CN113328369A

CN113328369A - Switch cabinet with pressure relief protection device

Info

Publication number: CN113328369A
Application number: CN202110600295.6A
Authority: CN
Inventors: 王健; 马宁; 赵朔; 王誉霏; 王萍; 房明东
Original assignee: Fangcheng Power Supply Co Of State Grid Henan Electric Power Co
Current assignee: Fangcheng Power Supply Co Of State Grid Henan Electric Power Co
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2021-08-31
Anticipated expiration: 2041-05-31
Also published as: CN113328369B

Abstract

The invention discloses a switch cabinet with a pressure relief protection device, which comprises a cabinet body, wherein a first clearing hole is formed in the top of the cabinet body, the first clearing hole is closed by a first sealing plate attached to the top surface of the cabinet body, a first fixing assembly for fixing the first sealing plate is arranged between the first sealing plate and a top plate of the cabinet body, a plurality of folding rods are arranged between the first sealing plate and the cabinet body, when the temperature in the switch cabinet rises to a set value, the first fixing assembly loses the fixing effect, the folding rods automatically unfold, the first sealing plate is parallel to the top surface of the cabinet body, when the temperature in the switch cabinet rises to the set value, the first sealing plate moves upwards to prepare for pressure relief in advance, and the first sealing plate is positioned above the first clearing hole to shield parts sprayed in the pressure relief process and prevent the parts from smashing surrounding personnel.

Description

Switch cabinet with pressure relief protection device

Technical Field

The invention relates to the technical field of switch cabinets, in particular to a switch cabinet with a pressure relief protection device.

Background

In the operation process of a switch cabinet, under the conditions of insulation aging, human misoperation, design defects of the switch cabinet and the like, a short-circuit fault can occur in a primary loop, a short-circuit current of tens of thousands of amperes is generated, the short-circuit current can instantly generate high-temperature and high-pressure gas, and the switch cabinet can be cracked if fault airflow cannot be effectively released in a short time due to the fact that a cabinet body is narrow, so that the adjacent switch cabinet and workers are seriously damaged, and a major safety accident is caused. Therefore, when the switch cabinet is designed, pressure relief measures are provided, for example, a cover plate is fixed at the top of the switch cabinet through a bolt with set strength, which is commonly adopted in the prior art, when pressure relief is performed, the bolt fails, the cover plate is opened to realize pressure relief, when pressure relief is performed, airflow in the switch cabinet firstly impacts the cover plate and then flows out from a gap between the cover plate and the cabinet body, and when the airflow flows out, the airflow is blocked, so that the explosion risk still exists; in the prior art, in order to increase the area of a pressure relief channel, the cover plate is pushed by airflow to be turned upwards and opened, and parts during pressure relief are not blocked when being sprayed out from the gap, so that surrounding personnel are easily injured by smashing.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a switch cabinet with a pressure relief protection device, wherein when the temperature in the switch cabinet rises to a set value, a first sealing plate moves upward to prepare for pressure relief in advance, and the first sealing plate is located above a first clearing hole to shield a part sprayed in the pressure relief process, so as to prevent the part from injuring surrounding people.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a cubical switchboard with pressure release protector, includes the cabinet body, cabinet body top sets up clears away hole one, it is sealed by the closure plate one of laminating at cabinet body top surface to clear away hole one, set up the fixed subassembly one of fixed closure plate one between closure plate one and the cabinet body roof, set up a plurality of folding rods between closure plate one and the cabinet body, when the temperature rose the setting value in the cubical switchboard, fixed subassembly one loses the fixed action, the folding rod is automatic to be expanded, closure plate one is parallel with cabinet body top surface.

Furthermore, the folding rod is formed by hinging two connecting rods, a first torsion spring is arranged at the hinging position, and two ends of the folding rod are respectively connected with the first closing plate and the top plate of the cabinet body in a rotating mode.

Further, fixed subassembly one is including a plurality of pothooks that the symmetry set up, the pothook articulates on cabinet body roof, and articulated department sets up torsional spring two, set up on the closure plate one with pothook assorted draw-in groove 19, set up the rotatory drive assembly of drive pothook simultaneously on the closure plate one.

