Fabricated building lightweight energy-saving construction device and process

Abstract

The application discloses a kind of light-weight energy-saving construction device and process of fabricated building, it is related to the technical field of fabricated building construction, the device includes the sealing glue storage tube and joint backing pressure feed pipe sequentially arranged along joint direction, sealing glue storage tube is equipped with sealing glue extrusion mechanism, joint backing pressure feed pipe is equipped with joint backing pressure feed mechanism, gun body holding part is fixed on two tubes, trigger is set on gun body holding part and is connected with two mechanism transmission.The trigger is pulled, on the one hand, sealing glue is quantitatively extruded by push piece, push rod and sealing glue piston disc, on the other hand, sliding rod, sliding block and rack drive one-way transmission gear, drive lower roller one-way step rotation, cooperate with elastic compression wheel and quantitatively press into joint PE backing pipe, and by pressure joint roller compaction, the process includes loading, pre-extrusion, linkage construction and finishing steps, and backing filling and sealing glue application can be continuously completed by once holding and pushing, filling depth is uniform, and construction efficiency is high.

Description

Technical Field

[0001] This invention relates to the field of prefabricated building construction technology, specifically to a lightweight and energy-saving construction device and process for prefabricated buildings. Background Technology

[0002] Prefabricated buildings refer to a type of building where prefabricated components are manufactured in a factory and then transported to the construction site for assembly. During the construction of prefabricated buildings, splicing joints are formed between prefabricated exterior wall panels, prefabricated floor slabs, and other components. To ensure the building's waterproofing, thermal insulation, sound insulation, and airtightness, these joints need to be sealed.

[0003] Currently, joint sealing treatment usually adopts a process of backing filling combined with sealant caulking: first, PE backing rods or backing tubes are filled into the joint to control the caulking depth of the sealant and prevent the sealant from sticking to three sides. Then, sealant is applied to the outside of the backing material, and after curing, an elastic sealing layer is formed.

[0004] However, existing construction methods have the following shortcomings: Firstly, backing filling and sealant application are two separate processes, requiring the use of two sets of tools. Construction workers need to carry and frequently change multiple tools, making the process cumbersome and the construction efficiency low. Secondly, the backing material is usually inserted manually or pushed into the joint with the help of a simple pressure bar. The filling depth is difficult to control, and the backing material is prone to being filled too deeply, too shallowly, or partially detached, resulting in uneven thickness of the sealant layer, which affects the sealing quality and durability of the joint. Third, traditional construction tools such as glue guns have limited functions and often use bulky metal structures, resulting in a large overall weight. Construction workers experience high labor intensity when holding them for extended periods, which does not meet the lightweight and energy-saving construction requirements of prefabricated buildings.

[0005] Therefore, there is an urgent need for a lightweight and energy-saving construction device and process that can integrate joint backing delivery and sealant extrusion into one unit, which is easy to operate and provides stable filling quality. Summary of the Invention

[0006] The purpose of this invention is to solve the problems in the background art and provide a lightweight and energy-saving construction device and process for prefabricated buildings.

[0007] The above-mentioned technical objective of the present invention is achieved through the following technical solution: A lightweight and energy-saving construction device for prefabricated buildings includes a sealant storage tube, a sealant extrusion mechanism, a joint backing pressing mechanism, a joint backing pressing tube, a trigger, and a gun grip. The sealant storage tube and the joint backing pressing tube are arranged sequentially along the direction of the joint. The sealant extrusion mechanism is located inside the sealant storage tube and is used to extrude the sealant from the sealant storage tube. The joint backing pressing mechanism is located inside the joint backing pressing tube and is used to press the backing material into the joint. The gun grip is sleeved and fixed on the sealant storage tube and the joint backing pressing tube. The trigger is located on the gun grip and is drively connected to the sealant extrusion mechanism and the joint backing pressing mechanism.

[0008] Furthermore, the sealant storage tube, the seam backing pressure tube, and the gun body grip are all made of engineering plastic or aluminum alloy thin-walled structure to achieve lightweighting.

[0009] Furthermore, the sealant storage tube has a sealant discharge pipe at its outlet end, and the joint backing pressure delivery tube has a joint backing discharge pipe at its outlet end. The length of the sealant discharge pipe is shorter than the length of the joint backing discharge pipe. During construction, the device is pushed in a single direction. The joint backing discharge pipe, which is longer and located in front, first delivers the backing material to the depth of the joint. Then, the sealant discharge pipe, located behind, applies the sealant to the outside of the backing material. In one push, the process of first inserting the backing and then applying the sealant can be naturally achieved. The process sequence is less prone to errors, and the sealing construction quality is stable.

[0010] Furthermore, the seam backing pressing mechanism includes an elastic pressing wheel, a lower roller, a rack, a one-way transmission gear, a sliding block, and a sliding rod. The elastic pressing wheel and the lower roller are arranged sequentially from top to bottom inside the seam backing pressing tube. The elastic pressing wheel is rotatably arranged. The one-way transmission gear is located on the back of the lower roller and is rotatably arranged inside the seam backing pressing tube. The rack is located above the one-way transmission gear and meshes with the one-way transmission gear. The sliding block is fixedly connected to the rack, and the sliding rod is fixedly connected to the sliding block.

