Explosion-proof electrical cabinet

Abstract

The utility model discloses an explosion-proof electrical cabinet in the technical field of electric power engineering. The explosion-proof cabinet comprises a cabinet body and an explosion-proof pressure relief plate, and further comprises an explosion-proof box with a bottom opening, a through hole is formed in the top of the cabinet body, the bottom opening of the explosion-proof box corresponds to the top opening of the cabinet body in position, and a back plate of the explosion-proof box integrally or partially serves as the pressure relief plate; one of the upper and lower ends of the pressure relief plate is hinged to the explosion-proof box or the top of the cabinet body, and the other end can rotate towards one side far away from the front of the cabinet body; the upper end of the pressure relief plate is obliquely forward relative to the lower end, and in a normal state, the movable end of the pressure relief plate is lapped on the explosion-proof box or the top of the cabinet body under the action of gravity. The explosion-proof box is additionally arranged, and the explosion-proof box is provided with a pressure relief plate which is opened by rotating backwards, so that gas sprayed by the explosion-proof box is guided to the rear of the electrical cabinet, and hidden dangers to the safety of workers in an operation area are avoided; the pressure relief plate is obliquely arranged and is erected by means of gravity in a normal state, and compared with plastic bolt fixing in the prior art, the pressure relief plate is smaller in needed driving force and higher in safety.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric power engineering, specifically relates to an explosion -proof electrical cabinet. BACKGROUND

[0002] Many existing electrical cabinets are placed in the room, and the protection level of the electrical cabinet is IP40 or above. The existing technology has the problem that if a device fails or short circuits during operation, high-temperature and high-pressure gas is easily generated, and if it is not discharged in time, an explosion may occur, causing serious consequences.

[0003] Therefore, for safety reasons, a pressure relief cover is usually provided on the top of the electrical cabinet, and the pressure relief cover has a ventilation hole. The gas and heat generated inside the electrical cabinet are discharged at ordinary times, thereby reducing the gas pressure inside the electrical cabinet and ensuring the safe operation of the equipment. When a short circuit or other fault occurs inside the electrical cabinet, the gas pressure inside the cabinet increases rapidly, and the pressure relief cover plate will be lifted and the gas will be rapidly discharged. At this time, if the operator is in the operating area in front of the electrical cabinet, the gas sprayed from the electrical cabinet fault will endanger the safety of the operator, and there is a great safety hazard. SUMMARY

[0004] To overcome the problem of poor safety performance of the existing electrical cabinet, the utility model provides an explosion -proof electrical cabinet.

[0005] The utility model solves the technical problems by adopting the following technical scheme:

[0006] The explosion -proof electrical cabinet comprises a cabinet body and a pressure relief plate for explosion prevention, and further comprises an explosion -proof box with a bottom opening. A through hole is formed in the top of the cabinet body. The bottom opening of the explosion -proof box corresponds to the through hole in the top of the cabinet body, so that the interior of the explosion -proof box and the interior of the cabinet body are connected. The back plate of the explosion -proof box as a whole or in part serves as the pressure relief plate. One end of the pressure relief plate at the upper and lower ends is a fixed end, and the other end is a movable end. The fixed end is hinged to the explosion -proof box or the top of the cabinet body. The movable end can be rotated away from the front side of the cabinet body. The upper end of the pressure relief plate is inclined forward relative to the lower end. Under normal conditions, the movable end of the pressure relief plate is lapped on the explosion -proof box or the top of the cabinet body under the action of gravity.

[0007] In this application, an explosion -proof box is added above the cabinet body of the electrical cabinet. The explosion -proof box and the interior space of the cabinet body are connected, and the explosion -proof box has a pressure relief plate that can be turned backward to open. The gas sprayed from the explosion -proof box is directed to the rear of the electrical cabinet, avoiding hidden dangers to the safety of the operating area workers. The pressure relief plate is inclined upward, so that the movable end of the pressure relief plate is lapped under normal conditions by relying on gravity. Compared with the plastic bolt fixation in the prior art, the required driving force is smaller, the pressure relief plate is easier to open, and the safety is stronger.

[0008] In some embodiments, the lower end of the pressure relief plate is a fixed end, and the upper end is a movable end.

[0009] In the embodiment, considering that the movable end rotates away from the front side during the pressure relief process, if the movable end is arranged at the lower end, the gravity direction of the pressure relief plate and the gas ejection direction conflict during the pressure relief process. Here, the lower end of the preferred pressure relief plate is the fixed end. If an abnormality occurs, the gas ejection causes the pressure relief plate to rotate irreversibly in the natural state, avoiding the influence of the self-resetting of the movable end of the pressure relief plate on the pressure relief process when the movable end is at the upper end.