Further, the pothook static connection that sets up with one side is in the pivot, the pivot rotates to be connected on cabinet body roof, is located different epaxial correspondences that rotate the pothook below slope sets up the down tube, drive assembly includes the horizontal plate that the level set up between the down tube, the drive arrangement that the drive diaphragm rises between diaphragm and the cabinet body roof, the diaphragm rises, the drive the synchronous antiport of pivot.

Furthermore, the driving device is an electromagnet, a temperature sensor and a singlechip are arranged in the cabinet body, the temperature sensor is electrically connected with the control end of the temperature sensor, the control end of the electromagnet is electrically connected with the output end of the singlechip, a concave frame is arranged on the top plate of the cabinet body, the electromagnet is arranged on the bottom surface of the concave frame, a housing is arranged outside the electromagnet, the housing is statically connected on the bottom surface of the concave frame, the moving plate is horizontally arranged below the electromagnet, a compression spring is vertically arranged between the concave frame and the moving plate, push rods are symmetrically and vertically arranged on two sides of the movable plate, the top surfaces of the push rods are contacted with the transverse plate, a sliding groove for the push rods to slide up and down is arranged in the housing, the concave frame is provided with a through hole for the push rod to vertically penetrate through, when the electromagnet is electrified, the electromagnet is contacted with the moving plate, and the push rod pushes the transverse plate to vertically move upwards.

Further, set up respectively on the curb plate of cabinet body both sides and clear away hole two, clear away hole two and seal by the closure plate two of laminating in cabinet body both sides, set up a plurality of round pins on the closure plate two, set up the through-hole that supplies the round pin axle to pass on the cabinet body curb plate, set up extension spring between round pin axle and the closure plate two, set up fixed subassembly two of fixed closure plate two between closure plate two and the cabinet body curb plate, when cubical switchboard temperature rose to the specified value, fixed subassembly two lost the fixed action, extension spring contracts, produce the space between closure plate two and the cabinet body side.

The invention has the beneficial effects that:

1. the invention provides a switch cabinet with a pressure relief protection device, wherein when the temperature in the switch cabinet rises to a specific value, a folding rod is unfolded, a first sealing plate moves vertically upwards, a larger gap exists between the first sealing plate and a top plate of a cabinet body, and the switch cabinet is not subjected to pressure relief at the moment; the first sealing plate is vertically arranged above the first clearing hole, and the sprayed parts are blocked by the first sealing plate during pressure relief, so that the first sealing plate is prevented from falling at a high speed and injuring surrounding personnel.

2. Install torsional spring one between the folding rod, rely on the power of torsional spring one to expand the folding rod to push away the enclosure plate one from the cabinet body, simple structure is uncharged, does not rely on hydraulic system yet, and high temperature when having avoided the pressure release causes the influence to the folding rod, increases the security and the stability in use of this device.

3. The first sealing plate moves downwards, the clamping hook is clamped in the clamping groove, the first sealing plate is fixed on the cabinet body, the folding rod is fixed in a folding mode, the first torsion spring stores elastic potential energy, the structure is simple and practical, after the clamping hook is separated from the clamping groove, the elastic potential energy is released, the first sealing plate bounces rapidly, and full preparation is made for pressure relief.

4. The pothook sets up in the pivot, as long as drive pivot rotation just can drive the pothook rotatory, and the diaphragm moves up, drives two pivot synchronous rotations, and the pothook loses the fixed action to closing plate one in step, and closing plate one moves up, need not to carry out single control to the pothook, simplifies the structure, and control effect is better.

5. When the temperature sensor detects that the temperature rises to a certain value, the single chip microcomputer controls the electromagnet to be powered on, the transverse plate moves upwards, the driving rotating shaft synchronously and reversely rotates, the clamping hook loses the control effect on the first closing plate, the first closing plate moves upwards, then the electromagnet is rapidly powered off, the clamping hook returns to the original position under the action of the second torsion spring, when the switch cabinet is depressurized, high-temperature gas is outwards sprayed out along the cleaning hole, the electromagnet also receives the impact of the high-temperature gas, but the electromagnet is in a power-off state at the moment, the electromagnet does not need to be continuously used in the high-temperature state, and the electromagnet is protected.

