CN214274819U - Metal seal ring gasket with leakage detection function - Google Patents
Metal seal ring gasket with leakage detection function Download PDFInfo
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- CN214274819U CN214274819U CN202022365514.0U CN202022365514U CN214274819U CN 214274819 U CN214274819 U CN 214274819U CN 202022365514 U CN202022365514 U CN 202022365514U CN 214274819 U CN214274819 U CN 214274819U
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Abstract
The utility model relates to a metal seal ring pad with leak testing function, including a metal seal ring pad, its upper and lower terminal surface and lateral surface are equipped with communicating leakage hole, a leakage pipe connect perpendicularly in metal seal ring pad outside surface and with the leakage hole be linked together, the leakage pipe is connected with detection device through the nut joint on its terminal screwed joint and the screwed joint, the faying face vacuole formation of the upper and lower terminal surface of metal seal ring pad and connecting piece, the cavity is linked together with detection device through leakage hole and leakage pipe. If leakage occurs at the sealing surface of the inner side of the ring gasket and the joint of the connecting piece, the medium enters the cavity and flows towards the leakage hole, and finally contacts the detection device through the leakage pipe.
Description
Technical Field
The utility model relates to a metal seal ring pad with leak testing function belongs to the flange seal field.
Background
The metal sealing ring gasket is suitable for sealing high-temperature and high-pressure pipeline flanges and is mainly applied to the fields of offshore oil and gas transmission pipelines, petroleum production, oil refining industry, boilers and the like. In the process of offshore operation in the past years, a plurality of accidents are caused by flange leakage, and the leakage of a sealing ring gasket at the flange joint of an oil and gas pipeline forms a huge safety risk due to the existence of hydrocarbon. In the prior art, metal sealing ring gaskets are pressed by using a certain specific pressure between a sealing surface of the ring gasket and a flange or an end face of a connecting piece so as to ensure sealing, such as the metal sealing ring mentioned in Liu Yong Jun, Wu Guofeng and the leakage model research [ J ] of a metal O-shaped ring sealing structure, wherein the metal sealing ring is lubricated and sealed (2019,44(9):19-24. DOI: 10.3969/j.issn.0254-0150.2019.09.004), but the sealing condition of the ring gasket is not monitored in real time, so that attention can be paid only when harmful media leak into the environment after sealing failure, and at the moment, safety accidents are often caused, and the safety detection of the sealing ring gasket is extremely passive.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a metal seal ring pad with leak testing function to improve the reliability that the flange is sealed under high temperature, high pressure condition, in case the inboard sealed face of metal seal ring pad takes place to leak, this ring pad can in time signal, prevents that harmful medium from leaking to the external environment in.
The utility model discloses specifically take following technical scheme:
a metal seal ring gasket with a leakage detection function is characterized in that an upper end face, a lower end face and an outer side face of the metal seal ring gasket are provided with communicated leakage holes, a leakage pipe is perpendicularly connected to the outer side face of the metal seal ring gasket and is communicated with the leakage holes, the leakage pipe is connected with a detection device through a threaded joint at the tail end of the leakage pipe and a nut joint on the threaded joint, a cavity is formed by the upper end face and the lower end face of the metal seal ring gasket and a joint face of a connecting piece, and the cavity is communicated with the detection device through the leakage holes and the leakage pipe.
The utility model discloses a further technical scheme is: the metal sealing ring gasket is one of a metal octagonal gasket, a metal elliptical gasket and a metal lens gasket, and the cross sections of the metal octagonal gasket, the metal elliptical gasket and the metal lens gasket are octagonal, elliptical and trapezoidal after being cut along the radial direction.
The cross section of the leakage hole is in a horizontal T shape.
The aperture of the leakage pipe is larger than or equal to that of the leakage hole.
The upper end face and the lower end face of the metal lens pad are provided with annular grooves along the circumference of the annular pad, and the bottom of each annular groove is communicated with the leakage hole to form a cavity.
The tail end of the leakage pipe is connected with a threaded joint in a welding mode, and the threaded joint and a nut joint are fixed in a threaded connection mode.
