Explosion-proof high-voltage motor insulation monitoring device

Abstract

The utility model discloses an explosion-proof high-voltage motor insulation monitoring device, which relates to the technical field of motor monitoring equipment and comprises an insulation instrument and a high-voltage motor monitoring coupler, the high-voltage motor monitoring coupler further comprises an explosion-proof shell, side plates are fixedly mounted on two sides of the explosion-proof shell, a cable fixer is fixedly mounted on the front side of the explosion-proof shell, and the cable fixer is fixedly mounted on the front side of the explosion-proof shell. A protective pressure release valve is arranged on the rear side of the anti-explosion shell and comprises a valve body, a sealing cover is movably installed on the outer side of the valve body, and a valve deck is fixedly installed on one side of the valve body. The protective pressure release valve is arranged on one side of the anti-explosion shell and composed of the valve body, the sealing cover, the valve deck, the storage air bag, the sealing gasket, the compression spring and the like, and when the pressure in the anti-explosion shell is increased sharply, the sealing gasket can be pressed to move in the direction of the valve deck through pressure; and the storage air bag is compressed and the sealing cover is moved synchronously through the moving force of the sealing gasket, so that the pressure in the anti-explosion shell can be quickly discharged.

Description

Technical Field

[0001] The utility model relates to the technical field of motor monitoring equipment, in particular to an explosion-proof high-voltage motor insulation monitoring device. Background Art

[0002] High-voltage motor insulation monitoring is to monitor the insulation performance of the motor in real time, so as to timely detect and prevent problems such as aging and damage of insulation materials, thereby avoiding motor failure and shutdown caused by insulation failure. Insulation monitoring mainly includes insulation resistance testing, partial discharge detection and other methods, which can accurately evaluate the insulation status of the motor and provide an effective maintenance basis;

[0003] The high-voltage motor insulation monitoring system is generally composed of insulation meters, high-voltage motor online monitoring couplers, mutual inductors and other components. The high-voltage motor online monitoring coupler is electrically connected to the high-voltage cable. Therefore, the coupler is usually composed of multiple components in series, with many welding heads. During long-term use, a certain temperature will be generated, resulting in cold soldering or desoldering of some components. Sparks may occur under the operating voltage, causing oil deterioration and medium corrosion, and ultimately leading to the entire high-voltage motor online monitoring coupler deflagration. Therefore, pressure will accumulate in the coupler installation housing, which will cause the coupler housing to burst, causing damage to surrounding objects and even fire. Summary of the invention

[0004] The purpose of the utility model is to provide an explosion-proof high-voltage motor insulation monitoring device, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] An explosion-proof high-voltage motor insulation monitoring device comprises an insulation meter and a high-voltage motor monitoring coupler, the high-voltage motor monitoring coupler also comprising an explosion-proof shell, side panels are fixedly installed on both sides of the explosion-proof shell, a cable holder is fixedly installed on the front side of the explosion-proof shell, a protective pressure relief valve is arranged on the rear side of the explosion-proof shell, the protective pressure relief valve comprises a valve body, a sealing cover is movably installed on the outside of the valve body, a valve cover is fixedly installed on one side of the valve body, a sealing gasket is movably installed on one side of the valve cover located in the valve body, a storage air bag is movably installed between the sealing gasket and the valve cover, the valve body is fixedly installed on the rear side of the explosion-proof shell, and a top cover is fixedly installed on the top of the explosion-proof shell.

[0007] Preferably, the explosion-proof housing is provided with card slots on its inner circumference.

[0008] Preferably, four sealing flanges are fixedly installed circumferentially on the bottom of the top cover, a wire hole is opened in the top cover, and a sealing sleeve is inserted into the wire hole. The top cover is fixed to the top of the explosion-proof shell by screws, and one side of the sealing flange is clamped in the corresponding slot. Clamping one side of the sealing flange at the bottom of the top cover in the corresponding slot can improve the connection strength between the top cover and the explosion-proof shell.

[0009] Preferably, a fixing flange is fixedly mounted on one side of the valve body, a plurality of pressure relief holes are opened inside the valve body, and the fixing flange is fixedly mounted on the rear side of the explosion-proof housing by screws.

[0010] Preferably, a sealing ring is fixedly installed on one side of the valve cover, and a sealing groove is also provided on the valve cover located at the outer periphery of the sealing ring. A connecting shaft is inserted and installed at the center position of the valve cover, and a fixing block is fixedly installed on the outer side of the connecting shaft. Through the setting of the valve cover, conditions can be provided for the installation and displacement of the sealing cover, storage airbag and sealing gasket.

