Perfluoropolyether high-precision metering and conveying device
By using a constant-power heating cable and a temperature controller to maintain a constant temperature in the perfluoropolyether conveying device, combined with a dustproof cover for protection, the problems of temperature control defects and insufficient protection in traditional devices are solved, and efficient and stable perfluoropolyether conveying is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-30
- Publication Date
- 2026-04-07
AI Technical Summary
Existing high-precision metering and conveying devices have temperature control defects and insufficient protection during the conveying of perfluoropolyether, resulting in large flow fluctuations, easy blockage and local overheating, which affect the conveying stability and system reliability.
It uses components such as constant power heating tape, lead-out tape, connector and temperature controller to maintain the constant temperature of perfluoropolyether, and provides protection through components such as dust cover to prevent mechanical damage and dust accumulation.
It achieves efficient delivery of perfluoropolyether, prevents blockage and local overheating, and improves delivery stability and system reliability.
Smart Images
Figure CN224094268U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of perfluoropolyether technology, specifically a high-precision metering and conveying device for perfluoropolyether. Background Technology
[0002] Perfluoropolyethers are a class of perfluorinated linear or branched polymers composed of carbon, oxygen, and fluorine atoms, with the general molecular formula Rf-[OCF(CF3)CF2]n-[OCF2]m-ORf, where Rf is a perfluoroalkyl group. A high-precision metering and conveying device for perfluoropolyethers is a precision equipment system specifically designed for handling high-purity, highly corrosive perfluoropolyether fluids.
[0003] Existing high-precision metering and conveying devices for conveying perfluoropolyether suffer from two major problems in traditional solutions: temperature control deficiencies and insufficient protection.
[0004] Due to the lack of precise temperature control, the viscosity of perfluoropolyether increases dramatically at room temperature, causing flow fluctuations to exceed ±5%. Furthermore, traditional heating methods are slow to respond and are prone to causing localized overheating. At the same time, exposed constant-power heating cables are susceptible to mechanical damage and dust accumulation, leading to reduced heat dissipation efficiency. Metal dust can also catalyze the decomposition of perfluoropolyether, seriously affecting the stability of the conveying process and the reliability of the system. Utility Model Content
[0005] The purpose of this invention is to provide a high-precision metering and conveying device for perfluoropolyether. This invention utilizes components such as a constant-power heating tape, an outlet tape, a connector, and a temperature controller to maintain a constant temperature during perfluoropolyether conveying, thereby improving its efficiency and preventing blockages during conveying at room temperature. Furthermore, the combination of the constant-power heating tape and the temperature controller prevents localized overheating, thus addressing the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A high-precision metering and conveying device for perfluoropolyether includes a servo motor driven plunger pump. One end of the servo motor driven plunger pump is threaded with a suction tube, and the other end of the servo motor driven plunger pump is threaded with a conveying tube. One end of the conveying tube is equipped with a flow control valve for perfluoropolyether flow control, and one end of the flow control valve is threaded with a discharge tube. The bottom of the flow control valve is fixed with a mounting base.
[0008] The servo motor drives the plunger pump, suction pipe, delivery pipe, flow control valve, and discharge pipe, which are controlled by an external power supply control terminal to achieve high-precision metering and delivery of perfluoropolyether and flow control and discharge of perfluoropolyether.
[0009] The outside of the delivery pipe is equipped with a constant temperature heating component for conveying perfluoropolyether under constant temperature conditions.
[0010] A protective component is installed above the delivery pipe to cover and protect the constant temperature heating component.
[0011] Preferably, the constant temperature heating assembly includes a constant power heating cable, an outlet tape, a connector, and a temperature controller. The constant power heating cable is wrapped around the outside of the delivery pipe. One end of the constant power heating cable is fixed with an outlet tape, and one end of the outlet tape is fixed with a connector. One end of the connector is snapped into the socket provided on the back of the temperature controller.
[0012] Preferably, the temperature controller is fixedly mounted on a mounting bracket fixed at one end of the front of the servo motor driven plunger pump housing. A retainer is installed at the top end of the mounting bracket, and the inner side of the retainer is engaged with one side of the temperature controller.
