Device capable of monitoring leakage of transformer

Abstract

The utility model relates to a device capable of monitoring leakage of a transformer, which comprises a diaphragm mounting structure of a diaphragm type oil conservator and a leakage detection unit, and is technically characterized in that an annular monitoring groove is arranged on the upper surface of the outer edge of a lower shell of the diaphragm type oil conservator, and a positioning groove is arranged on the upper surface of the outer edge of an upper shell; the liquid leakage detection unit comprises a first liquid leakage sensor arranged on the upper surface of the diaphragm and a second liquid leakage sensor arranged in the positioning groove, and the detection end of the second liquid leakage sensor penetrates through the Z-shaped sealing gasket and is inserted into the annular monitoring groove. The device solves the problem that the butt joint of the upper shell and the lower shell of an existing oil conservator body is lack of a leakage monitoring structure, and further guarantees the operation reliability of a transformer.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer oil storage cabinet leakage monitoring, in particular to a device capable of monitoring transformer leakage. Background Art

[0002] Transformer oil plays the role of insulation, heat dissipation and arc extinguishing in the transformer, and its insulation performance directly affects the safe operation of the transformer. During the operation of the transformer, the internal oil temperature will change with the change of load and ambient temperature, causing the volume of the transformer oil to expand or contract. The double-sealed diaphragm oil conservator is an important component of the transformer, which is used to compensate for the change in transformer oil volume caused by changes in ambient temperature and temperature during transformer operation, and to ensure the insulation performance and stability of the transformer oil.

[0003] The diaphragm oil conservator uses a diaphragm to prevent the transformer oil from direct contact with the air, thereby avoiding oxidation and aging of the oil. At the same time, the floating design of the diaphragm can automatically adjust with the change of the oil level to maintain the stability of the oil level. However, the diaphragm material is easily affected by environmental factors and aged and failed. Especially in high temperature, high pressure or corrosive environment, the diaphragm will age faster. The aging diaphragm may crack or break, resulting in reduced sealing performance and even safety problems such as oil leakage.

[0004] CN 213988526 U discloses a double-sealed diaphragm oil storage cabinet with an oil leakage monitoring structure, which includes an oil storage cabinet body, a diaphragm is arranged in the oil storage cabinet body, and the oil storage cabinet body is divided into an upper cavity and a lower cavity, a plurality of sensors are arranged on the upper surface of the diaphragm, and a control box and a buzzer are arranged outside the oil storage cabinet body. The sensor is electrically connected to the control box, and the control box is electrically connected to the buzzer. When the oil storage cabinet is running, if the diaphragm is damaged, causing oil to float above the diaphragm, after the oil floats over the sensor, the sensor will transmit a signal to the control box and the high-decibel buzzer, and an alarm signal will be issued in time. The diaphragm oil storage cabinet is intended to achieve the purpose of monitoring leakage, but there are still the following problems: there is no leakage monitoring structure at the joint between the upper and lower shells of the oil storage cabinet body. Utility Model Content

[0005] The utility model aims to provide a device capable of monitoring transformer leakage with reasonable structure and reliable use, so as to solve the problem that the joint between the upper and lower shells of the existing oil storage cabinet body lacks a leakage monitoring structure, and further ensure the reliability of transformer operation.

[0006] The technical solution of the utility model is:

[0007] A device capable of monitoring transformer leakage, comprising a diaphragm installation structure and a leakage detection unit of a diaphragm oil conservator, the technical key points of which are: the diaphragm installation structure comprises an annular support portion arranged on the inner edge of the lower shell of the diaphragm oil conservator, and a pressure frame connected to the annular support portion, the annular support portion is composed of an annular vertical cylinder portion and an annular horizontal portion arranged on the inner circumferential surface of the annular vertical cylinder portion, the upper surface of the annular horizontal portion is provided with concentric annular grooves, the edge of the diaphragm is laid above the annular horizontal portion and a V-shaped sealing ring is sandwiched between the annular horizontal portion, a V-shaped pressure block corresponding to the concentric annular groove is laid above the edge of the diaphragm, an annular buffer pad is laid above the V-shaped pressure block, and the upper surface of the outer edge of the lower shell of the diaphragm oil conservator is provided with a pressure extending to the annular vertical cylinder portion. A Z-shaped sealing gasket on the upper end face of the cylinder, the cross-section of the pressure frame is Z-shaped, the upper horizontal section of the pressure frame is pressed on the Z-shaped sealing gasket above the annular vertical cylinder, and the lower horizontal section of the pressure frame is pressed on the annular buffer pad, the upper horizontal section of the pressure frame is connected and fixed to the annular vertical cylinder by screws, and the lower horizontal section is connected and fixed to the annular horizontal part by screws, the outer edge of the upper shell of the diaphragm oil storage cabinet is pressed on the Z-shaped sealing gasket above the outer edge of the lower shell, an annular monitoring groove is provided on the upper surface of the outer edge of the lower shell, a positioning groove is provided on the upper surface of the outer edge of the upper shell, the leakage detection unit includes a first leakage sensor arranged on the upper surface of the diaphragm and a second leakage sensor arranged in the positioning groove, the detection end of the second leakage sensor passes through the Z-shaped sealing gasket and is inserted into the annular monitoring groove.

