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 present invention relates to the technical field of plunger pumps, and provides a quick-release pump head with a grooved split plunger rod. Background Art

[0002] Conventionally, pumps suitable for fluid transportation in the high-standard sanitation industry 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 requirements of high pressure, high flow rate, constant flow, and constant pressure needed for industrial production. Therefore, a plunger pump needs to be selected to provide a suitable production environment. However, most traditional plunger pumps have an integral plunger rod and a non-detachable pump head connected by welding, etc., resulting in high manufacturing costs and difficult maintenance of traditional plunger pumps, and they cannot meet the sanitation requirements and diverse flow rate requirements of the food, pharmaceutical, and biopharmaceutical chemical industries. The prior art CN114645845B discloses a plunger assembly and a plunger pump. The plunger assembly of the present invention includes: a plunger rod, one end of the plunger rod having a first flange; a slider rod, one end of the slider rod having a second flange; and a connecting ring, the connecting ring including a first half-ring and a second half-ring that are detachably connected, a first groove being provided on the inner wall surface of the first half-ring, a second groove being provided on the inner wall surface of the second half-ring, 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 many assembly parts and a high failure rate. The inventor believes that there is great room for improvement in the prior art. Summary of the Invention

[0003] The object of the present invention is to make the pump head and the matching plunger rod replaceable parts, and to reduce the number of components of the split plunger rod. The plunger part is radially snapped in to complete the assembly, simplifying the assembly steps and reducing the time cost of disinfection and cleaning. Secondly, it reduces the impact generated during the stroke conversion due to the gap between the plunger power section and other plunger parts; reduces the number of vulnerable parts and extends the service life of the plunger pump; can be machined on the basis of the original parts, facilitating the modification of the original plunger pump and reducing the adjustment production cost. For this purpose, the present invention provides a quick-release pump head with a grooved split plunger rod, which includes 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 connection section. A semi-through groove extending in the radial direction is provided on one side of the plunger power section close to the plunger connection section. The side of the plunger connection section close to the plunger power section is a clamping part, and the clamping part cooperates with the semi-through groove; the pump body includes a first pump body and a second pump body detachably connected to the pump head, and a clamp body is surrounded outside the connection between the second pump body and the first pump body. Cutting a semi-through groove on one side of the plunger power section close to the plunger connection section for clamping connection is beneficial for modifying the already produced plunger rod and reducing the production cost; the plunger connection section can be connected by radially aligning and snapping into the semi-through groove. The grooved connection is convenient for disassembly and assembly, and is convenient for repeated disassembly, installation, disinfection and washing during use; the clamping part is provided on the plunger connection section to cooperate with the semi-through groove, and the clamping part can be machined and modified on the basis of the original plunger connection section, reducing the production cost and the number of components required for the assembly of the plunger connection section and the plunger power section; the clamping part can rotate axially in the semi-through groove.

[0004] Preferably, the semi-through groove includes a groove opening part and a groove bottom part. The side of the semi-through groove close to the plunger connection section is the groove opening part, and the width of the groove opening part is smaller than the width of the groove bottom part. For a plunger pump, the fluid delivery work of the pump head depends on the plunger rod moving in a straight line along the axis inside the pump head and the pump body. The plunger rod mainly bears the axial load. The groove opening part of the semi-through groove is used to limit the axial movement of one side of the clamping head of the plunger connection section, and the other side of the clamping head contacts the main body part of the plunger power section to limit the axial movement of the other side of the clamping head, avoiding the impact caused by the clamping head hitting the structures 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 not being smooth, the internal pressure of the pump head changing fluctuatingly, and the flow rate fluctuating during the fluid delivery process.

[0005] Preferably, the clamping part includes a clamping head and a clamping neck. The clamping head cooperates with the bottom part of the groove, the clamping neck cooperates with the notch part of the groove, and the clamping head and the plunger power section are coaxial. The cooperation between the clamping head and the bottom part of the groove means that the axial clearance between the clamping head and the bottom part of the groove is as small as possible, avoiding the impact caused by the clamping head hitting the structures on both sides due to inertia during the conversion of different strokes of the plunger rod, and the existence of clearance will result in a stroke difference between the plunger power section and the clamping head, that is, when the plunger power section moves axially, the clamping head does not move, and the fluid delivery at the pump head fails to respond to the power system of the plunger pump in a timely manner. Further, in order to control the axial clearance, the side of the clamping head away from the notch part can be spherical, reducing the mating area, lowering the processing difficulty of the clamping head and the plunger power section, and facilitating the control of the axial clearance.

