Tunnel waterproof board hot melt gasket making limiting device

Abstract

The present application relates to a kind of tunnel waterproof board hot melt gasket and sets up limiting device, including base, vertical arm, frame and multiple sets of laser limiting assembly.Vertical arm is fixed on base, frame is installed on vertical arm, and laser limiting assembly is installed on frame with interval.Laser limiting assembly includes multiple lasers and connecting block, servo motor and a shaft box, shaft box is matched with frame and is installed on frame with motor b drive shaft box to rotate.Connecting block is set on shaft box with interval and can move relative to shaft box.Laser, servo motor are respectively matched with connecting block one to one.Laser is fixed on the side of connecting block.Servo motor is fixed on the back side of shaft box and is matched with connecting block by screw lever, so that servo motor can drive corresponding connecting block to move reciprocating relative to shaft box.The present application improves the uniform distribution degree and parallelism degree of hot melt gasket distributed on the wall surface of tunnel, helps to improve the stress effect of hot melt gasket and waterproof board combination, and improves engineering construction quality.

Description

Technical Field

[0001] This invention relates to the field of devices used in the installation of waterproof membranes and hot-melt gaskets in railway tunnels, and specifically to a device for setting and limiting the position of hot-melt gaskets during the installation of waterproof membranes and hot-melt gaskets in tunnels. Background Technology

[0002] Tunnels represent a new form of human space expansion, and with the rapid development of transportation, tunnel excavation has gradually increased. During tunnel excavation, waterproof membrane gaskets are an indispensable accessory, primarily serving a fixing function. Hot-melt tunnel waterproof membrane gaskets are the most widely used type, made from high-temperature injection-molded polymer materials, such as low-density polyethylene, using specialized molds. They are used in the installation and fixing of waterproof membranes in water conservancy, railway, and highway tunnels.

[0003] When installing hot-melt gaskets, the vertical spacing should not exceed 100 cm, and each waterproof membrane should have at least 5 gaskets horizontally. The vertical and horizontal spacing at the top of the tunnel should be less than 50 cm, and they should be evenly distributed to ensure uniform stress distribution. When installing the hot-melt gaskets, use a nail gun to arrange them systematically on the tunnel excavation surface, both longitudinally and transversely, and then secure the geotextile. If the nail ends are protruding, hammer them flat to ensure no protruding nails pierce the waterproof membrane.

[0004] In current construction, when installing hot-melt gaskets for tunnel waterproofing membranes, the installation positions of each gasket are determined manually on-site using a measuring tape. Manual measurement not only has large errors, but also, because many parts of the tunnel wall are curved, the gasket positions after overall marking have large gaps and poor parallelism, which can easily lead to uneven distribution of the hot-melt gaskets bonded to the waterproofing membrane, thus affecting the quality of the project. Summary of the Invention

[0005] To improve the uniformity and parallelism of the hot-melt gaskets on tunnel waterproofing membranes, and to better ensure that the waterproofing membrane is securely fixed to the tunnel wall, preventing localized bulging, this invention provides a limiting device for setting the hot-melt gaskets on tunnel waterproofing membranes. This device helps to limit the position of the hot-melt gaskets, thereby improving the uniformity and parallelism of the hot-melt gaskets distributed on the tunnel wall. This helps to improve the bonding strength between the hot-melt gaskets and the waterproofing membrane, and enhances the quality of engineering construction.

[0006] The technical solution adopted by the present invention to achieve the above-mentioned technical objectives is: a limiting device for setting up hot melt gaskets for tunnel waterproofing membranes, comprising a base, a vertical arm, a frame, and multiple sets of laser limiting assemblies. The vertical arm is fixed to the upper part of the base, the frame is installed on the upper part of the vertical arm, and the multiple sets of laser limiting assemblies are installed alternately in the frame grid along the vertical direction.

[0007] Each laser limit assembly includes multiple lasers, multiple connecting blocks, multiple servo motors, and a shaft box.

[0008] The two ends of the axle box are pivotally matched with the frame, and a motor b is installed on the frame to drive the axle box to rotate around the horizontal axis.

[0009] The plurality of connecting blocks are arranged alternately on the axle box along the axial direction and are matched with the axle box by an axial track structure, so that the connecting blocks can reciprocate relative to the axle box along the axial direction.

[0010] The plurality of lasers and the plurality of servo motors are respectively matched one-to-one with the plurality of connecting blocks. The lasers are fixed on the front side wall of the connecting block. The servo motors are fixed on the rear side wall of the axle box and are matched with end blocks extending outward from the axle box on the rear side wall of the connecting block via levers, so that the servo motors can drive the corresponding connecting blocks to reciprocate relative to the axle box along the axial direction of the axle box.

[0011] As the connecting block reciprocates axially relative to the axle box, the axial distance between two adjacent lasers can be adjusted, thereby adjusting the lateral spacing of the laser spots on the tunnel wall. This allows for independent and flexible adjustment of the lateral / axial spacing between the laser lines emitted by two adjacent lasers in each laser limiting assembly. Simultaneously, multiple lasers in each laser limiting assembly are mounted on a separate axle box, which can rotate relative to the frame around a horizontal axis under the drive of motor b. This allows adjustment of the angle formed by the laser lines emitted by each laser in each laser limiting assembly relative to the horizontal plane, thereby adjusting the longitudinal spacing of the laser spots on the tunnel wall.

[0012] Furthermore, an axially oriented prism shaft is fixedly installed inside the axle box. The plurality of connecting blocks pass through the prism shaft and can slide relative to the prism shaft respectively.

[0013] Furthermore, it also includes a rotating platform, which is disposed on the upper part of the base and has a drive unit within the base capable of driving the rotating platform to rotate about a vertical axis. The vertical arm is fixed to the top surface of the rotating platform.

[0014] By connecting the frame supporting the laser positioning assembly to the rotating platform via the vertical arm, the laser of the laser positioning assembly can be conveniently and quickly aligned with the walls on both sides of the tunnel by utilizing the rotation of the rotating platform relative to the base.

[0015] Furthermore, the upright arm includes a pair of arm plates arranged opposite each other, and a plate-like structure is formed on the lower part of the frame between the two arm plates. A motor a matched with a drive shaft is fixedly mounted on the upright arm, and the plate-like structure on the lower part of the frame matches the drive shaft so that the motor a can drive the frame to rotate around a horizontal axis.

