A hot melt device for installing a prefabricated thermal insulation compensation structure for a pipeline

Abstract

The present invention relates to the field of plastic material forming connection and hot melt equipment technology, and specifically to a hot melt device for the installation of a prefabricated thermal insulation compensation structure for a pipeline. The device includes a left module and a right module, which are connected by a retractable crossbeam. Each module has a built-in self-centering mechanism to adapt to pipelines of different lengths and diameters. Automatic centering is achieved by rotating the inner turntable to ensure stable installation. The outer turntable drives the crossbeam to rotate around the pipeline, and the hot melt module (equipped with a heating roller) and the discharge module (including a hot melt edge band with a protrusion) on the radial adjustment column perform a circular motion accordingly, uniformly hot-melting the pipeline to form a high-strength sealed connection. The present invention solves the problem of difficult connection and insufficient sealing between the PE corrugated compensation structure and the outer protective PE tube of the thermal insulation layer, and achieves effective sealing even under a larger matching gap.

Description

Technical Field

[0001] The invention relates to the technical field of plastic material forming connection and hot-melt equipment, and in particular to a hot-melt device for installing a prefabricated thermal insulation compensation structure of a pipeline. Background Art

[0002] The information disclosed in the background of the invention is only intended to enhance the understanding of the overall background of the invention and should not be necessarily regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art.

[0003] Since the pipeline will expand and contract during hot operation, the insulation layer will move with the heat of the pipeline, and the insulation layer has no compensation device, which often causes the outer PE tube of the insulation layer to break, losing the insulation and protection effect. In order to solve this technical problem, a compensation structure is added in the prior art to absorb the expansion of the pipeline, and a PE corrugated compensation structure is also added to the insulation layer, and its expansion will also be absorbed by the PE corrugated compensation structure, thereby avoiding the insulation layer and the PE outer protective tube from breaking.

[0004] However, in the prior art, the PE corrugated compensation structure and the outer protective PE tube of the insulation layer are generally directly connected, or connected by adding fixings (such as bolts) at the connection between the two. Due to the consideration of sealing, the matching gap is extremely small, which makes installation extremely difficult. Moreover, even if the matching gap is small enough, its sealing performance still cannot meet the requirements and cannot effectively protect the insulation material.

[0005] Since both the PE corrugated compensation structure and the PE tube protecting the outer layer of the insulation layer are made of plastic materials, the basic conditions are created for connection by hot melt forming. Hot melt forming connection can perfectly solve the above technical problems. Even if the matching gap between the PE corrugated compensation structure and the PE tube protecting the outer layer of the insulation layer is large, effective sealing connection can be achieved by hot melt.

[0006] However, although there are many hot melt forming equipment in the prior art, most of them are linear hot melt forming for smaller workpieces, and there is no technical solution for hot melt forming connection of large cylindrical structures. Therefore, it is necessary to specifically study a hot melt device for the installation of prefabricated insulation compensation structures for pipelines. Summary of the invention

[0007] In view of the problems existing in the prior art, the purpose of the present invention is to provide a hot melt device for the installation of a prefabricated thermal insulation compensation structure of a pipeline, aiming to solve the problems of difficulty in connecting the PE corrugated compensation structure with the outer protective PE tube of the thermal insulation layer and insufficient sealing in the prior art. The device is specially designed for hot melt forming connection of large cylindrical structures, ensuring effective sealing connection even with a large matching gap.

[0008] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0009] A hot melt device for installing a prefabricated thermal insulation compensation structure of a pipeline, comprising a left module and a right module, wherein the left module and the right module are connected by a retractable crossbeam and are symmetrically arranged about the crossbeam axis;

[0010] The left mold assembly and the right mold assembly each include a disc-shaped body with a notch;

[0011] The disc-shaped main body comprises a base plate and an end cover plate, a rotatable inner turntable is concentrically mounted between the base plate and the end cover plate, and more than three centering rods are slidably mounted on the base plate in a radial direction to cooperate with the concentric positioning of the pipeline;

[0012] The centering rod is provided with a driving wheel, and the inner rotating disk is provided with a plurality of pushers corresponding to the driving wheel. The pushers push the corresponding driving wheels as the inner rotating disk rotates, so that the driving wheels drive the corresponding centering rods to move in the direction pointing to the center of the inner rotating disk; the centering rods are provided with corresponding return springs for moving the centering rods away from the center of the circle; thus, the adaptive self-centering installation of the left module and the right module is realized through the rotation of the inner rotating disk;

[0013] A rotatable outer turntable is installed on the outer side of the end cover plate, and both ends of the crossbeam are fixedly installed on the outer turntable;

