Movable ring detachable pump head of butt joint type segmented plunger rod

Abstract

The invention discloses a movable ring detachable pump head of a butt joint 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. According to the invention, the first limiting hole, the second limiting hole, the plunger mechanism and the fixing pin piece are arranged, so that the independence and the accuracy of the butt joint positioning reference of the segmented plunger rod during interchange use are improved, and the stability of the positioning precision and the working precision of the segmented plunger rod during repeated interchange use is improved; and the influence and limitation of the appearance change of the segmented plunger rod on butt joint exchange are reduced. By arranging the butt joint cavity, the butt joint protruding block and the second limiting hole, damage to a plunger friction pair caused by segmented interchange use of the plunger pair is reduced, repeatability and stability of the oil film state of the segmented plunger rod and the plunger pair are improved, and stability of the flow characteristic of pump head interchange conveying fluid is improved.

Description

Technical Field

[0001] The invention relates to the technical field of plunger pumps, in particular to a movable ring detachable pump head of a docking 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 US11319951B2 discloses a plunger pump for mobile phase supply. The axial plunger of this invention patent is mainly used for the flow control of fluid delivery in small flow scenarios to adjust the characteristics of the delivered fluid, and to achieve assembly structures with different fluid delivery specifications by adjusting the eccentricity of the variable-volume plunger action mechanism. In this invention patent, the adjustable connection between the plunger rod and the plunger cavity is a surface contact fixed connection. To replace and adjust the plunger rod or the pump head, the only way is to reinstall the docking cylinder wall or replace the pump head. In the process of adjusting the fluid delivery specifications, the plunger friction pair may be prone to local stress and circumferential sliding, etc., especially when the motion transmitted by the power end changes, the plunger friction pair may be damaged, which may cause inaccurate fluid transmission specifications tested at the adjustment pump head, and the flow characteristics of the fluid delivery may be more affected by the plunger assembly. Summary of the invention

[0005] The purpose of the present invention is to provide a movable ring detachable pump head with a docking 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: A butt-jointed segmented plunger rod movable ring detachable pump head comprises a pump body and a pump head body, wherein the pump body is fixedly connected to the pump head body, a volume change chamber and a plunger chamber are arranged in the pump head body, a power channel is arranged in the pump body, a plunger mechanism is arranged in the plunger chamber and the power channel, and a power component is arranged in the pump body. The plunger mechanism is composed of a variable-capacity plunger rod and a power rod. The plunger cavity is slidably connected to the variable-capacity plunger rod. The other end of the variable-capacity plunger rod is provided with a power rod. The two opposite ends of the variable-capacity plunger rod and the power rod are respectively provided with a first limiting hole and a second limiting hole. A gap is left between the second limiting hole and the opposite end of the first limiting hole in the radial direction of the plunger mechanism. The center lines of the first limiting hole and the second limiting hole are both perpendicular to the axis of the plunger mechanism. The second limiting hole and the first limiting hole can be coaxially matched. Fixed pins are provided in the first limiting hole and the second limiting hole, and a track channel is provided on the pump body. By providing the first limiting hole, the second limiting hole, the plunger mechanism and the fixing pin, the safety of the segmented plunger rod interchangeable assembly and disassembly process is improved, the independence and accuracy of the docking positioning reference of the segmented plunger rod during interchangeable use is improved, the magnitude of the change in the axial friction position of the plunger pair when the segmented plunger rod is used again after interchange is reduced, the positioning accuracy and working accuracy stability of the segmented plunger rod during repeated interchangeable use are improved, and the influence and limitation of the segmented plunger rod shape change on the docking interchangeability are reduced.

[0007] Preferably, the two opposite ends of the variable-capacity plunger rod and the power rod are respectively provided with a docking protrusion and a docking cavity, the first limiting hole is opened on the docking protrusion, the second limiting hole penetrates the side wall of the docking cavity, the docking cavity is slidably connected to the docking protrusion in the axial direction of the plunger mechanism, and the docking cavity limits the freedom of rotation of the docking protrusion in the circumferential direction of the plunger mechanism; By providing a docking cavity, a docking protrusion and a second limiting hole, the risk of expansion of the friction range of the plunger pair in the circumferential direction of the mating cylinder is reduced, the damage to the plunger friction pair caused by the interchangeable use of the plunger pair in segments is reduced, the repeatability and stability of the oil film state of the segmented plunger rod plunger pair are improved, and the stability of the flow characteristics of the fluid transported by the pump head interchangeably and the stability of the transmission accuracy are improved.