[0016] The axial extension direction of the drive shaft is consistent with the axial extension direction of the axle box, or in other words, the axial extension direction of the prism shaft.

[0017] The frame supporting the laser positioning assembly is connected to the rotating platform via a vertical arm, allowing the frame to rotate relative to the vertical arm around a horizontal axis. This rotation of the rotating platform relative to the base facilitates convenient and quick alignment of the laser positioning assembly's laser onto different directions of the tunnel wall, particularly the tunnel ceiling. This allows for laser alignment onto different tunnel wall surfaces without moving and fixing the entire device, significantly improving work efficiency. Furthermore, the alignment process with the side walls is seamless, and the positioning of the hot-melt pads across a specific area of ​​the tunnel wall forms a unified whole, ensuring better uniformity and parallelism of the hot-melt pads.

[0018] Furthermore, the lower part of the plate-like structure at the bottom of the frame is formed as a toothed panel. A pivot is provided between the two arm plates of the upright arm, and a gear on the pivot meshes with the teeth on the toothed panel.

[0019] The axial extension direction of the rotating shaft is consistent with the axial extension direction of the drive shaft.

[0020] An electromagnet assembly is provided at one end of the rotating shaft, and a switch assembly that can selectively control the on / off state of the electromagnet assembly is provided on the vertical arm.

[0021] The electromagnet assembly includes a support fixed to the upright arm and an electromagnetic ring mounted on the inner end of the support and fitted onto the outside of the rotating shaft. An iron ring opposite to the electromagnetic ring is fixedly disposed on the rotating shaft.

[0022] When energized, the electromagnetic ring attracts the iron ring, preventing the shaft from rotating relative to the upright arm. The meshing between the toothed faceplate and the gears on the shaft further hinders the rotation of the frame relative to the upright arm. Therefore, when the frame tilts to either side relative to the vertical direction, the meshing between the toothed faceplate and the gears resists the torsional torque caused by gravity, ensuring the safety and reliability of the frame in its tilted state. This reduces the static load on motor a when it is stationary, saves energy, and extends the service life of motor a.

[0023] When the power is off, the electromagnetic ring detaches from the iron ring and can no longer prevent the rotating shaft from rotating relative to the upright arm.

[0024] Furthermore, multiple connecting rods are fixedly mounted on the support base, with their free ends extending to the inner side of the upright arm and surrounding the side wall of the rotating shaft. The axial direction of the connecting rods is consistent with the axial direction of the rotating shaft. The arm plate of the upright arm has through holes for the connecting rods to pass through. The electromagnetic ring is fixed to the end of each connecting rod.

[0025] Alternatively, the connecting rod can be a telescopic rod capable of changing its axial length; or the connection structure between the connecting rod and the bearing seat can allow the connecting rod to have a travel clearance relative to the bearing seat along the axial direction of the rotating shaft; or the connection structure between the iron ring and the rotating shaft can allow the iron ring to have a travel clearance relative to the rotating shaft along the axial direction of the rotating shaft.

[0026] Furthermore, the switch assembly includes a lifting rod, a spring, a pair of Hall switches, and a top rod connected to one end of the lifting rod.

[0027] One end of the spring is sleeved on the other end of the lifting rod, and the other end of the spring is sleeved on a protrusion formed on the vertical arm. The vertical arm has a hole structure or a groove structure to match the lifting rod so that the lifting rod can reciprocate in the vertical direction.

[0028] The middle part of the lifting rod has a plate part, and multiple alternating through holes are formed on the plate part along the vertical direction. A partition is formed between two adjacent through holes.

[0029] Two Hall switches are fixed on the upright arm. At the same time, the Hall switch body of one Hall switch is disposed on both sides of the through hole on the plate body opposite to the sensing magnet, and the Hall switch body of the other Hall switch is disposed on both sides of the partition on the plate body opposite to the sensing magnet.

[0030] Both Hall switches are selected as either normally closed or normally open Hall switches.

[0031] The rotating shaft has grooves evenly distributed around its circumference on one side wall. The free end of the push rod is vertically opposite to the side wall of the rotating shaft with the grooves, so that the free end of the push rod can alternately contact the side wall of the rotating shaft and the bottom surface of the groove as the rotating shaft rotates, thereby pushing the lifting rod to move up and down alternately.

[0032] As the lifting rod moves up and down alternately, the two Hall switches alternately change their corresponding states with the through hole and the partition. Initially, one Hall switch corresponds to both sides of the through hole, and the other Hall switch corresponds to both sides of the partition. As the shaft rotates, the free end of the top rod changes from contacting the side wall of the shaft to contacting the bottom surface of the groove. During this process, the lifting rod moves downward, and the plate on it also moves downward synchronously with the lifting rod. The Hall switches previously corresponding to both sides of the through hole then correspond to both sides of the partition, and vice versa. Continuing to rotate the shaft, the free end of the top rod changes from contacting the bottom surface of the groove to contacting the side wall of the shaft. During this process, the lifting rod moves upward (reset), and the plate on it also moves upward synchronously with the lifting rod. The Hall switches previously corresponding to both sides of the partition then correspond to both sides of the through hole, and vice versa. This alternating change continues.

[0033] Furthermore, a roller is pivotally mounted at the free end of the top rod, and the side wall of the roller can contact the side wall of the rotating shaft and the bottom surface of the groove.

[0034] Furthermore, both Hall switches are normally closed Hall switches.

[0035] The control circuit of the switch assembly also includes intermediate relay one, intermediate relay two, intermediate relay three, and push-button switch.

[0036] The intermediate relay includes a normally open contact switch.

[0037] The intermediate relay 2 includes a normally open contact switch a and a normally open contact switch b.

[0038] The intermediate relay 3 includes a normally open contact switch a and a normally closed contact switch a.

[0039] The push-button switch includes a normally closed contact switch and a normally open contact switch that can be activated in conjunction with each other.

[0040] One Hall switch is connected in series with intermediate relay one, and another Hall switch is connected in series with intermediate relay two. The two parts are then connected in parallel and finally connected in series with the normally closed contact switch a of intermediate relay three.

