CN212991778U

CN212991778U - Environment-friendly gas-insulated intelligent power distribution cabinet

Info

Publication number: CN212991778U
Application number: CN202022193058.6U
Authority: CN
Inventors: 罗伟
Original assignee: Beijing Prisma Electric Technology Co ltd
Current assignee: Beijing Prisma Electric Technology Co ltd
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2021-04-16
Anticipated expiration: 2030-09-29

Abstract

The utility model relates to an environmental protection gas insulation intelligent power distribution cabinet, the intelligent power distribution cabinet comprises a cabinet body, the cabinet body is provided with the air chamber, the air tank is installed in the outside of air chamber, the air chamber is provided with a tub with the junction of air tank, it includes the pipe of pipe form to seal the pipe, the tail end of body is provided with body tail end confined diaphragm, the inside of air tank still is provided with the rupture membrane device that is used for breaking open the diaphragm, rupture membrane device includes the pipe of pipe form sleeve pipe, the sleeve pipe includes electric heating pipe, install the thermal-insulated pipe at electric heating pipe both ends respectively, sheathed tube inside is provided with the spring, thermal-insulated piston, the sheathed tube tail end is provided with the shelves pole, rupture membrane device is still including setting up the contact pin between thermal-. Environmental protection gas-insulated intelligent power distribution cabinet can effectively reduce because maintenance cost and the safe risk that the air chamber gas leakage caused through installing pressure switch, seal pipe and rupture of membranes device, gas tank additional, and the using value is high.

Description

Environment-friendly gas-insulated intelligent power distribution cabinet

Technical Field

The utility model relates to an environmental protection gas insulation intelligent power distribution cabinet belongs to intelligent power distribution cabinet technical field.

Background

The environment-friendly gas-insulated switch cabinet/power distribution cabinet is a group of cabinetsThe high-voltage switch equipment is arranged in a metal closed gas chamber filled with environment-friendly gas with rated pressure to be made into electrical equipment of an assembled interval type ring network power supply unit, the core element of the high-voltage switch equipment adopts a load switch or a circuit breaker, and the environment-friendly gas insulation is adopted to replace SF₆The (sulfur hexafluoride) gas insulation has the advantages of safe power supply, high reliability and environmental protection. At present, nitrogen gas or nitrogen-oxygen mixed gas or dry air is used as a main insulating medium to replace sulfur hexafluoride gas.

After the existing environment-friendly gas-insulated power distribution cabinet is used for a long time, the sealing structure is influenced by the regular maintenance or debugging, and in addition, the environmental-friendly gas-insulated power distribution cabinet is easy to slightly leak gas due to factors such as aging, collision and mechanical impact. And once the inside environmental protection gas of air chamber of environmental protection gas-insulated switch board reveals to a certain extent, can make the inside insulating environment of air chamber show the decline to there is the safety risk.

At present, a common method is that a sensor used for measuring the air pressure inside an air chamber is installed, once the air pressure inside the air chamber is reduced to a certain degree, an alarm or a warning can be sent out, then a worker can arrive at the site and inflate and pressurize the air chamber by using an air bottle to recover the normal insulation environment, the air leakage position is checked and whether the air chamber needs to be replaced or maintained or not is evaluated, the environment-friendly gas insulation power distribution cabinet is not powered off as far as possible during the checking, and the normal power supply requirement is guaranteed. If serious air leakage or large-area air leakage occurs, the air can be completely lost in a short time (for example, 1 hour) even if the air cylinder is used for inflating and pressurizing the air chamber, and in this case, power failure and maintenance are needed in time for ensuring the safety of power utilization. Generally, the probability of large-area air leakage of the environment-friendly gas-insulated power distribution cabinet which is used for about 5 years does not exceed 28%.

However, for some environment-friendly gas-insulated power distribution cabinets far away from a maintenance point, once gas leakage occurs and the air pressure in the air chamber reaches a warning value, even if an alarm is given, the maintenance personnel can arrive at the site for a required time (for example, 1-2 hours), in the time period, the insulation environment in the air chamber is remarkably reduced, the safety risk is rapidly increased, and the power utilization personnel need to evaluate the safety risk to determine whether power failure is needed; and the power failure is easy to bring large economic loss for industrial production. Therefore, there is a great need for an environmentally friendly gas insulated switchgear cabinet that can compensate for the above safety risks in a short time (e.g., 1-2 hours).

