Automatic waterproofing membrane welding device

Abstract

The utility model discloses a waterproof roll material automatic welding device, including lower frame subassembly, upper frame subassembly, heating assembly, press down and heating control subassembly, roll material spacing subassembly and drive assembly. Upper frame subassembly sets up above lower frame subassembly, realizes up and down movement through drive assembly, heating assembly is located between upper and lower frame, is used for heating waterproof roll material, and roll material spacing subassembly adjusts the welding margin, and press down and heating control subassembly controls heating and compaction action in coordination. The utility model discloses through the integration of each functional component, has realized the automatic positioning, heating, compaction and welding of waterproof roll material, has improved construction efficiency and welding accuracy significantly, and has strong adaptability simultaneously, is applicable to the welding demand of multiple specifications waterproof roll material.

Description

Technical Field

[0001] This utility model relates to the field of waterproof construction equipment technology, and in particular to an automatic welding device for waterproof membrane. Background Technology

[0002] In the fields of building engineering and infrastructure construction, welding of waterproof membranes is a crucial step in ensuring the sealing and durability of the waterproof layer. Traditional waterproof membrane welding typically relies on manual operation or semi-automatic equipment, which suffers from low efficiency, inconsistent weld quality, and high labor intensity. Especially in large-area construction scenarios, manual welding struggles to guarantee consistent weld edge distances and uniform weld surfaces, easily leading to welding defects and affecting the overall waterproofing effect. Furthermore, existing semi-automatic welding equipment is often complex in structure, cumbersome to operate, and requires highly skilled operators, further limiting its widespread application in practical projects. In addition, existing equipment lacks precise positioning and heating control of the membrane during welding, potentially resulting in excessively high or low welding temperatures, thus affecting weld quality. Therefore, developing a waterproof membrane welding device capable of automated operation, precise positioning, stable heating, and efficient welding has become a pressing technical challenge. This utility model aims to provide an automatic waterproof membrane welding device to overcome the shortcomings of existing technologies, improve welding efficiency and quality, reduce the need for manual intervention, and meet the requirements of modern construction. Utility Model Content

[0003] This utility model addresses the problems of low automation, poor welding accuracy, complex operation, and limited applicability of existing waterproof membrane welding devices. Therefore, this utility model adopts the following technical solution:

[0004] This utility model provides an automatic welding device for waterproof membrane, including a lower frame assembly, an upper frame assembly, a heating assembly, a pressing and heating control assembly, a membrane limiting assembly, and a drive assembly. The lower frame assembly supports the entire device and provides mobility; the upper frame assembly is positioned above the lower frame assembly and moves vertically via the drive assembly; the heating assembly is located between the upper and lower frame assemblies and is used to heat the waterproof membrane; the pressing and heating control assembly is connected to the upper frame assembly and controls the position of the heating assembly and the movement of the upper frame assembly; the membrane limiting assembly is located on one side of the lower frame assembly and is used to adjust and fix the welding edge distance of the waterproof membrane.

[0005] Furthermore, the lower frame assembly includes a lower frame, front traveling wheels, rear traveling wheels, and a passive waterproof membrane pressure roller. The front traveling wheels and rear traveling wheels are respectively installed at the front and rear ends of the lower frame for overall movement of the device; the passive waterproof membrane pressure roller is located on one side of the upper end of the lower frame for cooperating with the active waterproof membrane pressure roller to clamp the waterproof membrane; the membrane limiting assembly is located on one side of the middle of the lower frame, near one end of the passive waterproof membrane pressure roller.

[0006] Specifically, the membrane limiting assembly includes a waterproof membrane limiting plate, a limiting plate adjustment scale, and a limiting plate adjustment fixing slider. The waterproof membrane limiting plate is located on one side of the middle of the lower frame, and its lower end is fixedly connected to the limiting plate adjustment fixing slider; the limiting plate adjustment fixing slider is slidably connected to the lower frame for adjusting the welding edge distance of the waterproof membrane; the limiting plate adjustment scale is fixed on the lower frame and positioned near the limiting plate adjustment fixing slider to provide a reference for adjusting the welding edge distance.