[0014] The cross beam is provided with a radial adjustment column which can be slidably adjusted along the radial direction of the outer turntable, and the radial adjustment column is provided with a slidably adjustable hot melt module and a material discharge module; the hot melt module and the material discharge module move in a circle around the pipe as the outer turntable rotates;

[0015] The hot melt module includes a heating roller; the unloading module includes an unloading wheel, the unloading wheel is used to wind the hot melt edge band, and a plurality of protrusions are arranged on a side of the hot melt edge band close to the thermal insulation compensation structure;

[0016] After the heating roller heats the connecting member to a hot-melt state, the hot-melt edge band is hot-pressed to the hot-melt portion of the connecting member. The protrusion is used to form a longitudinally staggered connecting portion at the hot-melt portion of the connecting member to improve the strength and density of the hot-melt forming connection.

[0017] The inner turntable and the outer turntable are both provided with corresponding driving teeth, and the disc-shaped body is equipped with a first driving device and a second driving device for driving the inner turntable and the outer turntable to rotate respectively.

[0018] Preferably, the base plate includes an inner ring and a guard plate, and the inner ring is provided with a rotation space for cooperating with the rotation of the pusher claw and a first sliding groove for cooperating with the sliding of the centering rod;

[0019] The mating surface between the pusher claw and the driving wheel is an arc surface.

[0020] Preferably, the hot-melt edge band comprises a strip-shaped bag body made of plastic material, in which a layer of plastic balls forming bulges is arranged, and the bulges are formed by evacuating the bag body.

[0021] Preferably, a hoop plate is provided at the end of the centering rod; and the driving wheel is a roller freely rotatably mounted on the centering rod.

[0022] Preferably, the inner turntable and the outer turntable are both provided with corresponding sliding blocks, and the base plate and the end cover plate are respectively provided with second sliding grooves adapted to the corresponding sliding blocks.

[0023] Preferably, the left module and the right module are both provided with a base.

[0024] Preferably, the hot melt module is slidably mounted on the radial adjustment column through a mounting frame, and radial adjustment is achieved through a screw assembly; the heating roller is an electromagnetic heating roller.

[0025] Preferably, a guide adjustment wheel is provided below the discharge wheel, the guide adjustment wheel and the discharge wheel are installed in an installation box, and the guide adjustment wheel is installed below the discharge wheel;

[0026] The installation box is provided with a slot hole for adjusting the distance between the guide adjustment wheel and the discharge wheel, and the installation shaft of the guide adjustment wheel is installed in the slot hole.

[0027] Preferably, more than three cross beams are arranged between the left module and the right module, and are evenly distributed and connected to the outer turntable; each cross beam is installed with a corresponding hot melt module and a discharge module to provide more than three centripetal hot melt forces for combined hot melt.

[0028] Preferably, the first driving device and the second driving device are both stepping motors;

[0029] The left module and the right module each include more than two evenly distributed first driving devices and second driving devices for relay driving to overcome the influence of the notch on driving continuity.

[0030] The present invention has at least the following beneficial effects:

[0031] The present invention realizes a surrounding hot-melt forming connection for a tubular structure, and is particularly suitable for connecting components of plastic materials of a large cylindrical structure. It can perform continuous and uninterrupted hot-melt processing, avoiding possible weak links at the joints, thereby improving the reliability and durability of the overall connection.

[0032] The present invention realizes connection by forming a hot-melt connection belt from the connection part of the plastic material by hot-melt molding. Among them, the protrusions arranged on the hot-melt edge band can form a longitudinally staggered connection part on the hot-melt part of the connection component, thereby increasing the density and strength of the connection part and making the connection more stable and reliable. In this way, even in the case of a large matching gap, an effective sealing connection can be ensured, solving the problems of unreliable connection and insufficient sealing of direct sleeve connection or connection using fixing parts in the prior art.

[0033] The device is designed with a retractable crossbeam and a self-centering mechanism, which can adapt to pipes of different diameters and can automatically adjust to achieve optimal positioning and installation, thereby increasing the application range and flexibility of the equipment. The self-centering mechanism adopts a coordinated design of an inner turntable, a driving wheel, and a pusher claw, which greatly simplifies the difficulty of the centering process and the installation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0035] Figure 2 This is a schematic diagram of the internal structure of the module;

[0036] Figure 3 It is a schematic diagram of the layout and installation of multiple beams;

[0037] Figure 4 It is a schematic diagram of the internal structure of the discharge module;

[0038] Figure 5 It is a schematic diagram of the structure of the hot-melt edge banding;

[0039] Figure 6 Schematic diagram of the hot melt connecting tape.

