CN218954286U - Positive pressure-resistant plastic composite pipe sleeve type flange connection device - Google Patents
Positive pressure-resistant plastic composite pipe sleeve type flange connection device Download PDFInfo
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- CN218954286U CN218954286U CN202223297628.1U CN202223297628U CN218954286U CN 218954286 U CN218954286 U CN 218954286U CN 202223297628 U CN202223297628 U CN 202223297628U CN 218954286 U CN218954286 U CN 218954286U
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- 229920003023 plastic Polymers 0.000 title claims abstract description 27
- 239000004033 plastic Substances 0.000 title claims abstract description 27
- 239000002131 composite material Substances 0.000 title claims abstract description 24
- 238000007789 sealing Methods 0.000 claims abstract description 107
- 239000002184 metal Substances 0.000 description 6
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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- Flanged Joints, Insulating Joints, And Other Joints (AREA)
Abstract
The utility model relates to a positive pressure-resistant plastic composite pipe sleeve type flange connecting device, which belongs to the technical field of pipeline connection and particularly comprises connecting pipes and connecting flanges for connecting the two connecting pipes, wherein annular protrusions are arranged on the connecting pipes, connecting sleeves are arranged outside the annular protrusions, one end of each connecting sleeve is provided with a baffle, the other end of each connecting sleeve is provided with a connecting flange, the end faces of the connecting pipes are provided with grooves, the grooves are provided with first annular sealing grooves, annular sealing rings with triangular sections are arranged in the grooves of the two connecting pipes, first annular sealing protrusions are further arranged on two sides of each annular sealing ring, the first annular sealing protrusions are inserted in the first annular sealing grooves, and annular sealing gaskets are further arranged on the annular sealing rings and are arranged between the two connecting pipes.
Description
Technical Field
The utility model relates to a sleeve type flange connection device for a positive pressure-resistant plastic composite pipe, and belongs to the technical field of pipeline connection.
Background
The pipeline system can be divided into a non-pressure pipe, an external pressure pipe (also called a negative pressure pipe) and a positive pressure pipe according to the state of bearing pressure in the pipeline system during operation. The reliability of the joint connection for positive pressure piping determines the safety and stability of the overall piping system operation.
At present, common connection modes of metal pipelines include welding connection, screw connection, flange connection and clamp connection. The plastic solid wall pipe is usually welded and flange connected. The plastic composite pipe is in a multi-layer structure, and metal or inorganic fiber materials are generally adopted as reinforcing layers to be composited between the inner layer and the outer layer of the pipe wall, so that the conventional butt welding process cannot be adopted for the composite pipe.
Most of the existing plastic composite pipes are connected by adopting metal buckling joints and electric melting socket and spigot flanges, and the metal buckling flange joints are not made of metal, so that the plastic composite pipes are easy to corrode after contacting conveying media, and the plastic composite pipes become short plates in a plastic composite pipeline system. In order to solve the problem of systematic corrosion resistance, more and more attempts are made to adopt plastic electric melting flange connection, in order to improve the compressive strength of the electric melting flange, a reinforcing framework can be arranged in the electric melting flange, but a pipe joint fastened by bolts is made of plastic material in essence in the pipeline connection process, the plastic flange can creep under the condition that the pipeline is internally subjected to higher working pressure, the leakage phenomenon occurs at the connecting end face along with the time, the reliable operation in a long-term high-pressure state cannot be met, and hidden dangers are buried in the safe and stable operation of the whole pipeline system.
Besides, the electric melting flange of the plastic composite pipe is connected with the Harvard clamp joint, but experiments and field application find that the positioning of the sealing rubber ring for the Harvard clamp joint operation is very difficult to operate, the sealing rubber ring is easy to misplace, and certain hidden danger is caused to the sealing quality of the pipeline joint.
Disclosure of Invention
In order to solve the technical problems in the prior art, the utility model provides the positive pressure-resistant plastic composite pipe sleeve type flange connecting device which is reliable in connection, adopts a multi-channel sealing structure and can ensure that the plastic composite pipe sleeve type flange connecting device can not leak during long-time operation.
In order to achieve the above purpose, the technical scheme adopted by the utility model is that the positive pressure-resistant plastic composite pipe sleeve type flange connecting device comprises connecting pipes and connecting flanges used for connecting the two connecting pipes, annular protrusions are arranged on the connecting pipes, connecting sleeves are arranged outside the annular protrusions, a baffle is arranged at one end of each connecting sleeve, the connecting flanges are arranged at the other end of each connecting sleeve, grooves are formed in the end faces of the connecting pipes, first annular sealing grooves are formed in the grooves, annular sealing rings with triangular sections are arranged in the grooves of the two connecting pipes, first annular sealing protrusions are further arranged on two sides of each annular sealing ring, the first annular sealing protrusions are inserted into the first annular sealing grooves, annular sealing gaskets are further arranged on the annular sealing rings, and the annular sealing gaskets are arranged between the two connecting pipes.