[0013] Preferably, the protective assembly includes a dust cover, a column groove seat, a positioning seat, a fixing plate, a fixing groove seat, and a limiting plate. The top end of the dust cover is fixed with two sets of symmetrical fixing plates, which are snapped into the inside of the fixing groove seat. The fixing groove seat is fixedly installed on the top end of the servo motor driven plunger pump housing. The bottom end of the dust cover is equipped with a positioning seat for pressing the constant power heating cable. The top end of the flow control valve is fixedly equipped with two sets of symmetrical limiting plates, and the inner side of the limiting plate is attached to one end of the dust cover.
[0014] Preferably, the protective component further includes a column groove and a locking post. The column groove is installed at one end of the bottom of the dust cover, and a positioning seat is fixedly installed at the bottom of the locking post. The locking post for disassembling and replacing the positioning seat is engaged inside the locking groove.
[0015] Preferably, the dust cover has an opening on the front side near the connector for the connector to pass through.
[0016] Compared with the prior art, the beneficial effects of this utility model are:
[0017] This utility model uses a combination of components such as a constant power heating cable, an outlet belt, a connector, and a temperature controller to facilitate the transport of perfluoropolyether at a constant temperature, thereby improving the efficiency of perfluoropolyether and preventing blockages during transport at room temperature. At the same time, the combination of the constant power heating cable and the temperature controller prevents local overheating.
[0018] This utility model uses a combination of components such as a dust cover, column groove seat, positioning seat, fixing plate, fixing groove seat, and limiting plate to effectively cover and protect the constant power heating cable from dust, thereby reducing the impact of external objects. At the same time, it also facilitates the disassembly, opening, and replacement of the dust cover. Furthermore, the bottom of the dust cover is designed with a U-shaped opening, so as not to affect the heat dissipation of the constant power heating cable. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structure of this utility model;
[0020] Figure 2 This is a schematic diagram of the explosion separation structure of this utility model;
[0021] Figure 3 for Figure 2 Rear view structural diagram;
[0022] Figure 4 This is an enlarged structural schematic diagram of the dustproof cover of this utility model.
[0023] In the diagram: 1. Servo motor driven plunger pump; 101. Suction pipe; 102. Delivery pipe; 2. Mounting base; 3. Flow control valve; 4. Discharge pipe; 5. Constant power heating tape; 6. Lead-out tape; 7. Connector; 8. Temperature controller; 9. Mounting bracket; 10. Card holder; 11. Dustproof cover; 12. Column groove seat; 13. Positioning seat; 14. Carding column; 15. Opening; 16. Fixing plate; 17. Fixing groove seat; 18. Limiting plate. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] Please see Figures 1-4 This utility model provides a technical solution:
[0026] A high-precision metering and conveying device for perfluoropolyether includes a servo motor driven plunger pump 1. One end of the servo motor driven plunger pump 1 is threaded with a suction pipe 101, and the other end of the servo motor driven plunger pump 1 is threaded with a conveying pipe 102. One end of the conveying pipe 102 is equipped with a flow control valve 3 for perfluoropolyether flow control, and one end of the flow control valve 3 is threaded with a discharge pipe 4. The bottom of the flow control valve 3 is fixed with a mounting base 2, thereby facilitating the installation of the flow control valve 3.
[0027] The servo motor drives the plunger pump 1, suction pipe 101, delivery pipe 102, flow control valve 3 and discharge pipe 4, which are controlled by an external power supply control terminal to achieve high-precision metering and delivery of perfluoropolyether and flow control and discharge of perfluoropolyether.
[0028] The servo motor-driven plunger pump 1 is a Kollmorgen AKM series, with a power of 0.5–3 kW and a speed of 3000 rpm. The servo motor-driven plunger pump 1 is powered by an external power supply control terminal, driving the plunger pump to move precisely, drawing perfluoropolyether from the suction pipe 101 and pushing it through the delivery pipe 102 to the flow control valve 3. The servo motor adjusts the plunger pump's stroke and frequency according to set parameters, coordinating with the real-time adjustment of the flow control valve 3 to achieve high-precision metering and flow control of the perfluoropolyether. Finally, the required flow rate of the medium is stably output through the discharge pipe 4, thus achieving the effect of metered delivery of perfluoropolyether.
