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 present invention relates to the technical field of plunger pumps, and particularly to a movable ring detachable pump head with a butt-jointed segmented plunger rod. Background Art

[0002] A plunger pump is a conventional liquid variable volume mechanical pump. The movement of the plunger rod drives the change of the liquid volume in the plunger cavity, causing the change of the internal and external pressure difference, so as to absorb and discharge the liquid to achieve the purpose of transporting the fluid. In a conventional plunger pump, the plunger rod is fixedly connected to the plunger and cannot be removed together with the pump head as a whole. For industries such as hygiene and medicine with high disinfection requirements, when the equipment is shut down or the conveyed material is replaced, thorough disinfection is required. Since the plunger rod cannot be removed together with the pump head, it causes difficulties in disinfection.

[0003] The pump body centrally fixedly installs the plunger rod, the sealing assembly, etc. inside the pump body, and the power part drives the plunger rod member to reciprocate, so as to absorb and discharge the conveyed fluid within the integrated fixed pump head structure. In the existing conventional plunger pump structure, when the physical and chemical properties of the fluid conveyed by the plunger pump change with the change of the conveying conditions, the integrated plunger pump usually relies on manual removal of the pump head structure fixedly installed with the pump body to maintain the internal mechanisms such as the plunger reciprocating motion mechanism, the variable volume chamber parts, the sealing assembly, and the flow distribution structure. In addition, during the disassembly, installation and maintenance interchange process of the plunger and the pump head body, it is difficult to effectively control the influence of the precision change of the plunger friction pair on the flow state of the conveyed fluid, resulting in poor reproducibility of the fluid conveying conditions and being not conducive to high-precision fluid conveying.

[0004] In the prior art, for example, U.S. Patent No. US11319951B2 discloses a plunger pump for supplying a mobile phase. The axial plunger of this invention patent is mainly used for the flow control of conveying fluid in small flow scenarios to debug the characteristics of the conveyed fluid. By adjusting the eccentricity of the variable volume type plunger action mechanism, etc., an assembly structure with different fluid conveying specifications is realized. In this invention patent, the adjustable connection mode between the plunger rod and the plunger cavity is a surface contact fixed connection. To replace or adjust the plunger rod or the pump head, only the butt-jointed cylinder wall needs to be reinstalled or the pump head needs to be replaced. During the adjustment of the fluid conveying specifications of the plunger friction pair, local stress and circumferential sliding may easily occur. Especially when the movement transmitted by the power end changes, it may cause damage to the plunger friction pair, resulting in inaccurate fluid conveying specifications tested at the adjusted pump head, and the flow characteristics of this fluid conveying 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 butt-jointed segmented plunger rod to overcome the deficiencies in the prior art, such as low energy efficiency utilization rate of the plunger pump, poor repeatability of fluid conveying conditions, and damage to the fluid conveying state caused by the interchange of the plunger friction pair.

[0006] To solve the above technical problems, the present invention specifically provides the following technical solutions: A split plunger rod with a detachable piston ring for a docking type pump head, comprising a pump body and a pump head body. The pump body is fixedly connected to the pump head body. A volume change chamber and a plunger chamber are provided inside the pump head body. A power channel is provided inside the pump body. A plunger mechanism is provided in the plunger chamber and the power channel. A power assembly is provided inside the pump body. The plunger mechanism is composed of a volume change plunger rod and a power rod. The plunger chamber is slidably connected to the volume change plunger rod. The other end of the volume change plunger rod is provided with a power rod. The two opposite ends of the volume change plunger rod and the power rod are respectively provided with a first limit hole and a second limit hole. A gap is left between the opposite end of the second limit hole and the first limit hole in the radial direction of the plunger mechanism. The centerlines of the first limit hole and the second limit hole are both perpendicular to the axis of the plunger mechanism. The second limit hole and the first limit hole can be coaxially fitted. A fixing pin is provided in the first limit hole and the second limit hole. A track channel is provided on the pump body. By providing the first limit hole, the second limit hole, the plunger mechanism and the fixing pin, the safety of the interchangeable disassembly process of the split plunger rod is improved. The independence and accuracy of the docking positioning reference of the split plunger rod during interchangeable use are improved. The amplitude of the change in the axial friction position of the plunger pair when the split plunger rod is reused after interchange is reduced. The positioning accuracy and the stability of the working accuracy of the split plunger rod during repeated interchangeable use are improved. The influence and limitation of the change in the shape of the split plunger rod on the docking interchange are reduced.

