Tapping device for cast-in-place concrete sandwich thermal insulation system

Abstract

The invention relates to the technical field of heat preservation plate machining, in particular to a tapper device for a cast-in-place concrete sandwich heat preservation system, and solves the problems that when an existing sandwich heat preservation plate is tapped, the surface of the sandwich heat preservation plate is prone to deformation due to impact by adopting a single-side tapping mode, burrs are prone to being generated on the hole edge after tapping, and the machining efficiency is high. The device comprises a trepanning mechanism and a drilling transmission mechanism, the drilling transmission mechanism is installed on the inner side of the trepanning mechanism, the trepanning mechanism comprises a transmission sleeve, an annular drilling device is installed at the front end of the transmission sleeve, and a plurality of welding spot filling pieces are installed between the transmission sleeve and the annular drilling device; and a plurality of alloy blades are fixedly mounted on the outer side of the front end of the annular drilling device. According to the invention, the two sides of the sandwich insulation board are holed, so that the high-quality holing operation of the sandwich insulation board in a mounting state can be met, and the surface of the sandwich insulation board is effectively prevented from being impacted to deform and generate burrs.

Description

Technical Field

[0001] This invention relates to the field of insulation board processing technology, specifically to a hole-opening device for cast-in-place concrete sandwich insulation systems. Background Technology

[0002] External wall sandwich insulation involves filling the space between the inner and outer leaf walls of a building with a material that provides excellent thermal insulation, thereby achieving good insulation performance. Traditional external wall sandwich insulation projects typically use polystyrene boards as the insulation material for the inner and outer leaf walls. The reason for not using sintered stone, slag wool, or glass wool is that these materials are soft, absorb moisture, leading to reduced insulation performance, and are prone to collapse over time. When using polystyrene boards, they are generally placed in the cavity between the inner and outer leaf walls during construction. After installing the concrete sandwich insulation board, holes need to be drilled in the insulation board to facilitate the assembly of the formwork.

[0003] Existing methods for drilling holes in sandwich insulation panels using a single-sided drilling approach can easily cause the surface of the sandwich insulation panel to deform due to impact, and burrs are easily generated at the edge of the hole after drilling, affecting the drilling quality. Therefore, this method does not meet the current requirements. To address this, we propose a hole-drilling device for cast-in-place concrete sandwich insulation systems. Summary of the Invention

[0004] The purpose of this invention is to provide a hole-opening device for cast-in-place concrete sandwich insulation systems, in order to solve the problems mentioned in the background art, where the existing single-sided hole-opening method for sandwich insulation boards easily causes the surface of the sandwich insulation board to be deformed by impact, and the hole edges are prone to burrs after opening, affecting the opening quality.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a hole-opening device for a cast-in-place concrete sandwich insulation system, comprising a hole-opening mechanism and a drilling transmission mechanism, wherein the drilling transmission mechanism is installed on the inner side of the hole-opening mechanism, the hole-opening mechanism includes a transmission sleeve, an annular drill is installed at the front end of the transmission sleeve, a plurality of weld filler pieces are installed between the transmission sleeve and the annular drill, and a plurality of alloy blades are fixedly installed on the outer side of the front end of the annular drill. The drilling transmission mechanism includes a central transmission rod, a feeding slide rod slidably connected to the inner side of the rear end of the central transmission rod, an adjusting screw installed in the middle of the feeding slide rod, positioning rings installed on both sides of the front end of the central transmission rod, a connecting rocker arm rotatably connected to the inner side of the front end of the central transmission rod, a connecting post installed on the inner side of the two connecting rocker arms at their closest ends, a pre-cutting blade fixedly installed on the end of the two connecting rocker arms away from the connecting post, a movable push block installed between the two connecting rocker arms, a second support spring provided on one side of the movable push block, and a second guide post installed on the inner side of the second support spring.

[0006] Preferably, the opening mechanism further includes a connecting seat fixedly connected to the rear end of the transmission sleeve, and a transmission shaft is fixedly installed in the middle of the connecting seat. The transmission sleeve, the connecting seat, and the transmission shaft are coaxial.

