CN203931600U - A kind of colliery local earth lead fastening bolt external member - Google Patents
A kind of colliery local earth lead fastening bolt external member Download PDFInfo
- Publication number
- CN203931600U CN203931600U CN201420252743.3U CN201420252743U CN203931600U CN 203931600 U CN203931600 U CN 203931600U CN 201420252743 U CN201420252743 U CN 201420252743U CN 203931600 U CN203931600 U CN 203931600U
- Authority
- CN
- China
- Prior art keywords
- double
- screw bolt
- nut
- pad
- earth lead
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model belongs to underground mine use auxiliary equipment technical field, is specifically related to a kind of colliery local earth lead fastening bolt external member.The utility model mainly solves bare copper wire under coal mine and easily loses, and high, the unbending problem of galvanized iron wire material consistency and elasticity.The technical solution of the utility model is: a kind of colliery local earth lead fastening bolt external member, comprise double-screw bolt, nut, pad and spring pad, wherein: the top of double-screw bolt is provided with cannelure and double-screw bolt outer surface of upper is external thread structure, nut is movably connected in the top of double-screw bolt, spring pad is enclosed within double-screw bolt top and is positioned at the below of nut, pad is enclosed within double-screw bolt top and is positioned at the below of spring pad, and the bottom of double-screw bolt is external screw thread or female thread structure.The utlity model has advantage simple in structure, easy for installation.
Description
Technical field
The utility model belongs to underground mine use auxiliary equipment technical field, is specifically related to a kind of colliery local earth lead fastening bolt external member.
Background technology
" safety regulations in coal mine " specifies the instructions for use of downhole ground line: under coal mine, the earth connection of local earthed electrode must use sectional area to be not less than 25mm
2bare copper wire or sectional area be not less than 50mm
2galvanized iron wire.But bare copper wire cost is higher, be easy to lose.So apart from outside people's post electric substation, other place adopts lower-cost galvanized iron wire conventionally under coal mine.But, also there is in actual use a shortcoming as lower-cost galvanized iron wire: material consistency and elasticity is high especially, be not easy bending, often cause occurring fracture, opening, the various forms of damages such as loosening with its supporting copper line nose being connected, once copper line nose damages still more, cannot repair at all.So not only increased the input cost of protective earthing, and reliability and the fail safe of should possess to earthing device leave hidden danger.For this reason, master workers once racked one's brains attempt confined pressure, press, the multiple connection technique such as welding changes this present situation, but copper line nose material is softer after all, so in actual use, the ratio of damage is still very high.
Summary of the invention
The utility model is easily lost mainly for bare copper wire under coal mine, and high, the unbending problem of galvanized iron wire material consistency and elasticity provides a kind of colliery local earth lead fastening bolt external member.
The utility model is to address the above problem the technical scheme of taking to be:
A kind of colliery local earth lead fastening bolt external member, comprise double-screw bolt, nut, pad and spring pad, wherein: the top of double-screw bolt is provided with cannelure and double-screw bolt outer surface of upper is external thread structure, nut is movably connected in the top of double-screw bolt, spring pad is enclosed within double-screw bolt top and is positioned at the below of nut, pad is enclosed within double-screw bolt top and is positioned at the below of spring pad, and the bottom of double-screw bolt is external screw thread or female thread structure.
Further, double-screw bolt described in the utility model is galvanized iron double-screw bolt.
Compared with prior art, the utlity model has following beneficial effect: 1, connect technique simple, easy and simple to handle, all personnel that installed and used this securing member, generally reflect that it is installed, dismounting is extremely convenient, only need general utility wrench firmly to connect; 2, bonding strength is high, can reuse, and so long as not artificial unloading, loosening, damage phenomenon that whenever this securing member all there will not be; 3, contact resistance is little and stable, has improved the reliability of mine protective earthing; 4, reduce the input cost of mine protective earthing; 5, not high to maintenance personal's technical requirement, general workman can install; 6, through ore deposit test group to using the earthing device after this external member connects to carry out grounding resistance measurement, its measurement result meets the requirements completely.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model embodiment 1;
Fig. 2 is the structural representation of the utility model embodiment 2;
Fig. 3 is the structural representation of the utility model embodiment 1 double-screw bolt;
Fig. 4 is the structural representation of the utility model pad;
Fig. 5 is that the utility model embodiment 1 uses state diagram;
Fig. 6 is that the utility model embodiment 2 uses state diagram.
