Pulling-resistant efficient sealing MPP corrugated pipe

Abstract

The utility model relates to the field of corrugated pipes, and particularly discloses a tensile efficient sealing MPP corrugated pipe. An inner corrugated sealing gasket is fixedly arranged on the inner wall of the arc-shaped connecting piece, a sealing strip is fixedly arranged on the outer side of the arc-shaped connecting piece, and a sealing ring is fixedly arranged on the inner wall of the middle of the inner corrugated sealing gasket; a limiting piece longitudinally slides on the outer side of the arc-shaped connecting piece, a pulley is arranged on the outer side of the limiting piece, and rotating shafts are fixedly arranged at the two ends of the pulley; the main corrugated pipe body and the auxiliary corrugated pipe body are connected through the two arc-shaped connecting pieces, after the two corrugated pipe bodies are connected, the inner portion of the inner corrugated sealing gasket can be tightly attached to the limiting grooves in the outer sides of the two corrugated pipe bodies, and therefore the phenomenon of air leakage does not occur to connecting openings of the two corrugated pipe bodies in the later period of use.

Description

Technical Field

[0001] The present application relates to the field of bellows, and in particular to a tensile-resistant and highly efficient sealing MPP bellows. Background Art

[0002] MPP corrugated pipe is also called MPP power cable protection pipe, which is divided into trenchless type and excavation type. MPP corrugated pipe trenchless power pipe is also called MPP corrugated pipe top pipe or pull pipe. MPP corrugated pipe uses modified polypropylene as the main raw material. It is a construction project for laying pipelines and cables in special areas such as roads, railways, buildings, and riverbeds without large-scale dredging, digging, and damaging the road surface.

[0003] Existing MPP corrugated pipes need to be assembled when used. A common assembly method is to first wipe the outside of one end of an MPP corrugated pipe clean, then wipe the inner wall of one end of the other MPP corrugated pipe clean, then apply lubricant to the wiped area, and finally connect the two MPP corrugated pipes together with a tightening rope. However, this operation is too cumbersome and the installation method is too simple. Therefore, in later use, the sealing will not meet the standards, resulting in air leakage at the connection of the two MPP pipes. Utility Model Content

[0004] In order to solve the problem that two bellows can maintain good sealing after being connected, the present application provides a tensile-resistant and highly efficient sealing MPP bellows.

[0005] The present application provides a tensile-resistant and highly efficient sealed MPP corrugated pipe adopts the following technical solution: a tensile-resistant and highly efficient sealed MPP corrugated pipe, comprising an arc-shaped connecting piece, an inner corrugated sealing gasket is fixedly arranged on the inner wall of the arc-shaped connecting piece, a sealing strip is fixedly arranged on the outer side of the arc-shaped connecting piece, and a sealing ring is fixedly arranged on the inner wall of the middle part of the inner corrugated sealing gasket;

[0006] The outer side of the arc-shaped connecting member is longitudinally slidably provided with a limiting member, a pulley is arranged on the outer side of the limiting member, and rotating shafts are fixedly arranged at both ends of the pulley.

[0007] By adopting the above technical solution, two arc-shaped connectors can connect the main bellows and the auxiliary bellows. After the two bellows are connected by the arc-shaped connectors, they can have good sealing performance through the corrugated sealing gasket, and the two arc-shaped connectors can be limited on the outside of the two bellows by the limiting pieces.

[0008] Preferably, a connecting shaft is provided on the outer side of the arc-shaped connecting piece, the two arc-shaped connecting pieces are rotatably connected via the connecting shaft, and the two arc-shaped connecting pieces are enclosed to form a circle.

[0009] By adopting the above technical solution, the two arc-shaped connecting members can be rotatably connected through the connecting shaft, and the two arc-shaped connecting members are surrounded to form a circle.

[0010] Preferably, a slide groove is provided on the outer side of the arc-shaped connecting piece, the outer side of the sealing strip is fixedly connected to the inner wall of the slide groove, the limiting piece is slidably connected to the arc-shaped connecting piece through the slide groove, and the outer side of the limiting piece is tightly fitted to the inner wall of the sealing strip.

[0011] By adopting the above technical solution, the limiting member can be slidably connected to the arc-shaped connecting member through the sliding groove, and the limiting member can be more closely fitted with the sliding groove when sliding into the sliding groove through the sealing strip.

[0012] Preferably, a small limiting pad is fixedly provided at the bottom of the top of the limiting member, the outer side of the small limiting pad is tightly fitted with the inner wall of the top of the sealing strip, and through grooves are opened on both sides of the limiting member.

[0013] By adopting the above technical solution, the small limiting pad can enhance the friction when the limiting member is engaged with the top of the slide groove, and the outer side of the top of the limiting member can be tightly fitted with the sealing strip inside the slide groove.

