A dustproof structure for a circular vibrating screen

Abstract

This utility model relates to the field of dust prevention technology, specifically a dust prevention structure for a circular vibrating screen. It includes a housing 12 located at the channel outlet below the circular vibrating screen body 11 and support feet for supporting the housing 12. The housing 12 has dust prevention channels 13 matching the number of channels on the circular vibrating screen body 11. The dust prevention components include a first dustproof plate 16 separating two adjacent dust prevention channels 13 and two second dustproof plates 15. This utility model uses several dust prevention channels 13 on the housing 12 to allow material particles discharged from the channel outlet of the circular vibrating screen body 11 to move and be guided to a designated location for collection. After the material is discharged from the circular vibrating screen body 11, the dust prevention components on the dust prevention channels 13 blow up dust from below and then suck in the blown-up dust from above, thereby discharging small particles of dust adhering to the surface of large particles.

Description

Technical Field

[0001] This utility model relates to the field of dust prevention technology, specifically a dust prevention structure for a circular vibrating screen. Background Technology

[0002] A screening machine is a vibrating screening machine that uses the relative motion between granular materials and the screen surface to allow some particles to pass through the screen holes, separating materials such as sand, gravel, and crushed stone into different grades according to particle size. A circular vibrating screen is a type of screening machine. Because its motion trajectory is approximately circular, it is simply called a circular vibrating screen. It is a multi-layered, high-efficiency new type of vibrating screen, mainly composed of a screen box, vibrator, motor, and support. The screen box is equipped with a screen mesh. After the raw material to be screened falls into the screen mesh, the screen mesh vibrates. Under the combined action of gravity and the excitation force of the circular vibrating screen, the material moves downwards in a "point vibration" motion, thus achieving the screening function.

[0003] However, since the material being screened contains particles of various sizes and diameters, especially some fine dust, which will adhere to the surface of the large particles, when the material is screened and comes out of the outlet of the circular vibrating screen, the falling material will be impacted, and the small dust particles attached to the surface of the large particles will be shaken off and scattered in the air, thus forming dust.

[0004] Therefore, a dustproof structure for circular vibrating screens is needed to solve the dust problem. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a dustproof structure for a circular vibrating screen.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A dustproof structure for a circular vibrating screen includes a housing located at the channel outlet at the lower side of the circular vibrating screen body and support feet for supporting the housing. The housing has dustproof channels matching the number of channels on the circular vibrating screen body. One end of each dustproof channel opens vertically downwards, and the other opening is angled upwards and directly opposite the outlet of the channel on the circular vibrating screen body. Several upwardly angled openings of the dustproof channels are equipped with dustproof features to blow up the material inside the dustproof channels and absorb the dust. The dustproof assembly includes a first dustproof plate separating two adjacent dustproof channels and two second dustproof plates. The two dustproof plates are located on the top wall of the uppermost dustproof channel and the bottom wall of the lowermost dustproof channel, respectively. The first and second dustproof plates are provided with air pressure chambers facing the nearest dustproof channel. The opening of the air pressure chamber is provided with a partition plate. The side wall of the air pressure chamber is connected to a connecting air duct. The connecting air duct connected to the air pressure chamber with its opening facing upward provides positive pressure, and the connecting air duct connected to the air pressure chamber with its opening facing downward provides negative pressure.

[0007] By adopting the above technical solution, positive pressure is provided into the dust-proof channel through holes in the partition plate by the upward-opening air pressure chamber, and negative pressure is provided into the dust-proof channel through holes in the partition plate by the downward-opening air pressure chamber. This creates a directional airflow at the upward-sloping opening of the dust-proof channel, which carries away dust and prevents dust from being raised. In addition, the blown airflow blows away the material and removes small particles (dust) on it, further increasing the dust-proofing effect.

