KR102097652B1 - Double suction volute pump with improved mechanical seal durability - Google Patents

Abstract

According to the present specification, disclosed is a pump including: a casing connected to a suction pipe and a discharge pipe; a shaft for rotating an impeller within the casing; and a sealing space formed in the casing so that a sealing member for reducing leakage of fluid suctioned through the suction pipe between the casing and the shaft can be placed, wherein a supply pipe for supplying the fluid is connected to the sealing space to reduce the leakage of the suctioned fluid through the sealing member.

Description

Double suction volute pump with improved mechanical seal durability

The present invention relates to a fluid pump with increased durability of the sealing member.

Widely used for supplying agricultural water in adjacent areas such as rivers, rivers, and valleys, the dual suction volute pump for agricultural water is used widely because it has a good pump efficiency and easy disassembly and inspection.

However, when it rains in a river or river, turbid water naturally flows. Due to the lack of water in the severe dry season, foreign substances such as soil mixed with fine sand or muddy water are sucked into the pump by the suction power of the strong pump. Accordingly, foreign matter is stuck in the gland packing provided on both sides of the pump shaft.

At this time, in particular, when sand is caught in the grand packing, the shaft protection sleeve is worn out due to friction due to the rotational force of the motor pump, and the air is sucked and thus cannot function as a sealing, so it is often impossible to maintain the vacuum in the initial pump. In severe cases, the damage caused by friction due to the inflow of foreign matter is also caused.

Since the positive suction volute pump for agricultural water naturally absorbs a lot of foreign substances, it is necessary to frequently replace the grand packing, and there is a problem that the pump manager must reside in the field and operate the pump as a matter of manually replacing the grand packing.

Publication Patent Publication No. 10-2011-0088615 (2011.08.04.)

In this specification, an efficient method for lowering the wear degree of the sealing member is proposed.

The pump according to an embodiment for solving the above problems includes a suction pipe and a casing connected to the discharge pipe; A shaft for rotating the impeller within the casing; And a sealing space formed in the casing so that a sealing member for reducing a degree of leakage of the suction fluid sucked through the suction pipe between the casing and the shaft is located, and the sealing space includes the sealing fluid being the sealing member. It is connected to a supply pipe supplying a supply fluid to the sealing space to reduce the degree of leakage through, the supply fluid supplied from the supply pipe to the sealing space is discharged to the discharge pipe together with the suction fluid.

The foreign matter removed fluid may be supplied to the sealing space through the supply pipe. The supply pipe may be connected to the discharge pipe to supply the discharge fluid discharged to the discharge pipe to the sealing space. The supply pipe may include a filter for removing foreign matter from the supply fluid supplied to the sealing space.

The pump may further include a leak detector for sensing fluid leaking from the sealing member. Furthermore, the leak detection unit may further include a communication unit that transmits whether the fluid leaks to an external terminal when detecting a leak of fluid exceeding a preset leak amount from the sealing member.

According to the technical matters described in the present specification, the wear degree of the sealing member in the pump is significantly lowered, thereby providing an effect of resolving the problem that the pump manager must reside near the pump to replace the sealing member.

In addition, by determining the leakage of the fluid due to the damage of the sealing member with a sensor, and providing the user with a leak of the fluid remotely, it provides an effect that allows the pump manager to remotely manage the pump.

1 is a view showing an embodiment of the positive suction pump.
2 is a view showing a positive suction pump according to an embodiment of the present invention.
3 and 4 is a view showing a cross-sectional view of the positive suction pump according to an embodiment of the present invention.
5 is a view showing an application example of a positive suction pump according to an embodiment of the present invention.
6 is a block diagram showing a pump management system 10 according to an embodiment of the present invention.

The following is merely illustrative of the principles of the invention. Therefore, those skilled in the art may implement various principles included in the concept and scope of the invention and implement the principles of the invention, although not explicitly described or illustrated in the specification. In addition, all conditional terms and examples listed herein are intended to be understood in principle only for the purpose of understanding the concept of the invention, and should be understood as not limited to the examples and states specifically listed in this way. .

The above objects, features, and advantages will become more apparent through the following detailed description in connection with the accompanying drawings, and accordingly, those skilled in the art to which the present invention pertains can easily implement the technical spirit of the invention. .

