Valve box and pump

Abstract

The utility model discloses a valve box and a pump, and relates to the fields of oil gas, mines and the like. A valve box is provided with a plurality of main channels and at least one first liquid drainage channel, the main channels are arranged in the first direction, each main channel extends in the second direction and is used for containing a valve seat and a valve assembly of a fluid end, and each first liquid drainage channel extends in the first direction and communicates with the main channels. And the plurality of main channels are used for discharging the pressurized liquid in the plurality of main channels outwards. The problems of fatigue failure and the like of the intersecting line area in the valve box can be solved.

Description

Technical Field

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

[0002] In some related technologies, the hydraulic end of a plunger pump has a valve box with a plunger chamber, a suction chamber, and a discharge chamber. The suction chamber and the discharge chamber are arranged in the vertical direction, while the plunger chamber is arranged in the horizontal direction. This makes the direction of the plunger chamber perpendicular to the direction of the suction chamber and the discharge chamber, thus forming an intersection line at the intersection.

[0003] Because the shape of the intersection area is discontinuous and the pressure of the fluid in the valve box changes periodically, the intersection area is prone to fatigue failure, and may even crack, affecting the service life of the valve box. Utility Model Content

[0004] The purpose of this application is to provide a valve box and pump that can solve problems such as fatigue failure in the intersecting line area within the valve box.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] This application provides a valve box, which has multiple main channels and at least one first drain channel. The multiple main channels are arranged along a first direction, and each main channel extends along a second direction to accommodate a valve seat and a valve assembly at the hydraulic end. Each first drain channel extends along the first direction and is connected to the multiple main channels respectively to discharge pressurized liquid in the multiple main channels to the outside.

[0007] This application also provides a pump, including the valve box described above.

[0008] In this embodiment, the valve box has multiple main channels, each of which can accommodate the valve assembly and the plunger. Each main channel extends along a second direction, allowing the plunger cavity and valve cavity of the valve box to be located in the same direction. Compared to the method in related technologies where the valve cavity and plunger cavity form an intersection line at a 90° angle, the valve box in this embodiment does not have an intersection line between the valve box and the plunger cavity. This effectively mitigates the erosion of the intersection line area by the fluid during operation, which is beneficial for improving the service life of the valve box. Furthermore, it also helps to reduce the height of the valve box, making the valve box design more compact and reducing costs and weight. In addition, by providing at least one first drainage channel in the valve box, the fluid in the multiple main channels can be discharged separately. Compared to the method in related technologies where drainage modules are installed separately on the outer wall of the valve box, this embodiment allows for a more compact structure and is less prone to leakage after long-term operation, thus extending the operating cycle of the fracturing equipment. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the valve box structure disclosed in the embodiments of this application;

[0010] Figure 2 This is a cross-sectional view of the valve box disclosed in the embodiments of this application along the transverse direction;

[0011] Figure 3 This is a longitudinal cross-sectional view of the valve box of the first type disclosed in the embodiments of this application;

[0012] Figure 4 This is a longitudinal cross-sectional view of the valve box of the second type disclosed in the embodiments of this application;

[0013] Figure 5 This is a longitudinal cross-sectional view of the third type of valve box disclosed in the embodiments of this application;

[0014] Figure 6 This is a schematic diagram of the structure of the first type of discharge flange disclosed in the embodiments of this application;

[0015] Figure 7 This is a schematic diagram of the structure of the second type of discharge flange disclosed in the embodiments of this application;

[0016] Figure 8 This is a cross-sectional schematic diagram of the discharge flange disclosed in an embodiment of this application;

[0017] Figure 9 This is a schematic diagram of the hydraulic end structure disclosed in the embodiments of this application;

[0018] Figure 10 This is a cross-sectional schematic diagram of the first type of hydraulic end disclosed in the embodiments of this application;

[0019] Figure 11 This is a cross-sectional schematic diagram of the second type of hydraulic end disclosed in the embodiments of this application;

[0020] Figure 12 This is a cross-sectional schematic diagram of the valve box, discharge flange, and seals disclosed in the embodiments of this application, using the first configuration form;

[0021] Figure 13 This is a cross-sectional schematic diagram of the valve box, discharge flange, and seals disclosed in the embodiments of this application, which adopt the second configuration.

[0022] Figure 14 This is a cross-sectional schematic diagram showing the valve box, discharge flange, and seals of the embodiments disclosed in this application using a third configuration.