[0007] Preferably, the transmission sleeve and the annular drill are provided with multiple welding holes, and the multiple welding filler pieces fill the inner side of the welding holes. The front end of the transmission sleeve and the annular drill are fixedly connected by the multiple welding filler pieces, and the multiple alloy blades are arranged circumferentially relative to the axis of the annular drill.

[0008] Preferably, a synchronous holding mechanism is installed on the outer side of the opening mechanism. The front end of the synchronous holding mechanism is provided with a sandwich insulation plate. The synchronous holding mechanism includes a sliding ring. The front end of the sliding ring is slidably connected to a connecting ring. The outer side of the connecting ring is rotatably connected to a plurality of central support legs. The rear end of the central support legs is provided with a plurality of first guide posts. The outer side of the first guide posts is provided with a first support spring. The outer side of the plurality of first support springs is provided with an installation collar.

[0009] Preferably, a central drilling mechanism is installed at the front end of the drilling transmission mechanism. The central drilling mechanism includes a central drill bit. Multiple threaded posts are installed on the outer side of the rear end of the central drill bit. Limiting posts are installed on the outer side of the threaded posts. The rear end of the central drill bit is inserted into the inner side of the front end of the central transmission rod and is in close contact with the front end of the second guide post. The central drill bit and the front end of the central transmission rod are connected by multiple limiting posts. The threaded posts pass through the limiting posts and are connected to the central transmission rod by threads. The central drill bit and the central transmission rod are fixedly connected by multiple limiting posts and threaded posts. The multiple limiting posts and threaded posts are arranged circumferentially relative to the axis of the central drill bit.

[0010] Preferably, the connecting ring is slidably connected to the transmission sleeve, the front end of the mounting sleeve is fixedly connected to the connecting ring, the front ends of the plurality of first guide posts all pass through the mounting sleeve and the plurality of first support springs and are threadedly connected to the sliding ring, the mounting sleeve and the sliding ring are slidably connected by the plurality of first support springs, the front end of the sliding ring passes through the connecting ring and is in close contact with the rear ends of the plurality of central support legs, and the plurality of central support legs, the first guide posts and the first support springs are all arranged circumferentially relative to the axis of the sliding ring.

[0011] Preferably, the rear end of the central transmission rod is fixedly connected to the connecting seat, the front end of the adjusting screw passes through the transmission shaft and the feeding slide in sequence and is rotatably connected to the central transmission rod, the adjusting screw and the feeding slide are connected by threads, the two ends of the feeding slide pass through the central transmission rod and are slidably connected to the inner wall of the transmission sleeve, and the middle part of the feeding slide slides linearly reciprocating along the axis of the central transmission rod.

[0012] Preferably, the front end of the central transmission rod is provided with a sliding groove, the movable push block, the second guide post and the second support spring are all disposed inside the sliding groove, the rear end of the second guide post passes through the movable push block, the second support spring and the sliding groove and is connected to the central transmission rod by a thread, the central transmission rod and the movable push block are connected by the second support spring, and the movable push block is slidably connected to the second guide post and the central transmission rod.

[0013] Preferably, both ends of the movable push block are in contact with the ends of the two connecting swing rods that are close to each other. The central drive rod and the two connecting swing rods are rotatably connected through connecting columns. The two connecting swing rods and the pre-cutting blades are installed symmetrically relative to the central drive rod. The distance between the two pre-cutting blades is consistent with the diameter of the annular drill.

