Solid PVDF (Polyvinylidene Fluoride) powdery material conveying equipment

Abstract

The utility model relates to the technology of chemical production equipment, and discloses solid PVDF (Polyvinylidene Fluoride) powdery material conveying equipment which comprises a stock bin, a first-stage balance feeding conveyor, a second-stage quantitative continuous conveyor and a third-stage quantitative extrusion type long-distance heating and pressurizing conveyor, two third conveying shafts in an extrusion material conveying chamber of the three-stage quantitative extrusion type long-distance heating and pressurizing conveyor are arranged in parallel, two three-stage conveying spiral blades are tightly meshed, and a heating chamber is located below the extrusion material conveying chamber. The stock bin is connected with a first-stage balanced feeding conveyor, the first-stage balanced feeding conveyor is connected with a second-stage quantitative continuous conveyor, the second-stage quantitative continuous conveyor is connected with a third-stage quantitative extrusion type long-distance heating and pressurizing conveyor, and the third-stage quantitative extrusion type long-distance heating and pressurizing conveyor is connected with a cooling and drying chamber through a conveying pipe; a cooling water inlet pipe and a cooling water outlet pipe are arranged on the cooling and drying chamber, a powerful blower is installed on one side of the cooling and drying chamber, an air outlet is arranged above the cooling and drying chamber, and the cooling and drying chamber is connected with a storage bin.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical production equipment, and more specifically, particularly to a solid PVDF powder material conveying equipment. Background Art

[0002] Polyvinylidene fluoride, referred to as PVDF, is a highly non-reactive thermoplastic fluorine-containing polymer that can be synthesized through the polymerization reaction of 1,1-difluoroethylene. It is soluble in strong polar solvents such as dimethylacetamide. It has excellent properties such as anti-aging, chemical resistance, weather resistance, and ultraviolet radiation resistance. It can be used as engineering plastics, used to make sealing rings, corrosion-resistant equipment, capacitors, and also used as coatings, insulating materials, and ion exchange membrane materials. The solid, liquid, and solid shaping transformations are achieved through mechanized, continuous, and quantitative conveying of solid powder materials, accompanied by zoned heating and cooling shaping processes. The control error between each process must not exceed the physical property change point, and the feeding and storage must not be intermittent or stacked. Therefore, a solid PVDF powder material conveying equipment is needed to solve the above problems. Utility Model Content

[0003] The present application provides a solid PVDF powder material conveying device, which solves the problem that the existing equipment cannot control the error between each process to not exceed the physical property change point, and there will be intermittent and piled stacking during feeding and storage.

[0004] The present application provides a solid PVDF powder material conveying equipment, including a silo, a primary balanced feeding conveyor, a secondary quantitative continuous conveyor, and a tertiary quantitative extrusion long-distance heating and pressurizing conveyor;

[0005] The first-stage balanced feeding conveyor is composed of a first-stage conveying spiral blade, a motor and a conveying shaft;

[0006] The two-stage quantitative continuous conveyor is composed of two-stage conveying spiral blades, a second motor and a second conveying shaft;

[0007] The three-stage quantitative extrusion type long-distance heating and pressurizing conveyor is composed of two three-stage conveying spiral blades, a steam inlet, a steam outlet, a motor three, an extrusion conveying chamber, a heating chamber and two conveying shafts three. The two conveying shafts three in the extrusion conveying chamber are arranged in parallel, the two three-stage conveying spiral blades are tightly meshed, and the heating chamber is located below the extrusion conveying chamber;

[0008] The discharge port at the bottom of the silo is connected to the feed port of the first-level balanced feeding conveyor, the discharge port of the first-level balanced feeding conveyor is connected to the feed port of the second-level quantitative continuous conveyor, the discharge port of the second-level quantitative continuous conveyor is connected to the feed port of the third-level quantitative extrusion type long-distance heating and pressurizing conveyor, the third-level quantitative extrusion type long-distance heating and pressurizing conveyor is connected to a cooling and drying chamber through a feed pipe, a cooling water inlet pipe and a cooling water outlet pipe are provided on the cooling and drying chamber, a powerful hair dryer is installed on one side of the cooling and drying chamber, an air outlet is provided above the cooling and drying chamber, and the cooling and drying chamber is connected to a storage silo through a discharge pipe.

[0009] Preferably, the heating chamber is divided into a heating zone, each of the heating zones is provided with the steam inlet and the steam outlet, and each of the heating zones is provided with a temperature sensor.

