CN105928669A - Flange connection leakage early warning device - Google Patents
Flange connection leakage early warning device Download PDFInfo
- Publication number
- CN105928669A CN105928669A CN201610252909.5A CN201610252909A CN105928669A CN 105928669 A CN105928669 A CN 105928669A CN 201610252909 A CN201610252909 A CN 201610252909A CN 105928669 A CN105928669 A CN 105928669A
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- Prior art keywords
- flange
- metal clip
- leakage
- early warning
- pair
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
Abstract
The invention relates to a flange connection leakage early warning device which is characterized by comprising a flange sealing system and a leakage protection early warning system. The flange sealing system is mainly composed of a pair of metal hoops which are semicircular-ring-shaped, and the internal sides of the metal hoops are provided with grooves of which the cross sections are rectangular. The pair of metal hoops are mutually matched so as to clamp the edge of a flange in a sealing way. The leakage protection early warning system comprises a buffer tank which is provided with a pressure gauge, and a spherical valve is arranged at the bottom part of the buffer tank. An alarm device is also connected on the pressure gauge. The buffer tank is connected with one metal hoop in a communicating way through a leakage medium discharge channel. The device can be applied to the complex conditions of high temperature, high pressure and vibration and can maintain great sealing performance for a long time so that leakage of the flange can be effectively prevented, the leakage situation of the flange can be monitored in real time, the early warning device performs early warning to prompt personnel evacuation when leakage occurs, and the buffer tank is arranged to buffer leakage for time of personnel evacuation.
Description
Technical field
The present invention relates to the sealing construction applications of flange, be specifically related to a kind of Flange joint leakage prior-warning device.
Background technology
Flange sealing structure is widely used in petrochemical industry because of its easy-to-dismount advantage.The static seal point of five set main devices, six set corollary apparatus and seven auxiliary shops of producing 30000000000000 tons of ethylene according to statistics in a large-scale petroleum chemical plant per year is ten hundreds of.The protection to leak the keypoint part flange of full plant area and monitoring are inappropriate by manpower and enhancing patrol.The a lot of fluids processed due to chemical plant are inflammable, explosive, poisonous or corrosive working medias, and generally have pressure and temperature, once occur leakage that material will be caused to run off and energy loss, cause environmental pollution, production can not be normally carried out, increase unscheduled maintenance and shut-down, even jeopardize the consequences such as health and life security.What in traditional Flanged Connection System, bolt was subject to is tensile load, and bolt can produce stress relaxation effect under the high temperature conditions.It is easy under traditional operating mode being bolted to the complexity such as high temperature, high pressure, vibrations occur loosening or pretightning force deficiency to leak, and traditional flange connection is difficult to be monitored and early warning after leakage generation.
Summary of the invention
For above-mentioned technical problem, it is an object of the invention to provide a kind of Flange joint leakage prior-warning device, this device can be applied to the complex working conditions such as high temperature, high pressure, vibrations, the sealing that long-term holding is good, effectively prevent the leakage of flange, it is possible to the real-time leakage situation to flange is monitored, after leakage occurs, have prior-warning device early warning, with prompting, personnel withdraw, and to have surge tank be that personnel withdraw and race against time as the buffering of leakage.
For achieving the above object, the technical solution used in the present invention is:
A kind of Flange joint leakage prior-warning device, it is characterised in that: it includes flange seal system and leak protection early warning system；
Described flange seal system is mainly made up of a pair metal clip, and described metal clip is semi-circular shape, offers the groove that cross section is rectangle inside it, and the pair of metal clip cooperates and blocked by the edge seal of flange；The upper flange plate of described flange and the surface of lower flange is circumferentially distributed a deep blind hole of delineation, the pair of metal clip is provided with the bolt hole corresponding with depthkeeping blind hole, is screwed with depthkeeping bolt in bolt hole, and depthkeeping bolt end pushes against depthkeeping blind via bottom；Two square-section grooves circumferentially it are provided with bottom described metal clip inboard groove, being equipped with O RunddichtringO bottom a pair metal clip inboard groove in two square-section grooves, two O RunddichtringOs contact with the lateral surface crush seal of upper flange plate and lower flange respectively；The outside at described metal clip two ends is equipped with connecting plate, and connecting plate offers bolt hole, connects by connecting plate and connecting bolt are fixing between a pair metal clip；It is respectively equipped with the groove and projection being mutually matched, described groove and protruding axial distribution on the end face at described metal clip two ends, between groove and projection, is additionally provided with bar pad；
Described leak protection early warning system includes that surge tank, surge tank are provided with Pressure gauge, is provided with globe valve bottom it, and Pressure gauge is also associated with an alarm device；Described surge tank is connected with a metal clip in flange seal system by leaking medium discharge-channel.
