A check valve for an ultra-high pressure plunger pump

Abstract

This utility model provides a one-way valve for an ultra-high pressure plunger pump, including a one-way valve body, a low-pressure mounting base, and a high-pressure mounting base. The lower end of the one-way valve body has a low-pressure connecting groove, and the outer peripheral wall of the one-way valve body has several low-pressure water inlet holes. The upper end of the one-way valve body has a high-pressure connecting groove, and the inner side of the one-way valve body has a high-pressure water outlet hole. The upper end of the low-pressure mounting base has a low-pressure guide groove, in which a low-pressure sealing seat is disposed. The lower end of the low-pressure sealing seat has a low-pressure guide bracket, and the outer peripheral wall of the low-pressure guide bracket abuts against the inner wall of the low-pressure guide groove. The lower end of the high-pressure mounting base has a high-pressure guide groove, in which a high-pressure sealing seat is disposed. The upper end of the high-pressure sealing seat has a high-pressure guide bracket, and the outer peripheral wall of the high-pressure guide bracket abuts against the inner wall of the high-pressure guide groove. The above-mentioned one-way valve has the advantage of high stability.

Description

Technical Field

[0001] This utility model relates to a check valve, and more particularly, to a check valve for an ultra-high pressure plunger pump. Background Technology

[0002] Currently, Chinese patent CN208294752U discloses a one-way valve assembly for a plunger pump, including an upper valve body integrally connected to the plunger pump. The upper valve body has an upper cavity and a lower cavity, which are connected by a through hole. A connecting through hole for the plunger pump is provided on one side of the upper valve body located in the lower cavity. A valve core is provided in both the upper and lower cavities, and a stainless steel ball is positioned within the valve core. However, in the use of this one-way valve assembly, the movement of the stainless steel ball in the valve core is controlled solely by pressure changes in the through hole, resulting in low stability. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a one-way valve for an ultra-high pressure plunger pump, which has the advantage of high stability.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a one-way valve for an ultra-high pressure plunger pump, including a one-way valve body, a low-pressure mounting seat detachably disposed at the lower end of the one-way valve body, and a high-pressure mounting seat detachably disposed at the upper end of the one-way valve body;

[0005] A low-pressure connection groove is provided at the center of the lower end of the one-way valve body. A plurality of low-pressure water inlets are provided circumferentially on the outer peripheral wall of the one-way valve body. All of the low-pressure water inlets are connected to the low-pressure connection groove. A high-pressure connection groove is provided at the center of the upper end of the one-way valve body. A high-pressure water outlet is provided on the inner side of the one-way valve body. The upper end of the high-pressure water outlet is connected to the high-pressure connection groove. The lower end of the high-pressure water outlet penetrates the lower end face of the one-way valve body.

[0006] The lower end of the low-pressure mounting base has a plunger groove for the plunger of the plunger pump to slide into. The upper end of the low-pressure mounting base has a low-pressure guide groove, the inner diameter of which is larger than the inner diameter of the plunger groove. The low-pressure guide groove is connected to the lower end of the high-pressure outlet. A low-pressure sealing seat is provided in the low-pressure guide groove, and a low-pressure sealing protrusion is provided at the upper end of the low-pressure sealing seat. The low-pressure sealing protrusion extends into the low-pressure connecting groove, thereby sealing the opening of the low-pressure connecting groove. A low-pressure guide bracket is provided at the lower end of the low-pressure guide bracket, the outer peripheral wall of the low-pressure guide bracket abuts against the inner groove wall of the low-pressure guide groove, the low-pressure sealing seat is slidably connected to the low-pressure mounting seat through the low-pressure guide bracket, a low-pressure sealing spring is provided in the low-pressure guide groove, the upper end of the low-pressure sealing spring abuts against the low-pressure guide bracket, the lower end of the low-pressure sealing spring abuts against the inner groove wall at the lower end of the low-pressure guide groove, and the low-pressure sealing spring drives the low-pressure sealing protrusion to extend into the low-pressure connecting groove through its elastic force.

