Insulating flange assembly and electrified gas transmission pipeline

Abstract

The utility model discloses an insulating flange assembly and an electrified gas transmission pipeline, and by adopting the insulating flange assembly, insulation between two flanges can be realized while two metal pipelines are connected. The insulating flange assembly comprises a first metal flange (6), a second metal flange (4), a first annular insulating spacer (5), a second annular insulating spacer (3) and a plurality of fasteners. And the second metal flange (4) and the first metal flange (6) are oppositely arranged. And the first annular insulating spacer (5) is arranged between the first metal flange (6) and the second metal flange (4). And the second annular insulating spacer (3) is arranged on one side, far away from the first metal flange (6), of the second metal flange (4). The fastener sequentially penetrates through the second annular insulation spacer (3), the second metal flange (4), the first annular insulation spacer (5) and the first metal flange (6), and the fastener is not in contact with the second metal flange (4) and the first metal flange (6).

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline connection, and particularly relates to an insulating flange assembly and an energized gas transmission pipeline. Background Art

[0002] In scientific research and industrial production, the heating process of gases in metal pipelines is often involved. Heating electrodes are clamped at both ends of the metal pipeline. When direct current on the heating electrodes passes through the metal pipeline, heat is generated according to the Joule effect and transferred to the gas flowing in the metal pipeline. This heating method is widely used because the heat generation and transfer process is more uniform than most other heating methods.

[0003] However, in practical applications, existing metal pipeline connectors are all conductive, which causes the heating electrodes to be easily connected to other connected metal pipelines, resulting in the pipelines that should not be electrified in design being electrified or even heated. This not only poses a potential risk of electric shock when personnel touch the metal pipeline, but also reduces the current heating efficiency and increases the heating energy consumption. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide an insulating flange assembly and an energized gas transmission pipeline for the above-mentioned deficiencies existing in the prior art. By using this insulating flange assembly, while connecting two metal pipelines, insulation between the two flanges can also be achieved.

[0005] In a first aspect, an embodiment of the utility model provides an insulating flange assembly, which includes a first metal flange, a second metal flange, a first annular insulating gasket, a second annular insulating gasket, and a plurality of fasteners. The second metal flange is disposed opposite to the first metal flange. The first annular insulating gasket is disposed between the first metal flange and the second metal flange. The second annular insulating gasket is disposed on a side of the second metal flange away from the first metal flange. The fasteners sequentially pass through the second annular insulating gasket, the second metal flange, the first annular insulating gasket, and the first metal flange, and the fasteners are not in contact with the second metal flange and the first metal flange; a first end of the fastener presses the second annular insulating gasket, and a second end of the fastener presses the first metal flange.

[0006] In some embodiments, the insulating flange assembly further includes an annular metal gasket. The annular metal gasket is disposed on a side of the second annular insulating gasket away from the first metal flange. The fasteners pass through the annular metal gasket and then through the second annular insulating gasket, and the first end of the fastener presses the second annular insulating gasket through the annular metal gasket.

[0007] In some embodiments, the annular metal gasket includes a first semi-circular ring-shaped metal gasket and a second semi-circular ring-shaped metal gasket, and the first semi-circular ring-shaped metal gasket and the second semi-circular ring-shaped metal gasket are disposed opposite to each other. The first end of at least one of the fasteners presses the second annular insulating gasket through the first semi-circular ring-shaped metal gasket, and the first end of at least one of the fasteners presses the second annular insulating gasket through the second semi-circular ring-shaped metal gasket.

[0008] In some embodiments, each of the fasteners includes a double-headed bolt and two nuts. The double-headed bolt sequentially passes through the second annular insulating gasket, the second metal flange, the first annular insulating gasket, and the first metal flange; the double-headed bolt is not in contact with the second metal flange and the first metal flange. The two nuts are respectively threadedly connected to both ends of the double-headed bolt to form the first end and the second end of the fastener, so as to press the second annular insulating gasket and the first metal flange respectively.

