CN110661227A - Cable lead-in device and explosion-proof equipment - Google Patents
Cable lead-in device and explosion-proof equipment Download PDFInfo
- Publication number
- CN110661227A CN110661227A CN201910636477.1A CN201910636477A CN110661227A CN 110661227 A CN110661227 A CN 110661227A CN 201910636477 A CN201910636477 A CN 201910636477A CN 110661227 A CN110661227 A CN 110661227A
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- China
- Prior art keywords
- hole
- cable
- explosion
- elastic sealing
- sealing layer
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/013—Sealing means for cable inlets
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- Insertion, Bundling And Securing Of Wires For Electric Apparatuses (AREA)
- Cable Accessories (AREA)
Abstract
The invention discloses a cable leading-in device and an explosion-proof device, which comprise a support body, a compression connecting piece and an elastic sealing piece, wherein the support body is provided with a first through hole, and a support bulge is arranged in the first through hole; the pressing connecting piece is arranged in the first through hole and is in threaded connection with the support body, and a second through hole which is coaxial with the first through hole is formed in the pressing connecting piece; the elastic sealing element is filled in the first through hole, two ends of the elastic sealing element are respectively abutted against the compression connecting piece and the supporting protrusion, a third through hole is formed in the elastic sealing element and is coaxially arranged with the second through hole, a sealing layer capable of being broken through by poking is arranged in the third through hole, and the sealing layer is used for plugging the third through hole. Before the cable is not connected, the sealing layer can realize complete isolation between the interior of the explosion-proof equipment and the outside; after the cables are connected, the elastic sealing element can realize the fixation and sealing of the cables.
Description
Technical Field
The invention relates to the technical field of explosion-proof equipment, in particular to a cable leading-in device and explosion-proof equipment.
Background
The equipment used in the explosive area needs to have better explosion-proof performance so as to meet the use requirements of high-risk flammable and explosive environments. The sealing performance of the cable inlet of the explosion-proof equipment has a crucial influence on the explosion-proof performance of the explosion-proof equipment, because once an explosion occurs in the explosion-proof equipment, flame can penetrate through the cable inlet to detonate the explosive gas around the equipment, thereby causing a safety accident.
In the explosion-proof equipment in the prior art, the cable penetrates into the shell from the through hole of the shell of the explosion-proof equipment, and then the fixed connection between the cable and the shell is realized through glue, but in the glue injection process, the glue easily overflows to the explosion-proof surface (namely the outer surface of the shell) of the shell along the cable, so that the explosion-proof performance of the shell is influenced. Furthermore, the use of glue to connect the cable and the housing also makes later maintenance of the explosion-proof equipment inconvenient.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the cable leading-in device and the explosion-proof equipment have good sealing performance and explosion-proof performance, and can facilitate later maintenance of the explosion-proof equipment.
In order to solve the technical problems, the invention adopts the technical scheme that:
a cable lead-in device comprising:
the supporting body is provided with a first through hole, and a supporting bulge is arranged on the hole wall of the first through hole;
the pressing connecting piece is arranged in the first through hole and is in threaded connection with the support body, a second through hole is formed in the pressing connecting piece, and the second through hole and the first through hole are coaxially arranged; and
the elastic sealing element is filled in the first through hole, two ends of the elastic sealing element are respectively abutted against the pressing connecting piece and the supporting protrusion, a third through hole is formed in the elastic sealing element and is coaxially arranged with the second through hole, a sealing layer capable of being broken through by poking is arranged in the third through hole, and the sealing layer is used for plugging the third through hole.
The invention also provides explosion-proof equipment which comprises the cable leading-in device.
The embodiment of the invention has the following beneficial effects:
according to the cable leading-in device, the elastic sealing element and the pressing connecting element are arranged in the support body, the pressing connecting element is in threaded connection with the support body, the breakable sealing layer is arranged in the third through hole of the elastic sealing element, and before explosion-proof equipment is connected with a cable through the cable leading-in device, the sealing layer is in a complete state, so that the complete isolation between the interior of the explosion-proof equipment and the outside can be realized; when needs connect the cable, can follow the second through-hole and insert the cable, make the cable poke through the sealing layer in the third through-hole and make the cable pass inside first through-hole gets into explosion-proof equipment, then screw up and compress tightly the connecting piece, make and compress tightly connecting piece extrusion elastic sealing element, elastic sealing element takes place to push down the cable after deformation, thereby realize the fixed of cable, realize explosion-proof equipment's sealed simultaneously, need not to reuse the fixed cable of glue, guarantee that explosion-proof equipment has better leakproofness and explosion-proof performance, and the later stage can conveniently be dismantled and maintained.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 the drawings without creative efforts.
