Detachable movable ring pump head of clamping groove type segmented plunger rod

Abstract

The invention discloses a detachable movable ring pump head of a clamping groove type segmented plunger rod, 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 fluid conveying state is damaged due to the fact that a plunger friction pair is exchanged. The pump body, the pump head body, the working section plunger rod and the power section plunger rod are mainly arranged, so that the strength of the pump body and the design redundancy of power are reduced, and the energy consumption of fluid conveying is reduced; the risk that the fluid generates critical state sudden change is reduced, the identity of the shape of the conveying fluid left on the pump head is improved, and the stability of the oil film characteristic of a plunger friction pair is improved. By arranging the guide groove, the guide sliding block, the pump body and the pump head body, the accuracy of positioning and moving in the interchange butt joint process of the segmented plunger rods is improved, and the simplicity and convenience of interchange operation of the segmented plunger rods and the detachable pump head are improved.

Description

Technical Field

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

[0002] A plunger pump is a conventional variable-displacement mechanical pump that transfers fluids by absorbing and discharging liquids through the movement of the plunger rod, which changes the volume of the liquid in the plunger chamber, causing a pressure differential between the inside and outside of the chamber. In conventional plunger pumps, the plunger rod is fixed to the plunger and cannot be removed with the pump head. This makes it difficult to remove the plunger rod from the pump head, especially in industries like healthcare and medicine, where thorough disinfection is required during equipment shutdown or when changing materials being conveyed.

[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 move back and forth, thereby absorbing and discharging the transmitted fluid within 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 components, the sealing components and the distribution structure; in addition, during the exchange process such as the disassembly and maintenance of the plunger and the pump head body, the influence of the change in the precision of the plunger friction pair on the flow state of the transmitted fluid is difficult to effectively control, resulting in poor reproducibility of the fluid transmission conditions, which is not conducive to high-precision fluid transmission.

[0004] In the prior art, for example, 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 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 into 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 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, making it 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 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: A detachable movable 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 has a working section plunger rod and a power section plunger rod, the working section plunger rod is slidably connected in the working chamber, the other end of the working section plunger rod is fixedly connected with a plug-in boss, the power section plunger rod is located in the power channel, and 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.

[0007] Preferably, a plug-in neck groove is provided between the side wall of the plug-in groove and the end surface of the power section plunger rod facing the working section plunger rod.

[0008] Preferably, the plug neck groove and the plug groove cover the diameter length of the power section plunger rod; 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 the 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 uniformity of the shape of the delivered 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 delivery fluid when changing specifications is reduced, and the stability of the oil film characteristics of the plunger friction pair is improved.

[0009] Preferably, a fastening mechanism is provided on the pump body, and the fastening mechanism includes a movable ring rod provided on the pump body, and a pressing assembly is provided at the other end of the movable ring rod.

[0010] Preferably, the movable ring rod is hinged on the pump body, the pressing assembly includes a pressing piece, and the other end of the movable ring rod is threadedly connected to the pressing piece.

[0011] Preferably, a guide slider is provided on the pump head body, and a guide groove is provided on the pump body, wherein the guide slider is slidably connected in the guide groove, and the guide groove guides the movement trajectory of the pump head body relative to the pump body; By arranging the guide groove, the guide slider, the pump body and the pump head body, the movement 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.

[0012] Preferably, the guiding direction of the guide groove is in the radial direction of the power channel.

[0013] Preferably, a movable ring groove is provided on the pump head body, and the movable ring rod limits the radial movement range of the pump head body relative to the pump body. 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; By providing a movable ring rod, a pressing piece, a guide groove, a movable ring groove and a guide slider, 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, and the ease of operation of interchangeable pump heads is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0015] Figure 1 It is a schematic diagram of the assembly relationship between the pump body and the pump head body; Figure 2 yes Figure 1 The main schematic diagram of Figure 3 yes Figure 1 Schematic top view of Figure 4 yes Figure 2 A partial enlarged schematic diagram of point A in the middle; Figure 5 It is a structural diagram of the pump head body; Figure 6 yes Figure 5 A side view schematic diagram of Figure 7 It is a schematic diagram of the connection relationship between the plunger cavity and the plunger mechanism; Figure 8 It is a schematic diagram of the structure of the pump body; Figure 9 yes Figure 8 Schematic top view of Figure 10 yes Figure 8 Schematic cross-sectional view at CC; Figure 11 It is a schematic diagram of the three-dimensional structure of the pump body; Figure 12 It is a schematic diagram of the assembly relationship between the working section plunger rod and the power section plunger rod; Figure 13 It is a schematic diagram of the connection between the working section plunger rod and the power section plunger rod; Figure 14 yes Figure 13 A local enlarged schematic diagram of the S in the middle; Figure 15 It is a structural diagram of the plug-in boss; Figure 16 It is a structural diagram of the plunger rod of the power section; Figure 17 It is a schematic diagram of the positional relationship between the plug slot and the plug neck slot.

[0016] Figure numerals: 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

[0017] 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.

