CN214467033U - Three-way pipe fitting for blocking cast iron pipeline under pressure - Google Patents
Three-way pipe fitting for blocking cast iron pipeline under pressure Download PDFInfo
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- CN214467033U CN214467033U CN202120494740.0U CN202120494740U CN214467033U CN 214467033 U CN214467033 U CN 214467033U CN 202120494740 U CN202120494740 U CN 202120494740U CN 214467033 U CN214467033 U CN 214467033U
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Abstract
The utility model discloses a cast iron pipeline pressurized plugging tee pipe fitting, which comprises a pipe fitting main body formed by buckling an upper pipe sheet and a lower pipe sheet, wherein the buckling edges of the upper pipe sheet and the lower pipe sheet are fixedly connected by welding through connecting gaskets, the edges of the two ends of the upper pipe sheet are outwards turned to form upper connecting lugs, the edges of the two ends of the lower pipe sheet are outwards turned to form lower connecting lugs, and the upper connecting lugs and the lower connecting lugs are in adaptive buckling to form an annular connecting piece; the outer sides of the two annular connecting pieces are fixedly connected with sealing flanges which are matched and attached with the two annular connecting pieces respectively, and the sealing flanges are formed by buckling an upper sealing piece and a lower sealing piece; the middle part of the upper surface of the upper pipe piece is provided with a through hole with the diameter consistent with that of the inner cavity of the pipe fitting main body, a pipe fitting branch perpendicular to the pipe fitting main body is fixedly connected to the through hole in a sealing mode, and the outer end of the pipe fitting branch is provided with a branch flange of an annular structure. The utility model discloses the advantage is in guaranteeing the transverse sealing nature, promotes joint strength, effectively solves the problem that the unable footpath hole of opening of mechanical fixture tee bend on the current market, makes the construction process of disk shutoff can be applied to on the cast iron pipeline.
Description
Technical Field
The utility model belongs to the technical field of the shutoff technique is pressed in the pipeline area and specifically relates to a shutoff tee bend pipe fitting is pressed in cast iron pipeline area is related to.
Background
The technology for blocking the pipeline under pressure is a construction operation means for isolating and blocking the pipeline at a modified section from the pipeline by physical, mechanical and other means at two sides of the pipeline with a section to be modified in a completely closed state, and performing modification such as maintenance, repair, replacement and the like.
Cast iron pipes are pipes cast from cast iron and are commonly used for water supply, drainage and gas delivery; cast iron pipelines have inherent defects, such as pipeline aging, large expansion and contraction, inadequacy for long time sunlight irradiation, poor compression resistance, poor construction property, poor deformability and poor flexibility, so that at present, the operations of damaging the cast iron pipelines or additionally installing valves and the like can only be stopped for transportation and replaced by the whole pipelines. For the common pipe disc type under-pressure plugging operation in the pipe construction, the first key process is to weld the special three-way pipe fitting for under-pressure plugging, but the welding performance of the cast iron pipe is poor, so that the problems of cracking, poor welding and the like are easily caused in the welding process, and the disc type under-pressure plugging operation cannot be carried out for the cast iron pipe because the existing market does not have the disc type plugging three-way pipe fitting specially used for the cast iron pipe.
In addition, a common mechanical clamp tee joint is generally formed by fixedly connecting an upper semicircular guard plate and a lower semicircular guard plate in a threaded manner, and pressing a sealing ring made of a sealing material at the end part of a pipe sleeve formed by buckling the upper guard plate and the lower guard plate by using a fastening bolt so as to form effective sealing; however, this type of tee pipe fitting can only be used for low-pressure pipes, the diameter of the opening is much smaller than that of the female pipe, and the disc type plugging requires to open a hole with the same diameter as the original pipe on the original pipe.
Disclosure of Invention
The utility model aims to provide a shutoff tee bend pipe fitting is pressed in cast iron pipeline area.
In order to achieve the above purpose, the utility model can adopt the following technical proposal:
iron pipe says area and presses shutoff tee bend pipe fitting, its characterized in that: the pipe fitting comprises a pipe fitting main body, wherein the inner diameter of the pipe fitting main body is matched with the outer diameter of a cast iron pipeline, the pipe fitting main body is formed by buckling an upper pipe piece and a lower pipe piece, the cross sections of the upper pipe piece and the lower pipe piece are of a semicircular structure, the buckling edges of the upper pipe piece and the lower pipe piece are fixedly connected through connecting gaskets in a welding mode, the edges of the two ends of the upper pipe piece are outwards turned to form upper connecting lugs, the edges of the two ends of the lower pipe piece are outwards turned to form lower connecting lugs, and the upper connecting lugs and the lower connecting lugs are matched and buckled to form annular connecting pieces located at the two ends of the pipe fitting main body; the outer sides of the two annular connecting pieces are fixedly connected with sealing flanges which are matched and attached with the two annular connecting pieces respectively, and the sealing flanges are formed by buckling an upper sealing piece and a lower sealing piece which are of semicircular structures; the middle part of the upper surface of the upper duct piece is provided with a through hole with the diameter consistent with that of the inner cavity of the pipe fitting main body, a pipe fitting branch perpendicular to the pipe fitting main body is fixedly connected to the through hole in a sealing mode, and the outer end of the pipe fitting branch is provided with a branch flange of an annular structure.
