the headers (3).

According to the configuration described in the above (7), the difference in the flow rate distribution of the fluids flowing toward the two distribution pipes (2) in the header (3) can be reduced, and the flow rate supplied to the two distribution pipes (2) can be reduced. Difference.

(8) A fluid supply method according to an embodiment of the present invention is a fluid supply method for supplying a fluid by means of a fluid supply system (1), the fluid supply system (1) being provided with: a header (3) for supplying a fluid Two distribution pipes (2) are connected; and a plurality of pumps (4) are respectively connected to different positions in the longitudinal direction with respect to the header (3); and have: the step of operating more than one aforesaid pump (4) among a plurality of aforesaid pumps (4); and The fluid is supplied to the header (3) from one or more pumps (4) in operation, and through the header (3), the fluid is connected to an array of pumps (4) sandwiched between the plurality of pumps (4). The step of supplying the fluid to the distribution pipe (2) at the position of the central one or two pumps (4) in the sequence.

According to the method described in the above (8), a fluid supply method having the same advantages as the fluid supply system (1) described in the above (1) can be provided.

(9) In several embodiments, in the method described in the above (8), and comprising: The step of operating only a part of the aforementioned pumps (4) among the plurality of aforementioned pumps (4) in response to the needs of the supply destination of the aforementioned distribution pipe (2); and The step of supplying the fluid is performed by a part of the pump (4) in operation.

According to the method described in the above (9), since the number of pumps (4) in operation is controlled according to the needs of the supply destination, efficient equipment operation can be performed.

(10) In several embodiments, in the method described in the above (9), and comprising: The step of determining a start-up mode indicating whether each of the plurality of aforesaid pumps (4) should be operated based on the aggregate operating time of each of the aforementioned pumps (4); and A step of operating the pump (4) to be operated based on the determined start-up mode.

According to the method described in the above (10), for example, when the number of operating units of a plurality of pumps (4) is increased, the pump (4) with a shorter total operating time can be preferentially selected and operated, Alternatively, the pump (4) whose total operating time is long is stopped. Also, for example, one or more start-up modes that are allowed for each number of units to be operated may be set, and from these, a start-up mode that activates the pump (4) with a short total operation time may be selected. By controlling the operation of the pumps (4) in this way, the total operation time of the plurality of pumps (4) can be leveled, and the frequency of warranty repairs, parts replacement, etc. can be reduced.

(11) In some embodiments, in the method described in the above (9) or (10), the header (3) is connected further than the center of the arrangement order of the plurality of pumps (4). The number of the aforementioned pumps (4) on one side is the same as the number of the aforementioned pumps (4) connected to the other side, and one or two aforementioned pumps (4) avoiding the center of the aforementioned arrangement order are The number of operating units of the aforementioned pump (4) is controlled by means of the stop start mode.

According to the method described in the above (11), it is possible to reduce the risk of the operation becoming unstable due to the generation of voids or air bubbles in the vicinity of the center of the header (3) or the oscillation thereof.

(12) In some embodiments, in the method described in any one of the above (9) to (11), the plurality of pumps (4) are connected to one side further than the center in the order of arrangement More than half of one or more of the above-mentioned pumps (4) are operated, and more than half of the above-mentioned one or more pumps (4) connected to the other side are operated to control the above-mentioned pump (4). 4) The number of running units.

According to the method described in the above (12), the balance of the flow rates of the fluids discharged to the two distribution pipes (2) can be improved.

(13) In several embodiments, in the method described in any one of the above (9) to (12), and comprising: The step of selecting any one of a plurality of start-up modes indicating whether each of the plurality of aforesaid pumps (4) should be operated upon startup of the aforementioned fluid supply system (1); and A step of operating two or more of the aforementioned pumps (4) that should be operated based on the aforementioned startup mode selected; In the above-mentioned step of operating the pump (4), the pump (4) is operated in order from the center of the arrangement sequence of the plurality of the above-mentioned pumps (4).