[0018] The specific embodiments of the present invention described herein are intended only to explain the present invention and are not to be construed as limiting the present invention in any way. Under the guidance of the present invention, a skilled person may conceive of any possible variations based on the present invention, all of which should be considered to fall within the scope of the present invention. It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time. The terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to mechanical or electrical connections, or to the internal communication between two elements, and may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood 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 implementation methods.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are intended only to describe specific embodiments and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] Example 1 Refer to the attached Figure 1 To the attached Figure 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. The pump head body 40 is provided with a working chamber, in which a plunger mechanism 60 is provided. The pump body 10 is provided with a power channel 11 and a power assembly. The power channel 11 accommodates the axial reciprocating motion of the plunger mechanism 60, and the power assembly is dynamically connected to the plunger mechanism 60. The pump body 10 and the pump head body 40 are fixed in a detachable manner by means of a 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 to a plug-in boss 63. The power section plunger rod 62 is located in the power channel 11. The power component 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 the radial direction consistent 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 opened on the contact connection surface of the pump body 10. The track channel 12 provides an operating space for the working section plunger rod 61 to connect with the power section plunger rod 62. The track channel 12 and the power channel 11 are connected to each other. The left end of the power section plunger rod 62 is provided with a plug-in groove 64, and the plug-in groove 64 is provided with 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 groove 64, and the right end of the plug-in boss 63 can slide in the plug-in groove 64 along the radial direction of the power section plunger rod 62. The two axial side walls of the plug-in groove 64 cooperate with the right end of the plug-in boss 63. The end of the plug-in boss 63 can rotate relatively in the circumferential direction of the plug-in groove 64. A plug-in neck groove 65 is provided between the left end wall of the plug-in groove 64 and the left end face of the power section plunger rod 62. The plug-in neck groove 65 is provided in the power section plunger rod 62. The axial opening direction of the power section plunger rod 62 is consistent with the plug-in groove 64. The left end neck of the plug-in boss 63 can rotate relatively in the circumferential direction within 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 that penetrates the diameter of the left end of the power section plunger rod 62. 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 to be transported flows in and out of the fluid input and output channels through pipes 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 and the variable volume chamber 41 are interconnected, 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 increasing and decreasing the pressure in the variable volume chamber 41 to complete the suction and discharge of the transported fluid. By providing a surface contact fit connection between the pump body 10 and the pump head body 40, and by driving the plug-in boss 63 inserted 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 to the plunger cavity 42 through the seal 68; The pump body 10 and the pump head 40 can be detachably assembled and disassembled into a plunger pump as a whole, and pump heads 40 of different specifications can be switched for use with the pump body 10. Pump heads of different delivery specifications can be switched on the same pump body power assembly, thereby switching to different fluid delivery conditions and delivery specifications. The same pump body power assembly is used to provide reciprocating power for switching between different pump heads, which can reduce the material cost of switching fluid delivery pump head specifications. At the same time, the pump body and power assembly as a whole are used as basic components, and the pump head is used as an interchangeable part for disassembly and assembly; By arranging 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 damage and insufficient power of the fluid delivery system pipeline 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 interchangeability 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 impact of the disassembly and interchangeability process on the assembly accuracy of the pump head interchangeable parts is reduced. The effect is to stabilize the ability of the interchangeable parts of the pump head to reproduce the fluid delivery specifications during the fluid delivery process, reduce the influence of the flow state of the delivered fluid on the change of the delivery specifications, and can switch multiple fluids for delivery on the same pump body and power assembly. The same or similar fluids can be switched with the interchangeable parts of the pump head of the same delivery specifications on the pump body and power assembly with the same delivery power, which reduces the influence of the flow state of the delivered fluid on the switching of the delivery specifications, stabilizes the stability of the state of the delivered fluid itself, reduces the risk of the fluid producing a critical state mutation, 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; The reproducibility of the delivery accuracy of the interchangeable pump head parts is improved, the control accuracy of the interchangeable delivery specifications of the fluid delivery in the switching layout is improved, the fluctuation amplitude of the flow state of the fluid delivered in the specification change is reduced, the probability of solid phase precipitation due to critical change of the multi-phase mixed delivery fluid is reduced, the risk of delivery blockage is reduced, the change of the gas-solution state of the multi-phase mixed delivery fluid is reduced, the stability of the oil film characteristics of the plunger of the interchangeable pump head parts is improved, and the risk of sudden change in the volumetric efficiency of the interchangeable pump head is reduced, thereby improving the service life and delivery safety of the delivery system; 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 when the power assembly drives the power section plunger rod 62 to move, which can effectively reduce the possibility of the power assembly transmitting circumferential motion to the working section plunger rod 61, reduce the probability of the plunger pair being subject 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; In addition, multiple power channels 11 can be provided in the pump body 10 to set up multiple power-segment plunger rods 62. At the same time, multiple plunger cavities 42 corresponding to the positions of the power channels 11 can be provided in the pump head body 40 to set up multiple working-segment plunger rods 61. Multiple trajectory channels 12 are synchronously provided to connect multiple plunger rod segments, so that multiple plunger assemblies can be synchronously connected 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 use structure.

