CN201218376Y - Pipe expansion joint - Google Patents
Pipe expansion joint Download PDFInfo
- Publication number
- CN201218376Y CN201218376Y CNU2008201507687U CN200820150768U CN201218376Y CN 201218376 Y CN201218376 Y CN 201218376Y CN U2008201507687 U CNU2008201507687 U CN U2008201507687U CN 200820150768 U CN200820150768 U CN 200820150768U CN 201218376 Y CN201218376 Y CN 201218376Y
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- CN
- China
- Prior art keywords
- joint
- tray
- pipeline
- flange
- pipeline expansion
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a pipeline expansion joint comprising a tray joint, a plug board joint movably plugged in the tray joint, a sealing piece arranged at the plug contact face, and a contraction limit piece and an expansion limit piece respectively arranged at the tray joint and the plug board joint. The pipeline expansion joint has excellent corrosion resistant performance and can accord with the temperature resistant property of a plastic pipeline; and meanwhile, for the sealing piece is utilized, the combination of the tray joint and the plug board joint is more compact so that the sealing effect is enhanced; in addition, for a stepped guiding flange and a threaded guiding stud are utilized as adjustable expansion limit pieces, the expansion within a pretty wide range can be achieved without unplugging the plug board joint from the tray joint.
Description
Technical field
The utility model relates to a kind of assembling pipe joint, specifically, is a kind of pipeline expansion joint.
Background technique
Baosteel Branch's 2030 unit acidic and alkaline waste water main pipes are the PP plastic pipe, are used to discharge acidic and alkaline waste water, and the acidic and alkaline waste water temperature that this regional user discharges is higher, at 50 ℃-60 ℃; The thermal expansion coefficient of PP plastic tube is relatively big; User's intermittent discharge causes that the waste water pressure, temperature variation is frequent in the pipeline in addition, causes the pipeline string moving and flexible frequent.
For solving the problem of expanding with heat and contract with cold of pipeline, on this section waste pipe expansion joint has been installed, this kind expansion joint is an imported product, as Fig. 1, shown in 2.This kind expansion joint A stretchability is better, but in the higher acid waste water pipeline of 50-60 ℃ of temperature, and under the frequent flexible situation, working life is shorter, shows as corrugated regions and fatigue fracture occurs, the general life-span is about 3 years, in addition, import equipment procurement cycle is long, the price height, though domestic similar expansion joint price is lower, the life-span is shorter.In case it is badly damaged to expand joint, the serious consequence that will cause main production line to shut down.
By retrieval, the most close with the utility model technology plastic pipe slip joint situation is as follows:
Retrieval one: Chinese patent notification number: CN2581783, title: telescopic section specially for non-metal pipeline, mainly solve the technical problem of the tubing distortion that nonmetal pipeline owing to expand with heat and contract with cold caused, an end of expansion piece is the riffled tube interface on structural design, the other end is that nonmetal tubing is imported and exported, inwall in nonmetal tubing is imported and exported has the annular seal Baltimore groove, seal ring is positioned at the annular seal Baltimore groove, and the tube wall that is positioned at the annular seal Baltimore groove is the nonmetal tubing wall that freely stretches.Nonmetal tubing is when meeting thermal expansion or meeting cold contraction, and this tubing can freely stretch in slip joint, and its extending amount can change in the scope of broad.But because adopting, this patent is threaded, the pipeline that general only suitable bore is little (≤DN150); And slip joint tray joint is not corrosion-resistant, the pipeline of the Korrosionsmedium that can not be used for circulating; Slip joint does not have maximal dilation spacing, can not be used for pressure piping (as shown in Figure 3), and wherein 1 is the riffled tube interface, 2 end into platform for annular, and 3 is expansion piece, and 4 is tube wall, 5 is the annular seal Baltimore groove, and 6 is the zigzag fashion seal ring, and 7 is that nonmetal tubing is imported and exported.
Retrieval two: Chinese patent notification number: CN2474883, title: a kind of plastic lined piping slip joint, comprise telescopic body, fastening cover, tray joint and seal ring, one end of telescopic body is sleeved in the tray joint and by fastening cover and connects, seal ring is arranged in the seal groove that the telescopic body outer wall protrudes and with the tray inner nosepiece wall and is sealed and matched, seal ring is the dynamic expansive force seal rings of lips, its section forms V-shaped groove, on the telescopic body outer wall of seal ring inboard, locating slot is set simultaneously, is provided with " O " RunddichtringO in the locating slot.The seal groove that this patent is provided with at slip joint and the fastening cover of locating slot and outside are when mounted, concentricity requirement to the two ends connecting tube of slip joint is very high, otherwise, to cause between slip joint and the fastening cover, produce friction or stuck between seal groove and the locating slot, can not play the function of freely stretching; Slip joint tray joint is not corrosion-resistant, the pipeline of the Korrosionsmedium that can not be used for circulating; Disintegrating, change inconvenient (as shown in Figure 4) 1 is telescopic body wherein, and 2 is fastening cover, and 3 is body, and 4 is seal ring, and 5 is seal groove, and 7 is locating slot, and 8 is seal ring.
