CN210884975U - Special lightning protection grounding system of cable crane - Google Patents
Special lightning protection grounding system of cable crane Download PDFInfo
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- CN210884975U CN210884975U CN201921471606.8U CN201921471606U CN210884975U CN 210884975 U CN210884975 U CN 210884975U CN 201921471606 U CN201921471606 U CN 201921471606U CN 210884975 U CN210884975 U CN 210884975U
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Abstract
A lightning protection grounding system special for a cable crane comprises a lightning arrester wire, anchoring points, lightning arrester round steel, a horizontal grid of a lightning arrester wire, a vertical grounding electrode, wherein the lightning arrester wire is locked by a rope clamp through the anchoring points, a rope head of the lightning arrester wire is in compression joint with the lightning arrester round steel through a parallel wire clamp, the horizontal grid of the lightning arrester wire and the vertical grounding electrode are connected through welding to form a grounding grid, the lightning arrester round steel is in welding connection with the grounding grid, and a guiding grid is arranged below the anchoring points and at least 3 meters away from each other. The utility model has the advantages that, lightning grounding system device has advantages such as wide, the stable in structure of coverage, fail safe nature height.
Description
Technical Field
The utility model relates to a special lightning protection ground system of cable crane, this system are applicable to the cable crane of high mountain canyon area installation, can effectively avoid the thunderbolt to cause equipment to damage.
Background
The elevation of the top of the Wudongde hydropower station dam is ▽ 988m, the dam is in a high mountain canyon zone, a construction site is not beneficial to arrangement of large-scale construction equipment, and for efficiently completing a dam concrete construction task, according to design requirements, three cable cranes are installed on ▽ 1060 platforms on the left and right banks of the dam by a construction unit.
The lightning protection method of the traditional equipment generally adopts a structure and an electrical grounding measure, the lightning protection problem of an equipment electrical control system can not be completely solved by the method, equipment of the equipment electrical control system can still be tripped or damaged by lightning stroke, and in order to effectively solve the lightning protection problem of a cable crane, a construction unit manufactures a set of special lightning protection grounding system for the cable crane, the system not only can effectively prevent the cable crane from being struck by lightning, but also can solve the lightning protection problem of all buildings and equipment in a dam area below the cable crane; the downlead and the grounding device of the system adopt a mesh design, and the problem that the grounding resistance does not reach the standard in arid rainless areas can be effectively solved.
Disclosure of Invention
The utility model aims to solve the technical problem that, overcome cable crane and directly hit the thunder in the operation and cause equipment to damage, through arranging the special lightning grounding system of cable crane of a safe and reliable, can effectively avoid cable crane to receive the thunderbolt to damage.
In order to solve the problem, the utility model adopts the following technical scheme: a lightning protection grounding system special for a cable crane comprises lightning arrester wires of a lightning arrester, anchoring points, round steel of a down conductor, a horizontal grid of the down conductor flat iron and a vertical grounding electrode;
the lightning conductor of the lightning arrester is locked by a rope clamp through an anchoring point, the rope head of the lightning conductor of the lightning arrester is in compression joint with the round steel of the downlead by adopting a parallel wire clamp, the horizontal grid and the vertical grounding electrode of the downlead are connected by welding to form a grounding grid, and the round steel of the downlead is in welding connection with the grounding grid;
the guiding net is arranged below the anchoring point and at least 3 meters away.
Preferably, rope ends at two ends of the lightning conductor of the lightning arrester penetrate through the anchoring point heart ring, and are locked by rope clamps after the length of the lightning conductor is reserved and is overlapped with the down-lead round steel.
Preferably, the anchoring points are formed by processing 4 mortar anchor rods with diameter of 28mm and a ring with diameter of 30mmU, and the depth of the mortar anchor rods entering the rock is not less than 5.5 m.
Preferably, the rope head of the lightning conductor of the lightning arrester is in compression joint with the round steel of the down conductor by a steel wire rope double-hole splayed aluminum sleeve.
Preferably, the down lead round steel adopts a 25mm round steel2The galvanized steel strand is welded with the end part of the horizontal grid of the down conductor flat iron.
Preferably, the distance between the anchor rods of the vertical grounding electrode is 3 × 3m, and the rock-entering depth is not less than 2.8 m.
Preferably, a plurality of lightning protection side needles are arranged on the lightning arrester wire of the lightning arrester, and the lightning protection side needles are sleeved on the lightning arrester wire of the lightning arrester through a rubber insulation sleeve.
The utility model has the advantages that, a lightning arrester of four zinc-plated steel strand wires preparation that river surface equidistance was arranged is spaned in overhead cable crane, the earthing device that anchor and many stock are constituteed in the downlead of both sides bank slope is connected and is constituted. The lightning protection grounding system device has a stable structure, can continuously protect equipment after being installed, and is safe and reliable.
Drawings
The invention is further illustrated by the following figures and examples:
fig. 1 is a schematic structural diagram of a lightning protection grounding system special for a cable crane.
Fig. 2 is a schematic view of the connection between the down conductor round steel and the grounding grid.
Fig. 3 is a schematic structural view of the lightning arrester wire connecting the lightning arrester side rod.
Fig. 4 is a reference diagram for use of the present invention.
