Pipeline lining pipe forming die

Abstract

The utility model discloses a pipeline lining pipe forming die which comprises a pipeline, a rubber pipe, a supporting body, a rubber flange gasket, flange plates and a fastening bolt, the flange plates are arranged on the two sides of the pipeline, the rubber pipe is inserted into the pipeline, and a filling cavity used for filling is formed between the rubber pipe and the pipeline. A flange is arranged on one side of the rubber pipe, a straight pipe is arranged on the other side of the rubber pipe, a hole is formed in the center of the rubber flange gasket, the straight pipe side of the rubber pipe is inserted into the rubber flange gasket, the flange plate is arranged on the outer side of the rubber flange gasket, the supporting body is inserted into the rubber pipe, a flange is arranged on one side of the supporting body, and a straight pipe is arranged on the other side of the supporting body. The straight pipe side of the supporting body is inserted into the rubber flange gasket and the flange plate, the fastening bolt is connected with the pipeline and the supporting body as well as the pipeline and the flange plate, the utility model provides the mould for performing pressure forming in the pipeline and manufacturing the UHMWPE lining or the ceramic lining, and the mould is suitable for pipelines with various diameters and lengths.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline lining production, in particular to a pipeline lining pipe forming die. Background Art

[0002] During the use of steel pipes, factors such as high temperature, friction, and corrosion will affect the service life of the steel pipes. By adding lining inside the steel pipes, the service life and scope of use of the steel pipes can be increased. For example, adding ultra-high molecular weight polyethylene fiber lining or ceramic lining to the steel pipes.

[0003] Ultra-high molecular weight polyethylene fiber composite materials have the characteristics of smooth surface, salt corrosion resistance and high impact resistance. Steel pipes lined with ultra-high molecular weight polyethylene fibers have excellent corrosion resistance and impact resistance.

[0004] Ceramic-lined composite steel pipes have excellent wear resistance, heat resistance, mechanical and thermal shock resistance, and are suitable for material transportation occasions with severe wear and erosion, such as coal-fired power generation, metallurgy, mining, geology and other industries. According to the use of industrial sectors such as electricity, coal, and metallurgy for many years, compared with ordinary seamless steel pipes, the service life of ceramic-lined composite steel pipes has increased by 15 times, and it can replace cast stone pipes, alloy pipes, organic material lined pipes, etc., and is an ideal wear-resistant pipe.

[0005] For ultra-high molecular weight polyethylene fiber lining, the lining pipe is generally separately manufactured and then installed in the pipeline.

[0006] There are generally two forms of ceramic linings, one is a one-piece integral ceramic, and the other is a ceramic pipe made of small ceramic pieces. The surface of the spliced ​​ceramic pipe is bumpy and not smooth, and the joints are easily corroded. The technical difficulty of the integral ceramic pipe is relatively large. Generally, the ceramic is formed separately and then installed in the pipe, and a buffer layer is filled between the ceramic and the pipe, or the ceramic lining is made inside the pipe by gel grouting.

[0007] The method of separate molding and then installation has high requirements on the size of the lining. The lining pipe made by pressure molding such as isostatic pressing is generally processed to a certain size by machining equipment before installation, which is costly. Due to the problems of machining accuracy and the dimensional accuracy of the inner wall of the pipe, there is often a gap between the lining and the pipe after installation, forming a weak point. The gel grouting method has low cost, but due to the high glue content in the slurry, the density of the ceramic after molding and the strength of the material are lower than those of the pressure molding method, and the wear resistance and corrosion resistance are low. Utility Model Content

[0008] The utility model aims at the above-mentioned deficiencies in the prior art and provides a pipeline lining tube forming mold. The mold is used in an isostatic pressing device or an autoclave and can perform pressure forming inside the pipeline to finally obtain a dense and high-strength pipeline lining.