[0007] Preferably, the two opposite ends of the volume change plunger rod and the power rod are respectively provided with a docking convex block and a docking cavity. The first limit hole is opened on the docking convex block. The second limit hole penetrates through the side wall of the docking cavity. The docking cavity is slidably connected to the docking convex block in the axial direction of the plunger mechanism. The docking cavity restricts the freedom of rotation of the docking convex block in the circumferential direction of the plunger mechanism. By providing the docking cavity, the docking convex block and the second limit hole, the risk of the expansion of the friction range in the circumferential direction of the mating cylindrical surface of the plunger pair is reduced. The damage to the plunger friction pair caused by the split interchangeable use of the plunger pair is reduced. The repeatability and stability of the oil film state of the plunger pair of the split plunger rod are improved. The stability of the flow characteristics of the fluid transported by the interchangeable pump head and the stability of the transmission accuracy are improved.

[0008] Preferably, the pump body and the pump head body are connected by a surface contact fit. A piston ring rod is provided on the pump body. The other end of the piston ring rod is rotatably connected to a pressing member for pressing the pump head body. By providing the piston ring rod, the pressing member and the track channel, the rod diameter range of the interchangeable docking of the split plunger rod is increased. The transformation cost of the existing pump head caused by the split interchange of the plunger rod is reduced.

[0009] Preferably, the piston ring rod is hinged on the pump body. A piston ring groove is provided on the pump head body. The piston ring rod stays in the piston ring groove.

[0010] Preferably, the loose ring rod presses the pressing member through a threaded connection, and the pressing member is a wing nut; By providing the loose ring rod, the pressing member, the pump body, the loose ring groove and the pump head body, the matching effect of the quick-disassembly and interchangeable pump head and the pump body power component power can be improved, the safety and conveying efficiency of the fluid conveying system can be improved, the pump body manufacturing process and the material management quality can be improved, and the expandability of the fluid conveying automation can be improved; The risk of the detachable connection of the interchangeable pump head damaging the plunger friction pair is reduced, the local stress limit value of the plunger pair transmitted by the interchangeable quick-disassembly pump head is reduced, and the anti-interference ability of the fluid transmission during the interchange of the pump head 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 communicated with 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 volume plunger rod to be positioned at the position of the docking power rod, and the track channel accommodates the docking movement of the variable volume plunger rod; By providing the power channel, the guide groove and the track channel, the fitting accuracy of the detachable pump head interchange disassembly and assembly is improved; the simplicity of the segmented plunger rod and the detachable pump head interchange operation is improved, the probability of the pump head disassembly and assembly changing the positioning accuracy is reduced, and the service life and safety of the detachable pump head interchange are improved.

[0012] Preferably, the guiding direction guided by the guide groove 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 volume plunger rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained according to the provided drawings.

