A hot-melt welding repair device for HDPE lining of oil and gas pipelines

Abstract

This utility model discloses a hot-melt welding repair device for HDPE lining of oil and gas pipelines, including a base plate and a telescopic assembly. The telescopic assembly includes a circular pipe and a sliding rod. One end of the circular pipe has a through hole, and the sliding rod passes through the through hole and is slidably connected to it. A sliding plate is fixed to the end of the sliding rod inside the circular pipe, and a detachable heating assembly is fixedly connected to the end of the sliding rod outside the circular pipe. An air pump for inflating the circular pipe is installed on the upper surface of the base plate. In this utility model, an air pump, a telescopic assembly, a heating assembly, and a control cabinet are provided. First, the heating assembly heats the HDPE material used for repair and the repair position of the lining pipe. Then, the HDPE material is applied to the repair position of the lining pipe. The air pump is started to inflate the telescopic assembly, causing it to extend. The telescopic assembly drives the heating assembly to move, and the heating assembly then presses the HDPE material against the inner wall of the lining pipe, achieving rapid repair.

Description

Technical Field

[0001] This utility model relates to the field of HDPE lining repair technology for pipelines, and in particular to a hot melt welding repair device for HDPE lining of oil and gas pipelines. Background Technology

[0002] Oil and gas pipelines are prone to thinning or leakage due to corrosion and mechanical damage during long-term operation. Traditional repair techniques, such as pipe replacement or steel reinforcement, are costly and time-consuming. High-density polyethylene (HDPE) lining repair technology uses hot-melt welding to attach an HDPE liner to the inner wall of the old pipeline, forming an anti-corrosion sealing layer, which has the advantages of both economy and durability. The core of this technology lies in the hot-melt welding process, which requires heating and softening the HDPE material to achieve a seamless connection. The quality of this process directly affects the sealing performance and pressure resistance of the repaired pipeline.

[0003] Currently, when performing hot-melt welding repairs on HDPE linings, the repair material is manually heated to a molten state using a heating plate. The molten material is then applied to the area to be repaired, and an arc-shaped plate is used to press and hold the molten repair material in place. Due to the confined space inside the pipe, it is inconvenient to use mechanical equipment to press the repair material, so manual pressing is usually used. This method results in low and uneven pressing force, and the welding effect needs further improvement. Therefore, further improvements are required. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a hot-melt welding repair device for HDPE linings of oil and gas pipelines.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a hot-melt welding repair device for HDPE lining of oil and gas pipelines, comprising a base plate and a telescopic assembly, wherein the telescopic assembly comprises a circular pipe and a sliding rod, one end of the circular pipe having a through hole, the sliding rod passing through the through hole and slidably connected to the through hole, a sliding plate fixed to one end of the sliding rod inside the circular pipe, and a detachable heating assembly fixedly connected to one end of the sliding rod outside the circular pipe, an air pump for inflating the circular pipe is installed on the upper surface of the base plate, and a control cabinet is fixed to the other side of the base plate surface, and the air pump is electrically connected to the control cabinet.

[0006] Furthermore, multiple wheels are installed on the lower surface of the base plate.

[0007] Furthermore, an air inlet is provided on the side wall of the circular tube away from the through hole, and an air supply pipe is fixedly connected between the air outlet and the air inlet of the air pump, and a handle is fixed on the outer side wall of the circular tube.

[0008] Furthermore, the slide plate has several annular grooves on its side, and a sealing ring is fixedly engaged inside the annular groove, the sealing ring being in contact with the inner wall of the round tube.

[0009] Furthermore, the heating components are provided in multiple sets, each set of heating components includes an arc-shaped plate, and the arc-shaped plate has a hollow interior design. An electric heating plate is embedded on the upper surface of the arc-shaped plate, and the electric heating plate is electrically connected to the control cabinet through wires. The curvature of the arc-shaped plate in each set of heating components is different.

[0010] Furthermore, a connecting rod is fixed to the lower surface of the arc-shaped plate, and a connecting plate is fixed to the other end of the connecting rod. An end plate is fixedly connected to one end of the sliding rod outside the circular tube. A screw is fixed to the side of the end plate. A connecting hole for the screw to pass through is opened on the side of the connecting plate. A nut is connected to one end of the screw that passes through the connecting hole by a threaded connection.

[0011] Furthermore, a heat insulation block is provided between the connecting plate and the end plate.

