Explosion-proof and pressure release integrated device for tap switch protection

Abstract

The invention relates to an explosion-proof and pressure release integrated device for tap switch protection. The explosion-proof and pressure release integrated device comprises a shell made of a special material alloy steel, a pressure release mechanism, an explosion-proof mechanism, a backflow prevention mechanism and an auxiliary release mechanism, wherein the shell is installed on the tap switch, the pressure release mechanism is installed in the shell and communicated with the internal space of the tap switch, the explosion-proof mechanism is installed on the inner wall of the shell, the pressure release mechanism is located in the explosion-proof mechanism, and the shell is connected with a pressure release pipe. The tap switch is monitored through the pressure release mechanism to release pressure, the pressure can be timely and effectively released when the internal pressure of the tap switch rises, meanwhile, the interior is protected through the explosion-proof mechanism, the device has good explosion-proof performance, explosion accidents are prevented, the backflow prevention mechanism is arranged, and the backflow prevention mechanism is used for preventing backflow of the tap switch. And the discharged gas and liquid are blocked in a backflow manner, and meanwhile, the backflow of external air after the pressure is released is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of power equipment protection, and in particular to an integrated explosion-proof and pressure-releasing device for tap changer protection. Background Art

[0002] In power systems, tap changers are crucial for voltage regulation. However, when a fault occurs inside a tap changer, such as an arc discharge, a large amount of energy is generated, causing a sharp increase in internal pressure. This high pressure can cause the tap changer to explode, causing not only severe damage to the device itself but also potential hazards to surrounding equipment and personnel.

[0003] At present, although there are some protective devices for tap changers on the market, most of them have insufficient explosion-proof performance and untimely or incomplete pressure release. At the same time, the explosion-proof structure design of some devices is complex and costly, and the explosion-proof effect is poor in actual operation. Some pressure release devices cannot effectively prevent the backflow of external air after the pressure is released, which can easily cause secondary accidents.

[0004] Therefore, it is of great practical significance to develop an efficient, reliable and cost-effective tap changer protection device. Summary of the Invention

[0005] In order to solve the problems that existing protection devices have insufficient explosion-proof performance, untimely or incomplete pressure release, and some devices have complex explosion-proof structure designs, high costs, and poor explosion-proof effects in actual operation, and some pressure release devices cannot effectively prevent the backflow of external air after pressure release, which easily causes secondary accidents, the present application provides an integrated explosion-proof and pressure release device for tap changer protection.

[0006] This application provides an integrated explosion-proof and pressure-releasing device for tap-changer protection, which adopts the following technical solution: Integrated explosion-proof and pressure relief device for tap-changer protection, including: Shell: Made of high-strength, high-temperature-resistant and explosion-proof materials, used to protect internal components and withstand external impacts. A pressure relief pipe is connected to the shell; Pressure release mechanism: It is installed inside the shell and connected to the internal space of the tap changer. It is used to monitor the internal pressure of the tap changer and release the pressure when the pressure exceeds the threshold; Explosion-proof mechanism: Located inside the housing, surrounding the tap changer, made of multiple layers of explosion-proof materials, used to withstand explosion impact and prevent flame spread; Backflow prevention mechanism: It is installed at the outlet of the pressure relief pipe to prevent the backflow of external air.

[0007] By adopting the above technical solution, the pressure of the tap changer is monitored and released through the pressure release mechanism, so that the pressure can be released in a timely and effective manner when the internal pressure of the tap changer increases. At the same time, the interior is protected by the explosion-proof mechanism, so that the device has good explosion-proof performance and prevents the occurrence of explosion accidents. A backflow prevention mechanism is provided to block the backflow of discharged gas and liquid, and at the same time prevent the backflow of external air after pressure release.

[0008] Preferably, the pressure release mechanism includes a pressure sensor, a control unit and a release valve, and the control unit controls the operation of the release valve and the pressure sensor.