[0009] In some embodiments, a plurality of first through holes are formed in the first metal flange, and the number of the first through holes is the same as the number of the fasteners; a plurality of second through holes are provided in the second metal flange, and the positions and numbers of the plurality of second through holes correspond to those of the plurality of first through holes; one of the fasteners passes through one of the first through holes and one of the second through holes;

[0010] The diameters of the first through holes and the second through holes are both larger than the outer diameter of the double-headed bolt.

[0011] In some embodiments, the plurality of first through holes are evenly distributed along the axis of the first metal flange.

[0012] In some embodiments, the material of the first annular insulating gasket is a flexible insulating material.

[0013] In some embodiments, the surface of the first annular insulating gasket is coated with an anti-corrosion coating.

[0014] Therefore, for the insulating flange assembly provided by the embodiment of the present utility model, by arranging a first annular insulating gasket between the first metal flange and the second metal flange, insulation and sealing between the first metal flange and the second metal flange can be achieved; by arranging a second annular insulating gasket on the side of the second metal flange away from the first metal flange and pressing the first end of the fastener against the second annular insulating gasket and the second end of the fastener against the first metal flange, the first metal flange and the second metal flange can be pressed by the fastener, and moreover, the second annular insulating gasket can maintain insulation between the second metal flange and the fastener; by making the fastener have no contact with both the second metal flange and the first metal flange, even when the fastener passes through the second metal flange and the first metal flange, insulation between the fastener and the second metal flange and the first metal flange can be achieved, thereby maintaining insulation between the first metal flange and the second metal flange. Therefore, insulation between the first metal flange and the second metal flange is achieved through the above-mentioned multiple insulation arrangements.

[0015] In a second aspect, the embodiment of the present utility model further provides a current-carrying gas transmission pipeline, which includes a first metal pipeline, a second metal pipeline, and the insulating flange assembly in the first aspect. The first metal pipeline and the second metal pipeline are used for transmitting gas; the first metal flange of the insulating flange assembly is fixed to one end of the first metal pipeline, the second metal flange of the insulating flange assembly is fixed to one end of the second metal pipeline, and the first metal pipeline and the second metal pipeline are interconnected through the insulating flange assembly. Two heating electrodes are respectively arranged at both ends of the first metal pipeline, and after the two heating electrodes are electrified, they are used for heating the gas inside the first metal pipeline.

[0016] In some embodiments, the first metal flange and the first metal pipeline are fixed by welding, and / or the second metal flange and the second metal pipeline are fixed by welding.

[0017] The current-carrying gas transmission pipeline provided by the embodiment of the present utility model has the same beneficial effects as the above-mentioned insulating flange assembly, which will not be elaborated here. Description of the Drawings

[0018] Figure 1 : A schematic diagram of an insulating flange assembly provided by an embodiment of the present utility model;

[0019] Figure 2 : A top view of an insulating flange assembly provided by an embodiment of the present utility model;

[0020] Figure 3 : An exploded view of an insulating flange assembly provided by an embodiment of the present utility model;

[0021] Figure 4: This is a half-sectional view of an insulating flange assembly provided by an embodiment of the present utility model. Detailed implementation manners

[0022] To enable those skilled in the art to better understand the technical solutions of the present utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0023] Embodiment 1:

[0024] As Figure 1 and Figure 2 shown, an embodiment of the present utility model provides an insulating flange assembly, which is applied to two connection structures that need to be connected, and can achieve insulation between two flanges.

