CN103884390A - Strong sealing device for online replacement of ultrasonic transducer - Google Patents
Strong sealing device for online replacement of ultrasonic transducer Download PDFInfo
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- CN103884390A CN103884390A CN201210561023.0A CN201210561023A CN103884390A CN 103884390 A CN103884390 A CN 103884390A CN 201210561023 A CN201210561023 A CN 201210561023A CN 103884390 A CN103884390 A CN 103884390A
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- transducer
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Abstract
A strong sealing device for online replacement of an ultrasonic transducer comprises an explosion-proof cover, a transducer fixing device, a transducer block and a movable regulating rod. The movable regulating rod penetrates the transducer fixing device. An upper connection head is arranged between the explosion-proof cover and the transducer fixing device, and a lower connection head is arranged between the transducer fixing device and the transducer block. Sealing rings are arranged between the explosion-proof cover and the upper connection head as well as between the lower connection head and the transducer block. An internal thread ball valve is arranged on the middle section of the transducer fixing device. An upper air-sealed dynamic pressure O-shaped ring is arranged between the upper connection head and the movable regulating rod, and a lower air-sealed dynamic pressure O-shaped ring is arranged between the lower connection head and the movable regulating rod. By the aid of internal sealing isolation and external sealing isolation of the sealing structure, an ultrasonic flowmeter can always be kept sealed with no leakage during the course of the movable regulating rod leaving or entering the transducer fixing device.
Description
Technical field
The present invention is relevant with ultrasonic flow meter, specifically, is the strong packoff for online its ultrasonic transducer of replacing in a kind of ultrasonic flow meter.
Background technology
Ultrasonic flow meter becomes the first-selected instrument of gas dosing gradually, as its main parts ultrasonic transducer be hold most flimsy.When overhauling at the scene, safeguard and changing, generally measured pipeline will be stopped the supple of gas or steam, otherwise construction is very difficult, even cannot carry out.In, in bigbore flow metering, maintenance is especially protruded with both contradiction of running.At present, much ultrasonic flow meter manufacturer has considered these problems, and has done many work, and some product also can carry out the online ultrasonic transducer of changing under operating mode.But its complex structure, operating difficulties, especially its sealing problem is not solved preferably, and within activity adjustment bar and ultrasonic transducer stationary installation, wall Seal Design is reasonable not, still adopts packing_seal method, uses packing as airtight and watertight padding.Packing is to be formed through dipping PTFE emulsion or aquadag braiding by asbestos yarn braiding, really has excellent sealing effectiveness under static seal condition; But, under motive seal duty, along with activity adjustment bar repeatedly reciprocating in wall within ultrasonic transducer stationary installation, because not having elasticity, its packing filling gradually loses sealing property, and, even under static seal condition, its pressure that can bear is also very limited, can not exceed the working pressure of 4MPa.
Summary of the invention
The improvement that the present invention be directed to the online replacing ultrasonic transducer difficulty of existing ultrasonic flow meter existence and make, especially improves the online ultrasonic transducer of changing under the operating mode that can not stop the supple of gas or steam at measured pipeline for its hermetically-sealed construction.
The present invention proposes following technical scheme: for the online strong hermetically-sealed construction of changing ultrasonic transducer, comprise Explosion-proof cap, transducer stationary installation, transducer holder and through the activity adjustment bar in transducer stationary installation, it is characterized in that: between Explosion-proof cap, transducer stationary installation, be provided with upper binding head, between transducer stationary installation and transducer holder, be provided with lower union joint; Between Explosion-proof cap and upper binding head, be equipped with O-ring seal between lower union joint and transducer holder; Between transducer stationary installation and upper binding head, be all equipped with polytetrafluoroethylsealed sealed pad between transducer stationary installation and lower union joint, transducer stationary installation is provided with internal-thread spherical valve in stage casing; Between upper binding head and activity adjustment bar, be provided with hermetic seal dynamic pressure zero shape circle, between lower union joint and activity adjustment bar, be provided with lower hermetic seal dynamic pressure zero shape circle.
