An interface positioning and testing device for the production of prefabricated direct-buried insulated pipes

Abstract

This utility model discloses an interface positioning and detection device for the production of prefabricated direct-buried insulated pipes, relating to the field of prefabricated direct-buried insulated pipe technology. It includes an outer insulated pipe and an inner pipe mounted on the outer insulated pipe via a sponge pad at its axis. It also includes a positioning component disposed at the outer ports of the outer and inner pipes. The positioning component includes a positioning outer disc, the inner annular portion of which is disposed inside the outer and inner pipes, while the outer convex ring of which engages with the outer side of the outer and inner pipes, with its inner wall fitting seamlessly with the outer wall of the inner pipe. The front side wall of the positioning outer disc is slidably fitted with an inner disc. This utility model utilizes the linkage design of the trapezoidal inner disc and the circumferential array of limiting rods. Pressing the inner disc allows the inclined surface to synchronously squeeze and evenly extend the limiting rods, forcing the inner and outer pipes to quickly achieve concentric alignment, resulting in high positioning accuracy.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated direct-buried insulated pipe technology, and in particular to an interface positioning and detection device for the production of prefabricated direct-buried insulated pipes. Background Technology

[0002] Pre-insulated direct-buried pipes are composite pipes consisting of an inner pipe for transporting the medium, an insulation layer, and an outer pipe for corrosion and moisture resistance. They are widely used in municipal centralized heating, water supply, gas transmission, and long-distance medium transportation projects in industries such as chemical and power. Their core advantages lie in high-efficiency insulation, corrosion resistance, and durability, which can significantly reduce energy consumption and operation and maintenance costs. The performance and service life of this pipe directly depend on the concentricity of the inner and outer pipes and the sealing of the joints. If the concentricity deviation is too large, it will lead to uneven thickness of the insulation layer, and local areas are prone to accelerated aging due to concentrated thermal stress, and even insulation layer detachment. Poor joint sealing will cause water vapor to seep in, resulting in corrosion of the inner pipe, moisture in the insulation layer failure, and in severe cases, pipe leakage accidents.

[0003] When aligning the internal parts of insulation pipes, plaster trays are commonly used to center and seal the interfaces between the outer and inner insulation pipes. This process involves repeatedly striking the plaster tray with a hammer to adjust its position and compact the sealing surface. While this method is cost-effective, it suffers from several problems: the concentrated impact and uneven stress generated by the hammering act directly on the pipe body, easily causing plastic deformation of the inner and outer pipes, damage to the interface edges, and compromising the structural integrity of the pipe; the plaster tray itself is rigid and has low positioning accuracy, making it difficult to accurately ensure concentricity of the inner and outer pipes, further exacerbating the uneven filling of the insulation layer; and after the colloid cures, the plaster tray adheres tightly to the colloid and the pipe body, requiring forceful removal during disassembly. This is not only cumbersome and inefficient but also causes secondary damage to the pipe interfaces, wastes plaster material, significantly increases production costs, and fails to meet the demands of large-scale, high-quality production.

[0004] Based on the above viewpoints, those skilled in the art have proposed an interface positioning and detection device for the production of prefabricated direct-buried insulated pipes. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing an interface positioning and detection device for the production of prefabricated direct-buried insulated pipes. This interface positioning and detection device for the production of prefabricated direct-buried insulated pipes utilizes a linkage design between a trapezoidal inner disc and a circumferential array of limiting rods. Pressing the inner disc allows the inclined surface to synchronously squeeze and evenly extend the limiting rods, forcing the inner and outer pipes to quickly achieve concentric alignment, resulting in high positioning accuracy.

[0006] To achieve the above objectives, the present invention provides the following technical solution: An interface positioning and testing device for the production of prefabricated direct-buried insulated pipes includes an outer insulated pipe and an inner pipe mounted on the outer insulated pipe via a sponge pad at the axis, and further includes: A positioning component is disposed at the outer port of the outer and inner insulated tubes. The positioning component includes a positioning outer disk. The inner annular portion of the positioning outer disk is disposed inside the outer and inner insulated tubes, while the outer convex ring of the positioning outer disk is engaged with the outer side of the outer and inner insulated tubes, and the inner wall of this portion is in a gap-free fit with the outer wall of the inner tube. The outer positioning disk has an inner disk that slides on its front side wall. The cross-section of the inner disk, located on the inner side of the outer positioning disk, is trapezoidal. Several limiting rods arranged in a circular array are slidably fitted on the inner and outer sides of the annular portion inside the outer positioning disk. The limiting rods on the inner and outer sides respectively fit against the inner and outer walls of the inner disk.

[0007] Preferably, a pull plate is slidably fitted on the outer side wall of the inner disc, and a connecting rope is connected between several limiting rods on the inner side wall of the pull plate, wherein a pulley structure for guiding the connecting rope is installed on the inner wall of the inner disc.

