Test bench of winding temperature controller for transformer

Abstract

The invention relates to a test bench of a winding temperature controller for a transformer. The test bench comprises a temperature controller mounting and fixing module, a power supply and signal output module and a detection operation table top. According to the test bench, rapid suspension and positioning of the temperature controller are realized through the multi-directional S-shaped hook and the fixing plate, reading and signal measurement processes are simplified, simultaneous detection of multiple test benches is supported, and wiring and wire changing operations are reduced. The device can also comprise a rectangular hole design, various power supply terminal configurations and the like, aims to improve the detection efficiency and safety, is suitable for regular detection of a large number of temperature controllers in an electric power system, and has wide application potential.

Description

Technical Field

[0001] The present application relates to the technical field of transformers, and in particular to a test bench for a transformer winding temperature controller. Background Art

[0002] The transformer winding (oil level) thermostat (hereinafter referred to as the thermostat) is an important device to improve the reliability and service life of the transformer and ensure the safe and stable operation of the transformer. It is widely installed and used on oil-immersed transformers. The thermostat of each transformer must be tested and qualified before the transformer can be put into operation. After the transformer is put into operation, it is also necessary to conduct periodic inspections along with the transformer maintenance.

[0003] The existing technology generally tests transformer winding thermostats based on JB / T8450-2016 "Test Bench for Transformer Winding Temperature Controllers". The test items include the dial temperature indication part, the remote signal part, the contact action error, the thermal simulation characteristics, etc., mainly including the following contents:

[0004] (1) Because temperature instruments take a long time to control temperature during the testing process, in order to improve efficiency, multiple instruments are usually used for testing at the same time. The temperature controller package will be placed in a constant temperature device. After the temperature stabilizes, the thermostat dial will be placed vertically to read the indicated value.

[0005] (2) Use a signal measuring instrument to measure the remote transmission signal output from its wiring terminals in turn. When the remote transmission signal is a temperature transmitter, an additional AC 220V or DC 24V power supply is required.

[0006] (3) After testing one thermostat, continue testing the next thermostat until all thermostats have been tested.

[0007] (4) Change the temperature of the thermostat and repeat the above steps until all test temperature points are completed.

[0008] The above prior art has the following technical problems:

[0009] (1) When reading the winding temperature controller, the dial must be manually placed in a vertical position for reading, and the data reading speed is slow.

[0010] (2) When measuring remote signals, it is necessary to constantly connect and replace wires between the temperature controllers. This operation is cumbersome and time-consuming. During the repeated wiring process, it is easy to cause measurement errors or even safety risks due to loose wiring.

[0011] (3) During the testing process, there are many temperature controllers to be tested and many testing instruments. Generally, the test bench cannot accommodate so many devices, and the placement of the instruments is inconvenient, which seriously affects the testing work. Summary of the invention

[0012] The purpose of the present application is to propose a test bench for a transformer winding temperature controller to solve the problem of vertical installation of the temperature controller during detection and insufficient placement space for simultaneous detection of multiple temperature controllers, as well as the problem of frequent line changes when measuring the temperature controllers one by one during the detection process.

[0013] To achieve the above-mentioned purpose, the embodiment of the present application provides a test bench for a transformer winding temperature controller, comprising a detection operation table, a temperature controller installation and fixing module, and a power supply and signal output module, wherein the power supply and signal output module is arranged on the detection operation table, and the temperature controller installation and fixing module is arranged on the power supply and signal output module;

[0014] The thermostat installation and fixing module includes a thermostat hanging bracket, a thermostat fixing plate and a plurality of multi-directional S-shaped hooks, the thermostat fixing plate is fixed with columns on the left and right sides, the thermostat hanging bracket is fixed to the top of the left and right columns, and the bottom ends of the left and right columns are fixed to the power supply and signal output module, one end of the multi-directional S-shaped hook is hung on the thermostat hanging bracket, and the other end is hung on the thermostat to fix the thermostat on the thermostat fixing plate;