[0041] The normally open contact switch of intermediate relay one is connected in parallel with the normally open contact switch a of intermediate relay two, and then connected in series with the coil of the electromagnetic ring to form branch a.

[0042] The normally open contact switch b of the intermediate relay two is connected in parallel with the normally open contact switch a of the intermediate relay three, and then connected in series with the intermediate relay three to form branch b.

[0043] The normally closed contact of the push button switch is connected in series in branch a, and the normally open contact of the push button switch is connected in series in branch b.

[0044] The beneficial effects of this invention are: This patent helps improve the uniformity and relative parallelism of the hot-melt gaskets on tunnel waterproofing membranes during construction, better ensuring that the waterproofing membrane is securely fixed to the tunnel wall and preventing localized bulging. Using this tunnel waterproofing membrane hot-melt gasket positioning device helps to limit the position of the hot-melt gaskets, thereby improving the uniformity and parallelism of the hot-melt gaskets distributed on the tunnel wall, which helps to improve the bonding strength between the hot-melt gaskets and the waterproofing membrane, and enhances the quality of engineering construction. Attached Figure Description

[0045] Figure 1 is a schematic diagram of the structure from one side of the implementation plan.

[0046] Figure 2 is a structural diagram of the central shaft box when multiple connecting blocks are assembled (cover plate open).

[0047] Figure 3 is a schematic diagram of the structure after the servo motor is installed on the rear side of the spindle box.

[0048] Figure 4 is a schematic diagram of the structure of Implementation Scheme 1 when viewed from the front.

[0049] Figure 5 is a cross-sectional view of the switch assembly (without the top rod installed).

[0050] Figure 6 is a partially enlarged structural diagram of the matching point between the central push rod and the rotating shaft.

[0051] Figure 7 shows a schematic diagram of the control circuit corresponding to the middle switch assembly.

[0052] Figure 8 is a schematic diagram of the usage status.

[0053] 1. Laser, 2. Connecting block, 21. Prismatic shaft, 22. End block, 3. Servo motor, 31. First servo motor, 32. Second servo motor, 33. Third servo motor, 34. Fourth servo motor, 35. Screw lever, 4. Axis box, 41. Housing, 411. Channel, 412. Shaft end, 42. Cover plate, 421. Strip through hole, 43. Ball bearing, 5. Toothed face plate, 51. Drive shaft, 52. Motor a, 6. Motor b, 7. Anti-torsion gear, 71. Rotating shaft, 711. Groove, 72. Iron ring, 8. Electromagnet assembly. 81 Electromagnetic ring, 82 Bearing seat, 821 Connecting rod, 9 Switch assembly, 91 Lifting rod, 92 Spring, 93 Plate body, 931 Through hole, 932 Partition, 94 Top rod, 941 Roller, 10 Base, 20 Rotary platform, 30 Vertical arm, 301 Boss, 40 Frame, 401 Countersunk hole, 50 Laser limit assembly; T1 Induction magnet a, T2 Induction magnet b, KH1 Hall switch body a, KH2 Hall switch body b; KA1 Intermediate relay body, KA 1-1 Normally open contact switch 1-1; KA2 intermediate relay body 2, KA 2-1 Normally open contact switch 2-1, KA 2-2 Normally open contact switch 2-2; KA3 intermediate relay three-body, KA 3-1 Normally open contact switch 3-1, KA 3-2 Normally closed contact switch 3-1; YA electromagnetic ring coil, L1 indicator light 1, L2 indicator light 2, SB self-reset push button switch. Detailed Implementation

[0054] The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the invention. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "front," "rear," and "middle" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0055] As shown in Figures 1 to 4, a limiting device for installing hot-melt gaskets on tunnel waterproofing membranes includes a base 10, a rotating platform 20, a pair of opposing vertical arms 30, a frame 40 pivotally matched between the upper ends of the opposing vertical arms 30, and three sets of laser limiting assemblies 50. The vertical arms 30 are fixed to the top surface of the rotating platform 20, which is mounted on the upper part of the base 10. A drive unit is provided within the base 10 to drive the rotating platform 20 to rotate relative to the base 10 about a vertical axis. The three sets of laser limiting assemblies 50 are distributed alternately along the vertical direction and installed within the grid of the frame 40.

[0056] Each laser limiting assembly 50 includes four lasers 1 (or laser emitters), four connecting blocks 2, four servo motors 3, and one axle box 4. The four lasers and the four servo motors are respectively matched one-to-one with the four connecting blocks.

[0057] The axle box 4 includes a box body 41 and a cover plate 42. A groove 411 along the axial direction of the axle box 4 is formed on the rear wall of the box body 41. The cover plate 42 is fixedly installed at the front port of the box body 41 with bolts or screws, and has four alternating strip-shaped through holes 421 along the axial direction of the axle box 4. Axle ends 412 are formed at both ends of the box body 41 to match the uprights of the frame 40. A motor b6 is mounted on the uprights of the frame 40 to drive the three axle boxes 4 to rotate / flip around a horizontal axis, allowing the axle boxes 4 to rotate to different angular positions relative to the horizontal plane.

[0058] A prism shaft 21 along the axial direction of the (shaft box 4) is fixedly installed inside the housing 41. After being fixed inside the housing 41, the prism shaft 21 cannot rotate relative to the housing 41 or move along the axial direction. Four connecting blocks 2, corresponding to each shaft box 4, are alternately distributed inside the housing 41 along the axial direction of the (shaft box 4) and pass through the prism shaft 21, so that the connecting blocks 2 can reciprocate relative to the shaft box 4 along the axial direction of the (shaft box 4).

[0059] The laser 1 is fixed to the front wall of the connecting block 2. The servo motor 3 is fixed to the rear outer wall of the housing 41 and is matched with the end block 22, which is located on the rear wall of the connecting block 2 and extends outward from the housing 41 through the channel 411, via the lever 35. This allows the servo motor 3 to drive the corresponding connecting block 2 to reciprocate relative to the axle box 4 along the axial direction of the axle box 4.

