Lifting aid adding device based on PVC (polyvinyl chloride) production
By designing a metering storage tank and a diversion hood to enhance the additive addition device, the problem of uneven distribution of additives in PVC production was solved, achieving accurate metering and uniform dispersion of additives, thereby improving production efficiency and product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XINJIANG HUATAI HEAVY CHEM CO LTD
- Filing Date
- 2025-05-30
- Publication Date
- 2026-05-15
AI Technical Summary
In PVC production, the addition of enhancing agents is concentrated in the same position inside the mixing device, which leads to the need for long-term and uneven mixing, increasing production time and product quality fluctuations.
A lifting additive addition device was designed, comprising a metering storage tank, an electric telescopic rod, a flow divider, fan blades, and a telescopic spring. By precisely controlling the amount of additive extracted and injected, the device achieves uniform flow and distribution of the additive, enhances the mixing effect, prevents leakage, and improves production controllability and product quality stability.
It achieves precise metering and uniform dispersion of additives, reduces the risk of leakage, improves the efficiency of PVC production and the stability of product quality, and reduces production time.
Smart Images
Figure CN224236743U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of additives for improving performance, specifically to additives for improving performance in PVC production. Background Technology
[0002] In the process of producing PVC resin, various raw materials for PVC resin production need to be mixed evenly in a certain proportion so that the mixed raw materials of PVC resin can be formed into PVC resin under the action of multiple processes. In order to ensure the uniformity of the mixing of PVC resin raw materials, a 70m³ polymerization reactor is usually used for processing.
[0003] The original design of the 70m³ polymerization reactor used the Goodrich production process, which has a quaternary dispersion system. During the preparation, the 72 system, the 55 system and cellulose were mixed together as dispersant one, and the 88 system was prepared alone as dispersant two. Because dispersant one is made up of two dispersants with different degrees of alcoholysis and cellulose, the uniformity after each preparation is different, resulting in large fluctuations in the resin particle index. Moreover, this preparation method is used in all reactors of this model in China, and the resin quality fluctuates greatly and is unstable.
[0004] The additive addition device in PVC production mainly includes storage and conveying devices, metering devices, premixing devices, and addition devices. Storage and conveying devices, such as storage tanks, screw conveyors, and pneumatic conveying systems, are used to store and transport additives to designated locations. Metering devices, including electronic scales and flow meters, are used to accurately control the amount of additives added. Premixing devices, such as premixing tanks and static mixers, ensure uniform dispersion of additives. Addition devices, such as metering pumps, spray guns or nozzles, and solid additive addition devices, are responsible for accurately adding additives to the PVC production process to improve product quality and performance. However, the addition of liquid additives is concentrated in the same position inside the mixing device, requiring the mixing device to perform long-term and uniform mixing, which increases the PVC production time. Therefore, to address the above problems, an additive addition device for PVC production is proposed. Utility Model Content
[0005] The purpose of this invention is to provide a device for adding enhancement additives in PVC production, so as to solve the problem that the addition of enhancement additives is concentrated in the same position inside the stirring device, which requires the stirring device to perform long-term and uniform stirring, thereby increasing the PVC production time.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A device for adding additives to PVC production includes a metering storage tank and a mounting cover. The mounting cover is fixedly connected to the upper end of the metering storage tank by bolts and nuts. An electric telescopic rod is fixedly connected to the outer side of the upper end of the mounting cover by bolts and nuts. A piston is fixedly connected to the end of the telescopic joint of the electric telescopic rod. A liquid extraction pipe is connected through the outer side of the metering storage tank. A liquid injection cone is fixedly connected to the lower end of the metering storage tank. A flow divider assembly is fixedly connected to the outer side of the liquid injection cone. The flow divider assembly includes a sealed bearing. A flow divider shroud is fixedly connected to the outer ring of the sealed bearing. A leak-blocking assembly is fixedly connected to the bottom inner side of the flow divider shroud. The leak-blocking assembly includes a fixed cylinder. A fan blade is fixedly connected to the outer side of the fixed cylinder. An auxiliary slip ring is slidably connected to the inner side of the fixed cylinder. A leak-blocking plug is fixedly connected to the upper end of the auxiliary slip ring. A telescopic spring is engaged at the lower end of the leak-blocking plug.
