An inner heating type material tray for a plastic lined pipe

Abstract

The utility model discloses an inner heat formula tray of plastic lined pipe, including support frame and rotatablely erecting the tray on support frame, be provided with the air inlet block for plugging the end of plastic lined pipe and be used for the clamping mechanism of tightly clamping on the air inlet block of plastic lined pipe on the tray, the plugging end of air inlet block is provided with the air inlet, and sets up towards the winding direction of tray, and the position of air inlet block away from the plugging end has the air inlet that is communicated with the air inlet and is arranged, still including the air inlet pipe that is coaxial with tray, and one end of air inlet pipe is connected with air inlet through pipeline towards the middle part of tray, and the other end is worn out tray for connecting steam source, and at least one end of air inlet pipe has rotatable swivel joint, makes both ends of air inlet pipe keep intercommunication under the rotation state of tray. The utility model has the advantages of reasonable structure design, need not to carry out additional processing to plastic lined pipe, can heat the inside of plastic lined pipe, is favorable to saving process and reducing cost etc.

Description

Technical Field

[0001] This utility model relates to the field of pipe processing technology, and in particular to an internally heated material tray for a plastic-lined pipe. Background Technology

[0002] Plastic-lined pipes, also known as thermoplastic molded pipes or thermoplastic inner-lined pipes, are made of a chemically stable thermoplastic engineering plastic lining, formed by cold drawing or rotational molding. After processing in the factory, the plastic-lined pipes are directly wound onto a reel, where they are laminated together under heat to form a flat shape. Upon cooling, the plastic-lined pipes harden at room temperature, making them impossible to pull directly from the reel. During construction, the plastic-lined pipes on the reel need to be steam-heated to soften before being pulled out for application. Chinese patent literature discloses a heating and unwinding device for thermoplastic molded pipes, publication number CN119429882A. This device includes a closing assembly for closing the pipe opening and a vent on the pipe wall. The vent is connected to hot steam from a steam generator via a connecting assembly, allowing the hot steam to enter the interior of the pipe and heat it. While this method achieves good heating results, it requires pre-processing vents on the pipe wall. In practice, to facilitate the connection between the vent and the connecting pipe assembly, a corresponding connector must be provided at the vent. This not only increases the processing steps for both the vent and the connector but also increases the cost of the connector. In addition, opening a vent in the wall of the plastic-lined pipe will damage the pipe wall, making the perforated section unusable as a liner, indirectly reducing the effective length of the plastic-lined pipe. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is: how to provide an internally heated material tray with a reasonable structural design that does not require additional processing of the plastic-lined tube, can heat the inside of the plastic-lined tube, and is conducive to saving processes and reducing costs.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: An internally heated material tray for a plastic-lined pipe includes a support frame and a material tray rotatably mounted on the support frame. The material tray is provided with an air inlet plug for plugging the end port of the plastic-lined pipe and a clamping mechanism for tightly clamping the plastic-lined pipe onto the air inlet plug. The plugging end of the air inlet plug is provided with an air inlet hole and is arranged in the winding direction of the material tray. The air inlet plug has an air inlet port communicating with the air inlet hole at a position away from the plugging end. It also includes an air inlet pipe coaxially arranged with the material tray. One end of the air inlet pipe facing the middle of the material tray is connected to the air inlet port through a pipeline, and the other end extends out of the material tray for connecting to a steam source. At least one end of the air inlet pipe has a rotatable rotary joint so that the two ends of the air inlet pipe remain connected when the material tray is rotating.

[0005] Using the above structure, after the plastic-lined tubes emerge from the production line, the end ports are first fitted onto the air inlet plugs, and a clamping mechanism is used to tightly clamp the plastic-lined tubes onto the air inlet plugs. Then, the plastic-lined tubes are wound onto the material tray. The plastic-lined tubes are laminated together to form a flat shape, with interconnected gaps remaining in the internal folds. During unwinding, a steam generator is connected to the air inlet pipe via a pipeline, and steam is directly delivered to the interior of the plastic-lined tubes through the air inlet pipe and the air inlet holes on the air inlet plugs. This allows the steam to circulate through the air in the folds of the plastic-lined tubes, internally heating them. This structure eliminates the need to machine vent holes into the plastic-lined tubes or install additional joints, saving related processes and reducing production costs. Simultaneously, this structure enables non-destructive installation of the plastic-lined tubes, maximizing the effective length of the tubes and preventing waste, thus contributing to cost savings.

[0006] Furthermore, the air intake block is generally flat in the axial direction of the material tray, and the clamping mechanism includes two clamping strips that are integrally arranged along the axial direction of the material tray. The length of the clamping strips is greater than the width of the air intake block, and they are arranged on both sides of the thickness direction of the air intake block. The two ends of the two clamping strips are locked together by bolts.