[0009] By adopting the above technical solution, the pressure sensor monitors the pressure changes inside the tap changer in real time and transmits the pressure signal to the control unit. When the pressure exceeds the preset threshold, the control unit immediately activates the release valve to quickly discharge the high-pressure gas and liquid inside the tap changer, thereby completing the pressure release of the tap changer and protecting the tap changer.

[0010] Preferably, the valve port of the release valve adopts a conical design, and the release valve is arranged inside the pressure relief pipe.

[0011] By adopting the above technical solution, the release valve adopts a special conical valve port design with a large flow area, which can achieve rapid and large-flow pressure release. When opening, it can effectively reduce fluid resistance and ensure high efficiency of pressure release.

[0012] Preferably, the multi-layer explosion-proof material of the explosion-proof mechanism includes explosion-proof ceramics, metal wire mesh and flame-retardant fibers.

[0013] By adopting the above technical solutions, explosion-proof ceramics can withstand the high pressure and high temperature impact generated by the explosion, preventing the explosion energy from directly impacting the outer shell. The wire mesh further absorbs and disperses the explosion energy while preventing the spread of flames. The flame-retardant fiber can remain stable in a high temperature environment, preventing the occurrence and spread of fire. The combined use of multiple layers of explosion-proof materials greatly improves the explosion-proof performance of the device.

[0014] Preferably, the backflow prevention mechanism includes a one-way valve and a filter device, and the one-way valve and the filter device are both installed at the outlet of the pressure relief pipe.

[0015] By adopting the above technical solution, the one-way valve ensures that external air cannot flow back into the tap changer after pressure is released. The one-way valve adopts a special sealing structure that can open quickly when pressure is released and close immediately after the pressure release is completed to prevent air backflow. The filter device is used to filter impurities in the gas and liquid discharged during the pressure release process to prevent these impurities from polluting the environment.

[0016] Preferably, the filtering device uses activated carbon and fiber filter as filtering materials.

[0017] By adopting the above technical solution, the filter device uses high-efficiency filter materials, such as activated carbon and fiber filter, which can effectively remove harmful substances in the gas and particulate impurities in the liquid.

[0018] Preferably, an auxiliary release mechanism is provided on the outside of the shell for releasing the pressure of the tap changer after the shell explodes. The auxiliary release mechanism includes a protective shell and an auxiliary release component. The protective shell is provided on the outside of the shell, and the auxiliary release component is provided on the protective shell.

[0019] By adopting the above technical solution, a protective shell is provided outside the outer shell in combination with an auxiliary release component. When the pressure inside the tap changer is still too high after the outer shell explodes and the pressure needs to be further released, gas or liquid is released into the protective shell. The pressure inside the protective shell increases, and the gas or liquid pushes the auxiliary release component upward to release the gas or liquid, thereby reducing the internal pressure of the tap changer and protecting the tap changer. At the same time, when the outer shell explodes, the protective shell can intercept the liquid splashed during the explosion, reduce liquid splashing, and protect the tap changer.

[0020] Preferably, the auxiliary release assembly includes a filter, a first spring of a cover plate and a guide column; the filter is arranged at the top of the inside of the protective shell, the filter is composed of a fiber filter and activated carbon, the cover plate is arranged at the exhaust port of the protective shell, the first spring is arranged at the bottom of the cover plate, and the top end of the guide column is connected to the cover plate; the guide column is slidably connected to the protective shell.

[0021] By adopting the above technical solution, after the outer shell explodes, the internal pressure of the tap changer is still too high. When the pressure needs to be further released, the gas or liquid is released into the protective shell, the pressure in the protective shell increases, and the gas or liquid pushes the cover plate upward, so that the gas and liquid are filtered through the filter mesh, and then the gas or liquid is released to reduce the internal pressure of the tap changer, thereby protecting the tap changer. At the same time, the fiber filter and activated carbon are combined together to achieve the dual effects of physical filtration and chemical adsorption. The fiber filter mesh is first used for coarse filtration to intercept large particles, and then the activated carbon is used to adsorb harmful gases and odors in the air, thereby more comprehensively purifying the air, improving the filtration effect, and reducing pollution to the environment.

