CN210136427U - Winding temperature controller calibration device and thermostatic bath system thereof - Google Patents
Winding temperature controller calibration device and thermostatic bath system thereof Download PDFInfo
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- CN210136427U CN210136427U CN201921451983.5U CN201921451983U CN210136427U CN 210136427 U CN210136427 U CN 210136427U CN 201921451983 U CN201921451983 U CN 201921451983U CN 210136427 U CN210136427 U CN 210136427U
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Abstract
The utility model relates to a winding temperature controller calibration equipment and a thermostatic bath system thereof, the thermostatic bath system comprises a thermostatic bath, a heating unit and a cooling pipeline system, the cooling pipeline system comprises a calibration medium loop and a refrigeration loop, the calibration medium loop comprises a pump and an oil tank which are connected by pipelines, an oil return port of the oil tank is communicated with an overflow port on the bath body by an overflow pipe, and a liquid outlet of the pump is communicated with a medium inlet of the bath body by a conveying pipe; the refrigeration loop comprises a compressor, a condenser, a throttling element and an evaporator, wherein the evaporator is arranged in the oil tank, the compressor can be started at any time according to needs and is not limited by the temperature of a checking medium, the compressor can be started at high temperature, and the generated cold energy can be stored in the oil tank in advance. When the temperature needs to be reduced, the cold checking medium is conveyed to the thermostatic bath by the oil tank by the pump, so that the purpose of reducing the temperature is achieved. In the cooling process, the temperature of the thermostatic bath can be adjusted only by conveying cold media, heating and refrigerating are not needed, and energy is saved.
Description
Technical Field
The utility model relates to a winding temperature controller check-up technical field, concretely relates to winding temperature controller check-up device and constant temperature groove system thereof.
Background
The winding temperature controller for the transformer is important non-electric quantity protection equipment for the transformer and is used for measuring and controlling the temperature of a transformer winding. In order to protect the safe operation of the transformer, the temperature of the cooling medium and the winding of the transformer needs to be controlled within a specified range, and a temperature controller is needed to provide the functions of temperature measurement, cooling control and the like. When the temperature exceeds the allowable range, an alarm or trip signal is provided, and the service life of the transformer is ensured.
Whether the winding temperature controller for the transformer can provide effective protection for the transformer depends on whether the winding temperature controller can normally operate, and the method for judging whether the winding temperature controller can normally operate is to calibrate the winding temperature controller. Therefore, documents such as DL/T573 Power Transformer inspection guide and management regulations of national grid company 'five-way one measure' provide clear regulations for the calibration of the temperature controller. However, the winding temperature controllers are small in verification quantity, long in verification interval period and poor in economic benefit, so that the verification of the winding temperature controllers at present stays in a theoretical stage more, and equipment specially used for verifying the winding temperature controllers is lacked in the market. The equipment which can be used for verifying the winding temperature controller is also mainly used for verifying other equipment and also for verifying the winding temperature controller, and the equipment mainly adopts a mode of a constant temperature bath and auxiliary equipment to verify the winding temperature controller when the winding temperature is verified, so that the following problems exist.
(1) The thermostatic bath is adopted for verification, the function is single, only a temperature source is provided, and the verification of the switch and the thermal simulation characteristic cannot be provided. And the switch and thermal simulation characteristic verification is performed by adopting modes of adding auxiliary equipment and the like, for example, the universal meter is adopted to manually verify the switch contact. The thermal simulation is verified by applying a current meter to the constant current source. The method is simple, but needs more auxiliary equipment, and has the disadvantages of complex operation, large workload of operators, long checking time and poor accuracy.
(2) The checking range is narrow, and the checking medium needs to be replaced or a plurality of constant temperature tanks need to be used. Because the temperature application range of the winding temperature controller is 0-160 ℃, the calibration medium used by the existing thermostatic bath has a certain application range, such as the application temperature range of formaldehyde is-96-60 ℃, the application temperature range of water is 0-95 ℃, and the application temperature range of mineral oil is 40-190 ℃. The full-range calibration of the winding temperature controller cannot be met, so that a customer needs to continuously replace a calibration medium or purchase and use a plurality of thermostatic tanks to complete the temperature calibration of the winding temperature controller.
(3) Many equipment only have the control of rising temperature, and the cooling adopts the natural cooling mode, and cooling process speed is slow and uncontrolled, and the routine test of winding temperature controller needs check-up return difference and switching poor, consequently can not satisfy the check-up demand of winding temperature controller.
