Intelligent pressure relief device for releasing internal pressure of switch cabinet

Abstract

The utility model relates to the technical field of switch cabinet pressure relief, in particular to an intelligent pressure relief device for releasing pressure in a switch cabinet, which comprises a pressure relief cylinder mounted in the switch cabinet, the pressure relief cylinder comprises a cylinder body, a pressure relief valve and an air pump, the pressure relief valve and the air pump are arranged in the cylinder body, and the pressure relief valve comprises a movable plate and a fixed plate. The movable plate is slidably installed in the cylinder, the fixed plate is fixedly installed in the cylinder, the movable plate is located on the front side of the fixed plate, an air inlet is formed in the front end of the cylinder, a pressure relief pipe is installed on the cylinder, one end of the pressure relief pipe is communicated with the interior of the cylinder, and the other end of the pressure relief pipe is communicated with the interior of the cylinder. And the other end of the pressure relief pipe is communicated with the air inlet end of the air pump. When the air pressure in the switch cabinet is increased sharply, the air pressure pushes the moving plate to slide along the cylinder body, so that the air enters the pressure relief pipe, and the air is pumped out from the interior of the switch cabinet by the air pump, so that the air in the switch cabinet is rapidly discharged, and the pressure in the switch cabinet is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a switchgear pressure relief technical field, concretely is a kind of intelligent pressure relief device for switchgear internal pressure release. BACKGROUND

[0002] Switchgear is widely used in power system, in actual operation, due to insulation aging, misoperation, foreign matter and overvoltage etc. cause internal fault arc accident to occur, arc burns in short time release huge energy, cause cabinet internal gas to expand, pressure to increase suddenly, can lead to cabinet to appear burst under strong pressure, even cause fire.

[0003] The existing pressure relief device is often fixed by one-off plastic screw to the pressure relief plate, when high-pressure gas is generated in the switch cabinet, the high-pressure gas will flush the pressure relief plate, at this time, the pressure relief port is opened, and pressure relief is carried out, but the pressure relief device cannot quickly discharge the high-pressure gas in the switch and cannot be reused. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of intelligent pressure relief device for switchgear internal pressure release to solve the problems raised in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A kind of intelligent pressure relief device for switchgear internal pressure release, including the pressure relief cylinder installed in switchgear interior, the pressure relief cylinder includes cylinder body and the pressure relief valve and air pump being arranged in the cylinder body interior, the pressure relief valve includes moving plate and fixed plate, the moving plate is slidably installed in the cylinder body interior, the fixed plate is fixedly installed in the cylinder body interior, moving plate is located the front side of fixed plate, the front end of the cylinder body is provided with air inlet, the pressure relief pipe is installed on the cylinder body, one end of the pressure relief pipe is communicated with the interior of the cylinder body, the other end of the pressure relief pipe is communicated with the air inlet end of the air pump.

[0007] As a further scheme of the utility model: the rear side of the moving plate is fixedly installed with push rod, and the first reset spring is sleeved on the rod segment between the moving plate and the fixed plate, the fixed plate is provided with locking mechanism for locking the position of the moving plate.

[0008] As a further scheme of the utility model: the cylinder body interior is provided with sliding groove, the rod segment of the push rod on the outer side of the fixed plate is slidably installed in the sliding groove, the sliding groove is provided with control switch, and the control switch is electrically connected with the air pump.

[0009] As a further scheme of the utility model: the air pump is provided with exhaust pipe at the exhaust end, and the exhaust pipe is used for discharging the gas in the switch cabinet.

[0010] As a further scheme of the utility model: the locking mechanism includes several air outlet pipes installed on the fixed plate, the air outlet pipe is communicated with the elastic air bag, the elastic air bag is umbrella structure, the movable plate is equipped with locking hole matched with the elastic air bag.

[0011] As a further scheme of the utility model: the front side of the pressure relief cylinder is equipped with several first air inlet holes, the fixed plate is equipped with second air inlet hole matched with the first air inlet hole, the first air inlet hole is communicated with the second air inlet hole through the pipeline built in the lateral wall of the cylinder body, and the second air inlet hole is communicated with the air outlet pipe.

[0012] As a further scheme of the utility model: the movable plate is equipped with sealing plug on the locking hole, the movable plate is fixedly installed with several guide rods on the outside, the sealing plug is slidably installed on the guide rod, and the sealing plug is connected with one end of the guide rod through the second reset spring sleeved on the guide rod.

[0013] Compared with the prior art, the utility model has the beneficial effects that: the utility model is installed in the switch cabinet by the pressure relief cylinder, the pressure relief cylinder includes cylinder body, pressure relief valve and air pump, when the switch cabinet internal gas pressure surges, the gas pressure drives the movable plate to slide along the cylinder body, makes the gas enter the pressure relief pipe inside, and the gas is pumped out from the switch cabinet inside by the air pump, thereby the gas in the switch cabinet inside is discharged quickly, and the switch cabinet internal pressure is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is structural schematic diagram of intelligent pressure relief device for releasing the pressure in switch cabinet.

