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. A valve box comprises a valve box body; the valve box body is provided with a main channel, a liquid inlet channel and a liquid outlet channel, the main channel extends in the axis direction of the valve box, penetrates through the two end faces of the valve box body and is used for containing a valve seat and a valve assembly of the fluid end, and the liquid inlet channel and the liquid outlet channel are communicated with the main channel. A first limiting part arranged in the circumferential direction of the valve box in a surrounding mode is arranged on the inner wall of the main channel, and the first limiting part is located at the position close to the liquid inlet channel and used for limiting the valve seat. The problems that the valve box and structural parts are damaged, noise and vibration are generated and the like due to movement and collision of the structural parts in the valve box 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 some hydraulic terminals in related technologies, various valves and other structural components are installed in the valve box. During the operation of the hydraulic terminal, the fracturing fluid will generate an impact force on the structural components in the valve box along the valve box axis, which will cause the structural components to move or collide within the valve box, easily leading to damage to the valve box and structural components, as well as generating noise and vibration. Utility Model Content

[0003] The purpose of this application is to provide a valve box and hydraulic end that can solve problems such as damage to the valve box and structural components caused by movement and impact of internal structural components, resulting in noise and vibration.

[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;

[0006] The valve box body is provided with a main channel, an inlet channel and an outlet channel. The main channel extends along the axial direction of the valve box and passes through both ends of the valve box body, and is used to accommodate the valve seat and valve assembly of the hydraulic end. The inlet channel and the outlet channel are respectively connected to the main channel.

[0007] The inner wall of the main channel is provided with a first limiting part that is arranged around the circumference of the valve box. The first limiting part is located near the liquid inlet channel and is used to limit the valve seat.

[0008] This application embodiment also provides another valve box, including: a valve box body;

[0009] The valve box body is provided with a main channel, an inlet channel and an outlet channel. The main channel extends along the axial direction of the valve box and passes through both ends of the valve box body to accommodate the valve seat and the valve assembly. The inlet channel and the outlet channel are respectively connected to the main channel.

[0010] The inner wall of the main channel is provided with a second limiting part that is arranged around the circumference of the valve box. Along the axial direction, the second limiting part is located on the side of the liquid inlet channel opposite to the liquid outlet channel, and is used to limit the suction valve assembly.

[0011] This application also provides a hydraulic end, including the valve box described above.

[0012] This application also provides a pump, including the hydraulic end described above.

[0013] In this embodiment, the main channel can accommodate the valve seat and valve assembly of the hydraulic end, so that fluid can be drawn into the valve box, pressurized and discharged from the valve box; and the first limiting part can limit the valve seat so that the valve seat will not move arbitrarily when subjected to fluid impact, thus ensuring the stability of the valve seat. This can effectively avoid damage to components caused by friction and collision between the valve seat and the valve box, and can also alleviate noise and vibration problems. Attached Figure Description

[0014] Figure 1 This is a cross-sectional schematic diagram of the valve box disclosed in the embodiments of this application;

[0015] Figure 2 This is a partial cross-sectional schematic diagram of the hydraulic end disclosed in the embodiments of this application.

[0016] Explanation of reference numerals in the attached figures:

[0017] 10-valve box; 11-valve box body;

[0018] 111-Main channel; 111a-High pressure chamber; 111b-Low pressure chamber; 111c-Alternating chamber; 111c1-First chamber segment; 111c2-Second chamber segment; 111c3-Third chamber segment; 111d-First limiting part; 111d1-First sealing ring surface; 111d2-First limiting ring surface; 111e-Second limiting part; 112-Liquid inlet channel; 113-Liquid outlet channel;

[0019] 20-Plunger;

[0020] 30 - Valve seat;

[0021] 40 - Inhalation valve assembly;

[0022] 50 - Discharge valve components. Detailed Implementation

[0023] 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.

[0024] 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.

[0025] The embodiments of this application will be described in detail below with reference to the accompanying drawings and specific examples and application scenarios.

[0026] refer to Figure 1 and Figure 2 This application discloses a valve box 10 for use in a hydraulic system. The valve box 10 includes a valve box body 11. In addition, the valve box 10 may also include other components, which are not specifically limited here.

