Packing box, fluid end and pump

Abstract

The utility model discloses a packing box, a fluid end and a pump, and relates to the fields of oil gas, mines and the like. A packing box comprises a packing box body, a packing assembly and a packing pressing cap. The packing box comprises a packing box body, the packing box body comprises a first end face, a second end face and a peripheral face, the first end face and the second end face are arranged at the two ends of the packing box body respectively in the axis direction of the packing box body, and the peripheral face is connected between the first end face and the second end face and arranged in the circumferential direction of the packing box body. The packing box body is provided with a plunger channel used for installing a packing assembly, and the plunger channel extends in the axis direction of the packing box body and penetrates through the first end face and the second end face. At least part of the packing pressing cap is detachably connected to the end, close to the first end face, of the plunger channel. The problem that the whole valve box integrated structure is repaired or scrapped after the inner wall of the packing cavity is abraded 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 packing box, hydraulic end and pump. Background Technology

[0002] In some plunger pumps in related technologies, the valve box and packing assembly at the hydraulic end are an integrated structure. That is, the valve box has a packing cavity, and the plunger is movably installed in the packing cavity. As the plunger reciprocates, it causes wear on the inner wall of the packing cavity, which leads to the need for repair or scrapping of the entire integrated valve box structure, seriously affecting work efficiency and construction costs. Utility Model Content

[0003] The purpose of this application is to provide a packing box, hydraulic end and pump that can solve the problem of the entire valve box integrated structure being reworked or scrapped due to wear of the inner wall of the packing cavity.

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

[0005] This application provides a packing box, including: a packing box body, a packing assembly, and a packing cap;

[0006] The packing box body includes a first end face, a second end face, and an outer peripheral surface. Along the axial direction of the packing box body, the first end face and the second end face are respectively located at both ends of the packing box body. The outer peripheral surface connects the first end face and the second end face and is arranged along the circumference of the packing box body.

[0007] The packing box body is provided with a plunger channel for installing packing components. The plunger channel extends along the axial direction of the packing box body and passes through the first end face and the second end face respectively.

[0008] At least a portion of the packing cap is detachably connected to one end of the plunger channel near the first end face.

[0009] This application embodiment also provides a hydraulic end, including: a valve box, a plunger, and the packing box described above;

[0010] The valve box is provided with a main channel, the packing box is located on the side of the valve box, and the plunger channel is aligned with and connected to the main channel;

[0011] The plunger is movably disposed within the plunger channel and the main channel, and the packing assembly is sealingly connected between the inner wall of the plunger channel and the outer wall of the plunger.

[0012] This application also provides a pump, including the hydraulic end described above.

[0013] In this embodiment, a packing box is set separately, making it independent of the valve box. A plunger is installed through the plunger channel of the packing box, and the plunger and the plunger channel are sealed by the packing assembly. The packing assembly is limited by the packing cap, which can ensure the sealing between the plunger and the packing box, and can also repair or replace the packing assembly separately after the inner wall of the plunger channel is worn, without having to repair or replace the valve box. This reduces the difficulty and efficiency of repair or replacement, improves work efficiency, and reduces costs. Attached Figure Description

[0014] Figure 1 This is a partial cross-sectional schematic diagram of the hydraulic end disclosed in an embodiment of this application;

[0015] Figure 2 This is a partial cross-sectional schematic diagram of the valve box and packing box disclosed in the embodiments of this application;

[0016] Figure 3 This is a cross-sectional schematic diagram of the packing box body disclosed in the embodiments of this application;

[0017] Figure 4 This is a first structural schematic diagram of the packing box body disclosed in an embodiment of this application;

[0018] Figure 5 This is a schematic diagram of the second structure of the packing box body disclosed in the embodiments of this application.

[0019] Explanation of reference numerals in the attached figures:

[0020] 10-Packaging box;

[0021] 11-Packing box body; 111-First end face; 112-Second end face; 113-Outer peripheral surface; 114-Plunger channel; 114a-First channel section; 114b-Second channel section; 114c-Stepped structure; 114d-Annular sealing surface; 115-Lubricating oil passage; 116-Lifting hole; 117-Fastening hole; 118-Counterpart groove; 119-Positioning hole;

[0022] 12-Packing assembly;

[0023] 13-Packing cap;

[0024] 20-Valve box; 21-Main channel; 30-Plunger; 40-Fastener. Detailed Implementation

[0025] 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.

[0026] 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.

[0027] The embodiments of this application will be described in detail below with reference to the accompanying drawings and specific examples and application scenarios.

[0028] refer to Figures 1 to 5 This application discloses a packing box 10, which can be applied to the hydraulic end. The disclosed packing box 10 includes a packing box body 11, a packing assembly 12, and a packing cap 13.