[0011] Furthermore, the one-way transmission gear includes a gear body, a one-way limiting disk, a one-way locking element, and a fixed shaft. The one-way limiting disk is rotatably disposed in the middle of the gear body, the fixed shaft is fixed in the middle of the one-way limiting disk, the lower roller is fixed at the end of the fixed shaft, the one-way locking element is arrayed on the outer ring of the one-way limiting disk, and the gear body is provided with one-way limiting teeth that cooperate with the one-way locking element.

[0012] Furthermore, the one-way locking member includes a hinge seat and a locking arm. One end of the locking arm is hinged to the hinge seat, and the other end is a one-way latching end. The one-way limiting tooth includes a locking support and a transition guide surface. The locking support is used to latch the one-way latching end, and the transition guide surface is used to guide the one-way latching end to slide to an adjacent one-way limiting tooth. The one-way limiting plate has an elastic element mounting cavity, and a reset elastic element is provided in the elastic element mounting cavity. One end of the reset elastic element abuts against the bottom of the elastic element mounting cavity, and the other end is connected to the locking arm. The side wall of the arm abuts against the unidirectional locking end, ensuring that the unidirectional locking end remains in unidirectional engagement with the unidirectional limiting tooth under the elastic force of the reset elastic element. One end of the locking arm of the unidirectional locking element is hinged, and the other end is the unidirectional locking end. This, combined with the locking bearing and transition guide surface of the unidirectional limiting tooth, reliably locks the unidirectional locking end in the feeding direction and smoothly passes over the adjacent unidirectional limiting tooth along the transition guide surface in the return direction. The reset elastic element ensures that the unidirectional locking end always maintains unidirectional engagement with the unidirectional limiting tooth, resulting in reliable unidirectional transmission engagement, smooth return, minimal wear on the locking end, and a long service life. Furthermore, a fixing plate is sleeved and fixed on the sliding rod, and the fixing plate is fixedly connected to the trigger, so that the pulling action of the trigger can be transmitted to the sliding rod and the rack synchronously and without backlash. The transmission synchronization is good, the connection is reliable, and the assembly and disassembly are convenient and easy to maintain.

[0013] Furthermore, the side of the joint backing discharge pipe is provided with a seam pressing roller. The seam pressing roller on the side of the joint backing discharge pipe can further roll the extruded PE backing pipe and push it into the depth of the joint gap to ensure that the backing is filled tightly and without voids, thereby further improving the joint sealing quality.

[0014] Furthermore, the sealant extrusion mechanism includes a push rod, a sealant piston disc, a push plate, a trigger reset elastic element, and a push rod release pressure plate. The push rod is slidably inserted longitudinally into the sealant storage tube. The sealant piston disc is located at the front end of the push rod and within the sealant storage tube. The upper end of the trigger is hinged to the push plate, which engages with the push rod in a one-way abutment. The trigger reset elastic element abuts between the trigger and the gun body grip to reset the push plate. The push rod release pressure plate is hinged to the gun body grip and engages with the push rod in a limiting fit. Pressing the push rod release pressure plate releases the limit on the push rod and pulls it back.

[0015] Preferably, the elastic clamping roller includes a clamping roller body, a clamping spring, a support column, and an adjusting column. The two support columns are fixed on the seam backing feeding pipe. The adjusting column is telescopically disposed inside the support columns. The clamping spring is disposed between the adjusting column and the support columns. The clamping roller body is rotatably disposed between the two adjusting columns. The elastic clamping roller applies a floating clamping force to the clamping roller body through the clamping spring and the telescopically disposed adjusting column. It can automatically adapt to backing materials of different diameters. The clamping force is automatically adjusted with the backing diameter, which ensures that the feeding does not slip and avoids crushing the backing material, making the feeding stable and reliable.

[0016] Furthermore, the joint backing pressing pipe has an inlet on its side wall, and a guide wheel and a guide tube are provided inside the joint backing pressing pipe. The guide wheel is located at the front end of the elastic pressing wheel and is rotatably connected to the side wall of the joint backing pressing pipe. The guide tube is located at the rear end of the elastic pressing wheel. The guide tube and the joint backing pressing pipe are fixedly connected. The inlet on the side wall of the joint backing pressing pipe facilitates the rapid insertion of the backing material. The guide wheel at the front end of the elastic pressing wheel and the guide tube at the rear end guide the backing material from both ends, so that the backing material can pass smoothly through the pipe and accurately enter the clamping position between the elastic pressing wheel and the lower roller. The feeding process does not deviate or jam, further improving the continuity and reliability of construction.