[0007] The lower end of the high-pressure mounting base is provided with a high-pressure guide groove, in which a high-pressure sealing seat is provided. The lower end of the high-pressure sealing seat is provided with a high-pressure sealing protrusion, which extends into the high-pressure connecting groove to seal the opening of the high-pressure connecting groove. The upper end of the high-pressure sealing seat is provided with a high-pressure guide bracket, the outer peripheral wall of which abuts against the inner groove wall of the high-pressure guide groove. The high-pressure sealing seat is slidably connected to the high-pressure mounting base through the high-pressure guide bracket. A high-pressure sealing spring is provided in the high-pressure guide groove, the upper end of which abuts against the inner groove wall of the high-pressure guide groove, and the lower end of which abuts against the high-pressure guide bracket. The high-pressure sealing spring drives the high-pressure sealing protrusion into the high-pressure connecting groove through its elastic force. The lower outer peripheral wall of the high-pressure mounting base is provided with several water passage holes, all of which are connected to the high-pressure guide groove.

[0008] With the above technical solution, when the plunger of the plunger pump moves downward in the plunger groove, the internal space of the low-pressure mounting seat increases and a negative pressure is formed. At this time, the low-pressure sealing seat moves downward in the low-pressure guide groove under the action of negative pressure, and the low-pressure sealing protrusion separates from the low-pressure connecting groove. Water enters the internal space of the low-pressure mounting seat through the low-pressure water inlet and the low-pressure connecting groove. At the same time, the high-pressure sealing seat will move downward in the high-pressure guide groove under the action of negative pressure and high-pressure sealing spring. The high-pressure sealing protrusion extends into the high-pressure connecting groove and seals the groove opening of the high-pressure connecting groove.

[0009] As the plunger of the plunger pump moves upward in the plunger groove, the internal space of the low-pressure mounting seat gradually decreases and forms high pressure. At this time, the high-pressure sealing seat moves upward in the low-pressure guide groove under the action of high pressure. The low-pressure sealing protrusion extends into the low-pressure connecting groove and seals the opening of the low-pressure connecting groove. At the same time, the high-pressure sealing seat will move upward in the high-pressure guide groove under the action of high pressure. The high-pressure sealing protrusion will detach from the high-pressure connecting groove. Water in the internal space of the low-pressure mounting seat enters the internal space of the high-pressure mounting seat through the high-pressure water outlet and the high-pressure connecting groove, and is finally discharged through several water inlets.

[0010] The sliding of the low-pressure sealing seat is limited and guided by the low-pressure guide bracket, making it less prone to displacement during sliding. Similarly, the sliding of the high-pressure sealing seat is limited and guided by the high-pressure guide bracket, also preventing displacement during sliding. In summary, the aforementioned check valve offers the advantage of high stability.

[0011] Preferably, a low-pressure connecting ring is provided at the lower end of the one-way valve body, the inner side of the low-pressure connecting ring is provided with an internal thread, the outer side of the low-pressure mounting seat is provided with an external thread, and the low-pressure mounting seat is threadedly connected to the inner side of the low-pressure connecting ring.

[0012] With the above technical solution, the low-pressure mounting base is threaded to the inner side of the low-pressure connecting ring, which has the advantages of high connection stability and convenient disassembly and assembly.

[0013] Preferably, a high-pressure connecting ring is provided at the upper end of the one-way valve body, the outer side of the high-pressure connecting ring is provided with an external thread, the inner side of the high-pressure mounting seat is provided with an internal thread, and the high-pressure mounting seat is threadedly connected to the outer side of the high-pressure connecting ring.

[0014] With the above technical solution, the high-voltage mounting base is threaded to the inner side of the high-voltage connecting ring, which has the advantages of high connection stability and convenient disassembly and assembly.

[0015] Preferably, the low-pressure guide bracket includes a low-pressure extension column disposed at the lower end of the low-pressure sealing seat and a plurality of low-pressure guide units uniformly disposed circumferentially on the outer peripheral wall of the low-pressure extension column. The low-pressure guide unit includes a low-pressure support rod disposed on the outer peripheral wall of the low-pressure extension column and a low-pressure arc plate disposed at the end of the low-pressure support rod. The outer wall of the low-pressure arc plate is in contact with the inner wall of the low-pressure guide groove.

[0016] Through the above technical solution, the low-pressure guide bracket, composed of low-pressure extension column, low-pressure support rod and low-pressure arc plate, has the advantages of occupying less space and low production cost.

[0017] Preferably, a lower threaded hole is provided at the center of the lower end of the low-pressure sealing seat, and the upper end of the low-pressure extension column is provided with an external thread and threadedly connected to the lower threaded hole.

[0018] With the above technical solution, the upper end of the low-pressure extension column is threaded into the lower threaded hole, which has the advantages of high connection stability and convenient disassembly and assembly.