[0010] In some embodiments, the back plate of the explosion-proof box as a whole is the pressure relief plate, and the lower end of the pressure relief plate is hinged to the top of the cabinet.

[0011] In the embodiment, the back plate of the explosion-proof box as a whole is the pressure relief plate, which is convenient for optimizing and reducing the size of the explosion-proof box while taking into account the pressure relief effect. Here, the lower end of the preferred pressure relief plate is hinged to the top of the cabinet.

[0012] In some embodiments, the explosion-proof box is composed of a front panel, a back plate, a top panel, and two side panels; the front panel and the two side panels are fixedly connected to the top of the cabinet, and the top panel is fixedly connected above the front panel and the two side panels.

[0013] In the embodiment, the explosion-proof box does not contain a bottom plate, and the bottom opening is formed by the front panel, the back plate, and the two side panels, which is convenient for optimizing and reducing the size of the explosion-proof box while taking into account the pressure relief effect. At this time, the preferred front panel and the two side panels are fixedly connected to the top of the cabinet.

[0014] In some embodiments, in the normal state, the movable end of the pressure relief plate overlaps the top panel, and the pressure relief plate and the horizontal plane form an included angle of 75°-80°.

[0015] In the embodiment, as set forth above, the included angle between the pressure relief plate and the horizontal plane is large, that is, the included angle of the pressure relief plate relative to the vertical plane is small. In combination with the aforementioned upper end of the pressure relief plate being the movable end, at this time, once an abnormality occurs, the gas ejection for an instant, the rotation angle of the movable end of the pressure relief plate is very small, which can rotate under the action of gravity, facilitating the opening of the pressure relief plate.

[0016] In some embodiments, the movable end of the pressure relief plate is provided with a bent portion, and in the normal state, the bent portion is in contact with the top panel of the explosion-proof box.

[0017] In the embodiment, by adding the bent portion, the pressure relief plate can achieve better sealing effect between the explosion-proof box.

[0018] In some embodiments, the lower end of the pressure relief plate is hinged to the top of the cabinet by a hinge.

[0019] In the embodiment, based on the aforementioned preferred back plate of the explosion-proof box as a whole being the pressure relief plate, the lower end of the preferred pressure relief plate is hinged to the top of the cabinet by a hinge, which is simple in structure and convenient to implement.

[0020] In some embodiments, a proximity switch is fixedly arranged on the top plate, and the proximity switch is electrically connected with a buzzer; when the movable end of the pressure relief plate rotates away from the top plate, the state of the proximity switch changes to trigger the buzzer to act.

[0021] In the embodiment, the reminding function is added by adding the proximity switch and the buzzer, so that the operator can find the abnormality in time; obviously, in the application, the pressure relief plate is used as a movable part, the proximity switch can be used between the pressure relief plate and the cabinet body, or between the pressure relief plate and the top plate; based on the fool-proof consideration, the proximity switch is preferably arranged on the top plate, and the pressure relief plate shields the proximity switch in the normal state, so that the fool-proof effect is stronger.

[0022] In some embodiments, the lower end of the pressure relief plate is 10cm-20cm away from the rear edge of the top of the cabinet body.

[0023] In the embodiment, the lower end, i.e. the fixed end, of the pressure relief plate is a distance away from the rear edge of the top of the cabinet body; in combination with the foregoing, the back plate of the explosion-proof box as a whole is used as the pressure relief plate, which has two effects: one is that the cabinet body can support the pressure relief plate after the pressure relief plate is opened, and the other is that the pressure relief plate can also have a certain fool-proof effect, so that the distance between the electrical cabinet and the wall in practice is ensured to be large enough to ensure that the pressure relief plate can be opened at a large angle.

[0024] In some embodiments, a plurality of through holes are arranged in the thickness direction of the pressure relief plate as exhaust holes.

[0025] In the embodiment, a plurality of through holes are arranged on the pressure relief plate, which are used for exhaust and heat dissipation during the daily work of the electrical cabinet.

[0026] The beneficial effects of the utility model are as follows:

[0027] 1. An explosion-proof box is additionally arranged above the cabinet body of the electrical cabinet, the explosion-proof box is connected with the internal space of the cabinet body, and the explosion-proof box has a pressure relief plate which is rotated to be opened to the rear, so that the gas sprayed from the explosion-proof box is guided to the rear of the electrical cabinet, and the hidden danger to the safety of the operator in the operation area is avoided; the pressure relief plate is arranged obliquely upward, so that the movable end of the pressure relief plate is supported by gravity in the normal state, and the driving force required by the pressure relief plate is smaller than that of the plastic bolt in the prior art, so that the pressure relief plate can be opened, and the safety is higher.

