Plunger pump dismounting device and plunger pump

Abstract

The utility model relates to a plunger pump dismounting device and a plunger pump, and relates to the technical field of petroleum drilling. The plunger pump dismounting device comprises a sleeve, a plurality of limiting pieces and a connecting piece. The sleeve is configured to be capable of being arranged outside a to-be-disassembled piece in a sleeving mode. The multiple limiting assemblies are arranged on the side face of the sleeve and communicate with the sleeve, the multiple limiting assemblies are arranged in the circumferential direction of the sleeve, and the limiting assemblies can move in the radial direction of the sleeve so that the limiting assemblies can be inserted into mounting holes of a part to be disassembled; the connecting piece is arranged at the top of the sleeve, and the connecting piece can be connected with the driving piece so as to drive the sleeve and the to-be-disassembled piece in the sleeve to rotate under the action of the driving piece. According to the technical scheme, the problems that an existing pump head four-hole pipe fitting pressing cap is detached through tools such as a crow bar and a hammer, the pressing cap is prone to being damaged due to uneven stress, and the crow bar and the hammer are prone to falling off in the detaching process can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of oil drilling, in particular to a plunger pump dismounting device and plunger pump. BACKGROUND

[0002] In oil drilling, the efficiency and stability of equipment are key factors to ensure successful drilling. As an important liquid delivery equipment, the plunger pump plays an indispensable role in the process of oil drilling and is a commonly used pumping equipment in drilling operations.

[0003] The pump head four-hole pipe fitting pressure cap is an element of the plunger pump hydraulic end, and the pump head four-hole pipe fitting pressure cap is threadedly connected with the pump body. When plunger pump cavity is blocked or plunger pump hydraulic end element is replaced, the pump head four-hole pipe fitting pressure cap needs to be dismounted for maintenance. In some cases, a crowbar or a hammer is inserted into one of the holes of the pump head four-hole pipe fitting pressure cap, and the pump head four-hole pipe fitting pressure cap is rotated by artificial prying or knocking, so as to complete the dismounting. However, since the plunger pump generates high pressure when working, pressure adhesion occurs at the connection between the pump head four-hole pipe fitting pressure cap and the pump body, so the pump head four-hole pipe fitting pressure cap cannot be rotated by artificial means. In addition, the crowbar or the hammer has only one force point with the pump head four-hole pipe fitting pressure cap, which not only easily slips off, has safety risks, but also easily causes deformation and damage of the pump head four-hole pipe fitting pressure cap. SUMMARY

[0004] The utility model embodiment provides a kind of plunger pump dismounting device and plunger pump, can solve the problem that the pump head four-hole pipe fitting pressure cap is dismounted by crowbar, hammer etc. in existing, not only lead to uneven force of pressure cap easy to damage, and crowbar, hammer easy to fall off in the process of dismounting.

[0005] In the first aspect, the utility model embodiment provides a kind of plunger pump dismounting device, comprising:

[0006] sleeve, the sleeve is structured to be able to be set in the outside of the piece to be dismounted;

[0007] a plurality of limiting components are arranged on the side of the sleeve and are communicated with the sleeve, and the plurality of limiting components are arranged circumferentially around the sleeve, and the limiting component is structured to be able to move along the radial direction of the sleeve, so that the limiting component is inserted into the mounting hole of the piece to be dismounted;And

[0008] connecting piece, set in the top of the sleeve, the connecting piece is structured to be able to be connected with the driving piece, so as to drive the sleeve and the piece to be dismounted in the sleeve to rotate under the action of the driving piece.

[0009] In one embodiment, the limiting component comprises:

[0010] A guide cylinder is arranged on the side of the sleeve and communicates with the sleeve;

[0011] A plug rod is movably arranged in the guide cylinder;

[0012] A limiting member is detachably arranged on the guide cylinder; and

[0013] An elastic member is sleeved on the plug rod;

[0014] In the connected state, the limiting member abuts against the plug rod to block the movement of the plug rod, and the elastic member is compressed and deformed; in the released state, the limiting member is unblocked to release the elastic force of the elastic member and drive the movement of the plug rod, so that the plug rod is inserted into the mounting hole.

[0015] In one embodiment, the guide cylinder is provided with a sliding groove on both sides, the sliding groove penetrating the guide cylinder in the radial direction of the guide cylinder; the plug rod is provided with a sliding block on both sides, the sliding block being inserted into the sliding groove;

[0016] In one embodiment, one end of the elastic member is connected to the sliding block, and the other end of the elastic member is connected to the end of the guide cylinder away from the sleeve.