[0008] The present invention is further configured such that: the connecting air duct that communicates with the upward-opening air pressure chamber is located at the rear of the housing, and the connecting air duct located at the rear of the housing is connected to the positive air pressure duct of the outside; the connecting air duct that communicates with the upward-opening air pressure chamber is located at the front of the housing, and the connecting air duct located at the front of the housing is connected to the negative air pressure duct of the outside.

[0009] By adopting the above technical solution, and by setting up a structure that applies negative and positive pressure to the connecting ducts at the front and rear, the external negative pressure duct is set at the rear of the shell, and the external positive pressure duct is set at the front of the shell, which facilitates differentiation and installation. At the same time, several connecting ducts at the front can be connected to the external positive pressure duct through the same pipe, and similarly, the connecting ducts at the rear are connected to the same pipe and then to the external negative pressure duct.

[0010] The present invention is further configured such that: the connecting duct includes a main duct, a plurality of connecting pipes connected to the side wall of the main duct and arranged in an array, and an external ventilation duct connected to the side wall of the main duct and disposed on the opposite side of the connecting pipes, wherein the connecting pipes are connected to the air pressure chamber.

[0011] By adopting the above technical solution, negative or positive pressure is applied evenly to the air pressure chamber using several connecting pipes, which can greatly reduce the airflow differences through the holes of each partition plate, thereby increasing the dust suppression effect.

[0012] The present invention is further configured such that the mesh size of the separator plate is smaller than the minimum screening diameter of the circular vibrating screen body.

[0013] By adopting the above technical solution and utilizing the size of the mesh size of the separator screen, material particles that do not meet the screening requirements (mainly various small particle diameters that have not been screened) can be further drawn away by the airflow and further screened, while also suppressing dust.

[0014] The present invention is further configured such that the partition plates located at the upper and lower positions of the same dust-proof channel are arranged opposite each other.

[0015] By adopting the above technical solution and utilizing the position setting of the partition plate, the suction direction of negative pressure and positive pressure coincides with the blowing direction, thereby increasing the airflow effect and further enhancing the adsorption effect on small particulate materials (including dust and small diameter material particles).

[0016] In summary, this utility model has the following beneficial effects: Several dust-proof channels on the shell allow material particles discharged from the main channel outlet of the circular vibrating screen to move and be guided to a designated location for collection. After the material is discharged from the main body of the circular vibrating screen, the dust-proof components on the dust-proof channels blow the dust off the material from below and then suck the blown dust in from above. This process removes small dust particles adhering to the surface of large particles, reducing subsequent dust generation, thus reducing dust pollution, increasing the cleanliness of the working environment, and protecting the health of workers. Attached Figure Description

[0017] Figure 1 This is a schematic diagram showing the interaction between the present invention and the circular vibrating screen body; Figure 2 This is a schematic diagram of the structure of this utility model; Figure 3 This is a schematic diagram of the shell structure in this utility model; Figure 4 This is a schematic diagram of the structure of the second dustproof plate in this utility model; Figure 5 This is a schematic diagram of the structure of the first dustproof plate in this utility model; Figure 6 This is a schematic diagram of the partition plate in this utility model.

[0018] In the picture: 11. Circular vibrating screen body; 12. Shell; 13. Dust prevention channel; 15. Second dust prevention plate; 16. First dust prevention plate; 17. Air pressure chamber; 18. Connecting pipe; 19. Divider plate; 20. Connecting air duct. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings of the embodiments thereof.