[0029] The packing box body 11 is a basic component that provides an installation base for components such as the packing assembly 12 and the packing cap 13. The packing box body 11 may include a first end face 111, a second end face 112, and an outer peripheral surface 113. Along the axial direction of the packing box body 11, the first end face 111 and the second end face 112 are respectively located at both ends of the packing box body 11, and the outer peripheral surface 113 connects the first end face 111 and the second end face 112 and is arranged along the circumference of the packing box body 11.

[0030] Optionally, the packing box body 11 can be a columnar structure, such as a cylindrical structure, an elliptical cylinder structure, a prism structure, etc.; of course, the packing box body 11 can also be a columnar structure with a certain taper, that is, a frustum structure, such as a frustum of a cone structure, an elliptical frustum structure, a prism structure, etc. In addition, the packing box body 11 can also be other shapes, which are not specifically limited here.

[0031] The packing box body 11 is provided with a plunger channel 114, which extends along the axial direction of the packing box body 11 and passes through the first end face 111 and the second end face 112 respectively, for mounting the packing assembly 12. In addition, the plunger channel 114 can also be used to accommodate the plunger 30, and the plunger 30 can reciprocate along the plunger channel 114 to pressurize or release the fluid.

[0032] Optionally, the packing assembly 12 is fitted onto the outside of the plunger 30 and can seal the space between the outer wall of the plunger 30 and the inner wall of the plunger channel 114, thereby effectively preventing fluid leakage caused by gaps between the plunger 30 and the plunger channel 114. Exemplarily, the packing assembly 12 may include packing, a spacer ring, a pressure ring, an oil ring, and other components. Of course, other forms are also possible, and no specific limitation is made here.

[0033] At least a portion of the packing gland cap 13 is detachably connected to one end of the plunger channel 114 near the first end face 111. In this way, at least a portion of the packing gland cap 13 can be installed into the plunger channel 114 from the direction of the first end face 111, and the packing assembly 12 is pressed by the end face of the packing gland cap 13 located in the plunger channel 114. This limits the packing assembly 12 in the axial direction, preventing the packing assembly 12 from moving along the axial direction under the reciprocating motion of the plunger 30, thus ensuring the stability of the packing assembly 12.

[0034] In addition, the packing gland cap 13 is detachably connected to the packing gland box body 11, which facilitates the disassembly and assembly of the packing gland cap 13, thereby making it easier to maintain or replace the packing gland assembly 12, and also helps to improve the efficiency of maintenance or replacement of the plunger 30.

[0035] Optionally, the packing gland cap 13 and the packing gland box body 11 can be connected by threads, snap-fit, fasteners, etc. Of course, other connection methods can also be used, which are not specifically limited here.

[0036] Based on the above configuration, in this embodiment, a packing box 10 is separately provided, making the packing box 10 independent of the valve box 20. A plunger 30 is installed through the plunger channel 114 of the packing box 10. The plunger 30 and the plunger channel 114 are sealed by the packing assembly 12. The packing assembly 12 is limited by the packing cap 13. This ensures the sealing between the plunger 30 and the packing box 10, and allows the packing assembly 12 to be repaired or replaced separately after the inner wall of the plunger channel 114 is worn, without the need to repair or replace the valve box 20. This reduces the difficulty and efficiency of repair or replacement, improves work efficiency, and reduces costs.

[0037] In some embodiments, the plunger channel 114 may include a first channel segment 114a and a second channel segment 114b. One end of the first channel segment 114a penetrates a first end face 111, and the other end of the first channel segment 114a is connected to the second channel segment 114b. The end of the second channel segment 114b facing away from the first channel segment 114a penetrates a second end face 112. Furthermore, the cross-sectional area of ​​the first channel segment 114a perpendicular to the axis of the packing box body 11 is larger than the cross-sectional area of ​​the second channel segment 114b perpendicular to the axis of the packing box body 11, and a stepped structure 114c is formed at the junction of the first channel segment 114a and the second channel segment 114b.

[0038] Based on the above configuration, the packing cap 13 can be installed through the first channel section 114a, and the end face of the packing cap 13 can be limited by the stepped structure 114c to prevent over-installation of the packing cap 13. Furthermore, the outer wall of the plunger 30 can mate with the inner wall of the second channel section 114b to ensure that the plunger 30 does not easily wobble within the plunger channel 114, thus improving the stability of the plunger 30's reciprocating movement.

[0039] Optionally, the packing assembly 12 can be disposed in the second channel section 114b to seal between the inner wall of the second channel section 114b and the outer wall of the plunger 30. Of course, the end of the packing assembly 12 can also extend into the first channel section 114a to facilitate compression of the packing assembly 12 by the end of the packing cap 13, thereby ensuring the stability of the packing assembly 12.

[0040] For example, the step structure 114c has a step surface that can be perpendicular to the axial direction of the packing box body 11. Of course, the extension direction of the step surface can also be at an acute angle to the axial direction, that is, the step surface is an inclined surface.

