Automatic folding device adapted to ultraviolet light-cured repair material

Abstract

The utility model relates to a folding plate type automatic folding device suitable for ultraviolet light curing repair material, is equipped with the conveying platform, is equipped with the compression roller mechanism and the folding mechanism on the conveying platform, and the compression roller mechanism is located at the feeding side of conveying platform, is equipped with the transverse pair of rollers, each is equipped with an annular protrusion for pressing the indentation on the two sides of upper roller, each is equipped with a corresponding annular groove on the two sides of lower roller, and the folding mechanism is located in front of the compression roller mechanism, is equipped with left and right two folding plates, and the folding plate is rotatably connected with the conveying platform through the folding plate pivot, and the folding plate drive arrangement drives the corresponding folding plate pivot. The utility model can realize the automatic folding of the inner lining pipe or other objects to be folded, which helps to reduce the labor intensity and improve the operation efficiency.

Description

Technical Field

[0001] This utility model relates to a folding plate type automatic folding device adapted to ultraviolet light curing repair materials. Background Technology

[0002] Ultraviolet curing repair technology is a type of in-situ curing method. It uses a traction method to pull an inner liner tube stacked to a suitable width into the pipe to be repaired. Then, it uses ultraviolet light of a special wavelength to irradiate the pipe, so that the inner liner tube is cured and adheres tightly to the inner wall of the pipe to be repaired, thereby achieving the purpose of pipe repair. However, most commercially available lining pipes are currently stacked flat and placed inside a box, with a width significantly larger than the inner diameter of the pipe to be repaired. This requires manual folding of the lining pipe pulled from the box to a suitable width before it is pulled into the pipe through the starting manhole. This method is labor-intensive, time-consuming, and costly. Furthermore, it only allows for intermittent operation: after folding the lining pipe between the box and the starting manhole guide wheel, a winch is started to pull the folded section into the starting manhole, then the winch is stopped, the remaining lining pipe pulled from the box is folded, and then the winch is started again. This is especially problematic for large-diameter lining pipes, as the manual folding is time-consuming and significantly impacts work efficiency. Finally, it requires a sufficiently large work area between the box and the starting manhole, which increases disturbance to residents, particularly in busy urban areas. Utility Model Content

[0003] The purpose of this invention is to realize the mechanization of on-site folding of inner lining tubes, so as to reduce labor intensity and improve work efficiency.

[0004] The technical solution of this utility model is: an automatic folding device for UV-curable repair materials, comprising a conveying platform, a pressure roller mechanism and a folding mechanism. The pressure roller mechanism is located on the feeding side of the conveying platform and is provided with transverse rollers, which consist of an upper roller and a lower roller. Each side of the upper roller is provided with an annular protrusion for pressing indentations, and each side of the lower roller is provided with an annular groove corresponding to the corresponding annular protrusion. The folding mechanism is located in front of the pressure roller mechanism and is provided with two folding plates, one on the left and one on the right. A longitudinally extending folding plate pivot is provided on one edge of the folding plate, which is rotatably connected to the conveying platform. A folding plate driving device drives the corresponding folding plate pivot.

[0005] Preferably, there are two folding mechanisms, spaced apart front and back; Preferably, when there are multiple folding plate mechanisms, the folding plate in the last folding mechanism adopts a curved surface with a flared rear end; when there is only one folding plate mechanism, its folding plate adopts a curved surface with a flared rear end.

[0006] Furthermore, depending on actual needs, the conveying platform may or may not be equipped with a transition folding mechanism. The transition folding mechanism is located between the pressure roller mechanism and the folding mechanism, and is equipped with two transition folding plates on the left and right. A longitudinally extending transition folding plate pivot is provided on one edge of the transition folding plate, and is rotatably connected to the conveying platform through the transition folding plate pivot. The transition folding plate driving device drives the corresponding transition folding plate pivot.

[0007] Preferably, there are two transition folding mechanisms, spaced apart front and back.

[0008] Preferably, the transition folding plate of the transition folding mechanism adopts a curved surface with a flared rear end. Preferably, the feed end of the conveyor platform is provided with two adjusting guide plates, which are symmetrically arranged on both sides of the feed end of the conveyor platform.

[0009] Preferably, the feed end of the conveying platform is provided with adjusting guide plates. There are two adjusting guide plates, which are symmetrically arranged on both sides of the feed end of the conveying platform. The distance between the discharge ends of the two adjusting guide plates is adapted to the width of the inner liner tube (usually slightly larger than the width of the inner liner tube, so as to limit the inner liner tube located between the two from shifting left and right and not to hinder the movement of the inner liner tube), thereby adjusting or limiting the lateral position of the inner liner tube.

