Efficient cutting and forming device for cross joint of roller compacted concrete gravity dam and using method of efficient cutting and forming device

Abstract

The invention discloses an efficient cutting and forming device for a cross joint of a roller compacted concrete gravity dam and a using method of the efficient cutting and forming device. The efficient cutting and forming device comprises a joint cutting unit and a laying unit. The joint cutting unit comprises a workbench and a cutting blade arranged at the bottom end of the workbench, the cutting blade is a rectangular steel plate and is perpendicularly fixed to the bottom face of the workbench, the lower portion of the blade is a transition section, and the transition section is gradually narrowed from the position connected with a blade body to the end. The laying unit comprises folding arms and a guide-in disc, the folding arms are used in pairs, the structures of the two folding arms are completely the same, and the guide-in disc is arranged at the front ends of the two folding arms and clamped between the two folding arms to rotate. The joint cutting unit is pressed downwards, the cutting blade cuts concrete, the transverse joint is formed after cutting is completed, the laying unit is used for laying the isolation material after cutting is completed, the isolation material is fed into the transverse joint, the concrete on the two sides of the transverse joint is isolated, and follow-up extrusion and closing are avoided.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of concrete cutting, and more particularly relates to an efficient cutting and forming device for transverse joints of roller compacted concrete gravity dams and a method of use thereof. BACKGROUND

[0002] In the field of water conservancy projects, especially in recent years, large-scale water conservancy projects for people's livelihood have been built, and roller compacted concrete gravity dams have been widely used due to their strong structural stability and high construction efficiency. However, roller compacted concrete is a mass concrete, and reasonable dam block segmentation is required during dam construction, resulting in a large number of transverse joints. The existence of these transverse joints is to adapt to the shrinkage deformation of concrete, avoid cracks in the dam body due to internal stress concentration, and ensure the long-term safety and stable operation of the dam structure. Therefore, accurate and efficient cutting of concrete to form transverse joints that meet design requirements is a crucial step in water conservancy construction.

[0003] In the prior art, concrete cutting mainly adopts two operation modes: pre-embedding and cutting. Pre-embedding involves embedding specific materials or structures at the designed joint position before concrete pouring, and forming a transverse joint after the concrete solidifies. Cutting is more widely used, and the mainstream construction scheme is "first rolling, then cutting, and finally re-rolling", that is, the roller compacted concrete is first rolled as a whole, then a special joint cutting device is used to cut a transverse joint at the designed position, and finally the concrete around the joint is re-rolled to ensure the density of the area. In addition, there are some joint cutting devices for specific scenarios, such as devices that use an electric tamper to achieve rapid up-and-down reciprocating motion for cutting joints, aiming to solve the problem of portable joint cutting.

[0004] However, the existing concrete cutting technology has many shortcomings. For pre-embedding construction, in small reservoirs and other construction sites with small dam block areas, it will hinder normal rolling construction, resulting in a significant reduction in construction efficiency. The "first rolling, then cutting, and finally re-rolling" scheme of the cutting type causes waste of resources such as manpower and material due to repetitive operations in the re-rolling process, and the joint quality after re-rolling cannot be effectively guaranteed. Therefore, an efficient cutting and forming device for transverse joints of roller compacted concrete gravity dams and a method of use thereof are needed to quickly and safely complete the joint cutting construction of roller compacted concrete dams, and to ensure the joint forming quality and flatness, while cutting the joints and laying the isolation material. SUMMARY

[0005] In view of the above defects or improvement needs of the prior art, the present application provides a roller compacted concrete gravity dam transverse joint efficient cutting and forming device and a use method thereof, a cutting blade cuts the concrete by a downward pressing cutting joint unit, a transverse joint is formed after cutting, and laying of isolation material is performed by a laying unit after the transverse joint cutting is completed, the isolation material is fed into the transverse joint, so that isolation is formed between the concrete on both sides of the transverse joint, and subsequent extrusion closing is avoided. After the concrete is cut, the concrete on both sides of the transverse joint is immediately isolated by using the isolation material, the cutting and isolation protection of the transverse joint can be completed by using the same device, the cutting joint and laying of the isolation material are simultaneously constructed, and the transverse joint construction of the roller compacted concrete dam is quickly and safely completed.

[0006] To achieve the above object, according to a first aspect of an embodiment of the present application, a roller compacted concrete gravity dam transverse joint efficient cutting and forming device is provided, comprising a cutting joint unit and a laying unit. The cutting joint unit comprises a workbench and a cutting blade arranged at the bottom end of the workbench, the cutting blade is a rectangular steel plate, is vertically fixed to the bottom surface of the workbench, and the lower part of the blade is a tapered section which is gradually narrowed from the position connected with the main body of the blade to the end. The laying unit comprises folding arms and a guide-in disc, the folding arms are used in pairs and have the same structure, and the guide-in disc is arranged at the front end of the two folding arms and rotates between the two folding arms.

