CN106786258B - A kind of anti-explosion terminal box - Google Patents
A kind of anti-explosion terminal box Download PDFInfo
- Publication number
- CN106786258B CN106786258B CN201710095844.2A CN201710095844A CN106786258B CN 106786258 B CN106786258 B CN 106786258B CN 201710095844 A CN201710095844 A CN 201710095844A CN 106786258 B CN106786258 B CN 106786258B
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- CN
- China
- Prior art keywords
- external screw
- outside
- nut
- compression cylinder
- terminal box
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Classifications
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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
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/08—Distribution boxes; Connection or junction boxes
- H02G3/088—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings or inlets
-
- 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
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/08—Distribution boxes; Connection or junction boxes
- H02G3/081—Bases, casings or covers
- H02G3/083—Inlets
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Cable Accessories (AREA)
Abstract
A kind of anti-explosion terminal box, including box body, box body is provided with several inlet wire pipes, inlet wire pipe includes inner nut and external screw rod, inner nut is fixedly connected on box body, box body is stretched out in one end of inner nut, the medial surface of inner nut is in axial direction followed successively by the first inner headed face, step surface, internal thread segment from inside to outside, refer to from inside to outside from the direction of the Inside To Outside of box body, the internal diameter of step surface is more than the internal diameter of the first inner headed face, internal thread segment is provided with internal thread, and internal thread segment is the bell mouth shape gradually expanded from inside to outside；The inner nut and external screw rod that the present invention mutually screws, by compressing the elastic compression cylinder in external screw rod, cable therein is compressed, is then locked with locking nut by inner nut and external screw rod are further fixed, vibrations in use or the outside elastic force of elastic compression cylinder is prevented and disengages.
Description
Technical field
The present invention relates to antiknock device field, more particularly, to a kind of terminal box.
Background technology
Underground coal mine environment there are dust and inflammable gas, and any situation is run into when it reaches explosion limit and is produced
Electric spark, all easily cause to explode, produce serious work safety accident, thus communication equipment under mine, monitoring instrument,
Instrument and automation equipment etc. must have explosion prevention function, otherwise cannot be used for underground installation and cable wiring manufacture.
Mine lighting facility and power-equipment are more, in circuit cable distribution process, it is necessary to be used as wiring using terminal box
Midway switching.In common underground terminal box at present, it is poorly sealed point of incoming cables to be present, easily there is the problem of steam entrance.
Also sparking is easily produced in terminal box, if sealing and it is explosion-proof do inadequate, just most likely result in explosion accident.
The content of the invention
It is an object of the invention to provide a kind of anti-explosion terminal box, the sealing effectiveness of point of incoming cables is improved.
The technical scheme is that：
A kind of anti-explosion terminal box, including box body, box body are provided with several inlet wire pipes, and inlet wire pipe includes inner nut and outer spiral shell
Bar, inner nut are fixedly connected on box body, and box body is stretched out in one end of inner nut, the medial surface of inner nut in axial direction from it is interior to
The first inner headed face, step surface, internal thread segment are followed successively by outside, is referred to from inside to outside from the direction of the Inside To Outside of box body, step surface
Internal diameter be more than the internal diameter of the first inner headed face, internal thread segment is provided with internal thread, and internal thread segment gradually expands from inside to outside
Bell mouth shape；External thread section, neck and screw head are sequentially provided with the lateral surface of external screw rod from inside to outside；External thread section is provided with
External screw thread, to be threadedly coupled between the external screw thread of external thread section and the internal thread in internal thread segment, inner one end of external thread section
It is axially disposed circumferentially arranged with more than two strip v notch vs, strip v notch v；The inner side of external screw rod is hollow, inner side connection
The elastic compression cylinder of flexible material, the shape of cross section of elastic compression cylinder are annular, edge on the medial surface of elastic compression cylinder
Direction from inside to outside is sequentially provided with the annular projection of several annulars, the internal diameter of outer one end of medial surface of elastic compression cylinder
More than the internal diameter of inner one end, the internal diameter of the annular projection in elastic compression cylinder in the inner part is less than or equal to the external diameter of cable.