[0022] Preferably, a mounting mechanism is provided on the outer side of the shell, and the mounting mechanism is provided on the tap changer, and the mounting mechanism includes a support plate, and a pull column is slidably connected to the support plate; the pull column is connected to a cone block at one end close to the shell, and a second spring is provided on the surface of the pull column, and a clamping rod is connected to the pull column; the clamping rod is slidably connected to the support plate, and a clamping slot for cooperating with the clamping rod is provided on the shell, and the top hinge of the support plate is connected to a limit rod for limiting the shell.

[0023] By adopting the above technical solution, the limit rod is manually moved to disengage the limit rod from the explosion-proof and pressure release integrated device, and then the pull column is pulled to disengage the clamping rod and the cone block from the explosion-proof and pressure release integrated device, and then the explosion-proof and pressure release integrated device is removed, and the explosion-proof and pressure release integrated device is inspected and replaced, which is convenient for users to quickly install and disassemble, and convenient for inspecting and replacing the explosion-proof and pressure release integrated device.

[0024] Preferably, the outer shell and the protective shell are both made of special alloy steel.

[0025] By adopting the above technical solution, the outer shell and protective shell are made of high-strength, high-temperature resistant and explosion-proof materials, such as special alloy steel, which has good mechanical properties and explosion-proof properties and can withstand high-voltage shocks that may be generated inside the tap changer.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. Through precise control of the pressure sensor and control unit, the release valve can quickly open when the pressure inside the tap changer exceeds the threshold, achieving rapid and high-flow pressure release, effectively reducing the pressure inside the tap changer and avoiding explosion accidents caused by high pressure; 2. The explosion-proof structure composed of multiple layers of explosion-proof materials can withstand the high pressure and high temperature impact generated by the explosion, absorb and disperse the explosion energy, and prevent the spread of flames, greatly improving the explosion-proof performance of the device and protecting the safety of the tap changer and surrounding equipment; 3. The one-way valve and filter device in the backflow prevention mechanism can not only prevent external air from flowing back into the tap changer to avoid secondary accidents, but also filter the gas and liquid discharged during the pressure release process to reduce pollution to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is the structural diagram of the connection between the explosion-proof and pressure relief integrated device and the tap changer; Figure 2 It is a cross-sectional view of the auxiliary release mechanism of the explosion-proof and pressure-releasing integrated device; Figure 3 This is a cross-sectional view of the integrated explosion-proof and pressure relief device in conjunction with the tap changer; Figure 4 This is a cross-sectional structural diagram of an integrated explosion-proof and pressure-releasing device; Figure 5 is a schematic structural diagram of an auxiliary release component of an auxiliary release mechanism; Figure 6 It is a schematic diagram of the installation structure of the filtering device; Figure 7 yes Figure 4 Enlarged view of point A in the middle; Figure 8 yes Figure 3 Enlarged view of point B in the middle.

[0028] Figure numerals: 100, tap changer; 200, housing; 210, pressure relief pipe; 300, pressure release mechanism; 310, pressure sensor; 320, control unit; 330, release valve; 400, explosion-proof mechanism; 500, backflow prevention mechanism; 510, one-way valve; 520, filter device; 521, mounting plate; 522, fixing bolt; 600, auxiliary release mechanism; 610, protective shell; 620, auxiliary release assembly; 621, filter screen; 622, cover plate; 623, first spring; 624, guide column. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1 -Attached Figure 8 This application is described in further detail.

[0030] The embodiment of the present application discloses an integrated explosion-proof and pressure-releasing device for tap changer protection.

