CN211340381U - Bellows sealing device at fixed end of extrusion anchor - Google Patents
Bellows sealing device at fixed end of extrusion anchor Download PDFInfo
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- CN211340381U CN211340381U CN201922198466.8U CN201922198466U CN211340381U CN 211340381 U CN211340381 U CN 211340381U CN 201922198466 U CN201922198466 U CN 201922198466U CN 211340381 U CN211340381 U CN 211340381U
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Abstract
The utility model discloses an extrusion anchorage device fixed end bellows sealing device, including bellows, sealed tube and play thick liquid pipe, the left end cover of sealed tube is outside the end of bellows, and the right-hand member of sealed tube seals and is equipped with the spacing pipe that is used for the steel strand wires to wear out, and the lower extreme that goes out the thick liquid pipe stretches into in the sealed tube, and lies in between the end of bellows and the spacing pipe, is equipped with the sealing washer between the left end of sealed tube and the bellows, seals through sealed glue between spacing pipe and the steel strand wires; carry out the sealed between bellows end and the steel strand wires through sealed tube, sealing washer and sealed glue, and need not to fill the foamed rubber, easy operation, the leakproofness is good, and the problem that the foamed rubber blockked up out the thick liquid pipe can not appear.
Description
Technical Field
The utility model relates to a prestressing force engineering technical field especially relates to an extrusion ground tackle stiff end bellows sealing device.
Background
In modern urban traffic networks, cast-in-place prestressed concrete beam bridges are often required to be built due to the requirements on line shape, attractiveness and function. In the design of a cast-in-place prestressed concrete beam bridge, a single-end tensioning mode is generally adopted for tensioning prestressed steel strands, and an extrusion anchorage device is generally adopted at a fixed end.
In the work progress, in the bellows that concrete got into extrusion ground tackle stiff end when avoiding the pouring concrete, need strictly sealed between extrusion ground tackle stiff end bellows and steel strand wires, simultaneously for can be after the tension steel strand wires to impressing grout smoothly in the bellows, in order to utilize grout to fill up the gap between bellows and the steel strand wires, and then prevent steel strand wires corrosion in the bellows and transmit prestressing force to concrete structure through the cement slurry body after condensing, need insert the play thick liquid pipe with external intercommunication in the extrusion ground tackle stiff end bellows. The traditional sealing method is to fill foam rubber (polyurethane foam joint mixture) between a corrugated pipe at the fixed end of an extrusion anchor and a steel strand, and the sealing method has the following problems: if the slurry outlet pipe is inserted too short, the foam adhesive can easily enter the slurry outlet pipe to cause blockage, and the subsequent pressing-in of the cement slurry is influenced; if the grout outlet pipe is excessively inserted, the grouting of the end head of the corrugated pipe at the fixed end is not full when the cement grout is pressed in; the density of the foam rubber sealing section is not enough, so that moisture is easy to invade, the corrosion of the prestressed steel strand is caused, the effective area of the prestressed steel strand is reduced, the limit bearing capacity of the bridge is reduced, and the structural safety of the bridge is influenced.
Therefore, the corrugated pipe sealing device at the fixed end of the extrusion anchor is good in sealing performance and does not affect the grouting effect in the corrugated pipe, and the technical problem to be solved by technical personnel in the field is solved at present.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an extrusion ground tackle stiff end bellows sealing device, simple structure, the leakproofness is good, does not influence the intraductal mud jacking of follow-up bellows.
For solving the technical problem, the utility model provides an extrusion ground tackle stiff end bellows sealing device, including bellows, sealed tube and play thick liquid pipe, the left end cover of sealed tube is in outside the end of bellows, the right-hand member of sealed tube seals and is equipped with the spacing pipe that is used for steel strand wires to wear out, the lower extreme that goes out the thick liquid pipe stretches into in the sealed tube, and is located the end of bellows with between the spacing pipe, the left end of sealed tube with be equipped with the sealing washer between the bellows, spacing pipe with seal through sealed glue between the steel strand wires.
Preferably, the sealant is a two-component polysulfide sealant or a silicone adhesive.
Preferably, a sealing tape is wound around a joint of the left end of the sealing tube and the corrugated tube.
Preferably, the inner diameter of the sealing tube is equal to the outer diameter of the bellows.
Preferably, the wall thickness of the sealing tube is not less than 1/50 and not less than 2mm of its inner diameter.
Preferably, the grout outlet pipe is vertically arranged, and the lower end of the grout outlet pipe is in threaded connection with the sealing pipe.
Preferably, the length of the slurry outlet pipe extending into the sealing pipe is equal to the wall thickness of the corrugated pipe.
Preferably, the slurry outlet pipe further comprises a restraining ring sleeved outside the right end of the sealing pipe, and the lower end of the slurry outlet pipe is located between the end of the corrugated pipe and the restraining ring.
