Discharge flange, valve box assembly and pump

Abstract

The invention 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 technical fields such as oil and gas, mines, etc., and specifically relates to a discharge flange, a valve box assembly and a pump. Background Art

[0002] In the hydraulic end of some plunger pumps in the related art, the discharge pipeline is directly connected to the end of the valve box to discharge the pressurized fracturing fluid in the valve box through the discharge pipeline. However, the disassembly and assembly between the discharge pipeline and the valve box are inconvenient, and the discharge pipeline bears a large load from the fracturing fluid, resulting in the problem that the discharge pipeline is easily damaged and the fracturing fluid leaks. Summary of the Invention

[0003] The purpose of the embodiments of this application is to provide a discharge flange, a valve box assembly and a pump, which can solve problems such as inconvenient disassembly and assembly between the discharge pipeline and the valve box, and large load bearing.

[0004] To solve the above technical problems, this application is implemented as follows: The embodiments of this application provide a discharge flange for cooperating and connecting with the valve box of the hydraulic end. The discharge flange is provided with at least two second channel units and a third channel unit; 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 corresponding communication with a first liquid discharge channel provided in the valve box.

[0005] The embodiments of this application provide a valve box assembly, including: a valve box and the above-mentioned discharge flange, and the discharge flange is connected to at least one end of the valve box along the first direction.

[0006] The embodiments of this application provide a pump, including the above-mentioned valve box assembly.

[0007] In the embodiments of this application, by providing a discharge flange and connecting the discharge flange to the valve box, the pressurized fracturing fluid in the valve box is discharged through the discharge flange, and it is not easily damaged when bearing a large load from the fracturing fluid, and a stable connection with the valve box is ensured, effectively preventing the fracturing fluid from leaking; and, through the discharge flange, the discharge pipeline can be connected to the valve box, which can facilitate the disassembly and assembly between the discharge pipeline and the valve box and improve the disassembly and assembly efficiency. Brief Description of the Drawings

[0008] Figure 1 It is a schematic structural diagram of the valve box disclosed in the embodiments of this application; Figure 2 It is a schematic cross-sectional view of the valve box along the transverse direction disclosed in the embodiments of this application; Figure 3 It is a schematic longitudinal cross-sectional view of the first form of the valve box disclosed in the embodiments of this application; Figure 4 Schematic longitudinal sectional view of the second form of the valve box disclosed in the embodiments of the present application; Figure 5 Schematic longitudinal sectional view of the third form of the valve box disclosed in the embodiments of the present application; Figure 6 Schematic structural view of the first form of the discharge flange disclosed in the embodiments of the present application; Figure 7 Schematic structural view of the second form of the discharge flange disclosed in the embodiments of the present application; Figure 8 Schematic sectional view of the discharge flange disclosed in the embodiments of the present application; Figure 9 Schematic structural view of the hydraulic end disclosed in the embodiments of the present application; Figure 10 Schematic sectional view of the first form of the hydraulic end disclosed in the embodiments of the present application; Figure 11 Schematic sectional view of the second form of the hydraulic end disclosed in the embodiments of the present application; Figure 12 Schematic sectional view of the first setting form of the valve box, discharge flange and seal in the embodiments of the present application; Figure 13 Schematic sectional view of the second setting form of the valve box, discharge flange and seal in the embodiments of the present application; Figure 14 Schematic sectional view of the third setting form of the valve box, discharge flange and seal in the embodiments of the present application.

[0009] Explanation 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 - first liquid discharge channel; 121 - first channel unit; 13 - connecting channel; 14 - groove; 15 - liquid inlet channel; 16 - fastening hole; 20 - discharge flange; 20a - flange part; 20b - connecting part; 20c - current - collecting part; 20d - boss; 21 - second liquid discharge channel; 211 - second channel unit; 212 - third channel unit; 30 - seal; 40 - plunger; 50 - packing box assembly. Detailed implementation manners

[0010] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0011] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually of the same category, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally indicates an "or" relationship between the associated objects before and after.

[0012] Next, the embodiments of the present application will be described in detail with reference to the accompanying drawings through specific embodiments and their application scenarios.