[0008] Preferably, the pump body and the pump head body are connected by surface contact, a movable ring rod is provided on the pump body, and a pressing piece is rotatably connected to the other end of the movable ring rod, and the pressing piece is used to press the pump head body; By providing a movable ring rod, a pressing piece and a track channel, the rod diameter range of the segmented plunger rod interchangeable and docking is increased, and the modification cost of the existing pump head for the segmented interchange of the plunger rod is reduced.

[0009] Preferably, the movable ring rod is hinged on the pump body, and a movable ring groove is provided on the pump head body, and the movable ring rod stays in the movable ring groove.

[0010] Preferably, the movable ring rod is connected to the pressing member via a thread, and the pressing member is a butterfly nut; By arranging the movable ring rod, the pressing piece, the pump body, the movable ring groove and the pump head body, the adaptability effect of the quick-release interchangeable pump head and the power of the pump body power assembly can be improved, the safety and delivery efficiency of the fluid delivery system can be improved, the manufacturing processability of the pump body and the quality of material management can be improved, and the expansion performance of fluid delivery automation can be improved; The risk of damaging the plunger friction pair by the detachable connection of interchangeable pump heads is reduced, the local stress limit of the plunger pair caused by the transfer of interchangeable quick-release pump heads is reduced, and the anti-interference ability of fluid transmission during interchangeable pump heads is improved.

[0011] Preferably, a guide groove and a track channel are provided in the mating surface of the pump body, one end of the power channel facing the mating surface is connected to the track channel, a guide slider is fixedly connected to the mating surface of the pump head body, the guide slider is slidably connected in the guide groove, the guide groove guides the variable capacity plunger rod to be positioned to the position of docking with the power rod, and the track channel accommodates the docking movement of the variable capacity plunger rod; By setting up a power channel, a guide groove and a trajectory channel, the matching accuracy of the interchangeable disassembly and assembly of the detachable pump head is improved; the convenience of the interchangeable operation of the segmented plunger rod and the detachable pump head is improved, the probability of changing the positioning accuracy during the disassembly and assembly of the pump head is reduced, and the service life and safety of the interchangeable detachable pump head are improved.

[0012] Preferably, the guiding direction of the guide groove for guiding positioning is the radial direction of the plunger mechanism.

[0013] Preferably, a gap is left between the side wall of the power channel and the variable capacity plunger rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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.

[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 A schematic diagram of the main view; Figure 3 yes Figure 1 Schematic diagram of top view; Figure 4 yes Figure 2 A local enlarged schematic diagram of the middle A; Figure 5 It is a schematic diagram of the structure 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; Fig. 9 yes Figure 8 Schematic diagram of top view; Fig.10 yes Figure 8 Schematic cross-sectional view at CC in the middle; Fig.11 It is a schematic diagram of the three-dimensional structure of the pump body; Fig.12 It is a schematic diagram of the assembly between the variable plunger rod and the power rod; Fig.13 is a schematic diagram of the connection relationship between the docking protrusion and the fixing pin; Fig.14 yes Fig.12 A schematic cross-sectional view at KK in the middle; Fig.15 is a schematic diagram of the connection relationship between the first limiting hole, the second limiting hole and the fixing pin; Fig.16 is a schematic diagram of the assembly between the variable capacity plunger rod and the power rod in the second embodiment; Fig.17 is a schematic diagram of the connection relationship between the variable capacity plunger rod and the power rod in the second embodiment; Fig.18 yes Fig.16 A schematic cross-sectional view of the JJ position in the middle; Fig.19 It is a schematic diagram of the connection relationship between the docking cavity and the side limit groove in the second embodiment.

