Fluid end assembly and pump

Abstract

The utility model discloses a fluid end assembly and a pump, and relates to the fields of oil gas, mines and the like. A fluid end assembly includes: a plurality of fluid end modules disposed side by side in a first direction; each fluid end module comprises a fluid end shell, a plunger, a valve seat and a valve assembly. The fluid end shell comprises a valve box and a packing box, the packing box is detachably arranged on the valve box, the valve box is provided with a main channel, and the packing box is provided with a plunger channel communicated with the main channel; the plunger is movably arranged in the plunger channel and can move in or out of the main channel; the main channel is used for containing the valve seat and the valve assembly. The problems that the whole valve box is difficult to maintain, and the whole replacement cost is high can be solved.

Description

Technical Field

[0001] This application belongs to the technical field of fracturing equipment, specifically relating to a hydraulic end assembly and pump. Background Technology

[0002] Some hydraulic terminals in related technologies adopt an integral valve box, which has multiple valve chambers arranged side by side, and multiple packing boxes are provided on the side of the valve box, with each packing box corresponding to one of the multiple valve chambers.

[0003] Prolonged operation of the hydraulic end can damage the valve chamber, necessitating repair or replacement of the entire valve box, which presents challenges such as difficult repairs and high replacement costs. Utility Model Content

[0004] The purpose of this application is to provide a hydraulic end assembly and pump that can solve the problems of difficult overall maintenance of valve boxes and high overall replacement costs.

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

[0006] This application provides a hydraulic end assembly, including: a plurality of hydraulic end modules arranged side by side along a first direction;

[0007] Each of the hydraulic end modules includes a hydraulic end housing, a plunger, a valve seat, and a valve assembly;

[0008] The hydraulic end housing includes a valve box and a packing box. The packing box is detachably disposed in the valve box. The valve box has a main channel, and the packing box has a plunger channel communicating with the main channel.

[0009] The plunger is movably disposed in the plunger channel and can move into or out of the main channel;

[0010] The main channel is used to accommodate the valve seat and the valve assembly.

[0011] This application also provides a pump, including the above-described hydraulic end assembly.

[0012] The hydraulic end assembly in this embodiment includes multiple hydraulic end modules. The hydraulic end housing of each hydraulic end module may include a valve box and a packing box, and the packing box and the valve box are detachably connected. Thus, after the hydraulic end assembly has been in operation for a long time, even if the hydraulic end housing of individual hydraulic end modules is eroded or worn, or the packing box is worn, the valve box and packing box in the corresponding hydraulic end housing can be repaired or replaced individually. This eliminates the need to repair or replace the entire hydraulic end housing or even the entire hydraulic end assembly, thereby reducing the difficulty and cost of repair or replacement. Attached Figure Description

[0013] Figure 1 This is a first structural schematic diagram of the hydraulic end module disclosed in an embodiment of this application;

[0014] Figure 2 This is a schematic diagram of the second structure of the hydraulic end module disclosed in the embodiments of this application;

[0015] Figure 3 This is a cross-sectional schematic diagram of the hydraulic end module (in the draining state) disclosed in the embodiments of this application;

[0016] Figure 4 This is a cross-sectional schematic diagram of the hydraulic end module (in liquid suction state) disclosed in the embodiments of this application;

[0017] Figure 5 This is a schematic diagram of the hydraulic end housing disclosed in the embodiments of this application;

[0018] Figure 6 This is a cross-sectional schematic diagram of the first type of hydraulic end housing disclosed in the embodiments of this application;

[0019] Figure 7 This is a cross-sectional schematic diagram of the second type of hydraulic end housing disclosed in the embodiments of this application;

[0020] Figure 8 This is a schematic diagram of the plunger pump disclosed in the embodiments of this application.

[0021] Explanation of reference numerals in the attached figures:

[0022] 10-Hydraulic end module;

[0023] 11-Hydraulic end housing; 111-Valve box; 1111-Main passage; 1112-Threaded hole; 1113-First annular sealing surface; 1114-Counter groove; 112-Packing box; 1121-Packing box body; 11211-Plunger passage; 11212-Second annular sealing surface; 11213-Lubricating oil hole; 1122-Packing assembly; 1123-Packing cap;

[0024] 12-Plunger;

[0025] 13-Valve seat;

[0026] 14-Fasteners;

[0027] 15 - Sealing sleeve; 151 - Annular protrusion;

[0028] 161 - First sealing ring; 162 - Second sealing ring; 163 - Third sealing ring;

[0029] 171 - Discharge gland; 172 - Discharge cap;

[0030] 20-Connecting plate;

[0031] 30 - Powertrain assembly. Detailed Implementation

[0032] 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.

