Radial guiding movable ring type detachable pump head

Abstract

The utility model discloses a radial guiding movable ring type detachable pump head, relates to the technical field of plunger pumps, and aims to solve the problems that the energy efficiency utilization rate of a plunger pump is not high, the repeatability of fluid conveying conditions is poor, and the regulation and control stability of interchange use is poor. By arranging the movable ring rod, the pressing piece, the pump body, the pump head and the capacity-variable plunger rod, the utilization rate of the pump body and a power assembly is increased, the strength of the pump body and the design redundancy of power are reduced, and the energy consumption of fluid conveying is reduced; the power adaptability of the pump body power and the fluid conveying pipeline is improved, and the risks of overload damage and insufficient power of the fluid conveying system pipeline are reduced; the risk of critical state sudden change of the conveyed fluid is reduced, and the expansion performance of fluid conveying automation is improved. And by arranging the variable-capacity plunger rod, the self-suction spring, the insertion channel and the power rod, the stability of interchange use of the pump head and the repeatability of fluid transmission conditions are improved.

Description

Technical Field

[0001] This utility model relates to the field of plunger pump technology, specifically to a radially guided, detachable ring-type pump head. Background Technology

[0002] A plunger pump is a conventional fluid displacement mechanical pump. It uses the movement of a plunger rod to change the volume of liquid in the plunger chamber, creating a pressure difference that allows for the absorption and discharge of liquid, thus achieving fluid transfer. In conventional plunger pumps, the plunger rod is fixedly connected to the plunger and cannot be removed from the pump head. For industries with high disinfection requirements, such as hygiene and pharmaceuticals, thorough disinfection is necessary when the equipment is shut down or the conveyed material is changed. The inability to remove the plunger rod from the pump head makes disinfection difficult.

[0003] The pump body centrally and fixedly mounts the plunger rod and sealing components inside the pump body. The power unit drives the plunger rod to reciprocate, thereby absorbing and discharging the transmitted fluid within the integrated fixed pump head structure. In existing conventional plunger pump structures, when the physicochemical properties of the fluid transported by the plunger pump change with varying transmission conditions, the integrated plunger pump typically requires manual removal of the pump head structure fixed to the pump body for maintenance of the internal mechanisms, including the plunger reciprocating motion mechanism, the displacement chamber components, the sealing components, and the flow distribution structure.

[0004] Existing plunger pumps, after disassembly and maintenance, are often reassembled into a single, fixed unit. In most cases, the maintenance and repair of components can alter the original assembly precision and damage the structure or surface quality of the components. This can affect the fluid transmission conditions and even the physicochemical properties of the fluid, especially in situations involving low flow rates or special fluids. It can make the fluid transmission operation unstable and make it difficult to achieve easily controllable, high-precision, and convenient fluid transmission.

[0005] For example, Chinese invention patent CN106837729B discloses a plunger pump for a hydraulic system. In this invention patent, leakage of the conveyed medium is avoided by isolating the oil chamber and the pump chamber, thereby preventing the medium from wearing the oil chamber. The assembly connection between the plunger structure and the pump chamber housing is equipped with an isolation component to isolate the pump chamber part and the plunger side rod. The two pump body sections are detachably fixedly connected. In this technical solution, the assembly accuracy of the plunger part may be damaged when disassembling and assembling the two pump body sections, which may not meet the requirements for interchangeable use of parts. At the same time, the leakage of the plunger may still exist after the pump body section is replaced, and the interchangeability of pump body parts may not meet the requirements for high-precision and convenient fluid transmission.

[0006] Therefore, there is an urgent need to address these shortcomings by proposing suitable variable displacement pump fluid transfer equipment with good control performance, high transmission accuracy, and stable transmission. Utility Model Content

[0007] The purpose of this invention is to provide a radially guided, detachable ring-type pump head to overcome the shortcomings of existing technologies, such as low energy efficiency of plunger pumps, poor repeatability of fluid delivery conditions, and poor stability of interchangeable use.