[0014] Preferably, the two ends of the two connecting columns pass through the central drive rod and the connecting swing rod and are inserted into the inner sides of the two positioning rings. The front end of the central drive rod is fixedly connected to the two positioning rings, and the two positioning rings are installed symmetrically relative to the central drive rod.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention synchronously drives the transmission sleeve and the central transmission rod to rotate through the transmission shaft and the connecting seat. Then, the central transmission rod drives the central drill bit to perform a central drilling operation on the sandwich insulation board through multiple limiting posts and threaded posts. Multiple central support legs are synchronously unfolded and attached to the surface of the sandwich insulation board under the positioning action of the connecting ring. Then, the sliding ring synchronously squeezes the multiple central support legs under the elastic support action of the first support spring, which makes it easier to keep the axis of the central transmission rod at the center of the multiple central support legs, effectively improving the drilling quality of the sandwich insulation board. 2. In this invention, the movable pusher pushes two connecting rocker arms under the elastic support of the second support spring, causing the two connecting rocker arms to rotate in opposite directions relative to the central transmission rod via the connecting column. As a result, the two connecting rocker arms can automatically pop out from the groove at the front end of the central transmission rod under the pushing action of the movable pusher, and the two pre-cutting blades are in a parallel state. The connecting column and connecting rocker arms drive the two pre-cutting blades to perform a rotary cutting operation on the front end face of the sandwich insulation board and form a pre-cut groove. By performing the pre-cut groove operation before the annular drill drills open the sandwich insulation board, the deformation of the sandwich insulation board surface caused by the annular drill drill during the rotary cutting of the sandwich insulation board can be effectively reduced, the opening quality can be improved and the surface flatness of the sandwich insulation board can be maintained. 3. In this invention, the transmission sleeve drives multiple alloy blades to contact the rear end face of the sandwich insulation board through an annular drill, and performs hole-making operation on the sandwich insulation board. As the transmission sleeve moves forward along the axis of the central transmission rod, the annular drill can completely penetrate the sandwich insulation board and cut the pre-cut groove. When the adjusting screw rotates, it drives the two ends of the feeding slide to slide between the central transmission rod and the transmission sleeve. In this way, the waste material formed by the hole in the transmission sleeve can be quickly discharged through the feeding slide, keeping the inside of the transmission sleeve clean. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the synchronous holding mechanism of the present invention; Figure 3 This is a schematic cross-sectional view of the overall structure of the present invention; Figure 4 This is a cross-sectional structural diagram of the hole-opening mechanism of the present invention; Figure 5 For the present invention Figure 3 Enlarged structural diagram of region A in the middle; Figure 6 This is an exploded structural diagram of the synchronization holding mechanism of the present invention; Figure 7 This is a schematic diagram of the installation structure of the central drilling mechanism of the present invention; Figure 8 For the present invention Figure 7 A magnified structural diagram of region C in the middle; Figure 9 This is a schematic cross-sectional view of the central transmission rod of the present invention; Figure 10 For the present invention Figure 3 A magnified structural diagram of region B in the middle; Figure 11 This is a partial exploded structural diagram of the drilling transmission mechanism of the present invention.

[0017] In the diagram: 1. Synchronous holding mechanism; 101. Mounting collar; 102. Centered support leg; 103. Sliding ring; 104. First guide post; 105. First support spring; 106. Connecting ring; 2. Hole-opening mechanism; 201. Transmission sleeve; 202. Connecting seat; 203. Transmission shaft; 204. Annular drill; 205. Welding filler plate; 206. Alloy cutting tool; 3. Drilling transmission mechanism; 301. Central transmission rod; 302. Adjusting screw; 303. Material feeding slide bar; 304. Connecting swing arm; 305. Pre-cutting blade; 306. Positioning clasp; 307. Movable push block; 308. Second guide post; 309. Second support spring; 310. Connecting post; 4. Central drilling mechanism; 401. Central drill bit; 402. Limiting post; 403. Threaded post. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] Please see Figures 1 to 6 An embodiment of the present invention provides a hole-opening device for a cast-in-place concrete sandwich insulation system, comprising a hole-opening mechanism 2 and a drilling transmission mechanism 3. A synchronous holding mechanism 1 is installed on the outer side of the hole-opening mechanism 2. A sandwich insulation plate is provided at the front end of the synchronous holding mechanism 1. The synchronous holding mechanism 1 includes a sliding ring 103. A connecting ring 106 is slidably connected to the front end of the sliding ring 103. The front end of the sliding ring 103 passes through the connecting ring 106 and is in contact with the rear ends of a plurality of central support legs 102. A plurality of central support legs 102 are rotatably connected to the outer side of the connecting ring 106. A plurality of first guide posts 104 are installed at the rear ends of the central support legs 102. A first support spring 105 is provided on the outer side of the first guide posts 104. The plurality of central support legs 102, the first guide posts 104, and the first support spring 105 are all relative to the sliding ring 103. The axes of the three components are arranged in a circle. An installation collar 101 is installed on the outer side of the multiple first support springs 105. The front end of the installation collar 101 is fixedly connected to the connecting ring 106. The front ends of the multiple first guide pillars 104 all pass through the installation collar 101 and the multiple first support springs 105 and are connected to the sliding ring 103 by threads. The installation collar 101 and the sliding ring 103 are slidably connected by the multiple first support springs 105. The central support leg 102 unfolds synchronously under the positioning action of the connecting ring 106 and fits against the surface of the sandwich insulation board. Then, the sliding ring 103 squeezes the multiple central support legs 102 synchronously under the elastic support action of the first support springs 105, which makes it easier to keep the axis of the central transmission rod 301 at the center of the multiple central support legs 102, effectively improving the opening quality of the sandwich insulation board.