The detection end of the detection device is bonded inside the nut joint, and a section of closed cylindrical shell is formed between the nut joint and the detection device and is used as a buffer area of leakage media.
The detection device is one of a pressure detector, a VOC detector and an indicator.
When the leakage of the first sealing surface exists, a medium can flow into the cavity and contact the detection device along the leakage pipe through the leakage hole, the second sealing surface can prevent the medium from leaking to the external environment or leaking in a larger amount, the detection device and remote monitoring equipment are in wireless or wired communication, and safety personnel can monitor whether the flanges are connected with the leakage-free flanges in real time.
The utility model has the advantages that:
1. when the first sealing surface fails, the second sealing surface can prevent the leaked medium entering the cavity from further diffusing to the external environment, and ensure that the leaked medium is detected by the detection device before leaking to the external environment, and the detection device can remotely transmit signals, so that the sealing conditions of a plurality of ring gaskets can be simultaneously monitored.
2. The invention can not only realize the detection and the alarm when the first sealing surface leaks, but also store certain leakage media in the cavity, the leakage hole, the leakage pipe and the nut end shell of the detection device formed by the ring gasket and the flange when the leakage scale is not large, thereby avoiding the leakage of harmful media to the external environment.
3. The invention can realize upgrading only by slightly changing the existing metal ring gasket and carrying out small-scale turning, milling and welding on the original metal, so the invention has good economy.
4. The invention can be matched with the flange without changing the structure of the flange and can play a role of leakage detection, so that the existing metal ring pad can be directly replaced, and the practicability and the universality of the invention are stronger.
Drawings
FIG. 1 is a top view of a metal octagonal pad with leak detection functionality;
FIG. 2 is a cross-sectional view taken along A-A of FIG. 1;
wherein, 1, a metal octagonal pad; 2. a leak hole; 3. a leak pipe; 4. a threaded joint; 5. a nut fitting; 6. and (4) a detection device.
Fig. 3 is a schematic view showing the assembly of a metal octagonal gasket with a leakage detection function and a flange.
Wherein, 7, the first sealing surface; 8. a second sealing surface; 9. a cavity; 10. and (4) a flange.
FIG. 4 is a top view of a metal elliptical pad with leak detection;
FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4;
wherein, 2, a leakage hole; 3. a leak pipe; 4. a threaded joint; 5. a nut fitting; 6. a detection device; 11. A metal elliptical pad.
FIG. 6 is a schematic view of an assembly of an oval metal gasket with a leak detection function and a flange;
wherein, 7, the first sealing surface; 8. a second sealing surface; 9. a cavity; 10. and (4) a flange.
FIG. 7 is a top view of a metal lens pad with leak detection;
13, a ring groove.
FIG. 8 is a cross-sectional view taken along A-A of FIG. 7;
wherein, 2, a leakage hole; 3. a leak pipe; 4. a threaded joint; 5. a nut fitting; 6. a detection device; 12. A metal lens pad.
FIG. 9 is a schematic view of the assembly of a metal lens pad with a leak detection function with a flange;
wherein: 7. a first sealing surface; 8. a second sealing surface; 9. a cavity; 10. and (4) a flange.
Detailed Description
Example 1:
in the petrochemical industry, the joint parts of equipment such as towers, tanks, heat exchangers, pipelines and the like need to be sealed under the working conditions of the maximum temperature of 1000 ℃, the maximum pressure of the constant pressure or the alternating pressure of approximately 1500bar and corrosiveness. The metal octagonal cushion is a solid metal gasket with the section shape of an octagonal shape formed by forging, heat treatment and machining of metal materials, has a radial self-tightening sealing effect under the action of a bolt force on a flange, is suitable for being used under the high-temperature and high-pressure conditions, is extremely dangerous due to the fact that high-temperature and high-pressure corrosive media are leaked, can timely give out early warning, and has a good application prospect.
