Quick-release pump head of clamping groove type split plunger rod

Abstract

The invention belongs to the technical field of plunger pumps, and provides a quick-release pump head of a clamping groove type split plunger rod. The plunger pump comprises a pump head and a pump body, a plunger part is arranged in the pump head and the pump body, the plunger part comprises a plunger power section and a plunger connecting section which are connected, a semi-through groove extending in the radial direction is formed in the side, close to the plunger connecting section, of the plunger power section, a clamping part is arranged on the side, close to the plunger power section, of the plunger connecting section, and the clamping part is matched with the semi-through groove. The semi-through groove can be machined in a cutting mode, the produced plunger rod can be conveniently modified, the production cost is reduced, the clamping groove is convenient to connect, disassemble and assemble, and repeated disassembly, assembly, disinfection and washing in the using process are convenient. And the clamping part can be cut and modified on the basis of the original plunger connecting section, so that the production cost is reduced, and parts required for assembling and fixing the plunger connecting section and the plunger power section are reduced.

Description

Technical Field

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

[0002] Traditional pumps suitable for fluid transportation in high-standard sanitary industries are mostly stainless steel gear pumps or vane pumps. With the rapid development of the industry, traditional gear pumps or vane pumps can no longer meet the needs of high pressure, high flow, constant flow and constant pressure required for industry production, so plunger pumps are required to provide a suitable production environment. However, traditional plunger pumps are mostly integrated plunger rods and pump heads that are non-detachably connected by welding, resulting in high manufacturing costs and difficult maintenance of traditional plunger pumps, which cannot meet the hygiene requirements and diverse flow requirements of the food, pharmaceutical and biochemical industries. Prior art CN114645845B is a plunger assembly and a plunger pump. The plunger assembly of the present invention comprises: a plunger rod, one end of which has a first flange; a slider rod, one end of which has a second flange; and a connecting ring, the connecting ring comprising a first half ring and a second half ring that are detachably connected, the first half ring having a first groove on its inner wall surface, the second half ring having a second groove on its inner wall surface, the first groove and the second groove forming a first annular groove, wherein the first flange abuts against the second flange, the connecting ring is sleeved on the first flange and the second flange, and the first flange and the second flange are clamped in the first annular groove. The prior art can freely assemble and disassemble the plunger rod, but the plunger rod has more assembly parts and a high failure rate. The inventor believes that there is a large room for improvement in the prior art. Summary of the invention

[0003] The purpose of the present invention is to make the pump head and the matching plunger rod replaceable parts, and to reduce the number of parts of the split plunger rod. The plunger part is radially inserted to complete the assembly, simplifying the assembly steps and reducing the time cost of disinfection and cleaning. Secondly, the impact caused by the gap between the plunger power section and other plunger parts during the stroke conversion period is reduced; the number of wearing parts is reduced, and the service life of the plunger pump is extended; it can be cut and manufactured on the basis of the original parts, which is convenient for modifying the original plunger pump and reducing the adjustment production cost. To this end, the present invention provides a quick-release pump head with a slot-type split plunger rod, including a pump head and a pump body, the pump head and the pump body have a plunger part inside, the plunger part includes a connected plunger power section and a plunger connecting section, the plunger power section is provided with a semi-through groove extending in the radial direction on the side close to the plunger connecting section, and the plunger connecting section is a clamping part on the side close to the plunger power section, and the clamping part and the semi-through groove cooperate. The method adopts the method of cutting a semi-through groove on the side of the plunger power section close to the plunger connecting section for clamping connection with the plunger connecting section, which is conducive to modifying the produced plunger rod and reducing production costs; the plunger connecting section can be connected by aligning the semi-through groove from the radial direction and clamping it into the semi-through groove, and the clamping groove connection is convenient for disassembly and assembly, and is convenient for repeated disassembly and installation, disinfection and washing during use; the plunger connecting section is provided with a clamping part that cooperates with the semi-through groove, and the clamping part can be cut and modified on the basis of the original plunger connecting section, thereby reducing production costs and reducing the parts required for assembling the plunger connecting section and the plunger power section.

