Stud split hydraulic end pump head of butt joint type plunger rod

Abstract

The invention discloses a stud split hydraulic end pump head of a butt joint type plunger rod, and belongs to the technical field of plunger pumps, the stud split hydraulic end pump head of the butt joint type plunger rod comprises a pump head, a pump body is detachably connected to the side of the pump head, a plunger rod set is arranged in the pump head and the pump body in a matched mode, and the plunger rod set comprises a first rod body and a second rod body which are detachably connected; a third rod body is arranged at the end part of the second rod body; one end of the second rod body is connected with the first rod body, the other end of the second rod body is connected with the third rod body, the outer diameter of the second rod body is equal to that of the first rod body, the outer diameter of the third rod body is smaller than that of the second rod body, and the third rod body is used for ensuring that the assembled plunger rod set axially moves relative to the pump head and the pump body. The production requirements are met, the maintenance cost is reduced, the stable assembly precision can be kept in the repeated disassembly and assembly use process, and the medium conveying precision is high.

Description

Technical Field

[0001] The invention relates to the technical field of plunger pumps, and in particular to a stud-split hydraulic end pump head of a docking-type plunger rod. Background Art

[0002] At present, the industry usually adopts an integrated pump unit, in which the pump body and the pump head are fixedly connected. The plunger pump is difficult to disassemble and install. The process of disassembling and installing the plunger pump is time-consuming and labor-intensive, and the labor cost is high.

[0003] For industries such as food and medicine that require high disinfection and washing, after the equipment is shut down or production is adjusted, the plunger pump that is in direct contact with the material needs to be thoroughly disinfected before it is put back into use. At this time, the pump body and pump head are fixed, and the pump head and pump body cannot be disassembled at will. It is difficult to disinfect and wash the internal parts of the pump head and pump body. Different materials are transported by different plunger pumps, which greatly increases production costs. At the same time, a single pump head can only be fixed in a flow range. For customers who require a wide range of flow rates during the production process, different plunger pumps need to be replaced for different flow rates, and the equipment procurement cost is high.

[0004] The prior art CN103410721B plunger pump hydraulic end device includes a pump head body, a cartridge combination valve, a packing box and a plunger. The pump head body is provided with a suction port and a discharge port. The cartridge combination valve is arranged in the pump head body. A liquid inlet cavity connected to the suction port and a liquid discharge cavity connected to the discharge port are formed between the pump head body and the cartridge combination valve. The end face of the packing box is close to the pump head body, and the plunger can reciprocate in the packing box. The cartridge combination valve includes a compression sleeve, a valve core, a suction valve and a discharge valve. The prior art uses a packing box to clamp and fix the assembly formed by the pump head body and the cartridge combination valve, but the prior art has a large room for improvement, specifically in terms of assembly and combination of the plunger pump and the plunger rod and improvement of disassembly efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide a stud-split hydraulic end pump head for a docking plunger rod, which optimizes the disassembly process, quickly disassembles and assembles the plunger pump, meets production needs and reduces maintenance costs. The device can maintain stable assembly accuracy and high medium delivery accuracy during repeated disassembly and assembly.

[0006] In order to solve the above technical problems, the present invention specifically provides the following technical solutions: a stud-split hydraulic end pump head with a docking plunger rod, comprising a pump head, a pump body detachably connected to the side of the pump head, a plunger rod group cooperating with the pump head and the pump body, the plunger rod group comprising a first rod body and a second rod body detachably connected, a third rod body being arranged at the end of the second rod body; one end of the second rod body is connected to the first rod body, and the other end of the second rod body is connected to the third rod body, the second rod body and the first rod body have the same outer diameter, and the third rod body has a smaller outer diameter than the second rod body, so as to ensure the axial movement of the assembled plunger rod group relative to the pump head and the pump body.

[0007] The second rod body and the third rod body are connected by plugging to ensure the coaxiality of the two.

[0008] The plunger rod assembly can move axially relative to the pump head and the pump body.