[0019] Preferably, a low-pressure connecting sleeve is provided on the inner wall of the low-pressure arc plate, the low-pressure connecting sleeve is sleeved on the end of the low-pressure support rod, and a low-pressure abutting bolt is threadedly connected to the low-pressure connecting sleeve, the threaded section of the low-pressure abutting bolt abutting against the outer wall of the low-pressure support rod.

[0020] Through the above technical solution, the low-pressure arc plate is connected to the low-pressure support rod through the low-pressure connecting sleeve and the low-pressure abutment bolt, which has the advantages of high connection stability and convenient disassembly and assembly.

[0021] Preferably, the high-pressure guide bracket includes a high-pressure extension column disposed at the upper end of the high-pressure sealing seat and a plurality of high-pressure guide units uniformly disposed circumferentially on the outer peripheral wall of the high-pressure extension column. The high-pressure guide unit includes a high-pressure support rod disposed on the outer peripheral wall of the high-pressure extension column and a high-pressure arc plate disposed at the end of the high-pressure support rod. The outer wall of the high-pressure arc plate is in contact with the inner wall of the high-pressure guide groove.

[0022] Through the above technical solution, the high-pressure guide bracket, composed of high-pressure extension column, high-pressure support rod and high-pressure arc plate, has the advantages of small space occupation and low production cost.

[0023] Preferably, the high-pressure sealing seat has an upper threaded hole at its upper center, and the lower end of the high-pressure extension column has an external thread and is threaded into the upper threaded hole.

[0024] With the above technical solution, the lower end of the high-pressure extension column is threaded into the upper threaded hole, which has the advantages of high connection stability and convenient disassembly and assembly.

[0025] Preferably, a high-pressure connecting sleeve is provided on the inner wall of the high-pressure arc plate, the high-pressure connecting sleeve is sleeved on the end of the high-pressure support rod, and a high-pressure abutting bolt is threadedly connected to the high-pressure connecting sleeve, the threaded section of the high-pressure abutting bolt abutting against the outer wall of the high-pressure support rod.

[0026] Through the above technical solution, the high-pressure arc plate is connected to the high-pressure support rod through the high-pressure connecting sleeve and the high-pressure abutment bolt, which has the advantages of high connection stability and convenient disassembly and assembly. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of an embodiment;

[0028] Figure 2 for Figure 1 Enlarged view of part A;

[0029] Figure 3 for Figure 1 Enlarged view of part B.

[0030] Reference numerals: 1. One-way valve body; 2. Low-pressure mounting base; 3. High-pressure mounting base; 4. Low-pressure connection groove; 5. Low-pressure inlet; 6. High-pressure connection groove; 7. High-pressure outlet; 8. Plunger groove; 9. Low-pressure guide groove; 10. Low-pressure sealing seat; 11. Low-pressure sealing protrusion; 12. Low-pressure guide bracket; 121. Low-pressure extension column; 122. Low-pressure guide unit; 1221. Low-pressure support rod; 1222. Low-pressure arc plate; 13. Low-pressure sealing spring; 14. High-pressure guide... 15. High-pressure sealing seat; 16. High-pressure sealing protrusion; 17. High-pressure guide bracket; 171. High-pressure extension column; 172. High-pressure guide unit; 1721. High-pressure support rod; 1722. High-pressure arc plate; 18. High-pressure sealing spring; 19. Water passage hole; 20. Low-pressure connecting ring; 21. High-pressure connecting ring; 22. Lower threaded hole; 23. Low-pressure connecting sleeve; 24. Low-pressure abutment bolt; 25. Upper threaded hole; 26. High-pressure connecting sleeve; 27. High-pressure abutment bolt. Detailed Implementation

[0031] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so that the technical solution of this utility model can be more easily understood and mastered.

[0032] A check valve for an ultra-high pressure plunger pump, such as Figures 1 to 3 As shown, it includes a one-way valve body 1, a low-pressure mounting base 2 detachably disposed at the lower end of the one-way valve body 1, and a high-pressure mounting base 3 detachably disposed at the upper end of the one-way valve body 1.

[0033] A low-pressure connection groove 4 is provided at the center of the lower end of the one-way valve body 1. Several low-pressure water inlets 5 are provided circumferentially on the outer peripheral wall of the one-way valve body 1, and all of the low-pressure water inlets 5 are connected to the low-pressure connection groove 4. A high-pressure connection groove 6 is provided at the center of the upper end of the one-way valve body 1. A high-pressure water outlet 7 is provided on the inner side of the one-way valve body 1. The upper end of the high-pressure water outlet 7 is connected to the high-pressure connection groove 6, and the lower end of the high-pressure water outlet 7 penetrates the lower end face of the one-way valve body 1.

