Water chamber for underwater granulator

Abstract

The utility model relates to the technical field of underwater granulator water chambers, and discloses a water chamber for an underwater granulator, the water chamber comprises a granulating ring, a water inlet pipe, a water outlet pipe and a connecting part, the ring wall of the granulating ring is provided with a water inlet and a water outlet which are axially staggered, the center line of the water inlet and the center line of the water outlet form an included angle alpha, and the alpha is less than 180 degrees; the water inlet pipe is adjustably mounted at the water inlet through the connecting part; and the water outlet pipe is adjustably mounted at the water outlet through the connecting part. The device has the effects that the disorder degree of water flow in the water chamber is reduced, and cut particles can be conveniently discharged in time.

Description

Technical Field

[0001] This application relates to the field of underwater pelletizer water chamber technology, and in particular to an underwater pelletizer water chamber. Background Technology

[0002] An underwater pelletizer is a device used to cut polymer melt into pellets, the cutting process taking place underwater, hence its name. It is widely used in the manufacture of polymer semi-finished products, such as polyester polymer chips.

[0003] Most underwater pelletizers currently have inlet and outlet pipes connected to their water chambers. When cutting the molten material in the water chamber, the water flow cools the cut pellets, which then flow into the outlet pipes along with the water flow.

[0004] The water inlet pipe is vertically located below the water chamber, and the water outlet pipe is vertically located above the water chamber. However, the existing water inlet and outlet pipes are both straight in and straight out. The water flow at the pellet cutting point in the water chamber is prone to flow direction disorder due to the disturbance of the cutter, resulting in the defect that the cut particles cannot be discharged from the water outlet pipe in time. Utility Model Content

[0005] In order to reduce the turbulence of water flow inside the water chamber and facilitate the timely discharge of cut particles, this application provides a water chamber for an underwater pelletizer.

[0006] The underwater pelletizer water chamber provided in this application adopts the following technical solution:

[0007] An underwater pelletizer water chamber includes a pelletizing ring, an inlet pipe, an outlet pipe, and a connecting part, wherein:

[0008] The pelletizing ring has an axially offset inlet and outlet on its ring wall, and the angle α formed by the center lines of the inlet and outlet is less than 180°.

[0009] The water inlet pipe is adjustablely installed at the water inlet via the connecting part;

[0010] The water outlet pipe is adjustablely installed at the water outlet via the connecting part.

[0011] Optionally, the connecting part includes a limiting component and an adjusting component, wherein:

[0012] The limiting component is disposed on the inner wall side of the pelletizing ring, and the adjusting component is disposed on the outer wall side of the pelletizing ring. The limiting component and the adjusting component clamp and fix the pelletizing ring by axial locking force.

[0013] The limiting component is provided with a threaded connection section that passes through the adjusting component, and the threaded connection section and the water inlet pipe form a detachable threaded pair.

[0014] Optionally, the limiting component includes:

[0015] A connecting pipe, the insertion end of which forms a clearance fit with the water inlet, and the free end of which is provided with an external thread for connection with the water inlet pipe;

[0016] A limiting arc plate is fixed to the outer periphery of the connecting pipe, and its arc-shaped working surface forms a surface contact with the inner wall of the pelletizing ring.

[0017] Optionally, the connecting pipe is provided with several guide plates, and a gradually narrowing guide channel is formed between adjacent guide plates. The surface of the guide plate forms an inclined angle of 15°-75° with the axis of the connecting pipe.

[0018] Optionally, the adjustment component includes:

[0019] The regulating tube has an inner hole that forms a sliding fit with the connecting tube;

[0020] An adjusting arc plate is located at the end of the adjusting tube, and its arc-shaped pressing surface forms a surface contact with the outer wall of the pelletizing ring.

[0021] Optionally, the end of the regulating pipe is provided with a first conical sealing surface, and the end of the water inlet pipe is provided with a second conical sealing surface that cooperates with the first conical sealing surface. The two sealing surfaces form a dynamic sealing pair when axially locked.

[0022] Optionally, the water inlet side edge of the limiting arc plate is provided with a guide slope, and the guide slope forms a 3°-15° guiding angle with the inner wall of the pelletizing ring.