[0025] As Figure 1 , Figure 2 and Figure 3 shown, the insulating flange assembly includes a first metal flange 6, a second metal flange 4, a first annular insulating gasket 5, a second annular insulating gasket 3, and a plurality of fasteners. The second metal flange 4 is disposed opposite to the first metal flange 6. The first annular insulating gasket 5 is disposed between the first metal flange 6 and the second metal flange 4. The second annular insulating gasket 3 is disposed on a side of the second metal flange 4 away from the first metal flange 6. The fasteners sequentially pass through the second annular insulating gasket 3, the second metal flange 4, the first annular insulating gasket 5, and the first metal flange 6, and there is no contact between the fasteners and the second metal flange 4 and the first metal flange 6; a first end of the fastener presses the second annular insulating gasket 3, and a second end of the fastener presses the first metal flange 6.

[0026] The first metal flange 6 and the second metal flange 4 can be respectively connected to external structural members.

[0027] For example, the first metal flange 6 and the second metal flange 4 are respectively connected to two external connecting shafts, and after the first metal flange 6 and the second metal flange 4 are connected by fasteners, the connection between the two connecting shafts can be achieved.

[0028] Or, the first metal flange 6 and the second metal flange 4 are respectively connected to two external connecting pipes. At this time, through holes are provided in the centers of the first metal flange 6 and the second metal flange 4. After the first metal flange 6 and the second metal flange 4 are connected by fasteners, the communication between the two connecting pipes can be achieved.

[0029] The first annular insulating gasket 5 can achieve insulation and sealing between the first metal flange 6 and the second metal flange 4.

[0030] In some examples, the material of the first annular insulating gasket 5 is a flexible insulating material.

[0031] Exemplarily, the material of the first annular insulating gasket 5 is rubber, plastic and their products.

[0032] The flexible insulating material can endow the first annular insulating gasket 5 with a certain deformation ability, which is beneficial to enhancing the sealing performance between the first metal flange 6 and the second metal flange 4.

[0033] Exemplarily, the material of the second annular insulating gasket 3 can be common insulating materials, such as plastics, rubbers, ceramics, etc.

[0034] Exemplarily, the fasteners can include bolts, screws, etc.

[0035] Combined with Figure 1 and Figure 3 , the two ends of the fasteners respectively press the second annular insulating gasket 3 and the first metal flange 6, which can make the second metal flange 4 and the first metal flange 6 press against each other, and squeeze the first annular insulating gasket 5, further enhancing the sealing performance between the first metal flange 6 and the second metal flange 4.

[0036] Exemplarily, the number of the fasteners can be two, three, four, etc. Arranging multiple fasteners can increase the connection strength between the first metal flange 6 and the second metal flange 4 and press the first metal flange 6 and the second metal flange 4 at multiple positions.

[0037] The fasteners are generally made of conductive metal materials. In this embodiment, by making the fasteners have no contact with the second metal flange 4 and the first metal flange 6, the current of the second metal flange 4 or the first metal flange 6 cannot be transmitted through the fasteners, and the insulation between the second metal flange 4 and the first metal flange 6 can be maintained when the fasteners pass through the second metal flange 4 and the first metal flange 6.

[0038] As Figure 1 and Figure 3 shown, the first end of the fastener presses the second annular insulating gasket 3, and the fastener has no direct contact with the second metal flange 4. Therefore, the second annular insulating gasket 3 can realize the insulation between the second metal flange 4 and the fastener. At this time, even if the current on the first metal flange 6 can be transmitted through the fastener, it cannot be transmitted to the second metal flange 4 through the second annular insulating gasket 3, and the insulation between the first metal flange 6 and the second metal flange 4 can also be maintained.

[0039] Therefore, the insulating flange assembly provided by the embodiment of the present invention can achieve insulation and sealing between the first metal flange 6 and the second metal flange 4 by disposing a first annular insulating gasket 5 between the first metal flange 6 and the second metal flange 4. By disposing a second annular insulating gasket 3 on the side of the second metal flange 4 away from the first metal flange 6, and by having the first end of the fastener press against the second annular insulating gasket 3 and the second end of the fastener press against the first metal flange 6, the first metal flange 6 and the second metal flange 4 can be compressed by the fastener, and the second annular insulating gasket 3 can maintain insulation between the second metal flange 4 and the fastener. By ensuring that the fastener has no contact with the second metal flange 4 and the first metal flange 6, insulation can be achieved between the fastener and the second metal flange 4 and the first metal flange 6 even when the fastener passes through the second metal flange 4 and the first metal flange 6, thereby maintaining insulation between the first metal flange 6 and the second metal flange 4. Therefore, insulation between the first metal flange 6 and the second metal flange 4 is achieved through the above-mentioned multiple insulation arrangements.