[0023] Explanation of reference numerals in the attached figures:

[0024] 10-Valve box; 10a-Valve box module; 11-Main channel; 11a-High pressure chamber; 11b-Low pressure chamber; 11c-Alternating chamber; 12-First drain channel; 121-First channel unit; 13-Connecting channel; 14-Groove; 15-Inlet channel; 16-Fasting hole;

[0025] 20-Discharge flange; 20a-Flange section; 20b-Connection section; 20c-Manifold section; 20d-Boss; 21-Second drain channel; 211-Second channel unit; 212-Third channel unit;

[0026] 30 - Seals;

[0027] 40-plunger;

[0028] 50-packing box assembly. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] The embodiments of this application will be described in detail below with reference to the accompanying drawings and specific examples and application scenarios.

[0032] refer to Figures 1 to 14 This application discloses a valve box 10, which is applied to the hydraulic end of a pump. The disclosed valve box 10 is provided with multiple main channels 11 and at least one first drain channel 12. The main channels 11 are used to accommodate components such as valve assemblies and plungers 40, and the first drain channel 12 is used to discharge fluids, such as fracturing fluid.

[0033] Multiple main channels 11 are arranged along a first direction, and each main channel 11 extends along a second direction. The first direction and the second direction can be set at an angle. For example, the first direction and the second direction can be perpendicular. Of course, they can also be at other angles other than 90°, which are not specifically limited here.

[0034] Optionally, such as Figure 2 As shown, the main channel 11 may include a high-pressure chamber 11a, a low-pressure chamber 11b, and an alternating chamber 11c; correspondingly, the valve assembly may include components such as a valve seat and a valve assembly. The valve assembly can be further divided into a suction valve assembly and a discharge valve assembly. The suction valve assembly can be disposed in the low-pressure chamber 11b, the discharge valve assembly can be disposed in the high-pressure chamber 11a, and the plunger 40 is movably disposed in the alternating chamber 11c. Additionally, as... Figure 9 As shown, a packing box assembly 50 may be provided on the side of the valve box 10, and the plunger 40 is movably inserted through the packing box assembly 50 so that the packing box assembly 50 can play a certain guiding and sealing role for the plunger 40.

[0035] Based on the above configuration, during the reciprocating movement of the plunger 40, fluid can be drawn into the low-pressure chamber 11b and pressurized in the alternating chamber 11c. The pressurized fluid then enters the high-pressure chamber 11a and is discharged through the first discharge channel 12. Of course, during this process, the periodic opening or closing of the suction valve assembly and the discharge valve assembly is required to achieve the suction, pressurization, and discharge of the fluid.

[0036] Each first drainage channel 12 can extend along a first direction and connect to multiple main channels 11 respectively, for discharging the pressurized fluid in the multiple main channels 11 outward. Based on this, the pressurized fluid in the multiple main channels 11 can be collected through the first drainage channel 12 and then discharged together.

[0037] In this embodiment, the valve box 10 is provided with multiple main channels 11. Each main channel 11 can be used to accommodate the valve assembly (including valve seat, valve assembly, etc.) and the plunger 40. Each main channel 11 extends along the second direction, so that the main channels 11 of the valve box 10 are all located in the same direction. Compared with the method in the related art where the valve cavity and the plunger cavity form an intersection line at a 90° angle, the valve box 10 in this embodiment does not have an intersection line, which can effectively alleviate the erosion of the intersection line area by the fluid during operation, which is beneficial to improving the service life of the valve box 10. In addition, it can also help to reduce the height of the valve box 10, making the valve box 10 more compact, and helping to reduce costs and weight.

[0038] In addition, by providing at least one first drainage channel 12 in the valve box 10, the fluid in the multiple main channels 11 can be discharged separately. Compared with the method of installing drainage modules separately on the outer wall of the valve box 10 in the related technology, the embodiment of this application can make the structure more compact and less prone to leakage after long-term operation, which is beneficial to extending the operating cycle of the fracturing equipment.

[0039] refer to Figure 3 In some embodiments, the valve box 10 may include a valve box module 10a, which may have multiple main channels 11 and a first drainage channel 12 located in the valve box module 10a. This configuration allows the entire valve box 10 to be a single integrated structure, which improves the overall strength of the valve box 10 and shortens its manufacturing cycle.