Wherein:
FIG. 1 is a schematic view of the overall structure of the explosion-proof apparatus of the present invention;
FIG. 2 is a cross-sectional view of the explosion-proof apparatus of the present invention (when untethered);
FIG. 3 is a cross-sectional view of the cable entry device of the present invention;
FIG. 4 is a cross-sectional view of the elastomeric seal of the present invention;
description of reference numerals:
1. an explosion-proof device;
10. a cable lead-in device; 110. a support body; 111. a first through hole; 120. compressing the connecting piece; 121. a second through hole; 130. an elastomeric seal; 131. a third through hole; 132. a guide slope; 133. a first end; 134. a second end; 140. a support boss; 150. a sealing layer; 160. an annular gasket;
20. a housing; 210. an upper shell; 220. a lower case; 230. an inner cavity;
30. an electronic component;
40. a cable.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1 and 2, the present invention provides an explosion-proof device 1, which includes a housing 20, an electronic component 30, a cable 40, and a cable lead-in device 10, wherein the housing 20 has an inner cavity 230, the electronic component 30 is disposed in the inner cavity 230, the cable lead-in device 10 is disposed on the housing 20, and the cable 40 can enter the inner cavity 230 of the housing 20 from the cable lead-in device 10 and is connected to the electronic component 30.
Specifically, as shown in fig. 3, the cable lead-in device 10 includes a support body 110, a compression connector 120, and an elastic seal 130. The supporting body 110 is fixed on the housing 20, the supporting body 110 is provided with a first through hole 111, and the first through hole 111 is communicated with the inner cavity 230 of the housing 20.
It should be noted that, the supporting body 110 is hermetically connected with the housing 20, in this embodiment, the supporting body 110 is integrally disposed with the housing 20, and the supporting body 110 and the housing 20 may be integrally formed through an injection molding process. Of course, in other embodiments, the supporting body 110 and the housing 20 may be separated from each other, and the two may be hermetically connected by a sealing member or glue.
The support body 110 is further provided with a support protrusion 140, the support protrusion 140 is formed by protruding the hole wall of the first through hole 111 toward the inside of the first through hole 111, but the arrangement of the support protrusion 140 does not affect the cable 40 passing through the first through hole 111. The supporting protrusion 140 is of an annular structure, and the supporting protrusion 140 is coaxially arranged with the first through hole 111, so that when the cable 40 is installed, the cable 40 can pass through the inner hole of the annular supporting protrusion 140 and enter the explosion-proof equipment 1.
The compressing connector 120 is disposed in the first through hole 111, the compressing connector 120 is in threaded connection with the support body 110, and the length of the compressing connector 120 extending into the support body 110 can be changed by rotating the compressing connector 120. The pressing connector 120 is provided with a second through hole 121 for the cable 40 to pass through, and the second through hole 121 and the first through hole 111 are coaxially arranged. The elastic sealing member 130 is filled in the first through hole 111, two ends of the elastic sealing member 130 are respectively abutted against the pressing connection member 120 and the support protrusion 140, a third through hole 131 for the cable 40 to pass through is formed in the elastic sealing member 130, and the third through hole 131 and the second through hole 121 are coaxially arranged. When the cable 40 needs to be connected into the explosion-proof device 1, the cable 40 can sequentially pass through the second through hole 121, the third through hole 131 and the first through hole 111 and enter the explosion-proof device 1.
As shown in fig. 3 and 4, in the present embodiment, a breakable seal layer 150 is provided in the third through hole 131, and the seal layer 150 is used to close the third through hole 131. Before the explosion-proof equipment 1 is connected with the cable 40 through the cable lead-in device 10, the sealing layer 150 is in an integral state, and complete isolation between the inside of the explosion-proof equipment 1 and the outside can be realized; when the cable 40 needs to be connected, the cable 40 can be inserted from the second through hole 121, so that the cable 40 can break the sealing layer 150 in the third through hole 131 and the cable 40 passes through the first through hole 111 to enter the explosion-proof equipment 1, after the cable 40 is connected with the electronic equipment, the pressing connecting piece 120 is screwed down, the pressing connecting piece 120 extrudes the elastic sealing piece 130, the cable 40 can be extruded after the elastic sealing piece 130 deforms, and therefore the cable 40 is fixed, meanwhile, the explosion-proof equipment 1 is sealed, the cable 40 does not need to be fixed by glue, the explosion-proof equipment 1 is guaranteed to have better sealing performance and explosion-proof performance, and the cable can be conveniently disassembled and maintained at the later stage.
The first through hole 111 includes a threaded hole and a unthreaded hole which are communicated with each other, the unthreaded hole is located between the threaded hole and the support protrusion 140, the threaded hole is in threaded fit with the compression connection member 120, and the inner wall of the unthreaded hole is attached to the elastic sealing member 130. The inner wall of the optical hole and the outer wall of the elastic sealing member 130 need to be smooth and flat to ensure that the elastic sealing member 130 is tightly attached to the inner wall of the optical hole to ensure the sealing performance of the cable lead-in device 10.