The hermetically-sealed construction that the present invention proposes forms inside and outside double seal isolation, and outer resealing is made up of Explosion-proof cap, upper binding head, transducer stationary installation, lower union joint and transducer holder and the O-ring seal between them and polytetrafluoroethylsealed sealed pad; Interior resealing is enclosed by the activity adjustment bar in transducer stationary installation and upper binding head, lower union joint and the zero shape circle of the upper hermetic seal dynamic pressure between them, lower hermetic seal dynamic pressure zero shape, also have the internal-thread spherical valve in transducer stationary installation stage casing jointly to form, can realize in the process that activity adjustment bar left or entered transducer stationary installation, ultrasonic flow meter keeps sealing without leaking, therefore claim strong hermetically-sealed construction always.When ultrasonic flow meter normally moves, internal-thread spherical valve is in opening, and activity adjustment bar runs through in the through hole of internal-thread spherical valve.In the time that needs overhaul, safeguard or change transducer, use changes device and takes out or send into activity adjustment bar, coordinate and open or close internal-thread spherical valve simultaneously, just can pull down transducer and place under repair and return dress, ultrasonic flow meter still keeps good sealing property.Therefore can be embodied in line maintenance, safeguard or change transducer, measured pipeline is without stopping the supple of gas or steam.
Brief description of the drawings
Fig. 1 is that ultrasonic flow meter is arranged on working position schematic diagram.
Fig. 2 is the cut-open view of Fig. 1.
Fig. 3 implements on-bne repair, maintenance or changes transducer schematic diagram.
In figure, mark is expressed the meaning: transducer holder 1, ultrasonic transducer 2, O-ring seal 3, ultrasonic transducer stationary installation 4, Explosion-proof cap 5, signal socket connector 6, cable seal filler 7, plain cushion 8, Explosion proof joint 9, cable 10, lower hermetic seal dynamic pressure zero shape circle 11, lower union joint 12, polytetrafluoroethylsealed sealed pad 13, activity adjustment bar 14, internal-thread spherical valve 15, upper hermetic seal dynamic pressure zero shape circle 16, upper binding head 17, changes device 19, dismounting leading screw 20, leading screw support 21, handle 22.
Embodiment
Be described in further detail below in conjunction with embodiments of the invention and accompanying drawing thereof.
Embodiment is as shown in Figure 1 mounted in the ultrasonic flow meter of working position, stationary installation 4 lower ends that are loaded with ultrasonic transducer 2 are connected on transducer holder 1, stationary installation 4 upper ends connect Explosion-proof caps 5, between stationary installation 4 and transducer holder 1, be all provided with O-ring seal 3 between stationary installation 4 and Explosion-proof cap 5.Simultaneously referring to Fig. 2, in stationary installation 4, there is an activity adjustment bar 14, transducer 2 just hangs over activity adjustment bar 14 lower ends, activity adjustment bar 14 upper ends are provided with signal socket connector 6, the cable 10 that connects signal socket connector 6 exports through Explosion-proof cap 5 signal recording, and is from bottom to top provided with successively cable seal filler 7, plain cushion 8 and Explosion proof joint 9 between cable 10 and Explosion-proof cap 5.The present embodiment has been set up upper binding head 17 and lower union joint 12 at the nearly upper and lower two ends of activity adjustment bar 14 places, be wherein threaded Explosion-proof cap 5 and stationary installation 4 of upper binding head 17; Lower union joint 12 be threaded stationary installation 4 and transducer holder 1.Between upper binding head 17 and stationary installation 4, all accompany polytetrafluoroethylsealed sealed pad 13 between lower union joint 12 and stationary installation 4.Between activity adjustment bar 14 and upper binding head 17, be provided with hermetic seal dynamic pressure zero shape circle 16, between activity adjustment bar 14 and lower union joint 12, be provided with lower hermetic seal dynamic pressure zero shape circle 11, described upper hermetic seal dynamic pressure zero shape circle 16 and lower hermetic seal dynamic pressure zero shape circle 11 should respectively arrange twice, can obtain good sealing and equilibrium activity.The present embodiment is provided with internal-thread spherical valve 15 at stationary installation 4 middle parts, and in normal operation, activity adjustment bar 14 interts in the valve opening of internal-thread spherical valve 15; If maintain and replace transducer 2, need to pull out activity adjustment bar 14 time, can cut out internal-thread spherical valve 15 to maintain sealing state.
