CN113853087B

CN113853087B - Explosion-proof box

Info

Publication number: CN113853087B
Application number: CN202110909892.7A
Authority: CN
Inventors: 李伯汝; 赖涛; 郭茹; 石晶; 蔡昊良; 周芳华
Original assignee: GCI Science and Technology Co Ltd
Current assignee: GCI Science and Technology Co Ltd
Priority date: 2021-08-09
Filing date: 2021-08-09
Publication date: 2023-06-02
Anticipated expiration: 2041-08-09
Also published as: CN113853087A

Abstract

The invention relates to the technical field of electrical equipment and discloses an explosion-proof box which comprises a bottom shell, a cover body and a sealing ring, wherein the bottom shell is detachably connected with the cover body; the bottom shell is provided with a first sealing groove, the cover body is provided with a second sealing groove, and the sealing rings are accommodated in the first sealing groove and the second sealing groove; a placing table is arranged on the bottom wall of the first sealing groove, the second sealing groove is arranged opposite to the placing table, and the sealing ring is in interference fit with the first sealing groove and the second sealing groove; the cable adapter plate is arranged in the sealing bin, waterproof glue is filled in the sealing bin, and the cable adapter plate is used for being connected with a cable. The invention can reduce the distortion of the sealing ring during installation, effectively protect the cable part through the sealing glue, further improve the dustproof and waterproof capacity of the explosion-proof box, and enable the explosion-proof box to reach the protection level of IP 68.

Description

Explosion-proof box

Technical Field

The invention relates to the technical field of electrical equipment, in particular to an explosion-proof box.

Background

At present, a large number of intelligent terminal devices of the Internet of things can be used in industries such as water affairs, fuel gas and the like so as to monitor the overall working state of a platform. For the core processing on-board part of the terminal equipment, it is usually installed in an explosion proof box.

In an actual use environment, the terminal equipment is often affected by water immersion and dust. When moisture and dust continuously enter the explosion-proof box through a gap between the explosion-proof box shell and the cover plate, excessive moisture and dust accumulate, overheat, short circuit and even burnout of circuits and devices can be caused, and therefore the circuit system of the equipment cannot work normally. In particular, in flammable and explosive environments, tiny spark leakage can cause accidents such as explosion and fire in site environments.

The joint of the shell and the cover plate of the traditional explosion-proof box generally uses a sealing gasket with a common circular cross section, and the sealing gasket is easy to distort and deform during installation and can not keep good tight contact and sealing performance, so that moisture and dust invade into the explosion-proof box. Therefore, an explosion-proof box with high dustproof and waterproof grade needs to be designed, and the electric system inside the explosion-proof box is ensured not to be influenced by external environmental conditions such as moisture, dust and the like.

Disclosure of Invention

The invention provides an explosion-proof box, which can reduce distortion when a sealing ring is installed, so as to improve the dustproof and waterproof capacity of the explosion-proof box and protect an electrical system inside the explosion-proof box from moisture and dust.

In order to solve the technical problems, the invention provides an explosion-proof box, which comprises a bottom shell, a cover body and a sealing ring, wherein the bottom shell is detachably connected with the cover body; the bottom shell is provided with a first sealing groove, the cover body is provided with a second sealing groove, and the sealing rings are accommodated in the first sealing groove and the second sealing groove; a placing table is arranged on the bottom wall of the first sealing groove, the second sealing groove is arranged opposite to the placing table, and the sealing ring is in interference fit with the first sealing groove and the second sealing groove;

the cable adapter plate is arranged in the sealing bin, waterproof glue is filled in the sealing bin, and the cable adapter plate is used for being connected with a cable.

Optionally, the protruding direction of placing the platform is towards second seal groove, the shape of sealing washer corresponds with placing the platform.

Optionally, at least one boss is arranged on the sealing ring, and the boss is in interference fit with the first sealing groove or the second sealing groove.

