CN223124405U - Pressure relief device of direct current switch cabinet - Google Patents
Pressure relief device of direct current switch cabinetInfo
- Publication number
- CN223124405U CN223124405U CN202422292791.1U CN202422292791U CN223124405U CN 223124405 U CN223124405 U CN 223124405U CN 202422292791 U CN202422292791 U CN 202422292791U CN 223124405 U CN223124405 U CN 223124405U
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- China
- Prior art keywords
- pressure relief
- switch cabinet
- cover plate
- top plate
- relief device
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Abstract
本实用新型公开了一种直流开关柜泄压装置，主要涉及开关电器技术领域，包括开关柜顶板、盖板和弹簧机构三者结合发挥作用，泄压后可自动复位。当无需泄压时，泄压盖板可盖住泄压孔，防止灰尘、滴水进入开关柜，造成短路等一系列问题。当开关柜内部压力增加时，可快速打开泄压盖板，泄压装置内部设置有气弹簧，可加快泄压盖板的打开速度，当泄压动作完成后，泄压盖板在重力作用下自动回复到原始状态，泄压装置内部的气弹簧，可降低泄压盖板的复位速度，使开关柜内部的泄压气体尽快排出，防止因泄压气体未完全排出而导致直流开关柜短路开断失败，提高直流开关柜的安全性与可靠性。
The utility model discloses a pressure relief device for a DC switch cabinet, which mainly relates to the technical field of switch electrical appliances, including a switch cabinet top plate, a cover plate and a spring mechanism, which work together to automatically reset after pressure relief. When pressure relief is not required, the pressure relief cover plate can cover the pressure relief hole to prevent dust and dripping water from entering the switch cabinet, causing a series of problems such as short circuit. When the internal pressure of the switch cabinet increases, the pressure relief cover plate can be opened quickly, and a gas spring is arranged inside the pressure relief device to speed up the opening speed of the pressure relief cover plate. When the pressure relief action is completed, the pressure relief cover plate automatically returns to its original state under the action of gravity. The gas spring inside the pressure relief device can reduce the resetting speed of the pressure relief cover plate, so that the pressure relief gas inside the switch cabinet is discharged as soon as possible, so as to prevent the short circuit breaking failure of the DC switch cabinet due to the incomplete discharge of the pressure relief gas, and improve the safety and reliability of the DC switch cabinet.
Description
Technical Field
The utility model relates to the technical field of switching appliances, in particular to a pressure relief device of a direct current switch cabinet.
Background
The direct current switch cabinet is widely applied to direct current traction power supply systems of rail transit such as subways, light rails and the like. The rail transit direct current switch cabinet is a device for providing monitoring, control and protection for a traction power supply system in the field of rail transit, is generally integrated on the devices such as the rail transit direct current switch cabinet, a contact net and the like, is a basic part of rail transit power supply equipment, and guarantees the last defense line safety of the rail transit traction power supply system. The switch cabinets are mainly applied to rail transit systems such as subways and light rails, and along with rapid development of Chinese economy and maturity of rail transit technologies, more and more Chinese cities start to build subways, light rails and the like, so that the requirements of power supply equipment of the Chinese rail transit are growing.
The direct current switch cabinet plays an important role in a subway direct current power supply system, and the 1500V direct current switch cabinet is most commonly used at present. The switch cabinets are mainly used for direct-current traction power supply systems and used for distributing direct-current electric energy to realize measurement and control and protection of equipment such as feeder lines, contact networks or contact rails and bus communication of upper monitoring equipment. The structure of the direct current switch cabinet comprises a wire inlet cabinet, a feeder cabinet, a negative pole cabinet and the like, wherein the wire inlet cabinet is used for installing equipment between the positive pole of the rectifier and the DC1500V positive pole busbar, and the control of feeding of the rectifier unit to the DC1500V direct current positive pole busbar is realized.
The utility model discloses a quick self-resetting decompression mechanism of cubical switchboard of authorized bulletin number CN207116928U, including pressure release roof and pressure release shutter board, it has the door to open on the cubical switchboard high-pressure chamber, pressure release roof includes front portion and rear portion, and the front portion AND gate of pressure release roof is connected, and the rear portion of pressure release roof is equipped with the pressure release access port, the upper edge and the pressure release shutter board of pressure release access port pass through hinged joint, and pressure release shutter board covers the pressure release access port under the action of gravity. The self-resetting pressure release mechanism has strong protection capability and can automatically recover after pressure release. But this self-resetting pressure release mechanism exists the unable offset pressure release apron self gravity of pressure release pressure, leads to the unable risk of opening of pressure release apron.
