Rotary plunger pump head structure capable of being cleaned on line and servo vertical plunger pump set

Abstract

The utility model provides a rotary plunger pump head structure capable of cleaning on line and a servo vertical plunger pump set, the rotary plunger pump head structure capable of cleaning on line comprises a pump head main body, a ceramic plunger sleeve and a ceramic plunger, the upper part of the pump head main body is communicated with a cleaning input port, the bottom of the pump head main body is connected with a valve, the valve is communicated with a cleaning output port, and the ceramic plunger sleeve is communicated with the cleaning output port. The ceramic plunger is provided with a notch; the servo vertical plunger pump set comprises a servo driving assembly, and the servo driving assembly drives a ceramic plunger to rotate and stretch out and draw back. By means of the on-line cleaning function, a determination reagent permeating into a gap can be effectively removed, cross contamination can be avoided, the accuracy of a determination result is improved, the service life of a pump is prolonged, and the quantitative accuracy is kept; by combining the servo driving assembly with the rotary plunger pump head structure, precise control over rotation and stretching of the ceramic plunger is achieved, the working stability and reliability of the pump are improved, and meanwhile the effects of high metering precision, constant liquid outlet flow and wide application range are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of plunger pump liquid injection, in particular to a rotary plunger pump head structure capable of being cleaned online and a servo vertical plunger pump group. Background Art

[0002] In modern industrial production and daily life, metering pumps, as an important fluid delivery equipment, are widely used in chemical, petroleum, pharmaceutical, food, water treatment and other fields. The main function of a metering pump is to deliver liquid media from one place to another at a predetermined flow rate and pressure, while ensuring a stable and accurate flow rate during the delivery process.

[0003] RL metering pump is a plunger type precision metering pump used for quantitative perfusion of chemical liquids and high-purity liquids.

[0004] Reciprocating positive displacement metering pumps, such as plunger pumps and diaphragm pumps, use the reciprocating motion of pistons or diaphragms to transport liquids. This type of pump has high metering accuracy, but due to the limitations of its working principle, it can only achieve metering per reciprocating cycle and cannot achieve continuous metering under constant flow conditions. At the same time, the one-way valve or reversing valve in the reciprocating positive displacement metering pump needs to be opened and closed frequently, which can easily lead to damage; the seals are also easily damaged, especially when dealing with high-viscosity liquid media, which will affect its metering accuracy.

[0005] Ceramic plunger pumps are widely used in medical testing, environmental engineering and other fields due to their good corrosion resistance and high quantitative accuracy. In actual applications, due to the need to switch different test reagents, after quantitatively delivering the test reagents, the pump body needs to be cleaned with a cleaning fluid. Since there is a tiny gap between the plunger and the plunger sleeve, when delivering the test reagent, the test reagent will gradually penetrate into the gap between the plunger and the plunger sleeve as the ceramic plunger moves linearly and rotationally. However, it is difficult to clean the test reagent that has penetrated into the gap with the existing cleaning method, resulting in the possibility of mixing with the previous test reagent when switching the test reagent, causing cross contamination and affecting the accuracy of the test result. In addition, since some test reagents will crystallize after being deposited for a period of time, and the gap between the ceramic plunger and the plunger sleeve is very small, after long-term operation, the test reagent that has penetrated into the gap will crystallize, causing wear of the ceramic plunger and the plunger sleeve, affecting the service life and quantitative accuracy of the pump. Utility Model Content

[0006] The purpose of the utility model is to provide a rotary plunger pump head structure and a servo vertical plunger pump group that can be cleaned online, aiming to solve the shortcomings of existing metering pump technology in achieving high-precision, leak-free, long-life and easy-to-maintain continuous constant flow delivery, especially the problems of cross contamination and component wear that are prone to occur when processing high-viscosity liquids and frequently switching between different media.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] Provided is a rotary plunger pump head structure that can be cleaned online, comprising a pump head body, a ceramic plunger sleeve arranged on the inner side of the pump head body, and a ceramic plunger movably inserted into the ceramic plunger sleeve, a liquid suction inlet and a liquid pushing outlet connected to the ceramic plunger sleeve are arranged in the middle of the pump head body, a cleaning input port is connected to the ceramic plunger sleeve at the upper side of one side of the pump head body, a valve is connected to the bottom of the pump head body, and a cleaning output port is connected to one side of the valve, and a notch is opened on the outer periphery of the ceramic plunger.

