A detachable live ring pump head with slot-type segmented plunger rod

Abstract

The present invention discloses a detachable live-ring pump head with a slot-type segmented plunger rod, and relates to the technical field of plunger pumps, and is used to overcome the problems of low energy efficiency utilization rate of plunger pumps, poor repeatability of fluid delivery conditions, and destruction of fluid delivery state by interchangeable plunger friction pairs. The present invention mainly reduces the design redundancy of pump body strength and power, and reduces the energy consumption of fluid delivery by providing a pump body, a pump head body, a working section plunger rod, and a power section plunger rod; reduces the risk of fluid producing critical state mutations, improves the identity of the shape of the conveyed fluid remaining in the pump head, and improves the stability of the oil film characteristics of the plunger friction pair. By providing guide grooves, guide sliders, pump bodies, and pump head bodies, the accuracy of positioning and movement of the segmented plunger rod interchange and docking process is improved, and the convenience of interchangeable operation of the segmented plunger rod and the detachable pump head is improved.

Description

Technical Field

[0001] The invention relates to the technical field of plunger pumps, and in particular to a detachable live ring pump head of a slot-type segmented plunger rod. Background Art

[0002] The plunger pump is a conventional liquid variable displacement mechanical pump. The plunger rod moves to drive the change of the liquid volume in the plunger cavity, causing the change of the internal and external pressure difference, and absorbs and discharges the liquid to achieve the purpose of transmitting the fluid. In conventional plunger pumps, the plunger rod is fixedly connected to the plunger and cannot be removed as a whole with the pump head. For industries such as health and medicine with high disinfection requirements, thorough disinfection is required when the equipment is shut down or the conveying material is changed. The plunger rod cannot be removed with the pump head, making disinfection difficult.

[0003] The pump body centrally and fixedly installs the plunger rod and sealing components inside the pump body, and the power part drives the plunger rod to reciprocate, thereby absorbing and discharging the transmitted fluid in the integrated fixed pump head structure. In the existing conventional plunger pump structure, when the physical and chemical properties of the fluid transmitted by the plunger pump change with the change of transmission conditions, the integrated plunger pump usually relies on manual removal of the pump head structure fixed to the pump body to maintain the internal mechanisms such as the plunger reciprocating motion mechanism, the volume-variable cavity parts, the sealing components and the distribution structure; in addition, during the exchange process of the plunger and the pump head body, such as disassembly, maintenance, etc., the influence of the change in the accuracy of the plunger friction pair on the flow state of the conveyed fluid is difficult to effectively control, resulting in poor reproducibility of the fluid delivery conditions, which is not conducive to high-precision fluid delivery.

[0004] In the prior art, for example, the U.S. invention patent US8317493B2 discloses a high-precision metering delivery pump, which reduces the contamination retention at the contact position of the plunger during fluid delivery by adjusting the distribution system, switching multiple flow channels, and controlling the speed, and adjusts the flow characteristics to meet the delivery accuracy requirements by controlling the flow rate; in this invention patent, the matching area of ​​the plunger friction pair can be adjusted by a split plunger combination structure, and the plunger structure is adjustably assembled in one by a threaded connection; in this invention patent, when the working area of ​​the plunger pair is adjusted, the cylindrical surface of the plunger pair oil film may be damaged by a non-axial torque, and the adjustment of the flow characteristics of the delivered fluid may not be complete. In addition, in this technical solution, there may be a situation where the residual delivered fluid cannot be completely removed, and it is difficult to adapt to the high-precision fluid delivery requirements. Summary of the invention

[0005] The purpose of the present invention is to provide a detachable movable ring pump head with a slot-type segmented plunger rod, so as to overcome the shortcomings of the prior art such as low energy efficiency utilization rate of plunger pumps, poor repeatability of fluid delivery conditions, and destruction of fluid delivery conditions due to interchangeable plunger friction pairs.