[0015] The power supply and signal output module includes a power input main switch, a power socket, a power module, a conversion switch, multiple groups of signal terminals, multiple groups of power terminals and instrument connection terminals; the power module is connected to the power socket and the multiple groups of power terminals, and the power input main switch is used to control the power input of the entire test bench to realize one-key turning on or off of the power of the test bench; the power socket is used to connect the power input end of the measuring instrument, each thermostat corresponds to a group of signal terminals and a group of power terminals, the multiple groups of signal terminals are respectively used to connect the signal output ends of multiple thermostats, the multiple groups of power terminals are respectively used to connect multiple thermostats, and the instrument connection terminals are used to connect the measuring instrument; the conversion switch is used to connect the multiple groups of signal terminals and the instrument connection terminals, and by switching the switch position of the conversion switch, a group of signal terminals in the multiple groups of signal terminals is connected to the instrument connection terminals;

[0016] The detection operation table is used for placing measuring instruments and measuring tools.

[0017] Optionally, the multi-directional S-shaped hook includes a first hook and a second hook, and the first hook and the second hook are connected by a threaded connector to achieve 360° adjustment of direction.

[0018] Optionally, a rectangular hole is formed between the temperature controller fixing plate and the power supply and signal output module, for leading the capillaries of the plurality of temperature controllers out from the rear of the test bench.

[0019] Optionally, each group of power terminals includes a 220V DC power terminal and a 24V DC power terminal.

[0020] Optionally, the test bench is configured with multiple 2.5 mm2 test wires and multiple pin plugs for connection between the test bench and the temperature controller terminals.

[0021] Optionally, the detection operation table is provided with drawers and cabinets for daily placement of detection instruments and tools.

[0022] Optionally, the signal output terminal of the temperature controller outputs a Pt100 platinum thermal resistance signal and a temperature transmitter signal.

[0023] The present invention provides a novel transformer winding temperature controller test bench having the following features:

[0024] Beneficial effects:

[0025] (1) The thermostat installation and fixing module solves the problem of vertical installation during thermostat detection through the thermostat hanging bracket, fixing plate and multi-directional S-shaped hook, so that the thermostat can be conveniently hung and fixed, saving space and facilitating quick data reading.

[0026] (2) The setting of the power supply and signal output module enables multiple temperature controllers to be connected to the power supply and signal output at the same time, without the need for frequent wiring and replacement of wires, reducing the complexity of operation and the possibility of measurement errors. The conversion switch can be used to achieve rapid switching between the signal terminals of different temperature controllers and the measuring instrument.

[0027] (3) The testing operation table provides sufficient space for placing measuring instruments and tools, and is equipped with drawers and cabinets to facilitate daily management.

[0028] More features and advantages of the embodiments of the present application are reflected below. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 This is a schematic diagram of the structure of a test bench for a transformer winding temperature controller in an embodiment of the present application.

[0031] Figure 2 This is a schematic diagram of the structure of a multi-directional S-shaped hook in an embodiment of the present application. DETAILED DESCRIPTION

[0032] See also Figure 1 , the embodiment of the present application provides a test bench for a transformer winding temperature controller, comprising a detection operation table, a temperature controller installation and fixing module, and a power supply and signal output module, wherein the power supply and signal output module is arranged on the detection operation table, and the temperature controller installation and fixing module is arranged on the power supply and signal output module;

[0033] The thermostat installation and fixing module includes a thermostat hanging bracket, a thermostat fixing plate and a plurality of multi-directional S-shaped hooks, the thermostat fixing plate is fixed with columns on the left and right sides, the thermostat hanging bracket is fixed to the top of the left and right columns, and the bottom ends of the left and right columns are fixed to the power supply and signal output module, one end of the multi-directional S-shaped hook is hung on the thermostat hanging bracket, and the other end is hung on the thermostat to fix the thermostat on the thermostat fixing plate;

