CN203705259U - Sealing clamp for internal pressure resistance test of plastics pipe - Google Patents
Sealing clamp for internal pressure resistance test of plastics pipe Download PDFInfo
- Publication number
- CN203705259U CN203705259U CN201320832442.3U CN201320832442U CN203705259U CN 203705259 U CN203705259 U CN 203705259U CN 201320832442 U CN201320832442 U CN 201320832442U CN 203705259 U CN203705259 U CN 203705259U
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- end socket
- socket
- sealing
- sealing clamp
- runddichtringo
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- Withdrawn - After Issue
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Abstract
The utility model discloses a sealing clamp for internal pressure resistance test of a plastics pipe. The sealing clamp comprises a front end socket, a back end socket and a pull rod, wherein the front end socket and the back end socket are elliptic end sockets; connection holes are formed in the centers of the front end socket and the back end socket; the two ends of the pull rod are fixed by using fastening screw caps after respectively penetrating through the connection holes of the front end socket and the back end socket; sealing rings are matched with the fastening screw caps; a quick coupler is arranged on the front end socket; compression rings are connected with the inner end parts of the front end socket and the back end socket through bolts; O-shaped sealing rings are clamped between the front and back end sockets and the compressing rings; arc-shaped grooves matched with the O-shaped sealing rings are formed in the inner end faces of the front end socket and the back end socket; the end faces, which are in contact with the O-shaped sealing rings, the compression rings are inclined planes or arc surfaces. The sealing clamp has the advantages of good leakproofness, light weight, firm structure and convenience in mounting and dismounting even under a bad sealing work condition.
Description
Technical field
The utility model relates to tubing performance testing device field under various pressure, particularly a kind of sealing clamp of the mensuration small size steady state test for the resistance to Rapid Crack of plastic pipe.
Background technology
In the mensuration small size steady state test of the resistance to Rapid Crack of plastic pipe, specimen finish is large, length is large, and in existing sealing means, some fixture is very heavy, and installing/dismounting is all very inconvenient.Test is carried out at low temperatures in addition, and some sealing means is inadequate in low temperature condition seal performance, easily occurs the phenomenon of revealing.The adjusting of sample needs the time longer, if revealed, test figure is cancelled, and loses time etc.Therefore require sealing clamp must facilitate installing/dismounting, be sealed to power and want high.
In the mensuration small size steady state test of the resistance to Rapid Crack of plastic pipe, need to there is decompressing baffle plate to pass sample.Therefore adopt the Type B sealing means mentioned in GB/T6111-2003 (two cover sealing adaptors are positioned over respectively the two ends of sample, the sealing means two cover sealing adaptors being connected by metal connecting link) more for convenience.
Existing Sealing Technology is mainly plough groove type radial seal:
1. plough groove type radial seal: sealing form has two cover sealing adaptors to be positioned over respectively the two ends of sample, and sealing adaptor is all provided with groove, places sealing 0 type circle.The internal diameter of sealing O type circle is more smaller than sample external diameter, and sample will be through sealing O type circle, and the extruding force being produced through O type circle by sample completes sealing.Above-mentioned seal form has following some deficiency: the extruding force of (1) sealing provides through O type circle by sample, when extruding pressure hour, if testing requirements sample internal pressure has more greatly disclosure risk.(2), in the time that extruding force is large, in installation process, need very large strength.But for ensureing stabilized seal, installing/dismounting also can be more painstaking conventionally.(3) want balance both sides relation to seek suitable O type circle.Extremely inconvenient when design alternative O type circle.(4) sealed at both ends joint is smooth type, is proof strength requirement, and the heaviness that sealing adaptor becomes, makes troubles to installing/dismounting.
2. sealing mode also can be used for the withstand voltage explosion bulge test of plastic pipe, and the more advanced mode in this field is plastic pipe pressure-proof bursting test machine folder.Sealing mode belongs to A type sealing means.Sealing form has two cover sealing adaptors and two trim rings to be positioned over sample two ends.Sealing adaptor is provided with step and places O type circle, and sample is through O type circle, and trim ring is connected with screw with sealing adaptor, and by trip bolt, trim ring compression O type circle makes it distortion filling gap and completes sealing.Sealing mode is respond well in the withstand voltage explosion bulge test of pipe with small pipe diameter tubing, but in the withstand voltage explosion bulge test of Large Diameter Pipeline tubing, have following problem: O type ring cross-section diameter and nominal diameter that (1) Large Diameter Pipeline tubing needs all become greatly, therefore will make it distortion needs very large fastening force.The power of artificial trip bolt often can not reach, and causes leakage problem.(2) out-of-roundness of plastic pipe requires more wide in range, become large with caliber, this problem embodies more obvious, because outer pipe wall out-of-roundness is large, sealing adaptor out-of-roundness is little, causes tubing to vary in the gap of sealing adaptor, and the shape matching rule of O-ring seal, be out of shape also more evenly, therefore can not fill up gap not of uniform size, cause leakage problem.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of good airproof performance effectively to solve the sealing clamp of the mensuration small size steady state test for the resistance to Rapid Crack of plastic pipe of leakage problem, sound construction, easy accessibility.