[0017] A lightweight and energy-saving construction process for prefabricated buildings, using the aforementioned lightweight and energy-saving construction device, includes the following steps: S1. Loading: Directly load the tubular sealant into the sealant storage tube; insert the PE backing tube through the inlet on the side wall of the joint backing pressure tube, guide it through the guide wheel, pass it between the elastic pressure wheel and the lower roller, and exit through the joint backing discharge tube. S2. Pre-extrusion: Pull the trigger several times in the waste glue area outside the joint. The trigger pushes the push rod and sealant piston plate forward through the push plate, pre-extruding the sealant so that the sealant fills the sealant discharge pipe and is continuously extruded from the pipe opening. During the pre-extrusion process, the end of the PE backing pipe that is sent out at the same time is directly inserted into the joint starting point, and the pipe opening of the joint backing discharge pipe is aligned with the joint starting point. S3. Linked Construction: Hold the gun body with one hand and push the construction device at a constant speed along the joint direction while repeatedly pulling the trigger. Each time the trigger is pulled, the sealant extrusion mechanism and the joint backing pressing mechanism move synchronously for a certain distance: on the one hand, the push plate pushes the push rod and sealant piston plate forward, extruding the sealant quantitatively from the sealant outlet pipe; on the other hand, the trigger drives the rack through the fixed plate, sliding rod, and sliding block, and the rack drives the one-way transmission gear to drive the lower roller to rotate in one direction, quantitatively pressing the PE backing tube clamped between the elastic pressing wheel and the lower roller into the joint, and the pressing roller rolls the delivered PE backing tube into the depth of the joint gap; since the sealant outlet pipe is located behind the joint backing outlet pipe and its length is shorter than the joint backing outlet pipe, the PE backing tube fills first during the device's push, and the sealant is then applied to the outside of the backing material, completing the backing filling and sealant caulking of the joint in one push. S4. Finishing: After pushing to the end of the joint, stop pulling the trigger, cut the PE backing tube, press the push rod to release the pressure plate to release the limit of the push rod and pull it back to stop the glue dispensing. Finally, scrape and trim the glue surface at both ends of the joint.

[0018] In summary, the beneficial effects of this invention are as follows: 1. This invention integrates the sealant extrusion mechanism and the joint backing pressure delivery mechanism into the same gun body. The sealant storage tube and the joint backing pressure delivery tube are arranged sequentially along the joint direction, and the two mechanisms are driven by the same trigger. Construction personnel can continuously complete the two processes of backing filling and sealant application by holding the gun and pulling the trigger with one hand. Compared with the traditional separate operation, it reduces the carrying and replacement of a set of tools, simplifies the construction process, and significantly improves the efficiency of joint sealing construction. At the same time, the sealant storage tube, the joint backing pressure delivery tube, and the gun body grip are made of engineering plastic or aluminum alloy thin-walled structure. The gun body grip is a hollow structure, making the whole machine lightweight and reducing the labor intensity of construction personnel for long-term hand operation, reflecting the requirements of lightweight construction. Quantitative step extrusion and pressure release cut-off avoid waste and leakage of adhesive, and one-time push molding avoids rework, achieving energy-saving construction from the aspects of material saving and labor saving.

[0019] 2. When the trigger of this invention is pulled, the trigger drives the rack to move linearly via the sliding rod and sliding block. The rack meshes with the one-way transmission gear to drive the lower roller to rotate in one direction, quantitatively and uniformly pressing the backing material held between the elastic pressing wheel and the lower roller into the joint. Each time the trigger is pulled, the backing material is advanced step by step, making the backing filling depth uniform and controllable. This avoids the problems of uneven filling depth and local voids caused by manual filling, and ensures the consistency of the sealant layer thickness.

[0020] 3. The one-way transmission gear of this invention adopts a combination structure of gear body, one-way limiting plate, one-way locking component and fixed shaft. The lower roller is connected to the one-way limiting plate via the fixed shaft. The one-way limiting teeth on the gear body cooperate with the one-way locking component, so that the gear body can only drive the one-way limiting plate and the lower roller to rotate synchronously in the feeding direction. When returning to the reverse position, the one-way limiting plate and the lower roller remain stationary, thereby effectively preventing the lower roller from reversing and returning, and avoiding the loosening and springback of the backing material that has been pressed into the seam. The structure is simple and the transmission is reliable.