[0006] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0007] A detachable live-ring pump head with a slot-type segmented plunger rod comprises a pump body and a pump head body, a working chamber is provided in the pump head body, a plunger mechanism is provided in the working chamber, a power channel and a power assembly are provided in the pump body, the power channel accommodates the axial reciprocating motion of the plunger mechanism, the pump body and the pump head body are connected by surface contact, a working chamber is provided in the pump head body, the plunger mechanism comprises a working section plunger rod and a power section plunger rod, the working section plunger rod is slidably connected in the working chamber, a plug-in boss is fixedly connected at the other end of the working section plunger rod, the power section plunger rod is located in the power channel, a plug-in groove is provided at one end of the power section plunger rod facing the working section plunger rod, the guide of the plug-in groove to the plug-in boss is radially consistent with the power section plunger rod, the end of the plug-in boss is plug-fitted with the axial side wall of the plug-in groove, a track channel is provided on the contact connection surface of the pump body, and the track channel and the power channel are connected to each other.

[0008] Preferably, an inserting neck groove is provided between the side wall of the inserting groove and the end surface of the power section plunger rod facing the working section plunger rod.

[0009] Preferably, the plug neck groove and the plug groove cover the diameter length of the power section plunger rod;

[0010] By arranging the pump body, pump head body, working section plunger rod and power section plunger rod, the delivery specifications, power distribution and adaptation effects of fluid delivery switching are improved, the adaptability of the fluid delivery system to changes in fluid parameters is improved, the design redundancy of pump body strength and power is reduced, and the energy consumption of fluid delivery is reduced; the risk of fluid producing critical state mutation is reduced, the identity of the shape of the conveyed fluid remaining in the pump head is improved, the need for cleaning and disinfection of the pump head of the fluid delivery system is reduced, the fluctuation amplitude of the flow state of the fluid delivered when changing specifications is reduced, and the stability of the oil film characteristics of the plunger friction pair is improved.

[0011] Preferably, a fastening mechanism is provided on the pump body, and the fastening mechanism comprises a movable ring rod arranged on the pump body, and a clamping assembly is provided at the other end of the movable ring rod.

[0012] Preferably, the movable ring rod is hinged on the pump body, the clamping assembly includes a clamping piece, and the other end of the movable ring rod is threadedly connected to the clamping piece.

[0013] Preferably, a guide slider is provided on the pump head body, and a guide groove is provided on the pump body, in which the guide slider is slidably connected, and the guide groove guides the movement trajectory of the pump head body relative to the pump body;

[0014] By providing the guide groove, the guide slider, the pump body and the pump head body, the moving stability and accuracy of the plug-in positioning of the working section plunger rod and the power section plunger rod are improved, the positioning and movement accuracy of the segmented plunger rod interchangeable docking process is improved, and the matching accuracy of the interchangeable disassembly and assembly of the detachable pump head is improved; the simplicity of the interchangeable operation of the segmented plunger rod and the detachable pump head is improved.

[0015] Preferably, the guiding direction of the guide groove is in the radial direction of the power channel.

[0016] Preferably, a movable ring groove is provided on the pump head body, the movable ring rod limits the radial movement range of the pump head body relative to the pump body, and the guide groove and the movable ring rod are used for docking and positioning between the working section plunger rod and the power section plunger rod;

[0017] By providing a movable ring rod, a clamping piece, a guide groove, a movable ring groove and a guide slide block, the docking stability of the segmented plunger rod is improved, the risk of internal misalignment and power transmission disconnection of interchangeable pump heads is reduced, and the ease of operation of interchangeable pump heads is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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 in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0019] Figure 1 It is a schematic diagram of the assembly relationship between the pump body and the pump head body;

[0020] Figure 2 yes Figure 1 A schematic diagram of the main view;

[0021] Figure 3 yes Figure 1 Schematic diagram of top view;

[0022] Figure 4 yes Figure 2 A local enlarged schematic diagram of the middle A;

[0023] Figure 5 It is a schematic diagram of the structure of the pump head body;

[0024] Figure 6 yes Figure 5 A side view schematic diagram of

[0025] Figure 7 It is a schematic diagram of the connection relationship between the plunger cavity and the plunger mechanism;

[0026] Figure 8 It is a schematic diagram of the structure of the pump body;

[0027] Fig. 9 yes Figure 8 Schematic diagram of top view;

[0028] Fig.10 yes Figure 8 Schematic cross-sectional view at CC in the middle;

[0029] Fig.11 It is a schematic diagram of the three-dimensional structure of the pump body;

[0030] Fig.12 It is a schematic diagram of the assembly relationship between the working section plunger rod and the power section plunger rod;

[0031] Fig.13 It is a schematic diagram of the connection between the working section plunger rod and the power section plunger rod;

[0032] Fig.14 yes Fig.13 A local enlarged schematic diagram of the S in the middle;

[0033] Fig.15 It is a structural schematic diagram of the plug-in boss;

[0034] Fig.16 It is a schematic diagram of the structure of the plunger rod of the power section;

[0035] Fig.17 It is a schematic diagram of the positional relationship between the plug slot and the plug neck slot.