Simultaneously referring to Fig. 3, the device 19 that changes that the present embodiment uses is made up of a dismounting leading screw 20 and a leading screw support 21, dismounting leading screw 20 is tubular structure, its lower end has internal thread to match with activity adjustment bar 14 upper end external threads, dismounting leading screw 20 peripheries have external thread to match with the screw on leading screw support 21 tops, leading screw support 21 is also tubular structure, its lower end has internal thread to match with the upper end external thread of upper binding head 17, and dismounting leading screw 20 is from the interior screw through top of leading screw support 21.The top generalized case of dismounting leading screw 20 should configure handle 22.
Each maintenance, when safeguarding and changing ultrasonic transducer 2, all use to change device 19 and make activity adjustment bar 14 carry ultrasonic transducer 2 to pass in and out stationary installation 4.
Take out ultrasonic transducer 2: first remove the members that are connected such as Explosion-proof cap 5, cable seal filler 7, plain cushion 8, Explosion proof joint 9 and cable 10; activity adjustment bar 14 and dismounting leading screw 20 are integrated through thread connection; leading screw support 21 is positioned at upper binding head 17 through thread connection; then turning handle 22 is mentioned activity adjustment bar 14 and ultrasonic transducer 2 slowly; due to the sealing function of upper hermetic seal dynamic pressure zero shape circle 16; ensure that the gas in pipeline can not leak; so having ensured does not need to shut down in pipeline, carries out aforesaid operations in the situation of working on.In the time that ultrasonic transducer 2 arrives internal-thread spherical valve 15 top, close internal-thread spherical valve 15, continue to mention activity adjustment bar 14 until take out ultrasonic transducer 2.
The process resetting after maintenance, replacing is as follows:
1, by the ultrasonic transducer 2 that detects, keeps in repair or more finish changing, be fixed on activity adjustment bar 14 lower ends, and activity adjustment bar 14 is integrated through thread connection with dismounting leading screw 20.
2, by the ultrasonic transducer being connected as one 2, activity adjustment bar 14, dismounting leading screw 20, behind leading screw support 21 location, slowly put into upper binding head 17.Rotate dismounting leading screw 20, ultrasonic transducer 2 by upper hermetic seal dynamic pressure zero shape circle 16, enters the top of internal-thread spherical valve 15 with 14 rotations of activity adjustment bar.
3, turn on internal-thread spherical valve 15.Now, due to the sealing function of upper hermetic seal dynamic pressure zero shape circle 16, ensure that the gas in pipeline can not leak, so ensured not need to shut down in pipeline, in the situation of working on, carried out aforesaid operations.
4, continue to rotate dismounting leading screw 20, ultrasonic transducer 2 moves downward continuing with activity adjustment bar 14, until through internal-thread spherical valve 15 and lower hermetic seal dynamic pressure zero shape circle 11, arrive precalculated position.
5, will change device 19 and pull down, and cable 10 and signal socket connector 6 will be connected, load onto Explosion-proof cap 5, then Explosion proof joint 9 is tightened, so far, the process of reassembling finishes.
Claims (3)
1. for the online strong hermetically-sealed construction of changing ultrasonic transducer, comprise Explosion-proof cap, transducer stationary installation, transducer holder and through the activity adjustment bar in transducer stationary installation, it is characterized in that: between Explosion-proof cap, transducer stationary installation, be provided with upper binding head, between transducer stationary installation and transducer holder, be provided with lower union joint; Between Explosion-proof cap and upper binding head, be equipped with O-ring seal between lower union joint and transducer holder; Between transducer stationary installation and upper binding head, be all equipped with polytetrafluoroethylsealed sealed pad between transducer stationary installation and lower union joint, transducer stationary installation is provided with internal-thread spherical valve in stage casing; Between upper binding head and activity adjustment bar, be provided with hermetic seal dynamic pressure zero shape circle, between lower union joint and activity adjustment bar, be provided with lower hermetic seal dynamic pressure zero shape circle.
2. according to claim 1 for the online strong hermetically-sealed construction of changing ultrasonic transducer, it is characterized in that the upper hermetic seal dynamic pressure zero shape circle between upper binding head and activity adjustment bar is provided with twice.