According to the method described in the above (13), it is possible to reduce the risk of the operation becoming unstable due to the generation of voids or air bubbles in the vicinity of the center of the header (3) or the oscillation thereof.

(14) In several embodiments, in the method described in any one of the above (9) to (13), and comprising: The step of selecting any one of a plurality of start-up modes indicating whether each of the plurality of aforesaid pumps (4) should be operated upon startup of the aforementioned fluid supply system (1); and A step of operating two or more of the aforementioned pumps (4) that should be operated based on the aforementioned startup mode selected; In the above-mentioned operation step, one of the above-mentioned pumps (4) is initially operated, and then the above-mentioned pumps (4) on both sides in the above-mentioned arrangement sequence are alternately operated from the above-mentioned pump (4) after operation. Pu (4) runs.

According to the method described in the above (14), the balance of the flow rates of the fluids discharged to the two distribution pipes (2) can be improved.

(15) In several embodiments, in the method described in any one of the above (9) to (14), and comprising: The step of selecting any one of a plurality of start-up modes indicating whether each of the plurality of aforesaid pumps (4) should be operated upon startup of the aforementioned fluid supply system (1); and A step of operating two or more of the aforementioned pumps (4) that should be operated based on the aforementioned startup mode selected; The plurality of aforementioned start-up modes include: a first start-up mode for operating only the odd-numbered pumps (4) in the order of the plurality of aforementioned pumps (4); and a second start-up mode for operation is to operate only the even-numbered pump (4) in the order of the plurality of pumps (4); In the above-mentioned selecting step, any one of the above-mentioned first start-up mode and the above-mentioned second start-up mode is selected based on the total operation time of a plurality of the above-mentioned pumps (4).

According to the method described in the above (15), the total operating time of a plurality of pumps (4) can be leveled, and the number of repairs or replacements of the pumps (4) under warranty can be reduced. In addition, even in the case where one of the odd-numbered and even-numbered units is selected, the balance of the number of pumps (4) connected to the header (3) in operation is good, so that the discharge can be improved. Balance of fluid flow to the two distribution pipes (2).

1, 1A, 1B, 1C, 51, 61: Fluid Supply System 2, 2A~2D, 52, 62: Distribution tube 3,53: Header 3a: First inner wall surface 3b: Second inner wall surface 4: Pump 5: Branches A, B: Supply destination CL: Central position L1~L8: Longitudinal position

1 is a schematic diagram for explaining the outline of a fluid supply system according to an embodiment. 2 is a schematic diagram for explaining the outline of a fluid supply system according to an embodiment. 3 is a schematic diagram for explaining the outline of a fluid supply system according to an embodiment. 4 is a schematic diagram for explaining the outline of the fluid supply system of the comparative example. 5 is a schematic diagram for explaining the outline of the fluid supply system of the comparative example. Fig. 6 is a view showing a cross section of a header of a fluid supply system according to an embodiment along the arrangement direction of a plurality of pumps. [ Fig. 7] Fig. 7 is a diagram illustrating a starting pattern of a pump in a fluid supply system according to an embodiment. [ Fig. 8] Fig. 8 is a diagram illustrating an activation mode of a pump of a fluid supply system according to an embodiment. [ Fig. 9] Fig. 9 is a diagram illustrating an activation mode of a pump of a fluid supply system according to an embodiment. 10 is a flowchart (flowchart) showing the procedure of the fluid supply method in one embodiment.