[0060] As shown in Figure 3, the four servo motors 3 are designated as a first servo motor 31, a second servo motor 32, a third servo motor 33, and a fourth servo motor 34. The first servo motor 31 and the second servo motor 32 are fixed at both ends of the housing 41, driving the connecting blocks 2 located at opposite ends of the housing 41 to reciprocate along the axial direction (of the shaft box 4). The third servo motor 33 and the fourth servo motor 34 are fixed relative to each other in the middle of the housing 41, driving the connecting blocks 2 located at opposite ends of the housing 41 to reciprocate along the axial direction (of the shaft box 4). It should be noted that the axial extension length of the strip-shaped through-hole 421 provided on the cover plate 42 should avoid restricting the axial reciprocating movement of each connecting block 2, and the axial extension length of the strip-shaped through-hole 421 should be greater than the outer diameter of the laser 1. Preferably, the four strip-shaped through-holes 421 shown in the figure can be connected to form a strip-shaped slot that penetrates most of the axial direction, similar to the channel 411.

[0061] As the connecting block 2 reciprocates relative to the axle box 4 along its axial direction, the axial distance between two adjacent lasers 1 can be adjusted, thereby achieving the purpose of adjusting the lateral spacing of the laser spots emitted by the lasers 1 on the tunnel wall (the spacing in the left-right direction as shown in Figure 8). In this way, the lateral / axial spacing between the laser lines emitted by two adjacent lasers 1 in each group of laser limiting assemblies 50 can be adjusted independently and flexibly. At the same time, multiple lasers 1 in each group of laser limiting assemblies 50 are respectively mounted on axle box 4, and the axle box 4 can rotate relative to the frame 40 around a horizontal axis under the drive of the motor b6, thereby adjusting the angle formed by the laser lines emitted by the lasers 1 in each group of laser limiting assemblies 50 with respect to the horizontal plane, thereby adjusting the longitudinal spacing of the laser spots emitted by each laser 1 on the tunnel wall (the spacing in the up-down direction as shown in Figure 8).

[0062] Mounting the connecting block 2 on the (six) prism shaft helps ensure that after the fixed assembly relationship between the laser 1 and the connecting block 2 is properly adjusted, during the reciprocating movement of the laser 1 with the connecting block 2, the laser beams emitted by the four lasers 1 on the same shaft box 4 can be stably kept in a plane and can be flipped to the horizontal plane. In this way, the three sets of laser beams in the three laser limiting assemblies 50 can form three relatively parallel rows (four columns) of beam points on the tunnel wall.

[0063] In most cases, the positions of the four lasers 1 in each of the three sets of laser limiting assemblies 50 remain in a vertically aligned relationship, which can be achieved by programming and controlling the servo motor 3. That is, when the frame 40 is set vertically, the positions of the four lasers 1 in each of the three sets of laser limiting assemblies 50 are in a vertically aligned state, thus ensuring that the lateral / axial spacing of the laser beams emitted by two adjacent lasers 1 in each set hitting the light spots on the tunnel wall is consistent. In special cases, the aforementioned state can be changed so that there are lateral differences between two adjacent lasers 1 in different sets.

[0064] A countersunk hole 401 is formed on the inner wall surface of the frame 40, and a shaft hole corresponding to and matching the shaft end 412 of the housing 41 is provided on the bottom surface of the countersunk hole 401. Ball bearings 43 are embedded in the corners of the axle box 4, and the ball bearings 43 are tangential to the side wall of the countersunk hole 401. During the rotation of the axle box 4 relative to the frame 40, the contact friction between the ball bearings 43 and the countersunk hole 401 drives the ball bearings 43 to rotate within the embedded cavity. Providing the ball bearings 43 to support the corners of the axle box 4 helps reduce the load on the motor b6.

[0065] As shown in Figures 1 and 4, the lower part of the frame 40 has a plate-like structure inserted between the two arm plates of the upright arm 30. A motor a52 with a matching drive shaft 51 is fixedly mounted on the upright arm 30. After the plate-like structure at the lower part of the frame 40 matches the drive shaft 51, the motor a52 can drive the frame 40 to rotate around the horizontal axis (of the drive shaft 51), allowing the frame 40 to tilt to both sides relative to the upright arm 30.

[0066] The axial extension direction of the drive shaft 51 is consistent with the axial extension direction of the axle box 4, or the axial extension direction of the prism shaft 21.

[0067] The frame 40 supporting the laser limiting assembly 50 is connected to the rotating platform 20 via the upright arm 30, allowing the frame 40 to rotate relative to the upright arm 30 around a horizontal axis. This rotation of the rotating platform 20 relative to the base 10 facilitates convenient and quick aiming of the laser 1 of the laser limiting assembly 50 onto the tunnel wall in different directions, particularly upwards onto the tunnel ceiling. This allows for aiming the laser 1 at different tunnel wall locations without moving and fixing the entire device, significantly improving work efficiency. Furthermore, the aiming process for the tunnel ceiling can be seamlessly integrated with the alignment of the side walls. This creates a unified system for limiting the hot-melt pads on the entire tunnel wall within a specific area, ensuring better uniformity and parallelism of the hot-melt pads.

[0068] As shown in the figure, the lower part of the plate-like structure at the bottom of the frame 40 is specifically designed as a toothed face plate 5 (incomplete gear). At the same time, a rotating shaft 71 is provided between the two arm plates of the vertical arm 30, and an anti-torsion gear 7 (or gear) is provided on the rotating shaft 71, which can mesh with the toothed surface portion of the toothed face plate 5 (it can be direct meshing or indirect meshing).

[0069] The axial extension direction of the rotating shaft 71 is consistent with the axial extension direction of the drive shaft 51.

[0070] An electromagnet assembly 8 is provided at the left end of the rotating shaft 71, and a switch assembly 9 is provided on the vertical arm 30 to selectively control the on / off state of the electromagnet assembly 8 (the electromagnetic ring 81 in it).

[0071] The electromagnet assembly 8 includes a support base 82 fixed on the upright arm 30 and an electromagnetic ring 81 installed on the inner end of the support base 82 and fitted outside the rotating shaft 71. An iron ring 72 opposite to the electromagnetic ring 81 is fixedly disposed on the rotating shaft 71.