[0021] 4. The sealant extrusion mechanism of the present invention uses the push plate at the upper end of the trigger to engage with the push rod in a one-way abutment. Pulling the trigger will drive the push rod and the sealant piston plate to move forward step by step, so as to realize the continuous quantitative extrusion of sealant, with uniform glue discharge and clean glue cutting; the trigger reset elastic element makes the trigger and push plate automatically reset after being released. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the prefabricated building lightweight energy-saving construction device of the present invention. Figure 2 This is a cross-sectional schematic diagram of the prefabricated building lightweight energy-saving construction device of the present invention; Figure 3 This is a cross-sectional view of the unidirectional transmission gear of the present invention; Figure 4 This is a schematic diagram of the cooperation between the unidirectional transmission gear and the lower roller of the present invention; Figure 5 This is a front view schematic diagram of the prefabricated building lightweight energy-saving construction device of the present invention; Figure 6 This is a rear view schematic diagram of the prefabricated building lightweight energy-saving construction device of the present invention; Figure 7 This is a schematic diagram of the grip part of the gun body of the present invention; Figure 8 This is a schematic diagram of the push rod releasing the pressure plate according to the present invention; Figure 9 This is a cross-sectional schematic diagram of the elastic clamping wheel; The diagram shows: 1. Sealant storage tube; 11. Sealant discharge tube; 2. Sealant extrusion mechanism; 21. Push rod; 22. Sealant piston disc; 23. Push plate; 24. Trigger reset elastic element; 25. Push rod release pressure plate; 3. Joint backing pressing mechanism; 31. Elastic pressure roller; 311. Pressure roller body; 312. Pressure spring; 313. Support column; 314. Adjusting column; 32. Lower roller; 33. Rack; 34. One-way transmission gear; 341. Gear body; 342. One-way limit disc; 3421. Elastic element mounting cavity. 3422. Reset elastic element; 343. One-way locking element; 3431. Hinge seat; 3432. Locking arm; 3433. One-way snap-fit ​​end; 344. Fixed shaft; 345. One-way limiting tooth; 3451. Locking bearing; 3452. Transition guide surface; 35. Sliding block; 36. Sliding rod; 361. Fixing plate; 4. Joint backing pressure feeding pipe; 41. Joint backing discharge pipe; 42. Pressing roller; 43. Inlet; 44. Guide wheel; 45. Guide tube; 5. Trigger; 6. Gun body grip; 100. PE backing tube. Detailed Implementation

[0023] The following specific embodiments are merely illustrative of the present invention and are not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to these embodiments without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present invention.

[0024] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] Example

[0026] according to Figures 1-2As shown, this embodiment provides a lightweight and energy-saving construction device for prefabricated buildings, including a sealant storage tube 1, a sealant extrusion mechanism 2, a joint backing pressing mechanism 3, a joint backing pressing tube 4, a trigger 5, and a gun grip 6. The sealant storage tube 1 and the joint backing pressing tube 4 are arranged sequentially along the joint direction, i.e., along the pushing direction of the device during construction, the joint backing pressing tube 4 is in front and the sealant storage tube 1 is behind, so that the backing material is first pressed into the joint, and the sealant is then applied to the outside of the backing material. The sealant extrusion mechanism 2 is located inside the sealant storage tube 1, and the joint backing pressing mechanism 3 is located inside the joint backing pressing tube 4. The gun grip 6 is sleeved and fixed on the sealant storage tube 1 and the joint backing pressing tube 4, forming a gun-shaped structure that can be held by a construction worker with one hand. The trigger 5 is located on the gun grip 6, and there is a gap on the gun grip 6 for installing the trigger 5, which is hinged to the gun grip 6. It is connected to the sealant extrusion mechanism 2 and the joint backing feeding mechanism 3. Pulling the trigger 5 can simultaneously drive the extrusion of sealant and the feeding of backing material. The PE backing tube 100 is flexible and can be coiled and hung on the wire reel at the construction site. During construction, it can be continuously pulled out from the inlet 43 to feed the material. The sealant storage tube 1 and the joint backing feeding tube 4 have two end caps and a cylindrical part in the middle. The cylindrical part of the sealant storage tube 1 can be removed to put in new sealant. The joint backing feeding tube 4 can be split in half to facilitate the installation of the PE backing tube 100. The gun body grip 6 is a hollow engineering plastic injection molded part. The sealant storage tube 1 and the joint backing feeding tube 4 are made of aluminum alloy thin-walled round tubes. The weight of the whole machine is significantly lower than the combination of traditional metal glue gun and caulking tool, which makes it convenient for construction workers to hold and operate for a long time with one hand.

[0027] according to Figures 1-2 As shown, the sealant storage tube 1 has a sealant discharge tube 11 at its outlet end, and the seam backing material feeding tube 4 has a seam backing material discharge tube 41 at its outlet end. The length of the sealant discharge tube 11 is shorter than the length of the seam backing material discharge tube 41. With this configuration, when the device is pushed along the seam, the longer seam backing material discharge tube 41 at the front first delivers the backing material to the depth of the seam, and the sealant discharge tube 11 at the rear then applies sealant to the outside of the already filled backing material. The entire process of first filling the backing material and then applying sealant can be completed in one push.

[0028] according to Figure 2As shown, the seam backing pressing mechanism 3 includes an elastic pressing wheel 31, a lower roller 32, a rack 33, a one-way transmission gear 34, a sliding block 35, and a sliding rod 36. The elastic pressing wheel 31 and the lower roller 32 are arranged sequentially from top to bottom inside the seam backing pressing tube 4. The backing material (PE backing tube 100 in this embodiment) passes between the elastic pressing wheel 31 and the lower roller 32 and is clamped by both. The elastic pressing wheel 31 is rotatably arranged, and the one-way transmission gear 34 is arranged on the back of the lower roller 32 and rotatably arranged inside the seam backing pressing tube 4. The rack 33 is located above the one-way transmission gear 34 and meshes with the one-way transmission gear 34. The sliding block 35 is fixedly connected to the rack 33, and the sliding rod 36 is fixedly connected to the sliding block 35. A fixing piece 361 is sleeved and fixed on the sliding rod 36, and the sliding rod 36 is fixedly connected to the trigger 5 through the fixing piece 361. When trigger 5 is pulled, trigger 5 moves sliding rod 36 and sliding block 35 via fixed plate 361. Sliding block 35 drives rack 33 to move linearly. Rack 33 drives one-way transmission gear 34 to rotate, which in turn drives lower roller 32 to rotate, pressing the backing material clamped between elastic clamping wheel 31 and lower roller 32 into the joint. The surfaces of elastic clamping wheel 31 and lower roller 32 are both covered with anti-slip and wear-resistant layers, which are rubber or polyurethane layers, to increase the clamping friction on PE backing tube 100.