[0009] Preferably, the pump head main body includes a pump body and a cover body covered on the bottom of the pump body, the valve includes a valve seat penetrated through the cover body, the valve seat is fixed to the bottom of the pump body through the cover body, and a cleaning output port connected to the valve is opened on one side of the valve seat.

[0010] Preferably, the valve includes a guide sleeve passing through the valve seat, a connecting rod is movably passed through the middle of the guide sleeve, one end of the connecting rod located at the pump body is connected to a plug, and the other end of the connecting rod is connected to a push head.

[0011] Preferably, a guide seat is fixedly connected to the bottom of the valve seat, and the guide seat is provided with an inner groove for accommodating a push head, and enables the push head to translate axially along the depth direction of the inner groove, and the connecting rod is located between the push head and the guide seat and is provided with a return spring.

[0012] Preferably, the plug is in a conical structure, and the valve seat has a conical groove structure corresponding to the plug, so that the plug cooperates with the valve seat, and a sealing ring is connected to the inner periphery of the conical groove.

[0013] Preferably, the liquid suction inlet, the liquid pushing outlet, the cleaning input port and the cleaning output port are all connected with connectors.

[0014] Preferably, the height of the notch is greater than or equal to the height of the liquid suction inlet.

[0015] A servo vertical plunger pump group includes the online cleanable rotary plunger pump head structure and servo drive assembly as described above, wherein the rotary plunger pump head is provided in several groups, the servo drive assembly is located on one side of the several groups of rotary plunger pump heads and a support seat is provided, and one end of the rotary plunger pump head is partially embedded in the support seat, and one end of the ceramic plunger of the several groups is connected to a male connector at one end, and the servo drive assembly is connected to the male connector via a female connector, so that the servo drive assembly drives the ceramic plunger to rotate and extend.

[0016] Preferably, the outer periphery of the upper end of the rotary plunger pump head is in a stepped structure.

[0017] Preferably, each end corner of the servo drive assembly is connected to a column, and the column is connected to a base plate at one end opposite to the servo drive assembly. Cylinders are connected to both ends of the base plate toward the servo drive assembly, and pressure plates are connected between the cylinder rods of the cylinders, and the pressure plates are in contact with several groups of the push heads.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] The utility model provides an online-cleanable rotary plunger pump head structure and a servo vertical plunger pump group. By providing a cleaning input port connected between the upper side of the pump head body and the ceramic plunger sleeve, and by providing a valve and a cleaning output port connected to the bottom, the measuring reagent that penetrates into the gap between the plunger and the plunger sleeve is effectively cleaned, which helps to avoid cross contamination and improve the accuracy of the measuring result. Since some measuring reagents will produce crystals after being deposited for a period of time, and the gap between the ceramic plunger and the plunger sleeve is very small, after long-term operation, the measuring reagents that penetrate into the gap will produce crystals and cause wear of the ceramic plunger and the plunger sleeve. Through the online cleaning function, the measuring reagents that penetrate into the gap can be effectively removed, and the generation of crystals can be reduced, thereby extending the service life of the pump and maintaining quantitative accuracy. By combining the servo drive component with the rotary plunger pump head structure, accurate control of the rotation and extension of the ceramic plunger is achieved, the working stability and reliability of the pump are improved, and the switching and delivery of different measuring reagents are convenient. By arranging a plurality of groups of rotary plunger pump heads and partially embedding them on the support seat, the effects of high metering accuracy, constant liquid flow and wide application range can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 This is a state diagram of the liquid suction position of the rotary plunger pump head of the utility model;

[0022] Figure 2 It is a schematic diagram of the liquid aspiration process of the rotary plunger pump head of the utility model;

[0023] Figure 3 It is a state diagram of the injection position of the rotary plunger pump head of the utility model;

[0024] Figure 4 It is a schematic diagram of the liquid injection process of the rotary plunger pump head of the utility model;

[0025] Figure 5 This is a state diagram of the cleaning mode of the rotary plunger pump head of the utility model;

[0026] Figure 6 This is a cross-sectional view of the rotary plunger pump head of the utility model

[0027] Figure 7 for Figure 6 A partial enlarged view of part A;

[0028] Figure 8 It is a stereoscopic diagram of the servo vertical plunger pump unit of the utility model.

