Detachable fluid end piston

Abstract

The invention relates to the technical field of valve assemblies, and discloses a detachable fluid end piston which comprises a valve box, a piston rod and a piston rod. Plunger heads are movably matched with the interiors of the power pipes, the power pipes are communicated with the liquid inlet pipe / the liquid outlet pipe respectively, and a communicating pipe is connected between the power pipes; the sealing plate is arranged at the end, away from the liquid inlet pipe / liquid outlet pipe, of the power pipe, and a piston rod is connected to one end of the plunger head and penetrates through the sealing plate; the lantern ring is arranged outside the valve box in a sleeving mode and detachably connected with the valve box, a connecting assembly is arranged on the lantern ring, the connecting end of the connecting assembly is selectively connected with the sealing plate in a clamped mode or an elastic mode, when the connecting end is connected with the sealing plate in a clamped mode, the sealing plate is fixed to the valve box, and when the connecting end is elastically connected with the sealing plate, the sealing plate is detachably connected with the valve box; the sleeve is detachably connected with the lantern ring, and the end, extending out of the power pipe, of the piston rod is movably matched in the sleeve. The hydraulic end piston can be conveniently disassembled.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valve assemblies, in particular to a detachable hydraulic end piston. BACKGROUND

[0002] The plunger head pump or piston pump is a common pump form, which drives the plunger head through the piston rod to reciprocate in the pump body to form a cyclically changing negative pressure suction and pressurized delivery effect, so as to enter the liquid from the inlet end and pass out from the outlet end.

[0003] The piston located at the liquid delivery end is easy to be eroded due to direct or indirect contact with the liquid, so it needs to be disassembled and replaced after a period of use. In the prior art such as the valve assembly, plunger head pump and piston pump with patent No. CN207229370U, the valve body is arranged in the hole part, and the plunger head is also reciprocatingly connected in the hole part. Although the volume of the valve body can be reduced and the overall strength can be enhanced, the plunger head is not convenient to disassemble, which causes certain inconvenience in replacing and maintaining the hydraulic end piston. Therefore, there is an urgent need for a detachable hydraulic end piston to solve the above problems. SUMMARY

[0004] The purpose of the present application is to provide a detachable hydraulic end piston to solve the problems existing in the prior art and to facilitate the disassembly of the hydraulic end piston.

[0005] To achieve the above purpose, the present application provides the following scheme: the present application provides a detachable hydraulic end piston, which comprises:

[0006] A valve box is provided with a liquid inlet pipe and a liquid outlet pipe on one side;

[0007] A pair of power pipes are movably connected with the plunger head and are respectively connected with the liquid inlet pipe / liquid outlet pipe, and a communication pipe is connected between the pair of power pipes;

[0008] A sealing plate is arranged at one end of the power pipe away from the liquid inlet pipe / liquid outlet pipe, one end of the plunger head is connected with a piston rod, and the piston rod penetrates the sealing plate;

[0009] A sleeve ring is detachably connected with the valve box, a connecting assembly is arranged on the sleeve ring, and the connecting end of the connecting assembly is selectively connected with the sealing plate or elastically connected with the sealing plate, wherein when the connecting end is connected with the sealing plate, the sealing plate is fixed with the valve box, and when the connecting end is elastically connected with the sealing plate, the sealing plate is detachably connected with the valve box;

[0010] A sleeve pipe is detachably connected with the sleeve ring, and one end of the piston rod extending out of the power pipe is movably connected in the sleeve pipe.

[0011] Preferably, the connection component includes:

[0012] A connecting ring is fixedly attached to the end face of the valve box near the sealing plate. A slot is provided on the side wall of the connecting plate. A support plate is fixedly attached to the end face of the sealing plate. The support plate is slidably connected to the slot.

[0013] A pair of clamping plates are disposed opposite to each other on both sides of the inner ring of the collar. The clamping plates are elastically connected to the collar. The collar is sleeved on the outside of the connecting ring. A through groove is formed on the connecting ring along the side wall of the slot. The clamping plates are slidably connected in the through groove. The bottom end of the clamping plate extends into the slot and has a beveled edge, and the highest end of the beveled edge extends out of the through groove. The support plate is clamped to the slot through the clamping plates.