[0020] Please see Figure 2 , Figure 3 , Figure 7 and Figure 8 The drilling mechanism 2 includes a transmission sleeve 201, a connecting ring 106 slidably connected to the transmission sleeve 201, an annular drill 204 mounted on the front end of the transmission sleeve 201, multiple weld filler pieces 205 installed between the transmission sleeve 201 and the annular drill 204, multiple alloy cutting tools 206 fixedly mounted on the outer side of the front end of the annular drill 204, a connecting seat 202 fixedly mounted on the rear end of the transmission sleeve 201, and a transmission shaft 203 fixedly mounted in the middle of the connecting seat 202. The transmission sleeve 201, the connecting seat 202, and the transmission shaft 203 are connected together. The drive shaft 203 is coaxial, and multiple welding holes are provided between the transmission sleeve 201 and the annular drill 204. Multiple weld filler pieces 205 fill the inner side of the welding holes. The front end of the transmission sleeve 201 is fixedly connected to the annular drill 204 through multiple weld filler pieces 205. Multiple alloy blades 206 are arranged in a circle relative to the axis of the annular drill 204. The transmission sleeve 201 drives the multiple alloy blades 206 to contact the rear end face of the sandwich insulation board through the annular drill 204 and perform hole drilling operation on the sandwich insulation board.

[0021] Please see Figures 2 to 11 A drilling transmission mechanism 3 is installed inside the opening mechanism 2. The drilling transmission mechanism 3 includes a central transmission rod 301. The rear end of the central transmission rod 301 is fixedly connected to the connecting seat 202. A feeding slide rod 303 is slidably connected to the inner side of the rear end of the central transmission rod 301. An adjusting screw 302 is installed in the middle of the feeding slide rod 303. The front end of the adjusting screw 302 passes through the transmission shaft 203 and the feeding slide rod 303 in sequence and is rotatably connected to the central transmission rod 301. The adjusting screw 302 is connected to the feeding slide rod 303. The material slide bar 303 is connected by a thread. Both ends of the material slide bar 303 pass through the central transmission rod 301 and are slidably connected to the inner wall of the transmission sleeve 201. The middle part of the material slide bar 303 slides linearly back and forth along the axis of the central transmission rod 301. The adjusting screw 302 drives both ends of the material slide bar 303 to slide between the central transmission rod 301 and the transmission sleeve 201. Thus, the waste material formed by the opening in the transmission sleeve 201 can be quickly discharged through the material slide bar 303. Positioning rings 306 are installed on both sides of the front end of the central drive rod 301. The front end of the central drive rod 301 is fixedly connected to the two positioning rings 306. The two positioning rings 306 are installed symmetrically with respect to the central drive rod 301. A connecting rocker arm 304 is rotatably connected to the inner side of the front end of the central drive rod 301. A connecting post 310 is installed on the inner side of the two adjacent ends of the two connecting rocker arms 304. The central drive rod 301 and the two connecting rocker arms 304 are rotatably connected through the connecting posts 310. The two ends of the two connecting posts 310 pass through the central drive rod 301 and the connecting rocker arms 304 and are inserted into the two positioning rings 306. On the inner sides of both ends of the 6, pre-cutting blades 305 are fixedly installed at the ends of the two connecting rods 304 away from the connecting column 310. The two connecting rods 304 and the pre-cutting blades 305 are symmetrically installed relative to the central transmission rod 301. The spacing between the two pre-cutting blades 305 is consistent with the diameter of the annular drill 204. By performing pre-cutting groove operation before the annular drill 204 drills the sandwich insulation board, the two pre-cutting blades 305 can effectively reduce the deformation of the sandwich insulation board surface caused by the annular drill 204 rotating and cutting the sandwich insulation board, improve the drilling quality and keep the surface of the sandwich insulation board flat. A movable push block 307 is installed between the two connecting swing rods 304. Both ends of the movable push block 307 are in contact with the ends of the two connecting swing rods 304. A second support spring 309 is provided on one side of the movable push block 307. The central transmission rod 301 is connected to the movable push block 307 through the second support spring 309. A second guide post 308 is installed on the inner side of the second support spring 309. A sliding groove is provided at the front end of the central transmission rod 301. The movable push block 307, the second guide post 308, and the second support spring 309 are all located inside the sliding groove. The rear end of the second guide post 308 passes through the movable push block 307, the second support spring 309 and the slide groove, and is connected to the central transmission rod 301 by a thread. The movable push block 307 is slidably connected to both the second guide post 308 and the central transmission rod 301. Under the elastic support of the second support spring 309, the movable push block 307 pushes the two connecting swing rods 304 to rotate in opposite directions, so that the two connecting swing rods 304 can automatically pop out from the slide groove at the front end of the central transmission rod 301 and achieve the two pre-cutting blades 305 in a parallel state.