[0027] The valve body 11 is provided with a main channel 111, an inlet channel 112, and an outlet channel 113. The main channel 111 extends along the axis of the valve body 10 and penetrates both ends of the valve body 11, accommodating the valve seat 30 and valve assembly at the hydraulic end. Optionally, the valve assembly can be divided into an intake valve assembly 40 and a discharge valve assembly 50, with the valve seat 30 serving a supporting and load-bearing function. The inlet channel 112 and the outlet channel 113 are respectively connected to the main channel 111, allowing fluid to enter the main channel 111 via the inlet channel 112, be pressurized within the main channel 111, and then be discharged via the outlet channel 113.

[0028] Specifically, during hydraulic operation, the plunger 20 reciprocates, causing the suction valve assembly 40 and the discharge valve assembly 50 to open or close periodically, thereby enabling the fluid to be drawn in through the inlet channel 112, pressurized in the main channel 111, and finally discharged through the outlet channel 113.

[0029] Based on the above configuration, in this embodiment, the valve seat 30, valve assembly, etc. are arranged in the main channel 111 along the axial direction of the valve box 10, and the plunger 20 also moves back and forth along the axial direction of the valve box 10, so that the plunger 20 can move into or out of the main channel 111. Thus, in this embodiment, the arrangement direction of the suction valve assembly 40 and the discharge valve assembly 50 is parallel to the movement direction of the plunger 20. Compared with the vertical arrangement method in related technologies, the valve box 10 in this embodiment does not have an intersection line formed by vertical arrangement, which can effectively alleviate the problem of erosion caused by the impact of pressurized fluid on the intersection line, and thus extend the service life of the valve box 10.

[0030] The inner wall of the main channel 111 may be provided with a first limiting part 111d that is arranged circumferentially around the valve box 10. The first limiting part 111d is located near the liquid inlet channel 112 and is used to limit the valve seat 30. Based on this, the limiting effect of the first limiting part 111d can limit the valve seat 30 to prevent the valve seat 30 from moving randomly after being impacted by fluid.

[0031] In this embodiment, the main channel 111 can accommodate the hydraulic valve seat 30 and the valve assembly, so that fluid can be drawn into the valve box 10, pressurized, and discharged from the valve box 10. Furthermore, the first limiting part 111d can limit the valve seat 30 so that the valve seat 30 will not move arbitrarily when subjected to fluid impact, thus ensuring the stability of the valve seat 30. This can effectively prevent damage to components caused by friction and collision between the valve seat 30 and the valve box 10, and can also alleviate noise and vibration problems.

[0032] In some embodiments, the main channel 111 may include a high-pressure chamber 111a, a low-pressure chamber 111b, and an alternating chamber 111c that are sequentially connected along the axial direction of the valve box 10. The outlet channel 113 is connected to the high-pressure chamber 111a so that the pressurized fluid contained in the high-pressure chamber 111a can be discharged through the outlet channel 113; the inlet channel 112 is connected to the low-pressure chamber 111b so that fluid can be drawn into the low-pressure chamber 111b through the inlet channel 112; the alternating chamber 111c is arranged opposite to the plunger 20 at the hydraulic end so that the fluid in the alternating chamber 111c can be pressurized during the reciprocating movement of the plunger 20.

[0033] The first limiting part 111d is located in the communication area between the low-pressure cavity 111b and the alternating cavity 111c. Optionally, the first limiting part 111d can be located inside the low-pressure cavity 111b, inside the alternating cavity 111c, or between the low-pressure cavity 111b and the alternating cavity 111c, which can be set according to actual needs.

[0034] In some more specific embodiments, the first limiting part 111d may include a first limiting annular surface 111d2, which is disposed in the low-pressure chamber 111b on the side near the alternating chamber 111c. The first limiting annular surface 111d2 is used to abut against the end face of the valve seat 30 to limit the valve seat 30 in the axial direction.

[0035] It should be noted that the cross-sectional area of ​​the low-pressure chamber 111b and the cross-sectional area of ​​the alternating chamber 111c may be different, resulting in the formation of a first limiting annular surface 111d2 at the junction of the two. The axis of the first limiting annular surface 111d2 may be parallel to or at an acute angle to the axis of the valve box 10. In this way, the valve seat 30 can be limited in the axial direction by the first limiting annular surface 111d2 to ensure the stability of the valve seat 30.

[0036] Optionally, the projection of the first limiting portion 111d onto the first plane can be a straight line or a curve, wherein the first plane is parallel to the axial direction. For example, the straight line can be perpendicular to the axis of the valve box 10 or form an acute angle; the curve can include an arc or a broken line.

[0037] In some embodiments, the inner wall of the low-pressure chamber 111b may be provided with a first sealing ring surface 111d1 that is arranged circumferentially around the valve box 10. The first sealing ring surface 111d1 is located on the side of the first limiting ring surface 111d2 that is away from the alternating chamber 111c, and is used to limit the valve seat 30 in the radial direction.