[0014] Preferred options also include:

[0015] The spring piece has a groove on the inner ring side of the collar, and the retaining plates slide in the grooves one by one. The spring piece is fixed in the groove, and one end of the spring piece extends obliquely outward toward the groove and is fixed to the retaining plate.

[0016] Preferably, a disassembly ring is fixedly connected to the outer circumference of the sleeve. The disassembly ring has the same diameter as the sleeve ring, and a plurality of first locking bolts are screwed at equal intervals around the side wall of the disassembly ring. The first locking bolts are used to fix the disassembly ring to the sleeve ring.

[0017] In this configuration, the projection of any one of the first locking bolts along the horizontal direction is located within the groove, and the first locking bolt extends into the groove and abuts against the side of the spring piece away from the card plate.

[0018] Preferably, the portion of the collar located on the outer side of the valve box is screwed with a plurality of second locking bolts at equal intervals in the circumferential direction, the second locking bolts being used to fix the collar to the valve box.

[0019] Preferably, a compression ring is provided at the connection between the sealing plate and the power pipe, and a sealing ring is sleeved on the portion of the piston rod that passes through the sealing plate. The sealing ring is fixed to the sealing plate and slides with the piston rod.

[0020] Preferred options also include:

[0021] A connecting seat is disposed between a pair of power pipes, and the connecting seat is fixedly connected to the power pipes;

[0022] The third locking bolt passes through the valve box and the connecting seat in a horizontal direction, and a groove is provided on the adjacent side of the pair of power pipes. The part of the third locking bolt that extends into the valve box is embedded between the two grooves.

[0023] Preferably, the valve box inner wall is fixedly connected to the opposite sides of the valve seat, and the mutually distant sides of the pair of power pipes are embedded between the two valve seats. The valve seat is provided with a clamp, and the clamp end of the clamp is connected to the third locking bolt.

[0024] Preferably, the clamp component includes:

[0025] A pair of fourth locking bolts are threaded through the valve box in a vertical direction and are symmetrically distributed on both sides of the third locking bolt. There are two pairs of fourth locking bolts symmetrically distributed along the center of the pillow seat.

[0026] A hoop is fitted onto the third locking bolt, and elastic clamps are fixed to both ends of the hoop. The elastic clamps are engaged and fixed with the adjacent fourth locking bolt.

[0027] Preferably, the sleeve extends in a direction away from the valve box, and a pull rod is movably fitted inside the sleeve, with the end of the pull rod fixedly connected to the two piston rods.

[0028] The present invention discloses the following technical effects:

[0029] This invention achieves suction and pumping by fixing the piston rod and plunger head together and utilizing the reciprocating motion of the plunger head within the power pipe. When the piston rod and plunger head need replacement or maintenance after prolonged use, a sealing plate seals the power pipe. The sealing plate is detachably connected to the valve box, facilitating the opening of the power pipe and disassembly of the piston rod and plunger head. Furthermore, by incorporating a collar and connecting assembly, the connecting end of the assembly has switchable snap-fit ​​or elastic connection. When the sealing plate needs to be disassembled, the connecting assembly is elastically connected to the sealing plate, facilitating disassembly by personnel. Simultaneously, when the connecting assembly is snap-fitted with the sealing plate, the sealing plate is fixed relative to the valve box, effectively sealing the power pipe and enhancing sealing performance. This ensures the effective use of the piston structure while facilitating disassembly. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the overall device in this invention;

[0032] Figure 2 This is a diagram showing the connection relationship between the piston rod and the sealing plate in this invention;

[0033] Figure 3 This is a diagram showing the connection relationship between the fourth locking bolt and the hoop in this invention;

[0034] Figure 4 This is a diagram showing the connection relationship between the sealing plate and the valve box in this invention;

[0035] Figure 5 This is a diagram showing the connection relationship between the card plate and the connecting ring in this invention;

