Discharge flange, valve box assembly and pump

Abstract

The utility model discloses a discharge flange, a valve box assembly and a pump, and relates to the fields of oil gas, mines and the like. A discharge flange is used for being connected with a valve box of a fluid end in a matched mode, and the discharge flange is provided with at least two second channel units and at least two third channel units. One ends of the at least two second channel units are communicated with the third channel unit, and the other ends of the at least two second channel units are used for being correspondingly communicated with a first liquid discharging channel arranged on the valve box. The problems that disassembly and assembly of the discharge pipeline and the valve box are not changed, and the bearing load is large 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 discharge flange, valve box assembly and pump. Background Technology

[0002] In some related technologies, the hydraulic end of a plunger pump directly connects the discharge pipe to the end of the valve box to discharge the pressurized fracturing fluid from the valve box. However, the disassembly and assembly of the discharge pipe and the valve box is inconvenient, and the discharge pipe bears a large load from the fracturing fluid, making it prone to damage and causing fracturing fluid leakage. Utility Model Content

[0003] The purpose of this application is to provide a discharge flange, valve box assembly, and pump that can solve problems such as the inconsistency in disassembling and assembling the discharge pipeline and valve box, and the large load it can withstand.

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

[0005] This application provides a discharge flange for connecting with a valve box at a hydraulic end, wherein the discharge flange is provided with at least two second channel units and a third channel unit;

[0006] One end of each of the at least two second channel units is connected to the third channel unit, and the other end of each of the at least two second channel units is connected to the first drain channel provided in the valve box.

[0007] This application provides a valve box assembly, including: a valve box and the aforementioned discharge flange, wherein the discharge flange is connected to at least one end of the valve box along the first direction.

[0008] This application provides a pump that includes the valve box assembly described above.

[0009] In this embodiment, by setting a discharge flange and connecting the discharge flange to the valve box, the pressurized fracturing fluid in the valve box can be discharged through the discharge flange. It is not easily damaged when subjected to a large load from the fracturing fluid, and it ensures a stable connection with the valve box, effectively preventing fracturing fluid leakage. Furthermore, the discharge flange can connect the discharge pipe to the valve box, which can facilitate the disassembly and assembly of the discharge pipe and the valve box, and improve the disassembly and assembly efficiency. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the valve box structure disclosed in the embodiments of this application;

[0011] Figure 2 This is a cross-sectional view of the valve box disclosed in the embodiments of this application along the transverse direction;

[0012] Figure 3 This is a longitudinal cross-sectional view of the valve box of the first type disclosed in the embodiments of this application;

[0013] Figure 4 This is a longitudinal cross-sectional view of the valve box of the second type disclosed in the embodiments of this application;

[0014] Figure 5 This is a longitudinal cross-sectional view of the third type of valve box disclosed in the embodiments of this application;

[0015] Figure 6 This is a schematic diagram of the structure of the first type of discharge flange disclosed in the embodiments of this application;

[0016] Figure 7 This is a schematic diagram of the structure of the second type of discharge flange disclosed in the embodiments of this application;

[0017] Figure 8 This is a cross-sectional schematic diagram of the discharge flange disclosed in an embodiment of this application;

[0018] Figure 9 This is a schematic diagram of the hydraulic end structure disclosed in the embodiments of this application;

[0019] Figure 10 This is a cross-sectional schematic diagram of the first type of hydraulic end disclosed in the embodiments of this application;

[0020] Figure 11 This is a cross-sectional schematic diagram of the second type of hydraulic end disclosed in the embodiments of this application;

[0021] 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;

[0022] 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.

[0023] 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.

[0024] Explanation of reference numerals in the attached figures:

[0025] 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-Fastening hole;

[0026] 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;

[0027] 30 - Seals;

[0028] 40-plunger;

[0029] 50-packing box assembly. Detailed Implementation

[0030] 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.

[0031] 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.

[0032] The embodiments of this application will be described in detail below with reference to the accompanying drawings and specific examples and application scenarios.

[0033] 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 two first drain channels 12. The main channels 11 are used to accommodate components such as valve assemblies and plungers 40, and each first drain channel 12 is used to discharge fluid.

[0034] 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.

[0035] Optionally, 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 being further divided into an intake valve assembly and a discharge valve assembly. The intake valve assembly may be located in the low-pressure chamber 11b, the discharge valve assembly may be located in the high-pressure chamber 11a, and the plunger 40 is movably located 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.

[0036] 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 at least two first discharge channels 12. Of course, during this process, the periodic opening or closing of the suction valve assembly and the discharge valve assembly is also required to achieve the suction, pressurization, and discharge of the fluid.

[0037] Each first drainage channel 12 can extend along a first direction and communicate with multiple main channels 11 respectively, for discharging the pressurized fluid in the multiple main channels 11 to the outside. Based on this, the pressurized fluid in the multiple main channels 11 can be collected through each first drainage channel 12 and then discharged together.

[0038] 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.

[0039] In addition, by providing at least two first drainage channels 12 in the valve box 10, the fluid in 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 related technologies, 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.

[0040] refer to Figure 3In some embodiments, the valve box 10 may include a valve box module 10a, which may have multiple main channels 11 and each first drainage channel 12 located therein. 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.

[0041] 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 at least two first channel units 121. Each 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.

[0042] 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 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 multiple valve box modules 10a together and discharge it uniformly.

[0043] 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.

[0044] refer to Figure 1 and Figure 2 In 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.

[0045] 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.

[0046] 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.

[0047] 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 corresponding 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.