[0015] Figure 1 It is a schematic diagram of the assembly relationship between the pump body and the pump head body; Figure 2 It is Figure 1 the front view schematic diagram of Figure 3 It is Figure 1 the top view schematic diagram of Figure 4 It is Figure 2 the partial enlarged schematic diagram at A in Figure 5 It is the structural schematic diagram of the pump head body; Figure 6 is Figure 5 a side view schematic diagram of; Figure 7 is a schematic diagram of the connection relationship between the plunger cavity and the plunger mechanism; Figure 8 is a schematic diagram of the structure of the pump body; Figure 9 is Figure 8 a top view schematic diagram of; Figure 10 is Figure 8 a sectional view schematic diagram at C-C in; Figure 11 is a three-dimensional structure schematic diagram of the pump body; Figure 12 is an assembly schematic diagram between the variable volume plunger rod and the power rod; Figure 13 is a schematic diagram of the connection relationship between the docking bump and the fixing pin; Figure 14 is Figure 12 a sectional view schematic diagram at K-K in; Figure 15 is a schematic diagram of the connection relationship between the first limiting hole, the second limiting hole and the fixing pin; Figure 16 is an assembly schematic diagram between the variable volume plunger rod and the power rod in the second embodiment; Figure 17 is a connection relationship schematic diagram between the variable volume plunger rod and the power rod in the second embodiment; Figure 18 is Figure 16 a sectional view schematic diagram at J-J in; Figure 19 is a connection relationship schematic diagram between the docking cavity and the side limiting groove in the second embodiment; Figure 20 is a schematic diagram of the connection scheme between the first magnet and the second magnet in the third embodiment.

[0016] Reference numerals in the drawings: pump body 10; power channel 11; trajectory channel 12; guiding groove 13; hinged groove 14; leak detection hole 15; hinged column hole 16; hinged column 17; movable ring rod 18; pressing member 19; pump head body 40; variable volume cavity 41; plunger cavity 42; movable ring groove 43; guiding slider 44; flow distribution hole 45; plunger mechanism 60; variable volume plunger rod 61; docking bump 62; fixing pin 63; power rod 64; first limiting hole 65; docking cavity 66; second limiting hole 67; plunger seal 68; side limiting groove 69; side limiting block 70; first magnet 80; second magnet 81. Detailed implementation manners

[0017] For a clearer understanding of the technical features, objectives, and effects of the present invention, the specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0018] The specific embodiments of the present invention described herein are only for the purpose of explaining the objectives of the present invention and should not be construed in any way as a limitation of the present invention. Under the guidance of the present invention, those skilled in the art can conceive of any possible variations based on the present invention, and these should all be regarded as belonging to the scope of the present invention. It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the communication inside two elements. It can 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 specific circumstances. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions used herein are only for the purpose of illustration and do not represent the only embodiments.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field 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 of the related listed items.