[0029] The flow control valve 3 is model Bürger 8644. It has a pressure rating of 40 bar and a leakage rate of <0.01%FS.
[0030] The outside of the delivery pipe 102 is equipped with a constant temperature heating component for conveying perfluoropolyether under constant temperature conditions; the constant temperature heating component includes a constant power heating cable 5, an outlet tape 6, a connector 7 and a temperature controller 8. The constant power heating cable 5 is wrapped around the outside of the delivery pipe 102. One end of the constant power heating cable 5 is fixed with the outlet tape 6, and one end of the outlet tape 6 is fixed with the connector 7. One end of the connector 7 is snapped into the socket provided on the back of the temperature controller 8.
[0031] This utility model uses components such as a constant power heating cable 5, an outlet cable 6, a connector 7, and a temperature controller 8 to work together, thereby facilitating the transport of perfluoropolyether at a constant temperature, improving the efficiency of perfluoropolyether, and preventing blockage during transport at room temperature. At the same time, the use of the constant power heating cable 5 and the temperature controller 8 together will not cause local overheating.
[0032] Furthermore, the temperature controller 8 and the constant power heating cable 5 are powered by an external power supply terminal. Then, the temperature controller 8 is operated to control the temperature of the constant power heating cable 5 so that the constant power heating cable 5 can maintain a constant temperature for the perfluoropolyether transported in the delivery pipe 102. This helps to prevent the perfluoropolyether from having excessively high viscosity at room temperature during transportation, thereby improving the efficiency of perfluoropolyether transportation.
[0033] The constant power heating cable model 5 is the BARTEC BCS series. It is ATEX / IECEx certified (Zone 1 explosion-proof); self-limiting temperature is optional (to avoid the risk of overheating).
[0034] The temperature controller 8 is an Omron E5CC-QX series. It has a control accuracy of ±0.1℃ and supports PID self-tuning.
[0035] The core principle of the constant power heating cable 5 working in conjunction with the temperature controller 8 is as follows: a stable heat output is continuously provided by an alloy heating wire (such as nickel-chromium alloy) with constant resistance characteristics. The pipe temperature is monitored in real time by a high-precision RTD / Pt100 sensor. The temperature controller 8 dynamically adjusts the on / off ratio of the heating cable (duty cycle 0-100%) based on a PID algorithm to control the temperature fluctuation of the perfluoropolyether delivery pipe 102 within ±0.5℃. At the same time, the built-in current transformer will detect the insulation degradation of the constant power heating cable 5 (triggering an alarm when leakage current >10mA), forming a closed-loop system of "heating-feedback-protection".
[0036] A protective component is provided above the delivery pipe 102 to cover and protect the constant temperature heating component.
[0037] The protective assembly includes a dust cover 11, a column groove seat 12, a positioning seat 13, a fixing plate 16, a fixing groove seat 17, and a limiting plate 18. Two sets of symmetrical fixing plates 16 are fixed to one end of the top of the dust cover 11. The fixing plates 16 are snapped into the inside of the fixing groove seat 17, and the fixing groove seat 17 is fixedly installed on the top end of the housing of the servo motor driven plunger pump 1. A positioning seat 13 for pressing the constant power heating tape 5 is installed at one end of the bottom of the dust cover 11. Two sets of symmetrical limiting plates 18 are fixedly installed at one end of the top of the flow control valve 3, and the inner side of the limiting plate 18 is attached to one end of the dust cover 11.
[0038] The protective assembly also includes a groove and a locking post 14. The groove is installed at one end of the bottom of the dust cover 11. A positioning seat 13 is fixedly installed at the bottom of the locking post 14. The locking post 14 for disassembling and replacing the positioning seat 13 is engaged inside the groove.
[0039] The dust cover 11 has an opening 15 on the front end near the connector 7 for the connector 7 to pass through.
[0040] This utility model uses a combination of components such as a dust cover 11, a column groove seat 12, a positioning seat 13, a fixing plate 16, a fixing groove seat 17, and a limiting plate 18 to effectively cover and protect the constant power heating cable 5 from dust, thereby reducing the impact of external objects on it. At the same time, it also facilitates the disassembly, opening, and replacement of the dust cover 11. Furthermore, the bottom of the dust cover 11 is designed with a U-shaped opening 15, so as not to affect the heat dissipation of the constant power.