[0029] according to Figures 3-4 As shown, the one-way transmission gear 34 includes a gear body 341, a one-way limiting disk 342, a one-way locking element 343, and a fixed shaft 344. The one-way limiting disk 342 is rotatably disposed in the middle of the gear body 341, the fixed shaft 344 is fixed in the middle of the one-way limiting disk 342, and the lower roller 32 is fixed at the end of the fixed shaft 344; the one-way locking element 343 is arranged in an array on the outer ring of the one-way limiting disk 342, and the gear body 341 is provided with one-way limiting teeth 345 that cooperate with the one-way locking element 343.

[0030] Specifically, the one-way locking member 343 includes a hinge seat 3431 and a locking arm 3432. One end of the locking arm 3432 is hinged to the hinge seat 3431, and the other end is a one-way engaging end 3433. The one-way limiting tooth 345 includes a locking support 3451 and a transition guide surface 3452. The locking support 3451 is used to engage the one-way engaging end 3433, and the transition guide surface 3452 is used to guide the one-way engaging end 3433 to slide to an adjacent position. One-way limiting tooth 345; One-way limiting plate 342 is provided with elastic element mounting cavity 3421, elastic element mounting cavity 3421 is provided with reset elastic element 3422, one end of reset elastic element 3422 abuts against the bottom of elastic element mounting cavity 3421, and the other end abuts against the side wall of locking arm 3432, so that the one-way locking end 3433 always maintains one-way engagement with one-way limiting tooth 345 under the elastic force of reset elastic element 3422.

[0031] The working principle of the aforementioned one-way transmission gear 34 is as follows: When the rack 33 drives the gear body 341 to rotate in the feeding direction, the one-way limiting tooth 345 on the gear body 341 locks the one-way locking end 3433 through the locking bearing 3451, driving the one-way limiting disk 342, the fixed shaft 344 and the lower roller 32 to rotate synchronously, realizing the step-by-step pressing of the backing material; when the rack 33 returns to its original position, the gear body 341 rotates in the opposite direction, and the one-way locking end 3433 slides along the transition guide surface 3452 and passes over the adjacent one-way limiting tooth 345. The one-way limiting disk 342 and the lower roller 32 remain stationary, thereby preventing the lower roller 32 from reversing and retracting, and avoiding the loosening and rebound of the backing material that has been pressed into the seam.

[0032] like Figure 2 As shown, the side of the seam backing discharge pipe 41 is provided with a seam pressing roller 42, which is used to further roll and push the extruded PE backing pipe 100 into the depth of the seam gap to ensure that the backing is tightly filled.

[0033] like Figure 2 As shown, the sealant extrusion mechanism 2 includes a push rod 21, a sealant piston disc 22, a push plate 23, a trigger reset elastic element 24, and a push rod release pressure plate 25. The push rod 21 is slidably inserted longitudinally into the sealant storage tube 1. The sealant piston disc 22 is located at the front end of the push rod 21 and inside the sealant storage tube 1. The upper end of the trigger 5 is hinged to the push plate 23, which engages with the push rod 21 in a one-way abutment. The trigger reset elastic element 24 abuts between the trigger 5 and the gun body grip 6, and is used to reset the trigger 5 and the push plate 23 after the trigger 5 is released. The push rod release pressure plate 25 is hinged to the gun body grip 6 and engages with the push rod 21 in a limiting fit. Pressing the push rod release pressure plate 25 can release the limit of the push rod 21 and pull it back to facilitate the replacement of sealant or the storage device. When trigger 5 is pulled, the pusher plate 23 at the upper end of trigger 5 pushes the push rod 21 forward, and the push rod 21 drives the sealant piston plate 22 to squeeze the sealant in the sealant storage tube 1, so that the sealant is squeezed out through the sealant discharge tube 11 and applied into the joint. After trigger 5 is released, the trigger reset elastic element 24 pushes the trigger 5 to reset, the pusher plate 23 retracts and abuts against the push rod 21 again in one direction. Repeated pulling can realize the continuous quantitative extrusion of sealant.