Preferably, the sealing sleeve is installed at the end of the connecting pipe, the sealing sleeve is connected with the connecting pipe through sealing threads, an annular sealing stop block is arranged at the end of the sealing sleeve, a plurality of meshed second sealing bulges and second sealing grooves are arranged on the contact surface of the two annular sealing stop blocks, a sealing groove is formed in the connecting flange, and the annular sealing stop blocks are located in the sealing groove.
Preferably, the cross section of the annular sealing stop block is a right trapezoid, the inclined plane of the right trapezoid is in contact with the closed groove, and the cross section of the closed groove is a right trapezoid corresponding to the inclined plane of the right trapezoid.
Preferably, the two annular sealing stop blocks are further provided with positioning grooves, the outer parts of the annular sealing rings are further provided with annular positioning plates, and the annular positioning plates are positioned in the positioning grooves.
Compared with the prior art, the utility model has the following technical effects: according to the characteristics that the plastic composite pipe is high in bearing strength, the existing metal pipe joint is not corrosion-resistant, and the plastic pipe joint is low in bearing strength, the connecting pipe fitting matched with the plastic composite pipe and the connecting mode are optimally designed, the full-surrounding sleeve type flange structure is provided as the connecting pipe fitting of the plastic composite pipe, the annular sealing ring and the annular sealing gasket are arranged on the contact surface of the plastic composite pipe, the annular sealing ring and the first annular sealing gaskets arranged on the two sides are utilized to bulge to bear pressure, the situation that the annular sealing gasket is stressed and deformed to leak is avoided, meanwhile, the outer part of the connecting pipe is tightly sealed by the extrusion pressure of the connecting flange through the annular sealing stop block and the sealing sleeve, so that the second seal is formed, the sealing reliability is ensured, the installation is simple, the connecting operation is more labor-saving, and the sealing is more reliable.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a partial enlarged view at a in fig. 1.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
As shown in fig. 1 and 2, the positive pressure-resistant plastic composite pipe sleeve type flange connection device comprises a connecting pipe 1 and a connecting flange 2 for connecting two connecting pipes, wherein an annular bulge 3 is arranged on the connecting pipe 1, a connecting sleeve 4 is arranged outside the annular bulge 3, a baffle 5 is arranged at one end of the connecting sleeve 4, the connecting flange 2 is arranged at the other end of the connecting sleeve, a groove 6 is arranged on the end face of the connecting pipe 1, a first annular sealing groove 7 is formed in the groove 6, annular sealing rings 8 with triangular sections are arranged in the grooves of the two connecting pipes 1, first annular sealing bulges 9 are further arranged on two sides of the annular sealing rings 8, the first annular sealing bulges 9 are inserted in the first annular sealing grooves 7, annular sealing gaskets 10 are further arranged on the annular sealing rings 8, and the annular sealing gaskets 10 are arranged between the two connecting pipes 1.
In the utility model, the annular bulge is arranged outside the connecting pipe, the connecting sleeve is arranged by using the annular bulge, one end of the connecting sleeve is clamped on the annular bulge through the baffle, and the connecting flange is arranged at the other end of the connecting sleeve. The connecting pipe is fixedly fixed in the groove when being clamped, and first annular sealing bulges are respectively arranged on two sides of the annular sealing ring and are inserted into the first annular sealing grooves. Therefore, most pipeline pressure can be buffered by utilizing the annular sealing ring and the first annular sealing bulge, and further, the stress deformation of the annular sealing gasket is reduced, so that the sealing effect is ensured.
The end part of the connecting pipe 1 is provided with a sealing sleeve 11, the sealing sleeve 11 is connected with the connecting pipe 1 through sealing threads, the end part of the sealing sleeve 11 is provided with an annular sealing stop block 12, the contact surface of the two annular sealing stop blocks 12 is provided with a plurality of meshed second sealing bulges 13 and second sealing grooves 14, the inside of the two connecting flanges 2 is provided with a sealing groove 15, and the annular sealing stop blocks 12 are positioned in the sealing groove 15. The connecting pipe is sealed through annular sealing ring, annular sealing pad, and the outside still sets up the second and seals, through at the outside installation seal sleeve pipe and the annular seal dog of connecting pipe, seal sleeve pipe passes through sealed screw thread to be installed on the connecting pipe, meshes through second seal protruding 13 and second seal groove 14 between the annular seal dog. Meanwhile, the cross section of the annular sealing stop block 15 is a right trapezoid, the inclined plane of the right trapezoid is in contact with the closed groove, and the cross section of the closed groove 15 is a right trapezoid corresponding to the inclined plane of the right trapezoid. Therefore, after the connecting flange is pre-tightened, the annular sealing stop block realizes clamping sealing under the action of the wall of the sealing groove, and further improves the sealing reliability.