[0017] In one embodiment, the limiting member includes a blocking pin and a blocking pin nut; in the connected state, the blocking pin penetrates the sliding groove, and the blocking pin nut is threadedly connected with the blocking pin to fix the blocking pin on the guide cylinder and abut against one end of the plug rod.

[0018] In one embodiment, the sleeve includes:

[0019] A first cylinder segment; and

[0020] A second cylinder segment arranged at the bottom of the first cylinder segment, the second cylinder segment communicating with the first cylinder segment, the inner diameter of the second cylinder segment being greater than that of the first cylinder segment, and the outer diameter of the second cylinder segment being greater than that of the first cylinder segment;

[0021] The connecting member is arranged at the top of the first cylinder segment, and the limiting assembly is arranged on the side of the second cylinder segment.

[0022] In one embodiment, the connecting member is a hexagonal shaft.

[0023] In one embodiment, the driving member is a pneumatic wrench.

[0024] In one embodiment, a plurality of limiting assemblies correspond one-to-one to a plurality of mounting holes of the to-be-detached member, and the limiting assemblies are inserted into the corresponding mounting holes.

[0025] In a second aspect, the utility model discloses a plunger pump, comprising a to be disassembled part, the plunger pump adopts the plunger pump dismounting device from the plunger pump to dismount the to be disassembled part.

[0026] Compared with the prior art, the utility model discloses the advantages that by setting up multiple limiting components that can move along the radial direction of the sleeve, the multiple limiting components are respectively inserted into the mounting holes of the to be disassembled part, multiple connection points and stress points are simultaneously provided between the dismounting device and the to be disassembled part, the to be disassembled part is uniformly stressed, the problem that the existing crowbar, hammer and other tools can only be inserted into one mounting hole of the cap of the four-hole pipe of the pump head, only one stress point is provided, the cap is unevenly stressed and is easy to be damaged, and the crowbar and hammer are easy to fall off is solved, the sleeve is rotated by the driving part, the to be disassembled part is rotated with the sleeve, and the dismounting is completed, compared with the existing dismounting mode, the utility model provides a special dismounting device, time and labor are saved, and one person can easily complete the dismounting. BRIEF DESCRIPTION OF DRAWINGS

[0027] In the following, the utility model will be described in more detail based on the embodiments and with reference to the drawings.

[0028] Figure 1 It is the front view of the plunger pump dismounting device provided by an embodiment of the utility model;

[0029] Figure 2 It is Figure 1 It is the top view of the plunger pump dismounting device provided by an embodiment of the utility model;

[0030] Figure 3 It is Figure 1 It is the sectional view of the plunger pump dismounting device provided by an embodiment of the utility model in the top direction;

[0031] Figure 4 It is Figure 1 It is the structural schematic view of the to be disassembled part provided by an embodiment of the utility model;

[0032] Figure 5 It is the structural schematic view of the plunger pump provided by another embodiment of the utility model.

[0033] Reference signs:

[0034] 1, pump body, 2, to be disassembled part, 3, pressure relief valve, 4, plunger pump dismounting device, 5, mounting hole, 6, upper thread, 7, lower thread;

[0035] 10, sleeve, 110, first cylinder segment, 120, second cylinder segment;

[0036] 20. Limiting component; 210. Guide cylinder; 2101. Slide groove; 220. Insert rod; 2201. Slider; 230. Limiting element; 2301. Stop pin; 2302. Stop pin nut; 240. Elastic element;

[0037] 30. Connectors. Detailed Implementation

[0038] The present invention will be further described below with reference to the accompanying drawings.

[0039] In oil drilling, the efficiency and stability of equipment are key factors in ensuring successful drilling. As an important fluid delivery device, the plunger pump plays an indispensable role in the oil drilling process and is a commonly used pumping device in drilling operations.

[0040] The four-hole cap on the pump head is a component of the hydraulic end of a plunger pump. It is threadedly connected to the pump body. When the plunger pump chamber becomes blocked or when replacing hydraulic end components, the four-hole cap needs to be disassembled for maintenance, such as packing replacement, valve replacement, or valve spring replacement. In some cases, a pry bar or hammer is inserted into one of the holes of the cap, and manual prying or tapping is used to rotate it, thus completing the disassembly. However, because plunger pumps generate high pressure during operation, the connection between the cap and the pump body can become pressure-adhesive, making it impossible to rotate the cap manually. Furthermore, pry bars, hammers, and other tools share only one point of force with the cap, making it prone to slippage and posing a safety risk, and also easily leading to deformation and damage to the cap.

