Pump station with single-machine double-pump structure

Abstract

The utility model provides a pump station with a single-machine double-pump structure, which comprises a first pump sledge assembly, a motor sledge assembly and a second pump sledge assembly, the first pump sledge assembly comprises a first sledge frame, a first pump is arranged on the first sledge frame, the second pump sledge assembly comprises a second sledge frame, a second pump is arranged on the second sledge frame, and the first pump and the second pump are arranged on the motor sledge assembly. The motor sledge assembly comprises a third sledge frame, a motor is arranged on the third sledge frame, the first sledge frame, the third sledge frame and the second sledge frame are sequentially connected, and the motor is arranged between the first pump and the second pump and connected with the first pump and the second pump. According to the embodiment of the utility model, the two pumps are simultaneously driven by the single motor, so that the overall size and weight of the pump station are reduced, and the internal pipeline structure can be simplified; in addition, a split type structure is adopted, rapid disassembly and assembly can be achieved, equipment transfer is facilitated, and the working efficiency can be effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of pump station, specifically, it relates to a pump station with single machine double pump structure. BACKGROUND

[0002] In coal mine roof fracturing operation, a plurality of high-power fracturing pump sleds are used to form a fracturing pump sled unit to fracture the coal seam roof and release the internal stress of the roof, so as to achieve the purpose of rock burst disaster control. The conventional fracturing pump sled is composed of one motor driving one large pump. During operation, the single motor rotates at a high speed with a rated speed, and the power generated by the motor drives the fracturing pump through a reduction box and a transmission shaft. The fracturing fluid is pressurized by the fracturing pump to form superhigh pressure liquid and is discharged. The fracturing pump sled unit is composed of two or more fracturing pump sleds.

[0003] In the face of the problems of underground equipment transportation and insufficient roadway space, the development of the conventional fracturing pump sled unit faces the following problems: first, the weight and volume of the device are limited by underground transportation. The use of two or more fracturing pump sled units results in large overall volume and weight, which leads to difficult equipment transfer; second, the underground roadway not only needs to place the equipment for roof fracturing, but also needs to realize the coexistence of vehicles and personnel. The multiple fracturing pump sleds seriously occupy the roadway space. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the embodiment of the utility model is to provide a pump station with single machine double pump structure to solve the above problems existing in the prior art.

[0005] In order to solve the above technical problems, the embodiment of the utility model provides a pump station with single machine double pump structure, which comprises a first pump sled assembly, a motor sled assembly and a second pump sled assembly. The first pump sled assembly comprises a first sled rack, a first pump is arranged on the first sled rack, the second pump sled assembly comprises a second sled rack, a second pump is arranged on the second sled rack, the motor sled assembly comprises a third sled rack, a motor is arranged on the third sled rack, the first sled rack, the third sled rack and the second sled rack are connected in sequence, and the motor is arranged between the first pump and the second pump and is connected with the first pump and the second pump respectively.

[0006] In some embodiments, the first pump and the second pump adopt a plunger pump, and the plunger pump comprises a fluid end assembly and a power end assembly.

[0007] In some embodiments, the fluid end assembly of the first pump and the fluid end assembly of the second pump are consistent in direction.

[0008] In some embodiments, the first pump comprises a first pump body and a first speed reduction device, and the second pump comprises a second pump body and a second speed reduction device, the first speed reduction device is located on the side of the first pump body close to the motor, and the second speed reduction device is located on the side of the second pump body close to the motor.

[0009] In some embodiments, the output shafts located at both ends of the motor are connected to the first speed reduction device and the second speed reduction device respectively through a transmission device.

[0010] In some embodiments, the transmission device is a shaft coupling or a transmission shaft.

[0011] In some embodiments, the transmission shaft is a universal joint transmission shaft.

[0012] In some embodiments, a suction manifold is further included, the suction manifold comprises a first suction manifold corresponding to the first pump, a second suction manifold corresponding to the second pump, and a third suction manifold corresponding to the motor, one end of the first suction manifold and the second suction manifold is connected to an external water source, and the other end is connected to the third suction manifold.