[0040] The reference numerals are as follows:

[0041] 100, left module; 200, right module; 201, base plate; 2011, inner ring; 2012, guard plate; 202, end cover plate; 203, outer turntable; 204, inner turntable; 205, hoop plate; 206, centering rod; 207, driving tooth; 208, slider; 209, pusher claw; 210, rotating space; 211, driving wheel; 212, first slide groove; 213, return spring; 300, crossbeam; 301, radial adjustment column; 302, third slide groove; 303, Lead screw; 400, hot melt module; 401, electromagnetic heating roller; 500, discharge module; 501, guide adjustment wheel; 502, installation box; 503, discharge wheel; 504, hot melt edge banding; 5041, bag body; 5042, plastic ball; 5043, protrusion; 505, slot; 600, first drive device; 700, second drive device; 800, base; 900, hot melt connecting belt; 901, pipeline; 902, PE corrugated tube; 903, PE outer casing. DETAILED DESCRIPTION

[0042] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings.

[0043] Figures 1 to 6 A hot-melt device for installing a prefabricated thermal insulation compensation structure for a pipeline is shown. The prefabricated thermal insulation compensation structure in this embodiment is a PE corrugated tube 902, and the insulation layer is provided with a prefabricated PE outer casing 903. The PE corrugated tube 902 is connected to the PE outer casing 903 at both ends by hot-melting to form a hot-melt connecting belt 900.

[0044] The hot melt device includes a left module 100 and a right module 200, which are arranged on both sides of a plastic material connecting member (PE corrugated tube 902 and PE outer casing 903). In this application, they are arranged and installed on a pipe 901 or a PE outer casing 903 to achieve centering and installation. The left module 100 and the right module 200 are connected by a retractable crossbeam 300 and are symmetrically arranged about the crossbeam 300. The crossbeam 300 is retracted to adjust the axial distance.

[0045] The left module 100 and the right module 200 both include a disc-shaped body with a notch;

[0046] The disc-shaped body includes a base plate 201 and an end cover plate 202, a rotatable inner turntable 204 is concentrically mounted between the base plate 201 and the end cover plate 202, and more than three centering rods 206 are slidably mounted on the base plate 201 in a radial direction to cooperate with the concentric positioning of the pipeline 901;

[0047] The centering rod 206 is provided with a driving wheel 211, and the inner rotating disk 204 is provided with a plurality of pushers 209 corresponding to the driving wheel 211. The pushers 209 push the corresponding driving wheel 211 as the inner rotating disk 204 rotates, so that the driving wheel 211 drives the corresponding centering rod 206 to move in the direction pointing to the center of the inner rotating disk 204; the centering rod 206 is provided with a corresponding return spring 213, which is used to make the centering rod 206 move in the direction away from the center of the circle; thus, the left module 100 and the right module 200 can be adaptively self-centeringly installed through the rotation of the inner rotating disk 204, so that they can be installed on pipes 901 with different diameters;

[0048] A rotatable outer turntable 203 is installed on the outer side of the end cover plate 202, and both ends of the cross beam 300 are fixed on the outer turntable 203. The cross beam 300 is driven to rotate around the pipe 901 by the rotation of the outer turntable 203.

[0049] The cross beam 300 is provided with a radial adjustment column 301 that can slide and adjust along the radial direction of the outer turntable 203, and the radial adjustment column 301 is provided with a third slide groove 302, through which the hot melt module 400 and the discharge module 500 that can slide and adjust are installed; the hot melt module 400 and the discharge module 500 make a circular motion around the pipe 901 as the outer turntable 203 rotates;

[0050] The hot melt module 400 includes a heating roller, which may be an electric heating roller, specifically an electromagnetic heating roller 401; the unloading module 500 includes an unloading wheel 503, which is used to wind a hot melt edge band 504, and a side of the hot melt edge band 504 close to the thermal insulation compensation structure is provided with a plurality of protrusions 5043;

[0051] After the heating roller heats the connection member to a hot-melt state, the hot-melt edge band 504 is hot-pressed to the hot-melt portion of the connection member. The protrusion 5043 is used to form a longitudinal staggered connection portion at the hot-melt portion of the connection member to improve the strength and density of the hot-melt forming connection, thereby providing reliable sealing. The radial adjustment column 301 is provided to adjust the radial distance, thereby facilitating the installation of the hot-melt edge band 504.

[0052] The inner turntable 204 and the outer turntable 203 are both provided with corresponding driving teeth 207. The disc-shaped body is installed with a first driving device 600 and a second driving device 700 for driving the inner turntable 204 and the outer turntable 203 to rotate respectively. The first driving device 600 and the second driving device 700 are both stepping motors or servo motors with self-locking function and high precision.