[0004] Preferably, the half-through groove includes a notch portion and a groove bottom portion, and the half-through groove is located on one side close to the plunger connection section, and the width of the notch portion is smaller than the width of the groove bottom portion. For a plunger pump, the fluid delivery work of the pump head depends on the linear motion of the plunger rod inside the pump head and the pump body, and the plunger rod mainly bears the axial load. The notch portion of the half-through groove is used to limit the axial motion of one side of the clamping joint of the plunger connection section, and the other side of the clamping joint contacts with the main part of the plunger power section to limit the axial motion of the other side of the clamping joint, so as to avoid the plunger rod from colliding with the structures on both sides due to inertia during the conversion of different strokes, resulting in uneven inflection points of the stroke curve of the plunger rod, fluctuations in pressure changes inside the pump head, and fluctuations in flow during fluid delivery.

[0005] Preferably, the clamping part includes a clamping joint part and a clamping neck part, the clamping joint part and the groove bottom part cooperate, the clamping neck part and the notch part cooperate, and the clamping joint part and the plunger power section are coaxial. The clamping joint part and the groove bottom part cooperate, that is, the axial clearance between the clamping joint part and the groove bottom part is as small as possible, so as to avoid the clamping joint part from colliding with the structures on both sides due to inertia during the conversion of different strokes of the plunger rod, and the existence of the gap will cause the plunger power section and the clamping joint part to have a stroke difference, that is, the plunger power section moves axially, the clamping joint part does not move, and the fluid delivery at the pump head fails to respond to the power system of the plunger pump in time. Further, in order to control the axial clearance, the side of the clamping joint part away from the notch part can be a spherical surface, which reduces the matching area, reduces the processing difficulty of the clamping joint part and the plunger power section, and is convenient for controlling the axial clearance.

[0006] Preferably, the semi-through groove includes a closed end and an open end, one end of the outer wall of the semi-through groove connected to the plunger power section is the open end, the mating surfaces of the closed end and the clamp joint are both cambered surfaces, and the curvature radius of the closed end is greater than the curvature radius of the clamp joint. The mating surfaces of the closed end and the clamp joint are cambered surfaces, which facilitates the assembly and self-centering of the clamp joint, and can ensure that the plunger power section and the plunger connection section are coaxial; the curvature radius of the closed end is greater than the curvature radius of the clamp joint, and only two axial surfaces of the clamp joint contact the plunger power section, which facilitates the clamp joint to be inserted into the semi-through groove, and during the assembly process, the clamp joint can roll to the lowest point of the closed end due to gravity, completing the self-centering effect, avoiding the coaxiality check after each installation, and reducing the difficulty of assembly.

[0007] Preferably, the mating surfaces of the clamping neck and the notch are both cambered surfaces, and the curvature radius of the mating surface of the notch is greater than the curvature radius of the clamping neck. To avoid radial over-positioning and achieve self-centering function, the mating surfaces of the clamping neck and the notch are also cambered surfaces, and the curvature radius of the mating surface of the notch is greater than the curvature radius of the clamping neck. The plunger connecting section can roll to the coaxial position of the plunger connecting section and the plunger power section due to gravity, reducing the difficulty of assembly; the plunger connecting section and the plunger power section are coaxial, which can avoid the plunger connecting section from being deflected and worn against the pump head and the pump body due to uneven force during the process of transmitting the linear displacement of the plunger power section.

[0008] Preferably, the axial length of the clamping neck is greater than the axial length of the slot portion, and the axial length of the clamping joint portion matches the axial length of the slot bottom portion. The above arrangement can prevent the clamping portion from being excessively positioned in the axial direction and the clamping joint portion from moving.

[0009] Preferably, the clamping part also includes a clamping shoulder, and the side of the clamping shoulder close to the clamping neck contacts the plunger power section, and the diameter of the clamping shoulder matches the diameter of the plunger power section. Since the radial dimensions of the clamping joint and the clamping neck are small, the clamping shoulder is provided in contact with the plunger power section, which can ensure the stability of the power transmitted by the plunger connecting section to the plunger power section; in order to prevent the axial over-positioning of the clamping part, there is a small gap filled with lubricating oil between the plunger connecting section and the plunger power section, and the clamping shoulder increases the contact surface between the plunger connecting section and the plunger power section, so that the oil film in the gap is increased, which can fully absorb the impact force generated by the clamping joint part moving at the bottom of the groove due to the processing error, and reduce the stroke difference between the plunger connecting section and the plunger power section.

