U-shaped compression device for PE (polyethylene) lined pipeline

Abstract

The utility model discloses a U-shaped compression device for a PE-lined pipeline, and relates to the field of pipeline repair. Comprising a movable supporting frame, a hydraulic deformation ejector rod fixedly connected to the movable supporting frame, a hydraulic shaping device fixedly connected to the movable supporting frame, a limiting fixing belt hung on the movable supporting frame and a hydraulic station connected with the hydraulic deformation ejector rod and the hydraulic shaping device through hydraulic pipes. Wherein the limiting fixing belt is a lifting belt, one end of the limiting fixing belt is located on the outer side of the hydraulic deformation ejector rod and hung on the movable supporting frame, the other end of the limiting fixing belt bypasses the lower portion of the PE pipeline and is hung on an anchor-shaped hook of the hydraulic shaping device, and the longitudinal center line of the hydraulic deformation ejector rod coincides with the longitudinal center line of the PE pipeline. The device is easy to manufacture, easy to obtain materials, convenient to manufacture and install on site and easy to operate, after the diameter of the pipeline is reduced, the penetrating efficiency of the lining is greatly improved, the change of the inner diameter is small, the lining can be tightly attached to the original pipeline, and the water passing capacity is improved.

Description

Technical Field

[0001] The utility model relates to the field of pipeline repair, in particular to a "U"-type compression device for PE-lined pipelines. Background Art

[0002] In the field of pipeline repair, especially for the maintenance of urban infrastructure and industrial pipeline systems, traditional repair methods have some limitations and challenges. Traditional pipeline repair methods may require large-scale excavation work, which is not only costly but also causes damage to the surrounding environment. Common traditional pipeline repair techniques include the lining method, the winding method, and the spraying method. Among them, the lining method repairs the pipeline by installing a new pipeline layer inside the old pipeline, but this method may result in a large loss of pipeline cross-section and requires grouting to fill the annular gap; the winding method strengthens the pipeline structure by winding composite materials on the pipeline surface, but this method has high technical requirements for construction workers and may not be suitable for severely deformed pipelines; the spraying method forms a new protective layer by spraying resin on the inner surface of the pipeline, but the curing of the resin requires a certain amount of time and is difficult to carry out when the pipeline is severely deformed. Existing pipeline compression devices are usually bulky, difficult to disassemble, install, and move, resulting in inconvenient on-site construction and a limited applicable range of pipe diameters, making it difficult to meet the repair requirements of pipelines with different diameters.

[0003] With the acceleration of the urbanization process, trenchless technology has received increasing attention due to its small impact on urban traffic and the environment. Pipeline repair technology needs to develop in the direction of trenchless or minimally invasive to reduce the interference of construction on urban life.

[0004] Chinese Patent with the authorization announcement number CN215791093U discloses a PE pipeline compression device, which includes two rows of side rollers rotatably installed side by side on a mounting frame. Each of the side rollers is vertically placed and connected to the mounting frame through a bearing seat. A channel for the PE pipeline to pass through is formed between the two rows of side rollers. An elevating pressing mechanism for pressing the upper end of the PE pipeline is installed on the mounting frame and above the channel. An adjustable clamping mechanism is installed on the mounting frame and at the inlet end of the channel.

[0005] After the above-mentioned disclosed patent type clamps and positions the PE pipeline through the adjustable clamping mechanism, the two rows of side rollers and the elevating pressing mechanism limit and shape it, so that the PE pipeline forms a "U" shape, which is convenient for the PE pipeline to be transported in the full-section pipeline. However, mechanical compression may not ensure uniform compression of the PE pipeline in the full section, resulting in insufficient fitting degree with the inner wall of the old pipeline.

[0006] In summary, it is particularly important to provide a U-shaped compression device for lined PE pipes that can closely fit the original pipe, has a small inner diameter change, and a stable structure. This not only enables precise control of the PE pipe compression process but also ensures a tight fit between the pipe and the inner wall of the old pipe, thereby improving the performance and durability of the repaired pipe. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a U-shaped compression device for lined PE pipes to solve the problem of the inability to closely fit between the pipe and the inner wall of the old pipe in the prior art.

[0008] To solve the above technical problem, the technical solutions adopted by the present invention are as follows:

[0009] The U-shaped compression device for lined PE pipes includes a movable support frame, a hydraulic deformation jack fixedly connected to the movable support frame, a hydraulic shaping device fixedly connected to the movable support frame, a limit fixing belt hung on the movable support frame, and a hydraulic station connected to the hydraulic deformation jack and the hydraulic shaping device through hydraulic pipes; wherein the limit fixing belt is a lifting belt, one end is located outside the hydraulic deformation jack and hung on the movable support frame, the other end bypasses the lower part of the PE pipe and is hung on the anchor hook of the hydraulic shaping device, and the hydraulic deformation jack coincides with the longitudinal center line of the PE pipe.

[0010] Further preferably, the movable support frame includes an inverted T-shaped column, a cross bar connected to the inverted T-shaped column by a pin, and universal wheels installed at both ends of the bottom of the inverted T-shaped column. Multiple pin holes are provided on the inverted T-shaped column.

