Liquid waterproofing agent double cut-off precise anti-dripping filling device

Abstract

The utility model relates to the field of weighing and filling equipment, and specifically relates to a liquid waterproof agent double-cut-flow precise anti-dripping filling device. The utility model discloses a liquid filling unit, weighing and conveying unit, the liquid filling unit includes the back suction type filling head, and the back suction piston of filling head opens and closes the blanking port of outer shell in the mode of being arranged below outer shell, and the lower end of outer shell is detachably connected with the retaining ring surrounding the outer periphery of back suction piston. The weighing and conveying unit includes a weighing table and a pulling mechanism that rotates up and down around the weighing table, the weighing table includes a bottom plate, a weighing sensor, a floating plate, and a fixed plate, the weighing sensor is arranged at the lower end of the bottom plate, the fixed plate is fixedly supported above the bottom plate, the floating plate is supported on the bottom plate by a compression spring assembly and located on both sides of the fixed plate, and the height of the floating plate is higher than that of the fixed plate when there is no load on the floating plate. The multiple structures are connected and matched to achieve the effect of preventing dripping during the whole filling process, and the precise control of the single-barrel filling amount is realized at the same time.

Description

Technical Field

[0001] This utility model relates to the field of weighing and filling equipment, specifically to a liquid waterproofing agent double-intercepting precision anti-drip filling device. Background Technology

[0002] MATE-ADV concrete self-healing waterproofing and densifying agent, or simply waterproofing agent, suffers from leakage at the filling head and barrel openings when using existing equipment. Dried agent often forms on the outer wall of the finished barrel, affecting the product's appearance and requiring manual cleaning. Furthermore, splashing and leakage during filling cause the waterproofing agent to flow onto the conveyor belt, corroding the machine frame and severely impacting the equipment's lifespan.

[0003] Existing technology uses a back-suction filling head to reduce liquid leakage. Utility model patent CN215667090U discloses a back-suction filling head, which includes a housing and a back-suction rod. The back-suction rod is located inside the housing and can reciprocate relative to the housing. The back-suction rod is equipped with a sealing head, a back-suction piston, and a back-suction hole. The sealing head and the back-suction piston are located at opposite ends of the back-suction rod, with the sealing head located in the filling chamber and the back-suction piston located in the back-suction chamber. This back-suction filling head can solve the problem of residual filling medium at the filling head outlet. However, the viscosity of self-healing waterproofing agents changes with ambient temperature and is prone to particle formation. During the filling process of the waterproofing agent, this often affects the sealing performance of the piston, resulting in liquid leakage.

[0004] In addition, temperature changes cause fluctuations in the density of the liquid, and excessively low temperatures can lead to the formation of flocculent matter or particles. Therefore, waterproofing agents are not suitable for volumetric filling; gravimetric filling is preferable. To ensure the accuracy of the filling weight, each container needs to be weighed individually.

[0005] Existing weighing and conveying equipment consists of a single conveyor frame resting on a set of sensors, making it impossible to weigh multiple containers independently. Only by arranging multiple independent, physically isolated small weighing and conveying units side-by-side can simultaneous filling and independent weighing of multiple containers be achieved. However, this solution is rarely used in existing equipment and suffers from significant engineering drawbacks such as complex docking structures and high interference risks. Another example is the patent CN100554134C, titled "Visual Addressing and Positioning Automatic Filling Equipment," which discloses a different automatic weighing device. This device includes an electronic scale connected to the bottom of the frame and a lifting mechanism fixed to a support platform, detaching the bottom of the filling container from the conveyor rollers for weighing; its structure is complex.

[0006] Therefore, designing a drip-proof and precisely metered weighing filling device suitable for this waterproofing agent has become an urgent problem to be solved. Utility Model Content

[0007] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a drip-proof waterproofing agent filling device and a conveying device that can achieve accurate weighing of a single barrel.