[0010] Preferably, the pump body includes a second pump body and a first pump body detachably connected to the pump head, and a clamp body surrounds the outer side of the connection between the first pump body and the second pump body, and the clamp body is provided with an opening with a fastener, and the opening degree of the opening can be adjusted by the fastener. A clamp body is provided at the connection between the first pump body and the second pump body, and the clamp body surrounds the connection to improve the sealing of the connection and solve the problem of fluid leakage inside the pump head and the pump body; because the interior of the first pump body is connected to the pump head and the second pump body respectively, there is a pressure difference between the pump head and the second pump body, which avoids opening a connection hole in the first pump body as a connection method between the second pump body and the first pump body, maintains the structural strength of the first pump body, and avoids damage to the first pump body.

[0011] Preferably, one end of the fastener is connected to the limit piece by a connecting pin, and the connecting pin has an angle with the plane where the clamp body is located. Since the connecting pin has an angle with the plane where the clamp body is located, the limit piece can rotate around the connecting pin. When it rotates to a special angle, if the fastener needs to adjust the opening, the limit piece will interfere with the clamp body and the fastener will be locked. Furthermore, the connecting pin is perpendicular to the plane where the clamp body is located, and when the limit piece fits the clamp body, the fastener is locked. Therefore, the connection strength of the clamp body to the first pump body and the second pump body can be judged by the position of the limit piece, solving the problem that the gap at the connection between the first pump body and the second pump body is difficult to observe, and the problem that the clamp body blocks the gap at the connection between the first pump body and the second pump body and cannot observe the gap.

[0012] The present invention provides a quick-release pump head with a slot-type split plunger rod, which makes the pump head and the matching plunger rod replaceable parts, reduces the number of parts of the split plunger rod, simplifies assembly steps, and reduces the time cost of disinfection and cleaning. Secondly, it reduces the impact caused by the gap between the plunger power section and other plunger parts during the stroke conversion period; reduces the number of wearing parts and extends the service life of the plunger pump; can be cut and manufactured on the basis of the original parts, which is convenient for modifying the original plunger pump and reducing the adjustment production cost, and has the following beneficial effects: it avoids the impact of the clamping joint part on the structure on both sides due to inertia during the conversion of the plunger rod to different strokes, resulting in uneven inflection points of the stroke curve of the plunger rod, fluctuations in the pressure change inside the pump head, and fluctuations in the flow rate during the fluid delivery process; it avoids the stroke difference between the plunger power section and the clamping joint part, that is, the plunger power section moves axially, the clamping joint part does not move, and the fluid delivery at the pump head fails to respond to the power system of the plunger pump in time; realizes the self-centering function, avoids the plunger connecting section from being deflected and worn by the pump head and the pump body due to uneven force during the transmission of the linear displacement of the plunger power section. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] 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 described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0014] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 is a schematic cross-sectional structural diagram of the opening of the clamp body of the present invention; Figure 3 It is a structural schematic diagram of the plunger part of the present invention; Figure 4 It is a cross-sectional structural schematic diagram of the plunger part of the present invention; Figure 5 It is a schematic cross-sectional structural diagram of the BB portion of the present invention; Figure 6 It is a schematic cross-sectional structural diagram of CC of the present invention; Figure 7 It is a structural schematic diagram of the plunger power section of the present invention; Figure 8 It is a schematic structural diagram of the plunger connecting section of the present invention.

