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. A valve housing includes: a plurality of valve housing modules; the valve box modules are arranged in the first direction. Each valve box module is provided with a main channel, a liquid inlet channel and a liquid drainage channel, the main channel extends in the second direction and is used for containing a valve seat, a valve assembly and a plunger of the fluid end in the second direction, the liquid drainage channel extends in the third direction, and the main channel communicates with the liquid drainage channel and the liquid inlet channel. The problems that an integral valve box is large in maintenance or replacement difficulty, high in cost and the like 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, some hydraulic ends adopt an integral valve box structure, and intersection lines are formed between the valve cavity and the liquid inlet and outlet channels respectively. Stress concentration is prone to occur at the intersection line, causing the valve box to easily crack at the intersection line, thereby reducing the service life of the valve box; in addition, as the hydraulic end operates for a long time, the high-pressure fracturing liquid will cause erosion at the intersection line of the valve box, thereby requiring the valve box to be repaired or replaced.

[0003] However, due to the use of an integral valve box, the entire valve box needs to be repaired or replaced, which not only increases the difficulty of repair or replacement, but also increases the cost. Summary of the Invention

[0004] 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 problems of difficulty and high cost in repairing or replacing the integral valve box.

[0005] In order to solve the above technical problems, this application is implemented as follows: An embodiment of the present application provides a valve box, comprising: a plurality of valve box modules; The plurality of valve box modules are arranged along a first direction; Each valve box module is provided with a main channel, a liquid inlet channel and a liquid discharge channel. The main channel extends along the second direction and is used to accommodate the valve seat, valve assembly and plunger of the hydraulic end in the second direction. The liquid discharge channel extends along the third direction. The main channel is connected to the liquid discharge channel and the liquid inlet channel respectively.

[0006] The embodiment of the present application further provides a hydraulic end, comprising a manifold and the above-mentioned valve box; The manifold block is provided with a manifold channel, and the drainage channels of the plurality of valve box modules are respectively communicated with the manifold channel.

[0007] An embodiment of the present application also provides a pump comprising the above-mentioned hydraulic end.

[0008] The valve box in the embodiment of the present application adopts a combination of multiple valve box modules, replacing the integral valve box in the related art. In this way, when a local area of the valve box is damaged, the valve box module can be repaired or replaced separately without repairing or replacing the entire valve box, thereby reducing the difficulty and cost of repair or replacement; in addition, each valve box module is separately provided with a main channel, a liquid inlet channel and a liquid discharge channel, so that during the reciprocating motion of the plunger, the fluid can flow into the main channel through the liquid inlet channel and be pressurized in the main channel, and the pressurized fluid is discharged through the liquid discharge channel; further, the liquid discharge channel extends along a third direction so that the fluid can be discharged along the third direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a cross-sectional schematic diagram of the valve box disclosed in the embodiment of the present application; Figure 2 This is a schematic transverse cross-sectional view of the first form of the hydraulic end disclosed in the embodiment of the present application; Figure 3 This is a schematic longitudinal cross-sectional view of the first form of the hydraulic end disclosed in the embodiment of the present application; Figure 4 A schematic cross-sectional view of a current collecting block disclosed in an embodiment of the present application; Figure 5 This is a schematic transverse cross-sectional view of the second form of the hydraulic end disclosed in the embodiment of the present application; Figure 6 This is a schematic transverse cross-sectional view of the third type of hydraulic end disclosed in the embodiments of this application; Figure 7 for Figure 5 Schematic diagram of the cross section along AA or Figure 6 Schematic cross-section along the middle line BB.

[0010] Description of reference numerals: 10-valve box; 10a-valve box module; 11-main channel; 11a-high pressure chamber; 11b-low pressure chamber; 11c-alternating chamber; 12- drainage channel; 13-liquid inlet channel; 20-current collecting block; 21-collecting channel; 211-drain port; 22-diverting channel; 30-bushing; 40-fastener; 50-seal. DETAILED DESCRIPTION

[0011] 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.