[0007] Furthermore, the drive assembly includes an upper frame, a drive motor, and a worm gear drive mechanism. The lower end of the upper frame is fixedly connected to the upper end of the lower frame; the drive motor is fixed to the upper end of the upper frame and provides power; the worm gear drive mechanism is disposed within the upper frame, its input end is connected to the drive end of the drive motor, and its output end is simultaneously connected to the drive end of the upper frame assembly and the drive end of the passive waterproof membrane pressure roller.

[0008] The upper frame assembly includes a movable frame and an active waterproof membrane pressure roller. The active waterproof membrane pressure roller is rotatably connected to the movable frame; one end of the movable frame is rotatably connected to the upper frame, and its drive end is drively connected to the drive output end of the worm gear drive mechanism; the active waterproof membrane pressure roller is located above the passive waterproof membrane pressure roller, and the heating component is disposed between the two for clamping and heating the waterproof membrane; the upper end of the movable frame is connected to the drive end of the pressing and heating control component.

[0009] Furthermore, the heating assembly includes a waterproof membrane heat-sealing heating plate and a heating plate fixing slider. The waterproof membrane heat-sealing heating plate is located between the passive waterproof membrane pressure roller and the active waterproof membrane pressure roller, with one end fixedly connected to the heating plate fixing slider; the heating plate fixing slider is slidably connected to the pressing and heating control assembly for adjusting the position of the heating plate.

[0010] Specifically, the pressing and heating control assembly includes a control mechanism frame, a frame pressing drive shaft, a control handle, a heating plate adjusting lever, a frame pressing push rod, a connecting rod driving block, and a heating plate driving connecting rod. The control mechanism frame is fixedly connected to the upper frame; one end of the frame pressing drive shaft passes through the control mechanism frame and is fixedly connected to the control handle, and the other end is fixedly connected to the frame pressing push rod; the other end of the frame pressing push rod contacts the upper end of the movable frame, for driving the movable frame to press down; one end of the heating plate adjusting lever is fixedly connected to the frame pressing drive shaft, and the other end is fixedly connected to the connecting rod driving block; one end of the heating plate driving connecting rod is provided with a sliding groove, the connecting rod driving block is slidably connected to the sliding groove of the heating plate driving connecting rod, and the other end is fixedly connected to the heating plate fixed slider, for adjusting the position of the heating plate.

[0011] Furthermore, the technical solution of this utility model achieves automatic welding of waterproof membrane through the following steps:

[0012] S1: Place the waterproof membrane to be welded on the lower frame, and position one edge of it on the passive waterproof membrane pressure roller;

[0013] S2: Loosen the limiting plate adjustment and fixing slider, adjust the position of the waterproof membrane limiting plate so that the welding edge distance of the waterproof membrane meets the requirements, and then tighten the limiting plate adjustment and fixing slider.

[0014] S3: Insert another sheet of waterproof membrane to be welded into the gap between the movable frame and the lower frame, overlapping with the first sheet of waterproof membrane;

[0015] S4: The heating plate for heat sealing of waterproof membrane is powered on and heated. Operate the control handle to make the frame press down drive shaft and the heating plate adjustment lever rotate.

[0016] S5: The frame pressing push rod pushes the movable frame down, so that the active waterproof membrane pressure roller and the passive waterproof membrane pressure roller clamp the waterproof membrane; the heating plate adjusting lever pulls the heating plate driving lever through the connecting rod driving block, so that the waterproof membrane heat sealing heating plate comes into contact with the waterproof membrane and heats and melts it.

[0017] S6: The drive motor drives the active waterproof membrane pressure roller and the passive waterproof membrane pressure roller to rotate through the worm gear drive mechanism, pressing and welding the molten waterproof membrane;

[0018] S7: The device moves on the ground via its front and rear wheels, enabling a continuous automatic welding process.

[0019] The beneficial effects of this utility model are:

[0020] By integrating a lower frame assembly, an upper frame assembly, a heating assembly, a pressing and heating control assembly, a membrane limiting assembly, and a drive assembly, this invention achieves automatic positioning, heating, pressing, and welding of waterproof membranes, significantly improving construction efficiency. The membrane limiting assembly, through a limiting plate adjusting the sliding connection between the fixed slider and the lower frame, combined with the limiting plate's adjusting scale, allows for precise adjustment of the welding edge distance of the waterproof membrane, ensuring accurate welding positioning. The pressing and heating control assembly, through the coordinated action of the control handle, the frame pressing drive shaft, and the heating plate adjusting lever, enables the pressing of the movable frame and the adjustment of the heating plate position, simplifying the operation process. Furthermore, this invention is applicable to welding various specifications of waterproof membranes, demonstrating strong adaptability.