[0010] Preferably, the distance between the feed ends (lateral distance) of the two adjusting guide plates is greater than the distance between the discharge ends.

[0011] Preferably, both adjusting guide plates are vertical curved surfaces that expand outward from the rear end (the intersection with the horizontal plane is a curve or a broken line), and are arranged symmetrically to each other.

[0012] Preferably, the discharge end of the conveying platform may or may not have a guide roller mechanism.

[0013] Preferably, the guide roller mechanism includes a horizontal guide roller and two vertical guide rollers. The horizontal guide roller is located above the conveying platform, and the two vertical guide rollers are located on both sides of the gap between the horizontal guide roller and the conveying platform.

[0014] Preferably, the vertical guide rollers are located on both sides of the gap between the horizontal guide rollers and the conveying platform.

[0015] Preferably, the upper end of the vertical guide roller is not lower than the bottom of the horizontal guide roller, and the lower end of the vertical guide roller is not higher than the conveying surface of the conveying platform.

[0016] Furthermore, the upper and lower rollers are both centered in the transverse direction (the transverse centers of the upper roller, the lower roller, and the inner liner tube located between them are aligned with each other).

[0017] Preferably, the annular protrusions can be located at both ends (both ends of the circumferential surface) of the upper roller. In this case, the length of the upper roller can be considered as the width of the inner liner tube after folding.

[0018] Preferably, the length of the lower roller is greater than the length of the upper roller, for example, it can be the same width as the inner liner tube. In this case, the annular groove is not located at the end of the lower roller.

[0019] Furthermore, the upper roller may or may not be equipped with a driving device; the lower roller may or may not be equipped with a driving device. When neither the upper nor the lower roller is equipped with a driving device, the upper and lower rollers can rotate due to the movement of the inner liner tube between them.

[0020] When both the upper and lower rollers are equipped with drive devices, they can share a common drive device. This common drive device drives the upper and lower rollers respectively through a transmission mechanism with two outputs, achieving synchronous drive of the upper and lower rollers based on their appropriate speed ratio. Alternatively, the upper and lower rollers can each have independent drive devices, driving them separately based on their appropriate speed ratio. During operation, the upper and lower rollers rotate in opposite directions and have the same linear velocity (the circumferential linear velocity of the surface in contact with the inner lining tube), jointly propelling the inner lining tube forward.

[0021] This invention is applied to an existing liner traction system for trenchless pipeline repair, enabling automatic folding of the liner during traction construction. The feeding mechanism is equipped with a liner stack, and the liner moves intermittently under the traction of the traction machine. When traction stops, the liner located in the folding area is folded by the folding mechanism. During traction (movement), the liner sent from the liner stack continuously passes through the gap between the upper and lower rollers. After being squeezed by the annular protrusion and annular groove to form an indentation, it continues to advance to the folding area of ​​the transmission platform (the area where the folding is achieved by the folding mechanism).

[0022] The beneficial effects of this utility model are: it can fold the inner lining tube (or other object to be folded) on both sides of the folding area of ​​the conveying platform to the middle, forming a folded inner lining tube, thereby reducing the labor intensity of the operators, improving work efficiency, and also helping to reduce the working area and reduce interference with the surrounding social life. Because a pressure roller mechanism is set at the feeding end of the folding device, an easily bendable indentation is formed on the folding part of the inner lining tube through the annular protrusion and annular groove between the upper and lower rollers. During subsequent folding, the inner lining tube will bend at the indentation, which not only facilitates folding but also ensures the accuracy of the folding position and improves the folding quality. Furthermore, when the upper roller and / or lower roller are equipped with a driving device, the traction force requirement can be effectively reduced, thereby reducing the tensile deformation of the inner lining tube caused by traction force, which is beneficial to ensuring the quality of subsequent engineering work. Attached Figure Description