[0041] Example 1

[0042] like Figures 1-3 As shown, in order to solve the above-mentioned technical problems, this utility model provides a plunger pump disassembly device, including a sleeve 10, a plurality of limiting components 20 and a connecting member 30; the sleeve 10 is configured to be sleeved on the outside of the part 2 to be disassembled; the plurality of limiting components 20 are disposed on the side of the sleeve 10 and communicate with the sleeve 10, the plurality of limiting components 20 are arranged circumferentially around the sleeve 10, and the limiting components 20 are configured to be movable in the radial direction of the sleeve 10 so that the limiting components 20 are inserted into the mounting hole 5 of the part 2 to be disassembled; the connecting member 30 is disposed on the top of the sleeve 10, and the connecting member 30 is configured to be connected to a driving member so that the sleeve 10 and the part 2 to be disassembled inside the sleeve 10 are rotated under the action of the driving member.

[0043] From the above, by setting a plurality of limiting components 20 that can move in the radial direction of the sleeve 10, the plurality of limiting components 20 are respectively inserted into the mounting hole 5 of the to-be-disassembled part 2, so that the disassembling device and the to-be-disassembled part 2 have a plurality of connection points and stress points at the same time, the to-be-disassembled part 2 is uniformly stressed, and the problems that the existing crowbar, hammer and other tools can only be inserted into one mounting hole 5 of the pump head four-hole pipe fitting pressure cap, and only one stress point is caused, which leads to uneven stress of the pressure cap and easy damage, and the crowbar and hammer are easy to fall off; by setting a special connecting piece 30 connected with the driving piece, the sleeve 10 is driven to rotate by the driving piece, and the to-be-disassembled part 2 rotates with the sleeve 10, thereby completing disassembly. Compared with the existing disassembly method, time and labor are saved, and one person can easily complete disassembly.

[0044] It should be noted that the to-be-disassembled part 2 includes but is not limited to the pump head four-hole pipe fitting pressure cap; as shown in Figure 4 The top of the pump head four-hole pipe fitting pressure cap is provided with an upper thread 6 for connecting other accessories of the plunger pump, the bottom of the pump head four-hole pipe fitting pressure cap is provided with a lower thread 7 for connecting the pump body 1 of the plunger pump, and the side surface of the pump head four-hole pipe fitting pressure cap is provided with a plurality of mounting holes 5. Because the depth of the mounting hole 5 is shallow, the crowbar, hammer and other tools are easy to fall off, which causes disassembly failure and safety hazards.

[0045] Example two

[0046] As shown in Figures 1-3 The plunger pump disassembling device includes a sleeve 10, a plurality of limiting components 20 and a connecting piece 30; the sleeve 10 is configured to be sleeved on the to-be-disassembled part 2; the plurality of limiting components 20 are arranged on the side surface of the sleeve 10 and are in communication with the sleeve 10, the plurality of limiting components 20 are arranged circumferentially around the sleeve 10, and the limiting component 20 is configured to move in the radial direction of the sleeve 10, so that the limiting component 20 is inserted into the mounting hole 5 of the to-be-disassembled part 2; the connecting piece 30 is arranged on the top of the sleeve 10, and the connecting piece 30 is configured to be connected with the driving piece, so as to drive the sleeve 10 and the to-be-disassembled part 2 in the sleeve 10 to rotate under the action of the driving piece.

[0047] As can be seen from the above, by setting the plurality of limiting assemblies 20 movable along the radial direction of the sleeve 10, the plurality of limiting assemblies 20 are respectively inserted into the mounting hole 5 of the to-be-disassembled part 2, so that the disassembling device and the to-be-disassembled part 2 have a plurality of connection points and stress points at the same time, the to-be-disassembled part 2 is uniformly stressed, and the problems that the existing crowbar, hammer and the like can only be inserted into one mounting hole 5 of the pressure cap of the pump head four-hole pipe fitting, only one stress point is formed, and the pressure cap is easily damaged and the crowbar and hammer are easily detached are solved; by setting the special connecting piece 30 connected with the driving piece, the sleeve 10 is driven to rotate by the driving piece, the to-be-disassembled part 2 rotates with the sleeve 10, and the disassembly is completed, compared with the existing disassembly method, time and labor are saved, and one person can easily complete the disassembly.