[0034] like Figure 9As shown, the elastic clamping roller 31 includes a clamping roller body 311, a clamping spring 312, support columns 313, and adjusting columns 314. Two support columns 313 are fixed to the seam backing feeding pipe 4. The adjusting column 314 is telescopically disposed within the support columns 313. The clamping spring 312 is disposed between the adjusting column 314 and the support columns 313. The clamping roller body 311 is rotatably disposed between the two adjusting columns 314. The elastic force of the clamping spring 312 is transmitted to the clamping roller body 311 via the adjusting column 314, causing the clamping roller body 311 to elastically press the backing material onto the lower roller 32. When the diameter of the backing material changes, the adjusting column 314 telescopically floats within the support columns 313, automatically adjusting the clamping force to ensure stable and reliable feeding.

[0035] like Figure 2 As shown, the side wall of the seam backing pressing pipe 4 has an inlet 43, through which the backing material passes into the seam backing pressing pipe 4. The seam backing pressing pipe 4 is equipped with a guide wheel 44 and a guide tube 45. The guide wheel 44 is located at the front end of the elastic pressing wheel 31 and is rotatably connected to the side wall of the seam backing pressing pipe 4. The guide tube 45 is located at the rear end of the elastic pressing wheel 31 and is fixedly connected to the seam backing pressing pipe 4. The guide wheel 44 and the guide tube 45 guide the backing material from both ends, allowing the backing material to pass smoothly through the seam backing pressing pipe 4 and accurately enter the clamping position between the elastic pressing wheel 31 and the lower roller 32.

[0036] A lightweight and energy-saving construction process for prefabricated buildings, using a lightweight and energy-saving construction device, includes the following steps: S1. Loading: The tubular sealant is directly loaded into the sealant storage tube 1; the PE backing tube 100 is inserted into the inlet 43 on the side wall of the joint backing pressure tube 4, guided by the guide wheel 44, passes between the elastic pressing wheel 31 and the lower roller 32, and exits from the joint backing discharge tube 41. S2, Pre-extrusion: Pull the trigger 5 several times in the waste glue area outside the joint. The trigger 5 pushes the push rod 21 and the sealant piston plate 22 forward through the push plate 23, pre-extruding the sealant so that the sealant fills the sealant discharge pipe 11 and is continuously extruded from the pipe opening. During the pre-extrusion process, the end of the PE backing pipe 100, which is sent out at the same time, is directly inserted into the joint starting point, and the pipe opening of the joint backing discharge pipe 41 is aligned with the joint starting point. S3. Linked Construction: Hold the gun body grip 6 with one hand, push the construction device at a uniform speed along the joint direction, and repeatedly pull the trigger 5; each time the trigger 5 is pulled, the sealant extrusion mechanism 2 and the joint backing pressing mechanism 3 move synchronously for a stroke: on the one hand, the pusher plate 23 pushes the push rod 21 and the sealant piston plate 22 forward, extruding the sealant from the sealant outlet pipe 11 in a quantitative manner; on the other hand, the trigger 5 drives the rack 33 to move through the fixed plate 361, sliding rod 36, and sliding block 35, and the rack 33 drives the one-way transmission gear 34. The lower roller 32 is driven to rotate in one direction, which quantitatively presses the PE backing tube 100, which is clamped between the elastic pressing roller 31 and the lower roller 32, into the joint. The pressing roller 42 rolls and pushes the PE backing tube 100 into the depth of the joint gap. Since the sealant outlet pipe 11 is located behind the joint backing outlet pipe 41 and its length is less than that of the joint backing outlet pipe 41, the PE backing tube 100 fills first and the sealant is then applied to the outside of the backing material during the device's push. The backing filling and sealant caulking of the joint are completed in one push. S4. Finishing: After pushing to the end of the joint, stop pulling the trigger 5, cut the PE backing tube 100, press the push rod to release the pressure plate 25 to release the limit of the push rod 21 and pull it back to stop the glue dispensing. Finally, scrape and trim the glue surface at both ends of the joint.

[0037] Before construction, masking tape can be pasted on both sides of the joint. After finishing and smoothing, the tape can be removed for a neater adhesive edge.