[0008] To solve the above-mentioned technical problems, this utility model specifically provides the following technical solution:

[0009] A radially guided, detachable ring-type pump head includes a pump body and a pump head. The pump head has a working chamber, and a plunger rod assembly is provided in the working chamber. The pump body has a power channel and a power component. The power channel accommodates the axial reciprocating motion of the plunger rod assembly. The power component is poweredly connected to the plunger rod assembly. The pump body and the pump head are connected by a surface contact fit. The pump body has a ring rod, and a clamping member is rotatably connected to the other end of the ring rod. The clamping member stabilizes the position of the pump head.

[0010] By incorporating a live ring rod, clamping components, pump body, pump head, and variable displacement plunger rod, the utilization rate of the pump body and power components is improved, the design redundancy of pump body strength and power is reduced, and the energy consumption of fluid transportation is lowered. The power compatibility between the pump body and the fluid transportation pipeline is improved, reducing the risk of pipeline overload damage and insufficient power in the fluid transportation system. The flexibility of fluid transportation system control is enhanced, as are the safety and transportation efficiency of the fluid transportation system. Furthermore, the manufacturing process and material management quality of the pump body are improved, reducing the cost of modifying existing transportation systems. The layout and control accuracy of variable specification fluid transportation systems are improved, reducing the risk of critical state changes in the transported fluid. The convenience and accuracy of fluid transportation feedback control are improved, and the scalability of fluid transportation automation is enhanced.

[0011] Preferably, a live ring rod is hinged to the pump body, and the other end of the live ring rod is threaded to a clamping component.

[0012] Preferably, the clamping element is a wing nut.

[0013] Preferably, the plunger rod assembly consists of a capacitive plunger rod and a power rod. The capacitive plunger rod is slidably connected to one end of the working chamber facing the surface contact connection. A self-priming spring is provided between the other end of the capacitive plunger rod and the pump head. The self-priming spring drives the capacitive plunger rod to expand the volume of the working chamber. The power assembly is powered by the power rod, and the power rod is connected to the capacitive plunger rod to transmit the power to reduce the volume of the working chamber.

[0014] By incorporating a variable displacement plunger rod, a self-priming spring, a power assembly, and a power rod, the rate of negative pressure generation in the variable displacement chamber can be reduced, the risk of sudden changes in the critical state of the transmitted fluid can be decreased, and the stability of interchangeable pump heads can be improved.

[0015] Preferably, the pump body is provided with a plug-in channel, which is connected to the power channel. The plug-in channel provides space for the variable displacement piston rod to move to the power rod.

[0016] Preferably, the pump head is provided with an alignment slider, the pump body is provided with an alignment groove, the alignment slider is slidably connected in the alignment groove, and the alignment groove guides the movement of the capacitive plunger rod in the insertion channel.

[0017] By incorporating a variable-capacity plunger rod, a self-priming spring, a plug-in channel, and a power rod, the operational difficulty of interchangeable pump heads is reduced, the variation in fitting accuracy during interchangeable use is minimized, and the stability of interchangeable pump heads and the repeatability of fluid transmission conditions are improved.

[0018] Preferably, the movement trajectory is in the radial direction of the power channel.

[0019] Preferably, the aligning groove restricts the aligning slider's degree of freedom in the axial direction of the power channel.

[0020] By setting up a live ring rod, clamping parts, power channel, live ring through groove, and alignment slider, the stability and reliability of segmented plunger rod transmission can be improved, the types of plunger rod interchangeable connections can be increased, and the restrictions on plunger rod interchangeable specifications can be reduced.

[0021] It reduces wear and damage to the plunger rod pair during quick-release interchange, improves the repeatability of the relative motion of the plunger pair, and increases the service life of the plunger and the repeatability of fluid transmission conditions.

[0022] Preferably, the pump head is provided with a live ring groove, which provides a space for the live ring rod and restricts the variable displacement plunger rod to remain connected to the power rod in the radial direction of the power channel;

[0023] By setting up a live ring groove, live ring rod, and power channel, the reliability of power transmission through segmented plunger rod docking is improved, the probability of damage to the plunger due to misinterpretation is reduced, and the risk of power transmission disconnection is reduced when pump heads are interchanged. Attached Figure Description

[0024] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the assembly structure of a radially guided, detachable ring-type pump head according to this utility model.