[0053] At the same time, the left module 100 and the right module 200 each include more than two evenly distributed first driving devices 600 and second driving devices 700 for relay driving to overcome the influence of the notch on driving continuity.

[0054] The specific structure of the base plate 201 may be as follows: it includes an inner ring 2011 and a guard plate 2012. The inner ring 2011 is provided to provide a living space for the inner turntable 204. At the same time, the base plate 201 may include an inner ring 2011 and a guard plate 2012. The inner ring 2011 is also provided with a first slide groove 212 for cooperating with the sliding of the centering rod 206.

[0055] In order to better drive the driving wheel 211, the mating surface of the pusher 209 and the driving wheel 211 is set to a streamlined surface or a curved surface. The driving wheel 211 in the present application is a passive wheel that can rotate freely. The driving wheel 211 is moved by the pusher 209, thereby driving the centering rod 206 to slide linearly along the first slide groove 212.

[0056] The structure of the hot-melt edge banding 504 is as follows: it includes a strip-shaped bag body 5041 of plastic material, in which a layer of plastic balls 5042 forming protrusions 5043 is arranged. The protrusions 5043 are formed by vacuuming the bag body 5041. The purpose of the bag body 5041 is to provide a base for the arrangement and connection of the plastic balls 5042.

[0057] In order to make the installation of the device more stable, a hoop plate 205 is provided at the end of the centering rod 206 so as to cooperate with the pipe 901 with a hugging force, thereby stably completing the centering installation of the device.

[0058] In order to realize the sliding installation of the inner turntable 204 and the outer turntable 203 , both of them are provided with corresponding sliding blocks 208 , and the base plate 201 and the end cover plate 202 are respectively provided with second sliding grooves adapted to the corresponding sliding blocks 208 .

[0059] In order to facilitate the placement of the entire device, the left module 100 and the right module 200 are both provided with a base 800 .

[0060] The specific structure of the sliding adjustment installation of the hot melt module 400 can be as follows: it is slidably installed on the radial adjustment column 301 through an installation frame, and radial adjustment is achieved through a screw 303 assembly.

[0061] A guide adjustment wheel 501 is provided below the unloading wheel 503. The guide adjustment wheel 501 and the unloading wheel 503 are installed in the installation box 502. The guide adjustment wheel 501 is installed below the unloading wheel 503. The hot melt edge banding 504 is guided by adjusting the guide adjustment wheel 501. The specific method is as follows: a slot hole 505 for adjusting the distance between the guide adjustment wheel 501 and the unloading wheel 503 is provided on the installation box 502, and the installation shaft of the guide adjustment wheel 501 is installed in the slot hole 505.

[0062] In another embodiment, three or more beams 300 are arranged between the left module 100 and the right module 200, and are evenly distributed and connected to the outer turntable 203; each beam 300 is installed with a corresponding hot melt module 400 and a discharge module 500 to provide more than three centripetal hot melt forces for combined hot melting, which improves the efficiency of hot melt forming connection and can also improve the timeliness and uniformity of hot melting, thereby improving the quality of hot melt forming connection.

[0063] In summary, the device includes a left module 100 and a right module 200, which are connected by a retractable crossbeam 300. Each module has a built-in self-centering mechanism to adapt to pipes 901 of different lengths and diameters. Automatic centering is achieved by rotating the inner turntable 204 to ensure stable installation. The outer turntable 203 drives the crossbeam 300 to rotate around the pipe 901, and the hot melt module 400 (equipped with a heating roller) and the discharge module 500 (including a hot melt edge band 504 with a protrusion 5043) on the radial adjustment column 301 perform a circular motion accordingly, uniformly hot-melt the pipe 901, and form a high-strength sealed connection. The present invention solves the problem of difficult connection and insufficient sealing between the PE corrugated compensation structure and the outer protective PE tube of the insulation layer, and realizes effective sealing even under a larger matching gap.

