Quick-release pump head of butt joint type split plunger rod

Abstract

The invention belongs to the technical field of plunger pumps, and provides a quick-release pump head of a butt joint type split plunger rod. The device comprises a pump head and a pump body, a plunger part comprises a plunger working section and a plunger power section, the plunger working section is located on the side, close to the pump head, of the plunger part, and the plunger power section is located on the side, away from the pump head, of the plunger part; a plunger connecting section is arranged between the plunger working section and the plunger power section, the plunger power section and the plunger connecting section are axially connected in an inserted mode, and a radial connecting hole is formed in the inserted connection position of the plunger power section and the plunger connecting section. The plunger connecting section serves as a transition area of a disinfection environment and a general environment, so that a fluid part in contact with and conveyed by the plunger rod is separated from a power part in contact with the plunger pump, the plunger working section and the plunger connecting section are conveniently disinfected, and it is guaranteed that the interior of a pump head of the plunger pump has high-standard production conditions; and a high-standard production environment in the pump head is maintained.

Description

Technical Field

[0001] The present invention relates to the technical field of plunger pumps, and provides a quick-release pump head with a docking type split plunger rod. Background Art

[0002] In high-standard manufacturing industries, the transportation and application of some liquids or solid-liquid mixtures are often involved. Therefore, it is necessary to use a plunger pump to transport these fluids in accordance with current hygiene standards to achieve an important link in product production. After the equipment is shut down or the production is adjusted, it is necessary to disinfect and clean the plunger rod and the pump head that are in direct contact with the fluid, or replace different pump heads and the matching plunger rods to achieve different flow rate transports. Therefore, a replaceable plunger rod and a detachable pump head are required to achieve the above functions. The prior art CN221838517U provides a plunger pump, including a plunger sleeve and a groove valve plunger rod. The inner part of the center of the plunger sleeve is a vertical sealed inner cavity. The groove valve plunger rod is closely fitted in the sealed inner cavity of the plunger sleeve. The outer side wall of the plunger sleeve is provided with a horizontal liquid inlet and a liquid outlet. The bottom end of the plunger sleeve is provided with a pump sleeve connecting piece, and the plunger sleeve is non-movably connected to the pump sleeve connecting piece. The inner wall of the plunger sleeve in the prior art is easily worn during the reciprocating movement and repeated disassembly and assembly of the plunger rod. After wear, the plunger rod cannot be tightly connected and accurately positioned, resulting in poor stability and high use cost. The inventor believes that there is a large room for improvement in the prior art. Summary of the Invention

[0003] The object of the present invention is to provide a quick-release pump head for a docking-type split plunger rod, making the pump head and the matching plunger rod replaceable parts, and maintaining a long service life of the plunger rod after it becomes a replaceable part. Secondly, ensure the accurate positioning of the plunger rod during reciprocating motion, maintain the stable flow rate of the plunger pump, and keep the plunger pump at a high volumetric efficiency; improve the assembly efficiency of the split plunger rod, which is beneficial to saving the working time of repeatedly disassembling and assembling the plunger rod and reducing the working intensity of disinfection and washing. To this end, the present invention provides a quick-release pump head for a docking-type split plunger rod, including a pump head and a plunger part. The plunger part includes a plunger working section and a plunger power section. The plunger working section is located on the side of the plunger part close to the pump head, and the plunger power section is located on the side of the plunger part far from the pump head; a plunger connection section is provided between the plunger working section and the plunger power section. The plunger power section and the plunger connection section are axially inserted, and a radial connection hole is provided at the insertion position of the plunger power section and the plunger connection section. By providing a plunger connection section between the plunger working section and the plunger power section, the part of the plunger rod in contact with the conveyed fluid and the part in contact with the power of the plunger pump are separated, which facilitates the disinfection of the plunger working section and the plunger connection section. The plunger connection section serves as a transition area between the disinfection environment and the general environment, ensuring high-standard production conditions inside the pump head of the plunger pump, and providing a sealing structure at the plunger connection section to ensure good sealing conditions between the pump head and the pump body of the plunger pump, maintaining a high-standard production environment inside the pump head; the plunger power section and the plunger connection section are connected by insertion and fixed by a first fastener through the radial connection hole. The insertion connection is beneficial to simplifying the operation of disassembling and assembling the plunger connection section and facilitating the replacement of the plunger working section. The fastener axially limits the plunger connection section to prevent the plunger connection section from being worn during reciprocating motion, changing the movement route of the plunger part, restricting the relative displacement between the plunger connection section and the plunger movement section, and avoiding the change of the volumetric efficiency of the plunger part.