[0007] Further, two bracket bearings are fixed at the rear end edge of the workbench, the bracket bearing comprises a bearing seat and a bearing body, the bearing seat is a cast part and has a U-shaped structure, a flange edge is arranged at the bottom, bolt holes are arranged on the flange edge, and the bracket bearing is fixed to the rear end edge of the workbench by bolts. The bearing body is a deep groove ball bearing which is embedded in the bearing seat, the outer ring of the bearing body is fixedly connected with the bearing seat by interference fit, and a raceway is arranged on the inner wall of the inner ring. The rear end of the folding arm is arranged in the bracket bearing, the folding arm is connected with the workbench through the bracket bearing, and the folding arm rotates along the bracket bearing to adjust the position.

[0008] Further, an inductive detection mechanism is fixed at the front end of the workbench, the inductive detection mechanism comprises a shell, an infrared emitter and a coordinate sensor. The shell is an aluminum alloy die-casting and has a cuboid structure, heat dissipation ribs are arranged on the surface, a mounting bracket is arranged on one side, and the bracket is fixed to the front end of the workbench by bolts. The infrared emitter and the coordinate sensor are mounted on the bracket in the shell, a partition plate is arranged between the two, a window for emitting infrared rays is arranged on the surface of the shell, and a transparent acrylic plate is arranged at the window.

[0009] Further, the infrared emitter in the sensing detection mechanism is used for emitting an infrared alignment line, and the coordinate sensor is used for inputting a coordinate to a background system, and a projection ray is projected by the sensing detection mechanism, and is used for adjusting the cutting seam line.

[0010] Further, a pair of isolating agent spraying mechanisms are arranged below the workbench along the length direction of the cutting blade, and the isolating agent spraying mechanisms are arranged on both sides of the cutting blade respectively.

[0011] Further, the isolating agent spraying mechanism is a galvanized steel pipe, both ends of which are fixed to the bottom of the workbench through pipe clamps, the pipe clamps are U-shaped bolt structures, and rubber pads are arranged between the pipe clamps and the workbench. A plurality of nozzle mounting holes are uniformly arranged on the steel pipe along the length direction of the steel pipe, an inner thread is arranged on the inner wall of the nozzle mounting hole, a nozzle is arranged in the nozzle mounting hole, and the nozzle is fixed in the mounting hole through thread connection, the spraying direction of the nozzle is towards the vertical steel plate, and the head of the nozzle is in a fan-shaped structure. The two galvanized steel pipes of the isolating agent spraying mechanism are connected through a tee pipe, and one end of the tee pipe is connected with a feeding hose.

[0012] Further, an isolating agent barrel is arranged on the workbench, the isolating agent barrel is preloaded with isolating agent, the feeding hose is connected with the isolating agent barrel, the isolating agent in the isolating agent barrel is conveyed to the isolating agent spraying mechanism through the feeding hose, and the isolating agent is sprayed on the surface of the cutting blade through the nozzle, so that the isolating agent uniformly covers the cutting blade.

[0013] Further, the cutting unit further comprises a rebound structure, the rebound structure is arranged on both sides of the bottom surface of the workbench, at least two groups of the rebound structure are arranged on each side, and the rebound structure comprises a pressing plate, a spring and a connecting plate. The connecting plate is in a rectangular plate structure, a boss for connecting the spring is arranged on one side surface of the connecting plate, the boss is in a cylindrical shape, and the boss is integrally formed with the connecting plate. One end of the spring is sleeved on the boss and is welded and fixed with the connecting plate to form a closed welding ring, and the other end is welded and connected with the pressing plate. A plurality of bolt holes are arranged on the connecting plate, the connecting plate is fixedly connected with the workbench through bolts, the bolts are uniformly arranged along the edge of the connecting plate, and a gasket is arranged between the head of the bolt and the connecting plate. The pressing plate is a rectangular metal plate, and the pressing plate is kept at a distance from the edge of the workbench, and the pressing plate moves up and down under the action of the spring and external pressure.