[0013] In some embodiments, the first suction manifold and the second suction manifold are located on the first skid and the second skid respectively, a first part of the first suction manifold or the second suction manifold is connected to the corresponding first pump or second pump, a second part of the first suction manifold or the second suction manifold is fixed on the corresponding first skid or second skid, the first part and the second part are connected, and the third suction manifold is located on the third skid.

[0014] In some embodiments, the interface between the first suction manifold and the third suction manifold and / or the interface between the second suction manifold and the third suction manifold is connected through a connecting joint and fixed through a grooved pipe joint.

[0015] In some embodiments, a discharge manifold is further included, the discharge manifold comprises a first discharge manifold and a second discharge manifold, the first discharge manifold is located on the first skid and connected to the first pump, and the second discharge manifold is located on the second skid and connected to the second pump.

[0016] In some embodiments, a lubrication system is further included, the lubrication system comprises a power end lubrication unit and a hydraulic end lubrication unit, the power end lubrication unit comprises a first lubrication pipeline and an oil tank connected to each other, and the hydraulic end lubrication unit comprises a second lubrication pipeline and an oil bottle connected to each other.

[0017] In some embodiments, a heat dissipation system is further included, the heat dissipation system comprising a heat dissipation manifold, the heat dissipation manifold being in communication with the first lubrication line and / or the second lubrication line, the heat dissipation manifold having a cooler disposed thereon.

[0018] In some embodiments, the first skid frame and the third skid frame and the third skid frame and the second skid frame are detachably connected by a connecting member.

[0019] In some embodiments, the connecting member comprises a connecting seat and a connecting block, the connecting seat having a slot, the connecting block having a plug, the plug being capable of being inserted into the slot and being secured by a fastener.

[0020] The embodiment of the utility model discloses through single motor simultaneously driving two pumps, thereby reduce the overall volume and weight of pump station, can also simplify internal pipeline structure, in addition, adopt split type structure and can realize quick dismounting to facilitate equipment transfer, can effectively promote work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, obviously, the drawings in the following description are only some embodiments in the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without paying the creativity of labor.

[0022] Figure 1 The arrangement of the pump station with single-machine double-pump structure provided by the embodiment of the utility model is shown in the simplified schematic diagram.

[0023] Figure 2 The arrangement of the pump station with single-machine double-pump structure provided by the embodiment of the utility model is shown in the detailed schematic diagram.

[0024] Figure 3 The arrangement of the pump station with single-machine double-pump structure provided by the embodiment of the utility model is shown in the detailed schematic diagram.

[0025] Figure 4 The structure of the first pump skid assembly in the pump station with single-machine double-pump structure provided by the embodiment of the utility model is shown in the schematic diagram.

[0026] Figure 5 The connection between the first pump skid assembly and the motor skid assembly in the pump station with single-machine double-pump structure provided by the embodiment of the utility model is shown in the schematic diagram.

[0027] Figure 6 The structure of the connecting member between the first pump skid assembly and the motor skid assembly in the pump station with single-machine double-pump structure provided by the embodiment of the utility model is shown in the schematic diagram.

[0028] Figure 7 The utility model provides a connection schematic view of first suction manifold and third suction manifold in pump station with single machine double pump structure.

[0029] Reference signs:

[0030] 1 - first pump skid assembly;11 - first skid rack;12 - first pump;121 - first pump body;122 - first speed reducer;13 - first suction manifold;14 - first discharge manifold;15 - first pipeline;2 - motor skid assembly;21 - second skid rack;22 - second pump;221 - second pump body;222 - second speed reducer;23 - second suction manifold;24 - second discharge manifold;25 - second pipeline;3 - second pump skid assembly;31 - third skid rack;32 - motor;33 - third suction manifold;4 - power end lubrication unit;41 - first lubrication pipeline;42 - oil tank;5 - fluid end lubrication unit;51 - second lubrication pipeline;52 - oil bottle;6 - oil cooler;7 - connecting seat;8 - connecting block;9 - pin shaft;91 - spring pin;10 - heat dissipation system;101 - connecting joint;102 - pipe joint. DETAILED DESCRIPTION

[0031] Various aspects and features of the present utility model are described herein with reference to the accompanying drawings.