Described globe valve is electrical switch globe valve, and Pressure gauge is electronic pressure gage, and between the two by data wire or dedicated radio link.
The device having the beneficial effect that in the present invention acquired by the present invention can be applied to the complex working conditions such as high temperature, high pressure, vibrations, the sealing that long-term holding is good, effectively prevent the leakage of flange, the leakage situation to flange that can be real-time is monitored, prior-warning device early warning is had after leakage occurs, with prompting, personnel withdraw, and to have surge tank be that personnel withdraw and race against time as the buffering of leakage.Wherein in metal clip for the depthkeeping bolt of pretension by compressive load unconventional tensile load, and typically high temperature bolt slack under compression is less than the slack under stretching condition, improve the service life of bolt compared with conventional flange sealing structure.The bolt positioning hole depthkeeping blind hole of flange, does not opens hole, enhances the strength and stiffness of flange, and large diameter bolt can be used to connect, and while bolt bearing capacity so can be made to reduce, increases pad thrust, it is ensured that its being completely embedded property.Being provided with the O RunddichtringO as the second resealing inside metal clip, secondary seal structure makes the sealing effectiveness of flange more preferably, reduces unplanned maintenance and shutdown times.Leakage can be made a response by prior-warning device fast and accurately, it is possible to early warning timely is withdrawn with prompting personnel.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the schematic top plan view of flange section in the present invention.
Fig. 3 is flange seal system structure schematic diagram (i.e. schematic cross-section) in the present invention.
In figure: 1 connecting plate, 2 metal clip, 3 depthkeeping bolts, 4 check washers, 5 upper flange plates, 6 O RunddichtringOs, 7 square-section grooves, 8 leaking medium discharge-channels, 9 surge tanks, 10 Pressure gauges, 11 alarm devices, 12 globe valves, 13 pads, 14 lower flanges, 15 bar pads, 16 connecting bolts, 17 depthkeeping blind holes.
Detailed description of the invention
In order to be more fully understood that the present invention, below in conjunction with embodiment and accompanying drawing, technical scheme is described further (as Figure 1-3).
A kind of Flange joint leakage prior-warning device, it includes flange seal system and leak protection early warning system；
Described flange seal system is mainly made up of a pair metal clip 2, described metal clip 2 is semi-circular shape, offering groove that cross section is rectangle (i.e. metal clip 2 cross section for " ［ " type) inside it, the pair of metal clip 2 cooperates and is blocked by the edge seal of flange (described flange is made up of upper flange plate 5, lower flange 14 and pad 13) (will the complete sealed bundle in the edge of flange wrap)；The upper flange plate 5 of described flange and surface (the i.e. upper surface of upper flange plate 5 of lower flange 14, the lower surface of lower flange 14) circumferentially distributed there is a deep blind hole of delineation 17, the pair of metal clip 2 is provided with bolt hole (the i.e. quantity corresponding with depthkeeping blind hole 17, position, size is corresponding), it is screwed with in bolt hole between depthkeeping bolt 3(depthkeeping bolt 3 and metal clip 2 and is provided with check washer 4), depthkeeping bolt 3 termination pushes against bottom depthkeeping blind hole 17 that (described upper flange plate 5 has depthkeeping blind hole 17 with the ring flange Surface Machining of lower flange 14, pretightning force is provided by depthkeeping bolt 3 for pad 13 after metal clip 2 clamping upper flange plate 5 with lower flange 14, form the first order to seal)；Two square-section grooves 7 circumferentially it are provided with bottom described metal clip 2 inboard groove, being equipped with O RunddichtringO 6 bottom a pair metal clip 2 inboard groove in two square-section grooves 7, two O RunddichtringOs 6 contact (being provided with O RunddichtringO 6 inside described metal clip 2 to extrude after installation is