Preferably, the length of the part of the sealing pipe on the right side of the slurry outlet pipe is equal to that of the restraining ring, and the length of the part on the left side of the slurry outlet pipe is not less than 150mm and not more than 200 mm.
Preferably, still include positioning bar and spiral muscle, go out the thick liquid pipe with positioning bar welded connection, the spiral muscle cover outside the positioning bar and with positioning bar spot welding or ligature are fixed.
The utility model provides an extrusion ground tackle stiff end bellows seal device, including bellows, sealed tube and play thick liquid pipe, the left end cover of sealed tube is outside the end of bellows, and the right-hand member of sealed tube seals and is equipped with the spacing pipe that is used for steel strand wires to wear out, and the lower extreme that goes out the thick liquid pipe stretches into in the sealed tube, and is located between the end of bellows and the spacing pipe, is equipped with the sealing washer between the left end of sealed tube and the bellows, seals through sealed glue between spacing pipe and the steel strand wires.
During specific installation, the sealing ring can be sleeved at the left end of the sealing pipe firstly, the grout outlet pipe is fixed on the sealing pipe, then the whole bundle of prestressed steel strands to be extruded passes through the sealing pipe and penetrates out through the limiting pipe, then the anchor plate is passed through, then an extrusion anchor is installed on the prestressed steel strands, after the whole bundle of prestressed steel strands is extruded through the extrusion anchor, the whole bundle of prestressed steel strands penetrates into the corrugated pipe, the corrugated pipe penetrates into the sealing pipe, the sealing pipe and the anchor plate are fixed by adjusting the position, then the sealing ring at the left end of the sealing pipe is rolled between the corrugated pipe and the sealing pipe, and a gap between the limiting pipe at the right end of the sealing pipe and the steel strands is filled with sealant, so that sealing between the corrugated pipe and the steel strands is realized, and cement grout is effectively prevented from entering the corrugated pipe when concrete is. In addition, foam rubber does not need to be filled between the fixed end corrugated pipe and the steel strand, so that the problem that the slurry outlet pipe is blocked by the foam rubber is avoided.
After concrete pouring is finished and certain strength is achieved, the prestressed steel strands are tensioned, cement paste is pressed into the corrugated pipe from the tensioning end of the corrugated pipe, and in the process, air, water and the like in the corrugated pipe are discharged through the grout outlet pipe, so that grouting in the corrugated pipe can be full.
Drawings
Fig. 1 is a schematic structural view of an embodiment of a sealing device for a bellows at a fixed end of an extrusion anchor according to the present invention;
FIG. 2 is a side view of one embodiment of a gland provided by the present invention;
fig. 3 is an enlarged schematic view of the joint between the bellows and the sealing tube provided by the present invention.
The drawings are numbered as follows:
the device comprises a corrugated pipe 1, a sealing ring 2, a sealing adhesive tape 2-1, a sealing pipe 3, a slurry outlet pipe 4, a positioning steel bar 4-1, a spiral bar 4-2, a restraining ring 5, a limiting pipe 6, a sealant 7, a steel strand 8, an anchor plate 9 and an extrusion anchor 10.
Detailed Description
The utility model discloses a core provides an extrusion ground tackle stiff end bellows sealing device, simple structure, and the leakproofness is good, does not influence the intraductal mud jacking of follow-up bellows.
In order to make the technical field better understand the solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and the detailed description.
Referring to fig. 1 to 3, fig. 1 is a schematic structural view of an embodiment of a sealing device for a bellows at a fixed end of an extrusion anchor according to the present invention; FIG. 2 is a side view of one embodiment of a gland provided by the present invention; fig. 3 is an enlarged schematic view of the joint between the bellows and the sealing tube provided by the present invention.
The utility model provides a bellows sealing device at fixed end of extrusion anchor, mainly include bellows 1, sealed tube 3 and play thick liquid pipe 4, the left end cover of sealed tube 3 is outside the end of bellows 1, the right-hand member of sealed tube 3 seals and is equipped with spacing pipe 6 that is used for steel strand wires 8 to wear out, the lower extreme of play thick liquid pipe 4 stretches into in the sealed tube 3, and be located between the end of bellows 1 and the spacing pipe 6, be equipped with sealing washer 2 between the left end of sealed tube 3 and the bellows 1, it is sealed through sealed glue 7 between spacing pipe 6 and the steel strand wires 8.
Specifically, the sealant 7 may be a two-component polysulfide sealant or a silicone adhesive, which has strong adhesion, weather resistance, vibration resistance, water resistance, and large adaptability to changes in temperature and humidity, and may be other types of sealants 7, which is not limited in this application.