[0014] Preferably, the pulley is rotatably connected to the limiting member by being embedded in the inner wall of the through groove through a rotating shaft, and the top of the limiting member is fixedly engaged with the top of the sliding groove.

[0015] By adopting the above technical solution, the pulley makes it smoother when the limiter is installed inside the slide groove later, so there will be no jamming phenomenon during later use.

[0016] Preferably, a main bellows is provided at one end of the arc-shaped connecting piece, and a secondary bellows is provided at one end of the main bellows. Limiting grooves are provided on the outer sides of one end of the main bellows and the secondary bellows, the inner wall of the inner bellows sealing gasket fits tightly with the limiting groove, and one end of the main bellows fits tightly with one side of the sealing ring, and one end of the secondary bellows fits tightly with the other side of the sealing ring.

[0017] By adopting the above technical solution, the two ends of the two bellows are tightly fitted with the two sides of the sealing ring respectively. When fitting with the sealing ring, the limiting groove on the outside of the bellows will also fit with the inner wall of the inner bellows sealing gasket, so that the sealing is stronger after the two bellows are installed.

[0018] In summary, the present application includes at least one of the following beneficial technical effects:

[0019] 1. The main bellows and the auxiliary bellows are connected by two arc-shaped connectors. After the two bellows are connected, the inner part of the inner bellows seal will fit tightly with the limit grooves on the outer sides of the two bellows. Therefore, there will be no air leakage at the connection ports of the two bellows during later use.

[0020] 2. The limiting piece is slid into one side of the arc-shaped connecting piece through the slide groove, so that the two arc-shaped connecting pieces are limited, and a sealing strip is fixedly provided on the inner wall of the slide groove. Therefore, after the limiting piece is installed later, the sealing of the sealing strip also makes the outer side of the limiting piece fit more closely with the inner wall of the slide groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of the back side of the utility model;

[0023] Figure 3 This is a schematic diagram of the three-dimensional cross-sectional structure of the utility model;

[0024] Figure 4 It is a schematic diagram of the three-dimensional structure of a local device of the utility model;

[0025] Figure 5 This is a schematic diagram of the exploded structure of a local device of the utility model;

[0026] Figure 6 This is a schematic diagram of the cross-sectional structure of the local equipment of the utility model Figure 1 ;

[0027] Figure 7 The utility model is a partial cross-sectional view of the structure Figure 2 .

[0028] Reference numerals: 10, main bellows; 11, auxiliary bellows;

[0029] 20. arc-shaped connector; 21. inner corrugated gasket; 22. sealing ring; 23. sealing strip; 24. slide groove;

[0030] 30. Limiting piece; 31. Small limiting pad; 32. Pulley; 33. Through groove. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1 —7 Provide further details of this application.

[0032] A tensile-resistant and highly-sealed MPP bellows comprises an arc-shaped connector 20, wherein a connecting shaft is welded and fixedly arranged on the outer side of one arc-shaped connector 20, a groove is provided on the outer side of the other arc-shaped connector 20, and one arc-shaped connector 20 is embedded in the groove on the outer side of the other arc-shaped connector 20 through the connecting shaft and is rotatably connected to the same, an inner wall of the arc-shaped connector 20 is fixedly provided with an inner corrugated sealing gasket 21 by means of strong glue, a sealing ring 22 is integrally fixedly arranged in the middle of the inner wall of the inner corrugated sealing gasket 21, one end of the main bellows 10 is tightly fitted with one side of the sealing ring 22, one end of the auxiliary bellows 11 is tightly fitted with the other side of the sealing ring 22, and limiting grooves are provided at one end of the main bellows 10 and the auxiliary bellows 11, and the arc-shaped connector 20 is rotated so that the arc-shaped connector 20 drives the inner corrugated sealing gasket 21 to rotate synchronously.

[0033] When the inner bellows sealing gasket 21 rotates to the outside of the main bellows 10 and the auxiliary bellows 11, the inner wall of the inner bellows sealing gasket 21 will fit tightly with the limiting grooves on the outside of the main bellows 10 and the auxiliary bellows 11. Therefore, after the two bellows are connected later, the connection between the two bellows can be effectively sealed through the inner bellows sealing gasket 21.

[0034] Reference Figure 5 When the arc-shaped connecting piece 20 and the inner corrugated sealing gasket 21 are sleeved on the outer sides of the main bellows 10 and the auxiliary bellows 11, the two arc-shaped connecting pieces 20 are connected and limited by the limiting piece 30. A slide groove 24 is provided on the outer side of the arc-shaped connecting piece 20. The sealing strip 23 is fixed to the inner wall of the slide groove 24 by strong glue. Through grooves 33 are provided on both sides of the limiting piece 30. Rotating shafts are welded and fixed at both ends of the pulley 32. The pulley 32 is embedded in the through groove 33 through the rotating shaft and is rotatably connected to the limiting piece 30.