[0004] Preferably, a first connection hole is provided at the insertion position of the plunger power section, and the plunger connection section is provided with an axial connecting rod to cooperate with the first connection hole. Since the plunger power section is fixedly connected to the power device, and a spring is provided on the side of the plunger power section far from the plunger connection section, the plunger pump realizes the reciprocating motion of the plunger part through the power device and the spring; the first connection hole is provided in the plunger power section to facilitate the insertion and positioning of the radial connection hole by the axial connecting rod.

[0005] Preferably, the radial connection hole penetrates through the plunger power section and the plunger connection section in the radial direction. By using a radial connection hole that penetrates through the axial connection seat and the plunger power section, and installing fasteners in the radial connection hole to fix the plunger power section and the plunger connection section, it is beneficial to accurately position the plunger connection section in the axial direction, avoid changes in the linear stroke of the plunger connection section, avoid changes in the volumetric efficiency of the plunger pump, and maintain the flow stability of the plunger pump; the plunger power section performs reciprocating linear motion, and the fasteners in the radial connection hole are repeatedly sheared in the tangential direction. The radial connection hole penetrates through the plunger power section and the plunger connection section, which can increase the stress points of the first fastener and avoid deformation or fracture of the first fastener in the radial connection hole. Further, the first fastener can be a shoulder screw, and the middle section of the shoulder screw has a shaft body, which can better bear the shear force of the reciprocating linear motion of the plunger power section, avoid deformation or damage of the threads of the first fastener, resulting in the inability to remove the fastener, and the plunger part losing the replacement function or even being scrapped.

[0006] Preferably, the radial connection hole extends from the outer wall surface of the first connection hole to the inside of the axial connecting rod in the radial direction. By using the radial connection hole arranged as above, it is avoided that the fastener penetrates through from one side to the other side of the outer wall surface of the first connection hole due to machining tolerance or assembly, resulting in friction between the end of the first fastener and the inner wall of the chamber where the plunger part is located, generating scratches, and affecting the volumetric efficiency of the plunger pump and the sealing performance inside the pump head; since the length and diameter of the radial connection hole are not directly affected by the plunger power section, it is beneficial to select a fastener with a more suitable length-diameter ratio, which can effectively avoid deformation of the first fastener due to shear force during the reciprocating linear motion of the plunger power section, resulting in deformation or damage of the threads of the first fastener, the inability to remove the first fastener, and the plunger part losing the replacement function or even being scrapped.

[0007] Preferably, the outer side surface of the axial connecting rod is provided with a guiding protrusion, and the inner wall surface of the first connection hole is provided with a semi-through groove for cooperation with the guiding protrusion. In order to ensure the sealing performance of the plunger part itself, smaller tolerances are required at the joints of the various components of the plunger part to ensure tight fit. Using the guiding protrusion is beneficial for inserting the axial connecting rod of the plunger connection section into the plunger power part, and the guiding protrusion can assist in splicing the channels of the radial connection holes located in the plunger power section and the plunger connection section respectively, which is beneficial for inserting the fastener into the radial connection hole.

[0008] Preferably, a second connection hole is provided on the side of the plunger connection section away from the axial connecting rod, and the second connection hole is connected to the plunger working section.

[0009] Preferably, the inner wall surface of the first connection hole is polygonal, and the outer shape of the axial connecting rod matches the first connection hole. The inner wall surface of the first connection hole is polygonal, and the polygon has multiple edges. The edges have a guiding effect, which is beneficial for the axial connecting rod to be inserted into the first connection hole; the polygon can limit the rotation of the axial connecting rod, facilitate the splicing of the hole channels of the plunger power section and the plunger connection section of the radial connection hole, and is beneficial for the first fastener to be inserted into the radial connection hole.

[0010] Preferably, the quick-release pump head of the docking type split plunger rod further includes a pump body. The outer surface of the joint between the pump head and the pump body is provided with a clamp body surrounding the joint. The clamp body has an opening, and matching parts are respectively provided on both sides of the opening on the clamp body. The matching parts are connected by a fastener, and a limiting part is connected to one end of the second fastener. The second fastener can control the distance between the two matching parts, and further control the change of the clamping tightness of the clamp body relative to the pump head and the pump body, ensuring the clamping of the pump head and the pump body. More importantly, by controlling the positional relationship between the two matching parts of the clamp body, the clamp body is kept with a high roundness, thereby ensuring a high coaxiality between the pump head and the pump body, and the coaxiality of the plunger part and the chamber where the plunger part is located inside the pump head and the pump body. The coaxiality of the pump head, the pump body, the plunger part and the chamber where the plunger part is located can also be corrected by adjusting the distance between the two matching parts.