[0009] The present invention reduces the overall processing difficulty of the plunger pump by arranging the pump head and the pump body to be detachably connected, and can realize the rapid disassembly, assembly and replacement of the pump head and the pump body during the use of the plunger pump, meet the production needs and reduce the maintenance cost of parts replacement, further optimize the disassembly and assembly scheme of the pump head and the pump body, and set the plunger rod group to be a detachable structure to provide more disassembly schemes. More importantly, the detachable first rod body and the second rod body, as well as the third rod body provided at the end of the second rod body can shorten the moving distance of the pump head relative to the pump body along the axial direction of the plunger rod group during the separation of the pump head and the pump body, thereby reducing the disassembly difficulty and improving the speed of the material replacement process. In addition, through the disassembly scheme of the pump head and the pump body and the detachable scheme of the plunger rod group, the assembly accuracy of the internal parts of the plunger pump can be corrected or adjusted during the assembly process, and the gaps at the assembly interfaces of the above-mentioned parts can be used to accommodate or collect the wear particles of the equipment operation part, thereby solving the problem of the influence of the particles generated by wear during the operation of the plunger pump on the operation of the parts, and ensuring that the device can maintain stable assembly accuracy during repeated disassembly and use.

[0010] According to an embodiment of the present invention, the end surface of the first rod body has a first slot, and the second rod body has an extension rod assembled with the first slot, and the length of the extension rod is less than or equal to the depth of the first slot.

[0011] The plug-in assembly method of the first slot and the extension rod makes it easy for the first rod body and the second rod body to move away from each other as the pump head and the pump body are separated. The pump head and the pump body, the first rod body and the second rod body can be disassembled synchronously without performing other operations, thereby improving the disassembly efficiency when the conveying medium is replaced or the machine is shut down, optimizing the disassembly process, and lowering the operating threshold.

[0012] According to one embodiment of the present invention, the first rod body has a first hole body, and the extension rod has a second hole body. When the first rod body and the second rod body are plugged in, the positions of the first hole body and the second hole body correspond to each other, that is, overlap, and the two are connected by a second fastener. In this way, the positions of the first hole body and the second hole body can be observed through the mounting hole provided on the side of the pump body, and the second fastener can be assembled with the first hole body and the second hole body through the mounting hole. In this way, there is no need to completely dismantle the plunger rod group, and the disassembly and assembly of the plunger rod group can be completed when the pump head and the pump body are installed.

[0013] According to one embodiment of the present invention, at least one second slot is provided on the slot wall of the first slot, and the outer side of the extension rod has a first protrusion which is plugged into the second slot. The cooperation scheme of the second slot and the first protrusion can solve the problem of the first rod body rotating relative to the axial direction of the second rod body and realize the rapid assembly of the first rod body and the second rod body, thereby ensuring the coaxiality of the assembly of the first rod body and the second rod body, reducing the collision interference between the first rod body and the second rod body during the movement caused by the deviation of the assembly position, and improving the stability of the medium transportation; while ensuring the coaxial assembly of the first rod body and the second rod body, it helps to improve the straightness of the overall movement of the plunger rod group in the pump head, thereby improving the oil film characteristics of the plunger rod group at the position where the plunger rod group contacts the pump head and the medium of the pump head.

[0014] According to one embodiment of the present invention, the pump head has a built-in first chamber and a channel for assembling a plunger rod group, the channel is connected to the first chamber, and the plunger rod group can enter and exit the channel; the third rod body can enter and exit the first chamber, and is used to realize the normal operation of the plunger pump, and the pressure inside the first chamber is controlled by the plunger rod group entering and exiting the channel relative to realize the medium transportation inside the first chamber.

[0015] The pump body has an assembly hole that is coaxially connected to the channel and is used to assemble the plunger rod group. A mounting hole that is connected to the assembly hole is opened on the side of the pump body, and the mounting hole is perpendicular to the axis of the assembly hole. The mounting hole can be used to observe whether the first hole body and the second hole body correspond to each other, and operate the second fastener to assemble the first hole body and the second hole body, so as to realize the disassembly and assembly of the first rod body and the second rod body when the plunger pump is not disassembled, and shorten the movement distance of the pump head relative to the pump body along the axis direction of the plunger rod group during the separation process of the pump head and the pump body.