The pressure-relief waterproof roof for the bus room comprises a pressure-relief waterproof roof, a water baffle, a guide plate and a filter screen, wherein the pressure-relief waterproof roof is arranged at the top of the bus room and is communicated with the bus room, the water baffle for bending treatment is arranged on the long side of the top of the pressure-relief waterproof roof, the guide plate is arranged on the short side of the top of the pressure-relief waterproof roof, a grid is arranged on the side face of the pressure-relief waterproof roof, and the filter screen is arranged on the surface of the grid. The pressure relief waterproof roof is provided with a special pressure relief channel, and fault arcing gas is timely discharged. But the waterproof top of pressure release needs to carry out cold rolled steel sheet welding, and processing is complicated, and manufacturing cost is high, and pressure release passageway sets up in the side simultaneously, and pressure release area is less, and pressure release ability is limited.
In summary, there are a number of drawbacks in the prior art, summarized as follows:
① When a short circuit fault occurs in the direct current switch cabinet or the direct current breaker conducts short circuit current on-off, a large amount of arc light and gas can be generated in the direct current switch cabinet, so that the direct current switch cabinet bursts under strong pressure, and the safety of personnel and equipment is endangered;
② The existing direct current switch cabinet generally adopts a mode of screen plate pressure relief, and the screen plate pressure relief has a plurality of problems, and as the screen plate is provided with larger meshes, the protection level of the direct current switch cabinet is reduced, dust and water drops cannot be prevented from entering the direct current switch cabinet, and a series of problems such as short circuit and the like are caused;
③ The pressure release mechanism that partly direct current switch cabinet adopted can reply, but the structure is complicated, and exists the unable offset pressure release apron self gravity of pressure release pressure, leads to the unable risk of opening of pressure release apron.
Disclosure of utility model
Aiming at the defects of the prior art, the utility model provides a pressure relief device of a direct current switch cabinet, so as to solve the problems.
In order to achieve the above object, the present utility model is achieved by the following technical scheme.
The utility model provides a direct current switch cabinet pressure relief device, includes switch cabinet roof, apron and spring mechanism, switch cabinet roof and apron pass through hinged joint, be equipped with roof support, pressure release hole on the switch cabinet roof, be equipped with the roof hem around the pressure release hole, be equipped with apron support, apron hem on the apron, spring mechanism includes air spring, roof support, apron support, roof support passes through air spring connection with the apron support.
Preferably, when the gas spring stretches or contracts, the cover plate can be driven to rotate along the hinge.
Preferably, a limiting support is arranged on the top plate of the switch cabinet.
Preferably, the limiting support limits the movable range of the cover plate connecting hinge to be smaller than 90 degrees, and the cover plate is prevented from being unable to reset after the pressure relief action.
Preferably, the limiting support is fixed on the top plate of the switch cabinet through a screw.
Preferably, the gas spring is movably connected to the top plate support.
Preferably, the gas spring is movably connected to the cover support.
Preferably, the spring mechanisms are symmetrically arranged on the top plate of the switch cabinet.
Preferably, the top plate edge folding and the top plate of the switch cabinet are welded by a steel plate, the cover plate edge folding and the cover plate are welded by the steel plate, and the steel plate is welded without punching and drilling holes on steel, so that the labor and time are saved, the sectional area of the material is not reduced, and the material is fully utilized.
Preferably, the manufacturing materials of the top plate and the cover plate of the switch cabinet are epoxy glass cloth plates, and the epoxy glass cloth plates have the characteristics of high mechanical and dielectric properties, good heat resistance, good moisture resistance and the like, and are suitable for manufacturing high-insulation structural parts for machinery, electric appliances and electronics.
Compared with the prior art, the utility model discloses a pressure relief device of a direct current switch cabinet, which comprises a switch cabinet top plate, a cover plate and a spring mechanism which are combined to play a role.
① The pressure relief device has high reliability and can be automatically reset after pressure relief. When pressure relief is not needed, the pressure relief cover plate can cover the pressure relief hole, so that dust and water drops are prevented from entering the switch cabinet;
② The pressure release device is internally provided with a gas spring, so that the opening speed of the pressure release cover plate can be increased, and the situation that the pressure release cover plate cannot be opened due to the fact that the pressure release pressure cannot offset the gravity of the pressure release cover plate is prevented;
③ The gas spring in the pressure relief device can reduce the reset speed of the pressure relief cover plate, so that the pressure relief gas in the switch cabinet is discharged as soon as possible, and the failure of the short-circuit opening of the direct-current switch cabinet caused by incomplete discharge of the pressure relief gas is prevented.