[0023] Optionally, the outlet end of the water inlet pipe is not higher than the inlet end of the water inlet pipe.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. The centerline angle α between the inlet and outlet is less than 180°, which enables the water to form a rotating flow and flow closely along the inner wall of the pelletizing ring. This significantly reduces the risk of water directly impacting the pelletizing device. Furthermore, the water flow direction is consistent with the rotation direction of the pelletizing device, avoiding water flow turbulence at the blades and ensuring efficient discharge of pellets after cutting. This optimizes the cutting and discharge process and improves overall work efficiency and quality.

[0026] 2. The outlet end of the water inlet pipe should not be higher than the inlet end of the water inlet pipe to prevent molten plastic from falling directly into its interior, ensure that the plastic falls accurately into the pelletizing ring, optimize the plastic flow path and facilitate the cleaning of residual materials, reduce raw material waste and cleaning costs in the production process, and improve production continuity and product quality stability.

[0027] 3. The inlet and outlet pipes are installed via a connection that includes a limiting component and an adjusting component. These components work together to clamp the cutting ring, enabling convenient installation and reliable fixation. The elastic sealing gasket and guide plate in the limiting component, along with the conical sealing surface and elastic sealing ring in the adjusting component, enhance sealing performance, effectively preventing water leakage and ensuring the stability of water circulation within the water chamber. Furthermore, replacing the adjusting pipe can compensate for assembly tolerances, improve installation adaptability, extend equipment lifespan, and reduce maintenance costs. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0029] Figure 2 This is a schematic diagram illustrating the pelletizing ring structure in the embodiments of this application.

[0030] Figure 3 This is a schematic diagram illustrating the structure of the connecting part in the embodiments of this application.

[0031] Figure 4 A schematic diagram illustrating the position of the deflector in the embodiments of this application.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Pelletizing ring; 11. Inlet; 12. Outlet; 2. Inlet pipe; 3. Outlet pipe; 4. Connecting part; 41. Limiting component; 411. Connecting pipe; 412. Limiting arc plate; 413. Guide plate; 42. Adjusting component; 421. Adjusting pipe; 422. Adjusting arc plate. Detailed Implementation

[0034] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0035] This application discloses a water chamber for an underwater pelletizer.

[0036] An underwater pelletizer water chamber includes a pelletizing ring 1, an inlet pipe 2, an outlet pipe 3, and a connecting part 4. The ring wall of the pelletizing ring 1 is provided with an axially offset inlet 11 and an outlet 12. The included angle α formed by the center lines of the inlet 11 and the outlet 12 is less than 180°. The inlet pipe 2 is adjustablely installed at the inlet 11 through the connecting part 4, and the outlet pipe 3 is adjustablely installed at the outlet 12 through the connecting part 4.

[0037] A cutting space is formed inside the pelletizing ring 1. After molten plastic is squeezed into the pelletizing ring 1, it is cut into pellets by the pelletizing device of the underwater pelletizer. The angle α formed by the center lines of the inlet 11 and the outlet 12 is less than 180°, preferably 80°. This angle design facilitates the formation of a rotating flow of water. When the water flows into the pelletizing ring 1 from the inlet 11, it can flow closely against the inner wall of the pelletizing ring 1, significantly reducing the risk of the water flow directly impacting the pelletizing device of the underwater pelletizer. At the same time, the flow direction of the water is consistent with the rotation direction of the pelletizing device, further avoiding water flow turbulence at the blades of the pelletizing device, thereby ensuring that the cut pellets can be efficiently discharged from the outlet pipe 3.

[0038] The inlet pipe 2 is configured as a horizontal structure where the outlet end is no higher than the inlet end. In this embodiment, the inlet pipe 2 is arranged horizontally. This structure prevents molten plastic from falling directly into the inlet pipe 2, ensuring that the plastic accurately falls into the pelletizing ring 1. This optimizes the flow path of the plastic and facilitates the cleaning of residual plastic material. The inlet pipe 2 and the outlet pipe 3 are respectively installed at the corresponding inlet 11 and outlet 12 via the connecting part 4. This design improves the installation efficiency and structural stability of the connection between the inlet pipe 2, the outlet pipe 3 and the inside of the pelletizing ring 1.