[0036] Figure 6 This is a diagram showing the connection relationship between the power pipe and the connecting pipe in this invention;

[0037] Figure 7 This is a diagram showing the connection relationship between the power pipe and the extrusion ring in this invention;

[0038] Figure 8 This is a diagram showing the connection relationship between the plunger head and the piston rod in this invention;

[0039] The components are as follows: 1. Valve box; 2. Inlet pipe; 3. Outlet pipe; 4. Power pipe; 5. Plunger head; 6. Connecting pipe; 7. Sealing plate; 8. Piston rod; 9. Collar; 10. Sleeve; 11. Connecting ring; 12. Support plate; 13. Groove; 14. Clamping plate; 15. Through groove; 16. Spring; 17. Disassembly ring; 18. First locking bolt; 19. Second locking bolt; 20. Extrusion ring; 21. Sealing ring; 22. Connecting seat; 23. Third locking bolt; 24. Pillow seat; 25. Fourth locking bolt; 26. Hoop ring; 27. Elastic clamp; 28. Pull rod; 29. ​​Bellows; 30. Sealing block; 31. Fastening rod; 32. Sealing ring. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] Reference Figures 1-7 The present invention provides a detachable hydraulic end piston, comprising:

[0043] Valve box 1, with an inlet pipe 2 and an outlet pipe 3 connected to one side respectively; a pair of power pipes 4, each with a plunger head 5 internally connected to the inlet pipe 2 and the outlet pipe 3 respectively, and a connecting pipe 6 connecting the pair of power pipes 4; a sealing plate 7, located at the end of the power pipe 4 away from the inlet pipe 2 and the outlet pipe 3, with a piston rod 8 connected to one end of the plunger head 5, and the piston rod 8 passing through the sealing plate 7; a collar 9, sleeved outside the valve box 1 and detachably connected to the valve box 1, with a connecting component on the collar 9, the connecting end of the connecting component selectively engaging or elastically connecting with the sealing plate 7, wherein when the connecting end engages with the sealing plate 7, the sealing plate 7 is fixed to the valve box 1, and when the connecting end is elastically connected with the sealing plate 7, the sealing plate 7 is detachably connected to the valve box 1; a sleeve 10, detachably connected to the collar 9, with one end of the piston rod 8 extending out of the power pipe 4 movably engaged inside the sleeve 10.

[0044] This invention achieves suction and pumping by fixing the piston rod 8 to the plunger head 5 and utilizing the reciprocating motion of the plunger head 5 within the power pipe 4. When the piston rod 8 and plunger head 5 need to be replaced or repaired after prolonged use, the power pipe 4 is sealed using a sealing plate 7. The sealing plate 7 is detachably connected to the valve box 1, facilitating the opening of the power pipe 4 and disassembly of the piston rod 8 and plunger head 5. Furthermore, by providing a collar 9 and a connecting assembly, the connecting end of the connecting assembly has a switchable snap-fit ​​or elastic connection. When the sealing plate 7 needs to be disassembled, the connecting assembly is elastically connected to the sealing plate 7, facilitating disassembly by personnel. Simultaneously, when the connecting assembly is snap-fitted to the sealing plate 7, the sealing plate 7 is fixed relative to the valve box 1, thereby effectively sealing the power pipe 4 and enhancing the sealing performance. While facilitating disassembly, this invention ensures the effective use of the piston structure.

[0045] The present invention connects the valve box 1 to the inlet pipe 2 and the outlet pipe 3, and sets up a pair of power pipes 4 to be connected to the inlet pipe 2 and the outlet pipe 3 respectively. The power pipes 4 are connected to each other by the connecting pipe 6. The piston rod 8 drives the plunger head 5 to reciprocate, forming a cyclic negative pressure suction and pressurized delivery effect in the power pipe 4. The liquid flows along the direction from the inlet pipe 2 to the outlet pipe 3 by the one-way valve. It is a conventional technical means and will not be described in detail.