[0026] Figure 2 yes Figure 1 Front view diagram;

[0027] Figure 3 yes Figure 1 A top-down view;

[0028] Figure 4 yes Figure 2 A magnified view of a portion of point A in the middle;

[0029] Figure 5 This is a schematic diagram of the pump head structure;

[0030] Figure 6 yes Figure 5 A side view diagram;

[0031] Figure 7 This is a schematic diagram showing the connection relationship between the plunger cavity and the plunger rod assembly;

[0032] Figure 8 This is a schematic diagram of the pump body.

[0033] Figure 9 yes Figure 8 A top-down view;

[0034] Figure 10 yes Figure 8 Schematic diagram of cross-section at CC;

[0035] Figure 11 This is a three-dimensional structural diagram of the pump body;

[0036] Figure 12 This is a schematic diagram showing the assembly relationship between the power unit and the pump body;

[0037] Figure 13 This is a schematic diagram showing the assembly relationship between the variable displacement plunger rod, the pump body, and the power rod.

[0038] Reference numerals: Pump body 10; Power channel 11; Insertion channel 12; Alignment groove 13; Hinge groove 14; Leak detection hole 15; Hinge post hole 16; Hinge post 17; Liver ring rod 18; Clamping component 19; Pump head 40; Capacitance-variable cavity 41; Plunger cavity 42; Liver ring through groove 43; Alignment slider 44; Distribution hole 45; Plunger rod assembly 60; Capacitance-variable plunger rod 61; Self-priming spring 62; Plunger sealing ring 63; Power rod 64; Power assembly 65. Detailed Implementation

[0039] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0040] The specific embodiments of the present invention described herein are for illustrative purposes only and should not be construed as limiting the present invention in any way. Under the guidance of this invention, those skilled in the art can conceive of any possible modifications based on this invention, and these should all be considered within the scope of this invention. It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element. The terms "mounted," "connected," and "linked" should be interpreted broadly; for example, they can refer to mechanical or electrical connections, or internal connections between two elements, and can be direct or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0042] Example 1

[0043] See attached Figure 1 To be continued Figure 8 Appendix Figure 8 and appendix Figure 12 As shown, this utility model provides a radially guided, detachable ring-type pump head, including a pump body 10 and a pump head 40. The pump head 40 has a working chamber, which absorbs and discharges the pumped fluid through a flow distribution component such as a one-way valve. The working chamber is composed of a capacity-variable chamber 41 and a plunger chamber 42, which are interconnected. A plunger rod assembly 60 is slidably connected in the plunger chamber 42. The plunger rod assembly 60 can adjust the pressure in the working chamber by its axial movement. The pressure change in the communication space between the capacity-variable chamber 41 and the plunger chamber 42 causes fluid flow at the inlet and outlet ends of the flow distribution component such as the one-way valve in the pump head 40. The pump body 10 has a power channel 11, and a power assembly 65 is provided in the pump body 10. The power channel 11 accommodates the axial reciprocating motion of the plunger rod assembly 60. The power assembly 65 is powered to connect to the plunger rod assembly 60, and the power assembly 65 drives the plunger rod assembly 60 to reciprocate axially to provide power for the pump body 10 to transport fluid.

[0044] The pump body 10 and the pump head 40 are connected and cooperate with each other through surface contact. The left end face of the pump body 10 and the right end face of the pump head 40 cooperate with each other. The contact surfaces on the pump body 10 and the contact surfaces on the pump head 40 are positioned corresponding to each other. A hinge groove 14 is provided on the side of the pump body 10. A hinge post 17 is rotatably connected between the upper and lower end walls of the hinge groove 14. A live ring rod 18 is hinged to the hinge post 17. The hinge rotation plane of the live ring rod 18 relative to the pump body 10 is perpendicular to the contact surface between the pump body 10 and the pump head 40. A clamping member 19 is rotatably connected to the left end of the live ring rod 18 through a threaded connection structure. The clamping member 19 can be a wing nut structure. The pump head 40 is located between the left end face of the pump body 10 and the clamping member 19. The clamping member 19 provides a clamping thrust for the surface contact connection between the left end face of the pump body 10 and the right end face of the pump head 40. The clamping thrust provides a frictional force to keep the surface contact mating surfaces stable. When the clamping member 19 rotates forward on the ring rod 18, it provides a rightward clamping thrust to the pump head 40. When the clamping member 19 rotates backward on the ring rod 18, it releases the clamping thrust on the pump head 40. After the clamping member 19 rotates on the ring rod 18 and moves to the end, the ring rod 18 can be rotated on the pump body 10 to adjust the hinge position, thereby avoiding interference between the ring rod 18 and the pump head 40 and the pump body 10. The pump body 10 is provided with a leak detection hole 15, which is connected to the power channel 11. The leak detection hole 15 can be used to check the fluid leakage from the capacitive change chamber to both ends of the power component in real time. The hinge slot 14 is provided with a hinge pin hole 16 in the side wall, which can be used to disassemble and assemble the hinge structure in the hinge slot 14. The side wall of the capacitive change chamber 41 is provided with a flow distribution channel such as a one-way valve. The flow distribution channel is connected to the input end and the output end of the conveyed fluid through the flow distribution hole 45.