It should be noted that the inner diameters of the second through hole 121 and the third through hole 131 are slightly larger than the outer diameter of the cable 40, so that the cable 40 can pass through the second through hole 121 and the third through hole 131 when the cable 40 is installed. When the elastic sealing member 130 is deformed by pressing, the third through hole 131 is correspondingly contracted, so that the cable 40 is tightly attached to the hole wall of the third through hole 131, and not only can the sealing of the cable introducing device 10 be realized, but also the fixing of the cable 40 can be realized.
The elastic sealing member 130 is made of rubber that can elastically deform, and in the present embodiment, the elastic sealing member 130 is made of neoprene, which has high tensile strength, excellent aging resistance, heat resistance, and chemical resistance, and can be suitably used in an explosion-proof environment.
The sealing layer 150 may be disposed at any position within the third through-hole 131 as long as it can seal the third through-hole 131. However, when the cable 40 is inserted from the second through hole 121, the operator can only apply force to the cable 40 from outside the second through hole 121, and considering that some cables 40 are relatively soft, the cable 40 may not be able to puncture the sealing layer 150 when applying force, therefore, in the present embodiment, the sealing layer 150 is disposed at one end of the third through hole 131 close to the pressing connection member 120, the distance between the sealing layer 150 and the second through hole 121 is short, and when the operator inserts the cable 40 from inside the second through hole 121, the cable 40 can transmit force well in a short distance, and further, the sealing layer 150 is punctured smoothly.
Since the sealing layer 150 serves to block the third through hole 131, the outer circumference of the sealing layer 150 is closely attached to the inner wall of the third through hole 131 before the cable 40 is inserted or after the cable 40 is inserted. In the present embodiment, the sealing layer 150 is integrally formed with the elastic sealing member 130. The sealing layer 150 and the elastic sealing member 130 are made of the same material and are also made of neoprene. The sealing layer 150 can also be tightly fitted to the cable 40 when the cable 40 punctures the sealing layer 150.
It will be appreciated that the thickness of the sealing layer 150 is relatively thin to facilitate the breaking of the cable 40.
Further, the elastic sealing member 130 includes a first end 133 close to the supporting protrusion 140 and a second end 134 far from the supporting protrusion 140, and the outer wall of the elastic sealing member 130 includes a guiding inclined surface 132 disposed close to the first end 133, and the guiding inclined surface 132 is inclined in a direction away from the hole wall of the first through hole 111 from the second end 134 to the first end 133. The guide slope 132 facilitates installation of the elastic sealing member 130 into the first through-hole 111.
The inclined angle of the guiding inclined plane 132 is 3 degrees to 10 degrees, when the inclined angle is in the range, the elastic sealing element 130 can be conveniently installed in the first through hole 111, when the elastic sealing element 130 is assembled in the first through hole 111, the gap between the guiding inclined plane 132 and the hole wall of the first through hole 111 is small, and when the elastic sealing element 130 is extruded and deformed, the guiding inclined plane 132 can be easily attached to the hole wall of the first through hole 111 to further realize the sealing of the first through hole 111.
In the present embodiment, the elastic sealing member 130 is substantially cylindrical, an outer diameter of a portion of the elastic sealing member 130 near the second end 134 is equal to an inner diameter of the first through hole 111, and an outer diameter of a portion of the elastic sealing member 130 near the first end 133 is gradually reduced along a direction from the second section to the first end 133.
Further, the cable lead-in device 10 further includes an annular gasket 160, and the annular gasket 160 is disposed between the elastic sealing member 130 and the compression connector 120. The annular gasket 160 can increase the force bearing area of the elastic sealing element 130 and prevent the compression connector 120 from damaging the elastic sealing element 130.
The housing 20 of the explosion-proof device 1 includes an upper housing 210 and a lower housing 220, the upper housing 210 and the lower housing 220 are detachably connected, the upper housing 210 and the lower housing 220 enclose an inner cavity 230, and the support body 110 and the lower housing 220 are integrally formed. When the cable 40 is installed, the housing 20 is opened to separate the upper case 210 and the lower case 220, the cable 40 is inserted into the lower case 220 from the cable lead-in device 10 and connected to the electronic component 30, after the connection is completed, the upper case 210 and the lower case 220 are hermetically connected, and the compression connector 120 is tightened to hermetically fix the cable 40 in the cable lead-in device 10.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (10)
1. A cable entry device, comprising:
the supporting body is provided with a first through hole, and a supporting bulge is arranged on the hole wall of the first through hole;
the pressing connecting piece is arranged in the first through hole and is in threaded connection with the support body, a second through hole is formed in the pressing connecting piece, and the second through hole and the first through hole are coaxially arranged; and
the elastic sealing element is filled in the first through hole, two ends of the elastic sealing element are respectively abutted against the pressing connecting piece and the supporting protrusion, a third through hole is formed in the elastic sealing element and is coaxially arranged with the second through hole, a sealing layer capable of being broken through by poking is arranged in the third through hole, and the sealing layer is used for plugging the third through hole.
