Plunger butt joint type spinner split pump head assembly

Abstract

The invention discloses a plunger butt joint type spinner split pump head assembly which is used for conveying media and belongs to the technical field of plunger pumps, the plunger butt joint type spinner split pump head assembly comprises a pump head and a plunger rod installed in the pump head, a first pump body is arranged on one side of the pump head, a second pump body is arranged on the outer side of the first pump body, and the first pump body and the second pump body are fixedly connected through a spinner. A concave hole is formed in the side face of the rotary buckle. According to the device, the plunger rod can be integrally detached along with the pump head, and the problem that the pump head is difficult to maintain due to the fact that the plunger rod is fixedly connected with the plunger is effectively solved.

Description

Technical Field

[0001] The invention belongs to the technical field of plunger pumps, and in particular relates to a plunger docking type rotary buckle split pump head assembly. Background Art

[0002] Plunger rod plunger pump head technology involves high-pressure fluid transmission. Its operating principle is based on the reciprocating motion of the plunger within the pump cylinder to achieve the suction and discharge of liquid. Plunger pumps are suitable for high-pressure liquid transportation and have the characteristics of low flow rate, high pressure, and good stability. The pump head design is flexible and can be selected from different materials and structures according to different conveying media to meet different process requirements. Plunger pumps are widely used in the fields of petrochemicals, food and pharmaceuticals, environmental protection and sewage treatment. Due to their high efficiency, stability, and durability, they have become the core power of industrial fluid transmission. However, the existing technology has the problem that the plunger rod cannot be removed along with the pump head, making the maintenance of the plunger rod and pump head difficult.

[0003] Application No. US16874816 discloses a plunger pump hydraulic end assembly structure comprising a valve housing assembly, a suction gland, and a suction cap. The suction gland is connected to the suction cap, which in turn is connected to the valve housing assembly via a suction packing seal assembly. This structure utilizes an O-ring or D-ring seal in the suction packing seal assembly, resulting in improved sealing performance and greater resistance to high pressure and fluid erosion. This meets current requirements for high-pressure, high-displacement continuous operation, reduces wear on the vacuum gland and / or valve body, and effectively extends the service life of the piston. However, this patent still offers room for improvement.

[0004] It should be noted that the above introduction to the technical background is merely intended to provide a clear and complete description of the technical solutions of this application and facilitate understanding by those skilled in the art. Simply because these solutions are described in the background technology section of this application, it should not be assumed that the above technical solutions are well known to those skilled in the art. Summary of the Invention

[0005] To address the problems of the prior art, the present invention provides a plunger-jointed, twist-on, split pump head assembly for transporting media. This device allows the plunger rod to be removed along with the pump head, effectively resolving the difficulty in maintaining the pump head due to the fixed connection between the plunger rod and the plunger.

[0006] In order to solve the above technical problems, the present invention specifically provides the following technical solutions: A plunger-butted, screw-on split pump head assembly comprises a pump head and a plunger rod installed in the pump head. A first pump body is provided on one side of the pump head, and a second pump body is provided on the outside of the first pump body. The first pump body and the second pump body are fixedly connected by a screw-on buckle, and a concave hole is provided on the side of the screw-on buckle.

[0007] According to one embodiment of the present invention, the first and second pump bodies are provided with through holes that mate with the plunger rod, and the through holes are coaxial with the plunger rod. A peephole is provided on the side of the first pump body, with the axis of the peephole perpendicular to the axis of the plunger rod. The outer ends of each of the first and second pump bodies are provided with threaded protrusions that surround the first and second pump bodies, and the inner sides of the screw buckles have grooves that mate with the threaded protrusions. A pump body is provided between the first pump body and the pump head, and the pump body is threadedly connected to the first pump body.