[0039] The connecting part 4 includes a limiting component 41 and an adjusting component 42. The limiting component 41 is disposed on the inner wall side of the pelletizing ring 1, and the adjusting component 42 is disposed on the outer wall side of the pelletizing ring 1. The limiting component 41 and the adjusting component 42 clamp and fix the pelletizing ring 1 by axial locking force. The limiting component 41 has a threaded connection section that passes through the adjusting component 42, and the threaded connection section forms a detachable threaded connection structure with the water inlet pipe 2. When installing the water inlet pipe 2, the limiting component 41 is placed inside the pelletizing ring 1, and the adjusting component 42 is placed outside the pelletizing ring 1. The threaded connection section of the limiting component 41 passes through the water inlet 11 and the adjusting component 42 in sequence and is threadedly connected to the water inlet pipe 2. As the water inlet pipe 2 is screwed into the threaded connection section, the water inlet pipe 2 pushes the adjusting component 42 against the outer wall of the pelletizing ring 1, so that the limiting component 41 and the adjusting component 42 cooperate to clamp the pelletizing ring 1, thereby realizing convenient installation and reliable fixation of the connecting structure.

[0040] The limiting component 41 specifically includes a connecting pipe 411 and a limiting arc plate 412. The insertion end of the connecting pipe 411 forms a clearance fit with the water inlet 11, and its free end is provided with an external thread for connection with the water inlet pipe 2. The limiting arc plate 412 is fixed to the outer periphery of the connecting pipe 411, and its arc-shaped working surface forms a surface contact with the inner wall of the pelletizing ring 1. To enhance the sealing performance, an elastic sealing gasket is attached to the arc-shaped working surface of the limiting arc plate 412, which fills the gap between the contact surfaces through elastic deformation, effectively preventing water leakage from the gap between the connecting pipe 411 and the water inlet 11. Several guide plates 413 are provided inside the connecting pipe 411, and a gradually narrowing guide channel is formed between adjacent guide plates 413. The plate surface of the guide plate 413 forms an inclined angle of 15°-75° with the axis of the connecting pipe 411, preferably 70°. The inclined guide plate 413 can pre-guide the water flow, so that the water flow enters the pelletizing ring 1 and flows closely against the inner wall. At the same time, it reduces the turbulence caused by excessive flow in the connecting pipe 411 through the diversion effect, and avoids water flow interfering with the normal operation of the pelletizing device.

[0041] The adjusting assembly 42 includes an adjusting pipe 421 and an adjusting arc plate 422. The inner hole of the adjusting pipe 421 forms a sliding fit with the connecting pipe 411, and the adjusting arc plate 422 is disposed at the end of the adjusting pipe 421, with its arc-shaped pressing surface forming a surface contact with the outer wall of the pelletizing ring 1. By replacing the adjusting pipe 421 with different specifications, the assembly tolerance between the connecting pipe 411 and the water inlet pipe 2 can be compensated, improving installation adaptability. The end of the adjusting pipe 421 is provided with a first conical sealing surface, and the end of the water inlet pipe 2 is provided with a matching second conical sealing surface. When axially locked, the two form a dynamic sealing structure through the conical surface contact. To further improve sealing reliability, an elastic sealing ring is also provided between the first and second conical sealing surfaces.

[0042] The inlet edge of the limiting arc plate 412 is machined with a guide slope, which forms a 3°-15° guiding angle with the inner wall of the pelletizing ring 1. In this embodiment, it is preferably 12°. The guide slope can guide the water flow to transition smoothly and reduce the turbulence generated when the water flow impacts the limiting arc plate 412. The installation method of the outlet pipe 3 is exactly the same as that of the inlet pipe 2, and the connection part 4 with the same structure is used to achieve adjustable installation.