[0007] This allows the intake block to be flat, similar to the shape of the laminated plastic-lined pipe, thus minimizing the volume of the intake block while still meeting the plugging requirements.

[0008] Furthermore, the thickness of the intake plug gradually decreases along the direction towards the plug end, forming a wedge-shaped structure.

[0009] This makes it easier to fit the plastic-lined tube onto the intake plug.

[0010] Furthermore, the air intake block is made of rubber and has an embedded liner made of hard material, with the air intake hole located on the liner.

[0011] In this way, the elasticity of the rubber allows the clamping mechanism to better fit between the plastic-lined pipe and the air inlet plug when tightening the clamping mechanism, reducing gaps and minimizing steam loss. Furthermore, placing the air inlet on the embedded rigid material liner provides support, preventing the air inlet from being forced shut by the clamping force and ensuring reliable steam delivery.

[0012] Furthermore, the material tray has a coaxially fixed support shaft in the middle, and is rotatably mounted on the support frame via the support shaft; the air inlet pipe is coaxially disposed inside the support shaft, and the support shaft has a mounting hole corresponding to the inner end of the air inlet pipe, and the air inlet pipe is connected to the air inlet of the air inlet block through the mounting hole; the other end of the air inlet pipe extends out of the support shaft and is provided with the rotary joint.

[0013] In this way, the air inlet pipe is located inside the support shaft and rotates with it. That is, both the air inlet pipe and the air inlet plug rotate with the material tray, remaining relatively stationary. They can be directly connected by a pipeline without the need for relative rotation. The other end of the air inlet pipe passes through the support shaft and is equipped with a rotary joint, which allows it to be connected to the steam generator. This ensures both the normal rotation of the material tray and the continuous supply of steam.

[0014] Furthermore, two coaxially arranged cantilever support shafts are fixedly installed on the support frame, and the two ends of the material tray are rotatably mounted on the corresponding cantilever support shafts through bearings; the air inlet pipe is coaxially arranged inside the cantilever support shaft, and the rotary joint is installed at one end facing inward, and the rotary joint is connected to the air inlet of the air inlet block; the other end of the air inlet pipe extends out of the cantilever support shaft.

[0015] In this way, the cantilever support shaft is fixed on the support frame, while the air inlet pipe is located inside the cantilever support shaft. That is, the air inlet pipe itself does not rotate with the material tray, but the air inlet plug rotates with the material tray. By installing a rotary joint at the inner end of the air inlet pipe and connecting it to the air inlet of the air inlet plug, the air inlet plug can be rotated relative to the air inlet pipe while maintaining communication between the two.

[0016] Furthermore, the material tray includes a winding drum that is cylindrical in shape, with protective discs coaxially arranged at both ends of the winding drum, and the air inlet block and the clamping mechanism are disposed inside the winding drum; the winding drum has a material passage gap for the plastic-lined tube to pass through.

[0017] Furthermore, the winding cylinder includes several support rings spaced apart along the axial direction and support plates arranged along the axial direction. Multiple support plates are distributed around the support rings and fixed on the support rings. The material passage gap is the gap between two adjacent support plates.

[0018] Furthermore, one side of the clamping mechanism or air inlet block is fixedly mounted on the material tray.

[0019] In summary, this utility model has the advantages of reasonable structural design, no need for additional processing of the plastic-lined pipe, ability to heat the inside of the plastic-lined pipe, and the ability to save processes and reduce costs. Attached Figure Description

[0020] Figure 1 and Figure 2 This is a schematic diagram of the overall structure of the material tray in this embodiment.

[0021] Figure 3 This is a schematic diagram of the winding drum.

[0022] Figure 4 This is a schematic diagram of the intake block and clamping mechanism. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the embodiments.

[0024] In practical implementation: such as Figures 1-4 As shown, an internally heated material tray for a plastic-lined pipe includes a support frame and a material tray 1 rotatably mounted on the support frame. The material tray 1 is equipped with an air inlet plug 3 for blocking the end opening of the plastic-lined pipe and a clamping mechanism 5 for tightly clamping the plastic-lined pipe onto the air inlet plug 3. Figure 4 As shown, one side of the air inlet plug 3 is fixedly mounted on the material tray 1 by an integrally Z-shaped bracket; the plug end of the air inlet plug 3 is provided with an air inlet hole 31 and is arranged in the winding direction of the material tray 1; the air inlet plug 3 has an air inlet port that communicates with the air inlet hole 31 at a position away from the plug end; it also includes an air inlet pipe 2 coaxially arranged with the material tray 1, one end of the air inlet pipe 2 facing the middle of the material tray 1 is connected to the air inlet port through a pipeline, and the other end extends out of the material tray 1 for connecting to a steam source; at least one end of the air inlet pipe 2 has a rotatable rotary joint so that the two ends of the air inlet pipe 2 remain connected when the material tray 1 is rotating.