[0008] The first pump body and the second pump body are mutually interlocking column sleeve bodies. Two oppositely arranged square protrusions are extended axially outward from the contact end of the first pump body and the second pump body. The second pump body is provided with a groove that cooperates with the square protrusion. During installation, the first pump body and the second pump body are interlocked with each other, and the square protrusion is deeply embedded in the groove, so that the first pump body and the second pump body do not rotate relative to each other. The protrusion can also be used as an installation positioning component to avoid installation misalignment. Since the plunger rod is installed at the central axis of the two pump bodies, there is a space between the plunger rod and the curved surface at the bottom of the two pump bodies. This space can collect the waste lubricating grease that falls on the plunger rod and the metal residue and other garbage that may be generated by friction during equipment operation. The waste lubricating grease will be mixed with the metal debris and other garbage, so that it cannot be in contact with the components in the pump chamber for a long time, thereby preventing it from affecting the operation of the equipment and causing continuous wear to the components in the pump chamber. It is also convenient for personnel to clean and maintain. The square pump head and cylindrical pump body ensure quick and easy installation while maintaining the stability of the plunger pump. Simply align the square protrusions with the grooves, and then tighten the two pump bodies with a screw lock. The peephole design allows personnel to observe the state of the lubricating oil in the pump chamber through the peephole to determine whether cleaning and maintenance are required. When the lubricating grease deteriorates, it will emit a pungent or unusual odor. When the lubricating grease in the pump chamber deteriorates, the odor will be discharged in large quantities through the peephole, alerting personnel to clean and maintain the plunger pump in a timely manner.

[0009] According to one embodiment of the present invention, the side array of the turnbuckle is provided with a tensioning screw, and the tensioning screw is coaxial with the recessed hole.

[0010] When installing the first and second pump bodies, the first and second pump bodies are first assembled by fitting the screw cap to the first and second pump bodies, thereby connecting them together. The screw cap is provided with a groove that mates with the threaded structure on the first and second pump bodies. The inner wall of the groove contacts the threaded protrusions on the two pump bodies. A tensioning screw passes through the side wall of the screw cap and communicates with the inner groove. After tightening the tensioning screw, the screw shank presses against the threaded protrusion that contacts the inner wall of the screw cap groove. Continued tightening of the tensioning screw increases the gap between the threaded protrusion and the screw cap, increasing the friction between the screw cap and the two pump bodies, thereby achieving a secure connection and avoiding the potential problem of a loose threaded connection between the two pump bodies using only one screw cap. Furthermore, during operation of the plunger pump, continuous vibration is generated, which may also loosen the connection between the components. The tensioning screws are designed in an array relative to the central axis of the screw cap, applying a tightening effect to the screw cap and the two pump bodies from multiple angles, minimizing the risk of loosening the screw cap due to vibration.

[0011] According to one embodiment of the present invention, one end of the plunger rod is connected to a plunger rod seat. The plunger rod seat is a columnar body, and one end of the columnar body is provided with an axially inward groove. The plunger rod is mounted in the groove. The other end of the columnar body is connected to the plunger. The end of the plunger connected to the columnar body is provided with an axially inward mounting base hole. The mounting base hole is a cylindrical groove, and two rectangular notches are provided on the sidewall of the cylindrical groove. A pin hole is provided on the outer side of the cylindrical groove. A rod body is extended axially outward from the end of the plunger rod seat connected to the plunger. A block is protruded radially outward from the rod body to fit the rectangular notch. A hole is provided on the sidewall of the rod body, and the hole is coaxial with the pin hole. A shoulder screw is provided on the pin hole.

