Cooling device for PVC (polyvinyl chloride) granulation production line

Abstract

The utility model relates to the technical field of PVC (polyvinyl chloride) granulation equipment, in particular to a cooling device for a PVC granulation production line, which comprises a cooling water tank and a flow equalizing box connected with two ends of the cooling water tank, a feeding roller and a discharging roller are respectively arranged above two ends of the cooling water tank, a plurality of parallel supporting and pulling rollers capable of lifting are arranged in an upper opening of the cooling water tank, and the upper opening of the cooling water tank is communicated with the flow equalizing box. The two flow equalizing boxes are connected with water inlet pipes and water outlet pipes in a one-to-one mode, and the water inlet pipes and the water outlet pipes communicate with water storage devices. The flow equalizing box body is provided with a large end and a small end which are opposite to each other, the two ends are internally communicated and provided with a propeller, the smaller end is communicated with the water inlet pipe or the water outlet pipe, and the larger end is provided with a flow equalizing plate; at least one of the supporting and pulling rollers can actively rotate, and all the supporting and pulling rollers are located between the two flow equalizing plates. According to the utility model, the PVC material strip is supported and pulled into an up-and-down fluctuating shape through the supporting and pulling rollers and passes through the cooling water tank after being bent for multiple times, so that the cooling effect is good, the temperature difference of water temperature in each area of cooling water in the water tank is small, and the ideal cooling effect of the PVC material strip can be ensured.

Description

Technical Field

[0001] This utility model relates to the field of PVC granulation equipment technology, and in particular to a cooling device for a PVC granulation production line. Background Technology

[0002] In the PVC granulation process, the high-temperature molten material extruded from the extruder needs to be cooled and shaped before it can be cut into high-quality granules. The common cooling method is to pass the material through a water tank. However, uneven cooling and low cooling efficiency can negatively impact the quality and production efficiency of the PVC granules, increasing production costs and the difficulty of subsequent processing. Optimizing the cooling device and extending the residence time of the material in the water tank, while ensuring a uniform and controllable water temperature, can significantly improve cooling efficiency and achieve better cooling results. Summary of the Invention

[0003] The purpose of this invention is to provide a novel cooling device for a PVC granulation production line, so as to improve the cooling effect and production efficiency, and reduce energy consumption and product defect rate.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A cooling device for a PVC granulation production line includes a cooling water tank and flow equalization boxes connected to both ends of the cooling water tank. Feed rollers and discharge rollers are respectively installed above both ends of the cooling water tank. The cooling water tank is an open-top type and several parallel and movable support rollers are installed inside the opening. The two flow equalization boxes are connected one-to-one with inlet pipes and outlet pipes. The inlet pipes and outlet pipes are connected to a water storage device.

[0006] The flow equalization box includes a box body, which has two opposite ends with different cross-sections in the horizontal direction. The two ends are internally connected and equipped with a propeller. The smaller end is connected to an inlet pipe or an outlet pipe, and the larger end is equipped with a flow equalization plate with several water flow holes.

[0007] At least one of the support rollers is connected to a motor for rotation output, and all support rollers are located between two flow equalization plates.

[0008] Furthermore, the two ends of the support roller are connected to lifting devices. The lifting devices include brackets that bypass the wall of the cooling water tank. The two ends of the brackets extend upward into the cooling water tank and are connected to the support rollers. The middle section is located below the cooling water tank and is connected to a motor screw module.

[0009] Furthermore, the bracket is limited to vertical movement within a vertical guide rail, which is fixed to the outer wall of the cooling water tank.

[0010] Furthermore, the support roller includes a central shaft and a rotating sleeve that is rotatably connected to the periphery. A rotary motor is installed inside one of the central shafts, and a magnetic block is connected to the output shaft of the rotary motor. The magnetic block is attracted to a magnetic block that is also installed inside the corresponding rotating sleeve.

[0011] Furthermore, the water storage device is equipped with a temperature sensor and a liquid level sensor.

[0012] Furthermore, the number of the support rollers is ≥3, and the lifting and lowering movements of each support roller are independent.

[0013] Furthermore, the motor lead screw module includes a lead screw that is vertically arranged downwards, and the lead screw is screwed to a nut fixed in the bracket.

[0014] Furthermore, the central shaft and the rotating sleeve are connected by bearings.