[0023] Figure 1 This is a schematic diagram (left view) of an embodiment of the present invention applied to a liner traction system for trenchless pipeline repair. Figure 2 This is a schematic diagram of another embodiment of the present invention (top view, all folding plates and transition folding plates are in the initial state). Figure 3 This is a schematic diagram (front view) of the structure of the pressure roller mechanism of this utility model. Figure 4 This is a partially enlarged structural schematic diagram (front view) of the pressure roller mechanism of this utility model. Figure 5 This is a schematic diagram (front view) of the guide roller mechanism of this utility model. Figure 6 This is a schematic diagram (front view) of the structure of a curved folding plate with a flared rear end, which relates to this utility model. Figure 7 yes Figure 5 A schematic diagram of the structure of the folding plate shown (rear view). Figure 8 yes Figure 5 A schematic diagram of the folding plate shown (viewed from the right). Figure 9 This is a schematic diagram of the working mode of the folding mechanism of this utility model (front view, the left folding plate is in the initial state, the right folding plate is in the folded state, and the transition folding mechanism is not involved). Figure 10 This is a schematic diagram of the working mode of the folding mechanism of this utility model (front view, the left folding plate is in the initial state, the right folding plate is in the folded state, and the left side of the inner liner tube is in the state of being lifted by the transition folding mechanism).

[0024] Reference numerals: 1. Inner liner tube; 2. Stacked inner liner tubes; 3. Indentation; 4. Feeding mechanism; 5. Adjusting guide plate; 6. Conveying platform; 7. Horizontal roller; 8. Box; 9. Changing guide roller; 11. Upper roller; 12. Annular protrusion; 16. Lower roller; 17. Annular groove; 21. Horizontal guide roller; 23. Vertical guide roller; 31. Folding plate; 32. Folding plate bearing; 36. Transition folding plate. Detailed Implementation

[0025] See Figures 1 to 10This invention can be applied to trenchless pipeline repair liner traction systems and other suitable applications, for the automatic folding of liner tubes (or other objects to be folded) within the system, forming a liner traction system with automatic liner folding function. This liner traction system mainly consists of a feeding mechanism, a folding device, a traction machine, and other auxiliary facilities. The traction machine and feeding mechanism can both utilize existing technologies. The feeding mechanism can be equipped with a feeding guide roller 4. The liner tube (in a flat state) 1 pulled from the stack of liner tubes 2 passes over the feeding guide roller (usually the feeding guide roller can be positioned high, and the liner tube passes over the upper side of the feeding guide roller, see [reference]). Figure 1 (Example) Moving forward in a continuously flat state, the inner liner stack can be placed in box 8, with the top (and front, where appropriate) of the box opened, or the inner liner stack placed on a pallet, platform, or trailer (e.g., flatbed trailer) or any suitable location. The feeding guide roller is horizontally positioned, typically higher than the inner liner stack (high-positioned), allowing the inner liner to pass over the top of the feeding guide rail. The feeding guide roller can be a single roller, or, if necessary, multiple feeding guide rollers positioned front and rear, or a pair of rollers positioned vertically. When a pair of rollers is used, the inner liner can pass through the gap between the rollers. Supports can be provided at both ends of the feeding guide roller, and the feeding guide rail can be rotatably mounted on the corresponding supports via bearings. The folding mechanism is located in front of the feeding mechanism, and its feed end is typically lower than the feeding guide roller (when the feeding guide roller is high-positioned). After being pulled out from the inner liner stack 2, the inner liner passes over the top of the feeding guide roller 4 and enters the folding mechanism in a continuously flat state.

[0026] The traction machine is used to pull (drag) the liner pipe (or other similar object to be pulled, hereinafter the same) used for pipeline repair. The liner pipe can be made of UV-curable material. During use, the traction rope of the traction machine is fixedly connected to the front end (or traction end) of the liner pipe (or other object to be pulled) 1 via a connector (e.g., a clamp assembly secured with bolts). After starting the traction machine, the liner pipe is pulled by the traction rope. According to the intermittent working mode, the liner pipe in the folding area is folded by the folding device to a width that allows it to enter the pipeline to be repaired. The folded liner pipe is then dragged to the appropriate position in the pipeline to be repaired for subsequent curing. Any suitable traction machine capable of setting a traction rope, such as a winch, can be used. The loading mechanism is used to rotate the liner pipe stack 2 (a support that allows stacked rotation). During operation, the traction machine pulls the liner pipe, and the stacked rotation releases the liner pipe. During construction, the traction machine can be fixed on the ground next to the construction endpoint well, and the feeding mechanism can be set on the ground next to the construction starting well. The folding device can be set on the side of the feeding mechanism near the construction starting well. After the inner lining pipe is folded by the folding device, it enters the pipeline to be repaired through the starting well. Depending on the actual situation, guide rollers 9 can be set at the bending parts (parts where the direction is changed) and other required positions of the inner lining pipe (and traction rope) track to achieve track bending.

