Leaking stoppage structure of high-sulfur-content gas field metal pipeline flange and metal pipeline system

Abstract

The utility model relates to the technical field of pipeline leaking stoppage, in particular to a leaking stoppage structure of a high sulfur gas field metal pipeline flange and a metal pipeline system.The leaking stoppage structure comprises a connecting ring, and a leakage-proof rubber strip is arranged on the inner wall of the connecting ring; the two clamping rings are arranged in the connecting ring, and the two clamping rings are oppositely arranged and located on the two sides of the leakage-proof rubber strip correspondingly; the device further comprises a clamping mechanism, and the clamping mechanism can make the two clamping rings get close to or away from each other. When the anti-leakage device is applied to a metal pipeline, the connecting rings are arranged on the flange plates in a sleeving mode, the flange plates are fixed through the connecting rings, the anti-leakage rubber strip abuts against the connecting position of the two flange plates, the anti-leakage rubber strip is tightly attached to the connecting position of the two flange plates, gas leaking from the connecting position of the flange plates is blocked, and meanwhile the clamping rings are tightly attached to the flange plates; the two clamping rings get close to each other through the clamping mechanism, so that the two clamping rings clamp the flange plates, and the flange plates are attached more tightly.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline plugging, in particular to a plugging structure for a metal pipeline flange of a high-sulfur gas field and a metal pipeline system. Background Art

[0002] High-sulfur gas field metal pipelines refer to metal pipelines used in the extraction, transmission and processing of sour natural gas. These pipelines can resist the erosion of corrosive substances such as hydrogen sulfide (H2S) to ensure the safe and stable operation of the pipelines. However, after long-term use, the flanges of high-sulfur gas field metal pipelines will loosen due to wind and sun, and the connecting bolts of the flanges will loosen due to the loose fit between the flanges, causing the gas in the high-sulfur gas field metal pipelines to leak from the joints, which not only affects production efficiency, but more importantly, may cause serious safety accidents and environmental pollution.

[0003] At present, there are many devices installed on flanges on the market to make the flange connection tighter. For example, a Chinese patent with patent announcement number CN210716426U discloses a plugging tool suitable for metal pipeline flange leakage in sulfur-containing gas fields. It can clamp the flange and plug the leak under pressure without shutting down the well for treatment. It can be used as a temporary plugging device to replace the components at the leaking flange when the well is shut down for normal production, thereby reducing safety risks.

[0004] However, the above-mentioned equipment fails to provide effective sealing, resulting in poor plugging effect when facing hydrogen sulfide leakage at the flange. Utility Model Content

[0005] The utility model aims to provide a leak-proof structure for metal pipeline flanges in high-sulfur gas fields and a metal pipeline system in view of the problem that the leak-proof tool in the background technology has poor leak-proof effect when hydrogen sulfide leaks at the flange.

[0006] In a first aspect, the utility model provides a leak-proof structure for a metal pipeline flange in a high-sulfur gas field, comprising a connecting ring, on the inner wall of which a leak-proof rubber strip is provided;

[0007] It also includes two clamping rings arranged inside the connecting ring, the two clamping rings are arranged opposite to each other, and the two clamping rings are respectively located on both sides of the leak-proof rubber strip;

[0008] It also comprises a clamping mechanism, which can make the two clamping rings move closer to or farther away from each other.

[0009] The leak-proof structure of the flange of a metal pipeline in a high-sulfur gas field described in the present application includes a connecting ring, an anti-leakage rubber strip is arranged on the inner wall of the connecting ring, and also includes two clamping rings arranged inside the connecting ring, the two clamping rings are arranged opposite to each other, and the two clamping rings are located on both sides of the anti-leakage rubber strip, and also includes a clamping mechanism, the clamping mechanism can make the two clamping rings approach or move away from each other. When applied to the metal pipeline, the connecting ring is sleeved on the flange plate, and the flange plate is fixed by the connecting ring. At the same time, the anti-leakage rubber strip is abutted against the connection between the two flange plates, so that the anti-leakage rubber strip and the connection between the two flange plates are tightly fitted, thereby forming an effective flange connection. Seal to block the gas leaking from the flange connection. At the same time, a clamping ring is provided inside the connecting ring. The two clamping rings are respectively located on both sides of the leak-proof rubber strip. When applied to a metal pipe, the clamping ring is tightly attached to the flange. The two clamping rings are brought close to each other through the clamping mechanism, so that the two clamping rings clamp the flange, making the flanges fit more closely to further improve the sealing effect. Furthermore, when maintenance or loosening is required, the two clamping rings are moved away from each other through the clamping mechanism, thereby facilitating the separation of the clamping ring and the flange, facilitating the replacement of parts without replacing the entire leak-proof tool, which not only saves costs but also improves maintenance efficiency.

