A hydraulic end structure

Abstract

The utility model discloses a kind of hydraulic end structures, pump head and packing box, the packing box is arranged in the one side position of pump head, the quantity of the packing box is three, the inside of the pump head is provided with the drainage valve combination structure corresponding with packing box, the drainage valve combination structure includes valve body, and the both ends of the valve body are respectively provided with drainage valve core and liquid inlet valve core;Multiple radial seals are formed by the two groups of sealing rings on the valve body and the sealing ring on liquid inlet valve core, which ensures the static sealing reliability between the valve body and the inner wall of pump head, and effectively prevents the internal leakage and external leakage of medium under high pressure through multi-level and multi-type sealing design.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic end technology of plunger pumps, and specifically to a hydraulic end structure. Background Technology

[0002] The hydraulic end of a plunger pump is its core working component, responsible for the intake, pressurization, and discharge of the medium. Its performance directly affects the pump's efficiency, reliability, and service life. Under high pressure, high frequency, and when conveying media containing impurities or corrosive substances, traditional hydraulic end structures often face the following challenges: Poor sealing reliability: The dynamic seals between the valve core and valve sleeve, and between the plunger and stuffing box are prone to wear and failure, leading to media leakage. This not only affects pump efficiency but may also cause environmental pollution and safety risks.

[0003] Short valve life: The valve core and valve seat are easily damaged under repeated impacts and wear, requiring frequent replacement, which increases maintenance costs and downtime.

[0004] Insufficient heat dissipation and lubrication: During high-pressure and high-speed operation, a large amount of heat will be generated in the stuffing box area. If the cooling is not good, it will accelerate the aging of the seals and the wear of the plunger.

[0005] Inconvenient maintenance: Traditional hydraulic end structures are complex, and the process of disassembling and replacing vulnerable parts (such as valve cores and seals) is cumbersome, time-consuming, and labor-intensive. Therefore, there is an urgent need for a hydraulic end structure to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a hydraulic end structure to address the aforementioned shortcomings in the prior art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: A hydraulic end structure includes a pump head and a stuffing box. The stuffing box is located on one side of the pump head, and there are three stuffing boxes. The pump head has a drain valve assembly structure corresponding to the stuffing box. The drain valve assembly structure includes a valve body. A drain valve core and an inlet valve core are respectively provided at both ends of the valve body. A drain valve sleeve is provided outside the drain valve core. A groove is provided outside the inlet valve core. A sealing ring is provided inside the groove. Two sets of sealing rings are provided outside the valve body. The two sets of sealing rings are located near both ends of the valve body and are in contact with the inside of the pump head. An inlet valve sleeve is provided outside the inlet valve core. The inlet valve sleeve is snapped onto one end of the valve body. One end of the inlet valve sleeve is located inside the stuffing box, and the other end of the inlet valve sleeve is located inside the stuffing box. A sealing pressure sleeve is provided inside the stuffing box. The sealing pressure sleeve abuts against the inlet valve sleeve. A plunger is movably connected inside the sealing pressure sleeve.

[0008] Preferably, the outer sleeve of the drain valve core is equipped with a drain spring, which is located inside the drain valve sleeve. The outer sleeve of the inlet valve core is equipped with an inlet spring, which is located inside the inlet valve sleeve.

[0009] Preferably, one end of the sealing sleeve is provided with a sealing plug, one end of the sealing plug is engaged with the sealing sleeve, and a locking nut is also provided inside the packing box, the locking nut is screwed to the packing box, and the other end of the sealing plug abuts against the locking nut. Preferably, the outer wall of the locking nut is provided with a second sealing ring, which fits into the packing box.

[0010] Preferably, a water seal ring is provided inside the stuffing box, the water seal ring is located inside the locking nut, and the water seal ring is connected to the sealing sleeve and the sealing plug.

[0011] Preferably, the outer wall of the water seal ring is provided with a sealing ring three, which fits against the inner wall of the locking nut.

[0012] Preferably, the water seal ring includes a cooling water seal, which is located inside the water seal ring.