Optionally, at least one partition board is fixedly arranged in the sealed cabin, and the partition board is used for separating the sealed cabin.

Optionally, the explosion-proof box further comprises a transparent window, a positioning retainer ring, a sealing step and explosion-proof glass, wherein the transparent window is fixedly arranged on the cover body, the sealing step and the positioning retainer ring are sequentially arranged on the periphery of the transparent window in a surrounding manner from inside to outside, and the explosion-proof glass is fixedly arranged on the sealing step.

Optionally, the explosion-proof box further comprises a glass fixing plate, the glass fixing plate is fixedly connected with the cover body, one side of the explosion-proof glass is fixedly arranged on the sealing step, and the other side of the explosion-proof glass is in butt joint with the glass fixing plate.

Optionally, a glue-beating gap groove is arranged between the positioning retainer ring and the glue sealing step.

Optionally, the bottom shell is detachably connected with the cover body through a locking screw.

Optionally, a first screw hole is formed in the bottom shell, a second screw hole is formed in the cover body, and the length of the anti-loosening screw is smaller than or equal to the sum of the lengths of the first screw hole and the second screw hole.

Compared with the prior art, the invention has the following beneficial effects:

the invention provides an explosion-proof box which comprises a bottom shell, a cover body and a sealing ring, wherein the bottom shell is detachably connected with the cover body; the bottom shell is provided with a first sealing groove, the cover body is provided with a second sealing groove, and the sealing rings are accommodated in the first sealing groove and the second sealing groove; a placing table is arranged on the first sealing groove, the second sealing groove is arranged opposite to the placing table, and the sealing ring is in interference fit with the first sealing groove and the second sealing groove; the cable adapter plate is arranged in the sealing bin, waterproof glue is filled in the sealing bin, and the cable adapter plate is used for being connected with a cable. The first sealing groove is provided with the placing table, so that the sealing ring can be stably installed on the placing table, and further distortion of the sealing ring during installation is reduced; the external cable is connected into the cable adapter plate, and then waterproof glue is filled in the sealing bin, so that the cable part can be effectively protected through the sealing glue, the protection effect is much better than that of a waterproof pad of a common sealing cable fixing headrest, the dustproof waterproof capability of the explosion-proof box is further improved, an electric system inside the explosion-proof box is protected from moisture and dust, and the explosion-proof box can reach the protection level of IP 68.

Drawings

FIG. 1 is a schematic view of the overall structure of an explosion-proof tank provided by an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of an explosion proof tank provided by an embodiment of the present invention;

FIG. 3 is an enlarged partial schematic view at A in FIG. 2;

FIG. 4 is another schematic cross-sectional view of an explosion proof tank provided by an embodiment of the present invention;

fig. 5 is a schematic structural view of a cover body in an explosion-proof case according to an embodiment of the present invention;

FIG. 6 is a schematic view of the structure of an explosion-proof glass in an explosion-proof box according to an embodiment of the present invention after being installed;

FIG. 7 is a schematic cross-sectional view of a cover in an explosion proof tank according to an embodiment of the present invention;

FIG. 8 is an enlarged partial schematic view at B in FIG. 7;

fig. 9 is a schematic structural view of a bottom case in an explosion-proof case according to an embodiment of the present invention.

Wherein, the reference numerals are as follows: 1. a bottom case; 1a, a first sealing groove; 1b, a placing table; 1c, a first screw hole; 2. a cover body; 2a, positioning a retainer ring; 2aa, sealing the glue step; 2b, gluing a gap groove; 2c, a second sealing groove; 2d, a second screw hole; 3. a transparent window; 4. explosion-proof glass; 5. a glass fixing plate; 6. a cable fixing head; 6a, a cable; 7. a seal ring; 7a, a boss; 8. sealing the bin; 9. a cable patch panel; 9a, a separator; 10. waterproof glue; 11. a desiccant container; 12. and (5) an anti-loosening screw.