[0010] Preferably, the clamping mechanism comprises a slide groove arranged on the connecting ring, and the clamping mechanism further comprises a slider arranged on the clamping ring, and the slider matches the slide groove;

[0011] A clamping plate is arranged at one end of the sliding block away from the clamping ring. The clamping plate extends to the outside of the connecting ring, and two corresponding clamping plates are connected by bolts.

[0012] By arranging a slider on the clamping ring and a sliding groove on the connecting ring, the clamping ring is installed on the connecting ring so that the clamping ring and the connecting ring are matched together. Furthermore, a clamping plate is provided at one end of the slider away from the clamping ring, and the clamping plate extends to the outside of the connecting ring. The corresponding two clamping plates are bolted together. By arranging a clamping plate on the outside of the slider, the clamping plate extends to the outside of the connecting ring. After the two clamping rings are installed on the connecting ring, the corresponding two clamping plates are bolted together, so that the two clamping rings installed on the connecting ring are connected to each other. Moreover, due to the bolt connection, the two clamping rings are controlled to approach or move away from each other by tightening or loosening the nuts. When the two clamping rings are close to each other, the two clamping rings can effectively squeeze the flanges, so that the connection between the flanges is tighter.

[0013] Preferably, a first bolt hole is provided on the clamping plate;

[0014] The clamping mechanism also includes a bidirectional threaded rod, which passes through the first bolt hole to penetrate the corresponding two clamps, and both ends of the bidirectional threaded rod extend to the outside of the clamps. The ends of the bidirectional threaded rod are also sleeved with fastening nuts, and the fastening nuts are used to tighten the clamps.

[0015] By setting a first bolt hole on the clamp plate, the bidirectional threaded rod passes through the first bolt hole to penetrate the corresponding two clamp plates, and a fastening nut is also sleeved on the end of the bidirectional threaded rod. The fastening nut is used to clamp the clamp plate. When in use, the clamp plate is clamped by the fastening nut. After the clamp plate is subjected to force, the clamping ring drives the clamping ring to clamp the flange, thereby increasing the sealing between the flanges.

[0016] Preferably, the clamping ring is composed of two first arc-shaped plates, each of which is in a semicircular arc shape;

[0017] Both ends of one of the first arc-shaped plates are provided with a clamping groove, and both ends of the other first arc-shaped plate are provided with a clamping block, and the clamping groove matches the clamping block.

[0018] The clamping ring is composed of two first arc-shaped plates, so that the clamping ring is conveniently installed on the metal pipe. In addition, both ends of one first arc-shaped plate are provided with a clamping groove, and both ends of the other first arc-shaped plate are provided with a clamping block. The clamping groove matches the clamping block, so that the two first arc-shaped plates can be easily assembled together.

[0019] Preferably, the block is made of rubber.

[0020] Preferably, a rubber pad is provided on one side of the first arc-shaped plate close to the anti-leakage rubber strip.

[0021] Preferably, the connecting ring comprises two second arc-shaped plates, one ends of the two second arc-shaped plates are hinged to each other, and the other ends of the two second arc-shaped plates are detachably connected.

[0022] Preferably, a hinge plate is provided at one end of each of the second arc-shaped plates, and the two hinge plates are connected by a pin shaft.

[0023] Preferably, each of the second arc-shaped plates is provided with a lug plate at one end away from the hinge plate, and the two lug plates are connected by bolts.

[0024] In a second aspect, the present application further discloses a metal pipeline system, including a pipeline and a leak-proof structure of a metal pipeline flange for a high-sulfur gas field as described in the present application, wherein a flange is provided at the end of the metal pipeline, and adjacent metal pipelines are connected via the flange;

[0025] The connecting ring is sleeved on the flange, and a leak-proof rubber strip is arranged on the inner wall of the connecting ring, and the leak-proof rubber strip abuts against the connection of the flange;

[0026] The clamping ring abuts against the side surface of the flange, and the clamping mechanism is used to make the two clamping rings press the flange.

