Infrared curing device for trenchless pipeline repair

Abstract

The invention relates to the technical field of pipeline repair, in particular to a trenchless infrared curing device for pipeline repair, which comprises a traveling mechanism, the traveling mechanism comprises two mounting parts which are symmetrically distributed at intervals, a plurality of traveling rods are hinged to the opposite surfaces of the two mounting parts, and traveling wheels are rotatably arranged at the tail ends of the traveling rods. A storage control assembly used for controlling the walking rod to rotate around the hinge part of the walking rod is further arranged on the mounting part. The opposite faces of the two installation parts are each provided with a holding box, and the opposite faces of the two holding boxes are each provided with a plurality of infrared irradiation assemblies. The infrared irradiation assembly can slide in the radial direction of the maintaining box so as to adapt to pipelines with different pipe diameters, it is guaranteed that the proper distance between the lamp tube and the inner wall of the pipeline can be kept in the pipelines with the different pipe diameters, and the optimal curing effect is achieved.

Description

Technical Field

[0001] This invention relates to the field of pipeline repair technology, specifically to an infrared curing device for trenchless pipeline repair. Background Technology

[0002] Currently, in the field of municipal pipeline networks, pipelines are prone to corrosion, leakage, and damage due to long-term use. Trenchless pipeline repair technology, with its advantages of not requiring large-scale road excavation and high construction efficiency, has become the mainstream method for pipeline repair. Among them, infrared curing devices, as a common core equipment in the field of trenchless pipeline repair, play a key role in the pipeline lining repair process.

[0003] Specifically, the trenchless pipeline repair process is as follows: First, the inside of the pipeline to be repaired is cleaned and inspected to remove debris, rust, and other contaminants from the inner wall, ensuring a smooth inner wall to guarantee the subsequent repair effect. Second, a pre-fabricated resin-lined hose is pulled into the pipeline to be repaired, and the hose is inflated to ensure a tight fit with the inner wall of the pipeline. Finally, an infrared curing device is inserted into the pipeline and slowly reciprocated inside, allowing the resin in the hose to quickly cure under infrared radiation, forming a repair layer that is tightly bonded to the original pipeline, thus achieving pipeline repair.

[0004] However, existing infrared curing devices still have shortcomings in practical applications. For example, when curing the inner wall of a pipe, the distance between the lamp and the inner wall should ideally be 5-10 cm. However, due to the varying inner diameters of pipes to be repaired in different scenarios, the lamp spacing in many existing infrared curing devices is fixed and cannot be adjusted, or is inconvenient to adjust, making it difficult to flexibly adapt to the repair needs of pipes with different inner diameters. This leads to problems such as poor curing efficiency, affecting the overall effect and durability of pipe repair. For example, invention patent CN115945368B proposes an infrared curing device for trenchless pipe repair, which includes a fixed plate, rotating rod, lamp holder, infrared lamp, and movable plate. Although this technical solution can deform to change its volume, making it easier for the device to enter the pipe, the distance between the lamp and the inner wall of the pipe cannot be adjusted. Therefore, we propose an infrared curing device for trenchless pipe repair to effectively solve the above-mentioned drawbacks. Summary of the Invention

[0005] The purpose of this invention is to provide an infrared curing device for trenchless pipeline repair, which solves the problems mentioned in the background art.

[0006] The present invention is achieved through the following technical solution: an infrared curing device for trenchless pipeline repair, comprising a walking mechanism, wherein the walking mechanism comprises two symmetrically distributed mounting parts, and a plurality of walking rods are hinged to the opposite sides of the two mounting parts, wherein the end of the walking rod is rotatably provided with a walking wheel, and the mounting part is also provided with a storage control component for controlling the walking rod to rotate around its own hinged part. Each of the two mounting parts has a retaining box on its facing surface. Each of the two retaining boxes has a plurality of infrared irradiation components on its facing surface. The plurality of infrared irradiation components are evenly spaced along the circumference of the retaining box, and the infrared irradiation components are slidably connected to the corresponding retaining box along the radial direction of the retaining box. The infrared irradiation components include infrared irradiation lamps. A shrinking mechanism is also provided between the two mounting parts, the shrinking mechanism passing through the retaining box and used to adjust the distance between the two mounting parts; The holding box is equipped with a lamp distance adjustment component, which is used to control the infrared irradiation component to slide radially along the holding box. When the walking rod is extended outward, the lamp distance adjustment component can control the infrared irradiation component to slide outward radially along the holding box.