The terms "first," "second," "third," and "fourth," in the specification and claims, if any, are used to distinguish between similar elements, but not necessarily in a specific sequence. Or used to describe the order of occurrence. It will be understood that the terms so used are compatible under appropriate circumstances such that the embodiments of the invention described herein can operate in sequences other than those illustrated or described herein, for example. Likewise, where the method is described as including a series of steps, the order of such steps presented herein is not necessarily the order in which such steps may be performed, and any described steps may be omitted and / or here Any other steps not described may be added to the method.

In addition, the terms "left", "right", "front", "back", "upper", "bottom", "above", "below", etc. in the specification and claims are used for explanation, It is not necessarily to describe the constant relative position. It will be understood that the terms so used are compatible under appropriate circumstances such that the embodiments of the invention described herein can operate in other directions than shown or described herein, for example. The term "connected" as used herein is defined as being connected directly or indirectly in an electrical or non-electrical manner. Objects described herein as “adjacent” to one another may be physically in contact with each other, close to each other, or in the same general scope or area as they are appropriate to the context in which the phrases are used. The presence of the phrase "in one embodiment" here does not necessarily mean the same embodiment.

Also, in the specification and claims, reference to various variations of these expressions such as 'connected', 'connected', 'concluded', 'concluded', 'coupled', 'combined' and the like is directly related to other components. It is used in a sense that includes connecting or indirectly connecting through other components.

In addition, the suffixes "module" and "part" for components used in the present specification are given or mixed only considering the ease of writing the specification, and do not have a meaning or a role distinguished from each other by itself.

In addition, the terms used in this specification are for describing the embodiments and are not intended to limit the present invention. In this specification, the singular form also includes the plural form unless otherwise specified in the phrase. As used herein, 'comprise' and / or 'comprising' refers to the components, steps, operations and / or elements mentioned above, the presence of one or more other components, steps, operations and / or elements. Or do not exclude additions.

In addition, in the description of the invention, when it is determined that the detailed description of the known technology related to the invention may unnecessarily obscure the subject matter of the invention, the detailed description will be omitted. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing an embodiment of the positive suction pump. A positive suction pump according to an embodiment includes a case 110 consisting of an upper case 111 and a lower case 112. The case 110 may be connected to the suction pipe 1 through the suction pipe connection portion 113, and may be connected to the discharge pipe 2 through the discharge pipe connection portion 114.

In the inner space formed by the upper case 111 and the lower case 112, the shaft 120 may be installed through the case 111. The shaft 120 may be installed to protrude to the outside through the shaft insertion hole formed in the case 110, and the protruded shaft 120 is connected to the motor 3 and the coupling 4 located outside the motor The power for rotation can be transmitted from (3).

The impeller 130 is provided in the inner space of the case 110. The impeller 130 generates a suction pressure to suck the fluid and a discharge pressure to discharge the fluid with a rotating centrifugal force. The impeller 130 is fixed to the shaft 120 and can rotate together by rotation of the shaft 120. The impeller 130 may be formed to suck fluid into both sides. The impeller 130 may be installed at a portion where the suction pipe connecting portion 113 and the discharge pipe connecting portion 114 are connected.

The bearing part 140 may be adopted to support the shaft 120 to the case 110. The bearing unit 140 may include a bearing housing, a deflector, a bearing nut, a bearing washer, a bearing, a bearing ring, a bearing cover 141, and the like.

When the shaft 120 is installed through the case through the shaft insertion hole of the case 110, the sealing member 150 to reduce the leakage of fluid into the space between the case 110 and the shaft 120 Can be installed. As the sealing member 150, a grand packing or a mechanical seal can be used. 1 shows an example in which a mechanical seal is applied to the sealing member 150.

When a foreign substance is included in the fluid sucked through the suction pipe 1, the foreign substance is introduced into the mechanical seal. When a foreign material enters the mechanical seal, the foreign material causes damage to the mechanical seal by rotation of the shaft 120. The contaminants contained in the suction pipe (1) with such condensed milk are factors that shorten the life of the mechanical seal.

In order to prevent damage to the sealing member 150, it is possible to consider a method of supplying a fluid containing no foreign matter to the mechanical seal. This configuration is particularly effective to reduce damage to the mechanical seal when the mechanical seal is adopted as the sealing member 150. The configuration of the pump for this will be described with reference to FIGS. 2 to 5.

2 is a view showing a positive suction pump according to an embodiment of the present invention.