It should be noted that, the right-hand member of sealed tube 3 is sealed, and the right-hand member of sealed tube 3 can have the limiting plate to seal through the limiting plate, a plurality of limiting tubes 6 are established in the outside of limiting plate, and sealed tube 3, the preferred integrated into one piece of limiting plate and limiting tube 6, in addition for making things convenient for penetrating of steel strand wires 8, the length that limiting tube 6 extends to the outside is not less than 20mm and is not more than 40 mm.
When in installation, the sealing ring 2 can be sleeved at the left end of the sealing tube 3, the slurry outlet tube 4 is fixed on the sealing tube 3, then the whole bundle of prestressed steel strands 8 at the end to be extruded passes through the sealing tube 3, passes through the limiting tube 6, passes through the anchor plate 9, then an extrusion anchorage device 10 is arranged on the prestressed steel strand 8, after the whole bundle of prestressed steel strand 8 is extruded by the extrusion anchorage device 10, the whole bundle penetrates into the corrugated pipe 1, the corrugated pipe 1 is penetrated into the sealing pipe 3, the sealing pipe 3 and the anchor plate 9 are fixed by adjusting the position, then stripping the sealing ring 2 at the left end of the sealing tube 3 to the position between the corrugated tube 1 and the sealing tube 3, filling the sealing glue 7 in the gap between the limiting tube 6 at the right end of the sealing tube 3 and the steel strand 8, and then realize the sealed between bellows 1 and steel strand wires 8 to effectively prevent that grout from getting into bellows 1 when the concrete is poured. In addition, foam rubber does not need to be filled between the fixed end corrugated pipe 1 and the steel strand 8, so that the problem that the slurry outlet pipe 4 is blocked by the foam rubber is avoided.
After concrete pouring is finished and certain strength is achieved, the steel strand 8 is tensioned, cement paste is pressed into the corrugated pipe from the tensioning end of the corrugated pipe 1, air, water and the like in the corrugated pipe 1 are discharged through the grout outlet pipe 4 in the process, and the pressure paste in the corrugated pipe 1 can be full.
Furthermore, the utility model provides an extrusion ground tackle stiff end bellows sealing device, after putting sealing washer 2 between 3 left ends of sealed tube and bellows 1, can reuse sealed sticky tape 2-1 winding several rings to increase the leakproofness.
Wherein, for easy installation and improved sealing, the inner diameter of the sealing tube 3 is preferably equal to the outer diameter of the corrugated tube 1.
To ensure structural strength, the wall thickness of the gland 3 is not less than 1/50 mm, and not less than 2 mm.
On the basis of each above-mentioned embodiment, the utility model provides an extrusion ground tackle stiff end bellows sealing device, the preferred vertical setting of play thick liquid pipe 4 during the mud jacking, more is favorable to air escape in bellows 1, changes and makes 1 end mud jacking of bellows plump.
Specifically, go out the lower extreme and the 3 threaded connection of sealed tube of thick liquid pipe 4, process out the internal thread on sealed tube 3, process out external screw thread at play thick liquid pipe 4 lower extreme, threaded connection is simple reliable, goes out the length that thick liquid pipe 4 stretched into in the sealed tube 3 and controls easily.
Further, when the slurry outlet pipe 4 is connected with the sealing pipe 3, the length of the slurry outlet pipe 4 extending into the sealing pipe 3 is preferably equal to the wall thickness of the corrugated pipe 1, so that when the corrugated pipe 1 is connected with the sealing pipe 3, the situation that the slurry outlet pipe 4 cannot discharge slurry due to the fact that the corrugated pipe 1 penetrates through the slurry outlet pipe 4 can be effectively prevented.
On the basis of each above-mentioned specific embodiment, the utility model provides an extrusion ground tackle stiff end bellows sealing device can also overlap at the 3 right-hand members of sealed tube and have restraint circle 5, and restraint circle 5 specifically can be connected with sealed tube 3 spot welding, and the internal diameter of restraint circle 5 is preferred to be equal to the external diameter of sealed tube 3, establishes the lower extreme of play thick liquid pipe 4 between the end of bellows 1 and restraint circle 5 simultaneously, utilizes restraint circle 5 to restrict the position of play thick liquid pipe 4.
Specifically, the length of the part of the sealing tube 3 on the right side of the grout outlet tube 4 is equal to the length of the restraining ring 5, so that after the grout outlet tube 4 is screwed into the sealing tube 3, the left end of the restraining ring 5 abuts against the grout outlet tube 4, and the grout outlet tube 4 can be better fixed.
Further, in order to ensure the connection reliability of the sealing pipe 3 and the corrugated pipe 1, the length of the portion of the sealing pipe 3 located on the left side of the grout outlet pipe 4 is preferably not less than 150mm and not more than 200 mm.