[0007] Optionally, the storage control assembly includes a fixing part, which is fixedly connected to a mounting part via multiple guide rods. A displacement part is slidably connected to all of the guide rods. A diagonal brace, corresponding to a travel rod, is hinged to the displacement part, and the other end of each diagonal brace is hinged to a corresponding travel rod. The storage control assembly also includes a drive actuator disposed between the fixing part and the mounting part, which controls the displacement part to slide along the guide rods.

[0008] Optionally, the infrared irradiation assembly includes a sliding block, which is slidably connected to the retaining box along the radial direction of the retaining box. An extension plate is fixedly provided on the sliding block facing away from the center of the retaining box, and an assembly part is provided at the end of the extension plate. The infrared irradiation lamp is mounted on the assembly part. Several sliding openings are provided on the facing surfaces of the two retaining boxes, which are radially distributed. The sliding block is slidably connected to the inside of the sliding opening. The side of the sliding block facing away from the center of the retaining box and the inner wall of the sliding opening are connected by a return spring. In the natural state, the return spring is compressed, and the sliding block is located at the end of the sliding opening near the center of the retaining box.

[0009] Optionally, the lamp distance adjustment assembly includes a movable part located inside the retaining box. One end of the movable part is provided with several sliding posts, each corresponding to a certain number of traveling rods. One end of each sliding post passes through the retaining box and points towards the corresponding traveling rod. An adjusting spring is provided between the movable part and the inner wall of the retaining box. The adjusting spring has a tendency to push the movable part toward the side closer to the mounting part, so that the outer end of the sliding post abuts against the traveling rod. A traction rope is also provided between the sliding block and the movable part. When the traveling rod is extended, the traveling rod can push the movable part away from the mounting part, so as to pull the traction rope to move it toward the side away from the center of the retaining box.

[0010] Optionally, the extension plate has a hinge at its end, and the assembly part is rotatably connected to the extension plate through the hinge. A torsion spring is provided on the hinge shaft of the hinge. In its natural state, the assembly part and the extension plate are perpendicularly distributed. Both ends of the hinge shaft of the hinge are provided with driven pieces. When the distance between the end of the extension plate and the center of the retaining box is less than the radius of the retaining box, the driven pieces abut against the side wall of the retaining box, and the assembly part and the extension plate are in contact.

[0011] Optionally, the retraction mechanism includes two outer sleeves and one inner sleeve. The two outer sleeves are fixedly connected to two mounting parts respectively, and the two ends of the inner sleeve are respectively embedded inside the two outer sleeves. The outer sleeves and the inner sleeve are provided with a telescopic drive component, which is used to control the telescopic movement of the outer sleeves and the inner sleeve.

[0012] Optionally, the telescopic drive component includes electromagnets located at both ends of the inner sleeve and a permanent magnet block located inside the outer sleeve. When the electromagnet is energized, the electromagnet and the permanent magnet block repel each other, and the outer sleeve and the inner sleeve are in an extended state. When the electromagnet is de-energized, the electromagnet and the permanent magnet block attract each other, and the outer sleeve and the inner sleeve are in a retracted state.

