Air vent for vibrating screen

Abstract

This invention belongs to the field of vibrating screen ventilation technology, and relates to a ventilator for vibrating screens. It includes a housing, within which a second splash guard is installed. The second splash guard has splash guard holes. The upper part of the housing is connected to the lower part of a ventilation pipe. A filter element is arranged around the upper part of the ventilation pipe, and the filter element is enclosed in a cap. A ventilation chamber is located in the middle of the ventilation pipe, and filter holes are provided on the wall of the ventilation chamber corresponding to the filter element. This invention has a simple structure and reasonable design, achieving both ventilation and good dust isolation, while also preventing lubricating oil from splashing out of the equipment during operation.

Description

Technical Field

[0001] This invention relates to an air vent for a vibrating screen, belonging to the field of vibrating screen ventilation technology. Background Art

[0002] Vibrating screens, as crucial equipment in mining and non-metallic mineral production, are characterized by high dust levels and heavy loads. Therefore, lubricating oil is often used to lubricate their bearings to extend equipment lifespan and reduce maintenance costs. Furthermore, due to the significant impact of the equipment, vents are installed on the vibrating screen. These vents must maintain pressure balance between the screen and atmospheric pressure, and in high-dust environments, they must also effectively isolate dust. Current technology only allows vents to maintain pressure balance within the screen; they cannot adequately isolate dust. Additionally, the impact during operation often causes lubricating oil to splash outside the equipment, resulting in contamination or insufficient lubrication within the screen, significantly impacting its lifespan. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a ventilator for a vibrating screen, which can not only achieve ventilation, but also achieve a good dust isolation effect, and at the same time prevent lubricating oil from splashing out of the equipment during operation.

[0004] The air vent for vibrating screens of the present invention includes a housing, a second anti-splash sleeve installed inside the housing, the second anti-splash sleeve having an anti-splash through hole, the upper part of the housing being connected to the lower part of an air vent pipe, a filter element being arranged around the upper part of the air vent pipe, the filter element being covered by a cap, an air vent chamber being provided in the middle of the air vent pipe, and air filtration holes being provided on the wall of the air vent chamber corresponding to the filter element.

[0005] During operation, the temperature and internal pressure of the vibrating screen continuously increase. Gas then passes through the casing, vent pipe, and filter element to reach the outside of the equipment, achieving a balance between the internal and external pressures. When the vibrating screen stops working, the temperature and internal pressure decrease. External gas first passes through the filter element for purification, then enters the vibrating screen through the vent pipe, casing, and splash guard. This device stabilizes the internal and external pressure balance while preventing external dust from entering and contaminating the lubricating oil. During operation, due to the significant impact, the lubricating oil inside the screen is splashed into the vent. The lubricating oil is then blocked by the splash guard and flows back into the screen. The casing and vent pipe can be connected using an interference fit and external spot welding. This connection method ensures both connection strength and the airtightness of the main body, preventing external air from entering the vibrating screen without passing through the filter element, thus improving dust isolation.

[0006] Preferably, an external threaded seat is installed at the lower part of the housing, and the lower outer circumference of the external threaded seat is provided with external threads. The external threaded seat is connected to the threaded hole on the vibrating screen, ensuring a stable connection during use and facilitating the replacement of the air breather. Teflon tape can be wrapped around the external threaded seat to further achieve a sealing effect at the connection. The external threaded seat and the housing can be connected by an interference fit and spot welding, ensuring both connection strength and sealing at the connection.

[0007] Preferably, the second anti-splash sleeve is an inverted truncated cone shell sleeve. The outer ring of the inner bottom surface of the inverted truncated cone shell sleeve has an annular groove, and the annular groove has several anti-splash through holes. The bottom surface of the second anti-splash sleeve, corresponding to the oil splash holes of the vibrating screen, is planar and closed. Most of the lubricating oil splashed from the vibrating screen is reflected back by the bottom surface or conical surface of the second anti-splash sleeve. A small amount of lubricating oil passes through the anti-splash through holes and falls into the annular groove. The lubricating oil collected in the annular groove flows back into the vibrating screen through the anti-splash through holes, effectively preventing lubricating oil leakage. The main function of the anti-splash through holes is to ensure smooth gas passage and maintain the air pressure balance inside and outside the vibrating screen. The second anti-splash sleeve can be connected to the inner wall of the shell by welding or other methods.

[0008] Preferably, a first splash guard is provided below the second splash guard. The first splash guard is inverted conical shape, and a vent hole is provided at the center of its bottom. The diameter of the vent hole is smaller than the diameter of the bottom surface of the inverted conical shell. The first splash guard extends the path of lubricating oil splashing, thus preventing a large amount of lubricating oil from splashing into the device. On the other hand, the first splash guard can block some of the splashed lubricating oil, allowing some of it to flow back into the vibrating screen along the conical wall of the first splash guard. A small portion of the lubricating oil that splashes out of the first splash guard through the vent hole is blocked by the bottom surface of the second splash guard and returns to the vibrating screen, effectively preventing the lubricating oil in the vibrating screen from overflowing and ensuring sufficient lubricating oil in the vibrating screen.