2. The cable entry device of claim 1, wherein the support protrusion is an annular structure and is disposed coaxially with the first through hole.
3. The cable entry device of claim 1, further comprising an annular gasket disposed between the resilient seal and the compression connector.
4. The cable entry device of claim 1, wherein the sealing layer is disposed within the third aperture proximate an end of the compression connector.
5. The cable entry device of claim 1 wherein the resilient seal is integrally formed with the sealing layer.
6. The cable entry device of claim 1, wherein the resilient seal includes a first end proximate the support protrusion and a second end distal from the support protrusion, the outer wall of the resilient seal including a guide ramp disposed proximate the first end, the guide ramp being inclined in a direction from the second end to the first end in a direction away from the wall of the first through hole.
7. The cable entry device of claim 1 wherein said first through hole includes a threaded hole and an unthreaded hole in communication, said unthreaded hole being located between said threaded hole and said support boss, said threaded hole being in threaded engagement with said compression connector, an inner wall of said unthreaded hole engaging said elastomeric seal.
8. The cable entry device of claim 1 wherein said elastomeric seal is neoprene.
9. An explosion-proof device, characterized in that it comprises a cable lead-in arrangement according to any one of claims 1 to 8.
10. The explosion proof device of claim 9, wherein said explosion proof device comprises a housing, an electronic component and a cable, said housing having an inner cavity, said electronic component being disposed in said inner cavity, said support body being integrally disposed with said housing, and said first through hole being in communication with said inner cavity, one end of said cable passing through said second through hole, said third through hole, said first through hole and said sealing layer and being connected to said electronic component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910636477.1A CN110661227A (en) | 2019-07-15 | 2019-07-15 | Cable lead-in device and explosion-proof equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910636477.1A CN110661227A (en) | 2019-07-15 | 2019-07-15 | Cable lead-in device and explosion-proof equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110661227A true CN110661227A (en) | 2020-01-07 |
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ID=69030956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910636477.1A Pending CN110661227A (en) | 2019-07-15 | 2019-07-15 | Cable lead-in device and explosion-proof equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110661227A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112490980A (en) * | 2020-11-18 | 2021-03-12 | 北京光华世通科技有限公司 | Cable sealing element |
| CN112781168A (en) * | 2021-01-29 | 2021-05-11 | 广州安菲环保科技有限公司 | Quick-mounting type explosion-proof distribution box and industrial explosion-proof air curtain machine |
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| CN201623450U (en) * | 2009-11-26 | 2010-11-03 | 平高集团有限公司 | Lead wire protecting sleeve of electrical product |
| CN202418930U (en) * | 2011-10-28 | 2012-09-05 | 新黎明防爆电器有限公司 | Clamping and sealing joint |
| CN202597916U (en) * | 2012-05-25 | 2012-12-12 | 上海麦玺隆机械科技有限公司 | Structural member of cable penetration pressure vessel |
| CN105757626A (en) * | 2014-12-18 | 2016-07-13 | 海洋王照明科技股份有限公司 | Anti-explosion lighting system and anti-explosion illumination sensor |
| CN207082818U (en) * | 2017-07-07 | 2018-03-09 | 泰州市得尔机电制造有限公司 | A kind of anti-explosion cable introducing device |
| CN208401470U (en) * | 2018-05-23 | 2019-01-18 | 北京宏博亚泰电气设备有限公司 | A kind of cable outlet pore structure |
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2019
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201623450U (en) * | 2009-11-26 | 2010-11-03 | 平高集团有限公司 | Lead wire protecting sleeve of electrical product |
| CN202418930U (en) * | 2011-10-28 | 2012-09-05 | 新黎明防爆电器有限公司 | Clamping and sealing joint |
| CN202597916U (en) * | 2012-05-25 | 2012-12-12 | 上海麦玺隆机械科技有限公司 | Structural member of cable penetration pressure vessel |
| CN105757626A (en) * | 2014-12-18 | 2016-07-13 | 海洋王照明科技股份有限公司 | Anti-explosion lighting system and anti-explosion illumination sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112490980A (en) * | 2020-11-18 | 2021-03-12 | 北京光华世通科技有限公司 | Cable sealing element |
| CN112781168A (en) * | 2021-01-29 | 2021-05-11 | 广州安菲环保科技有限公司 | Quick-mounting type explosion-proof distribution box and industrial explosion-proof air curtain machine |
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Application publication date: 20200107 |