[0027] A metal pipe system described in the present application is characterized in that a connecting ring is provided at the flange connection, the flange is fixed by the connecting ring, and a leak-proof rubber strip is used to abut the connection between the two flanges, thereby forming an effective seal at the flange connection to block the gas leaking from the flange connection. The clamping rings are respectively abutted against the sides of the flanges, and the clamping mechanism is used to make the two clamping rings press the flanges, further making the two flanges fit more closely and completing the leak-proof work.

[0028] Compared with the prior art, the utility model has the following beneficial effects:

[0029] 1. The leak-proof structure of the flange of a metal pipeline in a high-sulfur gas field described in the present application comprises a connecting ring, an inner wall of which is provided with a leak-proof rubber strip, and two clamping rings arranged inside the connecting ring, the two clamping rings are arranged opposite to each other, and the two clamping rings are located on both sides of the leak-proof rubber strip, and also comprises a clamping mechanism, which can make the two clamping rings approach or move away from each other. When applied to the metal pipeline, the connecting ring is sleeved on the flange plate, and the flange plate is fixed by the connecting ring. At the same time, the leak-proof rubber strip is abutted against the connection between the two flange plates, so that the leak-proof rubber strip and the connection between the two flange plates are tightly fitted, thereby forming an effective seal at the connection between the flange plates. The seal can block the gas leaking from the flange connection. At the same time, a clamping ring is provided inside the connection ring. The two clamping rings are respectively located on both sides of the leak-proof rubber strip. When applied to a metal pipe, the clamping ring is tightly attached to the flange. The two clamping rings are brought close to each other by the clamping mechanism, so that the two clamping rings clamp the flange, making the flanges fit more closely to further improve the sealing effect. Furthermore, when maintenance or loosening is required, the two clamping rings are moved away from each other by the clamping mechanism, so that the clamping ring is easily separated from the flange, which is convenient for parts replacement without replacing the entire leak-proof tool, which not only saves costs but also improves maintenance efficiency.

[0030] 2. A metal pipe system described in the present application, by providing a connecting ring at the flange connection, fixing the flange by the connecting ring, and using a leak-proof rubber strip to abut the connection between the two flanges, thereby forming an effective seal at the flange connection to block the gas leaking from the flange connection, the clamping rings abut the sides of the flanges respectively, and the clamping mechanism is used to make the two clamping rings press the flanges, further making the two flanges fit more closely, thereby completing the leak-proof work. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram proposed by the utility model.

[0032] Figure 2 It is a schematic diagram of the connecting ring structure proposed by the utility model.

[0033] Figure 3 It is a schematic diagram of the clamping ring structure proposed by the utility model.

[0034] Figure 4 It is a semi-sectional structural diagram proposed by the utility model.

[0035] Figure 5 yes Figure 4 A partial enlarged view of point A.

[0036] Figure 6 It is a structural diagram of the card slot of the utility model.

[0037] Figure 7 It is a structural diagram of the card block of the utility model.

[0038] Markings in the figure: 1-connecting ring, 101-second arc plate, 2-slide groove, 3-slider, 4-clamping ring, 401-first arc plate, 5-clamping plate, 501-first bolt hole, 6-bidirectional threaded rod, 7-fastening nut, 8-leakage-proof rubber strip, 9-rubber pad, 10-slot, 11-block, 12-ear plate, 121-second bolt hole, 13-hinge plate, 14-flange, 15-metal pipe. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below in conjunction with specific embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0040] In the description of the specific embodiments of the present invention, unless otherwise specified, the terms indicating the orientation or position relationship such as "upper", "lower", "left", "right", "center", "inside", "outside", etc. are all expressions based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the product / equipment / device of the utility model is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the utility model or simplifying the description in the specific embodiments, so that technicians can quickly understand the scheme, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0041] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the solution of the utility model.

[0042] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0043] In addition, in the description of the embodiments of the present invention, "several", "multiple" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0044] In addition, in the description of the technical solution of the utility model, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, bolting, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0045] Example 1

[0046] like Figure 1-Figure 5 As shown, a leak-proof structure for a metal pipeline flange in a high-sulfur gas field described in this embodiment includes a connecting ring 1, and a leak-proof rubber strip 8 is arranged on the inner wall of the connecting ring 1;

[0047] It also includes two clamping rings 4 arranged inside the connecting ring 1, the two clamping rings 4 are arranged opposite to each other, and the two clamping rings 4 are respectively located on both sides of the leak-proof rubber strip 8;

[0048] It also includes a clamping mechanism, which can make the two clamping rings 4 move closer to or farther away from each other.