[0040] refer to Figure 4 and Figure 5 In other embodiments, the valve box 10 may include a plurality of valve box modules 10a arranged sequentially along a first direction. Each valve box module 10a may be provided with at least one main channel 11 and each valve box module 10a may be provided with a first channel unit 121. The first channel unit 121 is connected to at least one main channel 11 provided on the corresponding valve box module 10a, and the first channel units 121 of the plurality of valve box modules 10a are connected sequentially to form a first drainage channel 12.

[0041] Based on the above configuration, the valve box 10 can be divided into multiple valve box modules 10a. Each valve box module 10a has an individual function, capable of satisfying the reciprocating movement of the plunger 40 and the intake, pressurization, and discharge of fluid. After arranging the multiple valve box modules 10a along the first direction, the first channel units 121 of each can be connected sequentially to form a first discharge channel 12, so as to collect the pressurized fluid from the multiple valve box modules 10a together and discharge it uniformly.

[0042] Compared to the integrated valve box 10 mentioned above, the split valve box 10 allows for individual repair or replacement of each valve box module 10a when it is damaged, without the need to repair or replace the entire valve box 10. This reduces the difficulty and cost of repair or replacement, and can improve the overall service life of the valve box 10 while meeting operational requirements.

[0043] refer to Figure 1 and Figure 2In some embodiments, the valve box 10 may be provided with two first drainage channels 12, which are distributed along a third direction on both sides of each main channel 11 and are respectively connected to each main channel 11. Based on this, the pressurized fluid in each main channel 11 can be discharged through the two first drainage channels 12, thereby increasing the fluid flow area while making full use of the external dimensions of the valve box 10, which is beneficial to improving the fluid discharge efficiency.

[0044] The first direction, the second direction, and the third direction can be perpendicular to each other. For example, the first direction can be left-right, the second direction can be front-back, and the third direction can be up-down. Of course, other forms are also possible, which are not specifically limited here.

[0045] In other embodiments, the valve box 10 may also be provided with other numbers of first drainage channels 12, such as three, four, five, etc.; in addition, the multiple first drainage channels 12 may also adopt other arrangement forms, such as uniform distribution, non-uniform distribution, etc.

[0046] refer to Figure 11 In some embodiments, the valve box 10 may also be provided with a plurality of connecting channels 13 arranged along a first direction, each connecting channel 13 connecting a corresponding main channel 11 and a first drain channel 12. Based on this, the pressurized fluid in the corresponding main channel 11 can be transported to the first drain channel 12 through the connecting channel 13, and the fluid discharged from the plurality of main channels 11 can be collected through the first drain channel 12 for centralized discharge.

[0047] Optionally, when there is one first drainage channel 12, the valve box 10 may be provided with a set of multiple connecting channels 13 arranged along the first direction; when there are at least two first drainage channels 12, the valve box 10 may be provided with at least two sets of multiple connecting channels 13 arranged along the first direction, and each set of connecting channels 13 connects multiple main channels 11 to the corresponding first drainage channel 12.

[0048] In some more specific embodiments, there are two first drainage channels 12, which are respectively located on both sides of the main channel 11 along a third direction; correspondingly, two sets of connecting channels 13 can be provided, with the two sets of connecting channels 13 located on both sides of the main channel 11 along a third direction, so as to realize the separate connection between each main channel 11 and the two first drainage channels 12.

[0049] 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 a second direction. The alternating chamber 11c is configured to be opposite to the plunger 40 at the hydraulic end, and each first drain channel 12 is connected to the high-pressure chamber 11a.

[0050] Furthermore, the side wall of the valve box 10 may be provided with multiple liquid inlet channels 15, each liquid inlet channel 15 extending toward the main channel 11 and communicating with the low-pressure chamber 11b.

[0051] Based on the above configuration, during the reciprocating movement of the plunger 40, fluid can be input into the low-pressure chamber 11b through multiple inlet channels 15. The fluid can flow into the alternating chamber 11c through the low-pressure chamber 11b and be pressurized by the plunger 40. The pressurized fluid can flow into the high-pressure chamber 11a through the alternating chamber 11c and finally be discharged through the first drain channel 12.

[0052] Optionally, the liquid inlet channel 15 is distributed on at least one side wall of the valve box 10 along a third direction. Optionally, the liquid inlet channel 15 can be located at the top of the valve box 10 or at the side of the valve box 10, and the position of the liquid inlet channel 15 can be set according to the liquid inlet requirements.

[0053] In some embodiments, at least one end face of the valve box 10 along the first direction may be provided with a fastening hole 16, through which fasteners can be installed to install an end head (e.g., the discharge flange 20 described below) at the end of the valve box 10.

