A screw pump discharging device for high temperature polyester resin liquid

Abstract

The utility model discloses a high temperature polyester resin liquid's screw pump discharge device, including discharge box and setting the feed mechanism of discharge box bottom, be provided with rotary discharge mechanism in the discharge chamber, the inner wall of discharge box is provided with the heating interlayer of the box body that surrounds the discharge chamber, is provided with first heating assembly in heating interlayer of the box body, and the feed mechanism includes cylindrical shell and sets up screw feed assembly in cylindrical shell, is provided with annular heating interlayer in cylindrical shell, is provided with second heating assembly in annular heating interlayer. The utility model provides high temperature polyester resin liquid's screw pump discharge device, and first heating assembly heats the discharge chamber, and second heating assembly heats the feed chamber, and the temperature in such discharge chamber and feed chamber all keeps higher than the melting point of polyester resin, makes polyester resin keep liquid state in discharge chamber and feed chamber, and the phenomenon of solidification will not appear.

Description

Technical Field

[0001] This utility model relates to the field of polyester resin production technology, and in particular to a screw pump discharge device for high-temperature polyester resin liquid. Background Technology

[0002] Definition and characteristics of polyester resin: Polyester resin is a polymer compound produced by the polycondensation reaction of diols or polyols with diacids or polyacids. Based on the different raw materials and synthesis processes, polyester resins can be divided into two main categories: saturated polyester resins and unsaturated polyester resins. Saturated polyester resins possess good flexibility, weather resistance, and chemical stability, and are often used to prepare high-performance coatings and engineering plastics. Unsaturated polyester resins, due to their double bond structure, can undergo cross-linking and curing under the action of an initiator, forming a three-dimensional network structure. They possess characteristics such as high strength, light weight, and corrosion resistance, and are the main raw material for manufacturing fiberglass products.

[0003] In the production process of polyester resin, it is usually necessary to transport the high-temperature, high-viscosity polyester resin liquid in the reactor to subsequent cooling, granulation, and blending processes to produce products that meet different application requirements. Because polyester resin has high viscosity and poor fluidity at high temperatures, and is prone to solidification during transportation due to temperature drop, traditional discharge devices have a small conveying flow rate when transporting polyester resin liquid, and the polyester resin liquid is very likely to gradually solidify inside the conveying equipment, causing blockages. Utility Model Content

[0004] The purpose of this invention is to provide a screw pump discharge device for high-temperature polyester resin liquid, so as to solve the above-mentioned shortcomings in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A screw pump discharge device for high-temperature polyester resin liquid includes a discharge box and a conveying mechanism disposed at the bottom of the discharge box. The discharge box is hollow inside and open at the top to form a discharge chamber. A rotary discharge mechanism is disposed inside the discharge chamber, and a discharge port is disposed at the bottom of the discharge chamber. A box heating jacket is disposed around the discharge chamber on the inner wall of the discharge box. A first heating component is disposed inside the box heating jacket. The conveying mechanism includes a cylindrical shell and a screw conveying component disposed inside the cylindrical shell. The two ends of the cylindrical shell are a feed end and a discharge end, respectively. The feed end is connected to the discharge port, and the discharge end is provided with a conveying opening. An annular heating jacket is disposed inside the cylindrical shell, and a second heating component is disposed inside the annular heating jacket.

[0007] The aforementioned screw pump discharge device includes a discharge box comprising an integrally formed rectangular box and an arc-shaped box located at the bottom of the rectangular box, with the discharge port located at the bottom of the arc-shaped box.

[0008] The aforementioned screw pump discharge device includes a rotary discharge mechanism comprising a rotary drive motor and a rotary rod connected to the rotary drive motor, the rotary rod being arranged transversely within the discharge chamber.

[0009] In the aforementioned screw pump discharge device, a plurality of agitators are provided on the rotating rod, and the plurality of agitators are arranged sequentially at intervals along the circumference and axis of the rotating rod.

[0010] In the aforementioned screw pump discharge device, the agitator includes an agitator rod fixedly mounted on the rotating rod, an agitator blade is provided at the end of the agitator rod away from the rotating rod, and an elastic scraper is provided on the side of the agitator blade away from the agitator rod.

[0011] The aforementioned screw pump discharge device also includes a filter element, which is disposed on the discharge port.

[0012] The aforementioned screw pump discharge device includes a screw conveying assembly comprising a drive unit and symmetrically arranged right-handed and left-handed screw components, which mesh with each other.

[0013] The aforementioned screw pump discharge device has a conveying chamber inside the cylindrical shell for mounting the right-hand screw and the left-hand screw. The conveying chamber has threaded grooves corresponding to the right-hand screw and the left-hand screw. The annular heating jacket surrounds the conveying chamber.