[0016] 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; live ring rod 18; pressing piece 19; pump head body 40; variable cavity 41; plunger cavity 42; live ring groove 43; guide slider 44; distribution hole 45; plunger mechanism 60; variable plunger rod 61; docking protrusion 62; fixing pin 63; power rod 64; first limit hole 65; docking cavity 66; second limit hole 67; plunger seal 68; side limit groove 69; side limit block 70. 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 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.

[0019] 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.

[0020] Embodiment 1 Refer to the attached Figure 1 To Attachment Figure 4 , Attachment Figure 7 And attached Fig.10 As shown, the present invention provides a movable ring detachable pump head with a docking type segmented plunger rod, comprising a pump body 10 and a pump head body 40, wherein the positions of the left end face of the pump body 10 and the right end face of the pump head body 40 correspond to each other, and the pump body 10 and the pump head body 40 are positioned and matched by end-face docking, and a variable cavity 41 is provided in the pump head body 40, and a fluid input and output channel is provided in the side wall of the variable cavity 41, and the fluid input and output channels flow in and out of the transported fluid through a pipeline provided on a distribution hole 45, and a plunger cavity 42 is provided at the right end of the variable cavity 41, and the plunger cavity 42 is communicated with the variable cavity 41, and a plunger mechanism 60 is provided at the right end of the plunger cavity 42, and the plunger cavity 42 accommodates the axial sliding of the left end of the plunger mechanism 60; the pump body 10 is relatively fixed to the pump head body 40, and the plunger mechanism 60 is provided in the plunger cavity 42 and the power channel 11; Refer to the attached Figure 7 To Attachment Fig.11As shown, a power channel 11 is provided in the pump body 10, and the power channel 11 accommodates the axial movement of the right end of the plunger mechanism 60. 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 cavity 42, thereby driving the pressure in the variable cavity 41 to increase and decrease to complete the suction and discharge action of the conveyed fluid; See attached Figure 7 , Attachment Fig.10 To Attachment Fig.15 As shown, the plunger mechanism 60 is composed of a variable plunger rod 61 and a power rod 64. The right end of the plunger cavity 42 is slidably connected to the variable plunger rod 61 in its axial direction through a plunger seal 68. The left end of the power channel 11 is provided with a power rod 64. The power channel 11 accommodates the axial movement of the power rod 64. The right end face of the variable plunger rod 61 is fixedly connected with a docking protrusion 62. The matching contour of the docking protrusion 62 and the docking cavity 66 is a square structure. The two opposite ends of the variable plunger rod 61 and the power rod 64 are respectively provided with a first limiting hole 65 and a second limiting hole 67. The second limiting hole 67 and the opposite end of the first limiting hole 65 leave a gap in the radial direction of the plunger mechanism 60. The center lines of the first limiting hole 65 and the second limiting hole 67 are both radial to the plunger mechanism 60. The center lines of the first limiting hole 65 and the second limiting hole 67 can be coaxial and perpendicular to the plunger mechanism 60. The axis of the second limiting hole 67 and the first limiting hole 65 can be coaxially matched, a first limiting hole 65 is opened between the upper and lower end surfaces of the docking protrusion 62, and a docking cavity 66 is opened on the left end surface of the power rod 64. The docking cavity 66 docks to accommodate the axial docking of the docking protrusion 62 and the power rod 64. A second limiting hole 67 is arranged in the side wall of the docking cavity 66. The axial directions of the second limiting hole 67 and the first limiting hole 65 are consistent with the radial direction of the plunger mechanism 60. The fixing pin 63 cooperates with the first limiting hole 65 and the second limiting hole 67. The first limiting hole 65 and the second limiting hole 67 are equipped with a fixing pin 63, and the fixing pin 63 is used to fix the relative position between the first limiting hole 65 and the second limiting hole 67; a plunger seal 68 is provided at the left end of the variable plunger rod 61, and the variable plunger rod 61 is installed and matched at the right end of the plunger cavity 42 through the plunger seal 68; The pump body 10 is provided with a track channel 12, which is a channel for disassembling and maintaining the fixing pin 63; By setting the axis of the first limiting hole 65 and the second limiting hole 67 to be consistent with the radial direction of the plunger mechanism 60, the first limiting hole 65 and the second limiting hole 67 both cooperate with the fixing pin 63, and the fixing pin 63 is used to fix the relative position between the first limiting hole 65 and the second limiting hole 67. A gap is left between the two opposite ends of the second limiting hole 67 and the first limiting hole 65, and the center lines of the variable plunger rod 61 and the power rod 64 can be made coaxial by reserving a gap between the opposite ends of the first limiting hole 65 and the second limiting hole 67 to complete the docking of the variable plunger rod 61 and the power rod 64, and then the docking state between the variable plunger rod 61 and the power rod 64 is kept fixed under the limitation of the fixing pin 63; the gap between the opposite ends of the first limiting hole 65 and the second limiting hole 67 can be When the variable-position plunger rod 61 and the power rod 64 are connected, the processing accuracy requirements of the connecting ends of the two are reduced. It is only necessary to keep the central axes of the first limiting hole 65 and the second limiting hole 67 in the same radial direction of the plunger mechanism 60. At the same time, the probability of collision during the positioning and connecting process of the variable-position plunger rod 61 and the power rod 64 can be reduced, the safety of the interchangeable and disassembly process of the segmented plunger rod is improved, the independence and accuracy of the docking positioning reference of the segmented plunger rod during interchangeable use are improved, the amplitude of the change of the axial friction position of the plunger pair when the segmented plunger rod is used again after interchange is reduced, the amplitude of the change of the fluid conveying conditions such as the friction area and sliding range of the plunger pair during the interchangeable and disassembly process is reduced, and the positioning accuracy and working accuracy stability of the segmented plunger rod when it is repeatedly interchanged are improved; The gap is set at the opposite ends of the first limiting hole 65 and the second limiting hole 67, which can increase the radial offset range of the variable plunger rod 61 and the power rod 64 when the segmented plunger rods are docked, reduce the influence and limitation of the segmented plunger rod shape change on docking and interchangeability, increase the rod diameter range of the segmented plunger rods that are allowed to be interchanged and docked, increase the rod diameter range of the segmented plunger rods that are interchangeable and docked, reduce the modification cost of the existing pump head due to the segmented interchange of the plunger rods, reduce the damage to the assembly accuracy of the pump head by disassembly and assembly, increase the applicable scope of the interchangeable and disassembly of the pump head, and improve the processability of the parts and materials management convenience of the segmented interchange of the plunger rods; In addition, by setting the docking cavity 66 and the docking protrusion 62 to slide and cooperate to limit the freedom of relative rotation of the first limiting hole 65 and the second limiting hole 67 in the circumferential direction of the plunger mechanism 60, the relative rotation of the first limiting hole 65 and the second limiting hole 67 in the circumferential direction of the plunger mechanism 60 is limited within the clearance limit range of the docking cavity 66 and the docking protrusion 62, thereby reducing the amplitude limit value of the relative rotation of the variable plunger rod 61 and the power rod 64 in the circumferential direction thereof, reducing the risk of the expansion of the friction range of the plunger pair in the circumferential direction of the matching cylindrical surface, reducing the damage to the plunger friction pair caused by the segmented interchangeable use of the plunger pair, improving the repeatability and stability of the oil film state of the segmented plunger rod plunger pair, improving the working condition stability and reproducibility of the disassembly and assembly of the pump head plunger pair to transport the fluid, and improving the stability of the flow characteristics and the stability of the transmission accuracy of the pump head interchangeable transport of the fluid; In addition, a plurality of power channels 11 can be provided in the pump body 10 to set a plurality of power rods 64, and 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 variable-capacity plunger rods 61, and a plurality of trajectory channels 12 are synchronously provided to connect a plurality of plunger rod segments, so that a plurality of 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 conveying conditions in the pump head interchangeable use structure.