[0038] Specifically, the outer circumferential surface of the valve seat 30 can be sealed to the first sealing ring surface 111d1, for example, by direct contact to achieve a sealed connection, or by indirect contact (i.e., by setting other components between the two) to achieve a sealed connection.

[0039] Based on the above settings, the valve seat 30 can be limited both radially and axially by the cooperation of the first sealing ring surface 111d1 and the first limiting ring surface 111d2, which further improves the installation stability of the valve seat 30, prevents the valve seat 30 from moving randomly and colliding with the valve box 10, and effectively alleviates noise, vibration and other problems.

[0040] This application also discloses another type of valve box 10, which includes a valve box body 11. The valve box body 11 is provided with a main channel 111, an inlet channel 112, and an outlet channel 113. The main channel 111 extends along the axial direction of the valve box 10 and penetrates both ends of the valve box body 11, and is used to accommodate the valve seat 30 and the valve assembly of the hydraulic end. The inlet channel 112 and the outlet channel 113 are respectively connected to the main channel 111.

[0041] The inner wall of the main channel 111 may be provided with a second limiting part 111e that is arranged circumferentially around the valve box 10. The second limiting part 111e is located on the side of the inlet channel 112 opposite to the outlet channel 113 and is used to limit the suction valve assembly 40. Based on this, under the limiting action of the second limiting part 111e, the suction valve assembly 40 can be limited to prevent it from moving freely after being impacted by fluid, thus ensuring the stability of the suction valve assembly 40. This can effectively avoid damage to components caused by friction and collision between the suction valve assembly 40 and the valve box 10, and can also alleviate noise and vibration problems.

[0042] In some embodiments, the main channel 111 may include a high-pressure chamber 111a, a low-pressure chamber 111b, and an alternating chamber 111c that are sequentially connected along the axial direction of the valve box 10. The outlet channel 113 is connected to the high-pressure chamber 111a so that the pressurized fluid contained in the high-pressure chamber 111a can be discharged through the outlet channel 113; the inlet channel 112 is connected to the low-pressure chamber 111b so that fluid can be drawn into the low-pressure chamber 111b through the inlet channel 112; the alternating chamber 111c is arranged opposite to the plunger 20 at the hydraulic end so that the fluid in the alternating chamber 111c can be pressurized during the reciprocating movement of the plunger 20.

[0043] The second limiting part 111e is located on the inner wall of the alternating cavity 111c to limit the intake valve assembly 40, which is at least partially located in the alternating cavity 111c.

[0044] Optionally, the second limiting part 111e may include a second limiting annular surface, the axis of which may be parallel to or at an acute angle to the axis of the valve box 10. In this way, the suction valve assembly 40 can be limited in the axial direction by the second limiting annular surface to ensure the stability of the suction valve assembly 40.

[0045] Optionally, the projection of the second limiting portion 111e onto the first plane can be a straight line or a curve, wherein the first plane is parallel to the axial direction. For example, the straight line can be perpendicular to the axis of the valve box 10 or form an acute angle; the curve can include an arc or a broken line.

[0046] In some more specific embodiments, the alternating cavity 111c may include a first cavity segment 111c1 and a second cavity segment 111c2 connected sequentially along the axial direction. The first cavity segment 111c1 is connected to the low-pressure cavity 111b, and the second cavity segment 111c2 is positioned opposite to the plunger 20. The cross-sectional area of ​​the first cavity segment 111c1 is larger than the cross-sectional area of ​​the second cavity segment 111c2, so that a second limiting portion 111e is formed on the inner wall at the junction of the first cavity segment 111c1 and the second cavity segment 111c2.

[0047] Optionally, the first cavity segment 111c1 and the second cavity segment 111c2 can be connected by a third cavity segment 111c3, wherein the first cavity segment 111c1 and the second cavity segment 111c2 can both be cylindrical cavity segments, and the third cavity segment 111c3 can be a frustum cavity segment.

[0048] It should be noted that the main difference between the valve box 10 in the two embodiments described above is that one of them is provided with a first limiting part 111d and the other is provided with a second limiting part 111e, while the other structures are the same. Of course, the embodiments of this application can also provide a valve box 10 that is provided with both a first limiting part 111d and a limiting part.