[0013] In the above technical solution, the hydraulic end structure provided by this utility model (1) is designed to be snap-fit ​​between the inlet valve sleeve and the valve body, and the drain valve and the inlet valve are integrated on one valve body to form an independent "drain valve combination structure", which makes the overall structure compact and easy to disassemble and assemble; (2) through the "water seal ring" and "cooling water seal", the cooling water can circulate in the cavity formed by the water seal ring to lubricate and cool the high-speed reciprocating plunger. This active cooling method ensures that the hydraulic end can operate stably for a long time under harsh working conditions (such as high pressure and high temperature), significantly extending the service life of vulnerable parts such as plunger and sealing packing, and improving the overall economic benefits of the equipment. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 This is a cross-sectional structural schematic diagram of an embodiment of a hydraulic end structure of the present invention.

[0016] Figure 2 This is a schematic diagram of the drainage structure provided for an embodiment of the hydraulic end structure of this utility model.

[0017] Figure 3This is a schematic diagram of a packing box structure provided for an embodiment of a hydraulic end structure of this utility model.

[0018] Explanation of reference numerals in the attached figures: 1. Pump head 2. Sealing ring 3. Drain spring 4. Drain valve core 5. Sealing ring 6. Valve body 7. Inlet valve core 9. Inlet valve sleeve 12. Groove 13. Packing box 14. Sealing sleeve 15. Sealing plug 16. Locking nut 17. Sealing ring II 18. Water seal 19. Sealing ring III 20. Cooling water seal 22. Plunger 61. Drain valve sleeve 31. Drain valve assembly structure. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0020] like Figure 1-3 As shown, this utility model provides a hydraulic end structure, including a pump head 1 and a stuffing box 13. The stuffing box 13 is located on one side of the pump head 1, and there are three stuffing boxes 13. The pump head 1 has a drain valve assembly structure 31 corresponding to the stuffing box 13 inside. The drain valve assembly structure 31 includes a valve body 6, and drain valve core 4 and inlet valve core 7 are respectively provided at both ends of the valve body 6. A drain valve sleeve 61 is provided outside the drain valve core 4, and a groove 12 is provided outside the inlet valve core 7. A sealing ring 2 is provided inside the groove 12. Two sets of sealing rings 5 ​​are provided on the outside of the valve body 6. The two sets of sealing rings 5 ​​are located near the two ends of the valve body 6 respectively. The sealing ring 2 and the sealing ring 5 are in contact with the inside of the pump head 1. An inlet valve sleeve 9 is provided on the outside of the inlet valve core 7. The inlet valve sleeve 9 is snapped onto one end of the outside of the valve body 6. One end of the inlet valve sleeve 9 is located inside the stuffing box 13, and the other end of the inlet valve sleeve 9 is located inside the stuffing box 13. A sealing pressure sleeve 14 is provided inside the stuffing box 13. The sealing pressure sleeve 14 abuts against the inlet valve sleeve 9. A plunger 22 is movably connected inside the sealing pressure sleeve 14.

[0021] In this specific embodiment, the packing box 13 is located on one side of the pump head 1. There are three packing boxes 13. The pump head 1 has a drain valve assembly structure 31 corresponding to the packing box 13 inside. The drain valve assembly structure 31 includes a valve body 6. A drain valve core 4 and an inlet valve core 7 are respectively provided at both ends of the valve body 6. A drain valve sleeve 61 is provided outside the drain valve core 4. A groove 12 is provided outside the inlet valve core 7. A sealing ring 2 is provided inside the groove 12. Two sets of sealing rings 5 ​​are provided outside the valve body 6. The two sets of sealing rings 5 ​​are located near both ends of the valve body 6. The sealing rings 2 and 5 are fitted inside the pump head 1. An inlet valve sleeve 9 is provided outside the inlet valve core 7. The inlet valve sleeve 9 is snapped onto one end of the valve body 6. One end of the inlet valve sleeve 9 is located inside the stuffing box 13, and the other end of the inlet valve sleeve 9 is located inside the stuffing box 13. A sealing sleeve 14 is provided inside the stuffing box 13. The sealing sleeve 14 abuts against the inlet valve sleeve 9. A plunger 22 is movably connected inside the sealing sleeve 14. The two sets of sealing rings on the valve body and the sealing ring on the inlet valve core form a multi-radial seal, ensuring the static sealing reliability between the valve body and the inner wall of the pump head. The stuffing box adopts a combination structure of sealing sleeve, sealing plug and locking nut, which can effectively compress and seal the packing of the plunger, and can compensate for wear by adjusting the locking nut, maintaining a long-term stable sealing effect. The sealing ring 2 on the outer wall of the locking nut and the sealing ring 3 on the outer wall of the water seal ring further prevent the medium from leaking along the thread gap.