Detailed Description

The following description of the embodiments of the present invention 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 invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1-3, an explosion-proof box provided by the embodiment of the invention comprises a bottom shell 1, a cover body 2 and a sealing ring 7, wherein the bottom shell 1 is detachably connected with the cover body 2; the bottom shell 1 is provided with a first sealing groove 1a, the cover body 2 is provided with a second sealing groove 2c, and the sealing ring 7 is accommodated in the first sealing groove 1a and the second sealing groove 2 c; a placing table 1b is arranged on the bottom wall of the first sealing groove 1a, a second sealing groove 2c is arranged opposite to the placing table 1b, and a sealing ring 7 is in interference fit with the first sealing groove 1a and the second sealing groove 2 c.

In this embodiment, because be equipped with on the first seal groove 1a and place the platform 1b, sealing washer 7 can be stably installed on placing the platform 1b, and then reduce the distortion when sealing washer 7 installs to improve explosion-proof case's dustproof waterproof ability, the inside electrical system of protection explosion-proof case does not receive moisture, dust influence. Meanwhile, the sealing ring 7 is in interference fit with the first sealing groove 1a and the second sealing groove 2c, the end face of the sealing ring 7 after installation is higher than the contact surface of the bottom shell 1 and the cover body 2, a water blocking layer can be formed, and external moisture and dust are effectively prevented from invading the inside of the explosion-proof box.

Referring to fig. 1, a desiccant container 11 is provided in the bottom case 1, the desiccant container 11 is used for placing a desiccant, and the desiccant can absorb minute moisture in the explosion-proof box and keep the inside of the explosion-proof box dry.

Referring to fig. 2 and 3, in a preferred example of the present embodiment, the placement base 1b is substantially V-shaped, the second seal groove 2c is substantially V-shaped in cross section, the seal ring 7 is V-shaped in cross section at the middle, and the seal ring 7 can be stably mounted on the placement base 1 b. In other embodiments, the placement table 1b may be trapezoidal, square, or the like, as long as the protruding direction of the placement table 1b faces the second seal groove 2c, and the shapes of the second seal groove 2c and the seal ring 7 correspond to the placement table 1 b. The sealing ring 7 can be made of silicon rubber with the hardness of 50-60, the middle part of the sealing ring 7 is approximately V-shaped, a water blocking layer can be formed, and external moisture and dust can be effectively prevented from entering.

Referring to fig. 3, further, at least one boss 7a is provided on the seal ring 7, and the boss 7a is in interference fit with the first seal groove 1a or the second seal groove 2 c. In this embodiment, four bosses 7a are symmetrically disposed on the upper and lower surfaces of the seal ring 7. The boss 7a may be connected to the seal ring 7 by adhesion or the like, and may be integrally formed with the seal ring 7. The boss 7a can make the sealing washer 7 and first seal groove 1a, second seal groove 2c between closer contact, when the reduction is because of the planarization that processing caused is not enough, the sealing washer 7 contacts the defect that compactness is not enough with first seal groove 1a, second seal groove 2c, has further promoted the dustproof waterproof ability of explosion-proof case. In other embodiments, the boss 7a may be one, two, etc., which will not be described herein.

Referring to fig. 4, a bottom case 1 and a cover 2 are detachably connected by a locking screw 12, a first screw hole 1c is provided in the bottom case 1, and a second screw hole 2d is provided in the cover 2. In this embodiment, the locking screw 12 is a slim rod screw, and when the cover needs to be maintained, the locking screw 12 is removed from the threaded region in the first screw hole 1c, at which time the cover 2 can be removed. Because the second screw hole 2d is internally provided with the unthreaded area, the unthreaded area allows the thin rod part of the anti-loosening screw 12 to pass through, and the threaded part of the anti-loosening screw 12 can be separated only under the condition of being completely concentric with the threaded area in the second screw hole 2d, and the two ends of the thin rod of the anti-loosening screw 12 are respectively provided with a screw cap and a threaded part, so that the anti-loosening screw 12 cannot fall off from the cover body 2, and the anti-loosening screw is convenient to install and maintain.