[0036] Figure numbers: pump body 10; power channel 11; trajectory channel 12; guide groove 13; hinge groove 14; leak detection hole 15; hinge column hole 16; hinge column 17; movable ring rod 18; pressing piece 19; pump head body 40; variable volume cavity 41; plunger cavity 42; movable ring groove 43; guide slider 44; distribution hole 45; plunger mechanism 60; working section plunger rod 61; power section plunger rod 62; plug-in boss 63; plug-in groove 64; plug-in neck groove 65; sealing member 68. DETAILED DESCRIPTION

[0037] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described with reference to the accompanying drawings.

[0038] The specific embodiments of the present invention described herein are only used to explain the purpose of the present invention and cannot be understood as limiting the present invention in any way. Under the guidance of the present invention, technicians can conceive of any possible variations based on the present invention, which should be regarded as belonging to the scope of the present invention. It should be noted that when an element is referred to as "arranged on" another element, it can be directly on another element or there can also be a central element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there may be a central element at the same time. The terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation method.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0040] Embodiment 1

[0041] See attached Figure 1 To Attachment Fig.17 As shown, the present invention provides a detachable live ring pump head with a slot-type segmented plunger rod, comprising a pump body 10 and a pump head body 40, wherein a working chamber is provided in the pump head body 40, a plunger mechanism 60 is provided in the working chamber, a power channel 11 and a power assembly are provided in the pump body 10, the power channel 11 accommodates the axial reciprocating motion of the plunger mechanism 60, and the power assembly is connected to the plunger mechanism 60 in a power manner;

[0042] The pump body 10 and the pump head body 40 are fixed in a detachable matching manner by surface contact connection. A working chamber is provided in the pump head body 40. The plunger mechanism 60 is composed of a working section plunger rod 61 and a power section plunger rod 62. The working section plunger rod 61 is slidably connected in the working chamber. The other end of the working section plunger rod 61 is fixedly connected with a plug-in boss 63. The power section plunger rod 62 is located in the power channel 11. The power assembly is connected to the power section plunger rod 62. The power section plunger rod 62 faces the working section plunger rod 61. One end of the pump body 10 is provided with a plug-in groove 64, and the plug-in groove 64 guides the plug-in boss 63 in a radially consistent manner with the power section plunger rod 62. The plug-in boss 63 is plugged into the plug-in groove 64, and the power section plunger rod 62 drives the working section plunger rod 61 to move axially synchronously through the plug-in boss 63. A track channel 12 is provided on the contact connection surface of the pump body 10, and the track channel 12 provides an operating space for the working section plunger rod 61 to dock with the power section plunger rod 62. The track channel 12 and the power channel 11 are connected to each other;

[0043] A plug-in slot 64 is provided at the left end of the power section plunger rod 62, and the plug-in slot 64 has an opening in the radial direction of the power section plunger rod 62. The right end of the plug-in boss 63 is plugged into the plug-in slot 64, and the right end of the plug-in boss 63 can slide in the plug-in slot 64 along the radial direction of the power section plunger rod 62. The two axial side walls of the plug-in slot 64 cooperate with the right end of the plug-in boss 63, and the end of the plug-in boss 63 can rotate relatively in the circumferential direction of the plug-in slot 64. A plug-in neck slot 65 is provided between the left end wall of the plug-in slot 64 and the left end face of the power section plunger rod 62, and the plug-in neck slot 65 is provided in the power section. The axial opening direction of the power section plunger rod 62 is consistent with the plug-in groove 64, and the left end neck of the plug-in boss 63 can be relatively rotated in the circumferential direction of the plug-in neck groove 65. The plug-in neck groove 65 is used to limit the fitting depth of the end of the plug-in boss 63 in the plug-in groove 64. The power section plunger rod 62 drives the left and right side surfaces of the end of the plug-in boss 63 to move axially synchronously through the left and right end walls of the plug-in groove 64, thereby driving the working section plunger rod 61 to move axially synchronously. The radial depth of the plug-in groove 64 and the plug-in neck groove 65 on the power section plunger rod 62 can be the length of the diameter of the left end of the power section plunger rod 62;