[0011] Preferably, a plurality of nozzles are fixedly mounted on one side of the storage airbag, the inner cavity of the nozzle is connected to the inner cavity of the storage airbag, a sealing sheet is fixedly mounted on one side of the nozzle, the sealing gasket is inserted in the sealing ring, and the connecting shaft passes through the hollow tube at the center position of the storage airbag.

[0012] Preferably, the through hole at the center of the sealing gasket is installed on the connecting shaft located on one side of the fixed block and fixed by a nut, and the multiple nozzles also penetrate the corresponding through holes in the sealing gasket, and a compression spring is installed in the sealing ring between the valve cover and the sealing gasket. The compression spring supports the sealing gasket, so that the sealing gasket compresses the storage airbag and the compression spring after being subjected to the impact force of the explosion, thereby allowing the fire extinguishing agent in the storage airbag to be sprayed into the explosion-proof shell through the multiple nozzles.

[0013] Preferably, the sealing cover is installed through the outside of the valve body and seals multiple pressure relief holes. One side of the sealing cover is also installed through the connecting shaft located on one side of the valve cover and fixed by a nut. The sealing gasket can push the sealing cover to move through the connecting shaft, so that the sealing cover moves on the outside of the valve body and exposes the pressure relief holes, thereby realizing the pressure relief function.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The utility model discloses an explosion-proof high-voltage motor insulation monitoring device, in which a protective pressure relief valve is arranged on one side of the explosion-proof housing, and the protective pressure relief valve is composed of a valve body, a sealing cover, a valve cover, a storage air bag, a sealing gasket, a compression spring and other components. When the pressure in the explosion-proof housing surges, the sealing gasket can be pressed and moved toward the valve cover by the pressure, and then the storage air bag is compressed and the sealing cover is moved synchronously by the force of the movement of the sealing gasket, so that the pressure inside the explosion-proof housing can be quickly discharged, and the fire extinguishing agent in the storage air bag is sprayed into the explosion-proof housing through multiple nozzles, so as to prevent the components in the explosion-proof housing from catching fire;

[0016] After the top cover is fixedly installed on the top of the explosion-proof housing by screws, the four sealing flanges at the bottom of the top cover are also respectively clamped in the corresponding slots, thereby improving the sealing and connection strength between the explosion-proof housing and the insulation instrument, and improving the explosion-proof capability of the explosion-proof housing and the top cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the system flow of the utility model;

[0018] Figure 2 This is a schematic diagram of the structural disassembly of the high-voltage motor monitoring coupler of the utility model;

[0019] Figure 3 It is a partial cross-sectional view of the top cover of the utility model;

[0020] Figure 4 This is a cross-sectional view of the valve body of the utility model;

[0021] Figure 5 It is a cross-sectional view of the valve cover of the utility model.

[0022] In the figure: 1. Insulation meter; 2. High-voltage motor monitoring coupler; 3. Explosion-proof housing; 4. Side panel; 5. Cable holder; 6. Protective pressure relief valve; 7. Valve body; 8. Sealing cover; 9. Valve cover; 10. Storage air bag; 11. Sealing gasket; 12. Top cover; 13. Card slot; 14. Sealing flange; 15. Wire hole; 16. Sealing sleeve; 17. Fixed flange; 18. Pressure relief hole; 19. Sealing ring; 20. Sealing groove; 21. Connecting shaft; 22. Fixed block; 23. Nozzle; 24. Compression spring. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] like Figure 1-Figure 5As shown, the utility model provides an explosion-proof high-voltage motor insulation monitoring device, including an insulation meter 1 and a high-voltage motor monitoring coupler 2, the high-voltage motor monitoring coupler 2 also includes an explosion-proof shell 3, side panels 4 are fixedly installed on both sides of the explosion-proof shell 3, a cable holder 5 is fixedly installed on the front side of the explosion-proof shell 3, a protective pressure relief valve 6 is arranged on the rear side of the explosion-proof shell 3, the protective pressure relief valve 6 includes a valve body 7, a sealing cover 8 is movably installed on the outer side of the valve body 7, a valve cover 9 is fixedly installed on one side of the valve body 7, a sealing gasket 11 is movably installed on one side of the valve cover 9 located in the valve body 7, a storage air bag 10 is movably installed between the sealing gasket 11 and the valve cover 9, the valve body 7 is fixedly installed on the rear side of the explosion-proof shell 3, and a top cover 12 is fixedly installed on the top of the explosion-proof shell 3.