[0008] As a further optimization of this utility model, the telescopic joint of the electric telescopic rod is located inside the mounting cover and the metering storage tank. The piston connected to the electric telescopic rod slides close to the inner wall of the metering storage tank. The metering storage tank is provided with a metering scale on the outside. The liquid injection cone and the liquid extraction tube are both connected to the inside of the metering storage tank. A valve is provided in the middle section of the liquid extraction tube.
[0009] As a further optimization of this utility model, the following features are provided: a plurality of liquid flow holes are provided on the lower side and lower end of the flow divider; a drain hole located within the inner diameter range of the fixed cylinder is provided on the coaxial position of the flow divider and the fixed cylinder; and the diameter of the flow divider gradually decreases from the middle to both ends.
[0010] As a further optimization of this utility model, the fan blades are four in total, evenly distributed on the outside of the fixed cylinder, and located on the inside of the flow divider. Three retaining spring blocks are fixedly connected to the inside of the flow divider.
[0011] As a further optimization of this utility model, the telescopic spring is disposed inside the auxiliary slip ring, the telescopic spring is placed inside the fixed cylinder, the outer wall of the auxiliary slip ring is in close contact with the inner wall of the fixed cylinder, and the height of the auxiliary slip ring is 1.1 times the height of the telescopic spring protruding from the outer side of the fixed cylinder.
[0012] As a further optimization of this utility model, the upper part of the leak-blocking plug is embedded inside the injection cone tube, the side cross-section of the injection cone tube is a truncated cone shape, the lower side of the leak-blocking plug is provided with a groove for engaging the telescopic spring, and the maximum diameter of the leak-blocking plug is 1.2 times the outer diameter of the fixed cylinder.
[0013] As a further optimization of this utility model, the lower end of the telescopic spring is in close contact with the bottom of the inner side of the diversion shroud, the height of the telescopic spring protruding from the fixing cylinder is twice the thickness of the leak-proof plug, and the drain hole opened on the inner side of the diversion shroud is located within the lower end range of the telescopic spring.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] In this invention, the combination of a diversion hood, a fixed cylinder, fan blades, and a telescopic spring, along with an electric telescopic rod and piston, allows for precise control of the additive extraction and injection amounts. The metering scale on the outside of the metering storage tank facilitates real-time monitoring of the added amount, improving the controllability of the production process. The special design of the diversion hood enables the diversion and uniform distribution of the additive, enhancing the mixing effect between the additive and the material and improving product quality stability. The evenly distributed fan blades, positioned inside the diversion hood, enhance the rotational driving force of the hood, ensuring uniform dispersion of the additive and further improving mixing uniformity. The combination of the telescopic spring and auxiliary slip ring... The design carefully considers the dimensions and positional relationships to ensure a tight seal between the leak-blocking plug and the injection cone, preventing additive leakage. The cone-shaped side section of the injection cone allows the leak-blocking plug to tightly seal the lower opening, facilitating smooth movement of the additive during pushing and ensuring normal operation of the device. The coordination between the telescopic spring, the diversion hood, and the leak-blocking plug provides sufficient elastic force while ensuring the additive smoothly passes through the drain hole into the diversion hood and is evenly dispersed, improving injection efficiency and dispersion effect. The entire device has a reasonable structure, with each component working in tandem to effectively improve the accuracy of additive addition and dispersion effect, reducing the risk of leakage and significantly improving PVC production quality and efficiency. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0017] Figure 2 This is a schematic diagram of the mounting cover structure of this utility model;
[0018] Figure 3 This is a schematic diagram of the injection cone tube structure of this utility model;
[0019] Figure 4 This is a schematic diagram of the internal structure of the flow divider of this utility model;
[0020] Figure 5 This is a schematic diagram of the exploded structure of the leakage blocking component of this utility model;
[0021] Figure 6 This is a schematic diagram of the internal structure of the fixed cylinder of this utility model;
[0022] Figure 7 This is a schematic diagram of the cross-sectional structure of the flow divider of this utility model.