[0015] The beneficial effects of adopting the technical solution of this utility model are:

[0016] The cooling device of this PVC granulation production line uses multiple support rollers to stretch the PVC strips into an undulating shape, causing them to bend multiple times as they pass through the cooling water tank. This extends the material's residence time in the water, resulting in longer contact time and better cooling effect. By setting up a flow equalization box, the cooling water in the tank is made to flow turbulently, with small temperature differences between different areas, ensuring that the PVC strips can achieve the ideal cooling effect and guaranteeing the stability and consistency of the cooling process. This improves the quality of PVC granules and production efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along the AA direction;

[0020] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure along the BB direction;

[0021] Figure 4 for Figure 1 Enlarged view of point C in the middle;

[0022] Figure 5 This is a schematic diagram of the cross-sectional structure of the support roller of this utility model;

[0023] Figure 6 This is a three-dimensional structural diagram of the present invention from another angle;

[0024] In the diagram: 1. Cooling water tank; 2. Flow equalization box; 2a. Box body; 2b. Propeller; 2c. Flow equalization plate; 3. Feed roller; 4. Discharge roller; 5. Support roller; 5a. Central shaft; 5b. Rotary sleeve; 5c. Rotary motor; 5d. Magnetic block; 6. Water storage device; 7. Lifting device; 7a. Support frame; 7b. Motor lead screw module; 7c. Vertical guide rail. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention. Therefore, they only show the components relevant to the present invention and should not limit the scope of protection of the present invention.

[0026] Please see Figures 1-6 The cooling device for a PVC granulation production line includes a cooling water tank 1 and a flow equalization box 2 connected to both ends of the cooling water tank 1. Feed rollers 3 and discharge rollers 4 are respectively installed above both ends of the cooling water tank 1. The high-temperature material strip extruded from the extruder passes sequentially through the feed rollers 3, the cooling water tank 1, and the discharge rollers 4 to complete cooling. Specifically, the flow equalization box 2 includes a box body 2a. The box body 2a has two opposite ends with different cross-sections in the horizontal direction, and the two ends are internally connected and equipped with propellers 2b. The smaller end is connected to an inlet pipe or an outlet pipe, and the larger end is equipped with a flow equalization plate 2c. The flow equalization plate 2c is located at both ends of the cooling water tank 1, and the flow equalization plate 2c is provided with several water flow holes. Cooling water enters, rotates through the propellers 2b, and passes through the water flow holes, which reduces the temperature difference between different areas of the cooling water in the tank, further enhancing the heat exchange effect and making the material cool more uniformly.

[0027] To improve cooling efficiency, the cooling water tank 1 is open at the top, and several parallel, vertically movable support rollers 5 are arranged inside the opening. The number of support rollers 5 is ≥3, and the vertical movement of each support roller 5 is independent. At least one of the support rollers 5 is connected to a motor for rotation output, meaning it can rotate actively. All support rollers 5 are located between two flow equalization plates 2c. Figure 3 As shown, the material strip passes around each support roller 5 in sequence in the water tank. The support roller 5 stretches the material strip into an up-and-down undulating shape, bending it multiple times to prolong the residence time of the material in the water.

[0028] To achieve lifting control of the support roller 5, lifting devices 7 are connected to both ends of the support roller 5. The lifting device 7 includes a bracket 7a that bypasses the wall of the cooling water tank 1. Both ends of the bracket 7a extend upward into the cooling water tank 1 and are connected to the support roller 5. The middle section is located below the cooling water tank 1 and is connected to a motor screw module 7b. The motor screw module 7b includes a downwardly vertical screw. The screw is screwed to a nut fixed in the bracket 7a. When the screw rotates, it drives the bracket 7a to rise and fall. The bracket 7a moves up and down within a vertical guide rail 7c. The vertical guide rail 7c is fixed to the outer wall of the cooling water tank 1.

[0029] To achieve the active rotation of the support roller 5 and ensure smooth movement of the material strip in the cooling water tank, the support roller 5 includes a central shaft 5a and a rotating sleeve 5b that is rotatably connected to the outside. The central shaft 5a and the rotating sleeve 5b are connected by bearings. A rotary motor 5c is installed in one of the central shafts 5a. The output shaft of the rotary motor 5c is connected to a magnetic block 5d. The magnetic block 5d is attracted to a corresponding magnetic block 5d installed in the rotating sleeve 5b. When the rotary motor 5c rotates, the rotating sleeve 5b rotates through the magnetic attraction of the two magnetic blocks 5d. The magnetic force transmits power to isolate the motor from water and prevent short circuits.