[0048] It should be noted that the to-be-disassembled part 2 includes but is not limited to the pump head four-hole pipe fitting pressure cap; as shown in Figure 4 , the top of the pump head four-hole pipe fitting pressure cap is provided with an upper thread 6 for connecting other accessories of the plunger pump, the bottom of the pump head four-hole pipe fitting pressure cap is provided with a lower thread 7 for connecting the pump body 1 of the plunger pump, and the side surface of the pump head four-hole pipe fitting pressure cap is provided with a plurality of mounting holes 5, because the depth of the mounting hole 5 is shallow, the crowbar, hammer and the like are easily detached, disassembly fails, and there is a safety hazard.

[0049] As shown in Figure 1 , Figure 3 , in some embodiments, the limiting assembly 20 includes a guide cylinder 210, a plug rod 220, a limiting piece 230 and an elastic piece 240; the guide cylinder 210 is arranged on the side surface of the sleeve 10 and communicates with the sleeve 10; the plug rod 220 is movably arranged in the guide cylinder 210; the limiting piece 230 is detachably arranged on the guide cylinder 210; the elastic piece 240 is sleeved on the plug rod 220; wherein, in the connected state, the limiting piece 230 abuts against the plug rod 220 to block the movement of the plug rod 220, and the elastic piece 240 is compressed and deformed; in the loosened state, the limiting piece 230 is unblocked, so that the elastic piece 240 releases the elastic force and drives the plug rod 220 to move, so that the plug rod 220 is inserted into the mounting hole 5.

[0050] The connection between the limiting assembly 20 and the to-be-disassembled part 2 is achieved by the movement of the insertion rod 220, which provides a structural basis for the disassembly of the to-be-disassembled part 2; when the insertion rod 220 is inserted into the mounting hole 5 of the to-be-disassembled part 2, the limiting assembly 20 is connected with the to-be-disassembled part 2; when the insertion rod 220 leaves the mounting hole 5 of the to-be-disassembled part 2, the limiting assembly 20 is disconnected with the to-be-disassembled part 2. Through the cooperation of the limiting piece 230 and the elastic piece 240, the switching between the connected state and the disconnected state is realized, and the switching mode is simple, convenient and reliable; in the connected state, the limiting piece 230 abuts against the insertion rod 220, blocks the movement of the insertion rod 220, and makes the elastic piece 240 compressively deform to store elasticity; in the disconnected state, the limiting piece 230 is removed, the insertion rod 220 is inserted into the mounting hole 5 under the action of the elastic piece 240, and the elastic force of the elastic piece 240 ensures that the insertion rod 220 abuts against the bottom of the mounting hole 5, thereby effectively preventing the insertion rod 220 from slipping off.

[0051] It should be noted that the elastic piece 240 can be a spring, and in the connected state and the disconnected state, the elastic piece 240 is in compressive deformation.

[0052] As shown in Figure 1 , Figure 3 , in some embodiments, the guide cylinder 210 is provided with a sliding groove 2101 on both sides, and the sliding groove 2101 penetrates the guide cylinder 210 in the radial direction of the guide cylinder 210; the insertion rod 220 is provided with a sliding block 2201 on both sides, and the sliding block 2201 is inserted into the sliding groove 2101.

[0053] The sliding connection between the insertion rod 220 and the guide cylinder 210 is realized by setting the sliding block 2201 and the sliding groove 2101, and the mutual cooperation of the sliding block 2201 and the sliding groove 2101 provides a guiding effect for the movement of the insertion rod 220, ensuring the reliability and stability of the movement.

[0054] As shown in Figure 1 , Figure 3 , in some embodiments, one end of the elastic piece 240 is connected with the sliding block 2201, and the other end of the elastic piece 240 is connected with one end of the guide cylinder 210 away from the sleeve 10.

[0055] By connecting one end of the elastic piece 240 with the sliding block 2201 as a movable end and connecting the other end of the elastic piece 240 with the guide cylinder 210 as a fixed end, the movable end of the elastic piece 240 moves with the sliding block 2201, so that the length of the elastic piece 240 changes, and the elastic piece 240 deforms to generate elastic force.