[0011] Further preferably, the inverted T-shaped column is formed by welding a bottom cross bar and a vertical vertical bar, and the length of the bottom cross bar is less than the length of the vertical vertical bar.

[0012] Further preferably, the hydraulic deformation jack includes a main oil cylinder and a pressing code. The cylinder body of the main oil cylinder is fixed on the cross bar of the movable support frame, and the end of the piston rod of the main oil cylinder is fixedly welded to the pressing code. The hydraulic shaping device includes a secondary oil cylinder and an anchor hook. The cylinder body of the secondary oil cylinder is fixed on the cross bar of the movable support frame, and the end of the piston rod of the secondary oil cylinder is fixedly welded to the anchor hook.

[0013] Further preferably, the end of the pressing code is bent upwards.

[0014] Further preferably, the universal wheels are provided with locking devices to fix the position of the movable support frame during the compression process.

[0015] The beneficial effects of adopting the above technical solutions are as follows:

[0016] The utility model first realizes the uniform compression of the PE pipeline by setting a hydraulic deformation ejector rod, effectively avoiding pipeline damage and ensuring that the compressed pipeline can closely fit the inner wall of the old pipeline; through the synergistic effect of the limit fixing belt and the hydraulic shaping device, a stable support and accurate positioning are provided for the PE pipeline, enabling the compressed pipeline to accurately penetrate into the inner wall of the old pipeline and achieve close fitting; by setting the universal wheels of the movable support frame, the mobility and on-site adaptability of the device are improved; after the pipeline is reduced in diameter by this device, the lining installation efficiency is greatly improved, the inner diameter change is small, and it can achieve close fitting with the original pipeline, increasing the water passing capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 is Figure 1 an enlarged view of part A in

[0019] In the figure: 1 - movable support frame; 11 - inverted T-shaped column; 12 - cross bar; 2 - hydraulic deformation ejector rod; 21 - main oil cylinder; 22 - pressure code; 3 - hydraulic shaping device; 31 - auxiliary oil cylinder; 32 - anchor-shaped hook; 4 - limit fixing belt; 5 - hydraulic station. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] In order to make the features and advantages of the utility model more obvious and understandable, the technical solution will be clearly and completely described below in conjunction with the drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all of the embodiments. Embodiment 1

[0021] As Figure 1-2 shown, the lining PE pipeline "U"-shaped compression device utilizes the elastic characteristics of the PE pipe to temporarily compress the lined PE pipeline into a "U" shape under hydraulic action. After being bundled and fixed, it can be easily inserted into the old pipeline, and then the deformed pipeline is restored by air pressure or hydraulic pressure, enabling the PE pipe to expand and adhere to the inner wall of the main pipeline to be repaired, forming a "pipe-in-pipe" composite structure that combines the anti-corrosion performance of the PE pipe and the mechanical performance of the original pipeline, thereby achieving the repair purpose of anti-corrosion, wear resistance, and strong water conveyance capacity.

[0022] The device consists of a movable support frame 1, a hydraulic deformation ejector rod 2, a limit fixing belt 4, a hydraulic shaping device 3, and a hydraulic station 5.

[0023] The movable support frame 1 is composed of two inverted T-shaped columns 11, a cross bar 12 and four universal wheels 13. The inverted T-shaped column 11 is formed by welding a bottom cross bar and a vertical vertical bar. The length of the bottom cross bar is less than that of the vertical vertical bar. Preferably, the inverted T-shaped column 11 is formed by welding two square steel pipes of 92 mm (δ = 8 mm). The length of the bottom cross bar is 1500 mm, and the length of the vertical vertical bar is 2000 mm. The cross bar 12 is formed by butt welding two 16Q channel steels, with a length of 1600 mm. The cross bar 12 is connected to the inverted T-shaped column 11 by a pin. There are multiple pin holes on the inverted T-shaped column to adapt to the compression of PE pipes with various diameters.

[0024] The hydraulic deformation ejector rod 2 is formed by welding a main oil cylinder 21 and a pressing code 22. The cylinder body AB of the main oil cylinder 21 is fixed on the cross bar 12 of the movable support frame 1. The main oil cylinder 21 includes a piston rod A and a cylinder body A. The end of the piston rod A is welded to the pressing code 22. Preferably, the pressing code 22 is composed of a φ50 steel pipe (L = 1000 mm), and the end of the steel pipe is bent upward to ensure that the PE pipe is not damaged during pipe pressing.

[0025] The hydraulic shaping device 3 is formed by welding an auxiliary oil cylinder 31 and an anchor-shaped hook 32. The auxiliary oil cylinder 31 includes a piston rod B and a cylinder body B. The cylinder body B of the auxiliary oil cylinder 31 is fixed on the cross bar 12 of the movable support frame 1, and the end of the piston rod B is welded to the anchor-shaped hook 32.

[0026] The limit fixing belt 4 is a lifting belt. One end is located outside the hydraulic deformation ejector rod 2 and is hung on the movable support frame 1, and the other end bypasses the lower part of the PE pipeline and is hung on the anchor-shaped hook 32 of the hydraulic shaping device 3.