[0023] In the diagram: 1. Metering storage tank; 2. Mounting cover; 3. Electric telescopic rod; 4. Piston; 5. Suction pipe; 6. Injection cone;
[0024] 7. Flow divider assembly; 71. Sealed bearing; 72. Flow divider cover;
[0025] 73. Leakage prevention assembly; 731. Fixing cylinder; 732. Fan blade; 733. Auxiliary slip ring; 734. Leakage prevention plug; 735. Telescopic spring. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0027] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0028] Please see Figure 1-7 This utility model provides a technical solution:
[0029] The device for adding additives to PVC production includes a metering storage tank 1 and a mounting cover 2. The mounting cover 2 is fixedly connected to the upper end of the metering storage tank 1 by bolts and nuts. An electric telescopic rod 3 is fixedly connected to the outer side of the upper end of the mounting cover 2 by bolts and nuts. A piston 4 is fixedly connected to the end of the telescopic joint of the electric telescopic rod 3. A liquid extraction pipe 5 is connected through the outer side of the metering storage tank 1. An injection cone pipe 6 is fixedly connected to the lower end of the metering storage tank 1. A diversion assembly 7 is fixedly connected to the outer side of the injection cone pipe 6. The diversion assembly 7 includes a sealed bearing 71. A diversion hood 72 is fixedly connected to the outer side of the outer ring of the sealed bearing 71. A leak-blocking assembly 73 is fixedly connected to the bottom inner side of the diversion hood 72. The leak-blocking assembly 73 includes a fixed cylinder 731. A fan blade 732 is fixedly connected to the outer side of the fixed cylinder 731. An auxiliary slip ring 733 is slidably connected to the inner side of the fixed cylinder 731. A leak-blocking plug 734 is fixedly connected to the upper end of the auxiliary slip ring 733. A telescopic spring 735 is engaged at the lower end of the leak-blocking plug 734.
[0030] As a further implementation of this solution, the telescopic joint of the electric telescopic rod 3 is located inside the mounting cover 2 and the metering storage tank 1. The piston 4 connected to the electric telescopic rod 3 slides close to the inner wall of the metering storage tank 1. The metering storage tank 1 is provided with a metering scale on the outside. The injection cone tube 6 and the extraction tube 5 are both connected to the inside of the metering storage tank 1. The extraction tube 5 is provided with a valve in the middle section, which can realize the accurate metering and extraction of the additives, effectively ensuring the accuracy of the amount of additives added and improving the controllability of the production process. At the same time, the valve in the middle section of the extraction tube 5 can conveniently control the extraction process and prevent the additives from leaking when not in use.
[0031] As a further implementation of this solution, the lower side and lower end of the diversion hood 72 are provided with several liquid flow holes. The diversion hood 72 and the fixed cylinder 731 are coaxially positioned with a drain hole located within the inner diameter range of the fixed cylinder 731. The diameter of the diversion hood 72 gradually decreases from the middle to both ends, which helps to achieve diversion and uniform distribution when the additive is discharged, so that the additive can be more evenly dispersed in the PVC production mixing device, improve the mixing effect of the additive, and enhance the stability of product quality.
[0032] As a further implementation of this solution, there are four fan blades 732. The fan blades 732 are evenly distributed on the outside of the fixed cylinder 731 and are set on the inside of the flow divider 72. Three locking blocks for limiting the extension springs 735 are fixedly connected to the inside of the flow divider 72. This layout helps to enhance the rotational driving force of the flow divider 72 under the hydraulic action of the additives, so that the fan blades 732 can stably and effectively drive the flow divider 72 to rotate, thereby achieving uniform dispersion of the additives and further improving the mixing uniformity of the additives and PVC production materials.
[0033] As a further implementation of this solution, the telescopic spring 735 is set inside the auxiliary slip ring 733 and is placed inside the fixed cylinder 731. The outer wall of the auxiliary slip ring 733 is in close contact with the inner wall of the fixed cylinder 731. The height of the auxiliary slip ring 733 is 1.1 times the height of the telescopic spring 735 protruding from the outer side of the fixed cylinder 731. This size and positional relationship is conducive to the smooth movement of the leak-blocking plug 734 under pressure, while ensuring that the telescopic spring 735 can provide stable elastic support for the leak-blocking plug 734, ensuring the sealing performance between the leak-blocking plug 734 and the injection cone tube 6, and preventing the additive from leaking when the device is not started to add the additive.