[0012] 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.

[0013] The embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0014] refer to Figures 1 to 7 The present application discloses a valve box 10. The valve box 10 includes a plurality of valve box modules 10a arranged along a first direction. Each valve box module 10a is provided with a main channel 11, a liquid inlet channel 13, and a liquid discharge channel 12. The main channel 11 extends along a second direction and is used to accommodate components such as a valve seat, a valve assembly, and a plunger of a hydraulic end in the second direction. The liquid discharge channel 12 extends along a third direction and is in communication with the liquid inlet channel 13 and the liquid discharge channel 12, respectively.

[0015] Based on the above-mentioned arrangement, the valve box 10 in the embodiment of the present application adopts a combination of multiple valve box modules 10a to replace the integral valve box 10 in the related art. In this way, when a local area of the valve box 10 is damaged, the valve box module 10a can be repaired or replaced separately without repairing or replacing the entire valve box 10, thereby reducing the difficulty and cost of repair or replacement. In addition, each valve box module 10a is separately provided with a main channel 11, a liquid inlet channel 13 and a liquid discharge channel 12, so that during the reciprocating motion of the plunger, the fluid can flow into the main channel 11 through the liquid inlet channel 13 and be pressurized in the main channel 11, and the pressurized fluid is discharged through the liquid discharge channel 12. Furthermore, the liquid discharge channel 12 extends along a third direction so that the fluid can be discharged along the third direction.

[0016] Optionally, the main channel 11 can be used to accommodate components such as the plunger, valve seat, liquid inlet valve assembly, liquid outlet valve assembly, etc., so that the fluid can be periodically sucked in, pressurized and discharged during the reciprocating movement of the plunger.

[0017] Optionally, the first, second, and third directions may be perpendicular to each other, for example, the first direction is the front-to-back direction, the second direction is the left-to-right direction, and the third direction is the up-to-down direction. In this case, liquid can be discharged in the up-to-down direction. Of course, the first, second, and third directions are not perpendicular to each other. For example, the first direction is the front-to-back direction, the second direction is the left-to-right direction, and the third direction is parallel to the first direction. In this case, liquid can be discharged from the side. In addition, the first, second, and third directions may also be distributed in other ways, which are not specifically limited here.

[0018] refer to Figure 1 In some embodiments, the main channel 11 may include a high-pressure chamber 11a, a low-pressure chamber 11b and an alternating chamber 11c that are sequentially connected along the second direction, wherein the alternating chamber 11c is used to move in or out of the plunger so that the plunger can move back and forth relative to the valve box 10; the low-pressure chamber 11b is a fluid suction chamber, and during the process of the plunger moving out relative to the alternating chamber 11c, the external fluid can be sucked into the low-pressure chamber 11b, and the fluid in the low-pressure chamber 11b can flow into the alternating chamber 11c and be pressurized by the movement of the plunger; the high-pressure chamber 11a is a fluid discharge chamber, and the fluid pressurized by the plunger can flow into the high-pressure chamber 11a via the alternating chamber 11c, and finally be discharged through the high-pressure chamber 11a.

[0019] In addition, the liquid inlet channel 13 is connected to the low-pressure chamber 11b, so that the fluid is transported to the low-pressure chamber 11b through the liquid inlet channel 13 to achieve the suction of the fluid; the liquid discharge channel 12 is connected to the high-pressure chamber 11a, and the pressurized fluid in the high-pressure chamber 11a can be discharged to the outside of the valve box 10 through the liquid discharge channel 12.

[0020] Furthermore, along the second direction, the liquid inlet channel 13 is located on the side of the liquid discharge channel 12 close to the alternating chamber 11c, so that it can adapt to the arrangement of the low-pressure chamber 11b and the high-pressure chamber 11a, thereby making the suction and discharge of the fluid smoother.