[0020] Example: This type of circular vibrating screen uses a dustproof structure, such as Figures 1 to 3As shown, the system includes a housing 12 located at the channel outlet at the lower part of the circular vibrating screen body 11 and support feet for supporting the housing 12. The housing 12 has dust-proof channels 13 matching the number of channels on the circular vibrating screen body 11. One end of each dust-proof channel 13 opens vertically downwards, and the other opening is angled upwards and directly opposite the channel outlet on the circular vibrating screen body 11. Dust-proof components are provided at the upward-sloping openings of several dust-proof channels 13 to blow up the material inside the channels and absorb dust. The dust-proof components include those separating adjacent dust-proof channels 13. A first dustproof plate 16 and two second dustproof plates 15 are respectively located on the top wall of the uppermost dustproof channel 13 and the bottom wall of the lowermost dustproof channel 13. The first dustproof plate 16 and the second dustproof plate 15 are provided with wind pressure chambers 17 facing the nearest dustproof channel 13. The opening of the wind pressure chamber 17 is provided with a partition plate 19. The side wall of the wind pressure chamber 17 is connected to a connecting air duct 20. The connecting air duct 20 connected to the upward-opening wind pressure chamber 17 provides positive pressure, and the connecting air duct 20 connected to the downward-opening wind pressure chamber 17 provides negative pressure.

[0021] like Figures 3 to 6 As shown, the connecting duct 20, which is connected to the upward-opening air pressure chamber 17, is located behind the housing 12 and is connected to the positive air pressure duct of the outside. The connecting duct 20, which is connected to the upward-opening air pressure chamber 17, is located in front of the housing 12 and is connected to the negative air pressure duct of the outside. The connecting duct 20 includes a main duct, several connecting pipes 18 that are connected to the side wall of the main duct and arranged in an array, and an external ventilation duct that is connected to the side wall of the main duct and is located on the opposite side of the connecting pipes 18. The connecting pipes 18 are connected to the air pressure chamber 17. The mesh size of the partition plate 19 is smaller than the minimum screening diameter of the circular vibrating screen body 11. The partition plates 19 located at the same vertical position of the dust prevention channel 13 are arranged opposite each other.

[0022] After the circular vibrating screen body 11 first screens the material (crushed stone), materials of different sizes are discharged from different heights at the lower opening of the circular vibrating screen body 11. The shell 12 is placed at the lower opening of the circular vibrating screen body 11, and the various dust-proof channels 13 on the shell 12 are aligned with different heights of the circular vibrating screen body 11. The dust-proof channels 13 are slightly lower than the channel openings on the circular vibrating screen body 11 (the distance is determined according to the speed of the material flowing out of the circular vibrating screen body 11 and the parabolic trajectory of its ejection), so that the material ejected from the circular vibrating screen body 11 can enter the corresponding dust-proof channel 13. Then, the connecting air pipe 20 at the rear of the shell 12 is connected to the external positive air pressure air pipe, and positive pressure is provided to the upward-opening air pressure chamber 17 through the connecting air pipe 20. The connecting air pipe 20 at the rear of the shell 12 is connected to the external negative air pressure air pipe and... Negative pressure is provided to the downward-opening air pressure chamber 17 through the connecting air duct 20, so that an airflow perpendicular to its center line and upward is formed at the upward-sloping opening of the dust prevention channel 13, which blows up and sucks away the dust on the surface of large particles and scattered dust, thereby preventing dust. When the material enters the dust prevention channel 13, it first contacts the bottom wall of the dust prevention channel 13, that is, the partition plate 19 at the upper end of the first dustproof plate 16 and the lowest second dustproof plate 15. On the one hand, the material colliding with the partition plate 19 causes the dust on the surface of the material to be shaken off due to vibration, and then the dust is carried away by the airflow. At the same time, the shell 12 that partially encloses the material can prevent the dust from spreading to other places. In particular, by using several connecting pipes 18 to uniformly apply negative or positive pressure to the air pressure chamber 17, the airflow difference through the holes of each partition plate 19 can be greatly reduced, thereby increasing the dust suppression effect. Furthermore, the structural design of the first dustproof plate 16, with a wind pressure chamber 17 on each of its upper and lower surfaces (one wind pressure chamber 17 opening upwards and the other opening downwards), reduces the space occupied by the equipment when negative and positive pressure are required. The connection between the second dustproof plate 15, the first dustproof plate 16, and the inner cavity of the housing 12 can be welded for a fixed connection, or it can be a detachable connection (including but not limited to: 1. using a threaded connection to create threaded holes on the front and rear walls of the second dustproof plate 15 and the first dustproof plate 16 away from the wind pressure chamber 17, and through holes on the front and rear positions of the dust-proof channel 13, then using screws to pass through the through holes and threadedly connect to the threaded holes, thereby connecting the second dustproof plate 15, the first dustproof plate 16, and the inner cavity of the dust-proof channel 13; 2. ... ... A left-right extending protrusion is fixedly connected to the front and rear walls of the first dustproof plate 16, and a left-right extending groove is opened on the front and rear inner walls of the dustproof channel 13. The second dustproof plate 15, the first dustproof plate 16 and the inner wall of the dustproof channel 13 are connected by sliding the protrusion into the groove. At the same time, the partition plate 19 can be connected to the second dustproof plate 15 and the first dustproof plate 16 by welding or threaded connection. The connection methods are the same as described above (1. Threaded holes are opened on the upper or lower surface of the wind pressure chamber 17 of the second dustproof plate 15 and the first dustproof plate 16, and through holes are opened on the partition plate 19. Screws are passed through the through holes and threadedly connected to the threaded holes to realize the connection between the partition plate 19 and the second dustproof plate 15 and the first dustproof plate 16; 2. The partition plate 19 is directly welded to the second dustproof plate 15 and the first dustproof plate 16 to complete the connection).

