A screw pump discharge system for a polyester resin
By designing the feeding heating mechanism and pump body, the problems of high energy consumption and blockage in the polyester resin conveying process are solved, achieving stable conveying with low energy consumption and low wear.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUANGSHAN JIAHENG TECH CO LTD
- Filing Date
- 2025-09-23
- Publication Date
- 2026-08-04
AI Technical Summary
During the high-temperature, high-viscosity transport of polyester resin, conventional equipment consumes a lot of energy, suffers severe wear on mechanical parts, and is prone to pipe blockage due to sudden temperature drops.
The system employs a feeding heating mechanism and pump body design, including a feeding box heating jacket, a stirring assembly, a pump casing insulation jacket, and a screw conveying assembly. Heating and stirring maintain the temperature uniformity of the polyester resin during the conveying process, preventing curing.
It reduces energy consumption, minimizes wear on mechanical parts, avoids pipe blockage, and ensures that the polyester resin remains in a liquid state during transportation.
Smart Images
Figure CN224592340U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of polyester resin production technology, and in particular to a screw pump discharge system for polyester resin. Background Technology
[0002] Polyester resins, as important polymer synthetic materials, are mainly divided into two categories based on differences in raw material composition and synthesis process: saturated polyester resins and unsaturated polyester resins. Saturated polyester resins are typically formed by the condensation polymerization of diols and saturated diacids. Their molecular chains do not contain unsaturated double bonds, exhibiting excellent weather resistance, chemical corrosion resistance, and good flexibility, and are widely used in coatings, adhesives, and other fields. Unsaturated polyester resins, on the other hand, involve the introduction of unsaturated diacids (such as maleic anhydride) into the condensation reaction. Their molecular chains contain unsaturated double bonds and can form a three-dimensional network structure through cross-linking and curing, making them important in fields such as fiberglass and artificial stone.
[0003] In the industrial production process of polyester resin, the polyester resin synthesized in the reactor needs to be transported to subsequent processes under high temperature (usually 180-280℃) and high viscosity conditions. For example, saturated polyester resin needs to be transported to a cooling and slicing system for crystallization and granulation, while unsaturated polyester resin needs to be transported to a mixing tank to be mixed with crosslinking agents, fillers, etc. The transportation of high-viscosity fluids under high temperature conditions requires overcoming extremely large shear resistance. The power system of conventional transportation equipment needs to operate under continuous high load, resulting in a significant increase in energy consumption and accelerated wear of mechanical parts. At the same time, when the temperature of the inner wall of the transportation pipeline or equipment is lower than the melting point of the material (usually 150-220℃), the polyester resin close to the wall is prone to solidify first due to the sudden drop in temperature, forming a solid adhesion layer that gradually expands towards the center of the pipeline, eventually leading to pipeline blockage. The risk of blockage is significantly increased, especially at abrupt changes in flow path, such as valves, elbows, and pump cavities. Utility Model Content
[0004] The purpose of this invention is to provide a screw pump discharge system for polyester resin to address the aforementioned shortcomings in the prior art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: A screw pump discharge system for polyester resin includes: A feeding and heating mechanism includes a mounting frame and a feeding box mounted on the mounting frame. The feeding box is hollow to form a feeding cavity. A heating jacket is provided on the inner wall of the feeding cavity, and a heating component is provided inside the heating jacket. A stirring assembly is provided inside the feeding cavity. A stirring drive unit is provided on the mounting frame. The stirring assembly is connected to the stirring drive unit. A feeding opening is provided at the top of the feeding cavity, and a discharging opening is provided at the bottom of the feeding cavity. The pump body includes a pump casing and a rotary drive unit. The pump casing has a conveying chamber for conveying materials. The inner wall of the conveying chamber is provided with a heat insulation layer. A heating and heat insulation component is provided in the heat insulation layer. A screw conveying assembly is provided in the conveying chamber. The pump casing includes an inlet end and an outlet end. The inlet end is provided with a material receiving port, which is connected to the outlet opening. The outlet end is provided with a conveying port.
[0006] The aforementioned screw pump discharge system for polyester resin includes a screw conveying assembly comprising a first screw and a second screw arranged in parallel. The first screw has a first transmission gear at its driving end, and the second screw has a second transmission gear at its driving end. The first transmission gear and the second transmission gear mesh with each other.