[0045] By setting the live ring rod 18 and the clamping part 19 to assemble and disassemble the surface contact connection between the pump body 10 and the pump head 40, the pump body 10 and the pump head 40 can be quickly assembled into a plunger pump as a whole. Different pump heads with different delivery specifications can be switched on the same pump body power component, thereby switching different fluid delivery conditions and delivery specifications, improving the utilization rate of the pump body and power component, reducing the design redundancy of pump body strength and power, and reducing the energy consumption of fluid delivery.

[0046] Improve the power compatibility between the pump body and the fluid delivery pipeline, reduce the risk of overload damage and insufficient power in the fluid delivery system pipeline, improve the adaptability of the fluid delivery system to changes in fluid parameters, improve the stability of the pumped fluid delivery status, improve the flexibility of the fluid delivery system control, and improve the safety and delivery efficiency of the fluid delivery system.

[0047] Improve the interchangeability of pump body components, improve the manufacturing process and material management quality of pump body, reduce the cost of modifying existing conveying systems, improve the layout and control accuracy of variable specification conveying fluid systems, improve the convenience of fluid conveying system layout, maintenance, expansion and upgrading, reduce the possibility of significant changes in the characteristics of fluid itself due to the exceeding of limits in variable specification conveying conditions caused by changes in the parameters of variable displacement pumps, reduce the risk of critical state abrupt changes in the conveyed fluid, improve the convenience and accuracy of fluid conveying feedback control, and improve the scalability of fluid conveying automation.

[0048] In addition, multiple power channels 11 can be provided inside the pump body 10 to set multiple power rods 64. At the same time, multiple plunger cavities 42 corresponding to the positions of the power channels 11 can be provided inside the pump head body 40 to set multiple variable displacement plunger rods 61. Multiple trajectory channels 12 are set simultaneously to connect multiple plunger rod segments, so that multiple plunger assemblies can be simultaneously connected and interchanged on the same pump head and pump body as a whole, thereby realizing the control of more plunger delivery conditions in the pump head interchangeable use structure.

[0049] See attached document Figure 1 Appendix Figure 7 Appendix Figure 12 and appendix Figure 13 As shown, the plunger rod assembly 60 consists of a capacitive plunger rod 61 and a power rod 64. The right end of the plunger cavity 42 is slidably connected to the capacitive plunger rod 61 through a sealing assembly. A self-priming spring 62 is provided between the right end of the capacitive plunger rod 61 and the pump head 40. The self-priming spring 62 drives the capacitive plunger rod 61 to slide to the right to expand the working cavity volume. The power assembly 65 is powered to the power rod 64. The power rod 64 connects to the capacitive plunger rod 61 to transmit the axial sliding power to reduce the working cavity volume. The capacitive plunger rod 61 and the power rod 64 transmit axial movement through surface contact. The plunger cavity 42 is slidably connected to the capacitive plunger rod 61 through sealing assemblies such as the plunger sealing ring 63.

[0050] By setting a self-priming spring 62 to drive the variable displacement plunger rod 61 to expand the working chamber volume of the pump body and reduce the pressure, and by driving the power rod 64 through the power component 65 to push the variable displacement plunger rod 61 to compress the working chamber volume of the pump body and increase the pressure, the pumping process of the fluid is completed. Under the reset drive of the self-priming spring 62, the suction negative pressure of the fluid pumping can be formed slowly, which can reduce the rate of occurrence of negative pressure in the variable displacement chamber, reduce the risk of sudden change in the critical state of the transmitted fluid, improve the repeatability of fluid transmission conditions, and improve the stability of pump head interchangeability.