[0013] Compared with the prior art, the present invention provides an infrared curing device for trenchless pipeline repair, which has the following advantages: 1. The infrared irradiation component in this invention can slide radially along the holding box to adapt to pipes of different diameters, ensuring that the lamp tube can maintain a suitable distance from the inner wall of the pipe in pipes of different diameters to achieve the best curing effect. 2. When the walking pole in this invention extends outward, it can indirectly drive the infrared irradiation component to move outward under the linkage of the lamp distance adjustment component. Therefore, the movement of the infrared irradiation component does not require additional control and can flexibly adapt to the inner diameter of the pipe and change automatically, making the operation process faster and more convenient. 3. The shrinkage mechanism in this invention can adjust the distance between the two mounting parts, thereby changing the length of the device. Therefore, when the device enters the pipe from the manhole, the length of the device can be shortened, making the operation process more convenient. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the walking mechanism of the present invention; Figure 3 This is a cross-sectional view of the first state structure of the present invention; Figure 4 This is a cross-sectional view of the second state structure of the present invention; Figure 5 This is a partial cross-sectional view of the first state of the present invention; Figure 6 This is a partial cross-sectional view of the second state of the present invention; Figure 7 This is a schematic diagram of the infrared irradiation component structure of the present invention; Figure 8 for Figure 5 Enlarged view of point A in the middle.

[0015] In the diagram: 100, Walking mechanism; 101, Mounting part; 102, Walking rod; 103, Walking wheel; 104, Fixing part; 105, Guide rod; 106, Displacement part; 107, Diagonal brace; 108, Threaded rod; 109, Drive motor; 200, Retaining box; 201, Return spring; 202, Wiring channel; 300, Infrared irradiation assembly; 301, Infrared irradiation lamp; 302, Sliding block; 303, Extension plate; 304, Assembly part; 305, Hinge seat; 306, Driven piece; 400, Lamp distance adjustment assembly; 401, Moving part; 402, Sliding column; 403, Adjusting spring; 404, Traction rope; 500, Retraction mechanism; 501, Outer sleeve; 502, Inner sleeve; 503, Electromagnet; 504, Permanent magnet. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Please see Figure 1 - Figure 8This application proposes an infrared curing device for trenchless pipeline repair, comprising a walking mechanism 100. The walking mechanism 100 includes two symmetrically spaced mounting portions 101. Several walking rods 102 are hinged to the opposite sides of the two mounting portions 101. The ends of the walking rods 102 are rotatably equipped with walking wheels 103. The mounting portions 101 are also equipped with a storage control component for controlling the rotation of the walking rods 102 around their own hinged portions. Specifically, in this embodiment, each mounting portion 101 has three walking rods 102. One end of the walking rod 102 is hinged to the mounting portion 101, and the other end has a walking wheel 103 for adhering to the inner wall of the pipeline. In order to enable the device to move automatically, an electric drive structure can also be provided on one of the walking rods 102 to control the rotation of the walking wheel 103. Of course, if the walking wheel 103 does not have power, the device can also be moved inside the pipeline by manual traction using ropes.

[0018] Specifically, the storage control component includes a fixing part 104, which is fixedly connected to a mounting part 101 via multiple guide rods 105. A displacement part 106 is slidably connected to each of the guide rods 105. A diagonal brace 107, corresponding to a travel rod 102, is hinged to the displacement part 106. The other end of the diagonal brace 107 is hinged to the corresponding travel rod 102. The fixing part 104 and the mounting part 101 are relatively distributed. Both ends of the guide rods 105 are simultaneously connected and fixed to both the mounting part 101 and the fixing part 104. The guide rods 105 are smooth rods, allowing the displacement part 106 to slide freely along the axis of the guide rods 105. When the displacement part 106 approaches the fixing part 104 along the guide rods 105, the travel rod 102 gradually retracts to accommodate small-diameter pipes. Conversely, when the displacement part 106 approaches the mounting part 101 along the guide rods 105, the travel rod 102 gradually extends to accommodate large-diameter pipes.