Referring to fig. 1 to 3, a metal octagonal pad with a leakage detection function includes a metal octagonal pad 1, a leakage pipe 3 connected to the octagonal pad 1, a threaded joint 4 connected to the end of the leakage pipe 3, a nut joint 5 connected to the threaded joint 4, and a detection device 6 connected to the nut joint 5. The metal octagonal pad 1 is provided with communicated leakage holes 2 on the upper end surface, the lower end surface and the outer side surface, the leakage holes 2 are communicated with a leakage pipe 3, and the tail end of the leakage pipe 3 is connected with a detection device 6 through a threaded joint 4 and a nut joint 5. The upper end face and the lower end face of the octagonal cushion 1 and the joint face of the connecting piece form a cavity 9, and the cavity 9 is communicated with the detection device 6 through the leakage hole 2 and the leakage pipe 3.
When in construction, the metal octagonal cushion 1 with the leakage detection function is pressed between flanges 10 which are needed to be connected at two sides, the upper end and the lower end of the octagonal cushion 1 are respectively clamped at the trapezoidal groove arranged on the end surface of the flange 10, the inner side inclination angle 7 and the outer side inclination angle 8 of the octagonal cushion and the trapezoidal groove inclined plane of the flange 10 respectively form a first sealing surface 7 and a second sealing surface 8, the upper end and the lower end of the octagonal cushion and the trapezoidal groove bottom surface and the side surface of the flange 10 form a cavity 9, when there is a leak in the first sealing surface 7, the medium will flow into the cavity 9 and through the leak hole 2 along the leak tube 3 to the detection means 6, the second sealing surface 8 can prevent the medium from leaking to the external environment or leaking in a larger amount, wireless or wired communication is carried out between the detection device 6 of the sealing octagonal pad at each position of the equipment or pipeline and remote monitoring equipment, and safety personnel can monitor the leakage of a plurality of flange connections in real time.
The octagonal cushion 1 is octagonal in cross section after being cut along the radial direction, the edges of the upper end face and the lower end face of the octagonal cushion are an inward inclination angle 7 and an outward inclination angle 8 which are 1-5 mm in width and form an angle of 23 degrees with the axial direction, the surface roughness of the inclination angles is smaller than Ra3.2, and the rest surfaces are provided with corrugated grooves along the circumferential direction. The leakage hole 2 has a horizontal T-shaped cross-section, the purpose of which is to connect the cavity 9 with the leakage duct 3. The aperture of the leakage pipe 3 is larger than or equal to that of the leakage hole 2, and the leakage pipe 3 is vertically connected to the outer side surface of the ring gasket in a welding mode and communicated with the leakage hole 2.
The end of the leakage pipe 3 is connected with the threaded joint 4 in a welding mode, and the threaded joint 4 is fixed with the nut joint 5 in a threaded connection mode. The detection end of the detection device 6 is bonded inside the nut joint 5, a section of closed cylindrical shell is formed between the nut joint 5 and the detection device 6, the cylindrical shell is used as a buffer area for leaking media, and the detection device 6 is used for detecting whether media leak.
The detection device 6 is a pressure detector which has the function of immediately sending a radio signal to the monitoring equipment when detecting an excessively high pressure, thereby ensuring that the leakage at the sealing position is found in time.
Example 2:
the metal elliptical pad is a metal ring pad with an elliptical cross section and used for flange sealing, the elliptical pad with the arc surface is arranged in the trapezoidal ring grooves of the two connecting flanges, and the use scene is basically the same as that of the metal octagonal pad. But the sealing surface of the elliptical gasket is narrower than that of the octagonal gasket, so that the pretightening force is smaller and the sealing performance is better.
Referring to fig. 4 to 6, a metal elliptical pad with a leakage detection function comprises a metal elliptical pad 11, a leakage pipe 3 connected to the elliptical pad 13, a threaded joint 4 connected to the end of the leakage pipe 3, a nut joint 5 connected to the threaded joint 4, and a detection device 6 connected to the nut joint 5. The oval pad of metal 11 up and down terminal surface and outside be equipped with communicating leakage hole 2, leakage hole 2 be linked together with leakage pipe 3, 3 ends of leakage pipe and detection device 6 pass through screwed joint 4 and nut joint 5 and be connected. The upper end surface and the lower end surface of the elliptical pad 13 and the joint surface of the connecting piece form a cavity 9, and the cavity 9 is communicated with the detection device 6 through the leakage hole 2 and the leakage pipe 3.