[0008] Preferably, the pulley structure includes a connecting rod fixed to the inner wall of the inner disc and a guide pulley fixed to the other end of the connecting rod, wherein the middle part of the connecting rope is wound around the guide pulley.

[0009] Preferably, the inner and outer walls of the inner disc are provided with grooves for the sliding of the connecting rope.

[0010] Preferred: The outer wall of the pull plate protrudes from the inner plate.

[0011] Preferably, the outer side wall of the inner disc is provided with a tumbler.

[0012] This utility model has the following beneficial effects: In this invention, the trapezoidal inner disc and the circumferential array of limiting rods are linked. Pressing the inner disc allows the inclined surface to synchronously squeeze the limiting rods, causing them to extend evenly and forcing the inner and outer tubes to quickly achieve concentric alignment with high positioning accuracy. The alignment process is a flexible extrusion, avoiding scratches or deformation to the tube body caused by rigid contact, while ensuring uniform gaps between the inner and outer tubes, providing a stable foundation for colloid filling. Its operation is simple and efficient, requiring no complex adjustments, effectively ensuring the structural stability and insulation effect at the insulation pipe interface, and improving product qualification rate.

[0013] In this invention, the linkage disassembly structure of the pull plate, connecting rope and guide pulley allows for quick retraction of all limit rods after the colloid has cured by pulling the pull plate, completely solving the disassembly problem caused by colloid adhesion and significantly shortening the operation time. The design of the pull plate protruding from the inner plate and the inner plate having a pry bar reduces the difficulty of operation and the intensity of manual labor. The disassembly process does not require violent operation, which protects the service life of the device and avoids damage to the pipe interface, significantly improving production efficiency and reducing production costs. Attached Figure Description

[0014] Figure 1 This is an overall diagram of an interface positioning and detection device for the production of prefabricated direct-buried insulated pipes proposed in this utility model; Figure 2 This is a schematic diagram of a positioning component in an interface positioning and detection device for the production of prefabricated direct-buried insulated pipes proposed in this utility model. Figure 3 This is a schematic diagram of the inner disk and its structure in an interface positioning and detection device for the production of prefabricated direct-buried insulated pipes proposed in this utility model. Figure 4 This is a partial sectional view of the inner disc of an interface positioning and detection device for the production of prefabricated direct-buried insulated pipes proposed in this utility model.

[0015] Legend: 1. Insulated outer pipe; 2. Inner pipe; 3. Positioning assembly; 31. Positioning outer plate; 32. Pull plate; 33. Inner plate; 34. Limiting rod; 35. Slide groove; 36. Connecting rod; 37. Guide pulley; 38. Rocker; 39. Connecting rope. Detailed Implementation

[0016] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example: Refer to Figures 1-4This utility model provides an embodiment of an interface positioning and detection device for the production of prefabricated direct-buried insulated pipes, including an outer insulated pipe 1 and an inner pipe 2 mounted on the outer insulated pipe 1 via a sponge pad at the axial center. It also includes a positioning component 3, which is disposed at the outer ports of the outer insulated pipe 1 and the inner pipe 2. The positioning component 3 includes a positioning outer disk 31, the inner annular portion of which is disposed inside the outer insulated pipe 1 and the inner pipe 2, and the outer convex ring of the positioning outer disk 31 engaging with the outer side of the outer insulated pipe 1 and the inner pipe 2, with the inner wall of this portion fitting without gap to the outer wall of the inner pipe 2. The front side wall of the positioning outer disk 31 is slidably fitted with an inner disk 33, the cross-section of which is trapezoidal in the inner portion of the positioning outer disk 31. Several limiting rods 34 arranged in a circumferential array are slidably fitted on both the inner and outer sides of the inner annular portion of the positioning outer disk 31, and the limiting rods 34 on the inner and outer sides respectively abut against the inner and outer walls of the inner disk 33. This positioning and detection component can center the outer insulation tube 1 and the inner tube 2. In use, the positioning outer plate 31 is placed between the outer insulation tube 1 and the inner tube 2, ensuring that the outer opening of the positioning outer plate 31 is engaged with the outside of the inner tube 2. Then, the inner plate 33 is pressed down, causing it to slide inward toward the inner of the positioning outer plate 31. The inclined design of the outer wall of the inner plate 33 further compresses the limiting rods 34, causing several limiting rods 34 to extend outward synchronously. Since the extension length varies according to the inclined surface of the inner plate 33, the extension length of several limiting rods 34 is uniform. This allows the outer insulation tube 1 and the inner tube 2, which were not originally concentric, to be relatively adjusted under the action of the positioning component 3. This method is relatively gentle and does not easily damage the tube body.