[0021] 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, and the guide groove 13 and the guide slider 44 cooperate with each other; 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 to stop at the docking position at the left end of the power channel 11 as a whole, and a leak detection hole 15 is provided in the side wall of the lower end of the power channel 11, and the leak detection hole 15 is used to check the liquid leakage condition at the end of the plunger cavity 42; The left end surface of the pump body 10 is provided with a track channel 12. When the plunger mechanism 60 follows the pump head body 40 to dock in the power channel 11 in the vertical direction of the radial direction of the power channel 11, the track channel 12 accommodates the docking motion track of the plunger mechanism 60 at the left end of the pump body 10. 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 plunger mechanism 60 completes the docking between the plunger cavity 42 and the power channel 11; By setting the power channel 11, the guide groove 13 and the track channel 12, the guide slider 44 can be accommodated in the guide groove 13 to slide and guide the variable-capacity plunger rod 61 on the pump head body 40 to dock with the power rod 64, and the docking movement trajectory of the variable-capacity plunger rod 61 can be accommodated through the track channel 12, thereby improving the accuracy of positioning and movement during the interchangeable docking process of the segmented plunger rods, reducing the collision and friction damage during the disassembly and assembly process of the segmented plunger rods for interchangeable use, improving the interchangeable disassembly and assembly speed of the segmented plunger rods and the stability of the interchangeable docking process, and improving the matching accuracy of the interchangeable disassembly and assembly of the detachable pump head; at the same time, the convenience of the interchangeable operation of the segmented plunger rod and the detachable pump head is improved, the wear and collision of the detachable mating surface during the interchangeable disassembly and assembly process is reduced, the probability of changing the positioning accuracy during the disassembly and assembly of the pump head is reduced, and the interchangeable service life and safety of the detachable pump head are improved.