[0034] As a further implementation of this solution, the upper part of the leak-blocking plug 734 is embedded inside the injection cone tube 6. The side cross-section of the injection cone tube 6 is a truncated cone shape. The lower side of the leak-blocking plug 734 is provided with a groove for engaging the telescopic spring 735. The maximum diameter of the leak-blocking plug 734 is 1.2 times the outer diameter of the fixed cylinder 731. The truncated cone shape side cross-section design of the injection cone tube 6 enables the leak-blocking plug 734 to tightly seal the lower opening of the injection cone tube 6, effectively preventing the leakage of the additive when the electric telescopic rod 3 is working. At the same time, when the additive is pushed into the injection cone tube 6, the leak-blocking plug 734 can move smoothly under pressure to achieve normal discharge of the additive and ensure the normal operation of the device.
[0035] As a further implementation of this solution, the lower end of the telescopic spring 735 is in close contact with the bottom of the inner side of the diversion shroud 72. The height of the telescopic spring 735 protruding from the fixed cylinder 731 is twice the thickness of the leak-proof plug 734. The drain hole opened on the inner side of the diversion shroud 72 is located within the lower end range of the telescopic spring 735. This structural design ensures that the telescopic spring 735 can provide sufficient elastic force for the leak-proof plug 734, and also allows the additive to smoothly enter the diversion shroud 72 through the drain hole during the discharge process, and to be evenly dispersed under the action of the rotation of the diversion shroud 72, thereby improving the injection efficiency and dispersion effect of the additive.
[0036] Workflow: When using this additive addition device in PVC production, the device can be installed at the upper shaft of the stirring device in the PVC production unit. Then, it is connected to the liquid tank of the PVC production lifting additive via the extraction pipe 5. The valve on the extraction pipe 5 is then opened to energize the electric telescopic rod 3. This causes the telescopic joint of the electric telescopic rod 3 to retract inside the metering storage tank 1. At this time, the lower opening of the injection cone pipe 6, which is fixedly connected to the lower end of the metering storage tank 1, is blocked by the leak-proof plug 734. Consequently, the piston 4, fixedly connected to the end of the telescopic joint of the electric telescopic rod 3, slides upwards from the bottom of the metering storage tank 1, reaching the lowest point of the metering storage tank 1. The extraction pipe 5, which connects to the liquid tank of the lifting additive, is then positioned at this point. Under the action of inner sliding, the liquid lifting agent in the liquid tank is drawn into the inner side of the metering storage tank 1. After the amount of lifting agent drawn and stored in the inner side of the metering storage tank 1 reaches a certain amount, the retraction of the electric telescopic rod 3 can be stopped, and the valve in the middle section of the liquid extraction pipe 5 can be closed. Then, when it is necessary to add the lifting agent stored in the inner side of the metering storage tank 1 to the mixing device of PVC production, the electric telescopic rod 3 is started, so that the telescopic joint of the electric telescopic rod 3 extends. The telescopic joint of the electric telescopic rod 3 drives the piston 4 to slide inside the metering storage tank 1, and pushes the lifting agent inside the metering storage tank 1 into the injection cone tube 6. During the process of the lifting agent being pushed into the injection cone tube 6, it is subjected to pressure by the conical structure of the injection cone tube 6. The lifting agent passing through the injection cone 6 has a strong pressure. At this time, the lifting agent gradually discharged from the injection cone 6 exerts a thrust on the leak-blocking plug 734 at the end of the injection cone 6, causing the leak-blocking plug 734 to exert a compressive force on the telescopic spring 735 connected below it. Simultaneously, the auxiliary slip ring 733 fixedly connected to the lower end of the leak-blocking plug 734 slides within the fixed cylinder 731 fixedly connected inside the diversion shroud 72, ensuring that the leak-blocking plug 734 always has vertical mobility. As the leak-blocking plug 734 moves under pressure towards the fixed cylinder 731, the lifting agent in the metering storage tank 1 can be discharged from the injection cone 6 and directly acts on the fan blade 732 fixedly connected to the outside of the fixed cylinder 731, thereby further discharging the lifting agent from the injection cone 6. Under the hydraulic force of the boosting agent output from the cone tube 6, the fan blades 732 on the outside of the fixed cylinder 731 are all driven by the force. Since the diversion hood 72 is fixedly connected to the outside of the injection cone tube 6 through the sealed bearing 71, the fan blades 732 can drive the diversion hood 72 to rotate on the outside of the injection cone tube 6 through the fixed cylinder 731. The rotation of the diversion hood 72 driven by the fan blades 732 allows the boosting agent filled in the diversion hood 72 to be evenly distributed from the liquid flow holes opened in the diversion hood 72 into the PVC production mixing device. The operator can monitor the metering of the boosting agent injected into the PVC production mixing device in real time through the scale set on the outside of the transparent metering storage tank 1, and accurately control the start and stop of the electric telescopic rod 3.