[0012] The power mechanism pushes the plunger rod, thereby pushing the plunger, causing the plunger to move in one direction, resulting in negative pressure in the working chamber. The working chamber is provided with oil pipes towards both ends of the pump head, which are connected to the outside world, so that the liquid is sucked into the cylinder. When the plunger finishes one stroke and moves in the other direction, the liquid is compressed and the liquid sucked into the cylinder is discharged. As the plunger continuously reciprocates, continuous oil supply is achieved. The plunger rod is fixedly connected to the plunger rod seat. The fixing methods of the plunger rod and the plunger rod seat include but are not limited to welding, threading, heat fitting, bonding, etc. Insert the rod body extending from the end of the plunger rod seat into the mounting base hole, and then screw the shoulder screw through the pin hole into the hole on the side wall of the rod body on one side of the middle plunger rod seat. The combination of the peephole and the shoulder screw eliminates the need for sequential disassembly of the plunger pump. Instead, the shoulder screw can be removed through the peephole first, followed by the pump head. After removing the pump head, the pump head and plunger rod can be removed simultaneously. During installation, the pump head can be installed first, aligning the plunger rod with the plunger rod seat. After securing the pump head, the shoulder screw can be used to secure the plunger rod to the plunger rod seat. This prevents the plunger rod from swaying side to side during installation, preventing uneven force on the connection between the plunger rod and the plunger rod seat. This can lead to increased wear or even damage to the connection. Furthermore, the rectangular notch on the plunger rod and the block on the plunger rod seat that mates with the rectangular notch prevent the plunger from rotating relative to the rod. During operation, the plunger translates axially within the pump chamber. Rotation within the pump chamber subjects the plunger to a force perpendicular to this axial translation. The interplay of these two forces accelerates piston wear.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The space between the plunger rod and the pump housing collects waste lubricant and metal debris from friction during operation, preventing them from affecting operation, causing wear and noise to pump components, and facilitating cleaning and maintenance. A peephole allows operators to observe the lubricant's condition within the pump chamber and determine if cleaning and maintenance are necessary. Furthermore, if the lubricant deteriorates, the odor is expelled through the peephole, alerting personnel to the need for prompt maintenance. The tensioning screw design minimizes loosening of the screw cap due to pump vibration. The plunger rod and rod holder can be secured after the pump head is installed, preventing uneven force at the connection between the rod and rod holder due to movement during pump head installation. The plunger cannot rotate relative to the rod, preventing increased wear caused by the conflict between axial and rotational forces. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0015] Figure 1 This is a schematic diagram of the plunger docking type screw-on split pump head assembly scheme of the present invention; Figure 2 Schematic diagram of the cross-section of the plunger docking type twist-on split pump head assembly of the present invention; Figure 3 This is a cross-sectional diagram of the cooperation between the plunger rod and the pump head of the present invention; Figure 4 This is a schematic diagram of the plunger rod solution of the present invention; Figure 5 This is a schematic diagram of the plunger rod connection scheme of the present invention; Figure 6 Schematic cross-sectional view of the plunger rod of the present invention; Figure 7 This is a schematic diagram of the plunger rod solution of the second embodiment of the present invention; Figure 8 Schematic diagram of the cross section of the plunger rod according to the second embodiment of the present invention.

[0016] Figure numbers: 10-pump body; 101-first pump body; 102-second pump body; 103-peephole; 20-turn buckle; 201-tensioning screw; 30-pump head; 301-seal; 302-working chamber; 401-plunger; 402-plunger rod; 403-plunger rod seat; 404-shoulder screw; 405-pin hole; 406-mounting base hole; 501-first magnetic block; 502-second magnetic block; 503-middle connecting rod; 504-plunger rod; 505-plunger. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0018] The following first describes the concepts involved in this application with reference to the accompanying drawings. It should be noted that the following description of each concept is intended only to make the content of this application easier to understand and does not limit the scope of protection of this application. At the same time, the embodiments and features in the embodiments of this application can be combined with each other unless there is a conflict. The following detailed description of this application will be made with reference to the accompanying drawings and in conjunction with the embodiments.

[0019] Example 1 See attached Figures 1-6 As shown, a plunger-butted, screw-on split pump head assembly includes a pump head 30 and a plunger rod 402 installed in the pump head 30. A first pump body 101 is provided on one side of the pump head 30, and a second pump body 102 is provided on the outside of the first pump body 101. The first pump body 101 and the second pump body 102 are fixedly connected by a screw-on buckle 20, and a concave hole is provided on the side of the screw-on buckle 20.

[0020] The first pump body 101 and the second pump body 102 are provided with through holes that mate with the plunger rod 402, and the through holes are coaxial with the plunger rod 402. A peephole 103 is provided on the side of the first pump body 101, with the axis of the peephole 103 perpendicular to the axis of the plunger rod 402. The outer ends of the first pump body 101 and the second pump body 102 are each provided with a threaded protrusion that surrounds the first pump body 101 and the second pump body 102, and the inner side of the screw button 20 has a groove that mates with the threaded protrusion. The pump body 10 is located between the first pump body 101 and the pump head 30, and the pump body 10 is threadedly connected to the first pump body 101.