The positive suction pump according to an embodiment of the present invention is further provided with a supply pipe connecting portion 115 to receive a supply fluid from the supply pipe 5 to the sealing member 115. The supply fluid supplied from the supply pipe 5 flows into the case 110 through the sealing member 115, and then is discharged to the discharge pipe together with the fluid sucked through the suction pipe 1.

3 and 4 is a view showing a cross-sectional view of the positive suction pump according to an embodiment of the present invention.

3 and 4, the impeller 130 and the sealing member 150 are installed on the shaft. A sealing space 116 in which the sealing member 150 can be positioned is formed in the lower case 112. 2, the supply fluid supplied from the supply pipe 5 flows into the sealing space 116. Since the sealing member 150 prevents the supply fluid from leaking to the outside, the supply fluid is introduced into the case 110. The supply fluid introduced into the case 110 is discharged to the discharge pipe 2 by the discharge pressure of the impeller 130 and is discharged together with the fluid sucked from the suction pipe 1.

In order to prevent the suction fluid from entering the sealing space 116 from the inner space of the case 110 where the impeller 130 is located, the pressure of the fluid in the sealing space 116 is located in the case 110 where the impeller 130 is located. ) Can be maintained at a higher pressure than the interior space. To this end, the supply fluid supplied from the supply pipe 5 may be supplied at a pressure higher than the inner space of the case 110 in which the impeller 130 is located so that the pressure of the sealing space 116 is maintained at a high pressure.

In addition, the space toward the inner space in the sealing space 116 decreases the rotational movement of the shaft so that the fluid flow between the sealing space 116 and the inner space of the case 110 in which the impeller 130 is located decreases. The inner surface of the case 110 may be formed to contact the shaft 120 as much as possible so as not to be inhibited as much as possible. Examples of this are shown in FIGS. 3 and 4. 3 and 4, the inner wall of the case 110 partitioning the inner space and the sealing space 116 may be formed to protrude to reach the shaft as much as possible.

The supply fluid supplied from the supply pipe 5 may be a fluid from which foreign substances have been removed. To this end, the supply pipe 5 may be connected to an external pump that supplies a fluid in which foreign substances are filtered. In the case of using an external pump, the pressure in the sealing space 116 by the fluid supplied from the supply pipe 5 can be maintained at a higher pressure than the internal space where the impeller 130 is located, and the filtered fluid is supplied to the supply pipe. (5).

In one embodiment, the external pump may include a control unit and a backflow detection sensor. The backflow detection sensor can detect whether the fluid is backflowing in the entire cycle of supplying the fluid to the supply pipe (5). The control unit can supply the fluid filtered at a pressure that is not backflowed to the supply piping 5 by determining whether the fluid is not discharged backward from the supply piping 5 and discharged to the sealing space 116 through the backflow detection sensor. have. For example, for energy efficiency, the control unit may supply fluid to the supply pipe 5 at a pressure higher than 1 pressure unit and lower than 10 pressure units than a pressure at which no backflow occurs. Here, the pressure unit is a pressure unit adjustable in an external pump. Preferably, the control unit may supply the fluid to the supply pipe 5 at a pressure 1 pressure higher than the pressure at which no back flow occurs for energy efficiency.

Meanwhile, the supply pipe 5 may be connected to the discharge pipe 2 as shown in FIG. 5, and a discharge fluid discharged from the pump may be used as a supply fluid.

5 is a view showing an application example of a positive suction pump according to an embodiment of the present invention. In the embodiment of Fig. 5, the supply pipe 5 is connected to the discharge pipe 2 in order to use the discharge fluid as a supply fluid. Since the fluid sucked through the suction pipe 1 is discharged to the discharge pipe 2, in general, foreign substances contained in the suction fluid are also included in the discharge fluid. The filter 6 may be provided in the supply pipe 5 by removing the foreign matter from the discharge fluid and supplying it to the pump.

The filter 6 may be a filter having a simple structure for removing foreign substances such as sand, and may be formed in a structure capable of easily removing foreign substances. In addition, the end of the supply pipe (5), or the supply pipe connection 115 may be further provided with an additional filter for removing foreign matter, such as a strainer.

In one embodiment, when the fluid discharged from the discharge pipe 2 is used as a supply fluid, an external pump may be used to increase hydraulic pressure. As described above, in the case of using an external pump, the pressure in the sealing space 116 by the fluid supplied from the supply pipe 5 is a pressure that can be maintained at a higher pressure than the inner space where the impeller 130 is located, filtration The supplied fluid may be supplied to the supply pipe 5, and the external pump may include a control unit and a backflow detection sensor.

