Stainless steel expansion ring for repairing underwater large-diameter GRP pipeline

Abstract

The utility model relates to a stainless steel expansion ring for repairing an underwater large-diameter GRP (glass reinforced plastic) pipeline, which comprises a plurality of stainless steel expansion ring splicing pieces, bolt fasteners and rubber washers, and the stainless steel expansion ring splicing pieces are connected and fixed through the bolt fasteners to form a circular stainless steel expansion ring. A rubber gasket is arranged on the outer side of the circumference of each round stainless steel expansion ring, two water stop belts are arranged on the back face of the rubber gasket, the rubber gasket is supported by the two round stainless steel expansion rings, and the two water stop belts are tightly attached to the inner wall of the GRP pipeline. According to the utility model, the stainless steel expansion ring is designed into a spliced structure, so that on one hand, the underwater operation difficulty of a diver can be reduced, an operator can conveniently connect and splice, and on the other hand, the designed stainless steel expansion ring is mounted at the joint of the GRP pipeline, and overlarge pipe seams or staggered seams are blocked by using the rubber gasket; therefore, the use effect of the GRP pipeline is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of GRP pipeline repair design, and more specifically to a stainless steel expansion ring used for repairing underwater large-diameter GRP pipelines. Background Art

[0002] Glass fiber reinforced plastic pipe, referred to as GRP pipe, is a new type of composite material pipe. Due to its excellent corrosion resistance, light weight and high strength, large conveying flow, easy installation, short construction period and low comprehensive investment, it has become one of the best choices in the field of water supply and drainage engineering.

[0003] At present, the existing large-scale GRP water supply and drainage pipes are generally more than 3 meters in diameter and are all submarine pipes. During construction, it was found through exploration that the pipe joints have excessively large or misaligned seams. However, since GRP pipes cannot be paste-coated or bonded underwater, how to seal the excessively large pipe seams and misaligned joints has become a technical problem that needs to be solved urgently in the industry. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a stainless steel expansion ring for repairing underwater large-diameter GRP pipes. The stainless steel expansion ring is designed as a splicing structure, which can reduce the difficulty of operation for divers and facilitate operators to connect and assemble. At the same time, the designed stainless steel expansion ring can be used to repair excessive or misaligned pipe seams at GRP pipe joints.

[0005] The utility model solves the technical problem by adopting the technical solution of: constructing a stainless steel expansion ring for repairing underwater large-diameter GRP pipes, comprising a plurality of stainless steel expansion ring splicing pieces, bolt fasteners and rubber washers, wherein the stainless steel expansion ring splicing pieces are connected and fixed by the bolt fasteners to form a circular stainless steel expansion ring, and a rubber washers is arranged on the outer side of the circumference of the circular stainless steel expansion ring.

[0006] According to the above scheme, there are four stainless steel expansion ring splicing pieces, which are connected end to end in sequence to form a circular stainless steel expansion ring, and the end connections of the stainless steel expansion ring splicing pieces are connected and fixed by the bolt fasteners.

[0007] According to the above scheme, the bolt fastener includes a fixing gasket and a fixing bolt. The fixing gasket is arranged at the joint of the adjacent stainless steel expansion rings. The fixing gasket and the stainless steel expansion ring are connected and fixed by the fixing bolt.

[0008] According to the above solution, the rubber gasket is arranged outside the circumference of the circular stainless steel expansion ring.

[0009] According to the above solution, the rubber gasket is annular and has two waterstop strips on the back of the rubber gasket.

[0010] According to the above solution, the rubber gasket is made of chlorobutyl rubber.

[0011] The implementation of the stainless steel expansion ring for underwater large-diameter GRP pipeline repair of the utility model has the following beneficial effects:

[0012] The utility model is a stainless steel expansion ring used for repairing underwater large-diameter GRP pipes. The stainless steel expansion ring is designed to be a spliced ​​structure (assembled together through stainless steel expansion ring splicing pieces). This can reduce the difficulty of operation for divers (because the volume and mass of each stainless steel expansion ring splicing piece are relatively small) and facilitate operators to connect and assemble. At the same time, the designed stainless steel expansion ring is installed at the GRP pipe joint to repair the excessively large or misaligned pipe seams at the GRP pipe joint, and the rubber gasket is used to seal the excessively large pipe seams or misaligned seams. At the same time, the two waterstops on the back of the rubber gasket are tightly attached to the inner wall of the GRP pipe, which enhances the sealing performance of the rubber gasket, thereby ensuring the use effect of the GRP pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0014] Figure 1 This is a schematic diagram of the overall structure of a stainless steel expansion ring used for repairing underwater large-diameter GRP pipes in the utility model;

[0015] Figure 2 This utility model Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0016] In the figure: 1. Rubber gasket; 2. Stainless steel expansion ring bolt fastener; 2.1. Stainless steel expansion ring splicing piece; 2.2. Fixed gasket; 2.3. Fixed bolt; 3. Stainless steel expansion ring; 4. Waterstop. DETAILED DESCRIPTION

[0017] In order to have a clearer understanding of the technical features, purposes and effects of the present utility model, the specific implementation methods of the present utility model are now described in detail with reference to the accompanying drawings.