Also include locking nut, locking nut is set on external screw rod, and the outer one end of locking nut is provided with snap ring, snap ring card
In the neck of external screw rod, inner one end of locking nut is provided with internal thread, corresponding to be set in the outer one end in the outside of inner nut
There is external screw thread, be threadedly coupled between the internal thread of locking nut and the external screw thread of inner nut.
The internal diameter of the medial surface of elastic compression cylinder becomes larger from inside to outside.
The medial surface of the external screw rod is provided with several clamping slots, the lateral surface of the elastic compression cylinder circumferentially arranged with
Several clamping bars；Clamping slot is adapted with the position of clamping bar and shape.
The cross sectional shape of clamping slot and clamping bar is rectangle.
The internal diameter of the annular projection of inner one end is less than the internal diameter of the first inner headed face.
Encapsulation has epoxy resin in the step surface of inner nut.
The axial width of snap ring is less than the axial width of neck.
Tilt angle alpha≤5 ° of inner one end on the medial surface of elastic compression cylinder.
The quantity of annular projection is more than 6.
The inner nut and external screw rod that the present invention mutually screws, by compressing the elastic compression cylinder in external screw rod, compress wherein
Cable, then locked with locking nut by inner nut and external screw rod are further fixed, prevent vibrations in use or elasticity
The outside elastic force of clamping cylinder and disengage.It is multiple-sealed that the present invention makes cable be realized in box body import, effectively prevents entering for steam
Enter, prevent that the electric spark in box body from igniting the flammable explosive gas on the outside of box body, realizes explosion-proof and sealing.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is Fig. 1 A-A sectional views；
Fig. 3 is Fig. 1 A-A sectional views（Locking nut is not shown）；
Fig. 4 is the structural representation of external screw rod；
Fig. 5 is Fig. 4 left view.
Embodiment
As Figure 1-5, a kind of anti-explosion terminal box includes box body 1, and box body 1 is provided with several inlet wire pipes 2, inlet wire pipe 2
Including inner nut 3 and external screw rod 4, locking nut 14, inner nut 3 is fixedly connected on box body 1, and box is stretched out in one end of inner nut 3
Body 1, the medial surface of inner nut 3 are in axial direction followed successively by the first inner headed face 5, step surface 6, internal thread segment 7 from inside to outside, from interior
Refer to outer from the direction of the Inside To Outside of box body 1, the internal diameter of step surface 6 is more than the internal diameter of the first inner headed face 5, internal thread segment 7
Internal thread is provided with, internal thread segment 7 is the bell mouth shape gradually expanded from inside to outside, such as truncated cone-shaped mouth；The lateral surface of external screw rod 4
On be sequentially provided with external thread section 8, neck 9 and screw head 10 from inside to outside；External thread section 8 is provided with external screw thread, external thread section 8
It is to be threadedly coupled between external screw thread and the internal thread in internal thread segment 7.As shown in Figure 4,5, inner one end of external thread section 8 is along week
To provided with more than two strip v notch vs 11（The present embodiment is two）, single strip v notch v 11 is axially disposed.When outer
When the stress of thread segment 8 is extruded, strip v notch v 11 can deform, and narrow to contract, can inwardly extrude.
The inner side of external screw rod 4 is hollow, and inner side is connected with the elastic compression cylinder 12 of elastic material, and elastic material can use rubber
Glue, the shape of cross section of elastic compression cylinder 12 are annular, on the medial surface of elastic compression cylinder 12 along direction from inside to outside according to
The secondary annular projection 13 provided with several annulars, the quantity of annular projection 13 are more than 6, and the spacing of annular projection 13 is according to electricity
The internal diameter of cable diameter and elastic compression cylinder 12 is set, and the internal diameter of outer one end of medial surface of elastic compression cylinder 12 is more than inner
The internal diameter of one end, is so easy to the insertion of cable, and the internal diameter of the medial surface of elastic compression cylinder 12 gradually expands from inside to outside.But lean on
The difference of the internal diameter of outer one end and the internal diameter of inner one end should not be excessive.In Fig. 2, the tilt angle alpha of inner one end on medial surface
≤5°。
The internal diameter of the annular projection 13 of inner one end is less than or equal to the internal diameter of the first inner headed face 5.The present embodiment is inner one
The internal diameter of the annular projection 13 at end is less than the internal diameter of the first inner headed face 5, and the cable that can so ensure insertion is in being extruded into
In nut 3.Cable extrusion annular projection 13 enters, and carries out first time crush seal.
