Screening device with self-cleaning function

Abstract

The utility model discloses a screening device with a self-cleaning function, which belongs to the technical field of screening devices and comprises a vibrating screening machine, the vibrating screening machine comprises a vibrating base, a screening bin is arranged on the vibrating base, a screen is arranged in the screening bin, and a coarse material outlet and a fine material outlet are respectively arranged on the screening bin and positioned on the upper side and the lower side of the screen. A self-cleaning mechanism is arranged at the position, located on the lower side of the screen, in the screening bin, and a knocking mechanism is arranged on the self-cleaning mechanism, the problem of screen blocking can be better solved through intermittent blowing and knocking of the screen in each stroke, and automatic cleaning of the screen is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of screening devices, in particular to a screening device with a self-cleaning function. Background Art

[0002] During the production process, epoxy resin powder needs to be screened according to actual needs. The epoxy resin powder passes through the screen in the vibrating screening machine and is screened into epoxy resin powder of different mesh sizes through the vibrating screen. However, the screen will become clogged after long-term use, making the screen unusable. The existing technology uses an air pump to blow the screen in the opposite direction to separate the clogged powder from the mesh, unblock the screen, and achieve the purpose of cleaning the screen. However, the surface of the newly produced epoxy resin powder has a slight stickiness, and the effect of relying solely on the air pump is not good. The problem of screen clogging still exists, which affects the screening of the powder. Utility Model Content

[0003] In order to solve the technical problems mentioned in the above background technology, the present invention provides a screening device with a self-cleaning function, and the technical solution adopted is as follows:

[0004] It includes a vibrating screening machine, which includes a vibrating base. A screening bin is provided on the vibrating base, a screen is provided in the screening bin, a coarse material discharge port and a fine material discharge port are respectively provided on the upper and lower sides of the screen, a self-cleaning mechanism is provided on the lower side of the screen in the screening bin, and a knocking mechanism is provided on the self-cleaning mechanism.

[0005] Preferably, the self-cleaning mechanism includes an air jet chamber, and knocking mechanisms are evenly distributed on the upper part of the air jet chamber along the circumferential direction.

[0006] Preferably, an air hole is provided on the jet chamber, and the knocking mechanism seals the air hole.

[0007] Preferably, a hose is connected to the jet chamber, the hose seal runs through the screening chamber, and an air pump is provided on the hose.

[0008] Preferably, the knocking mechanism includes a fixed plate evenly distributed on the jet chamber along the circumferential direction, an axle seat is provided on the fixed plate, a rotating shaft is rotatably connected to the axle seat, a connecting rod is provided on the rotating shaft, a hollow ball is provided on the connecting rod, and the hollow ball forms a seal with the air hole.

[0009] Preferably, the upper portion of the jet chamber is conical, so that the epoxy resin powder falling on the jet chamber after screening can slide into the screening chamber.

[0010] The utility model has the following advantages: the self-cleaning mechanism performs a stroke on the screen at regular intervals, and sprays gas every 3 seconds during each stroke. Each stroke lasts for 3 minutes, so that the upper part of the self-cleaning mechanism is opened, and the gas comes out to spray the screen. At the same time, the gas also blows the knocking mechanism, and the knocking mechanism knocks on the screen at the same time, and then falls down as the gas stops blowing, and this is repeated several times. The utility model can better solve the problem of screen blockage and realize automatic cleaning of the screen by intermittently spraying and knocking the screen during each stroke. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a structural diagram of the utility model in an uncleaned state;

[0012] Figure 2 For this utility model Figure 1 A local enlarged view of point a in the middle;

[0013] Figure 3 This is a structural diagram of the cleaning state of the utility model;

[0014] Figure 4 This is a top view of the self-cleaning mechanism of the utility model;

[0015] Figure 5 This utility model Figure 4 A partial enlarged view of point b in the middle.

[0016] Attached figure: 1 screening machine, 2 vibrating base, 3 screening bin, 4 screen, 5 coarse material discharge port, 6 fine material discharge port, 7 jet bin, 8 air hole, 9 hose, 10 air pump, 11 fixing plate, 12 shaft seat, 13 rotating shaft, 14 connecting rod, 15 hollow ball. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] like Figure 1-5As shown: The utility model provides a screening device with a self-cleaning function, including a vibrating screening machine 1, the vibrating screening machine 1 includes a vibrating base 2, a screening bin 3 is provided on the vibrating base 2, the vibration of the vibrating base 2 drives the vibration of the screening bin 3, a screen 4 is provided in the screening bin 3, the vibration of the screening bin 3 drives the screen 4 to vibrate, and the screening bin 3 is provided with a coarse material discharge port 5 and a fine material discharge port 6 on the upper and lower sides of the screen 4 respectively. The epoxy resin powder enters the screening bin 3 through the upper part of the screening bin 3 and falls on the screen 4. As the screen 4 vibrates, the finer epoxy resin powder passes through the screen 4 and falls on the screening The bottom of the bin 3 is blown out through the fine material discharge port 6, while the particles on the upper part of the screen 4 that have not passed through the screen 4 are blown out through the coarse material discharge port 5. A self-cleaning mechanism is provided at the lower side of the screen 4 in the screening bin 3, and a knocking mechanism is provided on the self-cleaning mechanism. Every once in a while, the self-cleaning mechanism performs a stroke on the screen 4. Each stroke, the self-cleaning mechanism sprays gas every 3 seconds, and each stroke lasts for 3 minutes, so that the upper part of the self-cleaning mechanism is opened, and the gas comes out to spray the screen 4. At the same time, the gas also blows the knocking mechanism, and the knocking mechanism knocks on the screen 4 at the same time, and then falls down as the gas stops blowing, and this is repeated several times.