[0040] Furthermore, the insulating flange assembly of this embodiment has a simple structure, avoiding the cumbersome insulating bolt sleeve arrangement of existing insulating flanges, simplifying the processing and assembly of the insulating flange. The technical solution of this embodiment is also applicable to the insulation transformation of common non-insulating metal flanges.

[0041] In some embodiments, as Figure 1 and Figure 3 As shown, the insulating flange assembly also includes an annular metal gasket. The annular metal gasket is disposed on the side of the second annular insulating gasket 3 away from the first metal flange 6. The fastener passes through the annular metal gasket and then through the second annular insulating gasket 3. The first end of the fastener is pressed against the second annular insulating gasket 3 through the annular metal gasket.

[0042] The annular metal gasket has high strength. After the first end of the fastener is pressed on the annular metal gasket, the pressure applied by the first end of the fastener can be dispersed on the second annular insulating gasket 3 through the annular metal gasket, so that the second annular insulating gasket 3 is evenly stressed, avoiding damage to the second annular insulating gasket 3 due to excessive pressure on the first end of the fastener.

[0043] In some embodiments, as Figure 1 and Figure 2 As shown, the annular metal gasket includes a first semi-circular metal gasket 1 and a second semi-circular metal gasket 2, which are arranged opposite each other. The first end of at least one fastener presses the second annular insulating gasket 3 through the first semi-circular metal gasket 1, and the first end of at least one fastener presses the second annular insulating gasket 3 through the second semi-circular metal gasket 2.

[0044] Exemplarily, as Figure 2 shown, in this embodiment, the number of fasteners can be four. Two of the fasteners press the second annular insulating gasket 3 through the first semi-circular metal gasket 1, and the other two fasteners press the second annular insulating gasket 3 through the second semi-circular metal gasket 2.

[0045] In some embodiments, in combination with Figure 1 and Figure 4 , each fastener includes a double-headed bolt and two nuts. The double-headed bolt sequentially passes through the second annular insulating gasket 3, the second metal flange 4, the first annular insulating gasket 5, and the first metal flange 6. The double-headed bolt has no contact with the second metal flange 4 and the first metal flange 6. The two nuts are respectively threadedly connected to both ends of the double-headed bolt to form the first end and the second end of the fastener, so as to press the second annular insulating gasket 3 and the first metal flange 6 respectively.

[0046] It can be understood that after the double-headed bolt sequentially passes through the second annular insulating gasket 3, the second metal flange 4, the first annular insulating gasket 5, and the first metal flange 6, the two nuts are threadedly connected to both ends of the double-headed bolt. By tightening the two nuts, the second annular insulating gasket 3 and the first metal flange 6 are pressed.

[0047] Through the above settings, it is convenient to install and disassemble the insulating flange assembly.

[0048] In some embodiments, as Figure 4 shown, a plurality of first through holes are formed on the first metal flange 6, and the number of the first through holes is the same as the number of the fasteners; a plurality of second through holes are provided on the second metal flange 4, and the positions and numbers of the plurality of second through holes correspond to those of the plurality of first through holes; a fastener passes through a first through hole and a second through hole. The diameters of the first through hole and the second through hole are both larger than the outer diameter of the double-headed bolt.

[0049] Exemplarily, Figure 4 in, the number of fasteners is four, and the number of the first through holes on the first metal flange 6 and the number of the second through holes on the second metal flange 4 are also four.