[0027] The folding device is used to fold the inner lining tube (in its flat state). Its conveying platform 6 is located in front of the feeding mechanism (with the direction of movement of the inner lining tube as the front and the opposite direction as the rear). The conveying platform is equipped with a pressure roller mechanism and a folding mechanism. The pressure roller mechanism is located on the feeding side (or rear) of the conveying platform and is equipped with an upper roller 11 and a lower roller 16 located below the upper roller. The distance between the upper roller and the lower roller can be set according to the thickness of the inner lining tube in its flat state to allow the inner lining tube to pass between the upper and lower rollers and to make moderate pressure contact with the upper and lower rollers so that the rotation of the upper and lower rollers can generate a certain pushing force on the inner lining tube. However, the gap should also be controlled not to be too small to avoid excessive compression that may have a negative impact on the inner lining tube. The gap between the annular protrusion 12 and the annular groove 17 should generally be slightly smaller than the gap between the upper and lower roller bodies (cylindrical bodies) to form an effective indentation 3 similar to a crease. Based on the same or similar mechanism as the crease, the crease makes it easy to bend, so the final folding position of the inner liner tube is the crease position. By appropriately controlling the gap between the annular protrusion and the annular groove, the folding requirements are met while avoiding damage to the inner liner tube.

[0028] If necessary, the upper roller can be raised and lowered (vertically adjustable) according to existing technology, and an upper roller lifting mechanism can be set up to adjust the distance between the upper and lower rollers according to actual needs.

[0029] Both the upper and lower rollers are centrally located (the transverse centers of the upper and lower rollers are aligned with the transverse center of the inner liner tube in its flat state). Annular protrusions are located at both ends (both circumferential ends) of the upper roller. Therefore, the length of the upper roller can be considered the width of the folded inner liner tube. The length of the lower roller can typically be greater than the length of the upper roller, for example, the same as the width of the inner liner tube, to facilitate the movement of the inner liner tube. The main bodies of both the upper and lower rollers can be cylindrical. The top height of the lower roller can be the same as the surface of the conveying platform (conveyor surface). The radius of the upper roller and the height of its shaft should not obstruct the tilting of the inner liner tube's sides. The radii of the upper and lower rollers can be different or the same. When their radii are different and each is equipped with a drive device (e.g., a geared motor, pneumatic motor, hydraulic motor, etc.), different speeds can be used to ensure that their linear velocities (circumferential linear velocities) are the same. When using the same drive device, the requirement for consistent linear velocities can also be achieved by appropriately selecting the speed ratio between the two outputs of the transmission mechanism.

[0030] The folding mechanism is located in front of the pressure roller mechanism and has two folding plates 31 on the left and right. A folding plate rotating shaft 32 extending longitudinally (front and back direction) (with the axis as the longitudinal line) is provided (connected) on one edge of the folding plate. The folding plate rotating shaft is rotatably connected to the conveying platform (for example, the folding plate rotating shaft is mounted on the conveying platform by bearings, or mounted on the frame supporting the conveying platform, etc.). The folding plate driving device (for example, a geared motor, pneumatic motor, hydraulic motor, etc.) drives the corresponding folding plate rotating shaft (connected in a way that can realize drive / transmission). During operation, the free edge of the folding plate (the edge opposite to the edge where the folding plate pivot is located) is initially positioned outside the pivot (laterally outside) and below the surface of the conveyor platform. The inner liner tube to be folded is placed on the conveyor platform (e.g., manually or mechanically dragged, for example, pulled by a traction machine). The corresponding parts on both sides of the inner liner tube are located on the folding plates on both sides. When the folding plate drive device drives the relevant folding plates to flip inward (from top to bottom), the inner liner tube on the folding plate flips along with the folding plate and overlaps the inner liner tube located in the middle, thus folding the inner liner tube. The flipping speed of the folding plate can be moderately controlled to facilitate force transmission and ensure proper and flat folding even if there are some folds / wrinkles on the inner liner tube located on the folding plate.

[0031] The folding of the inner liner tube can be performed sequentially. First, fold one side. After folding one side, return the folding plate to its initial state before folding the other side, thus avoiding interference between the two folding plates. Alternatively, both folding plates can be simultaneously flipped to a certain angle (a semi-folded state), and then the folding of the inner liner tube can be performed sequentially from this semi-folded state. Flipping the folding plates to a semi-folded state helps maintain the stability of the inner liner tube's position. When folding one side, the folding plate on the other side effectively prevents lateral movement of the inner liner tube, ensuring the required folding is achieved.