[0072] Multiple connecting rods 821 are arranged alternately around the circumference of the bearing seat 82, surrounding the outer periphery of the rotating shaft 71, with the electromagnetic ring 81 fixed to the end of the connecting rod 821. The connecting rod 821 is a telescopic connecting rod capable of extending and retracting along its axial direction. An axial gap is formed between the opposing surfaces of the electromagnetic ring 81 and the iron ring 72. When the electromagnetic ring 81 is energized and attracts the iron ring 72, the axial extension and retraction of the connecting rod 821 causes the electromagnetic ring 81 to move slightly axially, resulting in the electromagnetic ring 81 and the opposing surfaces of the iron ring 72 coming into contact. At this point, the electromagnetic ring 81 and the iron ring 72 are attracted together as a whole. Because the bearing seat 82 and the connecting rods 821 are both fixed to the vertical arm 30, and the electromagnetic ring 81 is fixed to the end of the connecting rod 821, while the iron ring 72 is fixed to the rotating shaft 71 (and cannot rotate relative to the rotating shaft), a structure is formed that prevents the rotating shaft 71 from rotating.

[0073] If the rotating shaft 71 cannot rotate, the anti-torsion gear 7 also cannot rotate, thereby enabling the toothed plate 5 to rotate, so that the frame 40 is kept at a certain tilt angle to the left or right relative to the upright arm 30 in the relatively vertical direction.

[0074] Conversely, when the electromagnetic ring 81 is de-energized, since the electromagnetic ring 81 and the iron ring 72 are two separate independent bodies, the electromagnet assembly 8 cannot restrict the rotation of the iron ring 72 through the electromagnetic ring 81, and therefore cannot restrict the rotation of the shaft 71 carrying the anti-torsion gear 7. So when the motor a52 moves the toothed plate 5 to rotate, the toothed plate 5 can carry the anti-torsion gear 7 to rotate.

[0075] The connecting rod 821 can also be a regular connecting rod that cannot be extended or retracted. In this case, the iron ring 72 can have a (small) travel relative to the rotating shaft 71 along the axial direction of the rotating shaft. The so-called iron ring 72 being fixed to the rotating shaft 71 can be understood as a fixed assembly form that at least requires the iron ring 72 to not rotate relative to the rotating shaft 71 around the axis of the rotating shaft 71.

[0076] When energized, the electromagnetic ring 81 attracts the iron ring 72, preventing the rotating shaft 71 from rotating relative to the upright arm 30. At this time, the meshing relationship between the toothed plate 5 and the anti-torsion gear 7 on the rotating shaft 71 hinders the rotational tendency of the frame 40 relative to the upright arm 30. Therefore, when the frame 40 tilts to both sides relative to the vertical direction, the meshing relationship between the toothed plate 5 and the anti-torsion gear 7 resists the torsional torque generated by gravity, ensuring the safety and reliability of the frame 40 in its tilted state. This reduces the static load on the motor a52 when it is stationary, saving energy and extending the service life of the motor a52.

[0077] When the power is off, the electromagnetic ring 81 disengages from the iron ring 72 and can no longer prevent the rotating shaft 71 from rotating relative to the upright arm 30.

[0078] As shown in Figures 5 and 6, the switch assembly 9 includes a lifting rod 91, a spring 92, a pair of Hall effect switches, and a top rod 94 connected to the lower end of the lifting rod 91. The lower end of the spring 92 is sleeved on the upper end of the lifting rod 91, and the upper end of the spring 92 is sleeved on a boss 301 formed on the vertical arm 30. The vertical arm 30 has a hole structure or a groove structure to match the lifting rod 91, so that the lifting rod 91 can reciprocate in the vertical direction.

[0079] The lower middle part of the lifting rod 91 has a plate part 93, and multiple through holes 931 are formed on the plate part 93 along the vertical direction. The part between two adjacent through holes 931 is called a partition 932 (or partition).

[0080] Both Hall switches are fixed on the upright arm 30. After assembly (in the initial state), the Hall switch body a KH1 of one Hall switch is disposed on both sides of the through hole 931 on the plate 93 opposite to the sensing magnet a T1, and the Hall switch body b KH2 of the other Hall switch is disposed on both sides of the spacer 932 on the plate 93 opposite to the sensing magnet b T2.

[0081] Both Hall switches can be selected as normally closed Hall switches or normally open Hall switches.

[0082] The rotating shaft 71 has a section of its sidewall with grooves 711 evenly distributed around its circumference. The lower end of the push rod 94 is vertically aligned with the section of the rotating shaft 71 with the grooves 711, so that the lower end of the push rod 94 alternately contacts the sidewall of the rotating shaft 71 and the bottom surface of the grooves 711 as the rotating shaft 71 rotates, thereby pushing the lifting rod 91 to move up and down alternately. A roller 941 is pivotally provided at the lower end of the push rod 94. The sidewall of the roller 941 contacts the sidewall of the rotating shaft 71 and the bottom surface of the grooves 711, which can reduce relative frictional resistance and reduce wear and tear.

[0083] The radial depth of the groove 711 relative to the side wall of the rotating shaft 71 determines the vertical stroke of the lifting rod 91. Therefore, the depth of the groove 711 should meet the requirement that the two Hall switches alternately correspond to the through hole 931 and the spacer 932. In the initial state, the through holes 931 and spacers 932 corresponding to the two Hall switches can be adjacent (see Figure 5) or non-adjacent.

[0084] As the rotating shaft 71 rotates, the roller 941 of the push rod 94 alternately contacts the side wall of the rotating shaft 71 and the bottom surface of the groove. When in contact with the side wall of the rotating shaft 71, it pushes the push rod 94 upward, pushing the lifting rod 91 upward, at which time the spring 92 is compressed or further compressed; when the roller 941 disengages from the side wall of the rotating shaft 71, the spring 92 pushes the lifting rod 91 downward so that the roller 941 contacts the bottom surface of the groove 711.

[0085] As the lifting rod 91 moves up and down alternately, the two Hall switches can alternately change their corresponding states with the through hole 931 and the partition 932. That is:

[0086] In the initial state, one Hall switch corresponds to both sides of the through hole 931, and the other Hall switch corresponds to both sides of the partition 932.