[0049] like Figure 1 As shown, when applied to a metal pipe 15, the connecting ring 1 is sleeved on the flange 14, and the two flanges 14 are fixed by the connecting ring 1. At the same time, the leak-proof rubber strip 8 is abutted against the connection between the two flanges 14, so that the leak-proof rubber strip 8 and the connection between the two flanges 14 are tightly fitted, as shown in FIG. Figure 4-Figure 5 , thereby forming an effective seal at the connection of the flange 14 to block the gas leaking from the connection of the flange 14. At the same time, a clamping ring 4 is provided inside the connecting ring 1, and the two clamping rings 4 are respectively located on both sides of the leak-proof rubber strip 8. When applied to the metal pipe 15, the clamping ring 4 is tightly attached to the flange 14, and the two clamping rings 4 are brought close to each other through the clamping mechanism, so that the two clamping rings 4 clamp the flange 14, so that the flanges 14 fit more closely, to further improve the sealing effect. Furthermore, when maintenance or loosening is required, the two clamping rings 4 are moved away from each other through the clamping mechanism, so that the clamping ring 4 is convenient to separate from the flange 14, which is convenient for parts replacement without replacing the entire leak-proof tool, which not only saves costs but also improves maintenance efficiency.

[0050] like Figure 2-Figure 4 As shown, the clamping mechanism includes a slide groove 2 arranged on the connecting ring 1, and the clamping mechanism also includes a slider 3 arranged on the clamping ring 4, and the slider 3 matches the slide groove 2;

[0051] A clamping plate 5 is provided at one end of the slider 3 away from the clamping ring 4 . The clamping plate 5 extends to the outside of the connecting ring 1 . Two corresponding clamping plates 5 are connected by bolts.

[0052] By arranging the slider 3 on the clamping ring 4 and the slide groove 2 on the connecting ring 1, it is convenient to install the clamping ring 4 on the connecting ring 1, so that the clamping ring 4 and the connecting ring 1 are matched together, as shown in FIG. Figure 4 Furthermore, a clamping plate 5 is provided at one end of the slider 3 away from the clamping ring 4, and the clamping plate 5 extends to the outside of the connecting ring 1. The two corresponding clamping plates 5 are bolted together. After the two clamping rings 4 are installed on the connecting ring 1, the two corresponding clamping plates 5 are bolted together, so that the two clamping rings 4 installed on the connecting ring 1 are connected to each other. In addition, due to the bolt connection, the two clamping rings 4 are controlled to move closer or farther away from each other by tightening or loosening the nuts. When the two clamping rings 4 are close to each other, the two clamping rings 4 can effectively squeeze the flange 14, so that the connection between the flanges 14 is tighter.

[0053] like Figure 6-Figure 7 As shown, a first bolt hole 501 is provided on the clamping plate 5;

[0054] like Figure 3As shown, the clamping mechanism also includes a bidirectional threaded rod 6, which passes through the first bolt hole 501 to penetrate the corresponding two clamps 5, and both ends of the bidirectional threaded rod 6 extend to the outside of the clamps 5. The ends of the bidirectional threaded rod 6 are also sleeved with fastening nuts 7, which are used to clamp the clamps 5.

[0055] By setting a first bolt hole 501 on the clamp plate 5, the bidirectional threaded rod 6 passes through the first bolt hole 501 to penetrate the corresponding two clamp plates 5, that is, the two ends of the bidirectional threaded rod 6 respectively pass through the clamp plates 5 of the two clamping rings 4. Furthermore, the ends of the bidirectional threaded rod 6 are also sleeved with a fastening nut 7, and the fastening nut 7 is used to clamp the clamp plate 5. When in use, the clamp plate 5 is clamped by the fastening nut 7, and the clamp plate 5 drives the clamping ring 4 to clamp the flange 14 after being subjected to force, thereby increasing the sealing between the flanges 14.