SUMMERY OF THE UTILITY MODEL

The utility model discloses not enough to prior art exists provides an environmental protection gas insulation intelligent power distribution cabinet, and concrete technical scheme is as follows:

an environment-friendly gas-insulated intelligent power distribution cabinet comprises a cabinet body, wherein the cabinet body is provided with a gas chamber, the outer side of the gas chamber is provided with a gas tank, and the gas tank is fixedly connected with the gas chamber; a sealing pipe is arranged at the joint of the air chamber and the air box, the sealing pipe comprises a circular pipe body, the tail end of the pipe body is provided with a diaphragm for sealing the tail end of the pipe body, the head end of the pipe body is communicated with the inner cavity of the air chamber, and the diaphragm is arranged inside the air box; the film breaking device is arranged in the gas box and comprises a circular-tube-shaped sleeve, the sleeve comprises an electric heating pipe and heat insulation pipes which are respectively arranged at two ends of the electric heating pipe, and the electric heating pipe is fixedly connected with the heat insulation pipes; a spring and a heat insulation piston are arranged in the sleeve, a stop rod is arranged at the tail end of the sleeve, the end part of the stop rod is fixedly connected with the tail end of the sleeve, the spring is arranged between the heat insulation piston and the stop rod, one end of the spring is fixedly connected with the tail end of the heat insulation piston, the other end of the spring is fixedly connected with the stop rod, and the stop rod is fixedly connected with the inner wall of the gas box; the membrane rupturing device further comprises a contact pin arranged between the heat insulation piston and the membrane, the tail end of the contact pin is fixedly connected with the head end of the heat insulation piston, and a conical needle head is arranged at the head end of the contact pin.

As an improvement of the technical scheme, the heat insulation piston is arranged in the electric heating pipe, a tin block is arranged at the junction of the heat insulation piston and the electric heating pipe, and the heat insulation piston is positioned between the tin block and the spring.

As an improvement of the technical scheme, a pressure switch used for controlling the starting and stopping of the electric heating pipe is installed inside the air chamber, and the pressure switch is connected with the electric heating pipe in series.

As an improvement of the technical scheme, a through hole matched with the head end of the pipe body is formed in the joint of the air chamber and the air box, and a step structure is arranged between the head end of the pipe body and the tail end of the pipe body.

As an improvement of the technical scheme, an insulating baffle plate used for shielding the through hole is arranged in the air chamber, the insulating baffle plate is fixedly connected with the inner wall of the air chamber, and a space is arranged between the insulating baffle plate and the through hole.

As an improvement of the technical scheme, a one-way valve communicated with the inner cavity of the air box is arranged on the outer side of the air box.

As an improvement of the technical scheme, a safety valve communicated with the inner cavity of the air box is arranged on the outer side of the air box.

Environmental protection gas-insulated intelligent power distribution cabinet can effectively reduce because air chamber leaks gas maintenance cost and the safe risk that causes, and the using value is high through installing pressure switch additional, sealing pipe and rupture of membranes device, gas tank.

Drawings

Fig. 1 is a schematic structural view of the environment-friendly gas-insulated intelligent power distribution cabinet of the present invention;

FIG. 2 is a schematic view of the interior of the air chamber of the present invention;

FIG. 3 is a schematic view of the membrane rupturing device according to the present invention during operation;

FIG. 4 is a schematic view of the membrane rupturing device of the present invention when not in operation;

FIG. 5 is a schematic structural view of the tube sealing device of the present invention;

fig. 6 is a schematic diagram of the electric heating tube and pressure switch connection circuit of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