[0013] Reference Figures 1 to 14 , an embodiment of the present application discloses a valve box 10, which is applied to the hydraulic end of a pump. The disclosed valve box 10 is provided with a plurality of main channels 11 and at least two first drain channels 12. Among them, 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 drain fluid.

[0014] The plurality of main channels 11 are arranged along a first direction, and each main channel 11 extends along a second direction. Among them, the first direction and the second direction can be arranged at an angle. Exemplarily, the first direction and the second direction can be perpendicular. Of course, they can also form other angles other than 90°, and no specific limitation is made here.

[0015] Optionally, the main channel 11 can include a high-pressure chamber 11a, a low-pressure chamber 11b, and an alternating chamber 11c; correspondingly, the valve assembly can include components such as a valve seat and a valve component. The valve component can be further divided into an intake valve component and a discharge valve component. Among them, the intake valve component can be arranged in the low-pressure chamber 11b, the discharge valve component can be arranged in the high-pressure chamber 11a, and the plunger 40 is movably arranged in the alternating chamber 11c. In addition, as Figure 9 shown, a packing box assembly 50 can be provided on the side of the valve box 10, and the plunger 40 is movably inserted through the packing box assembly 50 to play a certain guiding and sealing role for the plunger 40 through the packing box assembly 50.

[0016] Based on the above settings, during the reciprocating movement of the plunger 40, fluid can be sucked into the low-pressure chamber 11b, and the fluid is pressurized in the alternating chamber 11c. The pressurized fluid enters the high-pressure chamber 11a and is discharged via at least two first drainage 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.

[0017] Each first drainage channel 12 can extend in the first direction and communicate with a plurality of main channels 11 respectively, for discharging the pressurized fluid in the plurality of main channels 11 to the outside. Based on this, the pressurized fluid in the plurality of main channels 11 can be collected through each first drainage channel 12 and then discharged together.

[0018] In the embodiment of the present application, the valve box 10 is provided with a plurality of main channels 11. Each main channel 11 can be used to accommodate a valve assembly (including a valve seat, a valve assembly, etc.) and the plunger 40. Each main channel 11 extends in the second direction, so that the main channels 11 of the valve box 10 are located in the same direction as a whole. Compared with the prior art in which the valve cavity and the plunger cavity form an intersection line at a 90° angle, there is no intersection line in the valve box 10 of the embodiment of the present application. Thus, the erosion of the fluid on the intersection line area during the operation can be effectively alleviated, which is beneficial to improving the service life of the valve box 10. Moreover, it is also beneficial to reduce the height dimension of the valve box 10, make the valve box 10 more compact in design, and is beneficial to reducing costs and weights.

[0019] In addition, by providing at least two first drainage channels 12 in the valve box 10, the fluid in the plurality of main channels 11 can be discharged respectively. Compared with the prior art in which a drainage module is separately installed on the outer side wall of the valve box 10, the embodiment of the present application can make the structure more compact and is not prone to leakage after long-term operation, which is beneficial to extending the operation cycle of the fracturing equipment.

[0020] Reference Figure 3 In some embodiments, the valve box 10 can include a valve box module 10a. A valve box module 10a can be provided with a plurality of main channels 11, and each first drainage channel 12 is provided in the valve box module 10a. Based on this setting, the entire valve box 10 can be an integral structure, which is beneficial to improving the overall strength of the valve box 10 and shortening the manufacturing cycle of the valve box 10.

[0021] Reference Figure 4 And Figure 5, in some other embodiments, the valve box 10 may include a plurality of valve box modules 10a arranged in sequence along a first direction. Each valve box module 10a may be provided with at least one main channel 11. Each valve box module 10a may be provided with at least two first channel units 121. Each first channel unit 121 communicates with 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 communicate in sequence to form a first drainage channel 12.

[0022] Based on the above settings, the valve box 10 can be divided into a plurality of valve box modules 10a. Each valve box module 10a has a separate function and can meet the reciprocating movement of the plunger 40 and the suction, pressurization, and discharge of the fluid. After arranging the plurality of valve box modules 10a along the first direction, the first channel units 121 of each one can communicate in sequence to form a first drainage channel 12, so as to collect the pressurized fluids of the plurality of valve box modules 10a together and discharge them uniformly.