[0015] Explanation of the reference numerals: 1 second pump body; 2 first pump body; 3 pump head; 4 plunger part; 401 plunger power section; 402 plunger connecting section; 403 clamping joint; 404 clamping neck; 405 clamping shoulder; 406 groove bottom part; 407 notch part; 5 limiter; 6 fastener; 7 clamp body; 8 connecting pin. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0017] Embodiment 1 Combination Figure 1 and Figure 3 As shown, a quick-release pump head with a slot-type split plunger rod includes a pump head 3 and a pump body, the pump body includes a second pump body 1 and a first pump body 2 detachably connected to the pump head 3, a clamp 7 is surrounded on the outside of the connection between the first pump body 2 and the second pump body 1, the pump head 3 and the pump body have a plunger part 4 inside, the plunger part 4 includes a connected plunger power section 402 and a plunger connecting section, the plunger power section 402 is provided with a semi-through groove extending in a radial direction on one side close to the plunger connecting section, the plunger connecting section is a clamping part on the side close to the plunger power section 402, and the clamping part and the semi-through groove cooperate. The method of cutting a half-through groove on the side of the plunger power section 402 close to the plunger connecting section and snapping it into the plunger connecting section is beneficial to modifying the produced plunger rod and reducing production costs; the plunger connecting section can be connected by aligning the half-through groove from the radial direction and snapping it into the half-through groove. The slot connection is convenient for disassembly and assembly, and is convenient for repeated disassembly, installation, disinfection and washing during use; the plunger connecting section is provided with a snap-fitting portion to cooperate with the half-through groove, and the snap-fitting portion can be cut and modified on the basis of the original plunger connecting section, thereby reducing production costs and reducing the parts required for assembling the plunger connecting section and the plunger power section 402.

[0018] like Figure 4 As shown, the half-through groove includes a notch portion 407 and a groove bottom portion 406. The half-through groove is close to the plunger connecting section and the notch portion 407 is smaller in width than the groove bottom portion 406. The clamping portion includes a clamping joint portion 403 and a clamping neck portion 404. The clamping joint portion 403 and the groove bottom portion 406 are matched, the clamping neck portion 404 and the notch portion 407 are matched, and the clamping joint portion 403 and the plunger power section 402 are coaxial.

[0019] For the plunger pump, the fluid delivery work of the pump head 3 depends on the axial linear motion of the plunger rod inside the pump head 3 and the pump body. The plunger rod mainly bears the axial load. The notch part 407 of the semi-through groove is used to limit the axial movement of one side of the clamping joint part 403 of the plunger connecting section. The other side of the clamping joint part 403 contacts the main part of the plunger power section 402 to limit the axial movement of the other side of the clamping joint part 403, so as to avoid the impact of the clamping joint part 403 and the impact of the structure on both sides due to inertia during the conversion of different strokes of the plunger rod, resulting in the inflection point of the stroke curve of the plunger rod being uneven, the pressure change inside the pump head 3 fluctuates, and the flow rate fluctuates during the fluid delivery process.

[0020] In this embodiment, the clamp joint part 403 and the groove bottom part 406 are matched, that is, the axial clearance between the clamp joint part 403 and the groove bottom part 406 is as small as possible, so as to avoid the clamp joint part 403 from colliding with the structures on both sides due to inertia during the conversion of different strokes of the plunger rod, and the existence of the gap will cause the plunger power section 402 and the clamp joint part 403 to have a stroke difference, that is, the plunger power section 402 moves axially, and the clamp joint part 403 does not move, and the fluid delivery at the pump head 3 fails to respond to the power system of the plunger pump in time. Further, in order to control the axial clearance, the side of the clamp joint part 403 away from the notch part 407 can be a spherical surface to reduce the matching area, reduce the processing difficulty of the clamp joint part 403 and the plunger power section 402, and facilitate the control of the axial clearance.

[0021] like Figure 5 As shown, the semi-through groove includes a closed end and an open end, and one end of the outer wall of the semi-through groove connected to the plunger power section 402 is the open end, and the mating surfaces of the closed end and the clamp joint part 403 are both cambered surfaces, and the curvature radius of the closed end is greater than the curvature radius of the clamp joint part 403. The mating surfaces of the closed end and the clamp joint part 403 are cambered surfaces, which facilitates the assembly and self-centering of the clamp joint part 403, and can ensure that the plunger power section 402 and the plunger connection section are coaxial; the curvature radius of the closed end is greater than the curvature radius of the clamp joint part 403, and the clamp joint part 403 has only two axial surfaces in contact with the plunger power section 402, which facilitates the clamp joint part 403 to be inserted into the semi-through groove, and during the assembly process, the clamp joint part 403 can roll to the lowest point of the closed end due to gravity, completing the self-centering effect, avoiding the coaxiality check after each installation, and reducing the difficulty of assembly.