[0033] 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.

[0034] The embodiments of this application will be described in detail below with reference to the accompanying drawings and specific examples and application scenarios.

[0035] refer to Figures 1 to 8 This application discloses a hydraulic end assembly, which includes a plurality of hydraulic end modules 10 arranged side by side along a first direction.

[0036] Each hydraulic end module 10 includes a hydraulic end housing 11, a plunger 12, a valve seat 13, and a valve assembly. The hydraulic end housing 11 is the basic component, providing a mounting base for the plunger 12, valve seat 13, and valve assembly. The plunger 12 is used to pressurize the fracturing fluid. The valve seat 13 limits the movement of the valve assembly. Thus, the reciprocating movement of the plunger 12 causes the valve assembly to open or close periodically, allowing the fracturing fluid to be drawn into the hydraulic end housing 11, pressurized within the housing, and finally discharged. The valve assembly can be either an intake valve assembly or an exhaust valve assembly.

[0037] The hydraulic end housing 11 includes a valve box 111 and a packing box 112. The packing box 112 is detachably disposed on the valve box 111 to facilitate the disassembly and assembly of the packing box 112 and the valve box 111, thereby facilitating the maintenance or replacement of the valve box 111 or the packing box 112.

[0038] Valve box 111 may have a main channel 1111, and packing box 112 may have a plunger channel 11211, which communicates with the main channel 1111. Plunger 12 is movably disposed in plunger channel 11211 and can move in or out of the main channel 1111. Thus, the packing box 112 can support and seal the plunger 12, preventing fracturing fluid from leaking around the plunger 12. Furthermore, as the plunger 12 moves, its front end can reciprocate in or out of the main channel 1111, allowing fracturing fluid to be drawn into and pressurized within the main channel 1111. In addition, the main channel 1111 can accommodate components such as valve seat 13 and valve assembly.

[0039] Based on the above configuration, the hydraulic end assembly in this embodiment includes multiple hydraulic end modules 10. The hydraulic end housing 11 of each hydraulic end module 10 may include a valve box 111 and a packing box 112, and the packing box 112 is detachably connected to the valve box 111. Thus, after the hydraulic end assembly has been in operation for a long time, even if the hydraulic end housing 11 of individual hydraulic end modules 10 is eroded or worn, or the packing box 112 is worn, the valve box 111 and the packing box 112 in the corresponding hydraulic end housing 11 can be repaired or replaced individually, so that the entire hydraulic end housing 11 or even the entire hydraulic end assembly does not need to be repaired or replaced, thereby reducing the difficulty and cost of repair or replacement.

[0040] In some embodiments, a threaded hole 1112 may be provided on one side of the valve box 111, and the threaded hole 1112 is coaxially arranged with the main channel 1111. Optionally, a protrusion may be provided on one side of the valve box 111, and the protrusion may have a threaded hole 1112; or, the side wall of the valve box 111 may be directly provided with a threaded hole 1112.

[0041] Correspondingly, one end of the packing box 112 may be provided with an external thread, which is threaded to the threaded hole 1112.

[0042] Based on the above configuration, the packing box 112 can be stably installed on the side of the valve box 111, and the packing box 112 can be easily disassembled and assembled.

[0043] Optionally, a sealing ring may be provided at the connection between the packing box 112 and the valve box 111 to further improve the sealing performance of the connection between the packing box 112 and the valve box 111, so as to prevent leakage of fracturing fluid.

[0044] In other embodiments, the hydraulic end module 10 may further include a plurality of fasteners 14, which are distributed circumferentially around the outer periphery of the plunger channel 11211 and secure the packing box 112 to one side of the valve box 111. This ensures that the packing box 112 is securely installed to the valve box 111 and facilitates the assembly and disassembly of the packing box 112.

[0045] Optionally, the packing box 112 may have multiple first fastening holes arranged along the outer periphery of the plunger channel 11211; correspondingly, the side wall of the valve box 111 may have multiple second fastening holes arranged along the outer periphery of the main channel 1111. Based on this, after the packing box 112 is mated with the valve box 111, the multiple first fastening holes and multiple second fastening holes are aligned respectively, and then fasteners 14 are installed in each set of aligned first and second fastening holes to achieve a tight connection between the packing box 112 and the valve box 111. For example, the first fastening hole may be a smooth hole, and the second fastening hole may be a threaded hole 1112.