[0011] Preferably, the limiting part has a connecting pin rotatably connected to the second fastener, and the distance between the matching parts changes during the rotation of the limiting part. Through the above setting, the rotation of the limiting part affects the tightness of the connection between the clamp body and the pump head and the pump body. In some use scenarios, the connection tightness between the pump head and the pump body can be observed and judged by observing the rotation angle of the limiting part and the ease of rotation of the limiting part, solving the problem that it is difficult to observe the connection situation between the pump head and the pump body when the pump body connecting piece is installed.

[0012] Preferably, a first hole body communicating with the plunger part is opened on the side of the pump body, and the first hole body is perpendicular to the axis of the plunger part. The connection state between the plunger power section and the plunger connection section can be observed through the first hole body. When it is confirmed that the clamp body is fixed, the plunger connection section and the plunger power section are coaxial, ensuring the coaxiality of the plunger part cavity inside the pump body. The connection between the pump bodies is as smooth as possible, reducing the wear of the plunger rod during movement inside the pump body.

[0013] The present invention provides a quick-release pump head for a docking-type split plunger rod, making the pump head and the matching plunger rod replaceable parts, and maintaining a long service life even after the plunger rod becomes a replaceable part; ensuring the accurate positioning of the plunger rod during reciprocating motion, maintaining the stable flow rate of the plunger pump, and keeping the plunger pump at a high volumetric efficiency; improving the assembly efficiency of the split plunger rod, facilitating the saving of working time for repeatedly disassembling and assembling the plunger rod, reducing the working intensity of disinfection and washing, and having the following beneficial effects. The plunger connection section serves as a transition area between the disinfection environment and the general environment, separating the part of the plunger rod in contact with the conveyed fluid from the part in contact with the power part of the plunger pump, facilitating the disinfection of the working section and the connection section of the plunger, and ensuring high-standard production conditions inside the pump head of the plunger pump; and a sealing structure is provided at the plunger connection section to ensure good sealing conditions between the pump head and the pump body of the plunger pump, maintaining a high-standard production environment inside the pump head; the plug-in connection is conducive to simplifying the operation of disassembling and assembling the plunger connection section and facilitating the replacement of the working section of the plunger; avoiding wear of the chamber where the plunger connection section and the plunger part are located during reciprocating motion, changing the movement route of the plunger part, restricting the relative displacement between the plunger connection section and the plunger moving section, and avoiding changes in the volumetric efficiency of the plunger part. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are merely exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can be obtained based on the provided drawings.

[0015] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is an exploded view of the components of the present invention; Figure 3 is an exploded view of the components of the first embodiment of the present invention; Figure 4 is a schematic cross-sectional structural diagram of the first embodiment of the present invention; Figure 5 is an exploded view of the components of the second embodiment of the present invention; Figure 6 is a schematic cross-sectional structural diagram of the second embodiment of the present invention; Figure 7 is a schematic structural diagram of the pipe clamp of the present invention; Figure 8 is a schematic structural diagram of the third embodiment of the present invention; Figure 9 is a cross-sectional view of the third embodiment of the present invention along the first hole body.

[0016] Description of the reference numerals: 1 pump head; 2 pipe clamp; 201 clamp body; 202 second fastener; 203 limiting member; 204 adjusting portion; 3 pump body; 301 first connection hole; 4 plunger connection section; 401 second connection hole; 402 guiding projection; 5 plunger working section; 6 first fastener; 7 radial connection hole; 8 plunger power section; 9 first hole body. Detailed implementation manners

