Valve box, fluid end and pump

Abstract

The invention discloses a valve box, a fluid end and a pump, and relates to the fields of oil gas, mines and the like. The valve box comprises a valve box body and a wear-resistant ring, the valve box body is provided with a main channel, and a first sealing ring surface is arranged in the main channel; the wear-resisting ring is arranged in the main channel, the outer circumferential face of the wear-resisting ring is connected with the first sealing ring face in a sealed mode, and the inner circumferential face of the wear-resisting ring is used for being connected with a valve seat arranged in the main channel in a sealed mode. The problem that an inner cavity of the valve box is prone to abrasion can be solved.

Description

Technical Field

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

[0002] In the related art, the valve box of the hydraulic end has an inner cavity, and the valve seat, valve assembly and other structures are all arranged in the inner cavity of the valve box. However, during the operation of the hydraulic end, the fluid will impact the valve seat, valve assembly, etc., causing the valve seat, valve assembly and other structures to easily move in the inner cavity of the valve box, thereby causing the valve seat, valve assembly and other structures to wear the valve box, and then causing the inner cavity of the valve box to be unable to be sealed and leak fluid. Summary of the Invention

[0003] The purpose of the embodiments of the present application is to provide a valve box, a hydraulic end and a pump, which can solve the problem of easy wear of the inner cavity of the valve box.

[0004] In order to solve the above technical problems, this application is implemented as follows: The embodiment of the present application provides a valve box, comprising: a valve box body and a wear-resistant ring; The valve box body is provided with a main channel, and a first sealing annular surface is provided in the main channel; The wear-resistant ring is arranged in the main channel, and the outer circumference of the wear-resistant ring is sealed with the first sealing ring surface, and the inner circumference of the wear-resistant ring is used for sealing with the valve seat arranged in the main channel.

[0005] The embodiment of the present application also discloses a hydraulic end, comprising: a valve seat, a suction valve assembly, a discharge valve assembly, a plunger, and the valve box; The valve seat, the suction valve assembly and the discharge valve assembly are respectively arranged in the main channel of the valve box, and the plunger is movably arranged in the main channel.

[0006] An embodiment of the present application also provides a pump comprising the above-mentioned hydraulic end.

[0007] In the embodiment of the present application, a wear-resistant ring is provided in the main channel of the valve box body, so that the valve seat can be separated from the inner wall of the main channel, so that the wear-resistant ring contacts the valve seat to limit the valve seat and withstand the force of the valve seat, thereby effectively preventing the valve seat from directly wearing the valve box body. Therefore, it can not only improve the installation stability of the valve seat, but also alleviate the wear of the valve box, ensure the sealing inside the valve box, and also extend the service life of the valve box. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 A schematic cross-sectional view of the hydraulic end disclosed in an embodiment of the present application; Figure 2This is a cross-sectional schematic diagram of the valve box disclosed in the embodiment of the present application.

[0009] Description of reference numerals: 10-valve box; 11 - valve box body; 11a - main channel; 111 - high-pressure chamber; 112 - low-pressure chamber; 113 - alternating chamber; 114 - liquid inlet channel; 115 - liquid discharge channel; 1161 - first sealing annular surface; 1162 - first limiting annular surface; 117 - first ring groove; 118 - second limiting annular surface; 12 - wear-resistant ring; 20-valve seat; 21-second ring groove; 30-Inhalation valve assembly; 40-discharge valve assembly; 50- plunger; 61-first sealing ring; 62-second sealing ring. DETAILED DESCRIPTION

[0010] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0011] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0012] The embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0013] refer to Figure 1 and Figure 2 The embodiment of the present application discloses a valve box 10 , which includes a valve box body 11 and a wear-resistant ring 12 .

[0014] The valve box body 11 is a basic component, which can provide an installation basis for the wear-resistant ring 12. In addition, the valve box body 11 can also provide an installation basis for other components, such as the plunger 50, the suction valve assembly 30, the discharge valve assembly 40, the valve seat 20, etc.

[0015] Among them, the valve box body 11 is provided with a main channel 11a, through which the plunger 50, the suction valve assembly 30, the discharge valve assembly 40, the valve seat 20 and other components can be accommodated, so that during the reciprocating movement of the plunger 50, the fluid is sucked into the main channel 11a and pressurized in the main channel 11a, and finally the pressurized fluid is discharged.