Of the present utility model being achieved through the following technical solutions:
A kind of sealing clamp for the test of plastic pipe internal pressure-resistant, it is characterized in that: described sealing clamp comprises front-end end enclosure, rear end end socket and pull bar, front-end end enclosure and rear end end socket are ellipse end socket, the center of front-end end enclosure and rear end end socket is equipped with connecting hole, the two ends of pull bar are respectively through fixing with fastening blind nut after the connecting hole of front-end end enclosure and rear end end socket, fastening blind nut place is furnished with O-ring seal, front-end end enclosure is provided with ready-packaged joint, inner end at front-end end enclosure and rear end end socket is respectively connected a pressure ring by bolt, before, between rear end end socket and pressure ring, all clamping has O RunddichtringO, before, rear end end socket inner face is provided with the arc groove coordinating with O RunddichtringO, the end face that pressure ring contacts with O RunddichtringO is inclined-plane or arc surface.
Between described two forward and backward pressure rings, be provided with protective cover, protective cover comprises the some annulus with the coaxial setting of pull bar, and it is parallel with pull bar for connecting some connecting links of annulus to be arranged on annulus periphery.
Described pull bar comprises that axle core, interval are coaxially arranged on some round on axle core and are coaxially arranged on the cylinder table of axle core rearward end.
Described O RunddichtringO is to make with red silica gel material.
The utility model, in the time testing installation, first passes rear end end socket connecting hole by pull bar one end, and fixing with fastening blind nut and O-ring seal sealing; Secondly the arc groove place that O RunddichtringO is put into rear end end socket inner face, inserts sample in the end socket of rear end, then is inserted in pressure ring and protective cover (when the hydraulic testing can); Then be inserted in successively pressure ring, O RunddichtringO and front-end end enclosure at the sample other end, use O-ring seal and fastening blind nut by front-end end enclosure fixing seal; Finally adjust the position of O RunddichtringO, make it to be adjacent to end socket arc groove place, pressure ring and end socket are linked together with bolt, and fasteningly complete sealing.
The utlity model has following advantage:
1. front-end end enclosure and rear end end socket are ellipsoidal structure, alleviate clamp weight meeting on requirement of strength basis.
Two ends end socket and O RunddichtringO cooperation place be shaped as circular arc, make full use of the deflection of O RunddichtringO, when the larger O RunddichtringO of caliber tubing deflection hour, still can stabilized seal.
3. pressure ring end and O RunddichtringO contact portion are shaped as inclined-plane or arc surface (sealing operating mode adopt inclined-plane when better, sealing operating mode adopts arc surface when severe), the direction of extrusion of guiding O RunddichtringO is pointed to the gap that will seal, do not fill seal clearance by the deflection of O RunddichtringO merely, also utilize the displacement of O RunddichtringO to carry out seal clearance, greatly improve leakage efficiency, even in the situation that the requirement of plastic pipe out-of-roundness is more wide in range, still can well complete sealing.
4. two ends end socket is connected by pull bar, and fixes and seal with O RunddichtringO and fastening blind nut.The axial force that pressure medium produces is born by pull bar, and sample is not born axial force.
5. while installation, sample can not produce larger pressure by O RunddichtringO, after waiting to assemble, provides sealing load by tightened bolt presses O RunddichtringO, and installing/dismounting is time saving and energy saving.
To sum up, even if the utlity model has under severe sealing operating mode still the advantages such as good airproof performance, lightweight, sound construction, easy accessibility.
Brief description of the drawings
Fig. 1 is that the utility model dissects structural representation;
Fig. 2 is the A place enlarged drawing of Fig. 1.
Embodiment
As Fig. 1, shown in Fig. 2, a kind of sealing clamp for the test of plastic pipe internal pressure-resistant, comprise front-end end enclosure 1, rear end end socket 2 and pull bar 3, front-end end enclosure 1 and rear end end socket 2 are ellipse end socket, the center of front-end end enclosure 1 and rear end end socket 2 is equipped with connecting hole, the two ends of pull bar 3 are respectively through fixing with fastening blind nut 4 after the connecting hole of front-end end enclosure 1 and rear end end socket 2, fastening blind nut 4 places are furnished with O-ring seal 5, front-end end enclosure 1 is provided with ready-packaged joint 6, inner end at front-end end enclosure 1 and rear end end socket 2 is respectively connected a pressure ring 8 by bolt 7, before, between rear end end socket and pressure ring 8, all clamping has O RunddichtringO 9, before, rear end end socket inner face is provided with the arc groove 10 coordinating with O RunddichtringO 9, the end face that pressure ring 8 contacts with O RunddichtringO is inclined-plane, front, after two pressure rings 8 between be provided with protective cover 11.
