Method for removing rusty threaded pipe orifice embedded in three-way pipe

Abstract

The invention discloses a dismantling method for a rusty threaded pipe orifice embedded in a three-way pipe. The dismantling method comprises the following steps that S1, a lining is manufactured; s2, the linings are inserted into the embedded steel pipe, an ejector rod penetrates into a threaded hole of the second lining, and the ejector rod abuts against the first lining; s3, the ejector rod continues to be tightened to separate the first lining from the second lining until the outer surfaces of the first lining and the second lining are tightly attached to and abut against the inner wall face of the embedded steel pipe; and S4, then handles are inserted into gaps between the ejector rods and gaps between the ejector rods and the full-length screw rod, and then the handles rotate circumferentially along the center of the lining until the handles are screwed out and dismantled. Compared with the prior art, the device is easy to disassemble, easy in quality control, low in breakage rate and good in implementation effect; procedures are few, speed is high, efficiency is high, and cost is low; design is reasonable, stress points exist, operation is convenient, implementation is easy, and the period is short; and the finished product is easy to protect, the application range is wide, and the potential safety hazard is small.

Description

Technical Field

[0001] The invention relates to the technical field of building structures and construction methods, and in particular to a method for removing a rusted threaded pipe opening embedded in a tee pipe. Background Art

[0002] At present, pipe threads are often used as the connection method for pipelines. Generally, after using steel pipelines for a long time, it is easy for the inner mouth of the tee to rust and become unusable. It is necessary to remove the embedded rusted pipe mouth, otherwise the entire tee will be scrapped. It is necessary to close the main valve and remove the other two good ports. The general method is (1) to destroy the embedded pipe mouth with an electric drill and then remove it with pliers; (2) directly replace the tee and scrap it; (3) cut a small section of the tee mouth, then expose the embedded threaded pipe mouth, and use pliers to rotate out the pipe mouth. The above methods have the following limitations: 1. It is difficult to remove, the quality is difficult to guarantee, and the implementation effect is poor; 2. There are many processes, slow speed, low efficiency, and high cost; 3. It is inconvenient to operate, there is no stress point, it is difficult to implement, and the cycle is long; 4. It requires a lot of man-hours, it is difficult to protect the finished product, the scope of application is narrow, and there are great safety hazards. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a method for removing a rusted threaded pipe opening embedded in a tee pipe. To achieve this technical purpose, the present invention adopts the following scheme: A method for removing a rusted threaded pipe opening embedded in a tee pipe comprises the following steps: S1. manufacturing a lining, wherein the lining includes a first lining and a second lining; S2, insert the liner into the embedded steel pipe, insert the push rod into the threaded hole of the second liner, and make the push rod rest against the first liner; S3, continue to tighten the push rod to separate the first liner and the second liner until the outer surfaces of the first liner and the second liner are tightly fitted and pressed against the inner wall of the embedded steel pipe; S4. Then, insert the handle into the gap between the first liner and the second liner at the position between the push rods and between the push rod and the full-length screw respectively. Then, rotate the handle in a circle along the center of the liner. Separate the first liner from the second liner through the push rod in the liner. Keep the outer surface of the liner tightly fitted with the inner surface of the embedded steel pipe. The friction and resistance generated by the tight push drive the embedded steel pipe to rotate until it is turned out and removed.

[0004] Compared with the prior art, the present invention has the following beneficial effects: 1. Easy to dismantle, easy to control quality, low breakage rate and good implementation effect; 2. Fewer processes, faster speed, higher efficiency and lower cost; 3. Reasonable design, force bearing points, convenient operation, simple implementation and short cycle; 4. Less labor hours are required, the finished product is easy to protect, has a wide range of applications, and has little safety hazards.

[0005] Furthermore, the liner includes a first liner and a second liner, one end of the first liner and the second liner is provided with a through hole, a through-length screw passes through the through hole and is connected with a nut, connecting the first liner and the second liner into a whole; the second liner is provided with a plurality of threaded holes at one end away from the through-length screw.

[0006] Furthermore, the maximum width of the lining cross section is smaller than the inner diameter of the embedded steel pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a schematic diagram of removing a threaded pipe nozzle according to an embodiment of the present invention; Figure 2 It is a cross-sectional view of the top rod of the liner according to one embodiment of the present invention; Markings in the figure are: 1. steel wire pipe; 2. tee; 3. embedded steel pipe; 4. lining; 41. first lining; 42. second lining; 5. full-length screw; 6. nut; 7. push rod. DETAILED DESCRIPTION

[0008] In order to fully understand the purpose, features and effects of the present invention, the present invention is described in detail through the following specific implementation methods, but the present invention is not limited thereto.

[0009] See also Figure 1 and Figure 2 The interface of the steel wire pipe 1 is connected by a tee 2 and tightened by a threaded connection. After long-term use, corrosion and rust will occur, and there may be leakage, cracks, etc. During the process of loosening and unscrewing, the steel wire pipe 1 often breaks due to severe rust and embeds in the tee 2 to form an embedded steel pipe 3, which makes it impossible to remove the pipe mouth or it is particularly difficult to remove it.

[0010] The present invention provides a method for removing a rusted threaded pipe opening embedded in a tee pipe, comprising the following steps: S1. Make the lining 4, which includes a first lining 41 and a second lining 42. Through holes are set at one end of the first lining 41 and the second lining 42. The through-holes are passed through by the through-holes and connected with nuts 6, so that the first lining 41 and the second lining 42 are connected as a whole. The second lining 42 is provided with a plurality of threaded holes at one end away from the through-holes 5. The maximum width of the lining 4 is smaller than the inner diameter of the embedded steel pipe 4.

