CN102538915A - Pulley pneumatic expansion joint - Google Patents
Pulley pneumatic expansion joint Download PDFInfo
- Publication number
- CN102538915A CN102538915A CN2011104540433A CN201110454043A CN102538915A CN 102538915 A CN102538915 A CN 102538915A CN 2011104540433 A CN2011104540433 A CN 2011104540433A CN 201110454043 A CN201110454043 A CN 201110454043A CN 102538915 A CN102538915 A CN 102538915A
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- China
- Prior art keywords
- cylinder body
- pulley
- expansion joint
- draw
- expansion bend
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Abstract
The invention relates to a pulley pneumatic expansion joint, belonging to the technical field of pipeline measuring. The pulley pneumatic expansion joint comprises a sleeve expansion joint cylinder body, an expansion pipe in the cylinder body and an O-shaped seal ring between an expansion joint pipe and cylinder body, wherein three central supports are respectively uniformly arranged on the outer circumferences at the two ends of the expansion joint cylinder, and riding wheels in the central supports are inserted into the cylinder body to be contacted with the expansion pipe. In the pulley pneumatic expansion joint provided by the invention, at least three central supports are respectively uniformly arranged at the two ends of the cylinder body, concentricity is high and tightness is good, the expansion pipe can not sink, and the expansion pipe is not contacted with the cylinder body, thus grinding phenomenon is avoided. The O-shaped seal ring can not be crushed, and no water leakage or air leakage phenomenon is caused, thus the whole calibrating device is perfect. The pulley pneumatic expansion joint provided by the invention has simple structure and is convenient to operate.
Description
Technical field
The invention belongs to the duct survey technical field, particularly relate to the pneumatic expansion bend of a kind of pulley-type.
Technical background
Existing pneumatic expansion bend, its draw-tube sealing are to lean on the sealing of 0 type circle, and the weight of draw-tube also is by 0 type circle holder, because large-scale pneumatic expansion bend draw-tube is heavy, presses 0 type circle partially easily, causes the gas leak phenomenon that leaks, and causes and can't examine and determine flow instrument; And because 0 type circle modification causes draw-tube to sink, draw-tube and cylinder body join to and cause grinding phenomenon together, and draw-tube can't be stretched.
Summary of the invention
To the technical matters of above-mentioned existence, the present invention provides a kind of pulley-type pneumatic expansion bend, and it makes draw-tube not contact with cylinder body through the draw-tube supporting bracket is set, and avoids both to grind.
To achieve these goals, the technical scheme of the present invention's employing is:
The draw-tube that the present invention includes in telescopic device cylinder body, the cylinder body reaches the O RunddichtringO between flexible organ pipe and cylinder body; Along evenly being provided with at least 3 center bearing brackets respectively on the excircle of said expansion bend cylinder body two ends, support roller stretches in the cylinder body and contacts with draw-tube in the said center bearing bracket.
Preferred version of the present invention is: along evenly being provided with 4 center bearing brackets respectively on the excircle of said expansion bend cylinder body two ends.
Center bearing bracket according to the invention comprises support roller, tugboat axle, roller frame and bearing, and on the tugboat axle that passes roller frame, support roller one end stretches out roller frame to support roller through Bearing Installation, contacts with the draw-tube outer wall during work, locks through lock pin at the tugboat axle head.Described roller frame is the support that has open recess, and said support roller places in the open recess.
Beneficial effect of the present invention is:
The present invention supports through 3 center bearing brackets that are uniformly distributed with respectively that are arranged on the cylinder body two ends at least, good concentricity not only, and good airproof performance can not cause draw-tube to sink, and draw-tube is not contacted with cylinder body, has avoided the generation of grinding phenomenon.So just can not damage 0 type circle by pressure, can not cause the gas leak phenomenon that leaks, make whole calibrating installation perfect.The present invention is simple in structure, and behaviour does conveniently.
Center bearing bracket of the present invention contacts with draw-tube through support roller, between be that periphery contacts, it is little to wear and tear.Long service life.
Description of drawings
Fig. 1 is the structural representation that partly cuts open of the present invention.
Fig. 2 be Fig. 1 along the centre frame partial sectional view.
Fig. 3 is the I portion enlarged diagram of Fig. 2.
Among the figure: 1. supporting-roller shaft, 2. roller frame, 3. bearing, 4. support roller, 5. cylinder body, 6. draw-tube, 7. center bearing bracket, 8.O RunddichtringO.
Embodiment
According to accompanying drawing and embodiment the present invention is elaborated below.