[0012] The beneficial effects of this utility model are:

[0013] 1. In use, this utility model is a hot-melt welding repair device for HDPE lining of oil and gas pipelines. It is equipped with an air pump, a telescopic component, a heating component, and a control cabinet. First, the heating component heats the HDPE material used for repair and the repair position of the lining pipe. Then, the HDPE material used for repair is attached to the repair position of the lining pipe. The air pump is started to inflate the telescopic component, causing the telescopic component to extend. The telescopic component drives the heating component to move, and the heating component then presses the HDPE material against the inner wall of the lining pipe to achieve rapid repair.

[0014] 2. When in use, this utility model is a hot melt welding repair device for HDPE lining of oil and gas pipelines, which is equipped with a telescopic component and a heating component. The telescopic component and the heating component are detachably connected. When repairing pipelines of different diameters, heating components with different curvatures can be selected for repair. Attached Figure Description

[0015] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 : Overall schematic diagram of this utility model;

[0017] Figure 2 : Schematic diagram of this utility model and its inner lining tube;

[0018] Figure 3 : A perspective view of the telescopic component of this utility model;

[0019] Figure 4 The present utility model Figure 1 Enlarged view of point A in the middle.

[0020] The attached figures are labeled as follows:

[0021] 1. Base plate; 2. Air pump; 3. Telescopic assembly; 31. Round tube; 32. Through hole; 33. Slide rod; 34. Slide plate; 35. Sealing ring; 36. End plate; 37. Screw; 38. Heat insulation block; 39. Handle; 310. Air inlet; 4. Heating assembly; 41. Arc plate; 42. Electric heating plate; 43. Connecting rod; 44. Connecting plate; 5. Air supply pipe; 6. Control cabinet; 7. Traveling wheels; 8. Inner liner tube. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figures 1-4 As shown, a hot-melt welding repair device for HDPE lining of oil and gas pipelines is disclosed, including a base plate 1 and a telescopic component 3. The telescopic component 3 includes a circular pipe 31 and a sliding rod 33. One end of the circular pipe 31 has a through hole 32. The sliding rod 33 passes through the through hole 32 and is slidably connected to the through hole 32. A sliding plate 34 is fixed to one end of the sliding rod 33 inside the circular pipe 31. A detachable heating component 4 is fixedly connected to the other end of the sliding rod 33 outside the circular pipe 31. An air pump 2 for inflating the circular pipe 31 is installed on the upper surface of the base plate 1. A control cabinet 6 is fixed to the other side of the surface of the base plate 1, and the air pump 2 is electrically connected to the control cabinet 6.

[0024] In this embodiment, the control cabinet 6 is equipped with a storage battery and a control circuit board, and the storage battery supplies power to the air pump 2.

[0025] Multiple wheels 7 are installed on the lower surface of the base plate 1.

[0026] In this embodiment, four wheels 7 are provided on the lower surface of the base plate 1, which enable the device to move inside the pipe.

[0027] An air inlet 310 is provided on the side wall of the end of the round tube 31 away from the through hole 32. An air supply pipe 5 is fixedly connected between the air outlet of the air pump 2 and the air inlet 310. A handle 39 is fixed on the outer side wall of the round tube 31.

[0028] After the air pump 2 is started, air can be injected into the circular tube 31 through the air supply pipe 5, thereby pushing the slide rod 33 and the sliding plate 34 to move inside the circular tube 31. This causes the slide rod 33 to extend out of the circular tube 31, thereby moving the heating component 4. A three-way valve is provided at the end of the air supply pipe 5 near the air pump 2. By opening the three-way valve, the air inside the circular tube 31 can be discharged, thereby causing the slide rod 33 to retract into the circular tube 31. This achieves the extension and retraction of the telescopic component 3.

[0029] The slide plate 34 has several annular grooves on its side, and a sealing ring 35 is fixedly engaged inside the annular groove. The sealing ring 35 fits against the inner wall of the round tube 31.

[0030] By setting a sealing ring 35, the sealing performance between the slide plate 34 and the inner wall of the round tube 31 can be increased.

[0031] The heating components 4 are provided in multiple groups. Each heating component 4 includes an arc plate 41 with a hollow interior. An electric heating plate 42 is embedded on the upper surface of the arc plate 41. The electric heating plate 42 is electrically connected to the control cabinet 6 via wires. The curvature of the arc plate 41 in each heating component 4 is different.

[0032] In this embodiment, the electric heating plate 42 is powered by a battery inside the control cabinet 6 and its start and stop are controlled by an internal control circuit board. The wires of the electric heating plate 42 are detachably connected to the control circuit board. When the electric heating plate 42 is started, it can be used to melt the pipe lining and the repair material.

