Metal pipeline electrostatic bridging assembly

Abstract

The utility model discloses a metal pipeline static bridging assembly, metal pipelines are connected through a flange plate, an insulating layer is arranged on the flange plate, the metal pipeline static bridging assembly is arranged on the flange plate, the metal pipeline static bridging assembly comprises a bolt and nuts, the bolt and the nuts are connected with the flange plate, the bolt penetrates through the flange plate, and the two nuts are located on the two sides of the flange plate respectively. Two ends of the bolt are in threaded connection; a gasket is arranged between the nut and the flange plate; the contact surface of the gasket and the flange is provided with sharp teeth, and the sharp teeth pierce the anti-rust paint layer on the flange plate when the nut is tightened, so that the flange plate is electrically communicated with the nut; the nut, the bolt and the gasket are all of a conductive structure, and static electricity is transmitted to the nut from the flange plate after passing through the gasket, transmitted to the nut on the other side through the bolt and then transmitted to the flange plate on the other side from the nut on the other side. The bridging mode is less influenced by the external environment, is particularly labor-saving, time-saving and material-saving, and is high in construction efficiency.

Description

Technical Field

[0001] This utility model relates to the field of pipeline installation technology, specifically to a metal pipeline electrostatic bridging assembly. Background Technology

[0002] When materials are transported through metal pipes, static electricity can easily be generated due to friction between the fluid and the pipe's inner wall. When static electricity accumulates to a certain level, it may trigger electrostatic discharge, producing sparks that can ignite surrounding flammable and explosive materials, causing serious accidents such as fires or explosions.

[0003] To address this, a conductor is typically used to connect both sides of the flange to the entire system, forming an equipotential body. This allows the static charge to be quickly dissipated, preventing static accumulation and thus eliminating the hazards of static electricity.

[0004] However, for rust prevention, a thick layer of insulating paint is usually sprayed on the flanges connecting two metal pipes. Therefore, it is not possible to directly connect the two flanges with wires. In the existing technology, holes are usually drilled and tapped at the edge of the flange to install the connection terminal of the jumper wire. The electricity on the flange is conducted to the jumper wire through the drilled hole, and then to the other flange through the jumper wire; or the jumper wire is directly installed on the two pipes to achieve the connection between the two pipes.

[0005] For example, patent application number CN201710108458.2 discloses an anti-static bonding device for metal pipes and its application, including a bonding flat steel bar, a bonding wire, a copper terminal block, bolts, nuts, and washers. The lower part of the bonding flat steel bar is a fixed end, and the upper part is a connecting end. The fixed end is welded to the outer wall of the metal pipe using hot melt welding or argon arc welding. The connecting end has an opening and is connected to the copper terminal block through bolts, nuts, and washers. The copper terminal block and the bonding wire are tin-plated and crimped together. This anti-static bonding device provides static electricity that flows through the bonding flat steel bar and bonding wire, achieving equipotentiality. However, this connection method requires additional wires, and the bonding wires must be installed after the pipeline is installed, resulting in low construction efficiency. Furthermore, corrosion or even detachment due to rain or changes in external temperature can lead to the failure of the anti-static bonding. Utility Model Content

[0006] The purpose of this application is to solve the problems of low construction efficiency, easy corrosion and peeling of electrostatic bridging in the prior art. Therefore, this utility model provides a metal pipe electrostatic bridging assembly, which provides a toothed gasket between a conductive nut and a flange. Tightening the nut can cause the toothed gasket to pierce the anti-rust paint layer on the flange, so that static electricity can be conducted through the nut and bolt to realize the electrical connection between the two flanges.

[0007] To achieve the above objectives, this utility model provides a metal pipe electrostatic bridging assembly. The metal pipe is connected by a flange, and the flange has a rust-proof paint layer. The metal pipe electrostatic bridging assembly is disposed on the flange and includes bolts, nuts, and gaskets for connecting the flange. The bolts pass through the flange, and the two nuts are located on both sides of the flange and are threaded to both ends of the bolts.

[0008] A gasket is provided between the nut and the flange; the contact surface of the gasket and the flange has sharp teeth, and when the nut is tightened, the sharp teeth pierce the anti-rust paint layer on the flange and make electrical contact with the flange;

[0009] The nuts, bolts, and washers are all conductive. The static electricity is transmitted from the flange to the nut through the washers, then to the nut on the other side through the bolts, and finally to the flange on the other side, thus achieving an electrical connection between the two flanges.

[0010] The above technical solution uses bolts and nuts to bridge pipes. This connection method is low-cost, does not require additional wiring, and the bolts and nuts can also serve to fasten the flange. Pipes can be bridged during the flange tightening process, which is more time-saving and labor-saving. It also solves the problem that the bridge wire is prone to corrosion or even falling off due to rain or changes in external temperature.