[0010] Preferably, a temperature sensor is provided in the cooling and drying chamber.

[0011] Preferably, a filter is installed at the connection between the cooling and drying chamber and the cooling water outlet pipe.

[0012] Preferably, a discharge valve is installed on the discharge pipe.

[0013] Preferably, a metering instrument is provided at the bottom of the storage bin.

[0014] It can be seen from the above technical scheme that the present application provides a solid-state PVDF powder material conveying equipment, and conducts transportation research on solid-state PVDF powder materials. The powder material enters the first-stage balanced feeding conveyor through the silo, passes through the second-stage quantitative continuous conveyor, and enters the third-stage quantitative extrusion-type long-distance heating and pressurizing conveyor. The two conveying shafts in the extrusion feeding chamber are arranged in parallel, and the three-stage conveying spiral blades on the two conveying shafts are tightly meshed and move in the same direction. The powder material is quantitatively extruded and pressurized for a long distance. When the powder enters the third-stage conveyor, the material needs to be heated. According to the conveying speed of the material, the three-stage conveying spiral is heated in zones, and it needs to be divided into eleven zones for heating. PVDF product is a polymer product and cannot be reversibly reduced. Its product melting point is about 171°C, and precise temperature change control is required to achieve the solid-to-liquid conversion requirements of the material. A steam inlet and a steam outlet are provided on each heating zone of the heating chamber to heat the powder material in zones to improve the heating Efficiency, when the material converted into liquid in the three-stage quantitative extrusion long-distance heating and boosting conveyor enters the cooling and drying chamber through the feed pipe, the granular material needs to be rapidly separated and cooled when the material is formed, and pure constant temperature cooling water is selected to enter the cooling and drying chamber from the cooling water inlet pipe for cooling. The water volume should not be too large or too small. If it is too large, the forming effect will be poor, and if it is too small, a series of particles will appear. In severe cases, the cooling section will be blocked by material adhesion. After cooling, the excess cooling water in the granular material will be separated and discharged from the cooling water outlet pipe, and then the granular material in the cooling and drying chamber will be dried. The granular material must not exceed 40°C, otherwise the material will accumulate and discolor and cannot be used. A strong hair dryer is installed on the side wall of the cooling and drying chamber to dry the granular material with natural wind. The dried granular material enters the storage bin through the discharge pipe for storage. A metering instrument is provided at the bottom of the storage bin to measure the granular material entering the storage bin, because the granular material cannot be stored in excess, and excessive storage will cause qualitative changes.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model is provided with a first-level balanced feeding conveyor, a second-level quantitative continuous conveyor and a third-level quantitative extrusion long-distance heating and pressurizing conveyor, which realizes the solid, liquid and solid stereotyped transformation through mechanized, continuous and quantitative conveying of solid powder materials, so that the control error between each process shall not exceed the physical property change point and no discontinuity and accumulation of stacking will occur.

[0017] 2. The three-stage conveying spiral blade of the utility model not only meets the requirements of continuous conveying of materials, but also meets the requirements of pressurized heating and pressurized liquid conveying of materials, achieving the requirements of uninterrupted continuous conveying when the solid-liquid state of the materials is transformed.

[0018] 3. The utility model is provided with a cooling and drying chamber, and the granular materials are rapidly separated and cooled when the materials are formed. Pure constant temperature cooling water is used for cooling, and a valve is provided on the cooling water inlet pipe to control the water volume so as not to be too large or too small, so as to prevent poor forming effect due to excessive water volume, and the appearance of a series of particles due to excessive water volume, so as to avoid adhesion and blockage of materials in the cooling section.

[0019] 4. The utility model provides a metering instrument at the bottom of the storage bin to measure the granular materials entering the storage bin to avoid excessive storage of granular materials, which will cause quality changes.

[0020] In summary, a solid PVDF powder material conveying equipment is provided with a first-level balanced feeding conveyor, a second-level quantitative continuous conveyor and a third-level quantitative extrusion long-distance heating and pressurizing conveyor. The solid powder material is conveyed in a mechanized, continuous and quantitative manner to realize the solid, liquid and solid-state stereotyped transformation, so that the control error between each process shall not exceed the physical property change point while no discontinuity and accumulation stacking will occur. The three-level conveying spiral blades not only meet the continuous conveying of the material, but also meet the pressurized heating and pressurized liquid conveying of the material, so as to achieve the requirement of uninterrupted continuous conveying when the material is transformed from solid to liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without inventiveness.