[0035] When the bottom of the limit member 30 is inserted into the top of the slide groove 24, the limit member 30 is pushed toward the inside of the slide groove 24, so that the bottom of the limit member 30 slides toward the inside of the slide groove 24. When the limit member 30 slides inside the slide groove 24, the pulley 32 will prevent the limit member 30 from getting stuck when sliding into the inside of the slide groove 24.

[0036] Reference Figure 5-6 A small limiting pad 31 is fixed to the outer side of the top of the limiting member 30 by strong glue. When the small limiting pad 31 is engaged and fixed with the top of the slide groove 24, the outer side of the small limiting pad 31 will be tightly engaged with the inner wall of the top of the sealing strip 23. Therefore, when the limiting member 30 completely slides into the slide groove 24, the outer side of the top of the limiting member 30 will be engaged and limited with the top of the slide groove 24.

[0037] Working principle and process of this utility model:

[0038] Open the two arc-shaped connectors 20 and place them on the ground. Place the end of the main bellows 10 with the limiting groove on the inner bellows sealing pad 21. When inserting the main bellows 10, one end of the main bellows 10 should be fitted with one side of the sealing ring 22. Operate the auxiliary bellows 11 in the same way as the main bellows 10, and rotate the arc-shaped connectors 20 clockwise so that one of the arc-shaped connectors 20 covers the outside of the main bellows 10 and the auxiliary bellows 11. Slide the limiting member 30 into the slide groove 24 so that the top of the limiting member 30 is fit and fixed with the top of the slide groove 24. The inner bellows sealing pad 21, the sealing strip 23 and the small limiting pad 31 are all made of soft silicone, so the fit and sealing will be better in later use.

[0039] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A tensile-resistant and highly efficient sealing MPP bellows, characterized by: include; An arc-shaped connecting piece (20), wherein an inner corrugated sealing gasket (21) is fixedly provided on the inner wall of the arc-shaped connecting piece (20), a sealing strip (23) is fixedly provided on the outer side of the arc-shaped connecting piece (20), and a sealing ring (22) is fixedly provided on the inner wall of the middle part of the inner corrugated sealing gasket (21); A limit piece (30) is longitudinally slidably disposed outside the arc-shaped connecting piece (20), a pulley (32) is disposed outside the limit piece (30), and rotating shafts are fixedly disposed at both ends of the pulley (32).

2. The tensile-resistant and highly-efficient sealing MPP bellows according to claim 1 is characterized in that: A connecting shaft is arranged outside the arc-shaped connecting piece (20), and the two arc-shaped connecting pieces (20) are rotatably connected via the connecting shaft, and the two arc-shaped connecting pieces (20) are enclosed to form a circle.

3. The tensile-resistant and highly-efficient sealing MPP bellows according to claim 1 is characterized in that: The outer side of the arc-shaped connecting member (20) is provided with a sliding groove (24), the outer side of the sealing strip (23) is fixedly connected to the inner wall of the sliding groove (24), the limiting member (30) is slidably connected to the arc-shaped connecting member (20) through the sliding groove (24), and the outer side of the limiting member (30) is tightly fitted to the inner wall of the sealing strip (23).

4. The tensile-resistant and highly-sealed MPP bellows according to claim 3 is characterized by: A small limiting pad (31) is fixedly arranged at the bottom of the top of the limiting member (30), the outer side of the small limiting pad (31) is tightly fitted with the inner wall of the top of the sealing strip (23), and through grooves (33) are opened on both sides of the limiting member (30).

5. The tensile-resistant and highly-efficient sealing MPP bellows according to claim 1 is characterized in that: The pulley (32) is rotatably connected to the stopper (30) by being embedded in the inner wall of the through groove (33) via a rotating shaft, and the top of the stopper (30) is fixedly engaged with the top of the slide groove (24).

6. The tensile-resistant and highly-efficient sealing MPP bellows according to claim 1, characterized in that: A main bellows (10) is provided at one end of the arc-shaped connecting piece (20), and a secondary bellows (11) is provided at one end of the main bellows (10).

7. The tensile-resistant and highly-efficient sealing MPP bellows according to claim 6 is characterized in that: Limiting grooves are provided on the outer sides of one end of the main bellows (10) and the auxiliary bellows (11), and the inner wall of the inner bellows sealing gasket (21) is tightly fitted with the limiting grooves.

8. The tensile-resistant and highly-efficient sealing MPP bellows according to claim 6 is characterized in that: One end of the main bellows (10) is tightly fitted to one side of the sealing ring (22), and one end of the auxiliary bellows (11) is tightly fitted to the other side of the sealing ring (22).

Images