[0034] The power supply and signal output module includes a power input main switch, a power socket, a power module, a conversion switch, multiple groups of signal terminals, multiple groups of power terminals and instrument connection terminals; the power module is connected to the power socket and the multiple groups of power terminals, and the power input main switch is used to control the power input of the entire test bench to realize one-key turning on or off of the power of the test bench; the power socket is used to connect the power input end of the measuring instrument, each thermostat corresponds to a group of signal terminals and a group of power terminals, the multiple groups of signal terminals are respectively used to connect the signal output ends of multiple thermostats, the multiple groups of power terminals are respectively used to connect multiple thermostats, and the instrument connection terminals are used to connect the measuring instrument; the conversion switch is used to connect the multiple groups of signal terminals and the instrument connection terminals, and by switching the switch position of the conversion switch, a group of signal terminals in the multiple groups of signal terminals is connected to the instrument connection terminals;

[0035] The detection operation table is used for placing measuring instruments and measuring tools.

[0036] Furthermore, the multi-directional S-shaped hook includes a first hook and a second hook, and the first hook and the second hook are connected by a threaded connector to achieve 360° adjustment of direction.

[0037] Furthermore, a rectangular hole is formed between the temperature controller fixing plate and the power supply and signal output module, which is used to lead the capillaries of multiple temperature controllers out from the rear of the test bench.

[0038] Furthermore, each group of power terminals includes a 220V DC power terminal and a 24V DC power terminal.

[0039] Furthermore, the test bench is equipped with a plurality of 2.5 mm2 test wires and a plurality of pin-type plugs for connecting the test bench with the terminals of the thermostat.

[0040] Furthermore, the detection operation table is provided with drawers and cabinets for daily placement of detection instruments and tools.

[0041] Furthermore, the signal output terminal of the temperature controller outputs a Pt100 platinum thermal resistance signal and a temperature transmitter signal.

[0042] like Figure 1 The following is an example of a test bench capable of testing 4 thermostats. Figure 1 The example of the embodiment of the present application is described as follows:

[0043] (1) Thermostat installation and fixing module

[0044] Thermostat Hanging Bracket: Designed to be strong enough to support 4 thermostats, the bracket is made of metal material to ensure stability and durability.

[0045] Thermostat fixing plate: The fixing plate is large enough to hold four thermostats at the same time. There are two columns fixed on the left and right sides of the fixing plate, and the height of the columns is moderate to ensure that the thermostat can be hung horizontally.

[0046] Multi-directional S-shaped hooks: Each thermostat is equipped with a pair of multi-directional S-shaped hooks, one end of the hook is hung on the thermostat hanging bracket, and the other end is hung on the thermostat. The design of the hook allows the thermostat to be fine-tuned in the horizontal and vertical directions, ensuring that the thermostat is in the best reading position.

[0047] Optional, such as Figure 2 As shown, the hook includes a first hook and a second hook, which are connected by a threaded connector to achieve 360° adjustment direction. For example, hook 1 and hook 2 are rotated by threads so that thermostat A can be accurately positioned at the optimal reading angle.

[0048] (2) Power supply and signal output module

[0049] Main power input switch: controls the power input of the entire test bench, and turns the power of the test bench on or off with one button.

[0050] Power socket: 4 power sockets are provided, each socket is connected to the power input terminal of a measuring instrument.

[0051] Power supply module: Provides the required power for each thermostat, including 220V DC power supply and 24V DC power supply.

[0052] Conversion switch: used to connect one of the four signal terminals to the instrument connection terminal. For example, when the signal of thermostat B needs to be measured, operate the conversion switch to connect the signal terminal of thermostat B to the measuring instrument.

[0053] Signal terminals and power terminals: Each group includes a 220V DC power terminal, a 24V DC power terminal and a signal terminal, with a total of 4 groups, corresponding to 4 thermostats respectively.

[0054] Optional: Each set of power terminals includes 220V DC power terminals and 24V DC power terminals to meet the power requirements of different thermostats.

[0055] (3) Check the operating table

[0056] Inspection work surface: spacious enough to place 4 measuring instruments and required measuring tools at the same time.

[0057] Optional: The countertop is provided with drawers and cabinets for daily placement of testing instruments and tools, for example, spare pin plugs and test leads can be stored in drawers.