[0006] Preferably, the semi-through groove includes a closed end and an open end. The open end of the semi-through groove communicates with one end of the outer wall of the plunger power section. The mating surfaces of the closed end and the clamping head are both arc surfaces, and the radius of curvature of the closed end is greater than that of the clamping head. The mating surfaces of the closed end and the clamping head being arc surfaces facilitates the assembly of the clamping head and self-centering, and can ensure the coaxiality of the plunger power section and the plunger connecting section; the radius of curvature of the closed end is greater than that of the clamping head, and the clamping head only contacts the plunger power section with two axial surfaces, which is convenient for the clamping head to be inserted into the semi-through groove, and during the assembly process, the clamping head can roll to the lowest point of the closed end by gravity to complete the self-centering effect, avoiding the coaxiality check after each installation and reducing the assembly difficulty.

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

[0008] Preferably, the axial length of the clamping neck is greater than that of the notch part, and the axial length of the clamping head matches that of the bottom part of the groove. With the above settings, it is possible to prevent the axial over-positioning of the clamping part and the camming of the clamping head.

[0009] Preferably, the clamping part further includes a clamping shoulder. One 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 head and the clamping neck are small, setting the clamping shoulder to contact the plunger power section can ensure the stability of the plunger connecting section in transmitting the power of the plunger power section. To prevent excessive axial positioning of the clamping part, there is a small gap filled with lubricating oil between the plunger connecting section and the plunger power section. The clamping shoulder increases the contact surface between the plunger connecting section and the plunger power section, enlarging the oil film in the gap, which can fully absorb the impact force generated by the movement of the clamping head at the bottom of the groove due to machining errors, and reduce the stroke difference between the plunger connecting section and the plunger power section.

[0010] Preferably, the pump body includes a first pump body and a second pump body detachably connected to the pump head. The outside of the connection between the first pump body and the second pump body is surrounded by a clamp body. The clamp body is provided with an opening with a fastener, and the opening degree can be adjusted by the fastener. The clamp body is provided at the connection between the first pump body and the second pump body. The clamp body surrounds the connection, improving the sealing performance of the connection and solving the problem of fluid leakage inside the pump head and the pump body. Since the inside of the second pump body is respectively connected to the pump head and the second pump body, there is a pressure difference between the pump head and the second pump body. Avoiding opening a connection hole in the second pump body as the connection method between the second pump body and the second pump body maintains the structural strength of the second pump body and prevents the second pump body from being damaged.

[0011] Preferably, one end of the fastener is connected to a limiting member 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 limiting member can rotate around the connecting pin. When rotated to a special angle, if the fastener needs to adjust the opening degree, the limiting member will interfere with the clamp body and the fastener will be locked. Further, when the connecting pin is perpendicular to the plane where the clamp body is located and the limiting member fits the clamp body, the fastener is locked. Therefore, the connection strength between the clamp body and the second pump body can be judged by the position of the limiting member, solving the problems that it is difficult to observe the gap at the connection between the second pump body and the second pump body, and the gap at the connection between the second pump body and the second pump body is blocked by the clamp body and cannot be observed.

[0012] Preferably, the inner side of the clamp body has a texture, and the connection between the second pump body and the first pump body has a texture matching the inner side of the clamp body. One end of the inner side of the clamp body is provided with a stop body, and the pump body is provided with a recess for cooperating with the stop body. The clamp body is fixed to the recess of the pump body by the fastener axially passing through the stop body.

[0013] The present invention provides a quick-release pump head with a slot-type split plunger rod, making the pump head and the matching plunger rod replaceable parts, reducing the number of components of the split plunger rod, simplifying the assembly steps, and reducing the time cost of disinfection and cleaning. Secondly, it reduces the impact generated during the stroke conversion period due to the gap between the plunger power section and other plunger parts; reduces the number of vulnerable parts and extends the service life of the plunger pump; can be machined on the basis of the original parts, facilitating the modification of the original plunger pump, reducing the adjustment production cost, and having the following beneficial effects: avoiding the impact caused by the inertial collision of the clamping head with the structures on both sides during the different stroke conversions of the plunger rod, resulting in non-smooth inflection points of the stroke curve of the plunger rod, fluctuations in the internal pressure of the pump head, and fluctuations in the flow rate during the fluid delivery process; avoiding the stroke difference between the plunger power section and the clamping head, that is, the axial movement of the plunger power section while the clamping head does not move, and the fluid delivery at the pump head fails to respond to the power system of the plunger pump in a timely manner; realizing the self-centering function, avoiding the wear of the plunger connection section with the pump head and the pump body due to uneven force during the transmission of the linear displacement of the plunger power section, resulting in the deviation of the plunger connection section. 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 only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can be obtained by extending according to the provided drawings.

