A flange plugging device

Abstract

This utility model belongs to the field of pipeline flange leakage sealing technology, specifically relating to a flange leakage sealing device. This flange leakage sealing device includes a leakage sealing clamp and a sealing mechanism. The leakage sealing clamp includes two sealing sleeves, each including a sealing outer shell that seals against the outer circumferential surface of the flange joint and a sealing rubber block protruding outward from the inner circumferential surface of the sealing outer shell. The end of the sealing rubber block can be embedded into the flange gap. The sealing mechanism includes two glue injection components, each including two glue injection grooves located on both sides of the sealing rubber block and a glue injection component on the sealing outer shell communicating with the two glue injection grooves. In use, the two sealing rubber blocks are embedded into the opposing flange gaps to form a first sealing part. Then, glue is filled into the two glue injection grooves through the glue injection component, filling both sealing cavities. This results in the glue in the sealing cavities filling the connection between the sealing rubber block and the flange gap, forming a second sealing part, creating a double sealing effect, better sealing the flange gap, and effectively preventing pipeline leakage.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline flange leakage sealing technology, specifically relating to a flange leakage sealing device. Background Technology

[0002] A flange is a connecting device between pipes. When in use, the flange is directly connected between the pipes, and a sealing gasket is added at the flange connection to ensure the sealing of the connection.

[0003] Over time, gaskets may fail due to various external factors, leading to leakage. Existing flange sealing devices are designed and manufactured with flange clamps equipped with adhesive injection channels based on on-site survey data. These clamps are installed on the outside of the leaking flange and adhesive is injected to maintain internal and external pressure balance, thus achieving a seal repair.

[0004] However, in actual operation, there are some problems. Due to the limited space, as the sealant is injected, internal pressure will be generated, which makes it easy for the sealant to overflow from between the flange clamp and the flange, resulting in poor sealing effect. Furthermore, when repairing the leakage between the flanges, as the internal pressure increases, the pressure will be transmitted to the bolts used to connect the two flanges, causing the bolts to be stressed. When the stress is too great, there is a risk of bolt breakage, which is highly dangerous and has low structural reliability. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a flange sealing device with high safety and good sealing performance.

[0006] The present invention adopts the following technical solution:

[0007] A flange sealing device is detachably sleeved on the outside of a flange joint for connecting two pipes. The flange joint includes two flanges respectively disposed at the ends of the two pipes and bolts connecting the two flanges. A flange gap is formed between the two flanges, which is opposite to the connection point of the two pipes. The device is characterized by including a sealing clamp and a sealing mechanism.

[0008] The leak-sealing clamp includes two sealing sleeves that are spliced ​​together in a ring, a locking assembly disposed between the two sealing sleeves, and a positioning assembly disposed on the sealing sleeves that mates with both sides of the flange joint. The sealing sleeve includes a sealing shell that is sealed to the outer circumferential surface of the flange joint and a sealing rubber block that protrudes outward from the inner circumferential surface of the sealing shell. The end of the sealing rubber block can be embedded in the flange gap.

[0009] The sealing mechanism includes two glue injection assemblies respectively disposed on two sealing sleeves. Each glue injection assembly includes two glue injection grooves extending inward from the inner circumference of the sealing shell and located on both sides of the sealing rubber block, and a glue injection component disposed on the sealing shell and communicating with the two glue injection grooves. When the sealing sleeve is installed outside the flange joint, the glue injection grooves form a sealing cavity with the outer circumference of the opposite flange and the side of the sealing rubber block. Glue can be filled into the sealing cavity through the glue injection component.

[0010] Furthermore, multiple glue-injecting components are provided, and the multiple glue-injecting components are spaced apart along the outer periphery of the sealing sleeve. Each glue-injecting component includes two glue-injecting channels extending inward from the outer periphery of the sealing shell and communicating with the two glue-injecting grooves, and two glue-injecting connectors respectively connected to the two glue-injecting channels.

[0011] Furthermore, multiple positioning components are provided, and the multiple positioning components are spaced apart along the outer periphery of the sealed housing.

[0012] Furthermore, the positioning assembly includes a mounting groove formed on the outer peripheral surface of the sealing housing, two positioning plates disposed opposite to each other on the left and right sides of the mounting groove and respectively contacting and abutting against the two sides of the flange joint, and a positioning element disposed between the side of the sealing housing and the opposite positioning plates.