[0025] like Figure 2-Figure 3 As shown, the inner side of the explosion-proof housing 3 is provided with card slots 13 in the circumferential direction, four sealing flanges 14 are fixedly installed in the circumferential direction of the bottom of the top cover 12, a wire hole 15 is provided in the top cover 12, and a sealing sleeve 16 is inserted and installed in the wire hole 15, and the top cover 12 is fixedly installed on the top of the explosion-proof housing 3 by screws, and one side of the sealing flange 14 is clamped in the corresponding card slot 13, and one side of the sealing flange 14 at the bottom of the top cover 12 is clamped in the corresponding card slot 13, which can improve the connection strength between the top cover 12 and the explosion-proof housing 3;

[0026] like Figure 4-Figure 5As shown, a fixing flange 17 is fixedly installed on one side of the valve body 7, a plurality of pressure relief holes 18 are provided on the inner side of the valve body 7, and the fixing flange 17 is fixedly installed on the rear side of the explosion-proof housing 3 by screws, a sealing ring 19 is fixedly installed on one side of the valve cover 9, and a sealing groove 20 is also provided on the valve cover 9 located at the outer peripheral position of the sealing ring 19, a connecting shaft 21 is inserted and installed at the center position of the valve cover 9, and a fixing block 22 is fixedly installed on the outer side of the connecting shaft 21. Through the setting of the valve cover 9, conditions can be provided for the installation and displacement of the sealing cover 8, the storage airbag 10 and the sealing gasket 11, a plurality of nozzles 23 are fixedly installed on one side of the storage airbag 10, and the inner cavity of the nozzle 23 is connected to the inner cavity of the storage airbag 10, and a sealing sheet is fixedly installed on one side of the nozzle 23, and the sealing gasket 11 is inserted and installed in the sealing ring 19, and the connecting shaft 21 passes through the hollow tube at the center position of the storage airbag 10, and the sealing gasket 11 at the center position The through hole is inserted and installed on the connecting shaft 21 located on one side of the fixed block 22 and fixed by a nut, and multiple nozzles 23 also penetrate the corresponding through holes in the sealing gasket 11, and a compression spring 24 is inserted and installed in the sealing ring 19 between the valve cover 9 and the sealing gasket 11. The compression spring 24 supports the sealing gasket 11, so that the sealing gasket 11 compresses the storage airbag 10 and the compression spring 24 after being subjected to the impact force of the explosion, thereby allowing the fire extinguishing agent in the storage airbag 10 to be sprayed into the explosion-proof shell 3 through the multiple nozzles 23. The sealing cover 8 is inserted and installed on the outside of the valve body 7 and seals the multiple pressure relief holes 18. One side of the sealing cover 8 is also inserted and installed on the connecting shaft 21 located on one side of the valve cover 9 and fixed by a nut. The sealing gasket 11 can push the sealing cover 8 to move through the connecting shaft 21, so that the sealing cover 8 moves outside the valve body 7 and exposes the pressure relief holes 18, thereby realizing the pressure relief function.

[0027] It should be noted that the utility model is an explosion-proof high-voltage motor insulation monitoring device. When monitoring the motor, the power supply 220VAC of the insulation instrument 1 is normal. Press the panel power switch, and the green power indicator light will light up. After the insulation instrument 1 is reset and preheated for about 10 minutes, it can be put into normal use. When the high-voltage vacuum circuit breaker is disconnected, the high-voltage motor stops working. At this time, the normally closed auxiliary contact is in a closed state. The signal of the switch closure is transmitted to the terminal corresponding to the wiring of the insulation instrument 1, and the insulation instrument 1 enters the cold machine waiting measurement time. This time is the cooling time after the motor has just been powered off. Subsequently, after the cold machine waiting time is over, the insulation instrument 1 enters the insulation resistance measurement state. The resistance measurement time is 1 minute. At the same time, the measurement voltage window will display 2500V. At this time, the insulation resistance displays the current resistance value. After the measurement time is over, the insulation instrument 1 stops the resistance measurement, and the insulation resistance displayed is full 1 The resistance value after minutes, when the insulation resistance measurement is completed, the insulation resistance automatic measurement mode waiting time, the measurement voltage in the coupler is turned off at the same time as the resistance measurement is completed, when the high-voltage vacuum circuit breaker is closed, the high-voltage motor starts to work, and the normally closed auxiliary contact is in the disconnected state. The signal of the switch disconnection is transmitted to the corresponding terminal of the insulation instrument 1, and the insulation instrument 1 enters the leakage current measurement state. The leakage current collected by the zero-sequence mutual inductor enters the insulation instrument 1 through the corresponding terminal. The insulation instrument 1 displays the real-time leakage current value, which can be used to regularly process whether the primary current is faulty. When the insulation resistance or leakage current alarm value occurs, the insulation resistance and leakage current dry contact outputs of the insulation instrument 1 and the corresponding terminals of the insulation instrument 1 will act at the same time. The insulation resistance measurement and leakage current process of the insulation instrument 1 can be uploaded to the host computer through RS-485.