[0023] Compared with the above-mentioned integral valve box 10, the split-type valve box 10 can be repaired or replaced separately when damage occurs in a single valve box module 10a, without having to repair or replace the entire valve box 10. Thus, the difficulty and cost of repair or replacement can be reduced, and the overall service life of the valve box 10 can be increased on the premise of meeting the operation requirements.

[0024] Reference Figure 1 and Figure 2 , in some embodiments, the valve box 10 may be provided with two first drainage channels 12. The two first drainage channels 12 are distributed on both sides of each main channel 11 along a third direction and communicate with each main channel 11 respectively. Based on this, the pressurized fluid in each main channel 11 can be discharged jointly through the two first drainage channels 12, so as to increase the fluid flow area on the premise of making full use of the external dimensions of the valve box 10, which is beneficial to improving the fluid discharge efficiency.

[0025] Among them, the first direction, the second direction, and the third direction may be perpendicular to each other pairwise. Exemplarily, the first direction may be the left-right direction, the second direction may be the front-back direction, and the third direction may be the up-down direction. Of course, other forms are also possible and are not specifically limited here.

[0026] 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 plurality of first drainage channels 12 may also adopt other arrangement forms, such as uniform distribution, non-uniform distribution, etc.

[0027] Reference Figure 11, in some embodiments, the valve box 10 may further be provided with a plurality of connecting channels 13 arranged in the first direction, and each connecting channel 13 communicates with the corresponding main channel 11 and the corresponding first drainage channel 12. Based on this, the pressurized fluid in the corresponding main channel 11 can be conveyed to the first drainage channel 12 through the connecting channel 13, and the fluid discharged from the plurality of main channels 11 can be collected through the first drainage channel 12 for centralized discharge.

[0028] Optionally, since there are at least two first drainage channels 12, the valve box 10 may be provided with at least two groups of a plurality of connecting channels 13 arranged in the first direction, and each group of connecting channels 13 communicates with the plurality of main channels 11 and the corresponding first drainage channel 12.

[0029] In some more specific embodiments, there are two first drainage channels 12, which are respectively arranged on both sides of the main channel 11 along the third direction; correspondingly, two groups of connecting channels 13 can be provided, and the two groups of connecting channels 13 are respectively located on both sides of the main channel 11 along the third direction, so as to facilitate the separate communication between each main channel 11 and the two first drainage channels 12.

[0030] 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 in the second direction. Among them, the alternating chamber 11c is used to be disposed opposite to the plunger 40 at the hydraulic end, and each first drainage channel 12 communicates with the high-pressure chamber 11a.

[0031] Furthermore, the side wall of the valve box 10 may be provided with a plurality of liquid inlet channels 15, and each liquid inlet channel 15 extends towards the main channel 11 and communicates with the low-pressure chamber 11b.

[0032] Based on the above settings, during the reciprocating movement of the plunger 40, fracturing fluid can be respectively input into the low-pressure chamber 11b through the plurality of liquid inlet channels 15, and the fracturing fluid can flow into the alternating chamber 11c through the low-pressure chamber 11b and be pressurized by the extrusion of 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 drainage channel 12.

[0033] Optionally, the liquid inlet channels 15 are distributed on the side wall of at least one side of the valve box 10 along the third direction. Optionally, the liquid inlet channels 15 can be located at the top of the valve box 10 or on the side of the valve box 10, and the position of the liquid inlet channels 15 can be specifically set according to the liquid inlet requirements.

[0034] In some embodiments, at least one end face of the valve box 10 along the first direction may be provided with fastening holes 16, and fasteners can be installed through the fastening holes 16 to install a head (such as the discharge flange 20 described below) at the end of the valve box 10 through the fasteners.

[0035] The embodiment of the present application also discloses a discharge flange 20 for mating connection with the above valve box 10. The disclosed discharge flange 20 is provided with a second liquid discharge channel 21, and the second liquid discharge channel 21 is used to communicate with at least two first liquid discharge channels 12. In this way, the fluid collected by at least two first liquid discharge channels 12 can be discharged to the outside of the valve box 10 through the second liquid discharge channel 21.