[0013] Furthermore, the positioning plate includes a movable section movably disposed within the mounting groove and an abutment section extending downward vertically on the movable section, one side of the abutment section contacting and abutting against one of the flange sides.

[0014] Furthermore, the positioning element includes a positioning hole provided on the abutment section, a positioning groove provided on the sealing shell opposite to the positioning hole, and a positioning bolt passing through the positioning hole and engaging with the positioning groove.

[0015] Furthermore, the inner circumferential surface of the sealing housing is provided with a connecting groove for connecting with the sealing rubber block. The sealing rubber block includes a connecting section that can be embedded in the connecting groove and a pointed section provided at the end of the connecting section that can be embedded in the flange gap.

[0016] Furthermore, the sealing sleeve also includes two sealing structures disposed on the inner circumferential surface of the sealing housing and respectively sealingly connected to the outer circumferential surfaces of the two flanges. The sealing structure includes a sealing strip disposed on the inner side of the sealing housing and cooperating with the outer circumferential surface of the opposite flange, and two serrated portions formed on the inner side of the sealing housing and contacting and abutting the outer circumferential surfaces of the two flanges. The two sealing strips are respectively disposed on the two serrated portions and located at the middle position of the opposite serrated portions.

[0017] Furthermore, the serrated portion includes a sealing groove extending inward from the inner circumferential surface of the sealing housing for installing a sealing strip, and a plurality of pointed protrusions formed on both sides of the sealing groove and arranged sequentially along the width direction of the inner circumferential surface of the sealing housing.

[0018] Furthermore, the sealing sleeve is semi-circular in shape, and the sealing sleeve also includes two fixing plates extending outward from both ends of the sealing shell and fixing holes provided on the fixing plates. When the two sealing sleeves are spliced ​​and fitted onto the outer circumference of the flange joint, the two fixing plates of the two sealing shells correspond one to one, and the locking assembly fixes the two sealing sleeves together through the fixing holes on the two opposing fixing plates.

[0019] As can be seen from the above description of this utility model, compared with the prior art, the beneficial effects of this utility model are as follows: This application defines the specific structure of the flange sealing device, so that the sealing clamp cooperates with the two sealing sleeves arranged in a ring and the two glue injection components respectively set on the two sealing sleeves. In use, the two sealing sleeves are respectively installed on the outer periphery of the flange joint, and the two sealing rubber blocks are embedded in the opposite flange gap to form a first sealing part, so that the sealing rubber blocks contact and abut with the flange gap, thereby sealing the flange gap. Then, glue is filled into the two glue injection grooves through the glue injection component to fill the two sealing cavities, so that the glue in the sealing cavity fills the connection between the sealing rubber block and the flange gap. This glue forms a second sealing part. When the flange gap is blocked by the sealing rubber block, glue is provided at each position of the glue injection groove, the outer peripheral surface of the flange, and the sealing rubber block, forming a double sealing effect, better sealing the flange gap, and effectively preventing pipeline leakage; and the two sealing cavities formed between the two glue injection grooves and the two flanges are located outside the flange gap, so the glue is not easy to flow into the flange gap, which can prevent the bolts connecting the two flanges from breaking and improve the safety of the flange sealing device.

[0020] By the mutual cooperation of the mounting groove formed on the outer circumference of the sealing shell, the two positioning plates arranged opposite each other on the left and right sides of the mounting groove, and the positioning element arranged between the side of the sealing shell and the opposite positioning plate, the sealing sleeve can be positioned laterally, so that the sealing sleeve is fixedly installed in the middle position of the flange joint, while restricting the movement of the sealing sleeve on the flange joint and improving the stability of the sealing sleeve; at the same time, the distance between the two positioning plates can be adjusted according to the thickness of the flange joint, so that the two positioning plates are always in contact with and abutting the sides of the flange joint, improving the practicality of the flange sealing device.