[0056] A preferred method is as follows Figure 6-Figure 7 As shown, the clamping ring 4 includes two first arc-shaped plates 401 , two ends of one first arc-shaped plate 401 are provided with a clamping groove 10 , two ends of the other first arc-shaped plate 401 are provided with a clamping block 11 , and the clamping groove 10 matches the clamping block 11 .

[0057] The clamping ring 4 is composed of two first arc-shaped plates 401, so that it is convenient to install the clamping ring 4 on the metal pipe 15, and a clamping groove 10 is provided at both ends of one first arc-shaped plate 401, and a clamping block 11 is provided at both ends of the other first arc-shaped plate 401. The clamping groove 10 matches the clamping block 11, so that it is convenient to assemble the two first arc-shaped plates 401 together to form the clamping ring 4, so that the clamping ring 4 is easy to install and disassemble.

[0058] In a preferred embodiment, the material of the block 11 is rubber.

[0059] A preferred method is as follows Figure 3 As shown, a rubber pad 9 is provided on one side of the first arc plate 401 close to the leak-proof rubber strip 8. The rubber pad 9 is provided to buffer the friction between the clamping ring 4 and the flange 14 to prevent the clamping force of the clamping ring 4 from being too large and crushing the flange 14.

[0060] like Figure 1 As shown, the connecting ring 1 includes two second arc-shaped plates 101 , one ends of the two second arc-shaped plates 101 are hinged to each other, and the other ends of the two second arc-shaped plates 101 are detachably connected.

[0061] By configuring the connecting ring 1 to be a structure consisting of two second arc-shaped plates 101 , it is convenient to install the connecting ring 1 on the flange 14 and to facilitate operation.

[0062] In a preferred manner, a hinge plate 13 is provided at one end of each second arc-shaped plate 101, and the two hinge plates 13 are connected by a pin shaft.

[0063] In a preferred manner, a lug plate 12 is provided at one end of each second arc-shaped plate 101 away from the hinge plate 13 , and the two lug plates 12 are connected by bolts.

[0064] Among them, Figure 1 As shown, each ear plate 12 is provided with a second bolt hole 121 , and bolts are passed through the second bolt holes 121 of the two ear plates 12 , and then the two ear plates 12 are connected together by bolt connection, thereby connecting the ends of the two second arc plates 101 away from the hinge plate 13 together.

[0065] The plugging structure of the metal pipeline flange of a high-sulfur gas field in this embodiment can effectively block the gas leaking from the connection of the flange plate 14, improve the sealing performance, prevent the leakage of harmful gases, and ensure operational safety and environmental safety. At the same time, the plugging structure is detachable as a whole. After a single part is damaged, it can be replaced without replacing the entire plugging tool.

[0066] Working principle of this embodiment: When in use, the utility model only needs to sleeve the connecting ring 1 on the flange 14, and then the connecting ring 1 can be locked by bolting the ear plate 12, so that the connection between the leak-proof rubber strip 8 and the flange 14 fits tightly. Through this arrangement, the gas leakage from the connection of the flange 14 can be blocked, and then the two clamping rings 4 can be clamped and sleeved on the metal pipe 15, and the slider 3 is inserted into the slide groove 2, and then the bidirectional threaded rod 6 can be inserted into the clamping plate 5, and the locking clamping plate 5 is clamped with the fastening nut 7 to control the clamping ring 4 to apply force to the flange 14, so that the flanges 14 fit tightly and complete the leak-proof work. A rubber pad 9 is fixedly set on the clamping ring 4, and the rubber pad 9 can buffer the friction between the clamping ring 4 and the flange 14 to prevent the clamping force of the clamping ring 4 from being too large and crushing the flange 14.

[0067] Example 2

[0068] On the basis of Example 1, Figure 1-Figure 5 As shown, a metal pipeline system described in this embodiment includes a metal pipeline 15 and a leak plugging structure of a metal pipeline flange in a high-sulfur gas field in Example 1. A flange 14 is provided at the end of the metal pipeline 15, and adjacent metal pipelines 15 are connected through the flange 14;

[0069] The connecting ring 1 is sleeved on the flange 14, and a leak-proof rubber strip 8 is provided on the inner wall of the connecting ring 1, and the leak-proof rubber strip 8 abuts against the connection of the flange 14;

[0070] The clamping ring 4 abuts against the side surface of the flange 14 , and the clamping mechanism is used to press the clamping ring 4 against the flange 14 .