[0020] Embodiment 1 Referring to Figure 1 to Figure 4 , Figure 7 and Figure 10 As shown, the present invention provides a live-ring detachable pump head for a docking type segmented plunger rod, including a pump body 10 and a pump head body 40. The left end face of the pump body 10 corresponds to the right end face of the pump head body 40. The pump body 10 and the pump head body 40 are positioned and fitted by end-face docking. A variable volume chamber 41 is provided inside the pump head body 40. Fluid input and output channels are provided in the side wall of the variable volume chamber 41. The fluid input and output channels flow in and out of the transported fluid through pipes arranged on the flow distribution holes 45. A plunger chamber 42 is provided at the right end of the variable volume chamber 41. The plunger chamber 42 is in communication with the variable volume chamber 41. A plunger mechanism 60 is provided at the right end of the plunger chamber 42. The plunger chamber 42 accommodates the axial sliding of the left end of the plunger mechanism 60. The pump body 10 is relatively fixed with the pump head body 40. A plunger mechanism 60 is provided in the plunger chamber 42 and the power channel 11. Referring to Figure 7 toFigure 11 As shown, a power channel 11 is provided inside the pump body 10. The power channel 11 accommodates the axial movement of the right end of the plunger mechanism 60. A power assembly is provided inside the pump body 10. 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 volume cavity 41 to increase and decrease to complete the suction and discharge actions of transporting the fluid. Refer to the appendix Figure 7 and the appendix Figure 10 to the appendix Figure 15 As shown, the plunger mechanism 60 is composed of a variable volume plunger rod 61 and a power rod 64. The right end of the plunger cavity 42 is slidably connected to the variable volume 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. A docking convex block 62 is fixedly connected to the right end face of the variable volume plunger rod 61. The mating contour of the docking convex block 62 and the docking cavity 66 is a square structure. First limiting holes 65 and second limiting holes 67 are respectively provided at the two opposite ends of the variable volume plunger rod 61 and the power rod 64. A gap is left between the opposite ends of the second limiting hole 67 and the first limiting hole 65 in the radial direction of the plunger mechanism 60. The centerlines of the first limiting hole 65 and the second limiting hole 67 are both in the radial direction of the plunger mechanism 60. The centerlines of the first limiting hole 65 and the second limiting hole 67 can be coaxial and perpendicular to the axis of the plunger mechanism 60. The second limiting hole 67 and the first limiting hole 65 can be coaxially mated. The first limiting hole 65 is opened between the upper and lower end faces of the docking convex block 62. A docking cavity 66 is opened on the left end face of the power rod 64. The docking cavity 66 docks and accommodates the axial docking of the docking convex block 62 and the power rod 64. A second limiting hole 67 is provided 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 the same as the radial direction of the plunger mechanism 60. A fixing pin 63 is mutually mated with the first limiting hole 65 and the second limiting hole 67. The first limiting hole 65 and the second limiting hole 67 are provided with a fixing pin 63. The fixing pin 63 is used to fix the relative positions 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 volume plunger rod 61. The variable volume plunger rod 61 is installed and mated at the right end of the plunger cavity 42 through the plunger seal 68. A track channel 12 is provided on the pump body 10. The track channel 12 is a channel for disassembling, assembling, and maintaining the fixing pin 63. By setting the axes of the first limiting hole 65 and the second limiting hole 67 to be consistent with the radial direction of the plunger mechanism 60, both the first limiting hole 65 and the second limiting hole 67 cooperate with the fixing pin 63. The fixing pin 63 is used to fix the relative positions 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. It is possible to complete the docking of the variable-volume plunger rod 61 and the power rod 64 after the centerlines are coaxial in the state where the first limiting hole 65 and the second limiting hole 67 pass through the reserved gap at their relative ends. Then, under the limitation of the fixing pin 63, the docking state between the variable-volume plunger rod 61 and the power rod 64 is fixed; the gap between the opposite ends of the first limiting hole 65 and the second limiting hole 67 can reduce the requirements for the machining accuracy of the docking ends of the two when docking and positioning the variable-volume plunger rod 61 and the power rod 64. It only requires that the central axes of the first limiting hole 65 and the second limiting hole 67 be in the same direction in the radial direction of the plunger mechanism 60. At the same time, it can reduce the probability of collision during the process of positioning and docking the variable-volume plunger rod 61 and the power rod 64, improve the safety of the interchangeable disassembly and assembly process of the segmented plunger rod, improve the independence and accuracy of the docking positioning reference of the segmented plunger rod during interchangeable use, reduce the amplitude of change in the axial friction position of the plunger pair when the segmented plunger rod is used again after interchange, reduce the amplitude of change in fluid delivery conditions such as the friction area and sliding range of the plunger pair during the interchangeable disassembly and assembly process, and improve the positioning accuracy and stability of the working accuracy of the segmented plunger rod during repeated interchangeable use; The setting of a gap between the opposite ends of the first limiting hole 65 and the second limiting hole 67 can increase the radial offset range of the variable-volume plunger rod 61 and the power rod 64 during the docking of the segmented plunger rod, reduce the influence and limitation of the shape change of the segmented plunger rod on the docking interchange, increase the allowable interchangeable docking rod diameter range of the segmented plunger rod, increase the interchangeable docking rod diameter range of the segmented plunger rod, reduce the transformation cost of the existing pump head due to the segmented interchange of the plunger rod, reduce the damage to the assembly accuracy during the disassembly and assembly of the pump head, increase the applicable range of the interchangeable disassembly and assembly of the pump head, and improve the component manufacturability and material management convenience of the segmented interchange of the plunger rod; In addition, by setting the docking cavity 66 and the docking convex block 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 gap limitation range of the docking cavity 66 and the docking convex block 62. This reduces the amplitude limit value of the relative rotation of the variable-volume plunger rod 61 and the power rod 64 in their circumferential direction, reduces the risk of the expansion of the friction range of the plunger pair in the circumferential direction of the mating cylindrical surface, reduces the damage to the plunger friction pair caused by the segmented interchangeable use of the plunger pair, improves the repeatability and stability of the oil film state of the segmented plunger rod plunger pair, improves the stability and reproducibility of the working conditions of the plunger pair for transporting fluids during the disassembly and assembly of the pump head, and improves the stability of the flow characteristics and the stability of the transmission accuracy of the fluid transported by the interchangeable pump head; In addition, multiple power channels 11 can be arranged inside the pump body 10 to set multiple power rods 64. At the same time, multiple plunger cavities 42 corresponding to the positions of the power channels 11 can be arranged inside the pump head body 40 to set multiple variable-volume plunger rods 61. Multiple track channels 12 are synchronously arranged to dock multiple segmented plunger rods, so as to synchronously dock and interchange multiple plunger components on the overall cooperation of the same pump head and pump body, and further realize the regulation of more plunger delivery conditions in the interchangeable pump head structure.