[0021] By using a sealing strip located inside the sealing housing that mates with the outer circumferential surface of the opposing flange, and two serrated portions formed inside the sealing housing that abut against the outer circumferential surfaces of the two flanges, when the two sealing sleeves are respectively installed on the outer circumference of the flange joint, the two sealing strips and two serrated portions on the sealing sleeves abut against the outer circumferential surfaces of the two flanges respectively. The sealing strips and serrated portions are compressed and deformed, making tight contact with the outer circumferential surfaces of the opposing flanges, thus improving the sealing performance between the sealing sleeve and the outer circumference of the flange joint. At the same time, by defining the specific structure of the serrated portions, and by setting a sealing groove that mates with the sealing strip and a plurality of pointed protrusions arranged sequentially on both sides of the sealing groove, the plurality of pointed protrusions and the sealing strip form a third sealing portion, thereby preventing glue from seeping out of the sealing sleeve and the flange joint. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the flange sealing device in its mating state with the flange connector.

[0023] Figure 2 This is a schematic diagram of a flange sealing device.

[0024] Figure 3 A partial structural breakdown diagram of the sealing sleeve. Figure 1 .

[0025] Figure 4 A partial structural breakdown diagram of the sealing sleeve. Figure 2 .

[0026] Figure 5 for Figure 4 An enlarged schematic diagram of the structure at point A in the middle.

[0027] Figure 6 This is a schematic diagram of the internal structure of the flange sealing device in its mating state with the flange connector.

[0028] Figure 7 for Figure 6 Enlarged schematic diagram of the structure at point B.

[0029] In the diagram: 1. Flange joint; 11. Flange; 12. Bolt; 13. Flange clearance; 2. Leak-sealing clamp; 21. Sealing sleeve; 22. Locking assembly; 23. Positioning assembly; 231. Mounting groove; 232. Positioning plate; 233. Positioning element; 234. Moving section; 235. Abutment section; 236. Positioning hole; 237. Positioning groove; 238. Positioning bolt; 24. Sealing shell; 241. Connecting groove; 25. Sealing rubber block; 251. Connecting section; 252. Pointed section; 26. Sealing structure; 261. Sealing strip; 262. Serrated part; 263. Sealing groove; 264. Pointed protrusion; 27. Fixing plate; 28. Fixing hole; 3. Sealing mechanism; 31. Glue injection assembly; 32. Glue injection groove; 33. Glue injection element; 34. Sealing cavity; 35. Glue injection channel; 36. Glue injection joint. Detailed Implementation

[0030] The present invention will be further described below through specific embodiments.

[0031] like Figures 1 to 7 As shown, this embodiment provides a flange sealing device that can be detachably sleeved on the outside of the flange joint 1, including a sealing clamp 2 and a sealing mechanism 3.

[0032] Flange joint 1, used to connect two pipes, includes two flanges 11 respectively disposed at the ends of the two pipes and bolts 12 connected between the two flanges 11, and a flange gap 13 is formed between the two flanges 11 opposite to the connection point of the two pipes.

[0033] The leak-sealing clamp 2 includes two sealing sleeves 21 arranged in a ring, a locking assembly 22 disposed between the two sealing sleeves 21, and a positioning assembly 23 disposed on the sealing sleeves 21 and cooperating with both sides of the flange joint 1. The sealing sleeves 21 are semi-circular and include a sealing outer shell 24 that seals against the outer circumferential surface of the flange joint 1, and a sealing rubber block 25 protruding outward from the inner circumferential surface of the sealing outer shell 24. The end of the sealing rubber block 25 can be embedded in the flange gap 13. In use, the two sealing sleeves 21 are respectively installed on the outer circumference of the flange joint 1, and the two sealing rubber blocks 25 are embedded in the corresponding flange gaps 13, thereby forming a first sealing part, so that the sealing rubber blocks 25 contact the flange gaps 13. The sealing housing 24 has a connecting groove 241 on its inner circumferential surface that connects to the sealing rubber block 25. The sealing rubber block 25 includes a connecting section 251 that can be embedded in the connecting groove 241 and a pointed section 252 at the end of the connecting section 251 that can be embedded in the flange gap 13. In use, the pointed section 252 is squeezed into the flange gap 13, and the two sides of the pointed section 252 are squeezed by the two flanges 11 respectively, so that the pointed section 252 and the flange joint 1 form an interference fit, effectively sealing the flange gap 13 and improving the sealing effect between the sealing rubber block 25 and the relative flange gap 13. Furthermore, the sealing sleeve 21 also includes a connecting groove 241 on the inner circumferential surface of the sealing housing 24 that connects to the sealing rubber block 25. The two sealing structures 26 are connected to the outer circumferential surfaces of the two flanges 11. Each sealing structure 26 includes a sealing strip 261 disposed inside the sealing housing 24 and mating with the outer circumferential surface of the opposing flange 11, and two serrated portions 262 formed inside the sealing housing 24 and contacting and abutting the outer circumferential surfaces of the two flanges 11. The two sealing strips 261 are respectively disposed on the two serrated portions 262, located at the middle position of the opposing serrated portions 262. When the two sealing sleeves 21 are respectively installed on the outer circumference of the flange joint 1, the two sealing strips 261 and the two serrated portions 262 on the sealing sleeves 21 contact and abut with the outer circumferential surfaces of the two flanges 11. The sealing strips 261 and the serrated portions 262 are compressed and deformed, making tight contact with the outer circumferential surfaces of the opposing flanges 11, thus improving the sealing sleeve... The sealing sleeve 21 is sealed to the outer periphery of the flange joint 1. Furthermore, the sealing sleeve 21 also includes two fixing plates 27 extending outward from both ends of the sealing shell 24 and fixing holes 28 provided on the fixing plates 27. When the two sealing sleeves 21 are spliced ​​and fitted onto the outer periphery of the flange joint 1, the two fixing plates 27 of the two sealing shells 24 correspond one to one. The locking assembly 22 fixes the two sealing sleeves 21 together through the fixing holes 28 on the two opposing fixing plates 27. Through the cooperation between the locking assembly 22 and the fixing plates 27 and the fixing holes 28, it is convenient to install and disassemble the leak-stopping clamp 2. The locking assembly 22 is a bolt and nut connection assembly that can achieve detachable connection in the prior art. Its specific structure will not be described in detail here.