[0032] The dimensions (especially the lateral dimensions) and placement (lateral and longitudinal positions) of the folding plate are based on the folding requirements of the inner lining plate. For example, when the inner lining plate needs to be folded into three layers, the crease (bending part) of the corresponding inner lining tube should be located at 1 / 3 of the width of the inner lining tube (in its flat state). The lateral position of the folding plate can be determined accordingly, and the lateral dimension of the folding plate can be slightly less than 1 / 3 of the width of the inner lining tube. When the inner lining plate needs to be folded into two layers, 1 / 4 of the width of the inner lining tube on each side is folded. After folding, the folded parts on both sides meet to form one layer. The lateral position of the folding plate can be determined accordingly, and the lateral dimension of the folding plate can be slightly less than 1 / 4 of the width of the inner lining tube. The longitudinal position of the folding plate (including the length setting of the conveyor platform and the longitudinal relative position of the folding mechanism on the conveyor platform) can be determined based on the flexibility of the inner lining tube to achieve a smooth transition from the flat state to the folded state. The longitudinal dimension of the folding plate can be set according to actual needs to smoothly lift the inner lining tube (the part that needs to be folded on the corresponding side) to achieve folding.

[0033] Since the folding is performed in segments, except for the effective folding area formed by the first fold on the inner liner tube, which should include the front end of the inner liner tube (in this case, the front end of the inner liner tube should be placed within the effective folding area of ​​the folding mechanism), the effective folding areas formed by subsequent folds on the inner liner tube should connect with the effective folding areas formed by the previous fold on the inner liner tube (usually there should be some overlap). The traction distance before each fold can be reasonably set to ensure the above connection (overlap).

[0034] The shape of the folding plate (three-dimensional shape, where appropriate) and the specific installation position of the folding plate pivot (e.g., vertical position) should be adapted to the folding requirements of the inner liner tube. If necessary, the relationship between the crease position and the installation position of the folding plate pivot can be determined through simulation models and experiments, and the installation position of the folding plate pivot can be reasonably set according to the folding requirements.

[0035] The longitudinal indentation 3 formed by pressing the annular protrusion and annular groove on the inner liner tube should be consistent with the bending part that should be formed after folding. The lateral position of the annular protrusion and annular groove can be determined according to the folding requirements of the inner liner tube.

[0036] In a preferred embodiment, two folding mechanisms are used, spaced apart front to back, and can be referred to as the front folding mechanism and the rear folding mechanism, respectively. By setting a reasonable spacing between the two folding mechanisms and coordinating (e.g., synchronizing) their folding actions, the inner liner tube between them (and within a certain range in front of the front folding mechanism) can be folded neatly. The area on the conveyor platform where the inner liner tube can be folded neatly can be called the effective folding area. After each fold is completed (except for the last fold), the traction machine is started to move the inner liner tube forward a distance slightly shorter than the effective folding area, and then the traction is stopped to carry out the next fold.

[0037] When multiple folding plate mechanisms are provided, the folding plate in the rearmost folding mechanism should preferably adopt a curved surface with a flared rear end (see [reference]). Figures 6-8 For example, this facilitates the gradual deformation of the inner liner tube and avoids excessive local stress at the contact point between the inner liner tube and the rear edge of the folding plate, which could cause adverse effects. For the same reason, when there is only one folding plate mechanism (which can be regarded as the last folding mechanism), its folding plate also adopts a curved surface with a flared rear end.

[0038] Except for the final folding mechanism, the folding plates of other folding mechanisms may not have flared openings (the front and back are consistent).

[0039] Depending on actual needs, a transition folding mechanism can be provided on the conveying platform (or omitted if appropriate). The transition folding mechanism is located between the pressure roller mechanism and the folding mechanism, and includes two transition folding plates 36 on the left and right sides. One edge of each transition folding plate is equipped with a longitudinally extending transition folding plate shaft, which is rotatably connected to the conveying platform (e.g., mounted on the conveying platform via bearings, or mounted on a frame). A transition folding plate drive device (e.g., a geared motor, pneumatic motor, hydraulic motor, etc.) drives the corresponding transition folding plate shaft. During operation, the free edge of the transition folding plate is initially located outside the transition folding plate shaft. After the inner lining tube to be folded is placed on the conveying platform, the corresponding parts on both sides of the inner lining tube are located on top of the respective transition folding plates. The transition folding plate drive device can rotate the transition folding plate upwards (with the free edge upwards) at a certain angle, resulting in an inclined shape with the free edge on the outer upper side. The inclination angle (the angle between the main body of the transition folding plate and the horizontal plane) should be less than 90°, typically between 15° and 60°.