Drawings
FIG. 1 is a schematic diagram of the overall front view structure of the present utility model;
FIG. 2 is a schematic diagram of the overall left-view structure of the present utility model;
FIG. 3 is a schematic view showing the structure of the cover plate of the present utility model when the cover plate is rotated to a certain angle (θ 1) along the hinge;
FIG. 4 is a schematic diagram showing the structure of the cover plate reset of the utility model only by the elasticity of the gas spring and the gravity of the cover plate;
FIG. 5 is a schematic view of the overall rear view of the present utility model;
FIG. 6 is a schematic diagram of the overall front view structure of the present utility model without pressure relief;
FIG. 7 is a schematic diagram of the overall left-view structure without pressure relief according to the present utility model;
FIG. 8 is a schematic diagram of the overall left-hand construction of the uninstalled spring structure of the present utility model;
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.
Example 1
The utility model provides a direct current switch cabinet pressure relief device, includes switch cabinet roof 1, apron 2 and spring mechanism, switch cabinet roof 1 and apron 2 pass through hinge 10 and connect, be equipped with roof support 4, pressure release hole 8 on the switch cabinet roof 1, be equipped with roof hem 7 around the pressure release hole 8, be equipped with apron support 5, apron hem 9 on the apron 2, spring mechanism includes air spring 3, roof support 4, apron support 5, roof support 4 and apron support 5 pass through air spring 3 and connect.
When the gas spring 3 stretches or contracts, the cover plate 2 can be driven to rotate along the hinge 10.
And a limiting support piece 6 is arranged on the top plate 1 of the switch cabinet.
The limiting support piece 6 is fixed on the top plate 1 of the switch cabinet through a screw.
The limiting support piece 6 limits the movable range of the cover plate 2 connected with the hinge 10 to be smaller than 90 degrees, and the cover plate is prevented from being unable to reset after the pressure relief action.
The gas spring 3 is movably connected with the top plate support 4.
The gas spring 3 is movably connected to the cover support 5.
The spring mechanisms are symmetrically arranged on the top plate 1 of the switch cabinet, and the gas springs 3 can be installed and used on two sides of the top plate 1 and the cover plate 2 of the switch cabinet.
The top plate folded edge 7 and the top plate 1 of the switch cabinet are welded by a steel plate, the cover plate folded edge 9 and the cover plate 2 are welded by the steel plate, and the steel plate is welded without punching and drilling holes on steel, so that labor and time are saved, the sectional area of the material is not reduced, and the material is fully utilized.
The manufacturing materials of the top plate 1 and the cover plate 2 of the switch cabinet are epoxy glass cloth plates, and the epoxy glass cloth plates have the characteristics of high mechanical and dielectric properties, good heat resistance, good moisture resistance and the like, and are suitable for manufacturing high-insulation structural parts for machinery, electric appliances and electronics.
The implementation scene is that direct current switch cabinet pressure relief device is under the condition that need not the pressure release, as shown in fig. 6, fig. 7, fig. 8, cover plate 2 covers pressure release hole 8 under the action of gravity, because switch cabinet roof 1 is provided with roof hem 4 around pressure release hole 8, be provided with apron hem 9 around cover plate 2, roof hem 4 and apron hem 9 can effectively block dust, moist air or outside drip entering switch cabinet inside, under the condition that need not the pressure release, air spring 3 is in compressed state this moment, air spring 3 produces ascending effort to cover plate 2, at this moment the elasticity of air spring 3 is F 3, the angle of air spring 3 and cover plate 2 is θ 3, then air spring 3 produces upwards for F 3*s i n(θ3 to cover plate 2), as long as the moment that this effort F 3*s i n(θ3) produced is less than the moment that the gravity of cover plate 2 itself produced, then cover plate 2 will be in the static state.
The implementation scene is that the pressure relief device of the direct current switch cabinet starts the pressure relief action, as shown in fig. 1, 2 and 3, when faults such as short circuit, arcing and the like occur in the direct current switch cabinet, when the temperature of a high-pressure chamber and the internal air pressure are rapidly increased, the cover plate 2 is subjected to upward pressure, when the upward acting force moment generated by the pressure and the air spring 3 on the cover plate 2 is larger than the gravity moment of the cover plate 2, the cover plate 2 rotates upwards along the hinge 10, the pressure relief device starts the pressure relief action, and in the process that the cover plate 2 rotates upwards along the hinge 10, the air spring 3 generates upward acting force on the cover plate 2, so the air spring 3 can accelerate the movement of the cover plate 2, the cover plate 2 is opened faster, and the pressure relief speed of the pressure relief device is improved.