The model utility content
The purpose of this utility model provides a kind of pipeline expansion joint, and it can have bigger extending amount, can increase the service life, and processing and fabricating is simple, easy accessibility, and with low cost.50-60 ℃ of high-temperature acid alkali waste water can be born, the pressure of frequent flexible and pipeline internal medium can be tackled.
The technical solution of the utility model is: a kind of pipeline expansion joint, comprise the tray joint, activity is plugged on the slotting dish joint in the tray joint, and the grafting surface of contact is provided with Sealing, is provided with one and shrinks a bounding means and an elongation bounding means on this tray joint and slotting dish joint.When the pipeline that connects is flexible, do relative movement between the slotting dish joint of pipeline expansion joint and the tray joint, the axial distance of pipeline expansion joint is changed, with expanding with heat and contract with cold of compensation pipeline.At the tray joint with insert to be provided with above the dish joint and shrink flexible effective limit that bounding means and elongation bounding means can the controlling plumbing fixtures slip joints.
Preferably, described contraction bounding means is a step, is arranged to insert on the dish joint, and this step is minimum dimension spacing of slip joint.
Preferably, described tray joint is connected a pipe neck by a pair of flange seal respectively with slotting dish joint outer end, this is a guide flange in the flange one of them, described elongation bounding means is a double end guide blot, on its end stop nut is installed, this guide blot penetrates in the pilot hole of guide flange.
Preferably, one of them flange and tray joint are one-body molded.
Preferably, one of them flange is one-body molded with slotting dish joint.
Preferably, the pilot hole on the described guide flange is 3, and the quantity of described double end guide blot also is 3.
Preferably, the Sealing between described tray joint and the slotting dish joint is the Type B seal ring.Tray joint and Type B seal ring are relatively-stationary, insert between dish joint and the Type B seal ring and produce the sliding friction campaign because having certain magnitude of interference.
Preferably, described tray joint and slotting dish joint are nonmetallic material.
Preferably, described tray joint is a glass fibre reinforced plastics.
Preferably, described slotting dish joint is the PP plastic tube.
The utility model compared with prior art has following beneficial effect:
1. the utility model adopts the spacing link of double end guide blot as adjustable and retractable, the slotting dish joint that makes pipeline expansion joint is under the prerequisite of not throwing off the tray joint, stretching in realizing in a big way, thereby the flexible limit of effectively having regulated pipeline expansion joint.
2. owing to adopt Sealing, make the tray joint combine closelyr between the joint with inserting to coil, strengthened sealing effect.
3. main material of the present utility model is PP plastic tube and a glass fibre reinforced plastics with low cost, in the time of in the pipeline that is in the circulation Korrosionsmedium, can bear 50-60 ℃ of high-temperature acid alkali waste water, have excellent corrosion resisting performance, and can be consistent with the heat resistance of plastic pipe.
4. it is simple to the utlity model has processing and fabricating, easy accessibility, characteristics with low cost, that the life-span is long.
Description of drawings
Fig. 1 is the schematic representation of the expansion joint installed on the prior art waste pipe.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the schematic representation of prior art telescopic section specially for non-metal pipeline.
Fig. 4 is the schematic representation of a kind of plastic lined piping slip joint of prior art.
Fig. 5 is an embodiment's of the utility model a structural representation.
Fig. 6 is an embodiment's of the utility model a link guide flange schematic representation.
Fig. 7 is an embodiment's of the utility model a seal ring section part enlarged diagram.
Embodiment
An embodiment of the present utility model as shown in Figure 5 and Figure 6, a kind of pipeline expansion joint comprises tray joint 1, inserts dish joint 2, " B " RunddichtringO 3.In the present embodiment, the material of tray joint 1 and slotting dish joint 2 is nonmetallic material, and tray joint 1 is a glass fibre reinforced plastics, and inserting dish joint 2 is the PP plastic tube, in the pipeline that is in the circulation Korrosionsmedium, can bear 50-60 ℃ of high-temperature acid alkali waste water.The material of " B " RunddichtringO 3 is a nitrile rubber.