[0019] like Figure 2As shown, the storage control assembly also includes a drive actuator disposed between the fixed part 104 and the mounting part 101. The drive actuator controls the displacement part 106 to slide along the guide rod 105. The drive actuator includes a threaded rod 108 and a drive motor 109. The two ends of the threaded rod 108 are rotatably connected to the mounting part 101 and the fixed part 104, respectively, while the threaded rod 108 and the displacement part 106 are threadedly connected. The drive motor 109 is fixedly mounted on the mounting part 101 via a motor mount, and the output shaft of the drive motor 109 is driven by the threaded rod 108 via a gear set. When the drive motor 109 is started, the displacement part 106 can be indirectly controlled to move back and forth via the threaded rod 108, thereby controlling the unfolding or retraction of the walking rod 102. In addition, in other embodiments, the drive actuator can also be an electric telescopic rod, with the fixed end and movable end of the electric telescopic rod connected to the mounting part 101 and the displacement part 106, respectively, so that the displacement part 106 can be directly controlled to move closer to or away from the mounting part 101.

[0020] In this embodiment, each of the two mounting portions 101 has a retaining box 200 on its facing surface. Each retaining box 200 has a plurality of infrared irradiation components 300 on its facing surface. The infrared irradiation components 300 are evenly spaced along the circumference of the retaining box 200, and are radially slidably connected to the corresponding retaining box 200. Each infrared irradiation component 300 includes an infrared irradiation lamp 301. Each infrared irradiation component 300 includes a sliding block 302, which is radially slidably connected to the retaining box 200. An extension plate 303 is fixedly mounted on the sliding block 302 towards the side furthest from the center of the retaining box 200. The extension plates 303 are also radially distributed along the retaining box 200, and an assembly portion 304 is provided at the end of the extension plate 303. The infrared irradiation lamps 301 are mounted on the assembly portion 304. Specifically, the retaining box 200 is a cylindrical hollow structure, with one end fixedly connected to the mounting portion 101 by bolts. Infrared lamp 301 is used to emit infrared light to promote the rapid curing of resin in the inner lining hose under radiation.

[0021] As one embodiment and not a limitation, the two retaining boxes 200 have several sliding openings radially distributed along their facing surfaces. A sliding block 302 is slidably connected to the inner side of each sliding opening. The side of the sliding block 302 facing away from the center of the retaining box 200 is connected to the inner wall of the sliding opening via a return spring 201. In its natural state, the return spring 201 is compressed, and the sliding block 302 is located at the end of the sliding opening closest to the center of the retaining box 200. That is, the return spring 201 always exerts a pushing force on the sliding block 302 towards the center of the retaining box 200. The extension plate 303 and the sliding block 302 are also fixed together by bolts. The extension plate 303 is elongated, and its length is shorter than the radius of the retaining box 200.

[0022] In this embodiment, the interior of the holding box 200 is provided with a lamp spacing adjustment component 400. The lamp spacing adjustment component 400 is used to control the infrared irradiation component 300 to slide radially along the holding box 200. When the walking rod 102 is extended outward, the lamp spacing adjustment component 400 can control the infrared irradiation component 300 to slide outward radially along the holding box 200. Specifically, the lamp spacing adjustment assembly 400 includes a movable part 401 located inside the retaining box 200. One end of the movable part 401 is provided with a plurality of sliding posts 402, which correspond one-to-one with a plurality of traveling rods 102. One end of the sliding post 402 passes through the retaining box 200 and points to the corresponding traveling rod 102. An adjusting spring 403 is provided between the movable part 401 and the inner wall of the retaining box 200. The adjusting spring 403 has a tendency to push the movable part 401 toward the side closer to the mounting part 101, so that the outer end of the sliding post 402 abuts against the traveling rod 102. It should be noted that the sliding post 402 and the retaining box 200 are slidably engaged by a linear bearing. Therefore, the movable part 401 can slide along the axial direction of the retaining box 200. When the walking rod 102 gradually unfolds, it can push the movable part 401 away from the mounting part 101. Conversely, when the walking rod 102 gradually closes, the movable part 401 will move back towards the mounting part 101 under the action of the adjusting spring 403. Therefore, the unfolding and closing of the walking rod 102 can directly drive the movable part 401 to slide back and forth.