[0087] As the rotating shaft 71 rotates (by one unit angle), the lower part of the top rod 94 changes from contacting the side wall of the rotating shaft 71 to contacting the bottom surface of the groove 711. During this time, the lifting rod 91 moves downward, and the plate part 93 on it also moves downward synchronously with the lifting rod 91. Then, the Hall switches that were previously located on both sides of the through hole 931 are now located on both sides of the partition 932, and the Hall switches that were previously located on both sides of the partition 932 are now located on both sides of the through hole 931.

[0088] As the rotating shaft 71 continues to rotate (by one unit angle), the lower end of the top rod 94 changes from contacting the bottom surface of the groove 711 to contacting the side wall surface of the rotating shaft 71. During this period, the lifting rod 91 moves upward to reset, and the plate part 93 on it also moves upward synchronously with the lifting rod 91. Then, the Hall switches that were previously located on both sides of the partition 932 are now located on both sides of the through hole 931.

[0089] As described above, this process is repeated continuously in an alternating manner.

[0090] The greater the distribution density of the grooves 711 provided on the rotating shaft 71, the smaller the angle per unit. Therefore, the higher the control precision of the on / off change of the electromagnet assembly 8 during the adjustment process of the frame 40 deflecting relative to the upright arm 30.

[0091] As shown in Figure 7, the pair of Hall switches are selected as normally closed Hall switches. A normally closed Hall switch means that when there is an obstruction between the Hall switch body and the corresponding sensing magnet, the switch is in the open state; conversely, when there is no obstruction between the Hall switch body and the corresponding sensing magnet, the switch is in the closed state.

[0092] That is, in addition to two normally closed Hall switches, the control circuit of the switch assembly 9 also includes intermediate relay one, intermediate relay two, intermediate relay three, self-reset button switch SB, indicator light 1 L1 and indicator light 2 L2.

[0093] The intermediate relay includes an intermediate relay body KA1 and a normally open contact switch 1-1KA. 1-1 .

[0094] The intermediate relay two includes an intermediate relay two body KA2 and a normally open contact switch 2-1KA. 2-1 With normally open contact switch 2-2KA 2-2 .

[0095] The intermediate relay three includes the intermediate relay three body KA3 and the normally open contact switch 3-1KA. 3-1 3-1KA normally closed contact switch 3-2 .

[0096] The self-reset push-button switch SB includes a normally closed contact switch and a normally open contact switch that can be linked together. When the self-reset push-button switch SB is pressed with a finger, its normally closed contact switch remains open, and its normally open contact switch remains closed. As long as the button switch is pressed, the states of the two contact switches will not change. After the button is released, the self-reset push-button switch SB is reset by the reset spring inside the switch. At this time, the normally closed contact switch remains closed, and the normally open contact switch remains open.

[0097] A Hall effect switch body aKH1 is connected in series with the intermediate relay body KA1 (or the coil part of intermediate relay one) to form branch one. A Hall effect switch body bKH2 is connected in series with the intermediate relay body KA2 (or the coil part of intermediate relay two) to form branch two. Branch one and branch two are then connected in parallel and finally connected to the normally closed contact switch 3-1KA of intermediate relay three. 3-2 Connected in series.

[0098] The normally open contact switch 1-1KA of the intermediate relay one 1-1 With the normally open contact switch 2-1KA of the intermediate relay two 2-1 After being connected in parallel, it is then connected in series with the electromagnetic ring coil YA of the electromagnetic ring 81 to form branch a.

[0099] The normally open contact switch 2-2KA of the intermediate relay two 2-2 The normally open contact switch 3-1KA of the intermediate relay three 3-1 After being connected in parallel, it is then connected in series with the three-body intermediate relay KA3 (or the three-coil part of the intermediate relay) to form branch b.

[0100] The normally closed contact of the self-reset push button switch SB is connected in series in branch a, and the normally open contact of the self-reset push button switch is connected in series in branch b.

[0101] To make it easier to see the power on / off status of branch a and branch b, the indicator light L1 can be connected in series in branch a, and the indicator light L2 can be connected in series in branch b.

[0102] The operation process of the control circuit shown in Figure 7 is as follows. In the following description, Hall switch body a KH1 is referred to as Hall switch KH1; Hall switch body b KH2 is referred to as Hall switch KH2; intermediate relay body KA1 is referred to as intermediate relay KA1, and its normally open contact switch 1-1 KA... 1-1 Called normally open switch KA 1-1 The intermediate relay body KA2 is referred to as intermediate relay KA2, and its normally open contact switch 2-1 KA is used.2-1 Called normally open switch KA 2-1 2-2 KA normally open contact switch 2-2 Called normally open switch KA 2-2 The intermediate relay body KA3 is referred to as intermediate relay KA3, and its normally open contact switch 3-1 KA is used. 3-1 Called normally open switch KA 3-1 3-1 KA normally closed contact switch 3-2 Called normally closed switch KA 3-2 .

[0103] (1) In the initial state, as shown in Figure 5, Hall switch KH1 is opposite to through hole 931 and is in an unobstructed state, and Hall switch KH1 is in a closed state at this time; Hall switch KH2 is opposite to partition 932 and is in an obstructed state, and Hall switch KH2 is in an open state at this time. The normally closed contact switch of the self-reset button switch SB is in a closed state and the normally open contact switch is in an open state.

[0104] When the normally open contact of the self-reset push-button switch SB is in the open state, the intermediate relay KA3 is in the de-energized state, and its normally open switch KA... 3-1 When in the open state, its normally closed switch KA 3-2 It is in a closed state.

[0105] Hall effect switch KH1, normally closed switch KA 3-2 If both are in the closed state, then the intermediate relay KA1 is energized, so the normally open switch KA... 1-1 It is in a closed state.

[0106] The normally closed contact of the self-resetting push button switch SB is in the closed state and the normally open switch KA is in the open state. 1-1 When closed, the electromagnetic ring coil YA is energized, so the electromagnetic ring 81 can generate magnetic attraction to hold the iron ring 72 so that the two form a whole. At this time, the frame 40 cannot rotate relative to the upright arm 30, that is, the rotating shaft 71 cannot rotate.

[0107] (2) After pressing the self-reset button switch SB, the normally closed contact switch of the self-reset button switch SB is in the open state and the normally open contact switch is in the closed state.