Insert 2 activities of dish joint and be plugged in the tray joint 1, be provided with " B " RunddichtringO 3 in the seal groove 5 of tray joint 1, as shown in Figure 7, seal groove 5 is a smooth surface, and " B " RunddichtringO 3 is caused damage hardly, and relative position is fixed between the two.Sealing circle 3 contacts with the telescopic section excircle 4 of inserting dish joint 2 simultaneously, pipeline expansion joint is played seal action, and produce the sliding friction campaign because of having certain magnitude of interference between the two.
Also being provided with one and shrinking bounding means on slotting dish joint 2, is step 6 in the present embodiment, and this step 6 is spacing as slip joint minimum dimension distance, the contract by distance of restriction conduit slip joint.
The working procedure of present embodiment is as follows:
When the pipeline that is connected was flexible, the tray joint 1 of pipeline expansion joint and insert between the dish joint 2 and will do relative movement changed the axial distance of pipeline expansion joint and compensates expanding with heat and contract with cold of pipeline.Between the step surface of step 6 and tray joint 1 interior edge face, can set in advance a distance, spacing as slip joint minimum dimension distance.The overall dimensions distance of pipeline expansion joint is then regulated control by two end nuts 13 on three double end guide blots 9 and two guide flanges 8, and guide flange 8 play the guiding role.9 upper cap nuts 13 of double end guide blot are placed flexible desired location, and guide flange 8 can move to drive on double end guide blot 9 inserts dish joint 2, makes slotting dish joint 2 flexible back and forth in tray joint 1.
Claims (10)
1. a pipeline expansion joint comprises the tray joint, and activity is plugged on the slotting dish joint in the tray joint, and the grafting surface of contact is provided with Sealing, it is characterized in that: be provided with one and shrink a bounding means and an elongation bounding means on this tray joint and slotting dish joint.
2. pipeline expansion joint as claimed in claim 1 is characterized in that: described contraction bounding means is a step, is arranged to insert on the dish joint.
3. pipeline expansion joint as claimed in claim 2, it is characterized in that: described tray joint is connected a pipe neck by a pair of flange seal respectively with slotting dish joint outer end, this is a guide flange in the flange one of them, described elongation bounding means is a double end guide blot, on its end stop nut is installed, this guide blot penetrates in the pilot hole of guide flange.
4. pipeline expansion joint as claimed in claim 3 is characterized in that: one of them flange and tray joint are one-body molded.
5. pipeline expansion joint as claimed in claim 3 is characterized in that: one of them flange is one-body molded with slotting dish joint.
6. as claim 4 or 5 described pipeline expansion joints, it is characterized in that: the pilot hole on the described guide flange is 3, and the quantity of described double end guide blot also is 3.
7. pipeline expansion joint as claimed in claim 6 is characterized in that: described tray joint and the Sealing of inserting between the dish joint are the Type B seal ring.
8. pipeline expansion joint as claimed in claim 7 is characterized in that: described tray joint and slotting dish joint are nonmetallic material.
9. pipeline expansion joint as claimed in claim 8 is characterized in that: described tray joint is a glass fibre reinforced plastics.
10. pipeline expansion joint as claimed in claim 9 is characterized in that: described slotting dish joint is the PP plastic tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201507687U CN201218376Y (en) | 2008-07-10 | 2008-07-10 | Pipe expansion joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201507687U CN201218376Y (en) | 2008-07-10 | 2008-07-10 | Pipe expansion joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201218376Y true CN201218376Y (en) | 2009-04-08 |
Family
ID=40541211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201507687U Expired - Fee Related CN201218376Y (en) | 2008-07-10 | 2008-07-10 | Pipe expansion joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201218376Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996950A (en) * | 2012-12-06 | 2013-03-27 | 大耐泵业有限公司 | Flexible rotating retractable pipe joint |
| CN103244771A (en) * | 2013-05-24 | 2013-08-14 | 中建五局工业设备安装有限公司 | Butt joint device of expansion joint of drain pipe |
| CN104960847A (en) * | 2015-06-26 | 2015-10-07 | 江苏江达机械制造有限公司 | Double-air-cushion conveyor middle section expansion joint adjusting device |
-
2008
- 2008-07-10 CN CNU2008201507687U patent/CN201218376Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996950A (en) * | 2012-12-06 | 2013-03-27 | 大耐泵业有限公司 | Flexible rotating retractable pipe joint |
| CN102996950B (en) * | 2012-12-06 | 2016-04-27 | 大耐泵业有限公司 | Flexible rotating expansion pipe joint |
| CN103244771A (en) * | 2013-05-24 | 2013-08-14 | 中建五局工业设备安装有限公司 | Butt joint device of expansion joint of drain pipe |
| CN104960847A (en) * | 2015-06-26 | 2015-10-07 | 江苏江达机械制造有限公司 | Double-air-cushion conveyor middle section expansion joint adjusting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090408 Termination date: 20160710 |