CN218826544U

CN218826544U - Vacuum quantitative liquid filling device for thermal bulb probe system

Info

Publication number: CN218826544U
Application number: CN202223074433.0U
Authority: CN
Inventors: 李宏志; 林琦; 付宗雨
Original assignee: Xinjiang Teba Electric Group Co ltd
Current assignee: Xinjiang Teba Electric Group Co ltd
Priority date: 2022-11-21
Filing date: 2022-11-21
Publication date: 2023-04-07
Anticipated expiration: 2032-11-21

Abstract

The utility model relates to the technical field of transformer temperature controllers, in particular to a vacuum quantitative liquid filling device for a thermometer bulb probe system, which comprises an oil tank, a switch valve A, a quantitative oil cup component, a check valve and a vacuum pump, wherein the oil tank is communicated with an oil filling port of a thermometer bulb probe body through a pipeline; the input end of the quantitative oil cup component is communicated with the oil outlet of the connecting cylinder body through a pipeline, the output end of the quantitative oil cup component is communicated with the input end of the check valve through a pipeline, and the output end of the check valve is communicated with the air exhaust end of the vacuum pump. The utility model adopts the mode of vacuum pumping liquid injection, thereby greatly avoiding two defects of a large amount of bubbles and difficult elimination of the bubbles generated during positive pressure liquid injection, and being capable of stably realizing one-time liquid injection success; fundamentally has solved and has had bubble production in the notes liquid process, influences the instruction precision to the defect of doing over again and repairing of many times that leads to.

Description

Vacuum quantitative liquid filling device for thermal bulb probe system

Technical Field

The utility model belongs to the technical field of transformer temperature controller technique and specifically relates to a vacuum ration topping-up device for temperature bulb probe system.

Background

With the development of oil-immersed transformers in China, temperature controllers for monitoring the temperature of transformers are becoming mature day by day. The existing transformer temperature controllers at home and abroad in the market mainly use an expansion type temperature controller, and the main core component of the temperature controller is a temperature bulb probe system consisting of a temperature bulb probe body and a connecting cylinder body in which an elastic element (such as a corrugated pipe) is arranged. Liquid (such as heat conduction oil) in the thermometer bulb probe is heated and expanded and is conducted into the connecting cylinder body, an elastic element in the connecting cylinder body is made to generate displacement, and the elastic element mechanically pushes the gauge outfit pointer to rotate through a push rod and other structures so as to indicate temperature.

Therefore, the liquid injection of the thermometer bulb probe system is very important, and the accurate indication precision of the temperature controller can be ensured only when the liquid injection is required quantitatively without bubbles in the thermometer bulb probe system. In the prior art, a positive pressure liquid injection mode is adopted, nitrogen pressurization is carried out, the defect that nitrogen and liquid are fused exists, the defect that bubbles and bubbles are not easy to discharge are generated in the liquid injection process, the indication precision cannot be guaranteed, the rework rate of repair is high, the working efficiency is low, resources are wasted, and the like.

SUMMERY OF THE UTILITY MODEL

Adopt malleation notes liquid mode to produce easily bubble, the difficult exhaust defect of bubble to current thermal bulb probe system, and then influence the problem of instructing the precision, the utility model aims to provide a vacuum ration topping up device for thermal bulb probe system.

The purpose of the utility model is realized through the following technical scheme:

a vacuum quantitative liquid filling device for a thermal bulb probe system comprises an oil tank, a switch valve A, a quantitative oil cup assembly, a check valve and a vacuum pump, wherein the oil tank is communicated with an oil filling port of a thermal bulb probe body through a pipeline;

the input end of the quantitative oil cup assembly is communicated with the oil outlet of the connecting cylinder through a pipeline, the output end of the quantitative oil cup assembly is communicated with the input end of the check valve through a pipeline, and the output end of the check valve is communicated with the air exhaust end of the vacuum pump.

And a vacuum meter is arranged on a pipeline communicated between the output end of the quantitative oil cup assembly and the input end of the check valve.

The quantitative oil cup component comprises an oil cup A, an oil cup B, a switch valve B and a corrugated pipe;

the input end of the oil cup A is used as the input end of a quantitative oil cup assembly and is communicated with an oil outlet of the connecting cylinder body through a pipeline, the output end of the oil cup B is used as the output end of the quantitative oil cup assembly and is communicated with the input end of the check valve through a pipeline, the input end of the oil cup B is communicated with the output end of the oil cup A through a pipeline, and the switch valve B is arranged on the pipeline communicated between the input end of the oil cup B and the output end of the oil cup A;

one end of the corrugated pipe is open, the other end of the corrugated pipe is closed, one end of the corrugated pipe is installed on the oil cup A, and the other end of the corrugated pipe extends into the inner side cavity of the oil cup A.