[0008] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: This utility model includes a liquid filling unit and a weighing and conveying unit. The liquid filling unit includes a back-suction filling head. The back-suction piston of the filling head opens and closes the discharge port of the outer shell in such a way that it is located below the outer shell. A retaining ring is detachably connected to the lower end of the outer shell and surrounds the outer periphery of the back-suction piston. After filling, the back-suction filling head can remove the residual liquid at the bottom of the piston, but it cannot prevent leakage caused by a poor piston seal. This invention places the back-suction piston outside the outer shell. Operating the back-suction piston before and after filling opens the discharge port, facilitating cleaning of the piston and the sealing surfaces of the discharge port. This prevents liquid particles from separating or even drying, which could affect the piston's seal and cause leakage. Because the back-suction piston is located below the outer shell, the liquid flowing from the discharge port impacts the piston. The retaining ring, connected to the lower end of the outer shell and surrounding the back-suction piston, effectively blocks splashed liquid. The removable installation method allows for easy removal of the retaining ring and cleaning of the piston seal.

[0009] The weighing and conveying unit includes a weighing platform located below the filling head and a material pulling mechanism that rotates up and down around the weighing platform. The weighing platform includes a base plate, a weighing sensor, a floating plate, and a fixed plate. The weighing sensor is located at the lower end of the base plate. The fixed plate is fixedly supported above the base plate. The floating plate is supported on the base plate by a compression spring assembly and is located on both sides of the fixed plate. When there is no load on the floating plate, its height is higher than that of the fixed plate.

[0010] During use, the feeding mechanism pulls the empty container, causing it to slide on the floating plate and eventually stop under the filling head. Then, the filling head moves down to the appropriate depth inside the container before filling. In existing technology, the filling head remains stationary after reaching this position, easily leading to liquid splashing. This invention, due to the floating plate on the compression spring, allows the filling head to penetrate deeper. As liquid is injected, the container presses down on the floating plate and gradually sinks, allowing the filling head to slowly move away from the bottom of the container without being submerged. Finally, the container rests on the fixed plate, receiving more stable support. This design cleverly utilizes the weight variation of the filling container, achieving a deeper initial insertion depth and reducing liquid splashing without modifying the lifting mechanism of the filling head.

[0011] Furthermore, the system includes several filling heads arranged along the conveying direction, each with a corresponding weighing platform underneath. The floating plates of these weighing platforms are connected front to back to form a sliding conveying surface. When multiple filling heads are used simultaneously, the empty container can slide along this sliding conveying surface—the surface formed by the connecting floating plates—to reach the designated position. Each container is mounted on a separate weighing platform, enabling precise control of the filling weight of a single container.

[0012] Furthermore, the material pulling mechanism includes a rotary chain and a pull plate connected to the rotary chain, the pull plate having a limiting groove in the middle. This configuration allows the empty bucket to be positioned laterally within the groove.

[0013] Furthermore, the compression spring assembly includes a guide post and a compression spring sleeved on the guide post. The upper end of the guide post is fixedly connected to the lower end face of the floating plate, and the lower end is slidably inserted into the base plate. The compression spring itself cannot resist lateral forces; the guide post ensures that the floating plate does not tip over and moves smoothly up and down.

[0014] Furthermore, a smooth non-metallic sheet is laid on the upper part of the floating plate. Currently, there are a variety of mature materials available in the industrial field, such as ultra-high molecular weight polyethylene sheet and polytetrafluoroethylene sheet. Non-metallic sheets have advantages such as light weight, low coefficient of friction, low operating noise, and resistance to acid and alkali corrosion, which not only meet the sliding requirements of the filling barrels but also do not add excessive weight to the floating plate and compression spring.

[0015] Furthermore, the fixing plate is U-shaped. This design creates two linear tracks on the upper surface of the U-shaped structure, resulting in a small contact area between the filled bucket and the fixing plate, significantly reducing resistance and lessening the load on the pulling mechanism motor.

