Plasticizer metering tank for waterproofing membrane production

Abstract

This utility model discloses a plasticizer metering tank for waterproof membrane production, including a feeding assembly, a discharging assembly, a metering tank body, and a volume-changing device. The feeding assembly is located above the metering tank body, and the discharging assembly is located below the metering tank body. The volume-changing device is located on the metering tank body and is connected to the metering tank body. The volume-changing device includes a cylinder body, a cylinder cover, a pushing assembly, and a support plate. The bottom of the cylinder body is connected to the metering tank body through the support plate, the cylinder cover is located above the cylinder body, the pushing assembly is located inside the cylinder body, and the support plate is connected to the metering tank body. This application can solve the problems of repeated metering, cumbersome operation, and easy human weighing errors when metering plasticizers, and can also solve the problems of insufficient adaptability, limited metering accuracy, and poor operational flexibility of fixed-capacity metering tanks.

Description

Technical Field

[0001] This utility model belongs to the field of waterproof membrane production technology, and in particular relates to a plasticizer metering tank for waterproof membrane production. Background Technology

[0002] In the production of waterproof membranes, plasticizers are key additives, and their dosage directly affects the membrane's core properties such as flexibility and weather resistance. However, plasticizers require weighing each time, which is cumbersome. Because they are liquids, it's easy to exceed the predetermined value when adding plasticizer to the metering tank, leading to manual weighing errors. Designing a fixed-capacity metering tank to replace manual weighing has significant limitations in practical applications: First, it lacks adaptability. Different types and specifications of waterproof membranes have significantly different plasticizer requirements. Fixed-capacity metering tanks cannot flexibly match different production formulas. Changing product types often requires replacing the metering tank, increasing equipment costs and reducing operational flexibility. Relying on manual replacement of parts (such as metering chambers of different sizes) is cumbersome and time-consuming. In continuous production, frequent downtime for adjustments severely impacts production efficiency and increases costs. Second, metering accuracy is limited. In small-batch production or when fine-tuning the formula is required, fixed-capacity metering tanks struggle to achieve precise control of small dosages. For example, when it is necessary to reduce the amount of plasticizer added by 5% from the original amount, the fixed capacity tank may not be able to perform accurately due to the minimum scale limitation, resulting in deviations in the performance of the roll material.

[0003] To address the aforementioned problems, a simple and easy-to-use adjustable-capacity plasticizer metering container has been invented. This container is suitable for metering different plasticizer weights within a certain range while ensuring metering accuracy. It solves the problems of repeated metering, cumbersome operation, and susceptibility to human error when metering plasticizers, as well as the limitations of fixed-capacity metering containers in terms of adaptability, metering accuracy, and operational flexibility. Utility Model Content

[0004] In view of this, the present invention aims to provide a plasticizer metering tank for the production of waterproof membranes, so as to solve at least one technical problem in the background art.

[0005] This application achieves variable-volume metering by adding a cylinder-based capacity adjustment device to a metering tank, thus accommodating different amounts of plasticizer required in the production formulation. The effective capacity of the variable-volume metering tank is indicated by a scale, which allows the desired amount of plasticizer to be set.

[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows: A plasticizer metering tank for waterproof membrane production includes a feeding assembly, a discharging assembly, a metering tank body, and a volume-changing device; The feeding assembly is located above the metering tank, and the discharging assembly is located below the metering tank; The variable volume device is installed on the metering tank and is connected to the metering tank; The displacement device includes a cylinder block, cylinder head, push assembly, and support plate; The bottom of the cylinder is connected to the metering tank via a support plate. The cylinder cover is located on top of the cylinder, the push assembly is located inside the cylinder, and the support plate is connected to the metering tank.

[0007] Furthermore, the actuating components include a lead screw, piston body, and vent pipe; The piston body is located at the end of the lead screw. The vent pipe passes through the cylinder head and is installed on the piston body. The vent pipe is connected to the cylinder body and connects the tank body to the outside. The cylinder head is provided with threads corresponding to the lead screw.

[0008] Rotating the lead screw can drive the piston to move up and down.

[0009] Furthermore, the end of the lead screw is equipped with a height dial and a handle, and a height gauge is provided on one side of the cylinder head; The height dial is located on one side of the height gauge.