[0040] The maximum tilt angle (also known as the maximum flip angle) of the transition folding plate for each transition folding mechanism can be set, for example, 15°, 30°, 45°, or 60°. When the transition folding plate flips upward, the inner liner tube located above the transition folding plate also tilts upward (outer edge upward) along with the transition folding plate. The maximum flip angle of the transition folding plate can be set appropriately. Through the coordination of the transition folding plate and the folding plate, the deformation of the inner liner tube during the transition process from a flat state to a folded state is realized and supported, thereby reducing the folding difficulty of the folding mechanism and avoiding or mitigating the adverse effects on the inner liner tube caused by excessive force on the folding plate or local overstretching of the inner liner tube.

[0041] In a preferred embodiment, there are two transition folding mechanisms, spaced apart front and back, which can be referred to as the front transition folding mechanism and the rear transition folding mechanism, respectively. For the inner lining pipe of underground pipelines with large diameter, the folding can be made smoother by the coordination of the two transition folding mechanisms and the two folding mechanisms.

[0042] The transition folding plate of the transition folding mechanism adopts a curved surface with an flared rear end to adapt to the gradual deformation of the inner liner tube during the transition process from a flat state to a folded state.

[0043] The lateral position of the transition folding plate (which can be based on the lateral position of the rotation axis) can be the same as the lateral position of the folding plate on the same side (same side in the left-right direction), or it can be located outside the lateral position of the folding plate on the same side. Furthermore, the lateral position of the rear (rear side in the longitudinal direction) transition folding plate can be located outside the lateral position of the front (front side in the longitudinal direction) transition folding plate on the same side (see...). Figure 2 Example).

[0044] Whether and how many transition folding mechanisms are set up can be determined based on the specific characteristics of the inner liner tube. The necessity and economy of setting up transition folding mechanisms can be determined through experiments. The lateral position and longitudinal dimension of each transition folding plate are set or adjusted according to actual needs to adapt to the deformation requirements of the inner liner tube at the corresponding position (longitudinal position) so as to effectively push and support the inner liner tube to have the required state (spatial position and shape) at the corresponding part.

[0045] Under normal circumstances, the lateral positions of the free edges of the folding plate and the transition folding plate can be the same or approximately the same to accommodate the width / lateral coverage of the liner tube.

[0046] Depending on actual needs, a guide roller mechanism may or may not be provided. The guide roller mechanism is located on the discharge side (or front) of the conveyor platform, and includes a horizontal guide roller 21 and two vertical guide rollers 23. The horizontal guide roller is located above the conveyor platform (the conveyor platform below it), and the two vertical guide rollers are located on both sides of the gap between the horizontal guide roller and the conveyor platform. The distance between the two vertical guide rollers can be set according to the width of the inner liner tube in the folded state (usually slightly larger, so as to leave an appropriate gap for operation), so as to allow the inner liner tube in the folded state to pass between the two vertical guide rollers, and through the guiding constraint of the vertical guide rollers, the trajectory (lateral position) of the subsequent inner liner tube is adjusted and limited.

[0047] The adjusting guide plate 5 is set on both sides of the feed end of the conveyor platform. It adopts a vertical curved shape and extends longitudinally with a certain curvature. The inlet width (the lateral distance between the two adjusting guide plates at the inlet end / rear end) is greater than the outlet width (the lateral distance between the two adjusting guide plates at the outlet end / front end) to facilitate the feeding of the end of the inner liner tube from the inlet end between the two adjusting guide plates. The outlet width matches the width of the inner liner tube, and there is a straight section of equal width on the outlet side. During the traction process, the inner liner tube moves longitudinally in a straight line under the constraint of this straight section to achieve the purpose of position adjustment.

[0048] Parts of the conveyor platform can be configured as roller structures, while other areas can be flat (plate) structures. The use of rollers 7 helps reduce the movement resistance of the inner liner tube, but the roller configuration should not obstruct the installation and operation of other components (and structures). For example, in suitable areas of the platform, openings 8 are needed to allow the folding plates / transition folding plates to flip. In this case, the corresponding parts of the platform should preferably be flat to facilitate the opening of the openings and the installation of bearings for the folding plate / transition folding plate shafts.

