Valve box, hydraulic end and pump

Abstract

This application discloses a valve box, a hydraulic end, and a pump, relating to the technical fields of oil and gas, mining, etc. A valve box includes: a valve box body and a packing box; the valve box body has a first channel extending through the valve box body along its axial direction; the packing box has a second channel; one end of the packing box is detachably disposed in the first channel, the second channel communicates with the first channel, and at least a portion of the second channel and the first channel together form a main channel, the main channel being used to accommodate the valve seat and valve assembly of the hydraulic end. This application can solve the problems of inconvenient maintenance or replacement and high cost of integral valve boxes.

Description

Technical Field

[0001] This application belongs to the technical fields of oil and gas, mining, etc., and specifically relates to a valve box, hydraulic end and pump. Background Technology

[0002] In related technologies, the valve box of a hydraulic valve is often an integrated structure, meaning the valve box and packing box are integrated into one unit. During operation, the inner wall of the valve box is constantly subjected to the impact of the fluid, and the packing box is subjected to friction from the plunger. Over time, this can easily lead to erosion of the inner wall of the valve box and wear of the packing box. In such cases, the entire valve box needs to be repaired or replaced, which is inconvenient and increases the cost of maintenance or replacement. Utility Model Content

[0003] The purpose of this application is to provide a valve box, hydraulic end, and pump that can solve the problems of inconvenient maintenance or replacement and high cost of integral valve boxes.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows: This application provides a valve box, including: a valve box body and a packing box; The valve box body is provided with a first channel 111 that runs through the valve box body along the axial direction of the valve box; The packing box is provided with a second channel; One end of the packing box is detachably disposed in the first channel 111. The second channel is connected to the first channel 111, and at least a portion of the second channel and the first channel 111 together form a main channel. The main channel is used to accommodate the valve seat and valve assembly of the hydraulic end.

[0005] This application embodiment also provides a hydraulic end, including: a plunger, a valve seat, a valve assembly, and the above-mentioned valve box; The plunger is movably disposed in the second channel and can be moved into or out of the main channel; Both the valve seat and the valve assembly are located within the main channel.

[0006] This application also provides a pump, including the hydraulic end described above.

[0007] In this embodiment, at least a portion of the second channel of the packing box and the first channel 111 of the valve box body can together form the main channel of the valve box, so as to accommodate the valve seat and valve assembly of the hydraulic end through the main channel. Furthermore, the packing box is detachable from the valve box body. Thus, when the valve box wears due to long-term operation of the hydraulic end, the packing box can be removed from the valve box body, which facilitates the internal maintenance of the valve box body. Moreover, the internal maintenance or replacement of the packing box can be performed separately without the need to repair or replace the entire valve box, which not only makes maintenance or replacement more convenient but also reduces maintenance or replacement costs. Attached Figure Description

[0008] Figure 1 This is a cross-sectional schematic diagram of the valve box disclosed in the embodiments of this application; Figure 2 This is a schematic diagram of the valve box structure disclosed in the embodiments of this application.

[0009] Explanation of reference numerals in the attached figures: 10 - Valve box; M - Main passage; 11-Valve box body; 111-First channel; 12-Packing box; 121-Second channel; 1211-First channel segment; 1212-Second channel segment; 122-Limiting protrusion; 131 - First sealing ring; 132 - Second sealing ring; 133 - Third sealing ring; 14-Sealing sleeve; 20 - Piston; 30 - Valve seat; 40 - Valve assembly; 50 - Packing assembly. Detailed Implementation

[0010] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0011] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0012] The embodiments of this application will be described in detail below with reference to the accompanying drawings and specific examples and application scenarios.

[0013] refer to Figure 1 and Figure 2 This application discloses a valve box 10, which is applied to the hydraulic end of a pump, such as the hydraulic end of a plunger pump. The disclosed valve box 10 includes a valve box body 11 and a packing box 12.

[0014] The valve box body 11 is a basic component that provides a support and installation foundation for components such as the packing box 12. The valve box body 11 has a first channel 111 that extends through the valve box body 11 along the axial direction of the valve box 10. One end of the first channel 111 can be sealed with a sealing element, and the other end can be used to insert a plunger 20.

[0015] The packing box 12 may be provided with a second channel 121, which can be used to pass through the plunger 20 and enable the plunger 20 to reciprocate within the second channel 121.

[0016] Optionally, a packing assembly 50 may also be provided inside the packing box 12. The packing assembly 50 is located between the outer wall of the plunger 20 and the inner wall of the second channel 121 to provide sealing and wear resistance.

[0017] One end of the packing box 12 is detachably disposed in the first channel 111 to facilitate the assembly and disassembly of the packing box 12; and the second channel 121 is connected to the first channel 111 so that the plunger 20 can be inserted into the first channel 111 through the second channel 121, thereby pressurizing the liquid located in the first channel 111.

[0018] Considering that the hydraulic end may also include components such as valve seat 30 and valve assembly 40 disposed in valve box 10, in this embodiment of the application, at least a portion of the second channel 121 and the first channel 111 can together form a main channel M, which can be used to accommodate the valve seat 30 and valve assembly 40 of the hydraulic end.