[0011] S2, insert the liner 4 into the embedded steel pipe 3, insert the push rod 7 into the threaded hole of the second liner 42, and make the push rod 7 abut against the first liner 41; S3, continue to tighten the push rod 7 to separate the first liner 41 and the second liner 42 until the outer surfaces of the first liner 41 and the second liner 42 are tightly fitted to the inner wall of the embedded steel pipe 3; S4. Then, insert the handle into the gap between the first liner 41 and the second liner 42 at the position of the push rod 7 and the position between the push rod 7 and the through-length screw rod 5, and then rotate it in a circle along the center of the liner 4. The first liner 41 and the second liner 42 are separated by the push rod 7 in the liner 4 until the outer surface of the liner 4 is tightly fitted with the inner surface of the embedded steel pipe 3. The friction and resistance generated by the pressing drive the embedded steel pipe 3 to rotate until it is turned out and removed.

[0012] In a specific embodiment, a method for removing a corroded threaded pipe opening embedded in a tee pipe comprises the following steps: S1. Make the lining 4. Use high-strength steel bars that are compatible with the inner diameter of the embedded steel pipe 3 to make the lining 4. The diameter of the high-strength steel bars is slightly smaller than the inner diameter of the embedded steel pipe 3. The high-strength steel bars are longitudinally divided into two to form a first lining 41 and a second lining 42. A through hole is set at one end of the first lining 41 and the second lining 42. The through hole is perpendicular to the center dividing plane of the high-strength steel bars. A plurality of threaded holes are set at the other end of the second lining 42. The threaded holes and the through holes are in a straight line and are set at a certain distance. Use a full-length screw 5 to pass through the through holes of the first lining 41 and the second lining 42 and screw in the connecting nut 6 to connect the first lining 41 and the second lining 42 into a whole.

[0013] S2, insert the liner 4 into the embedded steel pipe 3, insert the push rod 7 into the threaded hole of the second liner 42, so that the push rod 7 is against the first liner 41, and the push rod 7 adopts a high-strength full-thread screw; S3, continue to tighten the push rod 7 to separate the first liner 41 and the second liner 42 to form a gap between the first liner 41 and the second liner 42, until the outer surfaces of the first liner 41 and the second liner 42 are tightly fitted and pressed against the inner wall of the embedded steel pipe 3; S4. Then, insert the steel chisel into the gap between the first liner 41 and the second liner 42 at the position between the push rods 7 and the position between the push rod 7 and the full-length screw rod 5 respectively, and then rotate it counterclockwise along the center of the liner 4 to separate the first liner 41 and the second liner 42 through the push rod 7 in the liner 4. The friction and resistance generated by the tight fit between the outer surface of the liner 4 and the inner surface of the embedded steel pipe 3 drive the embedded steel pipe 3 to rotate until it is turned out and removed.

[0014] In another specific embodiment, two or more through-length screws 5 are provided, which are specifically determined according to the diameter to ensure the stability of the structure of the lining 4; the outer surface of the lining 4 is treated to be roughened to increase the friction resistance with the embedded steel pipe 3, so that the embedded steel pipe 3 can be screwed out and removed faster.

[0015] The method of the present invention is applied to the "Research and Application of High-efficiency Installation Technology of Thermal Pipes and Equipment" in the thermal network construction project of the southern area of ​​a certain economic development zone. It is found through actual application that the scheme of the present invention has the following advantages: (1) Easy to dismantle, easy to control quality, low breakage rate, and good implementation effect; (2) Few processes, fast speed, high efficiency, and low cost; (3) Reasonable design, with stress points, convenient operation, simple implementation, and short cycle; (4) Simple installation and reusable.

[0016] Finally, it should be noted that the above are only preferred embodiments of the present invention. Of course, those skilled in the art can make changes and modifications to the present invention. If these modifications and variations fall within the scope of the claims of the present invention and their equivalent technologies, they should be considered to be within the scope of protection of the present invention.

Claims

1. A method for removing a corroded threaded pipe opening embedded in a tee pipe, characterized in that: The following steps are involved: S1. manufacturing an inner lining (4), wherein the inner lining (4) comprises a first inner lining (41) and a second inner lining (42); S2, inserting the inner liner (4) into the embedded steel pipe (3), inserting the push rod (7) into the threaded hole of the second inner liner (42), so that the push rod (7) abuts against the first inner liner (41); S3, continue to tighten the push rod (7) to separate the first liner (41) and the second liner (42) until the outer surfaces of the first liner (41) and the second liner (42) are tightly fitted and pressed against the inner wall surface of the embedded steel pipe (3); S4. Then, at the position between the push rods (7) and the position between the push rods (7) and the through-length screw rod (5), the handles are respectively inserted into the gaps between the first liner (41) and the second liner (42). The handles are then rotated in a circular motion along the center of the liner (4). The first liner (41) and the second liner (42) are separated by the push rods (7) in the liner (4). The outer surface of the liner (4) and the inner surface of the embedded steel pipe (3) are tightly fitted together. The friction force and resistance generated by the tight pressing drive the embedded steel pipe (3) to rotate until it is twisted out and removed.

2. The method for removing the rusted threaded pipe opening embedded in the tee pipe according to claim 1, characterized in that: The liner (4) comprises a first liner (41) and a second liner (42); one end of the first liner (41) and the second liner (42) is provided with a through hole; a through-length screw (5) passes through the through hole and is connected to a nut (6), so that the first liner (41) and the second liner (42) are connected as a whole; and one end of the second liner (42) away from the through-length screw (5) is provided with a plurality of threaded holes.

3. The method for removing a corroded threaded pipe opening embedded in a tee pipe according to claim 1, characterized in that: The maximum width of the cross section of the inner lining (4) is smaller than the inner diameter of the embedded steel pipe (4).

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