CN216187972U

CN216187972U - Lightning current shunt with reverse rotation prevention protection device

Info

Publication number: CN216187972U
Application number: CN202121892667.9U
Authority: CN
Inventors: 陈丽; 王波
Original assignee: Jiangsu Yulei Safety Technology Co ltd
Current assignee: Jiangsu Yulei Safety Technology Co ltd
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2022-04-05
Anticipated expiration: 2031-08-13

Abstract

The utility model belongs to the technical field of lightning current diversion of a floating roof storage tank, and particularly relates to a lightning current diverter with an anti-reverse protection device. The service life of the flat spiral spring and the equipment is prolonged.

Description

Lightning current shunt with reverse rotation prevention protection device

Technical Field

The utility model belongs to the technical field of lightning current shunt of a floating roof storage tank, and particularly relates to a lightning current shunt with an anti-reverse protection device.

Background

Large crude oil storage tanks are typically floating roof tanks, the floating deck of which floats on the crude oil when in use. Currently, in order to prevent the crude oil and steam from leaking from the edge of the float, it is common to seal it, which is done with a non-conductive material, typically nitrile rubber, which electrically insulates the float from the tank wall, making it an isolated conductor. Because of the high resistivity of crude oil, the crude oil can generate a large amount of static charges when lightning happens and the crude oil is quickly canned, the charges are gradually transferred to a conductor with attractive force with opposite charges, the floating disc collects the static charges of the crude oil under the influence of the low potential of the tank wall, the induction voltage of the static charges can reach hundreds of kilovolts, the air breakdown voltage is about 500kV/m, the gap between a standard floating disc and the tank wall is about 250mm, the gap between the floating disc and the tank wall can be reduced due to the aging of sealing materials and process deviation, the static charge induction voltage between the floating disc and the tank wall can form ignition flashover discharge when the static charge induction voltage is about 100kV, and once the aging oil and steam of the sealing materials overflow, a fire accident can be caused. The national standards 'oil depot design code' (GB 50074-2002) and 'lightning safety code for oil and oil facilities' (GB15599-95) have clear regulations on lightning protection and anti-static grounding of floating discs: the floating roof oil tank or the inner floating roof oil tank should not be provided with a lightning rod, but the floating roof and the tank body should be electrically connected by 2 wires. The connecting wire of the floating roof oil tank is a soft copper composite stranded wire with the cross section not less than 25mm 2. For the internal floating roof oil tank, the steel floating plate oil tank connecting lead is a soft copper composite stranded wire with the cross section not less than 16mm 2; the connecting lead of the aluminum floating plate oil tank is a stainless steel wire rope with the diameter not less than 1.8 mm. The traditional lightning protection and anti-static grounding mode of the floating plate of the crude oil storage tank generally adopts two 25mm2 soft copper composite stranded wires to be connected with the floating plate by the top end of the tank wall of the storage tank according to the length larger than the height of the tank, when the floating plate rises along with the liquid level, the soft copper composite stranded wires are scattered on the floating plate, and the crude oil and gas contain sulfur and wind and rain to make the soft copper composite stranded wires extremely easy to corrode, so that potential safety hazards exist.

The existing domestic and foreign floating roof tank lightning current shunts are fixed on one end of a shell and a rotating shaft by adopting a flat spiral spring in a non-flexible way, a steel braided shunt wire is fixedly wound on the other end of the rotating shaft, and the extension of the steel braided shunt wire is controlled by the elasticity of the flat spiral spring. In practical use, when the floating disc of the storage tank rises to the highest point, the steel-woven shunt wire is driven along with the up-and-down floating of the storage tank and windy weather, irregular stretching and retraction are caused, frequent telescopic vibration can cause the plane nest-rolling spring and the rotating shaft thereof in the equipment to always keep forward rotation and reverse rotation, or reverse rotation is caused when manual operation is not performed, the plane nest-rolling spring and the rotating shaft are mechanically interfered during reverse rotation, and the plane nest-rolling spring is very easy to break.

Once the spiral spring is broken, the steel braided shunt wire can not be retracted into the equipment and is scattered on the floating plate, so that secondary hidden trouble is caused.

Due to design defects, the service life of the equipment is shortened, and when the equipment is maintained and disassembled, the flat spiral spring is broken open to injure maintenance personnel by mistake.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a lightning current shunt with an anti-reverse protection device, which overcomes the defects of the prior art, changes the fixing form of a planar coil spring and a rotating shaft, and optimizes the structure of the rotating shaft. When equipment corotation, can rely on plane nest to roll up spring structure, can normally the energy storage. When equipment takes place to rotate reversely, plane nest book spring can break away from rotation axis backstop face automatically, slides to the rotation axis side along the excessive face of rotation axis circular arc, and the pivot backstop face that circles round of then to prevented plane nest book spring to jump out the fixed slot and lose power transmission, effectively protected plane nest book spring simultaneously, prevented the fracture of plane nest book spring stiff end. The service life of the flat spiral spring and the equipment is prolonged.