[0016] Considering that the valve seat 20 is arranged in the main channel 11a, during the process of pressurizing the fluid, the fluid will have an impact on the valve seat 20, which may easily cause the valve seat 20 to vibrate in the main channel 11a. During the vibration of the valve seat 20, it will produce relative displacement with the valve box body 11, thus causing mutual collision and friction between the valve seat 20 and the valve box body 11. Over time, it may easily cause damage to the valve box body 11, resulting in sealing failure and affecting the service life of the valve box 10.

[0017] Based on the above situation, in the embodiment of the present application, a first sealing ring surface 1161 is provided in the main channel 11a, and a wear-resistant ring 12 is provided in the main channel 11a. The outer peripheral surface of the wear-resistant ring 12 is sealedly connected to the first sealing ring surface 1161, and the inner peripheral surface of the wear-resistant ring 12 is used to be sealedly connected to the valve seat 20 provided in the main channel 11a. Based on this, the wear-resistant ring 12 connects the valve seat 20 to the inner wall of the main channel 11a, thereby effectively preventing the valve seat 20 from moving relative to the valve box body 11 and causing damage to the valve box body 11. In addition, the wear-resistant ring 12 can be sealedly connected to the first sealing ring surface 1161 and the valve seat 20 respectively, thereby ensuring the sealing between the valve seat 20 and the valve box body 11 and effectively preventing fluid leakage. It should be noted here that the sealing connection between the outer peripheral surface of the wear-resistant ring 12 and the first sealing ring surface 1161 can be that the outer peripheral surface of the wear-resistant ring 12 and the first sealing ring surface 1161 are directly in contact and sealed, or that the outer peripheral surface of the wear-resistant ring 12 and the first sealing ring surface 1161 are indirectly sealed through other sealing structures.

[0018] In the embodiment of the present application, a wear-resistant ring 12 is provided in the main channel 11a of the valve box body 11, so that the valve seat 20 can be separated from the inner wall of the main channel 11a, so that the wear-resistant ring 12 contacts the valve seat 20 to limit the valve seat 20 and withstand the force of the valve seat 20, thereby effectively preventing the valve seat 20 from directly wearing the valve box body 11. Therefore, it can not only improve the installation stability of the valve seat 20, but also alleviate the wear of the valve box body 11, ensure the sealing inside the valve box body 11, and also extend the service life of the valve box body 11.

[0019] refer to Figure 2 In some embodiments, the main channel 11a may include a high-pressure chamber 111, a low-pressure chamber 112 and an alternating chamber 113 (i.e., a plunger chamber), and the high-pressure chamber 111, the low-pressure chamber 112 and the alternating chamber 113 are arranged in sequence along the axial direction of the valve box 10, wherein the high-pressure chamber 111 is used to accommodate pressurized fluid, the low-pressure chamber 112 is used to accommodate inhaled low-pressure fluid, and the alternating chamber 113 is used to pressurize the fluid through the plunger 50.

[0020] The valve box body 11 may also be provided with a liquid inlet channel 114 and a liquid discharge channel 115, wherein the liquid inlet channel 114 is in communication with the low-pressure chamber 112, the liquid discharge channel 115 is in communication with the high-pressure chamber 111, and the alternating chamber 113 is arranged opposite to the plunger 50 of the hydraulic end. Based on this, during the reciprocating movement of the plunger 50, the fluid can flow into the low-pressure chamber 112 via the liquid inlet channel 114, and then enter the alternating chamber 113 from the low-pressure chamber 112 through the suction valve assembly 30. The fluid is squeezed by the plunger 50 in the alternating chamber 113 to achieve pressurization. The pressurized fluid flows into the liquid discharge chamber through the discharge valve assembly 40, and is finally discharged through the liquid discharge channel 115.

[0021] The first sealing annular surface 1161 is located in the communication area between the low-pressure chamber 112 and the alternating chamber 113. Optionally, the first sealing annular surface 1161 may be located within the low-pressure chamber 112 close to the alternating chamber 113, within the alternating chamber 113 close to the low-pressure chamber 112, or between the low-pressure chamber 112 and the alternating chamber 113. The specific setting may be based on actual needs.

[0022] It should be noted here that by arranging structures such as a wear-resistant ring 12 and a valve seat 20 at the first sealing ring surface 1161, the main channel 11a can be divided into a low-pressure chamber 112 and an alternating chamber 113 to avoid the low-pressure chamber 112 and the alternating chamber 113 being connected to each other and causing fluid leakage.