complete outside the ring flange of upper flange plate 5 and lower flange 14 to form second level sealing) respectively with the lateral surface crush seal of upper flange plate 5 and lower flange 14；The outside at described metal clip 2 two ends is equipped with connecting plate 1, and connecting plate 1 offers bolt hole, by connecting plate 1 and the fixing connection of connecting bolt 16 between a pair metal clip 2；It is respectively equipped with the groove and projection being mutually matched, described groove and protruding axial distribution on the end face at described metal clip 2 two ends, is provided with bar pad 15 in being additionally provided with bar pad 15(i.e. groove between groove and projection, is used for sealing)；
Described leak protection early warning system includes that surge tank 9, surge tank 9 are provided with Pressure gauge 10, is provided with globe valve 12 bottom it, and Pressure gauge 10 is also associated with an alarm device 11；Described surge tank 9 is connected (i.e. leaking medium enters surge tank 9 by leaking medium discharge-channel 8, and surge tank 9 is by globe valve 12 pressure release) by leaking medium discharge-channel 8 with the metal clip 2 in flange seal system.
Described globe valve 12 is electrical switch globe valve, and Pressure gauge 10 is electronic pressure gage, and between the two by data wire or dedicated radio link.
The use principle of a kind of Flange joint leakage prior-warning device: 1, the pressure recorded is delivered to alarm device 11 through data wire or wireless form by Pressure gauge 10, when the pressure in the surge tank 9 that Pressure gauge 10 records reaches the preset value of alarm device, alarm activation horn blew are to notify that personnel withdraw.2, the switch that can trigger globe valve 12 when the pressure in the surge tank 9 that Pressure gauge 10 records reaches and presets and release value is opened, and surge tank 9 is carried out pressure release.
The Application Example being only the present invention described above, the interest field that certainly can not limit the present invention with this, therefore change according to the equivalence that scope of the present invention patent is made, still belong to protection scope of the present invention.
Claims (2)
1. a Flange joint leakage prior-warning device, it is characterised in that: it includes flange seal system and leak protection early warning system；
Described flange seal system is mainly made up of a pair metal clip (2), and described metal clip (2) is semi-circular shape, offers the groove that cross section is rectangle inside it, and the pair of metal clip (2) cooperates and blocked by the edge seal of flange；The upper flange plate (5) of described flange and the surface of lower flange (14) is circumferentially distributed the deep blind hole of a delineation (17), the pair of metal clip (2) is provided with the bolt hole corresponding with depthkeeping blind hole (17), being screwed with depthkeeping bolt (3) in bolt hole, depthkeeping bolt (3) termination pushes against depthkeeping blind hole (17) bottom；Two square-section grooves (7) circumferentially it are provided with bottom described metal clip (2) inboard groove, being equipped with O RunddichtringO (6) bottom a pair metal clip (2) inboard groove in two square-section grooves (7), the lateral surface crush seal with upper flange plate (5) and lower flange (14) respectively of two O RunddichtringOs (6) contacts；The outside at described metal clip (2) two ends is equipped with connecting plate (1), and connecting plate offers bolt hole on (1), connects by connecting plate (1) and connecting bolt (16) are fixing between a pair metal clip (2)；It is respectively equipped with the groove and projection being mutually matched, described groove and protruding axial distribution on the end face at described metal clip (2) two ends, between groove and projection, is additionally provided with bar pad (15)；
Described leak protection early warning system includes that surge tank (9), surge tank (9) are provided with Pressure gauge (10), is provided with globe valve (12) bottom it, and Pressure gauge (10) is also associated with an alarm device (11)；Described surge tank (9) is connected with a metal clip (2) in flange seal system by leaking medium discharge-channel (8).