[0033] A connecting rod 43 is fixed to the lower surface of the arc plate 41, and a connecting plate 44 is fixed to the other end of the connecting rod 43. An end plate 36 is fixedly connected to the end of the slide rod 33 located outside the round tube 31. A screw 37 is fixed to the side of the end plate 36. A connecting hole for the screw 37 to pass through is opened on the side of the connecting plate 44. A nut is connected to the end of the screw 37 that passes through the connecting hole by a thread.

[0034] When it is necessary to replace the heating component 4, unscrew the nut on the screw 37, and then separate the connecting plate 44 from the screw 37 to disassemble the heating component 4. Then replace it with another heating component 4 by fitting the connecting hole on the connecting plate 44 of the heating component 4 onto the screw 37 on the surface of the end plate 36, and then screwing the nut on the screw 37.

[0035] A heat insulation block 38 is provided between the connecting plate 44 and the end plate 36. By providing the heat insulation block 38, the connecting plate 44 and the end plate 36 are separated, preventing the heat from the electric heating plate 42 from being transferred to the telescopic assembly 3.

[0036] Working principle: Move the device to the location to be repaired inside the pipeline, and then clean the location. After cleaning, first activate the electric heating plate 42 and attach it to the repair location to heat and melt the inner liner tube 8. After heating, remove the electric heating plate 42 from the inner liner tube 8, and then attach the repair material to the surface of the electric heating plate 42. Use the electric heating plate 42 to heat and melt the repair material, and then attach the repair material to the repair location of the inner liner tube 8. At this time, hold the handle 39 to activate the air pump 2, so that the telescopic component 3 extends until the round tube 31 abuts against the other side of the inner liner tube 8, thereby using the telescopic component 3 to squeeze and press the heating component 4 tightly. After holding for a specified time, control the telescopic component 3 to shorten and remove the heating component 4 and the telescopic component 3.

[0037] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A hot-melt welding repair device for HDPE lining of oil and gas pipelines, characterized in that: The device includes a base plate (1) and a telescopic assembly (3). The telescopic assembly (3) includes a round tube (31) and a sliding rod (33). One end of the round tube (31) has a through hole (32). The sliding rod (33) passes through the through hole (32) and is slidably connected to the through hole (32). One end of the sliding rod (33) inside the round tube (31) is fixed with a sliding plate (34). The other end of the sliding rod (33) outside the round tube (31) is fixedly connected with a detachable heating assembly (4). An air pump (2) for inflating the round tube (31) is installed on the upper surface of the base plate (1). A control cabinet (6) is fixed on the other side of the surface of the base plate (1), and the air pump (2) is electrically connected to the control cabinet (6).

2. The hot-melt welding repair device for HDPE lining of oil and gas pipelines according to claim 1, characterized in that: Multiple wheels (7) are installed on the lower surface of the base plate (1).

3. The hot-melt welding repair device for HDPE lining of oil and gas pipelines according to claim 1, characterized in that: An air inlet (310) is provided on the side wall of the end of the round tube (31) away from the through hole (32). An air supply pipe (5) is fixedly connected between the air outlet of the air pump (2) and the air inlet (310). A handle (39) is fixed on the outer side wall of the round tube (31).

4. The hot-melt welding repair device for HDPE lining of oil and gas pipelines according to claim 1, characterized in that: The slide plate (34) has several annular grooves on its side, and a sealing ring (35) is fixed inside the annular groove. The sealing ring (35) is in contact with the inner wall of the round tube (31).

5. The hot-melt welding repair device for HDPE lining of oil and gas pipelines according to claim 1, characterized in that: The heating components (4) are provided in multiple groups. Each group of heating components (4) includes an arc plate (41) with a hollow interior. An electric heating plate (42) is embedded on the upper surface of the arc plate (41). The electric heating plate (42) is electrically connected to the control cabinet (6) via wires. The curvature of the arc plate (41) in each group of heating components (4) is different.

6. The hot-melt welding repair device for HDPE lining of oil and gas pipelines according to claim 5, characterized in that: A connecting rod (43) is fixed on the lower surface of the arc plate (41), and a connecting plate (44) is fixed on the other end of the connecting rod (43). An end plate (36) is fixedly connected to one end of the slide rod (33) outside the round tube (31). A screw (37) is fixed on the side of the end plate (36). A connecting hole for the screw (37) to pass through is opened on the side of the connecting plate (44). A nut is connected to one end of the screw (37) that passes through the connecting hole by a thread.

7. The hot-melt welding repair device for HDPE lining of oil and gas pipelines according to claim 6, characterized in that: A heat insulation block (38) is provided between the connecting plate (44) and the end plate (36).

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