(4) The thermostatic bath equipment adopts the compressor to cool, a refrigeration evaporator coil is arranged in a checking medium, the checking medium can not be started due to overhigh pressure in a refrigeration pipeline when the temperature is higher, the compressor can only be started when the checking medium is in a normal temperature state, and after the compressor stops working, the residual compressed refrigerant in the condenser can still continue to evaporate and absorb heat, the temperature of the checking medium is continuously reduced, so that the temperature in an oil groove can not be directly controlled by controlling the starting and stopping of the compressor, in addition, the compressor can be restarted after the pressure in the copper pipe is balanced after the compressor stops working, otherwise, the service life of the compressor is shortened, therefore, the compressor can not be stopped when the thermostatic bath equipment adopting the compressor to cool normally works, the compressor can maintain the stable temperature and needs to refrigerate and heat and balance at the same time, resources are wasted, and the temperature of the checking, the degree of fluctuation is large.
The utility model discloses a thermostat that can lower temperature as utility model patent of grant publication No. CN207401496U, it includes agitator, electric heater, accuse temperature sensor, the cold evaporimeter in groove, and the cold evaporimeter in groove sets up in the thermostat.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a winding temperature controller calibration equipment to solve the constant temperature bath equipment that has adopted the compressor cooling now and can not shut down at normal during operation compressor, keep the stability of temperature to need refrigerate while heating balance, not only the resource-wasting, still hardly control the problem of the temperature of check-up medium. And simultaneously, the utility model provides a constant temperature groove system.
In order to achieve the above object, the utility model discloses constant temperature bath system adopts following technical scheme:
the thermostatic bath system comprises a thermostatic bath, a heating unit, a stirring unit and a cooling pipeline system, wherein the thermostatic bath is provided with a bath body for containing a checking medium, the heating unit comprises a heating element arranged in the bath body, and the stirring unit comprises a stirring shaft arranged in the bath body;
the cooling pipeline system comprises a checking medium loop and a refrigerating loop, the checking medium loop comprises a pump and an oil tank which are connected through pipelines, the pump is connected with an oil outlet of the oil tank, an oil return port of the oil tank is communicated with an overflow port on the tank body through an overflow pipe, a liquid outlet of the pump is communicated with a medium inlet of the tank body through a conveying pipe, and the oil tank is provided with a cavity for containing the same checking medium as that in the thermostatic tank;
the refrigeration loop comprises a compressor, a condenser, a throttling piece and an evaporator, wherein the outlet of the compressor is connected with the condenser, the throttling piece and the evaporator are sequentially connected in series, the evaporator is connected with the inlet of the compressor, and the evaporator is arranged in the oil tank.
Further, the heating unit is an electric heating pipe, and the electric heating pipe is located in the groove body.
Further, the stirring unit comprises a stirring motor, an extension shaft of the stirring motor forms the stirring shaft, and the stirring shaft extends into the tank body.
Furthermore, the thermostatic bath system also comprises a temperature measuring unit which adopts a temperature control platinum resistor and is arranged in the bath body for measuring the temperature of the checking medium.
Furthermore, an electromagnetic valve is arranged on the conveying pipe.
Furthermore, a drying filter is connected in series with a pipeline between the throttling element and the condenser in the refrigeration circuit.
The utility model discloses winding temperature controller calibration equipment adopts following technical scheme:
the winding temperature controller calibration device comprises a rack and a thermostatic bath system, wherein the thermostatic bath system comprises a thermostatic bath, a heating unit, a stirring unit and a cooling pipeline system, the thermostatic bath is provided with a bath body for containing a calibration medium, the heating unit comprises a heating element arranged in the bath body, and the stirring unit comprises a stirring shaft arranged in the bath body;
the cooling pipeline system comprises a checking medium loop and a refrigerating loop, the checking medium loop comprises a pump and an oil tank which are connected through pipelines, the pump is connected with an oil outlet of the oil tank, an oil return port of the oil tank is communicated with an overflow port on the tank body through an overflow pipe, a liquid outlet of the pump is communicated with a medium inlet of the tank body through a conveying pipe, and the oil tank is provided with a cavity for containing the same checking medium as that in the thermostatic tank;
the refrigeration loop comprises a compressor, a condenser, a throttling piece and an evaporator, wherein the outlet of the compressor is connected with the condenser, the throttling piece and the evaporator are sequentially connected in series, the evaporator is connected with the inlet of the compressor, and the evaporator is arranged in the oil tank.
Furthermore, the delivery pipe is provided with an electromagnetic valve, and the electromagnetic valve, the compressor, the pump, the heating unit and the stirring unit are all connected with a microcomputer measurement and control system.