3. according to claim 1 for the online strong hermetically-sealed construction of changing ultrasonic transducer, it is characterized in that the lower hermetic seal dynamic pressure zero shape circle between lower union joint and activity adjustment bar is provided with twice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210561023.0A CN103884390A (en) | 2012-12-21 | 2012-12-21 | Strong sealing device for online replacement of ultrasonic transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210561023.0A CN103884390A (en) | 2012-12-21 | 2012-12-21 | Strong sealing device for online replacement of ultrasonic transducer |
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| Publication Number | Publication Date |
|---|---|
| CN103884390A true CN103884390A (en) | 2014-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210561023.0A Pending CN103884390A (en) | 2012-12-21 | 2012-12-21 | Strong sealing device for online replacement of ultrasonic transducer |
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| Country | Link |
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| CN (1) | CN103884390A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110281203A (en) * | 2019-06-19 | 2019-09-27 | 中铁工程装备集团有限公司 | A kind of normal pressure changes alloy cutter sealing device maintenance replacement tooling and application method |
| CN110702178A (en) * | 2019-10-17 | 2020-01-17 | 山东钢铁集团日照有限公司 | Remote automatic dismounting device for ultrasonic probe of gas pipeline and working method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4742717A (en) * | 1986-09-16 | 1988-05-10 | Kaijo Denki Co., Ltd. | Gas flow rate measuring device |
| CN2392170Y (en) * | 1999-10-25 | 2000-08-16 | 张力新 | Insertion type energy transducer of supersonic flow-meter |
| CN2658719Y (en) * | 2003-11-03 | 2004-11-24 | 邓立群 | Ultrasonic wave transducer capable of on-line installing and maintenance |
| CN2791611Y (en) * | 2005-03-04 | 2006-06-28 | 张力新 | Non-stop-flow seusor maintainable ultrasonic flowmeter |
| CN201058424Y (en) * | 2007-06-28 | 2008-05-14 | 上海维思仪器仪表有限公司 | On-line altering device of ultrasonic transducer |
| CN202041240U (en) * | 2011-05-05 | 2011-11-16 | 重庆市伟岸测器制造股份有限公司 | Installation structure of ultrasonic transducer |
| CN202453123U (en) * | 2012-02-09 | 2012-09-26 | 宋爱群 | Flowmeter barrel structure for ultrasonic heat metering device |
| CN203011447U (en) * | 2012-12-21 | 2013-06-19 | 上海一诺仪表有限公司 | Strong sealing structure for on-line replacement of ultrasonic transducer |
-
2012
- 2012-12-21 CN CN201210561023.0A patent/CN103884390A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4742717A (en) * | 1986-09-16 | 1988-05-10 | Kaijo Denki Co., Ltd. | Gas flow rate measuring device |
| CN2392170Y (en) * | 1999-10-25 | 2000-08-16 | 张力新 | Insertion type energy transducer of supersonic flow-meter |
| CN2658719Y (en) * | 2003-11-03 | 2004-11-24 | 邓立群 | Ultrasonic wave transducer capable of on-line installing and maintenance |
| CN2791611Y (en) * | 2005-03-04 | 2006-06-28 | 张力新 | Non-stop-flow seusor maintainable ultrasonic flowmeter |
| CN201058424Y (en) * | 2007-06-28 | 2008-05-14 | 上海维思仪器仪表有限公司 | On-line altering device of ultrasonic transducer |
| CN202041240U (en) * | 2011-05-05 | 2011-11-16 | 重庆市伟岸测器制造股份有限公司 | Installation structure of ultrasonic transducer |
| CN202453123U (en) * | 2012-02-09 | 2012-09-26 | 宋爱群 | Flowmeter barrel structure for ultrasonic heat metering device |
| CN203011447U (en) * | 2012-12-21 | 2013-06-19 | 上海一诺仪表有限公司 | Strong sealing structure for on-line replacement of ultrasonic transducer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110281203A (en) * | 2019-06-19 | 2019-09-27 | 中铁工程装备集团有限公司 | A kind of normal pressure changes alloy cutter sealing device maintenance replacement tooling and application method |
| CN110281203B (en) * | 2019-06-19 | 2023-11-14 | 中铁工程装备集团有限公司 | Maintenance and replacement tool for normal-pressure alloy-replacement tool sealing device and use method |
| CN110702178A (en) * | 2019-10-17 | 2020-01-17 | 山东钢铁集团日照有限公司 | Remote automatic dismounting device for ultrasonic probe of gas pipeline and working method |
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Application publication date: 20140625 |