[0034] Multiple positioning components 23 are provided, spaced apart along the outer periphery of the sealing shell 24. Each positioning component 23 includes a mounting groove 231 formed on the outer periphery of the sealing shell 24, two positioning plates 232 respectively positioned on the left and right sides of the mounting groove 231 and contacting the sides of the flange joint 1, and a positioning element 233 positioned between the side of the sealing sleeve 21 and the opposing positioning plates 232. Through the cooperation between the mounting groove 231, the two positioning plates 232, and the positioning element 233, the sealing sleeve 21 can be laterally positioned, fixing it in the middle position of the flange joint 1, while restricting its movement on the flange joint 1, thus improving the stability of the sealing sleeve 21. At the same time, the distance between the two positioning plates 232 can be adjusted according to the thickness of the flange joint 1 so that the two positioning plates 232 are always in contact with both sides of the flange joint 1, thereby improving the practicality of the flange sealing device. Specifically, the positioning plate 232 includes a movable section 234 that is movably disposed in the mounting groove 231 and an abutment section 235 that is vertically disposed on the movable section 234 and extends downward, with one side of the abutment section 235 contacting and abutting the side of one of the flanges 11. Further, the positioning element 233 includes a positioning hole 236 disposed on the abutment section 235, a positioning groove 237 disposed on the sealing shell 24 opposite to the positioning hole 236, and a positioning bolt 238 that passes through the positioning hole 236 and engages with the positioning groove 237.