[0038] Working principle: According to Figures 1-9As shown, when using this device for sealing joints in prefabricated buildings, first, the tubular sealant is directly loaded into the sealant storage tube 1. Then, the PE backing tube 100 is inserted through the inlet 43 on the side wall of the joint backing pressure tube 4, guided by the guide wheel 44, and passes between the elastic pressure wheel 31 and the lower roller 32, and exits from the joint backing discharge tube 41. When using it for the first time, pull the trigger 5 several times in the waste glue area outside the joint to pre-extract the sealant, so that the sealant fills the sealant discharge tube 11 and is continuously extruded from the tube opening. During the pre-extraction process, the end of the PE backing tube 100, which is delivered synchronously, is directly inserted into the starting point of the joint, and then the joint backing discharge tube 41 is aligned with the joint. During construction, the worker holds the gun body grip 6 with one hand, pushes the device at a constant speed along the joint direction, and repeatedly pulls the trigger 5. Each time the trigger 5 is pulled, on the one hand, the push plate 23 at the upper end of the trigger 5 pushes the push rod 21 and the sealant piston plate 22 forward, extruding sealant from the sealant outlet pipe 11 in a measured amount. After releasing the trigger 5, the trigger reset elastic element 24 pushes the trigger 5 and the push plate 23 to automatically reset. On the other hand, the trigger 5 drives the rack 33 to move linearly through the fixed plate 361, the sliding rod 36, and the sliding block 35. The rack 33 drives the gear body 341 of the one-way transmission gear 34 to rotate. The one-way limiting tooth 345 on the gear body 341 is locked by the locking bearing 3451. The one-way locking end 3433 of the locking member 343 drives the one-way limiting plate 342, the fixed shaft 344 and the lower roller 32 to rotate synchronously, pressing the PE backing tube 100 clamped between the elastic pressing wheel 31 and the lower roller 32 into the joint a step. When the trigger 5 rack 33 is released to return to its original position, the one-way locking end 3433 slides along the transition guide surface 3452 past the adjacent one-way limiting tooth 345, and the one-way limiting plate 342 and the lower roller 32 remain stationary, thereby preventing the PE backing tube 100 from reversing, retracting and loosening. After the PE backing tube 100 exits the tube, it is further rolled and pushed into the depth of the joint gap by the pressing roller 42 on the side of the joint backing discharge pipe 41 to ensure that the backing is filled tightly. Because the sealant outlet pipe 11 is located behind the joint backing outlet pipe 41 and is relatively short, the backing material is filled first and the sealant is then applied during the device's advancement. The backing filling and sealant caulking of the joint can be completed in one operation. After advancing to the end of the joint, stop pulling the trigger 5, cut the PE backing pipe 100, press the push rod to release the pressure plate 25 to release the limit of the push rod 21, and pull it back to release the pressure and cut off the glue. The remaining glue is left in the pipe for later use. When replacing the sealant or the PE backing pipe 100, pull the push rod 21 back all the way to remove the old glue tube and replace it with a new one. The PE backing pipe 100 is then re-inserted through the inlet 43. The operation is convenient and quick.

Claims

1. A lightweight and energy-saving construction device for prefabricated buildings, characterized in that, The gun includes a sealant storage tube (1), a sealant extrusion mechanism (2), a seam backing pressing mechanism (3), a seam backing pressing tube (4), a trigger (5), and a gun body grip (6). The sealant storage tube (1) and the seam backing pressing tube (4) are arranged sequentially along the direction of the seam. The sealant extrusion mechanism (2) is located inside the sealant storage tube (1), and the seam backing pressing mechanism (3) is located inside the seam backing pressing tube (4). The gun body grip (6) is sleeved and fixed on the sealant storage tube (1) and the seam backing pressing tube (4). The trigger (5) is located on the gun body grip (6), and the trigger (5) is connected to the sealant extrusion mechanism (2) and the seam backing pressing mechanism (3) in a transmission connection.

2. The prefabricated building lightweight energy-saving construction device according to claim 1, characterized in that, The sealant storage tube (1) has a sealant discharge tube (11) at the discharge end, and the joint backing pressure tube (4) has a joint backing discharge tube (41) at the discharge end. The length of the sealant discharge tube (11) is less than the length of the joint backing discharge tube (41).

3. The lightweight and energy-saving construction device for prefabricated buildings according to claim 1, characterized in that, The seam backing pressing mechanism (3) includes an elastic pressing wheel (31), a lower roller (32), a rack (33), a one-way transmission gear (34), a sliding block (35), and a sliding rod (36). The elastic pressing wheel (31) and the lower roller (32) are arranged sequentially from top to bottom in the seam backing pressing tube (4). The elastic pressing wheel (31) is rotatably arranged. The one-way transmission gear (34) is located on the back of the lower roller (32) and is rotatably arranged in the seam backing pressing tube (4). The rack (33) is located above the one-way transmission gear (34) and meshes with the one-way transmission gear (34). The sliding block (35) is fixedly connected to the rack (33). The sliding rod (36) is fixedly connected to the sliding block (35).

4. The lightweight and energy-saving construction device for prefabricated buildings according to claim 3, characterized in that, The one-way transmission gear (34) includes a gear body (341), a one-way limiting disk (342), a one-way locking element (343), and a fixed shaft (344). The one-way limiting disk (342) is rotatably disposed in the middle of the gear body (341). The fixed shaft (344) is fixed in the middle of the one-way limiting disk (342). The lower roller (32) is fixed at the end of the fixed shaft (344). The one-way locking element (343) is arranged in an array on the outer ring of the one-way limiting disk (342). The gear body (341) is provided with one-way limiting teeth (345) that cooperate with the one-way locking element (343).

5. The prefabricated building lightweight energy-saving construction device according to claim 4, characterized in that, The one-way locking member (343) includes a hinge seat (3431) and a locking arm (3432). One end of the locking arm (3432) is hinged to the hinge seat (3431), and the other end is a one-way locking end (3433). The one-way limiting tooth (345) includes a locking support (3451) and a transition guide surface (3452). The locking support (3451) is used to lock the one-way locking end (3433), and the transition guide surface (3452) is used to lock the one-way locking end (3433). 3452) is used to guide the one-way snap-fit ​​end (3433) to slide to the adjacent one-way limiting tooth (345); the one-way limiting plate (342) is provided with an elastic element mounting cavity (3421), and a reset elastic element (3422) is provided in the elastic element mounting cavity (3421). One end of the reset elastic element (3422) abuts against the bottom of the elastic element mounting cavity (3421), and the other end abuts against the side wall of the locking arm (3432).