[0049] All cylindrical rotating components in the folding device (upper roller, lower roller, horizontal guide roller, vertical guide roller, drum, etc.) can adopt a hollow structure, such as a cylindrical structure.

[0050] Each rotating shaft (including the rotating shafts of the folding plate and the transition folding plate, as well as the rotating shafts of the cylindrical rotating parts, etc.) can be rotatably connected to the frame (e.g., the planar frame and support of the conveying platform) by bearings or other suitable means. Corresponding rotating shaft supports and / or rotating shaft mounting structures can be set on the frame according to the specific position of the rotating shaft, so that the two ends of the rotating shaft can be mounted on their respective corresponding rotating shaft supports or rotating shaft mounting structures by bearings, thereby realizing the rotatable connection of each rotating shaft on the frame.

[0051] When necessary, the connection between the bearing housing used to mount the bearing and the frame (e.g., a rotating component support fixedly connected to the frame body or a rotating component mounting structure installed on the frame body) can be configured as a movable connection (e.g., a sliding connection), and a locking mechanism can be provided to fix the bearing housing, so that the position of the bearings at both ends of the rotating component can be adjusted according to actual needs, thereby achieving the adjustment of the rotating component position. Since the movement of the bearings and bearing housings at both ends of the same rotating component is limited by the rigidity of the rotating component, the movement mode (including trajectory) of the bearing housings at both ends of the same rotating component should be coordinated with each other. When designing related movable connections, the rigidity of the rotating component should be taken as a constraint.

[0052] The traction of the inner lining tube can be achieved using any of the folding-plate type automatic folding devices disclosed in this utility model. The folding device automatically folds the inner lining tube, so that the inner lining tube sent into the pipe to be repaired is in a folded state. It can be folded into three layers or two layers (for example, the two folded parts are joined together on the same layer). The outer end of the traction rope is fixedly connected to the end of the inner lining tube (which can be called the traction end or front end) that passes through the folding device. The traction machine is started to pull the inner lining tube to move until the inner lining tube is pulled into place.

[0053] The following example, using the automatic folding of the inner lining pipe in trenchless pipeline repair, further illustrates the usage of this utility model: The folding device of this utility model is used in an existing inner lining pipe traction system. The feeding mechanism of the inner lining pipe traction system and the folding device of this utility model are set on the ground next to the starting point well. The folding device is located in front of the feeding mechanism (in the direction of movement of the inner lining pipe, near the starting point well). The traction machine is set on the ground next to the ending point well. Auxiliary facilities such as guide rollers are arranged according to the requirements of the existing traction system. At the start of construction, the inner liner tube can be pulled out from the stack of inner liner tubes manually or by the traction rope of a traction machine. The inner liner tube pulled out from the roll is in a flat state. After passing around the feeding guide roller, it enters the folding mechanism (if a feeding mechanism or feeding guide roller is provided) or directly enters the folding mechanism (if a feeding mechanism or feeding guide roller is not provided). The inner liner tube entering the folding mechanism (if appropriate, the drive device of the upper roller and / or lower roller can be activated to drive the inner liner tube forward through the upper and lower rollers) will press two indentations on the inner liner tube. The size and effect of the indentations can be similar to the creases formed by long-term folding. When folding the inner liner tube, the inner liner tube is easy to bend at the indentation. The unclamped inner liner tube moves forward into the folding area on the transmission platform. In the folding area, the inner liner tube is folded by the folding mechanism (or the folding mechanism and the transition folding mechanism in coordination). If necessary, manual intervention can be used to correct the bending position deviation and smooth the wrinkles on the plane. The pulling (moving) and folding are carried out alternately until the folded inner liner is installed in place inside the pipe to be repaired.

[0054] To avoid interference between the two folding panels (especially when folded into three layers), one side can be folded first, followed by the other. For example, first flip one side (the horizontal side) of the folding panel to fold the folding area of ​​the inner lining tube in place, then return that side of the folding panel to its initial state (or initial position). Then, flip the other folding panel to fold the folding area of ​​the inner lining tube on the other side in place, and then return that other side of the folding panel to its initial state (or initial position). Alternatively, both sides can be flipped to a half-folded state first, and then one side can be folded before the other side. The half-folded state refers to the state where the folding panel is flipped to a certain angle (e.g., the angle between the main body of the folding panel and the horizontal plane is 30°-60°, such as 30°, 45°, or 60°).

