A test tool and production line for transformer oil chromatographic monitoring device
By designing testing fixtures and production lines for multiple transformer oil chromatography monitoring devices that can be tested simultaneously, and by adopting double-inlet double-outlet branch pipes and self-sealing joints, the problem of low efficiency in traditional testing methods has been solved, achieving efficient and low-loss batch testing, and reducing production costs and the risk of misconnection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING ZHENYUAN ELECTRICAL CO LTD
- Filing Date
- 2025-05-20
- Publication Date
- 2026-05-29
AI Technical Summary
Traditional transformer oil chromatography monitoring devices have low testing efficiency, long testing cycles, and cannot be used for batch operations. Furthermore, repeated transfer of oil samples can easily cause contamination or loss, increasing maintenance costs.
Design a test fixture and production line that includes a table, an oil inlet pipe, an oil return pipe, and multiple test modules. It adopts a dual-inlet and dual-return branch pipe system and self-sealing connectors to achieve synchronous testing of multiple monitoring devices. It integrates power sockets and signal terminals to support synchronous access of oil circuit, power supply and signal, and builds a closed-loop oil circuit system.
It improved testing efficiency, shortened the pipeline connection time of a single device, reduced the oil sample circulation loss rate, avoided frequent manual handling of oil tanks, reduced production costs, simplified wiring operations, and reduced the risk of misconnection.
Smart Images
Figure CN224303639U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of online monitoring devices for transformer oil chromatography, specifically relating to a testing fixture and production line for a transformer oil chromatography monitoring device. Background Technology
[0002] Transformer oil chromatography online monitoring devices are intelligent equipment used to detect the composition and content of dissolved gases in transformer oil in real time. They assess the transformer's operating status and potential faults by analyzing changes in the gases within the oil. To ensure stable operation of these devices under complex conditions, reduce on-site failure rates, and guarantee the safe operation of the power system, a qualification test is required before the devices leave the factory. Traditional qualification tests typically employ a discrete, single-unit approach, where each device is manually equipped with an inlet pipe, return pipe, and oil tank to establish an oil sample circulation circuit. The test then checks whether the device can operate normally under simulated conditions. This method requires manual handling of oil tanks and connection of circulation circuits, resulting in low testing efficiency, long testing cycles, and inability to perform batch operations. Furthermore, repeated sample transfers can cause contamination or loss, increasing maintenance costs. Utility Model Content
[0003] The purpose of this invention is to provide a testing fixture and production line for a transformer oil chromatography monitoring device, so as to solve the problems of low testing efficiency, long testing cycle and inability to perform batch operations in traditional testing methods.
[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:
[0005] A testing fixture for a transformer oil chromatography monitoring device includes a table, an oil inlet pipe, an oil return pipe, and multiple testing modules. The table is used to place the transformer oil chromatography monitoring device to be tested. Each testing module includes a first oil inlet branch pipe and a second oil inlet branch pipe connected to the oil inlet pipe, as well as a first oil return branch pipe and a second oil return branch pipe connected to the oil return pipe. The first oil inlet branch pipe and the first oil return branch pipe are used to connect to an oil tank. The second oil inlet branch pipe and the second oil return branch pipe are used to connect to the oil inlet and oil outlet of the transformer oil chromatography monitoring device to be tested, respectively.
[0006] Furthermore, the first oil inlet branch pipe is equipped with an oil inlet ball valve, an oil inlet switch, and an oil inlet connector, and the second oil return branch pipe is equipped with an oil return ball valve, an oil return switch, and an oil return connector. The oil inlet switch and the oil return switch are used to control the opening and closing of the oil inlet ball valve and the oil outlet ball valve, respectively, and the oil inlet connector and the oil return connector are used to connect to the oil tank.
[0007] Furthermore, the ends of the second oil inlet branch pipe and the second oil return branch pipe that are away from the oil inlet pipe or the oil return pipe are equipped with self-sealing joints.
[0008] Furthermore, the test module also includes a signal line, one end of which is used to connect to the electrical test interface of the variable pressure oil chromatography monitoring device under test, and the other end of the signal line is provided with a terminal block.
[0009] Furthermore, the test module also includes an electrically connected air switch and a socket, the socket being used to plug in the power cord of the receiver transformer oil chromatography monitoring device.
[0010] A testing production line for a transformer oil chromatography monitoring device includes a power supply, an oil tank, a back-end computer, and multiple testing fixtures. Each testing fixture is equipped with two testing modules. The tables of adjacent testing fixtures are detachably connected, and the oil inlet and return pipes of adjacent testing fixtures are respectively connected to the main oil inlet and main oil return pipes. The power supply is electrically connected to the air switches and sockets of all testing modules. The oil tank is equipped with two flexible hoses, which are respectively connected to the oil inlet and return connectors of any one of the testing modules. The back-end computer is connected to the terminal block of any one of the testing modules via a cable to acquire the test data of the transformer oil chromatography monitoring device measured by that testing module.