The joint surface of the sealing flange and the pipe fitting main body is provided with a ring sealing structure, the ring sealing structure comprises a sealing ring groove which is arranged on the end surface of the pipe fitting main body and communicated with the inner cavity of the pipe fitting main body, and a ring sealing boss which is arranged on the sealing flange and is in adaptive clamping connection with the sealing ring groove, and a sealing element is arranged in the sealing ring groove; the sealing element is an annular rubber sealing ring filled in the sealing ring groove; the edge of the outer end face of the annular sealing boss is of a chamfer structure.
The utility model has the advantages that the upper duct piece and the lower duct piece which form the main body of the pipe fitting can perfectly coat the outer wall of the cast iron pipeline and are convenient to install, and the upper duct piece and the lower duct piece are fixedly connected by welding through the connecting gasket, thereby effectively avoiding the contact between welding materials and the cast iron pipeline, ensuring the transverse sealing property of the main body of the pipe fitting, improving the connecting strength of the upper duct piece and the lower duct piece, ensuring the stability of the upper duct piece and the lower duct piece which can be in service for a long time, and simultaneously, the upper duct piece and the lower duct piece which are connected by adopting a welding mode can also effectively solve the problem that a mechanical fixture tee joint on the market can not open a radial hole, thereby enabling the construction process of disc type plugging to be applied to the cast iron pipeline; in addition, the sealing flanges fixedly connected to two ends of the pipe fitting main body in a threaded manner further guarantee good circumferential sealing performance of the pipe fitting main body, the sealing flanges also adopt a mode that upper and lower sealing pieces are fixedly connected through welding through connecting gaskets, the connecting strength of the sealing flanges is guaranteed while assembly is facilitated, and the pipe fitting main body can be effectively guaranteed in both transverse sealing performance and circumferential sealing performance.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a left side view of fig. 1 (with the connection pads hidden).
Fig. 3 is an enlarged view of a portion a in fig. 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
As shown in fig. 1 and 2, the pressure plugging tee pipe fitting for the cast iron pipeline comprises an inner diameter and a cast iron pipeline outer diameter matched pipe fitting main body, wherein the pipe fitting main body is formed by buckling an upper pipe sheet 1 and a lower pipe sheet 2 of a semicircular structure on the section, the buckling edges of the upper pipe sheet 1 and the lower pipe sheet 2 are fixedly connected through welding of a connecting gasket 3, the connecting strength of the upper pipe sheet 1 and the lower pipe sheet 2 is improved when the pipe fitting main body is convenient to install, and the transverse sealing performance of the pipe fitting main body is guaranteed.
The middle part of the upper surface of the upper duct piece 1 is provided with a through hole 4, and the upper duct piece 1 and the lower duct piece 2 are connected in a welding mode, so that the connection strength is ensured, and the size of the through hole 4 can be opened to be consistent with the diameter of the inner cavity of the pipe fitting main body, so that the disc type plugging construction process can be applied to a cast iron pipeline; in addition, a pipe branch 5 perpendicular to the pipe main body is fixedly connected to the through hole 4 in a sealing mode, a branch flange 6 of an annular structure is arranged at the outer end of the pipe branch 5, a pipeline branch consistent with the pipe diameter of the main line of the cast iron pipeline can be communicated through the branch flange 6, and therefore the pipeline to be reconstructed is isolated and blocked from the pipeline, and reconstruction construction such as maintenance, repair and replacement can be conveniently carried out subsequently.
In order to improve the circumferential sealing performance of the pipe fitting main body, the two end edges of the upper pipe piece 1 are outwards turned to form a pair of upper connecting lugs 7, the two end edges of the lower pipe piece 2 are outwards turned to form a pair of lower connecting lugs 8, and the two upper connecting lugs 7 and the two lower connecting lugs 8 are in one-to-one correspondence and are matched and buckled to form annular connecting pieces positioned at the two end parts of the pipe fitting main body; meanwhile, the outer sides of the two annular connecting pieces are fixedly connected with sealing flanges which are matched and attached with the two annular connecting pieces respectively, the sealing flanges are formed by buckling an upper sealing piece 9 of a semicircular structure and a lower sealing piece 10 of the semicircular structure, and the sealing flanges can be formed by directly cutting off the middle parts of the annular flanges.