[0011] In some embodiments, the fangs are composed of multiple square plates, obliquely arranged on the gasket in a ratchet shape, which pierce the insulating and anti-rust layer on the flange through the edges of the square plates;

[0012] The inclined fangs are directed toward the direction of rotation of the nut that is loosening, thus restricting the nut from rotating in that direction.

[0013] By adopting the above implementation scheme, the nuts with washers can be tightened more easily. After tightening, the sharp teeth on the washer pierce the insulation layer on the flange and connect with the flange. The sharp teeth are set at an angle and are ratcheted, which can increase the resistance when the nut rotates in the opposite direction and prevent the nut from loosening.

[0014] In some embodiments, the fangs are disposed on the side of the gasket, with the tip of the fangs being higher than the bottom surface of the gasket, so that the fangs contact the flange.

[0015] Using the above implementation scheme, the spiky teeth on the side can pierce the insulation layer on the flange and thus conduct electricity.

[0016] In some embodiments, the canines are disposed on the bottom surface of the gasket.

[0017] By adopting the above implementation scheme, more sharp teeth can be set on the bottom surface of the gasket, so that the flange and the gasket have a larger contact surface, increasing friction and preventing loosening.

[0018] In some embodiments, the nut has a groove corresponding to the tooth, so that the tooth can be engaged in the groove, restricting the relative rotation of the washer and the nut.

[0019] By adopting the above implementation scheme, the force between the washer and the nut is increased, so that more of the torsional force of the nut is transferred to the washer, enabling the washer to pierce the insulation layer.

[0020] In some embodiments, the canines are integrally formed with the gasket.

[0021] The above implementation scheme increases the structural strength of the gasket.

[0022] In some embodiments, the nuts, bolts, and washers are all made of stainless steel.

[0023] In summary, compared with the prior art, the beneficial effects of this utility model are as follows: by setting a gasket with sharp teeth to pierce the protective layer of the flange, the flanges of two connected pipes can be electrically connected by bolts and nuts. This bridging method is less affected by the external environment and is particularly labor-saving, time-saving, and material-saving, with high construction efficiency.

[0024] Other features and corresponding beneficial effects of this application will be described in the latter part of the specification, and it should be understood that at least some of the beneficial effects will become obvious from the description in this application. Attached Figure Description

[0025] The present invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings. The drawings are not drawn to scale; their purpose is to illustrate the gist of the invention.

[0026] Figure 1 This is a schematic diagram of the electrostatic bridging assembly installed on the flange according to an embodiment of the present invention;

[0027] Figure 2 These are the front and side views of the gasket according to an embodiment of the present utility model.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Flange; 2. Gasket; 21. Tooth; 3. Nut; 4. Bolt; 5. Sealing gasket. Detailed Implementation

[0030] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0031] In the description of this utility model, it should be noted that the terms "center," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0033] Example

[0034] Please see Figure 1-2 This embodiment provides a metal pipe electrostatic bridging assembly. The metal pipe is connected by a flange 1, and the flange 1 has an insulating anti-rust layer. The metal pipe electrostatic bridging assembly is disposed on the flange 1 and includes bolts 4 and nuts 3 that connect the flange 1. The bolts 4 pass through the flange 1, and the two nuts 3 are located on both sides of the flange 1 and are threaded to the two ends of the bolts 4.

[0035] A gasket 2 is provided between the nut 3 and the flange 1; the contact surface between the gasket 2 and the flange has sharp teeth 21. When the nut 3 is tightened, the sharp teeth 21 pierce the anti-rust paint layer on the flange 1, so that the flange 1 and the nut 3 are electrically connected.

[0036] Specifically, the nut 3, bolt 4, and washer 2 are all conductive structures. Static electricity is transmitted from the flange 1 to the nut 3 through the washer 2, and then to the nut 3 on the other side through the bolt 4, and then from the nut 3 on the other side to the flange 1 on the other side.

[0037] It should be noted beforehand that when connecting metal pipes, the ends of the pipes to be connected have flanges 1, which are electrically connected to the metal pipes. The two flanges 1 are fixed together by bolts 4 to achieve the connection of the pipes. However, for the purpose of rust prevention, the flanges 1 are often covered with a layer of non-conductive paint, and a sealing gasket 5 is also set between the two flanges 1. This results in the two pipes not being electrically connected, which can easily lead to the inability to discharge the charge in some pipes, causing safety hazards.