[0011] Compared with the prior art, the present invention has the following beneficial technical effects:
[0012] 1. The testing fixture of this utility model, by setting up multiple independent testing modules, each equipped with a dual-inlet dual-return branch pipe system (first / second inlet and return oil branch pipes), can realize the synchronous testing of multiple monitoring devices, solving the problem of low efficiency of traditional single-unit serial testing; it adopts self-sealing joints to realize rapid oil circuit switching, and with the on / off control of inlet / return oil ball valves, the pipeline connection time of a single device is shortened from the traditional 15 minutes to less than 3 minutes; it also integrates electrical interfaces such as power sockets and signal terminals, supporting the synchronous access of the "oil circuit-power supply-signal" three systems, making wiring operation simple and convenient, and effectively avoiding the risk of misconnection caused by manual step-by-step operation.
[0013] 2. The testing production line of this utility model establishes a closed-loop oil circuit system and uses a central oil tank to supply oil to all testing modules. This not only reduces the oil sample circulation loss rate from the traditional 8% to below 0.5%, but also avoids frequent manual handling and installation of oil tanks, saving time and effort. By setting up a detachable and splicable table structure, enterprises can dynamically adjust the number of workstations according to production capacity needs, further controlling production costs. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the test fixture of this utility model;
[0015] Figure 2 This is a schematic diagram of the connection of the test production line of this utility model.
[0016] In the diagram: Table 1, Oil inlet pipe 2, Oil return pipe 3, Test module 4, First oil inlet branch pipe 41, First oil return branch pipe 42, Oil inlet switch 43, Oil inlet connector 44, Oil return switch 45, Oil return connector 46, Air switch 47, Socket 48, Terminal block 49. Detailed Implementation
[0017] The following detailed description illustrates the specific implementation method:
[0018] Example
[0019] like Figure 1 As shown, a test fixture for a transformer oil chromatography monitoring device includes a table 1, an oil inlet pipe 2, an oil return pipe 3, and two test modules 4. The table 1 is used to place the transformer oil chromatography monitoring device to be tested. Each test module 4 includes a first oil inlet branch pipe 41 and a second oil inlet branch pipe (not shown in the figure) connected to the oil inlet pipe 2, and a first oil return branch pipe 42 and a second oil return branch pipe (not shown in the figure) connected to the oil return pipe 3. The first oil inlet branch pipe 41 is equipped with an oil inlet ball valve, an oil inlet switch 43, and an oil inlet connector 44. The second oil return branch pipe is equipped with a oil return ball valve, an oil return switch 45, and an oil return connector 46. The oil inlet switch 43 and the oil return switch 45... The inlet and outlet ball valves are respectively used to control the opening and closing of the oil inlet ball valve and the oil return ball valve. The oil inlet connector 44 and the oil return connector 46 are used to connect to the oil tank. The ends of the second oil inlet branch pipe and the second oil return branch pipe away from the oil inlet pipe 2 or the oil return pipe 3 are provided with self-sealing connectors. The two self-sealing connectors are respectively used to connect to the oil inlet and oil outlet of the transformer oil chromatography monitoring device under test. The test module 4 also includes a signal line (not shown in the figure), as well as an air switch 47 and a socket 48 for electrical connection. One end of the signal line is used to connect to the electrical test interface of the transformer monitoring device under test. The other end of the signal line is provided with a terminal 49. The socket 48 is used to plug in the power cord of the transformer oil chromatography monitoring device under test.
[0020] The test fixture in this embodiment, by setting up multiple independent test modules 4, can realize the synchronous testing of multiple monitoring devices. The self-sealing connector can also realize the rapid switching of the oil circuit. With the control of the oil inlet / outlet switch 45, it can effectively shorten the pipeline connection time of a single monitoring device and improve the testing efficiency. In addition, it also integrates electrical interfaces such as power socket 48 and signal terminal 49, supporting the synchronous access of the "oil circuit-power supply-signal" three systems. The wiring operation is simple and convenient, effectively avoiding the risk of misconnection caused by manual step-by-step operation.
[0021] like Figure 2As shown, a test production line for a transformer oil chromatography monitoring device includes a power supply, an oil tank, a back-end computer, and multiple test fixtures. The tables 1 of two adjacent test fixtures are detachably connected by bolts, and the oil inlet pipes 2 and return pipes 3 of two adjacent test fixtures are respectively connected to the main oil inlet pipe and the main oil return pipe. The power supply is electrically connected to the air switch 47 and socket 48 of all test modules 4. Two flexible hoses are installed on the oil tank, and the two flexible hoses are respectively connected to the oil inlet connector 44 and the oil return connector 46 of any test module 4. The back-end computer can be connected to the terminal block 49 of any test module 4 via a cable to acquire the test data of the transformer oil chromatography monitoring device measured by that test module 4.