In addition, in order to further ensure that the circumferential sealing performance of the pipe fitting main body is better, as shown in fig. 3, a ring sealing structure is arranged on the joint surface of the sealing flange and the pipe fitting main body, and comprises a sealing ring groove 11 which is arranged on the end surface of the pipe fitting main body and communicated with the inner cavity of the pipe fitting main body, and a ring sealing boss 12 which is arranged on the sealing flange and is in adaptive clamping connection with the sealing ring groove 11, when in actual processing and manufacturing, because the pipe fitting main body is formed by buckling an upper pipe sheet 1 and a lower pipe sheet 2, and the sealing flange is formed by buckling an upper sealing element 9 and a lower sealing element 10, the sealing ring groove 11 is formed by splicing a pair of semicircular ring grooves, and similarly, the ring sealing boss 12 is formed by splicing a pair of semicircular bosses; the sealing ring groove 11 is provided with a sealing element, which may be an annular rubber sealing ring 13 filled in the sealing ring groove 11, or may be a sealing filler (such as polytetrafluoroethylene) filled in the sealing ring groove. Meanwhile, the edge of the outer end face of the annular sealing boss 12 can be designed to be a chamfer structure, so that the annular sealing boss 12 has certain taper, and the sealing performance can be improved by improving the pretightening force of the bolt connection between the sealing flange and the annular connecting piece.
When in use, the corresponding upper pipe sheet 1 and lower pipe sheet 2, upper sealing element 9 and lower sealing element 10 are processed and manufactured according to the actual outer diameter and wall thickness of the cast iron pipeline; selecting a part with a relatively smooth and flat outer surface as a plugging point on the cast iron pipeline of the section to be reconstructed, polishing, and removing surface impurities and rust; then, correspondingly buckling the upper duct piece 1, the lower duct piece 2, the upper sealing element 9 and the lower sealing element 10 on the outer wall of the cast iron pipeline; then, the upper pipe sheet 1 and the lower pipe sheet 2 are fixedly connected through welding by the connecting gasket 3, and the buckling edges of the upper sealing element 9 and the lower sealing element 10 are fixedly connected through welding; and finally, filling sealing elements into sealing ring grooves at two ends of a pipe fitting main body formed by buckling an upper pipe sheet 1 and a lower pipe sheet 2 (if the sealing elements are annular rubber sealing rings 13, the annular rubber sealing rings 13 are required to be cut into two semicircular sections which are respectively filled into the sealing ring grooves, and if the sealing elements are filled with sealing filler, the sealing ring grooves can be directly filled), and fixedly connecting the annular connecting piece consisting of an upper connecting lug 7 and a lower connecting lug 8 with a sealing flange consisting of an upper sealing element 9 and a lower sealing element 10 in a screwed manner, so that the installation of the three-way pipe fitting is completed. Treat tee bend pipe fitting installation accomplish the back, alright use the construction technology of disk shutoff to open the footpath hole to cast iron pipeline.
Claims (4)
1. The utility model provides a cast iron pipeline blocks up tee bend pipe fitting with pressure which characterized in that: the pipe fitting comprises a pipe fitting main body, wherein the inner diameter of the pipe fitting main body is matched with the outer diameter of a cast iron pipeline, the pipe fitting main body is formed by buckling an upper pipe piece and a lower pipe piece, the cross sections of the upper pipe piece and the lower pipe piece are of a semicircular structure, the buckling edges of the upper pipe piece and the lower pipe piece are fixedly connected through connecting gaskets in a welding mode, the edges of the two ends of the upper pipe piece are outwards turned to form upper connecting lugs, the edges of the two ends of the lower pipe piece are outwards turned to form lower connecting lugs, and the upper connecting lugs and the lower connecting lugs are matched and buckled to form annular connecting pieces located at the two ends of the pipe fitting main body; the outer sides of the two annular connecting pieces are fixedly connected with sealing flanges which are matched and attached with the two annular connecting pieces respectively, and the sealing flanges are formed by buckling an upper sealing piece and a lower sealing piece which are of semicircular structures; the middle part of the upper surface of the upper duct piece is provided with a through hole with the diameter consistent with that of the inner cavity of the pipe fitting main body, a pipe fitting branch perpendicular to the pipe fitting main body is fixedly connected to the through hole in a sealing mode, and the outer end of the pipe fitting branch is provided with a branch flange of an annular structure.
2. The iron casting pipeline pressurized plugging tee pipe fitting of claim 1, characterized in that: the sealing flange with be provided with ring seal structure on the binding face of pipe fitting main part, ring seal structure is including offering in the sealed annular that is linked together rather than the inner chamber on the pipe fitting main part terminal surface, and set up in on the sealing flange with the sealed boss of annular adaptation joint, be provided with the sealing member in the sealed annular.
3. The iron casting pipeline pressurized plugging tee pipe fitting of claim 2, characterized in that: the sealing element is an annular rubber sealing ring filled in the sealing ring groove.
4. The iron casting pipeline pressurized plugging tee pipe fitting of claim 2, characterized in that: the edge of the outer end face of the annular sealing boss is of a chamfer structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120494740.0U CN214467033U (en) | 2021-03-09 | 2021-03-09 | Three-way pipe fitting for blocking cast iron pipeline under pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120494740.0U CN214467033U (en) | 2021-03-09 | 2021-03-09 | Three-way pipe fitting for blocking cast iron pipeline under pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214467033U true CN214467033U (en) | 2021-10-22 |
Family
ID=78153874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120494740.0U Active CN214467033U (en) | 2021-03-09 | 2021-03-09 | Three-way pipe fitting for blocking cast iron pipeline under pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214467033U (en) |
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2021
- 2021-03-09 CN CN202120494740.0U patent/CN214467033U/en active Active
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