[0021] In some embodiments, the extension direction of the liquid inlet channel 13 deviates from the third direction, that is, the extension direction of the liquid inlet channel 13 and the third direction can form a certain angle, so that the liquid inlet channel 13 can extend obliquely, thereby realizing the oblique inflow of the fluid, changing the flow direction of the fluid into the low-pressure chamber 11b, and to a certain extent reducing the inflow resistance of the fluid and promoting the smoothness of the fluid flow.

[0022] Optionally, the angle between the extension direction of the liquid inlet channel 13 and the third direction can range from 30° to 75°, including, for example, 30°, 45°, 60°, 75°, etc. Of course, it can also be other degrees, which is not specifically limited here.

[0023] Furthermore, the liquid inlet channel 13 extends along the third direction and obliquely toward the side close to the alternating chamber 11 c. Based on this, since the liquid discharge channel 12 is located on the side of the liquid inlet channel 13 away from the alternating chamber 11 c, the liquid inlet channel 13 can have a tendency to deviate from the liquid discharge channel 12, thereby increasing the setting space between the liquid inlet channel 13 and the liquid discharge channel 12 to prevent mutual interference between the liquid inlet channel 13 and the liquid discharge channel 12.

[0024] It should be noted here that the third direction can be in the vertical plane, the horizontal plane, or other planes, and can be set according to actual needs.

[0025] In some embodiments, each valve box module 10a may include a valve box portion and a packing box portion. The valve box portion and the packing box portion may be integrally provided, such as Figure 7 As shown, or a split setting is used, such as Figure 2 shown.

[0026] When an integrated setting is adopted, the sealing of the entire valve box 10 can be guaranteed, and it is beneficial to improve the strength of the entire valve box 10; when a split setting is adopted, when a part is damaged, the damaged part can be repaired or replaced separately without the need for overall repair or replacement, reducing complexity and cost.

[0027] Based on the above-mentioned valve box 10 , the embodiment of the present application further discloses a hydraulic end, which includes a manifold 20 and the above-mentioned valve box 10 .

[0028] Among them, the collecting block 20 can be provided with a collecting channel 21, and the drainage channels 12 of multiple valve box modules 10a are respectively connected to the collecting channel 21. In this way, the pressurized fluid flows into the collecting channel 21 through the drainage channel 12 of each valve box module 10a, so that the collected fluid is discharged to the outside through the collecting channel 21.

[0029] Optionally, the collecting channel 21 extends along the first direction and is provided with a drain port 211 at at least one end in the first direction, so that the pressurized fluid can be discharged through the drain port 211 at at least one end of the collecting channel 21 along the first direction.

[0030] For example, a drain terminal and other components may be provided at the drain port 211, and the drain terminal may be connected to the end of the manifold 20 by means of a flange, so that the manifold 20 can be connected to other drain pipes through the drain terminal, thereby delivering the pressurized fluid to the desired location.

[0031] refer to Figure 3 In some embodiments, the collecting block 20 may also be provided with a plurality of diverter channels 22, which are arranged along the first direction, and each diverter channel 22 is connected to the corresponding drainage channel 12 and the collecting channel 21, so that one end of each of the plurality of diverter channels 22 is respectively connected to the collecting channel 21, and the other end of each of the plurality of diverter channels 22 is respectively connected to the corresponding drainage channel 12 of the plurality of valve box modules 10a.

[0032] Based on the above arrangement, the pressurized fluids (such as fracturing fluids, etc.) discharged from the multiple valve box modules 10a can be respectively received through the multiple diversion channels 22, and the fluids received by each of them can be transported to the collecting channel 21 through the multiple diversion channels 22, so as to collect the fluids through the collecting channel 21 and discharge the collected fluids. In this way, the collecting block 20 can withstand the pressure and erosion of the fluid.