The quantitative oil cup assembly further comprises a pressurizing screw, and one end of the pressurizing screw props against the bottom surface of the corrugated pipe from the inner side of the corrugated pipe.

The pressurizing screw is in threaded connection with the pressurizing screw mounting seat and can form self-locking.

The pressurizing screw rod mounting seat is connected with the outer side face of the oil cup A.

The oil cup B is made of transparent materials.

And the pipeline communicated between the switch valve A and the oil filling port of the thermometer bulb probe body and the pipeline communicated between the input end of the quantitative oil cup assembly and the oil outlet of the connecting cylinder body are made of copper tubes.

The utility model discloses an advantage does with positive effect:

1. the utility model adopts the mode of vacuum pumping liquid injection, thereby greatly avoiding two defects of a large amount of bubbles and difficult elimination of the bubbles generated during positive pressure liquid injection, and being capable of stably realizing one-time liquid injection success; fundamentally has solved and has had bubble production in the notes liquid process, influences the instruction precision to the defect of doing over again and repairing of many times that leads to.

2. After vacuum liquid injection, the liquid injection amount of a thermometer bulb probe system is generally adjusted according to requirements, and a control method is worked out through calculation of parameters such as the density, the temperature, the volume, the expansion rate and the like of liquid injection liquid to carry out quantitative proportioning liquid injection; the indication accuracy of the temperature controller is directly influenced by the injection amount of the temperature bulb probe system, and secondary inflection point adjustment is usually required during meter adjustment to ensure the indication accuracy of the temperature controller; and the utility model discloses a setting of ration oil cup subassembly can carry out the ration and annotate the liquid, can save the time of secondary adjustment, improves work efficiency and product quality.

3. The utility model discloses a setting of vacuum gauge can also test under vacuum state thermal bulb probe system whether there is the leak source, can test whole thermal bulb probe system's sealing quality, reduces the probability of seepage, guarantees thermal bulb probe system's permanent stable work.

4. The utility model discloses a vacuum quantitative priming device is succinct practical, easy operation, and the cost of manufacture is low.

Drawings

FIG. 1 is a schematic structural view of a thermometer bulb probe system after liquid injection is completed by using the utility model;

FIG. 2 is a schematic view of the internal structure of a connecting cylinder of a conventional bulb probe system;

FIG. 3 is a schematic view of the overall connection structure of the present invention;

fig. 4 is a schematic structural diagram of the quantitative oil cup assembly of the present invention.

In the figure: 1 is an oil tank, 2 is a switch valve A, 3 is a quantitative oil cup component, 301 is an oil cup A, 302 is an oil cup B, 303 is a switch valve B, 304 is a pressurizing screw, 305 is a corrugated pipe, 306 is a pressurizing screw mounting seat, 4 is a check valve, 5 is a vacuum pump, and 6 is a vacuum meter;

001 is the bulb probe system, 0011 is the bulb probe body, 0012 is the connecting cylinder, 0013 is the elastic element, 0014 is the bulb probe system oil conduit, 002 is the closed cut-off point.

Detailed Description

The present invention will be described in further detail with reference to the accompanying fig. 1-4.

The utility model discloses the bulb probe system 001 of current transformer temperature controller that is suitable for, as shown in fig. 1 and fig. 2, including bulb probe body 0011, connecting barrel 0012 and elastic element 0013. The bulb probe body 0011 is a tubular part with a space A for containing heat conduction oil inside, and an oil injection port and an oil outlet which are respectively communicated with the space A are formed in the bulb probe body 0011. Elastic element 0013 is installed in the inside of connecting barrel 0012, and elastic element 0013 is used for through the gauge outfit pointer rotation of push rod isotructure machinery promotion transformer temperature controller, the instruction temperature, elastic element 0013 and connecting barrel 0012 set up the structure and be prior art. A space B for containing heat conduction oil is formed between the elastic element 0013 and the connecting cylinder 0012, and an oil inlet and an oil outlet which are communicated with the space B are respectively formed in the connecting cylinder 0012. The oil inlet of the connecting cylinder body 0012 is communicated with the oil outlet of the thermometer bulb probe body 0011 through a thermometer bulb probe system oil guide pipe 0014, and the thermometer bulb probe system oil guide pipe 0014 generally adopts a red copper pipe.

The vacuum quantitative liquid filling device for the thermal bulb probe system in the embodiment is shown in fig. 3, and comprises an oil tank 1, a switch valve A2, a quantitative oil cup assembly 3, a check valve 4 and a vacuum pump 5. The oil tank 1 is communicated with the oil filling port of the thermometer bulb probe body 0011 through a pipeline, and the switch valve A2 is installed on the pipeline communicated between the oil tank 1 and the oil filling port of the thermometer bulb probe body 0011. In this embodiment, the switch valve A2 is a commercially available needle valve for controlling the opening and closing of a pipe communicating between the oil tank 1 and the oil filling port of the bulb probe body 0011. The oil tank 1 is used for containing heat conduction oil.