[0022] Figure 1 This is a structural schematic diagram of a solid PVDF powder material conveying device provided by the utility model;

[0023] Figure 2 This is a structural schematic diagram of an extrusion feeding chamber of a solid PVDF powder material conveying device provided by the utility model;

[0024] Figure 3 The utility model provides a structural schematic diagram of a filter screen for solid PVDF powder material conveying equipment.

[0025] The reference numerals in the specific implementation manner are as follows:

[0026] 1. Silo; 2. One-stage balanced feeding conveyor; 201. One-stage conveying spiral blade; 202. Motor one; 203. Conveying shaft one; 3. Two-stage quantitative continuous conveyor; 301. Two-stage conveying spiral blade; 302. Motor two; 303. Conveying shaft two; 4. Three-stage quantitative extrusion long-distance heating and boosting conveyor; 401. Three-stage conveying spiral blade; 402. Steam inlet; 403. Steam outlet; 404. Motor three; 405. Extrusion feeding chamber; 406. Heating chamber; 407. Conveying shaft three; 5. Temperature sensor; 6. Feed pipe; 7. Cooling and drying chamber; 8. Cooling water inlet pipe; 9. Cooling water outlet pipe; 10. Filter; 11. Powerful hair dryer; 12. Air outlet; 13. Discharge pipe; 14. Discharge valve; 15. Storage silo; 16. Measuring instrument. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0028] See also Figure 1-3 , a solid PVDF powder material conveying equipment. In order to solve the problem that the existing equipment cannot control the error between each process to not exceed the physical property change point, and intermittent and piled stacking will occur during feeding and storage, this application proposes a solid PVDF powder material conveying equipment, which is equipped with a first-level balanced feeding conveyor, a second-level quantitative continuous conveyor and a third-level quantitative extrusion long-distance heating and pressurizing conveyor. The solid powder material is conveyed in a mechanized, continuous and quantitative manner to achieve the solid, liquid and solid-state stereotyped transformation, so that the control error between each process does not exceed the physical property change point and no discontinuity and piled stacking will occur. The three-stage conveying spiral blades not only meet the continuous conveying of the material, but also meet the pressurized heating and pressurized liquid conveying of the material, so as to achieve the requirement of uninterrupted continuous conveying when the material changes from solid to liquid.

[0029] Specifically, a solid PVDF powder material conveying equipment includes a silo 1, a first-level balanced feeding conveyor 2, a second-level quantitative continuous conveyor 3 and a third-level quantitative extrusion long-distance heating and pressurizing conveyor 4; the first-level balanced feeding conveyor 2 is composed of a first-level conveying spiral blade 201, a motor 202 and a conveying shaft 203; the second-level quantitative continuous conveyor 3 is composed of a second-level conveying spiral blade 301, a second motor 302 and a second conveying shaft 303; the third-level quantitative extrusion long-distance heating and pressurizing conveyor 4 is composed of two third-level conveying spiral blades The machine is composed of a sheet 401, a steam inlet 402, a steam outlet 403, a motor 404, an extrusion feeding chamber 405, a heating chamber 406 and two conveying shafts 407, and is provided with a first-level balanced feeding conveyor 2, a second-level quantitative continuous conveyor 3 and a third-level quantitative extrusion type long-distance heating boosting conveyor 4, which realizes the solid, liquid and solid stereotyped transformation through mechanized, continuous and quantitative conveying of solid powder materials, so that the control error between each process shall not exceed the physical property change point and no discontinuity and accumulation of stacking occurs; the extrusion feeding chamber 4 The two conveying shafts 407 in the extrusion conveying chamber 405 are arranged in parallel, and the two three-stage conveying spiral blades 401 are closely meshed. The heating chamber 406 is located below the extrusion conveying chamber 405. The heating chamber 406 is divided into a heating zone. Each heating zone is provided with a steam inlet 402 and a steam outlet 403. Each heating zone is provided with a temperature sensor 5. The two conveying shafts 407 in the extrusion conveying chamber 405 are arranged in parallel. The three-stage conveying spiral blades 401 on the two conveying shafts 407 are closely meshed and move in the same direction, which can quantitatively extrude and pressurize the powdered material over a long distance. When the powder enters the third-stage conveyor, the material needs to be heated. The speed of the motor 3 is set. According to the conveying speed of the material, the third-stage conveying screw is heated in zones. It needs to be divided into eleven zones for heating. The PVDF product is a polymer product that cannot be reversibly reduced. Its melting point is about 171°C. It is necessary to achieve the material's solid-to-liquid conversion requirements through precise temperature change control. A steam inlet 402 and a steam outlet 403 are set on each heating zone of the heating chamber 406 to heat the powdered material in zones to improve the heating efficiency.