[0050] The diameters of the first through hole and the second through hole are both larger than the outer diameter of the double-headed bolt. Therefore, when the double-headed bolt is inserted into the first through hole on the first metal flange 6 and the second through hole on the second metal flange 4, the double-headed bolt has no contact with the first metal flange 6 and the second metal flange 4.

[0051] Those skilled in the art should understand that through holes for the double-headed bolts to pass through are provided on the first semi-circular metal gasket 1, the second semi-circular metal gasket 2, the second annular insulating gasket 3, and the first annular insulating gasket 5. The aperture of the first through hole on the first metal flange 6 is smaller than the outer diameter of the bolt. The apertures of the through holes for the double-headed bolts to pass through on the first semi-circular metal gasket 1, the second semi-circular metal gasket 2, and the second annular insulating gasket 3 are also smaller than the outer diameter of the bolt.

[0052] In some embodiments, in combination with Figure 2 and Figure 4 , a plurality of first through holes are evenly distributed along the axis of the first metal flange 6.

[0053] In this way, a plurality of fasteners can be evenly distributed on the first metal flange 6, making the clamping force finally applied by the fasteners on the first metal flange 6 and the second metal flange 4 more uniform, which is beneficial to dispersing the stress on the first metal flange 6 and the second metal flange 4, and making the connection between the first metal flange 6 and the second metal flange 4 more firm, thereby increasing the airtightness between the first metal flange 6 and the second metal flange 4.

[0054] In some embodiments, an anti-corrosion coating is applied to the surface of the first annular insulating gasket 5.

[0055] The anti-corrosion coating can increase the anti-corrosion performance of the first annular insulating gasket 5, thereby increasing the service life of the first annular insulating gasket 5, and thus maintaining the insulation and sealing performance between the first metal flange 6 and the second metal flange 4 for a long time.

[0056] Embodiment 2:

[0057] The embodiment of the present utility model further provides an energized gas transmission pipeline, which includes a first metal pipeline, a second metal pipeline, and the insulating flange assembly in Embodiment 1. The first metal pipeline and the second metal pipeline are used for transmitting gas. The first metal flange 6 of the insulating flange assembly is fixed at one end of the first metal pipeline, the second metal flange 4 of the insulating flange assembly is fixed at one end of the second metal pipeline, and the first metal pipeline and the second metal pipeline are interconnected through the insulating flange assembly. Two heating electrodes are respectively arranged at both ends of the first metal pipeline, and after being energized, the two heating electrodes are used to heat the gas inside the first metal pipeline.

[0058] Exemplarily, the second annular insulating gasket 3 is sleeved on the second metal pipeline.

[0059] It can be understood that in this case, through holes are provided on both the first metal flange 6 and the second metal flange 4, and the first metal pipeline and the second metal pipeline are interconnected through the through holes on the first metal flange 6 and the second metal flange 4.

[0060] The first metal pipe and the second metal pipe can be copper pipes, stainless steel pipes, etc.

[0061] Through the above settings, the gas flowing through the first metal pipe can be heated by the current. Moreover, because the first metal flange 6 and the second metal flange 4 of the insulating flange assembly are insulated from each other, the current on the first metal pipe cannot flow to the second metal pipe through the first metal flange 6 and the second metal flange 4, thereby reducing power consumption and ensuring the heating efficiency of the first metal pipe. The above settings can also keep the second metal pipe in an uncharged state, avoid abnormal heating of the second metal pipe, and avoid the risk of electric shock when the staff touches the second metal pipe.

[0062] In some embodiments, the first metal flange 6 and the first metal pipe are fixed by welding.

[0063] This can increase the connection strength between the first metal flange 6 and the first metal pipe.

[0064] In some examples, the second metal flange 4 and the second metal pipe are fixed by welding.

[0065] This can increase the connection strength between the second metal flange 4 and the second metal pipe.