[0021] Refer to the attached Figure 7 and attached Figure 10 As shown, the right end surface of the pump head body 40 is fixedly connected to a guide slider 44, and the left end surface of the pump body 10 is provided with a guide groove 13, and the guide groove 13 cooperates with the guide slider 44 to guide 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 the guide slider 44 is guided by the guide groove 13 to slide downward in the guide groove 13, thereby driving the pump head body 40 and the plunger mechanism 60 as a whole to dock 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; By setting 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, thereby improving the movement stability and accuracy of the plug-in positioning of the working section plunger rod 61 and the power section plunger rod 62, and improving the disassembly and docking speed. At the same time, the disassembly collision and wear are reduced, and the surface damage of the contact mating surface between the pump body 10 and the pump head body 40 is reduced, thereby improving the positioning and movement accuracy of the segmented plunger rod interchangeable docking process, and improving the matching accuracy of the interchangeable disassembly and assembly of the detachable pump head; improving the simplicity of the interchangeable operation of the segmented plunger rod and the detachable pump head, and improving the interchangeable service life and safety of the detachable pump head.

[0022] A track channel 12 is provided on the left end face of the pump body 10. When the plug-in boss 63 follows the pump head body 40 and docks in the plug-in groove 64 in the radial direction of the power channel 11, the track channel 12 accommodates the docking motion trajectory of the working section plunger rod 61 at the left end of the pump body 10. The track channel 12 is interconnected with the power channel 11, and the track channel 12 provides a disassembly and assembly space for the working section plunger rod 61 to dock with the power section plunger rod 62. When the guide slider 44 slides downward in the guide groove 13 relative to the pump body 10 to the maximum guide sliding position of the guide groove 13, the working section plunger rod 61 and the power section plunger rod 62 are docked. Refer to the attached Figures 1 to 4 , Attachment Figure 6, Attachment Figure 7 And attached Figure 10 As shown, a hinge groove 14 is opened 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. The pump body 10 is provided with a hinge column hole 16, and the hinge column 17 is disposed 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 movable rod 18, and the other end of the movable rod 18 is rotatably connected to a pressing member 19 through a threaded rotation. The pump head body 40 is located between the pressing member 19 and the pump body 10, and the movable rod 18 is hinged to the pump body 10 through the hinge column 17. The fastening mechanism includes a movable ring rod 18 provided on the pump body 10, and a clamping assembly is provided at the other end of the movable ring rod 18, which 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 compresses and fixes the surface contact connection; the clamping assembly fixes the relative position of the pump body 10 and the pump head body 40; Refer to the attached Figure 1 To the attached Figure 4 , Attachment Figure 10 To the attached Figure 14 As shown, a movable ring groove 43 is provided on the pump head body 40, and the movable ring groove 43 provides an accommodation space for the movable ring rod 18. The movable 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 movable 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 working section plunger rod 61 and the power section plunger rod 62 are plugged in and matched, 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; 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.

[0023] By setting the movable ring rod 18, the pressing member 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 to adjust the position of the relative pump body 10 on the contact matching surface through the guide slider 44, and 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 the plug boss 63, and the pressing member 19 presses the surface contact connection between the pump head body 40 and the pump body 10. The pressing member 19 relatively increases the contact area between the pump head body 40 and the pump head body 40, and can press the pump head body at the pressing member 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 assembly and disassembly is reduced, the centering state maintenance accuracy and the docking state maintenance effect are improved, the docking stability of the segmented plunger rods is improved, the risk of internal misalignment and power transmission disconnection of the interchangeable pump head is reduced, the disassembly 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 rods and the convenience of operation are improved; At the same time, the internal power docking status can be judged according to the relative status between the movable ring rod 18, the clamping part 19 and the pump head body 40, and the leakage status of the variable cavity can be checked by connecting the leak detection hole 15 provided on the pump head body 40. The working status of the interchangeable pump head can be grasped in time without disassembly, thereby improving the convenience of status monitoring of the interchangeable pump head.

[0024] 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 those skilled in the art without departing from the concept and principle of the present invention should 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. A working chamber is provided in the pump head body (40). 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 to a plug-in boss (63). An 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 an 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). 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.

2. A detachable live ring pump head with a slot-type segmented plunger rod as claimed in claim 1, characterized in that: 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).

3. A detachable live ring pump head with a slot-type segmented plunger rod as claimed in claim 2, characterized in that: The plug-in neck groove (65) and the plug-in groove (64) cover the diameter length of the power section plunger rod (62).

4. A detachable live ring pump head with a slot-type segmented plunger rod as claimed in claim 1, characterized in that: 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.

5. A detachable live ring pump head with a slot-type segmented plunger rod as claimed in claim 4, 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).

6. A detachable live ring pump head with a slotted segmented plunger rod as claimed in claim 4, characterized in that: 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).

7. A detachable live ring pump head with a slotted segmented plunger rod as claimed in claim 6, characterized in that: The guiding direction of the guide groove (13) is in the radial direction of the power channel (11).

8. A detachable live ring pump head with a slotted segmented plunger rod as claimed in claim 7, 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).

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