[0036] Optionally, the discharge flange 20 is detachably connected to the side of the valve box 10 so that the second liquid discharge channel 21 is docked with at least two first liquid discharge channels 12. For example, fasteners such as bolts are used to mount the discharge flange 20 to the side of the valve box 10.

[0037] Reference Figures 5 to 8 , in some embodiments, the second liquid discharge channel 21 may include at least two second channel units 211 and a third channel unit 212. One end of at least two second channel units 211 communicates with the third channel unit 212, and the other end of at least two second channel units 211 communicates with at least two first liquid discharge channels 12 correspondingly.

[0038] Based on the above settings, the fluid conveyed from at least two first liquid discharge channels 12 can be received by at least two second channel units 211, and then conveyed to the third channel unit 212, and finally the fluid is discharged through the third channel unit 212.

[0039] It should be noted here that the number of second channel units 211 is equal to the number of first liquid discharge channels 12 and they are docked 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.

[0040] In some embodiments, the discharge flange 20 may include a flange portion 20a, a connecting portion 20b, and a current collecting portion 20c arranged in sequence. The flange portion 20a is used to connect with the valve box 10, at least two second channel units 211 are arranged on the flange portion 20a and the connecting portion 20b, and the third channel unit 212 is arranged on the current collecting portion 20c. Specifically, at least two second channel units 211 can penetrate through the flange portion 20a and the connecting portion 20b, and the third channel unit 212 can penetrate through the current collecting portion 20c.

[0041] Optionally, the flange portion 20a can be mounted to the side of the valve box 10 through fasteners, and the function of the connecting portion 20b is to connect the flange portion 20a and the current collecting portion 20c to facilitate the structural transition between the flange portion 20a and the current collecting portion 20c.

[0042] Exemplarily, the flange portion 20a, the connection portion 20b, and the manifold portion 20c can be an integral structure, that is, the entire discharge flange 20 is an integral structure; of course, the flange portion 20a, the connection portion 20b, and the manifold portion 20c can also be fixedly connected in sequence.

[0043] In some embodiments, at least a portion of at least two second channel units 211 can be distributed in a conical shape around the axis of the discharge flange 20. Optionally, a portion of the at least two second channel units 211 can be distributed in a conical shape around the axis of the discharge flange 20, that is, the axes of a portion of the second channel units 211 form an acute angle with the axis of the discharge flange 20, and another portion of the second channel units 211 can be distributed in a cylindrical shape around the axis of the discharge flange 20, that is, the axes of the other portion of the second channel units 211 are parallel to the axis of the discharge flange 20.

[0044] Of course, it can also be that all of the at least two second channel units 211 are distributed in a conical shape around the axis of the discharge flange 20, that is, the axes of all the second channel units 211 form an acute angle with the axis of the discharge flange 20.

[0045] In some more specific embodiments, the valve box 10 can be provided with two first liquid discharge channels 12. Correspondingly, the discharge flange 20 can be provided with two second channel units 211, and the two second channel units 211 are respectively in corresponding communication with the two first liquid discharge channels 12. The third channel unit 212 is in communication with the two second channel units 211 to facilitate the collection of the fluids discharged from the two second channel units 211, so as to discharge the fluids together.

[0046] Based on the above valve box assembly, an embodiment of the present application also discloses a valve box assembly. The disclosed valve box assembly includes the above valve box 10 and the above discharge flange 20, wherein the discharge flange 20 is connected to at least one end of the valve box 10 along the first direction. In this way, the discharge flange 20 at at least one end can be docked with other pipelines to facilitate the discharge of the fracturing liquid in the valve box 10 from at least one end.

[0047] In some embodiments, a first mating structure can be provided on the side of the discharge flange 20 facing the valve box 10, a second mating structure can be provided on the side of the valve box 10, and the first mating structure is connected to the second mating structure to achieve the stable installation of the discharge flange 20 and the valve box 10.

[0048] Reference 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, and the boss 20d is 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 discharge flange 20 can be limited in each direction perpendicular to the first direction, so that the reliability and stability of the connection between the discharge flange 20 and the valve box 10 can be improved, and it is also beneficial to improve the sealing performance of the connection part.