[0019] Optionally, the valve assembly 40 may include a liquid inlet valve, which may be disposed in the second channel 121 in a region close to the first channel 111; a portion of the valve seat 30 may be located in the first channel 111, and another portion of the valve seat 30 may be disposed in the second channel 121.

[0020] Based on the above configuration, in this embodiment of the application, at least a portion of the second channel 121 of the packing box 12 and the first channel 111 of the valve body 11 can jointly form the main channel M of the valve body 10, so as to accommodate the valve seat 30 and the valve assembly 40 of the hydraulic end through the main channel M. Furthermore, the packing box 12 is detachable from the valve body 11. Thus, when the valve body 10 is worn due to long-term operation of the hydraulic end, the packing box 12 can be removed from the valve body 11, thereby facilitating the internal maintenance of the valve body 11. Moreover, the internal maintenance or replacement of the packing box 12 can be performed separately without the need to repair or replace the entire valve body 10, which not only makes maintenance or replacement more convenient but also reduces maintenance or replacement costs.

[0021] refer to Figure 1 In some embodiments, the second channel 121 may include a first channel segment 1211 and a second channel segment 1212 that are connected to each other, wherein the first channel segment 1211 is used to accommodate the plunger 20 of the hydraulic end, and the second channel segment 1212 is connected to the first channel 111 to form a main channel M.

[0022] Optionally, the inlet valve in the valve assembly 40 and another part of the valve seat 30 can be located in the second channel section 1212. Furthermore, the inner wall of the second channel section 1212 can also limit the inlet valve and the other part of the valve seat 30 to ensure the installation stability of the inlet valve and the valve seat 30.

[0023] It should be noted that when the plunger 20 moves inward within the first channel section 1211, the front end of the plunger 20 can move from the first channel section 1211 to the second channel section 1212, and pressurize the liquid flowing into the second channel section 1212 via the inlet valve, thereby obtaining high-pressure liquid.

[0024] Furthermore, the high-pressure liquid can squeeze and impact the inner wall of the second channel section 1212, which will cause wear to the inner wall of the second channel section 1212 over time. Based on this, the packing box 12 can be removed from the valve body 11 to facilitate the repair of the inner wall of the second channel section 1212. Of course, when the wear is more severe, the packing box 12 can also be replaced separately. This not only facilitates maintenance and replacement but also reduces costs.

[0025] In some embodiments, along the extending direction of the second channel 121, the cross-sectional area of ​​the second channel segment 1212 at one end near the first channel segment 1211 is smaller than the cross-sectional area of ​​the second channel segment 1212 at one end away from the first channel segment 1211. This allows the second channel segment 1212 to form a larger space in the region facing the first channel 111, so as to accommodate the valve seat 30 and the valve assembly 40.

[0026] Optionally, the cross-sectional area of ​​the second channel segment 1212 can gradually increase from one end near the first channel segment 1211 to the end away from the first channel segment 1211; alternatively, the cross-sectional area of ​​the second channel segment 1212 can first increase and then remain constant from one end near the first channel segment 1211 to the end away from the first channel segment 1211. Other methods are also possible; regardless of the method, sufficient space can be provided to accommodate the valve seat 30 and the valve assembly 40.

[0027] To achieve a detachable connection between the packing box 12 and the valve box body 11, the inner wall of the first channel section 1211 can be provided with internal threads, and correspondingly, the outer wall of one end of the packing box 12 can be provided with external threads. Thus, the packing box 12 and the valve box body 11 can be connected via the mating of internal and external threads. This design ensures the reliability and stability of the connection, facilitates disassembly and assembly for maintenance or replacement of the packing box 12 or the valve box body 11, and also improves the sealing performance between the packing box 12 and the valve box 10 to some extent.

[0028] In other embodiments, the packing box 12 can also be installed to the side of the valve box body 11 using fasteners such as bolts, and one end of the packing box 12 extends into the first channel 111 to ensure the installation stability of the packing box 12, and can also help improve the sealing between the packing box 12 and the valve box body 11.

[0029] Continue to refer to Figure 1 In some embodiments, the outer wall of the packing box 12 may be provided with a circumferentially arranged limiting protrusion 122, which abuts against the end face of the valve box body 11. Based on this arrangement, when one end of the packing box 12 is located in the first channel 111, the limiting protrusion 122 can abut against the end face of the valve box body 11. On the one hand, this can limit the packing box 12 to ensure that it is installed in place without over-installation. On the other hand, it can also help improve the sealing between the packing box 12 and the valve box 10.

[0030] Furthermore, a sealing gasket can be provided between the limiting protrusion 122 and the end face of the valve box body 11. The sealing gasket provides a further sealing effect on the packing and the valve box body 11 in the axial direction to prevent liquid leakage.

[0031] In some embodiments, the outer wall of one end of the packing box 12 and the inner wall of the first channel 111 can be sealed together by a first sealing ring 131. In this way, the first sealing ring 131 can further seal the packing box 12 and the valve box body 11 in the radial direction to prevent liquid leakage.