[0016] According to one embodiment of the present invention, the pump body includes a main pump body and an auxiliary pump body that can be detachably assembled. There are coaxial through holes between the main pump body, the auxiliary pump body and the pump head. The auxiliary pump body is arranged between the main pump body and the pump head. The pump head is arranged as a detachable main pump body and auxiliary pump body to meet production and use requirements and reduce maintenance costs. A through hole is arranged between the main pump body, the auxiliary pump body and the pump head to realize the assembly of the three.

[0017] According to one embodiment of the present invention, a first fastener is built into the through hole, one end of the first fastener is placed in the through hole of the main pump body and fixed to the main pump body, and the other end of the first fastener is placed outside the pump head and is equipped with a nut. The first fastener is located in the through hole of the auxiliary pump body and is a bare rod. The clamping force between the main pump body, the auxiliary pump body and the pump head is adjusted by rotating the nut to ensure the assembly reliability of the three and to use the first fastener to correct the assembly alignment accuracy of the main pump body, the auxiliary pump body and the pump head. The nut is preferably a butterfly nut, so that it can be disassembled and assembled by hand, reducing the probability of using tools and reducing the workload of further disinfecting tools and contact parts due to the use of tools.

[0018] According to one embodiment of the present invention, at least two through holes are provided to ensure the tightness and precision of the assembly of the main pump body, the auxiliary pump body and the pump head.

[0019] According to one embodiment of the present invention, a snap-on assembly is provided between the main pump body and the auxiliary pump body, and the snap-on assembly includes a snap-on groove body opened on the main pump body, and a snap-on block arranged on the auxiliary pump body. The snap-on block is assembled corresponding to the snap-on groove. The snap-on assembly is utilized to ensure that the through holes on the main pump body, the auxiliary pump body and the pump head correspond to each other, thereby realizing rapid and accurate assembly of the main pump body and the auxiliary pump body and reducing contact wear between the two.

[0020] Compared with the prior art, the present invention has the following beneficial effects: the present invention reduces the overall processing difficulty of the plunger pump by arranging the pump head and the pump body to be detachably connected, and can realize the rapid disassembly, assembly and replacement of the pump head and the pump body during the use of the plunger pump, thereby meeting the production needs and reducing the maintenance cost of parts replacement. The disassembly and assembly scheme of the pump head and the pump body is further optimized by arranging the plunger rod group to be a detachable structure, providing more disassembly schemes. More importantly, the detachable first rod body and the second rod body, and the third rod body provided at the end of the second rod body can shorten the moving distance of the pump head relative to the pump body along the axial direction of the plunger rod group during the separation of the pump head and the pump body, thereby reducing the difficulty of disassembly and improving the speed of the material replacement process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0022] Figure 1 It is a schematic diagram of a stud-split hydraulic end pump head of a docking-type plunger rod of the present invention; Figure 2 It is a side view of a stud-split hydraulic end pump head of a docking-type plunger rod of the present invention; Figure 3 for Figure 2 Section view in the AA direction; Figure 4 for Figure 2 Cross-sectional view in the middle BB direction; Figure 5 A top view of the plunger rod assembly of the present invention; Figure 6 for Figure 5 Cross-sectional view in CC direction; Figure 7 It is a schematic diagram of the structural scheme of the plunger rod assembly of the present invention; Figure 8 It is a schematic diagram of the disassembly of the plunger rod assembly of the present invention; Fig. 9 It is a schematic diagram of the assembly structure of the first rod body and the second rod body of the present invention.

[0023] Description of reference numerals: 10. Pump head; 11. Nut; 12. First chamber; 13. First fastener; 20. Pump body; 21. Main pump body; 22. Auxiliary pump body; 23. Mounting hole; 24. Snap-fit ​​assembly; 30. Plunger rod assembly; 31. First rod body; 32. Second rod body; 33. Third rod body; 34. Extension rod; 35. Second fastener; 36. First hole body; 37. First slot; 38. First protrusion; 39. Second slot; 40. Seal. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The following first describes the concepts involved in the present application in conjunction with the accompanying drawings. It should be noted that the following description of each concept is only to make the content of the present application easier to understand, and does not limit the scope of protection of the present application; at the same time, the embodiments and features in the embodiments of the present application can be combined with each other in the absence of conflict. The present application will be described in detail with reference to the accompanying drawings and in conjunction with the embodiments.