[0021] Refer to the appendix Figure 7 and the appendix Figure 10 As shown, a guiding slider 44 is fixedly connected to the right end face of the pump head body 40, and a guiding groove 13 is formed on the left end face of the pump body 10. The guiding groove 13 and the guiding 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 through the guiding groove 13 to guide the guiding slider 44 and the pump head body 40 to slide towards the power channel 11 in the radial direction of the plunger mechanism 60, and guides the guiding slider 44 to slide downward in the guiding groove 13 through the guiding groove 13, thereby driving the pump head body 40 and the plunger mechanism 60 as a whole to dock at the docking position at the left end of the power channel 11. A leak detection hole 15 is provided in the side wall at 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; A track channel 12 is formed on the left end face of the pump body 10. During the process of the plunger mechanism 60 being docked in the power channel 11 in the vertical direction in the radial direction of the power channel 11 following the pump head body 40, the track channel 12 accommodates the docking movement track of the plunger mechanism 60 at the left end of the pump body 10; When the guiding slider 44 slides downward relative to the pump body 10 in the guiding groove 13 to the maximum guiding sliding position of the guiding groove 13, the docking of the plunger mechanism 60 between the plunger cavity 42 and the power channel 11 is completed; By setting the power channel 11, the guiding groove 13 and the track channel 12, the guiding groove 13 can accommodate the sliding of the guiding slider 44 and guide the variable-volume plunger rod 61 on the pump head body 40 to dock with the power rod 64, and the track channel 12 can accommodate the docking movement track of the variable-volume plunger rod 61, improving the positioning and movement accuracy of the interchange and docking process of the segmented plunger rod, reducing the collision and friction damage during the disassembly and assembly process of the interchangeable use of the segmented plunger rod, improving the disassembly and assembly speed of the segmented plunger rod interchange and the stability of the interchange and docking process, and improving the fitting accuracy of the detachable pump head interchange disassembly and assembly; at the same time, it improves the simplicity of the interchange operation of the segmented plunger rod and the detachable pump head, reduces the wear and collision of the detachable mating surface during the interchange disassembly and assembly process, reduces the probability of the pump head disassembly and assembly changing the positioning accuracy, and improves the interchange service life and safety of the detachable pump head.