[0010] Turning the handle can drive the lead screw and the piston at the bottom to move vertically.

[0011] Furthermore, the piston body includes an upper piston disc, a sealing gasket, and a lower piston disc; the upper piston disc, the sealing gasket, and the lower piston disc are arranged in sequence, and the upper part of the upper piston disc is engaged with the lower part of the lead screw.

[0012] The highest position of the lower piston disc is lower than the lowest point of the horizontal end of the L-shaped tube of the overflow pipe (more than 20mm).

[0013] Furthermore, it also includes an overflow assembly, which includes an overflow pipe and a collector; the overflow pipe is disposed on the cylinder head. The collector is located below the overflow pipe, which includes a vertical pipe and an L-shaped pipe; The vertical pipe is connected to the horizontal end of the L-shaped pipe, and the vertical end of the L-shaped pipe is positioned above the collector.

[0014] The outlet of the vent pipe is higher than the horizontal end of the L-shaped tube of the overflow pipe.

[0015] The overflow pipe is located above the tank lid, and its horizontal section is higher than the tank lid (by more than 20mm).

[0016] Furthermore, the feeding assembly includes a feeding pipe and a feeding valve. The feeding pipe is located above the metering tank, and the feeding valve is located on the feeding pipe.

[0017] Furthermore, the discharge assembly includes a discharge pipe and a discharge valve. The discharge pipe is located below the metering tank, and the discharge valve is located on the discharge pipe.

[0018] Furthermore, the metering tank includes the tank body, the tank cone, and the tank cover; The can lid is located above the can body, and the can cone is located below the can body; The variable volume device and the feeding assembly are both located on the tank cover, while the discharge assembly is located on the tank cone.

[0019] Compared with existing technologies, the plasticizer metering tank for waterproof membrane production described in this utility model has the following advantages: This application achieves variable-volume metering by adding a cylinder-based capacity adjustment device to a quantitative metering tank. This adapts to the metering requirements of different plasticizer weights within a certain range while ensuring metering accuracy. It solves the problems of repeated metering, cumbersome operation, and susceptibility to human weighing errors when metering plasticizers, as well as the insufficient adaptability, limited metering accuracy, and poor operational flexibility of fixed-capacity metering tanks. Attached Figure Description

[0020] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings: Figure 1 This is a schematic diagram of a plasticizer metering tank for the production of waterproof membrane according to this utility model; Figure 2 A cross-sectional view of a plasticizer metering tank for waterproof membrane production according to this utility model. Figure 3 The present utility model proposes Figure 2 Enlarged view of point A. Attached image description: 1. Discharge valve; 2. Tank cone; 3. Collector; 4. Overflow pipe; 5. Cylinder body; 6. Cylinder cover; 7. Height dial; 8. Scale; 9. Handle; 10. Lead screw; 11. Vent pipe; 12. Feed pipe; 13. Feed valve; 14. Tank cover; 15. Tank body; 16. Discharge pipe; 17. Upper piston plate; 18. Sealing gasket; 19. Lower piston plate; 20. Support plate. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0023] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Example 1 A plasticizer metering tank for waterproof membrane production includes a feeding assembly, a discharging assembly, a metering tank body, and a volume-changing device. The feeding assembly is located above the metering tank body, and the discharging assembly is located below the metering tank body. The volume-changing device is located on the metering tank body and is connected to the metering tank body. The volume-changing device includes a cylinder body 5, a cylinder cover 6, a pushing assembly, and a support plate 20. The bottom of the cylinder body 5 is connected to the metering tank body through the support plate 20, the cylinder cover 6 is located above the cylinder body 5, the pushing assembly is located inside the cylinder body 5, and the support plate 20 is connected to the metering tank body.

[0027] The actuating assembly includes a lead screw 10, a piston body, and a vent pipe 11. The piston body is located at the end of the lead screw 10. The vent pipe 11 passes through the cylinder head 6 and is mounted on the piston body, and is connected to the cylinder body 5. The vent pipe 11 connects the tank body 15 to the outside. The cylinder head 6 has threads corresponding to the lead screw 10. Rotating the lead screw 10 can drive the piston body to move up and down.

