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CN-224229556-U - Anti-leakage inner and outer plastic-coated composite steel pipe

CN224229556UCN 224229556 UCN224229556 UCN 224229556UCN-224229556-U

Abstract

The utility model belongs to the technical field of steel pipes, in particular to an anti-leakage inner and outer plastic-coated composite steel pipe which comprises a steel pipe I, wherein a steel pipe II is installed at one end of the steel pipe through a flange plate, a protective shell is connected to the outer wall of the steel pipe II in a sliding mode, a positioning groove is formed in the side wall of the protective shell, a movable ring is connected to the outer wall of the steel pipe I in a sliding mode, a rotating ring is connected to the outer wall of the movable ring in a rotating mode, a clamping block is fixedly connected to one side of the movable ring in the middle of the rotating ring, the clamping block is clamped in the positioning groove, a through groove is formed in the side wall of one end of the steel pipe, a connecting block is connected to the middle of the through groove in a sliding mode, the top of the connecting block is fixedly connected to the middle of the movable ring, the flange and a fixing bolt can be protected through the cooperation between the movable ring, the rotating ring and the protective shell, the risk of corrosion of water vapor and impurities in the outside air is reduced, the stability of connection of the steel pipe I and the steel pipe II is improved, and the risk of leakage at the connection position of the steel pipe II is reduced.

Inventors

  • WU BAOCHANG
  • Zhong Dianhai
  • JIA YANCHUN
  • JIANG BAOGUO

Assignees

  • 潍坊天德管业有限公司

Dates

Publication Date
20260512
Application Date
20250630

Claims (7)

  1. 1. A leakage-proof inner and outer plastic-coated composite steel pipe comprises a first steel pipe (1) and is characterized in that a second steel pipe (2) is installed at the end portion of the first steel pipe (1) through a flange plate (3), a protective shell (43) is connected to the outer wall of the second steel pipe (2) in a sliding mode, a positioning groove (44) is formed in the side wall of the protective shell (43), a movable ring (4) is connected to the outer wall of the first steel pipe (1) in a sliding mode, a rotating ring (41) is connected to the outer wall of the movable ring (4) in a rotating mode, a clamping block (42) is fixedly connected to one side, located on the middle portion of the movable ring (4), of the rotating ring (41) in a clamping mode, the clamping block (42) is clamped in the positioning groove (44), a through groove (55) is formed in the side wall of the end portion of the first steel pipe (1), a connecting block (54) is connected to the middle portion of the through groove (55) in a sliding mode, and the top of the connecting block (54) is fixedly connected to the middle portion of the movable ring (4).
  2. 2. The anti-leakage inner and outer plastic-coated composite steel pipe is characterized in that an inner wall of the end part of a first steel pipe (1) is connected with a circular ring (5) in a sliding mode, the bottom of a connecting block (54) is fixedly connected to the side wall of the circular ring (5), a sealing ring (52) is connected to the inner wall of the end part of the first steel pipe (1) on one side of the circular ring (5) in a sliding mode, a sealing groove (53) is formed in the end part of a second steel pipe (2), the sealing ring (52) is clamped in the sealing groove (53), and a spring (51) is connected between the circular ring (5) and the sealing ring (52).
  3. 3. The anti-leakage inner and outer plastic-coated composite steel pipe as claimed in claim 1, wherein the inner wall and the outer wall of the steel pipe I (1) are covered with plastic-coated layers (12), and the weather-proof layers (11) are covered on the plastic-coated layers (12).
  4. 4. The anti-leakage inner and outer plastic-coated composite steel pipe is characterized in that an annular groove (46) is formed in the outer wall of the movable ring (4), a positioning ring (45) is fixedly connected to the middle of the rotary ring (41), and the positioning ring (45) is slidably installed in the annular groove (46).
  5. 5. The anti-leakage inner and outer plastic-coated composite steel pipe according to claim 4, wherein a plurality of groups of clamping blocks (42) and positioning grooves (44) are arranged, and the groups of clamping blocks (42) and the positioning grooves (44) are distributed at equal intervals in the circumferential direction.
  6. 6. A leakproof inner and outer plastic-coated composite steel pipe according to claim 5 is characterized in that the locating groove (44) is an L-shaped groove.
  7. 7. The anti-leakage inner and outer plastic-coated composite steel pipe according to claim 2, wherein a plurality of springs (51) are arranged, and the springs (51) are circumferentially distributed between the sealing ring (52) and the circular ring (5) at equal intervals.