[0025] In this embodiment, the air inlet plug 3 is generally flat along the axial direction of the material tray 1. The clamping mechanism 5 includes two clamping strips 51 integrally arranged along the axial direction of the material tray 1. The length of the clamping strips 51 is greater than the width of the air inlet plug 3, and they are arranged on both sides of the thickness direction of the air inlet plug 3. One of the clamping strips 51 is fixed to the material tray 1. The two ends of the two clamping strips 51 are locked together by bolts. Making the air inlet plug flat can be similar to the shape of the laminated plastic-lined pipe, thereby minimizing the volume of the air inlet plug while meeting the plugging requirements.

[0026] To facilitate easier fitting of the plastic-lined tube onto the air inlet plug, the thickness of the air inlet plug 3 gradually decreases towards the plugging end, forming a wedge-shaped structure. Simultaneously, the air inlet plug 3 is made of rubber and has an embedded liner 32 made of a rigid material, with the air inlet 31 located on the liner 32. This elasticity of rubber allows for a better fit between the plastic-lined tube and the air inlet plug when the clamping mechanism tightens it, reducing gaps and minimizing steam loss. Furthermore, placing the air inlet on the embedded rigid liner provides support, preventing the air inlet from being forced closed under clamping force and ensuring reliable steam delivery. For example, the air inlet plug 3 could use rigid rubber as the liner, covered with a soft, elastic rubber layer, with the air inlet 31 located on the rigid rubber. Alternatively, a steel pipe could be installed at the air inlet 31 as further support for the air inlet pipe; these are all possible implementation methods.

[0027] The material tray 1 has a coaxially fixed support shaft in its middle, and is rotatably mounted on the support frame via the support shaft. The air inlet pipe 2 is coaxially disposed inside the support shaft, and the support shaft has a mounting hole corresponding to the inner end of the air inlet pipe 2. The air inlet pipe 2 is connected to the air inlet of the air inlet block 3 through the mounting hole. The other end of the air inlet pipe 2 extends out of the support shaft and is provided with the rotary joint (not shown in the figure). In this way, the air inlet pipe is disposed inside the support shaft and rotates with the support shaft, that is, the air inlet pipe and the air inlet block rotate together with the material tray, while the two remain relatively stationary. They can be directly connected by a pipeline without the need for relative rotation. The other end of the air inlet pipe extends out of the support shaft and is provided with the rotary joint, so that it can be connected to the steam generator through the rotary joint, which ensures both the normal rotation of the material tray and the continuous supply of steam.

[0028] In this embodiment, as Figure 3 As shown, the material tray 1 includes a cylindrical winding drum 11. The winding drum 11 has coaxially arranged protective discs 12 at both ends. The air inlet block 3 and the clamping mechanism 5 are disposed inside the winding drum 11. The winding drum 11 has a material passage gap for the plastic-lined tube to pass through. By placing the air inlet block 3 and the clamping mechanism 5 inside the winding drum 11, the internal space of the winding drum 11 can be fully utilized. Specifically, the winding drum 11 includes several axially spaced support rings and axially arranged support plates. Multiple support plates are distributed circumferentially along the support rings and fixed to them. The material passage gap is the gap between two adjacent support plates.

[0029] Using the tray structure of this embodiment, after the plastic-lined tube comes out of the production line, its end is first inserted into the winding drum 11 through the material passage gap and then fitted onto the air inlet plug. A clamping mechanism is used to tightly clamp the plastic-lined tube onto the air inlet plug. Then, the tray is rotated, winding the plastic-lined tube onto the tray. The plastic-lined tubes are laminated together to form a flat shape, while the internal folds still have interconnected gaps. During construction, a steam generator is connected to the rotary joint at the outer end of the air inlet pipe via a pipeline. Steam is directly delivered to the interior of the plastic-lined tube through the air inlet pipe and the air inlet hole on the air inlet plug, allowing steam to circulate through the air in the folds of the plastic-lined tube, internally heating it. After the plastic-lined tube softens, it is pulled out of the tray for further construction. The tray of this embodiment enables non-destructive installation of the plastic-lined tube, maximizing the effective length of the plastic-lined tube, preventing waste, and saving costs. There is no need to process ventilation holes on the plastic-lined pipe or set up additional joints, which saves related processes and reduces production costs.