[0023] In some embodiments, the inner wall of the low-pressure chamber 112 may be provided with a first limiting ring surface 1162 . The first limiting ring surface 1162 is provided on a side of the first sealing ring surface 1161 close to the alternating chamber 113 .

[0024] In addition, the axis of the first sealing ring surface 1161 can be parallel to the axis of the valve box 10, and the first limiting ring surface 1162 can be perpendicular to the axis of the valve box 10, or at other angles. In this way, a shoulder can be formed between the first sealing ring surface 1161 and the first limiting ring surface 1162 to facilitate the installation of the wear-resistant ring 12.

[0025] Optionally, the axial end face of the wear-resistant ring 12 abuts against the first limiting ring surface 1162, and the radial outer peripheral surface of the wear-resistant ring 12 is sealed with the first sealing ring surface 1161. In this way, the wear-resistant ring 12 can be limited in the axial and radial directions respectively by the joint action of the first limiting ring surface 1162 and the first sealing ring surface 1161, thereby ensuring the installation stability of the wear-resistant ring 12 and the sealing between the wear-resistant ring 12 and the valve box body 11.

[0026] Furthermore, at least one of the first sealing ring surface 1161 and the outer peripheral surface of the wear-resistant ring 12 may be provided with a first annular groove 117. The valve housing 10 may further include a first sealing ring 61, which is disposed in the first annular groove 117 and seals the outer peripheral surface of the wear-resistant ring 12 against the first sealing ring surface 1161. Thus, the first sealing ring 61 can provide a seal between the outer periphery of the wear-resistant ring 12 and the first sealing ring surface 1161, thereby further improving the sealing between the wear-resistant ring 12 and the valve housing body 11 and effectively preventing fluid leakage.

[0027] In some embodiments, the wear-resistant ring 12 has an interference fit or a transition fit with the first sealing ring surface 1161. Based on this, the stability of the wear-resistant ring 12 can be ensured in the radial direction, so that the wear-resistant ring 12 will not move in the radial direction, and it can also play a certain sealing role to alleviate the leakage problem.

[0028] In some embodiments, the hardness of the wear-resistant ring 12 may be no less than the hardness of the valve box body 11 , so that the service life of the wear-resistant ring 12 can be improved to alleviate the problem of the wear-resistant ring 12 being damaged by friction and collision with the valve seat 20 .

[0029] In some embodiments, the inner wall of the low-pressure chamber 112 may be provided with a second limiting annular surface 118, which is arranged around the circumference of the valve box 10. Based on this, the second limiting annular surface 118 can limit the suction valve assembly 30 to ensure the installation stability of the suction valve assembly 30.

[0030] Optionally, the first limiting annular surface 1162 may have a straight edge, a beveled edge, or a curved edge (e.g., an arcuate edge). Of course, other forms are also possible and are not specifically limited here. It should be noted that the straight edge, beveled edge, or curved edge herein can be understood as the contour line of the first limiting annular surface 1162 in the longitudinal cross-section.

[0031] The second limiting annular surface 118 can have straight edges, oblique edges, or curved edges (e.g., arcuate edges), and other shapes are also possible, which are not specifically limited here. It should be noted that the straight edges, oblique edges, or curved edges here can be understood as the contour lines of the second limiting annular surface 118 in the longitudinal section.

[0032] Based on the above-mentioned valve box 10, the embodiment of the present application also discloses a hydraulic end, which includes a valve seat 20, a suction valve assembly 30, a discharge valve assembly 40 and a plunger 50 respectively arranged in the main channel 11a and the valve box 10, and the valve seat 20, the suction valve assembly 30 and the discharge valve assembly 40 are respectively arranged in the main channel 11a of the valve box 10, and the plunger 50 is movably arranged in the main channel 11a.

[0033] Specifically, the valve seat 20 is arranged in the low-pressure chamber 112 and corresponds to the liquid inlet channel 114. The suction valve assembly 30 is arranged in the communication area between the low-pressure chamber 112 and the alternating chamber 113. The discharge valve assembly 40 is arranged in the communication area between the high-pressure chamber 111 and the low-pressure chamber 112 and corresponds to the liquid discharge channel 115. The plunger 50 is movably arranged in the valve box 10, and at least part of the plunger 50 can be moved into or out of the alternating chamber 113.

[0034] Based on the above arrangement, during the reciprocating movement of the plunger 50, the suction valve assembly 30 and the discharge valve assembly 40 can each be periodically opened or closed so that the fluid is sucked into the low-pressure chamber 112 and flows into the alternating chamber 113 for pressurization, and then flows into the high-pressure chamber 111 after pressurization and is finally discharged.