Furthermore, a constant current source and an ammeter are arranged on the rack, the constant current source is connected with the heating unit, the heating unit is an electric heating unit, and the ammeter is used for displaying a current value in the heating process.
Furthermore, a range hood is further arranged on the rack and is positioned above the thermostatic bath.
The utility model has the advantages that:
the utility model discloses a thermostatic bath system, including thermostatic bath and cooling pipe-line system, cooling pipe-line system includes check-up medium return circuit, refrigeration circuit, and check-up medium return circuit includes pump, oil tank through the tube coupling, and the pump is connected with the oil-out of oil tank, and the oil return opening of oil tank and the overflow mouth on the cell body communicate through the overflow pipe, and the liquid outlet of pump and the medium import of cell body communicate through the medium conveyer pipe, and the oil tank has the cavity that is used for holding the check-up medium the same with in the thermostatic bath; the refrigeration loop comprises a compressor, a condenser, a throttling element and an evaporator, wherein the outlet of the compressor is connected with the condenser, the throttling element and the evaporator are sequentially connected in series, and the evaporator is connected with the inlet of the compressor. Because the evaporator is arranged in the oil tank, the compressor can be started at any time according to needs and is not limited by the temperature of the checking medium, the compressor can be started at high temperature, and cold energy generated by the refrigeration loop can be stored in the oil tank in advance. The heating unit can heat the check-up medium in the constant temperature bath, and the stirring unit can stir the check-up medium for it is fast, and even to go up and down the temperature. When the thermostatic bath needs to be cooled, cold checking media are conveyed to the thermostatic bath by the oil tank by the pump, the purpose of cooling is achieved, and the cooling speed can be adjusted randomly according to the conveyed media amount. In the cooling process, the temperature of the thermostatic bath can be adjusted only by conveying cold media, heating and refrigerating are not needed, energy is saved, and the thermostatic bath is easy to control and high in accuracy.
Drawings
Fig. 1 is a schematic front view of the winding temperature controller calibration device of the present invention;
fig. 2 is a right schematic view of the winding temperature controller calibration device of the present invention;
FIG. 3 is a schematic diagram of a thermostatic bath system;
fig. 4 is a control schematic diagram of the winding temperature controller calibration device of the present invention.
Names corresponding to the marks in the figure:
1. the device comprises a condenser, 2, a drying filter, 3, a compressor, 4, a capillary tube, 5, an evaporator, 6, an oil tank, 7, a conveying pipe, 8, a variable pump, 9, an electromagnetic valve, 10, an ammeter, 11, a constant temperature tank, 12, a temperature control platinum resistor, 13, a heating pipe, 14, an overflow pipe, 15, a stirring motor, 16, a frame, 17, a smoke exhaust ventilator, 18 and a constant current source.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
The embodiment of the utility model provides a:
as shown in fig. 1-4, the winding temperature controller calibration device includes a frame 16 and a thermostatic bath system, the thermostatic bath system includes a thermostatic bath 11, a heating unit, a stirring unit, a temperature measuring unit, and a cooling pipeline system, and the thermostatic bath 11 has a bath body for containing a calibration medium. The heating unit comprises a heating element arranged in the tank body, the heating element adopts an electric heating type heating pipe 13, and the heating pipe 13 is positioned on the left side in the tank body of the thermostatic tank 11.
The stirring unit comprises a stirring shaft arranged in the tank body, and specifically, the stirring unit comprises a stirring motor 15 with an extended shaft, the extended shaft of the stirring motor 15 forms the stirring shaft, and the stirring shaft extends into the tank body. The lower part of the stirring shaft is provided with stirring blades, the stirring shaft penetrates through the center of the disk-shaped heating pipe, and the stirring can play a role in quickly raising the temperature and homogenizing the temperature. The upper part of the stirring motor 15 is fixed on the upper side of the tank body.
The temperature measuring unit adopts a temperature-controlled platinum resistor 12, is arranged at the right side in the tank body and is used for measuring the temperature of the checking medium.
The cooling pipeline system comprises a checking medium loop and a refrigerating loop, the checking medium loop comprises a pump and an oil tank 6 which are connected through a pipeline, and the pump in the implementation adopts a variable pump 8. The variable pump 8 is connected with the oil outlet of the oil tank 6, the oil return port of the oil tank 6 is communicated with the overflow port on the tank body through an overflow pipe 14, and the liquid outlet of the variable pump 8 is communicated with the medium inlet of the tank body through a conveying pipe 7. The oil tank 6 has a cavity for holding the same checking medium as in the thermostatic bath 11, and the oil tank 6 is filled with the checking medium. The delivery pipe 7 is provided with an electromagnetic valve 9 for controlling the on-off of the cold checking medium.