The input end of the quantitative oil cup component 3 is communicated with an oil outlet of the connecting cylinder 0012 through a pipeline, the output end of the quantitative oil cup component 3 is communicated with the input end of the check valve 4 through a pipeline, and the output end of the check valve 4 is communicated with the air exhaust end of the vacuum pump 5. Vacuum pump 5 is the rotary-vane vacuum pump of market in this embodiment, and vacuum pump 5 is by external controller control action, mainly plays the effect to bulb probe system 001 evacuation, guarantees that the vacuum is good. The check valve 4 in the embodiment adopts a check valve product in the prior art; the check valve 4 is provided to ensure good sealing performance and prevent the liquid from flowing back to the vacuum pump 5.

The pipeline that is linked together between the oil filler point of switch valve A2 and bulb probe body 0011 and the pipeline that is linked together between the input of ration oil cup subassembly 3 and the oil-out of connecting cylinder body 0012 all adopt copper tubing, and the heat conduction is good, and is convenient for cut and weld to die sealed. After the liquid filling of the thermal bulb probe system 001 is completed, the pipeline communicated between the switch valve A2 and the oil filling port of the thermal bulb probe body 0011 and the pipeline communicated between the input end of the quantitative oil cup component 3 and the oil outlet of the connecting cylinder 0012 are respectively cut off and welded to be sealed, so that the sealed thermal bulb probe system 001 as shown in fig. 1 is completed, and the sealed cut-off point 002 is formed by sealing the two pipelines. When the above-mentioned pipeline is cut off and welded to be sealed, attention should be paid to avoid the communication of the bulb probe system 001 with the outside air.

Specifically, in the present embodiment, a vacuum gauge 6 is disposed on a pipe communicating between the output end of the quantitative oil cup assembly 3 and the input end of the check valve 4. In this embodiment, a commercially available stainless steel vacuum gauge of-0.1 to 0MPa standard, which is used as the vacuum gauge 6, is mainly used to observe the change of the vacuum degree of the bulb probe system 001 and to detect whether the bulb probe system 001 leaks.

Specifically, as shown in fig. 4, the quantitative oil cup assembly 3 of the present embodiment includes an oil cup a301, an oil cup B302, an on-off valve B303, a pressure screw 304, and a bellows 305.

The input end of the oil cup A301 serves as the input end of the quantitative oil cup assembly 3 and is communicated with an oil outlet of the connecting cylinder body 0012 through a pipeline, the output end of the oil cup B302 serves as the output end of the quantitative oil cup assembly 3 and is communicated with the input end of the check valve 4 through a pipeline, the input end of the oil cup B302 is communicated with the output end of the oil cup A301 through a pipeline, and the switch valve B303 is installed on the pipeline communicated between the input end of the oil cup B302 and the output end of the oil cup A301. In this embodiment, the switch valve B303 is a commercially available needle valve, and is configured to control opening and closing of a pipe that communicates between an input end of the oil cup B302 and an output end of the oil cup a 301.

One end of the bellows 305 is open and the other end is closed, and one end of the bellows 305 is mounted on the oil cup a301 and the other end extends into the inner cavity of the oil cup a 301. The outer peripheral surface of the corrugated pipe 305 and the inner wall of the oil cup a301 enclose a space C for accommodating the heat transfer oil. One end of the pressure screw 304 abuts against the bottom surface of the bellows 305 from the inside of the bellows 305, and the pressure screw 304 is screwed to the pressure screw mounting seat 306 and can be self-locked. The pressure screw mount 306 is connected to the outer surface of the oil cup a301 by screws, and maintains a fixed position relative to the oil cup a 301. The bellows 305 can be pushed by rotating the pressurizing screw 304 to stretch towards the inner side of the oil cup a301, so as to extrude the heat conducting oil in the space C inside the oil cup a301 to enter the space B. The volume of the heat transfer oil extruded into the space B is a product of the cross-sectional area of the bellows 305 and the length of the bellows (i.e., the distance the pressurizing screw 304 is screwed), and the influence of the wrinkles of the outer circumferential surface of the bellows 305 is negligible, so that the liquid can be quantitatively filled.

Specifically, in this embodiment, the oil cup B302 is made of a transparent material, or is provided with an observation window, so as to facilitate observation of the oil level. The oil cup A301 can also be made of transparent materials or provided with an observation window. The connection structure of each pipeline in this embodiment is the prior art.