[0014] Further, a connecting piece is arranged on the top surface of the workbench, and the connecting piece is rotatably connected to the workbench through a rotating disc. The rotating disc comprises two stacked discs and a rotating shaft, the two discs are circular metal plates, a shaft hole adapted to the rotating shaft is arranged at the center of each disc, and a key groove is arranged on the inner wall of the shaft hole. The rotating shaft is a stepped shaft structure, a flat key is arranged on the surface of the rotating shaft corresponding to the key groove position, the rotating shaft is arranged in the shaft hole, the flat key is embedded in the key groove to achieve circumferential fixation of the two, and the disc can be rotated around the rotating shaft by 360 degrees.

[0015] According to a second aspect of the embodiment of the present application, a use method of the efficient cutting and forming device for the transverse joint of the roller compacted concrete gravity dam is provided, and specifically includes the following steps: S100, measuring the design length of the transverse joint to be cut, combining the working radius and power output parameters of the construction machinery, and calculating the number of folding arms required; S200, the cutting blade is bolted to the workbench through the reinforcing ribs, the rear end of the folding arm is embedded in the inner ring of the bearing support, and the initial angle is locked through the ratchet and pawl of the non-return device; S300, the sensing detection mechanism is fixed to the front end of the workbench through the mounting bracket, the infrared emitter is activated after being connected to the power supply, the reference ray is projected, and the calibration is performed by using the coordinate sensor; S400, checking the rotation flexibility of the connecting part of the rotating disc, debugging the rebound performance of the rebound structure, and testing the spray angle of the release agent spraying mechanism to ensure the coverage rate of the release agent on the surface of the cutting blade; S500, the release material reel is sleeved on the connecting rod and fixed through the free end nut, the end of the release material is pulled out and temporarily fixed at the starting cutting point after being guided by the guide disc; S600, the construction machinery moves to the starting position, the height of the workbench is adjusted through the connecting part, the sensing system is started, the position of the workbench is finely adjusted according to the projected ray, the center line of the blade is ensured to coincide with the trajectory line, and the perpendicularity of the cutting joint is measured; S700, the release agent spraying mechanism is started 3s in advance to make the blade completely soaked, the construction machinery applies downward pressure, the cutting is performed to the design depth, the downward pressure is reduced, and the blade is slowly raised by the elastic force of the rebound structure; S800, after the first cutting joint is completed, the moving device is moved to the next cutting point, the folding arm is rotated to the horizontal position, the release material is pressed into the transverse joint by the guide disc, and the curved section at the edge of the disc ensures that the material is attached to the joint wall; S900, after the installation of the release material is completed, the next cutting point is cut, and the steps of cutting and pressing the release material are repeated until the concrete is completely cut.

[0016] Overall, compared with the prior art, the above technical solutions conceived by the present application can achieve the following beneficial effects: 1. The transverse joint efficient cutting forming device of the present application, by pressing the cutting joint unit, the cutting blade cuts the concrete, and forms a transverse joint after cutting. After the transverse joint cutting is completed, the laying unit lays the isolation material, and the isolation material is sent into the transverse joint to isolate the concrete on both sides of the transverse joint, avoiding subsequent extrusion and closing. After the concrete is cut, the isolation material is used to isolate the concrete on both sides of the transverse joint, and the same equipment can complete the cutting and isolation protection of the transverse joint, realizing simultaneous construction of cutting and laying isolation material, and quickly and safely completing the cutting construction of the transverse joint of the roller compacted concrete dam.

[0017] 2. The transverse joint efficient cutting forming device of the present application, by means of the isolation agent spraying mechanism, the isolation agent is sprayed on the surface of the cutting blade to isolate the cutting blade and the concrete, so that the two do not adhere to each other. When the cutting blade is pulled out of the concrete, it will not disturb the surrounding concrete, avoiding the problem of not compacting the concrete, forming quality problems, or increasing the construction process after rolling, causing waste of resources.

[0018] 3. The transverse joint efficient cutting forming device of the present application, the rebound structure provides elastic force for the workbench, so that the cutting blade can be easily pulled out of the concrete after cutting, and will not cause secondary disturbance to the two sides of the concrete that has been rolled, improving the construction efficiency.

[0019] 4. The transverse joint efficient cutting forming device of the present application, the connecting piece connects the construction machinery and the workbench, and the construction machinery provides power for the workbench to move the device and cut the concrete. The connecting piece is detachable and can be designed in different connection forms to adapt to different construction machinery. The on-site construction machinery auxiliary device can complete the work, and through the rotation of the turntable, the construction machinery can complete the construction at any position beside the concrete pouring area, avoiding damage to the concrete area during cutting. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a first view structure schematic diagram of an embodiment of the transverse joint efficient cutting forming device of the present application for roller compacted concrete gravity dam; Figure 2 It is a second view structure schematic diagram of an embodiment of the transverse joint efficient cutting forming device of the present application for roller compacted concrete gravity dam; Figure 3 It is a structure side view of an embodiment of the transverse joint efficient cutting forming device of the present application for roller compacted concrete gravity dam; Figure 4 It is a construction state schematic diagram of an embodiment of the transverse joint efficient cutting forming device of the present application for roller compacted concrete gravity dam; Figure 5A flow chart of a use method of the roller compacted concrete gravity dam transverse joint efficient cutting and forming device.