[0031] Reference Figure 1 、 Figure 2 and Figure 3An integrated explosion-proof and pressure-releasing device for tap-changer protection includes a housing 200 made of special alloy steel, a pressure-releasing mechanism 300 for monitoring the internal pressure of the tap-changer and releasing pressure when the pressure exceeds a threshold, an explosion-proof mechanism 400 composed of multiple layers of explosion-proof material for withstanding explosion shock and preventing flame propagation, a backflow prevention mechanism 500 for preventing backflow of external air and exhaust gas or liquid, and an auxiliary release mechanism 600 for continuing to release pressure in the tap-changer 100 after the housing 200 explodes. The housing 200 is mounted on the tap-changer 100. The pressure release mechanism 300 is mounted inside the housing 200 and communicates with the interior space of the tap changer 100. The explosion-proof mechanism 400 is mounted on the inner wall of the housing 200 and is located within the explosion-proof mechanism 400. A pressure relief pipe 210 is connected to the housing 200 and cooperates with the pressure release mechanism 300. The backflow prevention mechanism 500 is mounted at the outlet of the pressure relief pipe 210 to block and intercept external air to prevent backflow. The auxiliary release mechanism 600 is mounted on the outer side 320 of the housing 200 to provide auxiliary protection for the tap changer 100. The pressure release mechanism 300 monitors and releases pressure from the tap changer 100. When the internal pressure of the tap changer 100 increases, the pressure can be released promptly and effectively, thereby protecting the tap changer 100 and reducing the risk of explosion. Furthermore, the explosion-proof mechanism 400 protects the interior of the device, providing excellent explosion-proof performance and preventing explosion accidents. Furthermore, a backflow prevention mechanism 500 is provided to block the backflow of discharged gas and liquid, thereby preventing the backflow of external air after pressure release.

[0032] Reference 3 and Figure 4 The pressure release mechanism 300 includes a pressure sensor 310, a control unit 320, and a release valve 330. The pressure sensor 310 is installed inside the tap changer 100, the control unit 320 is installed on the tap changer 100, and the release valve 330 is installed in the pressure relief pipe 210 on the housing 200. The valve port of the release valve 330 adopts a conical design. The control unit 320 is electrically connected to the release valve 330 and the pressure sensor 310. The pressure sensor 310 senses the pressure change in the tap changer 100, so that the control unit 320 controls the release valve 330 to start, thereby releasing the pressure in the tap changer 100, reducing the pressure in the tap changer 100, and protecting the tap changer 100. At the same time, the release valve 330 adopts a special conical valve port design, which has a large flow area, can achieve rapid and large-flow pressure release, can effectively reduce fluid resistance when opened, and ensure high efficiency of pressure release. The multi-layer explosion-proof material of the explosion-proof mechanism 400 includes explosion-proof ceramics, metal mesh, and flame-retardant fibers. The explosion-proof ceramics, metal mesh, and flame-retardant fibers are installed one by one on the inner side of the shell, so that the explosion-proof ceramics, metal mesh, and flame-retardant fibers form an integrated protection. The explosion-proof ceramics can withstand the high pressure and high temperature impact generated by the explosion, preventing the explosion energy from directly impacting the shell 200. The metal mesh further absorbs and disperses the explosion energy while preventing the spread of flames. The flame-retardant fibers can remain stable in high-temperature environments, preventing the occurrence and spread of fire. The combined use of multiple layers of explosion-proof materials greatly improves the explosion-proof performance of the device. The backflow prevention mechanism 500 includes a one-way valve 510 and a filter device 520. The one-way valve 510 is installed in the pressure relief pipe 210. The internal structure of the one-way valve 510 adopts a special sealing structure, so that the one-way valve 510 can only flow in one direction. The filter device 520 is installed at the outlet of the pressure relief pipe 210. The one-way valve 510 is located between the release valve 330 and the filter device 520. Through the cooperation of the one-way valve 510 and the filter device 520, the discharged gas or liquid and the outside air are blocked to prevent the discharged gas or liquid and the outside air from entering the outer shell 200, preventing the gas or liquid and the outside air from backflowing and affecting the operation of the device. At the same time, the filter device 520 filters the discharged gas or liquid to reduce harmful substances in the gas and liquid, thereby reducing pollution to the environment.