When external thread section 8 is extruded by the pressure of circumferencial direction, strip v notch v 11 can be extruded generation deformation, long
The breach spacing of bar v notch v 11 diminishes, so that the diameter of external thread section 8 diminishes, the elasticity pressure being pointed in external thread section 8
Tight cylinder 12 carries out inside extruding, is allowed to compress.Carry out second of crush seal.Sealing effectiveness can be improved by so doing, and then
Increase the explosion-proof effect of terminal box.
Locking nut 14 is set on external screw rod 4, and 14 outer one end of locking nut is provided with snap ring 15, and snap ring 15 is stuck in outer spiral shell
In the neck 9 of bar 4, inner one end of locking nut 14 is provided with internal thread 16, the corresponding lateral surface in outer one end of inner nut 3
Provided with external screw thread 17, it is threadedly coupled between the internal thread 16 of locking nut 14 and the external screw thread 17 of inner nut 3.The axial direction of snap ring 15
Width is less than the axial width of neck 9, and snap ring 15 has the stroke tightened, so energy screw-threaded coupling, prevents when in use by outer
Power disengages, or loses sealing effectiveness because the aging of elastic compression cylinder 12 deforms.
The medial surface of external screw rod 4 is provided with several clamping slots 18, if the lateral surface of elastic compression cylinder 12 circumferentially arranged with
Dry clamping bar 19；Clamping slot 18 is adapted with the position of clamping bar 19 and shape.During installation, clamping bar 19 is first snapped onto into card
In tight groove 18.The cross sectional shape of clamping slot 18 and clamping bar 19 is rectangle.
After installing, encapsulation epoxy resin in the step surface 6 of inner nut 3, between cable and inner nut 3 further
Sealing.
Use process：Insert the cable into elastic compression cylinder 12, be squeezed cable and press against by annular projection 13, then wear
Inner nut 3 is crossed to enter in box body 1.
Then external screw rod 4 is screwed, screw thread screws between making the internal thread on the external screw thread and internal thread segment 7 of external thread section 8,
Strip v notch v 11, which shrinks, to narrow, and the deformation of the leading portion of elastic compression cylinder 12 is further compressed cable.Then locking nut 14 is screwed
.Due to the crimp of elastic compression cylinder 12, make cable enter at box body carried out by multiple annular projections 13 it is multiple close
Envelope, effectively prevents steam from entering, avoids the ionized gas of electric spark from passing through the flammable explosive gas that ignited at this.
Claims (10)
1. a kind of anti-explosion terminal box, including box body, box body is provided with several inlet wire pipes, it is characterised in that：Inlet wire pipe includes interior
Nut and external screw rod, inner nut are fixedly connected on box body, and box body is stretched out in one end of inner nut, and the medial surface of inner nut is vertically
Direction is followed successively by the first inner headed face, step surface, internal thread segment from inside to outside, refers to from inside to outside from the side of the Inside To Outside of box body
Be more than the internal diameter of the first inner headed face to the internal diameter of, step surface, internal thread segment is provided with internal thread, internal thread segment be from inside to outside by
The big bell mouth shape of flaring；External thread section, neck and screw head are sequentially provided with the lateral surface of external screw rod from inside to outside；External screw thread
Section is provided with external screw thread, to be threadedly coupled between the external screw thread of external thread section and the internal thread in internal thread segment, external thread section
Inner one end is axially disposed circumferentially arranged with more than two strip v notch vs, strip v notch v；The inner side of external screw rod is hollow,
Inner side is connected with the elastic compression cylinder of elastic material, and the shape of cross section of elastic compression cylinder is annular, elastic compression cylinder it is interior
The annular projection of several annulars, the medial surface outer one of elastic compression cylinder are sequentially provided with side along direction from inside to outside
The internal diameter at end is more than the internal diameter of inner one end；Annular projection in elastic compression cylinder in the inner part, internal diameter of annular projection is small at this
In the external diameter equal to cable.