[0028] The end of the lead screw 10 is equipped with a height plate 7 and a handle 9, and a height gauge is provided on one side of the cylinder head 6; the height plate 7 is located on one side of the height gauge. Turning the handle 9 can drive the lead screw 10 and the piston body at the bottom to move vertically.

[0029] The piston body includes an upper piston disc 17, a sealing gasket 18, and a lower piston disc 19; the upper piston disc 17, the sealing gasket 18, and the lower piston disc 19 are arranged sequentially, and the upper part of the upper piston disc 17 is engaged with the lower part of the lead screw 10. The highest position of the lower piston disc 19 is lower than the lowest point of the horizontal end of the L-shaped tube of the overflow pipe 4 (more than 20mm).

[0030] It also includes an overflow assembly, which comprises an overflow pipe 4 and a collector 3. The overflow pipe 4 is positioned above the cylinder head 6, and the collector 3 is positioned below the overflow pipe 4. The overflow pipe 4 includes a vertical pipe and an L-shaped pipe. The vertical pipe is connected to the horizontal end of the L-shaped pipe, and the vertical end of the L-shaped pipe is positioned above the collector 3. The outlet of the vent pipe 11 is higher than the horizontal end of the L-shaped pipe of the overflow pipe 4. The overflow pipe 4 is located above the tank cover 14, and its horizontal portion is higher than the tank cover 14 (by more than 20 mm).

[0031] The feeding assembly includes a feeding pipe 12 and a feeding valve 13. The feeding pipe 12 is located above the metering tank, and the feeding valve 13 is located on the feeding pipe 12. The discharging assembly includes a discharging pipe 16 and a discharging valve 1. The discharging pipe 16 is located below the metering tank, and the discharging valve 1 is located on the discharging pipe 16.

[0032] The metering tank includes a tank body 15, a tank cone 2, and a tank cover 14; the tank cover 14 is located above the tank body 15, and the tank cone 2 is located below the tank body 15; the variable volume device and the feeding assembly are both located on the tank cover 14, and the discharge assembly is located on the tank cone 2.

[0033] Example 2 The variable-capacity plasticizer metering tank consists of four parts: 1. The feeding assembly includes a feeding pipe 12 and a feeding valve 13. The feeding valve 13 is installed on the feeding pipe 12, and the discharging valve 1 is installed on the discharging pipe 16.

[0034] 2. The metering tank includes a tank body 15, a tank cone 2, and a tank cover 14. The tank cover 14 is located on top of the tank body 15, and the tank cone 2 is located at the bottom of the tank body 15. The tank body 15 determines the maximum capacity of the metering tank, and the cone shape of the tank cone 2 facilitates the complete discharge of plasticizer without residue.

[0035] 3. The variable displacement system includes a cylinder body 5, a cylinder head 6, a lead screw 10, a handle 9, a height dial 7, a height gauge 8, an upper piston disc 17, a sealing gasket 18, a lower piston disc 19, a vent pipe 11, and a support plate 20. The piston body, composed of the upper piston disc 17, the sealing gasket 18, and the lower piston disc 19, has a vertical vent pipe 11 mounted on it, extending through a circular hole in the cylinder head 6 to connect the tank body 15 to the outside. The cylinder body 5 is fixed to the tank body 15 by the cylinder head 6 and the support plate 20. The cylinder head 6 is on top of the cylinder body 5, and the piston body is inside. A lead screw 10 is connected to the piston body, extending to the cylinder head 6. A height dial 7 and a handle 9 are mounted and fixed on the lead screw 10 outside the cylinder head 6. The height dial 7 is a horizontal, thin, circular disc. A scale 8 is mounted on the top of the cylinder head 6. Turning the handle 9 causes the lead screw 10 and the piston body at its bottom to move vertically. The vertical clearance between the lower end of the lead screw 10 and the upper piston disc 17 is kept below 2mm to ensure measurement accuracy.