[0108] When the normally closed contact of the self-reset button switch SB is in the open state, the electromagnetic ring coil YA is de-energized, the electromagnetic ring 81 cannot attract the iron ring 72, and the rotating shaft 71 is in a state where it can rotate.

[0109] (3) When the self-reset button switch SB is kept in the pressed state and the toothed panel 5 drives the rotating shaft to rotate, the corresponding states of Hall switches KH1 and KH2 with the through hole 931 and the partition 932 will first change as follows: Hall switch KH1 is opposite to the partition 932 and is in the blocked state, and Hall switch KH1 is in the open state at this time; Hall switch KH2 is opposite to the through hole 931 and is in the unblocked state, and Hall switch KH2 is in the closed state at this time.

[0110] Hall switch KH2 is closed, and normally closed switch KA is closed. 3-2 If the circuit remains closed, the intermediate relay KA2 is energized, and its normally open switch KA... 2-1 , and normally open switch KA 2-2 All are in a closed state.

[0111] The normally open contact of the self-resetting push button switch SB is closed and the normally open switch KA is... 2-2 If the circuit is closed, then the intermediate relay KA3 is energized, and its normally open switch KA... 3-1 Normally closed switch KA is in the closed state. 3-2 It is in the disconnected state.

[0112] The normally open contact of the self-reset push-button switch SB remains closed, while the normally open switch KA... 3-1 If closed, the intermediate relay KA3 will remain energized, and its normally closed switch KA will remain open. 3-2 When kept in the off state, intermediate relays KA1 and KA2 will never be energized, regardless of which Hall switch is opposite the through hole (in the closed state).

[0113] (4) After rotating the frame 40 relative to the upright arm 30 to a suitable angle position, release the self-reset button switch SB. Then the self-reset button switch SB will reset, and its normally closed contact switch will return to the closed state and its normally open contact switch will return to the open state.

[0114] When the normally open contact of the self-reset push-button switch SB opens, the intermediate relay KA3 is de-energized, and its normally closed switch KA... 3-2 Normally open switch KA returns to its closed state. 3-1 Restore disconnected status.

[0115] ①If the Hall switch KH1 is opposite to the through hole 931 at this time, then as described in (1), the rotating shaft 71 cannot rotate;

[0116] ② If the Hall switch KH2 is aligned with the through hole 931 at this time, the intermediate relay KA2 is energized, and its normally open switch KA... 2-1 Normally open switch KA 2-2 All are in a closed state.

[0117] The normally closed contact of the self-resetting push button switch SB is closed, and the normally open contact of switch KA is closed. 2-1 When closed, the electromagnetic ring coil YA is energized, and the electromagnetic ring 81 generates a magnetic attraction force that attracts the iron ring 72 to form a whole, preventing the rotating shaft 71 from rotating.

[0118] (5) When the Hall switch KH2 is opposite to the through hole 931 (i.e., in the state corresponding to ②), after pressing the self-reset button switch, the normally closed contact switch of the self-reset button switch SB is in the open state and the normally open contact switch is in the closed state.

[0119] Normally open switch KA 2-2 When the normally open contact of the self-reset push-button switch SB is closed, the intermediate relay KA2 is energized, and its normally open switch KA... 3-1 Normally closed switch KA is in the closed state. 3-2 It is in the disconnected state.

[0120] The normally open contact of the self-reset push-button switch SB remains closed, while the normally open switch KA... 3-1 If closed, the intermediate relay KA3 will remain energized, and its normally closed switch KA will remain open. 3-2 When kept in the off state, intermediate relays KA1 and KA2 will never be energized, regardless of which Hall switch is opposite the through hole (in the closed state).

[0121] When the normally closed contact of the self-reset button switch SB is opened, the electromagnetic ring coil YA is de-energized, the electromagnetic ring 81 cannot attract the iron ring 72, and the rotating shaft 71 is in a state where it can rotate.

[0122] When the self-reset button switch SB remains pressed and drives the toothed panel 5 to rotate the shaft, the corresponding states of Hall switches KH1 and KH2 with the through hole 931 and the spacer 932 will first change as follows: Hall switch KH1 is opposite to the through hole 931 and is in an unobstructed state, at which time Hall switch KH1 is in the closed state; Hall switch KH2 is opposite to the spacer 932 and is in the obstructed state, at which time Hall switch KH2 is in the open state. However, because the normally closed switch KA 3-2 Since it remains in the off state, neither intermediate relay KA1 nor intermediate relay KA2 can be energized, regardless of which Hall switch is opposite the through hole (in the closed state).

[0123] (6) After rotating the frame 40 relative to the upright arm 30 to a suitable angle position, release the self-reset button switch SB. Then the self-reset button switch SB will reset, and its normally closed contact switch will return to the closed state and its normally open contact switch will return to the open state.

[0124] When the normally open contact of the self-reset push-button switch SB opens, the intermediate relay KA3 is de-energized, and its normally closed switch KA... 3-2 Normally open switch KA returns to its closed state. 3-1 Restore disconnected status.

[0125] ①If the Hall switch KH1 is opposite to the through hole 931 at this time, then the rotating shaft 71 cannot rotate as described in (1);

[0126] ② If the Hall switch KH2 is aligned with the through hole 931 at this time, the intermediate relay KA2 is energized, and its normally open switch KA... 2-1 Normally open switch KA 2-2 Both are in the closed state. At this time, the normally closed contact of the self-reset button switch SB remains closed, and the electromagnetic ring coil YA is energized. The electromagnetic ring 81 generates a magnetic attraction force and is attracted to the iron ring 72 to form a whole, so that the rotating shaft 71 cannot rotate.