[0016] Furthermore, a collection tray connected to the raw material storage tank is provided below the filling head, and the collection tray is mounted on a cylinder that extends and retracts in the left and right direction. In this way, an additional layer of protection is provided, and the collection tray can collect and recover leaked liquid when other anti-drip measures fail.

[0017] Furthermore, the liquid filling unit also includes a constant-temperature storage silo with heat exchange function, which is used to supply the filling head with a constant-temperature liquid. Even further, the constant-temperature storage silo includes a silo body, a heat exchange device, and a stirring device. Since the liquid waterproofing agent is in an emulsion state, improper temperature control can lead to emulsion breakdown, resulting in flocculent matter, particles, or stratification; therefore, a constant-temperature storage silo is necessary. Maintaining a uniform emulsion state of the waterproofing agent at a stable temperature not only ensures the uniform and stable quality of the filled product but also prevents blockage of the filling pipeline.

[0018] Furthermore, the system also includes a controller with a filling head height adjustment module. A barrel height measuring sensor is located at the front end of the weighing and conveying unit. The filling head is mounted on the lifting mechanism. The barrel height measuring sensor is electrically connected to the input terminal of the controller, and the drive component of the lifting mechanism is electrically connected to the output terminal of the controller. The controller controls the lifting mechanism to descend a preset distance based on the signal from the barrel height measuring sensor. By collecting the signal from the barrel height detection sensor, the controller corrects the descent stopping height of the lifting mechanism to adapt to the filling height requirements of different barrel sizes, preventing overflow caused by the filling head being inserted too deeply or splashing of liquid caused by the filling head being positioned too high.

[0019] The beneficial effects of this utility model are: 1. Before use, the back-suction filling head of this utility model can easily clean the dry material or particles at the piston seal to ensure the sealing effect. The floating plate design allows the initial filling position of the filling head to be deeper into the barrel. During the filling process, the retaining ring prevents the liquid from overflowing. After filling, the residual liquid is vacuumed back-suctioned. The multi-structure connection and cooperation work together to achieve the function of preventing dripping throughout the filling process, avoiding the waterproofing agent from drying on the outer wall of the barrel and affecting the product appearance, and also avoiding the waterproofing agent from corroding the frame and other parts.

[0020] 2. The conveying unit of this utility model features an ingenious structural design. The floating plate sinks during the filling process, while the fixed plate provides stronger and more stable support to the filled bucket. Furthermore, the fixed plate is designed with a U-shaped structure, which gives it two linear tracks. This reduces the contact area between the bucket and the fixed plate, significantly decreasing sliding resistance, reducing the load on the pulling mechanism motor, and improving the durability of the equipment.

[0021] 3. This utility model achieves precise control of the filling volume of a single barrel. By setting a weighing platform under each filling head, and connecting several weighing platforms to form a sliding conveyor surface, the weight of each barrel of product can be individually weighed and precisely controlled when multiple filling heads are filling simultaneously.

[0022] 4. The constant temperature storage silo of this utility model can maintain a stable temperature for the waterproofing agent, thereby maintaining a uniform emulsion state. Not only are the product properties uniform and stable, but the filling pipeline can also be prevented from being blocked.

[0023] 5. The filling head height adjustment module of the controller, by collecting the signal from the barrel height detection sensor, corrects the downward stopping height of the lifting mechanism to adapt to the filling height requirements of different barrel sizes, and avoids overflow caused by the filling head being inserted too deeply or splashing of liquid caused by the position being too high. Attached Figure Description