[0014] In the aforementioned screw pump discharge device, the second heating component includes a spiral heating tube disposed in the annular heating jacket, wherein the heating medium is conveyed in the opposite direction to the conveying direction of the high-temperature polyester resin liquid in the conveying chamber.

[0015] In the above technical solution, the screw pump discharge device for high-temperature polyester resin liquid provided by this utility model includes a discharge box and a cylindrical shell connected in sequence. A rotary discharge mechanism is provided in the discharge chamber. A box heating jacket surrounding the discharge chamber is provided on the inner wall of the discharge box. A first heating component is provided in the box heating jacket. A screw conveying component is provided in the cylindrical shell. An annular heating jacket is provided in the cylindrical shell. A second heating component is provided inside the annular heating jacket. During use, the first heating component heats the discharge chamber, and the second heating component heats the conveying chamber. In this way, the temperature in both the discharge chamber and the conveying chamber is kept higher than the melting point of the polyester resin, so that the polyester resin remains in a liquid state in both the discharge chamber and the conveying chamber and does not solidify. Moreover, the rotary discharge mechanism can stir and clean the polyester resin in the discharge box, preventing the polyester resin from accumulating and remaining on the inner wall of the discharge box. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 A front view of the screw pump discharge device for high-temperature polyester resin liquid provided in an embodiment of this utility model;

[0018] Figure 2 A schematic diagram of the internal structure of the screw pump discharge device for high-temperature polyester resin liquid provided in an embodiment of this utility model.

[0019] Figure 3 This is a schematic diagram of the structure of the screw conveyor assembly provided in an embodiment of the present utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the elastic scraper provided in an embodiment of the present invention.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Discharge box; 11. Discharge chamber; 12. Discharge port; 13. Heating jacket of the box body; 14. First heating component; 15. Rectangular box body; 16. Arc-shaped box body; 17. Filter element; 2. Rotary discharge mechanism; 21. Rotary drive motor; 22. Rotating rod; 23. Stirring component; 24. Stirring rod; 25. Stirring blade; 26. Elastic scraper; 261. Columnar body; 262. Connecting column; 263. Sliding plate; 264. Spring component; 265. Mounting through hole; 3. Conveying mechanism; 31. Columnar shell; 311. Feed end; 312. Discharge end; 32. Screw conveying component; 321. Drive unit; 322. Right-hand screw component; 323. Left-hand screw component; 33. Conveying opening; 34. Annular heating jacket; 35. Second heating component; 351. Spiral heating tube; 36. Conveying chamber. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0024] like Figure 1-4 As shown, this utility model provides a screw pump discharge device for high-temperature polyester resin liquid, including a discharge box 1 and a conveying mechanism 3 disposed at the bottom of the discharge box 1. The discharge box 1 is hollow inside and open at the top to form a discharge chamber 11. A rotary discharge mechanism 2 is disposed inside the discharge chamber 11. A discharge port 12 is disposed at the bottom of the discharge chamber 11. A box heating jacket 13 is disposed around the discharge chamber 11 on the inner wall of the discharge box 1. A first heating component 14 is disposed inside the box heating jacket 13. The conveying mechanism 3 includes a cylindrical shell 31 and a screw conveying component 32 disposed inside the cylindrical shell 31. The two ends of the cylindrical shell 31 are a feed end 311 and a discharge end 312, respectively. The feed end 311 is connected to the discharge port 12. The discharge end 312 is provided with a conveying opening 33. An annular heating jacket 34 is disposed inside the cylindrical shell 31. A second heating component 35 is disposed inside the annular heating jacket 34.

[0025] Specifically, the discharge box 1 and the cylindrical shell 31 are integrally formed. The cylindrical shell 31 is located at the bottom of the discharge box 1. The discharge box 1 is hollow inside and open at the top to form a discharge chamber 11. The discharge chamber 11 can receive the high-temperature polyester resin liquid transported by the reactor. A discharge port 12 is provided at the bottom of the discharge chamber 11. The two ends of the cylindrical shell 31 are the inlet end 311 and the outlet end 312, respectively. A cylindrical conveying chamber 36 is formed inside the cylindrical shell 31. The discharge port 12 is connected to the conveying chamber 36, thereby enabling... The discharge chamber 1 receives high-temperature polyester resin liquid from the discharge box 1. The inner wall of the discharge box 1 is equipped with a heating jacket 13 surrounding the discharge chamber 11. A first heating component 14 is installed within the heating jacket 13. The first heating component 14 can use electric heating or steam heating to heat the discharge chamber 11, maintaining it at a suitable temperature. The temperature inside the discharge chamber 11 is higher than the melting point of the polyester resin, ensuring the polyester resin delivered to the conveying chamber 36 remains at a high temperature and effectively preventing curing. A rotary discharge mechanism 2 is installed inside the discharge chamber 11. The rotary discharge mechanism 2 has two functions: first, it can stir the high-temperature polyester resin liquid inside the discharge chamber 11, ensuring a uniform temperature; second, it can move along the inner wall of the discharge chamber 11, scraping away any accumulated or residual raw material, preventing the high-temperature polyester resin liquid from accumulating or remaining on the inner wall of the discharge chamber 11.