[0046] In some embodiments, the hydraulic end module 10 may further include a sealing sleeve 15 for sealing the outer periphery of the plunger 12, wherein the sealing sleeve 15 may be fitted on the outer side of the plunger 12, and the inner wall of the sealing sleeve 15 may be tightly fitted with the outer wall of the plunger 12, and the plunger 12 may reciprocate within the sealing sleeve 15.

[0047] To facilitate the installation of the sealing sleeve 15, a first annular sealing surface 1113 can be provided at the end of the main channel 1111 near the packing box 112. One end of the sealing sleeve 15 is sealed between the plunger 12 and the first annular sealing surface 1113. Based on this, a seal can be achieved between the plunger 12 and the valve box 111 through one end of the sealing sleeve 15 to prevent fracturing fluid leakage.

[0048] Optionally, the first annular sealing surface 1113 can be a cylindrical surface or a conical surface, such as a cylindrical surface or a conical surface.

[0049] Accordingly, a second annular sealing surface 11212 may be provided at one end of the plunger channel 11211 in the approach direction, and the other end of the sealing sleeve 15 is sealed between the plunger 12 and the second annular sealing surface 11212. Based on this, the other end of the sealing sleeve 15 can be used to seal the plunger 12 and the packing box 112 to prevent fracturing fluid leakage.

[0050] Optionally, the second annular sealing surface 11212 can be a cylindrical surface or a conical surface, such as a cylindrical surface or a conical surface.

[0051] In some more specific embodiments, the two ends of the sealing sleeve 15 can be sealed to the first annular sealing surface 1113 and the second annular sealing surface 11212 respectively, so that it can play a sealing role between the plunger 12 and the valve box 111, and also between the plunger 12 and the packing box 112.

[0052] Furthermore, a groove 1114 may be provided on one side of the valve box 111, with the first annular sealing surface 1113 and the main channel 1111 respectively located at the bottom of the groove 1114; or, a groove 1114 may be provided on one side of the packing box 112, with the second annular sealing surface 11212 and the plunger channel 11211 respectively located at the bottom of the groove 114; or, a groove 1114 may be provided on one side of the valve box 111 and one side of the packing box 112 respectively, and the grooves 1114 of the two are arranged opposite to each other.

[0053] Accordingly, the outer wall of the sealing sleeve 15 may be provided with an annular protrusion 151, which is embedded in the recess 1114. Based on this, the axial and radial limiting of the sealing sleeve 15 can be achieved by the cooperation of the annular protrusion 151 and the recess 1114, thereby improving the installation stability of the sealing sleeve 15.

[0054] In some embodiments, each valve box 111 may be provided with multiple main channels 1111 arranged side by side along a first direction. Multiple sets of plungers 12, valve bodies and valve seats 13 can be installed through the multiple main channels 1111, so that multiple sets of fracturing operations can be realized through each hydraulic end module 10, thereby improving fracturing efficiency.

[0055] Accordingly, the hydraulic end housing 11 may include multiple packing boxes 112, which are detachably disposed in the valve box 111, and the plunger channels 11211 of the multiple packing boxes 112 are connected to the multiple main channels 1111 in a one-to-one correspondence. Based on this, the multiple packing boxes 112 can be used to seal the support of the multiple plungers 12, thereby ensuring that fracturing fluid does not leak around each plunger 12.

[0056] In some embodiments, the hydraulic end module 10 may further include a first sealing ring 161 and a second sealing ring 162. The first sealing ring 161 and the second sealing ring 162 may be respectively sealed between the valve seat 13 and the inner wall of the main channel 1111, and along the axial direction of the hydraulic end module 10, the first sealing ring 161 and the second sealing ring 162 are respectively located on both sides of the liquid inlet channel of the valve box 111.

[0057] Based on the above configuration, the first sealing ring 161 and the second sealing ring 162 can seal the space between the valve seat 13 and the inner wall of the main channel 1111 to prevent fracturing fluid from entering the space between the valve seat 13 and the inner wall of the main channel 1111. They can also seal both sides of the inlet channel to prevent fracturing fluid leakage.