[0034] The lower end of the low-pressure mounting base 2 has a plunger groove 8 for the plunger of the plunger pump to slide into. The upper end of the low-pressure mounting base 2 has a low-pressure guide groove 9, the inner diameter of which is larger than that of the plunger groove 8. The low-pressure guide groove 9 is connected to the lower end of the high-pressure outlet hole 7. A low-pressure sealing seat 10 is provided in the low-pressure guide groove 9. A low-pressure sealing protrusion 11 is provided at the upper end of the low-pressure sealing seat 10. The low-pressure sealing protrusion 11 is used to extend into the low-pressure connecting groove 4, thereby sealing the opening of the low-pressure connecting groove 4. The lower end of the low-pressure sealing seat 10 has a low-pressure guide bracket 12. The outer peripheral wall of the low-pressure guide bracket 12 abuts against the inner groove wall of the low-pressure guide groove 9. The low-pressure sealing seat 10 is slidably connected to the low-pressure mounting base 2 through the low-pressure guide bracket 12. A low-pressure sealing spring 13 is provided in the low-pressure guide groove 9. The upper end of the low-pressure sealing spring 13 abuts against the low-pressure guide bracket 12, and the lower end of the low-pressure sealing spring 13 abuts against the inner wall of the lower end of the low-pressure guide groove 9. The low-pressure sealing spring 13 drives the low-pressure sealing protrusion 11 to extend into the low-pressure connecting groove 4 through the elastic force.

[0035] The lower end of the high-pressure mounting base 3 is provided with a high-pressure guide groove 14, in which a high-pressure sealing seat 15 is provided. The lower end of the high-pressure sealing seat 15 is provided with a high-pressure sealing protrusion 16, which extends into the high-pressure connecting groove 6 to seal the opening of the high-pressure connecting groove 6. The upper end of the high-pressure sealing seat 15 is provided with a high-pressure guide bracket 17, the outer peripheral wall of which abuts against the inner wall of the high-pressure guide groove 14. The high-pressure sealing seat 15 is slidably connected to the high-pressure mounting base 3 via the high-pressure guide bracket 17. A high-pressure sealing spring 18 is provided in the high-pressure guide groove 14, the upper end of which abuts against the inner wall of the high-pressure guide groove 14, and the lower end of which abuts against the high-pressure guide bracket 17. The high-pressure sealing spring 18, through its elastic force, drives the high-pressure sealing protrusion 16 to extend into the high-pressure connecting groove 6. Several water passage holes 19 are provided on the lower outer peripheral wall of the high-pressure mounting base 3, and all of the water passage holes 19 are connected to the high-pressure guide groove 14.

[0036] A low-pressure connecting ring 20 is provided at the lower end of the one-way valve body 1. The inner side of the low-pressure connecting ring 20 is provided with an internal thread, and the outer side of the low-pressure mounting seat 2 is provided with an external thread. The low-pressure mounting seat 2 is threadedly connected to the inner side of the low-pressure connecting ring 20. A high-pressure connecting ring 21 is provided at the upper end of the one-way valve body 1. The outer side of the high-pressure connecting ring 21 is provided with an external thread, and the inner side of the high-pressure mounting seat 3 is provided with an internal thread. The high-pressure mounting seat 3 is threadedly connected to the outer side of the high-pressure connecting ring 21.

[0037] The low-pressure guide bracket 12 includes a low-pressure extension column 121 disposed at the lower end of the low-pressure sealing seat 10, and a plurality of low-pressure guide units 122 evenly disposed circumferentially on the outer peripheral wall of the low-pressure extension column 121. Each low-pressure guide unit 122 includes a low-pressure support rod 1221 disposed on the outer peripheral wall of the low-pressure extension column 121, and a low-pressure arc-shaped plate 1222 disposed at the end of the low-pressure support rod 1221. The outer wall of the low-pressure arc-shaped plate 1222 is in contact with the inner wall of the low-pressure guide groove 9. A threaded hole 22 is provided at the center of the lower end of the low-pressure sealing seat 10, and the upper end of the low-pressure extension column 121 is provided with an external thread and threadedly connected to the threaded hole 22. A low-pressure connecting sleeve 23 is provided on the inner wall of the low-pressure arc plate 1222. The low-pressure connecting sleeve 23 is sleeved on the end of the low-pressure support rod 1221. A low-pressure abutting bolt 24 is threadedly connected to the low-pressure connecting sleeve 23. The threaded section of the low-pressure abutting bolt 24 abuts against the outer wall of the low-pressure support rod 1221.