[0024] Figure 1 This is a structural schematic diagram of the present invention from the main viewing angle; Figure 2 yes Figure 1A cross-sectional view of point A, showing the feed inlet in a closed state; Figure 3 yes Figure 1 A cross-sectional structural diagram at point A, showing the discharge port in an open state; Figure 4 This is a partial structural schematic diagram of the weighing and conveying unit from a top-down perspective; Figure 5 This is a schematic diagram of the weighing platform. In the diagram: 1. Liquid filling unit; 10. Filling head; 100. Outer shell; 101. Seal; 102. Back suction piston; 103. Hollow valve stem; 104. Retaining ring; 105. Valve stem cylinder; 2. Weighing and conveying unit; 20. Frame; 21. Pull plate; 210. Groove; 22. Weighing sensor; 23. Base plate; 24. Fixed plate; 25. Floating plate; 250. Compression spring; 251. Guide column; 3. Constant temperature storage bin. Detailed Implementation

[0025] The principles and features of this utility model are described below with reference to the accompanying drawings. The embodiments described are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0026] Example 1: like Figure 1 As shown, the liquid waterproofing agent dual-interception precision anti-drip filling device of this embodiment includes a liquid filling unit 1 and a weighing and conveying unit 2.

[0027] The liquid filling unit 1 adopts a back-suction filling head 10, such as Figures 1 to 3 As shown, the back-suction filling head 10 includes an outer shell 100 and a hollow valve stem 103 passing through it. The upper end of the hollow valve stem 103 is connected to a negative pressure system, and the lower end of the hollow valve stem 103 is provided with a back-suction piston 102. The back-suction piston 102 has a downward-through channel that communicates with the hollow valve stem 103. The back-suction piston 102 opens and closes the discharge port of the outer shell 100 by being positioned below the outer shell 100. A retaining ring 104 is detachably connected to the lower end of the outer shell 100 by means of snap-fit ​​or screw connection, surrounding the outer periphery of the back-suction piston 102. The up-and-down sliding of the hollow valve stem 103 is usually controlled by a valve stem cylinder 105, which is connected to the piston rod of the valve stem cylinder 105 by connecting the upper end of the hollow valve stem 103 to the piston rod of the valve stem cylinder 105. One side of the outer shell 100 is connected to a waterproofing agent inlet pipe, and a solenoid valve can be installed on the waterproofing agent inlet pipe to control the opening and closing of the pipe.

[0028] During use, the suction piston 102 moves downward to open the discharge port, allowing the liquid to be introduced between the outer casing 100 and the hollow valve stem 103 and flow out from the discharge port. Since the suction piston 102 is located below the outer casing 100, the liquid flowing out of the discharge port impacts the piston, and the retaining ring 104 effectively blocks splashing liquid. The screw-on installation method facilitates the removal of the retaining ring 104 for cleaning the piston seal. After filling, the suction piston 102 moves upward to close the discharge port, simultaneously activating the negative pressure system, and residual liquid is sucked away through the channels of the suction piston 102.

[0029] Specifically, the top of the suction piston 102 is conical, and the discharge port of the outer casing 100 is provided with a sealing element 101, such as a rubber ring, for sealing and engaging with the conical structure of the suction piston 102. The conical structure and the sealing element 101 work together to achieve a good sealing effect.

[0030] In order to automatically control the lifting and lowering of the filling head 10, the filling head 10 can be installed in a lifting mechanism. Common lifting mechanisms in the field, such as chain-type lifting mechanism, screw-type lifting mechanism, and cylinder-driven lifting mechanism, can be selected. The specific structure will not be described in detail.

[0031] like Figure 4 and Figure 5 As shown, the weighing and conveying unit 2 includes a weighing platform located below the filling head 10 and a material pulling mechanism that rotates up and down around the weighing platform. The filling barrel is placed on the weighing platform and is pulled and slid by the material pulling mechanism.

[0032] The material pulling mechanism mainly includes a frame 20, a rotary motor, a rotary chain, a sprocket, and a pulling plate 21. The pulling plate 21 is fixed on the rotary chain, and the middle of the pulling plate 21 has a limiting groove 210 to achieve positioning of the barrel in the left-right direction. Commonly used filling barrels are approximately cylindrical, so the groove 210 can be set to an arc shape.