The real-time scene is reset after the pressure relief is finished, the cover plate 2 is not subjected to upward pressure relief, at this time, whether the cover plate 2 is reset is influenced by the elasticity of the gas spring 3 and the gravity of the cover plate 2, as shown in fig. 3 and 4, when the cover plate 2 rotates to a certain angle (theta 1) along the hinge 10, the limiting support 6 can block the cover plate 2 to prevent the cover plate 2 from rotating beyond a certain angle (theta 1), at this time, the gravity of the cover plate 2 is F 1, the angle between the cover plate 2 and the horizontal plane is (theta 1), the equivalent moment length of the cover plate 2 is L 1, the downward rotation moment generated by the gravity of the cover plate 2 is F 1*cos(θ1)*L1, the angle between the gas spring 3 and the cover plate 2 is (theta 2), the elasticity of the gas spring 3 is F 2, the moment length of the gas spring 3 is L 2, the upward rotation moment generated by the gas spring 3 is F 2*s i n(θ2)*L2, when F 1*cos(θ1)*L1＞F2*s i n(θ2)*L2, namely when the downward rotation moment generated by the gravity of the cover plate 2 is larger than the upward rotation moment generated by the gas spring 3, the cover plate 2 starts to move downwards, the pressure relief device starts to reset, during the downward movement of the cover plate 2, cos (theta 1) is continuously increased and s i n (theta 2) is continuously reduced due to the continuous reduction of angles theta 1 and theta 2, through selecting a proper gas spring 3, the downward rotation moment generated by the gravity of the cover plate 2 is always far larger than the upward rotation moment generated by the gas spring 3, so that the cover plate 2 continuously moves downwards until the cover plate 2 reaches a horizontal position, and during the downward movement of the cover plate 2, the pressure relief device automatically completes one-time reset, because the cover plate 2 receives the upward rotation moment generated by the gas spring 3, the descending speed of the cover plate 2 is slower than that of the case without the gas spring 3, so that the pressure relief device can discharge the gas in the switch cabinet as soon as possible, and the rapid pressure relief function is realized.
Example 2
Based on the other technical features in the embodiment 1, the gas spring 3 can be installed and used on one side of the top plate 1 and the cover plate 2 of the switch cabinet.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. The pressure relief device for the direct current switch cabinet is characterized by comprising a switch cabinet top plate (1), a cover plate (2) and a spring mechanism, wherein the switch cabinet top plate (1) and the cover plate (2) are connected through a hinge (10), a top plate support (4) and a pressure relief hole (8) are formed in the switch cabinet top plate (1), top plate folded edges (7) are formed in the periphery of the pressure relief hole (8), a cover plate support (5) and a cover plate folded edge (9) are arranged on the cover plate (2), the spring mechanism comprises a gas spring (3), a top plate support (4) and a cover plate support (5), and the top plate support (4) and the cover plate support (5) are connected through the gas spring (3).
2. The pressure relief device for the direct current switch cabinet according to claim 1, wherein the cover plate (2) can be driven to rotate along the hinge (10) when the gas spring (3) stretches or contracts.
3. The pressure relief device for the direct-current switch cabinet is characterized in that a limiting support (6) is arranged on a top plate (1) of the switch cabinet.
4. A pressure relief device for a DC switch cabinet according to claim 3, characterized in that the limiting support (6) is fixed on the top plate (1) of the switch cabinet by a screw.
5. The pressure relief device for a direct current switch cabinet according to claim 3, wherein the limiting support (6) limits the movable range of the connecting hinge (10) of the cover plate (2) to be smaller than 90 degrees.
6. A pressure relief device for a DC switchgear cabinet according to claim 1, characterized in that the gas spring (3) is movably connected to the top plate support (4).
7. A pressure relief device for a DC switchgear cabinet according to claim 1, characterized in that the gas spring (3) is movably connected to the cover support (5).
8. The pressure relief device for a direct current switch cabinet according to claim 1, wherein the spring mechanisms are symmetrically arranged on a top plate (1) of the switch cabinet.
9. The pressure relief device for the direct-current switch cabinet is characterized in that the top plate folded edge (7) and the top plate (1) of the switch cabinet are welded by steel plates, and the cover plate folded edge (9) and the cover plate (2) are welded by steel plates.
10. The pressure relief device for the direct-current switch cabinet is characterized in that the manufacturing materials of the top plate (1) and the cover plate (2) of the switch cabinet are epoxy glass cloth plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202422292791.1U CN223124405U (en) | 2024-09-20 | 2024-09-20 | Pressure relief device of direct current switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202422292791.1U CN223124405U (en) | 2024-09-20 | 2024-09-20 | Pressure relief device of direct current switch cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN223124405U true CN223124405U (en) | 2025-07-18 |
Family
ID=96370572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202422292791.1U Active CN223124405U (en) | 2024-09-20 | 2024-09-20 | Pressure relief device of direct current switch cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN223124405U (en) |
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2024
- 2024-09-20 CN CN202422292791.1U patent/CN223124405U/en active Active
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