[0055] In the case where a transition folding mechanism is provided, during the folding process of the folding mechanism on the inner liner tube, the transition folding mechanism works in coordination with the folding mechanism. When the folding plate on either side folds the inner liner tube on that side, the transition folding plate on the same side flips over, lifting the corresponding part of the inner liner tube upward.

[0056] When the total number of folding plate mechanisms and transition folding plate mechanisms is multiple, when folding or half-folding on either side, all folding plates and transition folding plates on the same side can be started to flip sequentially from front to back. After the folding plate or transition folding plate in front flips to a certain angle (e.g., 90° / (N+1), where N is the total number of folding mechanisms and transition folding mechanisms), the folding plate or transition folding plate behind starts to flip. The flipping speed (angular velocity) of each folding plate and transition folding plate is the same. The folding plate stops flipping when it reaches the target state (folded state or half-folded state). The transition folding plate stops flipping when it reaches the target state, but if the set maximum angle (or maximum flipping angle) has been reached before reaching the target state, it stops at the set maximum angle. If the set maximum angle is not greater than the angle of the half-folded state, the transition folding plate remains stationary at its maximum flipping angle during the process of the folding plate on the same side flipping from the half-folded state to the folded state.

[0057] The flat state of the inner lining tube referred to in this utility model is the flat state after the tube hole of the inner lining tube has basically disappeared, and the folded state of the inner lining tube is the state formed by folding it laterally on the basis of the flat state.

[0058] Unless otherwise specified, the preferred and optional technical means disclosed in this utility model can be arbitrarily combined to form several different specific embodiments when one preferred or optional technical means is a further limitation of another technical means.

Claims

1. An automatic folding device of the folding plate type, suitable for UV-curable repair materials, equipped with a conveying platform, characterized in that... The conveying platform is equipped with a pressure roller mechanism and a folding mechanism. The pressure roller mechanism is located on the feeding side of the conveying platform and is equipped with transverse rollers. The transverse rollers consist of an upper roller and a lower roller. Each side of the upper roller is provided with an annular protrusion for pressing indentations, and each side of the lower roller is provided with an annular groove corresponding to the corresponding annular protrusion. The folding mechanism is located in front of the pressure roller mechanism and is equipped with two folding plates on the left and right. One edge of the folding plate is provided with a longitudinally extending folding plate shaft, which is rotatably connected to the conveying platform through the folding plate shaft. The folding plate driving device drives the corresponding folding plate shaft.

2. The automatic folding apparatus of claim 1, wherein There are two folding mechanisms, spaced apart at the front and back.

3. The folding plate type automatic folding device as described in claim 1, characterized in that... When there are multiple folding plate mechanisms, the folding plate in the last folding mechanism adopts a curved surface with a flared rear end; when there is only one folding plate mechanism, its folding plate adopts a curved surface with a flared rear end.

4. The folding plate type automatic folding device as described in any one of claims 1-3, characterized in that... The conveying platform may or may not have a transition folding mechanism. The transition folding mechanism is located between the pressure roller mechanism and the folding mechanism. It has two transition folding plates on the left and right. A longitudinally extending transition folding plate shaft is set on one edge of the transition folding plate. The transition folding plate shaft is rotatably connected to the conveying platform. The transition folding plate drive device drives the corresponding transition folding plate shaft.

5. The automatic folding apparatus of claim 4, wherein There are two transition folding mechanisms, spaced apart at the front and back.

6. The automatic folding apparatus of claim 4, wherein The transition folding plate of the transition folding mechanism adopts a curved surface with an flared rear end.

7. The folding plate type automatic folding device as described in any one of claims 1-3, characterized in that... The feed end of the conveyor platform is equipped with two adjusting guide plates, which are symmetrically arranged on both sides of the feed end of the conveyor platform.

8. The automatic folding apparatus of claim 7, wherein The two adjusting guide plates are vertical curved surfaces that expand outwards from the rear end and are symmetrically arranged. The distance between the feed ends of the two adjusting guide plates is greater than the distance between the discharge ends.

9. The folding plate type automatic folding device as described in any one of claims 1-3, characterized in that... The discharge end of the conveying platform may or may not be equipped with a guide roller mechanism. The guide roller mechanism includes a horizontal guide roller and two vertical guide rollers. The horizontal guide roller is located above the conveying platform, and the two vertical guide rollers are located on both sides of the gap between the horizontal guide roller and the conveying platform.

10. The folding plate type automatic folding device as described in claim 9, characterized in that... The upper roller may or may not have a drive device; the lower roller may or may not have a drive device.

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