[0021] The first pump body 101 and the second pump body 102 are mutually interlocking column sleeves. Two oppositely arranged square protrusions are extended axially outward from the contact end of the first pump body 101 and the second pump body 102. The second pump body 102 is provided with a groove that cooperates with the square protrusion. During installation, the first pump body 101 and the second pump body 102 are interlocked with each other, and the square protrusion is deeply embedded in the groove, so that the first pump body 101 and the second pump body 102 do not rotate relative to each other. The protrusion can also serve as an installation positioning component to avoid installation misalignment. Since the plunger rod 402 is installed at the central axis of the two pump bodies, there is a space between the plunger rod 402 and the curved surface at the bottom of the two pump bodies. This space can collect waste lubricating grease that falls on the plunger rod 402 and metal debris and other garbage that may be generated by friction during equipment operation. The waste lubricating grease will be mixed with metal debris and other garbage, preventing it from contacting and rubbing with the components inside the pump chamber for a long time, thereby preventing it from affecting the operation of the equipment and causing continuous wear to the components inside the pump chamber. It is also convenient for personnel to clean and maintain. The pump head 30 is square and the pump body is cylindrical. This shape combination ensures that the plunger pump is stable while ensuring easy and quick installation between the pump bodies. Simply align the square protrusion with the groove and install it, and then tighten the two pump bodies using the screw buckle 20. The design of the peephole 103 allows personnel to observe the state of the lubricating oil in the pump chamber through the peephole 103 to determine whether cleaning and maintenance are required. At the same time, when the lubricating grease deteriorates, it will emit a pungent or unusual odor. When the lubricating grease in the pump chamber deteriorates, the odor can be largely discharged through the peephole 103, alerting personnel to clean and maintain the plunger pump in a timely manner.

[0022] A tensioning screw 201 is provided in an array on the side of the turn button 20 , and the tensioning screw 201 is coaxial with the concave hole.

[0023] When installing the first pump body 101 and the second pump body 102, first, the rotary buckle 20 is installed in cooperation with the first pump body 101 and the second pump body 102 to connect the first pump body 101 and the second pump body 102 together. Since the rotary buckle 20 is provided with a groove that cooperates with the threaded structure on the first pump body 101 and the second pump body 102, the inner wall of the groove and the threaded protrusions on the two pump bodies are in contact with each other. The tensioning screw 201 passes through the side wall of the rotary buckle and communicates with the internal groove. After tightening the tightening screw 201, the screw rod will press against the threaded protrusion corresponding to the inner wall of the rotary buckle groove. Continuing to tighten the tightening screw 201 will increase the gap between the threaded protrusion and the contact surface of the rotary buckle, and the friction between the rotary buckle 20 and the two pump bodies will increase, thereby achieving the tightening effect and avoiding the problem that the threaded connection of the two pump bodies using the rotary buckle 20 in a single way may not be firm. At the same time, during the operation of the plunger pump, continuous vibration will be generated, which may also loosen the connection between the components. The tensioning screws are designed in an array relative to the central axis of the turnbuckle, exerting a tightening effect on the turnbuckle 20 and the two pump bodies from multiple angles, thereby minimizing the loosening of the turnbuckle 20 caused by the vibration of the plunger pump.

[0024] One end of the plunger rod 402 is connected to a plunger rod seat 403. This seat is cylindrical, with a groove axially inwardly defined at one end. The plunger rod 402 is mounted within this groove. The other end of the cylinder is connected to the plunger 401. A mounting base hole 406 is defined axially inwardly at the end of the plunger 401 connected to the cylinder. Mounting base hole 406 is a cylindrical groove with two opposing rectangular notches on its sidewalls. A pin hole 405 is located on the outer side of the cylindrical groove. A rod body extends axially outward from the end of the plunger rod seat 403 connected to the plunger 401. A block protrudes radially outward from the rod body, which fits within the rectangular notches. A hole is defined in the sidewall of the rod body, coaxial with the pin hole 405. A shoulder screw 404 is located in the pin hole 405.