[0022] Please see Figure 8 and Figure 10A central drilling mechanism 4 is installed at the front end of the drilling transmission mechanism 3. The central drilling mechanism 4 includes a central drill bit 401. Multiple threaded posts 403 are installed on the outer side of the rear end of the central drill bit 401. Limiting posts 402 are installed on the outer side of the threaded posts 403. The rear end of the central drill bit 401 is inserted into the inner side of the front end of the central transmission rod 301 and is in contact with the front end of the second guide post 308. The central drill bit 401 and the front end of the central transmission rod 301 are connected by multiple limiting posts 402. The threaded posts 403 pass through the limiting posts 402 and are threadedly connected to the central transmission rod 301. The central drill bit 401 and the central transmission rod 301 are fixedly connected by multiple limiting posts 402 and threaded posts 403. The multiple limiting posts 402 and threaded posts 403 are arranged in a circle relative to the axis of the central drill bit 401.

[0023] In summary, when drilling holes in the sandwich insulation board, the front end of the central drive rod 301 is fixedly connected to the central drill bit 401 through multiple limiting posts 402 and threaded posts 403. The central drive rod 301 and the central drill bit 401 can be disassembled and assembled by separating the threaded posts 403 and the limiting posts 402. The material feeding slide rod 303 is inserted between the central drive rod 301 and the adjusting screw 302, and the rear end of the central drive rod 301 is fixedly connected to the transmission sleeve 201 through the connecting seat 202. When the power is turned on, the synchronous holding mechanism 1 is fitted onto the outside of the transmission sleeve 201. An external power source is fixedly connected to the drive shaft 203, allowing the external power source to synchronously drive the drive sleeve 201 and the central drive rod 301 to rotate via the drive shaft 203 and the connecting seat 202. The central drive rod 301 then drives the central drill bit 401 to perform a central drilling operation on the sandwich insulation board via multiple limiting posts 402 and threaded posts 403. During drilling, the central drive rod 301 is initially perpendicular to the surface of the sandwich insulation board. The mounting ring 101 is fixed to the drive sleeve 201 with screws. Multiple central support legs 102 are synchronously unfolded and fitted to the surface of the sandwich insulation board under the positioning action of the connecting ring 106. The sliding ring 103, under the elastic support of the first support spring 105, synchronously compresses the multiple central support legs 102, thus facilitating the maintenance of the axis of the central drive rod 301 at the center of the multiple central support legs 102, effectively improving the drilling quality of the sandwich insulation board.