Referring to fig. 4, the length of the anti-loosening screw 12 is smaller than the sum of the lengths of the first screw hole 1c and the second screw hole 2d, when the cover 2 is mounted on the bottom shell 1, the cover 2 is not jacked up due to the overlong anti-loosening screw 12, the tightness of the assembled bottom shell 1 and the assembled cover 2 is further improved, and meanwhile, the assembly efficiency is improved. In other embodiments, the length of the locking screw 12 may be equal to the sum of the lengths of the first screw hole 1c and the second screw hole 2d.

Referring to fig. 5 and 6, a transparent window 3, a positioning retainer ring 2a, a sealing step 2aa and an explosion-proof glass 4 are arranged on the cover body 2, the transparent window 3 is fixedly arranged in the middle of the cover body 2, and the sealing step 2aa and the positioning retainer ring 2a are sequentially arranged around the periphery of the transparent window 3 from inside to outside. The explosion-proof glass 4 one side is fixedly arranged on the sealing rubber step 2aa through bonding, when the explosion-proof glass 4 is installed, the positioning check ring 2a can assist in positioning, and when the sealing rubber is coated, the sealing rubber can be uniformly coated in the range of the positioning check ring 2 a.

Referring to fig. 7 and 8, preferably, a glue gap groove 2b is provided between the positioning retainer ring 2a and the glue sealing step 2 aa. During installation, the explosion-proof glass 4 can be placed in the positioning retainer ring 2a, and then the sealant is driven into the sealant slot 2b, so that the sealant can uniformly flow through the sealant slot 2b, and further, the combination end face of the explosion-proof glass 4 and the sealant step 2aa can form good sealing.

Referring to fig. 6, a glass fixing plate 5 is fixedly coupled to the cover 2. After the sealant is coated, the glass fixing plate 5 can be fixed through fasteners such as screws, so that the glass fixing plate 5 can be pressed against the explosion-proof glass 4, and the situation that the explosion-proof glass 4 is not stable enough when being singly adhered and fixed by using the sealant can be avoided, and therefore the explosion-proof glass 4 can be prevented from being separated from a fixed position after being impacted by external force, and the sealing performance is improved.

Referring to fig. 9, a sealing cabin 8 and a cable adapter plate 9 are arranged in the bottom shell 1, and the sealing cabin 8 is a cabin arranged in the bottom shell 1, can be formed by enclosing with waterproof materials, and can also be integrally formed with the bottom shell 1. The cable adapter plate 9 is installed in the sealing bin 8, and the cable 6a is connected to a corresponding interface of the cable adapter plate 9 through the cable fixing head 6. After the cable 6a is connected, waterproof glue 10 can be filled in the sealing bin 8, and the waterproof glue 10 can be made of two-component electronic silica gel, or other waterproof rubber or waterproof silica gel. The double-component electronic silica gel has the characteristics of good sealing performance, good insulating performance, good heat conductivity coefficient and softer hardness, and can well seal the gap at the lead-in position of the cable 6 a. The double-component electronic silica gel is softer after being dried, can fix and protect the cable 6a, and cannot cause the cable 6a connector to fall off due to excessive stress pulling on the cable 6a wrapped by the glue because the common epoxy resin glue is too hard after being cured; meanwhile, the double-component electronic silica gel is easy to remove, the subsequent cable 6a is convenient to replace, and maintainability is improved.