[0015] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a sectional structural diagram of the present invention along the first hole body; Figure 3 is a schematic structural diagram of the clamp body of the present invention; Figure 4 is a sectional structural diagram of the opening of the clamp body of the present invention; Figure 5 is a schematic structural diagram of the plunger part of the present invention; Figure 6 is a sectional structural diagram of the plunger part of the present invention; Figure 7 is a sectional structural diagram of the present invention at B-B; Figure 8 is a sectional structural diagram of the present invention at C-C; Figure 9 is a schematic structural diagram of the plunger power section of the present invention; Figure 10 is a schematic structural diagram of the plunger connection section of the present invention; Figure 11 Schematic structural diagram of the second embodiment of the present invention; Figure 12 Cross-sectional structural diagram of the second embodiment of the present invention.

[0016] Description of reference numerals: 1 First pump body; 2 Second pump body; 3 Pump head; 4 Plunger part; 401 Plunger power section; 402 Plunger connection section; 403 Clamping head; 404 Clamping neck; 405 Clamping shoulder; 406 Groove bottom part; 407 Groove opening part; 5 Limiting part; 6 Fastening part; 7 Clamping body; 8 Connecting pin; 9 First hole body; 10 Blocking body. Detailed implementation manners

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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 3 As shown, a quick-release pump head with a grooved split plunger rod includes a pump head 3 and a pump body. The pump body includes a first pump body 1 and a second pump body 2 detachably connected to the pump head 3. A clamping body 7 is wound around the outside of the connection between the second pump body 2 and the first pump body 1. A plunger part 4 is provided inside the pump head 3 and the pump body. The plunger part 4 includes a connected plunger power section 401 and a plunger connection section 402. A semi-through groove extending in the radial direction is provided on the side of the plunger power section 401 close to the plunger connection section 402. The side of the plunger connection section 402 close to the plunger power section 401 is a clamping part, and the clamping part cooperates with the semi-through groove. By cutting a semi-through groove on the side of the plunger power section 401 close to the plunger connection section 402 for clamping, it is beneficial to modify the existing plunger rod and reduce production costs; the plunger connection section 402 can be connected by simply aligning and snapping into the semi-through groove in the radial direction. The grooved connection is convenient for disassembly and assembly, and is convenient for repeated disassembly, installation, disinfection and washing during use; the clamping part of the plunger connection section 402 is provided to cooperate with the semi-through groove, and the clamping part can be machined and modified on the basis of the original plunger connection section 402, reducing production costs and the number of parts required for the assembly of the plunger connection section 402 and the plunger power section 401.

[0019] As Figure 4 shown, the semi-through groove includes a groove opening part 407 and a groove bottom part 406. The side of the semi-through groove close to the plunger connection section 402 is the groove opening part 407, and the width of the groove opening part 407 is smaller than the width of the groove bottom part 406. The clamping part includes a clamping head 403 and a clamping neck 404. The clamping head 403 cooperates with the groove bottom part 406, the clamping neck 404 cooperates with the groove opening part 407, and the clamping head 403 is coaxial with the plunger power section 401.

[0020] For a plunger pump, the fluid delivery work of the pump head 3 depends on the linear movement of the plunger rod along the axis inside the pump head 3 and the pump body. The plunger rod mainly bears axial loads. The notch part 407 of the semi-through groove restricts the axial movement of one side of the clamping head 403 of the plunger connecting section 402. The other side of the clamping head 403 contacts the main body part of the plunger power section 401 to restrict the axial movement of the other side of the clamping head 403, avoiding the impact caused by the clamping head 403 hitting the structures 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 non-smooth, the internal pressure change of the pump head 3 fluctuating, and the flow rate fluctuating during the fluid delivery process.