[0007] In the aforementioned screw pump discharge system for polyester resin, the rotary drive unit includes a rotary drive motor and a reducer, and the first transmission gear is connected to the reducer in a transmission connection.
[0008] The aforementioned screw pump discharge system for polyester resin includes a stirring assembly comprising a first stirring shaft and a second stirring shaft, wherein a first helical blade is provided on the first stirring shaft and a second helical blade is provided on the second stirring shaft.
[0009] In the aforementioned screw pump discharge system for polyester resin, the size of the second helical blade is larger than the size of the first helical blade.
[0010] The aforementioned screw pump discharge system for polyester resin includes a stirring drive unit comprising a first stirring drive component and a second stirring drive component, wherein the first stirring shaft is drivenly connected to the first stirring drive component, and the second stirring shaft is drivenly connected to the second stirring drive component.
[0011] In the aforementioned screw pump discharge system for polyester resin, the feed box is horizontally positioned, and the feed opening and discharge opening are staggered.
[0012] The aforementioned screw pump discharge system for polyester resin includes a heating component comprising an annular inlet, multiple heating tubes, and an annular return component. Each heating tube is arranged along the axial direction of the feed box. The annular inlet and the annular return component are respectively located at both ends of the feed box, and both ends of the heating tube are connected to the annular inlet and the annular return component, respectively.
[0013] In the above technical solution, the screw pump discharge system for polyester resin provided by this utility model includes a feeding heating mechanism and a pump body. The feeding mechanism includes a mounting frame and a feeding box set on the mounting frame. The inside of the feeding box is hollow to form a feeding chamber. A heating jacket is provided on the inner wall of the feeding chamber, and a heating component is provided in the heating jacket. A stirring assembly is provided in the feeding chamber. The pump body includes a pump casing and a rotary drive unit. A conveying chamber for material conveying is provided inside the pump casing. A heat insulation jacket is provided on the inner wall of the conveying chamber, and a heating and heat insulation component is provided in the heat insulation jacket. A screw conveying assembly is provided in the conveying chamber. During use, the heating component heats the feeding chamber, thereby heating the polyester resin in the feeding chamber to a suitable temperature. The stirring assembly can stir the polyester resin in the feeding chamber, making the polyester resin temperature uniform. The heating and heat insulation component heats the conveying chamber, thereby keeping the polyester resin at a suitable temperature during conveying. This ensures that the polyester resin remains in a liquid state in both the discharge chamber and the conveying chamber, and does not solidify. Attached Figure Description
[0014] 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.
[0015] Figure 1 A front view of the screw pump discharge system provided in an embodiment of this utility model; Figure 2 This is a schematic diagram of the feeding heating mechanism provided in an embodiment of the present utility model; Figure 3 A schematic diagram of the pump body provided in an embodiment of this utility model; Figure 4 This is a schematic diagram of the internal structure of the pump body provided in an embodiment of the present utility model; Figure 5 This is a schematic diagram of the heating component provided in an embodiment of the present invention.
[0016] Explanation of reference numerals in the attached figures: 1. Feeding and heating mechanism; 11. Mounting frame; 12. Feeding box; 121. Feeding opening; 122. Discharge opening; 13. Feeding chamber; 14. Heating jacket; 15. Heating component; 151. Annular liquid inlet; 152. Heating tube; 153. Annular liquid return component; 16. Stirring drive unit; 161. First stirring drive component; 162. Second stirring drive component; 17. Stirring assembly; 171. First stirring shaft; 172. First spiral blade; 173. Second stirring shaft; 174. Second spiral blade; 2. Pump body; 21. Pump casing; 211. Material inlet; 212. Material conveying port; 22. Rotation drive unit; 23. Conveying chamber; 24. Insulation jacket; 25. Heating and insulation component; 26. Screw conveying assembly; 261. First screw; 262. Second screw; 263. First transmission gear; 264. Second transmission gear. Detailed Implementation
[0017] 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.