[0022] Preferably, the outer sleeve of the drain valve core 4 is equipped with a drain spring 3, which is located inside the drain valve sleeve 1. The outer sleeve of the inlet valve core 7 is equipped with an inlet spring 8, which is located inside the inlet valve sleeve 9.

[0023] Preferably, a sealing plug 15 is provided at one end of the sealing sleeve 14, and one end of the sealing plug 15 is snapped into the sealing sleeve 14. A locking nut 16 is also provided inside the packing box 13, and the locking nut 16 is screwed into the packing box 13. The other end of the sealing plug 15 abuts against the locking nut 16. Preferably, the outer wall of the locking nut 16 is provided with a sealing ring 2 17, which fits into the packing box 13.

[0024] Preferably, a water seal ring 18 is provided inside the stuffing box 13. The water seal ring 18 is located inside the locking nut 16 and is connected to the sealing sleeve 14 and the sealing plug 15.

[0025] Preferably, the outer wall of the water seal ring 18 is provided with a sealing ring 3 19, which fits against the inner wall of the locking nut 16.

[0026] Preferably, the water seal ring 18 includes a cooling water seal 20, which is located inside the water seal ring 18.

[0027] The inlet valve sleeve 9 of this utility model is snapped onto the valve body 6, and one end extends into the packing box 13. This modular design allows the entire valve assembly to be installed and disassembled as a whole or as an easily disassembled unit.

[0028] When it is necessary to replace the valve core, spring or seal, it can be done relatively independently without the need for large-scale disassembly of the entire pump head, which greatly reduces the complexity and time cost of maintenance work.

[0029] Example 1 A hydraulic end structure includes three stuffing boxes 13 located on one side of a pump head 1. Inside the pump head 1 is a drain valve assembly 31 corresponding to the stuffing boxes 13. The drain valve assembly 31 includes a valve body 6, with a drain valve core 4 and an inlet valve core 7 at each end. A drain valve sleeve 61 is provided outside the drain valve core 4. A groove 12 is provided outside the inlet valve core 7, with a sealing ring 2 inside the groove 12. Two sets of sealing rings 5 ​​are provided outside the valve body 6, located near both ends of the valve body 6. The sealing rings 2 and 5 fit against the interior of the pump head 1. An inlet valve sleeve 9 is provided outside the inlet valve core 7, snapped onto one end of the valve body 6. One end of the inlet valve sleeve 9 is located inside the stuffing box 13, and the other end of the inlet valve sleeve 9 is located inside the stuffing box 13. A sealing sleeve 14 is provided inside the stuffing box 13. The sealing sleeve 14 abuts against the inlet valve sleeve 9. A plunger 22 is movably connected inside the sealing sleeve 14. The two sets of sealing rings on the valve body and the sealing ring on the inlet valve core form a multi-radial seal, ensuring the static sealing reliability between the valve body and the inner wall of the pump head. The stuffing box adopts a combination structure of sealing sleeve, sealing plug and locking nut, which can effectively compress and seal the packing of the plunger, and can compensate for wear by adjusting the locking nut, maintaining a long-term stable sealing effect. The sealing ring 2 on the outer wall of the locking nut and the sealing ring 3 on the outer wall of the water seal ring further prevent the medium from leaking along the thread gap.