[0033] The weighing platform includes a base plate 23, a weighing sensor 22, a floating plate 25, and a fixed plate 24. The weighing sensor 22 is located at the lower end of the base plate 23. The fixed plate 24 is fixedly supported above the base plate 23. The floating plate 25 is supported on the base plate 23 by a compression spring assembly and is located on the left and right sides of the fixed plate 24. When there is no load on the floating plate 25, its height is higher than that of the fixed plate 24. In this way, the empty bucket is supported on the floating plate 25 and can slide along the floating plate 25. The filled bucket falls on the fixed plate 24, which can withstand heavier forces to provide stable support for the bucket. During use, as the liquid is injected, the bucket presses down on the compression spring 250 and gradually sinks. This feature can be used to set a deeper initial filling position for the filling head 10. Even when the filling head 10 is fixed, it can gradually move away from the bottom of the bucket as the liquid level rises, avoiding being submerged.

[0034] Waterproofing agents are commonly packaged in 5L or 25L plastic containers. Due to the large volume required, the weighing platform needs to have a high load-bearing capacity. Therefore, shear beam load cells 22 are preferred. Four load cells 22 are arranged at the four corners of the base plate 23 and mounted on the frame 20 to provide stable and balanced support for the base plate 23. The weighing junction box sums and processes the signals from each sensor before transmitting them to the controller.

[0035] Preferably, a smooth non-metallic sheet is installed on the upper end of the floating plate 25. Currently, there are a variety of mature materials available in the industrial field, such as ultra-high molecular weight polyethylene sheet and polytetrafluoroethylene sheet. Non-metallic sheets have advantages such as light weight, low coefficient of friction, low operating noise, and resistance to acid and alkali corrosion, which not only meets the sliding requirements of the filling barrel, but also does not impose excessive additional weight on the compression spring 250.

[0036] To ensure the stability of the floating plate 25 and prevent it from tipping over, compression spring assemblies are preferably installed at its four corners. Each compression spring assembly includes a guide post 251 and a compression spring 250 fitted onto the guide post 251. The upper end of the guide post 251 is fixedly connected to the lower end face of the floating plate 25, and the lower end is slidably inserted into the base plate 23. The compression spring 250 itself cannot resist lateral forces; therefore, the guide posts 251 ensure that the floating plate 25 does not tip over and moves smoothly up and down.

[0037] In this embodiment, the controller, in conjunction with sensors and actuators, automates the entire process of barrel feeding, positioning, filling, and barrel discharging. A PLC controller is preferred. Sensors include a barrel height detection sensor (such as a measuring light curtain) installed at the front end of the weighing and conveying unit 2, a position sensor at the filling station at the rear end of the conveying unit, and a weighing sensor 22. The barrel height measurement sensor, position sensor, and weighing sensor 22 are electrically connected to the controller's input terminal. The drive components of the filling head 10 lifting mechanism, the material pulling mechanism, the solenoid valve of the waterproofing agent input pipe, the sliding drive component of the hollow valve stem 103, and the solenoid valve of the negative pressure system are electrically connected to the controller's output terminal.

[0038] The controller has a filling head 10 height adjustment module. When in use, the feeding mechanism is started and the bucket passes the bucket height detection sensor. The controller collects the real-time signal of the bucket height detection sensor and dynamically corrects the downward stopping height of the lifting mechanism to adapt to the filling height requirements of different bucket sizes, avoiding overflow caused by the filling head 10 being inserted too deeply or splashing of liquid caused by the position being too high.

[0039] When the material-pulling mechanism delivers the bucket to the filling station, the position sensor outputs a positioning signal, and the controller triggers the material-pulling mechanism to stop, precisely positioning the bucket directly below the filling head 10. The controller then controls the solenoid valve of the waterproofing agent inlet pipe to open, initiating the filling process.