[0026] Embodiment 1 like Figure 1-Figure 3 , Figure 5-Figure 6As shown, a stud-split hydraulic end pump head with a docking plunger rod comprises a pump head 10, a pump body 20 is detachably connected to the side of the pump head 10, a plunger rod group 30 is cooperatively arranged in the pump head 10 and the pump body 20, the plunger rod group 30 comprises a first rod body 31 and a second rod body 32 which are detachably connected, a third rod body 33 is arranged at the end of the second rod body 32; one end of the second rod body 32 is connected to the first rod body 31, and the other end of the second rod body 32 is connected to the third rod body 33, the outer diameter of the second rod body 32 is the same as that of the first rod body 31, and the outer diameter of the third rod body 33 is smaller than that of the second rod body 32, so as to ensure the axial movement of the assembled plunger rod group 30 relative to the pump head 10 and the pump body 20.

[0027] The second rod body 32 and the third rod body 33 are connected by plugging to ensure the coaxiality of the two.

[0028] The plunger rod assembly 30 can move axially relative to the pump head 10 and the pump body 20 .

[0029] The present invention reduces the overall processing difficulty of the plunger pump by arranging the pump head 10 and the pump body 20 to be detachably connected. The pump head 10 and the pump body 20 can be quickly disassembled and replaced during use of the plunger pump, thereby meeting production needs and reducing the cost of parts replacement and maintenance. The disassembly and assembly scheme of the pump head 10 and the pump body 20 is further optimized, and the plunger rod group 30 is arranged as a detachable structure to provide more disassembly schemes. More importantly, the detachable first rod body 31 and the second rod body 32, and the third rod body 33 provided at the end of the second rod body 32 can shorten the separation of the pump head 10 and the pump body 20. The moving distance of the pump head 10 relative to the pump body 20 along the axial direction of the plunger rod group 30 during the disassembly process reduces the difficulty of disassembly and improves the speed of the material replacement process. In addition, through the disassembly scheme of the pump head 10 and the pump body 20 and the disassembly scheme of the plunger rod group 30, the assembly accuracy of the internal parts of the plunger pump can be corrected or adjusted during the assembly process, and the gaps at the assembly interfaces of the above-mentioned parts are used to accommodate or collect some wear particles of the equipment operation, thereby solving the problem of the influence of particles generated by wear during the operation of the plunger pump on the operation of the parts, and ensuring that the device can maintain stable assembly accuracy during repeated disassembly and assembly.

[0030] like Figure 7-Figure 9 As shown, the end surface of the first rod body 31 has a first slot 37, and the second rod body 32 has an extension rod 34 assembled with the first slot 37. The length of the extension rod 34 is less than or equal to the depth of the first slot 37.

[0031] The plug-in assembly method of the first slot 37 and the extension rod 34 makes it easy for the first rod body 31 and the second rod body 32 to move away from each other as the pump head 10 and the pump body 20 are separated. The pump head 10 and the pump body 20, the first rod body 31 and the second rod body 32 can be disassembled synchronously without performing other operations, thereby improving the disassembly efficiency when the conveying medium is replaced or shut down, optimizing the disassembly process, and lowering the operating threshold.

[0032] The first rod body 31 has a first hole body 36, and the extension rod 34 has a second hole body. When the first rod body 31 and the second rod body 32 are plugged in, the positions of the first hole body 36 and the second hole body correspond to each other, that is, overlap, and the two are connected by a second fastener 35. In this way, the positions of the first hole body 36 and the second hole body can be observed through the mounting hole 23 provided on the side of the pump body 20, and the second fastener 35 can be assembled with the first hole body 36 and the second hole body through the mounting hole 23. In this way, there is no need to completely dismantle the plunger rod group 30, and the plunger rod group 30 can be disassembled and assembled when the pump head 10 and the pump body 20 are installed.