[0026] In this embodiment, a screw conveying assembly 32 is provided inside the cylindrical shell 31. The screw conveying assembly 32 can be a single screw pump or a twin screw pump. The discharge end 312 of the cylindrical shell 31 is provided with a conveying opening 33, through which the high-temperature polyester resin liquid inside the cylindrical shell 31 can be output. An annular heating jacket 34 is provided inside the cylindrical shell 31, and a second heating assembly 35 is provided inside the annular heating jacket 34. The first heating assembly 14 can use electric heating or steam heating to heat the conveying chamber 36, so that the conveying chamber 36 is maintained at a suitable temperature. Temperature detection devices are provided in both the discharge chamber 11 and the conveying chamber 36 to detect the temperature in the discharge chamber 11 and the conveying chamber 36. Thus, during use, the first heating assembly 14 and the second heating assembly 35 are controlled by a control device (such as a PLC) to make the first heating assembly 14 and the second heating assembly 35 work to heat the discharge chamber 11 and the conveying chamber 36.

[0027] The high-temperature polyester resin liquid screw pump discharge device provided by this utility model includes a discharge box 1 and a cylindrical shell 31 connected in sequence. A rotary discharge mechanism 2 is provided in the discharge chamber 11. A box heating jacket 13 is provided around the inner wall of the discharge chamber 11. A first heating component 14 is provided in the box heating jacket 13. A screw conveying component 32 is provided in the cylindrical shell 31. An annular heating jacket 34 is provided in the cylindrical shell 31. A second heating component 3 is provided inside the annular heating jacket 34. 5. During use, the first heating component 14 heats the discharge chamber 11, and the second heating component 35 heats the conveying chamber 36. In this way, the temperature in both the discharge chamber 11 and the conveying chamber 36 is kept higher than the melting point of the polyester resin, so that the polyester resin remains in a liquid state in both the discharge chamber 11 and the conveying chamber 36 and does not solidify. In addition, the rotating discharge mechanism 2 can stir and clean the polyester resin in the discharge box 1, preventing the polyester resin from accumulating and remaining on the inner wall of the discharge box 1.

[0028] In this embodiment, preferably, the discharge box 1 includes an integrally formed rectangular box 15 and an arc-shaped box 16 disposed at the bottom of the rectangular box 15. The discharge port 12 is disposed at the bottom of the arc-shaped box 16. The size of the arc-shaped box 16 is corresponding to that of the rotating discharge mechanism 2, so that the rotating discharge mechanism 2 can perform scraping operation on the arc-shaped inner wall of the arc-shaped box 16.

[0029] In this embodiment, preferably, the rotary discharge mechanism 2 includes a rotary drive motor 21 and a rotary rod 22 connected to the rotary drive motor 21. The rotary rod 22 is arranged transversely in the discharge chamber 11. Driven by the rotary drive motor 21, the rotary rod 22 can rotate inside the discharge chamber 11. Multiple stirring elements 23 are provided on the rotary rod 22. The multiple stirring elements 23 are arranged sequentially and spaced apart along the circumference and axis of the rotary rod 22. The stirring element 23 includes a stirring rod 24 fixedly installed on the rotary rod 22. A stirring blade 25 is provided at the end of the stirring rod 24 away from the rotary rod 22. That is, multiple stirring elements 23 are arranged sequentially and spaced apart along the axial direction of the rotary rod 22, and the distance between the stirring elements 23 corresponds to the length of the stirring blade 25, so that the multiple stirring elements 23 can perform scraping operation to fully cover the arc-shaped inner wall of the discharge chamber 11.

[0030] An elastic scraper 26 is provided on the side of the stirring blade 25 away from the stirring rod 24. The elastic scraper 26 includes a cylindrical body 261 of the same length as the stirring blade 25. A connecting post 262 is provided on the cylindrical body 261. A mounting through hole 265 is provided on the side of the stirring blade 25. A sliding piece 263 is provided at the end of the connecting post 262. The sliding piece 263 is restricted to sliding within the mounting through hole 265. An annular baffle is provided at the opening of the mounting through hole 265 to prevent the sliding piece 263 from sliding out of the mounting through hole 265. A spring 264 is provided within the mounting through hole 265. One end of spring 264 is fixedly connected to the bottom wall of mounting through hole 265, and the other end of spring 264 is connected to sliding plate 263. When rotating rod 22 is driven to rotate, stirring rod 24 and stirring blade 25 rotate, and cylindrical body 262 moves against the arc-shaped inner wall of discharge chamber 11, thereby scraping off polyester resin on the arc-shaped inner wall of discharge chamber 11. When cylindrical body 262 encounters greater resistance and is pressed, connecting column 262 moves into the mounting through hole 265, thereby increasing the distance between cylindrical body 262 and arc-shaped inner wall of discharge chamber 11, and avoiding damage to connecting column.