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0018] Embodiment 1 Combined with Figure 1 and Figure 2 As shown, a quick-release pump head 1 of a docking type split plunger rod includes a pump head 1 and a pump body 3. The pump head 1 and the pump body 3 have a plunger part. The plunger part includes a plunger working section 5 and a plunger power section 8. The plunger working section 5 is located on the side of the plunger part close to the pump head 1, and the plunger power section 8 is located on the side of the plunger part far from the pump head 1. A plunger connection section 4 is provided between the plunger working section 5 and the plunger power section 8. The plunger power section 8 and the plunger connection section 4 are axially inserted. A radial connection hole 7 is provided at the insertion position of the plunger power section 8 and the plunger connection section 4. By providing the plunger connection section 4 between the plunger working section 5 and the plunger power section 8, the fluid part contacted by the plunger rod during transportation and the power part of the plunger pump are separated, which is convenient for disinfecting the plunger working section 5 and the plunger connection section 4. The plunger connection section 4 serves as a transition area between the disinfected environment and the general environment, ensuring that the inside of the pump head 1 of the plunger pump meets high-standard production conditions, and a sealing structure is provided at the plunger connection section 4 to ensure good sealing conditions between the pump head 1 and the pump body 3 of the plunger pump, maintaining a high-standard production environment inside the pump head 1. The plunger power section 8 and the plunger connection section 4 are connected by insertion and fixed by the first fastener 6 through the radial connection hole 7. The insertion connection is beneficial to simplify the operation of disassembling and assembling the plunger connection section 4 and facilitate the replacement of the plunger working section 5. The first fastener 6 axially limits the plunger connection section 4 to prevent the plunger connection section 4 from being worn during the reciprocating motion, changing the movement route of the plunger part, restricting the relative displacement between the plunger connection section 4 and the plunger moving section, and avoiding the change of the volumetric efficiency of the plunger part.

[0019] Such as Figure 3As shown, a first connection hole 301 is provided at the insertion position of the plunger power section 8, and the plunger connection section 4 is provided with an axial connecting rod that cooperates with the first connection hole 301. Since the plunger power section 8 is fixedly connected to the power device, and a spring is provided on the side of the plunger power section 8 away from the plunger connection section 4, the reciprocating motion of the plunger part is realized by the power device and the spring in the plunger pump; the first connection hole 301 is provided in the plunger power section 8 to facilitate the insertion and positioning of the axial connecting rod into the radial connection hole 7.

[0020] As Figure 4 shown, the radial connection hole 7 extends from the outer wall surface of the first connection hole 301 to the inside of the axial connecting rod in the radial direction. With the above-described radial connection hole 7, it is avoided that the first fastener 6 passes through from one side to the other side of the outer wall surface of the first connection hole 301 due to machining tolerances or assembly, resulting in friction between the end of the first fastener 6 and the inner wall of the chamber where the plunger part is located, generating scratches, which affects the volumetric efficiency of the plunger pump and the sealing performance inside the pump head 1; since the length and diameter of the radial connection hole 7 are not directly affected by the plunger power section 8, it is beneficial to select a first fastener 6 with a more suitable length-diameter ratio, which can effectively prevent the first fastener 6 from being deformed by shear force during the reciprocating linear motion of the plunger power section 8, resulting in deformation or damage of the thread of the first fastener 6, making the first fastener 6 unable to be removed, and the plunger part losing the replacement function or even being scrapped.

[0021] As Figure 3 shown, a guiding protrusion 402 is provided on the outer side surface of the axial connecting rod, and a semi-through groove is provided on the inner wall surface of the first connection hole 301 to cooperate with the guiding protrusion 402. In order to ensure the sealing performance of the plunger part itself, smaller tolerances are required at the joints of the various components of the plunger part to ensure tight fit. The use of the guiding protrusion 402 is beneficial for the axial connecting rod of the plunger connection section 4 to be inserted into the plunger power part, and the guiding protrusion can assist in splicing the channels of the radial connection holes 7 respectively located in the plunger power section 8 and the plunger connection section 4, which is beneficial for the first fastener 6 to be inserted into the radial connection hole 7.

[0022] A second connection hole 401 is provided on the side of the plunger connection section 4 away from the axial connecting rod, and the second connection hole 401 is connected to the plunger working section 5.

[0023] Combined Figure 1 and Figure 7As shown, the quick-release pump head 1 of the docking-type split plunger rod further includes a pump body 3. An outer surface of the joint between the pump head 1 and the pump body 3 is provided with a pipe clamp 2 surrounding the joint. The clamp body 201 of the pipe clamp 2 has an opening. On both sides of the opening, there are respectively mating parts on the clamp body 201. The mating parts are connected by a second fastener 202. One end of the second fastener 202 is connected with a limiting part 203, and the other end of the second fastener 202 is an adjusting part 204. The second fastener 202 can control the maximum distance range between the two mating parts through the adjusting part 204, and control the specific distance between the two mating parts through the limiting part 203, thereby controlling the change of the clamping tightness of the clamp body 201 relative to the pump head 1 and the pump body 3, ensuring the clamping of the pump head 1 and the pump body 3. More importantly, by controlling the positional relationship between the two mating parts of the clamp body 201, the clamp body 201 is kept with a high roundness, so as to ensure a high coaxiality between the pump head 1 and the pump body 3, and the coaxiality of the plunger part and the chamber where the plunger part is located inside the pump head 1 and the pump body 3. The coaxiality of the pump head 1, the pump body 3, the plunger part and the chamber where the plunger part is located can also be corrected by adjusting the distance between the two mating parts.