Embodiment: as shown in Figure 1; The present invention includes the O RunddichtringO 8 of 5 of draw-tubes 6 and flexible organ pipe 6 and cylinder bodies in the telescopic device cylinder body 5, cylinder body 5; (these routine two ends are respectively selected 4 for use along evenly being provided with at least 3 center bearing brackets 7 respectively on the said expansion bend cylinder body 5 two ends excircles; Support more firm), support roller 4 stretches in the cylinder body 5 and contacts with draw-tube 6 in the said center bearing bracket 7.
Said center bearing bracket 7 comprises support roller 4, supporting-roller shaft 1, roller frame 2 and bearing 3; Support roller 4 is installed on the tugboat axle 1 that passes roller frame 2 through bearing 3; Support roller 4 one ends stretch out roller frame 2, contact with draw-tube 6 outer walls during work, lock through lock pin at tugboat axle 1 end.
Described roller frame 2 is for having the support of open recess, and said support roller 4 places in the open recess.
The present invention in use; Center bearing bracket 7 is welded on the cylinder body 5 two ends circumference of expansion bend; These routine cylinder body 5 two ends respectively are provided with 4 such 8 center bearing brackets 7 the center of draw-tube 6 holders at cylinder body 5; Guarantee the concentricity of draw-tube 6 and cylinder body 5, can not cause draw-tube 6 to sink to pressing, just can not cause the gas leak phenomenon that leaks less than 0 type circle 8.
Claims (4)
1. pneumatic expansion bend of pulley-type; Comprise that the draw-tube in telescopic device cylinder body, the cylinder body reaches the O RunddichtringO between flexible organ pipe and cylinder body; It is characterized in that: along evenly being provided with at least 3 center bearing brackets respectively on the excircle of said expansion bend cylinder body two ends, support roller stretches in the cylinder body and contacts with draw-tube in the said center bearing bracket.
2. the pneumatic expansion bend of pulley-type according to claim 1 is characterized in that: along evenly being provided with 4 center bearing brackets respectively on the excircle of said expansion bend cylinder body two ends.
3. the pneumatic expansion bend of pulley-type according to claim 1 and 2; It is characterized in that: said center bearing bracket comprises support roller, tugboat axle, roller frame and bearing; Support roller through Bearing Installation on the tugboat axle that passes roller frame; Support roller one end stretches out roller frame, contacts with the draw-tube outer wall during work, locks through lock pin at the tugboat axle head.
4. the pneumatic expansion bend of pulley-type according to claim 3 is characterized in that: described roller frame is the support that has open recess, and said support roller places in the open recess.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110454043.3A CN102538915B (en) | 2011-12-30 | 2011-12-30 | Pulley pneumatic expansion joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110454043.3A CN102538915B (en) | 2011-12-30 | 2011-12-30 | Pulley pneumatic expansion joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102538915A true CN102538915A (en) | 2012-07-04 |
| CN102538915B CN102538915B (en) | 2014-04-09 |
Family
ID=46346382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110454043.3A Active CN102538915B (en) | 2011-12-30 | 2011-12-30 | Pulley pneumatic expansion joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102538915B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201247093Y (en) * | 2008-08-11 | 2009-05-27 | 鞍钢股份有限公司 | Reducing casing tube for water flow standard apparatus |
| CN201464001U (en) * | 2009-04-03 | 2010-05-12 | 山西太钢不锈钢股份有限公司 | Calibrating device of float flowmeter |
| CN102072756A (en) * | 2010-12-03 | 2011-05-25 | 丹东意邦计量仪器仪表有限公司 | Front and rear rotating disk type straight pipe section device of flow standard device |
| CN202092744U (en) * | 2011-06-18 | 2011-12-28 | 新乡航空工业(集团)有限公司 | Meter clamping mechanism for flow standard device |
| CN202453055U (en) * | 2011-12-30 | 2012-09-26 | 丹东意邦计量仪器仪表有限公司 | Internal support type pneumatic extension joint |
-
2011
- 2011-12-30 CN CN201110454043.3A patent/CN102538915B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201247093Y (en) * | 2008-08-11 | 2009-05-27 | 鞍钢股份有限公司 | Reducing casing tube for water flow standard apparatus |
| CN201464001U (en) * | 2009-04-03 | 2010-05-12 | 山西太钢不锈钢股份有限公司 | Calibrating device of float flowmeter |
| CN102072756A (en) * | 2010-12-03 | 2011-05-25 | 丹东意邦计量仪器仪表有限公司 | Front and rear rotating disk type straight pipe section device of flow standard device |
| CN202092744U (en) * | 2011-06-18 | 2011-12-28 | 新乡航空工业(集团)有限公司 | Meter clamping mechanism for flow standard device |
| CN202453055U (en) * | 2011-12-30 | 2012-09-26 | 丹东意邦计量仪器仪表有限公司 | Internal support type pneumatic extension joint |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102538915B (en) | 2014-04-09 |
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