[0044] A variable volume chamber 41 is provided in the pump head body 40, and fluid input and output channels are provided in the side walls of the variable volume chamber 41. The fluid input and output channels flow in and out of the conveyed fluid through the pipelines provided on the distribution hole 45. A plunger chamber 42 is provided at the right end of the variable volume chamber 41. The plunger chamber 42 is communicated with the variable volume chamber 41, and the right end of the plunger chamber 42 is slidably connected to the working section plunger rod 61; a power assembly is provided in the pump body 10, and the power assembly drives the plunger mechanism 60 to slide left and right in the plunger chamber 42, thereby driving the pressure in the variable volume chamber 41 to increase and decrease to complete the suction and discharge actions of the conveyed fluid;

[0045] By setting the surface contact matching connection between the pump body 10 and the pump head body 40, and driving the plug-in boss 63 plugged therein to move synchronously axially through the plug-in slot 64 provided in the power section plunger rod 62, the reciprocating motion transmitted by the power assembly is transmitted to the working section plunger rod 61 through the plug-in boss 63, and the pump body pressure changes to transport the fluid; the working section plunger rod 61 is slidably connected in the plunger cavity 42 through the sealing member 68;

[0046] The pump body 10 and the pump head 40 can be detachably assembled and disassembled into a plunger pump as a whole and pump head bodies 40 of different specifications can be switched to be used with the pump body 10. Pump heads of different delivery specifications can be switched on the same pump body power assembly, so that different fluid delivery conditions and delivery specifications can be switched. The same pump body power assembly is used to provide reciprocating power for switching different pump heads, which can reduce the material cost of switching the specifications of the fluid delivery pump head. At the same time, the pump body and the power assembly as a whole are used as basic components, and the pump head is used as an interchangeable part for disassembly and assembly;

[0047] By providing the pump body 10, the pump head body 40, the working section plunger rod 61 and the power section plunger rod 62, the delivery specifications, power distribution and adaptation effects of the fluid delivery switching are improved, the risks of overload and damage of the fluid delivery system pipeline and insufficient power are reduced, the adaptability of the fluid delivery system to changes in fluid parameters is improved, the flexibility of the power and delivery specification distribution combination of the fluid delivery system is improved, the safety and delivery efficiency of the fluid delivery system are improved, the utilization rate of the pump body and power components is improved, the design redundancy of the pump body strength and power is reduced, and the energy consumption of fluid delivery is reduced; the layout and control accuracy of the variable specification delivery fluid system are improved, the process performance of the pump body disassembly and interchangeable parts and the convenience of material management are improved; the modification cost of the pump head interchangeable parts to the existing delivery system is reduced, and the assembly accuracy of the pump head interchangeable parts during the disassembly and interchange process is reduced. The effect of the pump head interchangeable parts on the fluid delivery process is improved, and the ability to reproduce the fluid delivery specifications of the pump head interchangeable parts is stabilized, and the flow state of the delivered fluid is reduced by the influence of the delivery specification changes. A variety of fluids can be switched on the same pump body and power assembly for delivery. The same or similar fluids can be switched on the pump head interchangeable parts with the allowed delivery specifications on the pump body and power assembly with the same delivery power, which reduces the influence of the delivery specification switching on the flow state of the delivered fluid, stabilizes the stability of the delivered fluid's own state, reduces the risk of sudden changes in the critical state of the fluid, improves the convenience of regulating the delivery specifications and flow characteristics of the fluid delivery system, improves the identity of the shape of the delivered fluid remaining in the pump head, reduces the need for cleaning and disinfection of the pump head of the fluid delivery system, reduces the possibility of leakage of the delivered fluid in the delivery system, and improves the convenience of regulating the delivery of special fluids.