[0041] Furthermore, by hand, the positioning seat 13 is picked up and its top locking pin 14 is inserted into the pin groove to fix the positioning seat 13. Then, the dust cover 11 is picked up and its top fixing plate 16 is inserted into the fixing groove 17 at the top of the servo motor driven plunger pump 1 housing. At the same time, its other end is pressed against the side of the flow control valve 3 housing and limited by the limiting plate 18 on its top to prevent it from moving back and forth. The reverse operation can remove the dust cover 11.
[0042] The temperature controller 8 is fixedly mounted on a mounting bracket 9 fixed at one end of the front of the servo motor driven plunger pump 1 housing. A retainer 10 is mounted on the top end of the mounting bracket 9, and the inner side of the retainer 10 is locked to one side of the temperature controller 8.
[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A high-precision metering and conveying device for perfluoropolyether, comprising a servo motor-driven plunger pump (1), characterized in that: The servo motor drives the plunger pump (1) with a suction pipe (101) threaded on one end and a delivery pipe (102) threaded on the other end. A flow control valve (3) for perfluoropolyether flow control is installed on one end of the delivery pipe (102), and a discharge pipe (4) is threaded on one end of the flow control valve (3). A mounting base (2) is fixed at the bottom of the flow control valve (3). The servo motor drives the plunger pump (1), suction pipe (101), delivery pipe (102), flow control valve (3) and discharge pipe (4) through external power supply control terminal to achieve high-precision metering and delivery of perfluoropolyether and flow control and discharge of perfluoropolyether; The outside of the delivery pipe (102) is equipped with a constant temperature heating component for conveying perfluoropolyether under constant temperature conditions; A protective component is provided above the delivery pipe (102) to cover and protect the constant temperature heating component.
2. The perfluoropolyether high-precision metering and conveying device according to claim 1, characterized in that: The constant temperature heating assembly includes a constant power heating cable (5), an outlet tape (6), a connector (7), and a thermostat (8). The constant power heating cable (5) is wrapped around the outside of the delivery pipe (102). One end of the constant power heating cable (5) is fixed with an outlet tape (6), and one end of the outlet tape (6) is fixed with a connector (7). One end of the connector (7) is snapped into the socket provided on the back of the thermostat (8).
3. The perfluoropolyether high-precision metering and conveying device according to claim 2, characterized in that: The temperature controller (8) is fixedly installed on a mounting bracket (9) fixed at one end of the front of the servo motor driven plunger pump (1). A card holder (10) is installed at the top end of the mounting bracket (9), and the inner side of the card holder (10) is locked to one side of the temperature controller (8).
4. The perfluoropolyether high-precision metering and conveying device according to claim 1, characterized in that: The protective assembly includes a dust cover (11), a column groove seat (12), a positioning seat (13), a fixing plate (16), a fixing groove seat (17), and a limiting plate (18). The top end of the dust cover (11) is fixed with two sets of symmetrical fixing plates (16). The fixing plates (16) are snapped into the inside of the fixing groove seat (17), and the fixing groove seat (17) is fixedly installed on the top end of the housing of the servo motor driven plunger pump (1). The bottom end of the dust cover (11) is equipped with a positioning seat (13) for pressing the constant power heating tape (5). The top end of the flow control valve (3) is fixedly equipped with two sets of symmetrical limiting plates (18), and the inner side of the limiting plate (18) is attached to one end of the dust cover (11).
5. The perfluoropolyether high-precision metering and conveying device according to claim 4, characterized in that: The protective assembly also includes a groove and a locking post (14). The groove is installed at one end of the bottom of the dust cover (11). A positioning seat (13) is fixedly installed at the bottom of the locking post (14). The locking post (14) is engaged inside the groove for disassembling and replacing the positioning seat (13).
6. The perfluoropolyether high-precision metering and conveying device according to claim 4, characterized in that: The dust cover (11) has an opening (15) on the front end near the connector (7) for the connector (7) to pass through.