[0036] 4. The overflow section includes an overflow pipe 4 and a collector 3. The collector 3 is used to collect the plasticizer overflowing from the overflow pipe 4. The overflow pipe 4 is located on the cylinder head 13, and the horizontal part of the overflow pipe 4 is higher than the cylinder head 13 (more than 20 mm). The pipe diameter is relatively small, which helps to ensure the accuracy of the plasticizer level indication. In order to ensure that the plasticizer can fully fill the cylinder 5, the highest position of the lower piston plate 19 is lower than the lowest point of the horizontal part of the overflow pipe 4 (more than 20 mm).

[0037] Technical principle: The technical principle of this variable-capacity plasticizer metering tank is as follows: A cylinder 5, connected to the main body 15, is added inside the tank body 15. Rotating the handle 9 drives the lead screw 10, which in turn causes the piston (composed of an upper piston disc 17, a sealing gasket 18, and a lower piston disc 19) inside the cylinder 5 to move vertically up and down, thus changing the effective capacity of the metering tank to accommodate different amounts of plasticizer added in the production formula. The vent pipe 11 and overflow pipe 4 are similar in that their outlets are both higher than the cylinder cover 6 and both connect the inside and outside of the tank. When plasticizer enters the metering tank, the internal air is expelled through the pipes, allowing the plasticizer to fill the effective space of the metering tank. When the plasticizer is discharged, the external atmospheric pressure acts on the surface of the plasticizer liquid, allowing it to flow out smoothly without residue. The difference lies in their locations. The outlet of the vent pipe 11 is higher than the horizontal part of the overflow pipe 4, so no plasticizer will flow out. The overflow pipe 4, however, will allow plasticizer to flow out, thus maintaining a fixed capacity of the metering tank.

[0038] The effective capacity of the variable volume metering tank needs to be calibrated beforehand using the weight of plasticizer. The calibration value is engraved on the scale 8 on the cylinder cover 6, corresponding to the height dial 7 on the lead screw 10. The scale value on the scale 8, which is horizontally aligned with the height dial 7, is the weight of plasticizer that the effective capacity of the metering tank can hold at this time.

[0039] In use, rotate handle 9 to adjust the height of the height dial 7 to the desired position on the scale 8, which corresponds to the plasticizer dosage required by the production formula. Add plasticizer to the metering tank 14. Once the tank is full, the plasticizer overflows from the overflow pipe 4 and flows into the collector 3. Then close the feed valve 13. Because the overflow pipe 4 is located above the tank cover 14 and has a smaller diameter, its liquid level indication accuracy is tens of times higher than that of the tank body 15, achieving a metering accuracy of ±0.05 kg. Discharging the plasticizer from the metering tank represents the set dosage.

[0040] Operating steps Calibration of the effective capacity of the variable volume metering tank. Mark n graduations evenly from bottom to top on the scale 8. The value of n depends on the accuracy requirements, but it must be ensured that when the height dial 7 is at its highest graduation (the nth graduation), the lower piston disc 19 is lower than the lowest point of the horizontal section of the overflow pipe 4. Close the discharge valve 1, turn the handle 9, causing the lead screw 10 and the piston body at the bottom (composed of the upper piston disc 17, sealing gasket 18, and lower piston disc 19) and the height dial 7 to move vertically up and down, adjusting the height dial 7 to its highest position, denoted as Hn. Open the feed valve 13, add plasticizer until plasticizer overflows from the overflow pipe 4, close the feed valve 13, and weigh the overflow amount On. Then, in the same way, lower the height of the height dial 7 by one graduation, denoted as Hn-1, until plasticizer overflows from the overflow pipe 4, weighing the total overflow amount On-1. Calculate the graduation difference ΔWn between Hn and Hn-1 = On-1 - On. Continue lowering the height of the height dial 7 to the next scale mark, denoted as Hn-2. Weigh the overflow amount On-2, and calculate the scale difference ΔWn-1 = On-2 - On-1 between Hn-1 and Hn-2. Continue this process until the lowest scale mark, denoted as H1. Open the discharge valve 1 to release all the plasticizer from the metering tank, weigh the released plasticizer, and use this weight as the calibration value W1 for the H1 mark (i.e., the lowest scale mark), marking it on the scale 8. Based on the recorded weight differences between the scale marks, mark the other scale values ​​on the scale 8. For example, the H2 scale value is W2 = W1 + ΔW2, the H3 scale value is W3 = W2 + ΔW3, ..., the Hn scale value is Wn = Wn-1 + ΔWn.