[0018] like Figure 1-5 As shown, this utility model provides a screw pump discharge system for polyester resin, including a feeding and heating mechanism 1 and a pump body 2. The feeding mechanism includes a mounting frame 11 and a feeding box 12 mounted on the mounting frame 11. The inside of the feeding box 12 is hollow, forming a feeding cavity 13. A heating jacket 14 is provided on the inner wall of the feeding cavity 13, and a heating component 15 is provided inside the heating jacket 14. A stirring assembly 17 is provided inside the feeding cavity 13, and a stirring drive unit 16 is provided on the mounting frame 11. The stirring assembly 17 and the stirring drive unit 16 are connected by a transmission. Next, the top of the feeding chamber 13 is provided with a feeding opening 121, and the bottom of the feeding chamber 13 is provided with a discharging opening 122. The pump body 2 includes a pump casing 21 and a rotary drive unit 22. The pump casing 21 is provided with a conveying chamber 23 for material conveying. The inner wall of the conveying chamber 23 is provided with a heat insulation layer 24. The heat insulation layer 24 is provided with a heating and heat insulation component 25. The conveying chamber 23 is provided with a screw conveying assembly 26. The pump casing 21 includes a feeding end and a discharging end. The feeding end is provided with a receiving port 211, and the discharging end is provided with a conveying port 212.
[0019] Specifically, the mounting frame 11 is used for mounting the feed box 12, which is used to receive the high-temperature polyester resin liquid transported from the reactor and can stir and mix the polyester resin liquid. The feed box 12 is a cylindrical box, which is placed horizontally on the mounting frame 11. A cylindrical feed cavity 13 is formed inside the feed box 12. A feed opening 121 is provided at the top of the feed cavity 13, and a discharge opening 122 is provided at the bottom of the feed cavity 13. The feed opening 121 and the discharge opening 122 are located in the feed cavity 12. At opposite ends of 3, a stirring drive unit 16 is provided on the mounting frame 11, and a stirring assembly 17 is provided in the feeding chamber 13. The stirring assembly 17 is arranged along the axial direction of the cylindrical box. The stirring assembly 17 is connected to the stirring drive unit 16. The stirring drive unit 16 can drive the stirring assembly 17 to rotate. The stirring assembly 17 can stir and mix the high-temperature polyester resin liquid in the feeding chamber 13, thereby making the high-temperature polyester resin mixed and the temperature of the high-temperature polyester resin uniform.
[0020] A heating jacket 14 is provided on the inner wall of the feeding chamber 13. A heating component 15 is provided inside the heating jacket 14. The heating component 15 includes an annular liquid inlet 151, multiple heating tubes 152, and an annular liquid return component 153. Each heating tube 152 is arranged along the axial direction of the feeding box 12, and the multiple heating tubes 152 are arranged sequentially at intervals along the circumference of the feeding box 12. The annular liquid inlet 151 is located on the side of the feeding box 12 near the discharge opening 122, and the annular liquid return component 153 is located on the side of the feeding box 12 near the feed opening 121. One end of each heating tube 152 is connected to the annular liquid inlet 151, and the other end of each heating tube 152 is connected to the annular liquid inlet 151. Connected to the annular return liquid component 153, a heating unit for recirculating heating of the heating medium can also be provided on the mounting frame 11. The medium heated by the heating unit is then transported to the annular inlet liquid component 151 and dispersed into each heating tube 152. After the heating medium is transported from the heating tube 152 to the annular return liquid component 153, it flows back to the heating unit for heating. The flow direction of the heating medium in the heating tube 152 is opposite to the conveying direction of the polyester resin along the feed chamber 13, thereby improving the heating effect on the polyester resin and ensuring that the polyester resin is heated to a suitable temperature before being transported into the pump body 2.
[0021] In this embodiment, the pump body 2 includes a pump casing 21 and a rotary drive unit 22. The pump casing 21 is a cylindrical shell, and a conveying cavity 23 is provided inside the pump casing 21. The screw conveying assembly 26 is disposed in the conveying cavity 23. The inner wall of the conveying cavity 23 is provided with a heat insulation layer 24, and a heating and heat insulation component 25 is disposed in the heat insulation layer 24. The heating and heat insulation component 25 can adopt an electric heating structure or other heating structures to heat the conveying cavity 23 by electric heating or steam heating, so that the polyester resin is always kept at a suitable temperature during the conveying process, and the polyester resin is prevented from curing during the conveying process.