In one embodiment, the external pump may be connected to the supply pipe passage to increase the pressure of the fluid through which the foreign matter is filtered through the filter. In this embodiment, the external pump may be connected to the supply pipe passage in the following order of the filter.

In another embodiment, when the fluid discharged from the discharge pipe 2 is used as a supply fluid, the flow rate of the fluid supplied from the discharge pipe 2 to the supply pipe 5 may be adjusted to increase the hydraulic pressure. To this end, the discharge pipe or the supply pipe may include a valve device capable of adjusting the flow rate of the fluid supplied from the discharge pipe 2 to the supply pipe 5. The valve device may include a control unit and a backflow detection sensor. The backflow detection sensor can detect whether the fluid is backflowing in the entire cycle in which the valve device supplies fluid to the supply pipe (5).

As described above, the control unit determines whether the fluid is not discharged in the reverse flow from the supply pipe 5 and is supplied to the sealing space 116 through the backflow detection sensor, thereby supplying the filtered fluid at a pressure that is not backflowed. (5). For example, for energy efficiency, the control unit may supply fluid to the supply pipe 5 at a pressure higher than 1 pressure unit and lower than 10 pressure units than a pressure at which no backflow occurs. Here, the pressure unit is a pressure unit that can be adjusted in the valve device. Preferably, the control unit may supply the fluid to the supply pipe 5 at a pressure 1 pressure higher than the pressure at which no back flow occurs for energy efficiency.

6 is a block diagram showing a pump management system 10 according to an embodiment of the present invention. The pump management system 10 includes a pump 100 described above, a leak detector 210 for detecting a leak of fluid from the pump 100, a communication unit 220 for performing data communication with an external terminal, and a user input. It may include a user interface 230 for receiving input or outputting information to a user through an indicator or a buzzer, and a control unit 240 for controlling each component of the pump management system 10. The control unit 240 may control the external pump or valve device so that the internal fluid pressure of the sealing space 116 is maintained higher than the pressure of the internal space where the impeller 130 is located.

A leak detection unit 210 may be installed in the pump 100 to determine whether fluid leakage occurs through the sealing member 150 due to wear of the sealing member 150. In one embodiment, the leak detector 210 may be a tape for leak detection. For example, a leak detection tape may be attached to one end of the shaft 120 passing through the sealing member 150 to detect leakage through the sealing member 150. The user may determine whether the fluid leaks through the sealing member 150 through discoloration of the leak detection tape attached to one end of the shaft 120.

In another embodiment, the leak detection unit 210 may be installed under the sealing member 150 to include a chamber for collecting fluid leaking from the sealing member 150 and a fluid detection sensor installed in the chamber. The chamber may be equipped with a fluid detection sensor installed as an electrode for detecting the leaked fluid. As the fluid flows into the chamber as the fluid leaks through the sealing member 15, when a fluid having a predetermined volume or more is present in the chamber, it may be detected by the fluid detection sensor, and the leak of the fluid may be guided to the user. You can.

For example, when the fluid is water, a leak detection electrode may be installed in the chamber. The controller 240 may turn on the leak indicator light provided in the pump control panel through the current sensed at the leak detection electrode in the chamber. In addition, the control unit 240 may generate a warning sound by operating the buzzer. Additionally, the control unit 240 may cut off the power of the motor 3 that drives the pump. In addition, the control unit 240 may notify whether the pump is leaking to a preset manager terminal through a communication unit (WCDMA, WIFI, Bluetooth, etc.). The user may inquire whether or not the controller 240 leaks through the terminal.

In the case of using a conventional gland packing or a mechanical seal having low durability, the manager for operating the pump 100 to check and replace the sealing member 150 as it is frequently damaged is replaced by the pump 100 Had to reside in

However, in accordance with an embodiment of the present invention, the durability of the sealing member is improved, and when a leak occurs in the sealing member 150, it is possible to guide the manager terminal as to whether or not there is a leak as described above. In terms of being able to replace the grand packing, the pump management system 10 allows an administrator to remotely manage the operation of the pump 100 without having to reside in the pump 100.

To this end, the pump management system 10 according to an embodiment of the present invention can be controlled by an external terminal. The pump management system 10 may perform data communication connection with an external terminal through the communication unit 220. The external terminal may be an administrator terminal having authority to manage the pump management system 10. The controller 240 may check whether the external terminal connected to the pump management system 10 has administrator authority, and if it has administrator authority, may control the pump management system 10 according to a control command received from the external terminal. .