[0022] like Figure 6As shown, the matching surfaces of the clamping neck 404 and the notch portion 407 are both cambered surfaces, and the curvature radius of the matching surface of the notch portion 407 is greater than the curvature radius of the clamping neck 404. In order to avoid radial over-positioning and realize the self-centering function, the matching surfaces of the clamping neck 404 and the notch portion 407 are also cambered surfaces, and the curvature radius of the matching surface of the notch portion 407 is greater than the curvature radius of the clamping neck 404. The plunger connecting section can roll to the coaxial position of the plunger connecting section and the plunger power section 402 due to gravity, reducing the difficulty of assembly; the plunger connecting section and the plunger power section 402 are coaxial, which can prevent the plunger connecting section from being deflected and worn by the pump head 3 and the pump body due to uneven force during the process of transmitting the linear displacement of the plunger power section 402.

[0023] like Figure 4 As shown, the axial length of the clamping neck 404 is greater than the axial length of the slot portion 407, and the axial length of the clamping joint 403 matches the axial length of the groove bottom portion 406. With the above arrangement, the axial over-positioning of the clamping portion and the movement of the clamping joint 403 can be prevented.

[0024] like Figure 4 As shown, the clamping part also includes a clamping shoulder 405, and the side of the clamping shoulder 405 close to the clamping neck 404 contacts the plunger power section 402, and the diameter of the clamping neck 405 matches the diameter of the plunger power section 402. Since the radial dimensions of the clamping joint 403 and the clamping neck 404 are small, the clamping shoulder 405 is provided to contact the plunger power section 402, which can ensure the stability of the plunger connecting section transmitting the power of the plunger power section 402; in order to prevent the axial over-positioning of the clamping part, there is a small gap filled with lubricating oil between the plunger connecting section and the plunger power section 402, and the clamping shoulder 405 increases the contact surface between the plunger connecting section and the plunger power section 402, so that the oil film in the gap is increased, which can fully absorb the impact force generated by the clamping joint 403 moving in the groove bottom part 406 due to the processing error, and reduce the stroke difference between the plunger connecting section and the plunger power section 402.

[0025] Combination Figure 1 and Figure 2 As shown, the clamp body 7 is provided with an opening with a fastener 6, and the opening degree of the opening can be adjusted by the fastener 6. The connection between the first pump body 2 and the second pump body 1 is provided with a clamp body 7, and the clamp body 7 is arranged in a manner of surrounding the connection to improve the sealing of the connection and solve the problem of fluid leakage between the pump head 3 and the pump body; since the interior of the first pump body 2 is connected with the pump head 3 and the second pump body 1 respectively, there is a pressure difference between the pump head 3 and the second pump body 1, so it is avoided to open a connection hole in the first pump body 2 as a connection method between the second pump body 1 and the first pump body 2, maintain the structural strength of the first pump body 2, and avoid damage to the first pump body 2.

[0026] One end of the fastener 6 is connected to the limiter 5 by a connecting pin 8, and the connecting pin 8 has an angle with the plane where the clamp body 7 is located. Since the connecting pin 8 and the clamp body 7 are located at an angle in the plane, the limiter 5 can rotate around the connecting pin 8. When it rotates to a special angle, if the fastener 6 needs to adjust the opening, the limiter 5 will interfere with the clamp body 7, and the fastener 6 will be locked. Furthermore, the connecting pin 8 is perpendicular to the plane where the clamp body 7 is located. When the limiter 5 fits the clamp body 7, the fastener 6 is locked. Therefore, the connection strength of the clamp body 7 to the first pump body 2 and the second pump body 1 can be judged by the position of the limiter 5, solving the problem that the gap at the connection between the first pump body 2 and the second pump body 1 is difficult to observe, and the problem that the clamp body 7 blocks the gap at the connection between the first pump body 2 and the second pump body 1 and cannot observe.