[0030] Example 2 This embodiment further defines the features of Embodiment 1. The outer sleeve of the drain valve core 4 is equipped with a drain spring 3, which is located inside the drain valve sleeve 1. The outer sleeve of the inlet valve core 7 is fitted with an inlet spring 8, which is located inside the inlet valve sleeve 9. One end of the sealing sleeve 14 is provided with a sealing plug 15, which engages with the sealing sleeve 14. A locking nut 16 is also provided inside the packing box 13, and is screwed onto the packing box 13. The other end of the sealing plug 15... The locking nut 16 abuts against the locking nut 16. The outer wall of the locking nut 16 is provided with a second sealing ring 17. The second sealing ring 17 fits against the packing box 13. The packing box 13 is provided with a water seal ring 18. The water seal ring 18 is located inside the locking nut 16. The water seal ring 18 communicates with the sealing sleeve 14 and the sealing plug 15. The outer wall of the water seal ring 18 is provided with a third sealing ring 19. The third sealing ring 19 fits against the inner wall of the locking nut 16. The water seal ring 18 includes a cooling water seal 20. The cooling water seal 20 is located inside the water seal ring 18.

[0031] The inlet valve sleeve 9 of this utility model is snapped onto the valve body 6, and one end extends into the packing box 13. This modular design allows the entire valve assembly to be installed and disassembled as a whole or as an easily disassembled unit.

[0032] When it is necessary to replace the valve core, spring or seal, it can be done relatively independently without the need for large-scale disassembly of the entire pump head, which greatly reduces the complexity and time cost of maintenance work.

[0033] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A hydraulic end structure, characterized in that, The pump head (1) and a stuffing box (13) are included. The stuffing box (13) is located on one side of the pump head (1). There are three stuffing boxes (13). The pump head (1) is equipped with a drain valve assembly structure (31) corresponding to the stuffing box (13). The drain valve assembly structure (31) includes a valve body (6). The two ends of the valve body (6) are respectively provided with a drain valve core (4) and an inlet valve core (7). The drain valve core (4) is provided with a drain valve sleeve (61). The inlet valve core (7) is provided with a groove (12). The groove (12) is provided with a sealing ring (2). The valve body (6) is provided with two sets of The sealing ring (5) has two sets of sealing rings (5) located near the two ends of the valve body (6). The sealing ring (2) and the sealing ring (5) are in contact with the inside of the pump head (1). The inlet valve core (7) is provided with an inlet valve sleeve (9). The inlet valve sleeve (9) is snapped onto one end of the valve body (6). One end of the inlet valve sleeve (9) is located inside the packing box (13). The other end of the inlet valve sleeve (9) is located inside the packing box (13). The inside of the packing box (13) is provided with a sealing pressure sleeve (14). The sealing pressure sleeve (14) abuts against the inlet valve sleeve (9). The inside of the sealing pressure sleeve (14) is movably connected with a plunger (22).

2. The hydraulic end structure according to claim 1, characterized in that, The outer sleeve of each drain valve core (4) is equipped with a drain spring (3), which is located inside the drain valve sleeve (61). The outer sleeve of each inlet valve core (7) is equipped with an inlet spring (8), which is located inside the inlet valve sleeve (9).

3. The hydraulic end structure according to claim 2, characterized in that, One end of the sealing sleeve (14) is provided with a sealing plug (15), one end of the sealing plug (15) is engaged with the sealing sleeve (14), and a locking nut (16) is also provided inside the packing box (13), the locking nut (16) is screwed to the packing box (13), and the other end of the sealing plug (15) abuts against the locking nut (16).

4. The hydraulic end structure according to claim 3, characterized in that, The outer wall of the locking nut (16) is provided with a sealing ring two (17), which is in contact with the packing box (13).

5. The hydraulic end structure according to claim 1, characterized in that, The packing box (13) is provided with a water seal ring (18) inside. The water seal ring (18) is located inside the locking nut (16). The water seal ring (18) is connected to the sealing sleeve (14) and the sealing plug (15).

6. The hydraulic end structure according to claim 5, characterized in that, The outer wall of the water seal ring (18) is provided with a sealing ring three (19), which is in contact with the inner wall of the locking nut (16).

7. The hydraulic end structure according to claim 5, characterized in that, The water seal ring (18) includes a cooling water seal (20) located inside the water seal ring (18).

Images