A kind of Flange joint leakage prior-warning device the most according to claim 1, it is characterised in that: described globe valve (12) is electrical switch globe valve, and Pressure gauge (10) is electronic pressure gage, and between the two by data wire or dedicated radio link.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610252909.5A CN105928669A (en) | 2016-04-22 | 2016-04-22 | Flange connection leakage early warning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610252909.5A CN105928669A (en) | 2016-04-22 | 2016-04-22 | Flange connection leakage early warning device |
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| Publication Number | Publication Date |
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| CN105928669A true CN105928669A (en) | 2016-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610252909.5A Pending CN105928669A (en) | 2016-04-22 | 2016-04-22 | Flange connection leakage early warning device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355611A (en) * | 2017-08-11 | 2017-11-17 | 慧感(上海)物联网科技有限公司 | A kind of online collecting mechanism of hoop type flange sealing leak |
| CN109340565A (en) * | 2018-11-09 | 2019-02-15 | 中国科学院合肥物质科学研究院 | The storage tank more changing device of liquid nitrogen automatic filling system |
| CN113834841A (en) * | 2020-06-23 | 2021-12-24 | 核工业西南物理研究院 | Liquid nitrogen thermal shock testing device for butt welding seam of metal pipeline |
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| CN203880274U (en) * | 2014-05-13 | 2014-10-15 | 武汉工程大学 | High-temperature pipeline flange |
| CN104567747A (en) * | 2015-01-20 | 2015-04-29 | 武汉工程大学 | High-temperature flange leakage monitoring device based on laser rangefinder |
| CN204420390U (en) * | 2015-01-27 | 2015-06-24 | 武汉工程大学 | A kind of novel flange sealing configuration |
| CN105004493A (en) * | 2015-07-17 | 2015-10-28 | 武汉工程大学 | Leakage-detecting device for bolted flange connection system |
| CN105069208A (en) * | 2015-07-29 | 2015-11-18 | 武汉工程大学 | Method for evaluating tightness of high-temperature flange connection system |
| CN105423018A (en) * | 2016-01-08 | 2016-03-23 | 武汉工程大学 | Leakage detecting device of high-temperature flange connecting system |
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2016
- 2016-04-22 CN CN201610252909.5A patent/CN105928669A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203880274U (en) * | 2014-05-13 | 2014-10-15 | 武汉工程大学 | High-temperature pipeline flange |
| CN104101470A (en) * | 2014-06-25 | 2014-10-15 | 武汉工程大学 | Pipeline flange test system |
| CN104567747A (en) * | 2015-01-20 | 2015-04-29 | 武汉工程大学 | High-temperature flange leakage monitoring device based on laser rangefinder |
| CN204420390U (en) * | 2015-01-27 | 2015-06-24 | 武汉工程大学 | A kind of novel flange sealing configuration |
| CN105004493A (en) * | 2015-07-17 | 2015-10-28 | 武汉工程大学 | Leakage-detecting device for bolted flange connection system |
| CN105069208A (en) * | 2015-07-29 | 2015-11-18 | 武汉工程大学 | Method for evaluating tightness of high-temperature flange connection system |
| CN105423018A (en) * | 2016-01-08 | 2016-03-23 | 武汉工程大学 | Leakage detecting device of high-temperature flange connecting system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355611A (en) * | 2017-08-11 | 2017-11-17 | 慧感(上海)物联网科技有限公司 | A kind of online collecting mechanism of hoop type flange sealing leak |
| CN107355611B (en) * | 2017-08-11 | 2022-10-11 | 慧感(上海)物联网科技有限公司 | Clamp formula flange seal leaks on-line collection mechanism |
| CN109340565A (en) * | 2018-11-09 | 2019-02-15 | 中国科学院合肥物质科学研究院 | The storage tank more changing device of liquid nitrogen automatic filling system |
| CN113834841A (en) * | 2020-06-23 | 2021-12-24 | 核工业西南物理研究院 | Liquid nitrogen thermal shock testing device for butt welding seam of metal pipeline |
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Application publication date: 20160907 |