[0056] As shown in Figure 1 , Figure 3As shown, in some embodiments, the limiting member 230 includes a stop pin 2301 and a stop pin nut 2302; wherein, in the connected state, the stop pin 2301 passes through the slide groove 2101, and the stop pin nut 2302 is threadedly connected to the stop pin 2301, so that the stop pin 2301 is fixed on the guide cylinder 210 and abuts against one end of the insertion rod 220.

[0057] By connecting the stop pin 2301 and the stop pin nut 2302 with threads, the limiting member 230 is fixed inside the guide cylinder 210, thereby blocking the movement of the insertion rod 220.

[0058] It should be noted that, in the loosened state, rotating the stop nut 2302 removes the stop pin 2301 from the guide cylinder 210, releasing the obstruction. The insertion rod 220 moves under the action of the spring until the slider 2201 abuts against one end of the slide groove 2101. At this time, the insertion rod 220 is inserted into the mounting hole 5 and abuts against the bottom of the mounting hole 5. In addition, the spring is still in a compressed state, thereby ensuring that the mounting hole 5 is connected to the insertion rod 220, and preventing loosening during disassembly, which would affect disassembly.

[0059] like Figures 1-3 As shown, in some embodiments, the sleeve 10 includes a first cylindrical section 110 and a second cylindrical section 120; the second cylindrical section 120 is disposed at the bottom of the first cylindrical section 110, the second cylindrical section 120 is connected to the first cylindrical section 110, and the inner diameter of the second cylindrical section 120 is larger than the inner diameter of the first cylindrical section 110, and the outer diameter of the second cylindrical section 120 is larger than the outer diameter of the first cylindrical section 110; wherein, the connecting member 30 is disposed at the top of the first cylindrical section 110, and the limiting component 20 is disposed on the side of the second cylindrical section 120.

[0060] By setting the first cylindrical section 110 and the second cylindrical section 120, the sleeve 10 can be adapted to the pressure cap, avoiding interference due to unsuitable size, which would prevent the sleeve 10 from being fitted onto the pressure cap.

[0061] It should be noted that the first cylindrical section 110 and the second cylindrical section 120 are cylindrical structures.

[0062] like Figure 1 , Figure 3 As shown, in some embodiments, the connector 30 is a hexagonal shaft.

[0063] By setting a hexagonal shaft as the connector 30, the stability and durability of the connector 30 can be improved, and the mechanical torque provided by the drive component can be reliably transmitted.

[0064] In some embodiments, the driving element is a pneumatic wrench.

[0065] By adopting the pneumatic wrench as the driving member connected with the connecting member 30, the whole dismounting device is driven to rotate, so that the dismounting of the to-be-dismounted member 2 is realized, which not only saves manpower and material resources, but also effectively improves the work efficiency.

[0066] It should be noted that the pneumatic wrench is also called pneumatic air gun. By using compressed air as a power source, the air pressure is converted into rotary power by a pneumatic motor to drive the impact mechanism inside the wrench. This impact mechanism collides with the output shaft at high speed to generate a large torque, which is used for tightening or loosening. The pneumatic wrench has the advantages of small size, light weight, large output power per unit weight, and small reaction force. In addition, the specific structure and working principle of the pneumatic wrench are both prior art, and will not be described herein.

[0067] In some embodiments, the plurality of limiting components 20 correspond to the plurality of mounting holes 5 of the to-be-dismounted member 2 one by one, and the limiting components 20 are inserted into the corresponding mounting holes 5.

[0068] It should be noted that, as shown in Figure 2 , the number of limiting components 20 and mounting holes 5 is four, and the four limiting components 20 are arranged at equal intervals around the sleeve 10 in the circumferential direction, and the four mounting holes 5 are arranged at equal intervals around the to-be-dismounted member 2 in the circumferential direction; so that the dismounting device and the to-be-dismounted member 2 have four connection points and stress points at the same time, so that the to-be-dismounted member 2 is uniformly stressed.

[0069] Embodiment three

[0070] As shown in Figure 5 , the utility model embodiment further provides a plunger pump, comprising a to-be-dismounted member 2, the plunger pump adopts the plunger pump dismounting device 4 of any one of the utility model embodiments to dismount the to-be-dismounted member 2 from the plunger pump, and then has all the technical effects brought by the technical solutions of the above-mentioned embodiments.