[0022] Refer to the appendix Figures 1 to 4 and the appendix Figure 6 and the appendix Figure 7and attached Figure 10 As shown in Figure 10 , a hinge groove 14 is formed on the side surface of the pump body 10. A hinge column 17 is rotatably connected between two side walls of the hinge groove 14. A hinge column hole 16 is provided on the pump body 10. 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 with a movable ring rod 18. The other end of the movable ring rod 18 is rotatably connected with a pressing member 19 through a thread. The pump head body 40 is located between the pressing member 19 and the pump body 10. The movable ring rod 18 is hinged on the pump body 10 through the hinge column 17; The free rotation plane where the movable ring rod 18 is 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 rotates around the hinge column 17 towards the pump head body 40, the movable ring rod 18 is received into 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 that of the movable ring groove 43; when the pressing member 19 threadedly connected to the left end of the movable ring rod 18 rotates forward, it moves to the right, thereby providing a rightward extrusion force to the pump head body 40, thereby increasing the friction between the left end face of the pump body 10 and the right end face of the pump head body 40. The extrusion force provided by the pressing member 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 member 19 rotates reversely on the movable ring rod 18, the pressing member 19 moves in a direction relatively away from the hinge column 17 on the movable ring rod 18, thereby releasing the extrusion force on the pump head body 40, and after rotating the movable ring rod 18 towards the direction away from the pump head body 40 on the hinge column 17, the movable ring rod 18 disengages from the accommodation of the movable ring groove 43, thereby releasing the freedom degree of the pump head body 40 to slide on the left end face of the pump body 10; By providing the surface contact fit connection between the pump body 10 and the pressing member 19 and the pressing fit between the movable ring rod 18 and the pressing member 19, different delivery specification pump heads can be switched on the same pump body power assembly, improving the interchangeability and convenience of the quick-release pump head, improving the adaptation effect of the power of the quick-release interchangeable pump head and the pump body power assembly, and reducing the energy consumption of fluid delivery; It improves the regulation and application effect of the fluid delivery system parameter change delivery, improves the stability of the delivery state of the quick-release pump head interchangeably delivering fluid, improves the flexibility of the fluid delivery system regulation, improves the safety and delivery efficiency of the fluid delivery system; It improves the pump body manufacturing processability and material management quality, reduces the transformation cost of the existing delivery system, improves the layout and regulation accuracy of the variable specification fluid delivery system, improves the convenience of the fluid delivery system layout, maintenance, expansion and upgrade, and improves the expansion performance of the fluid delivery automation.

[0023] By setting the cooperation of the movable ring rod 18 and the pressing member 19 to tightly press and stabilize the relative state of the pump head body 40 and the pump body 10, the movable ring groove 43 accommodates the movable ring rod 18, and the two cooperate to limit the degree of freedom of the pump head body 40, reducing the amplitude of the movement of the quick-release interchangeable pump head directly transmitted to the plunger rod relative to the pump body 10, reducing the probability of the detachable pump head transmitting the radial torque to damage the docking state of the plunger rod, reducing the risk of the detachable connection of the interchangeable pump head damaging the plunger friction pair, reducing the local stress limit value of the interchangeable quick-release pump head transmitting damage to the plunger pair, and improving the anti-interference ability of the pump head interchange for fluid transmission.

[0024] Embodiment 2 Refer to the attached Figures 16 to 19 As shown, the mating profile between the outer profile of the docking convex block 62 and the inner profile of the docking cavity 66 is a circular structure. A side limiting block 70 is provided on the side surface of the outer profile of the docking convex block 62, and a side limiting groove 69 is provided on the inner wall of the docking cavity 66. The side limiting groove 69 and the side limiting block 70 cooperate with each other, and the side limiting block 70 and the side limiting groove 69 cooperate with each other to limit the relative rotational degree of freedom of the docking convex block 62 in the docking cavity 66. By setting the side limiting groove 69 and the side limiting block 70 to limit the relative circumferential rotation between the second limiting hole 67 and the first limiting hole 65, the tightness of the position limiting cooperation between the docking cavity 66 and the first limiting hole 65 and the fixed pin member 63 can be improved, further reducing the amplitude of the relative rotation of the variable volume plunger rod 61 relative to the power rod 64, suppressing the formation of vibration noise of the segmented plunger rod, improving the accuracy of the axial positioning and docking of the segmented plunger rod, reducing the local rotational friction amplitude of the plunger friction pair of the segmented plunger rod in the circumferential direction, and reducing the risk of sudden change in the friction working condition of the plunger pair for fluid transmission during interchangeable use.