[0022] The pump casing 21 is arranged horizontally or inclinedly, with the two ends of the pump casing 21 being the feed end and the discharge end, respectively. A receiving port 211 is provided at the feed end, which is connected to the discharge opening 122. In this way, the polyester resin heated to a suitable temperature in the feed box 12 is conveyed from the discharge opening 122 and the receiving port 211 to the conveying chamber 23. The screw conveying assembly can rotate in the conveying chamber 23, thereby conveying the polyester resin from the feed end to the discharge end. A conveying port 212 is provided at the discharge end, and finally, the resin is conveyed from the conveying port 212 to the next equipment for subsequent processing.
[0023] The screw pump discharge system for polyester resin provided by this utility model includes a feeding and heating mechanism 1 and a pump body 2. The feeding mechanism includes a mounting frame 11 and a feeding box 12 mounted on the mounting frame 11. The inside of the feeding box 12 is hollow to form a feeding cavity 13. A heating jacket 14 is provided on the inner wall of the feeding cavity 13, and a heating component 15 is provided inside the heating jacket 14. A stirring assembly 17 is provided inside the feeding cavity 13. The pump body 2 includes a pump casing 21 and a rotary drive unit 22. A conveying cavity 23 for material conveying is provided inside the pump casing 21, and a heat-insulating jacket 24 is provided on the inner wall of the conveying cavity 23. A heating and insulation component 25 is installed inside the layer 24, and a screw conveying assembly 26 is installed inside the conveying chamber 23. During use, the heating component 15 heats the feeding chamber 13, thereby heating the polyester resin in the feeding chamber 13 to a suitable temperature. The stirring component 17 can stir the polyester resin in the feeding chamber 13, making the polyester resin temperature uniform. The heating and insulation component 25 heats the conveying chamber 23, thereby keeping the polyester resin at a suitable temperature during the conveying process, so that the polyester resin remains in a liquid state in both the discharge chamber and the conveying chamber, and does not solidify.
[0024] In this embodiment, preferably, the screw conveying assembly 26 includes a first screw 261 and a second screw 262 arranged in parallel. The driving end of the first screw 261 is provided with a first transmission gear 263, and the driving end of the second screw 262 is provided with a second transmission gear 264. The first transmission gear 263 and the second transmission gear 264 mesh with each other. The rotary drive unit 22 includes a rotary drive motor and a reducer. The first transmission gear 263 is connected to the reducer in a transmission connection. The first screw 261 and the second screw 262 are symmetrically arranged. The first screw 261 adopts a left-hand thread and the second screw 262 adopts a right-hand thread. When the first screw 261 and the second screw 262 rotate in opposite directions, they can form a force of mutual extrusion, which smoothly pushes the material from the feed end of the pump casing 21 to the discharge end. A drive chamber is provided inside the pump casing 21. The drive chamber and the conveying chamber 23 are independent chambers. The first transmission gear 263 and the second transmission gear 264 are located in the drive chamber. The end of the first screw 261 extends from the conveying chamber 23 into the drive chamber and is coaxially and fixedly connected to the first transmission gear 263. The end of the second screw 262 extends from the conveying chamber 23 into the drive chamber and is coaxially and fixedly connected to the second transmission gear 264. The first transmission gear 263 and the second transmission gear 264 are externally meshed. Thus, when the rotary drive motor and the reducer drive the first transmission gear 263 to rotate, the second transmission gear 264 is also driven to rotate, thereby making the first screw 261 and the second screw 262 rotate synchronously.
[0025] In this embodiment, preferably, the stirring assembly 17 includes a first stirring shaft 171 and a second stirring shaft 173. The first stirring shaft 171 and the second stirring shaft 173 are arranged along the axial direction of the feeding chamber 13. The first stirring shaft 171 is provided with a first spiral blade 172, and the second stirring shaft 173 is provided with a second spiral blade 174. The size of the second spiral blade 174 is larger than the size of the first spiral blade 172. The first spiral blade 172 of the first stirring shaft 171 is smaller in size, with a narrow width and a dense pitch, which can break up the agglomerated resin particles. The second spiral blade 174 of the second stirring shaft 173 is larger in size, with a wide blade width and a sparse pitch, which can promote the material in the chamber to form an overall circulating flow, covering most of the area of the feeding chamber 13, and avoiding local material retention for a long time, which would lead to temperature stratification.