During construction, the metal elliptical pad 11 with the leakage detection function is compressed between flanges 10 which are needed to be connected at two sides, the upper end and the lower end of a lens pad 23 are clamped into trapezoidal grooves formed in the end faces of the flanges 10 respectively, a first sealing face 7 and a second sealing face 8 are formed on the inner side and the outer side of the elliptical pad and the inclined faces of the trapezoidal grooves of the flanges 10 respectively, a cavity 9 is formed between the upper end face and the lower end face of the elliptical pad and the bottom face and the side face of the trapezoidal grooves of the flanges 10, when the first sealing face 7 leaks, a medium can flow into the cavity 9 and contact the detection device 6 along the leakage pipe 3 through the leakage hole 2, the second sealing face 8 can prevent the medium from leaking to the external environment or leaking in a large amount, wired or wireless communication is carried out between the detection device 6 of the sealed elliptical pad at each position of the equipment or the pipeline and remote monitoring equipment, and safety personnel can monitor whether the flanges are connected in multiple positions in real time.
The tail end of the leakage pipe 3 is connected with the threaded joint 4 in a welding mode, and the threaded joint 4 is fixed with the nut joint 5 in a threaded connection mode. The detection end of the detection device 6 is bonded inside the nut joint 5, a section of closed cylindrical shell is formed between the nut joint 5 and the detection device 6, the cylindrical shell is used as a buffer area for leaking media, and the detection device 6 is used for detecting whether media leak.
The detection device 6 is a VOC detector which has the function of immediately sending a radio signal to monitoring equipment when toxic and harmful VOC gas is detected, so that the leakage of the sealing position is ensured to be found in time.
Example 3:
the metal lens pad is a metal ring pad with a trapezoidal section, is usually used in a flange seal with a nominal diameter of less than 200mm, and has an applicable nominal pressure of 16.0-32.0 MPa and a use temperature of-30-200 ℃.
Referring to fig. 1 to 3, a metal lens pad with a leakage detecting function includes a metal lens pad 12, a leakage pipe 3 connected to the lens pad 23, a screw joint 4 connected to an end of the leakage pipe 3, a nut joint 5 connected to the screw joint 4, and a detecting device 6 connected to the nut joint 5. The upper end surface, the lower end surface and the outer side surface of the metal lens pad 12 are provided with communicated leakage holes 2. The upper and lower end faces of the metal lens pad 12 are provided with annular grooves 13 along the circumference of the annular pad, the bottoms of the annular grooves 13 are communicated with the leakage holes 2 and divide the upper and lower end faces of the lens pad into an inner end face 29 and an outer end face 30, and the purpose is to form the cavity 9. The leakage hole 2 is communicated with the leakage pipe 3, and the tail end of the leakage pipe 3 is connected with the detection device 6 through the threaded joint 4 and the nut joint 5. The upper end surface and the lower end surface of the lens pad 23 and the joint surface of the connecting piece form a cavity 9, and the cavity 9 is communicated with the detection device 6 through the leakage hole 2 and the leakage pipe 3.
When in construction, the metal lens pad 12 with the leakage detection function is pressed between flanges 10 which are needed to be connected at two sides, the upper end and the lower end of the lens pad 23 are respectively clamped at the trapezoidal groove arranged on the end surface of the flange 10, the inner end surface 29 and the outer end surface 30 of the lens pad and the inclined plane of the trapezoidal groove of the flange 10 respectively form a first sealing surface 7 and a second sealing surface 8, the ring grooves 13 on the upper end surface and the lower end surface of the lens pad and the bottom surface of the trapezoidal groove of the flange 10 form a cavity 9, when there is a leak in the first sealing surface 7, the medium will flow into the cavity 9 and through the leak hole 2 along the leak tube 3 to the detection means 6, the second sealing surface 8 can prevent the medium from leaking to the external environment or leaking in a larger amount, wireless or wired communication is carried out between the detection device 6 of the sealing lens pad at each position of the equipment or pipeline and remote monitoring equipment, and safety personnel can monitor whether the flange connection at multiple positions has no leakage in real time.