[0054] This application also discloses a discharge flange 20 for connection with the valve box 10 described above. The disclosed discharge flange 20 is provided with a second drainage channel 21, which communicates with at least one first drainage channel 12. Thus, the fluid collected in at least one first drainage channel 12 can be discharged to the outside of the valve box 10 through the second drainage channel 21.

[0055] It should be noted that the number of second drainage channels 21 can be the same as the number of first drainage channels 12 in the valve box 10, so as to facilitate one-to-one connection. For example, when the valve box 10 has one first drainage channel 12, the discharge flange 20 can have one second drainage channel 21; when the valve box 10 has at least two first drainage channels 12, the discharge flange 20 can have at least two second drainage channels 21. Of course, the number of second drainage channels 21 can also be different from the number of first drainage channels 12 in the valve box 10. For example, the valve box 10 may have multiple first drainage channels 12, and the discharge flange 20 may have one second drainage channel 21. In this case, multiple first drainage channels 12 can all be connected to one second drainage channel 21.

[0056] Optionally, the discharge flange 20 is detachably connected to the side of the valve box 10 so that the second drain passage 21 mates with at least one first drain passage 12. For example, the discharge flange 20 is installed to the side of the valve box 10 using fasteners such as bolts.

[0057] refer to Figures 5 to 8In some embodiments, the second drainage channel 21 may include at least one second channel unit 211 and a third channel unit 212. One end of the at least one second channel unit 211 is connected to the third channel unit 212, and the other end of the at least one second channel unit 211 is correspondingly connected to at least one first drainage channel 12.

[0058] Based on the above configuration, fluid can be received from at least one first drain channel 12 through at least one second channel unit 211, and then transported to the third channel unit 212, and finally discharged through the third channel unit 212.

[0059] It should be noted that the number of second channel units 211 is equal to the number of first drainage channels 12, and they are connected one by one; the function of the third channel unit 212 is to collect the fluid discharged from at least one second channel unit 211 for centralized discharge.

[0060] refer to Figures 6 to 8 In some embodiments, the discharge flange 20 may include a flange portion 20a, a connecting portion 20b, and a collection portion 20c arranged sequentially. The flange portion 20a is used to connect to the valve box 10, at least one second channel unit 211 is disposed between the flange portion 20a and the connecting portion 20b, and a third channel unit 212 is disposed between the collection portion 20c. Specifically, at least one second channel unit 211 can penetrate through the flange portion 20a and the connecting portion 20b, and the third channel unit 212 can penetrate through the collection portion 20c.

[0061] Optionally, the flange 20a can be installed to the side of the valve box 10 by fasteners, and the connecting part 20b serves to connect the flange 20a and the manifold 20c so as to achieve a structural transition between the flange 20a and the manifold 20c.

[0062] For example, the flange 20a, the connecting part 20b, and the manifold 20c can be an integral structure, that is, the entire discharge flange 20 is an integral structure; of course, the flange 20a, the connecting part 20b, and the manifold 20c can also be fixedly connected in sequence.

[0063] In some more specific embodiments, the valve box 10 may be provided with two first drain channels 12, and correspondingly, the discharge flange 20 may be provided with two second channel units 211. The two second channel units 211 are respectively connected to the two first drain channels 12, and the third channel unit 212 is connected to the two second channel units 211, so as to collect the fluid discharged from the two second channel units 211 and discharge the fluid together.

[0064] Based on the above-described valve box assembly, this application embodiment also discloses a valve box assembly, which includes the valve box 10 and the discharge flange 20. The discharge flange 20 is connected to at least one end of the valve box 10 along a first direction. Thus, the discharge flange 20 at at least one end can be connected to other pipelines to facilitate the discharge of the fracturing liquid in the valve box 10 from at least one end.

[0065] refer to Figure 7 , Figure 13 and Figure 14 In some embodiments, one of the sides of the discharge flange 20 facing the valve box 10 and the other of the side of the valve box 10 facing the discharge flange 20 may be provided with a boss 20d, and the other may be provided with a groove 14, with the boss 20d and the groove 14 engaging. Based on this, the connection area between the discharge flange 20 and the valve box 10 can be increased, and limiting in various directions perpendicular to the first direction can improve the reliability and stability of the connection between the discharge flange 20 and the valve box 10, and also improve the sealing performance at the connection.