[0058] (4) Connection scheme

[0059] Test line and pin plug: multiple 2.5mm 2 Test wires and multiple pin plugs are used to connect the test bench to the thermostat terminals. For example, use 4 test wires and 4 pin plugs to connect the signal output terminals and power input terminals of 4 thermostats respectively.

[0060] (5) Signal output terminal

[0061] Signal output end of the temperature controller: Each temperature controller will output Pt100 platinum thermal resistance signal and temperature transmitter signal.

[0062] Optional: A rectangular hole is formed between the thermostat fixing plate and the power supply and signal output module, which is used to lead the capillaries of multiple thermostats out from the rear of the test bench. For example, the capillaries of thermostats A, B, C and D are neatly arranged and led out through the hole.

[0063] Through the implementation of the above technical details, the present invention can realize the simultaneous detection of four thermostats, greatly improve the detection efficiency, reduce the operation complexity and potential measurement errors, and ensure the safety and accuracy of the detection process.

[0064] Compared with the use of ordinary test benches, the test bench of the embodiment of the present application can reduce the detection time by about 60 minutes by using the test bench to reduce the operation process and improve the work efficiency by 20%. Considering the huge number of thermostats in the power system, the test bench has good and broad application prospects.

[0065] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A test bench for transformer winding temperature controller, characterized in that: It includes a detection operation table, a temperature controller installation and fixing module and a power supply and signal output module, wherein the power supply and signal output module is arranged on the detection operation table, and the temperature controller installation and fixing module is arranged on the power supply and signal output module; The thermostat installation and fixing module includes a thermostat hanging bracket, a thermostat fixing plate and a plurality of multi-directional S-shaped hooks, the thermostat fixing plate is fixed with columns on the left and right sides, the thermostat hanging bracket is fixed to the top of the left and right columns, and the bottom ends of the left and right columns are fixed to the power supply and signal output module, one end of the multi-directional S-shaped hook is hung on the thermostat hanging bracket, and the other end is hung on the thermostat to fix the thermostat on the thermostat fixing plate; The power supply and signal output module includes a power input main switch, a power socket, a power module, a conversion switch, multiple groups of signal terminals, multiple groups of power terminals and instrument connection terminals; the power module is connected to the power socket and the multiple groups of power terminals, the power input main switch is used to control the power input of the entire test bench, and realize one-key opening or closing of the power of the test bench; the power socket is used to connect the power input end of the measuring instrument, each thermostat corresponds to a group of signal terminals and a group of power terminals, the multiple groups of signal terminals are respectively used to connect the signal output ends of multiple thermostats, the multiple groups of power terminals are respectively used to connect multiple thermostats, and the instrument connection terminals are used to connect the measuring instrument; The conversion switch is used to connect the multiple groups of signal terminals and the instrument connection terminals, and by switching the switch position of the conversion switch, a group of signal terminals in the multiple groups of signal terminals is connected to the instrument connection terminal; The detection operation table is used for placing measuring instruments and measuring tools.

2. The test bench according to claim 1, characterized in that: The multi-directional S-shaped hook includes a first hook and a second hook, and the first hook and the second hook are connected by a threaded connector to achieve 360° adjustment of direction.

3. The test bench according to claim 1, characterized in that: A rectangular hole is formed between the temperature controller fixing plate and the power supply and signal output module, and is used to lead the capillaries of multiple temperature controllers out from the rear of the test bench.

4. The test bench according to claim 1, characterized in that: Each set of power terminals includes a 220V DC power terminal and a 24V DC power terminal.

5. The test bench according to claim 1, characterized in that: The test bench is equipped with a plurality of 2.5 mm2 test wires and a plurality of pin-type plugs for connection between the test bench and the temperature controller terminals.

6. The test bench according to claim 1, characterized in that: The detection operation table is provided with drawers and cabinets for daily placement of detection instruments and tools.

7. The test bench according to claim 1, characterized in that: The signal output end of the temperature controller outputs Pt100 platinum thermal resistance signal and temperature transmitter signal.

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