[0035] refer to Figure 1 In some embodiments, the hydraulic end may further include a second sealing ring 62. A second annular groove 21 may be provided on either the outer circumference of the valve seat 20 or the inner circumference of the wear-resistant ring 12. The second sealing ring 62 is disposed in the second annular groove 21 and seals the outer circumference of the valve seat 20 with the inner circumference of the wear-resistant ring 12. Thus, the second sealing ring 62 can achieve a seal between the outer circumference of the valve seat 20 and the inner circumference of the wear-resistant ring 12 to prevent fluid leakage.

[0036] Based on the above-mentioned hydraulic end, an embodiment of the present application further discloses a pump, and the disclosed pump includes the above-mentioned hydraulic end.

[0037] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A valve box, characterized in that: include: Valve box body (11) and wear ring (12); The valve box body (11) is provided with a main channel (11a), and a first sealing annular surface (1161) is provided in the main channel (11a); The wear-resistant ring (12) is arranged in the main channel (11a), and the outer peripheral surface of the wear-resistant ring (12) is sealedly connected to the first sealing ring surface (1161), and the inner peripheral surface of the wear-resistant ring (12) is used for sealing connection with the valve seat (20) arranged in the main channel (11a).

2. The valve box according to claim 1, characterized in that: The main channel (11a) comprises a high-pressure chamber (111), a low-pressure chamber (112), and an alternating chamber (113), wherein the high-pressure chamber (111), the low-pressure chamber (112), and the alternating chamber (113) are arranged in sequence along the axial direction of the valve box (10); The valve box body (11) is further provided with a liquid inlet channel (114) and a liquid discharge channel (115), wherein the liquid inlet channel (114) is communicated with the low-pressure chamber (112), and the liquid discharge channel (115) is communicated with the high-pressure chamber (111), and the alternating chamber (113) is arranged opposite to the plunger (50) of the hydraulic end; The first sealing annular surface (1161) is located in the communication area between the low-pressure chamber (112) and the alternating chamber (113).

3. The valve box according to claim 2, characterized in that: The inner wall of the low-pressure chamber (112) is provided with a first limiting annular surface (1162), and the first limiting annular surface (1162) is provided on a side of the first sealing annular surface (1161) close to the alternating chamber (113); The wear-resistant ring (12) abuts against the first limiting ring surface (1162).

4. The valve box according to claim 2 or 3, characterized in that: At least one of the first sealing ring surface (1161) and the outer peripheral surface of the wear-resistant ring (12) is provided with a first annular groove (117); The valve box (10) further comprises a first sealing ring (61), wherein the first sealing ring (61) is arranged in the first ring groove (117) and seals the outer peripheral surface of the wear-resistant ring (12) and the first sealing ring surface (1161).

5. The valve box according to claim 1, characterized in that: The wear-resistant ring (12) and the first sealing ring surface (1161) are in interference fit or transition fit.

6. The valve box according to claim 1, characterized in that: The hardness of the wear-resistant ring (12) is not less than the hardness of the valve box body (11).

7. The valve box according to claim 3, characterized in that: The inner wall of the alternating chamber (113) is provided with a second limiting annular surface (118) arranged along the circumference of the valve box (10).

8. The valve box according to claim 7, characterized in that: The first limiting annular surface (1162) has a straight edge, a beveled edge, or a curved edge; And / or, the second limiting annular surface (118) has a straight edge, a beveled edge, or a curved edge.

9. A hydraulic end, characterized in that: include: A valve seat (20), a suction valve assembly (30), a discharge valve assembly (40), a plunger (50), and a valve box (10) according to any one of claims 1 to 8; The valve seat (20), the suction valve assembly (30) and the discharge valve assembly (40) are respectively arranged in the main channel (11a) of the valve box (10), and the plunger (50) is movably arranged in the main channel (11a).

10. The fluid end according to claim 9, characterized in that: The hydraulic end further includes a second sealing ring (62); A second annular groove (21) is provided on one of the outer circumferential surface of the valve seat (20) and the inner circumferential surface of the wear-resistant ring (12). The second sealing ring (62) is provided in the second annular groove (21) and seals and connects the outer circumferential surface of the valve seat (20) and the inner circumferential surface of the wear-resistant ring (12).

11. A pump, characterized in that: Comprising the liquid end according to claim 9 or 10.

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