[0033] At least one second slot 39 is provided on the slot wall of the first slot 37, and the outer side of the extension rod 34 has a first protrusion 38 plugged into the second slot 39. The cooperation scheme of the second slot 39 and the first protrusion 38 can solve the problem of the first rod body 31 rotating relative to the axial direction of the second rod body 32 and realize the rapid assembly of the first rod body 31 and the second rod body 32, thereby ensuring the coaxiality of the assembly of the first rod body 31 and the second rod body 3, reducing the collision interference between the first rod body 31 and the second rod body 32 during the movement caused by the deviation of the assembly position, and improving the stability of the medium transportation; while ensuring the coaxial assembly of the first rod body 31 and the second rod body 32, it helps to improve the straightness of the overall movement of the plunger rod group 30 in the pump head 10, thereby improving the oil film characteristics of the plunger rod group 30 at the position where it contacts the medium with the pump head 10 and the pump head 20.

[0034] Embodiment 2: In this embodiment, the pump head 10 has a seal 40 configured with the plunger rod assembly 30 inside, so as to prevent the medium from leaking during the relative movement of the plunger rod assembly 30 .

[0035] In this embodiment, the number of plunger rod groups 30 is at least one, and the specific number is selected according to actual production and use requirements. For example, two plunger rod groups 30 can be a group, and 1 group, 2 groups, 3 groups, 4 groups, 5 groups, 6 groups, 7 groups, 8 groups, 9 groups, 10 groups, 11 groups... are selected according to production requirements.

[0036] Embodiment 3: like Figure 1 Figure 3As shown, the pump head 10 has a built-in first chamber 12 and a channel for assembling a plunger rod group 30. The channel is connected to the first chamber 12, and the plunger rod group 30 can enter and exit the channel; the third rod body 33 can enter and exit the first chamber 12, and is used to realize the normal working operation of the plunger pump. The pressure inside the first chamber 12 is controlled by the plunger rod group 30 entering and exiting the channel relative to realize the medium transportation inside the first chamber 12.

[0037] The pump body 20 has an assembly hole that is coaxially connected to the channel and is used to assemble the plunger rod assembly 30. A mounting hole 23 that is connected to the assembly hole is opened on the side of the pump body 20, and the mounting hole 23 is arranged perpendicular to the axis of the assembly hole. The mounting hole 23 can be used to observe whether the first hole body 36 and the second hole body are correspondingly overlapped, and operate the second fastener 35 to assemble the first hole body 36 and the second hole body, so as to realize the disassembly and assembly of the first rod body 31 and the second rod body 32 when the plunger pump is not disassembled, and shorten the moving distance of the pump head 10 relative to the pump body 20 along the axis direction of the plunger rod assembly 30 during the separation process of the pump head 10 and the pump body 20.

[0038] The pump body 20 includes a main pump body 21 and an auxiliary pump body 22 that are detachably assembled. There are coaxial through holes between the main pump body 21, the auxiliary pump body 22 and the pump head 10. The auxiliary pump body 22 is arranged between the main pump body 21 and the pump head 10. The pump head 20 is configured as a detachable main pump body 21 and auxiliary pump body 22 to meet production and use requirements and reduce maintenance costs. Through holes are arranged between the main pump body 21, the auxiliary pump body 22 and the pump head 10 to realize the assembly of the three.

[0039] like Figure 4 As shown, a first fastener 13 is built into the through hole, one end of the first fastener 13 is placed in the through hole of the main pump body 21 and fixed to the main pump body 21, and the other end of the first fastener 13 is placed outside the pump head 10 and is equipped with a nut 11. The first fastener 13 is located in the through hole of the auxiliary pump body 22, and the portion is a bare rod. The clamping force between the main pump body 21, the auxiliary pump body 22 and the pump head 10 is adjusted by rotating the nut 11 to ensure the assembly reliability of the three and to use the first fastener 13 to correct the assembly alignment accuracy of the main pump body 21, the auxiliary pump body 22 and the pump head 10. The nut 11 is preferably a butterfly nut, so that it can be disassembled and assembled by hand, reducing the probability of using tools and reducing the workload of further disinfecting tools and contact parts due to the use of tools.

[0040] At least two through holes are provided to ensure the tightness and precision of the assembly of the main pump body 21 , the auxiliary pump body 22 and the pump head 10 .