[0028] 2. The lower end of the pressure relief plate is hinged, and the upper end is movable, so that the influence of the self-resetting of the movable end of the pressure relief plate on the pressure relief process is avoided; the back plate of the explosion-proof box is used as the pressure relief plate, and the lower end of the pressure relief plate is hinged to the top of the cabinet body; the explosion-proof box is formed by the front plate, the back plate and the two side plates, and does not contain a bottom plate, so that the size of the explosion-proof box can be optimized and reduced while the pressure relief effect is considered.

[0029] 3. Under normal conditions, the pressure relief plate forms a 75°-80° angle with the horizontal plane to facilitate its opening; there is a certain distance between the lower end of the pressure relief plate and the plane of the back of the cabinet to facilitate the cabinet's support for the pressure relief plate and its opening and closing; multiple through holes are provided in the thickness direction of the pressure relief plate for exhaust and heat dissipation during daily operation of the electrical cabinet. Attached Figure Description

[0030] Figure 1 A front view of the newly installed explosion-proof box on top of the electrical cabinet provided by this utility model;

[0031] Figure 2 A side view of the newly installed explosion-proof box on top of the electrical cabinet provided by this utility model;

[0032] Figure 3 A schematic diagram of the back of the newly installed explosion-proof box on top of the electrical cabinet provided by this utility model. Figure 1 ;

[0033] Figure 4 A schematic diagram of the back of the newly installed explosion-proof box on top of the electrical cabinet provided by this utility model. Figure 2 ;

[0034] Figure 5 for Figure 4 Schematic diagram of the upward pressure relief plate in the middle C;

[0035] Figure 6 for Figure 4 A schematic diagram of the overall structure of the C-shaped upward-facing electrical cabinet.

[0036] The following are marked in the diagram: 1. Front panel; 2. Side panel; 3. Top panel; 4. Angle steel; 5. Rivet; 6. Pressure relief plate; 7. Hinge; 8. Fixed foot; 9. Vent hole; 10. Cabinet body. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings.

[0038] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0039] like Figures 1-6 As shown, this utility model provides an explosion-proof electrical cabinet.

[0040] The explosion-proof electrical cabinet comprises a cabinet body 10 and a pressure relief plate 6 for explosion prevention, and further comprises an explosion-proof box with an open bottom, the cabinet body 10 is provided with a through hole at the top, the open bottom of the explosion-proof box corresponds to the position of the through hole at the top of the cabinet body 10, so that the interior of the explosion-proof box and the interior of the cabinet body 10 are communicated, and the back plate of the explosion-proof box is used as the pressure relief plate 6 as a whole or in part; one end of the pressure relief plate 6 at the upper end and the lower end is a fixed end, and the other end is a movable end, the fixed end is hinged to the explosion-proof box or the top of the cabinet body 10, and the movable end can rotate away from the front side of the cabinet body 10; the upper end of the pressure relief plate 6 is arranged obliquely forward relative to the lower end, and in the normal state, the movable end of the pressure relief plate 6 is lapped on the explosion-proof box or the top of the cabinet body 10 under the action of gravity.

[0041] In the present application, the explosion-proof box is additionally arranged above the cabinet body 10 of the electrical cabinet, the interior of the explosion-proof box and the interior of the cabinet body 10 are communicated, and the explosion-proof box is provided with a pressure relief plate 6 which is turned backward to be opened, so that the gas sprayed from the explosion-proof box is directed to the rear of the electrical cabinet, thereby avoiding the hidden danger to the safety of the workers in the operating area; the pressure relief plate 6 is arranged obliquely upward, so that the movable end of the pressure relief plate 6 is lapped by gravity in the normal state, and compared with the plastic bolt fixing in the prior art, the required driving force is smaller, the pressure relief plate 6 can be opened, and the safety is higher.

[0042] Obviously, in the present application, the electrical cabinet is taken as the front in the position of the operating area of the electrical cabinet.

[0043] In the present embodiment, considering that the movable end is turned away from the front side in the pressure relief process, if the movable end is arranged at the lower end, the gravity direction of the pressure relief plate 6 and the gas spraying direction are opposite in the pressure relief process. Here, the lower end of the pressure relief plate 6 is preferably a fixed end, and if an abnormality occurs, the gas is sprayed to make the pressure relief plate 6 rotate irreversibly in the natural state, thereby avoiding the influence of the self-resetting of the movable end of the pressure relief plate 6 on the pressure relief process when the movable end is at the upper end.