6. When the temperature sensor detects that the temperature in the switch cabinet rises to a certain value, the fixing assembly II loses the sealing effect on the sealing plate II, a gap is generated between the sealing plate II and the cabinet body under the drive of the compression spring, gas flows out from the gap, a channel for the gas to flow out is increased, and pressure relief is facilitated.

Drawings

FIG. 1 is a schematic view of the closure panel of the first embodiment of the present invention as it is opened;

FIG. 2 is a schematic structural view of the second closing plate when closed;

FIG. 3 is a schematic diagram showing the distribution of the cabinet, the hooks and the concave frame;

fig. 4 is a schematic view of a connection structure of the hook and the cabinet body on the same rotation axis;

FIG. 5 is a schematic view of the rotation process of the transverse plate driving hook;

FIG. 6 is a schematic diagram of an electromagnet and its connecting assembly;

FIG. 7 is a schematic structural diagram of a second embodiment of the present invention;

the cabinet comprises a cabinet body 1, a cleaning hole I2, a sealing plate I3, a folding rod 4, a clamping hook 5, a torsion spring II 6, a rotating shaft 7, an inclined rod 8, a transverse plate 9, an electromagnet 10, a concave frame 11, a movable plate 12, a push rod 13, a sliding chute 14, a cleaning hole II 15, a sealing plate II 16, an extension spring 17, a cleaning hole III 18, a clamping groove 19, a cover 20, a compression spring 21, a spring hinge 22, a right-angle groove 23 and a pin shaft 24.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

As shown in fig. 1-6, a first embodiment of the present invention is a switch cabinet with a pressure relief protection device, which comprises a cabinet body 1, wherein a first cleaning hole 2 is formed at the top of the cabinet body 1, the first cleaning hole 2 is closed by a first sealing plate 3 attached to the top surface of the cabinet body 1, a first fixing component for fixing the first sealing plate 3 is arranged between the first sealing plate 3 and the top plate of the cabinet body 1, the first fixing component comprises four hooks 5 symmetrically arranged, a through hole for the hooks 5 to penetrate out and rotate is formed on the top plate of the cabinet body 1, as shown in fig. 3, the hooks 5 are hinged on the top plate of the cabinet body 1, two hooks 5 arranged on the same side are welded on a rotating shaft 7, third cleaning holes 18 are formed on the cabinet body 1 on both sides of the through hole, the rotating shaft 7 is inserted into the third cleaning holes 18, a second torsion spring 6 is installed between both ends of the rotating shaft 7 and the third cleaning holes 18, as shown in fig. 4, one end of the second torsion spring 6 is adhered to the rotating shaft 7, the other end of the first sealing plate 3 is bonded on the inner wall of the third clearing hole 18, a clamping groove 19 matched with the clamping hook 5 is processed on the first sealing plate 3, the first sealing plate 3 moves downwards, and the top of the clamping hook 5 enters the clamping groove 19 and is clamped by the clamping groove 19; the symmetry sets up four folding rod 4 between the closure plate 3 and the cabinet body 1, folding rod 4 is formed by two connecting rods through the articulated spring hinge 22, be provided with torsional spring one in the spring hinge 22, 4 both ends of folding rod rotate respectively and link closure plate 3 and cabinet body 1 roof, the through-hole that gets into after processing out on the cabinet body 1 roof and supplying folding rod 4, folding rod 4 is shown as figure 1 when expanding, the contained angle between two connecting rods this moment is the obtuse angle, press closure plate 3 down, folding rod 4 is folding, pothook 5 card is gone into in the draw-in groove 19, as shown in figure 2, closure plate 3 contacts with cabinet body 1 roof, it seals to clear away hole 2.