1,1A: Fluid Supply System

2, 2A, 2B: Distribution tube

3: Header

4: Pump

5: Branches

A, B: Supply destination

Claims (12)

A fluid supply system is characterized by comprising: a header for connecting two distribution pipes; and a plurality of pumps, which are respectively connected to different positions in the longitudinal direction with respect to the header; The pipe is connected to the distribution pipe at the position of sandwiching the center one or two of the above-mentioned pumps in the arrangement sequence of the above-mentioned plurality of pumps; and the above-mentioned header pipes are connected along the plurality of the above-mentioned pumps. In the cross section in the arrangement direction, the first inner wall surface for connecting the distribution pipes is linear, and the second inner wall surface facing the first inner wall surface is stepped. The fluid supply system of claim 1, wherein the distribution pipe is connected to the header at a position outside the pump at both ends of the arrangement. The fluid supply system according to claim 1 or 2, wherein the header is configured such that the flow path area increases as it goes to the outside of the arrangement direction of the plurality of pumps. The fluid supply system according to claim 1 or 2, wherein, in a cross section along an arrangement direction of the plurality of pumps, the stepped shape of the second inner wall surface is a line-symmetric shape. The fluid supply system according to claim 1 or 2, wherein the distribution pipe is symmetric when viewed from the center of the longitudinal direction of the header in a cross-section along the arrangement direction of the plurality of pumps. The location is connected to the aforementioned header. The fluid supply system according to claim 1 or 2, wherein the plurality of said pumps are located in a cross section along the arrangement direction of the plurality of said pumps, when viewed from the center of the longitudinal direction of the said header. Symmetrical locations are connected to the aforementioned headers. A fluid supply method is a fluid supply method for supplying a fluid by a fluid supply system, the fluid supply system is provided with: a header for connecting two distribution pipes; and a plurality of pumps, which are relative to the header They are respectively connected at different positions in the longitudinal direction; and the headers are connected in a cross section along the arrangement direction of a plurality of the pumps, and the first inner wall surface for connecting the distribution pipes is linear, and the A second inner wall surface whose inner wall surfaces face each other has a stepped shape; it is characterized by comprising: a step of operating one or more of the plurality of said pumps; The pump supplies the fluid to the headers, and through the headers, supplies the fluid to the distribution pipes respectively connected to the center one or two of the pumps in the arrangement of the plurality of pumps. and according to the needs of the supply destination of the distribution pipe, the step of operating only a part of the pumps among the plurality of pumps; and the supply of the fluid is performed by a part of the pumps in operation step; for the aforementioned headers, from the center of the arrangement order of a plurality of the aforementioned pumps The number of the aforementioned pumps connected to one side is the same as the number of the aforementioned pumps connected to the other side, and one or two of the aforementioned pumps that avoid the center of the aforementioned arrangement sequence are in one of the start-up modes that are stopped. way to control the number of operating units of the aforementioned pumps. The fluid supply method of claim 7, further comprising: a step of determining an activation mode indicating whether each of the plurality of pumps should be operated based on the total operating time of each of the pumps; and based on A step of operating the pump to be operated by the determined start-up mode. A fluid supply method is a fluid supply method for supplying a fluid by a fluid supply system, the fluid supply system is provided with: a header for connecting two distribution pipes; and a plurality of pumps, which are relative to the header They are respectively connected at different positions in the longitudinal direction; and the headers are connected in a cross section along the arrangement direction of a plurality of the pumps, and the first inner wall surface for connecting the distribution pipes is linear, and the A second inner wall surface whose inner wall surfaces face each other has a stepped shape; it is characterized by comprising: a step of operating one or more of the plurality of said pumps; The pump supplies the fluid to the header, and through the header, the pair are respectively connected before the position of the center one or two of the pumps in the arrangement order of the plurality of pumps. The step of supplying the fluid from the distribution pipe; and the step of operating only a part of the pumps in the plurality of the pumps according to the needs of the supply destination of the distribution pipe; and by using a part of the pumps in operation , carry out the step of supplying the aforementioned fluid; starting from the center of the arrangement order of the plurality of the aforementioned pumps, more than half of the aforementioned pumps connected to one or more of the one side are operated and connected to the one of the other