[0044] In the present embodiment, the back plate of the explosion-proof box is used as the pressure relief plate 6 as a whole, and the lower end of the pressure relief plate 6 is hinged to the top of the cabinet body 10. The back plate of the explosion-proof box is used as the pressure relief plate 6 as a whole, so that the size of the explosion-proof box is optimized and reduced, and the pressure relief effect is considered at the same time; here, the lower end of the pressure relief plate 6 is preferably hinged to the top of the cabinet body 10.

[0045] In the present embodiment, the explosion-proof box is composed of a front panel 1, a back plate, a top panel 3 and two side panels 2; the front panel 1 and the two side panels 2 are fixedly connected to the top of the cabinet body 10, and the top panel 3 is fixedly connected above the front panel 1 and the two side panels 2. The explosion-proof box does not comprise a bottom panel, and the open bottom is formed by the combination of the front panel 1, the back plate and the two side panels 2, so that the size of the explosion-proof box is optimized and reduced, and the pressure relief effect is considered at the same time. At this time, the front panel 1 and the two side panels 2 are preferably fixedly connected to the top of the cabinet body 10.

[0046] In the embodiment, in normal state, the movable end of the pressure relief plate 6 is overlapped on the top plate 3, and the pressure relief plate 6 and the horizontal plane form an angle of 75°. As set above, the angle between the pressure relief plate 6 and the horizontal plane is large, that is, the angle of the pressure relief plate 6 relative to the vertical plane is small. In combination with the above-mentioned that the upper end of the pressure relief plate 6 is the movable end, at this time, once the abnormality occurs, the gas is discharged in an instant, the movable end of the pressure relief plate 6 rotates a small angle, which can rotate under the action of gravity, so as to facilitate the opening of the pressure relief plate 6. The angle between the pressure relief plate 6 and the horizontal plane at this time is the angle a in Figure 5 and Figure 6 , and the preferred angle a is 75°-80°.

[0047] In the embodiment, the end of the movable end of the pressure relief plate 6 is provided with a bending part, that is, the upper end of the pressure relief plate 6 is bent in Figure 5 , and in normal state, the bending part is in contact with the top plate 3 of the explosion-proof box. By additionally providing the bending part, the pressure relief plate 6 can achieve better sealing effect between the explosion-proof box.

[0048] In the embodiment, the lower end of the pressure relief plate 6 is hinged to the top of the cabinet 10 through the hinge 7. Based on the above-mentioned preferred explosion-proof box back plate as a whole as the pressure relief plate 6, the lower end of the pressure relief plate 6 is preferably hinged to the top of the cabinet 10 through the hinge 7, which is simple in structure and easy to implement.

[0049] In the embodiment, the proximity switch is fixedly arranged on the top plate 3, the proximity switch is electrically connected with the buzzer, and when the movable end of the pressure relief plate 6 rotates away from the top plate 3, the state of the proximity switch changes to start the buzzer. By additionally providing the proximity switch and the buzzer, the reminding function is increased, so as to facilitate the operator to find the abnormality in time. As is obvious, in the present application, the pressure relief plate 6 is used as a movable part, the proximity switch can be used between the pressure relief plate 6 and the cabinet 10, or can be used between the pressure relief plate 6 and the top plate 3. Based on the anti-failure consideration, the preferred implementation is that the proximity switch is arranged on the top plate 3, and in normal state, the pressure relief plate 6 shields the proximity switch, which has strong anti-failure effect.

[0050] In the embodiment, the lower end of the pressure relief plate 6 is 10cm-20cm away from the rear edge of the top of the cabinet 10. The lower end of the pressure relief plate 6, that is, the fixed end is a distance away from the rear edge of the top of the cabinet 10. In combination with the above-mentioned that the explosion-proof box back plate as a whole is used as the pressure relief plate 6, on the one hand, the cabinet 10 can form a supporting effect on the pressure relief plate 6 after the pressure relief plate 6 is opened, and on the other hand, it also has a certain anti-failure effect, which avoids that the electrical cabinet is close to the wall in practice, and ensures that the pressure relief plate 6 can be opened at a large angle.

[0051] In the embodiment, a plurality of through holes are arranged on the thickness direction of the pressure relief plate 6 as the exhaust holes 9. A plurality of through holes are arranged on the pressure relief plate 6, which are used for exhaust and heat dissipation in daily work of the electrical cabinet.

[0052] Specifically, refer to Figure 1The front panel 1 of the explosion-proof box is a 1.2mm-thick stainless steel rectangular plate, and the fixing feet 8 of the front panel 1 are fixed on the top of the cabinet 10 by rivets 5. Conventionally, the rectangular plate is bent to serve as the fixing feet 8.