[0032] It is to be understood that various alterations can be made to the embodiments described herein. Thus, the above description is not to be considered exhaustive, but rather is given as a pertinent example based on the present utility model. Those skilled in the art will recognize other modifications that can be made without departing from the scope and spirit of the present utility model.

[0033] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present utility model and, together with the general description of the present utility model given above, and the detailed description of the embodiments given below, serve to explain the principles of the present utility model.

[0034] These and other characteristics of the present utility model will become readily apparent from the following description, given by way of non-restrictive example and with reference to the appended drawings.

[0035] It is also to be understood that, although a certain utility model has been described herein with a certain degree of particularity, there are other equivalent forms of this utility model which are immediately apparent to those skilled in the art in view of the teachings herein, and that many changes in the details of the described utility model can be made without departing from the spirit and scope of this utility model as defined by the following claims.

[0036] The above and other aspects, features, and advantages of the present utility model will become apparent from the following detailed description, taken in conjunction with the accompanying drawings, which illustrate specific embodiments of the present utility model.

[0037] The specific embodiments of the present application will be described hereinafter with reference to the drawings; however, it should be understood that the embodiments disclosed are merely examples of the present application, which can be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that obscure the present application. Therefore, the specific structural and functional details disclosed herein are not intended to be limiting, but are merely presented as a basis and representative basis for the claims for teaching those skilled in the art to use the present application in substantially any suitable detailed structure.

[0038] The present specification can use the phrases "in one embodiment", "in another embodiment", "in yet another embodiment" or "in other embodiments", which can all refer to one or more of the same or different embodiments under the present application.

[0039] The present application provides a pump station with a single machine and double pump structure, as shown in Figures 1-7 The pump station with a single machine and double pump structure comprises a first pump skid assembly 1, a motor skid assembly 3 and a second pump skid assembly 2 connected in sequence, wherein the first pump skid assembly 1 comprises a first skid rack 11, a first pump 12 is arranged on the first skid rack 11, the second pump skid assembly 2 comprises a second skid rack 21, and a second pump 22 is arranged on the second skid rack 21; the motor skid assembly 3 comprises a third skid rack 31, and a motor 32 is arranged on the third skid rack 31. Here, the first skid rack 11, the third skid rack 31 and the second skid rack 21 are connected in sequence, the motor 32 is arranged between the first pump 11 and the second pump 12, and Figure 1 In the present embodiment, the first pump 12 can be referred to as a left pump, and the second pump 22 can be referred to as a right pump.

[0040] Further, both ends of the motor 32 are provided with output shafts, and the motor 32 is rotatably connected to the first pump 11 and the second pump 12 located on both sides thereof through the two output shafts, so that the first pump 12 and the second pump 22 can be simultaneously driven by the motor 32, thereby reducing the number of motors.

[0041] In one embodiment, the first pump 12 and the second pump 22 herein preferably adopt a plunger pump, which can convert low-pressure water into high-pressure water for fracturing. The plunger pump comprises a hydraulic end assembly and a power end assembly.

[0042] In the present embodiment, the hydraulic end and the power end of the first pump 12 and the second pump 22 are oriented in the same direction, so that the first pump 12 and the second pump 22 are arranged on the same side.

[0043] Specifically, as shown in Figure 2 and Figure 3As shown, the first pump 12 comprises a first pump body 121 and a first speed reducer 122, and the second pump 22 comprises a second pump body 221 and a second speed reducer 222. The first speed reducer 122 of the first pump 12 is located at the right side of the first pump body 121 (i.e. the side close to the motor 32), and the second speed reducer 222 of the second pump 22 is located at the left side of the second pump body 221 (i.e. the side close to the motor 32).

[0044] The output shafts at both ends of the motor 32 can be connected to the first speed reducer 122 of the first pump 12 and the second speed reducer 222 of the second pump 22 through a transmission device, such as a shaft coupling or a transmission shaft, so as to directly transmit the output torque to the first pump 12 and the second pump 22. Preferably, a universal joint transmission shaft is used to connect the output shaft of the motor 32 to the first speed reducer 122 or the second speed reducer 222, which can further reduce the requirement for coaxiality between the motor 32 and the first pump 12 or the second pump 22.