[0027] The present invention provides a quick-release pump head with a slot-type split plunger rod, which makes the pump head 3 and the matching plunger rod replaceable, reduces the number of parts of the split plunger rod, simplifies assembly steps, and reduces the time cost of disinfection and cleaning. Secondly, the impact caused by the gap between the plunger power section 402 and other plunger parts 4 during the stroke conversion period is reduced; the number of wearing parts is reduced and the service life of the plunger pump is extended; it can be cut and manufactured on the basis of the original parts, which is convenient for modifying the original plunger pump and reducing the adjustment production cost, and has the following beneficial effects: it is prevented that during the conversion of the plunger rod to different strokes, the clamping joint part 403 collides with the structures on both sides due to inertia, resulting in uneven inflection points of the stroke curve of the plunger rod, fluctuations in the pressure change inside the pump head 3, and fluctuations in the flow rate during the fluid delivery process; it is prevented that there is a stroke difference between the plunger power section 402 and the clamping joint part 403, that is, the plunger power section 402 moves axially, the clamping joint part 403 does not move, and the fluid delivery at the pump head 3 fails to respond to the power system of the plunger pump in time; it realizes the self-centering function, and prevents the plunger connecting section from being deflected and worn by the pump head 3 and the pump body due to uneven force during the transmission of the linear displacement of the plunger power section 402.

[0028] The above embodiments and / or implementation methods 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 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.

Claims

1. A quick-release pump head with a slot-type split plunger rod, comprising a pump head (3) and a pump body, wherein the pump head (3) and the pump body have a plunger part (4) inside, characterized in that: The plunger portion (4) comprises a connected plunger power section (401) and a plunger connecting section (402); a semi-through groove extending in a radial direction is provided on a side of the plunger power section (401) close to the plunger connecting section (402); a clamping portion is provided on a side of the plunger connecting section (402) close to the plunger power section (401); the clamping portion cooperates with the semi-through groove.

2. A quick-release pump head (3) with a slot-type split plunger rod according to claim 1, characterized in that: The semi-through groove comprises a notch portion (407) and a groove bottom portion (406); the notch portion (407) is located on a side of the semi-through groove close to the plunger connecting section (402); and the width of the notch portion (407) is smaller than the width of the groove bottom portion (406).

3. A quick-release pump head with a slot-type split plunger rod according to claim 2, characterized in that: The clamping portion comprises a clamping joint portion (403) and a clamping neck portion (404); the clamping joint portion (403) cooperates with the groove bottom portion (406); the clamping neck portion (404) cooperates with the notch portion (407); and the clamping joint portion (403) and the plunger power section (401) are coaxial.

4. A quick-release pump head with a slot-type split plunger rod according to claim 3, characterized in that: The semi-through groove comprises a closed end and an open end; one end of the semi-through groove connected to the outer wall of the plunger power section (401) is the open end; the mating surfaces of the closed end and the clamping joint part (403) are both arc surfaces; and the curvature radius of the closed end is greater than the curvature radius of the clamping joint part (403).

5. A quick-release pump head with a slot-type split plunger rod according to claim 4, characterized in that: The matching surfaces of the clamping neck portion (404) and the notch portion (407) are both arc surfaces, and the curvature radius of the matching surface of the notch portion (407) is greater than the curvature radius of the clamping neck portion (404).

6. A quick-release pump head with a slot-type split plunger rod according to claim 4, characterized in that: The axial length of the clamping neck portion (404) is greater than the axial length of the notch portion (407), and the axial length of the clamping joint portion (403) matches the axial length of the groove bottom portion (406).

7. A quick-release pump head with a slot-type split plunger rod according to claim 3, characterized in that: The clamping portion further comprises a clamping shoulder (405), wherein a side of the clamping shoulder (405) close to the clamping neck (404) contacts the plunger power section (401), and a diameter of the clamping shoulder (405) matches a diameter of the plunger power section (401).

8. A quick-release pump head with a slot-type split plunger rod according to claim 1, characterized in that: The pump body comprises a second pump body (1) and a first pump body (1) detachably connected to the pump head (3); a clamp body (7) surrounds the outer side of the connection between the first pump body (1) and the second pump body (1); the clamp body (7) is provided with an opening having a fastener (6); and the opening degree of the opening can be adjusted by using the fastener (6).

9. A quick-release pump head with a slot-type split plunger rod according to claim 8, characterized in that: One end of the fastener (6) is connected to the limiter (5) by means of a connecting pin (8), and the connecting pin (8) and the plane where the clamp body (7) is located have an angle.

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