[0066] Furthermore, a sealing element 30 may be provided between the valve box 10 and the discharge flange 20. The sealing element 30 is arranged around the periphery of the first drainage channel 12. In this way, the sealing element 30 can seal the connection between the valve box 10 and the discharge flange 20, effectively preventing the fluid in the first drainage channel 12 from leaking out from the connection between the valve box 10 and the discharge flange 20.

[0067] refer to Figure 12 In some embodiments, the seal 30 may be located between the side of the valve box 10 facing the discharge flange 20 and the side of the discharge flange 20 facing the valve box 10.

[0068] Optionally, the side of the valve box 10 facing the discharge flange 20 may be provided with a first annular groove, and the sealing element 30 may be partially embedded in the first annular groove and abut against the side of the discharge flange 20 facing the valve box 10; or, the side of the discharge flange 20 facing the valve box 10 may be provided with a second annular groove, and the sealing element 30 may be partially embedded in the second annular groove and abut against the side of the valve box 10 facing the discharge flange 20; or, the side of the valve box 10 facing the discharge flange 20 may be provided with a first annular groove, and the sealing element 30 may be partially embedded in the first annular groove, and the side of the discharge flange 20 facing the valve box 10 may be provided with a second annular groove, with a portion of the sealing element 30 embedded in the first annular groove and the other portion embedded in the second annular groove.

[0069] refer to Figure 13 and Figure 14 In other embodiments, the seal 30 may be disposed between the boss 20d and the groove 14.

[0070] Optionally, the seal 30 is located between the end face of the boss 20d and the bottom of the groove 14; or, the seal 30 is located between the outer wall of the boss 20d and the inner wall of the groove 14; or, the seal 30 is respectively located between the end face of the boss 20d and the bottom of the groove 14, and between the outer wall of the boss 20d and the inner wall of the groove 14.

[0071] For example, at least one of the outer wall of the boss 20d and the inner wall of the groove 14 may be provided with a third annular groove, and a portion of the seal 30 is embedded in the third annular groove of one and abuts against the other.

[0072] This application also discloses a pump, which includes the valve box assembly described above.

[0073] 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, The valve box (10) is provided with a plurality of main channels (11) and at least one first drain channel (12). The plurality of main channels (11) are arranged along a first direction, and each main channel (11) extends along a second direction to accommodate the valve seat and valve assembly of the hydraulic end. Each first drain channel (12) extends along the first direction and is connected to the plurality of main channels (11) respectively to discharge the pressurized liquid in the plurality of main channels (11) to the outside.

2. The valve chest of claim 1, wherein, The valve box (10) includes a valve box module (10a), the valve box module (10a) is provided with a plurality of main channels (11), and the first drain channel (12) is provided in the valve box module (10a).

3. The valve chest of claim 1, wherein, The valve box (10) includes a plurality of valve box modules (10a) arranged sequentially along the first direction. Each valve box module (10a) is provided with at least one main channel (11). Each valve box module (10a) is provided with a first channel unit (121). The first channel unit (121) is connected to at least one main channel (11), and the first channel units (121) of the plurality of valve box modules (10a) are connected sequentially to form the first drainage channel (12).

4. The valve chest of claim 1, wherein, The valve box (10) is provided with two first drainage channels (12), which are distributed along a third direction on both sides of each main channel (11) and are respectively connected to each main channel (11).

5. The valve chest according to any one of claims 1 to 4, characterized in that The valve box (10) is also provided with a plurality of connecting channels (13) arranged along the first direction, each of the connecting channels (13) connecting the corresponding main channel (11) and the first drain channel (12).

6. The valve chest according to any one of claims 1 to 4, characterized in that The main channel (11) includes a high-pressure chamber (11a), a low-pressure chamber (11b), and an alternating chamber (11c) that are connected sequentially along the second direction. The alternating chamber (11c) is arranged opposite to the plunger (40) of the hydraulic end, and each of the first drainage channels (12) is connected to the high-pressure chamber (11a).

7. The valve chest of claim 6, wherein, The valve box (10) has a plurality of liquid inlet channels (15) on its side wall. Each liquid inlet channel (15) extends toward the main channel (11) and is connected to the low-pressure chamber (11b).

8. The valve chest of claim 7, wherein, The liquid inlet channel (15) is distributed on at least one side wall of the valve box (10) along a third direction.

9. The valve chest of claim 1, wherein, The valve box (10) has a fastening hole (16) on at least one end face along the first direction.

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

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