The working principle is as follows:

when in use, the vacuum quantitative liquid filling device is firstly connected with the thermometer bulb probe system 001 as shown in the state of figure 3; after the switch valve A2 and the switch valve B303 are opened, the vacuum pump 5 is controlled to be started to vacuumize the thermometer bulb probe system 001, and heat conduction oil sequentially enters a space A of the thermometer bulb probe body 0011, a space B formed between the elastic element 0013 and the connecting cylinder 0012 and a space C of the oil cup A301 from the oil tank 1 under the action of negative pressure; after oil liquid enters the oil cup B302, the thermal bulb probe system 001 and the oil cup A301 are indicated to be filled with heat conduction oil, and at the moment, the vacuum pump 5, the switch valve A2 and the switch valve B303 are closed; then, the pressurizing screw 304 is screwed into the inner side of the corrugated pipe 305 for a specified distance according to a preset requirement, the corrugated pipe 305 can be pushed to stretch for a specified length towards the inner side of the oil cup A301, the heat conduction oil in the oil cup A301 is extruded to enter the space B, quantitative liquid filling is realized, at the moment, the elastic element 0013 contracts for a specified distance under the extrusion of the quantitatively filled heat conduction oil, and then the adjustment of the elastic element 0013 is completed; after the quantitative liquid filling is finished, a pipeline communicated between the switch valve A2 and the oil filling port of the thermometer bulb probe body 0011 and a pipeline communicated between the input end of the quantitative oil cup component 3 and the oil outlet of the connecting cylinder body 0012 are respectively cut off and welded to be sealed, and then the whole sealed thermometer bulb probe system 001 shown in fig. 1 is finished.

Claims

1. A vacuum quantitative liquid filling device for a thermometer bulb probe system is characterized in that: the oil tank (1) is communicated with an oil filling port of the thermometer bulb probe body through a pipeline, and the switch valve A (2) is installed on the pipeline communicated between the oil tank (1) and the oil filling port of the thermometer bulb probe body;

the input end of the quantitative oil cup assembly (3) is communicated with an oil outlet of the connecting cylinder body through a pipeline, the output end of the quantitative oil cup assembly (3) is communicated with the input end of the check valve (4) through a pipeline, and the output end of the check valve (4) is communicated with the air exhaust end of the vacuum pump (5).

2. A vacuum-dosing fluid-filled device for a bulb probe system according to claim 1, wherein: and a vacuum meter (6) is arranged on a pipeline communicated between the output end of the quantitative oil cup assembly (3) and the input end of the check valve (4).

3. A vacuum-dosing fluid-filled device for a bulb probe system according to claim 1, wherein: the quantitative oil cup assembly (3) comprises an oil cup A (301), an oil cup B (302), a switch valve B (303) and a corrugated pipe (305);

the input end of the oil cup A (301) is used as the input end of the quantitative oil cup assembly (3) and is communicated with an oil outlet of the connecting cylinder body through a pipeline, the output end of the oil cup B (302) is used as the output end of the quantitative oil cup assembly (3) and is communicated with the input end of the check valve (4) through a pipeline, the input end of the oil cup B (302) is communicated with the output end of the oil cup A (301) through a pipeline, and the switch valve B (303) is installed on a pipeline communicated between the input end of the oil cup B (302) and the output end of the oil cup A (301);

one end of the corrugated pipe (305) is opened, the other end of the corrugated pipe (305) is closed, one end of the corrugated pipe (305) is installed on the oil cup A (301), and the other end of the corrugated pipe extends into the inner side cavity of the oil cup A (301).

4. A vacuum-dosing fluid-filled device for a bulb probe system according to claim 3, wherein: the quantitative oil cup component (3) further comprises a pressurizing screw (304), and one end of the pressurizing screw (304) is abutted against the bottom surface of the corrugated pipe (305) from the inner side of the corrugated pipe (305).

5. The vacuum-dosing fluid-filled device for a bulb probe system according to claim 4, wherein: the pressure screw (304) is in threaded connection with the pressure screw mounting seat (306) and can form self-locking.

6. The vacuum-dosing fluid-filled device for a bulb probe system according to claim 5, wherein: the pressurizing screw rod mounting seat (306) is connected with the outer side surface of the oil cup A (301).

7. A vacuum-dosing fluid-filled device for a bulb probe system according to claim 3, wherein: the oil cup B (302) is made of transparent materials.

8. A vacuum-dosing fluid-filled device for a bulb probe system according to claim 1, wherein: and a copper pipe is adopted for a pipeline communicated between the switch valve A (2) and an oil filling port of the thermometer bulb probe body and a pipeline communicated between the input end of the quantitative oil cup assembly (3) and an oil outlet of the connecting cylinder body.