[0009] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0010] The utility model discloses a pipeline liner pipe forming mold, comprising a pipeline, a rubber tube, a support body, and a rubber tube inserted into the pipeline, a filling cavity for filling is formed between the rubber tube and the pipeline, one side of the rubber tube is a flange and the other side is a straight tube, the center of the rubber flange gasket is provided with an opening, the straight tube side of the rubber tube is inserted into the rubber flange gasket, the outer side of the rubber flange gasket is the flange plate, the support body is inserted into the rubber tube, one side of the support body is a flange and the other side is a straight tube, the straight tube side of the support body is inserted into the rubber flange gasket and the flange plate, and the fastening bolts connect the pipeline and the support body as well as the pipeline and the flange plate.

[0011] Preferably, the support body is provided with an overflow hole.

[0012] Preferably, the outer diameter of the straight rubber tube is equal to the inner diameter of the rubber flange gasket.

[0013] Preferably, the inner diameter of the rubber tube is equal to the outer diameter of the straight tube portion of the support body.

[0014] Preferably, the lengths of the rubber tube and the support body are greater than the length of the pipeline.

[0015] Preferably, the mold is used for molding in an isostatic pressing device or an autoclave.

[0016] Preferably, the screw holes of the pipeline, the rubber tube, the support body, the rubber flange gasket and the flange plate correspond to each other.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The mold of the utility model provides a method for pressure forming inside a pipe to make a pipe lining, which is suitable for pipes of various diameters and lengths.

[0019] 2. The mold designed by the utility model has a simple structure and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram and a half-section diagram of the overall structure of the utility model;

[0021] Figure 2 It is a disassembly schematic diagram of the structure of the utility model;

[0022] Figure 3 It is a half-section view of the overall structure of the utility model.

[0023] In the figure: 1-pipeline, 2-rubber tube, 3-support body, 4-rubber flange gasket, 5-flange plate, 6-fastening bolts, 7-overflow hole, 8-filling chamber. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] A pipeline liner forming mold comprises a pipeline 1 to be installed with a liner, a rubber tube 2, a support body 3, a rubber flange gasket 4, a flange plate 5, and a fastening bolt 6. Both ends of the pipeline 1 are flanges, one side of the rubber tube 2 is a flange, and the other side is a straight tube. The outer diameter of the straight tube part of the rubber tube 2 is smaller than the inner diameter of the pipeline 1. After the rubber tube 2 is inserted into the interior of the pipeline 1, a certain space, namely a filling cavity 8, is formed between the pipeline 1 and the rubber tube 2. Rubber tubes 2 of different diameters are used according to the thickness of the liner to be formed, thereby controlling the gap of the filling cavity 8.

[0026] One side of the support body 3 is a flange, and the other side is a straight tube. Since the filling cavity 8 will produce a certain deformation after filling, the inner wall of the formed pipe is not smooth. In order to avoid this situation, a support body 3 is inserted into the rubber tube 2. The outer diameter of the support body 3 is equal to the inner diameter of the rubber tube 2, so that the outer wall of the support body 3 fits the inner wall of the rubber tube 2 and forms a strong support for the rubber tube 2 to prevent the rubber tube 2 from deforming after filling. A large number of overflow holes 7 are provided on the support body 3. When the mold is placed in the isostatic pressing equipment for molding, the overflow holes 7 allow the medium in the isostatic pressing equipment to circulate, so that the pressure can be better transmitted to the inner wall of the rubber tube 2.

[0027] The bolt holes on the flanges of the pipeline 1, rubber tube 2 and support body 3 correspond in position and size. The bolt holes of the rubber flange gasket 4 and flange plate 5 also correspond in position and size to the bolt holes of the pipeline 1, and are fixed with fastening bolts 6.