[0043] The implementation principle of the water chamber of an underwater pelletizer according to an embodiment of this application is as follows: The water chamber of the underwater pelletizer includes a pelletizing ring 1, an inlet pipe 2, an outlet pipe 3, and a connecting part 4. The pelletizing ring 1 forms a cutting space inside for cutting molten plastic. The inlet 11 and outlet 12 are axially offset, and the included angle α between their center lines is preferably 80°, which facilitates the formation of a rotating flow of water, which flows close to the inner wall to reduce the risk of impact on the pelletizing device. Moreover, the water flow direction is consistent with the rotation direction of the pelletizing device, which is conducive to the discharge of pellets. The inlet pipe 2 is arranged horizontally to prevent molten plastic from falling in, optimizes the flow path, and facilitates cleaning. The inlet pipe 2 and outlet pipe 3 are installed through the connecting part 4. The limiting component 41 and the adjusting component 42 of the connecting part 4 clamp and fix the pelletizing ring 1 by axial locking force. The threaded connection section of the limiting component 41 is threadedly connected to the inlet pipe 2 to achieve convenient and reliable installation. The limiting assembly 41 includes a connecting pipe 411 and a limiting arc plate 412. A guide plate 413 inside the connecting pipe 411 pre-guides the water flow and reduces turbulence. An elastic sealing gasket on the limiting arc plate 412 enhances the sealing performance. The adjusting assembly 42 includes an adjusting pipe 421 and an adjusting arc plate 422. Assembly tolerances are compensated by replacing the adjusting pipe 421. The conical sealing surface and elastic sealing ring improve sealing reliability. The inlet-side guide slope of the limiting arc plate 412 reduces turbulence. The outlet pipe 3 is installed in the same way as the inlet pipe 2.

[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A water chamber for an underwater pellet cutter, characterized by: The application relates to a cutting ring (1), a water inlet pipe (2), a water outlet pipe (3) and a connecting part (4), wherein: The cutting ring (1) is provided with an axially staggered water inlet (11) and a water outlet (12) on the ring wall, the center lines of the water inlet (11) and the water outlet (12) form an included angle alpha, and alpha < 180 degrees; The water inlet pipe (2) is adjustably installed at the water inlet (11) through the connecting part (4); The water outlet pipe (3) is adjustably installed at the water outlet (12) through the connecting part (4).

2. The water chamber for an underwater guillotine die according to claim 1, wherein: The connecting part (4) comprises a limiting assembly (41) and an adjusting assembly (42), wherein: The limiting assembly (41) is arranged on the inner wall side of the cutting ring (1), the adjusting assembly (42) is arranged on the outer wall side of the cutting ring (1), and the limiting assembly (41) and the adjusting assembly (42) clamp and fix the cutting ring (1) through axial locking force; The limiting assembly (41) is provided with a threaded connection section penetrating through the adjusting assembly (42), and the threaded connection section forms a detachable threaded pair with the water inlet pipe (2).

3. The water chamber for an underwater guillotine die as set forth in claim 2, wherein: The limiting assembly (41) comprises: A connecting pipe (411) which is in clearance fit with the water inlet (11) at an insertion end and is provided with external threads for connecting the water inlet pipe (2) at a free end; A limiting arc plate (412) which is fixedly arranged on the outer periphery of the connecting pipe (411) and is in surface contact with the inner wall of the cutting ring (1) through an arc-shaped working surface.

4. The water chamber for an underwater guillotine die according to claim 3, wherein: A plurality of guide plates (413) are arranged in the connecting pipe (411), tapered guide channels are formed between adjacent guide plates (413), and the plate surface of the guide plate (413) forms an inclined included angle of 15-75 degrees with the axis of the connecting pipe (411).

5. The water chamber for an underwater guillotine die as set forth in claim 3, wherein: The adjusting assembly (42) comprises: An adjusting pipe (421) which is in sliding fit with the connecting pipe (411) through an inner hole; An adjusting arc plate (422) which is arranged on the end portion of the adjusting pipe (421) and is in surface contact with the outer wall of the cutting ring (1) through an arc-shaped pressing surface.

6. The water chamber for an underwater guillotine die as set forth in claim 5, wherein: The end portion of the adjusting pipe (421) is provided with a first tapered sealing surface, the end portion of the water inlet pipe (2) is provided with a second tapered sealing surface matched with the first tapered sealing surface, and the two sealing surfaces form a dynamic sealing pair when being axially locked.

7. The water chamber for an underwater guillotine die as set forth in claim 3, wherein: The water inlet side edge of the limiting arc plate (412) is provided with a guide inclined surface which forms a drainage included angle of 3-15 degrees with the inner wall of the cutting ring (1).

8. The water chamber for an underwater guillotine die as set forth in claim 1, wherein: The water outlet end portion of the water inlet pipe (2) is not higher than the water inlet end portion of the water inlet pipe (2).

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