[0064] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0065] The terms "upper", "lower", "outer side", "inner side", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish the relative relationship in position if they exist, and do not need to be qualitative. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0066] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hot melt device for installing a prefabricated thermal insulation compensation structure for a pipeline, characterized in that: It comprises a left module and a right module, wherein the left module and the right module are connected by a retractable crossbeam and are symmetrically arranged about the crossbeam axis; The left mold assembly and the right mold assembly each include a disc-shaped body with a notch; The disc-shaped main body comprises a base plate and an end cover plate, a rotatable inner turntable is concentrically mounted between the base plate and the end cover plate, and more than three centering rods are slidably mounted on the base plate in a radial direction to cooperate with the concentric positioning of the pipeline; The centering rod is provided with a driving wheel, and the inner rotating disk is provided with a plurality of pushers corresponding to the driving wheel. The pushers push the corresponding driving wheels as the inner rotating disk rotates, so that the driving wheels drive the corresponding centering rods to move in the direction pointing to the center of the inner rotating disk; the centering rods are provided with corresponding return springs for moving the centering rods away from the center of the circle; thus, the adaptive self-centering installation of the left module and the right module is realized through the rotation of the inner rotating disk; A rotatable outer turntable is installed on the outer side of the end cover plate, and both ends of the crossbeam are fixedly installed on the outer turntable; The crossbeam is provided with a radial adjustment column which can be slidably adjusted along the radial direction of the outer turntable, and the radial adjustment column is provided with a slidably adjustable hot melt module and a material discharge module; the hot melt module and the material discharge module move in a circle around the pipe as the outer turntable rotates; The hot melt module includes a heating roller; the unloading module includes an unloading wheel, the unloading wheel is used to wind the hot melt edge band, and a plurality of protrusions are arranged on a side of the hot melt edge band close to the thermal insulation compensation structure; After the heating roller heats the connecting member to a hot-melt state, the hot-melt edge band is hot-pressed to the hot-melt portion of the connecting member. The protrusion is used to form a longitudinally staggered connecting portion at the hot-melt portion of the connecting member to improve the strength and density of the hot-melt forming connection. The inner turntable and the outer turntable are both provided with corresponding driving teeth, and the disc-shaped body is equipped with a first driving device and a second driving device for driving the inner turntable and the outer turntable to rotate respectively.

2. The hot melt device for installing a prefabricated thermal insulation compensation structure for a pipeline as claimed in claim 1, characterized in that: The base plate includes an inner ring and a guard plate, and the inner ring is provided with a rotation space for cooperating with the rotation of the pusher claw and a first sliding groove for cooperating with the sliding of the centering rod; The mating surface between the pusher claw and the driving wheel is an arc surface.

3. The hot melt device for installing a prefabricated thermal insulation compensation structure for a pipeline as claimed in claim 1, characterized in that: The hot-melt edge band comprises a strip-shaped bag body made of plastic material, in which a layer of plastic balls forming bulges is arranged, and the bulges are formed by evacuating the bag body.

4. The hot melt device for installing a prefabricated thermal insulation compensation structure for a pipeline as claimed in claim 1, characterized in that: The end of the centering rod is provided with a hoop plate; the driving wheel is a roller which is freely rotatably mounted on the centering rod.

5. The hot melt device for installing a prefabricated thermal insulation compensation structure for a pipeline as claimed in claim 1, characterized in that: The inner turntable and the outer turntable are both provided with corresponding sliding blocks, and the base plate and the end cover plate are respectively provided with second sliding grooves adapted to the corresponding sliding blocks.

6. The hot melt device for installing a prefabricated thermal insulation compensation structure for a pipeline as claimed in claim 1, characterized in that: The left module and the right module are both provided with a base.

7. The hot melt device for installing a prefabricated thermal insulation compensation structure for a pipeline as claimed in claim 1, characterized in that: The hot melt module is slidably mounted on the radial adjustment column through a mounting frame, and radial adjustment is achieved through a lead screw assembly; the heating roller is an electromagnetic heating roller.

8. The hot melt device for installing a prefabricated thermal insulation compensation structure for a pipeline as claimed in claim 1, characterized in that: A guide adjustment wheel is provided below the unloading wheel, the guide adjustment wheel and the unloading wheel are installed in an installation box, and the guide adjustment wheel is installed below the unloading wheel; The installation box is provided with a slot hole for adjusting the distance between the guide adjustment wheel and the discharge wheel, and the installation shaft of the guide adjustment wheel is installed in the slot hole.

9. The hot melt device for installing a prefabricated thermal insulation compensation structure for a pipeline as claimed in claim 1, characterized in that: More than three cross beams are arranged between the left module and the right module and are evenly distributed and connected to the outer turntable; each cross beam is installed with a corresponding hot melt module and a material discharge module to provide more than three centripetal hot melt forces for combined hot melt.

10. The hot melt device for installing a prefabricated thermal insulation compensation structure for a pipeline as claimed in any one of claims 1 to 9, characterized in that: The first driving device and the second driving device are both stepping motors; The left module and the right module each include more than two evenly distributed first driving devices and second driving devices for relay driving to overcome the influence of the notch on driving continuity.

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