[0033] refer to Figure 4 and Figure 5 , the auxiliary release mechanism 600 includes a protective shell 610 and an auxiliary release assembly 620, the protective shell 610 is installed on the outer side 320 of the shell 200 to protect the shell 200, and the auxiliary release assembly 620 is installed on the protective shell 610; wherein the auxiliary release assembly 620 includes a filter 621, a cover plate 622, a first spring 623 and a guide column 624, the filter 621 is installed on the top of the inside of the shell 200, one end of the first spring 623 is fixedly connected to the protective shell 610, and the other end of the first spring 623 is fixedly connected to the cover plate 622, the cover plate 622 is arranged above the filter 621, and the bottom of the cover plate 622 is fixedly connected to the guide column 624; the guide The column 624 is slidably connected to the protective shell 610; after the shell 200 explodes, the shell 200 leaks gas or liquid to the outside, increasing the pressure in the protective shell 610. When the pressure in the protective shell 610 is too high, the cover plate 622 is pushed upward, allowing the gas or liquid to be discharged upward through the filter 621, so that the tap changer 100 can continue to release pressure, thereby improving the protection effect of the tap changer 100 and reducing the impact on the tap changer 100. At the same time, when the shell 200 explodes, pressure is also generated, causing the pressure in the protective shell 610 to increase sharply, causing the cover plate 622 to move upward, releasing the pressure in the protective shell 610, thereby effectively reducing the explosion of the protective shell 610. The filter 621 is composed of a fiber filter and activated carbon. By combining the fiber filter and activated carbon, it can achieve the dual effects of physical filtration and chemical adsorption. The fiber filter first performs coarse filtration to intercept large particles, and then the activated carbon absorbs harmful gases and odors in the air, thereby more comprehensively purifying the air, improving the filtration effect, and reducing pollution to the environment. The materials of the protective shell 610 and the outer shell 200 are both made of a special material, alloy steel; alloy steel has high strength and hardness, which enables the protective shell 610 and the outer shell 200 to withstand large external force impact and pressure without being easily deformed or damaged. This allows the protective shell 610 and the outer shell 200 to provide reliable protection for the internal equipment or items, effectively prevent internal components from being damaged, and extend their service life.

[0034] refer to Figure 6 and Figure 7 The filter device 520 includes a mounting plate 521, fixing bolts 522, and activated carbon and fiber filter screens as filter materials. The filter device 520 is installed at the outlet of the pressure relief pipe 210 through the mounting plate 521 and the fixing bolts 522, so that the activated carbon and fiber filter screen are located in the pressure relief pipe 210 to filter the discharged gas or liquid and reduce air pollution.

[0035] refer to Figure 8 The tap changer 100 is connected to a hydraulic mounting mechanism 700, which includes a support plate 710, a pull column 720, a cone block 730, a second spring 740, a clamping rod 750, and a limit rod 760. The bottom of the support plate 710 is fixedly connected to the tap changer 100. Two through holes are provided on the support plate 710. The clamping rod 750 and the pull column 720 are respectively located in the two through holes. One end of the clamping rod 750 is fixedly connected to the pull column 720, and the end of the pull column 720 close to the device is fixedly connected to the cone block 730. The second spring 740 is sleeved on the edge of the pull column 720 and is located between the support plate 710 and the cone block 730. The locking rod 750 is fixed on the device, and the bottom of the limiting rod 760 is hinged to the support plate 710. The hinge force between the support plate 710 and the limiting rod 760 is large, and manual adjustment of the position is required. By manually bending the limiting rod 760, the limiting rod 760 is separated from the explosion-proof and pressure release integrated device, and then the pulling column 720 is pulled to separate the locking rod 750 and the cone block 730 from the explosion-proof and pressure release integrated device, and then the explosion-proof and pressure release integrated device is removed, and the explosion-proof and pressure release integrated device is inspected and replaced, which is convenient for users to quickly disassemble and inspect and replace the explosion-proof and pressure release integrated device.