[0046] In one embodiment of this technical solution, reference is made to... Figure 8The plunger head 5 and the piston rod 8 are detachably connected. A sealing block 30 is fixed to one end of the piston rod 8 near the plunger head 5. The outer periphery of the sealing block 30 is threaded, and a connecting groove is provided on the end face of the plunger head 5 near the sealing block 30. The sealing block 30 extends into the connecting groove and is threadedly connected to the plunger head 5. A fastening rod 31 is fixed to the center of the connecting groove and is embedded in the sealing block 30. A sealing ring 32 is fitted and fixed to the outer periphery of the piston rod 8 and abuts against the plunger head 5, thereby realizing the detachable connection between the piston rod 8 and the plunger head 5 and effectively ensuring the sealing performance between the two.

[0047] Furthermore, the connection components include:

[0048] A connecting ring 11 is fixedly connected to the end face of the valve box 1 near the sealing plate 7. A slot 13 is provided on the side wall of the connecting plate. A support plate 12 is fixedly connected to the end face of the sealing plate 7. The support plate 12 is slidably connected to the slot 13.

[0049] A pair of clamping plates 14 are arranged opposite each other on both sides of the inner ring of the collar 9. The clamping plates 14 are elastically connected to the collar 9. The collar 9 is sleeved on the outside of the connecting ring 11. A through groove 15 is provided on the side wall of the slot 13 of the connecting ring 11. The clamping plates 14 are slidably connected in the through groove 15. The bottom end of the clamping plate 14 extends into the slot 13 and has a beveled edge. The highest end of the beveled edge extends out of the through groove 15. The support plate 12 is clamped to the slot 13 through the clamping plates 14.

[0050] Specifically, the end of the clamping plate 14 that extends into the slot 13 has a bevel, and the highest end of the bevel extends out of the through slot 15. It is sleeved on the outside of the connecting ring 11 by a collar 9 and slides with the connecting ring 11. When it is necessary to disassemble the sealing plate 7, the collar 9 is rotated along the highest end of the bevel of the clamping plate 14. The collar 9 drives the clamping plate 14 to rotate and squeezes the clamping plate 14 through the edge of the through slot 15. The clamping plate 14 moves from the highest end to the lowest end of the bevel of the clamping plate 14 and extends out of the through slot 15, so that the clamping plate 14 is no longer in contact with the support plate 12. At this time, the sealing plate 7 and the support plate 12 can be directly separated from the connecting ring 11 along the opening direction of the slot 13, and the sealing plate 7 can be disassembled.

[0051] Furthermore, it also includes:

[0052] The spring piece 16 and the inner ring 9 have grooves. The retaining plate 14 slides in the grooves one by one. The spring piece 16 is fixed in the grooves. One end of the spring piece 16 extends outward from the groove and is fixed in place with the retaining plate 14.

[0053] By fixing the spring piece 16 in the groove, the spring piece 16 elastically supports the clamping plate 14, and the clamping plate 14 is elastically slid in the groove. When the collar 9 is rotated, the inclined edge of the clamping plate 14 is squeezed along the opening of the through groove 15 of the connecting ring 11, gradually squeezing the clamping plate 14 into the groove, and finally extending the clamping plate 14 out of the through groove 15, so that the clamping plate 14 no longer clamps the support plate 12.

[0054] Furthermore, a disassembly ring 17 is fixedly connected to the outer circumference of the sleeve 10. The disassembly ring 17 has the same diameter as the sleeve 9, and a number of first locking bolts 18 are screwed at equal intervals around the side wall of the disassembly ring 17. The first locking bolts 18 are used to fix the disassembly ring 17 to the sleeve 9.

[0055] In this case, the projection of any one of the first locking bolts 18 along the horizontal direction is located in the groove, and the first locking bolt 18 extends into the groove and abuts against the side of the spring piece 16 away from the card plate 14.

[0056] By fixing the disassembly ring 17 to the sleeve 10, the disassembly ring 17 and the collar 9 are docked and fixed. Several first locking bolts 18 are threaded to the side wall of the collar 9, and the collar 9 and the disassembly ring 17 are fixed to the sleeve 10. In addition, in this technical solution, the two oppositely distributed first locking bolts 18 can extend into the groove and, while being threaded to and fixed to the collar 9, abut against the spring piece 16 in the direction opposite to the clamping plate 14, thereby providing rigid support for the spring piece 16, improving the clamping stability of the clamping plate 14 to the support plate 12, and thus improving the sealing performance of the sealing plate 7 to the power pipe 4.