[0023] It is worth mentioning that when the walking rod 102 is parallel to the central axis of the retaining box 200, the walking rod 102 does not contact the sliding column 402; when the walking rod 102 extends outward and the angle between it and the central axis of the retaining box 200 exceeds 30°, the walking rod 102 begins to abut against the sliding column 402.

[0024] Furthermore, a traction rope 404 is provided between the sliding block 302 and the movable part 401. When the traveling rod 102 is extended, it can push the movable part 401 away from the mounting part 101, thereby pulling the traction rope 404 to move it away from the center of the retaining box 200. A wiring channel 202 is provided in the side wall of the retaining box 200. One end of the traction rope 404 is connected to the sliding block 302, and the other end passes through the wiring channel 202 and is connected to the movable part 401. Specifically, when the movable part 401 moves away from the mounting part 101, the traction rope 404 can be pulled to move the sliding block 302 outward; conversely, when the movable part 401 approaches the mounting part 101, the traction rope 404 can be released, and under the action of the return spring 201, the sliding block 302 can also move inward. Therefore, by extending and retracting the traveling rod 102, the radial sliding of the infrared irradiation assembly 300 along the retaining box 200 can be indirectly controlled.

[0025] In other embodiments of this application, a hinge seat 305 is provided at the end of the extension plate 303. The assembly part 304 is rotatably connected to the extension plate 303 through the hinge seat 305, and a torsion spring is provided on the hinge axis of the hinge seat 305. In its natural state, the assembly part 304 and the extension plate 303 are perpendicularly distributed. The hinge seat 305 only allows the assembly part 304 to rotate within a range of 90°, that is, to rotate between being perpendicular to the extension plate 303 and parallel to the extension plate 303. The function of the torsion spring is to push the assembly part 304 to flip outward. Specifically, when the assembly part 304 is not subjected to external force, the assembly part 304 can always remain perpendicular to the extension plate 303 under the action of the torsion spring.

[0026] As one embodiment and not a limitation, the hinge 305 has driven pieces 306 at both ends of the hinge shaft. When the distance between the end of the extension plate 303 and the center of the retaining box 200 is less than the radius of the retaining box 200, the driven pieces 306 abut against the side wall of the retaining box 200, and the assembly part 304 fits against the extension plate 303. The driven pieces 306 are fixedly connected to the hinge shaft. When the end of the extension plate 303 exceeds the outer wall of the retaining box 200, the driven pieces 306 do not contact the outside, and the assembly part 304 remains perpendicular to the extension plate 303. When the extension plate 303 moves towards the center of the retaining box 200 until the driven pieces 306 abut against the side wall of the retaining box 200, the driven pieces 306 are forced to rotate, thereby driving the assembly part 304 to rotate until the assembly part 304 remains parallel and fitted against the extension plate 303.

[0027] It should be noted that the length of the assembly part 304 is slightly smaller than the radius of the retaining box 200, so that several assembly parts 304 can work together to maintain the folded state. At the same time, when the return spring 201 pushes the sliding block 302 to move inward until the driven piece 306 abuts against the side wall of the retaining box 200, the elastic force of the return spring 201 must be greater than the resistance of the torsion spring so that the driven piece 306 can overcome the torsion of the torsion spring and rotate to maintain the folded state.