[0028] The straight tube side of the rubber tube 2 is the loading position of the packing cavity 8. After loading, the rubber flange gasket 4 is used for sealing. The inner diameter of the rubber flange gasket 4 is equal to the outer diameter of the rubber tube 2. During molding, the pressure acts on the inner wall of the rubber tube 2, causing the rubber tube 2 to expand outward, and effective extrusion is formed between the rubber tube 2 and the rubber flange gasket 4 to prevent the pressure medium from flowing into the packing cavity 8. In order to further increase the sealing performance of the rubber flange gasket 4, the rubber flange gasket 4 is fixed on the outside with a flange plate 5 and a fastening bolt 6.

[0029] To ensure the sealing of the mold when in use, the length of the rubber tube 2 and the support body 3 should be greater than the length of the pipeline 1.

[0030] When used for ultra-high molecular weight polyethylene fiber (UHMWPE) liner molding, the support body 3 is inserted into the rubber tube 2, and then the UHMWPE composite non-woven fabric is wound on the surface of the rubber tube 2. After winding to a certain thickness, it is inserted into the pipeline 1, and the flange is fixed with the fastening bolts 6 to prevent the pressure medium from flowing into the packing cavity 8. The rubber flange gasket 4 and the flange plate 5 are covered at the opening of the packing cavity 8 and fixed with the fastening bolts 6. After the mold is installed, the mold is placed in a hot isostatic press for hot pressing. Since the molding pressure of UHMWPE is low (15-25MPa), a hot press can can also be used for hot pressing.

[0031] When used for forming ceramic lined pipes, first insert the rubber tube 2 and the support body 3 into the pipe 1, and use the fastening bolts 6 to fix the flange to prevent the pressure medium from flowing into the packing cavity 8. After the installation is completed, fill the upper opening of the packing cavity 8 with an appropriate amount of ceramic granulation powder, use a vibrating table or knock the mold to vibrate the ceramic granulation powder, and repeat the loading and vibrating process until the ceramic granulation powder completely fills the entire packing cavity 8. Cover the opening of the packing cavity 8 with a rubber flange gasket 4 and a flange plate 5, and fix it with fastening bolts 6. After the mold is installed, put the mold into an isostatic press for pressure molding. After the cold isostatic press is used for molding, the molded pipe and ceramic lining are taken out and placed in a sintering furnace for sintering to densify the ceramic. Hot isostatic pressing equipment can also be used directly to complete the preparation of the ceramic lining in a high temperature and high pressure step.

[0032] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A pipeline liner forming mold, characterized in that: It includes a pipeline, a rubber tube, a support body, a rubber flange gasket, a flange plate and fastening bolts. The pipeline has flange plates on both sides. The rubber tube is inserted into the pipeline. A filling cavity for filling is formed between the rubber tube and the pipeline. One side of the rubber tube is a flange and the other side is a straight tube. The rubber flange gasket has an opening in the center. The straight tube side of the rubber tube is inserted into the rubber flange gasket. The outer side of the rubber flange gasket is the flange plate. The support body is inserted into the rubber tube. One side of the support body is a flange and the other side is a straight tube. The straight tube side of the support body is inserted into the rubber flange gasket and the flange plate. The fastening bolts connect the pipeline and the support body as well as the pipeline and the flange plate.

2. A pipeline liner forming mold according to claim 1, characterized in that: The support body is provided with a water overflow hole.

3. A pipeline liner forming mold according to claim 1, characterized in that: The outer diameter of the straight rubber tube is equal to the inner diameter of the rubber flange gasket.

4. A pipeline liner forming mold according to claim 1, characterized in that: The inner diameter of the rubber tube is equal to the outer diameter of the straight tube portion of the support body.

5. The pipeline liner forming mold according to claim 1, characterized in that: The lengths of the rubber tube and the support body are greater than the length of the pipeline.

6. A pipeline liner forming mold according to claim 1, characterized in that: The mold is used for molding in an isostatic pressing device or an autoclave.

7. A pipeline liner forming mold according to claim 1, characterized in that: The screw holes of the pipeline, the rubber tube, the support body, the rubber flange gasket and the flange plate correspond to each other.

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