[0021] In summary, this utility model provides an efficient and precise automatic welding device for waterproof membranes through a clear technical structure and specific operating steps, solving the problems existing in the prior art and possessing significant application value and market prospects. Attached Figure Description

[0022] Figure 1 This is an exploded structural diagram of the present invention. Figure 1 ;

[0023] Figure 2 This is a utility model Figure 1 Enlarged view of part A in the middle;

[0024] Figure 3 This is an exploded structural diagram of the present invention. Figure 2 ;

[0025] Figure 4 This is an exploded structural diagram of the present invention. Figure 3 ;

[0026] Figure 5 This is a schematic diagram of the overall external structure of this utility model. Figure 1 ;

[0027] Figure 6 This is a schematic diagram of the overall external structure of this utility model. Figure 2 ;

[0028] Figure 7 This is a schematic diagram of the overall external structure of this utility model. Figure 3 ;

[0029] The attached figures are labeled as follows:

[0030] 1. Lower frame; 2. Front traveling wheel; 3. Rear traveling wheel; 4. Passive waterproof membrane pressure roller; 5. Waterproof membrane limit plate; 6. Limit plate adjustment scale; 7. Limit plate adjustment fixing slider; 8. Waterproof membrane heat sealing heating plate; 9. Upper frame; 10. Drive motor; 11. Worm gear drive mechanism; 12. Movable frame; 13. Active waterproof membrane pressure roller; 14. Control mechanism frame; 15. Frame lowering drive shaft; 16. Control handle; 17. Heating plate adjustment lever; 18. Frame lowering push rod; 19. Linkage drive lever; 20. Heating plate drive link; 21. Heating plate fixing slider. Detailed Implementation

[0031] This utility model provides an automatic welding device for waterproof membrane rolls. Its structure mainly includes a lower frame assembly, an upper frame assembly, a heating assembly, a pressing and heating control assembly, a membrane roll limiting assembly, and a drive assembly. These components, through reasonable layout and synergistic action, achieve automated welding of waterproof membrane rolls. The following description, in conjunction with the appendix... Figure 1 To be continued Figure 7 The specific embodiments of this utility model will be described in detail.

[0032] like Figure 1 As shown, the lower frame assembly is the foundation of the entire device, comprising the lower frame 1, front traveling wheels 2, rear traveling wheels 3, and a passive waterproof membrane pressure roller 4. The lower frame 1 is made of metal and possesses sufficient strength to support the entire device. The front traveling wheels 2 and rear traveling wheels 3 are respectively installed at the front and rear ends of the lower frame 1, serving as the main components for device movement. They are connected to the lower frame 1 via bearings, ensuring smooth sliding of the device on the ground. The passive waterproof membrane pressure roller 4 is located on one side of the upper end of the lower frame 1 and works in conjunction with the active waterproof membrane pressure roller 13 to clamp and press the waterproof membrane to be welded. The passive waterproof membrane pressure roller 4 is rotatably connected to the lower frame 1 via a shaft, allowing for flexible rotation and reducing frictional damage to the membrane surface.

[0033] The membrane limiting assembly is located on one side of the middle of the lower frame 1, near one end of the passive waterproof membrane pressure roller 4. Its main function is to precisely adjust the welding edge distance of the waterproof membrane. The membrane limiting assembly includes a waterproof membrane limiting plate 5, a limiting plate adjustment scale 6, and a limiting plate adjustment fixing slider 7. The waterproof membrane limiting plate 5 is a long strip of metal plate, the lower end of which is fixedly connected to the limiting plate adjustment fixing slider 7. The limiting plate adjustment fixing slider 7 is connected to the lower frame 1 by a sliding groove structure, allowing the operator to adjust the position of the waterproof membrane limiting plate 5 by loosening or locking the slider. The limiting plate adjustment scale 6 is fixed on the lower frame 1 and adjacent to the position of the limiting plate adjustment fixing slider 7, providing a direct reference for adjusting the waterproof membrane limiting plate 5. In this way, the operator can adjust the welding edge distance of the waterproof membrane to the ideal position, thereby improving welding accuracy.