[0022] See attached Figures 1 to 4 , Attachment Figure 6 , Attachment Figure 7And 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; 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 the two, the extrusion force provided by the pressing piece 19 maintains the 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 pressing piece 19 is reversed on the movable ring rod 18, the pressing 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 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; By providing a surface contact fitting connection between the pump body 10 and the pressing piece 19 and a pressing fit between the movable ring rod 18 and the pressing piece 19, pump heads of different delivery specifications can be switched on the same pump body power assembly, thereby improving the convenience of interchangeable use of quick-release pump heads, improving the adaptation effect of the power of quick-release interchangeable pump heads and pump body power assembly, and reducing the energy consumption of fluid delivery; Improve the regulation and application effect of fluid delivery system parameter changes, improve the stability of the delivery state of the quick-release pump head interchangeable fluid, improve the flexibility of fluid delivery system regulation, and improve the safety and delivery efficiency of the fluid delivery system; Improve the manufacturing processability of pump bodies and the quality of material management, reduce the cost of modifying existing conveying systems, improve the layout and control accuracy of variable-specification conveying fluid systems, improve the convenience of laying out, maintaining, expanding and upgrading fluid conveying systems, and improve the expandability of fluid conveying automation.

[0023] By setting the movable ring rod 18 and the clamping piece 19 to cooperate and compress the relative state of the pump head body 40 and the pump body 10 to stabilize, the movable ring groove 43 accommodates the movable ring rod 18. The two cooperate to limit the freedom of the pump head body 40, thereby reducing the amplitude of the movement of the quick-release interchangeable pump head relative to the pump body 10 directly transmitted to the plunger rod, reducing the probability of the detachable pump head transmitting radial torque to destroy the docking state of the plunger rod, reducing the risk of the detachable connection used for interchangeable pump heads damaging the plunger friction pair, reducing the local stress limit value of the plunger pair that is damaged by the interchangeable quick-release pump head, and improving the anti-interference ability of the pump head interchange for fluid transmission.

[0024] Embodiment 2 Referring to the drawings shown in 16 to 19, the matching contour between the outer contour of the docking protrusion 62 and the inner contour of the docking cavity 66 is a circular structure, and a side limit block 70 is provided on the side of the outer contour of the docking protrusion 62, and a side limit groove 69 is provided on the inner wall of the docking cavity 66. The side limit groove 69 cooperates with the side limit block 70, and the side limit block 70 and the side limit groove 69 cooperate with each other to limit the relative rotation freedom of the docking protrusion 62 in the docking cavity 66; By setting the side limit groove 69 and the side limit block 70 to limit the relative circumferential rotation between the second limit hole 67 and the first limit hole 65, the tightness of the position limiting fit between the docking cavity 66 and the first limit hole 65 and the fixing pin 63 can be improved, and the rotation amplitude of the variable piston rod 61 relative to the power rod 64 can be further reduced, which can suppress the formation of vibration noise of the segmented piston rod, improve the accuracy of axial positioning docking of the segmented piston rod, reduce the local rotation friction amplitude of the piston friction pair of the segmented piston rod in the circumferential direction, and reduce the risk of sudden changes in the friction conditions of the interchangeable piston pairs transmitting fluids.