[0024] The limiting part 203 has a connecting pin rotatably connected with the second fastener 202. During the rotation of the limiting part 203, the distance between the mating parts changes. Through the above setting, the rotation of the limiting part 203 affects the tightness of the connection between the clamp body 201 and the pump head 1 and the pump body 3. In some use scenarios, the tightness of the connection between the first pump body 3 and the second pump body 3 can be observed and judged by observing the rotation angle of the limiting part 203 and the ease of rotation of the limiting part 203, solving the problem that it is difficult to observe the connection situation between the pump head 1 and the pump body 3 in the installation state of the pump body 3 connecting parts.

[0025] Embodiment 2 Combined with Figure 5 and Figure 6As shown, the difference from the first embodiment is that the radial connection hole 7 penetrates the plunger power section 8 and the plunger connection section 4 in the radial direction. By adopting the radial connection hole 7 that radially penetrates the axial connection seat and the plunger power section 8, and installing the first fastener 6 in the radial connection hole 7 to fix the plunger power section 8 and the plunger connection section 4, it is beneficial to accurately position the plunger connection section 4 in the axial direction, avoid changes in the linear stroke of the plunger connection section 4, avoid changes in the volumetric efficiency of the plunger pump, and maintain the flow stability of the plunger pump; the plunger power section 8 performs reciprocating linear motion, and the first fastener 6 in the radial connection hole 7 is repeatedly sheared in the tangential direction. The radial connection hole 7 penetrates the plunger power section 8 and the plunger connection section 4, which can increase the stress points of the first fastener 6 and avoid deformation or fracture of the first fastener 6 in the radial connection hole 7. Further, the longer radial connection hole enables the first fastener 6 to adopt a shoulder screw. The middle section of the shoulder screw has a shaft body, which can better bear the shear force of the reciprocating linear motion of the plunger power section 8, avoid deformation or damage of the thread of the first fastener 6, resulting in the inability to remove the first fastener 6, and the plunger part losing the replacement function or even being scrapped. The inner wall surface of the first connection hole 301 is polygonal, and the outer shape of the axial connecting rod matches the first connection hole 301. The inner wall surface of the first connection hole 301 is polygonal. The polygon has multiple edges, and the edges have a guiding effect and can still maintain the guiding and limiting effects even after slight wear, which is beneficial for the axial connecting rod to be inserted into the first connection hole 301; the polygon can limit the rotation of the axial connecting rod, facilitate the splicing of the hole channels of the plunger power section 8 part and the plunger connection section 4 part of the radial connection hole 7, and is beneficial for the first fastener 6 to be inserted into the radial connection hole 7.

[0026] Embodiment Three What is also different from the first and second embodiments is that in combination Figure 8 and Figure 9 As shown, in this embodiment, a first hole body 9 communicating with the plunger part 4 is provided on the side of the pump body 3, and the first hole body 9 is arranged perpendicular to the axis of the plunger part 4. The connection state between the plunger power section 401 and the plunger connection section 402 can be observed through the first hole body 9. When confirming the fixation of the clamp body, the plunger connection section 402 and the plunger power section are coaxial, ensuring the coaxiality of the cavity of the plunger part 4 inside the pump body. The connection part between the pump bodies 3 is as smooth as possible to reduce the wear of the plunger rod during movement inside the pump body; the first fastener 6 can be pulled out through the first hole body 9 to release the fixation between the plunger connection section 4 and the plunger power section 8. During disassembly, the plunger connection section 4 and the part of the pump body 3 close to the plunger connection section 4 can be removed together.