[0026] The stirring drive unit 16 includes a first stirring drive component 161 and a second stirring drive component 162. A first stirring shaft 171 is drivenly connected to the first stirring drive component 161, and a second stirring shaft 173 is drivenly connected to the second stirring drive component 162. The first stirring shaft 171 and the first stirring drive component 161, and the second stirring shaft 173 and the second stirring drive component 162 are all connected by elastic couplings. The elastic buffer of the coupling can compensate for installation errors, buffer starting impacts, and withstand high temperature environments to prevent components from jamming. The first stirring shaft 171 and the second stirring shaft 173 are positioned and connected to the feed box 12 by high temperature bearings. The first stirring drive component 161 and the second stirring drive component 162 are fixed on the motor base preset on the mounting frame 11.
[0027] 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 system for polyester resin, characterized in that, include: Feeding heating mechanism (1), the feeding heating mechanism includes a mounting frame (11) and a feeding box (12) set on the mounting frame (11). The inside of the feeding box (12) is hollow to form a feeding cavity (13). A heating jacket (14) is provided on the inner wall of the feeding cavity (13). A heating component (15) is provided in the heating jacket (14). A stirring assembly (17) is provided in the feeding cavity (13). A stirring drive unit (16) is provided on the mounting frame (11). The stirring assembly (17) is connected to the stirring drive unit (16) in a transmission. A feeding opening (121) is provided at the top of the feeding cavity (13). A discharging opening (122) is provided at the bottom of the feeding cavity (13). The pump body (2) includes a pump casing (21) and a rotary drive unit (22). The pump casing (21) has a conveying chamber (23) for material conveying inside. The inner wall of the conveying chamber (23) is provided with a heat insulation layer (24). The heat insulation layer (24) is provided with a heating and heat insulation component (25). The conveying chamber (23) is provided with a screw conveying assembly (26). The pump casing (21) includes a feed end and a discharge end. The feed end is provided with a receiving port (211). The receiving port (211) is connected to the discharge opening (122). The discharge end is provided with a conveying port (212).
2. The screw pump discharge system for polyester resin according to claim 1, characterized in that, The screw conveying assembly (26) includes a first screw (261) and a second screw (262) arranged in parallel. The first screw (261) has a first transmission gear (263) at its driving end, and the second screw (262) has a second transmission gear (264) at its driving end. The first transmission gear (263) and the second transmission gear (264) mesh with each other.
3. The screw pump discharge system for polyester resin according to claim 2, characterized in that, The rotary drive unit (22) includes a rotary drive motor and a speed reducer, and the first transmission gear (263) is connected to the speed reducer in a transmission connection.
4. The screw pump discharge system for polyester resin according to claim 1, characterized in that, The stirring assembly (17) includes a first stirring shaft (171) and a second stirring shaft (173). The first stirring shaft (171) is provided with a first spiral blade (172), and the second stirring shaft (173) is provided with a second spiral blade (174).
5. The screw pump discharge system for polyester resin according to claim 4, characterized in that, The size of the second helical blade (174) is larger than the size of the first helical blade (172).
6. The screw pump discharge system for polyester resin according to claim 5, characterized in that, The stirring drive unit (16) includes a first stirring drive component (161) and a second stirring drive component (162). The first stirring shaft (171) is connected to the first stirring drive component (161), and the second stirring shaft (173) is connected to the second stirring drive component (162).
7. The screw pump discharge system for polyester resin according to claim 1, characterized in that, The feed box (12) is horizontally arranged, and the feed opening (121) and the discharge opening (122) are located at both ends of the feed box (12).
8. The screw pump discharge system for polyester resin according to claim 7, characterized in that, The heating component (15) includes an annular liquid inlet (151), multiple heating tubes (152) and an annular liquid return component (153). Each heating tube (152) is arranged along the axial direction of the feed box (12). The annular liquid inlet (151) and the annular liquid return component (153) are respectively arranged at both ends of the feed box (12). The two ends of the heating tube (152) are respectively connected to the annular liquid inlet (151) and the annular liquid return component (153).