[0057] Furthermore, the portion of the collar 9 located on the outer side of the valve box 1 is screwed with several second locking bolts 19 at equal intervals in the circumferential direction. The second locking bolts 19 are used to fix the collar 9 to the valve box 1.

[0058] Several second locking bolts 19 are threaded through the collar 9 and threadedly connected to the valve box 1, thereby detachably connecting and fixing the collar 9 to the valve box 1.

[0059] Furthermore, a compression ring 20 is provided at the connection between the sealing plate 7 and the power pipe 4, and a sealing ring 21 is sleeved on the part of the piston rod 8 that passes through the sealing plate 7. The sealing ring 21 is fixed to the sealing plate 7 and slides with the piston rod 8.

[0060] Specifically, both the compression ring 20 and the sealing ring 21 are made of rubber. The support plate 12 is fixed by the clamping plate 14, so that the sealing plate 7 tends to move towards the power pipe 4, forming a squeezing effect on both sides of the compression ring 20, thereby achieving efficient sealing of the power pipe 4.

[0061] Furthermore, it also includes:

[0062] A connecting seat 22 is disposed between a pair of power pipes 4, and the connecting seat 22 is fixedly connected to the power pipes 4;

[0063] The third locking bolt 23 passes through the valve box 1 and the connecting seat 22 in the horizontal direction, and a groove is provided on the side of the pair of power pipes 4 that are close to each other. The part of the third locking bolt 23 that extends into the valve box 1 is embedded between the two grooves.

[0064] Furthermore, the inner wall of the valve box 1 is fixedly connected to the opposite sides of the pillow seat 24, and the mutually distant sides of the power pipe 4 are embedded between the two pillow seats 24. The pillow seat 24 is provided with a clamp, and the clamp end of the clamp is connected to the third locking bolt 23.

[0065] In this technical solution, a pair of power pipes 4 are connected and fixed using a connecting seat 22. The connecting seat 22 is adapted to the outer wall structure of the power pipe 4. At the same time, a pillow seat 24 is fixed inside the valve box 1, and the pillow seat 24 is also fitted and matched with the outer side of the power pipe 4, which improves the overall connection between the pair of power pipes 4 and the valve box 1. Furthermore, a third locking bolt 23 is connected through the valve box 1, and the third locking bolt 23 passes through the connecting seat 22 in a horizontal direction. Both sides are respectively embedded on the mutually close sides of the pair of power pipes 4, thereby achieving stable support for the power pipes 4.

[0066] In this technical solution, the end of the power pipe 4 extending out of the valve box 1 is connected and fixed to the inlet pipe 2 and the outlet pipe 3 respectively through the bellows 29; or it can be directly connected and fixed to the inlet pipe 2 and the outlet pipe 3, and the inlet pipe 2 and the outlet pipe 3 are fixedly connected to the valve box 1.

[0067] Furthermore, the clamp components include:

[0068] A pair of fourth locking bolts 25 are threaded through the valve box 1 in the vertical direction and are symmetrically distributed on both sides of the third locking bolt 23 along the center. Among them, there are two pairs of fourth locking bolts 25 symmetrically distributed along the center of the pillow seat 24.

[0069] The hoop 26 is fitted onto the third locking bolt 23. Both ends of the hoop 26 are fixed with elastic clamps 27, which are engaged and fixed with the adjacent fourth locking bolt 25.

[0070] By threading two pairs of fourth locking bolts 25 through the valve box 1, the fourth locking bolts 25 are distributed vertically, making the fourth locking bolts 25 perpendicular to the third locking bolts 23. By fitting a hoop 26 on the part of the third locking bolt 23 that passes through the valve box 1, and by fixing elastic clamps 27 on opposite sides of the hoop 26, the elastic clamps 27 can be separated along the center and can clamp and fix the fourth locking bolts 25, thereby fixing the fourth locking bolts 25 to the pillow seat 24 while also reinforcing the third locking bolts 23.