[0025] The power mechanism pushes the plunger rod 402, thereby pushing the plunger 401, causing the plunger 401 to move in one direction, resulting in negative pressure in the working chamber 302. The working chamber 302 is provided with oil pipes in the directions of both ends of the pump head 30, and the oil pipes are connected to the outside world, so that the liquid is sucked into the cylinder; when the plunger 401 finishes a stroke and moves in the other direction, the liquid is compressed and the liquid sucked into the cylinder is discharged. Since the plunger 401 continuously reciprocates, continuous oil supply is achieved. The plunger rod 402 is fixedly connected to the plunger rod seat 403. The fixing methods of the plunger rod 402 and the plunger rod seat 403 include but are not limited to welding, threading, heat fitting, bonding, etc. The rod body extending from the end of the plunger rod seat 403 is inserted into the mounting base hole 406, and then the shoulder screw 404 is screwed into the hole on the side wall of the rod body on one side of the middle plunger rod seat 403 through the pin hole 405. The cooperation between the peephole 103 and the shoulder screw 404 eliminates the need to disassemble the plunger pump in sequence. The shoulder screw 404 can be removed through the peephole 103 first, and then the pump head 30 can be removed. After the pump head 30 is removed, the pump head 30 and the plunger rod 402 can be removed at the same time. During installation, the pump head 30 can be installed first, and the plunger rod 402 can be aligned with the plunger rod seat 403. After the pump head 30 is fixed, the plunger rod 402 can be fixed to the plunger rod seat 403 using the shoulder screw 404. This prevents the plunger rod 402 from being fixed to the plunger rod seat 403 first, and then the left and right shaking of the pump head 30 during installation, which can cause uneven force on the connection between the plunger rod 402 and the plunger rod seat 403, thereby increasing wear or even damaging the connection. In addition, the rectangular notch on the plunger rod 402 and the block on the plunger rod seat 403 that is installed in conjunction with the rectangular notch can also prevent the plunger 401 from rotating relative to the plunger rod 402. When working, the plunger 401 translates axially in the pump chamber, and the rotation of the plunger 401 in the pump chamber will cause the plunger 401 to be subjected to a force perpendicular to the axial translation. The intersection of these two forces will accelerate the wear of the plunger 401.

[0026] At the same time, it should be noted that in this embodiment, the number of plunger rod assemblies consisting of the plunger rod 402, the plunger rod seat 403 and the plunger 401 installed in the plunger pump is 1-4 groups, but the present technical solution is not limited to 1-4 groups, for example, it can be 1 group, 2 groups, 3 groups, 4 groups, 5 groups, 6 groups, 7 groups, 8 groups, 9 groups, 10 groups, 11 groups..., and in actual production work, according to different production needs, different numbers of plunger rod assemblies can be selected for installation and use in conjunction with the plunger pump.

[0027] Example 2 See attached Figure 7-Figure 8 As shown, the present invention has another optimized solution, using another form of plunger rod assembly to replace the plunger rod portion in Example 1. The plunger rod assembly in this embodiment includes a first magnetic block 501 and a second magnetic block 502. The second magnetic block 502 is provided at the end of the plunger 505. The first magnetic block 501 is provided on the surface adjacent to the intermediate connecting rod 503 and the plunger 505, and the second magnetic block 502 is provided in conjunction with the first magnetic block 501. The first magnetic block 501 has a first end face, and the second magnetic block 502 has a second end face. The first end face and the second end face are parallel and arranged in conjunction with each other. The mutually parallel end faces provide the first magnetic block 501 and the second magnetic block 502 with a more stable contact surface. On the one hand, this reduces the difficulty of manufacturing the magnetic blocks. On the other hand, even if the plunger 505 and the intermediate connecting rod 503 have not achieved initial positioning before assembly, the parallel end faces can achieve rapid connection of the rod body, optimizing the posture calibration work before assembly of the plunger 505 and the intermediate connecting rod 503 and improving the connection efficiency of the plunger 505 and the intermediate connecting rod 503.