[0008] In the above-mentioned device capable of monitoring transformer leakage, there are multiple first leakage sensors, which are arranged at intervals on the upper surface of the diaphragm, and the signal output cables of each first leakage sensor pass through the top of the diaphragm oil conservator, are bundled and connected to the alarm outside the diaphragm oil conservator.

[0009] The above-mentioned device capable of monitoring transformer leakage has a plurality of positioning grooves which are evenly spaced along the outer edge of the upper shell, and the signal output cables of the second leakage sensors are bundled and connected to the alarm outside the diaphragm oil storage cabinet.

[0010] The above-mentioned device capable of monitoring transformer leakage, the first leakage sensor includes a gate-shaped bracket, a sensor body fixed in the gate-shaped bracket, the lower end fold of the gate-shaped bracket is connected and fixed to the diaphragm, and the detection end of the sensor body is on the upper surface of the diaphragm.

[0011] The beneficial effects of the utility model are:

[0012] 1. By setting the first leakage sensor on the diaphragm, real-time monitoring and rapid response to the diaphragm oil leakage can be achieved, the quality of transformer oil can be ensured, and the staff can be reminded to perform maintenance in time.

[0013] 2. By setting multiple second leakage sensors at the joint of the upper and lower shells of the diaphragm oil storage cabinet, when oil seeps out of the joint of the upper and lower shells and falls into the annular monitoring groove, the second leakage sensor responds quickly, reminding the staff to quickly maintain and handle it in time, thereby improving the safety and reliability of the oil storage cabinet.

[0014] The first leakage sensor and the second leakage sensor can pre-judge the oil leakage of the oil storage tank diaphragm and the oil leakage at the joint between the upper shell and the lower shell, thereby achieving the purpose of ensuring the safe operation of the oil storage tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the use state of the utility model;

[0016] Figure 2 yes Figure 1 Left view of

[0017] Figure 3 yes Figure 1 Enlarged view of part A in the middle.

[0018] In the figure: 1. diaphragm oil storage cabinet, 101. upper shell, 102. lower shell, 2. signal output cable, 3. pressure frame, 4. first leakage sensor, 5. second leakage sensor, 6. diaphragm, 7. Z-shaped sealing gasket, 8. annular support part, 9. V-shaped sealing ring, 10. V-shaped pressure block, 11. annular buffer pad, 12. annular monitoring groove. DETAILED DESCRIPTION

[0019] The utility model is described in detail according to the accompanying drawings of the specification.

[0020] like Figure 1 to Figure 3 As shown, the device capable of monitoring transformer leakage includes a diaphragm mounting structure of a diaphragm oil storage cabinet 1 and a leakage detection unit.

[0021] The diaphragm mounting structure includes an annular support portion 8 provided on the inner edge of the lower shell 102 of the diaphragm oil storage cabinet, and a pressure frame 3 connected to the annular support portion 8. The annular support portion 8 is composed of an annular vertical cylinder portion and an annular horizontal portion provided on the inner circumference of the annular vertical cylinder portion. The upper surface of the annular horizontal portion is provided with a concentric annular groove, the edge of the diaphragm 6 is laid on the upper surface of the annular horizontal portion and a V-shaped sealing ring 9 is sandwiched between the annular horizontal portion, a V-shaped pressing block 10 corresponding to the concentric annular groove is laid on the upper surface of the edge of the diaphragm 6, and an annular buffer pad 11 is laid on the upper surface of the V-shaped pressing block 10. The upper surface of the outer edge of the lower shell 102 of the diaphragm oil storage cabinet is provided with a Z-shaped sealing pad 7 extending to the upper end surface of the annular vertical cylinder portion. The cross-section of the pressing frame 3 is Z-shaped, the upper horizontal section of the pressing frame 3 is pressed on the Z-shaped sealing gasket 7 above the annular vertical cylinder part, and the lower horizontal section of the pressing frame 3 is pressed on the annular buffer pad 11. The upper horizontal section of the pressing frame 3 is connected and fixed to the annular vertical cylinder part by screws, and the lower horizontal section is connected and fixed to the annular horizontal part by screws.

[0022] The outer edge of the upper shell 101 of the diaphragm oil storage cabinet is pressed on the Z-shaped sealing gasket 7 above the outer edge of the lower shell 102. The upper surface of the outer edge of the lower shell 102 is provided with an annular monitoring groove 12, and the upper surface of the outer edge of the upper shell 101 is provided with a positioning groove. The leakage detection unit includes a first leakage sensor 4 arranged on the upper surface of the diaphragm and a second leakage sensor 5 arranged in the positioning groove. The detection end of the second leakage sensor 5 passes through the Z-shaped sealing gasket 7 and is inserted into the annular monitoring groove 12.