side. More than half of the above-mentioned pumps are operated to control the number of operating units of the above-mentioned pumps. A fluid supply method is a fluid supply method for supplying a fluid by a fluid supply system, the fluid supply system is provided with: a header for connecting two distribution pipes; and a plurality of pumps, which are relative to the header They are respectively connected at different positions in the longitudinal direction; and the headers are connected in a cross section along the arrangement direction of a plurality of the pumps, and the first inner wall surface for connecting the distribution pipes is linear, and the A second inner wall surface whose inner wall surfaces face each other has a stepped shape; it is characterized by comprising: a step of operating one or more of the plurality of said pumps; The pump supplies the fluid to the headers, and through the headers, supplies the fluid to the distribution pipes respectively connected to the center one or two of the pumps in the arrangement of the plurality of pumps. steps; and according to the needs of the supply destination of the aforementioned distribution pipe, only make the front The step of operating a part of the aforementioned pumps among the pumps; and the step of supplying the aforementioned fluid by a part of the aforementioned pumps in operation; The step of whether or not each unit of Urao should operate any one of a plurality of start-up modes; and the step of operating the above-mentioned two or more pumps that should be operated based on the above-mentioned start-up mode selected; in the above-mentioned order In the operation step, the pumps are operated in order from the pump closer to the center of the arrangement sequence of the plurality of pumps. A fluid supply method is a fluid supply method for supplying a fluid by a fluid supply system, the fluid supply system is provided with: a header for connecting two distribution pipes; and a plurality of pumps, which are relative to the header They are respectively connected at different positions in the longitudinal direction; and the headers are connected in a cross section along the arrangement direction of a plurality of the pumps, and the first inner wall surface for connecting the distribution pipes is linear, and the A second inner wall surface whose inner wall surfaces face each other has a stepped shape; it is characterized by comprising: a step of operating one or more of the plurality of said pumps; The pump supplies the fluid to the headers, and through the headers, supplies the fluid to the distribution pipes respectively connected to the center one or two of the pumps in the arrangement of the plurality of pumps. steps; and In response to the needs of the supply destination of the distribution pipe, the step of operating only a part of the above-mentioned pumps among the plurality of the above-mentioned pumps; and the step of supplying the above-mentioned fluid by a part of the above-mentioned pumps in operation; and comprising: when the fluid supply system is activated, a step of selecting any one of a plurality of activation modes indicating whether or not each of the plurality of pumps should be operated; and based on the selected activation mode The step of operating two or more of the aforementioned pumps in operation; in the aforementioned step of operating them, one of the aforementioned pumps is initially operated, and thereafter, the aforementioned pumps are operated alternately from the aforementioned pump. The aforementioned pump runs on both sides of the sequence. A fluid supply method is a fluid supply method for supplying a fluid by a fluid supply system, the fluid supply system is provided with: a header for connecting two distribution pipes; and a plurality of pumps, which are relative to the header They are respectively connected at different positions in the longitudinal direction; and the headers are connected in a cross section along the arrangement direction of a plurality of the pumps, and the first inner wall surface for connecting the distribution pipes is linear, and the A second inner wall surface whose inner wall surfaces face each other has a stepped shape; it is characterized by comprising: a step of operating one or more of the plurality of said pumps; Pu supplies the aforesaid to the aforesaid headers The step of supplying the fluid to the distribution pipes respectively connected to the center one or two of the pumps in the arrangement of the plurality of pumps through the headers; The step of operating only a part of the said pumps among the plurality of said pumps as required by the supply destination of the piping; and the step of supplying the said fluid by the part of the said pumps in operation; and comprising: When the above-mentioned fluid supply system is started, the step of selecting any one of a plurality of start-up modes indicating whether or not each of the plurality of the above-mentioned pumps should be operated; The step of operating the two or more pumps; the plurality of startup modes include: a first startup mode in which only the odd-numbered pumps in the order of the plurality of the pumps are operated; The second startup mode is to operate only the even-numbered pump in the sequence of the plurality of pumps; the selection step is to select the first startup mode based on the total operating time of the plurality of pumps and either of the aforementioned second activation modes.

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