[0034] The drive assembly is one of the core components for achieving automated operation of the device. It includes an upper frame 9, a drive motor 10, and a worm gear drive mechanism 11. The lower end of the upper frame 9 is bolted to the upper end of the lower frame 1, forming a single integrated structure. The drive motor 10 is fixedly mounted on the upper end of the upper frame 9, and its output shaft is connected to the input end of the worm gear drive mechanism 11 via a coupling. The worm gear drive mechanism 11 is located inside the upper frame 9 and has a speed reduction and torque amplification function, enabling efficient transmission of the power from the drive motor 10 to the active waterproof membrane pressure roller 13 and the passive waterproof membrane pressure roller 4. The output end of the worm gear drive mechanism 11 is connected to the drive ends of the active waterproof membrane pressure roller 13 and the passive waterproof membrane pressure roller 4 via gear transmission, thereby achieving synchronous rotation of both. This design not only improves power transmission efficiency but also ensures uniform stress on the waterproof membrane during welding.

[0035] The upper frame assembly is the key part of the device for performing welding operations, and it includes a movable frame 12 and an active waterproof membrane pressure roller 13. The movable frame 12 is rotatably connected to one end of the upper frame 9 via a rotating shaft, allowing it to swing up and down within a certain range. The active waterproof membrane pressure roller 13 is rotatably connected to the movable frame 12 via bearings, and its position corresponds to the passive waterproof membrane pressure roller 4, with an appropriate gap between them to accommodate the waterproof membrane and the heating components. The drive end of the active waterproof membrane pressure roller 13 is connected to the output end of the worm gear drive mechanism 11 via gear transmission, and it rotates under the action of the drive motor 10. The upper end of the movable frame 12 is connected to the drive end of the lower pressure and heating control component, and its up and down movement is achieved by the action of the lower pressure and heating control component. This design allows the active waterproof membrane pressure roller 13 and the passive waterproof membrane pressure roller 4 to make close contact with the waterproof membrane, thereby completing the welding process.

[0036] The heating assembly is a crucial component for achieving hot-melt welding of waterproof membrane rolls. It includes a waterproof membrane heat-sealing heating plate 8 and a heating plate fixing slider 21. The waterproof membrane heat-sealing heating plate 8 is a long strip of metal plate with embedded heating wires, which can rapidly heat up to the set temperature after being energized. One end of the waterproof membrane heat-sealing heating plate 8 is fixedly connected to the heating plate fixing slider 21, which is slidably connected to the heating control assembly via a sliding groove and downward pressure. This connection method allows the position of the waterproof membrane heat-sealing heating plate 8 to be flexibly adjusted according to actual needs, thus better adapting to waterproof membranes of different thicknesses. The waterproof membrane heat-sealing heating plate 8 is located between the passive waterproof membrane pressure roller 4 and the active waterproof membrane pressure roller 13. When the device is running, the heating plate directly contacts the welding area of ​​the waterproof membrane, heating its surface material to a molten state, preparing for subsequent pressing and welding.

[0037] The pressing and heating control assembly is the core component for achieving precise control of the device. It includes a control mechanism frame 14, a frame pressing drive shaft 15, a control handle 16, a heating plate adjustment lever 17, a frame pressing push rod 18, a linkage drive lever 19, and a heating plate drive linkage 20. The control mechanism frame 14 is fixedly connected to the upper frame 9 by bolts, providing a stable mounting base for other components. One end of the frame pressing drive shaft 15 passes through the control mechanism frame 14 and is fixedly connected to the control handle 16, while the other end is fixedly connected to the frame pressing push rod 18. The other end of the frame pressing push rod 18 contacts the upper end of the movable frame 12. When the operator rotates the control handle 16, the frame pressing drive shaft 15 rotates accordingly, driving the frame pressing push rod 18 to push the movable frame 12 downward, thereby clamping the waterproof membrane with the active waterproof membrane pressure roller 13 and the passive waterproof membrane pressure roller 4. One end of the heating plate adjusting lever 17 is fixedly connected to the frame pressing drive shaft 15, and the other end is fixedly connected to the connecting rod driving block 19. The connecting rod driving block 19 is slidably connected to the slide groove of the heating plate driving connecting rod 20, and the other end of the heating plate driving connecting rod 20 is fixedly connected to the heating plate fixed slider 21. When the frame pressing drive shaft 15 rotates, the heating plate adjusting lever 17 pulls the heating plate driving connecting rod 20 to move through the connecting rod driving block 19, thereby causing the waterproof membrane heat sealing heating plate 8 to contact the waterproof membrane and heat and melt it.