[0028] In some embodiments of this application, a shrinkage mechanism 500 is also provided between the two mounting portions 101. The shrinkage mechanism 500 passes through the retaining box 200 and is used to adjust the distance between the two mounting portions 101. The shrinkage mechanism 500 includes two outer sleeves 501 and one inner sleeve 502. The two outer sleeves 501 are fixedly connected to the two mounting portions 101 respectively, and the two ends of the inner sleeve 502 are respectively embedded inside the two outer sleeves 501. The outer sleeves 501 and the inner sleeve 502 are provided with a telescopic drive component, which is used to control the telescopic movement of the outer sleeves 501 and the inner sleeve 502. It should be noted that the outer ends of the inner sleeve 502 and the inner ring wall of the outer sleeve 501 have an anti-detachment structure to prevent the inner sleeve 502 from separating from the outer sleeve 501, and one end of the outer sleeve 501 is fixedly connected to the corresponding mounting portion 101 by bolts.

[0029] Furthermore, the telescopic drive component includes electromagnets 503 located at both ends of the inner sleeve 502, and a permanent magnet block 504 located inside the outer sleeve 501. When the electromagnet 503 is energized, the electromagnet 503 and the permanent magnet block 504 repel each other, and the outer sleeve 501 and the inner sleeve 502 are in an extended state; when the electromagnet 503 is de-energized, the electromagnet 503 and the permanent magnet block 504 attract each other, and the outer sleeve 501 and the inner sleeve 502 are in a retracted state. Since the electromagnet 503 is equivalent to an iron block when it is de-energized, it can be attracted by the permanent magnet block 504; conversely, when it is energized, its opposite magnetic poles are the same as those of the permanent magnet block 504, so they repel each other. Therefore, when the electromagnet 503 is energized, the two mounting parts 101 can be kept at a greater distance, and when the electromagnet 503 is de-energized, the two mounting parts 101 can be kept at a closer distance, so as to facilitate the device to pass through narrow corner positions.

[0030] It is worth noting that pipelines are mostly buried underground, and the manholes at their ends are usually quite narrow. When the infrared curing device enters the pipeline to be repaired through the manhole, the limited operating space makes the placement, adjustment, and insertion of the device very inconvenient, easily leading to collisions between the device and the manhole wall or pipeline end. This not only reduces construction efficiency but may also damage the device components. Therefore, in this embodiment, the retraction mechanism 500 can directly control the retraction of the device, thus facilitating its entry into the pipeline from a smaller space. Once inside the pipeline, the device can then be extended.

[0031] In summary, in practical applications, the device is initially in a retracted position, such as... Figure 4 As shown; after the device enters the pipe, the retraction mechanism 500 controls the device to extend, and then, under the action of the storage control component, the walking rod 102 gradually unfolds, and gradually drives the infrared irradiation component 300 to unfold outward, as shown. Figure 3 As shown. It should be noted that the greater the extension range of the walking rod 102, the larger the inner diameter of the pipe, and the greater the extension range of the infrared irradiation component 300, thus ensuring that the infrared irradiation lamp 301 always maintains a suitable distance from the inner wall of the pipe, guaranteeing the curing effect.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An infrared curing device for trenchless pipe rehabilitation comprising a walking mechanism, characterized in that: The walking mechanism includes two symmetrically spaced mounting parts. Several walking rods are hinged to the opposite sides of the two mounting parts. The ends of the walking rods are rotatably equipped with walking wheels. The mounting parts are also equipped with a storage control component for controlling the rotation of the walking rods around their own hinged parts. Each of the two mounting parts has a retaining box on its facing surface. Each of the two retaining boxes has a plurality of infrared irradiation components on its facing surface. The plurality of infrared irradiation components are evenly spaced along the circumference of the retaining box, and the infrared irradiation components are slidably connected to the corresponding retaining box along the radial direction of the retaining box. The infrared irradiation components include infrared irradiation lamps. A shrinking mechanism is also provided between the two mounting parts, the shrinking mechanism passing through the retaining box and used to adjust the distance between the two mounting parts; The holding box is equipped with a lamp distance adjustment component, which is used to control the infrared irradiation component to slide radially along the holding box. When the walking rod is extended outward, the lamp distance adjustment component can control the infrared irradiation component to slide outward radially along the holding box.