[0021] In all the drawings, the same reference signs refer to the same technical features, in particular: 1 - workbench, 2 - release agent spraying mechanism, 3 - induction detection mechanism, 4 - release agent barrel, 5 - connecting piece, 6 - rotating disc, 7 - release material reel, 8 - folding arm, 9 - leading-in disc, 10 - release material, 11 - cutting blade, 12 - rebound structure, 13 - transverse joint, 14 - construction machine, 15 - projection ray. DETAILED DESCRIPTION

[0022] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application is further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application. In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0023] As shown in Figures 1-4 The present embodiment provides a roller compacted concrete gravity dam transverse joint efficient cutting and forming device, which comprises a cutting joint unit and a laying unit. The cutting joint unit comprises a workbench 1 and a cutting blade 11 arranged at the bottom end of the workbench 1. The cutting blade 11 is a rectangular steel plate, which is vertically fixed to the bottom surface of the workbench 1. The lower part of the cutting blade is a tapered section, which gradually narrows from the connection position with the main body of the cutting blade to the end. The laying unit comprises a folding arm 8 and a leading-in disc 9. The folding arm 8 is used in pairs, and the two folding arms 8 are identical in structure. The leading-in disc 9 is arranged at the front end of the two folding arms 8 and rotates between the two folding arms 8. By pressing down the cutting joint unit, the cutting blade 11 cuts the concrete. After cutting, a transverse joint 13 is formed. After the cutting of the transverse joint 13 is completed, the laying unit lays the release material 10. The release material 10 is fed into the transverse joint 13 to form a separation between the concrete on both sides of the transverse joint 13, so as to avoid the closure of the transverse joint 13 caused by the subsequent flow of concrete. After the cutting of the concrete is completed, the release material 10 is used to separate the concrete on both sides of the transverse joint 13. The same equipment can complete the cutting and isolation protection of the transverse joint 13. The cutting joint and the laying of the release material are constructed simultaneously, and the cutting construction of the transverse joint of the roller compacted concrete dam is quickly and safely completed.

[0024] A plurality of reinforcing ribs are welded on both sides of the top of the cutting blade 11 along the length direction. The reinforcing ribs are connected to the transverse platform by bolts.

[0025] In a preferred embodiment, in order to avoid the tools placed on the workbench 1 from moving and falling, it can also be provided with the following structure: the workbench 1 is an integral plate, made of low-carbon steel plate, and the edge is provided with an upwardly bent flange, which forms a 90° angle with the platform body, and the height of the flange is the same as the thickness of the platform, and a plurality of lightening holes are formed on the flange.

[0026] Two bracket bearings are fixed at the rear end edge of the workbench 1, the bracket bearing includes a bearing seat and a bearing body, the bearing seat is a cast part in U-shaped structure, and a flange is arranged at the bottom, and a bolt hole is formed on the flange, and the bracket bearing is fixed to the rear end edge of the workbench through the bolt; the bearing body is a deep groove ball bearing, which is embedded in the bearing seat, and the outer ring of the bearing body is fixedly connected with the bearing seat in interference fit, and a raceway is arranged on the inner wall of the inner ring. The rear end of the folding arm 8 is arranged in the bracket bearing, and the folding arm 8 is connected with the workbench 1 through the bracket bearing, and the folding arm 8 is freely rotated along the bracket bearing to adjust the position.

[0027] The front end of the workbench 1 is fixed with an induction detection mechanism 3, the induction detection mechanism 3 includes a shell, an infrared emitter and a coordinate sensor, the shell is made of aluminum alloy by pressure casting and has a cuboid structure, and a heat dissipation rib is arranged on the surface, and a mounting bracket is arranged on one side and fixed to the front end of the workbench through a bolt; the infrared emitter and the coordinate sensor are mounted on the bracket in the shell, and a partition plate is arranged between the two, and a window for emitting infrared rays is formed on the surface of the shell, and a transparent acrylic plate is arranged in the window. The infrared emitter in the induction detection mechanism 3 is used for emitting an infrared alignment line, and the coordinate sensor is used for inputting coordinates to the background system, and a projection ray 15 is projected through the induction detection mechanism 3, which is used for adjusting the cutting line to ensure that the horizontal cutting does not deviate left and right and also ensures that the horizontal cutting is kept through from bottom to top.