As shown in fig. 1-5, the environment-friendly gas-insulated intelligent power distribution cabinet comprises a cabinet body 10, wherein the cabinet body 10 is provided with a gas chamber 11, and nitrogen gas of 0.15MPa is filled in the gas chamber 11; an air box 20 is arranged on the outer side of the air chamber 11, and the air box 20 is fixedly connected with the air chamber 11; a sealing pipe 30 is arranged at the joint of the air chamber 11 and the air tank 20, the sealing pipe 30 comprises a circular pipe body 31, a diaphragm 32 for sealing the tail end of the pipe body 31 is arranged at the tail end of the pipe body 31, the head end of the pipe body 31 is communicated with the inner cavity of the air chamber 11, and the diaphragm 32 is arranged inside the air tank 20; the inside of the gas box 20 is further provided with a membrane breaking device 50 for breaking the membrane 32, the membrane breaking device 50 comprises a tubular sleeve 51, the sleeve 51 comprises an electric heating pipe 511 and heat insulation pipes 512 respectively installed at two ends of the electric heating pipe 511, and the electric heating pipe 511 is fixedly connected with the heat insulation pipes 512; a spring 53 and a heat insulation piston 56 are arranged in the sleeve 51, a stop lever 52 is arranged at the tail end of the sleeve 51, the end of the stop lever 52 is fixedly connected with the tail end of the sleeve 51, the spring 53 is arranged between the heat insulation piston 56 and the stop lever 52, one end of the spring 53 is fixedly connected with the tail end of the heat insulation piston 56, the other end of the spring 53 is fixedly connected with the stop lever 52, and the stop lever 52 is fixedly connected with the inner wall of the gas box 20; the membrane rupturing device 50 further comprises a contact pin 54 arranged between the heat insulation piston 56 and the membrane 32, the tail end of the contact pin 54 is fixedly connected with the head end of the heat insulation piston 56, and the head end of the contact pin 54 is provided with a conical needle 55.

The gas tank 20 is filled with 0.2-0.3MPa of nitrogen gas. The heat insulation piston 56 and the heat insulation pipe 512 are made of heat insulation materials, such as bakelite. The diaphragm 32 can be made of a PVC film, a polyester film or an aluminum film, and the installation and sealing of the diaphragm 32 can be made of a hot melt adhesive or an epoxy adhesive.

When the membrane rupturing device 50 does not work, the heat insulation piston 56 is arranged inside the electric heating pipe 511, a tin block 57 made by soldering is arranged at the junction of the heat insulation piston 56 and the electric heating pipe 511, and the heat insulation piston 56 is positioned between the tin block 57 and the spring 53, as shown in fig. 4. Wherein, the tin block 57 can be replaced by tin-lead alloy, and the tin-lead alloy has the advantages of low melting point, high hardness and the like. The solder bump 57 formed after the soldering cooling is fixedly connected to the electric heating tube 511. Since the insulating piston 56 is fixed inside the electric heating tube 511, the insert pin 54 and the needle 55 are both located inside the sleeve 51.

When the nitrogen in the gas chamber 11 is completely lost, the membrane rupturing device 50 starts to work, and the specific principle is as follows:

as shown in fig. 2 and 6, a pressure switch 13 for controlling the start and stop of the electric heating tube 511 is installed inside the gas chamber 11, and the pressure switch 13 is connected in series with the electric heating tube 511.

The pressure switch 13 is an intelligent pressure switch of the Fushan City Asahi Yueyong rise valve Limited company. When the air pressure in the air chamber 11 is reduced to a set value (such as normal pressure), the pressure switch 13 is closed, the electric heating pipe 511 is electrified and heated, the electric heating pipe 511 is an electric heating pipe of Jiangsu Huahai metallurgical machinery equipment, Inc., the electric heating pipe 511 can be heated to 190 and 250 ℃ within 1-3 minutes, so that the tin block 57 is melted, the tin block 57 is not fixedly connected with the inner wall of the electric heating pipe 511, the heat insulation piston 56 can push the heat insulation piston 56 to move towards the direction close to the membrane 32 under the pushing of the compressed spring 53, the heat insulation piston 56 can drive the contact pin 54 to enable the needle 55 to extend out of the sleeve 51, and as shown in FIG. 3, the membrane 32 is finally poked through by the needle 55; then, the nitrogen gas filled in the gas tank 20 is continuously flushed into the inside of the gas chamber 11 through the broken seal pipe 30, so that the gas chamber 11 can recover a good insulation environment. At the next stage, if the air leakage position of the air chamber 11 is in a hole-shaped structure, the nitrogen filled by the air box 20 leaks from the air chamber 11 again, and the nitrogen in the air chamber 11 is completely lost for 18-36 h; if the air leakage position of the air chamber 11 is in a slit-shaped structure, the nitrogen filled by the air box 20 leaks from the air chamber 11 again, and the nitrogen in the air chamber 11 is completely lost for 2-5 hours; if the gas leakage position of the gas chamber 11 is a hole shape or a larger damaged area, the nitrogen gas filled by the gas tank 20 leaks from the gas chamber 11 again, and it takes less than 30min for the nitrogen gas inside the gas chamber 11 to completely run off. Consequently, if do not take place serious gas leakage or large tracts of land gas leakage, environmental protection gas-insulated intelligent power distribution cabinet relies on the nitrogen gas of gas tank 20 deposit in time to inflate for air chamber 11, can guarantee that air chamber 11 is in good insulating environment throughout in the short time (more than 2 hours), in this time quantum, need not right environmental protection gas-insulated intelligent power distribution cabinet carries out long-range outage operation, and maintenance personal has sufficient time to arrive at the trouble department, reduces cost of maintenance and safe risk.