[0038] The working principle of this utility model is as follows: First, place the waterproof membrane to be welded on the lower frame 1, ensuring one edge is positioned on the passive waterproof membrane pressure roller 4. Loosen the limiting plate adjustment fixing slider 7, and adjust the position of the waterproof membrane limiting plate 5 according to the reference value of the limiting plate adjustment scale 6, so that the welding edge distance of the waterproof membrane meets the requirements. Then, lock the limiting plate adjustment fixing slider 7. Next, insert another waterproof membrane to be welded through the gap between the movable frame 12 and the lower frame 1, overlapping with the first waterproof membrane. After the power is turned on, the waterproof membrane heat-sealing heating plate 8 begins to heat. The operator rotates the control handle 16, and the frame pressing drive shaft 15 and the heating plate adjustment lever 17 rotate accordingly. The frame pressing push rod 18 pushes the movable frame 12 downward, causing the active waterproof membrane pressure roller 13 and the passive waterproof membrane pressure roller 4 to clamp the waterproof membrane. Simultaneously, the heating plate adjustment lever 17, via the connecting rod drive block 19, pulls the heating plate drive connecting rod 20 to move, causing the waterproof membrane heat-sealing heating plate 8 to contact and heat the waterproof membrane to melt. The drive motor 10, via the worm gear drive mechanism 11, drives the active waterproof membrane pressure roller 13 and the passive waterproof membrane pressure roller 4 to rotate, pressing and welding the melted waterproof membrane. As the active waterproof membrane pressure roller 13 and the passive waterproof membrane pressure roller 4 continue to rotate, the device moves smoothly on the ground via the front walking wheel 2 and the rear walking wheel 3, thereby realizing a continuous automatic welding process.

[0039] When applying this invention at the construction site, operators only need to follow the above steps to complete the welding of the waterproof membrane. For example, in roof waterproofing construction, the operator aligns the edges of two waterproof membrane sheets and places them into the device. By adjusting the membrane limiting components, the welding edge distance is ensured to be consistent, and then the device is started for welding. Because the device has an automatic walking function, operators do not need to manually drag the equipment, greatly reducing labor intensity. Furthermore, the device's heating components can quickly heat up and maintain a constant temperature, ensuring stable and reliable welding quality. The design of the pressing and heating control components makes operation more convenient; the pressing and heating actions can be coordinated and controlled simply by using the control handle 16, significantly improving work efficiency.

[0040] In summary, this invention integrates a lower frame assembly, an upper frame assembly, a heating assembly, a pressing and heating control assembly, a roll material limiting assembly, and a drive assembly, achieving automatic positioning, heating, pressing, and welding functions for waterproof roll materials. The device has a compact and reasonable structure, is easy to operate, and is suitable for welding various specifications of waterproof roll materials, demonstrating strong adaptability and practicality.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An automatic welding device for waterproof membrane, characterized in that: The device includes a lower frame assembly, an upper frame assembly, a heating assembly, a pressing and heating control assembly, a roll material limiting assembly, and a drive assembly. The upper frame assembly is positioned above the lower frame assembly, and the drive end of the upper frame assembly is connected to the drive end of the drive assembly. The drive assembly is fixedly positioned on the upper end of the lower frame assembly. The heating assembly is positioned between the upper frame assembly and the lower frame assembly, and the connection point for clamping the waterproof roll material is located between the upper frame assembly and the lower frame assembly. The pressing and heating control assembly is connected to the upper frame assembly, and its control end is connected to both the heating assembly and the upper frame assembly. The roll material limiting assembly is positioned on one side of the lower frame assembly.