Embodiment
Embodiment 1,
As shown in Figure 1, Figure 3 and Figure 4, a kind of colliery local earth lead fastening bolt external member, comprise galvanized iron double-screw bolt 1, nut 2, two pads 3 and spring pads 4, the top of double-screw bolt 1 is provided with cannelure 5 and double-screw bolt 1 outer surface of upper is external thread structure, nut 2 is movably connected in the top of double-screw bolt 1, spring pad 4 is enclosed within double-screw bolt 1 top and is positioned at the below of nut 2, and two pads 3 are enclosed within double-screw bolt 1 top and are positioned at the below of spring pad 4, and the bottom of double-screw bolt 1 is external thread structure.
Concrete making step is:
1, first select the galvanized iron double-screw bolt of suitable diameter according to the sectional area of earth lead, for ensureing bonding strength, adopting galvanized iron double-screw bolt is φ 20mm, if connect galvanized iron double-screw bolt cross section minimum ≮ 24mm as earth bus.
2, then centered by double-screw bolt diameter, offer cannelure, cannelure width: with galvanized iron earth lead equal diameters; The cannelure degree of depth: > spacer thickness × 2+ spring pad thickness+nut thickness.
3, external thread structure is all made in the upper and lower of double-screw bolt.
Installation steps:
1, as shown in Figure 5, the bottom of the utility model double-screw bolt is connected with the bolt hole of the equipment ground utmost point;
2, be then pressed into successively a pad, ground connection galvanized iron wire, another pad, spring pad and nut, wherein ground connection galvanized iron wire is pressed in cannelure.
Embodiment 2
As shown in Figure 2 and Figure 4, a kind of colliery local earth lead fastening bolt external member, comprise galvanized iron double-screw bolt 1, nut 2, two pads 3 and spring pads 4, the top of double-screw bolt 1 is provided with cannelure 5 and double-screw bolt 1 outer surface of upper is external thread structure, nut 2 is movably connected in the top of double-screw bolt 1, spring pad 4 is enclosed within double-screw bolt 1 top and is positioned at the below of nut 2, and two pads 3 are enclosed within double-screw bolt 1 top and are positioned at the below of spring pad 4, and the bottom of double-screw bolt 1 is female thread structure.
Concrete making step is:
1, first select the galvanized iron double-screw bolt of suitable diameter according to the sectional area of earth lead, for ensureing bonding strength, adopting galvanized iron double-screw bolt is φ 20mm, if connect galvanized iron double-screw bolt cross section minimum ≮ 24mm as earth bus.
2, then centered by double-screw bolt diameter, offer cannelure, cannelure width: with galvanized iron earth lead equal diameters; The cannelure degree of depth: > spacer thickness × 2+ spring pad thickness+nut thickness.
3, external thread structure is made in the top of double-screw bolt, female thread structure is all made in bottom.
Installation steps:
1, as shown in Figure 6, the earth terminal of electromechanical equipment is connected with the internal thread of the utility model double-screw bolt bottom,
2, be then pressed into successively a pad, ground connection galvanized iron wire, another pad, spring pad and nut, wherein ground connection galvanized iron wire is pressed in cannelure.
Claims (2)
1. a colliery local earth lead fastening bolt external member, comprise double-screw bolt (1), nut (2), pad (3) and spring pad (4), it is characterized in that: the top of double-screw bolt (1) is provided with cannelure (5) and double-screw bolt (1) outer surface of upper is external thread structure, nut (2) is movably connected in the top of double-screw bolt (1), spring pad (4) is enclosed within double-screw bolt (1) top and is positioned at the below of nut (2), pad (3) is enclosed within double-screw bolt (1) top and is positioned at the below of spring pad (4), the bottom of double-screw bolt (1) is external screw thread or female thread structure.
2. a kind of colliery according to claim 1 local earth lead fastening bolt external member, is characterized in that: described double-screw bolt (1) is galvanized iron double-screw bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420252743.3U CN203931600U (en) | 2014-05-16 | 2014-05-16 | A kind of colliery local earth lead fastening bolt external member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420252743.3U CN203931600U (en) | 2014-05-16 | 2014-05-16 | A kind of colliery local earth lead fastening bolt external member |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203931600U true CN203931600U (en) | 2014-11-05 |
Family
ID=51827373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420252743.3U Expired - Fee Related CN203931600U (en) | 2014-05-16 | 2014-05-16 | A kind of colliery local earth lead fastening bolt external member |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203931600U (en) |
-
2014
- 2014-05-16 CN CN201420252743.3U patent/CN203931600U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 Termination date: 20150516 |
|
| EXPY | Termination of patent right or utility model |