CN211720856U - Positive pressure type explosion-proof cabinet - Google Patents
Positive pressure type explosion-proof cabinet Download PDFInfo
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- CN211720856U CN211720856U CN202020092146.4U CN202020092146U CN211720856U CN 211720856 U CN211720856 U CN 211720856U CN 202020092146 U CN202020092146 U CN 202020092146U CN 211720856 U CN211720856 U CN 211720856U
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Abstract
The utility model relates to a positive pressure explosion-proof cabinet, which comprises a cabinet body, wherein the cabinet body comprises a rectangular frame body, a middle clapboard is arranged in the rectangular frame body, and the middle clapboard divides the inner space of the rectangular frame body into an electrical installation cavity positioned at the upper side and an explosion-proof cavity positioned at the lower side; an air pipe is arranged in the electric appliance mounting cavity, and a positive pressure air supply device is arranged in the explosion-proof cavity; an operation window is also arranged on the rectangular frame body, and a cover plate assembly is arranged on the operation window; the cover plate assembly comprises a sealing door body, a sealing ring surrounding the operation window is arranged on the side face, facing the sealing door body, of the rectangular frame body, and a sealing gasket assembly is arranged between the sealing ring and the sealing door body; the sealing door body extends to the outer side of the sealing ring and is fixed on the rectangular frame body through the explosion-proof connecting piece. The sealing connection structure of the sealing door body and the rectangular frame body is reasonable and novel, the openability of the sealing door body can be realized, and meanwhile, the sealing effect is good.
Description
Technical Field
The utility model relates to the technical field of electrical equipment, especially, relate to positive pressure type explosion-proof cabinet.
Background
The explosion-proof cabinet is a box body used for installing an electrical control assembly, is applied to the environment of a mining area and a dust working condition, and is used for avoiding the damage of the control assembly arranged inside due to the impact of external force. The instrument, the instrument and the touch screen which do not have the explosion-proof function are arranged in the explosion-proof cabinet with the explosion-proof function, so that the explosion-proof requirement is met, and the installation and the use of the instrument, the touch screen and other instruments which do not have the explosion-proof function in the flammable and explosive area are realized. The existing explosion-proof cabinet has poor sealing performance and still has explosion risks, and the improvement is still needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a positive pressure type explosion-proof cabinet that rational in infrastructure and sealing performance are good is provided.
In order to solve the technical problem, the technical scheme of the utility model is that: the positive pressure type explosion-proof cabinet comprises a cabinet body, wherein the cabinet body comprises a rectangular frame body, a middle partition plate is arranged in the rectangular frame body, and the middle partition plate divides the inner space of the rectangular frame body into an electrical appliance installation cavity positioned on the upper side and an explosion-proof cavity positioned on the lower side; an air pipe is arranged in the electric appliance installation cavity, and a positive pressure air supply device is arranged in the explosion-proof cavity; the rectangular frame body is also provided with an operation window, and a cover plate assembly is arranged on the operation window; the cover plate assembly comprises a sealing door body, a sealing ring surrounding the operation window is arranged on the side face, facing the sealing door body, of the rectangular frame body, and a sealing gasket assembly is arranged between the sealing ring and the sealing door body; the sealing door body extends towards the outer side of the sealing ring and is fixed on the rectangular frame body through an explosion-proof connecting piece.
As a preferred technical scheme, the rectangular frame body comprises a left baffle and a right baffle, the upper ends of the left baffle and the right baffle are connected in a sealing manner through an upper baffle, and the lower ends of the left baffle and the right baffle are connected in a sealing manner through a lower baffle; the electric appliance installation cavity is characterized by further comprising an intermediate baffle, wherein two ends of the intermediate baffle are respectively in sealing connection with the left baffle and the right baffle, the intermediate baffle divides the operation window into an upper window and a lower window, the upper window corresponds to the electric appliance installation cavity, and the lower window corresponds to the explosion-proof cavity.
Preferably, the seal ring includes a first seal portion connected to the rectangular frame and extending inward of the rectangular frame, a second seal portion extending outward of the rectangular frame is provided at an inner end edge of the first seal portion, and both the first seal portion and the second seal portion are annular; the middle baffle is U-shaped.
According to the preferable technical scheme, the sealing gasket assembly corresponding to the upper window comprises a sealing strip sleeved on the sealing ring far away from the rectangular frame body, and a sealing gasket is arranged at the corresponding position of the sealing door body and the sealing ring.