[0048] Improve the reproducibility of the delivery accuracy of the interchangeable pump head parts, improve the control accuracy of the interchangeable delivery specifications of the switching layout fluid delivery, reduce the fluctuation amplitude of the flow state of the specification-changing delivery fluid, reduce the probability of solid phase precipitation due to critical changes in the multi-phase mixed delivery fluid, reduce the risk of delivery blockage, reduce the change of the gas-dissolved state of the multi-phase mixed delivery fluid, improve the stability of the plunger auxiliary oil film characteristics of the interchangeable pump head parts, and reduce the risk of sudden changes in the volumetric efficiency of the interchangeable pump head, thereby improving the service life and delivery safety of the delivery system;

[0049] In addition, by providing the plug-in boss 63, the plug-in groove 64, the power section plunger rod 62 and the working section plunger rod 61, the circumferential rotational freedom of the working section plunger rod 61 can be released in the process of the power assembly driving the power section plunger rod 62 to move, which can effectively reduce the possibility of the power assembly transmitting the circular motion to the working section plunger rod 61, reduce the probability of the plunger pair being subjected to circumferential wear, further increase the service life of the plunger friction pair, and improve the stability of the oil film characteristics of the plunger friction pair;

[0050] In addition, a plurality of power channels 11 can be provided in the pump body 10 to set a plurality of power-segment plunger rods 62. At the same time, a plurality of plunger cavities 42 corresponding to the positions of the power channels 11 can be provided in the pump head body 40 to set a plurality of working-segment plunger rods 61. A plurality of trajectory channels 12 are synchronously provided to dock a plurality of plunger rod segments, so that a plurality of plunger assemblies can be synchronously docked and interchanged on the same pump head and pump body as a whole, thereby realizing the regulation and formation of more plunger delivery conditions in the pump head interchangeable structure.

[0051] See attached Figure 7 and attached Fig.10 As shown, a guide slider 44 is fixedly connected to the right end surface of the pump head body 40, and a guide groove 13 is provided on the left end surface of the pump body 10. The guide groove 13 cooperates with the guide slider 44, and the guide groove 13 guides the movement trajectory of the disassembly and assembly working section plunger rod 61 in the trajectory channel 12; when the plunger mechanism 60 is docked and installed between the pump body 10 and the pump head body 40, the pump body 10 slides in the radial direction of the plunger mechanism 60 through the guide groove 13 to guide the guide slider 44 and the pump head body 40 to slide toward the power channel 11, and guides the guide slider 44 to slide downward in the guide groove 13 through the guide groove 13, thereby driving the pump head body 40 and the plunger mechanism 60 to park as a whole against the power section plunger rod 62 in the power channel 11, and then the docking of the working section plunger rod 61 and the power section plunger rod 62 is completed after the plug-in boss 63 is plugged into the plug-in groove 64;

[0052] By providing the guide groove 13, the guide slider 44, the pump body 10 and the pump head body 40, the sliding state of the guide slider 44 can be stabilized under the guiding action of the guide groove 13, the movement stability and accuracy of the plug-in positioning of the working section plunger rod 61 and the power section plunger rod 62 can be improved, the disassembly and docking speed can be improved, and at the same time, the disassembly and assembly collision and wear can be reduced, the surface damage of the contact mating surface between the pump body 10 and the pump head body 40 can be reduced, the positioning and movement accuracy of the segmented plunger rod in the interchangeable docking process can be improved, and the matching accuracy of the interchangeable disassembly and assembly of the detachable pump head can be improved; the convenience of the interchangeable operation of the segmented plunger rod and the detachable pump head can be improved, and the interchangeable service life and safety of the detachable pump head can be improved.