Refrigeration circuit includes compressor 3, condenser 1, capillary 4, evaporimeter 5, drier- filter 2, and 3 exports of compressor are connected with condenser 1, and condenser 1, drier-filter 2, capillary 4, evaporimeter 5 concatenate in proper order, evaporimeter 5 and 3 access connection of compressor, evaporimeter 5 set up in oil tank 6.
The electromagnetic valve 9, the compressor 3, the variable pump 8, the heating pipe 13, the stirring motor 15 and the temperature control platinum resistor 12 are all connected with a microcomputer measurement and control system. The utility model discloses the calibration equipment still is equipped with signal collector for gather the contact signal of the temperature controller that awaits measuring.
The rack 16 is provided with a constant current source 18 and an ammeter 10, the constant current source 18 is connected with the heating pipe 13, and the ammeter 10 is used for displaying the current value in the heating process.
The frame 16 is also provided with a smoke exhaust ventilator 17, and the smoke exhaust ventilator 17 is positioned above the right side of the groove body of the thermostatic groove 11. The smoke exhaust ventilator 17 can suck away smoke generated in the test process.
The utility model discloses a winding temperature controller calibration equipment's theory of operation as follows:
when indicating value error, indicating value return difference, indicating value repeatability measurement, contact point action error test and switching difference measurement are carried out, the winding or oil surface temperature controller to be measured is placed into the thermostatic bath 11 according to requirements, platinum resistor wiring and switch wiring are connected into equipment, basic parameters of the winding or oil surface temperature controller to be measured are input into a computer, and the computer automatically sets indicating value check points according to the parameters of the temperature controller and starts checking work. The heating pipe 13 works to heat the checking medium in the thermostatic bath 11. The range hood 17 is started to discharge smoke, the compressor 3 is started simultaneously, the medium in the oil tank 6 is cooled, cold energy is stored, after the temperature rising process is completed, the variable pump 8 is started, the cooling medium in the oil tank 6 is input into the tank body on the left side of the thermostatic tank 11 under the control of the computer and the microcomputer measurement and control system according to program requirements, the cooling medium is mixed with a high-temperature checking medium, the temperature of the checking medium is reduced, the lower stroke check is started until the check is completed, the indication error, the indication return difference, the contact action error test and the switching difference measurement can be completed in the one-time temperature rising and falling process, in the check process, the signal collector always collects contact signals, the computer automatically records the medium temperature when the contact action is performed, the check process is repeated for 3 times, and the indication repeatability.
Thermal simulation characteristic test:
and the winding temperature controller is connected to a winding temperature controller calibration device according to the description, the computer automatically adjusts the medium temperature in the thermostatic bath 11 and controls the constant current source 18 to output 740mA current, after 45min, the indication value of the temperature controller, the indication value of the remote transmission signal device, the actual temperature of the thermostatic bath 11 and the heating current are read, errors are calculated, then the output currents are respectively adjusted to 1040mA and 1440mA currents in sequence, the operation is completed according to the same flow, and the thermal simulation characteristic test is completed.
The utility model discloses winding temperature controller calibration equipment adopts computer control, accomplishes winding temperature controller indicating value error measurement, indicating value return difference measurement, indicating value repeatability measurement, contact action error test and switching difference measurement and thermal simulation characteristic test with a check-up medium, a equipment, and has the characteristics that the temperature rise and fall is controllable, the degree of accuracy is high, easy operation, use reliably, low in labor strength, work efficiency is high.
The utility model discloses the embodiment of constant temperature groove system, constant temperature groove system structure, principle in the constant temperature groove system and the above-mentioned calibration equipment embodiment are the same, no longer detailed.
In other embodiments, the heating unit may also adopt other heating methods, for example, a heat pump system is used, and a heat exchanger in the heat pump system is arranged in the thermostatic bath. The heating pipe is made into a coil pipe, the heating area is large, and a heating rod can be adopted.
In this embodiment, adopt the agitator motor who adds the major axis as the stirring unit, compact structure, simple to operate, in other embodiments, the (mixing) shaft also can be driven by other mechanisms, for example electricity pushes away push rod, cylinder etc. and drive the (mixing) shaft and go up and down, and then drives the stirring piece of (mixing) shaft lower part and stir the check-up medium in the constant temperature tank.
In this embodiment, a capillary tube is used as the throttle, and in other embodiments, an electronic expansion valve or the like may be used instead of the capillary tube.
In other embodiments, the temperature measuring unit may also use other temperature sensors to monitor the temperature value in the thermostatic bath.
