Valve box, fluid end and pump

Abstract

The utility model 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] 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 the hydraulic end has an inner cavity, and the valve seat, valve assembly and other structures are all located 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 and other structures, causing the valve seat, valve assembly and other structures to move easily in the inner cavity of the valve box. This causes the valve seat, valve assembly and other structures to wear on the valve box, which in turn leads to the problem that the inner cavity of the valve box cannot be sealed and the fluid leaks. Utility Model Content

[0003] The purpose of this application is to provide a valve box, hydraulic end, and pump that can solve problems such as easy wear of the valve box's inner cavity.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows:

[0005] This application provides a valve box, including: a valve box body and a wear-resistant ring;

[0006] The valve box body is provided with a main channel, and a first sealing ring surface is provided in the main channel;

[0007] The wear-resistant ring is disposed in the main channel, and the outer circumferential surface of the wear-resistant ring is sealed to the surface of the first sealing ring. The inner circumferential surface of the wear-resistant ring is used to seal to the valve seat disposed in the main channel.

[0008] This application also discloses a hydraulic end, including: a valve seat, a suction valve assembly, a discharge valve assembly, a plunger, and the valve box described above;

[0009] The valve seat, the suction valve assembly, and the discharge valve assembly are respectively located in the main channel of the valve box, and the plunger is movably located in the main channel.

[0010] This application also provides a pump, including the hydraulic end described above.

[0011] In this embodiment, by setting a wear-resistant ring in the main channel of the valve body, the valve seat can be separated from the inner wall of the main channel. The wear-resistant ring contacts the valve seat to limit the valve seat and bear the force of the valve seat, thereby effectively preventing the valve seat from directly wearing the valve body. Therefore, it can improve the installation stability of the valve seat, alleviate the wear of the valve body, ensure the sealing of the valve body, and extend the service life of the valve body. Attached Figure Description

[0012] Figure 1This is a cross-sectional schematic diagram of the hydraulic end disclosed in the embodiments of this application;

[0013] Figure 2 This is a cross-sectional schematic diagram of the valve box disclosed in the embodiments of this application.

[0014] Explanation of reference numerals in the attached figures:

[0015] 10-Valve box;

[0016] 11-Valve box body; 11a-Main channel; 111-High pressure chamber; 112-Low pressure chamber; 113-Alternating chamber; 114-Inlet channel; 115-Drain channel; 1161-First sealing ring surface; 1162-First limiting ring surface; 117-First ring groove; 118-Second limiting ring surface; 12-Wear-resistant ring;

[0017] 20 - Valve seat; 21 - Second annular groove;

[0018] 30 - Inhalation valve assembly;

[0019] 40 - Exhaust valve components;

[0020] 50-plunger;

[0021] 61 - First sealing ring; 62 - Second sealing ring. Detailed Implementation

[0022] 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.

[0023] 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.

[0024] The embodiments of this application will be described in detail below with reference to the accompanying drawings and specific examples and application scenarios.

[0025] refer to Figure 1 and Figure 2This application discloses a valve box 10, which includes a valve box body 11 and a wear-resistant ring 12.

[0026] The valve body 11 is a basic component that can provide an installation base for the wear ring 12. In addition, the valve body 11 can also provide an installation base for other components, such as the plunger 50, the suction valve assembly 30, the discharge valve assembly 40, and the valve seat 20.

[0027] The valve box body 11 is provided with a main channel 11a, which can accommodate components such as plunger 50, suction valve assembly 30, discharge valve assembly 40, and valve seat 20, so that fluid can be drawn into the main channel 11a and pressurized in the main channel 11a during the reciprocating movement of plunger 50, and finally the pressurized fluid can be discharged.

[0028] Considering that the valve seat 20 is located in the main channel 11a, during the process of pressurizing the fluid, the fluid will impact the valve seat 20, which can easily cause the valve seat 20 to vibrate in the main channel 11a. During the vibration of the valve seat 20, it will have relative displacement with the valve body 11. This will cause the valve seat 20 and the valve body 11 to collide and rub against each other. Over time, this can easily cause damage to the valve body 11, leading to sealing failure and affecting the service life of the valve body 10.

[0029] Based on the above, in this embodiment, a first sealing ring surface 1161 is provided inside the main channel 11a, and a wear-resistant ring 12 is disposed inside the main channel 11a. The outer circumferential surface of the wear-resistant ring 12 is sealed to the first sealing ring surface 1161, and the inner circumferential surface of the wear-resistant ring 12 is used to seal to the valve seat 20 disposed inside the main channel 11a. Therefore, by connecting the valve seat 20 to the inner wall of the main channel 11a through the wear-resistant ring 12, damage to the valve body 11 caused by movement of the valve seat 20 relative to the valve body 11 can be effectively prevented. Furthermore, the wear-resistant ring 12 can be sealed to both the first sealing ring surface 1161 and the valve seat 20, thereby ensuring the sealing between the valve seat 20 and the valve body 11 and effectively preventing fluid leakage. It should be noted that the sealing connection between the outer circumferential surface of the wear-resistant ring 12 and the first sealing ring surface 1161 can be that the outer circumferential surface of the wear-resistant ring 12 directly contacts and seals the first sealing ring surface 1161, or that the outer circumferential surface of the wear-resistant ring 12 and the first sealing ring surface 1161 are indirectly sealed through other sealing structures.