[0028] A pair of isolating agent spraying mechanisms 2 are arranged below the workbench 1 along the length direction of the cutting blade 11, and the isolating agent spraying mechanisms 2 are arranged on both sides of the cutting blade 11 respectively. The isolating agent spraying mechanism 2 is a galvanized steel pipe, and the two ends of the pipe are fixed to the bottom of the workbench through pipe clamps, the pipe clamp is a U-shaped bolt structure, and a rubber pad is arranged between the pipe clamp and the workbench; a plurality of nozzle mounting holes are uniformly formed on the steel pipe along the length direction of the steel pipe, and an inner thread is arranged on the inner wall of the nozzle mounting hole, a nozzle is arranged in the nozzle mounting hole and fixed in the mounting hole through thread connection, the spraying direction of the nozzle is towards the vertical steel plate, and the head of the nozzle is in fan-shaped structure. The two galvanized steel pipes of the isolating agent spraying mechanism 2 are connected through a tee pipe, and one end of the tee pipe is connected with a feeding hose. An isolating agent barrel 4 is further arranged on the workbench 1, and the isolating agent barrel 4 is pre-filled with isolating agent, the feeding hose is connected with the isolating agent barrel 4, and the isolating agent in the isolating agent barrel 4 is conveyed to the isolating agent spraying mechanism 2 through the feeding hose, and the isolating agent is sprayed on the surface of the cutting blade 11 through the nozzle to make the isolating agent evenly cover the cutting blade 11.

[0029] It can be understood that the cutting blade 11 is sprayed with the isolating agent by the isolating agent spraying mechanism 2 on the surface of the cutting blade 11 to isolate the cutting blade 11 and the concrete, so that no adhesion occurs between the two, and no disturbance is caused to the surrounding concrete when the cutting blade 11 is pulled out of the concrete, thereby avoiding the quality problem of the concrete being not compacted, increasing the construction process after the concrete is re-rolled, and causing waste of resources.

[0030] The cutting unit further comprises a rebound structure 12 arranged on both sides of the bottom surface of the workbench 1, and at least two groups are arranged on each side. The rebound structure 12 comprises a pressing plate, a spring and a connecting plate. The connecting plate is a rectangular plate structure, one side surface of which is provided with a boss for connecting the spring, and the boss is cylindrical and integrally formed with the connecting plate. One end of the spring is sleeved on the boss and welded and fixed with the connecting plate to form a closed welding ring, and the other end is welded and connected with the pressing plate. A plurality of bolt holes are arranged on the connecting plate, and the connecting plate is fixedly connected with the workbench through bolts. The bolts are uniformly arranged along the edge of the connecting plate, and a gasket is arranged between the bolt head and the connecting plate. The pressing plate is a rectangular metal plate, which is kept a distance from the edge of the workbench and moves up and down under the action of the spring and external pressure.

[0031] It can be understood that the rebound structure 12 provides the workbench 1 with elastic force, so that the cutting blade 11 can be easily pulled out of the concrete after the cutting is completed, and no secondary disturbance is caused to the two sides of the concrete that have been rolled, thereby improving the construction efficiency.

[0032] The top surface of the workbench 1 is also provided with a connecting piece 5, which is rotatably connected to the workbench 1 through a turntable 6. The turntable 6 comprises two stacked discs and a rotating shaft. The two discs are circular metal plates, and the center of each disc is provided with a shaft hole adapted to the rotating shaft. The inner wall of the shaft hole is provided with a key groove. The rotating shaft is a stepped shaft structure, and a flat key is arranged on the surface of the rotating shaft corresponding to the position of the key groove. The rotating shaft is arranged in the shaft hole, and the flat key is embedded in the key groove to achieve circumferential fixation, central alignment and connection. The disc can rotate 360° around the rotating shaft. A damper is arranged between the connecting part of the two discs and the rotating shaft. The damper is an annular structure, and the inner side is provided with a through hole adapted to the rotating shaft. The outer edge is provided with a protrusion. The damper is sleeved on the outer side of the rotating shaft, and the protrusion is in abutment with the opposite side of the two discs, respectively. The top connecting piece is composed of two cast iron components. The cast iron component is a cuboid structure, one end of which is provided with a connecting hole for connecting with the power equipment. The inner wall of the connecting hole is provided with an internal thread. The other end is fixedly connected with the top of the disc through welding, and the welding part forms a continuous welding bead. The bottom of the disc is provided with a detachable component. The component is a circular plate adapted to the diameter of the disc, and the edge is uniformly provided with a buckle in the circumferential direction. The buckle is an L-shaped metal sheet, one end of which is welded with the detachable component, and the other end is bent outward. The bottom edge of the disc is provided with a clamping groove corresponding in position. The clamping groove is a rectangular groove, and the buckle and the clamping groove are connected.