[0071] It should be noted that, as shown in Figure 5 , the to-be-dismounted member 2 is a pump head four-hole pipe fitting pressure cap; the plunger pump comprises a pump body 1, and the pump head four-hole pipe fitting pressure cap is installed on the pump body 1; the number of pump head four-hole pipe fitting pressure caps can be multiple, which is not limited by the present application. In addition, the plunger pump further comprises a pressure relief valve 3 connected with the pump body 1.

[0072] As shown in Figure 5 , when the pump head four-hole pipe fitting pressure cap is dismounted, the plunger pump dismounting device 4 is sleeved outside the pump head four-hole pipe fitting pressure cap, a plurality of limiting components 20 correspond to a plurality of mounting holes 5 one by one, the limiting member 230 is removed, and the insertion rod 220 is inserted into the mounting hole 5 under the action of the elastic member 240; the connecting member 30 is connected with the driving member, the driving member drives the plunger pump dismounting device 4 to rotate, the pump head four-hole pipe fitting pressure cap rotates accordingly, and thus the dismounting is completed.

[0073] Although the utility model has been described with reference to the preferred embodiments, various modifications can be made to it without departing from the scope of the utility model and equivalent replacements can be made to the components therein. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A plunger pump disassembly device, characterized by, The device comprises: a sleeve configured to be sleeved on a to-be-disassembled part; a plurality of limiting assemblies arranged on the side of the sleeve and in communication with the sleeve, the limiting assemblies being arranged circumferentially around the sleeve and configured to be movable in the radial direction of the sleeve so as to be inserted into mounting holes of the to-be-disassembled part; a connecting member arranged on the top of the sleeve and configured to be connected with a driving member so as to be driven by the driving member to rotate the sleeve and the to-be-disassembled part in the sleeve. The limiting assembly comprises:

2. The plunger pump disassembly device of claim 1, wherein, a guide cylinder arranged on the side of the sleeve and in communication with the sleeve; a plug rod movably arranged in the guide cylinder; a limiting member detachably arranged on the guide cylinder; and a resilient member sleeved on the plug rod; wherein, in a connected state, the limiting member abuts against the plug rod to block the movement of the plug rod and compress and deform the resilient member; and in a released state, the limiting member is unblocked to release the elastic force of the resilient member and drive the movement of the plug rod so as to insert the plug rod into the mounting hole. The guide cylinder is provided with a sliding groove on both sides thereof, the sliding groove penetrating the guide cylinder in the radial direction of the guide cylinder; the plug rod is provided with a sliding block on both sides thereof, the sliding block being inserted into the sliding groove.

3. The plunger pump disassembly device of claim 2, wherein, One end of the resilient member is connected with the sliding block, and the other end of the resilient member is connected with the end of the guide cylinder away from the sleeve.

4. The plunger pump disassembly device of claim 3, wherein, The limiting member comprises a blocking pin and a blocking pin nut; wherein, in the connected state, the blocking pin penetrates the sliding groove, and the blocking pin nut is threadedly connected with the blocking pin so as to fix the blocking pin on the guide cylinder and abut against one end of the plug rod.

5. The plunger pump disassembly device of claim 3, wherein, The sleeve comprises:

6. A dismantling device of a plunger pump according to any one of claims 1-5, characterized in that, a first cylinder segment; and a second cylinder segment arranged at the bottom of the first cylinder segment, the second cylinder segment being in communication with the first cylinder segment, the inner diameter of the second cylinder segment being greater than that of the first cylinder segment, and the outer diameter of the second cylinder segment being greater than that of the first cylinder segment; wherein, the connecting member is arranged on the top of the first cylinder segment, and the limiting assembly is arranged on the side of the second cylinder segment. The connecting member is a hexagonal shaft.

7. A dismantling device of a plunger pump according to any one of claims 1-5, characterized in that, The driving member is a pneumatic wrench.

8. The plunger pump disassembly device of claim 7, wherein, The plurality of limiting assemblies correspond one-to-one to a plurality of mounting holes of the to-be-disassembled part, and the limiting assemblies are inserted into the corresponding mounting holes.

9. The plunger pump disassembly device of any one of claims 1-5, wherein, The plunger pump adopts the plunger pump disassembling device according to any one of claims 1-9 to disassemble the to-be-disassembled part from the plunger pump.

10. A piston pump comprising a disassembly kit, characterized in that, ​

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