[0025] Embodiment 3 See the attached Figure 20 As shown, this embodiment provides a replacement scheme for the plunger mechanism 60. An installation groove is provided on the side of the variable volume plunger rod 61 relative to the power rod 64, and a first magnet 80 is assembled in the installation groove. An installation groove is provided on the side of the power rod 64 relative to the variable volume plunger rod 61, and a second magnet 81 is assembled in the installation groove, which is beneficial to making the magnets located at the center positions of the respective rod ends, so that the first magnet 80, the second magnet 81, and the plunger mechanism 60 are subject to balanced lateral restraint forces during movement, and can reduce the rotation of the components of the plunger mechanism 60 caused by the eccentricity of the first magnet 80 and the second magnet 81 relative to the plunger mechanism 60 at the connection, thereby reducing the wear of the pump body 10 and the inner cavity of the pump head body 40 caused by the torsion of the plunger mechanism 60.

[0026] The first magnet 80 and the second magnet 81 can adsorb or separate, and the first magnet 80 and the second magnet 81 can be demagnetized through a demagnetizer. The demagnetizer enters through the track channel 12 and acts on the first magnet 80 and the second magnet 81.

[0027] The first magnet 80 has a first end face, and the second magnet 81 has a second end face. The first end face and the second end face are parallel and cooperatively arranged. The parallel end faces enable the first magnet 80 and the second magnet 81 to have a relatively stable contact surface, which on the one hand reduces the manufacturing difficulty of the magnetic block, and on the other hand, even in the case where the initial positioning before the assembly of the variable volume plunger rod 61 and the power rod 64 is not achieved, the rapid connection of the rod bodies can be realized through the cooperation of the parallel end faces, optimizing the attitude calibration work before the assembly of the variable volume plunger rod 61 and the power rod 64 and improving the connection efficiency of the variable volume plunger rod 61 and the power rod 64.

[0028] There is a gap between the variable volume plunger rod 61 and the power rod 64 on the outer side where the first magnet 80 contacts the second magnet 81. The design scheme of the magnet makes the plunger mechanism 60 simpler in structure on the one hand, simplifies the disassembly and assembly process, and reduces the cost. On the other hand, the gap between the variable volume plunger rod 61 and the power rod 64 can form an accommodation space, so that metal debris generated after the wear of the equipment can be adsorbed, while reducing equipment wear and extending the service life of the components. And, since the demagnetizer and other demagnetization devices can be non-contact with the magnetic block during demagnetization, when an accident occurs to the plunger pump, such as a switch failure or equipment conduction, and it is necessary to stop working urgently, the personnel can also demagnetize the magnetic block to disconnect the connection state between the variable volume plunger rod 61 and the power rod 64, thereby forcing the plunger pump to stop working and avoiding the occurrence of accidents.

[0029] In this embodiment, the number of the plunger mechanisms 60 is at least one, and the specific number is selected according to the actual production and use requirements. For example, 2 plunger mechanisms 60 can be a group, and 1 group, 2 groups, 3 groups, 4 groups, 5 groups, 6 groups, 7 groups, 8 groups, 9 groups, 10 groups, 11 groups... can be selected according to production requirements.

[0030] In this embodiment, the first magnet 80 and the second magnet 81 include but are not limited to permanent magnets, materials with magnetic adsorption, or electromagnets, etc.

[0031] The above is only a schematic specific 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 principles 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); The pump body (10) and the pump head body (40) are connected by surface contact, the pump body (10) is provided with a movable ring rod (18), the other end of the movable ring rod (18) is rotatably connected to a pressing piece (19), and the pressing piece (19) is used to press the pump head body (40); 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).

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 claim 1, 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).

4. A detachable pump head with a movable ring for a docking-type segmented plunger rod as claimed in claim 1, 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.

5. A detachable pump head with a movable ring for a docking-type segmented plunger rod as claimed in claim 1, characterized in that: The guiding direction of the guide groove (13) for guiding positioning is the radial direction of the plunger mechanism (60).

6. A detachable pump head with a movable ring for a docking-type segmented plunger rod as claimed in claim 5, 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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