[0041] In some embodiments, the inner wall of the second channel segment 114b may be provided with an annular sealing surface 114d, which extends circumferentially along the plunger channel 114 and is located at one end of the second channel segment 114b opposite to the first channel segment 114a, for sealing the sealing sleeve in both the radial and circumferential directions. Based on this arrangement, a sealing sleeve can be installed at the annular sealing surface 114d to achieve a sealing effect between the outer wall of the plunger 30 and the inner wall of the second channel segment 114b, effectively preventing fluid leakage between the plunger 30 and the packing box body 11.

[0042] Optionally, the annular sealing surface 114d can be a conical surface structure, or it can be a cylindrical surface structure. The form of the annular sealing surface 114d is not specifically limited here.

[0043] To achieve a detachable connection between the packing gland cap 13 and the packing box body 11, the first channel section 114a may be provided with internal threads, and correspondingly, the packing gland cap 13 may be provided with external threads, allowing the packing gland cap 13 and the packing box body 11 to be connected through the mating of internal and external threads. Based on this, the installation stability of the packing gland cap 13 can be ensured, while also facilitating its disassembly and assembly, thereby simplifying the maintenance or replacement of the packing assembly 12 and the plunger 30.

[0044] In some embodiments, the packing box body 11 may also be provided with a lubricating oil passage 115, one end of which penetrates the outer peripheral surface 113 and the other end of which penetrates the inner wall of the plunger channel 114. In this way, lubricating oil or grease can be introduced into the plunger channel 114 through the lubricating oil passage 115 to achieve lubrication between the plunger 30 and the plunger channel 114.

[0045] Optionally, the other end of the lubricating oil passage 115 can be correspondingly provided with the packing assembly 12, so that lubricating oil or grease can be injected into the packing assembly 12, so that the lubricating oil or grease can be evenly applied to the outer wall of the plunger 30 through the packing assembly 12, thereby improving the lubrication effect on the plunger 30.

[0046] In some embodiments, the outer peripheral surface 113 of the packing box body 11 may be provided with a lifting hole 116, which extends toward the plunger channel 114. Thus, when it is necessary to disassemble or assemble the packing box body 11, a lifting tool can be installed in the lifting hole 116 to facilitate the lifting operation of the packing box body 11, thereby facilitating the disassembly and assembly of the packing box body 11.

[0047] Optionally, the lifting hole 116 can be a threaded hole. Correspondingly, the lifting tool can be equipped with a screw, which, through the engagement of the screw and the threaded hole, enables quick assembly and disassembly of the lifting tool and the packing box body 11. Of course, the lifting hole 116 can also be a stepped hole, in which the lifting tool can be snapped or hooked to facilitate the lifting of the packing body.

[0048] In some embodiments, the packing box body 11 may also be provided with multiple fastening holes 117 for installing fasteners 40. These fastening holes 117 are arranged circumferentially around the outer periphery of the plunger channel 114, and each fastening hole 117 extends along the axial direction of the packing box body 11. Based on this, fasteners 40 can be installed in each fastening hole 117 and then installed to the valve box 20 at the hydraulic end, thereby achieving stable installation of the packing box body 11 and the valve box 20, and facilitating the assembly and disassembly of the packing box body 11.

[0049] Optionally, the multiple fastening holes 117 can be evenly arranged along the circumference of the packing box body 11 to improve the uniformity of the force on the packing box body 11; of course, they can also be unevenly distributed, as long as the stability of the packing box body 11 can be guaranteed.

[0050] Considering that after the fastener 40 is installed into the fastening hole 117, the end cap of the fastener 40 is located outside the first end face 111 of the packing box body 11, making the fastener 40 easily accessible and affecting its appearance, in this embodiment of the application, the first end face 111 may be provided with a plurality of recesses 118. The plurality of recesses 118 are arranged circumferentially around the plunger channel 114 along the periphery of the packing box body 11, and each recess 118 has a fastening hole 117 at its bottom.

[0051] Based on the above settings, when the fastener 40 is installed into the fastening hole 117, the end cap of the fastener 40 can be embedded in the recess 118, so that the end cap of the fastener 40 will not be exposed, thereby preventing the fastener 40 from being touched, and also improving the appearance.

[0052] In some embodiments, the packing box body 11 may also be provided with a positioning hole 119, which extends from the second end face 112 along the axial direction of the packing box body 11; correspondingly, the side of the valve box 20 at the hydraulic end may be provided with a positioning protrusion. Based on this, when the packing box 10 is installed on the side of the valve box 20, the second end face 112 of the packing box body 11 can fit against the side of the valve box 20, and the positioning protrusion can cooperate with the positioning hole 119, thereby achieving the positioning of the packing box 10 and ensuring the assembly accuracy of the packing box 10 and the valve box 20.