[0066] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principle of the present invention. However, the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims

1. An insulating flange assembly, characterized in that, Comprising: A first metal flange (6); A second metal flange (4), disposed opposite to the first metal flange (6); A first annular insulating gasket (5), disposed between the first metal flange (6) and the second metal flange (4); A second annular insulating gasket (3), disposed on a side of the second metal flange (4) away from the first metal flange (6); and A plurality of fasteners, the fasteners sequentially passing through the second annular insulating gasket (3), the second metal flange (4), the first annular insulating gasket (5) and the first metal flange (6), and the fasteners having no contact with the second metal flange (4) and the first metal flange (6); a first end of the fastener pressing the second annular insulating gasket (3), and a second end of the fastener pressing the first metal flange (6).

2. The insulating flange assembly according to claim 1, wherein Further comprising an annular metal gasket; The annular metal gasket is disposed on a side of the second annular insulating gasket (3) away from the first metal flange (6); The fastener passes through the annular metal gasket and then through the second annular insulating gasket (3), and a first end of the fastener presses the second annular insulating gasket (3) through the annular metal gasket.

3. The insulating flange assembly according to claim 2, wherein The annular metal gasket includes a first semi-circular ring metal gasket (1) and a second semi-circular ring metal gasket (2), the first semi-circular ring metal gasket (1) and the second semi-circular ring metal gasket being disposed opposite to each other; A first end of at least one of the fasteners presses the second annular insulating gasket (3) through the first semi-circular ring metal gasket (1), and a first end of at least one of the fasteners presses the second annular insulating gasket (3) through the second semi-circular ring metal gasket (2).

4. The insulating flange assembly according to claim 1, wherein Each of the fasteners includes a stud bolt and two nuts; The stud bolt sequentially passes through the second annular insulating gasket (3), the second metal flange (4), the first annular insulating gasket (5) and the first metal flange (6); the stud bolt has no contact with the second metal flange (4) and the first metal flange (6); The two nuts are respectively threadedly connected to two ends of the stud bolt to form a first end and a second end of the fastener, so as to press the second annular insulating gasket (3) and the first metal flange (6) respectively.

5. The insulating flange assembly according to claim 4, characterized in that, A plurality of first through holes are formed in the first metal flange (6), and the number of the first through holes is the same as the number of the fasteners; a plurality of second through holes are provided on the second metal flange (4), and the positions and the number of the plurality of second through holes correspond to those of the plurality of first through holes; one of the fasteners passes through one of the first through holes and one of the second through holes; The aperture of the first through hole and the aperture of the second through hole are both larger than the outer diameter of the stud bolt.

6. The insulating flange assembly according to claim 5, wherein, The plurality of first through holes are uniformly distributed along the axis of the first metal flange (6).

7. The insulating flange assembly according to any one of claims 1-6, wherein The material of the first annular insulating gasket (5) is a flexible insulating material.

8. The insulating flange assembly according to any one of claims 1-6, characterized in that The surface of the first annular insulating gasket (5) is coated with an anti-corrosion coating.

9. An energized gas transmission pipeline, characterized in that, Comprising a first metal pipe, a second metal pipe and the insulating flange assembly according to any one of claims 1-8; The first metal pipe and the second metal pipe are used for transporting gas; The first metal flange (6) of the insulating flange assembly is fixed to one end of the first metal pipe, the second metal flange (4) of the insulating flange assembly is fixed to one end of the second metal pipe, and the first metal pipe and the second metal pipe are interconnected through the insulating flange assembly; Two heating electrodes are respectively arranged at both ends of the first metal pipe, and the two heating electrodes are used for heating the gas inside the first metal pipe after being energized.

10. The energized gas transmission pipe according to claim 9, characterized in that The first metal flange (6) and the first metal pipe are fixed by welding, and / or the second metal flange (4) and the second metal pipe are fixed by welding.

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