[0053] The left end face of the pump body 10 is provided with a track channel 12. When the plug-in boss 63 follows the pump head body 40 to dock in the plug-in groove 64 in the radial direction of the power channel 11, the track channel 12 accommodates the docking movement track of the working section plunger rod 61 at the left end of the pump body 10; the track channel 12 is connected with the power channel 11, and the track channel 12 provides a disassembly and assembly operation space for the working section plunger rod 61 to dock with the power section plunger rod 62; when the guide slider 44 slides downward relative to the pump body 10 in the guide groove 13 to the maximum guide sliding position of the guide groove 13, the working section plunger rod 61 and the power section plunger rod 62 complete docking;

[0054] See attached Figures 1 to 4 , Attachment Figure 6 , Attachment Figure 7 And attached Fig.10 As shown, a hinge groove 14 is provided on the side of the pump body 10, and a hinge column 17 is rotatably connected between the two side walls of the hinge groove 14. A hinge column hole 16 is provided on the pump body 10, and the hinge column 17 is arranged in the hinge groove 14 through the hinge column hole 16. One end of the hinge column 17 located in the hinge groove 14 is rotatably connected to a live ring rod 18, and the other end of the live ring rod 18 is rotatably connected to a pressing piece 19 through a threaded rotation. The pump head body 40 is located between the pressing piece 19 and the pump body 10, and the live ring rod 18 is hinged to the pump body 10 through the hinge column 17;

[0055] The fastening mechanism includes a movable ring rod 18 disposed on the pump body 10, and a clamping assembly is provided at the other end of the movable ring rod 18, and the clamping assembly fixes the relative position of the pump body 10 and the pump head body 40; the clamping assembly includes a clamping piece 19 threadedly connected to the other end of the movable ring rod 18, and the clamping piece 19 clamps and fixes the surface contact connection; the clamping assembly fixes the relative position of the pump body 10 and the pump head body 40;

[0056] See attached Figure 1 To Attachment Figure 4 , Attachment Fig.10 To Attachment Fig.14As shown, a live ring groove 43 is provided on the pump head body 40, and the live ring groove 43 provides a space for accommodating the live ring rod 18. The live ring rod 18 limits the radial movement range of the pump head body 40 relative to the pump body 10. The guide groove 13 and the live ring rod 18 are used for docking and positioning between the working section plunger rod 61 and the plug-in groove 64. By adjusting the relative position of the pump head body 40 and the pump body 10, after the plug-in matching of the working section plunger rod 61 and the power section plunger rod 62 is completed, under the pressing action of the pressing member 19, the plug-in state between the power section plunger rod 62 and the working section plunger rod 61 is fixed;

[0057] The free rotation plane of the movable ring rod 18 hinged on the pump body 10 is perpendicular to the left end face of the pump body 10 and the right end face of the pump head body 40. After the movable ring rod 18 is hinged and rotated around the hinge column 17 toward the pump head body 40, the movable ring rod 18 is accommodated in the movable ring groove 43. The length of the movable ring rod 18 in the axial direction of the plunger mechanism 60 is greater than the movable ring groove 43; the pressing piece 19 threadedly connected to the left end of the movable ring rod 18 moves to the right after forward rotation, thereby providing a rightward extrusion force on the pump head body 40, thereby increasing the left end face of the pump body 10 and the right end face of the pump head body 40. The friction between them and the extrusion force provided by the clamping piece 19 maintains a stable fit between the right end face of the pump head body 40 and the left end face of the pump body 10; when the clamping piece 19 is reversed on the movable ring rod 18, the clamping piece 19 moves on the movable ring rod 18 in a direction relatively away from the hinge column 17, thereby releasing the extrusion force on the pump head body 40, and after the movable ring rod 18 is rotated on the hinge column 17 in the opposite direction away from the pump head body 40, the movable ring rod 18 is disengaged from the accommodation of the movable ring groove 43, thereby releasing the freedom of the pump head body 40 to slide on the left end face of the pump body 10.

[0058] By setting the movable ring rod 18, the clamping piece 19, the guide groove 13, the movable ring groove 43 and the guide slider 44, the pump head body 40 slides in the guide groove 13 through the guide slider 44 to adjust the position on the contact matching surface relative to the pump body 10, the pump head body 40 drives the working section plunger rod 61 to move in the track channel 12 into the power channel 11 to plug and connect with the plug boss 63, the clamping piece 19 clamps the surface contact connection between the pump head body 40 and the pump body 10, and the clamping piece 19 relatively increases the contact area between the pump head body 40, which can be pressed by the clamping piece 19. When the working section plunger rod 61 and the power section plunger rod 62 are fixed in the centering state, the stability of the plug-in state of the working section plunger rod 61 and the power section plunger rod 62 is improved, the wear of the plunger rod segmented interchangeable disassembly and assembly is reduced, the centering state maintenance accuracy and docking state maintenance effect are improved, the docking stability of the segmented plunger rod is improved, the risk of internal misalignment and power transmission disconnection of the interchangeable pump head is reduced, the disassembly and assembly speed and stability of the pump head interchangeable parts are improved, and the ease of operation of the pump head interchangeable use is improved; at the same time, the accuracy of the docking positioning of the segmented plunger rod and the convenience of operation are improved;