[0025] 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 butt-jointed segmented plunger rod movable ring detachable pump head, comprising a pump body (10) and a pump head body (40), wherein the pump head body (40) is provided with a volume change chamber (41) and a plunger chamber (42), wherein the pump body (10) is provided with a power channel (11), and wherein the plunger chamber (42) and the power channel (11) are provided with a plunger mechanism (60), characterized in that: The plunger mechanism (60) is composed of a variable-capacity plunger rod (61) and a power rod (64); the plunger cavity (42) is slidably connected to the variable-capacity plunger rod (61); two opposite ends of the variable-capacity plunger rod (61) and the power rod (64) are respectively provided with a first limiting hole (65) and a second limiting hole (67); a gap is left between the second limiting hole (67) and the opposite end of the first limiting hole (65) in the radial direction of the plunger mechanism (60); the center lines of the first limiting hole (65) and the second limiting hole (67) are both perpendicular to the axis of the plunger mechanism (60); the second limiting hole (67) and the first limiting hole (65) can be coaxially matched; fixing pins (63) are provided in the first limiting hole (65) and the second limiting hole (67); and a track channel (12) is provided on the pump body (10).

2. A detachable pump head with a movable ring for a docking-type segmented plunger rod as claimed in claim 1, characterized in that: The two opposite ends of the variable-capacity plunger rod (61) and the power rod (64) are respectively provided with a docking protrusion (62) and a docking cavity (66); the first limiting hole (65) is opened on the docking protrusion (62); the second limiting hole (67) passes through the side wall of the docking cavity (66); the docking cavity (66) is slidably connected to the docking protrusion (62) in the axial direction of the plunger mechanism (60); and the docking cavity (66) limits the freedom of rotation of the docking protrusion (62) in the circumferential direction of the plunger mechanism (60).

3. A detachable pump head with a movable ring for a docking-type segmented plunger rod as claimed in any one of claims 1 to 2, characterized in that: The pump body (10) and the pump head body (40) are connected by surface contact, and a movable ring rod (18) is provided on the pump body (10). The other end of the movable ring rod (18) is rotatably connected to a pressing piece (19), and the pressing piece (19) is used to press the pump head body (40).

4. A movable ring detachable pump head with a docking-type segmented plunger rod as claimed in claim 3, characterized in that: The movable ring rod (18) is hinged on the pump body (10), and a movable ring groove (43) is provided on the pump head body (40), and the movable ring rod (18) stays in the movable ring groove (43).

5. A detachable pump head with a movable ring for a docking-type segmented plunger rod as claimed in claim 3, characterized in that: The movable ring rod (18) is connected to the pressing piece (19) via a thread, and the pressing piece (19) is a butterfly nut.

6. A movable ring detachable pump head with a docking-type segmented plunger rod as claimed in claim 3, characterized in that: A guide groove (13) and the track channel (12) are provided in the mating surface of the pump body (10); one end of the power channel (11) facing the mating surface is connected to the track channel (12); a guide slider (44) is fixedly connected to the mating surface of the pump head body (40); the guide slider (44) is slidably connected in the guide groove (13); the guide groove (13) guides the variable-capacity plunger rod (61) to be positioned to a position where it docks with the power rod (64); and the track channel (12) accommodates the docking movement of the variable-capacity plunger rod (61).

7. A movable ring detachable pump head with a docking-type segmented plunger rod as claimed in claim 6, characterized in that: The guiding direction of the guide groove (13) for guiding positioning is the radial direction of the plunger mechanism (60).

8. A detachable pump head with a movable ring for a docking-type segmented plunger rod as claimed in claim 7, characterized in that: A gap is left between the side wall of the power channel (11) and the variable-capacity plunger rod (61).

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