In order to solve the problems, the technical scheme adopted by the utility model is as follows:

a lightning current diverter with an anti-reverse protection device comprises a coil spring cavity cover plate, a rear coil plate, a front coil plate, a diverter fixing plate, a folding handle, a wire stretching and guiding device, a rain-proof cover, a tank wall fixing plate, a steel woven diversion wire, a rotating shaft and an anti-reverse protection device, wherein one end of the rotating shaft is fixed with one end of the steel woven diversion wire, and the other end of the rotating shaft is combined with the anti-reverse protection device.

The anti-reverse protection device comprises a back rolling plate, a plane nest rolling spring and a rotating shaft, wherein the back rolling plate, the plane nest rolling spring and the rotating shaft form an anti-reverse protection device, and a rotating shaft arc transition surface and a rotating shaft stop surface are arranged on the rotating shaft.

Further, the plane nest-rolling spring is fixed on the rear rolling plate through a fixing shaft, the plane nest-rolling spring is fixedly contacted with the rotating shaft through a rotating shaft stop surface, and the plane nest-rolling spring is tangent to the rotating shaft arc transition surface.

Further, the arc transition surface of the rotating shaft is machined and manufactured on the rotating shaft.

Further, the fixed shaft is an M6 inner wire straight-through hole.

When the lightning current shunt with the anti-reverse protection device is installed and used, the tank wall fixing plate is fixed on the filling wall of the crude oil floating roof tank by using an M12 stainless steel bolt, and one end of the steel braided shunt lead is fixed on a foam baffle of a floating disc of the crude oil floating roof tank by using an M12 stainless steel bolt.

Compared with the prior art, the utility model has the following beneficial effects:

1. on the basis of the original lightning current shunt structure, an anti-reverse protection device is added, and when the anti-reverse protection device is installed, the anti-reverse protection device can be installed horizontally and normally, and the installation is simple and convenient.

2. When equipment takes place the reversal, plane nest book spring can break away from the backstop face automatically, slides to the rotation axis side along the excessive face of circular arc, slides back the backstop face then to prevented plane nest book spring from jumping out the fixed slot and losing power transmission, effectively protected plane nest book spring simultaneously, prevented the fracture of plane nest book spring stiff end.

3. Secondary hidden troubles are avoided, and maintenance work is reduced.

Drawings

Fig. 1 is an axial view of a lightning current diverter.

FIG. 2 is a side view of a lightning current diverter

FIG. 3 is a diagram of the internal structure of the lightning current diverter

FIG. 4 is a diagram of the interior of a planar coil spring cavity of a lightning current diverter

FIG. 5 is a view showing the combination of the plane coil spring and the rotation shaft of the lightning current diverter

FIG. 6 is a partial enlarged view of the reverse rotation preventing protection device of the lightning current diverter

1 is coil spring chamber apron, 2 is the back roll board, 3 is preceding roll board, 4 is the shunt fixed plate, 5 is folding handle, 6 is the flexible guider of wire, 7 is rain-proof cover, 8 is jar wall fixed plate, 9 is steel and weaves the reposition of redundant personnel wire, 10 is that M6 internal thread is straight-through, 11 is the plane nest and rolls up the spring, 12 is the rotation axis, 13 is rotation axis circular arc transition face, 14 is rotation axis backstop face.

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.

Example one

As shown in the drawings, the lightning current shunt with the reverse rotation prevention protection device of the utility model comprises: 1 is coil spring chamber apron, 2 is the back roll board, 3 is preceding roll board, 4 is the shunt fixed plate, 5 is folding handle, 6 is the flexible guider of wire, 7 is rain-proof cover, 8 is jar wall fixed plate, 9 is steel and weaves the reposition of redundant personnel wire, 10 is that M6 internal thread is straight-through, 11 is the plane nest and rolls up the spring, 12 is the rotation axis, 13 is rotation axis circular arc transition face, 14 is rotation axis backstop face.