[0071] By setting a connecting ring 1 at the connection of the flange 14, the flange 14 is fixed by the connecting ring 1, and a leak-proof rubber strip 8 is used to abut the connection between the two flanges 14, so as to form an effective seal at the connection of the flange 14, blocking the gas leaking from the connection of the flange 14, and the clamping rings 4 are respectively abutted against the sides of the flange 14, and the clamping mechanism is used to make the two clamping rings 4 press the flange 14, further making the two flanges 14 fit more closely, completing the leak-proof work.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A leak-proof structure for metal pipeline flanges in high-sulfur gas fields, characterized in that: It comprises a connecting ring (1), wherein a leak-proof rubber strip (8) is arranged on the inner wall of the connecting ring (1); It also comprises two clamping rings (4) arranged inside the connecting ring (1), the two clamping rings (4) being arranged opposite to each other, and the two clamping rings (4) are respectively located on both sides of the anti-leakage rubber strip (8); It also comprises a clamping mechanism, which can make the two clamping rings (4) move closer to or farther away from each other.

2. The leak-proof structure of a metal pipeline flange for a high-sulfur gas field according to claim 1 is characterized in that: The clamping mechanism comprises a slide groove (2) arranged on the connecting ring (1), and the clamping mechanism further comprises a slider (3) arranged on the clamping ring (4), wherein the slider (3) matches the slide groove (2); A clamping plate (5) is provided at one end of the slider (3) away from the clamping ring (4), and the clamping plate (5) extends to the outside of the connecting ring (1), and two corresponding clamping plates (5) are connected by bolts.

3. The leak-proof structure of a metal pipeline flange for a high-sulfur gas field according to claim 2 is characterized in that: The clamping plate (5) is provided with a first bolt hole (501); The clamping mechanism also includes a bidirectional threaded rod (6), which passes through the first bolt hole (501) to penetrate the corresponding two clamping plates (5), and both ends of the bidirectional threaded rod (6) extend to the outside of the clamping plates (5). The ends of the bidirectional threaded rod (6) are also sleeved with fastening nuts (7), and the fastening nuts (7) are used to tighten the clamping plates (5).

4. The leak-proof structure of a metal pipeline flange for a high-sulfur gas field according to claim 3 is characterized in that: The clamping ring (4) comprises two first arc-shaped plates (401), one of the first arc-shaped plates (401) having two ends provided with a clamping groove (10), and the other of the first arc-shaped plates (401) having two ends provided with a clamping block (11), and the clamping groove (10) matches the clamping block (11).

5. The leak-proof structure of a metal pipeline flange for a high-sulfur gas field according to claim 4, characterized in that: The material of the clamping block (11) is rubber.

6. The leak-proof structure of a metal pipeline flange for a high-sulfur gas field according to claim 4, characterized in that: A rubber pad (9) is provided on one side of the first arc-shaped plate (401) close to the anti-leakage rubber strip (8).

7. The leak-proof structure of a metal pipeline flange in a high-sulfur gas field according to claim 1, characterized in that: The connecting ring (1) comprises two second arc-shaped plates (101), one ends of the two second arc-shaped plates (101) are hinged to each other, and the other ends of the two second arc-shaped plates (101) are detachably connected.

8. The leak-proof structure of a metal pipeline flange in a high-sulfur gas field according to claim 7, characterized in that: A hinge plate (13) is provided at one end of each of the second arc-shaped plates (101), and the two hinge plates (13) are connected via a pin shaft.

9. The leak-proof structure of a metal pipeline flange in a high-sulfur gas field according to claim 8, characterized in that: Each of the second arc-shaped plates (101) is provided with a lug plate (12) at one end away from the hinge plate (13), and the two lug plates (12) are connected by bolts.

10. A metal piping system, characterized in that: A leak-proof structure comprising a metal pipe (15) and a metal pipe flange for a high-sulfur gas field as claimed in any one of claims 1 to 9, wherein a flange (14) is provided at the end of the metal pipe (15), and adjacent metal pipes (15) are connected via the flange (14); The connecting ring (1) is sleeved on the flange (14), and a leak-proof rubber strip (8) is provided on the inner wall of the connecting ring (1), and the leak-proof rubber strip (8) abuts against the connection of the flange (14); The clamping ring (4) abuts against the side surface of the flange (14), and the clamping mechanism is used to enable the clamping ring (4) to press the flange (14).

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