[0053] Referring to Figure 2 The side plate 2 of the explosion-proof box is a 1.2mm-thick stainless steel trapezoidal plate, which is welded with the angle steel 4, the top plate 3 and the front panel 1. The fixing feet 8 of the side plate 2 are fixed on the top of the cabinet 10 by rivets 5.

[0054] Referring to Figure 3 The explosion-proof box is provided with the angle steel 4 at the back, which is a 5# angle steel, and is welded with the side plate 2 and the top plate 3. The fixing feet 8 of the angle steel 4 are fixed on the top of the electrical cabinet by rivets 5.

[0055] Referring to Figure 4 The back plate of the explosion-proof box, i.e. the pressure relief plate 6 in the embodiment, is a 1.2mm-thick stainless steel rectangular plate, which is provided with exhaust holes 9 and is connected with the top of the cabinet 10 by hinges 7 and rivets 5.

[0056] Figure 3 And Figure 4 It can be understood as the view of the explosion-proof box in two states, i.e. without the pressure relief plate 6 and with the pressure relief plate 6. Further, it can be understood as the view of the pressure relief plate 6 in two states, i.e. opened and not opened.

[0057] Referring to Figure 5 It is a side view of the pressure relief plate 6, which is fixed on the top of the cabinet 10 by hinges 7 and rivets 5. When the electrical cabinet is in normal operation, the pressure relief plate 6 is overlapped on the top plate 3 of the explosion-proof box. When a short circuit fault occurs in the cabinet 10, the pressure in the cabinet will increase rapidly, and the pressure relief plate 6 will be lifted and turned to the back of the electrical cabinet, so that the gas is rapidly discharged.

[0058] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An explosion-proof electrical cabinet, comprising a cabinet body (10) and a pressure relief plate (6) for explosion protection, characterized in that: It also includes an explosion-proof box with a bottom opening, a through hole on the top of the cabinet (10), and the bottom opening of the explosion-proof box and the top opening of the cabinet (10) are in the same position, so that the inside of the explosion-proof box and the inside of the cabinet (10) are connected. The back panel of the explosion-proof box is used as a pressure relief plate (6) in whole or in part. One end of the pressure relief plate (6) is a fixed end and the other end is a movable end. The fixed end is hinged to the explosion-proof box or the top of the cabinet (10), and the movable end can rotate to the side away from the front of the cabinet (10). The upper end of the pressure relief plate (6) is set diagonally forward relative to the lower end. Under normal conditions, the movable end of the pressure relief plate (6) overlaps the explosion-proof box or the top of the cabinet (10) under the action of gravity.

2. The explosion-proof electrical cabinet as described in claim 1, characterized in that: The pressure relief plate (6) has a fixed end at the bottom and a movable end at the top.

3. The explosion-proof electrical cabinet as described in claim 2, characterized in that: The back panel of the explosion-proof box serves as a pressure relief plate (6), and the lower end of the pressure relief plate (6) is hinged to the top of the cabinet (10).

4. The explosion-proof electrical cabinet as described in claim 3, characterized in that: The explosion-proof box consists of a front panel (1), a back panel, a top panel (3) and two side panels (2); the front panel (1) and the two side panels (2) are fixedly connected to the top of the cabinet (10), and the top panel (3) is fixedly connected above the front panel (1) and the two side panels (2).

5. The explosion-proof electrical cabinet as described in claim 4, characterized in that: Under normal conditions, the movable end of the pressure relief plate (6) overlaps the top plate (3), and the pressure relief plate (6) forms an angle of 75°-80° with the horizontal plane.

6. The explosion-proof electrical cabinet as described in claim 5, characterized in that: The pressure relief plate (6) has a bent part at the movable end. Under normal conditions, the bent part is in contact with the top plate (3) of the explosion-proof box.

7. The explosion-proof electrical cabinet as described in claim 3, characterized in that: The lower end of the pressure relief plate (6) is hinged to the top of the cabinet (10) via a hinge (7).

8. The explosion-proof electrical cabinet as described in claim 4, characterized in that: A proximity switch is fixedly installed on the top plate (3). The proximity switch is electrically connected to a buzzer. When the movable end of the pressure relief plate (6) rotates away from the top plate (3), the state of the proximity switch changes and triggers the buzzer to operate.

9. The explosion-proof electrical cabinet as described in claim 4, characterized in that: The lower end of the pressure relief plate (6) is 10cm-20cm away from the rear edge of the top of the cabinet (10).

10. An explosion-proof electrical cabinet as described in any one of claims 1-9, characterized in that: Multiple through holes (9) are provided in the thickness direction of the pressure relief plate (6).

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