The cross section of the lens pad 23 after being cut along the radial direction is trapezoid with rectangular gaps on the side edges, the side edges of the trapezoid form an inclination angle of 20 degrees with the radial direction, the width of the annular groove 13 arranged on the upper end surface and the lower end surface of the lens pad is 2-4 mm, the roughness of the upper end surface and the lower end surface of the lens pad is less than Ra3.2, and the other surfaces are provided with corrugated grooves along the circumferential direction.
The leakage hole 2 has a horizontal T-shaped cross-section, the purpose of which is to connect the cavity 9 with the leakage duct 3. The aperture of the leakage pipe 3 is larger than or equal to that of the leakage hole 2, and the leakage pipe 3 is vertically connected to the outer side surface of the ring gasket in a welding mode and communicated with the leakage hole 2. The detection end of the detection device 6 is bonded inside the nut joint 5, a section of closed cylindrical shell is formed between the nut joint 5 and the detection device 6, the cylindrical shell is used as a buffer area for leaking media, and the detection device 6 is used for detecting whether media leak.
The detection means 6 is an indicator having the characteristic of changing colour when a specific medium is detected, thereby ensuring that a leak at the seal is detected in time.
Claims (8)
1. A metal seal ring gasket with a leakage detection function is characterized in that an upper end face, a lower end face and an outer side face of the metal seal ring gasket are provided with communicated leakage holes, one end of a leakage pipe is vertically connected to the outer side face of the metal seal ring gasket and communicated with the leakage holes, the leakage pipe is connected with a detection device through a threaded joint at the tail end of the leakage pipe and a nut joint on the threaded joint, a cavity is formed by the upper end face and the lower end face of the metal seal ring gasket and a joint face of a connecting piece, and the cavity is communicated with the detection device through the leakage holes and the leakage pipe.
2. The metal sealing ring gasket with leak detection as defined in claim 1, wherein said leak hole is formed in a horizontal T-shape in cross section.
3. The metal seal ring gasket with leak detection as defined in claim 1, wherein said leak pipe has a bore diameter greater than or equal to a bore diameter of the leak hole.
4. The metal gasket of claim 1 wherein said leak pipe end is connected to a threaded fitting by welding, said threaded fitting being threadably secured to a nut fitting.
5. The metal gasket of claim 1 wherein said test device has a probe end bonded to the inside of said nut fitting, and a closed cylindrical housing is formed between said nut fitting and said test device to serve as a buffer for leakage medium.
6. The metal sealing ring gasket with leak detection as set forth in claim 1, wherein said detection means is one selected from the group consisting of a pressure detector, a VOC detector, and an indicator.
7. The metal gasket of claim 1, wherein the metal gasket is one of a metal octagonal gasket, a metal elliptical gasket and a metal lens gasket, and the cross sections of the metal octagonal gasket, the metal elliptical gasket and the metal lens gasket are octagonal, elliptical and trapezoidal after being cut along the radial direction.
8. The metal gasket of claim 7 wherein said metal lens has a ring groove formed on the upper and lower end surfaces thereof along the circumference of the gasket, the bottom of the ring groove communicating with the leakage hole to form a cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022365514.0U CN214274819U (en) | 2020-10-22 | 2020-10-22 | Metal seal ring gasket with leakage detection function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022365514.0U CN214274819U (en) | 2020-10-22 | 2020-10-22 | Metal seal ring gasket with leakage detection function |
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| Publication Number | Publication Date |
|---|---|
| CN214274819U true CN214274819U (en) | 2021-09-24 |
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| CN202022365514.0U Active CN214274819U (en) | 2020-10-22 | 2020-10-22 | Metal seal ring gasket with leakage detection function |
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| CN (1) | CN214274819U (en) |
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- 2020-10-22 CN CN202022365514.0U patent/CN214274819U/en active Active
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