[0038] In the embodiments of this application, a gasket 2 with sharp teeth 21 is provided between the nut 3 and the flange 1 for fastening the flange 1. During the process of fastening the nut 3, the sharp teeth 21 can pierce the insulation layer on the flange 1 to achieve an electrical connection between the flange 1 and the nut 3. In addition, this application uses stainless steel nuts 3 and bolts 4, so the charge can be transferred from one flange 1 to another flange 1 through the bolt 4 to achieve the bridging of the flange 1.

[0039] Specifically, the fang 21 is composed of multiple square plates, which are obliquely disposed on the side of the gasket 2. In some embodiments, the square plates can also be disposed on the bottom surface of the gasket, and are ratchet-shaped, piercing the insulation layer on the flange 1 through the edges of the square plates.

[0040] Specifically, the outer circumferential dimensions of the gasket match the dimensions of the nut.

[0041] The inclined direction of the slanted teeth 21 is towards the direction of rotation of the loosened nut 3, thus restricting the rotation of the nut 3 in the direction of loosening. On the other hand, it can also reduce the friction between the gasket and the nut, reduce the rotation of the gasket during insertion, and prevent the slanted teeth on the gasket from scratching more of the anti-rust layer and causing corrosion of the flange.

[0042] See Figure 2 In some embodiments, the fangs 21 are disposed on the side of the gasket 2, and the tip of the fangs 21 is higher than the bottom surface of the gasket 2, so that the fangs 21 can contact the flange 1.

[0043] Specifically, the nuts 3 on both sides need to be tightened to ensure that the sharp teeth 21 on both sides of the flange 1 can pierce the insulation layer on the surface of the flange 1 and make contact with the inside of the flange 1.

[0044] Specifically, the canine 21 and the gasket 2 are integrally molded.

[0045] Specifically, nut 3, bolt 4, and washer 2 are all made of stainless steel.

[0046] Specifically, two or more metal pipe electrostatic bridging assemblies need to be installed on a flange 1, but not all of them need to be installed. After the metal pipe electrostatic bridging assemblies are installed, the resistance between the two metal pipes needs to be tested. The resistance needs to be less than the specified value of 0.03 ohms.

[0047] Those skilled in the art should understand that variations can be implemented by combining existing technology with the above embodiments, which will not be elaborated here. Such variations do not affect the substantive content of this utility model, and will not be elaborated here.

[0048] The preferred embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above. Devices and structures not described in detail herein should be understood as being implemented in a conventional manner within the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of this utility model using the disclosed methods and techniques, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. This does not affect the essential content of this utility model. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the content of the technical solution of this utility model, still fall within the protection scope of the technical solution of this utility model.

Claims

1. A metal pipe electrostatic bridging assembly, wherein the metal pipes are connected via flanges (1) and the flanges (1) have a rust-proof paint layer, characterized in that, The electrostatic bridging assembly for the metal pipe is disposed on the flange (1) and includes bolts (4), nuts (3) and gaskets (2) for connecting the flange (1). The bolts (4) pass through the flange (1), and the two nuts (3) are located on both sides of the flange (1) and are threaded to the two ends of the bolts (4). A gasket (2) is provided between the nut (3) and the flange (1); the gasket (2) has sharp teeth (21) on the contact surface with the flange. When the nut (3) is tightened, the sharp teeth (21) pierce the anti-rust paint layer on the flange (1) and make electrical contact with the flange (1). The nut (3), bolt (4) and washer (2) are all conductive structures.

2. The electrostatic bridging assembly for metal pipes according to claim 1, characterized in that, The fang (21) is composed of multiple square plates, which are inclinedly arranged on the gasket (2) in a ratchet shape, and pierce the insulation layer on the flange (1) through the edges of the square plates; The inclined cusp (21) is directed toward the direction of rotation of the nut (3) to prevent it from loosening and thus restricts the nut (3) from rotating in that direction.

3. The electrostatic bridging assembly for metal pipes according to claim 1, characterized in that, The cannon (21) is disposed on the side of the gasket (2), and the tip of the cannon (21) is higher than the bottom surface of the gasket (2), so that the cannon (21) contacts the flange (1).

4. The electrostatic bridging assembly for metal pipes according to claim 1, characterized in that, The canine (21) is disposed on the bottom surface of the gasket (2).

5. The electrostatic bridging assembly for metal pipes according to claim 1, characterized in that, The washer (2) also has serrations (21) on the contact surface of the nut (3).

6. The electrostatic bridging assembly for metal pipes according to claim 1, characterized in that, The canine (21) and the gasket (2) are integrally formed.

7. The electrostatic bridging assembly for metal pipes according to claim 1, characterized in that, The nut (3), bolt (4) and washer (2) are all made of stainless steel.

Images