[0036] The implementation principle of the embodiment of the present application is as follows: During implementation, the control unit 320 controls the pressure sensor 310 to sense the pressure within the tap changer 100. When the pressure within the tap changer 100 exceeds the warning value on the control unit 320, the control unit 320 controls the release valve 330 to open, allowing liquid or gas to pass through the housing 200 and be discharged from the pressure relief pipe 210 to release the pressure. Before being discharged, the gas or liquid passes through the one-way valve 510 to the filter device 520 for filtration, so that harmful substances in the gas or liquid are filtered and removed, and then discharged from the pressure relief pipe 210. Under the action of the one-way valve 510, the discharged gas or liquid is blocked outside to prevent the gas or liquid from flowing back, thereby releasing the internal pressure of the tap changer 100, preventing the gas or liquid released from the tap changer 100 from flowing back, and protecting the tap changer 100. The filter device 520 filters and absorbs the passing gas or liquid, reducing the emission of harmful substances and protecting the environment. In practice, the internal pressure of the tap changer 100 is very high. When the pressure release mechanism 300 fails to release the pressure, the housing 200 may explode. The explosion-proof ceramic, wire mesh, and flame-retardant fiber on the explosion-proof mechanism 400 prevent the liquid from splashing. The wire mesh further absorbs and disperses the explosion energy, while preventing the spread of flames. The flame-retardant fiber can remain stable in high-temperature environments, preventing the occurrence and spread of fire. The combination of multiple layers of explosion-proof materials greatly improves the explosion-proof performance of the device. During implementation, when the housing 200 explodes, the protective shell 610 blocks the exploded housing 200, reducing the direct entry of liquid or gas into the air and reducing damage to surrounding equipment caused by the liquid. At the same time, the impact force of the explosion of the housing 200 is moved upward by the cover plate 622 on the auxiliary release assembly 620 on the protective shell 610, so that the impact pressure is released from the cover plate 622, reducing the probability of explosion of the protective shell 610 and protecting surrounding equipment. In practice, after the outer shell 200 explodes, if the tap changer 100 still needs to release pressure, gas or liquid enters the protective shell 610 and passes through the filter 621 to the bottom of the cover plate 622, causing the gas or liquid to pressurize the cover plate 622, causing the cover plate 622 to move upward, thereby allowing the gas or liquid to be discharged from the top of the protective shell 610, further releasing pressure on the tap changer 100 and protecting the tap changer 100. During implementation, after the explosion-proof and pressure-releasing integrated device explodes and is damaged, the user moves the limit rod 760 to separate one end of the limit rod 760 from the explosion-proof and pressure-releasing integrated device, and then pulls the pull column 720 on the support plate 710. The pull column 720 drives the cone block 730 and the clamping rod 750 to move, so that the cone block 730 and the clamping rod 750 are separated from the explosion-proof and pressure-releasing integrated device, and then removes the explosion-proof and pressure-releasing integrated device for replacement. During installation, the user aligns and presses the explosion-proof and pressure-releasing integrated device downward to The integrated explosion-proof and pressure release device drives the cone block 730 to move, the cone block 730 drives the pull column 720 to move, the pull column 720 drives the clamping rod 750 to move, and then when the connecting block on the integrated explosion-proof and pressure release device is located at the bottom of the cone block 730, under the action of the second spring 740, the cone block 730 and the clamping rod 750 are reset, the clamping rod 750 is stuck in the integrated explosion-proof and pressure release device, and then the limit rod 760 is reset, so that the integrated explosion-proof and pressure release device is installed, achieving the purpose of quick disassembly and installation.