[0051] See attached document Figure 1 To be continued Figure 3 Appendix Figure 7 To be continued Figure 10 and appendix Figure 13As shown, a plug-in channel 12 is provided in the left end face of the pump body 10. The plug-in channel 12 is located on the contact connection surface of the pump body 10 that mates with the pump head 40. The lower end of the plug-in channel 12 is connected to the left end of the power channel 11. The plug-in channel 12 provides a range of movement for the movement of the right end of the variable displacement plunger rod 61 to the left end of the power rod 64.

[0052] By setting up a variable-capacity plunger rod 61, a self-priming spring 62, a plug-in channel 12, and a power rod 64, the disassembly and assembly docking space provided by the plug-in channel 12 and the power channel 11 can reduce the operational difficulty of pump head interchangeability, reduce damage to the plunger rod during quick-disassembly and interchangeability, reduce changes in the fitting accuracy of the pump head during interchangeability, improve the stability of pump head interchangeability, and improve the repeatability of fluid transmission conditions during pump head interchangeability.

[0053] See attached document Figure 1 Appendix Figure 3 and appendix Figure 5 To be continued Figure 11 As shown, the right end face of the pump head 40 is fixedly connected to the alignment slider 44, and the left end face of the pump body 10 is provided with an alignment groove 13. The alignment groove 13 is located on the contact connection surface of the pump body 10 that mates with the pump head 40, and the alignment slider 44 is slidably connected to the alignment groove 13 in the radial direction of the power channel 11.

[0054] The alignment groove 13 guides the pump head 40 and the plunger cavity 42 as a whole through the alignment slider 44, thereby driving the variable displacement plunger rod 61 to move and dock with the left side of the power rod 64 within the insertion channel 12. The insertion channel 12 provides a spatial range to accommodate the movement trajectory of the variable displacement plunger rod 61 docking with the power rod 64. The alignment groove 13 restricts the degree of freedom of the alignment slider 44 in the axial direction of the power channel 11.

[0055] See attached document Figure 1 Appendix Figure 7 Appendix Figure 10 and appendix Figure 13 As shown, the alignment groove 13 guides the alignment slider 44 to move radially in the power channel 11, thereby driving the pump head 40 and the capacitive plunger rod 61 to move radially as a whole. The capacitive plunger rod 61 moves downward in the insertion channel 12 and enters the power channel 11. When the alignment slider 44 slides down in the alignment groove 13 to the maximum guiding distance of the alignment groove 13, the capacitive plunger rod 61 reaches the position of the longest movement trajectory in the insertion channel 12 along the radial direction of the power channel 11. At this time, the capacitive plunger rod 61 stops within the radial distance range of the connection between the power rod 64 and the power channel 11. A gap is left between the cylindrical surface of the side wall of the power channel 11 and the outer surface of the capacitive plunger rod 61 and the self-priming spring 62 as a whole.

[0056] By setting up the live ring rod 18, clamping part 19, power channel 11, live ring through groove 43 and alignment slider 44, the alignment groove 13 guides the alignment slider 44 to drive the pump head 40 to slide and connect in the radial direction in a fixed trajectory for interchangeable use. This can improve the stability and reliability of the segmented plunger rod drive connection. At the same time, it increases the range of matching of the segmented plunger rod drive connection and increases the types of plunger rod interchangeable connections, thereby reducing the limitation of plunger rod interchangeable specifications.

[0057] In addition, a gap is left between the side wall of the power channel 11 and the capacitive plunger rod 61, which can reduce the probability of the plunger rod being damaged by the deflection of the pump head 40 relative to the pump body 10 and radial sliding. At the same time, the segmented docking of the capacitive plunger rod 61 and the power rod 64 allows the axially transmitted plunger rod power to be rigidly transmitted to the capacitive cavity along the capacitive plunger rod 61, thereby reducing the wear and damage to the plunger rod pair during the quick-release process, improving the repeatability of the relative motion of the plunger pair, and improving the service life of the plunger and the repeatability of fluid transmission conditions.