[0029] In the figure: 1. Pump head body; 2. Ceramic plunger sleeve; 3. Ceramic plunger; 4. Suction inlet; 5. Push outlet; 6. Cleaning input port; 7. Cleaning output port; 8. Valve; 9. Cover body; 10. Valve seat; 11. Guide sleeve; 12. Connecting rod; 13. Plug; 14. Push head; 15. Guide seat; 16. Return spring; 17. Sealing ring; 18. Connector; 19. Notch; 20. Servo drive assembly; 21. Support seat; 22. Male connector; 23. Female connector; 24. Column; 25. Bottom plate; 26. Cylinder; 27. Pressure plate; 28. Pump body; 29. ​​Inner groove; 30. Rotary plunger pump head. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0033] Combine the following Figures 1 to 8 The utility model describes the structure of the online-cleanable rotary plunger pump head 30 and the servo vertical plunger pump set.

[0034] like Figures 1 to 8 As shown, the utility model provides a rotary plunger pump head 30 structure that can be cleaned online, including a pump head body 1, a ceramic plunger sleeve 2 arranged inside the pump head body 1, and a ceramic plunger 3 movably inserted into the ceramic plunger sleeve 2. A suction inlet 4 and a push outlet 5 connected to the ceramic plunger sleeve 2 are arranged in the middle of the pump head body 1. A cleaning input port 6 is connected to the ceramic plunger sleeve 2 on the upper side of the pump head body 1. A valve 8 is connected to the bottom of the pump head body 1, and a cleaning output port 7 is connected to one side of the valve 8. A cleaning input port 6 is connected to the ceramic plunger sleeve 2 on the upper side of the main body 1, and a valve 8 and a cleaning output port 7 are connected to the bottom, so that the measuring reagent that penetrates into the gap between the plunger and the plunger sleeve can be effectively cleaned, which helps to avoid cross contamination and improve the accuracy of the measurement results. A notch 19 is provided on the outer periphery of the ceramic plunger 3, and the notch 19 helps to suck the liquid from the liquid suction inlet 4. When the ceramic plunger 3 rotates to the liquid pushing outlet 5, the liquid in the ceramic plunger sleeve 2 can be discharged from the liquid pushing outlet 5 through the notch 19.

[0035] The metering pump is a plunger-type precision metering pump used for quantitative perfusion of chemical liquids and high-purity liquids. The cleaning of the metering pump is crucial to avoid cross contamination when perfusing chemical liquids and high-purity liquids. CIP and SIP technologies are required for efficient, environmentally friendly and safe cleaning and disinfection. CIP and SIP cleaning can effectively kill harmful microorganisms such as bacteria and viruses in the hose and reduce the risk of food contamination; CIP (cleaning in place) can be translated into local cleaning, in-situ cleaning, positioning cleaning, etc., usually referred to as cleaning. CIP systems are widely used for cleaning inside production equipment, such as inside pipes and cylinders; SIP (sanitizing in place) can be translated into local disinfection (sterilization), in-situ disinfection (sterilization), and positioning disinfection (sterilization). SIP systems are also widely used for disinfection or sterilization inside equipment, such as inside pipes and cylinders.

[0036] Working principle: Figure 1 The suction position state of the working mode shown is that the plunger notch rotates to the pump head inlet position; Figure 2 The suction process shown is that the plunger is lifted upward to suck the liquid into the pump chamber; Figure 3 The injection position shown is that the plunger notch is rotated to the pump head inlet position; Figure 4 The injection process shown is that the plunger is pushed downward to push the liquid out of the outlet; Figure 5 In the CIP mode shown, the ceramic plunger 3 is lifted to the highest position, the CIP inlet channel (cleaning input port 6) is connected to the liquid input and output interface in the ceramic plunger sleeve 2, and the lower CIP discharge is lifted by two cylinders to pneumatically open the valve. After the lower CIP discharge port (cleaning output port 7) is opened, the CIP liquid or steam will flow in from the upper CIP inlet (cleaning input port 6), and circulate and flush to the liquid suction inlet 4, liquid push outlet 5 and lower CIP discharge port (cleaning output port 7) of the liquid working part.

[0037] Preferably, the pump head main body 1 includes a pump body 28 and a cover body 9 covering the bottom of the pump body 28, the valve 8 includes a valve seat 10 penetrated through the cover body 9, the valve seat 10 is fixed to the bottom of the pump body 28 through the cover body 9, and a cleaning output port 7 connected to the valve 8 is opened on one side of the valve seat 10; by penetrating the valve seat 10 through the cover body 9 and fixing the cover body 9 to the bottom of the pump body 28, the stability and sealing of the entire pump head structure are enhanced, and this stable structure helps to prevent liquid leakage and ensure the normal operation of the pump; the cleaning output port 7 opened on one side of the valve seat 10 and connected to the valve 8 can effectively guide the flow of cleaning liquid, ensure that the cleaning liquid can be directly flushed into the valve 8 and the inside of the plunger pump, improve the cleaning efficiency, and reduce the accumulation of residues; the layout of the valve seat 10 and the cleaning output port 7 takes into account the principles of fluid dynamics, which helps to reduce the turbulence and dead corners of the fluid in the pump and improve the efficiency of cleaning and discharge.