[0037] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An integrated explosion-proof and pressure-releasing device for tap-changer protection, characterized in that: include: The housing (200) is made of a high-strength, high-temperature-resistant and explosion-proof material, and is used to protect internal components and withstand external impacts. A pressure relief pipe (210) is connected to the housing (200); A pressure release mechanism (300) is provided inside the housing (200) and communicates with the internal space of the tap changer (100), and is used to monitor the internal pressure of the tap changer (100) and release the pressure when the pressure exceeds a threshold value; Explosion-proof mechanism (400): located inside the housing (200), surrounding the tap changer (100), and composed of multiple layers of explosion-proof material, used to withstand explosion impact and prevent flame propagation; Backflow prevention mechanism (500): provided at the outlet of the pressure relief pipe (210), for preventing backflow of external air.

2. The integrated explosion-proof and pressure-releasing device for tap changer protection according to claim 1, characterized in that: The pressure release mechanism (300) comprises a pressure sensor (310), a control unit (320) and a release valve (330), wherein the control unit (320) controls the operation of the release valve (330) and the pressure sensor (310).

3. The integrated explosion-proof and pressure-releasing device for tap-changer protection according to claim 2, characterized in that: The valve port of the release valve (330) adopts a conical design, and the release valve (330) is arranged inside the pressure relief pipe (210).

4. The integrated explosion-proof and pressure-releasing device for tap changer protection according to claim 1, characterized in that: The multi-layer explosion-proof material of the explosion-proof mechanism (400) comprises explosion-proof ceramics, metal wire mesh and flame-retardant fibers.

5. The integrated explosion-proof and pressure-releasing device for tap-changer protection according to claim 1, characterized in that: The backflow prevention mechanism (500) comprises a one-way valve (510) and a filter device (520), and both the one-way valve (510) and the filter device (520) are installed at the outlet of the pressure relief pipe (210).

6. The integrated explosion-proof and pressure-releasing device for tap-changer protection according to claim 5, characterized in that: The filtering device (520) uses activated carbon and fiber filter as filtering materials.

7. The integrated explosion-proof and pressure-releasing device for tap-changer protection according to claim 1, characterized in that: An auxiliary release mechanism (600) is provided on the outside of the housing (200) for releasing the pressure of the tap changer (100) after the housing (200) explodes. The auxiliary release mechanism (600) comprises a protective shell (610) and an auxiliary release assembly (620). The protective shell (610) is provided on the outside of the housing (200), and the auxiliary release assembly (620) is provided on the protective shell (610).

8. The integrated explosion-proof and pressure-releasing device for tap-changer protection according to claim 7, characterized in that: The auxiliary release assembly (620) includes a filter (621), a cover (622), a first spring (623) and a guide column (624); the filter (621) is arranged at the top of the inner side of the protective shell (610), and the filter (621) is composed of a fiber filter and activated carbon. The cover (622) is arranged at the exhaust port of the protective shell (610), the first spring (623) is arranged at the bottom of the cover (622), and the top end of the guide column (624) is connected to the cover (622); the guide column (624) is slidably connected to the protective shell (610).

9. The integrated explosion-proof and pressure-releasing device for tap-changer protection according to claim 1, characterized in that: A mounting mechanism (700) is provided on the outer side of the housing (200), and the mounting mechanism (700) is provided on the tap changer (100). The mounting mechanism (700) includes a support plate (710), and a pull column (720) is slidably connected to the support plate (710); an end of the pull column (720) close to the housing (200) is connected to a cone block (730), a second spring (740) is sleeved on the surface of the pull column (720), and a clamping rod (750) is connected to the pull column (720); the clamping rod (750) is slidably connected to the support plate (710), a clamping slot for use with the clamping rod (750) is provided on the housing (200), and a limit rod (760) for limiting the housing (200) is hingedly connected to the top of the support plate (710).

10. The integrated explosion-proof and pressure-releasing device for tap-changer protection according to claim 7, characterized in that: The outer shell (200) and the protective shell (610) are both made of special alloy steel.

Images