[0045] The pump station with the single-motor double-pump structure also comprises a control system 10, a suction manifold and a discharge manifold. The control system is used to control the first pump 12, the second pump 22 and the motor 32. Specifically, the control system 10 comprises a control device and a plurality of sensors, such as temperature sensors, pressure sensors and liquid level sensors. The speed of the motor 32 can be controlled by detecting the sensor signals, so as to control the flow rate and pressure in the pump.

[0046] Further, the suction manifold comprises a first suction manifold 13 corresponding to the first pump 12, a second suction manifold 23 corresponding to the second pump 22 and a third suction manifold 33 corresponding to the motor 32. Specifically, the first suction manifold 13 is located on the first skid 11, and a first part thereof is connected to the first pump 12 and a second part thereof is fixed on the first skid 11. Similarly, the second suction manifold 23 is located on the second skid 21, and a first part thereof is connected to the second pump 22 and a second part thereof is fixed on the second skid 21. The third suction manifold 33 is located on the third skid 31.

[0047] Further, the first suction manifold 13 on the first skid 11 is provided with interfaces at both ends, one end of which is connected to an external water source, and the other end of which is connected to the third suction manifold 33 on the third skid 31; the second suction manifold 23 on the second skid 21 is provided with interfaces at both ends, one end of which is connected to an external water source, and the other end of which is connected to the third suction manifold 33 on the third skid 31, and the third suction manifold 33 on the third skid 31 is provided with interfaces at both ends.

[0048] In the existing pump station with a double-pump structure, the two pumps are oppositely arranged, that is, the liquid ends of the two pumps are arranged on opposite sides, so that the suction manifold of at least one of the pumps needs to be connected to the liquid inlet of the pump through a relatively complex pipeline. In the present embodiment, since the liquid ends and the power ends of the first pump 12 and the second pump 22 are oriented in the same direction, the first pump 12 and the second pump 22 are arranged on the same side, so that the corresponding suction manifolds can be arranged on one side. Specifically, the first suction manifold 13 corresponding to the first pump 12 and the second suction manifold 23 corresponding to the second pump 22 are arranged on the same side and can be arranged in the bottom of the corresponding skid, the first suction manifold 13 is directly connected to the first pump body 121 of the first pump 12 through the first pipeline 15, and the second suction manifold 23 is directly connected to the second pump body 221 of the second pump 22 through the second pipeline 25, thereby simplifying the pipeline connection in the pump station.

[0049] The interfaces between the first suction manifold 13 and the third suction manifold 33 and / or the interfaces between the second suction manifold 23 and the third suction manifold 33 can be connected through a joint. Specifically, for example, a connection joint 101 made of rubber or other flexible materials is used to connect the first suction manifold 13 and the third suction manifold 33, and a groove type pipe joint 102 is used to fix and realize quick disassembly and assembly.

[0050] Further, the discharge manifold includes a first discharge manifold 14 corresponding to the first pump 12 and a second discharge manifold 24 corresponding to the second pump 22, wherein the first discharge manifold 14 is arranged on the first skid 11 and connected to the first pump 12, and the second discharge manifold 24 is arranged on the second skid 21 and connected to the second pump 22.

[0051] Compared with the integrated pump station, the split structure of the embodiment allows a relative moving space between the motor and the pump, can realize quick disassembly and assembly between components, and improves the vibration resistance capability. In addition, the connecting structure between the pump skid assembly and the motor skid assembly in the embodiment can reduce the high requirement on coaxiality between the output shaft of the motor and the input shaft of the pump, specifically, the use of the transmission shaft, the shaft coupling and other transmission devices can reduce the requirement on coaxiality between the motor and the pump, and further, the first pump and the second pump do not need to be arranged in opposite directions to balance the vibration, and the purpose of avoiding reverse operation of the pump can also be achieved.

[0052] In addition, the pump station further comprises a lubricating system, wherein the lubricating system comprises a power end lubricating unit 4 and a hydraulic end lubricating unit 5, the power end lubricating unit 4 comprises a first lubricating pipeline 41 and an oil tank 42, the first lubricating pipeline 41 is connected with the oil tank 42, and a first oil pump is arranged on the first lubricating pipeline 41; the hydraulic end lubricating unit 5 comprises a second lubricating pipeline 51 and an oil bottle 52, the second lubricating pipeline 51 is connected with the oil bottle 52, and a second oil pump is arranged on the second lubricating pipeline 51.