2. The automatic welding device for waterproof membrane according to claim 1, characterized in that: The lower frame assembly includes a lower frame (1), a front traveling wheel (2), a rear traveling wheel (3), and a passive waterproof membrane pressure roller (4). The front traveling wheel (2) and the rear traveling wheel (3) are respectively located at the front and rear ends of the lower frame (1). The passive waterproof membrane pressure roller (4) is located on one side of the upper end of the lower frame (1). The other side of the upper end of the lower frame (1) is connected to the drive assembly. The membrane limiting assembly is located on one side of the middle part of the lower frame (1) and close to one end of the passive waterproof membrane pressure roller (4). The upper frame assembly is located above the passive waterproof membrane pressure roller (4).

3. The automatic welding device for waterproof membrane according to claim 2, characterized in that: The roll material limiting assembly includes a waterproof roll material limiting plate (5), a limiting plate adjusting scale (6), and a limiting plate adjusting and fixing slider (7). The waterproof roll material limiting plate (5) is located on one side of the middle part of the lower frame (1). The lower end of the waterproof roll material limiting plate (5) is fixedly connected to the limiting plate adjusting and fixing slider (7). The limiting plate adjusting and fixing slider (7) is slidably connected to the lower frame (1). The limiting plate adjusting scale (6) is fixedly connected to the lower frame (1) and is positioned close to the limiting plate adjusting and fixing slider (7).

4. The automatic welding device for waterproof membrane according to claim 2, characterized in that: The drive assembly includes an upper frame (9), a drive motor (10), and a worm gear drive mechanism (11). The lower end of the upper frame (9) is fixedly connected to the upper end of the lower frame (1). The drive motor (10) is fixedly connected to the upper end of the upper frame (9). The worm gear drive mechanism (11) is located inside the upper frame (9). The drive end of the drive motor (10) is connected to the worm gear drive mechanism (11). The drive output end of the worm gear drive mechanism (11) is simultaneously connected to the drive end of the upper frame assembly and the drive end of the passive waterproof membrane pressure roller (4).

5. The automatic welding device for waterproof membrane according to claim 4, characterized in that: The upper frame assembly includes a movable frame (12) and an active waterproof membrane pressure roller (13). The active waterproof membrane pressure roller (13) is rotatably connected to the movable frame (12). The movable frame (12) is rotatably connected to one end of the upper frame (9). The driving end of the active waterproof membrane pressure roller (13) is connected to the driving output end of the worm gear drive mechanism (11). The active waterproof membrane pressure roller (13) is located above the passive waterproof membrane pressure roller (4). The heating component is arranged between the active waterproof membrane pressure roller (13) and the passive waterproof membrane pressure roller (4). The upper end of the movable frame (12) is connected to the driving end of the pressing and heating control component.

6. The automatic welding device for waterproof membrane according to claim 5, characterized in that: The heating assembly includes a waterproof membrane heat-sealing heating plate (8) and a heating plate fixing slider (21). The waterproof membrane heat-sealing heating plate (8) is located between the passive waterproof membrane pressure roller (4) and the active waterproof membrane pressure roller (13). One end of the waterproof membrane heat-sealing heating plate (8) is fixedly connected to the heating plate fixing slider (21), and the heating plate fixing slider (21) is slidably connected to the pressing and heating control assembly.

7. The automatic welding device for waterproof membrane according to claim 6, characterized in that: The pressing and heating control assembly includes a control mechanism frame (14), a frame pressing drive shaft (15), a control handle (16), a heating plate adjustment lever (17), a frame pressing push rod (18), a linkage drive lever (19), and a heating plate drive linkage (20). The control mechanism frame (14) is fixedly connected to the upper frame (9). One end of the frame pressing drive shaft (15) passes through the control mechanism frame (14) and is fixedly connected to the control handle (16). The frame pressing drive shaft (15) is rotatably connected to the control mechanism frame (14). The other end of the frame pressing drive shaft (15)... One end is fixedly connected to the frame pressing push rod (18), and the other end of the frame pressing push rod (18) is in contact with the upper end of the movable frame (12). One end of the heating plate adjusting lever (17) is fixedly connected to the frame pressing drive shaft (15). The connecting rod driving block (19) is fixedly connected to the other end of the heating plate adjusting lever (17). One end of the heating plate driving connecting rod (20) is provided with a sliding groove. The connecting rod driving block (19) is slidably connected to the sliding groove of the heating plate driving connecting rod (20). The other end of the heating plate driving connecting rod (20) is fixedly connected to the heating plate fixed slider (21).

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