[0030] In this embodiment, by providing a wear-resistant ring 12 inside the main channel 11a of the valve body 11, the valve seat 20 can be separated from the inner wall of the main channel 11a. The wear-resistant ring 12 contacts the valve seat 20 to limit its movement and bear the force exerted by the valve seat 20. This effectively prevents the valve seat 20 from directly wearing the valve body 11. Therefore, it can improve the installation stability of the valve seat 20, alleviate the wear of the valve body 11, ensure the sealing of the valve body 11, and extend the service life of the valve body 11.

[0031] 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 sequentially along the axial direction of the valve box 10. The high-pressure chamber 111 is used to contain the pressurized fluid, the low-pressure chamber 112 is used to contain the sucked-in low-pressure fluid, and the alternating chamber 113 is used to pressurize the fluid through the plunger 50.

[0032] The valve body 11 may also be provided with an inlet channel 114 and a outlet channel 115. The inlet channel 114 is connected to the low-pressure chamber 112, and the outlet channel 115 is connected to the high-pressure chamber 111. The alternating chamber 113 is used to be arranged opposite to the plunger 50 at the hydraulic end. Based on this, during the reciprocating movement of the plunger 50, the fluid can flow into the low-pressure chamber 112 through the inlet channel 114, and then enter the alternating chamber 113 through the suction valve assembly 30. In the alternating chamber 113, the fluid is pressurized by the compression of the plunger 50. The pressurized fluid flows into the outlet chamber through the outlet valve assembly 40, and finally is discharged through the outlet channel 115.

[0033] 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 in the low-pressure chamber 112 near the alternating chamber 113, or in the alternating chamber 113 near the low-pressure chamber 112, or between the low-pressure chamber 112 and the alternating chamber 113, depending on actual needs.

[0034] It should be noted that by setting 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 fluid leakage caused by communication between the low-pressure chamber 112 and the alternating chamber 113.

[0035] In some embodiments, the inner wall of the low-pressure chamber 112 may be provided with a first limiting annular surface 1162, which is located on the side of the first sealing annular surface 1161 near the alternating chamber 113.

[0036] 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.

[0037] Optionally, the axial end face of the wear ring 12 abuts against the first limiting ring surface 1162, and the radial outer circumferential surface of the wear ring 12 is sealed to the first sealing ring surface 1161. In this way, the wear ring 12 can be limited in the axial and radial directions by the combined action of the first limiting ring surface 1162 and the first sealing ring surface 1161, ensuring the installation stability of the wear ring 12 and also ensuring the sealing between the wear ring 12 and the valve box body 11.

[0038] Furthermore, at least one of the first sealing ring surface 1161 and the outer peripheral surface of the wear ring 12 may be provided with a first annular groove 117. The valve box 10 may also include a first sealing ring 61, which is disposed in the first annular groove 117 and sealably connects the outer peripheral surface of the wear ring 12 to the first sealing ring surface 1161. Based on this, the first sealing ring 61 can play a sealing role between the outer peripheral surface of the wear ring 12 and the first sealing ring surface 1161, thereby further improving the sealing performance between the wear ring 12 and the valve box body 11 and effectively preventing fluid leakage.

[0039] In some embodiments, the wear ring 12 is interference-fitted or transition-fitted with the first sealing ring surface 1161. Based on this, the stability of the wear ring 12 can be ensured in the radial direction, so that the wear ring 12 will not move in the radial direction, and it can also play a certain sealing role to alleviate leakage problems.

[0040] In some embodiments, the hardness of the wear ring 12 may be no less than the hardness of the valve body 11. This can improve the service life of the wear ring 12 and alleviate the problem of the wear ring 12 being damaged by friction and collision with the valve seat 20.

[0041] 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 circumferentially around the valve box 10. Based on this, the suction valve assembly 30 can be limited by the second limiting annular surface 118 to ensure the installation stability of the suction valve assembly 30.

[0042] Optionally, the first limiting toroidal surface 1162 may have a straight edge, a slanted edge, or a curved edge (e.g., an arc edge), etc. Of course, it may also have other forms, which are not specifically limited here. It should be noted here that the straight edge, slanted edge, or curved edge can be understood as the outline of the cross-section of the first limiting toroidal surface 1162 in the longitudinal direction.

[0043] The second limiting toroidal surface 118 may have straight edges, inclined edges, or curved edges (e.g., arc edges), and of course, it may also have other forms, which are not specifically limited here. It should be noted here that the straight edges, inclined edges, or curved edges can be understood as the outline of the cross-section of the second limiting toroidal surface 118 in the longitudinal direction.