[0040] During the filling process, the weighing sensor 22 collects weight data in real time. When the detected value reaches the preset filling weight threshold, the controller controls the solenoid valve to close and cut off the filling passage. Then, it controls the sliding drive component of the hollow valve stem 103 to block the outlet. Next, it controls the solenoid valve of the negative pressure system to open, so that the hollow valve stem 103 connects to the negative pressure system to suck out the residual liquid. Finally, it outputs a start signal to drive the material pulling mechanism to move the filled barrel smoothly out of the workstation.

[0041] Before use, the back-suction filling head 10 of this embodiment can easily clean the dry material or particles at the piston seal to ensure the sealing effect. The design of the floating plate 25 allows the initial filling position of the filling head 10 to be deeper into the barrel. During the filling process, the screw-in retaining ring 104 prevents the liquid from overflowing. After filling, the residual liquid is vacuumed back-suctioned. The multi-structure connection and cooperation work together to achieve the anti-drip effect throughout the filling process, avoiding the waterproofing agent from drying on the outer wall of the barrel and affecting the product appearance, and also avoiding the waterproofing agent from corroding the frame 20 and other parts.

[0042] Optionally, a collection tray connected to the raw material storage tank can be installed below the filling head 10, and the collection tray can be mounted on a cylinder that extends and retracts in the left and right directions. In the non-filling state, the cylinder is extended to place the collection tray below the filling head 10. The collection tray can collect and recover leaked liquid when other anti-drip measures fail, providing an additional layer of protection. When preparing to fill, the cylinder is retracted to move the collection tray away from the filling head 10 without affecting the material feeding.

[0043] Example 2: This embodiment, based on embodiment 1, includes several filling heads 10 arranged along the conveying direction. Each filling head 10 is fitted with a corresponding weighing platform. The floating plates 25 of these weighing platforms are connected front to back to form a sliding conveying surface. The length of the floating plates 25 in the conveying direction does not exceed three times the diameter or length of the barrel bottom. This ensures that each floating plate 25 is always subjected to downward pressure from the barrel as it moves forward synchronously on the floating plates 25, keeping the floating plates 25 in a single plane. Correspondingly, the spacing between the pull plates 21 matches the length of the floating plates 25. A set of pull plates 21 pulls a set of empty barrels along the sliding conveying surface. Upon reaching the workstation, multiple filling heads 10 can simultaneously perform filling operations. After filling, the barrel presses down on the floating plates 25 and falls onto the fixed plate 24, then is pulled by the pull plates 21 and slides out of the workstation.

[0044] Each barrel is equipped with an individual weighing platform, enabling precise control of the filling weight of a single barrel. Furthermore, the controller works in conjunction with the weighing sensor 22, which collects weight data in real time during the filling process. When the detected value reaches a preset filling weight threshold, the controller controls the solenoid valve to close, cutting off the filling path and automatically and precisely controlling the filling volume.

[0045] Example 3: Based on the aforementioned embodiments, this embodiment designs the fixing plate 24 to be U-shaped. In this way, as... Figure 5 As shown, the upper surface of the U-shaped structure forms two linear tracks, resulting in a very small contact area between the filled bucket and the fixed plate 24, which greatly reduces the sliding resistance of the bucket and lightens the load on the pulling mechanism motor. Furthermore, rolling components, such as roller sets or rollers, can be provided along the conveying direction within the groove 210 of the U-shaped structure of the fixed plate 24. The low frictional resistance of the rolling components provides stable support for the bucket, making the bucket transport process smoother and more stable.

[0046] Example 4: Based on the aforementioned embodiments, this utility model adds the following: Figure 1 The temperature-controlled storage silo 3 shown has a heat exchange function and is used to supply the filling head 10 with a temperature-controlled liquid. Since the viscosity of the liquid waterproofing agent changes with ambient temperature, improper temperature control can lead to emulsion breakdown, resulting in flocculent material, particles, or stratification. Therefore, setting up a temperature-controlled storage silo 3 is necessary. Maintaining a uniform emulsion state of the waterproofing agent at a stable temperature not only ensures the uniform and stable quality of the filled product but also prevents blockage of the filling pipeline.