[0018] like Figure 1 and Figure 2 As shown, the stainless steel expansion ring for underwater large-diameter GRP pipe repair of the utility model comprises a plurality of stainless steel expansion ring splicing pieces 2.1, and the plurality of stainless steel expansion ring splicing pieces 2.1 are assembled together through stainless steel expansion ring bolt fasteners 2 to form a circular stainless steel expansion ring 3.

[0019] In this embodiment, there are four stainless steel expansion ring splicing pieces 2.1, which are connected and fixed end to end by stainless steel expansion ring bolt fasteners 2 to form a circular stainless steel expansion ring 3. When in use, the four stainless steel expansion ring splicing pieces 2.1 are first transported into the GRP pipe, and then assembled together with the stainless steel expansion ring bolt fasteners 2. Because the volume and mass of each stainless steel expansion ring splicing piece 2.1 are relatively small, it is convenient for operators to install it underwater.

[0020] A rubber gasket 1 is arranged on the outer side of the circumference of the circular stainless steel expansion ring 3. Two waterstop strips 4 are arranged on the back of the rubber gasket 1 to be tightly attached to the inner wall of the GRP pipe. The two waterstop strips 4 are respectively arranged on the two side edges outside the circumference of the annular rubber gasket 1. Such a sealing design can ensure the water-stopping effect of the circular rubber gasket 1.

[0021] The rubber gasket 1 is annular and supported by a circular stainless steel expansion ring 3 and fits tightly against the inner wall of the GRP pipe.

[0022] In this embodiment, the stainless steel expansion ring bolt fastener 2 can realize the connection and fixation of the four stainless steel expansion ring splicing parts 2.1 and ensure the connection effect. The rubber gasket 1 is made of chlorobutyl rubber. Since this product will be in contact with seawater for a long time, the rubber gasket 1 is made of chlorobutyl rubber to increase the durability of the rubber gasket. At the same time, chlorobutyl rubber has better acid and alkali resistance.

[0023] In this embodiment, the stainless steel expansion ring splicing parts 2.1 are assembled together to form a circular stainless steel expansion ring 3. This can reduce the difficulty of installation and operation for divers underwater. At the same time, the rubber gasket 1 is supported and installed at the GRP pipe joint through the designed stainless steel expansion ring 3, which can realize the repair of excessive or misaligned pipe seams at the GRP pipe joint. At the same time, the two waterstop strips on the back of the rubber gasket 1 are tightly attached to the inner wall of the GRP pipe, which enhances the sealing performance of the rubber gasket 1, thereby ensuring the use effect of the GRP pipe.

[0024] The embodiments of the utility model are described above in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the utility model, ordinary technicians in this field can also make many forms without departing from the scope of protection of the utility model and the claims, which all fall within the protection of the utility model.

Claims

1. A stainless steel expansion ring for underwater large diameter GRP pipe repair, characterized in that: It comprises a plurality of stainless steel expansion ring splicing pieces, bolt fasteners and rubber washers. The stainless steel expansion ring splicing pieces are connected and fixed by the bolt fasteners to form a circular stainless steel expansion ring. A rubber washers is arranged on the outer side of the circumference of the circular stainless steel expansion ring.

2. The stainless steel expansion ring for underwater large diameter GRP pipeline repair according to claim 1 is characterized in that: There are four stainless steel expansion ring splicing pieces, which are connected end to end in sequence to form a circular stainless steel expansion ring. The end to end connections of the stainless steel expansion ring splicing pieces are connected and fixed by the bolt fasteners.

3. The stainless steel expansion ring for underwater large diameter GRP pipeline repair according to claim 2 is characterized in that: The bolt fastener comprises a fixing gasket and a fixing bolt. The fixing gasket is arranged at the joint of the adjacent stainless steel expansion rings. The fixing gasket and the stainless steel expansion ring are connected and fixed by the fixing bolt.

4. The stainless steel expansion ring for underwater large diameter GRP pipeline repair according to claim 1 is characterized in that: The rubber gasket is annular and has two waterstops on the back side.

5. The stainless steel expansion ring for underwater large diameter GRP pipeline repair according to claim 1 is characterized in that: The rubber gasket is made of chlorobutyl rubber.

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