[0038] Preferably, the valve 8 includes a guide sleeve 11 passed through the valve seat 10, a connecting rod 12 is movably passed through the middle of the guide sleeve 11, one end of the connecting rod 12 located at the pump body 28 is connected to a plug 13, and the other end of the connecting rod 12 is connected to a push head 14; through the design of the guide sleeve 11, the linear motion of the connecting rod 12 can be accurately guided to ensure the centering and stability of the plug 13 and the push head 14, and this precise control helps to improve the operating accuracy and reliability of the pump; the guide sleeve 11 provides stable support for the connecting rod 12, reduces the lateral force and bending stress of the connecting rod 12 during movement, thereby improving the mechanical properties and durability of the overall structure.

[0039] Preferably, a guide seat 15 is fixedly connected to the bottom of the valve seat 10, and the guide seat 15 is provided with an inner groove 29 for accommodating the push head 14, and enables the push head 14 to translate axially along the depth direction of the inner groove 29, and the connecting rod 12 is located between the push head 14 and the guide seat 15 and is penetrated by a return spring 16; the design of the guide seat 15 provides a stable support for the push head 14, and the addition of the return spring 16 enables the push head 14 to automatically return to the initial position after completing the pushing action, so as to prepare for the next opening of the valve 8, thereby improving the continuity and reliability of the valve 8.

[0040] Preferably, the plug 13 is of a conical structure, and the valve seat 10 has a conical groove structure corresponding to the plug 13, so that the plug 13 matches the valve seat 10, and the inner circumference of the conical groove is connected with a sealing ring 17; the plug 13 of the conical structure matches the conical groove structure of the valve seat 10, which can provide a better sealing effect and reduce the risk of liquid leakage. The conical structure helps to achieve surface sealing, and is more adaptable to pressure changes and slight deformations than simple plane sealing; the conical structure has the ability of self-alignment, and when the plug 13 matches the valve seat 10, it can automatically adjust to the best sealing position, reducing the precision requirements during installation and improving the fault tolerance of operation.

[0041] Preferably, the liquid suction inlet 4 , the liquid pushing outlet 5 , the cleaning input port 6 and the cleaning output port 7 are all connected with a connector 18 .

[0042] Preferably, the height of the notch 19 is greater than or equal to the height of the liquid suction inlet 4 .

[0043] The servo vertical plunger pump group includes the above-mentioned online cleanable rotary plunger pump head 30 structure and servo drive assembly 20. The rotary plunger pump head 30 is provided with several groups. The servo drive assembly 20 is located on one side of the several groups of rotary plunger pump heads 30 and is provided with a support seat 21, and one end of the rotary plunger pump head 30 is partially embedded in the support seat 21. The outer ends of the several groups of ceramic plungers 3 are connected with male connectors 22. The servo drive assembly 20 is connected to the male connector 22 through the female connector 23, so that the servo drive assembly 20 drives the ceramic plungers 3 to rotate and extend. The servo drive assembly 20 can realize precise control of the rotation and extension of the ceramic plungers 3; the structural design of the online cleanable rotary plunger pump head 30 makes maintenance and cleaning more convenient, and the cleaning process can be completed without stopping the machine, thereby maintaining the efficient and continuous operation of the pump.

[0044] Preferably, the outer periphery of the upper end of the rotary plunger pump head 30 is in a stepped structure.

[0045] Preferably, each end corner of the servo drive assembly 20 is connected to a column 24, and the column 24 is connected to a base plate 25 at one end opposite to the servo drive assembly 20. The two ends of the base plate 25 are connected to a cylinder 26 facing the servo drive assembly 20, and a pressure plate 27 is connected between the cylinder 26 rods of the cylinder 26, and the pressure plates 27 are in contact with several groups of push heads 14.