[0031] In this embodiment, preferably, a filter element 17 is also included. The filter element 17 is disposed on the discharge port 12. The filter element 17 allows the high-temperature polyester resin liquid to pass through while retaining the solid polyester resin, preventing the solid polyester resin from being transported into the conveying chamber 36. During the rotation of the elastic scraper 26 and the stirring blade 25, the polyester resin on the filter element 17 can be cleaned.

[0032] In this embodiment, preferably, the screw conveying assembly 32 includes a drive unit 321 and symmetrically arranged right-hand screw 322 and left-hand screw 323. The right-hand screw 322 and left-hand screw 323 mesh with each other. A conveying chamber 36 for mounting the right-hand screw 322 and left-hand screw 323 is provided inside the cylindrical shell 31. The conveying chamber 36 is provided with threaded grooves corresponding to the right-hand screw 322 and left-hand screw 323. The right-hand screw 322, left-hand screw 323 and threaded grooves form a continuous sealed conveying chamber. An annular heating jacket 34 is arranged around the conveying chamber 36.

[0033] In this embodiment, preferably, the second heating component 35 includes a spiral heating tube 351 disposed in the annular heating jacket 34. The conveying direction of the heating medium along the spiral heating tube 351 is opposite to the conveying direction of the high-temperature polyester resin liquid in the conveying chamber 36. A heating medium inlet is provided at the discharge end 312 of the cylindrical shell 31, and a heating medium outlet is provided at the feed end 311 of the cylindrical shell 31. Both the heating medium inlet and the heating medium outlet are connected to the spiral heating tube 351. Thus, during use, the heating medium is conveyed from the heating medium inlet to the spiral heating tube 351 through the heating device, and returned from the heating medium outlet to the heating device.

[0034] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A screw pump discharge device for high-temperature polyester resin liquid, characterized in that, The device includes a discharge box and a conveying mechanism located at the bottom of the discharge box. The discharge box is hollow inside and open at the top to form a discharge chamber. A rotary discharge mechanism is installed inside the discharge chamber, and a discharge port is located at the bottom of the discharge chamber. A heating jacket surrounding the discharge chamber is provided on the inner wall of the discharge box, and a first heating component is installed inside the heating jacket. The conveying mechanism includes a cylindrical shell and a screw conveying component installed inside the cylindrical shell. The two ends of the cylindrical shell are a feeding end and a discharge end, respectively. The feeding end is connected to the discharge port, and the discharge end is provided with a conveying opening. An annular heating jacket is installed inside the cylindrical shell, and a second heating component is installed inside the annular heating jacket.

2. The screw pump discharge device according to claim 1, characterized in that, The discharge box includes an integrally formed rectangular box and an arc-shaped box at the bottom of the rectangular box, with the discharge port located at the bottom of the arc-shaped box.

3. The screw pump discharge device according to claim 1, characterized in that, The rotary discharge mechanism includes a rotary drive motor and a rotary rod connected to the rotary drive motor, the rotary rod being arranged transversely in the discharge chamber.

4. The screw pump discharge device according to claim 3, characterized in that, The rotating rod is provided with a plurality of stirring elements, which are arranged at intervals along the circumference and axis of the rotating rod.

5. The screw pump discharge device according to claim 4, characterized in that, The stirring component includes a stirring rod fixedly mounted on the rotating rod, a stirring blade is provided at the end of the stirring rod away from the rotating rod, and an elastic scraper is provided on the side of the stirring blade away from the stirring rod.

6. The screw pump discharge device according to claim 1, characterized in that, It also includes a filter element, which is disposed on the discharge port.

7. The screw pump discharge device according to claim 1, characterized in that, The screw conveying assembly includes a drive unit and symmetrically arranged right-hand screw and left-hand screw, which mesh with each other.

8. The screw pump discharge device according to claim 7, characterized in that, The cylindrical shell is provided with a feeding chamber for mounting the right-hand screw and the left-hand screw. The feeding chamber is provided with threaded grooves corresponding to the right-hand screw and the left-hand screw. The annular heating jacket is arranged around the feeding chamber.

9. The screw pump discharge device according to claim 8, characterized in that, The second heating component includes a spiral heating tube disposed in the annular heating jacket, wherein the heating medium is conveyed in the opposite direction to the conveying direction of the high-temperature polyester resin liquid in the conveying chamber.

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