[0022] The process for mass production using the aforementioned test production line is as follows:
[0023] Step 1: Place all the transformer oil chromatography monitoring devices to be tested (hereinafter referred to as the devices to be tested) on the table 1, plug the power cord of the devices to be tested into the socket 48 of the corresponding test module 4, and connect the oil inlet and oil outlet of the devices to the self-sealing joints of the second oil inlet branch pipe and the second oil return branch pipe of the corresponding test module 4 respectively.
[0024] Step 2: Connect the two hoses of the oil tank to the first oil inlet branch pipe 41 and the first oil return branch pipe 42 of any one of the test modules 4 respectively;
[0025] Step 3: Open the oil inlet switch 43 and the oil outlet switch connected to the oil tank, and start the oil tank circulation pump to test the device under test. Connect the back-end computer to the wiring terminal 49 of the test module 4 to obtain the test data of the device under test.
[0026] Step 4: After the test is completed, turn off the oil inlet switch 43 and the oil return switch 45 connected to the oil tank, remove the monitoring device that has completed the test, and repeat steps 1-3 above to test the next batch of devices to be tested.
[0027] During the testing process in step 3 above, the oil sample circulation path is as follows:
[0028] Oil tank → First oil inlet branch pipe (normally closed) of the test module corresponding to the oil tank → Main oil inlet pipe → Second oil inlet branch pipe of each test module → Oil inlet of the monitoring device corresponding to the test module → Oil circuit inside the monitoring device → Oil outlet of the monitoring device → Second oil return branch pipe corresponding to the test module → Main oil return pipe → First oil return branch pipe of the test module corresponding to the oil tank → Oil tank
[0029] The test production line in this embodiment can dynamically adjust the number of workstations according to the actual production capacity needs of the enterprise, control production costs, and build an oil circuit closed-loop system on the test production line. All test modules 4 are supplied with oil through one oil tank, which can not only reduce the oil sample circulation loss rate, but also avoid frequent manual handling and installation of oil tanks, saving time and effort.
[0030] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.
Claims
1. A testing fixture for a transformer oil chromatography monitoring device, characterized in that: It includes a table (1), an oil inlet pipe (2), an oil return pipe (3), and multiple test modules (4). The table (1) is used to place the transformer oil chromatography monitoring device to be tested. Each test module (4) includes a first oil inlet branch pipe (41) and a second oil inlet branch pipe connected to the oil inlet pipe (2), as well as a first oil return branch pipe (42) and a second oil return branch pipe connected to the oil return pipe (3). The first oil inlet branch pipe (41) and the first oil return branch pipe (42) are used to connect to the oil tank. The second oil inlet branch pipe and the second oil return branch pipe are used to connect to the oil inlet and oil outlet of the transformer oil chromatography monitoring device to be tested, respectively.
2. The testing fixture according to claim 1, characterized in that: The first oil inlet branch pipe (41) is equipped with an oil inlet ball valve, an oil inlet switch (43) and an oil inlet connector (44), and the second oil return branch pipe is equipped with an oil return ball valve, an oil return switch (45) and an oil return connector (46). The oil inlet switch (43) and the oil return switch (45) are used to control the opening and closing of the oil inlet ball valve and the oil outlet ball valve, respectively. The oil inlet connector (44) and the oil return connector (46) are used to connect to the oil tank.
3. The testing fixture according to claim 2, characterized in that: The ends of the second oil inlet branch pipe and the second oil return branch pipe that are away from the oil inlet pipe (2) or the oil return pipe (3) are equipped with self-sealing joints.
4. The testing fixture according to claim 3, characterized in that: The test module (4) also includes a signal line, one end of which is used to connect to the electrical test interface of the variable pressure oil chromatography monitoring device under test, and the other end of which is provided with a terminal block (49).
5. The testing fixture according to claim 4, characterized in that: The test module (4) also includes an air switch (47) and a socket (48) that are electrically connected. The socket (48) is used to plug in the power cord of the test transformer oil chromatography monitoring device.
6. A testing production line for a transformer oil chromatography monitoring device, characterized in that: The device includes a power supply, an oil tank, a back-end computer, and multiple test fixtures as described in claim 5. Each test fixture is equipped with two test modules (4). The tables (1) of two adjacent test fixtures are detachably connected. The oil inlet pipe (2) and oil return pipe (3) of two adjacent test fixtures are respectively connected to the main oil inlet pipe and the main oil return pipe. The power supply is electrically connected to the air switch (47) and socket (48) of all test modules (4). The oil tank is equipped with two flexible hoses, which are respectively connected to the oil inlet connector (44) and oil return connector (46) of any test module (4). The back-end computer is connected to the terminal block (49) of any test module (4) via a cable to obtain the test data of the transformer oil chromatography monitoring device measured by the test module (4).