[0071] Furthermore, the sleeve 10 extends in a direction away from the valve box 1, and a pull rod 28 is movably fitted inside the sleeve 10. The end of the pull rod 28 is fixedly connected to the two piston rods 8.

[0072] Specifically, the pull rod 28 provides reciprocating power through the power structure, and drives the two piston rods 8 to reciprocate, forming a negative pressure suction and pressurized delivery effect in the power pipe 4. By setting one-way valves (not shown in the figure) in the inlet pipe 2, the connecting pipe 6 and the outlet pipe 3 respectively, the pumped liquid is transported along the direction of inlet pipe 2 - power pipe 4 adjacent to inlet pipe 2 - connecting pipe 6 - another power pipe 4 - outlet pipe 3.

[0073] This invention provides a working principle for a detachable hydraulic end piston:

[0074] When disassembling the piston rod 8, first tighten the first locking bolt 18 to remove the disassembly ring 17 and sleeve 10 from the valve box 1. Then tighten the second locking bolt 19 to allow the collar 9 to rotate relative to the valve box 1. By rotating the collar 9 along the highest end of the inclined side of the clamping plate 14, the through groove 15 of the connecting ring 11 presses against the inclined side of the clamping plate 14. The collar 9 moves along the highest end to the lowest end of the inclined side of the clamping plate 14 and extends out of the through groove 15, so that the clamping plate 14 is no longer in contact with the support plate 12. At this time, the sealing plate 7 and the support plate 12 are directly separated from the connecting ring 11 along the opening direction of the slot 13, and the piston rod 8 and plunger head 5 can be removed from the power pipe 4.

[0075] In addition, when fixing the sleeve 10 and removing the ring 17, the two oppositely distributed first locking bolts 18 can extend into the groove and, while being threadedly fixed to the collar 9, abut against the spring piece 16 in the direction opposite to the clamping plate 14, thereby providing rigid support for the spring piece 16, improving the clamping stability of the clamping plate 14 on the support plate 12, and through the clamping and fixing of the clamping plate 14 on the support plate 12, the sealing plate 7 forms a tendency to move towards the power pipe 4, forming a squeezing effect on both sides of the compression ring 20, achieving efficient sealing of the power pipe 4, and through the valve box 1... Two pairs of fourth locking bolts 25 are threaded through and distributed vertically, making the fourth locking bolts 25 perpendicular to the third locking bolts 23. A hoop 26 is fitted on the part of the third locking bolt 23 that passes through the valve box 1, and elastic clamps 27 are fixed on opposite sides of the hoop 26. The elastic clamps 27 can separate along the center and can clamp and fix the fourth locking bolts 25. Thus, while the fourth locking bolts 25 fix the pillow seat 24, they can also reinforce the third locking bolts 23.

[0076] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0077] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A detachable hydraulic end piston, characterized in that, include: The valve box (1) has an inlet pipe (2) and an outlet pipe (3) connected to one side respectively; A pair of power tubes (4) are fitted with plunger heads (5) and are respectively connected to the inlet tube (2) / outlet tube (3). A connecting tube (6) is connected between the pair of power tubes (4). A sealing plate (7) is provided at one end of the power pipe (4) away from the inlet pipe (2) / outlet pipe (3), and a piston rod (8) is connected to one end of the plunger head (5), and the piston rod (8) passes through the sealing plate (7); A collar (9) is sleeved outside the valve box (1) and detachably connected to the valve box (1). A connecting component is provided on the collar (9). The connecting end of the connecting component is selectively snapped or elastically connected to the sealing plate (7). When the connecting end is snapped to the sealing plate (7), the sealing plate (7) is fixed to the valve box (1). When the connecting end is elastically connected to the sealing plate (7), the sealing plate (7) is detachably connected to the valve box (1). The sleeve (10) is detachably connected to the collar (9), and the piston rod (8) extends out of the power tube (4) and is movably fitted inside the sleeve (10).