Preferably, the front side and the rear side of the rectangular frame are symmetrically arranged.
As a preferred technical scheme, the explosion-proof connecting piece comprises a screw sheath fixed on the rectangular frame body, and the screw sheath is welded and fixed on the inner side surface of the rectangular frame body; a through hole is formed in the rectangular frame body corresponding to the position of the screw sheath, the screw sheath is provided with a counter bore communicated with the through hole, and an internal thread is formed in the inner wall of the counter bore; the sealing door body is fixed on the rectangular frame body through bolts screwed with the internal threads of the counter bores.
As a preferred technical scheme, the sealing door body is provided with an inward flange, and the inward flange is located on the outer side of the bolt.
According to a preferable technical scheme, the positive pressure air supply device comprises a quick-connection plug, a filtering and reducing valve is arranged at the downstream end of the quick-connection plug, and a hand valve is arranged on the upstream side of the filtering and reducing valve; an explosion-proof electromagnetic valve is arranged between the air pipe and the quick-connection connector and is electrically connected with an explosion-proof controller.
As a preferred technical scheme, an explosion-proof illuminating lamp is arranged in the electric appliance mounting cavity; an explosion-proof audible and visual alarm is arranged on the outer side of the upper end of the cabinet body; and a micro-pressure difference transmitter is arranged in the electric appliance mounting cavity.
According to the preferable technical scheme, the inner walls of the left side and the right side of the electric appliance installation cavity are respectively fixedly welded with a back plate fixing beam, a back plate fixing frame is arranged between the two back plate fixing beams, and a back plate is fixed on the back plate fixing frame.
By adopting the technical scheme, the positive pressure type explosion-proof cabinet is reasonable in structure and good in sealing effect. The positive pressure state of the electric appliance installation cavity is maintained through the positive pressure air supply device, and the combustible gas is prevented from entering the electric appliance installation cavity to cause explosion. The sealing connection structure of the sealing door body and the rectangular frame body is reasonable and novel, the openability of the sealing door body can be realized, and meanwhile, the sealing effect is good.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a cross-sectional view of section B-B of FIG. 1;
FIG. 3 is a schematic structural view of a rectangular frame;
FIG. 4 is a top view of FIG. 1;
fig. 5 is a partially enlarged view of the region C in fig. 2.
Detailed Description
As shown in fig. 1, fig. 2 and fig. 3, the positive pressure type explosion-proof cabinet comprises a cabinet body, the cabinet body comprises a rectangular frame body 1, the rectangular frame body comprises a left baffle 20 and a right baffle 22, the upper ends of the left baffle 20 and the right baffle 22 are hermetically connected through an upper baffle 21, and the lower ends of the left baffle 20 and the right baffle 22 are hermetically connected through a lower baffle 18. Preferably, the left baffle 20, the right baffle 22, the upper baffle 21 and the lower baffle 18 are formed by stamping and bending a sheet material, and the sheet material can be made of stainless steel, carbon steel and the like. The joints of the left baffle 20, the right baffle 22, the upper baffle 21 and the lower baffle 18 are fully welded to form sealed connection.
A middle partition plate 15 is arranged in the rectangular frame body 1, and the middle partition plate 15 divides the inner space of the rectangular frame body 1 into an electrical appliance installation cavity 13 positioned on the upper side and an explosion-proof cavity 16 positioned on the lower side; the air pipe 11 is arranged in the electric appliance installation cavity 13, and the positive pressure air supply device is arranged in the explosion-proof cavity 16. The positive pressure air supply device comprises a quick connector 5, and the quick connector 5 is connected with air input equipment such as an air storage tank or an air pump. A filtering and reducing valve 7 is arranged at the downstream end of the quick connector 5, and a hand valve 6 is arranged on the upstream side of the filtering and reducing valve 7; an explosion-proof electromagnetic valve 8 is arranged between the air pipe 11 and the quick connector 5, and the explosion-proof electromagnetic valve 8 is electrically connected with an explosion-proof controller 17.