[0046] The utility model provides a rotary plunger pump head 30 structure capable of online cleaning and a servo vertical plunger pump unit. By providing a cleaning input port 6 connected between the upper side of the pump head body 1 and the ceramic plunger sleeve 2, and a valve 8 and a cleaning output port 7 connected to the bottom, the measuring reagent that penetrates into the gap between the plunger and the plunger sleeve can be effectively cleaned, which helps to avoid cross contamination and improve the accuracy of the measuring result. Since some measuring reagents will crystallize after being deposited for a period of time, and the gap between the ceramic plunger 3 and the plunger sleeve is very small, after long-term operation, the measuring reagents that penetrate into the gap will crystallize and cause The wear of the ceramic plunger 3 and the plunger sleeve can be effectively removed through the online cleaning function, and the measurement reagents that penetrate into the gap can be reduced, thereby reducing the generation of crystals, thereby extending the service life of the pump and maintaining quantitative accuracy; by combining the servo drive component 20 with the rotary plunger pump head 30 structure, precise control of the rotation and extension of the ceramic plunger 3 is achieved, the working stability and reliability of the pump are improved, and the switching and transportation of different measurement reagents are convenient; by setting up a plurality of groups of rotary plunger pump heads 30 and making them partially embedded in the support seat 21, the effects of high metering accuracy, constant liquid flow and a wide range of applications can be achieved.

[0047] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A rotary plunger pump head structure that can be cleaned online, comprising a pump head body, a ceramic plunger sleeve disposed inside the pump head body, and a ceramic plunger movably disposed in the ceramic plunger sleeve, characterized in that: A liquid suction inlet and a liquid pushing outlet connected to the ceramic plunger sleeve are provided in the middle of the pump head body, a cleaning input port is connected to the ceramic plunger sleeve on the upper side of one side of the pump head body, a valve is connected to the bottom of the pump head body, and a cleaning output port is connected to one side of the valve, and a notch is provided on the outer periphery of the ceramic plunger.

2. The online cleanable rotary plunger pump head structure according to claim 1, characterized in that: The pump head main body includes a pump body and a cover body covered on the bottom of the pump body, the valve includes a valve seat penetrated through the cover body, the valve seat is fixed to the bottom of the pump body through the cover body, and a cleaning output port connected to the valve is opened on one side of the valve seat.

3. The online cleanable rotary plunger pump head structure according to claim 2, characterized in that: The valve comprises a guide sleeve penetrating the valve seat, a connecting rod is movably penetrating the middle of the guide sleeve, one end of the connecting rod located at the pump body is connected to a plug, and the other end of the connecting rod is connected to a push head.

4. The online cleanable rotary plunger pump head structure according to claim 3, characterized in that: The bottom of the valve seat is fixedly connected with a guide seat, the guide seat is provided with an inner groove for accommodating a push head, and enables the push head to translate axially along the depth direction of the inner groove, and the connecting rod is located between the push head and the guide seat and is provided with a return spring.

5. The online cleanable rotary plunger pump head structure according to claim 3, characterized in that: The plug has a conical structure, and the valve seat has a conical groove structure corresponding to the plug, so that the plug matches the valve seat, and a sealing ring is connected to the inner periphery of the conical groove.

6. The online cleanable rotary plunger pump head structure according to claim 1, characterized in that: The liquid suction inlet, the liquid pushing outlet, the cleaning input port and the cleaning output port are all connected with joints.

7. The online cleanable rotary plunger pump head structure according to claim 1, characterized in that: The height of the notch is greater than or equal to the height of the liquid suction inlet.

8. Servo vertical piston pump unit, characterized in that: It comprises the online cleanable rotary plunger pump head structure and servo drive assembly as described in claim 3, wherein the rotary plunger pump head is provided in several groups, the servo drive assembly is located on one side of the several groups of rotary plunger pump heads and a support seat is provided, and one end of the rotary plunger pump head is partially embedded in the support seat, the outer ends of the several groups of ceramic plungers are connected with male connectors, and the servo drive assembly is connected to the male connectors through female connectors respectively, so that the servo drive assembly drives the ceramic plungers to rotate and extend.

9. The servo vertical piston pump unit according to claim 8, characterized in that: The outer periphery of the upper end of the rotary plunger pump head is in a stepped structure.

10. The servo vertical piston pump unit according to claim 8, characterized in that: Each end corner of the servo drive assembly is connected to a column, and the column is connected to a base plate at one end opposite to the servo drive assembly. Cylinders are connected to both ends of the base plate toward the servo drive assembly, and pressure plates are connected between the cylinder rods of the cylinders, and the pressure plates are in contact with several groups of push heads.

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