[0021] In this embodiment, the clamping head 403 and the bottom part 406 of the groove cooperate, that is, the axial clearance between the clamping head 403 and the bottom part 406 is as small as possible, avoiding the impact caused by the clamping head 403 hitting the structures on both sides due to inertia during the conversion of different strokes of the plunger rod, and the existence of clearance will cause a stroke difference between the plunger power section 401 and the clamping head 403, that is, the plunger power section 401 moves axially while the clamping head 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 clamping head 403 away from the notch part 407 can be spherical, reducing the mating area, lowering the processing difficulty of the clamping head 403 and the plunger power section 401, and facilitating the control of the axial clearance.

[0022] As Figure 5 shown, the semi-through groove includes a closed end and an open end. The open end of the semi-through groove is connected to the outer wall of the plunger power section 401. The mating surfaces of the closed end and the clamping head 403 are both arc surfaces, and the radius of curvature of the closed end is greater than that of the clamping head 403. The mating surfaces of the closed end and the clamping head 403 being arc surfaces facilitates the assembly of the clamping head 403 and self-centering, and can ensure that the plunger power section 401 and the plunger connecting section 402 are coaxial; the radius of curvature of the closed end is greater than that of the clamping head 403, and the clamping head 403 only contacts the plunger power section 401 with two axial surfaces, facilitating the clamping head 403 to be inserted into the semi-through groove, and during the assembly process, the clamping head 403 can roll to the lowest point of the closed end by gravity by itself to complete the self-centering effect, avoiding the coaxiality check after each installation and reducing the assembly difficulty.

[0023] As Figure 6As shown, the mating surfaces of the clamping neck 404 and the notch portion 407 are both arc surfaces, and the radius of curvature of the mating surface of the notch portion 407 is greater than that of the clamping neck 404. To avoid excessive radial positioning and achieve self-centering function, the mating surfaces of the clamping neck 404 and the notch portion 407 are also both arc surfaces, and the radius of curvature of the mating surface of the notch portion 407 is greater than that of the clamping neck 404. The plunger connecting section 402 can roll to the coaxial position of the plunger connecting section 402 and the plunger power section 401 by itself due to gravity, reducing the assembly difficulty; the plunger connecting section 402 and the plunger power section 401 are coaxial, which can prevent the plunger connecting section 402 from skewing and wearing against the pump head 3 and the pump body during the process of transmitting the linear displacement of the plunger power section 401 due to uneven force.

[0024] As Figure 4 shown, the axial length of the clamping neck 404 is greater than that of the notch portion 407, and the axial length of the clamping head 403 matches that of the bottom portion 406 of the notch. With the above settings, it is possible to prevent excessive axial positioning of the clamping part and the movement of the clamping head 403.

[0025] As Figure 4 shown, the clamping part further includes a clamping shoulder 405. The side of the clamping shoulder 405 close to the clamping neck 404 contacts the plunger power section 401, and the diameter of the clamping neck 405 matches the diameter of the plunger power section 401. Since the radial dimensions of the clamping head 403 and the clamping neck 404 are small, setting the clamping shoulder 405 to contact the plunger power section 401 can ensure the stability of the plunger connecting section 402 in transmitting the power of the plunger power section 401; since excessive axial positioning of the clamping part is prevented, there is a small gap filled with lubricating oil between the plunger connecting section 402 and the plunger power section 401. The clamping shoulder 405 increases the contact surface between the plunger connecting section 402 and the plunger power section 401, increasing the oil film in the gap, which can fully absorb the impact force generated by the movement of the clamping head 403 due to machining errors in the bottom portion 406 of the notch, and reduce the stroke difference between the plunger connecting section 402 and the plunger power section 401.

[0026] Combined Figure 1 、 Figure 2 and Figure 3 shown, the clip body 7 is provided with an opening having a fastener 6, and the opening degree can be adjusted by the fastener 6. A clip body 7 is provided at the connection between the second pump body 2 and the first pump body 1. The clip body 7 surrounds the connection to improve the sealing performance of the connection and solve the problem of fluid leakage inside the pump head 3 and the pump body; since the inside of the second pump body 2 is respectively connected to the pump head 3 and the first pump body 1, there is a pressure difference between the pump head 3 and the first pump body 1. Avoid opening a connection hole in the second pump body 2 as the connection method between the first pump body 1 and the second pump body 2, maintain the structural strength of the second pump body 2, and avoid damage to the second pump body 2.