[0030] Of course, in specific implementations, other structural forms can be adopted between the material tray and the support frame. For example, two coaxially arranged cantilever support shafts can be fixedly installed on the support frame, and the two ends of the material tray 1 are rotatably mounted on the corresponding cantilever support shafts via bearings; the air inlet pipe 2 is coaxially arranged inside the cantilever support shaft, and the inward end is equipped with the rotary joint, which is connected to the air inlet port of the air inlet block 3; the other end of the air inlet pipe 2 extends out of the cantilever support shaft. In this way, the cantilever support shaft is fixed on the support frame, while the air inlet pipe is located inside the cantilever support shaft, meaning that the air inlet pipe itself does not rotate with the material tray, while the air inlet block rotates with the material tray. By setting a rotary joint at the inner end of the air inlet pipe and connecting it to the air inlet port of the air inlet block, the air inlet block can be rotated relative to the air inlet pipe while maintaining communication between the two.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A heated material tray for a plastic-lined pipe, comprising a support frame and a material tray (1) rotatably mounted on the support frame, characterized in that, The material tray (1) is provided with an air inlet plug (3) for plugging the end of the plastic-lined pipe and a clamping mechanism (5) for clamping the plastic-lined pipe on the air inlet plug (3); the plugging end of the air inlet plug (3) is provided with an air inlet hole (31) and is arranged in the winding direction of the material tray (1); the position of the air inlet plug (3) away from the plugging end has an air inlet that communicates with the air inlet hole (31); it also includes an air inlet pipe (2) coaxially arranged with the material tray (1), one end of the air inlet pipe (2) facing the middle of the material tray (1) is connected to the air inlet through a pipeline, and the other end extends out of the material tray (1) for connecting to a steam source; at least one end of the air inlet pipe (2) has a rotatable rotary joint so that the two ends of the air inlet pipe (2) remain connected when the material tray (1) is rotating.

2. The internally heated material tray for the plastic-lined pipe as described in claim 1, characterized in that, The air intake block (3) is flat in the axial direction of the material tray (1). The clamping mechanism (5) includes two clamping strips (51) that are integrally arranged along the axial direction of the material tray (1). The length of the clamping strips (51) is greater than the width of the air intake block (3) and they are arranged on both sides of the thickness direction of the air intake block (3). The two ends of the two clamping strips (51) are locked together by bolts.

3. The internally heated material tray for the plastic-lined pipe as described in claim 2, characterized in that, The thickness of the intake plug (3) gradually decreases along the direction toward the plug end, forming a wedge-shaped structure.

4. The internally heated material tray of the plastic-lined pipe as described in claim 1, characterized in that, The air intake block (3) is made of rubber and has a liner (32) made of hard material embedded inside, and the air intake hole (31) is provided on the liner (32).

5. The internally heated material tray for the plastic-lined pipe as described in claim 1, characterized in that, The material tray (1) has a support shaft fixedly arranged coaxially in the middle, and is rotatably mounted on the support frame through the support shaft; the air inlet pipe (2) is coaxially arranged inside the support shaft, and the support shaft has an installation hole corresponding to the inner end of the air inlet pipe (2), and the air inlet pipe (2) is connected to the air inlet of the air inlet block (3) through the installation hole; the other end of the air inlet pipe (2) passes through the support shaft and is provided with the rotary joint.

6. The internally heated material tray for the plastic-lined pipe as described in claim 1, characterized in that, Two coaxially arranged cantilever support shafts are fixedly installed on the support frame. The two ends of the material tray (1) are rotatably arranged on the corresponding cantilever support shafts through bearings. The air inlet pipe (2) is coaxially arranged inside the cantilever support shaft, and the rotary joint is installed at one end facing inward. The rotary joint is connected to the air inlet of the air inlet block (3). The other end of the air inlet pipe (2) passes through the cantilever support shaft.

7. The internally heated material tray for the plastic-lined pipe as described in claim 1, characterized in that, The material tray (1) includes a winding tube (11) that is cylindrical in shape. The winding tube (11) has protective discs (12) arranged coaxially at both ends. The air inlet block (3) and the clamping mechanism (5) are arranged inside the winding tube (11). The winding tube (11) has a material passage gap for the plastic-lined tube to pass through.

8. The internally heated material tray for the plastic-lined tube as described in claim 7, characterized in that, The winding cylinder (11) includes several support rings spaced apart along the axial direction and support plates arranged along the axial direction. Multiple support plates are distributed around the support rings and fixed on the support rings. The material passage gap is the gap between two adjacent support plates.

9. The internally heated material tray for the plastic-lined pipe as described in claim 1, characterized in that, One side of the clamping mechanism (5) or the air inlet block (3) is fixedly installed on the material tray (1).

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