In addition, the two annular sealing stop blocks 12 are further provided with positioning grooves 16, an annular positioning plate 17 is further arranged outside the annular sealing ring 8, and the annular positioning plate 17 is located in the positioning grooves 16. The annular locating plate is mainly used for installing and locating the annular sealing ring and the annular sealing gasket, and the reliable installation and locating of the sealing gasket is ensured.
Through carrying out pressure resistance test on the composite pipe which is designed by the scheme and is connected with the sleeve-type flange in a full-surrounding way, the connecting pipe fitting can bear the same pressure as the pipe body, no leakage is generated under the pressure condition of 12.0MPa, the end face of the protruding face flange is used for compressing and sealing the connecting mode, and leakage starts when the hydrostatic pressure reaches 8.0MPa, so that the pressure cannot be increased continuously.
The foregoing description of the preferred embodiment of the utility model is not intended to be limiting, but rather to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (4)
1. The utility model provides a resistant positive pressure plastics composite pipe sleeve formula flange joint device, includes the connecting pipe and is used for connecting the flange of two connecting pipes, its characterized in that: the connecting pipe is provided with annular protrusions, the connecting sleeve is arranged on the outer portion of the annular protrusions, the baffle is arranged at one end of the connecting sleeve, the connecting flange is arranged at the other end of the connecting sleeve, a groove is arranged on the end face of the connecting pipe, a first annular sealing groove is formed in the groove, two annular sealing rings with triangular cross sections are arranged in the groove of the connecting pipe, first annular sealing protrusions are further arranged on two sides of the annular sealing rings, the first annular sealing protrusions are inserted into the first annular sealing grooves, annular sealing gaskets are further arranged on the annular sealing rings, and the annular sealing gaskets are arranged between the two connecting pipes.
2. The positive pressure resistant plastic composite pipe sleeve type flange connection device according to claim 1, wherein: the end part of the connecting pipe is provided with a sealing sleeve, the sealing sleeve is connected with the connecting pipe through sealing threads, the end part of the sealing sleeve is provided with an annular sealing stop block, a plurality of meshed second sealing bulges and second sealing grooves are arranged on the contact surface of the two annular sealing stop blocks, the inside of the connecting flange is provided with a sealing groove, and the annular sealing stop blocks are positioned in the sealing groove.
3. The positive pressure resistant plastic composite pipe sleeve type flange connection device according to claim 2, wherein: the cross section of the annular sealing stop block is a right trapezoid, the inclined plane of the right trapezoid is in contact with the closed groove, and the cross section of the closed groove is a right trapezoid corresponding to the inclined plane of the right trapezoid.
4. The positive pressure resistant plastic composite pipe sleeve type flange connection device according to claim 2, wherein: the two annular sealing check blocks are further provided with positioning grooves, annular positioning plates are further arranged outside the annular sealing rings, and the annular positioning plates are located in the positioning grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223297628.1U CN218954286U (en) | 2022-12-09 | 2022-12-09 | Positive pressure-resistant plastic composite pipe sleeve type flange connection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223297628.1U CN218954286U (en) | 2022-12-09 | 2022-12-09 | Positive pressure-resistant plastic composite pipe sleeve type flange connection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218954286U true CN218954286U (en) | 2023-05-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223297628.1U Active CN218954286U (en) | 2022-12-09 | 2022-12-09 | Positive pressure-resistant plastic composite pipe sleeve type flange connection device |
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| Country | Link |
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| CN (1) | CN218954286U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117226215A (en) * | 2023-10-31 | 2023-12-15 | 武汉一冶钢结构有限责任公司 | An on-site installation method for closing the cylinder of large-scale 304L tubular equipment |
-
2022
- 2022-12-09 CN CN202223297628.1U patent/CN218954286U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117226215A (en) * | 2023-10-31 | 2023-12-15 | 武汉一冶钢结构有限责任公司 | An on-site installation method for closing the cylinder of large-scale 304L tubular equipment |
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