[0044] Based on the valve box 10 described above, this application embodiment also discloses a hydraulic end, which includes a valve seat 20, an intake valve assembly 30, an exhaust valve assembly 40 and a plunger 50 respectively arranged in the main channel 11a, and a valve box 10. The valve seat 20, the intake valve assembly 30 and the exhaust valve assembly 40 are respectively located in the main channel 11a of the valve box 10, and the plunger 50 is movably located in the main channel 11a.

[0045] Specifically, valve seat 20 is located in low-pressure chamber 112 and is correspondingly arranged with liquid inlet channel 114; suction valve assembly 30 is located in the communication area between low-pressure chamber 112 and alternating chamber 113; discharge valve assembly 40 is located in the communication area between high-pressure chamber 111 and low-pressure chamber 112 and is correspondingly arranged with liquid discharge channel 115; plunger 50 is movably located in valve box 10, and at least a portion of plunger 50 can move into or out of alternating chamber 113.

[0046] Based on the above configuration, during the reciprocating movement of the plunger 50, the suction valve assembly 30 and the discharge valve assembly 40 can be periodically opened or closed to allow the fluid to be drawn into the low-pressure chamber 112 and flow into the alternating chamber 113 for pressurization. After pressurization, the fluid flows into the high-pressure chamber 111 and is finally discharged.

[0047] 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 peripheral surface of the valve seat 20 or the inner peripheral surface of the wear ring 12. The second sealing ring 62 is disposed in the second annular groove 21 and seals the outer peripheral surface of the valve seat 20 and the inner peripheral surface of the wear ring 12. Therefore, the second sealing ring 62 can achieve a seal between the outer peripheral surface of the valve seat 20 and the inner peripheral surface of the wear ring 12 to prevent fluid leakage.

[0048] Based on the aforementioned hydraulic end, this application also discloses a pump, which includes the aforementioned hydraulic end.

[0049] 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 chest, characterized in that include: Valve box body (11) and wear-resistant ring (12); The valve box body (11) is provided with a main channel (11a), and a first sealing ring surface (1161) is provided in the main channel (11a). The wear-resistant ring (12) is disposed in the main channel (11a), and the outer circumferential surface of the wear-resistant ring (12) is sealed to the first sealing ring surface (1161). The inner circumferential surface of the wear-resistant ring (12) is used to seal to the valve seat (20) disposed in the main channel (11a).

2. The valve chest of claim 1, wherein, The main channel (11a) includes a high-pressure chamber (111), a low-pressure chamber (112), and an alternating chamber (113), which are arranged sequentially along the axial direction of the valve box (10). The valve box body (11) is also provided with an inlet channel (114) and a drain channel (115). The inlet channel (114) is connected to the low-pressure chamber (112), and the drain channel (115) is connected to the high-pressure chamber (111). The alternating chamber (113) is used to be arranged opposite to the plunger (50) at the hydraulic end. The first sealing ring surface (1161) is located in the connecting area of ​​the low-pressure cavity (112) and the alternating cavity (113).

3. The valve chest of claim 2, wherein, The inner wall of the low-pressure chamber (112) is provided with a first limiting annular surface (1162), which is located on the side of the first sealing annular surface (1161) near the alternating chamber (113). The wear-resistant ring (12) abuts against the first limiting ring surface (1162).

4. Valve chest 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 ring groove (117). The valve box (10) also includes 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) and the first sealing ring surface (1161).

5. The valve chest of claim 1, wherein, The wear-resistant ring (12) is either interference-fitted or transition-fitted with the first sealing ring surface (1161).

6. The valve chest of claim 1, wherein, The hardness of the wear-resistant ring (12) is not less than the hardness of the valve box body (11).

7. The valve chest of claim 3, wherein, The inner wall of the alternating cavity (113) is provided with a second limiting annular surface (118) that is arranged around the valve box (10) in the circumference.

8. The valve chest of claim 7, wherein, The first limiting annular surface (1162) has a straight edge, a sloping edge, or a curved edge; And / or, the second limiting ring surface (118) has a straight edge, a beveled edge, or a curved edge.

9. A fluid end characterized by, include: Valve seat (20), intake valve assembly (30), discharge valve assembly (40), plunger (50), and valve box (10) as described in any one of claims 1 to 8; The valve seat (20), the suction valve assembly (30) and the discharge valve assembly (40) are respectively located in the main channel (11a) of the valve box (10), and the plunger (50) is movably located in the main channel (11a).

10. The fluid end of claim 9, wherein, The hydraulic end also includes a second sealing ring (62). A second annular groove (21) is provided on one of the outer peripheral surface of the valve seat (20) and the inner peripheral surface of the wear-resistant ring (12). The second sealing ring (62) is provided in the second annular groove (21) and seals the outer peripheral surface of the valve seat (20) and the inner peripheral surface of the wear-resistant ring (12).

11. A pump characterized by Includes the hydraulic end as described in claim 9 or 10.

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