[0041] Metering Operation. During production, close the discharge valve 1, turn the handle 9 to drive the lead screw 10, vent pipe 11, and the piston body at the bottom (composed of upper piston plate 17, sealing gasket 18, and lower piston plate 19) and height plate 7 to move vertically up and down. Adjust the height plate 7 to the scale position of the required weight value in the process. Open the feed valve 13 and add plasticizer until plasticizer overflows from the overflow pipe 4 and flows into the collector 3. Close the feed valve 13. At this time, the weight of plasticizer contained in the variable volume metering tank is the required weight in the process. Open the discharge valve 1 to release all the plasticizer in the metering tank, completing one metering process of plasticizer.

[0042] This utility model discloses a variable-capacity plasticizer metering tank for waterproof membrane production. It achieves variable-capacity metering by adding a cylinder-based capacity adjustment device within a fixed-volume metering tank, adapting to the metering requirements of different plasticizer weights within a certain range while ensuring metering accuracy. This solves the problems of repeated metering, cumbersome operation, and susceptibility to human weighing errors when metering plasticizers, as well as the insufficient adaptability, limited metering accuracy, and poor operational flexibility of fixed-capacity metering tanks.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A plasticizer metering tank for waterproofing membrane production, characterized by: Includes feeding assembly, discharging assembly, metering tank, and volume change device; The feeding assembly is located above the metering tank, and the discharging assembly is located below the metering tank; The variable volume device is installed on the metering tank and is connected to the metering tank; The displacement device includes a cylinder block, cylinder head, push assembly, and support plate; The bottom of the cylinder is connected to the metering tank via a support plate. The cylinder cover is located on top of the cylinder, the push assembly is located inside the cylinder, and the support plate is connected to the metering tank.

2. The plasticizer weighing tank for waterproofing membrane production according to claim 1, characterized in that: The actuating components include a lead screw, piston body, and vent pipe; The piston body is located at the end of the lead screw. The vent pipe passes through the cylinder head and is installed on the piston body. The vent pipe is connected to the cylinder body and connects the tank body to the outside. The cylinder head is provided with threads corresponding to the lead screw. Rotating the lead screw can drive the piston to move up and down.

3. The plasticizer weighing tank for waterproofing membrane production according to claim 2, characterized in that: The end of the lead screw is equipped with a height dial and a handle, and a height gauge is provided on one side of the cylinder head; The height dial is located on one side of the height gauge.

4. The plasticizer weighing tank for waterproofing membrane production according to claim 2, characterized in that: The piston body includes an upper piston disc, a sealing gasket, and a lower piston disc; the upper piston disc, sealing gasket, and lower piston disc are arranged in sequence, and the upper part of the upper piston disc is engaged with the lower part of the lead screw.

5. The plasticizer weighing tank for waterproofing membrane production according to claim 1, characterized in that: It also includes an overflow assembly, which consists of an overflow pipe and a collector; the overflow pipe is mounted on the cylinder head. The collector is located below the overflow pipe, which includes a vertical pipe and an L-shaped pipe; The vertical pipe is connected to the horizontal end of the L-shaped pipe, and the vertical end of the L-shaped pipe is positioned above the collector; The outlet of the vent pipe is higher than the horizontal end of the L-shaped tube of the overflow pipe.

6. The plasticizer weighing tank for waterproofing membrane production according to claim 1, characterized in that: The feeding assembly includes a feed pipe and a feed valve. The feed pipe is located above the metering tank, and the feed valve is located on the feed pipe.

7. The plasticizer weighing tank for waterproofing membrane production according to claim 1, characterized in that: The discharge assembly includes a discharge pipe and a discharge valve. The discharge pipe is located below the metering tank, and the discharge valve is located on the discharge pipe.

8. The plasticizer weighing tank for waterproofing membrane production according to claim 1, characterized in that: The metering tank includes the tank body, the tank cone, and the tank cover; The can lid is located above the can body, and the can cone is located below the can body; The variable volume device and the feeding assembly are both located on the tank cover, while the discharge assembly is located on the tank cone.

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