[0059] At the same time, the internal power docking condition can be judged according to the relative state between the movable ring rod 18, the clamping piece 19 and the pump head body 40, and the leakage condition of the volume-variable cavity can be checked by connecting the leak detection hole 15 provided on the pump head body 40. The working state of the interchangeable pump head can be grasped in time without disassembly, thereby improving the convenience of status monitoring of the interchangeable pump head.

[0060] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes made by a person skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A detachable live ring pump head with a slot-type segmented plunger rod, comprising a pump body (10) and a pump head body (40), wherein a working chamber is provided in the pump head body (40), a plunger mechanism (60) is provided in the working chamber, a power channel (11) and a power assembly are provided in the pump body (10), wherein the power channel (11) accommodates the axial reciprocating motion of the plunger mechanism (60), and wherein: The pump body (10) and the pump head body (40) are connected by surface contact, the pump head body (40) is provided with a working chamber, the plunger mechanism (60) comprises a working section plunger rod (61) and a power section plunger rod (62), the working section plunger rod (61) is slidably connected in the working chamber, the other end of the working section plunger rod (61) is fixedly connected with a plug-in boss (63), the end of the power section plunger rod (62) facing the working section plunger rod (61) is provided with a plug-in groove (64), the end of the plug-in boss (63) is plug-fitted with the axial side wall of the plug-in groove (64), the plug-in groove (64) guides the plug-in boss (63) in a radially consistent manner with the power section plunger rod (62), and a track channel (12) is provided on the contact connection surface of the pump body (10), the track channel (12) and the power channel (11) are communicated with each other; An inserting neck groove (65) is provided between the side wall of the inserting groove (64) and the end surface of the power section plunger rod (62) facing the working section plunger rod (61); The end of the plug-in boss (63) can rotate relatively in the circumferential direction of the plug-in groove (64); The pump body (10) is provided with a fastening mechanism, the fastening mechanism comprising a movable ring rod (18) arranged on the pump body (10), and the other end of the movable ring rod (18) is provided with a clamping assembly; The pump head body (40) is provided with a guide slider (44), and the pump body (10) is provided with a guide groove (13), the guide slider (44) being slidably connected in the guide groove (13), and the guide groove (13) guides the movement trajectory of the pump head body (40) relative to the pump body (10); The guiding direction of the guide groove (13) is in the radial direction of the power channel (11).

2. A detachable live ring pump head with a slot-type segmented plunger rod as claimed in claim 1, characterized in that: The left end neck of the plug boss (63) can rotate relatively in the circumferential direction within the plug neck groove (65). The plug neck groove (65) is used to limit the fitting depth of the end of the plug boss (63) in the plug groove (64). The power section plunger rod (62) drives the left and right side surfaces of the end of the plug boss (63) to move axially synchronously through the left and right end walls of the plug groove (64), thereby driving the working section plunger rod (61) to move axially synchronously.

3. A detachable live ring pump head with a slot-type segmented plunger rod as claimed in claim 1, characterized in that: The movable ring rod (18) is hinged on the pump body (10), the clamping assembly comprises a clamping piece (19), and the other end of the movable ring rod (18) is threadedly connected to the clamping piece (19).

4. A detachable live ring pump head with a slot-type segmented plunger rod as claimed in claim 1, characterized in that: The pump head body (40) is provided with a movable ring groove (43), the movable ring rod (18) limits the radial movement range of the pump head body (40) relative to the pump body (10), and the guide groove (13) and the movable ring rod (18) are used for docking and positioning between the working section plunger rod (61) and the power section plunger rod (62).

Images