[0023] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A dust-proof structure for a circular vibrating screen, comprising a housing (12) provided at a passage outlet obliquely below a body (11) of the circular vibrating screen, and a support leg for supporting the housing (12), characterized in that: The housing (12) is provided with dust-proof channels (13) matching the number of channels on the circular vibrating screen body (11). One end of the dust-proof channel (13) opens vertically downward, and the other end of the dust-proof channel (13) opens obliquely upward and faces the outlet of the channel on the circular vibrating screen body (11). Dust-proof components are provided at the obliquely upward openings of several dust-proof channels (13) to blow up the material in the dust-proof channel (13) and absorb the dust. The dustproof assembly includes a first dustproof plate (16) separating two adjacent dustproof channels (13) and two second dustproof plates (15). The two dustproof plates are located on the top wall of the uppermost dustproof channel (13) and the bottom wall of the lowermost dustproof channel (13), respectively. The first dustproof plate (16) and the second dustproof plate (15) are provided with wind pressure chambers (17) facing the nearest dustproof channel (13). The opening of the wind pressure chamber (17) is provided with a partition plate (19). The side wall of the wind pressure chamber (17) is connected to a connecting air duct (20). The connecting air duct (20) connected to the upward-opening wind pressure chamber (17) provides positive pressure, and the connecting air duct (20) connected to the downward-opening wind pressure chamber (17) provides negative pressure.

2. The dustproof structure for a circular vibrating screen according to claim 1, characterized in that: The connecting duct (20) connected to the upward-opening air pressure chamber (17) is located behind the shell (12), and the connecting duct (20) located behind the shell (12) is connected to the positive air pressure duct of the outside. The connecting duct (20) connected to the upward-opening air pressure chamber (17) is located in front of the shell (12), and the connecting duct (20) located in front of the shell (12) is connected to the negative air pressure duct of the outside.

3. The dustproof structure for a circular vibrating screen according to claim 1, characterized in that: The connecting duct (20) includes a main duct, a number of connecting pipes (18) that are connected to the side wall of the main duct and arranged in an array, and an external ventilation pipe that is connected to the side wall of the main duct and is located on the opposite side of the connecting pipe (18). The connecting pipe (18) is connected to the air pressure chamber (17).

4. The dustproof structure for a circular vibrating screen according to claim 1, characterized in that: The mesh size of the separator plate (19) is smaller than the minimum screening diameter of the circular vibrating screen body (11).

5. The dustproof structure for a circular vibrating screen according to claim 1, characterized in that: The partitions (19) located above and below the same dust-proof passage (13) are set directly opposite each other.

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