[0033] It can be understood that the construction machinery 14 is connected with the workbench 1 through the connecting piece 5, and the workbench 1 is provided with power through the construction machinery 14 to drive the movement of the device and realize the cutting of the concrete. The connecting piece 5 is a detachable structure, which can be designed in different connection forms to adapt to different construction machinery 14. The on-site construction machinery 14 is used to assist the device to complete the work, and through the rotation of the turntable 6, the construction machinery 14 can complete the construction at any position beside the concrete pouring area, avoiding the damage of the construction machinery 14 to the concrete area during cutting.

[0034] A connecting rod is located at the center of the rear of the workbench 1. The connecting rod is a solid round steel rod, one end of which is fixedly connected to the inner ring of the bearing by welding, and the other end is a free end with external threads. A check device is installed inside the connecting rod, comprising a ratchet and a pawl. The ratchet has a ring structure, with its inner ring connected to the connecting rod by a key and its outer ring having evenly distributed teeth. The pawl has a plate-like structure, one end of which is hinged to the bearing seat by a pin, and the other end is a pawl that can mesh with the teeth of the ratchet. A return spring is connected between the middle of the pawl and the bearing seat. A hollow steel pipe is located between the two bearings. The steel pipe is a seamless steel pipe, with both ends welded and fixedly connected to the two bearing seats. The inside of the steel pipe is a hollow cavity with internal threads at both ends for connecting end caps. A release material roll 7 is fitted onto the connecting rod. The release material 10 is pulled from the release material roll 7 onto the guide disc 9, which straightens the release material 10 and presses it into the transverse slit 13.

[0035] The folding arm 8 is composed of multiple solid rods made of alloy steel with a chrome-plated surface. Adjacent rod segments are connected by hinges, each consisting of a pin and a bushing. The bushing is cylindrical and welded to the ends of the two rod segments. The pin passes through the bushing and has cotter pin holes at both ends for securing it. A bearing, a thrust ball bearing, is installed at the connection point of the folding arm 8. Its inner ring is fixedly connected to the end of one rod segment via an interference fit, and its outer ring is fixedly connected to the end of the other rod segment via an interference fit. A dust cover is provided on the outside of the bearing.

[0036] The guide disc 9 is a steel disc, formed by stamping high-strength steel plate. Its edge is bent to one side to form a gradient section, with a bending radius of one-tenth of the disc radius. Multiple through holes are opened along the circumference of the disc surface. A bearing mounting hole is opened at the center of the steel disc. The bearing is a tapered roller bearing, which is embedded in the mounting hole. The outer ring of the bearing is fixedly connected to the steel disc with a transition fit, and the inner ring is provided with internal threads.

[0037] The folding arm 8 is bolted to the guide disc 9. A flange, a circular steel plate with multiple evenly distributed bolt holes, is welded to the end of the folding arm 8. Corresponding bolt holes are also present on the steel disc. High-strength bolts are inserted into these holes and secured with double nuts. Spring washers are placed between the bolts and the flange. A damper, an annular rubber component, is located in the middle of the bearing and is fitted onto the outer side of the bearing's inner ring. Its two ends abut against the inner and outer rings of the bearing, respectively. An annular groove is provided on the surface of the damper.