[0027] The present invention provides a quick-release pump head 1 for a docking-type split plunger rod, making the pump head 1 and the matching plunger rod replaceable parts, and maintaining a long service life after the plunger rod becomes a replaceable part; ensuring the accurate positioning of the plunger rod during reciprocating motion, maintaining the stable flow rate of the plunger pump, and keeping the plunger pump at a high volumetric efficiency; improving the assembly efficiency of the split plunger rod, being beneficial to saving the working time of repeatedly disassembling and assembling the plunger rod, reducing the working intensity of disinfection and washing, and having the following beneficial effects. The plunger connection section 4 serves as a transition area between the disinfection environment and the general environment, separating the part of the plunger rod that contacts the transported fluid from the part that contacts the power part of the plunger pump, facilitating the disinfection of the plunger working section 5 and the plunger connection section 4, and ensuring high-standard production conditions inside the pump head 1 of the plunger pump; and a sealing structure is provided at the plunger connection section 4 to ensure good sealing conditions between the pump head 1 and the pump body 3 of the plunger pump, maintaining a high-standard production environment inside the pump head 1; the plug-in connection is beneficial to simplifying the operation of disassembling and assembling the plunger connection section 4 and facilitating the replacement of the plunger working section 5; avoiding wear of the plunger connection section 4 and the chamber where the plunger part is located during reciprocating motion, changing the movement route of the plunger part, restricting the relative displacement between the plunger connection section 4 and the plunger moving section, and avoiding a change in the volumetric efficiency of the plunger part.

[0028] The above embodiments and / or implementation manners are only used to illustrate the preferred embodiments and / or implementation manners for implementing the technology of the present invention, and do not impose any formal restrictions on the implementation manners of the technology of the present invention. Any person skilled in the art, without departing from the scope of the technical means disclosed in the content of the present invention, may make some modifications to other equivalent embodiments, but should still be regarded as the same technology or embodiment as the present invention in essence.

Claims

1. A quick-release pump head with a docking-type split plunger rod, comprising a pump head (1) and a pump body (3), wherein the pump head (1) and the pump body (3) have a plunger portion inside, characterized in that: The plunger portion comprises a plunger working section (5) and a plunger power section (8); a plunger connecting section (4) is provided between the plunger working section (5) and the plunger power section (8); the plunger power section (8) and the plunger connecting section (4) are axially plugged; and a radial connecting hole (7) is provided at the connection between the plunger power section (8) and the plunger connecting section (4).

2. A quick-release pump head with a docking split plunger rod according to claim 1, characterized in that: The plug-in position of the plunger power section (8) is provided with a first connection hole (301), and the plunger connection section (4) is provided with an axial connection rod that cooperates with the first connection hole (301).

3. A quick-release pump head with a docking split plunger rod according to claim 2, characterized in that: The radial connection hole (7) penetrates the plunger power section (8) and the plunger connection section (4) in the radial direction.

4. A quick-release pump head with a docking split plunger rod according to claim 2, characterized in that: The radial connection hole (7) extends in a radial direction from an outer wall surface of the first connection hole (301) to the interior of the axial connection rod.

5. A quick-release pump head with a docking split plunger rod according to claim 4, characterized in that: A guide protrusion is provided on the outer side surface of the axial connecting rod, and a semi-through groove is provided on the inner wall surface of the first connecting hole (301) to cooperate with the guide protrusion.

6. A quick-release pump head with a docking split plunger rod according to claim 3 or 5, characterized in that: A second connection hole is provided on a side of the plunger connection section (4) away from the axial connection rod, and the second connection hole is connected to the plunger working section (5).

7. A quick-release pump head with a docking split plunger rod according to claim 3, characterized in that: The inner wall surface of the first connecting hole (301) is polygonal, and the outer shape of the axial connecting rod matches the first connecting hole (301).

8. A quick-release pump head with a docking split plunger rod according to claim 7, characterized in that: A pipe clamp (2) surrounding the joint is provided on the outer surface of the joint between the pump head (1) and the pump body (3); the pipe clamp (2) comprises a clamp body (201) having an opening; matching portions are provided on both sides of the opening on the clamp body (201); the matching portions are connected via a second fastener (202); and one end of the second fastener (202) is connected to a limiting member (203).

9. A quick-release pump head with a docking split plunger rod according to claim 8, characterized in that: The limiting member (203) has a connecting pin rotatably connected to the second fastening member (202).

10. A quick-release pump head with a docking split plunger rod according to claim 8, characterized in that: A first hole (9) communicating with the plunger portion (4) is formed on a side surface of the pump body (3); the first hole (9) is arranged perpendicular to the axis of the plunger portion (4); the radial connection hole (7) is provided with a first fastener (6); the first fastener (6) cooperates with the first hole (9).

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