[0024] After the central drill bit 401 drills a hole in the sandwich insulation board, the central drive rod 301 slides within the hole. The movable push block 307, under the elastic support of the second support spring 309, pushes the two connecting rocker arms 304, causing them to rotate in opposite directions relative to the central drive rod 301 via the connecting column 310. Consequently, under the pushing action of the movable push block 307, the two connecting rocker arms 304 automatically pop out from the groove at the front end of the central drive rod 301, thus enabling the two pre-cutting blades 30... 5. When the two pre-cutting blades 305 are in a parallel state, the distance between them is consistent with the diameter of the annular drill 204. The rear end of the pre-cutting blade 305 is brought into contact with the side of the sandwich insulation board away from the central support leg 102. The central transmission rod 301 and the transmission sleeve 201 are rotated again, so that the central transmission rod 301 rotates inside the hole and drives the two pre-cutting blades 305 to perform a rotational cutting operation on the front end face of the sandwich insulation board through the connecting column 310 and the connecting swing rod 304 to form a pre-cut groove. After the two pre-cutting blades 305 have finished cutting the surface of the sandwich insulation board, the central transmission rod 301 is axially pushed, so that the transmission sleeve 201 drives multiple alloy blades 206 to come into contact with the rear end face of the sandwich insulation board through the annular drill 204 and perform hole-making operation on the sandwich insulation board. As the transmission sleeve 201 continues to move forward along the axis of the central transmission rod 301, the annular drill 204 can completely penetrate the sandwich insulation board and cut the pre-cut groove. By performing the pre-cut groove operation before the annular drill 204 makes holes in the sandwich insulation board, the deformation of the sandwich insulation board surface caused by the annular drill 204 during the rotational cutting of the sandwich insulation board can be effectively reduced, the hole-making quality can be improved and the surface of the sandwich insulation board can be kept flat. After the hole is opened, the hole opening mechanism 2, the drilling transmission mechanism 3 and the central drilling mechanism 4 are separated from the sandwich insulation board. The adjusting screw 302 is rotated, so that the adjusting screw 302 drives the two ends of the feeding slide 303 to slide between the central transmission rod 301 and the transmission sleeve 201 under the guidance of the central transmission rod 301. In this way, the waste material formed by the hole in the transmission sleeve 201 can be quickly discharged through the feeding slide 303, keeping the inside of the transmission sleeve 201 clean.

[0025] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A hole-opening device for a cast-in-place concrete sandwich insulation system, comprising a hole-opening mechanism (2) and a drilling transmission mechanism (3), characterized in that: The drilling mechanism (2) is equipped with a drilling transmission mechanism (3) on its inner side. The drilling mechanism (2) includes a transmission sleeve (201). A ring drill (204) is installed at the front end of the transmission sleeve (201). Multiple weld filler pieces (205) are installed between the transmission sleeve (201) and the ring drill (204). Multiple alloy blades (206) are fixedly installed on the outer side of the front end of the ring drill (204). The drilling transmission mechanism (3) includes a central transmission rod (301), a feeding slide rod (303) is slidably connected to the inner side of the rear end of the central transmission rod (301), an adjusting screw (302) is installed in the middle of the feeding slide rod (303), positioning rings (306) are installed on both sides of the front end of the central transmission rod (301), a connecting swing rod (304) is rotatably connected to the inner side of the front end of the central transmission rod (301), a connecting column (310) is installed on the inner side of the two connecting swing rods (304) at their closest ends, a pre-cutting blade (305) is fixedly installed on the end of the two connecting swing rods (304) away from the connecting column (310), a movable push block (307) is installed between the two connecting swing rods (304), a second support spring (309) is provided on one side of the movable push block (307), and a second guide column (308) is installed on the inner side of the second support spring (309).

2. The hole-opening device for a cast-in-place concrete sandwich insulation system according to claim 1, characterized in that: The opening mechanism (2) also includes a connecting seat (202) fixedly connected to the rear end of the transmission sleeve (201). A transmission shaft (203) is fixedly installed in the middle of the connecting seat (202). The transmission sleeve (201), the connecting seat (202) and the transmission shaft (203) are coaxial.

3. The hole-opening device for a cast-in-place concrete sandwich insulation system according to claim 2, characterized in that: Multiple welding holes are provided between the transmission sleeve (201) and the annular drill (204), and multiple welding filler pieces (205) fill the inner side of the welding holes. The front end of the transmission sleeve (201) is fixedly connected to the annular drill (204) through multiple welding filler pieces (205). Multiple alloy blades (206) are arranged in a circle relative to the axis of the annular drill (204).