[0035] The sealing mechanism 3 includes two glue injection assemblies 31 respectively disposed on two sealing sleeves 21. Each glue injection assembly 31 includes two glue injection grooves 32 extending inward from the inner circumference of the sealing housing 24 and located on both sides of the sealing rubber block 25, and a glue injection element 33 disposed on the sealing housing 24 and communicating with the two glue injection grooves 32. When the sealing sleeves 21 are installed outside the flange joint 1, the glue injection grooves 32, the outer circumference of the opposite flange 11, and the side surface of the sealing rubber block 25 form a sealing cavity 34. Glue can be filled into the sealing cavity 34 through the glue injection element 33. Specifically, in use, the two glue injection grooves 32 respectively communicate with the two sealing sleeves 21. With the outer circumferential surfaces of flanges 11 facing each other, glue is filled into the two glue injection grooves 32 through the glue injection component 33, filling the two sealing cavities 34. This ensures that the glue in the sealing cavities 34 fills the connection between the sealing rubber block 25 and the flange gap 13, forming a second sealing part. When the flange gap 13 is blocked by the sealing rubber block 25, glue is provided at every position between the glue injection groove 32, the outer circumferential surface of flange 11, and the sealing rubber block 25, forming a double sealing effect, better sealing the flange gap 13, and effectively preventing pipeline leakage. Furthermore, the glue injection component 33 includes a sealant from the outer casing. The sealing housing 24 has two inwardly extending glue channels 35 communicating with the two glue injection grooves 32, and two glue injection connectors 36 respectively connected to the two glue injection channels 35; wherein, the serrated part 262 includes a sealing groove 263 extending inwardly from the inner circumference of the sealing housing 24 for installing the sealing strip 261, and a plurality of pointed protrusions 264 formed on both sides of the sealing groove 263 and arranged sequentially along the width direction of the inner circumference of the sealing housing 24, so that a third sealing part is formed between the plurality of pointed protrusions 264, the sealing strip 261 and the outer circumference of the flange, thereby preventing the sealing cavity 34 from being sealed. Glue overflow; during use, the glue injection equipment injects glue into the glue injection tank 32 through the glue injection joint 36. When the glue flows into the sealing cavity 34, the sealing strip 261 and the serrated part 262 contact and abut against the outer peripheral surface of the opposite flange 11. The glue in the sealing cavity 34 needs to pass through multiple pointed protrusions 264 on one side, the sealing strip 261 and multiple pointed protrusions 264 on the other side in sequence before it overflows to the outside of the sealing sleeve 21 and the flange joint 1, effectively preventing glue overflow; furthermore, multiple glue injection parts 33 are provided, and multiple glue injection parts 33 are spaced apart along the outer peripheral direction of the sealing sleeve 21.

[0036] In summary, through the mutual cooperation between the two sealing sleeves 21 arranged in a ring and the two glue injection components 31 respectively disposed on the two sealing sleeves 21, the two sealing rubber blocks 25 on the two sealing sleeves 21 can be embedded in the opposite flange gap 13 to form a first sealing part. The glue injection component 33 fills glue into the two glue injection grooves 32 respectively, filling the two sealing cavities 34, so that the glue in the sealing cavity 34 fills the connection between the sealing rubber block 25 and the flange gap 13, and the glue forms a second sealing part. When the flange gap 13 is blocked by the sealing rubber block 25, the glue injection groove 32, the outer peripheral surface of the flange 11 and Adhesive is applied at each position between the sealing rubber blocks 25, forming a double seal to better seal the flange gap 13 and effectively prevent pipeline leakage. Furthermore, the two sealing cavities 34 formed between the two adhesive injection grooves 32 and the two flanges 11 are located outside the flange gap 13, preventing adhesive from flowing into the flange gap 13 and thus preventing the bolts 12 connecting the two flanges 11 from breaking, improving the safety of the flange sealing device. Additionally, the installation groove 231 formed on the outer circumference of the sealing housing 24, the two positioning plates 232 positioned opposite each other on the left and right sides of the installation groove 231, and the plates positioned on the sides of the sealing housing 24 further enhance the sealing effect. The mutual cooperation between the positioning elements 233 and the relative positioning plates 232 can provide lateral positioning for the sealing sleeve 21, fixing the sealing sleeve 21 in the middle position of the flange joint 1 and restricting its movement on the flange joint 1, thereby improving the stability of the sealing sleeve 21. The distance between the two positioning plates 232 can be adjusted according to the thickness of the flange joint 1, ensuring that the two positioning plates 232 are always in contact with both sides of the flange joint 1, improving the practicality of the flange sealing device. Furthermore, the tight seal provided inside the sealing shell 24 and cooperating with the outer circumferential surface of the relative flange 11... The mutual cooperation between the seal 261 and the two serrated portions 262 formed inside the sealing housing 24 and contacting the outer peripheral surfaces of the two flanges 11 improves the sealing performance between the sealing sleeve 21 and the outer peripheral surface of the flange joint 1. In addition, by defining the specific structure of the serrated portions 262, the mutual cooperation between the sealing groove 263 that cooperates with the sealing strip 261 and the multiple pointed protrusions 264 arranged sequentially on both sides of the sealing groove 263 forms a third sealing part between the multiple pointed protrusions 264, the sealing strip 261 and the outer peripheral surface of the flange 11, thereby preventing glue from seeping out of the sealing sleeve 21 and the flange joint 1.

[0037] The above description is merely a preferred embodiment of the present utility model, and therefore cannot be construed as limiting the scope of the present utility model. All equivalent changes and modifications made in accordance with the scope of the present utility model application and the contents of the specification should still fall within the scope of the present utility model application.