[0038] The high-pressure guide bracket 17 includes a high-pressure extension column 171 disposed on the upper end of the high-pressure sealing seat 15, and a plurality of high-pressure guide units 172 evenly disposed circumferentially on the outer peripheral wall of the high-pressure extension column 171. Each high-pressure guide unit 172 includes a high-pressure support rod 1721 disposed on the outer peripheral wall of the high-pressure extension column 171, and a high-pressure arc-shaped plate 1722 disposed at the end of the high-pressure support rod 1721. The outer wall of the high-pressure arc-shaped plate 1722 is in contact with the inner wall of the high-pressure guide groove 14. A threaded hole 25 is provided at the center of the upper end of the high-pressure sealing seat 15, and the lower end of the high-pressure extension column 171 is provided with an external thread and threadedly connected to the threaded hole 25. A high-pressure connecting sleeve 26 is disposed on the inner wall of the high-pressure arc-shaped plate 1722, and the high-pressure connecting sleeve 26 is sleeved on the end of the high-pressure support rod 1721. A high-pressure abutment bolt 27 is threadedly connected to the high-pressure connecting sleeve 26, and the threaded section of the high-pressure abutment bolt 27 abuts against the outer wall of the high-pressure support rod 1721.

[0039] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. A check valve for an ultra-high pressure plunger pump characterized by: It includes a one-way valve body (1), a low-pressure mounting base (2) detachably disposed at the lower end of the one-way valve body (1), and a high-pressure mounting base (3) detachably disposed at the upper end of the one-way valve body (1); A low-pressure connection groove (4) is provided at the center of the lower end of the one-way valve body (1). A plurality of low-pressure water inlets (5) are provided along the circumferential direction on the outer peripheral wall of the one-way valve body (1). The plurality of low-pressure water inlets (5) are all connected to the low-pressure connection groove (4). A high-pressure connection groove (6) is provided at the center of the upper end of the one-way valve body (1). A high-pressure water outlet (7) is provided on the inner side of the one-way valve body (1). The upper end of the high-pressure water outlet (7) is connected to the high-pressure connection groove (6). The lower end of the high-pressure water outlet (7) penetrates the lower end face of the one-way valve body (1). The lower end of the low-pressure mounting base (2) is provided with a plunger groove (8) for the plunger of the plunger pump to slide into. The upper end of the low-pressure mounting base (2) is provided with a low-pressure guide groove (9). The inner diameter of the low-pressure guide groove (9) is larger than the inner diameter of the plunger groove (8). The low-pressure guide groove (9) is connected to the lower end of the high-pressure water outlet (7). A low-pressure sealing seat (10) is provided in the low-pressure guide groove (9). A low-pressure sealing protrusion (11) is provided at the upper end of the low-pressure sealing seat (10). The low-pressure sealing protrusion (11) is used to extend into the low-pressure connecting groove (4) and thus seal the opening of the low-pressure connecting groove (4). The low-pressure sealing seat (10) has... A low-pressure guide bracket (12) is provided at the lower end. The outer peripheral wall of the low-pressure guide bracket (12) abuts against the inner groove wall of the low-pressure guide groove (9). The low-pressure sealing seat (10) is slidably connected to the low-pressure mounting seat (2) through the low-pressure guide bracket (12). A low-pressure sealing spring (13) is provided in the low-pressure guide groove (9). The upper end of the low-pressure sealing spring (13) abuts against the low-pressure guide bracket (12), and the lower end of the low-pressure sealing spring (13) abuts against the lower inner groove wall of the low-pressure guide groove (9). The low-pressure sealing spring (13) drives the low-pressure sealing protrusion (11) to extend into the low-pressure connecting groove (4) by elastic force. The lower end of the high-pressure mounting base (3) is provided with a high-pressure guide groove (14), and a high-pressure sealing seat (15) is provided in the high-pressure guide groove (14). The lower end of the high-pressure sealing seat (15) is provided with a high-pressure sealing protrusion (16), which is used to extend into the high-pressure connecting groove (6) and thus seal the opening of the high-pressure connecting groove (6). The upper end of the high-pressure sealing seat (15) is provided with a high-pressure guide bracket (17), and the outer peripheral wall of the high-pressure guide bracket (17) abuts against the inner groove wall of the high-pressure guide groove (14). The high-pressure sealing seat (15) is connected to the high-pressure guide bracket (17) through the high-pressure guide bracket (17). 17) Slidingly connected to the high-pressure mounting base (3), a high-pressure sealing spring (18) is provided in the high-pressure guide groove (14), the upper end of the high-pressure sealing spring (18) abuts against the inner groove wall of the high-pressure guide groove (14), the lower end of the high-pressure sealing spring (18) abuts against the high-pressure guide bracket (17), the high-pressure sealing spring (18) drives the high-pressure sealing protrusion (16) to extend into the high-pressure connecting groove (6) by elastic force, and a plurality of water passage holes (19) are provided on the lower outer peripheral wall of the high-pressure mounting base (3), and the plurality of water passage holes (19) are all connected to the high-pressure guide groove (14).