2. A trenchless pipe rehabilitation infrared curing device as defined in claim 1, wherein: The storage control component includes a fixing part, which is fixedly connected to a mounting part via multiple guide rods. A displacement part is slidably connected to the multiple guide rods. A diagonal brace corresponding to a walking rod is hinged to the displacement part, and the other end of the diagonal brace is hinged to the corresponding walking rod.

3. A trenchless pipe rehabilitation infrared curing device as defined in claim 2, wherein: The storage control assembly also includes a drive actuator disposed between the fixing part and the mounting part, the drive actuator being used to control the displacement part to slide along the guide rod.

4. The infrared curing device for trenchless pipeline repair according to claim 1, characterized in that: The infrared irradiation assembly includes a sliding block, which is slidably connected to the retaining box along the radial direction of the retaining box. An extension plate is fixedly provided on the sliding block toward the side away from the center of the retaining box, and an assembly part is provided at the end of the extension plate. The infrared irradiation lamp is mounted on the assembly part.

5. The infrared curing device for trenchless pipeline repair according to claim 4, characterized in that: The two retaining boxes have several sliding openings on their facing surfaces, which are distributed radially along the retaining boxes. The sliding block is slidably connected to the inside of the sliding opening. The side of the sliding block facing away from the center of the retaining box is connected to the inner wall of the sliding opening by a return spring. In its natural state, the return spring is compressed, and the sliding block is located at the end of the sliding opening near the center of the retaining box.

6. The infrared curing device for trenchless pipeline repair according to claim 5, characterized in that: The lamp distance adjustment assembly includes a movable part located inside the retaining box. One end of the movable part is provided with a plurality of sliding posts, and the plurality of sliding posts correspond one-to-one with a plurality of traveling rods. One end of the sliding post passes through the retaining box and points to the corresponding traveling rod. An adjustment spring is provided between the movable part and the inner wall of the retaining box. The adjustment spring has a tendency to push the movable part toward the side closer to the mounting part so that the outer end of the sliding post abuts against the traveling rod. A traction rope is also provided between the sliding block and the movable part. When the walking rod is extended, the walking rod can push the movable part away from the mounting part, so as to pull the traction rope to move it toward the side away from the center of the retaining box.

7. The infrared curing device for trenchless pipeline repair according to claim 4, characterized in that: The extension plate has a hinge seat at its end, and the assembly part is rotatably connected to the extension plate through the hinge seat. A torsion spring is provided on the hinge shaft of the hinge seat. In its natural state, the assembly part and the extension plate are vertically distributed.

8. The infrared curing device for trenchless pipeline repair according to claim 7, characterized in that: Both ends of the hinge shaft of the hinge seat are provided with driven plates. When the distance between the end of the extension plate and the center of the retaining box is less than the radius of the retaining box, the driven plate abuts against the side wall of the retaining box, and the assembly part and the extension plate fit together.

9. The infrared curing device for trenchless pipeline repair according to claim 1, characterized in that: The retraction mechanism includes two outer tubes and one inner tube. The two outer tubes are fixedly connected to two mounting parts respectively, and the two ends of the inner tube are respectively embedded inside the two outer tubes. The outer tubes and the inner tube are provided with a telescopic drive component, which is used to control the telescopic extension and retraction of the outer tubes and the inner tube.

10. The infrared curing device for trenchless pipeline repair according to claim 9, characterized in that: The telescopic drive component includes electromagnets located at both ends of the inner sleeve and a permanent magnet block located inside the outer sleeve. When the electromagnet is energized, the electromagnet and the permanent magnet block repel each other, and the outer sleeve and the inner sleeve are in an extended state. When the electromagnet is de-energized, the electromagnet and the permanent magnet block attract each other, and the outer sleeve and the inner sleeve are in a retracted state.

Images