[0058] In some embodiments, the hydraulic end module 10 may further include a discharge cap 171 and a discharge nut 172. The discharge cap 171 is sealed at the end of the main channel 1111 opposite to the packing box 112, and the discharge nut 172 is detachably disposed on the main channel 1111 and presses against the discharge cap 171. Based on this, the main channel 1111 can be closed by the discharge nut 172, and the discharge cap 171 can press against the discharge nut 172 to ensure the stability of the discharge cap 171 under pressure. In addition, it can also facilitate the disassembly and assembly of the discharge cap 171 to facilitate maintenance of the valve box 111.

[0059] Furthermore, the hydraulic end module 10 may include a second sealing ring 162 and a third sealing ring 163, wherein the second sealing ring 162 is sealed between the valve seat 13 and the inner wall of the main channel 1111, and the third sealing ring 163 is sealed between the discharge cap 171 and the inner wall of the main channel 1111, and the second sealing ring 162 and the third sealing ring 163 are respectively located on both sides of the liquid storage channel of the valve box 111.

[0060] Based on the above configuration, the second sealing ring 162 can seal the space between the valve seat 13 and the inner wall of the main channel 1111 to prevent fracturing fluid from entering the space between the valve seat 13 and the inner wall of the main channel 1111. The third sealing ring 163 can seal the space between the discharge cap 171 and the inner wall of the main channel 1111 to prevent fracturing fluid from entering the space between the discharge cap 171 and the inner wall of the main channel 1111. In addition, the second sealing ring 162 and the third sealing ring 163 can also seal both sides of the liquid outlet channel to prevent fracturing fluid leakage.

[0061] In some embodiments, the packing box 112 may include a packing box body 1121, a packing assembly 1122, and a packing cap 1123. The packing box body 1121 has a plunger channel 11211, and the packing assembly 1122 is sealingly connected between the inner wall of the plunger channel 11211 and the outer wall of the plunger 12. Thus, the packing assembly 1122 can seal the gap between the plunger 12 and the packing box body 1121, preventing leakage of fracturing fluid.

[0062] Optionally, the packing box body 1121 can be an integral structure or a split structure.

[0063] The packing assembly 1122 may include components such as packing, spacer ring, pressure ring, and oil ring. Of course, it may also take other forms, which are not specifically limited here.

[0064] The packing gland cap 1123 is sleeved on the outside of the plunger 12 and threadedly connected to the packing gland box body 1121. The end of the packing gland cap 1123 presses against the packing gland assembly 1122. In this way, the packing gland cap 1123 can limit the packing gland assembly 1122 to prevent it from moving freely under the action of the plunger 12. In addition, it can also facilitate the replacement of the packing gland assembly 1122.

[0065] In some embodiments, the side wall of the packing box body 1121 may be provided with a lubricating oil hole 11213. The lubricating oil hole 11213 extends to the outer periphery of the packing box body towards the plunger channel 11211 and communicates with the plunger channel 11211. The lubricating oil hole 11213 is correspondingly provided with the packing assembly 1122.

[0066] Based on the above configuration, lubricating oil or grease can be injected into the packing assembly 1122 in the plunger channel 11211 through the lubricating oil hole 11213, thereby achieving lubrication between the packing assembly 1122 and the plunger 12 and ensuring good lubrication between the plunger 12 and the packing assembly 1122.

[0067] Based on the above-described hydraulic end assembly, this application also discloses a pump, which includes the above-described hydraulic end assembly.

[0068] Optionally, the pump may also include a power end assembly 30, the power output end of which is connected to the plunger 12 to drive the plunger 12 to reciprocate.

[0069] In addition, the pump may also include a connecting plate 20, which is fixed to the power end assembly 30, and multiple hydraulic end modules 10 are respectively fastened to the connecting plate 20 to ensure the installation stability of each hydraulic end module 10.

[0070] 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 hydraulic end assembly, characterized in that, include: Multiple hydraulic end modules (10) arranged side by side along the first direction; Each of the hydraulic end modules (10) includes a hydraulic end housing (11), a plunger (12), a valve seat (13), and a valve assembly; The hydraulic end housing (11) includes a valve box (111) and a packing box (112). The packing box (112) is detachably disposed in the valve box (111). The valve box (111) is provided with a main channel (1111), and the packing box (112) is provided with a plunger channel (11211) communicating with the main channel (1111). The plunger (12) is movably disposed in the plunger channel (11211) and can be moved into or out of the main channel (1111). The main channel (1111) is used to accommodate the valve seat (13) and the valve assembly.