[0028] The plunger 505 is provided with a first mounting hole for mounting the second magnet 502, and the intermediate connecting rod 503 is provided with a second mounting hole for mounting the first magnet 501. This facilitates positioning the magnets at the center of their respective rod ends, ensuring that the first and second magnets 501, 502, and the plunger rod assembly are subjected to balanced lateral restraining forces during movement. This reduces the risk of rotation of the components of the plunger rod assembly due to eccentricity of the first and second magnets 501, 502 relative to the plunger rod assembly at the connection point, thereby reducing wear on the pump body and the internal cavity of the pump head caused by torsion of the plunger rod assembly. One end of the second magnetic block 502 is located in the first mounting hole, and the other end is located outside the first mounting hole; one end of the first magnetic block 501 is located in the second mounting hole, and the other end is located outside the second mounting hole. The design scheme of the magnetic block makes the plunger rod group structure simpler, simplifies the disassembly and assembly process, and reduces costs. On the other hand, a storage space can be formed between the plunger 505 and the intermediate connecting rod 503 at the connection between the first magnetic block 501 and the second magnetic block 502, so that metal debris generated after equipment wear can be absorbed, while reducing equipment wear and extending the service life of components. In addition, since demagnetization equipment such as demagnetizers can be demagnetized without contacting the magnetic block, when the plunger pump encounters an unexpected situation, such as switch failure, equipment conduction, etc., and needs to stop working urgently, personnel can also eliminate the magnetism of the magnetic block and disconnect the plunger 505 from the intermediate connecting rod 503, thereby forcing the plunger pump to stop working and avoid the occurrence of unexpected situations.

[0029] One end of the intermediate connecting rod 503 is connected to the first magnetic block 501, and the other end is connected to a coaxial plunger rod 504. The plunger rod 504 is detachably connected to the intermediate connecting rod 503. The pump head has a built-in first chamber, which is connected to the assembly hole in the pump head. The plunger rod 504 can move axially within the assembly hole. The end of the plunger rod 504 can enter and exit the first chamber. The reciprocating motion of the plunger rod assembly is used to control the negative pressure within the first chamber to achieve medium delivery.

[0030] 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 do not impose any form of limitation on the implementation methods of the technology of the present invention. Any person skilled in the art 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.

[0031] 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 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, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of this application, they can also make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A plunger-butted, twist-on split pump head assembly, comprising a pump head (30) and a plunger rod (402) installed in the pump head (30). Its characteristics are: A first pump body (101) is provided on one side of the pump head (30), and a second pump body (102) is provided on the outside of the first pump body (101). The first pump body (101) and the second pump body (102) are fixedly connected by a turn buckle (20), and a concave hole is provided on the side of the turn buckle (20); the outer sides of the ends of the first pump body (101) and the second pump body (102) are both provided with a threaded protrusion surrounding the first pump body (101) and the second pump body (102), and the inner side of the turn buckle (20) has a groove that cooperates with the threaded protrusion.

2. The plunger-butted, twist-on split pump head assembly according to claim 1, characterized in that: The first pump body (101) and the second pump body (102) are provided with a through hole that cooperates with the plunger rod (402), and the through hole and the plunger rod (402) are coaxial.

3. The plunger-butted, twist-on split pump head assembly according to claim 1, characterized in that: A peephole (103) is provided on the side of the first pump body (101), and the axis of the peephole (103) is perpendicular to the axis of the plunger rod (402).

4. The plunger-butted, twist-on split pump head assembly according to claim 1, characterized in that: A pump body (10) is provided between the first pump body (101) and the pump head (30), and the pump body (10) is threadedly connected to the first pump body (101).

5. The plunger-butted, twist-on split pump head assembly according to claim 1, characterized in that: The side array of the turn button (20) is provided with a tensioning screw (201), and the tensioning screw (201) is coaxial with the concave hole.

6. The plunger-butted, twist-on split pump head assembly according to claim 1, characterized in that: One end of the plunger rod (402) is connected to a plunger rod seat (403), the plunger rod seat (403) is a column, one end of the column is provided with a groove axially inward, the plunger rod (402) is installed in the groove, the other end of the column is connected to a plunger (401), and the plunger (401) is connected to one end of the column and is provided with a mounting base hole (406) axially inward.

7. The plunger-butted, twist-on split pump head assembly according to claim 6, characterized in that: The mounting base hole (406) is a cylindrical groove, two rectangular notches are provided on the side walls of the cylindrical groove in opposite directions, and a pin hole (405) is provided on the outside of the cylindrical groove.

8. The plunger-butted, twist-on split pump head assembly according to claim 7, characterized in that: The plunger rod seat (403) is connected to the plunger (401) at one end, and a rod body is axially extended outwards. The rod body has a block protruding radially outwards and matching with the rectangular notch.

9. The plunger-butted, twist-on split pump head assembly according to claim 8, characterized in that: A hole is provided on the side wall of the rod body, the hole is coaxial with the pin hole (405), and a shoulder screw (404) is provided on the pin hole (405).

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