[0049] Based on the various forms of valve box 10 described above, this application also discloses a hydraulic end, which includes the valve box 10 mentioned above. In addition, it may also include components such as plunger 20, valve seat 30, suction valve assembly 40, and discharge valve assembly 50 to ensure that the hydraulic end can operate normally.

[0050] Based on the aforementioned hydraulic end, this application also discloses a pump, which includes the aforementioned hydraulic end. The pump can be a plunger pump and can be applied in the field of fracturing, such as a fracturing pump.

[0051] 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); The valve box body (11) is provided with a main channel (111), an inlet channel (112) and an outlet channel (113). The main channel (111) extends along the axial direction of the valve box (10) and passes through both ends of the valve box body (11) to accommodate the valve seat (30) and valve assembly of the hydraulic end. The inlet channel (112) and the outlet channel (113) are respectively connected to the main channel (111). The inner wall of the main channel (111) is provided with a first limiting part (111d) arranged around the valve box (10) in the circumference. The first limiting part (111d) is located near the liquid inlet channel (112) and is used to limit the valve seat (30).

2. The valve chest of claim 1, wherein, The main channel (111) includes a high-pressure chamber (111a), a low-pressure chamber (111b), and an alternating chamber (111c) that are connected sequentially along the axial direction. The liquid outlet channel (113) is connected to the high pressure chamber (111a), the liquid inlet channel (112) is connected to the low pressure chamber (111b), and the alternating chamber (111c) is arranged opposite to the plunger (20) of the hydraulic end. The first limiting part (111d) is located in the communication area between the low-pressure cavity (111b) and the alternating cavity (111c).

3. The valve chest of claim 2, wherein, The first limiting part (111d) includes a first limiting annular surface (111d2); The first limiting annular surface (111d2) is located in the low-pressure chamber (111b) on the side near the alternating chamber (111c). The first limiting annular surface (111d2) is used to abut against the end face of the valve seat (30) to limit the valve seat (30) in the axial direction.

4. The valve chest of claim 3, wherein, The inner wall of the low-pressure chamber (111b) is provided with a first sealing ring surface (111d1) that is arranged around the valve box (10) in the circumference. The first sealing ring surface (111d1) is located on the side of the first limiting ring surface (111d2) that is away from the alternating chamber (111c) and is used to limit the valve seat (30) in the radial direction.

5. The valve chest according to any one of claims 1 to 3, characterized in that The projection of the first limiting part (111d) in the first plane is a straight line or a curve, wherein the curve includes an arc or a broken line, and the first plane is parallel to the direction of the axis.

6. A valve chest characterized by, include: Valve box body (11); The valve box body (11) is provided with a main channel (111), an inlet channel (112) and an outlet channel (113). The main channel (111) extends along the axial direction of the valve box (10) and passes through both ends of the valve box body (11) to accommodate the valve seat (30) and valve assembly of the hydraulic end. The inlet channel (112) and the outlet channel (113) are respectively connected to the main channel (111). The inner wall of the main channel (111) is provided with a second limiting part (111e) arranged around the valve box (10) in the circumferential direction. Along the axial direction, the second limiting part (111e) is located on the side of the liquid inlet channel (112) opposite to the liquid outlet channel (113) and is used to limit the suction valve assembly (40).

7. The valve chest of claim 6, wherein, The main channel (111) includes a high-pressure chamber (111a), a low-pressure chamber (111b), and an alternating chamber (111c) arranged sequentially along the axial direction. The liquid outlet channel (113) is connected to the high pressure chamber (111a), the liquid inlet channel (112) is connected to the low pressure chamber (111b), and the alternating chamber (111c) is arranged opposite to the plunger (20) of the hydraulic end. The second limiting part (111e) is located on the inner wall of the alternating cavity (111c).

8. The valve chest of claim 7, wherein, The alternating cavity (111c) includes a first cavity segment (111c1) and a second cavity segment (111c2) connected sequentially along the axial direction. The first cavity segment (111c1) is connected to the low-pressure cavity (111b), and the second cavity segment (111c2) is arranged opposite to the plunger (20). The cross-sectional area of ​​the first cavity segment (111c1) is larger than the cross-sectional area of ​​the second cavity segment (111c2) so that the second limiting part (111e) is formed on the inner wall at the junction of the first cavity segment (111c1) and the second cavity segment (111c2).

9. The valve chest of claim 8, wherein, The projection of the second limiting part (111e) in the first plane is a straight line or a curve, wherein the curve includes an arc or a broken line, and the first plane is parallel to the direction of the axis.

10. A fluid end characterized by, Includes the valve box (10) as described in any one of claims 1 to 9.

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

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