[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A device for adding booster agents for PVC production, comprising a metering storage tank (1) and a mounting cover (2), characterized in that: The metering storage tank (1) is fixedly connected to the upper end of the mounting cover (2) by bolts and nuts. The outer side of the upper end of the mounting cover (2) is fixedly connected to the electric telescopic rod (3) by bolts and nuts. The end of the telescopic joint of the electric telescopic rod (3) is fixedly connected to the piston (4). The outer side of the metering storage tank (1) is connected to the liquid extraction pipe (5). The lower end of the metering storage tank (1) is fixedly connected to the liquid injection cone pipe (6). The outer side of the liquid injection cone pipe (6) is fixedly connected to the diversion assembly (7). The flow divider assembly (7) includes a sealed bearing (71), a flow divider cover (72) is fixedly connected to the outer side of the outer ring of the sealed bearing (71), and a leak-proof assembly (73) is fixedly connected to the bottom of the inner side of the flow divider cover (72). The leak-blocking assembly (73) includes a fixed cylinder (731), a fan blade (732) is fixedly connected to the outside of the fixed cylinder (731), an auxiliary slip ring (733) is slidably connected to the inside of the fixed cylinder (731), a leak-blocking plug (734) is fixedly connected to the upper end of the auxiliary slip ring (733), and a telescopic spring (735) is engaged at the lower end of the leak-blocking plug (734).
2. The device for adding boosting agents based on PVC production according to claim 1, characterized in that: The telescopic joint of the electric telescopic rod (3) is located inside the mounting cover (2) and the metering storage tank (1). The piston (4) connected to the electric telescopic rod (3) slides close to the inner wall of the metering storage tank (1). The metering storage tank (1) has a metering scale on its outer side. The injection cone (6) and the extraction pipe (5) are both connected to the inner side of the metering storage tank (1). The extraction pipe (5) has a valve in the middle section.
3. The device for adding boosting agents based on PVC production according to claim 1, characterized in that: The flow divider (72) has several liquid flow holes on its lower side and lower end. The flow divider (72) and the fixed cylinder (731) are coaxially aligned with each other and have drainage holes located within the inner diameter range of the fixed cylinder (731). The diameter of the flow divider (72) gradually decreases from the middle to both ends.
4. The device for adding boosting agents based on PVC production according to claim 1, characterized in that: There are four fan blades (732). The fan blades (732) are evenly distributed on the outside of the fixed cylinder (731). The fan blades (732) are set on the inside of the diverter (72). Three locking blocks for limiting telescopic springs (735) are fixedly connected to the inside of the diverter (72).
5. The device for adding boosting agents based on PVC production according to claim 1, characterized in that: The telescopic spring (735) is located inside the auxiliary slip ring (733). The telescopic spring (735) is located inside the fixed cylinder (731). The outer wall of the auxiliary slip ring (733) is in close contact with the inner wall of the fixed cylinder (731). The height of the auxiliary slip ring (733) is 1.1 times the height of the telescopic spring (735) protruding from the outer side of the fixed cylinder (731).
6. The device for adding boosting agents based on PVC production according to claim 1, characterized in that: The upper part of the leak-blocking plug (734) is embedded inside the injection cone tube (6). The side cross section of the injection cone tube (6) is a cone-shaped truncated cone. The lower side of the leak-blocking plug (734) is provided with a slot for engaging the telescopic spring (735). The maximum diameter of the leak-blocking plug (734) is 1.2 times the outer diameter of the fixed cylinder (731).
7. The device for adding boosting agents based on PVC production according to claim 1, characterized in that: The lower end of the telescopic spring (735) is in close contact with the bottom of the inner side of the diversion shroud (72). The height of the telescopic spring (735) protruding from the fixed cylinder (731) is twice the thickness of the leak-proof plug (734). The drain hole opened on the inner side of the diversion shroud (72) is located within the lower end range of the telescopic spring (735).