[0053] The power end lubricating unit 4 is lubricated by the motor 32 through the first oil pump and the first lubricating pipeline 41 to realize oil absorption from the oil tank 42 and lubrication of each lubrication point of the crankshaft in the first pump 12 and / or the second pump 22, so as to realize lubrication of the power end; the hydraulic end lubricating unit 5 is connected to each piston disc joint in the first pump 12 or the second pump 22 through the second lubricating pipeline 51 by connecting a compressed air source, so as to realize lubrication of the hydraulic end.

[0054] Further, the pump station further comprises a heat dissipation system 6, and the heat dissipation system 6 is used for cooling the lubricating oil in the lubricating system, wherein the heat dissipation system 6 comprises a heat dissipation pipe manifold, the heat dissipation pipe manifold is communicated with the first lubricating pipeline 41 and / or the second lubricating pipeline 51, and an oil cooler 61 is arranged on the heat dissipation pipe manifold, so as to cool the cooling liquid in the heat dissipation pipe manifold.

[0055] Further, in order to facilitate quick disassembly and assembly between the first pump skid assembly 1, the second pump skid assembly 2 and the motor skid assembly 3, the first skid frame 11 and the third skid frame 31 and the third skid frame 31 and the second skid frame 21 are detachably connected through connecting pieces.

[0056] Specifically, the connecting piece here includes a connecting seat 7 and a connecting block 8, the connecting seat has a slot, and the connecting block has a plug which can be inserted into the slot and fixed by a fastener. In this embodiment, the connecting seat 7 has a V-shaped slot, and the connecting block 8 has a wedge-shaped structure, for example, a wedge-shaped head. For example, the connecting seat 7 is arranged on one of the first skid frame 11 and the third skid frame 31, and the connecting block 8 is arranged on the other one. Similarly, the connecting seat 7 is arranged on one of the third skid frame 31 and the second skid frame 21, and the connecting block 8 is arranged on the other one. The wedge-shaped head of the connecting block 8 here can be inserted into the V-shaped slot of the connecting seat 7 and fixed by a pin shaft 9 with a spring pin 91, so that the combination between the connecting seat 7 and the connecting block 8 is easier to achieve, and the disassembly and assembly are convenient and fast.

[0057] The connection between different suction manifolds through the joint and the connection between different skid frames through the connecting piece are all non-rigid connections, which greatly reduces the requirement for assembly accuracy. In addition, the non-rigid connection combined with the use of a transmission shaft can offset the damage of vibration to the pump station by the movement generated at the non-rigid connection and the transmission shaft when vibration occurs, so that the resistance of the combined pump station structure to vibration is greatly improved.

[0058] When working through the pump station with a single-machine double-pump structure in this embodiment, low-pressure fracturing fluid enters the fluid end of the first pump 12 and / or the second pump 22 through the interface of the first suction manifold 13 and / or the second suction manifold 23; the motor 32 converts electrical energy into mechanical energy, which is transmitted to the first pump 12 and the second pump 22 through the output shaft at both ends through a transmission device such as a transmission shaft or a shaft coupling, a speed reducer, etc. to drive the first pump 12 and the second pump 22 to operate; the first pump 12 and the second pump 22 convert the low-pressure fracturing fluid in the fluid end into high-pressure fracturing fluid and discharge it through the first discharge manifold 14 and the second discharge manifold 24.

[0059] The embodiment of the utility model drives two pumps by a single motor, thereby reducing the overall volume and weight of the pump station, and also simplifying the internal pipeline structure; in addition, the split structure is adopted and can be quickly disassembled for equipment transfer, which can effectively improve the work efficiency.

[0060] In addition, the features of the embodiments shown in the drawings or mentioned in the specification of the present application are not necessarily understood as independent embodiments from each other. Rather, each feature described in one example of an embodiment can be combined with one or more other desired features from other embodiments, thereby generating other embodiments which are not described in words or with reference to the drawings.