[0049] Further, a seal 30 may be provided between the valve box 10 and the discharge flange 20, and the seal 30 is disposed around the periphery of the first liquid discharge passage 12. In this way, the seal 30 can seal the connection between the valve box 10 and the discharge flange 20, effectively preventing the fluid in the first liquid discharge passage 12 from leaking out from the connection between the valve box 10 and the discharge flange 20.

[0050] Reference Figure 12 , in some embodiments, the seal 30 may be disposed between the side surface of the valve box 10 facing the discharge flange 20 and the side surface of the discharge flange 20 facing the valve box 10.

[0051] Optionally, the side surface of the valve box 10 facing the discharge flange 20 may be provided with a first annular groove, and a part of the seal 30 is embedded in the first annular groove and abuts against the side surface of the discharge flange 20 facing the valve box 10; or, the side surface of the discharge flange 20 facing the valve box 10 may be provided with a second annular groove, and a part of the seal 30 is embedded in the second annular groove and abuts against the side surface of the valve box 10 facing the discharge flange 20; or, the side surface of the valve box 10 facing the discharge flange 20 may be provided with a first annular groove, a part of the seal 30 is embedded in the first annular groove, the side surface of the discharge flange 20 facing the valve box 10 may be provided with a second annular groove, and a part of the seal 30 is embedded in the first annular groove and another part is embedded in the second annular groove.

[0052] Reference Figure 13 and Figure 14 , in other embodiments, the seal 30 may be disposed between the boss 20d and the groove 14.

[0053] 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 disposed 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.

[0054] Exemplarily, 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 part of the seal 30 is embedded in the third annular groove of one and abuts against the other.

[0055] An embodiment of the present application also discloses a pump, and the disclosed pump includes the above valve box assembly.

[0056] The embodiments of the present application have been described above with reference to the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative rather than restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them fall within the protection scope of the present application.

Claims

1. A discharge flange for mating connection with a valve box (10) of a hydraulic 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) communicates with the third channel unit (212), and the other ends of the at least two second channel units (211) are used to correspondingly communicate with a first liquid discharge channel (12) provided in the valve box (10).

2. The discharge flange according to claim 1, wherein, The discharge flange (20) includes a flange portion (20a), a connecting portion (20b), and a flow collecting portion (20c) arranged in sequence; The flange portion (20a) is used to connect with the valve box (10), and the at least two second channel units (211) are arranged in the flange portion (20a) and the connecting portion (20b); The third channel unit (212) is arranged in the flow collecting portion (20c).

3. The discharge flange according to claim 1 or 2, characterized in that, At least a part of the at least two second channel units (211) is distributed in a conical shape around the axis of the discharge flange (20).

4. The discharge flange according to claim 1, characterized in that, A first matching structure is provided on the side of the discharge flange (20) facing the valve box (10), and the first matching structure is used to connect with a second matching structure provided on the side of the valve box (10).

5. The discharge flange according to claim 4, characterized in that, One of the first matching structure and the second matching structure is a boss (20d), and the other is a groove (14), and the boss (20d) is embedded in the groove (14).

6. The discharge flange according to claim 5, characterized in that, A sealing member (30) is provided between the end face of the boss (20d) and the bottom of the groove (14); And / or, a sealing member (30) is provided between the outer wall of the boss (20d) and the inner wall of the groove (14).

7. The 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 member (30) is arranged in the third annular groove.

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

9. The valve box assembly according to claim 8, characterized in that, A sealing member (30) is provided between the valve box (10) and the discharge flange (20), and the sealing member (30) is used to surround the periphery of the first liquid discharge channel (12).

10. The valve box assembly according to claim 9, wherein, A first annular groove is provided on the side of the valve box (10) facing the discharge flange (20), and the sealing member (30) is arranged in the first annular groove; And / or, a second annular groove is provided on the side of the discharge flange (20) facing the valve box (10), and the sealing member (30) is arranged in the second annular groove.

11. A pump, characterized in that, Comprising the valve box assembly according to any one of claims 8 to 10.

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