The utility model provides a sealing device of a corrugated pipe at the fixed end of an extrusion anchorage device, which also comprises a positioning steel bar 4-1, a slurry outlet pipe 4 is welded with the positioning steel bar 4-1, and the position of the sealing device is fixed through the positioning steel bar 4-1; in addition, in order to improve the compressive strength of the concrete after anchoring, the spiral rib 4-2 is sleeved outside the positioning steel bar 4-1, and after the spiral rib 4-2 is installed in place, the spiral rib 4-2 and the positioning steel bar 4-1 can be connected or bound and fixed in a spot welding mode.
During installation, after the whole bundle of prestressed steel strands 8 is extruded by the extrusion anchor 10, the whole bundle firstly passes through the spiral ribs 4-2 and then penetrates into the corrugated pipe 1, so that the spiral ribs 4-2 are sleeved outside the whole sealing device, and after the sealing pipe 3 and the anchor plate 9 are fixed, the spiral ribs 4-2 and the positioning steel bars 4-1 are fixed through spot welding or binding.
To sum up, the utility model provides an extrusion ground tackle stiff end bellows sealing device, simple structure, the leakproofness is good, does not influence the mud jacking in the follow-up bellows 1.
In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "vertical", and the like refer to orientations or positional relationships based on the orientation shown in the drawings, and are used for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention.
In addition, the embodiments in the specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant part can be referred to the method part for description.
The corrugated sealing device at the fixed end of the extrusion anchor provided by the utility model is described in detail above. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (10)
1. The utility model provides an extrusion ground tackle stiff end bellows sealing device, its characterized in that, includes bellows (1), sealed tube (3) and play thick liquid pipe (4), the left end cover of sealed tube (3) is in outside the end of bellows (1), the right-hand member of sealed tube (3) seals and is equipped with spacing pipe (6) that are used for steel strand wires (8) to wear out, the lower extreme that goes out thick liquid pipe (4) stretches into in sealed tube (3), and is located the end of bellows (1) with between spacing pipe (6), the left end of sealed tube (3) with be equipped with sealing washer (2) between bellows (1), spacing pipe (6) with it is sealed through sealed glue (7) between steel strand wires (8).
2. The bellows sealing device at the fixed end of an extrusion anchor as claimed in claim 1, wherein the sealant (7) is a two-component polysulfide sealant or a silicone adhesive.
3. The sealing device of corrugated pipe at the fixed end of extrusion anchor as claimed in claim 1, wherein the sealing tape (2-1) is wound around the joint of the left end of the sealing pipe (3) and the corrugated pipe (1).
4. A bellows sealing device at the fixed end of an extrusion anchor according to claim 3, wherein the sealing tube (3) has an inner diameter equal to the outer diameter of the bellows (1).
5. The bellows seal at the fixed end of an extrusion anchor according to claim 4, wherein the wall thickness of the sealing tube (3) is not less than 1/50 and not less than 2mm of its inner diameter.
6. The sealing device for the corrugated pipe at the fixed end of the extrusion anchor is characterized in that the slurry outlet pipe (4) is vertically arranged, and the lower end of the slurry outlet pipe (4) is in threaded connection with the sealing pipe (3).
7. The bellows seal at the fixed end of an extrusion anchor as claimed in claim 6, wherein the length of the slurry outlet pipe (4) extending into the sealing pipe (3) is equal to the wall thickness of the bellows (1).
8. The bellows sealing device at the fixed end of an extrusion anchor as claimed in claim 7, further comprising a restraining ring (5) sleeved outside the right end of the sealing tube (3), wherein the lower end of the slurry outlet tube (4) is located between the end of the bellows (1) and the restraining ring (5).
9. The extrusion anchor fixed end bellows seal device of claim 8, wherein the sealing tube (3) has a length equal to the restraint ring (5) on the right side of the grout outlet tube (4), and a length not less than 150mm and not more than 200mm on the left side of the grout outlet tube (4).
10. The extrusion anchor fixed end corrugated pipe sealing device as claimed in claim 1, further comprising a positioning steel bar (4-1) and a spiral rib (4-2), wherein the slurry outlet pipe (4) is connected with the positioning steel bar (4-1) in a welding manner, and the spiral rib (4-2) is sleeved outside the positioning steel bar (4-1) and fixed with the positioning steel bar (4-1) in a spot welding or binding manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922198466.8U CN211340381U (en) | 2019-12-10 | 2019-12-10 | Bellows sealing device at fixed end of extrusion anchor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922198466.8U CN211340381U (en) | 2019-12-10 | 2019-12-10 | Bellows sealing device at fixed end of extrusion anchor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211340381U true CN211340381U (en) | 2020-08-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922198466.8U Active CN211340381U (en) | 2019-12-10 | 2019-12-10 | Bellows sealing device at fixed end of extrusion anchor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211340381U (en) |
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- 2019-12-10 CN CN201922198466.8U patent/CN211340381U/en active Active
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