2. anti-explosion terminal box according to claim 1, it is characterised in that：Also include locking nut, locking nut is set in
On external screw rod, the outer one end of locking nut is provided with snap ring, and snap ring is stuck in the neck of external screw rod, and inner one end of locking nut is set
Have an internal thread, it is corresponding to be provided with external screw thread in the outer one end in the outside of inner nut, the internal thread of locking nut and inner nut outside
It is threadedly coupled between screw thread.
3. anti-explosion terminal box according to claim 1 or 2, it is characterised in that：The internal diameter of the medial surface of elastic compression cylinder from
It is interior to becoming larger outside.
4. anti-explosion terminal box according to claim 1 or 2, it is characterised in that：If the medial surface of the external screw rod is provided with
Dry clamping slot, the lateral surface of the elastic compression cylinder is circumferentially arranged with several clamping bars；The position of clamping slot and clamping bar
And shape is adapted.
5. anti-explosion terminal box according to claim 4, it is characterised in that：The cross sectional shape of clamping slot and clamping bar is square
Shape.
6. anti-explosion terminal box according to claim 1 or 2, it is characterised in that：The internal diameter of the annular projection of inner one end is small
In the internal diameter of the first inner headed face.
7. anti-explosion terminal box according to claim 1 or 2, it is characterised in that：Encapsulation has epoxy in the step surface of inner nut
Resin.
8. anti-explosion terminal box according to claim 1 or 2, it is characterised in that：The axial width of snap ring is less than the axle of neck
To width.
9. anti-explosion terminal box according to claim 1 or 2, it is characterised in that：Inner one on the medial surface of elastic compression cylinder
Tilt angle alpha≤5 ° at end.
10. anti-explosion terminal box according to claim 1 or 2, it is characterised in that：The quantity of annular projection is more than 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710095844.2A CN106786258B (en) | 2017-02-22 | 2017-02-22 | A kind of anti-explosion terminal box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710095844.2A CN106786258B (en) | 2017-02-22 | 2017-02-22 | A kind of anti-explosion terminal box |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106786258A CN106786258A (en) | 2017-05-31 |
| CN106786258B true CN106786258B (en) | 2018-03-02 |
Family
ID=58958818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710095844.2A Active CN106786258B (en) | 2017-02-22 | 2017-02-22 | A kind of anti-explosion terminal box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106786258B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109889581B (en) * | 2019-01-29 | 2020-06-02 | 北京讯腾智慧科技股份有限公司 | Intelligent gas monitoring system based on Beidou short message |
| CN110518521A (en) * | 2019-08-30 | 2019-11-29 | 国网山东省电力公司商河县供电公司 | A kind of cable block head |
| CN111564815A (en) * | 2020-05-15 | 2020-08-21 | 沈阳飞机工业（集团）有限公司 | Cable end fixing device and using method thereof |
| CN112701633B (en) * | 2021-01-22 | 2022-04-15 | 陕西立博源科技有限公司 | 5G communication cable installation regulator and regulating method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8137136B1 (en) * | 2011-05-31 | 2012-03-20 | Precision Engine Controls Corporation | Electrical disconnect for hazardous areas |
| CN202602202U (en) * | 2012-06-13 | 2012-12-12 | 朱素央 | Screw type explosion-proof junction box |
| CN205231640U (en) * | 2015-12-04 | 2016-05-11 | 南阳中天防爆电气有限公司 | Metal casing cable entry |
-
2017
- 2017-02-22 CN CN201710095844.2A patent/CN106786258B/en active Active
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| Publication number | Publication date |
|---|---|
| CN106786258A (en) | 2017-05-31 |
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| CP01 | Change in the name or title of a patent holder |
Address after: 1 No. 473000 Industrial Zone, hi tech Zone, Henan, Nanyang Patentee after: Nanyang Zhongtian explosion proof Electric Co.,Ltd. Address before: 1 No. 473000 Industrial Zone, hi tech Zone, Henan, Nanyang Patentee before: NANYANG ZHONGTIAN EXPLOSION-PROOF ELECTRIC Co.,Ltd. |