[0015] Figure 2 It is partial section view of intelligent pressure relief device for releasing the pressure in switch cabinet Figure One .

[0016] Figure 3 It is partial section view of intelligent pressure release device for releasing the pressure in switch cabinet Figure Two .

[0017] Figure 4 It is structural schematic of pressure relief valve in intelligent pressure relief device for releasing the pressure in switch cabinet Figure One .

[0018] Figure 5 It is structural schematic of pressure relief valve in intelligent pressure relief device for releasing the pressure in switch cabinet Figure Two .

[0019] In the figure: 10 - pressure relief cylinder, 11 - mounting seat, 12 - first air inlet hole, 13 - pressure relief pipe, 14 - control switch, 15 - air pump, 16 - exhaust pipe, 20 - pressure relief valve, 21 - moving plate, 22 - fixed plate, 23 - push rod, 231 - first reset spring, 24 - air outlet pipe, 25 - elastic air bag, 26 - sealing plug, 27 - second reset spring, 28 - locking hole, 29 - second air inlet hole. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0021] Please refer to Figures 1-5 In the embodiments of the utility model, an intelligent pressure relief device for releasing pressure inside a switch cabinet comprises a pressure relief cylinder 10 installed inside the switch cabinet. The switch cabinet is prior art, and the present embodiment will not be described here. The tail of the pressure relief cylinder 10 is provided with a mounting seat 11, which is used to install the pressure relief cylinder 10 on the switch cabinet. The pressure relief cylinder 10 comprises a cylinder body and a pressure relief valve 20 and an air pump 15 arranged inside the cylinder body. The pressure relief valve 20 comprises a moving plate 21 and a fixed plate 22. The moving plate 21 is slidingly installed inside the cylinder body, and the fixed plate 22 is fixedly installed inside the cylinder body. The moving plate 21 is located at the front side of the fixed plate 22. The front end (left end in the figure) of the cylinder body is provided with an air inlet. The cylinder body is provided with a pressure relief pipe 13. One end of the pressure relief pipe 13 is in communication with the inside of the cylinder body, and the other end of the pressure relief pipe 13 is in communication with the air inlet end of the air pump 15. When the air pressure inside the switch cabinet increases sharply, the air pressure pushes the moving plate 21 to slide along the cylinder body, so that the gas enters the inside of the pressure relief pipe 13 and is pumped out from the inside of the switch cabinet by the air pump 15. It should be noted that in the initial state, the air inlet position of the pressure relief pipe 13 is located at the rear side of the moving plate 21. After the air pressure pushes the moving plate 21 to slide along the cylinder body, the moving plate 21 moves to the rear side of the air inlet of the pressure relief pipe 13, so that the gas is discharged from the pressure relief pipe 13.

[0022] Further, in the embodiments of the present application, the rear side of the moving plate 21 is fixedly provided with a push rod 23. The push rod 23 is sleeved with a first reset spring 231 on the rod segment between the moving plate 21 and the fixed plate 22. The fixed plate 22 is provided with a locking mechanism for locking the position of the moving plate 21. After the air pressure pushes the moving plate 21 to slide along the cylinder body, the locking mechanism locks the position of the moving plate 21, so that the gas flows to the pressure relief pipe 13.

[0023] Further, in the embodiment of the present application, the inner part of the barrel is provided with a sliding groove, the rod segment of the push rod 23 outside the fixed plate 22 is slidingly installed in the sliding groove, the sliding groove is provided with a control switch 14, the control switch 14 is electrically connected with the air pump 15, when the air pressure pushes the moving plate 21 to slide along the barrel, the push rod 23 extrudes the control switch 14, so that the control switch 14 is closed, after the control switch 14 is closed, the air pump 15 is started, the air pump 15 draws out the gas in the inner part of the barrel through the pressure relief pipe 13, it should be noted that the control switch 14 is an elastic switch, the control switch 14 is automatically reset after losing pressure; the exhaust end of the air pump 15 is provided with an exhaust pipe 16, the exhaust pipe 16 is used for exhausting the gas in the inner part of the switch cabinet.