[0030] The discharge port at the bottom of the silo 1 is connected to the feed port of the primary balanced feeding conveyor 2, the discharge port of the primary balanced feeding conveyor 2 is connected to the feed port of the secondary quantitative continuous conveyor 3, the discharge port of the secondary quantitative continuous conveyor 3 is connected to the feed port of the third-level quantitative extrusion type long-distance heating and pressurizing conveyor 4, the powdery material enters the primary balanced feeding conveyor 2 through the silo 1, passes through the secondary quantitative continuous conveyor 3, and enters the third-level quantitative extrusion type long-distance heating and pressurizing conveyor 4; the third-level quantitative extrusion type long-distance heating and pressurizing conveyor The conveyor 4 is connected to the cooling and drying chamber 7 through the conveying pipe 6. The cooling and drying chamber 7 is provided with a cooling water inlet pipe 8 and a cooling water outlet pipe 9. A filter screen 10 is installed at the connection between the cooling and drying chamber 7 and the cooling water outlet pipe 9. When the material converted into liquid in the three-stage quantitative extrusion long-distance heating and boosting conveyor 4 enters the cooling and drying chamber 7 through the conveying pipe 6, the granular material needs to be rapidly separated and cooled when the material is formed. Pure constant temperature cooling water is selected to enter the cooling and drying chamber 7 from the cooling water inlet pipe 8 for cooling, and the water volume is controlled not to be too large. If the size is too small, the forming effect will be poor; if the size is too small, a series of particles will appear. In severe cases, the cooling section will be blocked by adhesion of materials. After cooling, the excess cooling water in the granular material will be separated and discharged from the cooling water outlet pipe 9; a temperature sensor 5 is provided in the cooling and drying chamber 7, a powerful hair dryer 11 is installed on one side of the cooling and drying chamber 7, and an air outlet 12 is provided above the cooling and drying chamber 7 to dry the granular material in the cooling and drying chamber 7. The granular material shall not exceed a temperature of 40°C, otherwise the material will accumulate and discolor and cannot be used. A powerful hair dryer 11 is installed on the side wall of the cooling and drying chamber 7 to dry the granular material by natural wind; the cooling and drying chamber 7 is connected to a storage bin 15 through a discharge pipe 13, a discharge valve 14 is installed on the discharge pipe 13, and a metering instrument 16 is provided at the bottom of the storage bin 15. The dried granular material enters the storage bin 15 through the discharge pipe 13 for storage. A metering instrument 16 is provided at the bottom of the storage bin 15 to measure the granular material entering the storage bin 15, because the granular material cannot be stored in excess, and excessive storage will cause qualitative changes.

[0031] It can be seen from the above technical scheme that a solid PVDF powder material conveying equipment is used to study the conveying of solid PVDF powder materials. The powder material enters the first-level balanced feeding conveyor 2 through the silo 1, passes through the second-level quantitative continuous conveyor 3, and enters the third-level quantitative extrusion long-distance heating and pressurizing conveyor 4. The two conveying shafts 407 in the extrusion feeding chamber 405 are arranged in parallel, and the three-level conveying spiral blades 401 on the two conveying shafts 407 are tightly meshed and move in the same direction. The powder material is quantitatively extruded and pressurized for a long distance. When the powder enters the third-level conveyor, the material needs to be heated. According to the conveying speed of the material, the three-level conveying spiral is heated in different areas, and it needs to be divided into eleven areas for heating. The PVDF product is a polymer product that cannot be reversibly reduced. The melting point of the product is about 171°C. It is necessary to realize the solid-to-liquid transformation requirements of the material through precise temperature change control. A steam inlet 402 and a steam outlet 403 are set on each heating zone of the heating chamber 406 to heat the powder material in different areas to improve the heating efficiency. The rate is that when the material converted into liquid in the three-stage quantitative extrusion long-distance heating and boosting conveyor 4 enters the cooling and drying chamber 7 through the feeding pipe 6, the granular material needs to be rapidly separated and cooled when the material is formed, and pure constant temperature cooling water is selected to enter the cooling and drying chamber 7 from the cooling water inlet pipe 8 for cooling. The water volume should not be too large or too small. If it is too large, the forming effect is poor, and if it is too small, a series of particles will appear. In severe cases, the cooling section material will be blocked by adhesion. After cooling, the excess cooling water in the granular material is separated and discharged from the cooling water outlet pipe 9, and then the granular material in the cooling and drying chamber 7 is dried. The granular material shall not exceed 40°C, otherwise the material will accumulate and discolor and cannot be used. A strong hair dryer 11 is installed on the side wall of the cooling and drying chamber 7 to dry the granular material by natural wind. The dried granular material enters the storage bin 15 through the discharge pipe 13 for storage. A metering instrument 16 is provided at the bottom of the storage bin 15 to measure the granular material entering the storage bin 15, because the granular material cannot be stored in excess, and excessive storage will cause qualitative changes.