The utility model, in the time testing installation, first passes rear end end socket 2 connecting holes by pull bar 3 one end, and fixing with fastening blind nut 4 and O-ring seal 5 sealings; Secondly arc groove 10 places that O RunddichtringO 9 put into rear end end socket 2 inner faces, insert sample 12 in rear end end socket 2, then while being inserted in pressure ring 8 and the protective cover 11(hydraulic testing can); Then be inserted in successively pressure ring 8, O RunddichtringO 9 and front-end end enclosure 1 at sample 12 other ends, use O-ring seal 5 and fastening blind nut 4 by front-end end enclosure 1 fixing seal; Finally adjust the position of O RunddichtringO 9, make it to be adjacent to end socket arc groove 10 places, pressure ring 8 and end socket are linked together with bolt 7, and fasteningly complete sealing.
Claims (4)
1. the sealing clamp for the test of plastic pipe internal pressure-resistant, it is characterized in that: described sealing clamp comprises front-end end enclosure, rear end end socket and pull bar, front-end end enclosure and rear end end socket are ellipse end socket, the center of front-end end enclosure and rear end end socket is equipped with connecting hole, the two ends of pull bar are respectively through fixing with fastening blind nut after the connecting hole of front-end end enclosure and rear end end socket, fastening blind nut place is furnished with O-ring seal, front-end end enclosure is provided with ready-packaged joint, inner end at front-end end enclosure and rear end end socket is respectively connected a pressure ring by bolt, before, between rear end end socket and pressure ring, all clamping has O RunddichtringO, before, rear end end socket inner face is provided with the arc groove coordinating with O RunddichtringO, the end face that pressure ring contacts with O RunddichtringO is inclined-plane or arc surface.
2. sealing clamp according to claim 1, it is characterized in that: between described two forward and backward pressure rings, be provided with protective cover, protective cover comprises the some annulus with the coaxial setting of pull bar, and it is parallel with pull bar for connecting some connecting links of annulus to be arranged on annulus periphery.
3. sealing clamp according to claim 1, is characterized in that: described pull bar comprises that axle core, interval are coaxially arranged on some round on axle core and are coaxially arranged on the cylinder table of axle core rearward end.
4. sealing clamp according to claim 1, is characterized in that: described O RunddichtringO is to make with red silica gel material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320832442.3U CN203705259U (en) | 2013-12-11 | 2013-12-11 | Sealing clamp for internal pressure resistance test of plastics pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320832442.3U CN203705259U (en) | 2013-12-11 | 2013-12-11 | Sealing clamp for internal pressure resistance test of plastics pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203705259U true CN203705259U (en) | 2014-07-09 |
Family
ID=51055680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320832442.3U Withdrawn - After Issue CN203705259U (en) | 2013-12-11 | 2013-12-11 | Sealing clamp for internal pressure resistance test of plastics pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203705259U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698206A (en) * | 2013-12-11 | 2014-04-02 | 广州市特种承压设备检测研究院 | Sealing clamp used for internal pressure resistance test of plastic pipe and using method of sealing clamp |
| CN107084894A (en) * | 2017-03-30 | 2017-08-22 | 燕山大学 | A kind of deep-sea oil gas pipeline low temperature explosion bulge test device |
-
2013
- 2013-12-11 CN CN201320832442.3U patent/CN203705259U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698206A (en) * | 2013-12-11 | 2014-04-02 | 广州市特种承压设备检测研究院 | Sealing clamp used for internal pressure resistance test of plastic pipe and using method of sealing clamp |
| CN107084894A (en) * | 2017-03-30 | 2017-08-22 | 燕山大学 | A kind of deep-sea oil gas pipeline low temperature explosion bulge test device |
| CN107084894B (en) * | 2017-03-30 | 2019-06-25 | 燕山大学 | A kind of deep-sea oil gas pipeline low temperature explosion bulge test device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 510663 Luogang District Science City, Guangdong Province, research road, No. 9, No. Patentee after: The extraordinary bearing device in Guangzhou detects research institute Address before: 510663 Luogang District Science City, Guangdong Province, research road, No. 9, No. Patentee before: Guangzhou Special Pressure Equipment Inspection and Research Institute |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20140709 Effective date of abandoning: 20160817 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |