Filtering device of granulator

Abstract

The utility model relates to the technical field of pelletizers, in particular to a pelletizer filtering device which comprises a cavity and at least two filtering units, each filtering unit comprises a vertical plate, a limiting plate and a gasket, connecting ends are formed at the front end and the rear end of the cavity respectively and communicated with the interior of the cavity, and the filtering units are distributed on the cavity in the length direction of the cavity. When the filter screens need to be maintained, cleaned or replaced, only the adjacent filter units need to be moved to enable the filter screens of the adjacent filter units to execute the filtering function, the filter screens can be moved to the outside of the cavity by moving the vertical plates of the filter units of which the filter screens need to be maintained, cleaned or replaced, production stopping is not needed in the process, and the production efficiency is not affected.

Description

Technical Field

[0001] The utility model relates to the field of granulators, and in particular to a filtering device for a granulator. Background Art

[0002] Due to the thermoplasticity of thermoplastic plastic materials, after the recycled materials are heated to the molten state and extruded into granules, plastic particles (commonly known as plastic rice) can be formed. After the plastic particles are heated and melted and injected into the mold and wait for cooling, the preset plastic products can be obtained, which can greatly reduce the demand for plastic raw materials.

[0003] In order to control the impurity content of the pellets, a filter screen needs to be set in the granulator to filter impurities. Since the molten plastic is viscous, impurities are easily adhered and accumulated on the filter screen, affecting the flow of the plastic. Therefore, the filter screen needs to be maintained, cleaned or replaced regularly. At present, replacing the filter screen often requires stopping the machine, which will affect the production and processing efficiency of granulation. The purpose of the utility model is to provide a filtering device for a granulator that can solve the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a filtering device for a granulator to solve the problems mentioned in the background art.

[0005] To achieve the above purpose, the utility model provides the following technical solutions: It includes a cavity and a filtering unit. The filtering unit includes a vertical plate, a limiting plate and a gasket. Connecting ends are respectively formed at the front and rear ends of the cavity, and the connecting ends are communicated with the inside of the cavity. The number of filtering units is at least 2 and they are distributed on the cavity along the length direction of the cavity. First through holes and second through holes are respectively formed on the upper and lower sides of the vertical plate. A filter screen is arranged on the first through hole. An opening penetrating the cavity is vertically opened on the cavity. The vertical plate is located in the opening and forms a moving pair with the cavity in the vertical direction. The limiting plates are respectively located at the upper and lower ends of the vertical plate and are fixed to the vertical plate. The gasket is sleeved on the vertical plate and is located between the vertical plate and the cavity. Bolts pass through the limiting plate and the gasket and can be threadedly connected with the cavity.

[0006] To optimize the above technical solution, the further measure taken is: The number of filtering units is 2 and they are symmetrically distributed on the front and rear sides of the cavity. The double filtering units filter the granulator alternately, which can reduce the loss caused by production stoppage due to cleaning and replacing the filter screen.

[0007] As a further improvement of the above technical solution: A limiting ring is detachably arranged in the circumferential direction of the first through hole. The limiting ring presses the filter screen to fix the filter screen on the first through hole, ensuring that the filter screen can be replaced in time when it is damaged.

[0008] As a further improvement of the technical solution: The bolt passes through the limiting ring and is threadedly connected with the vertical plate to realize the detachable connection between the first through hole and the limiting ring. The threaded connection is convenient, fast and has good working stability.

[0009] As an improvement to the foregoing technical solution: gaskets are sleeved on both the upper end and the lower end of the vertical plate. Setting gaskets at both the upper and lower ends of the vertical plate can ensure the sealing between the opening and the vertical plate during the normal operation of the filter screen and the process of replacing the filter screen, thus avoiding leakage.

[0010] As can be seen from the above description of the structure of the present utility model, compared with the prior art, the present utility model has the following advantages:

[0011] A granulator filtering device provided by the present utility model respectively arranges filtering units on both the front and rear sides of the cavity. When it is necessary to maintain, clean or replace the filter screen, only move the adjacent filtering unit so that the filter screen of the adjacent filtering unit performs the filtering function, and move the vertical plate of the filtering unit that needs to be maintained, cleaned or replaced, then the filter screen can be moved to the outside of the cavity. During this process, there is no need to stop production, which will not affect the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0013] Figure 1 is a three-dimensional structure schematic diagram of the present utility model (left side view);

[0014] Figure 2 is a three-dimensional structure schematic diagram of the present utility model (right side view);

[0015] Figure 3 is a three-dimensional structure schematic diagram of the vertical plate;

[0016] In the figure: cavity - 1, connection end - 101, filtering unit - 2, vertical plate - 201, limiting plate - 202, gasket - 203, first through hole - 204, second through hole - 205, filter screen - 206, opening - 207, limiting ring - 208 DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0018] Embodiment

[0019] Please refer to Figure 1-2, the present utility model provides a granulator filtering device, which includes a cavity 1 and a filtering unit 2. Connection ends 101 are respectively formed at the front and rear ends of the cavity 1, and the connection ends 101 are communicated with the inside of the cavity 1. The number of the filtering units 2 is 2, and they are symmetrically distributed on the front and rear sides of the cavity 1 along the length direction of the cavity 1. The connection ends 101 here are used to connect with the granulator barrel and the extrusion port.

[0020] The filtering unit 2 includes a vertical plate 201, a limiting plate 202 and a gasket 203. First through holes 204 and second through holes 205 are respectively formed on the upper and lower sides of the vertical plate 201. A filter screen 206 is arranged on the first through hole 204. A limiting ring 208 is detachably arranged in the circumferential direction of the first through hole 204. The limiting ring 208 presses the filter screen 206 to fix the filter screen 206 on the first through hole 204. A bolt passes through the limiting ring 208 and is threadedly connected with the vertical plate 201 to realize the detachable connection between the first through hole 204 and the limiting ring 208. An opening 207 penetrating the cavity 1 is vertically formed on the cavity 1. The vertical plate 201 is located in the opening 207 and forms a moving pair with the cavity 1 in the vertical direction. The limiting plates 202 are respectively located at the upper and lower ends of the vertical plate 201 and are fixed to the vertical plate 201. The gasket 203 is sleeved on the vertical plate 201 and is located between the vertical plate 201 and the cavity 1. Gaskets 203 are sleeved on both the upper end and the lower end of the vertical plate 201. The bolt passes through the limiting plate 202 and the gasket 203 and can be threadedly connected with the cavity 1.

[0021] The purpose of setting the gasket 203 is to improve the sealing performance between the opening 207 and the vertical plate 201 to avoid leakage. The gasket 203 belongs to the prior art content and is well known to those skilled in the art. Therefore, no further explanation will be made on the specific material and specific structure of the gasket 203.

[0022] Working principle: The connection ends 101 at both ends of the cavity 1 are respectively connected with the granulator and the extrusion port. The viscous molten plastic can flow in the cavity 1 through the connection ends 101. During the above process, the impurities contained in the plastic can be blocked by the filter screen 206 on the first through hole 204 to achieve the filtering purpose.

[0023] When the filter screen 206 on the first through hole 204 needs to be maintained, cleaned or replaced, the operator moves the vertical plate 201 of the adjacent filtering unit 2 so that the first through hole 204 moves into the cavity 1. At this time, the filter screen 206 of this adjacent filtering unit 2 can perform the filtering function to filter the molten plastic. Subsequently, the operator can unscrew the bolt on the filtering unit 2 that needs to clean, maintain or replace the filter screen 206 to separate the limiting plate 202 from the cavity 1. The operator can move the vertical plate 201 of this filtering unit 2 so that the first through hole 204 of the vertical plate 201 moves to the outside of the cavity 1. At this time, the second through hole 205 is located inside the cavity 1 and will not affect the flow of the molten plastic, while the first through hole 204 is located outside the cavity 1, which is convenient for the operator to maintain, clean or replace the filter screen 206 on the first through hole 204.

[0024] Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A granulator filter device, characterized in that: It comprises a cavity (1) and a filtering unit (2); The cavity (1) is provided with connection ends (101) at both ends, and the connection ends (101) are connected to the interior of the cavity (1). The number of the filter units (2) is at least 2 and they are distributed on the cavity (1) along the length direction of the cavity (1); The filter unit (2) comprises a vertical plate (201), a limiting plate (202) and a gasket (203); A first through hole (204) and a second through hole (205) are respectively formed on the upper and lower sides of the vertical plate (201); a filter screen (206) is arranged on the first through hole (204); an opening (207) penetrating the cavity (1) is vertically opened on the cavity (1); the vertical plate (201) is located in the opening (207) and forms a movable pair with the cavity (1) in the vertical direction; The limiting plates (202) are respectively located at the upper and lower ends of the vertical plate (201) and are fixed to the vertical plate (201); The gasket (203) is sleeved on the vertical plate (201) and is located between the vertical plate (201) and the cavity (1). The bolt passes through the limiting plate (202), and the gasket (203) can be threadedly connected with the cavity (1).

2. A granulator filter device according to claim 1, characterized in that: The number of the filter units (2) is 2 and they are symmetrically distributed on the front and rear sides of the cavity (1).

3. A granulator filter device according to claim 1, characterized in that: A limiting ring (208) is detachably provided around the first through hole (204), and the limiting ring (208) squeezes the filter screen (206) to fix the filter screen (206) on the first through hole (204).

4. A granulator filter device according to claim 3, characterized in that: The bolt passes through the limiting ring (208) and is threadedly connected to the vertical plate (201) to achieve a detachable connection between the first through hole (204) and the limiting ring (208).

5. A granulator filter device according to any one of claims 1 to 4, characterized in that: The upper end of the vertical plate (201) and the lower end of the vertical plate (201) are both sleeved with gaskets (203).

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