[0053] Based on the packing box 10 described above, this application also discloses a hydraulic end, which includes a valve box 20, a plunger 30, and the packing box 10 described above. The valve box 20 may be provided with a main channel 21, which can be used to accommodate structures such as an intake valve assembly, an exhaust valve assembly, and a valve seat. It can also provide space for the plunger 30.

[0054] The packing box 10 is located on the side of the valve box 20, and the plunger channel is aligned with and connected to the main channel 21. The plunger 30 is movably inserted through the plunger channel 114 and the main channel 21, so that fluid can be drawn into the main channel 21 and the pressurized fluid can be discharged through the reciprocating movement of the plunger 30. Of course, during this process, the suction valve assembly, discharge valve assembly, etc. can be opened or closed periodically to adapt to the reciprocating movement of the plunger 30.

[0055] The packing assembly 12 is sealed between the inner wall of the plunger channel 114 and the outer wall of the plunger 30, thus effectively preventing fluid leakage caused by gaps between the outer wall of the plunger 30 and the inner wall of the plunger channel 114.

[0056] Based on the aforementioned hydraulic end, this application also discloses a pump, which includes the aforementioned hydraulic end.

[0057] 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 packing box, characterized in that, include: Packing box body (11), packing assembly (12) and packing cap (13). The packing box body (11) includes a first end face (111), a second end face (112), and an outer peripheral surface (113). Along the axial direction of the packing box body (11), the first end face (111) and the second end face (112) are respectively located at both ends of the packing box body (11). The outer peripheral surface (113) connects the first end face (111) and the second end face (112) and is arranged along the circumference of the packing box body (11). The packing box body (11) is provided with a plunger channel (114) for installing the packing assembly (12). The plunger channel (114) extends along the axial direction of the packing box body (11) and passes through the first end face (111) and the second end face (112) respectively. At least part of the packing cap (13) is detachably connected to one end of the plunger channel (114) near the first end face (111).

2. The packer as defined in claim 1, wherein The plunger channel (114) includes a first channel section (114a) and a second channel section (114b). One end of the first channel segment (114a) extends through the first end face (111), and the other end of the first channel segment (114a) is connected to the second channel segment (114b). The end of the second channel segment (114b) that is opposite to the first channel segment (114a) extends through the second end face (112). The cross-sectional area of ​​the first channel segment (114a) perpendicular to the axis of the packing box body (11) is greater than the cross-sectional area of ​​the second channel segment (114b) perpendicular to the axis of the packing box body (11), and a stepped structure (114c) is formed at the junction of the two.

3. The packer as defined in claim 2, wherein The inner wall of the second channel segment (114b) is provided with an annular sealing surface (114d) extending circumferentially along the plunger channel (114). The annular sealing surface (114d) is located at one end of the second channel segment (114b) opposite to the first channel segment (114a) and is used to seal the sealing sleeve in the radial and circumferential directions.

4. The packer as defined in claim 2, wherein The first channel section (114a) is provided with an internal thread, and the packing cap (13) is provided with an external thread. The packing cap (13) and the packing box body (11) are connected by the mating of the internal thread and the external thread.

5. The packer as defined in claim 1, wherein The packing box body (11) is also provided with a lubricating oil channel (115), one end of which penetrates the outer peripheral surface (113), and the other end of which penetrates the inner wall of the plunger channel (114).

6. The packer as defined in claim 1, wherein The outer peripheral surface (113) of the packing box body (11) is provided with a lifting hole (116), which extends toward the plunger channel (114).

7. The packer as defined in claim 1, wherein The packing box body (11) is also provided with a plurality of fastening holes (117) for installing fasteners (40). The plurality of fastening holes (117) are provided on the outer periphery of the plunger channel (114) along the circumference of the packing box body (11), and each fastening hole (117) extends along the axial direction of the packing box body (11).

8. The packer as defined in claim 7, wherein The first end face (111) is provided with a plurality of grooves (118), and the plurality of grooves (118) are provided on the outer periphery of the plunger channel (114) along the circumferential direction of the packing box body (11); Each of the sinks (118) has a fastening hole (117) at the bottom.

9. The packer as defined in claim 1, wherein The packing box body (11) is also provided with a positioning hole (119), which extends from the second end face (112) along the axial direction of the packing box body (11).

10. A fluid end characterized by, include: Valve box (20), plunger (30) and packing box (10) as described in any one of claims 1 to 9; The valve box (20) is provided with a main channel (21), the packing box (10) is located on the side of the valve box (20), and the plunger channel (114) is aligned with and connected to the main channel (21); The plunger (30) is movably inserted through the plunger channel (114) and the main channel (21), and the packing assembly (12) is sealed between the inner wall of the plunger channel (114) and the outer wall of the plunger (30).

11. A pump characterized by Includes the hydraulic end as described in claim 10.

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