6. The lightweight and energy-saving construction device for prefabricated buildings according to claim 5, characterized in that, A fixing plate (361) is sleeved and fixed on the sliding rod (36), and the fixing plate (361) is fixedly connected to the trigger (5).

7. The lightweight and energy-saving construction device for prefabricated buildings according to claim 3, characterized in that, The side of the seam backing discharge pipe (41) is provided with a seam pressing roller (42), and the side wall of the seam backing pressing pipe (4) is provided with an inlet (43). The seam backing pressing pipe (4) is provided with a guide wheel (44) and a guide tube (45). The guide wheel (44) is located at the front end of the elastic pressing wheel (31) and is rotatably connected to the side wall of the seam backing pressing pipe (4). The guide tube (45) is located at the rear end of the elastic pressing wheel (31). The guide tube (45) and the seam backing pressing pipe (4) are fixedly connected.

8. The prefabricated building lightweight energy-saving construction device according to claim 1, characterized in that, The sealant extrusion mechanism (2) includes a push rod (21), a sealant piston disc (22), a push plate (23), a trigger reset elastic element (24), and a push rod release pressure plate (25). The push rod (21) is slidably inserted longitudinally into the sealant storage tube (1). The sealant piston disc (22) is located at the front end of the push rod (21) and inside the sealant storage tube (1). The upper end of the trigger (5) is hinged to the push plate. (23) The push plate (23) and the push rod (21) are in one-way contact. The trigger reset elastic element (24) abuts between the trigger (5) and the gun body grip (6) to reset the push plate (23). The push rod release pressure plate (25) is hinged to the gun body grip (6) and is in a limiting cooperation with the push rod (21). Pressing the push rod release pressure plate (25) can release the limit of the push rod (21) and pull it back.

9. The lightweight and energy-saving construction device for prefabricated buildings according to claim 3, characterized in that, The elastic clamping wheel (31) includes a clamping wheel body (311), a clamping spring (312), a support column (313), and an adjusting column (314). The two support columns (313) are fixed on the joint backing pressure pipe (4). The adjusting column (314) is telescopically arranged inside the support column (313). The clamping spring (312) is arranged between the adjusting column (314) and the support column (313). The clamping wheel body (311) is rotatably arranged between the two adjusting columns (314).

10. A lightweight and energy-saving construction process for prefabricated buildings, characterized in that, Construction using the prefabricated building lightweight energy-saving construction device according to any one of claims 1 to 9 includes the following steps: S1. Loading: The tubular sealant is directly loaded into the sealant storage tube (1); the PE backing tube (100) is inserted through the inlet (43) on the side wall of the joint backing pressure tube (4), guided by the guide wheel (44) and passed between the elastic pressing wheel (31) and the lower roller (32), and then exited through the joint backing discharge tube (41); S2, Pre-extrusion: Pull the trigger (5) several times in the waste glue area outside the joint. The trigger (5) pushes the push rod (21) and the sealant piston plate (22) forward through the push plate (23) to pre-extrude the sealant, so that the sealant fills the sealant discharge pipe (11) and is continuously extruded from the pipe opening. During the pre-extrusion process, the end of the PE backing pipe (100) sent out at the same time is directly inserted into the joint starting point, and the pipe opening of the joint backing discharge pipe (41) is aligned with the joint starting point. S3, Joint Construction: Hold the gun body grip (6) with one hand, push the construction device at a constant speed along the joint direction and repeatedly pull the trigger (5); each time the trigger (5) is pulled, the sealant extrusion mechanism (2) and the joint backing pressing mechanism (3) move synchronously for a period of time: on the one hand, the push plate (23) pushes the push rod (21) and the sealant piston plate (22) forward, and extrudes the sealant quantitatively from the sealant outlet pipe (11); on the other hand, the trigger (5) drives the rack (33) to move through the fixed plate (361), the sliding rod (36), and the sliding block (35), and the rack (33) drives the unidirectional transmission. The gear (34) drives the lower roller (32) to rotate in one direction, which quantitatively presses the PE backing tube (100) held between the elastic pressing wheel (31) and the lower roller (32) into the joint. The pressing roller (42) rolls and pushes the PE backing tube (100) into the depth of the joint gap. Since the sealant outlet pipe (11) is located behind the joint backing outlet pipe (41) and its length is less than that of the joint backing outlet pipe (41), the PE backing tube (100) fills first and the sealant is then applied to the outside of the backing material during the device push. The backing filling and sealant filling of the joint are completed in one push. S4. Finishing: After pushing to the end of the joint, stop pulling the trigger (5), cut the PE backing tube (100), press the push rod to release the pressure plate (25) to release the limit of the push rod (21) and pull it back to stop the glue from being dispensed. Finally, scrape and trim the glue surface at both ends of the joint.

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