[0023] In this embodiment, there are multiple first liquid leakage sensors 4, which are arranged at intervals on the upper surface of the diaphragm 6. The signal output cables 2 of each first liquid leakage sensor 4 pass through the top of the diaphragm oil conservator 1, are bundled and connected to the alarm outside the diaphragm oil conservator 1. There are multiple positioning grooves, which are evenly arranged along the outer edge of the upper shell 101. The signal output cables of each second liquid leakage sensor 5 are bundled and connected to the alarm outside the diaphragm oil conservator 1.

[0024] The first liquid leakage sensor 4 includes a gate-shaped bracket and a sensor body fixed in the gate-shaped bracket. The lower end fold of the gate-shaped bracket is connected and fixed to the diaphragm 6 , and the detection end of the sensor body is pressed against the upper surface of the diaphragm 6 .

[0025] Working principle:

[0026] 1. The pressing frame 3 is connected and fixed to the upper surface of the annular vertical cylinder part by screws. At the same time, the lower horizontal section of the pressing frame 3 presses the annular buffer pad 11 and is connected and fixed to the annular horizontal part by screws. The V-shaped pressing block 10 squeezes the diaphragm 6 into the V-shaped sealing ring 9 in the concentric annular groove, which increases the difficulty of leakage.

[0027] 2. When damage occurs on the diaphragm 6, the oil overflows the diaphragm 6 and contacts the detection end of the first leakage sensor 4. The first leakage sensor 4 feeds back a signal to the alarm to realize timely alarm.

[0028] 3. When oil leaks into the annular monitoring groove 12 through the joint between the upper and lower shells, the oil contacts the detection end of the second leakage sensor 5, and the second leakage sensor 5 feeds back a signal to the alarm to realize timely alarm.

[0029] The above is a detailed description of the embodiments of the utility model, but the above contents are only preferred embodiments of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of the invention of the utility model should still fall within the scope of this patent.

Claims

1. A device capable of monitoring transformer leakage, comprising a diaphragm mounting structure of a diaphragm oil conservator and a leakage detection unit, characterized in that: The diaphragm mounting structure comprises an annular support portion arranged on the inner edge of the lower shell of the diaphragm oil storage cabinet, and a pressure frame connected to the annular support portion. The annular support portion is composed of an annular vertical cylinder portion and an annular horizontal portion arranged on the inner circumferential surface of the annular vertical cylinder portion. The upper surface of the annular horizontal portion is provided with a concentric annular groove. The edge of the diaphragm is laid on the upper surface of the annular horizontal portion and a V-shaped sealing ring is sandwiched between the annular horizontal portion. A V-shaped pressure block corresponding to the concentric annular groove is laid on the upper surface of the edge of the diaphragm. An annular buffer pad is laid on the upper surface of the V-shaped pressure block. A Z-shaped sealing pad extending to the upper end surface of the annular vertical cylinder portion is provided on the upper surface of the outer edge of the lower shell of the diaphragm oil storage cabinet. The cross-section of the pressure frame is Z The upper horizontal section of the pressing frame is pressed on the Z-shaped sealing gasket above the annular vertical cylinder part, and the lower horizontal section of the pressing frame is pressed on the annular buffer pad. The upper horizontal section of the pressing frame is connected and fixed to the annular vertical cylinder part by screws, and the lower horizontal section is connected and fixed to the annular horizontal part by screws. The outer edge of the upper shell of the diaphragm oil storage cabinet is pressed on the Z-shaped sealing gasket above the outer edge of the lower shell, and the upper surface of the outer edge of the lower shell is provided with an annular monitoring groove, and the upper surface of the outer edge of the upper shell is provided with a positioning groove. The leakage detection unit includes a first leakage sensor arranged on the upper surface of the diaphragm and a second leakage sensor arranged in the positioning groove, and the detection end of the second leakage sensor passes through the Z-shaped sealing gasket and is inserted into the annular monitoring groove.

2. The device capable of monitoring transformer leakage according to claim 1, characterized in that: There are multiple first liquid leakage sensors, which are arranged at intervals on the upper surface of the diaphragm. The signal output cables of the various first liquid leakage sensors pass through the top of the diaphragm oil conservator, are bundled together and connected to the alarm outside the diaphragm oil conservator.

3. The device capable of monitoring transformer leakage according to claim 1, characterized in that: There are multiple positioning grooves, which are evenly spaced along the outer edge of the upper shell. The signal output cables of the second liquid leakage sensors are bundled and connected to the alarm outside the diaphragm oil storage cabinet.

4. The device capable of monitoring transformer leakage according to claim 1, characterized in that: The first liquid leakage sensor comprises a gate-shaped bracket and a sensor body fixed in the gate-shaped bracket. The lower end fold of the gate-shaped bracket is connected and fixed to the diaphragm, and the detection end of the sensor body is placed on the upper surface of the diaphragm.

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