[0033] Compared with the method in the related art in which the inner wall of the channel of the valve box 10 is subjected to fluid pressure and erosion, the embodiment of the present application can change the object of fluid fracturing and erosion, and can repair or replace the collecting block 20 separately when it is eroded or broken down, thereby eliminating the need to repair or replace the entire valve box 10, thereby reducing the difficulty of repair or replacement and reducing the cost of repair or replacement.

[0034] refer to Figure 3 In some embodiments, the hydraulic end may further include a plurality of bushings 30 , each bushing 30 being disposed at the junction of the corresponding drainage channel 12 and the diversion channel 22 , and the inner cavity of the bushing 30 being connected to the drainage channel 12 and the diversion channel 22 .

[0035] Based on the above arrangement, a stable connection between the valve box 10 and the manifold block 20 can be achieved through multiple bushings 30. In addition, the bushings 30 can also shield and seal the joints between the corresponding drainage channels 12 and the diversion channels 22, thereby effectively preventing the fracturing liquid from impacting the joints, thereby effectively alleviating problems such as erosion and leakage at the joints between the corresponding drainage channels 12 and the diversion channels 22.

[0036] Furthermore, the corresponding drainage channel 12 and the diversion channel 22 can each be provided with a mounting groove on the inner wall near the docking point, and the two ends of the bushing 30 are respectively embedded in the mounting groove of the corresponding drainage channel 12 and the mounting groove of the diversion channel 22, and the cavity wall of the inner cavity of the bushing 30 and the inner wall of the corresponding drainage channel 12, that is, the inner wall of the diversion channel 22, are smoothly transitioned.

[0037] Based on the above arrangement, the end of the bushing 30 can be accommodated by the mounting groove, thereby effectively preventing the bushing 30 from occupying the space within the drainage channel 12 and the diverter channel 22. This prevents the cross-sectional area of the drainage channel 12 and the diverter channel 22 from being reduced in the area where the bushing 30 is provided, ensuring that the fluid flows at the maximum flow rate in the drainage channel 12 and the diverter channel 22, and improving the smoothness of the fluid flow. In addition, the bushing 30 ensures a stable and reliable connection between the corresponding drainage channel 12 and the diverter channel 22, and helps to improve the sealing performance of the connection between the manifold block 20 and the valve box 10.

[0038] Continue to refer Figure 3 In some embodiments, the hydraulic end may further include a seal 50, which is sealed between the bushing 30 and the drainage channel 12, and between the bushing 30 and the diverter channel 22. The seal 50 can effectively alleviate the problem of fluid leakage caused by poor sealing between the bushing 30 and the drainage channel 12, and between the bushing 30 and the diverter channel 22.

[0039] Optionally, at least one of the bottom wall of the mounting groove and the outer wall of the bushing 30 is provided with an annular groove extending circumferentially, and at least part of the seal 50 is provided in the annular groove, thereby achieving good sealing between the outer wall of the bushing 30 and the bottom wall of the mounting groove.

[0040] In some embodiments, the hydraulic end may further include a plurality of fasteners 40 , which fasten the manifold block 20 and the valve box 10 .

[0041] Optionally, the collecting block 20 can be provided with a plurality of first mounting holes, and correspondingly, the valve box 10 can be provided with a plurality of second mounting holes. When installing the collecting block 20, the collecting block 20 is hoisted onto the valve box 10, and the first mounting holes are aligned with the second mounting holes, and the fasteners 40 are passed through the aligned first mounting holes and the second mounting holes, thereby achieving a secure installation of the collecting block 20 and ensuring the installation stability of the collecting block 20.

[0042] For example, the first mounting hole may be a smooth hole, the second mounting hole may be a threaded hole, and the fastener 40 may be a bolt or a screw.

[0043] In other embodiments, the hydraulic end may further include a plurality of fasteners 40 and a plurality of clamps, wherein the plurality of clamps are respectively sleeved on the outside of the manifold 20 , and the plurality of fasteners 40 respectively fix the plurality of clamps to the valve box 10 .