A driving component for driving the hooks 5 to rotate simultaneously is arranged on the first closing plate 3, inclined rods 8 are obliquely arranged below the corresponding hooks 5 on different rotating shafts 7, the inclined rods 8 and the hooks 5 are integrally formed, the driving component comprises a transverse plate 9 horizontally arranged between the inclined rods 8, a driving device for driving the transverse plate 9 to ascend between the transverse plate 9 and a top plate of the cabinet body 1, the driving device is an electromagnet 10, the installation mode of the electromagnet 10 is shown in figure 6, a concave frame 11 is bonded on the bottom surface of the top plate of the cabinet body 1, the electromagnet 10 is fixedly installed at the center of the bottom surface of the concave frame 11 through screws and the like, a housing 20 with a round shell structure with an open top is arranged outside the electromagnet 10, the top of the housing 20 is bonded on the bottom surface of the concave frame 11, a movable plate 12 is horizontally arranged below the electromagnet 10, a compression spring 21 is vertically bonded between the concave frame 11 and the movable plate 12, the electromagnet 10 is positioned in the compression spring 21, push rods 13 are symmetrically and vertically arranged on two sides of the moving plate 12, a sliding groove 14 for the push rod 13 to slide up and down is bonded in the housing 20, the top surface of the push rod 13 is bonded with the transverse plate 9, a through hole for the push rod 13 to vertically penetrate is processed on the bottom surface of the concave frame 11, when the electromagnet 10 is not electrified, as shown in the left diagram of fig. 5, the compression spring 21 is original length, and the bottom surface of the transverse plate 9 is in contact with the inner bottom surface of the concave frame 11; when the electromagnet 10 is powered on, as shown in the diagram on the right side of fig. 6, the electromagnet 10 adsorbs the moving plate 12, the moving plate 12 drives the transverse plate 9 to move upwards through the push rod 13, the transverse plate 9 pushes the two inclined rods 8 to synchronously and reversely rotate, the inclined rods 8 drive the four symmetrically arranged clamping hooks 5 to synchronously and reversely rotate, the clamping hooks 5 are separated from the clamping grooves 19, at the moment, the folding rods 4 are rapidly unfolded under the action of the spring hinges 22, and the first closing plate 3 is located above the top surface of the cabinet body 1 and is parallel to the top surface of the cabinet body 1.

A temperature sensor and a single chip microcomputer (not shown in the figure) are installed in the cabinet body 1, the temperature sensor is electrically connected with a control end of the temperature sensor, a control end of an electromagnet 10 is electrically connected with an output end of the single chip microcomputer, when the temperature in the switch cabinet rises to a set value, the electromagnet 10 is controlled by the single chip microcomputer to be electrified, a clamping hook 5 is pushed by a transverse plate 9 to rotate, the clamping hook 5 loses the limiting effect on a first closing plate 3 at the same time, a folding rod 4 is automatically unfolded to prepare for pressure relief, and the first closing plate 3 is located on a first clearing hole 2 to block ejected foreign matters; the electromagnet 10 is powered off rapidly after being powered on, the hook 5 returns to the original position, and the electromagnet 10 is in a power-off state when being depressurized to protect the electromagnet 10; pressure release finishes and overhauls the back to cubical switchboard internal plant, pushes down a closing plate 3, in order to guarantee that pothook 5 can get into draw-in groove 19, bonds four right angle grooves 23 on the cabinet body 1 roof, and four angles of a closing plate 23 move down along right angle groove 23, ensure that pothook 5 is relative with draw-in groove 19.

Example two

As shown in fig. 7, a second embodiment of the present invention is different from the first embodiment in that two clearing holes 15 are respectively processed on the side plates on two sides of the cabinet 1, the clearing holes 15 are closed by two closing plates 16 attached to two sides of the cabinet 1, four hinge pins 24 are bonded on the closing plates 16, a through hole for the hinge pin 24 to pass through is formed on the side plate of the cabinet 1, an extension spring 17 is bonded between the hinge pin 24 and the closing plates 16, the extension spring 17 is located in the cabinet 1, a second fixing component for fixing the closing plates 16 is arranged between the closing plates 16 and the side plate of the cabinet 1, the second fixing component comprises a hook and a slot arranged on the closing plates 16, and the hook and the slot are arranged in the same manner as the first embodiment; the first closing plate 3 is provided with a driving component which simultaneously drives the hook to rotate, and the driving component is completely the same as the driving component in the first embodiment.

When the temperature sensor detects that the temperature in the switch cabinet is normal, the clamping hook is positioned in the clamping groove, the extension spring 17 extends, and the second closing plate 16 closes the second cleaning hole 15; when the temperature sensor detects that the temperature in the switch cabinet rises to a certain value, the driving assembly drives the clamping hook to be separated from the clamping groove, the extension spring 17 retracts, a gap is formed between the second sealing plate 16 and the side face of the cabinet body 1, and gas overflows from the second cleaning hole 15.