If the on-off between the air chamber 11 and the air box 20 is realized by installing the electromagnetic valve, after multiple times of realization and customer feedback discovery: the high-voltage induction arc exists in the air chamber 11, and impacts the electromagnetic valve frequently for a long time, so that the electromagnetic valve is easily damaged by voltage impact. And finding out according to statistics and feedback: even if the electromagnetic valve is arranged on the outer side wall of the air chamber 11, after the electromagnetic valve is used for one year, the failure rate of the electromagnetic valve is 5.3%; after the electromagnetic valve is used for three years, the failure rate of the electromagnetic valve is 21.7 percent; because the failure rate of the installation of the electromagnetic valve is high, the communication between the air chamber 11 and the air box 20 is controlled by adopting the sealing pipe 30 and matching with the membrane breaking device 50; the sealing pipe 30 is matched with the membrane breaking device 50 for use, and the failure rate is 0 under the impact of 10 ten thousand times of 35KV high-voltage induction arcs. The traditional mechanical valve cannot be switched on or off in time. In this embodiment, through the cooperation of setting up pressure switch 13, seal pipe 30 and rupture of membranes device 50, in case the inside atmospheric pressure of air chamber 11 is less than the setting value, rupture of membranes device 50 can give the rupture of seal pipe 30 to make gas tank 20 in time supply nitrogen gas to air chamber 11 inside, thereby make air chamber 11 can resume good insulating environment in the short time.

Further, for convenient installation, as shown in fig. 2 and 5, a through hole 12 adapted to the head end of the pipe body 31 is provided at the connection between the air chamber 11 and the air tank 20, and a step structure is provided between the head end of the pipe body 31 and the tail end of the pipe body 31, so as to facilitate the sealing connection between the head end of the pipe body 31 and the area near the through hole 12 by using hot melt adhesive.

The needle 55 needs to be made of metal material to ensure the membrane rupture effect, so as to ensure the safety; further, as shown in fig. 2, an insulating baffle 14 for shielding the through hole 12 is disposed inside the air chamber 11, the insulating baffle 14 is fixedly connected to an inner wall of the air chamber 11, and a gap is disposed between the insulating baffle 14 and the through hole 12.

The insulating baffle 14 is made of bakelite, the needle 55 can be blocked from further advancing by the insulating baffle 14, and the insulating property of the insulating baffle 14 can also isolate other electrical equipment inside the needle 55 from contacting, so that electric arcs or short circuits are prevented.

As shown in fig. 1, to facilitate inflation of the interior of the air box 20; further, a one-way valve 60 communicated with the inner cavity of the air box 20 is arranged on the outer side of the air box 20. By connecting the charging connector with the one-way valve 60 and filling nitrogen into the inner cavity of the air box 20 through the charging connector, the one-way valve 60 can prevent the backflow during charging. Wherein, the one-way valve 60 is an FA one-way inflation valve of Asahi YueSheng valvetrain, Foshan City.

As shown in fig. 1, to improve safety; further, a safety valve 40 communicated with the inner cavity of the air box 20 is arranged on the outer side of the air box 20. Wherein, the safety valve 40 is selected from X5 type mechanical safety valve of Asahi YueSheng valv Limited in Fushan City. The safety valve 40 may have an explosion-proof limit of 0.5MPa, and when the pressure inside the air tank 20 exceeds the explosion-proof limit, the pressure is released at the safety valve 40.