[0030] To achieve water supply and drainage within the cooling water tank 1, two flow equalization boxes 2 are connected one-to-one with inlet and outlet pipes, which are connected to a water storage device 6. The water storage device 6 supplies water to the cooling water tank 1 and circulates it via a pump. The water storage device 6 is equipped with a temperature sensor and a level sensor. When the temperature and level of the water measured by the temperature and level sensors fall below set values, the water replenishment valve is activated to replenish water, thus achieving controllable water temperature and level within the water storage device 6. Simultaneously, the feeding and discharging directions of the material strips can be reversed, with the water flow direction in the cooling water tank 1 opposite to the material strip movement direction. This ensures a significant temperature difference between the material and the cooling water throughout the cooling process, improving cooling efficiency and enabling the stable production of high-quality PVC granule products, resulting in significant economic benefits and application value.

[0031] Further optimization solutions, such as Figure 4 As shown, the surface of the rotating sleeve 5b that contacts the material strip is provided with multiple parallel annular grooves, which facilitates the separation of the material strips passing over it and avoids entanglement.

[0032] When using the cooling device of the PVC granulation production line of this utility model, the high-temperature strip extruded from the extruder passes sequentially through the feed roller 3, cooling water tank 1, and discharge roller 4. The water storage device 6 supplies water to the cooling water tank 1 and circulates it through a pump. The water flow direction in the cooling water tank 1 is opposite to the movement direction of the strip. Multiple support rollers 5 support and pull the PVC strip into an up-and-down undulating shape, making it bend multiple times as it passes through the cooling water tank 1, extending the residence time of the material in the water, resulting in a longer contact time and better cooling effect. By setting up a flow equalization box 2, the cooling water in the tank forms turbulence, and the temperature difference between different areas is small, ensuring that the PVC strip can achieve the ideal cooling effect and guaranteeing the stability and consistency of the cooling process. This effectively solves the problems of uneven cooling and low efficiency of traditional cooling devices, improves the quality and production efficiency of PVC granules, and also has significant advantages in equipment maintenance and energy consumption control, with broad application prospects and market value.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. It should be noted that for those skilled in the art, any changes, modifications or additions made without departing from the concept of the present utility model should fall within the protection scope of the present utility model.

Claims

1. A cooling device for a PVC granulation production line, characterized in that: Includes a cooling water tank (1) and flow equalization boxes (2) connected to both ends of the cooling water tank (1). Feed rollers (3) and discharge rollers (4) are respectively installed above both ends of the cooling water tank (1). The cooling water tank (1) is an open type with several lifting and pulling rollers (5) installed inside the opening. The two flow equalization boxes (2) are connected one-to-one with water inlet pipes and water outlet pipes. The water inlet pipes and water outlet pipes are connected to a water storage device (6). The flow equalization box (2) includes a box body (2a), which has two opposite ends with different cross-sections, one large and one small. A propeller (2b) is installed inside between the two ends. The smaller end is connected to an inlet pipe or an outlet pipe, and the larger end is provided with a flow equalization plate (2c). The flow equalization plate (2c) is provided with water flow holes. At least one of the support rollers (5) is connected to a motor for rotation output, and all support rollers (5) are located between two flow equalization plates (2c).

2. The cooling device for the PVC granulation production line according to claim 1, characterized in that: The two ends of the support roller (5) are connected to a lifting device (7). The lifting device (7) includes a bracket (7a) that bypasses the wall of the cooling water tank (1). The two ends of the bracket (7a) extend upward into the cooling water tank (1) and are connected to the support roller (5). The middle section is located below the cooling water tank (1) and is connected to a motor screw module (7b).

3. The cooling device for the PVC granulation production line according to claim 2, characterized in that: The bracket (7a) is limited to vertical movement within the vertical guide rail (7c), which is fixed to the outer wall of the cooling water tank (1).

4. The cooling device for the PVC granulation production line according to claim 3, characterized in that: The support roller (5) includes a central shaft (5a) and a rotating sleeve (5b) that is rotatably connected to the periphery. A rotary motor (5c) is provided inside one of the central shafts (5a). The output shaft of the rotary motor (5c) is connected to a magnetic block (5d). The magnetic block (5d) is attracted to a magnetic block (5d) that is also provided inside the corresponding rotating sleeve (5b).

5. The cooling device for the PVC granulation production line according to claim 1, characterized in that: The water storage device (6) is equipped with a temperature sensor and a liquid level sensor.

6. The cooling device for the PVC granulation production line according to claim 4, characterized in that: The number of the support rollers (5) is ≥3, and the lifting and lowering movements of each support roller (5) are independent.

7. The cooling device for the PVC granulation production line according to claim 2, characterized in that: The motor lead screw module (7b) includes a lead screw that is vertically arranged downwards, and the lead screw is screwed to a nut fixed in the bracket (7a).

8. The cooling device for the PVC granulation production line according to claim 4, characterized in that: The central shaft (5a) and the rotating sleeve (5b) are connected by bearings.

Images