[0024] In the embodiment of the present application, the locking mechanism includes a plurality of air outlet pipes 24 installed on the fixed plate 22, the air outlet pipes 24 are communicated with elastic air bags 25, the elastic air bags 25 are umbrella-shaped structures, the moving plate 21 is provided with locking holes 28 matched with the elastic air bags 25; the front side of the pressure relief barrel 10 is provided with a plurality of first air inlet holes 12, the fixed plate 22 is provided with second air inlet holes 29 matched with the first air inlet holes 12, the first air inlet holes 12 are communicated with the second air inlet holes 29 through pipelines built in the side wall of the barrel, the second air inlet holes 29 are communicated with the air outlet pipes 24, it can be understood that when the air pressure in the switch cabinet increases sharply, the gas enters the inner part of the elastic air bags 25 through the first air inlet holes 12 and the second air inlet holes 29 and the air outlet pipes 24, so that the elastic air bags 25 are inflated, in this process, the moving plate 21 moves towards the fixed plate 22, the elastic air bags 25 are inserted into the locking holes 28, so that the position of the moving plate 21 is locked, after the pressure relief is completed, the elastic air bags 25 are contracted, the moving plate 21 is reset under the action of the first reset spring 231;

[0025] Further, in the embodiment of the present application, the moving plate 21 is provided with a sealing plug 26 on the locking hole 28, the outer side of the moving plate 21 is fixedly installed with a plurality of guide rods, the sealing plug 26 is slidingly installed on the guide rods, and the sealing plug 26 is connected with one end of the guide rod through the second reset spring 27 sleeved on the guide rod, in the initial state, the sealing plug 26 is located in the locking hole 28, after the elastic air bag 25 is inserted into the locking hole 28, the sealing plug 26 is pushed out of the locking hole 28 by the elastic air bag 25, after the pressure relief is completed, the elastic air bag 25 is contracted, and the sealing plug 26 is reset.

[0026] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, the scope of the present application being defined by the claims appended hereto rather than by the above description, and all the changes which fall within the meaning and the scope of the equivalent elements of the claims are intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0027] Furthermore, it should be understood that although the present specification is described in terms of embodiments, not every embodiment according to the present specification needs to exhibit each and every characteristic specified in the present specification. The specification can also be described in terms of a single independent technical solution, but this does not mean that each embodiment only contains one independent technical solution. The specification is described in this way only for the sake of clarity, and a person skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by a person skilled in the art.

Claims

1. An intelligent pressure relief device for pressure relief inside a switchgear, characterized in that, The utility model provides a kind of pressure relief cylinder (10) comprising installation in switch cabinet inside, the pressure relief cylinder (10) includes cylinder body and the pressure relief valve (20) and air pump (15) being arranged in the cylinder body inside, the pressure relief valve (20) includes moving plate (21) and fixed plate (22), the moving plate (21) is slidably installed in the cylinder body, the fixed plate (22) is fixedly installed in the cylinder body, moving plate (21) is located in the front side of fixed plate (22), the front end of the cylinder body is provided with air inlet, the cylinder body is installed with pressure relief pipe (13), one end of the pressure relief pipe (13) is communicated with the inside of the cylinder body, the other end of pressure relief pipe (13) is communicated with the air inlet end of the air pump (15).

2. The intelligent pressure relief device for pressure relief inside a switchgear according to claim 1, characterized in that, The rear side of the moving plate (21) is fixedly installed with push rod (23), the push rod (23) is sleeved with first reset spring (231) on the rod segment between the moving plate (21) and the fixed plate (22), the fixed plate (22) is provided with locking mechanism for locking the position of the moving plate (21).

3. The intelligent pressure relief device for pressure relief inside a switchgear according to claim 2, characterized in that, The cylinder body is provided with a sliding groove inside, the rod segment of the push rod (23) outside the fixed plate (22) is slidably installed in the sliding groove, the sliding groove is provided with control switch (14) inside, and the control switch (14) is electrically connected with the air pump (15).

4. The intelligent pressure relief device for pressure relief inside a switchgear according to claim 3, characterized in that, The air pump (15) is provided with exhaust pipe (16) at the exhaust end, and the exhaust pipe (16) is used for discharging gas inside the switch cabinet.

5. The intelligent pressure relief device for pressure relief inside a switchgear according to claim 2, characterized in that, The locking mechanism includes a plurality of air outlet pipes (24) installed on the fixed plate (22), the air outlet pipes (24) are communicated with elastic air bag (25), the elastic air bag (25) is in umbrella structure, and the moving plate (21) is provided with locking hole (28) matched with the elastic air bag (25).

6. The intelligent pressure relief device for pressure relief inside a switchgear according to claim 5, characterized in that, The front side of the pressure relief cylinder (10) is provided with a plurality of first air inlet holes (12), the fixed plate (22) is provided with second air inlet hole (29) matched with the first air inlet hole (12), the first air inlet hole (12) is communicated with the second air inlet hole (29) through the pipeline built in the side wall of the cylinder body, and the second air inlet hole (29) is communicated with the air outlet pipe (24).

7. The intelligent pressure relief device for pressure relief inside a switchgear according to claim 6, characterized in that, The moving plate (21) is provided with sealing plug (26) on the locking hole (28), the outer side of the moving plate (21) is fixedly installed with a plurality of guide rods, the sealing plug (26) is slidably installed on the guide rod, and the sealing plug (26) is connected with one end of the guide rod through the second reset spring (27) sleeved on the guide rod.

Images