In the above embodiment, by additionally installing the pressure switch 13, the seal pipe 30, the membrane breaking device 50 and the gas tank 20, even if the gas chamber 11 leaks gas slightly, once the gas pressure inside the gas chamber 11 is lower than a set value, the membrane breaking device 50 breaks the seal pipe 30, so that the gas tank 20 supplies nitrogen gas to the inside of the gas chamber 11 in time, and the gas chamber 11 can recover a good insulation environment in a short time; in this time quantum, need not right environmental protection gas-insulated intelligent power distribution cabinet carries out long-range outage operation, and maintenance personal has sufficient time to catch up to trouble department, reduces cost of maintenance and safe risk.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides an environmental protection gas insulation intelligent power distribution cabinet, includes the cabinet body (10), the cabinet body (10) is provided with air chamber (11), its characterized in that: an air box (20) is arranged on the outer side of the air chamber (11), and the air box (20) is fixedly connected with the air chamber (11); a sealing pipe (30) is arranged at the joint of the air chamber (11) and the air box (20), the sealing pipe (30) comprises a circular pipe body (31), a diaphragm (32) for sealing the tail end of the pipe body (31) is arranged at the tail end of the pipe body (31), the head end of the pipe body (31) is communicated with the inner cavity of the air chamber (11), and the diaphragm (32) is arranged inside the air box (20); the membrane breaking device (50) for breaking the membrane (32) is further arranged inside the air box (20), the membrane breaking device (50) comprises a circular-tube-shaped sleeve (51), the sleeve (51) comprises an electric heating pipe (511) and heat insulation pipes (512) respectively installed at two ends of the electric heating pipe (511), and the electric heating pipe (511) is fixedly connected with the heat insulation pipes (512); a spring (53) and a heat insulation piston (56) are arranged in the sleeve (51), a blocking rod (52) is arranged at the tail end of the sleeve (51), the end part of the blocking rod (52) is fixedly connected with the tail end of the sleeve (51), the spring (53) is arranged between the heat insulation piston (56) and the blocking rod (52), one end of the spring (53) is fixedly connected with the tail end of the heat insulation piston (56), the other end of the spring (53) is fixedly connected with the blocking rod (52), and the blocking rod (52) is fixedly connected with the inner wall of the air box (20); the membrane rupturing device (50) further comprises a contact pin (54) arranged between the heat insulation piston (56) and the membrane (32), the tail end of the contact pin (54) is fixedly connected with the head end of the heat insulation piston (56), and a conical needle head (55) is arranged at the head end of the contact pin (54).

2. The environment-friendly gas-insulated intelligent power distribution cabinet according to claim 1, characterized in that: the heat insulation piston (56) is arranged inside the electric heating pipe (511), a tin block (57) is arranged at the junction of the heat insulation piston (56) and the electric heating pipe (511), and the heat insulation piston (56) is located between the tin block (57) and the spring (53).

3. The environment-friendly gas-insulated intelligent power distribution cabinet according to claim 2, characterized in that: and a pressure switch (13) for controlling the starting and stopping of the electric heating pipe (511) is arranged in the air chamber (11), and the pressure switch (13) is connected with the electric heating pipe (511) in series.

4. The environment-friendly gas-insulated intelligent power distribution cabinet according to claim 1, characterized in that: the connecting part of the air chamber (11) and the air box (20) is provided with a through hole (12) matched with the head end of the pipe body (31), and a step structure is arranged between the head end of the pipe body (31) and the tail end of the pipe body (31).

5. The environment-friendly gas-insulated intelligent power distribution cabinet according to claim 4, characterized in that: the air chamber is characterized in that an insulating baffle (14) used for shielding the through hole (12) is arranged in the air chamber (11), the insulating baffle (14) is fixedly connected with the inner wall of the air chamber (11), and a space is arranged between the insulating baffle (14) and the through hole (12).

6. The environment-friendly gas-insulated intelligent power distribution cabinet according to claim 1, characterized in that: the outer side of the air box (20) is provided with a one-way valve (60) communicated with the inner cavity of the air box (20).

7. The environment-friendly gas-insulated intelligent power distribution cabinet according to claim 1, characterized in that: and a safety valve (40) communicated with the inner cavity of the air box (20) is arranged on the outer side of the air box (20).