[0061] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not limit them; although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A pumping station with a single-unit dual-pump structure, characterized in that, The pump skid assembly comprises a first pump skid assembly, a motor skid assembly and a second pump skid assembly, the first pump skid assembly comprises a first skid frame, a first pump is arranged on the first skid frame, the second pump skid assembly comprises a second skid frame, a second pump is arranged on the second skid frame, the motor skid assembly comprises a third skid frame, a motor is arranged on the third skid frame, the first skid frame, the third skid frame and the second skid frame are connected in sequence, and the motor is arranged between and connected with the first pump and the second pump.

2. The pump station with single machine double pump structure according to claim 1, characterized in that, The first pump and the second pump adopt a plunger pump, and the plunger pump comprises a fluid end assembly and a power end assembly.

3. The pump station with single machine and double pump structure according to claim 2, characterized in that, The fluid end assembly of the first pump and the fluid end assembly of the second pump are consistent in direction.

4. The pump station with single machine and double pump structure according to claim 1, characterized in that, The first pump comprises a first pump body and a first speed reducer, the second pump comprises a second pump body and a second speed reducer, the first speed reducer is located on the side of the first pump body close to the motor, and the second speed reducer is located on the side of the second pump body close to the motor.

5. The pump station with single machine double pump structure according to claim 4, characterized in that, The output shafts at both ends of the motor are connected with the first speed reducer and the second speed reducer through a transmission device.

6. The pump station with single machine double pump structure according to claim 5, characterized in that, The transmission device is a shaft coupling or a transmission shaft.

7. The pump station with single machine double pump structure according to claim 6, characterized in that, The transmission shaft is a universal joint transmission shaft.

8. The pump station with single machine and double pump structure according to claim 1, characterized in that, The pump skid assembly further comprises a suction manifold, the suction manifold comprises a first suction manifold corresponding to the first pump, a second suction manifold corresponding to the second pump and a third suction manifold corresponding to the motor, one end of the first suction manifold and the second suction manifold is connected with an external water source, and the other end is connected with the third suction manifold.

9. The pump station with single machine double pump structure according to claim 8, characterized in that, The first suction manifold and the second suction manifold are arranged on the first skid frame and the second skid frame respectively, a first part of the first suction manifold or the second suction manifold is connected with the first pump or the second pump, a second part of the first suction manifold or the second suction manifold is fixed on the first skid frame or the second skid frame, the first part and the second part are communicated, and the third suction manifold is arranged on the third skid frame.

10. The pump station with single machine double pump structure according to claim 8, characterized in that, The interface of the first suction manifold and the interface of the third suction manifold are connected through a connecting joint and fixed through a groove type pipe joint.

11. The pump station having a single machine dual pump configuration of claim 1, wherein, The pump skid assembly further comprises a discharge manifold, the discharge manifold comprises a first discharge manifold and a second discharge manifold, the first discharge manifold is arranged on the first skid frame and connected with the first pump, and the second discharge manifold is arranged on the second skid frame and connected with the second pump.

12. The pump station with single machine double pump structure according to claim 1, characterized in that, The pump skid assembly further comprises a lubrication system, the lubrication system comprises a power end lubrication unit and a fluid end lubrication unit, the power end lubrication unit comprises a first lubrication pipeline and an oil tank connected with each other, and the fluid end lubrication unit comprises a second lubrication pipeline and an oil bottle connected with each other.

13. The pump station with single machine double pump structure according to claim 12, characterized in that, The pump skid assembly further comprises a heat dissipation system, the heat dissipation system comprises a heat dissipation manifold, the heat dissipation manifold is communicated with the first lubrication pipeline and / or the second lubrication pipeline, and a cooler is arranged on the heat dissipation manifold.

14. The pump station having a single machine dual pump configuration of claim 1, wherein, The first skid frame is detachably connected with the third skid frame and the third skid frame is detachably connected with the second skid frame by connecting pieces.

15. The pump station with single machine double pump structure according to claim 14, characterized in that, The connecting pieces include connecting seats and connecting blocks, the connecting seats have slots, and the connecting blocks have plugs which can be inserted into the slots and fixed by fasteners.

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