[0032] Those skilled in the art will readily come up with other embodiments of the present invention after considering the specification and practicing the application disclosed herein. The present invention is intended to cover any variation, use or adaptation of the present invention, which follows the general principles of the present invention and includes common knowledge or customary technical means in the art disclosed by the present invention. The specification and examples are to be regarded as exemplary only, and the true scope of the present invention is indicated by the claims.

[0033] It should be understood that the present invention is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The above-described embodiments of the present invention do not constitute a limitation on the scope of protection of the present invention.

Claims

1. A solid PVDF powder material conveying equipment, characterized in that: It comprises a material bin (1), a first-level balanced feeding conveyor (2), a second-level quantitative continuous conveyor (3) and a third-level quantitative extrusion-type long-distance heating and pressurizing conveyor (4); The first-stage balanced feeding conveyor (2) is composed of a first-stage conveying spiral blade (201), a motor (202) and a conveying shaft (203); The two-stage quantitative continuous conveyor (3) is composed of a two-stage conveying spiral blade (301), a second motor (302) and a second conveying shaft (303); The three-stage quantitative extrusion type long-distance heating and pressurizing conveyor (4) is composed of two three-stage conveying spiral blades (401), a steam inlet (402), a steam outlet (403), a motor three (404), an extrusion conveying chamber (405), a heating chamber (406) and two conveying shafts three (407), wherein the two conveying shafts three (407) in the extrusion conveying chamber (405) are arranged in parallel, the two three-stage conveying spiral blades (401) are tightly meshed, and the heating chamber (406) is located below the extrusion conveying chamber (405); The discharge port at the bottom of the silo (1) is connected to the feed port of the first-level balanced feeding conveyor (2), the discharge port of the first-level balanced feeding conveyor (2) is connected to the feed port of the second-level quantitative continuous conveyor (3), the discharge port of the second-level quantitative continuous conveyor (3) is connected to the feed port of the third-level quantitative extrusion type long-distance heating and pressurizing conveyor (4), the third-level quantitative extrusion type long-distance heating and pressurizing conveyor (4) is connected to a cooling and drying chamber (7) through a conveying pipe (6), the cooling and drying chamber (7) is provided with a cooling water inlet pipe (8) and a cooling water outlet pipe (9), a powerful hair dryer (11) is installed on one side of the cooling and drying chamber (7), an air outlet (12) is provided above the cooling and drying chamber (7), and the cooling and drying chamber (7) is connected to a storage bin (15) through a discharge pipe (13).

2. A solid PVDF powder material conveying device according to claim 1, characterized in that: The heating chamber (406) is divided into a heating zone, each of which is provided with a steam inlet (402) and a steam outlet (403), and each of which is provided with a temperature sensor (5).

3. The solid PVDF powder material conveying equipment according to claim 1, characterized in that: A temperature sensor (5) is provided in the cooling and drying chamber (7).

4. The solid PVDF powder material conveying equipment according to claim 1, characterized in that: A filter screen (10) is installed at the connection between the cooling and drying chamber (7) and the cooling water outlet pipe (9).

5. The solid PVDF powder material conveying equipment according to claim 1, characterized in that: A discharge valve (14) is installed on the discharge pipe (13).

6. The solid PVDF powder material conveying equipment according to claim 1, characterized in that: A measuring instrument (16) is provided at the bottom of the storage bin (15).

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