2. The detachable hydraulic end piston according to claim 1, characterized in that, The connection component includes: A connecting ring (11) is fixedly connected to the end face of the valve box (1) near the sealing plate (7). A slot (13) is provided on the side wall of the connecting plate. A support plate (12) is fixedly connected to the end face of the sealing plate (7). The support plate (12) slides with the slot (13). A pair of clamping plates (14) are arranged opposite to each other on both sides of the inner ring (9). The clamping plates (14) are elastically connected to the ring (9). The ring (9) is sleeved on the outside of the connecting ring (11). A through groove (15) is provided on the connecting ring (11) along the side wall of the slot (13). The clamping plates (14) are slidably connected in the through groove (15). The bottom end of the clamping plate (14) extends into the slot (13) and has a beveled edge. The highest end of the beveled edge extends out of the through groove (15). The support plate (12) is clamped to the slot (13) through the clamping plates (14).

3. The detachable hydraulic end piston according to claim 2, characterized in that, Also includes: The spring piece (16) has a groove on the inner ring side of the collar (9), and the locking plate (14) slides in the groove one by one. The spring piece (16) is fixed in the groove, and one end of the spring piece (16) extends obliquely outward toward the groove and is fixed to the locking plate (14).

4. The detachable hydraulic end piston according to claim 3, characterized in that: The sleeve (10) is provided with a disassembly ring (17) fixedly connected to the outer circumference. The disassembly ring (17) has the same diameter as the sleeve (9), and a number of first locking bolts (18) are screwed at equal intervals around the side wall of the disassembly ring (17). The first locking bolts (18) are used to fix the disassembly ring (17) and the sleeve (9). In this case, the projection of any one of the first locking bolts (18) along the horizontal direction is located in the groove, and the first locking bolt (18) extends into the groove and abuts against the side of the spring piece (16) away from the card plate (14).

5. The detachable hydraulic end piston according to claim 1, characterized in that: The collar (9) located on the outer side of the valve box (1) is screwed with several second locking bolts (19) at equal intervals in the circumferential direction. The second locking bolts (19) are used to fix the collar (9) to the valve box (1).

6. The detachable hydraulic end piston according to claim 1, characterized in that: A compression ring (20) is provided at the connection between the sealing plate (7) and the power pipe (4), and a sealing ring (21) is provided on the part of the piston rod (8) that passes through the sealing plate (7). The sealing ring (21) is fixed to the sealing plate (7) and slides with the piston rod (8).

7. The detachable hydraulic end piston according to claim 1, characterized in that, Also includes: A connecting seat (22) is disposed between a pair of power pipes (4), and the connecting seat (22) is fixedly connected to the power pipes (4); The third locking bolt (23) passes through the valve box (1) and the connecting seat (22) in the horizontal direction, and a groove is provided on the adjacent side of the pair of power pipes (4). The part of the third locking bolt (23) extending into the valve box (1) is embedded between the two grooves.

8. The detachable hydraulic end piston according to claim 7, characterized in that: The valve box (1) has a pillow seat (24) fixed to the opposite sides of the inner wall. The two power pipes (4) are embedded between the two pillow seats (24) on opposite sides. The pillow seat (24) is provided with a clamp, and the clamp end of the clamp is connected to the third locking bolt (23).

9. The detachable hydraulic end piston according to claim 8, characterized in that, The clamp component includes: A pair of fourth locking bolts (25) are threaded through the valve box (1) in the vertical direction and are symmetrically distributed on both sides of the third locking bolt (23) along the center. There are two pairs of fourth locking bolts (25) symmetrically distributed along the center of the pillow seat (24). A hoop (26) is fitted onto the third locking bolt (23). Both ends of the hoop (26) are fixed with elastic clamps (27), which are engaged and fixed with the adjacent fourth locking bolt (25).

10. The detachable hydraulic end piston according to claim 1, characterized in that: The sleeve (10) extends away from the valve box (1), and a pull rod (28) is movably fitted inside the sleeve (10). The end of the pull rod (28) is fixedly connected to the two piston rods (8).

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