[0018] In an optional embodiment: a pull plate 32 is slidably fitted on the outer wall of the inner plate 33, and a connecting rope 39 is connected between several limiting rods 34 on the inner wall of the pull plate 32. A pulley structure for guiding the connecting rope 39 is installed on the inner wall of the inner plate 33. The pulley structure includes a connecting rod 36 fixed to the inner wall of the inner plate 33 and a guide pulley 37 fixed to the other end of the connecting rod 36. The middle part of the connecting rope 39 is wound around the guide pulley 37. When the positioning component 3 needs to be disassembled after the outer insulation tube 1 and the inner tube 2 are filled with colloid, in order to prevent the colloid from fixing the limiting rods 34 inside the outer insulation tube 1 and the inner tube 2 and making it impossible to remove the positioning component 3, the pull plate 32 is pulled, and the connecting rope 39 is used to further pull the limiting rods 34 towards the inside of the positioning outer plate 31, thereby pulling all the limiting rods 34 into the inside of the positioning outer plate 31. The inner and outer walls of the inner plate 33 are provided with grooves 35 for the connecting rope 39 to slide.

[0019] In an optional embodiment, the outer wall portion of the pull plate 32 protrudes from the inner plate 33. This facilitates gripping by the operator. A pry bar 38 is provided on the outer wall of the inner plate 33, allowing the operator to easily remove the positioning component 3 using a pry bar.

[0020] Working principle: This positioning and detection component can center the outer insulation tube 1 and the inner tube 2. During use, the positioning outer plate 31 is placed between the outer insulation tube 1 and the inner tube 2, ensuring that the outer opening of the positioning outer plate 31 engages with the outside of the inner tube 2. Then, the inner plate 33 is pressed firmly, causing it to slide inwards towards the positioning outer plate 31. The inclined design of the outer wall of the inner plate 33 further compresses the limiting rods 34, causing several limiting rods 34 to extend outwards synchronously. Since the extension length varies according to the inclined surface of the inner plate 33, the extension length of the limiting rods 34 is... The degree is uniform, which allows the originally non-concentric outer insulation tube 1 and inner tube 2 to be relatively adjusted under the action of the positioning component 3. This method is relatively gentle and does not easily damage the tube body. When the positioning component 3 needs to be removed after the outer insulation tube 1 and inner tube 2 are filled with colloid, in order to prevent the colloid from fixing the limiting rod 34 inside the outer insulation tube 1 and inner tube 2 and making the positioning component 3 unable to be removed, pull the pull plate 32, and use the connecting rope 39 to further pull the limiting rod 34 towards the inside of the positioning outer plate 31, thereby pulling all the limiting rods 34 into the inside of the positioning outer plate 31.

[0021] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., 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. An interface positioning and detection device for the production of prefabricated direct-buried insulated pipes, comprising an outer insulated pipe (1) and an inner pipe (2) mounted on the axis of the outer insulated pipe (1) via a sponge pad, characterized in that: Also includes: Positioning component (3) is provided at the outer port of the heat-insulating outer tube (1) and the inner tube (2). The positioning component (3) includes a positioning outer disk (31). The inner annular part of the positioning outer disk (31) is provided inside the heat-insulating outer tube (1) and the inner tube (2), while the outer convex ring of the positioning outer disk (31) is engaged with the outside of the heat-insulating outer tube (1) and the inner tube (2), and the inner wall of this part is in close fit with the outer wall of the inner tube (2) without gap. The outer positioning disk (31) has an inner disk (33) that slides on its front side wall. The inner disk (33) is located on the inner side of the outer positioning disk (31) and has a trapezoidal cross section. The inner and outer sides of the inner annular part of the outer positioning disk (31) are fitted with several limiting rods (34) arranged in a circular array. The limiting rods (34) on the inner and outer sides are respectively attached to the inner and outer walls of the inner disk (33).

2. The interface positioning and detection device for the production of prefabricated direct-buried insulated pipes according to claim 1, characterized in that: The outer wall of the inner disc (33) is slidably fitted with a pull plate (32), and a connecting rope (39) is connected between several limiting rods (34) on the inner wall of the pull plate (32). A pulley structure for guiding the connecting rope (39) is installed on the inner wall of the inner disc (33).

3. The interface positioning and detection device for the production of prefabricated direct-buried insulated pipes according to claim 2, characterized in that: The pulley structure includes a connecting rod (36) fixed to the inner wall of the inner plate (33) and a guide pulley (37) fixed to the other end of the connecting rod (36), wherein the middle part of the connecting rope (39) is wound on the guide pulley (37).

4. The interface positioning and detection device for the production of prefabricated direct-buried insulated pipes according to claim 1, characterized in that: The inner and outer walls of the inner disc (33) are provided with grooves (35) for the connecting rope (39) to slide.

5. The interface positioning and detection device for the production of prefabricated direct-buried insulated pipes according to claim 1, characterized in that: The outer wall of the pull plate (32) protrudes from the inner plate (33).

6. The interface positioning and detection device for the production of prefabricated direct-buried insulated pipes according to claim 1, characterized in that: A flap (38) is provided on the outer wall of the inner disc (33).

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