One end of a rotating shaft 12 of the lightning current shunt is fixed with one end of the steel braided shunt lead 9, and the other end of the rotating shaft 12 is combined with the anti-reverse protection device shown in figure 6; when the lightning current diverter is installed and used, the tank wall fixing plate 8 of the lightning current diverter is fixed on the tank wall of the crude oil floating roof tank by using an M12 stainless steel bolt, one end of the steel braided diversion lead 9 is fixed on a foam baffle plate of a floating disc of the crude oil floating roof tank by using an M12 stainless steel bolt, and thus an electric path is formed between the floating roof tank and the tank wall through the steel braided diversion lead 9 and the lightning current diverter so as to conduct lightning current generated by lightning stroke.

The anti-reverse protection device is formed by the 2 rear rolling plates, the 10M6 internal thread straight-through, the 11 plane coil spring, the 12 rotating shaft, the 13 rotating shaft arc transition surface and the 14 rotating shaft stop surface.

Example two

An anti-reverse protection device is characterized in that a plane nest-roll spring 11 is fixed on a rear rolling plate 2, a fixing shaft is an M6 inner wire through hole 10, the plane nest-roll spring 11 is fixedly contacted with a rotating shaft 12 through a rotating shaft stop surface 14, a rotating shaft circular arc transition surface 13 is machined and manufactured on the rotating shaft 12, and the plane nest-roll spring 11 is tangent to the rotating shaft circular arc transition surface 13 and can flexibly slide.

The structure is optimized on the basis of the rotating shaft 12, and a rotating shaft arc transition surface 13 and a rotating shaft stop surface 14 are added.

The structure is optimized on the basis of the traditional plane nest-rolling spring 11, so that the fixed end of the spring is more stable and durable.

The two are combined together to form the anti-reverse protection device, the anti-reverse protection device can automatically separate from the stop surface 14 of the rotating shaft when equipment reverses, the plane nest coil spring slides to the side surface of the rotating shaft along the arc transition surface 13 of the rotating shaft, and then the stop surface 14 of the rotating shaft slides and rotates, so that the plane nest coil spring is prevented from jumping out of the fixed groove and losing power transmission, the plane nest coil spring 11 is effectively protected, the fracture of the fixed end of the plane nest coil spring 11 is avoided, and the service life of the plane scroll spring 11 and the equipment is prolonged.

In summary, the lightning current shunt with the anti-reverse protection device is provided with the anti-reverse protection device on the basis of the original structure of the lightning current shunt, and the anti-reverse protection device can be horizontally and normally installed when being installed, so that the installation is simple and convenient. The lightning current shunt of the anti-reverse protection device can automatically separate from the stop surface 14 of the rotating shaft when equipment is reversed, the rotating shaft stop surface 14 slides to the side surface of the rotating shaft along the arc transition surface 13 of the rotating shaft, and then the rotating shaft stop surface 14 slides back, so that the situation that the flat coil spring jumps out of a fixed groove and loses power transmission is prevented, meanwhile, the flat coil spring 11 is effectively protected, the fracture of the fixed end of the flat coil spring 11 is avoided, and the service lives of the flat coil spring 11 and the equipment are prolonged.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a lightning current shunt of protection device is prevented reversing in area, includes that wind spring chamber apron, back roll board, preceding roll board, shunt fixed plate, folding handle, the flexible guider of wire, rain-proof cover, jar wall fixed plate, steel are woven and are shunted wire and rotation axis, its characterized in that: the anti-reverse protection device is also included, one end of the rotating shaft is fixed with one end of the steel braided shunt wire, and the other end of the rotating shaft is combined with the anti-reverse protection device; the anti-reversion protection device is characterized by further comprising a plane nest-rolling spring and a fixed shaft, wherein the back rolling plate, the plane nest-rolling spring and the rotating shaft form an anti-reversion protection device, and a rotating shaft arc transition surface and a rotating shaft stop surface are arranged on the rotating shaft.

2. A lightning current diverter with anti-reverse protection according to claim 1, characterized in that: the plane nest-rolling spring is fixed on the rear rolling plate through a fixing shaft, the plane nest-rolling spring is fixedly contacted with the rotating shaft through a rotating shaft stop surface, and the plane nest-rolling spring is tangent to the arc transition surface of the rotating shaft.

3. A lightning current diverter with anti-reverse protection according to claim 1, characterized in that: and the arc transition surface of the rotating shaft is machined and manufactured on the rotating shaft.

4. A lightning current diverter with anti-reverse protection according to claim 1, characterized in that: the fixed shaft is a straight through M6 internal thread.

5. A lightning current diverter with anti-reverse protection according to claim 1, characterized in that: when the lightning current shunt with the anti-reverse protection device is installed and used, the tank wall fixing plate is fixed on the filling wall of the crude oil floating roof tank by using an M12 stainless steel bolt, and one end of the steel braided shunt lead is fixed on a foam baffle of a floating disc of the crude oil floating roof tank by using an M12 stainless steel bolt.