[0058] See attached document Figures 1 to 5 and appendix Figure 8 As shown, a live ring groove 43 is provided on the side of the pump head 40. The live ring groove 43 provides a space for the live ring rod 18. The upper and lower side walls of the live ring groove 43 in the radial direction of the power channel 11 restrict the relative movement of the live ring rod 18 in the radial direction of the power channel 11, thereby limiting the maximum distance of the pump head 40 and the variable displacement plunger rod 61 to slide in the radial direction, so that the variable displacement plunger rod 61 remains connected to the power rod 64 in the radial direction of the power channel 11.

[0059] Furthermore, after the ring rod 18 rotates on the pump body 10 to adjust the hinged stopping position, when the clamping member 19 provides clamping thrust to the pump head 40, the ring rod 18 stops in the ring groove 43; the ring groove 43 provides the stopping space for the ring rod 18 to transmit the clamping thrust, so that the clamping member 19 provides clamping thrust contact to the pump head 40 at both ends radially toward the ring rod 18 at the same time, and the ring groove 43 is used to increase the clamping contact area between the clamping member 19 and the pump head 40;

[0060] By setting the live ring groove 43 to restrict the sliding of the pump head 40 relative to the live ring rod 18, the radial docking distance between the power rod 64 and the variable displacement plunger rod 61 can be kept within the radial sliding restriction range of the pump head 40 by the live ring groove 43 through the live ring rod 18 under the radial limit of the live ring groove 43. This improves the reliability of the segmented plunger rod docking and power transmission, reduces the probability of damage to the plunger due to docking errors during interchange, and reduces the risk of power transmission disconnection when the pump head is interchanged.

[0061] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. A radially guided, ring-type detachable pump head, comprising a pump body (10) and a pump head (40), wherein the pump head (40) has a working chamber, a plunger rod assembly (60) is provided in the working chamber, the pump body (10) has a power channel (11) and a power assembly (65), the power channel (11) accommodates the axial reciprocating motion of the plunger rod assembly (60), and the power assembly (65) is power-connected to the plunger rod assembly (60), characterized in that, The pump body (10) and the pump head (40) are connected by surface contact. The pump body (10) is provided with a movable ring rod (18). The other end of the movable ring rod (18) is rotatably connected to a clamping member (19). The clamping member (19) stabilizes the position of the pump head (40).

2. The radially guided, detachable ring-type pump head as described in claim 1, characterized in that, The piston ring rod (18) is hinged to the pump body (10), and the other end of the piston ring rod (18) is threaded to the clamping member (19).

3. The radially guided, detachable ring-type pump head as described in claim 2, characterized in that, The clamping component (19) is a wing nut.

4. A radially guided, detachable ring-type pump head as described in any one of claims 1 to 3, characterized in that, The plunger rod assembly (60) consists of a capacitive plunger rod (61) and a power rod (64). The working chamber is slidably connected to the capacitive plunger rod (61) at one end facing the surface contact connection. A self-priming spring (62) is provided between the other end of the capacitive plunger rod (61) and the pump head (40). The power assembly (65) is poweredly connected to the power rod (64).

5. A radially guided, detachable ring-type pump head as described in claim 4, characterized in that, The pump body (10) is provided with a plug-in channel (12), which is connected to the power channel (11). The plug-in channel (12) provides space for the variable displacement plunger rod (61) to connect with the power rod (64).

6. A radially guided, detachable ring-type pump head as described in claim 5, characterized in that, The pump head (40) is provided with an alignment slider (44), and the pump body (10) is provided with an alignment groove (13). The alignment slider (44) is slidably connected in the alignment groove (13), and the alignment groove (13) guides the movement of the capacitive plunger rod (61) in the insertion channel (12).

7. A radially guided, detachable ring-type pump head as described in claim 6, characterized in that, The movement trajectory of the capacitive plunger rod (61) within the insertion channel (12) is in the radial direction of the power channel (11).

8. A radially guided, detachable ring-type pump head as described in claim 6, characterized in that, The alignment groove (13) restricts the alignment slider (44)'s degree of freedom in the axial direction of the power channel (11).

9. A radially guided, detachable ring-type pump head as described in claim 7, characterized in that, The pump head (40) is provided with a live ring groove (43), which provides a space for the live ring rod (18) and restricts the capacitive plunger rod (61) from being docked with the power rod (64) in the radial direction of the power channel (11).

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