[0041] A snap-fit ​​assembly 24 is provided between the main pump body 21 and the auxiliary pump body 22. The snap-fit ​​assembly 24 includes a snap-fit ​​groove body opened on the main pump body 21, and a snap-fit ​​block arranged on the auxiliary pump body 22. The snap-fit ​​block is assembled corresponding to the snap-fit ​​groove. The snap-fit ​​assembly 24 is utilized to ensure that the through holes on the main pump body 21, the auxiliary pump body 22 and the pump head 10 correspond to each other, thereby realizing rapid and accurate assembly of the main pump body 21 and the auxiliary pump body 22 and reducing contact wear between the two.

[0042] The embodiments and / or implementation methods described above are only used to illustrate the preferred embodiments and / or implementation methods for realizing the technology of the present invention, and are not intended to limit the implementation methods of the technology of the present invention in any form. Any technical personnel in this field may make slight changes or modifications to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present invention, but they should still be regarded as technologies or embodiments that are essentially the same as the present invention. This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the invention to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A stud-split hydraulic end pump head of a docking-type plunger rod, comprising a pump head (10), wherein the pump head (10) is detachably connected to a pump body (20) on the side thereof, and characterized in that: The pump head (10) and the pump body (20) are provided with a plunger rod assembly (30) in cooperation with each other, the plunger rod assembly (30) comprising a first rod body (31) and a second rod body (32) which are detachably connected, and a third rod body (33) is provided at the end of the second rod body (32); The plunger rod assembly (30) is capable of axially moving relative to the pump head (10) and the pump body (20).

2. The stud-split hydraulic end pump head of a docking plunger rod according to claim 1, characterized in that: The end surface of the first rod body (31) has a first slot (37), and the second rod body (32) has an extension rod (34) assembled with the first slot (37).

3. The stud-split hydraulic end pump head of a docking plunger rod according to claim 2, characterized in that: The first rod body (31) has a first hole (36), the extension rod (34) has a second hole, and when the first rod body (31) and the second rod body (32) are in a plugged state, the first hole (36) and the second hole correspond in position and are connected via a second fastener (35).

4. The stud-split hydraulic end pump head of a docking plunger rod according to claim 2, characterized in that: At least one second slot (39) is provided on the slot wall of the first slot (37), and the outer side of the extension rod (34) has a first protrusion (38) plugged into the second slot (39).

5. The stud-split hydraulic end pump head of a docking plunger rod according to claim 1, characterized in that: The pump head (10) has a first chamber (12) and a channel for assembling a plunger rod assembly (30) therein, the channel being in communication with the first chamber (12), and the plunger rod assembly (30) being able to enter and exit the channel; The pump body (20) has an assembly hole coaxially connected to the channel and used for assembling the plunger rod assembly (30), and a mounting hole (23) connected to the assembly hole is opened on the side of the pump body (20), and the mounting hole (23) is arranged perpendicular to the axis of the assembly hole.

6. The stud-split hydraulic end pump head of a docking plunger rod according to claim 1, characterized in that: The pump body (20) comprises a main pump body (21) and an auxiliary pump body (22) which are detachably assembled, wherein a coaxial through hole is provided between the main pump body (21), the auxiliary pump body (22) and the pump head (10), and the auxiliary pump body (22) is arranged between the main pump body (21) and the pump head (10).

7. A stud-type split hydraulic end pump head for a docking plunger rod according to claim 6, characterized in that: A first fastener (13) is built into the through hole, one end of the first fastener (13) is placed in the through hole of the main pump body (21) and is fixed to the main pump body (21), and the other end of the first fastener (13) is placed outside the pump head (10) and is provided with a nut (11).

8. The stud-split hydraulic end pump head of a docking plunger rod according to claim 6, characterized in that: There are at least two through holes.

9. The stud-split hydraulic end pump head of a docking plunger rod according to claim 6, characterized in that: A clamping assembly (24) is provided between the main pump body (21) and the auxiliary pump body (22), the clamping assembly (24) comprising a clamping groove body provided on the main pump body (21), and a clamping block provided on the auxiliary pump body (22), the clamping block being assembled corresponding to the clamping groove.

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