[0019] The self-cleaning mechanism includes an air jet chamber 7 , and knocking mechanisms are evenly distributed on the upper part of the air jet chamber 7 along the circumferential direction. High-pressure gas enters the air jet chamber 7 and then hits the knocking mechanism.

[0020] An air hole 8 is provided on the jet chamber 7, and the knocking mechanism seals the air hole 8. When the screen 4 is not cleaned, the knocking mechanism and the air hole 8 remain sealed. When self-cleaning, high-pressure gas passes through the air hole 8 to hit the knocking mechanism.

[0021] A hose 9 is connected to the jet bin 7, and the hose 9 is sealed and passes through the screening bin 3. An air pump 10 is provided on the hose 9, and the air pump 10 delivers high-pressure gas through the hose 9 into the screening bin 3. The hose 9 is used to prevent the hose 9 from being affected by the vibration when the screening bin 3 screens the epoxy resin powder.

[0022] The knocking mechanism includes a fixed plate 11 evenly distributed on the jet chamber 7 along the circumferential direction, and an axle seat 12 is provided on the fixed plate 11. The axle seat 12 is fixed on the fixed plate 11. A rotating shaft 13 is rotatably connected to the axle seat 12, and a connecting rod 14 is provided on the rotating shaft 13. A hollow ball 15 is provided on the connecting rod 14. When the hollow ball 15 is blown up by the high-pressure gas, the hollow ball 15 drives the connecting rod 14 and the rotating shaft 13, and the rotating shaft 13 rotates on the axle seat 12, and the hollow ball 15 forms a seal with the air hole 8.

[0023] The working principle of this utility model is as follows:

[0024] At intervals, the vibrating screening machine 1 stops, the air pump 10 is turned on, and the high-pressure gas enters the jet chamber 7 through the hose 9. The gas pushes the hollow ball 15 through the air hole 8, and the hollow ball 15 drives the connecting rod 14 and the rotating shaft 13. The rotating shaft 13 rotates in the shaft seat 12. While the gas is spraying the screen 4, the hollow ball 15 also hits the screen 4, so that the epoxy resin powder blocked in the screen 4 is knocked loose and then flushed by the high-pressure airflow, so that the blocked screen 4 is cleaned. Each gas impact lasts for 3 seconds and then the air pump 10 is cut off. Since the connecting rod 14 drives the hollow ball 15 to knock on the screen 4 at an inclined angle, the hollow ball 15 falls naturally under the action of gravity when the gas is cut off, and then is rushed up to hit the screen 4 again. One stroke lasts for 3 minutes. It is worth noting that when the screen 4 is not clean, the hollow ball 15 is blocked on the air hole 8, preventing the screen 4 from screening the epoxy resin powder and the falling powder from entering the jet chamber 7 through the air hole 8.

[0025] The present invention is simple to operate and easy to use, and is suitable for comprehensive promotion and application. Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A screening device with a self-cleaning function, comprising a vibrating screening machine (1), the vibrating screening machine (1) comprising a vibrating base (2), a screening bin (3) provided on the vibrating base (2), a screen (4) provided in the screening bin (3), a coarse material discharge port (5) and a fine material discharge port (6) provided on the upper and lower sides of the screen (4) on the screening bin (3), characterized in that: A self-cleaning mechanism is provided in the screening bin (3) below the screen (4), and a knocking mechanism is provided on the self-cleaning mechanism.

2. A screening device with a self-cleaning function according to claim 1, characterized in that: The self-cleaning mechanism comprises an air jet chamber (7), and knocking mechanisms are evenly distributed on the upper part of the air jet chamber (7) along the circumferential direction.

3. A screening device with a self-cleaning function according to claim 2, characterized in that: An air hole (8) is provided on the jet chamber (7), and the knocking mechanism seals the air hole (8).

4. A screening device with a self-cleaning function according to claim 2, characterized in that: A hose (9) is connected to the jet chamber (7), the hose (9) is sealed and passes through the screening chamber (3), and an air pump (10) is provided on the hose (9).

5. The screening device with self-cleaning function according to claim 3, characterized in that: The knocking mechanism comprises a fixing plate (11) uniformly distributed on the jet chamber (7) along the circumferential direction, a shaft seat (12) is provided on the fixing plate (11), a rotating shaft (13) is rotatably connected to the shaft seat (12), a connecting rod (14) is provided on the rotating shaft (13), a hollow ball (15) is provided on the connecting rod (14), and the hollow ball (15) forms a seal with the air hole (8).

6. The screening device with self-cleaning function according to claim 1, characterized in that: The upper part of the jet chamber (7) is conical.

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