2. A one-way valve for an ultra-high pressure piston pump according to claim 1, characterized in that: The lower end of the one-way valve body (1) is provided with a low-pressure connecting ring (20), the inner side of the low-pressure connecting ring (20) is provided with an internal thread, the outer side of the low-pressure mounting seat (2) is provided with an external thread, and the low-pressure mounting seat (2) is threadedly connected to the inner side of the low-pressure connecting ring (20).

3. A one-way valve for an ultra-high pressure piston pump according to claim 1, characterized in that: The upper end of the one-way valve body (1) is provided with a high-pressure connecting ring (21), the outer side of the high-pressure connecting ring (21) is provided with an external thread, the inner side of the high-pressure mounting seat (3) is provided with an internal thread, and the high-pressure mounting seat (3) is threaded to the outer side of the high-pressure connecting ring (21).

4. A one-way valve for an ultra-high pressure piston pump according to claim 1, characterized in that: The low-pressure guide bracket (12) includes a low-pressure extension column (121) disposed at the lower end of the low-pressure sealing seat (10) and a plurality of low-pressure guide units (122) uniformly disposed circumferentially on the outer peripheral wall of the low-pressure extension column (121). The low-pressure guide unit (122) includes a low-pressure support rod (1221) disposed on the outer peripheral wall of the low-pressure extension column (121) and a low-pressure arc plate (1222) disposed at the end of the low-pressure support rod (1221). The outer wall of the low-pressure arc plate (1222) is in contact with the inner wall of the low-pressure guide groove (9).

5. A one-way valve for an ultra-high pressure piston pump according to claim 4, characterized in that: The low-pressure sealing seat (10) has a lower threaded hole (22) at its lower center, and the upper end of the low-pressure extension column (121) is provided with an external thread and is threaded into the lower threaded hole (22).

6. A one-way valve for an ultra-high pressure piston pump according to claim 4, characterized in that: A low-pressure connecting sleeve (23) is provided on the inner wall of the low-pressure arc plate (1222). The low-pressure connecting sleeve (23) is sleeved on the end of the low-pressure support rod (1221). A low-pressure abutting bolt (24) is threadedly connected to the low-pressure connecting sleeve (23). The threaded section of the low-pressure abutting bolt (24) abuts against the outer wall of the low-pressure support rod (1221).

7. A one-way valve for an ultra-high pressure piston pump according to claim 1, characterized in that: The high-pressure guide bracket (17) includes a high-pressure extension column (171) disposed at the upper end of the high-pressure sealing seat (15) and a plurality of high-pressure guide units (172) uniformly disposed circumferentially on the outer peripheral wall of the high-pressure extension column (171). The high-pressure guide unit (172) includes a high-pressure support rod (1721) disposed on the outer peripheral wall of the high-pressure extension column (171) and a high-pressure arc plate (1722) disposed at the end of the high-pressure support rod (1721). The outer wall of the high-pressure arc plate (1722) is in contact with the inner wall of the high-pressure guide groove (14).

8. A one-way valve for an ultra-high pressure piston pump according to claim 7, characterized in that: The high-pressure sealing seat (15) has an upper threaded hole (25) at its upper center, and the lower end of the high-pressure extension column (171) is provided with an external thread and is threaded into the upper threaded hole (25).

9. A one-way valve for an ultra-high pressure piston pump according to claim 7, characterized in that: A high-pressure connecting sleeve (26) is provided on the inner wall of the high-pressure arc plate (1722). The high-pressure connecting sleeve (26) is sleeved on the end of the high-pressure support rod (1721). A high-pressure abutting bolt (27) is threadedly connected to the high-pressure connecting sleeve (26). The threaded section of the high-pressure abutting bolt (27) abuts against the outer wall of the high-pressure support rod (1721).

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