Description

Anti-leakage inner and outer plastic-coated composite steel pipe Technical Field The utility model belongs to the technical field of steel pipes, and particularly relates to an anti-leakage inner and outer plastic-coated composite steel pipe. Background The composite steel pipe with plastic coating inside and outside is one steel-plastic composite pipe with steel pipe as base body and one plastic anticorrosive layer welded to the inside and outside surface via specific technological process and is used in gas, liquid or solid particle fluid conveying apparatus. In the prior art, most steel pipes are connected by using flanges or hoops when being connected and installed, and on the basis, bolts and nuts can be used for fixing, so that the stability and the tightness of the connection of the steel pipes are ensured. However, in the use process of most internal and external plastic-coated composite steel pipes, the connecting bolts and the nuts are exposed to the external environment, water vapor and impurities in the external air can attack the connecting bolts and the nuts, so that the bolts and the nuts are loosened, and the pipeline joint is leaked, so that the practicability of the steel pipes is greatly reduced, and therefore, the anti-leakage internal and external plastic-coated composite steel pipes are provided for solving the problems. Disclosure of utility model In order to overcome the defects of the prior art and solve at least one technical problem in the background art, the utility model provides an anti-leakage inner and outer plastic-coated composite steel pipe. The technical scheme includes that the anti-leakage inner and outer plastic-coated composite steel tube comprises a steel tube I, a steel tube II is mounted at one end of the steel tube through a flange plate, a protective shell is connected to the outer wall of the steel tube II in a sliding mode, a positioning groove is formed in the side wall of the protective shell, a movable ring is connected to the outer wall of the steel tube I in a sliding mode, a rotating ring is connected to the outer wall of the movable ring in a rotating mode, a clamping block is fixedly connected to the middle portion of the rotating ring on one side of the movable ring, the clamping block is clamped in the positioning groove, a through groove is formed in the side wall of one end of the steel tube, a connecting block is connected to the middle portion of the through groove in a sliding mode, and the top of the connecting block is fixedly connected to the middle portion of the movable ring. The inner wall of one end part of the steel pipe is connected with a circular ring in a sliding manner, the bottom of the connecting block is fixedly connected to the side wall of the circular ring, the inner wall of one end part of the steel pipe is connected with a sealing ring in a sliding manner on one side of the circular ring, sealing grooves are formed in two end parts of the steel pipe, the sealing ring is clamped in the sealing grooves, and a spring is connected between the circular ring and the sealing ring. Preferably, the inner wall and the outer wall of the first steel pipe are covered with plastic-coated layers, and the weather-proof layers are covered on the two plastic-coated layers. Preferably, the outer wall of the movable ring is provided with an annular groove, the middle part of the rotating ring is fixedly connected with a positioning ring, and the positioning ring is slidably arranged in the annular groove. Preferably, the clamping blocks and the positioning grooves are arranged in a plurality of groups, and the clamping blocks and the positioning grooves are circumferentially distributed at equal intervals. Preferably, the positioning groove is an L-shaped groove. Preferably, the springs are provided in a plurality, and the springs are circumferentially distributed between the sealing ring and the circular ring at equal intervals. The utility model has the beneficial effects that: 1. The utility model provides a leakage-proof inner and outer plastic-coated composite steel pipe, which can protect a flange and a fixing bolt through the matching of a moving ring, a rotating ring and a protective shell, reduce the risk of corrosion of water vapor and impurities in the outside air, improve the stability of the connection of a first steel pipe and a second steel pipe and reduce the leakage risk of the connection part of the first steel pipe and the second steel pipe. 2. The utility model provides a leakage-proof inner and outer plastic-coated composite steel pipe, which can ensure the tightness between a first steel pipe and a second steel pipe through the cooperative cooperation among a circular ring, a spring, a sealing ring, a sealing groove and a connecting block. And moreover, the tightness degree of the sealing ring and the sealing groove can be enhanced by extruding the spring, the risk of loosening caused by aging is reduced, and the leakage-pr