[0038] Example 2 like Figure 5 As shown in the figure, this embodiment of the invention provides a method for using a high-efficiency cutting and forming device for transverse joints of roller-compacted concrete gravity dams, specifically including the following steps: S100, measure the design length of the cross-cut 13 to be cut, combine the working radius of the construction machinery 14 and the power output parameters to calculate the number of segments of the folding arm 8 required; S200, bolt the cutting blade 11 to the workbench 1 through the reinforcing ribs, embed the rear end of the folding arm 8 into the inner ring of the bearing support, and lock the initial angle through the ratchet pawl of the non-return device; S300, fix the induction detection mechanism 3 to the front end of the workbench through the mounting bracket, activate the infrared emitter after connecting the power supply, project the reference ray 15, and calibrate the cutting blade 11 using the coordinate sensor S400, check the rotation flexibility of the connecting piece 5, debug the rebound performance of the rebound structure 12, and test the spray angle of the release agent spraying mechanism 2 to ensure the coverage rate of the release agent on the surface of the cutting blade 11; S500, wrap the release material reel 7 into the connecting rod, fix it through the free end nut, pull out the end of the release material, and temporarily fix it at the starting cutting point after being guided by the guide disc 9; S600, move the construction machinery 14 to the starting position, adjust the height of the workbench 1 through the connecting piece 5, start the induction system, fine-tune the position of the workbench according to the projected ray 15, ensure that the center line of the blade coincides with the track line, and measure the perpendicularity of the cut; S700, start the release agent spraying mechanism 2 3s in advance to make the blade fully soaked, then apply downward pressure by the construction machinery, cut to the designed depth, then reduce the downward pressure, and use the elastic force of the rebound structure to slowly raise the blade; S800, after the first section of the cut is completed, move the device to the next cutting point, rotate the folding arm 8 to the horizontal position, press the release material 10 into the cross-cut 13 through the guide disc 9, and ensure that the material is attached to the seam wall through the curved section of the disc edge; S900, after the installation of the release material 10 is completed, cut at the next cutting point, repeat the steps of cutting and pressing the release material 10 into the cross-cut 13 until the entire concrete is cut.

[0039] Those skilled in the art will readily understand that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A high-efficiency cutting and forming device for transverse joints of roller-compacted concrete gravity dams, characterized in that, include: Cutting unit and laying unit; The cutting unit includes a workbench (1) and a cutting blade (11) located at the bottom of the workbench (1). The cutting blade (11) is a rectangular steel plate, which is vertically fixed to the bottom surface of the workbench (1). The lower part of the blade is a tapered section, which gradually narrows from the connection position with the blade body towards the end. The laying unit includes a folding arm (8) and an inlet disc (9). The folding arms (8) are used in pairs, and the two folding arms (8) have the same structure. The inlet disc (9) is located at the front end of the two folding arms (8) and rotates between the two folding arms (8).

2. The high-efficiency cutting and forming device for transverse joints of roller-compacted concrete gravity dams according to claim 1, characterized in that, The workbench (1) has two support bearings fixed at the rear edge. The support bearings include a bearing seat and a bearing body. The bearing seat is a casting with a U-shaped structure and a flange at the bottom. Bolt holes are opened on the flange and it is fixed to the rear edge of the workbench by bolts. The bearing body is a deep groove ball bearing, which is embedded in the bearing housing. Its outer ring is fixedly connected to the bearing housing by an interference fit, and the inner ring has a raceway on its inner wall. The rear end of the folding arm (8) is located in the bracket bearing, and the folding arm (8) is connected to the worktable (1) through the bracket bearing. The folding arm (8) can rotate freely along the bracket bearing to achieve its position adjustment.

3. The high-efficiency cutting and forming device for transverse joints of roller-compacted concrete gravity dams according to claim 2, characterized in that, The front end of the workbench (1) is fixed with a sensing and detection mechanism (3), which includes a housing, an infrared transmitter and a coordinate sensor. The outer shell is made of die-cast aluminum alloy and has a rectangular structure. The surface is equipped with heat dissipation fins and a mounting bracket on one side. The bracket is fixed to the front end of the workbench with bolts. The infrared transmitter and coordinate sensor are mounted on a bracket inside the housing, with a partition between them. The surface of the housing has a window for infrared rays to be emitted, and a transparent acrylic plate is installed at the window.

4. The high-efficiency cutting and forming device for transverse joints of roller-compacted concrete gravity dams according to claim 3, characterized in that, The infrared emitter in the sensing and detection mechanism (3) is used to emit an infrared alignment line, and the coordinate sensor is used to input the coordinates into the background system. The projection ray (15) is projected through the sensing and detection mechanism (3) to adjust the cutting line.

5. A high-efficiency cutting and forming device for transverse joints of roller-compacted concrete gravity dams according to any one of claims 1-4, characterized in that, A pair of release agent spraying mechanisms (2) are provided below the workbench (1) along the length of the cutting blade (11), and the release agent spraying mechanisms (2) are respectively located on both sides of the cutting blade (11).

6. The high-efficiency cutting and forming device for transverse joints of roller-compacted concrete gravity dams according to claim 5, characterized in that, The release agent spraying mechanism (2) is a galvanized steel pipe, and its two ends are fixed to the bottom of the workbench by pipe clamps. The pipe clamps are U-bolt structures and rubber pads are provided between them and the workbench. Multiple nozzle mounting holes are evenly opened along the length of the steel pipe. The inner wall of the nozzle mounting hole is provided with internal threads. A nozzle is installed in the nozzle mounting hole and is fixed in the mounting hole by threaded connection. The spray direction of the nozzle is towards the vertical steel plate, and the nozzle head has a fan-shaped structure. The two galvanized steel pipes of the release agent spraying mechanism (2) are connected by a T-connector, and one end of the T-connector is connected to the feed hose.