Referring to fig. 9, a partition 9a is fixedly arranged in the sealed cabin 8, and the partition 9a divides the sealed cabin 8 into two independent cabin spaces. The design of independent bin can be after maintaining and changing cable 6a, when the waterproof glue 10 is filled in the embedment again, the quantity of the lost glue is less, and the time of the solidification and the shaping of a small amount of glue is also shorter. In other embodiments, a plurality of partitions 9a may be provided to divide the sealed compartment 8 into a plurality of independent compartments. For example, two partitions 9a are provided to divide the seal cartridge 8 into four independent spaces, to which the present invention is not limited.

In this embodiment, since the first seal groove 1a is provided with the placement table 1b, the seal ring 7 can be stably mounted on the placement table 1b, so as to reduce distortion when the seal ring 7 is mounted; meanwhile, the sealing ring 7 is in interference fit with the first sealing groove 1a and the second sealing groove 2c, the end face of the sealing ring 7 after installation is higher than the contact surface of the bottom shell 1 and the cover body 2, a water blocking layer can be formed, and external moisture and dust are effectively prevented from invading the inside of the explosion-proof box. The external cable 6a is connected to the cable adapter plate 9, and then the waterproof adhesive 10 is filled in the sealing bin 8, so that the cable plug part can be effectively protected through the sealing adhesive, the cable part is not affected even if water enters the cavity, the protection effect is better than that of a common sealing cable fixing headrest self waterproof pad, the dustproof waterproof capability of the explosion-proof box is further improved, the electric system inside the explosion-proof box is protected from moisture and dust, and the explosion-proof box can reach the protection level of IP 68.

The foregoing embodiments have been provided for the purpose of illustrating the general principles of the present invention, and are not to be construed as limiting the scope of the invention. It should be noted that any modifications, equivalent substitutions, improvements, etc. made by those skilled in the art without departing from the spirit and principles of the present invention are intended to be included in the scope of the present invention.

Claims

1. The explosion-proof box is characterized by comprising a bottom shell, a cover body and a sealing ring, wherein the bottom shell is detachably connected with the cover body; the bottom shell is provided with a first sealing groove, the cover body is provided with a second sealing groove, and the sealing rings are accommodated in the first sealing groove and the second sealing groove; a placing table is arranged on the bottom wall of the first sealing groove, the second sealing groove is arranged opposite to the placing table, and the sealing ring is in interference fit with the first sealing groove and the second sealing groove;

the cable adapter plate is arranged in the sealing bin, waterproof glue is filled in the sealing bin, and the cable adapter plate is used for being connected with a cable;

the anti-explosion box further comprises a transparent window, a positioning check ring, a sealing step and anti-explosion glass, wherein the transparent window is fixedly arranged on the cover body, the sealing step and the positioning check ring are sequentially arranged on the periphery of the transparent window in a surrounding mode from inside to outside, the anti-explosion glass is fixedly arranged on the sealing step, and the anti-explosion glass is arranged in the positioning check ring.

2. The explosion-proof tank according to claim 1, wherein the protruding direction of the placement table faces the second seal groove, and the second seal groove and the seal ring are shaped corresponding to the placement table.

3. The explosion proof case of claim 2, wherein at least one boss is provided on the seal ring, the boss being in interference fit with the first seal groove or the second seal groove.

4. The explosion proof box of claim 1, wherein at least one partition is fixedly arranged in the sealed bin, and the partition is used for separating the sealed bin.

5. The explosion-proof box according to claim 1, further comprising a glass fixing plate fixedly connected with the cover body, wherein one side of the explosion-proof glass is fixedly arranged on the sealing step, and the other side of the explosion-proof glass is abutted with the glass fixing plate.

6. The explosion proof box of claim 5, wherein a glue gap groove is arranged between the positioning retainer ring and the glue sealing step.

7. The explosion proof case according to any one of claims 1 to 6, wherein the bottom case and the cover are detachably connected by a locking screw.

8. The explosion-proof box according to claim 7, wherein the bottom shell is provided with a first screw hole, the cover body is provided with a second screw hole, and the length of the anti-loosening screw is smaller than or equal to the sum of the lengths of the first screw hole and the second screw hole.