The rectangular frame body 1 is further provided with an operation window, optimally, the rectangular frame body 1 is symmetrical in the front and back direction, the front side face and the back side face of the rectangular frame body 1 are both provided with the operation window, and the operation window is provided with a cover plate assembly 4. Preferably, the explosion-proof door further comprises a middle baffle plate 19, two ends of the middle baffle plate 19 are respectively connected with the left baffle plate 20 and the right baffle plate 22 in a sealing mode, the middle baffle plate 19 divides the operation window into an upper window 23 and a lower window 24, the upper window 23 corresponds to the electric appliance installation cavity 13, and the lower window 24 corresponds to the explosion-proof cavity 16. Correspondingly, the cover plate assembly 4 comprises a sealing door body 30, and the sealing door body 30 comprises an upper cover plate 10 covering the upper window 23 and a lower cover plate 9 covering the lower window 24. The upper cover plate 10 has a large area, and reinforcing ribs 3 are fixed to the inner side surface of the upper cover plate 10 to reinforce the rigidity thereof and ensure an ideal sealing effect.
As shown in fig. 5, the sealing ring includes a first sealing portion 34 connected to the rectangular frame 1 and extending toward the inside of the rectangular frame 1, a second sealing portion 35 extending toward the outside of the rectangular frame 1 is provided at an inner end edge of the first sealing portion 34, and both the first sealing portion 34 and the second sealing portion 35 are annular; the intermediate baffle 15 is U-shaped. A sealing gasket assembly is arranged between the sealing door 30 and the sealing ring. Preferably, as the upper cover plate 10 has a large area and is opened frequently, the sealing strip 33 is sleeved at one end of the sealing ring corresponding to the position of the upper cover plate 10, which is far away from the rectangular frame 1; a sealing gasket 31 is arranged at the corresponding position of the sealing ring; only the packing 31 may be provided between the lower cover plate 9 and the seal ring.
The sealing door 30 extends to the outside of the sealing ring and is fixed to the rectangular frame 1 by an explosion-proof connector. The explosion-proof connecting piece comprises a screw sheath 29 fixed on the rectangular frame body 1, and the screw sheath 29 is welded and fixed on the inner side surface of the rectangular frame body 1; a through hole is formed in the rectangular frame body 1 corresponding to the position of the screw sheath 29, the screw sheath 29 is provided with a counter bore communicated with the through hole, and an internal thread is formed on the inner wall of the counter bore; the sealing door 30 is fixed to the rectangular frame 1 by bolts screwed to the internal threads of the counter bores.
Preferably, the sealing door body 30 is provided with an inner flange 32, the inner flange 32 being located outside the bolt.
An explosion-proof illuminating lamp 12 is arranged in the electric appliance mounting cavity 13; an explosion-proof audible and visual alarm 2 is arranged on the outer side of the upper end of the cabinet body. A micro differential pressure transmitter 14 is arranged in the electric appliance mounting cavity 13, and a gas taking pipe of the micro differential pressure transmitter takes gas from the explosion-proof cavity 16.
As shown in fig. 4, back plate fixing beams 27 are respectively welded and fixed on the left inner wall and the right inner wall of the electrical installation cavity 13, a back plate fixing frame 25 is arranged between the two back plate fixing beams 27, a back plate 26 is fixed on the back plate fixing frame 25, and the back plate 26 is used for fixing electrical components. The back plate fixing beam 27 is welded and fixed with the left baffle 20 and the right baffle 22, connecting holes are not needed, and the risk of air leakage can be reduced.
The basic principles, main features and advantages of the present invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. Positive pressure type explosion-proof cabinet, including the cabinet body, its characterized in that: the cabinet body comprises a rectangular frame body, a middle partition plate is arranged in the rectangular frame body, and the middle partition plate divides the inner space of the rectangular frame body into an electrical appliance installation cavity positioned on the upper side and an explosion-proof cavity positioned on the lower side; an air pipe is arranged in the electric appliance installation cavity, and a positive pressure air supply device is arranged in the explosion-proof cavity; the rectangular frame body is also provided with an operation window, and a cover plate assembly is arranged on the operation window; the cover plate assembly comprises a sealing door body, a sealing ring surrounding the operation window is arranged on the side face, facing the sealing door body, of the rectangular frame body, and a sealing gasket assembly is arranged between the sealing ring and the sealing door body; the sealing door body extends towards the outer side of the sealing ring and is fixed on the rectangular frame body through an explosion-proof connecting piece.