7. The high-efficiency cutting and forming device for transverse joints of roller-compacted concrete gravity dams according to claim 6, characterized in that, The workbench (1) is also equipped with a release agent tank (4), which is pre-filled with release agent. The supply hose is connected to the release agent tank (4). The release agent in the release agent tank (4) is transported to the release agent spraying mechanism (2) through the supply hose and sprayed onto the surface of the cutting blade (11) through the nozzle, so that the release agent is evenly spread on the cutting blade (11).

8. A high-efficiency cutting and forming device for transverse joints of roller-compacted concrete gravity dams according to any one of claims 1-4, characterized in that, The cutting unit also includes a spring structure (12), which is located on both sides of the bottom surface of the workbench (1), with at least two sets on each side, including a pressure plate, a spring and a connecting plate; The connecting plate is a rectangular plate structure, and one side surface is provided with a boss for connecting the spring. The boss is cylindrical and integrally formed with the connecting plate. One end of the spring is sleeved on the boss and welded to the connecting plate to form a closed weld ring, and the other end is welded to the pressure plate. The connecting plate is provided with multiple bolt holes, and is fixedly connected to the workbench by bolts. The bolts are evenly arranged along the edge of the connecting plate, and washers are provided between the bolt heads and the connecting plate. The pressure plate is a rectangular metal plate that maintains a distance from the edge of the worktable and moves up and down under the action of springs and external pressure.

9. A high-efficiency cutting and forming device for transverse joints of roller-compacted concrete gravity dams according to any one of claims 1-4, characterized in that, The top surface of the workbench (1) is also provided with a connector (5), which is rotatably connected to the workbench (1) via a turntable (6); The turntable (6) includes two stacked discs and a rotating shaft. The two discs are circular metal plates, each with a shaft hole at its center that is adapted to the rotating shaft. The inner wall of the shaft hole is provided with a keyway. The rotating shaft has a stepped shaft structure, with a flat key on its surface corresponding to the keyway position. The rotating shaft passes through the shaft hole, and the flat key is embedded in the keyway to fix the two in the circumference, achieving a centered alignment connection. The disk can rotate 360° around the rotating shaft.

10. A method of using the high-efficiency cutting and forming device for transverse joints of roller-compacted concrete gravity dams as described in any one of claims 1-9, characterized in that, Specifically, the following steps are included: S100. Measure the design length of the transverse seam (13) to be cut, and calculate the number of sections of the required folding arm (8) in combination with the working radius and power output parameters of the construction machinery (14). S200, Connect the cutting blade (11) to the worktable (1) with a reinforcing rib by bolts, embed the rear end of the folding arm (8) into the inner ring of the bracket bearing, and lock the initial angle by the ratchet pawl of the check device; S300. Fix the sensing and detection mechanism (3) to the front end of the worktable using the mounting bracket. After connecting the power supply, activate the infrared emitter and project the reference ray (15). Use the coordinate sensor for calibration. S400, check the rotation flexibility of the turntable (6) of the connector (5), adjust the rebound performance of the rebound structure (12), and test the spray angle of the release agent spraying mechanism (2) to ensure the release agent coverage of the cutting blade (11) surface. S500, Insert the isolation material roll (7) into the connecting rod, fix it with the free end nut, pull out the end of the isolation material, guide it through the guide disc (9) and temporarily fix it at the starting cutting point; S600, the construction machinery (14) moves to the starting position, adjusts the height of the workbench (1) through the connector (5), starts the sensing system, and fine-tunes the position of the workbench according to the projection ray (15) to ensure that the blade centerline coincides with the trajectory line and measures the verticality of the cut. S700, start the release agent spraying mechanism 3 seconds in advance (2) after the blade is fully wetted, the construction machinery applies downward pressure, cuts to the design depth, reduces the downward pressure, and uses the elasticity of the rebound structure to make the blade rise slowly; S800. After the first section of the seam is cut, move the device to the next section of the cutting point, rotate the folding arm (8) to the horizontal position, and insert the disc (9) to press the isolation material (10) into the transverse seam (13). The curved section of the disc edge ensures that the material fits the seam wall. After the installation of S900 and the isolation material (10) is completed, the next cutting point is cut, and the steps of cutting and pressing the isolation material (10) are repeated until all the concrete is cut.

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