[0028] During operation, when the components in the explosion-proof shell 3 explode, the pressure generated will push the sealing gasket 11 to the side of the valve cover 9, so that the valve cover 9 simultaneously pushes the connecting shaft 21, the storage airbag 10 and the compression spring 24 to one side, so that the high-voltage motor monitoring coupler 2 simultaneously drives the sealing cover 8 to move to one side on the outside of the valve body 7, so that the valve body 7 can expose multiple pressure relief holes 18, so that the pressurized gas is discharged from the multiple pressure relief holes 18. At the same time, after the sealing gasket 11 compresses the storage airbag 10, the fire extinguishing agent in the storage airbag 10 is squeezed into the multiple nozzles 23 through the pressure generated by the compression of the storage airbag 10, and the fire extinguishing agent breaks through the sealing sheet on one side of the nozzle 23 and is sprayed into the explosion-proof shell 3, so that the pressurized gas in the explosion-proof shell 3 can be discharged while preventing the components in the explosion-proof shell 3 from igniting, thereby preventing the explosion-proof shell 3 from bursting, and making the explosion-proof shell 3 reusable, and at the same time, protecting the equipment and items around the explosion-proof shell 3.

[0029] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An explosion-proof high-voltage motor insulation monitoring device, characterized in that: The invention comprises an insulation meter (1) and a high-voltage motor monitoring coupler (2), wherein the high-voltage motor monitoring coupler (2) further comprises an explosion-proof housing (3), side panels (4) are fixedly mounted on both sides of the explosion-proof housing (3), a cable holder (5) is fixedly mounted on the front side of the explosion-proof housing (3), a protective pressure relief valve (6) is arranged on the rear side of the explosion-proof housing (3), the protective pressure relief valve (6) comprises a valve body (7), a sealing cover (8) is movably mounted on the outer side of the valve body (7), a valve cover (9) is fixedly mounted on one side of the valve body (7), a sealing gasket (11) is movably mounted on one side of the valve cover (9) located in the valve body (7), a storage air bag (10) is movably mounted between the sealing gasket (11) and the valve cover (9), the valve body (7) is fixedly mounted on the rear side of the explosion-proof housing (3), and a top cover (12) is fixedly mounted on the top of the explosion-proof housing (3).

2. The explosion-proof high-voltage motor insulation monitoring device according to claim 1 is characterized in that: The explosion-proof housing (3) is provided with slots (13) in the circumferential direction of the inner side.

3. The explosion-proof high-voltage motor insulation monitoring device according to claim 2 is characterized in that: Four sealing flanges (14) are fixedly installed in the circumferential direction at the bottom of the top cover (12); a wire hole (15) is opened in the top cover (12); a sealing sleeve (16) is inserted into the wire hole (15); the top cover (12) is fixedly installed on the top of the explosion-proof housing (3) by screws, and one side of the sealing flange (14) is clamped in the corresponding clamping groove (13).

4. The explosion-proof high-voltage motor insulation monitoring device according to claim 1 is characterized in that: A fixing flange (17) is fixedly mounted on one side of the valve body (7), a plurality of pressure relief holes (18) are provided on the inner side of the valve body (7), and the fixing flange (17) is fixedly mounted on the rear side of the explosion-proof housing (3) by means of screws.

5. The explosion-proof high-voltage motor insulation monitoring device according to claim 4 is characterized in that: A sealing ring (19) is fixedly mounted on one side of the valve cover (9), and a sealing groove (20) is also provided on the valve cover (9) at an outer position of the sealing ring (19). A connecting shaft (21) is inserted and mounted at a central position inside the valve cover (9), and a fixing block (22) is fixedly mounted on the outer side of the connecting shaft (21).

6. The explosion-proof high-voltage motor insulation monitoring device according to claim 5 is characterized in that: A plurality of nozzles (23) are fixedly mounted on one side of the storage airbag (10); the inner cavity of the nozzles (23) is in communication with the inner cavity of the storage airbag (10); a sealing sheet is fixedly mounted on one side of the nozzles (23); the sealing pad (11) is inserted into the sealing ring (19); and the connecting shaft (21) passes through a hollow tube at a central position in the storage airbag (10).

7. The explosion-proof high-voltage motor insulation monitoring device according to claim 6 is characterized in that: The through hole at the center of the sealing gasket (11) is inserted and installed on the connecting shaft (21) located on one side of the fixing block (22) and fixed by a nut, and the plurality of nozzles (23) also penetrate the corresponding through holes in the sealing gasket (11), and a compression spring (24) is inserted and installed in the sealing ring (19) located between the valve cover (9) and the sealing gasket (11).

8. The explosion-proof high-voltage motor insulation monitoring device according to claim 4 is characterized in that: The sealing cover (8) is installed through the outside of the valve body (7) and seals the multiple pressure relief holes (18); one side of the sealing cover (8) is also installed through the connection shaft (21) located on one side of the valve cover (9) and is fixed by a nut.

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