[0032] Optionally, at least one of the outer wall of one end of the packing box 12 and the inner wall of the first channel 111 may be provided with a first annular groove, and a first sealing ring 131 may be embedded in the first annular groove, with a portion of the first sealing ring 131 protruding out of the first annular groove. Specifically, when the first annular groove is formed on the outer wall of one end of the packing box 12, a portion of the first sealing ring 131 may protrude out of the first annular groove and abut against the inner wall of the first channel 111 to achieve a seal; when the first annular groove is formed on the inner wall of the first channel 111, a portion of the first sealing ring 131 may protrude out of the first annular groove and abut against the outer wall of one end of the packing box 12 to achieve a seal; of course, the first annular groove may also be formed on both the outer wall of one end of the packing box 12 and the inner wall of the first channel 111, thus achieving a sealing effect.

[0033] In some embodiments, the valve box 10 may further include a sealing sleeve 14, which is used to seal the connection between the inner wall of the second channel 121 and the valve seat 30. In this way, the sealing sleeve 14 can provide a good seal between the valve seat 30 and the second channel 121 in the radial direction to prevent liquid leakage.

[0034] Furthermore, the inner circumferential surface of the sealing sleeve 14 is used to seal and connect with the outer circumferential surface of the valve seat 30 through the second sealing ring 132, so that the second sealing ring 132 can play a further sealing role between the sealing sleeve 14 and the valve seat 30; the outer circumferential surface of the sealing sleeve 14 is used to seal and connect with the inner wall of the second channel 121 through the third sealing ring 133, so that the third sealing ring 133 can play a further sealing role between the sealing sleeve 14 and the second channel 121.

[0035] Optionally, at least one of the inner circumferential surface of the sealing sleeve 14 and the outer circumferential surface of the valve seat 30 may be provided with a second annular groove for installing a second sealing ring 132; in addition, a third annular groove may be provided between the outer circumferential surface of the sealing sleeve 14 and the inner wall of the second channel 121 for installing a third sealing ring 133.

[0036] Based on the valve box 10 described above, this application also discloses a hydraulic end, which includes: a plunger 20, a valve seat 30, a valve assembly 40, and the valve box 10 described above. The plunger 20 is movably disposed in the second channel 121 and can move into or out of the main channel M. Besides this, the hydraulic end may also include other structures, which are not specifically limited here.

[0037] Based on the above-mentioned hydraulic end, this application also discloses a pump, wherein the pump can be a plunger pump.

[0038] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A valve box, characterized in that, include: Valve box body (11) and packing box (12); The valve box body (11) is provided with a first channel (111) that runs through the valve box body (11) along the axial direction of the valve box (10). The packing box (12) is provided with a second channel (121); One end of the packing box (12) is detachably disposed in the first channel (111), the second channel (121) is connected to the first channel (111), and at least a portion of the second channel (121) and the first channel (111) together form a main channel (M), the main channel (M) being used to accommodate the valve seat (30) and valve assembly (40) of the hydraulic end.

2. The valve box according to claim 1, characterized in that, The second channel (121) includes a first channel segment (1211) and a second channel segment (1212) that are connected. The first channel segment (1211) is used to accommodate the plunger (20) of the hydraulic end, and the second channel segment (1212) is connected to the first channel (111) to form the main channel (M).

3. The valve box according to claim 2, characterized in that, Along the extension direction of the second channel (121), the cross-sectional area of ​​the second channel segment (1212) at the end near the first channel segment (1211) is smaller than the cross-sectional area of ​​the second channel segment (1212) at the end away from the first channel segment (1211).

4. The valve box according to claim 2, characterized in that, The inner wall of the first channel section (1211) is provided with an internal thread, and the outer wall of one end of the packing box (12) is provided with an external thread. The packing box (12) and the valve box body (11) are connected by the internal thread and the external thread.

5. The valve box according to claim 1 or 4, characterized in that, The outer wall of the packing box (12) is provided with a limiting protrusion (122) arranged in the circumferential direction, and the limiting protrusion (122) abuts against the end face of the valve box body (11).

6. The valve box according to claim 1, characterized in that, The outer wall of one end of the packing box (12) is sealed to the inner wall of the first channel (111) by a first sealing ring (131).

7. The valve box according to claim 1 or 6, characterized in that, The valve box (10) also includes a sealing sleeve (14) for sealing the connection between the inner wall of the second channel (121) and the valve seat (30).

8. The valve box according to claim 7, characterized in that, The inner circumferential surface of the sealing sleeve (14) is used for sealing connection with the outer circumferential surface of the valve seat (30) through the second sealing ring (132); And / or, the outer peripheral surface of the sealing sleeve (14) is used for sealing connection with the inner wall of the second channel (121) via the third sealing ring (133).

9. A hydraulic end, characterized in that, include: The plunger (20), valve seat (30), valve assembly (40), and valve box (10) as described in any one of claims 1 to 8; The plunger (20) is movably disposed in the second channel (121) and can be moved into or out of the main channel (M). Both the valve seat (30) and the valve assembly (40) are located within the main channel (M).

10. A pump, characterized in that, Includes the hydraulic end as described in claim 9.

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