[0047] Specifically, the constant temperature storage silo 3 includes a silo body and a heat exchange device, and may further include a stirring device. The heat exchange device can heat or cool the waterproofing agent inside the silo. Temperature control can be achieved by electric heating combined with air cooling or water cooling, or by using methods commonly used in the field, such as jacketing and introducing a heat exchange medium, to maintain the liquid at a preset temperature, such as 25℃±2℃.

[0048] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A liquid waterproofing agent dual-interception precision anti-drip filling device, comprising a liquid filling unit (1) and a weighing and conveying unit (2), characterized in that: The liquid filling unit (1) includes a back-suction filling head (10), the back-suction piston (102) of the filling head (10) opens and closes the discharge port of the outer shell (100) in such a way that it is located below the outer shell (100), and the lower end of the outer shell (100) is detachably connected to a retaining ring (104) surrounding the outer periphery of the back-suction piston (102). The weighing and conveying unit (2) includes a weighing platform located below the filling head (10) and a material pulling mechanism that rotates up and down around the weighing platform. The weighing platform includes a base plate (23), a weighing sensor (22), a floating plate (25), and a fixed plate (24). The weighing sensor (22) is located at the lower end of the base plate (23). The fixed plate (24) is fixedly supported above the base plate (23). The floating plate (25) is supported on the base plate (23) by a compression spring assembly and is located on both sides of the fixed plate (24). When there is no load on the floating plate (25), its height is higher than that of the fixed plate (24).

2. The liquid waterproofing agent dual-interception precision anti-drip filling device according to claim 1, characterized in that, It includes several filling heads (10) arranged along the conveying direction, and a weighing platform is provided under each filling head (10). The floating plates (25) of the several weighing platforms are connected front and back to form a sliding conveying surface.

3. The liquid waterproofing agent dual-interception precision anti-drip filling device according to claim 1, characterized in that, The material pulling mechanism includes a rotary chain and a pull plate (21) connected to the rotary chain, and the pull plate (21) has a limiting groove (210) in the middle.

4. The liquid waterproofing agent dual-interception precision anti-drip filling device according to claim 1, characterized in that, The compression spring assembly includes a guide post (251) and a compression spring (250) sleeved on the guide post (251). The upper end of the guide post (251) is fixedly connected to the lower end face of the floating plate (25), and the lower end is slidably inserted into the base plate (23).

5. The liquid waterproofing agent dual-interception precision anti-drip filling device according to claim 1, characterized in that, The upper end of the floating plate (25) is covered with a smooth non-metallic plate.

6. The liquid waterproofing agent dual-interception precision anti-drip filling device according to claim 1, characterized in that, The fixing plate (24) is U-shaped.

7. The liquid waterproofing agent dual-interception precision anti-drip filling device according to claim 1, characterized in that, The filling head (10) is provided with a liquid collection tray connected to the raw material storage tank below it. The liquid collection tray is installed on a cylinder that extends and retracts in the left and right directions.

8. The liquid waterproofing agent dual-interception precision anti-drip filling device according to claim 1, characterized in that, The liquid filling unit (1) also includes a constant temperature storage bin (3) with heat exchange function, which is used to provide constant temperature liquid to the filling head (10).

9. The liquid waterproofing agent dual-interception precision anti-drip filling device according to claim 8, characterized in that, The constant temperature storage silo (3) includes a silo body, a heat exchange device, and a stirring device.

10. The liquid waterproofing agent dual-interception precision anti-drip filling device according to claim 1, characterized in that, It also includes a controller, which has a filling head (10) height adjustment module. The weighing and conveying unit (2) is equipped with a barrel height measuring sensor at its front end. The filling head (10) is installed on the lifting mechanism. The barrel height measuring sensor is electrically connected to the input end of the controller. The driving component of the lifting mechanism is electrically connected to the output end of the controller. The controller controls the lifting mechanism to descend a preset distance according to the signal from the barrel height measuring sensor.

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