[0127] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Many aspects of the present invention can be improved without departing from the overall concept. Those skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A limiting device for setting up hot-melt gaskets for tunnel waterproofing membranes, characterized in that: It includes a base, a vertical arm, a frame, and multiple sets of laser limiting assemblies. The vertical arm is fixed on the base, the frame is mounted on the vertical arm, and the multiple sets of laser limiting assemblies are mounted alternately on the frame in a vertical direction. Each laser limiting assembly includes multiple lasers, multiple connecting blocks, multiple servo motors, and a shaft box. The two ends of the shaft box are matched with the frame, and motor b is mounted on the frame to drive the shaft box to rotate. The multiple connecting blocks are arranged alternately on the shaft box along the axial direction and are matched with the shaft box through a track structure, so that the connecting blocks can move axially back and forth relative to the shaft box. The plurality of lasers and the plurality of servo motors are respectively matched one-to-one with the plurality of connecting blocks; The laser is fixed to the front side wall of the connecting block; The servo motor is fixed to the rear wall of the axle box and matches with an end block extending outward from the axle box on the rear wall of the connecting block via a screw lever, so that the servo motor can drive the corresponding connecting block to reciprocate relative to the axle box along the axial direction of the axle box. The arm includes a pair of arm plates, and the lower part of the frame has a plate-like structure inserted between the two arm plates; The upright arm is fixedly equipped with a motor a matched with a drive shaft, and the plate-like structure at the lower part of the frame is matched with the drive shaft so that the motor a can drive the frame to rotate around the horizontal axis. The axial extension direction of the drive shaft is consistent with the axial extension direction of the axle box.

2. The limiting device for setting up a hot-melt gasket for a tunnel waterproof membrane according to claim 1, characterized in that: The axle box contains a prism shaft fixed along the axial direction; the plurality of connecting blocks are inserted on the prism shaft and can slide relative to the prism shaft.

3. The limiting device for setting up a hot-melt gasket for a tunnel waterproof membrane according to claim 1, characterized in that: It also includes a rotating platform, which is located on the upper part of the base and has a drive unit inside the base that can drive the rotating platform to rotate about a vertical axis; the vertical arm is fixed to the top surface of the rotating platform.

4. The limiting device for setting up a hot-melt gasket for a tunnel waterproof membrane according to claim 1, characterized in that: The lower part of the plate-like structure is formed as a toothed panel; a rotating shaft is provided between the two arm plates of the vertical arm, and a gear on the rotating shaft meshes with the gear teeth on the toothed panel. The axial extension direction of the rotating shaft is consistent with the axial extension direction of the drive shaft; An electromagnet assembly is provided at one end of the rotating shaft, and a switch assembly that can selectively control the on / off state of the electromagnet assembly is provided on the vertical arm. The electromagnet assembly includes a support fixed on the upright arm and an electromagnetic ring mounted on the inner end of the support and fitted outside the rotating shaft; an iron ring opposite to the electromagnetic ring is fixedly disposed on the rotating shaft. When energized, the electromagnetic ring attracts the iron ring to prevent the shaft from rotating.

5. A limiting device for setting up a hot-melt gasket for a tunnel waterproof membrane according to claim 4, characterized in that: Multiple connecting rods are fixedly mounted on the bearing seat, and the free ends of the multiple connecting rods extend to the inner side of the vertical arm and surround the outer periphery of the side wall of the rotating shaft. The electromagnetic rings are fixed to the ends of each connecting rod; Alternatively, the connecting rod may be a telescopic rod capable of changing its axial length; or the connection structure between the connecting rod and the bearing seat may allow the connecting rod to have a gap relative to the bearing seat along the axial direction of the rotating shaft.

6. The limiting device for setting up a hot-melt gasket for a tunnel waterproof membrane according to claim 4, characterized in that: The connection structure between the iron ring and the rotating shaft allows for a gap between the iron ring and the rotating shaft along the axial direction of the rotating shaft.

7. A limiting device for setting up a hot-melt gasket for a tunnel waterproof membrane according to claim 4, characterized in that: The switch assembly includes a lifting rod, a spring, a pair of Hall switches, and a top rod connected to one end of the lifting rod; One end of the spring is fitted onto the protrusion formed on the vertical arm, and the other end is fitted onto the other end of the lifting rod; The vertical arm has a hole structure or a channel structure that matches the lifting rod, so that the lifting rod can move in the vertical direction; A plate portion is formed in the middle of the lifting rod, and multiple alternating through holes are formed on the plate portion along the vertical direction, with a partition between two adjacent through holes; Two Hall switches are fixed on the upright arm. The Hall switch body of one Hall switch is disposed on both sides of the through hole on the plate body opposite to the sensing magnet. The Hall switch body of the other Hall switch is disposed on both sides of the partition on the plate body opposite to the sensing magnet. Both Hall switches are selected as either normally closed Hall switches or normally open Hall switches; The rotating shaft has grooves evenly distributed around its circumference on one side wall. The free end of the push rod is vertically opposite to the side wall of the rotating shaft with the grooves, so that the free end of the push rod can alternately contact the side wall of the rotating shaft and the bottom surface of the groove as the rotating shaft rotates, thereby pushing the lifting rod to move up and down alternately. As the lifting rod moves up and down, the two Hall switches can alternately change their corresponding states with the through hole and the partition.

8. A limiting device for setting up a hot-melt gasket for a tunnel waterproof membrane according to claim 7, characterized in that: A roller is pivotally mounted at the free end of the top rod, and the side wall of the roller can contact the side wall of the rotating shaft and the bottom surface of the groove.

9. A limiting device for setting up a hot-melt gasket for a tunnel waterproof membrane according to claim 7, characterized in that: Both Hall switches are normally closed Hall switches; The control circuit of the switch assembly also includes intermediate relay one, intermediate relay two, intermediate relay three and push button switch; intermediate relay one includes a normally open contact switch, intermediate relay two includes a normally open contact switch a and a normally open contact switch b, intermediate relay three includes a normally open contact switch a and a normally closed contact switch a, and push button switch includes a normally closed contact switch and a normally open contact switch that can be linked. One Hall switch is connected in series with intermediate relay one, and another Hall switch is connected in series with intermediate relay two. The two parts are then connected in parallel and finally connected in series with the normally closed contact switch a of intermediate relay three. The normally open contact switch of intermediate relay one is connected in parallel with the normally open contact switch a of intermediate relay two, and then connected in series with the coil of the electromagnetic ring to form branch a; the normally open contact switch b of intermediate relay two is connected in parallel with the normally open contact switch a of intermediate relay three, and then connected in series with intermediate relay three to form branch b. The normally closed contact of the push button switch is connected in series in branch a, and the normally open contact of the push button switch is connected in series in branch b.

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