[0027] During the construction process, first place the PE pipe to be lined on the limit fixing belt 4, and adjust the tightness by the hydraulic shaping device 3 so that the longitudinal center line of the pipeline coincides with the hydraulic deformation ejector rod 2. Start the hydraulic deformation ejector rod 2. Under the action of pressure, the hydraulic deformation ejector rod 2 uniformly presses the PE pipe from top to bottom. The PE pipe is deformed under pressure and sinks inward to form a "U" shape. During this period, the downward pressing speed of the hydraulic deformation ejector rod 2 should be controlled not to exceed 1 cm / s. When the final sinking position of the hydraulic deformation ejector rod 2 reduces the cross-sectional area of the PE pipe to about 70% of the original, use a positioning pull rope to tie and fix it and insert it into the old pipeline, and then use high-pressure air to expand it so that the outer wall of the PE pipe closely adheres to the inner wall of the old pipeline. Embodiment 2

[0028] The universal wheel 13 is provided with a locking device to fix the position of the movable support frame 1 during the compression process. Embodiment 3

[0029] This device is applicable to the following situations:

[0030] (1)For old municipal or industrial pipelines, the U-shaped compression device for lining PE pipelines can effectively form a new pipeline layer inside the old pipeline, thus restoring its structural integrity and anti-corrosion performance.

[0031] (2)In cases where large-scale excavation works are not desired or possible, this device can compress and pull the PE pipe through the existing pipeline opening to achieve trenchless repair.

[0032] (3)When it is necessary to improve the pipeline transportation capacity or change the pipeline material to meet more stringent usage conditions, this device can be used to compress and line the PE pipe on the inner wall of the old pipeline to achieve the functional upgrade of the pipeline.

[0033] (4)In case of pipeline leakage or other emergencies, this device can respond quickly by compressing the PE pipe and quickly lining it on the damaged pipeline to control the leakage and restore the pipeline function.

[0034] The utility model first realizes the uniform compression of the PE pipeline by setting a hydraulic deformation ejector rod, effectively avoiding pipeline damage and ensuring that the compressed pipeline can closely fit the inner wall of the old pipeline; through the synergistic effect of the limit fixing belt and the hydraulic shaping device, a stable support and accurate positioning are provided for the PE pipeline, enabling the compressed pipeline to accurately penetrate into the inner wall of the old pipeline and achieve a tight fit; by setting the universal wheels of the movable support frame, the mobility and on-site adaptability of the device are improved; after the pipeline is reduced in diameter by this device, the lining installation efficiency is greatly improved, the inner diameter change is small, and a tight fit with the original pipeline can be achieved, increasing the water passing capacity.

[0035] Finally, it should be noted that the above are only the preferred embodiments of the utility model and are not used to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included within the scope of protection of the claims of the utility model.

Claims

1. U-shaped compression device for PE lined pipe, characterized by: The invention comprises a movable support frame (1), a hydraulic deformable push rod (2) fixedly connected to the movable support frame (1), a hydraulic shaper (3) fixedly connected to the movable support frame (1), a position-limiting fixing belt (4) hung on the movable support frame (1), and a hydraulic station (5) connected to the hydraulic deformable push rod (2) and the hydraulic shaper (3) through a hydraulic pipe; wherein the position-limiting fixing belt (4) is a lifting belt, one end of which is located outside the hydraulic deformable push rod (2) and hung on the movable support frame (1), and the other end of which is passed under the PE pipe and hung on the anchor hook (32) of the hydraulic shaper (3), and the hydraulic deformable push rod (2) coincides with the longitudinal center line of the PE pipe.

2. The "U" type compression device for PE lined pipe according to claim 1 is characterized in that: The movable support frame (1) comprises an inverted T-shaped column (11), a crossbar (12) connected to the inverted T-shaped column (11) via a pin, and universal wheels (13) mounted on both ends of the bottom of the inverted T-shaped column (11); a plurality of pin holes are provided on the inverted T-shaped column (11).

3. The "U" type compression device for PE lined pipe according to claim 2 is characterized in that: The inverted T-shaped column (11) is formed by welding a bottom cross bar and a vertical vertical bar, and the length of the bottom cross bar is shorter than the length of the vertical vertical bar.

4. The "U" type compression device for PE lined pipe according to claim 2 is characterized in that: The hydraulic deformable push rod (2) comprises a main oil cylinder (21) and a pressure code (22); the cylinder body of the main oil cylinder (21) is fixed on the cross bar (12) of the movable support frame (1); the end of the piston rod of the main oil cylinder (21) is welded and fixed to the pressure code (22); the hydraulic shaper (3) comprises a sub-oil cylinder (31) and an anchor hook (32); the cylinder body of the sub-oil cylinder (31) is fixed on the cross bar (12) of the movable support frame (1); the end of the piston rod of the sub-oil cylinder (31) is welded and fixed to the anchor hook (32).

5. The "U" type compression device for PE lined pipe according to claim 4 is characterized in that: The end of the pressure code (22) is bent upward.

6. The "U" type compression device for PE lined pipe according to claim 3, characterized in that: The universal wheel (13) is provided with a locking device to fix the position of the movable support frame (1) during the compression process.

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