Claims

1. A flange sealing device, detachably sleeved on the outside of a flange joint, the flange joint being used to connect two pipes, comprising two flanges respectively disposed at the ends of the two pipes and bolts connecting the two flanges, wherein a flange gap is formed between the two flanges corresponding to the connection point of the two pipes, characterized in that: Includes leak-sealing clamps and sealing mechanisms; The leak-sealing clamp includes two sealing sleeves that are spliced ​​together in a ring, a locking assembly disposed between the two sealing sleeves, and a positioning assembly disposed on the sealing sleeves that mates with both sides of the flange joint. The sealing sleeve includes a sealing shell that is sealed to the outer circumferential surface of the flange joint and a sealing rubber block that protrudes outward from the inner circumferential surface of the sealing shell. The end of the sealing rubber block can be embedded in the flange gap. The sealing mechanism includes two glue injection assemblies respectively disposed on two sealing sleeves. Each glue injection assembly includes two glue injection grooves extending inward from the inner circumference of the sealing shell and located on both sides of the sealing rubber block, and a glue injection component disposed on the sealing shell and communicating with the two glue injection grooves. When the sealing sleeve is installed outside the flange joint, the glue injection grooves form a sealing cavity with the outer circumference of the opposite flange and the side of the sealing rubber block. Glue can be filled into the sealing cavity through the glue injection component.

2. The flange sealing device according to claim 1, characterized in that: The adhesive injection component is provided in multiple ways, and the multiple adhesive injection components are spaced apart along the outer periphery of the sealing sleeve. Each adhesive injection component includes two adhesive injection channels extending inward from the outer periphery of the sealing shell and communicating with two adhesive injection grooves, and two adhesive injection connectors respectively connected to the two adhesive injection channels.

3. The flange sealing device according to claim 1, characterized in that: Multiple positioning components are provided, and the multiple positioning components are spaced apart along the outer periphery of the sealed shell.

4. A flange sealing device according to claim 3, characterized in that: The positioning assembly includes a mounting groove formed on the outer peripheral surface of the sealing shell, two positioning plates disposed opposite to each other on the left and right sides of the mounting groove and respectively contacting and abutting the two sides of the flange joint, and a positioning element disposed between the side of the sealing shell and the opposite positioning plates.

5. A flange sealing device according to claim 4, characterized in that: The positioning plate includes a movable section movably disposed in the mounting groove and an abutment section extending downward vertically on the movable section, one side of the abutment section contacting and abutting against one of the flange sides.

6. A flange sealing device according to claim 5, characterized in that: The positioning element includes a positioning hole on the abutment section, a positioning groove on the sealing shell opposite to the positioning hole, and a positioning bolt that passes through the positioning hole and engages with the positioning groove.

7. A flange sealing device according to claim 1, characterized in that: The inner circumferential surface of the sealing housing is provided with a connecting groove for connecting with the sealing rubber block. The sealing rubber block includes a connecting section that can be embedded in the connecting groove and a pointed section provided at the end of the connecting section that can be embedded in the flange gap.

8. A flange sealing device according to claim 1, characterized in that: The sealing sleeve also includes two sealing structures disposed on the inner circumferential surface of the sealing housing and respectively sealingly connected to the outer circumferential surfaces of the two flanges. The sealing structure includes a sealing strip disposed on the inner side of the sealing housing and cooperating with the outer circumferential surface of the opposite flange, and two serrated portions formed on the inner side of the sealing housing and contacting and abutting the outer circumferential surfaces of the two flanges. The two sealing strips are respectively disposed on the two serrated portions and located at the middle position of the opposite serrated portions.

9. A flange sealing device according to claim 8, characterized in that: The serrated portion includes a sealing groove extending inward from the inner circumference of the sealing housing for installing a sealing strip, and a plurality of pointed protrusions formed on both sides of the sealing groove and arranged sequentially along the width direction of the inner circumference of the sealing housing.

10. A flange sealing device according to claim 1, characterized in that: The sealing sleeve is semi-circular in shape. The sealing sleeve also includes two fixing plates extending outward from both ends of the sealing shell and fixing holes on the fixing plates. When the two sealing sleeves are spliced ​​and fitted onto the outer circumference of the flange joint, the two fixing plates of the two sealing shells correspond one to one. The locking assembly fixes the two sealing sleeves together through the fixing holes on the two opposite fixing plates.

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