4. The hole-opening device for a cast-in-place concrete sandwich insulation system according to claim 3, characterized in that: A synchronous holding mechanism (1) is installed on the outside of the opening mechanism (2). The front end of the synchronous holding mechanism (1) is provided with a sandwich insulation plate. The synchronous holding mechanism (1) includes a sliding ring (103). The front end of the sliding ring (103) is slidably connected to a connecting ring (106). The outer side of the connecting ring (106) is rotatably connected to a plurality of central support legs (102). The rear end of the central support leg (102) is provided with a plurality of first guide posts (104). The outer side of the first guide post (104) is provided with a first support spring (105). The outer side of the plurality of first support springs (105) is provided with an installation collar (101).

5. The hole-opening device for a cast-in-place concrete sandwich insulation system according to claim 4, characterized in that: The front end of the drilling transmission mechanism (3) is equipped with a central drilling mechanism (4), which includes a central drill bit (401). Multiple threaded posts (403) are installed on the outer side of the rear end of the central drill bit (401). Limiting posts (402) are installed on the outer side of the threaded posts (403). The rear end of the central drill bit (401) is inserted into the inner side of the front end of the central transmission rod (301) and contacts the front end of the second guide post (308). The center drill bit (401) is installed by inserting multiple limiting posts (402) into the front end of the center drive rod (301). The threaded post (403) passes through the limiting post (402) and is connected to the center drive rod (301) by threads. The center drill bit (401) and the center drive rod (301) are fixedly connected by multiple limiting posts (402) and threaded posts (403). The multiple limiting posts (402) and threaded posts (403) are arranged in a circle relative to the axis of the center drill bit (401).

6. The hole-opening device for a cast-in-place concrete sandwich insulation system according to claim 5, characterized in that: The connecting ring (106) is slidably connected to the transmission sleeve (201). The front end of the mounting ring (101) is fixedly connected to the connecting ring (106). The front ends of the plurality of first guide posts (104) all pass through the mounting ring (101) and the plurality of first support springs (105) and are threadedly connected to the sliding ring (103). The mounting ring (101) and the sliding ring (103) are slidably connected through the plurality of first support springs (105). The front end of the sliding ring (103) passes through the connecting ring (106) and is in close contact with the rear end of the plurality of central support legs (102). The plurality of central support legs (102), the first guide posts (104) and the first support springs (105) are all arranged in a circle relative to the axis of the sliding ring (103).

7. The hole-opening device for a cast-in-place concrete sandwich insulation system according to claim 6, characterized in that: The rear end of the central transmission rod (301) is fixedly connected to the connecting seat (202). The front end of the adjusting screw (302) passes through the transmission shaft (203) and the unloading slide (303) in sequence and is rotatably connected to the central transmission rod (301). The adjusting screw (302) and the unloading slide (303) are connected by threads. The two ends of the unloading slide (303) pass through the central transmission rod (301) and are slidably connected to the inner wall of the transmission sleeve (201). The middle part of the unloading slide (303) slides linearly back and forth along the axis of the central transmission rod (301).

8. The hole-opening device for a cast-in-place concrete sandwich insulation system according to claim 7, characterized in that: The front end of the central transmission rod (301) is provided with a sliding groove. The movable push block (307), the second guide post (308), and the second support spring (309) are all located inside the sliding groove. The rear end of the second guide post (308) passes through the movable push block (307), the second support spring (309), and the sliding groove, and is connected to the central transmission rod (301) by a thread. The central transmission rod (301) and the movable push block (307) are connected by the second support spring (309). The movable push block (307) is slidably connected to the second guide post (308) and the central transmission rod (301).

9. A hole-opening device for a cast-in-place concrete sandwich insulation system according to claim 8, characterized in that: Both ends of the movable push block (307) are in contact with the ends of the two connecting swing rods (304). The central drive rod (301) and the two connecting swing rods (304) are rotatably connected by the connecting column (310). The two connecting swing rods (304) and the pre-cutting blades (305) are symmetrically installed relative to the central drive rod (301). The distance between the two pre-cutting blades (305) is consistent with the diameter of the annular drill (204).

10. The hole-opening device for a cast-in-place concrete sandwich insulation system according to claim 9, characterized in that: The two ends of the two connecting columns (310) pass through the central transmission rod (301) and the connecting swing rod (304) and are inserted into the inner sides of the two positioning rings (306). The front end of the central transmission rod (301) is fixedly connected to the two positioning rings (306), and the two positioning rings (306) are symmetrically installed relative to the central transmission rod (301).

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