As shown in the figure, the lightning arrester lightning conductor 1, an anchoring point 2, a down conductor round steel 3, a down conductor flat iron horizontal grid 4, a vertical grounding electrode 5, a lightning protection side needle 6 and a rubber insulation sleeve 7.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
As shown in fig. 1, 2 and 3, a lightning protection grounding system special for a cable crane comprises a lightning arrester wire 1, an anchoring point 2, a down conductor round steel 3, a down conductor flat iron horizontal grid 4 and a vertical grounding electrode 5;
preferably, the guide net is arranged below the anchoring point 2 and at least 3 meters away from the anchoring point, rope ends at two ends of the lightning conductor 1 of the lightning arrester pass through the heart ring of the anchoring point 2, and the lightning conductor is locked by rope clips after the length of the lightning conductor is reserved and overlapped with the round steel 3 of the down conductor
The anchoring point 2 is formed by processing 4 mortar anchor rods with diameter of 28mm and a ring with diameter of 30mmU mm, and the depth of the mortar anchor rods entering the rock is not less than 5.5 m.
Preferably, the rope end of the lightning arrester wire 1 and the down lead round steel 3 are in compression joint by a steel wire rope double-hole 8-shaped aluminum sleeve.
Preferably, the distance between the anchor rods of the vertical grounding electrode 5 is 3 × 3m, and the rock-entering depth is not less than 2.8 m.
Preferably, as in fig. 3 be equipped with a plurality of lightning-arrest side needles 6 on arrester wires 1, lightning-arrest side needle 6 overlaps through rubber is completely originated 7 covers and is established on arrester wires 1, sets up lightning-arrest side needle 6 and can improve, arrester wires 1's coverage area to can make the interval between arrester wires 1 increase, thereby avoid setting up too closely because of arrester wires 1, cause adjacent arrester wires 1 to touch each other because of the strong wind.
The utility model discloses the installation as follows (use the construction of wudongde's hydropower station as an example), the structure after the installation is accomplished is shown in FIG. 4:
1) and installing the lightning arrester wire 1 of the lightning arrester: after the construction of the ground anchor points 2 paired at the two banks is completed, the lightning arrester wire 1 passes through the auxiliary traction of the cable crane trolley to cross the river, then the bank 5t winch is operated to utilize the guide rope to pull the ground anchor points 2U-shaped rings to wind back, the tensioning is continued until the sag is adjusted, the rope clamp is used for locking, and the connection length with the down lead is reserved at the two ends of the lightning arrester wire in advance according to the position of the grounding device.
2) And installing a grounding device: because of drought and rain shortage in the local area, one grounding electrode cannot meet the resistance requirement of the grounding resistance, the horizontal grids of the downlead flat iron and the vertical grounding electrode are connected by welding to form a grounding grid, a plurality of mortar anchor rods can be used for the grounding grid to be driven into rocks on two sides of a mountain body, the rock-entering depth of the anchor rods is not lower than 5.5m, the anchor rods are connected in parallel through the mesh downlead, and the resistance value is ensured to be lower than 4 omega.
3) The down conductor round steel 3 is installed, the down conductor round steel 3 is arranged between the lightning arrester wire 1 and the grounding grid, the down conductor round steel 3 is directly connected with the lightning arrester wire 1 through-50 × 5 hot galvanizing flat steel, and the connecting part of the down conductor round steel 3 and the grounding grid is connected in a net mode through the hot galvanizing flat steel.
Claims (5)
1. The utility model provides a special lightning protection ground system of cable crane which characterized in that: the lightning protection grounding system comprises lightning arrester wires (1), anchoring points (2), down conductor round steel (3), down conductor flat iron horizontal grids (4) and a vertical grounding electrode (5);
the lightning arrester wire (1) is locked by a rope clamp through an anchoring point (2), the rope head of the lightning arrester wire (1) is in compression joint with the down conductor round steel (3) by adopting a parallel wire clamp, the down conductor flat iron horizontal grid (4) and the vertical grounding electrode (5) are connected by welding to form a grounding grid, and the down conductor round steel (3) is in welding connection with the grounding grid;
the guiding net is arranged below the anchoring point (2) and at least 3 meters away.
2. The special lightning protection grounding system for cable crane according to claim 1, wherein: the rope end of the lightning arrester wire (1) and the down lead round steel (3) are in compression joint by a steel wire rope double-hole splayed aluminum sleeve.
3. The special lightning protection grounding system for cable crane according to claim 1, wherein: a 25mm down lead round steel (3) is adopted2Galvanized steel strandThe wire is welded with the end part of the down-lead flat iron horizontal grid (4).
4. The lightning protection grounding system special for the cable crane according to claim 1, wherein the anchor rod spacing of the vertical grounding electrode (5) is 3 × 3m, and the rock penetration depth is not less than 2.8 m.
5. The special lightning protection grounding system for cable crane according to claim 1, wherein: be equipped with a plurality of lightning-arrest side needles (6) on arrester wire (1), lightning-arrest side needle (6) cover is established on arrester wire through rubber cover (7) of stopping the source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921471606.8U CN210884975U (en) | 2019-09-05 | 2019-09-05 | Special lightning protection grounding system of cable crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921471606.8U CN210884975U (en) | 2019-09-05 | 2019-09-05 | Special lightning protection grounding system of cable crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210884975U true CN210884975U (en) | 2020-06-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921471606.8U Active CN210884975U (en) | 2019-09-05 | 2019-09-05 | Special lightning protection grounding system of cable crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210884975U (en) |
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2019
- 2019-09-05 CN CN201921471606.8U patent/CN210884975U/en active Active
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