The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by the teaching of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as the present invention, fall within the protection scope of the present invention.
Claims (10)
1. Constant temperature groove system, its characterized in that: the device comprises a thermostatic bath, a heating unit, a stirring unit and a cooling pipeline system, wherein the thermostatic bath is provided with a bath body for containing a checking medium, the heating unit comprises a heating element arranged in the bath body, and the stirring unit comprises a stirring shaft arranged in the bath body;
the cooling pipeline system comprises a checking medium loop and a refrigerating loop, the checking medium loop comprises a pump and an oil tank which are connected through pipelines, the pump is connected with an oil outlet of the oil tank, an oil return port of the oil tank is communicated with an overflow port on the tank body through an overflow pipe, a liquid outlet of the pump is communicated with a medium inlet of the tank body through a conveying pipe, and the oil tank is provided with a cavity for containing the same checking medium as that in the thermostatic tank;
the refrigeration loop comprises a compressor, a condenser, a throttling piece and an evaporator, wherein the outlet of the compressor is connected with the condenser, the throttling piece and the evaporator are sequentially connected in series, the evaporator is connected with the inlet of the compressor, and the evaporator is arranged in the oil tank.
2. The thermostatic bath system of claim 1, wherein: the heating unit is an electric heating pipe which is positioned in the groove body.
3. The thermostatic bath system of claim 1, wherein: the stirring unit comprises a stirring motor, a long shaft of the stirring motor forms the stirring shaft, and the stirring shaft extends into the tank body.
4. The thermostatic bath system of claim 1, wherein: the thermostatic bath system also comprises a temperature measuring unit which adopts a temperature control platinum resistor and is arranged in the bath body for measuring and checking the temperature of the medium.
5. The thermostatic bath system according to any one of claims 1 to 4, wherein: the delivery pipe is provided with an electromagnetic valve.
6. The thermostatic bath system according to any one of claims 1 to 4, wherein: and a pipeline between the throttling piece and the condenser in the refrigeration loop is also connected with a drying filter in series.
7. Winding temperature controller calibration equipment, its characterized in that: the device comprises a rack and a thermostatic bath system, wherein the thermostatic bath system comprises a thermostatic bath, a heating unit, a stirring unit and a cooling pipeline system, the thermostatic bath is provided with a bath body for containing a checking medium, the heating unit comprises a heating element arranged in the bath body, and the stirring unit comprises a stirring shaft arranged in the bath body;
the cooling pipeline system comprises a checking medium loop and a refrigerating loop, the checking medium loop comprises a pump and an oil tank which are connected through pipelines, the pump is connected with an oil outlet of the oil tank, an oil return port of the oil tank is communicated with an overflow port on the tank body through an overflow pipe, a liquid outlet of the pump is communicated with a medium inlet of the tank body through a conveying pipe, and the oil tank is provided with a cavity for containing the same checking medium as that in the thermostatic tank;
the refrigeration loop comprises a compressor, a condenser, a throttling piece and an evaporator, wherein the outlet of the compressor is connected with the condenser, the throttling piece and the evaporator are sequentially connected in series, the evaporator is connected with the inlet of the compressor, and the evaporator is arranged in the oil tank.
8. The winding temperature controller verification device according to claim 7, wherein: the conveying pipe is provided with an electromagnetic valve, and the electromagnetic valve, the compressor, the pump, the heating unit and the stirring unit are all connected with the microcomputer measurement and control system.
9. The winding temperature controller verification device according to claim 7, wherein: the frame is provided with a constant current source and an ammeter, the constant current source is connected with a heating unit, the heating unit is an electric heating unit, and the ammeter is used for displaying the current value in the heating process.
10. The winding temperature controller verification device according to any one of claims 7 to 9, wherein: and the frame is also provided with a smoke exhaust ventilator which is positioned above the thermostatic bath.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921451983.5U CN210136427U (en) | 2019-09-03 | 2019-09-03 | Winding temperature controller calibration device and thermostatic bath system thereof |
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| CN201921451983.5U CN210136427U (en) | 2019-09-03 | 2019-09-03 | Winding temperature controller calibration device and thermostatic bath system thereof |
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| CN210136427U true CN210136427U (en) | 2020-03-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110442118A (en) * | 2019-09-03 | 2019-11-12 | 郑州赛奥电子股份有限公司 | Winding temperature controller calibration equipment and its thermostatic bath system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110442118A (en) * | 2019-09-03 | 2019-11-12 | 郑州赛奥电子股份有限公司 | Winding temperature controller calibration equipment and its thermostatic bath system |
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