[0048] Optionally, since 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 with the corresponding first drainage channel 12.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] Based on the above configuration, during the reciprocating movement of the plunger 40, fracturing fluid can be input into the low-pressure chamber 11b through multiple fluid inlet channels 15. The fracturing fluid can flow into the alternating chamber 11c through the low-pressure chamber 11b and be pressurized by the plunger 40. The pressurized fracturing fluid can flow into the high-pressure chamber 11a through the alternating chamber 11c and finally be discharged through the first discharge channel 12.

[0053] 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.

[0054] 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.

[0055] This application also discloses a discharge flange 20 for connection with the valve box 10. The disclosed discharge flange 20 is provided with a second drainage channel 21, which is used to communicate with at least two first drainage channels 12. In this way, the fluid collected by at least two first drainage channels 12 can be discharged to the outside of the valve box 10 through the 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 two first drain passages 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 8 In some embodiments, the second drainage channel 21 may include at least two second channel units 211 and a third channel unit 212. One end of the at least two second channel units 211 is connected to the third channel unit 212, and the other end of the at least two second channel units 211 is connected to at least two first drainage channels 12.

[0058] Based on the above configuration, fluid can be received from at least two first drainage channels 12 through at least two second channel units 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 two second channel units 211 for centralized discharge.

[0060] 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 two second channel units 211 are disposed on the flange portion 20a and the connecting portion 20b, and a third channel unit 212 is disposed on the collection portion 20c. Specifically, at least two second channel units 211 can penetrate the flange portion 20a and the connecting portion 20b, and the third channel unit 212 can penetrate 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 embodiments, at least a portion of the at least two second channel units 211 may be tapered around the axis of the discharge flange 20. Optionally, a portion of the at least two second channel units 211 may be tapered around the axis of the discharge flange 20, i.e., the axis of a portion of the second channel units 211 forms an acute angle with the axis of the discharge flange 20, and another portion of the second channel units 211 may be cylindrical around the axis of the discharge flange 20, i.e., the axis of the other portion of the second channel units 211 is parallel to the axis of the discharge flange 20.

[0064] Of course, it is also possible that all the second channel units 211 in at least two second channel units 211 are distributed in a conical shape around the axis of the discharge flange 20, that is, the axis of all the second channel units 211 forms an acute angle with the axis of the discharge flange 20.

[0065] 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.

[0066] 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.

[0067] In some embodiments, the side of the discharge flange 20 facing the valve box 10 may be provided with a first mating structure, and the side of the valve box 10 may be provided with a second mating structure, and the first mating structure and the second mating structure are connected to achieve stable installation of the discharge flange 20 and the valve box 10.

[0068] refer to Figure 7, Figure 13 and Figure 14 In some embodiments, one of the first mating structure and the second mating structure may be provided with a boss 20d, and the other may be provided with a groove 14, with the boss 20d embedded in the groove 14. Based on this, the connection area between the discharge flange 20 and the valve box 10 can be increased, and the limiting is performed in various directions perpendicular to the first direction, thereby improving the reliability and stability of the connection between the discharge flange 20 and the valve box 10, and also helping to improve the sealing performance of the connection.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] refer to Figure 13 and Figure 14 In other embodiments, the seal 30 may be disposed between the boss 20d and the groove 14.

[0073] 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.

[0074] 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.

[0075] This application also discloses a pump, which includes the valve box assembly described above.

[0076] 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 discharge flange for mating connection with a valve case (10) of a fluid end, characterized in that, The discharge flange (20) is provided with at least two second channel units (211) and a third channel unit (212). One end of the at least two second channel units (211) is connected to the third channel unit (212), and the other end of the at least two second channel units (211) is connected to the first drain channel (12) provided in the valve box (10).

2. Discharge flange according to claim 1, characterized in that The discharge flange (20) includes a flange part (20a), a connecting part (20b), and a collection part (20c) arranged in sequence. The flange (20a) is used to connect to the valve box (10), and the at least two second channel units (211) are provided on the flange (20a) and the connecting part (20b). The third channel unit (212) is located in the current collection section (20c).

3. Discharge flange according to claim 1 or 2, characterized in that At least a portion of the at least two second channel units (211) are tapered around the axis of the discharge flange (20).

4. The drain flange of claim 1, wherein, The discharge flange (20) has a first mating structure on the side facing the valve box (10), and the first mating structure is used to connect with a second mating structure on the side of the valve box (10).

5. The drain flange of claim 4, wherein, One of the first mating structure and the second mating structure is a boss (20d) and the other is a groove (14), with the boss (20d) embedded in the groove (14).

6. The drain flange of claim 5, wherein, A sealing element (30) is provided between the end face of the boss (20d) and the bottom of the groove (14). And / or, a seal (30) is provided between the outer wall of the boss (20d) and the inner wall of the groove (14).

7. Discharge flange according to claim 6, characterized in that At least one of the outer wall of the boss (20d) and the inner wall of the groove (14) is provided with a third annular groove, and the sealing element (30) is provided in the third annular groove.

8. A valve box assembly, characterized in that, include: The valve box (10) and the discharge flange (20) according to any one of claims 1 to 7, the discharge flange (20) being connected to at least one end of the valve box (10) along a first direction.

9. The valve chest assembly of claim 8, wherein, A sealing element (30) is provided between the valve box (10) and the discharge flange (20), and the sealing element (30) is used to surround the periphery of the first discharge channel (12).

10. The valve chest assembly of claim 9, wherein, The valve box (10) has a first annular groove on the side facing the discharge flange (20), and the sealing element (30) is provided in the first annular groove. And / or, the discharge flange (20) has a second annular groove on the side facing the valve box (10), and the sealing element (30) is provided in the second annular groove.

11. A pump characterized by Includes the valve box assembly as described in any one of claims 8 to 10.

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