[0044] Optionally, a plurality of clamps may be arranged at intervals along the first direction to clamp different positions of the manifold block 20 , thereby making the force applied to various parts of the manifold block 20 more balanced and improving the installation stability of the manifold block 20 .

[0045] In addition, each clamp can be provided with a third mounting hole, and the valve box 10 can be provided with a second mounting hole. When installing the manifold 20, the manifold 20 is hoisted onto the valve box 10, and multiple clamps are respectively arranged on the outside of the manifold 20 along the first direction, and the third mounting hole is aligned with the second mounting hole, and the fastener 40 is passed through the aligned third mounting hole and the second mounting hole, so as to achieve the fastening installation of each clamp, and the manifold 20 is clamped by multiple clamps to ensure the installation stability of the manifold 20.

[0046] 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.

[0047] 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: A plurality of valve box modules (10a); A plurality of the valve box modules (10a) are arranged along a first direction; Each valve box module (10a) is provided with a main channel (11), a liquid inlet channel (13) and a liquid discharge channel (12); the main channel (11) extends along a second direction and is used to accommodate a valve seat, a valve assembly and a plunger of a hydraulic end in the second direction; the liquid discharge channel (12) extends along a third direction; the main channel (11) is communicated with the liquid discharge channel (12) and the liquid inlet channel (13) respectively.

2. The valve box according to claim 1, characterized in that: The main channel (11) comprises a high-pressure chamber (11a), a low-pressure chamber (11b), and an alternating chamber (11c) that are sequentially connected along the second direction; The drainage channel (12) is in communication with the high-pressure chamber (11a); Along the second direction, the liquid inlet channel (13) is located on a side of the liquid discharge channel (12) close to the alternating chamber (11c), and the liquid inlet channel (13) is in communication with the low-pressure chamber (11b); The alternating chamber (11c) is used to move the plunger in or out.

3. The valve box according to claim 2, characterized in that: The extension direction of the liquid inlet channel (13) deviates from the third direction.

4. The valve box according to claim 3, characterized in that: The liquid inlet channel (13) extends along the third direction and obliquely toward a side close to the alternating chamber (11c).

5. The valve box according to claim 1, characterized in that: Each valve box module (10a) comprises a valve box portion and a packing box portion, and the valve box portion and the packing box portion are arranged integrally or separately.

6. A hydraulic end, characterized in that: include: A manifold (20) and a valve box (10) according to any one of claims 1 to 5; The manifold block (20) is provided with a manifold channel (21), and the drainage channels (12) of the plurality of valve box modules (10a) are respectively in communication with the manifold channel (21).

7. The hydraulic end according to claim 6, characterized in that: The collecting channel (21) extends along the first direction, and is provided with a liquid discharge port (211) at at least one end in the first direction.

8. The fluid end according to claim 6, characterized in that: The manifold block (20) is further provided with a plurality of diversion channels (22), and the plurality of diversion channels (22) are arranged along the first direction; Each of the flow-dividing channels (22) is connected to the corresponding drainage channel (12) and the flow-collecting channel (21).

9. The fluid end according to claim 8, characterized in that: The hydraulic end further comprises a plurality of bushings (30), each bushing (30) being arranged at a joint between a corresponding drainage channel (12) and a diversion channel (22), and an inner cavity of the bushing (30) being in communication with the drainage channel (12) and the diversion channel (22).

10. The fluid end according to claim 9, characterized in that: The hydraulic end further comprises a sealing member (50), wherein the sealing member (50) is respectively sealed between the bushing (30) and the drainage channel (12), and between the bushing (30) and the diversion channel (22).

11. The fluid end according to claim 6, characterized in that: The hydraulic end further comprises a plurality of fasteners (40), wherein the plurality of fasteners (40) fasten and connect the manifold block (20) and the valve box (10).

12. A pump, characterized in that: The liquid end comprises the liquid end according to any one of claims 6 to 11.

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