[0027] One end of the fastener 6 is connected to the limiting member 5 by a connecting pin 8, and the connecting pin 8 has an angle with the plane where the clamping body 7 is located. Since the connecting pin 8 has an angle with the plane where the clamping body 7 is located, the limiting member 5 can rotate around the connecting pin 8. When it rotates to a special angle, if the fastener 6 needs to adjust the opening degree, the limiting member 5 will interfere with the clamping body 7, and the fastener 6 will be locked. Further, when the connecting pin 8 is perpendicular to the plane where the clamping body 7 is located and the limiting member 5 fits the clamping body 7, the fastener 6 is locked. Therefore, the connection strength of the clamping body 7 to the second pump body 2 and the first pump body 1 can be judged by the position of the limiting member 5, solving the problems that it is difficult to observe the gap at the connection of the second pump body 2 and the first pump body 1, and the gap at the connection of the second pump body 2 and the first pump body 1 is blocked by the clamping body 7 and cannot be observed.

[0028] Combined with Figure 1 、 Figure 2 As shown, a first hole body 9 communicating with the plunger portion 4 is provided on the side surface of the second pump body 2, and the first hole body 9 is arranged perpendicular to the axis of the plunger portion 4. The connection state of the plunger power section 401 and the plunger connection section 402 can be observed through the first hole body 9. When it is confirmed that the clamping body is fixed, the plunger connection section 402 and the plunger power section are coaxial, ensuring the coaxiality of the cavity of the plunger portion 4 inside the first pump body 1 and the second pump body 2, and making the connection between the second pump body 2 and the first pump body 1 as smooth as possible to reduce the wear of the plunger rod during movement in the pump body.

[0029] Embodiment 2 Different from Embodiment 1, combined with Figure 11 and Figure 12 As shown, in this embodiment, the inner side of the clamping body 7 has a texture, and the connection between the second pump body 2 and the first pump body 1 has a texture matching the inner side of the clamping body, that is, a continuous external thread is provided at the connection of the first pump body 1 and the second pump body 2, and the inner side of the clamping body 7 has an internal thread matching the external thread. The clamping body 7 can be screwed and fixed on the surfaces of the first pump body 1 and the second pump body 2. A stop body 10 is provided at one end of the inner side of the clamping body 7, and the pump body is provided with a recess for matching with the stop body. The clamping body 7 is axially fixed to the recess of the pump body through the stop body 10 to prevent the thread of the first pump body 1 and the second pump body 2 fixed by the clamping body 7 from disengaging due to vibration during work.

[0030] 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 parts, reduces the number of components of the split plunger rod, simplifies the assembly steps, and reduces the time cost of disinfection and cleaning. Secondly, it reduces the impact generated during the stroke conversion period due to the gap between the plunger power section 402 and the other plunger part 4; reduces the number of vulnerable parts and extends the service life of the plunger pump; can be machined on the basis of the original parts, facilitating the modification of the original plunger pump, reducing the adjustment production cost, and has the following beneficial effects: avoiding the impact caused by the inertial collision of the clamping head 403 with the structures on both sides during the different stroke conversions of the plunger rod, resulting in the inflection point of the stroke curve of the plunger rod being non-smooth and the internal pressure change of the pump head 3 fluctuating, and the flow rate fluctuating during the fluid transportation process; avoiding the stroke difference between the plunger power section 402 and the clamping head 403, that is, the axial movement of the plunger power section 402 while the clamping head 403 does not move, and the fluid transportation at the pump head 3 not responding to the power system of the plunger pump in time; realizing the self-centering function and avoiding the wear of the plunger connection section and 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, resulting in the deviation of the plunger connection section.

[0031] 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 changes 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 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, and the plunger connecting section (402) is clamped into the plunger power section (401) from a radial direction; the pump body comprises a first pump body (1) and a second pump body (2) detachably connected to the pump head (3); a clamping body (7) surrounds the outer side of the connection between the second pump body (2) and the first pump body (1).

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 clamp body (7) is provided with an opening having a fastener (6), and the opening degree of the opening can be adjusted 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.

10. A quick-release pump head with a slot-type split plunger rod according to claim 1, characterized in that: The inner side of the clamp body (7) has a texture, and the connection between the second pump body (2) and the first pump body (1) has a texture matching the inner side of the clamp body (7). A stopper (10) is provided at one end of the inner side of the clamp body (7), and the pump body has a recessed portion matching the stopper (10). The clamp body (7) is fixed to the recessed portion of the pump body by axially passing through the stopper (10) with a fastener.

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