2. The hydraulic end assembly according to claim 1, characterized in that, The valve box (111) is provided with a threaded hole (1112) on one side, and the threaded hole (1112) is coaxially arranged with the main channel (1111); One end of the packing box (112) is threaded to the threaded hole (1112).

3. The hydraulic end assembly according to claim 1, characterized in that, The hydraulic end module (10) also includes a plurality of fasteners (14), which are distributed circumferentially around the outer periphery of the plunger channel (11211) along the packing box (112) and fasten the packing box (112) to one side of the valve box (111).

4. The hydraulic end assembly according to claim 2 or 3, characterized in that, The hydraulic end module (10) also includes a sealing sleeve (15); The main channel (1111) has a first annular sealing surface (1113) at one end near the packing box (112), and one end of the sealing sleeve (15) is sealed between the plunger (12) and the first annular sealing surface (1113); and / or, The plunger channel (11211) has a second annular sealing surface (11212) at one end near the valve box (111), and the other end of the sealing sleeve (15) is sealed between the plunger (12) and the second annular sealing surface (11212).

5. The hydraulic end assembly according to claim 4, characterized in that, The valve box (111) has a groove (1114) on one side, the first annular sealing surface (1113) and the main channel (1111) are respectively located at the bottom of the groove (1114), and / or, the packing box (112) has a groove (1114) on one side, the second annular sealing surface (11212) and the plunger channel (11211) are respectively located at the bottom of the groove (1114); The outer wall of the sealing sleeve (15) is provided with an annular protrusion (151), which is embedded in the groove (1114).

6. The hydraulic end assembly according to any one of claims 1 to 3, characterized in that, Each valve box (111) is provided with a plurality of main channels (1111) arranged side by side along the first direction. The hydraulic end housing (11) includes a plurality of packing boxes (112), which are detachably disposed in the valve box (111), and the plunger channels (11211) of the plurality of packing boxes (112) are connected to the plurality of main channels (1111) in a one-to-one correspondence.

7. The hydraulic end assembly according to claim 1, characterized in that, The hydraulic end module (10) also includes a first sealing ring (161) and a second sealing ring (162). The first sealing ring (161) and the second sealing ring (162) are respectively sealed and connected between the valve seat (13) and the inner wall of the main channel (1111), and along the axial direction of the hydraulic end module (10), the first sealing ring (161) and the second sealing ring (162) are respectively located on both sides of the liquid inlet channel of the valve box (111).

8. The hydraulic end assembly according to claim 1, characterized in that, The hydraulic end module (10) further includes a discharge cover (171) and a discharge cap (172). The discharge cover (171) is sealed at the end of the main channel (1111) away from the packing box (112). The discharge cap (172) is detachably provided on the main channel (1111) and presses the discharge cover (171) tightly. The hydraulic end module (10) includes a second sealing ring (162) and a third sealing ring (163). The second sealing ring (162) is sealed between the valve seat (13) and the inner wall of the main channel (1111). The third sealing ring (163) is sealed between the discharge cap (171) and the inner wall of the main channel (1111). The second sealing ring (162) and the third sealing ring (163) are located on both sides of the liquid outlet channel of the valve box (111).

9. The hydraulic end assembly according to claim 1, characterized in that, The packing box (112) includes a packing box body (1121), a packing assembly (1122), and a packing cap (1123). The packing box body (1121) is provided with the plunger channel (11211), and the packing assembly (1122) is sealed between the inner wall of the plunger channel (11211) and the outer wall of the plunger (12). The packing box body (1121) is an integral structure or a split structure. The packing cap (1123) is sleeved on the outside of the plunger (12) and threadedly connected to the packing box body (1121), and the end of the packing cap (1123) presses against the packing assembly (1122).

10. The hydraulic end assembly according to claim 9, characterized in that, The packing box body (1121) has a lubricating oil hole (11213) on its side wall. The lubricating oil hole (11213) extends from the outer periphery of the packing box body (1121) toward the plunger channel (11211) and communicates with the plunger channel (11211), and the lubricating oil hole (11213) is correspondingly provided with the packing assembly (1122).

11. A pump, characterized in that, Includes the hydraulic end assembly as described in any one of claims 1 to 10.

Images