In one embodiment, the control unit 240 may control the operation of the pump 100 according to the start command or stop command of the pump management system 10 received from the external terminal. The operation of the control unit will be described with reference to an embodiment of the pump management system shown in FIG. 7. 7 discloses a pump management system in which the vacuum pump 310, the electric valve 312, the water level sensor 314, the electric distillation valve 410, and the check valve 412 are further illustrated in the pump management system of FIG. 5 described above. do.

The control unit 240 may operate the vacuum pump 310 to remove the air in the pump 100 according to the operation command received from the external terminal. After the vacuum pump 310 is operated, the control unit 240 may open the electric valve 312 to suck air remaining in the pump 100 toward the vacuum pump.

The full water sensor 314 senses whether the interior space of the pump 100 is filled with fluid. In order to check whether all the air in the pump 100 is removed and the interior space of the pump 100 is filled with the fluid introduced from the suction pipe 1, the control unit 240 is a value sensed from the full water sensor 314 can confirm.

The control unit 240 starts the operation of the pump 100 when it is detected from the full water sensor 314 that the space in the pump is filled with fluid. When the pressure inside the pump rises as the impeller 130 rotates due to the start of the operation of the pump 100, the control unit 240 opens the electric distillation valve 410 and the check valve 412 to discharge fluid into the discharge pipe 2 While being discharged, the operation of the vacuum pump 310 is stopped and the electric valve 312 is closed.

The control unit 240 stops the operation of the pump 100 when an operation stop command is received from an external terminal. When the pump is stopped, the operation of the pump management system 10 may be stopped by locking the electric distillation valve 410 and the check valve 412 and switching the pump management system 10 to the standby mode.

The pump according to the above-described exemplary embodiment may be implemented in a program instruction form that can be executed through various computer means and recorded on a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, or the like alone or in combination. The program instructions recorded on the medium may be specially designed and configured according to embodiments or may be known and available to those skilled in computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs, DVDs, and magnetic media such as floptical disks. -Hardware devices specially configured to store and execute program instructions such as magneto-optical media, and ROM, RAM, flash memory, and the like. Examples of program instructions include high-level language code that can be executed by a computer using an interpreter, etc., as well as machine language codes produced by a compiler.

Each of the drawings referred to in the description of the preceding embodiment is only an example shown for convenience of description, and items, contents, and images of information displayed on each screen may be displayed in various forms.

The present invention has been described with reference to one embodiment shown in the drawings, but this is merely exemplary, and those skilled in the art will understand that various modifications and other equivalent embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

1: suction pipe 2: discharge pipe
3: Motor 4: Coupling
5: Supply piping 6: Filter
100: pump 110: case
111: upper case 112: lower case
113: suction pipe connection 114: discharge pipe connection
115: supply pipe connection 116: sealing space
120: shaft 130: impeller
140: bearing portion 141: bearing cover
150: sealing member
10: pump management system
210: leak detection unit 220: communication unit
230: user interface 240: control unit
310: vacuum pump 312: electric valve
314: Mansu detector
410: electric distillation valve 412: check valve

Claims (6)

A casing connected to the suction pipe and the discharge pipe;
A shaft for rotating the impeller within the casing;
And a sealing space formed in the casing so that a sealing member for reducing a degree of leakage of the suction fluid sucked through the suction pipe between the casing and the shaft is located,
The sealing space is connected to a supply pipe supplying a supply fluid to the sealing space so as to reduce the degree of leakage of the suction fluid through the sealing member,
The supply fluid supplied from the supply pipe to the sealing space is discharged to the discharge pipe together with the suction fluid,
The supply pipe is a pump connected to the discharge pipe to supply the discharge fluid discharged to the discharge pipe to the sealing space.
According to claim 1,
A pump through which the foreign matter removed fluid is supplied to the sealing space through the supply pipe.
delete According to claim 1,
The supply pipe is a pump that includes a filter for removing foreign matter from the supply fluid supplied to the sealing space.
According to claim 1,
A pump further comprising a leak detector for detecting fluid leaking from the sealing member.
The method of claim 5,
The leak detection unit further comprises a communication unit for transmitting a leak of fluid to an external terminal when detecting a leak of fluid exceeding a preset leak amount from the sealing member.

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