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent substitutions made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims

1. The utility model provides a cubical switchboard with pressure release protector, includes the cabinet body (1), its characterized in that, cabinet body (1) top sets up clears away hole (2), clear away hole (2) and seal by laminating in enclosure plate (3) of cabinet body (1) top surface, set up the fixed subassembly one of fixed enclosure plate (3) between enclosure plate (3) and the cabinet body (1) roof, set up a plurality of folding rod (4) between enclosure plate (3) and the cabinet body (1), when the temperature rose the setting value in the cubical switchboard, fixed subassembly one loses fixed action, folding rod (4) are automatic to be expanded, enclosure plate (3) are parallel with cabinet body (1) top surface.

2. The switch cabinet with the pressure relief protection device according to claim 1, wherein the folding rod (4) is formed by two connecting rods in a hinged manner, a first torsion spring is arranged at the hinged position, and two ends of the folding rod (4) are respectively and rotatably connected with the first closing plate (3) and the top plate of the cabinet body (1).

3. The switch cabinet with the pressure relief protection device according to claim 2, wherein the first fixing component comprises a plurality of hooks (5) symmetrically arranged, the hooks (5) are hinged on the top plate of the cabinet body (1), a second torsion spring (6) is arranged at the hinged position, a clamping groove (19) matched with the hooks (5) is arranged on the first closing plate (3), and a driving component for driving the hooks (5) to rotate is arranged on the first closing plate (3).

4. The switch cabinet with the pressure relief protection device according to claim 3, wherein the hooks (5) arranged on the same side are statically connected to the rotating shaft (7), the rotating shaft (7) is rotatably connected to the top plate of the cabinet body (1), the inclined rods (8) are obliquely arranged below the corresponding hooks (5) on different rotating shafts (7), the driving component comprises transverse plates (9) horizontally arranged between the inclined rods (8), the driving device for driving the transverse plates (9) to ascend between the transverse plates (9) and the top plate of the cabinet body (1), and the transverse plates (9) ascend to drive the rotating shafts (7) to synchronously and reversely rotate.

5. The switch cabinet with the pressure relief protection device according to claim 5, wherein the driving device is an electromagnet (10), a temperature sensor and a single chip microcomputer are arranged in the cabinet body (1), the temperature sensor is electrically connected with a control end of the temperature sensor, the control end of the electromagnet (10) is electrically connected with an output end of the single chip microcomputer, a concave frame (11) is arranged on a top plate of the cabinet body (1), the electromagnet (10) is arranged on the bottom surface of the concave frame (11), a cover (20) is arranged outside the electromagnet (10), the cover (20) is statically connected on the bottom surface of the concave frame 11, a moving plate (12) is horizontally arranged below the electromagnet (10), a compression spring (21) is vertically arranged between the concave frame and the moving plate (12), push rods (13) are symmetrically and vertically arranged on two sides of the moving plate (12), and the top surface of the push rod (13) is in contact with the transverse plate (9), the novel electric iron is characterized in that a sliding groove (14) for the push rod (13) to slide up and down is formed in the housing (20), a through hole for the push rod (13) to vertically penetrate is formed in the concave frame (11), when the electromagnet (10) is electrified, the electromagnet (10) is in contact with the moving plate (12), and the push rod (13) pushes the transverse plate (9) to vertically move upwards.

6. The switch cabinet with pressure relief protection device according to claim 5, the side plates at two sides of the cabinet body (1) are respectively provided with a second clearing hole (15), the second clearing hole (15) is sealed by a second sealing plate (16) attached at two sides of the cabinet body (1), a plurality of pin shafts (24) are arranged on the second closing plate (16), through holes for the pin shafts (24) to pass through are arranged on the side plate of the cabinet body (1), an extension spring (17) is arranged between the pin shaft (24) and the second closing plate (16), a second fixing component for fixing the second sealing plate (16) is arranged between the second sealing plate (16) and the side plate of the cabinet body (1), when the temperature of the switch cabinet rises to a specific value, the second fixing component loses the fixing function, the extension spring (17) retracts, a gap is formed between the second closing plate (16) and the side surface of the cabinet body (1).