2. A positive pressure explosion vent cabinet according to claim 1, wherein: the rectangular frame body comprises a left baffle and a right baffle, the upper ends of the left baffle and the right baffle are connected in a sealing mode through an upper baffle, and the lower ends of the left baffle and the right baffle are connected in a sealing mode through a lower baffle; the electric appliance installation cavity is characterized by further comprising an intermediate baffle, wherein two ends of the intermediate baffle are respectively in sealing connection with the left baffle and the right baffle, the intermediate baffle divides the operation window into an upper window and a lower window, the upper window corresponds to the electric appliance installation cavity, and the lower window corresponds to the explosion-proof cavity.
3. A positive pressure explosion vent cabinet according to claim 2, wherein: the sealing ring comprises a first sealing part which is connected with the rectangular frame body and extends towards the inner side of the rectangular frame body, a second sealing part which extends towards the outer side of the rectangular frame body is arranged at the edge of the inner end of the first sealing part, and the first sealing part and the second sealing part are both annular; the middle baffle is U-shaped.
4. A positive pressure explosion vent cabinet according to claim 2, wherein: and the sealing gasket assembly corresponding to the upper window comprises a sealing strip sleeved on the sealing ring and far away from the rectangular frame body, and a sealing gasket is arranged at the corresponding position of the sealing ring position of the sealing door body.
5. A positive pressure explosion vent cabinet according to claim 1, wherein: the front side and the back side of the rectangular frame body are symmetrically arranged.
6. A positive pressure explosion vent cabinet according to claim 1, wherein: the explosion-proof connecting piece comprises a screw sheath fixed on the rectangular frame body, and the screw sheath is welded and fixed on the inner side surface of the rectangular frame body; a through hole is formed in the rectangular frame body corresponding to the position of the screw sheath, the screw sheath is provided with a counter bore communicated with the through hole, and an internal thread is formed in the inner wall of the counter bore; the sealing door body is fixed on the rectangular frame body through bolts screwed with the internal threads of the counter bores.
7. A positive pressure explosion proof cabinet according to claim 6, wherein: the sealing door body is provided with an inward flange, and the inward flange is located on the outer side of the bolt.
8. A positive pressure explosion vent cabinet according to claim 1, wherein: the positive pressure air supply device comprises a quick-connection plug, a filtering and reducing valve is arranged at the downstream end of the quick-connection plug, and a hand valve is arranged on the upstream side of the filtering and reducing valve; an explosion-proof electromagnetic valve is arranged between the air pipe and the quick-connection connector and is electrically connected with an explosion-proof controller.
9. A positive pressure explosion vent cabinet according to claim 1, wherein: an explosion-proof illuminating lamp is arranged in the electric appliance mounting cavity; an explosion-proof audible and visual alarm is arranged on the outer side of the upper end of the cabinet body; and a micro-pressure difference transmitter is arranged in the electric appliance mounting cavity.
10. A positive pressure explosion vent cabinet according to claim 1, wherein: the back plate fixing device is characterized in that back plate fixing beams are respectively welded and fixed on the inner wall of the left side and the inner wall of the right side of the electric appliance mounting cavity, a back plate fixing frame is arranged between the two back plate fixing beams, and a back plate is fixed on the back plate fixing frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020092146.4U CN211720856U (en) | 2020-01-16 | 2020-01-16 | Positive pressure type explosion-proof cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020092146.4U CN211720856U (en) | 2020-01-16 | 2020-01-16 | Positive pressure type explosion-proof cabinet |
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| Publication Number | Publication Date |
|---|---|
| CN211720856U true CN211720856U (en) | 2020-10-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020092146.4U Active CN211720856U (en) | 2020-01-16 | 2020-01-16 | Positive pressure type explosion-proof cabinet |
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| Country | Link |
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| CN (1) | CN211720856U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112864929A (en) * | 2021-01-21 | 2021-05-28 | 何少谷 | Positive pressure type explosion-proof power distribution cabinet and use method thereof |
| CN113194642A (en) * | 2021-04-23 | 2021-07-30 | 中国成达工程有限公司 | Secondary protection box and secondary protection method for electrical equipment |
-
2020
- 2020-01-16 CN CN202020092146.4U patent/CN211720856U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112864929A (en) * | 2021-01-21 | 2021-05-28 | 何少谷 | Positive pressure type explosion-proof power distribution cabinet and use method thereof |
| CN113194642A (en) * | 2021-04-23 | 2021-07-30 | 中国成达工程有限公司 | Secondary protection box and secondary protection method for electrical equipment |
| CN113194642B (en) * | 2021-04-23 | 2024-05-14 | 中国成达工程有限公司 | Secondary protection box and secondary protection method for electrical equipment |
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