[0009] Preferably, a vent plate is added to the bottom of the filter element. The vent plate is circular and fixedly connected to the cap body. Several through holes are evenly distributed on the vent plate. The function of the through holes is to allow gas to pass through and maintain the pressure balance inside and outside the vibrating screen; the vent plate can reliably fix the filter element.

[0010] Preferably, both the cap and the upper center of the ventilator are provided with threaded holes, and the threaded holes of the cap and the ventilator are connected by screws, which facilitates the assembly and disassembly of the cap and the ventilator.

[0011] The beneficial effects of this invention compared to the prior art are:

[0012] The present invention has a simple structure and reasonable design. It can achieve both ventilation and good dust isolation, while also preventing lubricating oil from splashing out of the equipment during operation and ensuring sufficient lubricating oil inside the vibrating screen. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of an air vent for a vibrating screen;

[0014] Figure 2 yes Figure 1 AA section Figure 1 ;

[0015] Figure 3 yes Figure 1 AA section Figure 2 ;

[0016] Figure 4 yes Figure 1 AA section Figure 3 ;

[0017] Figure 5 This is a schematic diagram of the splash guard II structure;

[0018] Figure 6 This is a schematic diagram of the structure at the vent pipe and vent plate.

[0019] In the diagram: 1. External thread seat; 2. Housing; 3. Cap; 4. Splash guard one; 5. Splash guard two; 6. Vent plate; 7. Filter element; 8. Screw; 9. Vent pipe; 10. Vent hole; 11. Splash guard through hole; 12. Annular groove; 13. Filter hole. Detailed Implementation

[0020] The present invention will now be further described with reference to the accompanying drawings:

[0021] like Figures 1-6 The air vent for the vibrating screen of the present invention includes a housing 2, a splash guard 5 installed inside the housing 2, a splash guard 5 having a splash guard hole 11, the upper part of the housing 2 being connected to the lower part of the air vent pipe 9, a filter element 7 being arranged around the upper part of the air vent pipe 9, the filter element 7 being covered in the cap 3, an air venting chamber being provided in the middle of the air vent pipe 9, and air filter holes 13 being provided on the wall of the air venting chamber corresponding to the filter element 7.

[0022] In this embodiment:

[0023] An external threaded seat 1 is installed at the lower part of the housing 2, and the lower outer circumference of the external threaded seat 1 is provided with external threads. The external threaded seat 1 is connected to the threaded hole on the vibrating screen, ensuring a stable connection during use and facilitating the replacement of the air breather. Teflon tape can be wrapped around the external threaded seat 1 to further achieve a sealing effect at the connection. The external threaded seat 1 and the housing 2 can be connected by interference fit and spot welding, ensuring both connection strength and sealing at the connection point.

[0024] The second splash guard 5 consists of two inverted truncated cone shells. An annular groove 12 is provided on the outer ring of the inner bottom surface of each shell, and several splash-proof through holes 11 are provided on the annular groove 12. The bottom surface of the second splash guard 5, corresponding to the oil splash holes of the vibrating screen, is planar and closed. Most of the lubricating oil splashed from the vibrating screen is reflected back by the bottom surface or conical surface of the second splash guard 5. A small amount of lubricating oil passes through the splash-proof through holes 11 and falls into the annular groove 12. The lubricating oil collected in the annular groove 12 flows back into the vibrating screen through the splash-proof through holes 11, effectively preventing lubricating oil leakage. The main function of the splash-proof through holes 11 is to ensure smooth gas passage and maintain the air pressure balance inside and outside the vibrating screen. The second splash guard 5 can be connected to the inner wall of the shell 2 by welding or other methods.

[0025] Below splash guard 2 5, splash guard 1 4 is installed. Splash guard 1 4 is inverted cone shape, and a vent hole 10 is provided at the center of the bottom of splash guard 1 4. The diameter of the vent hole 10 is smaller than the bottom diameter of the inverted cone shell 2. The splash guard 1 4 extends the path of lubricating oil splashing, which to a certain extent avoids a large amount of lubricating oil from the vibrating screen splashing into this device. On the other hand, splash guard 1 4 can block some of the splashed lubricating oil, allowing some of the splashed lubricating oil to flow back into the vibrating screen along the conical wall of splash guard 1 4. A small portion of the lubricating oil that splashes out of splash guard 1 4 through the vent hole 10 is blocked by the bottom surface of splash guard 2 5 and returns to the vibrating screen, effectively preventing the lubricating oil in the vibrating screen from overflowing and ensuring sufficient lubricating oil in the vibrating screen.

[0026] A vent plate 6 is added to the bottom of the filter element 7. The vent plate 6 is circular and is fixedly connected to the cap body 3. Several through holes are evenly distributed on the vent plate 6. The function of the through holes is to allow gas to pass through and maintain the pressure balance inside and outside the vibrating screen; the vent plate 6 can reliably fix the filter element 7.

[0027] Both the cap body 3 and the vent tube 9 have threaded holes at their upper center. The threaded holes of the cap body 3 and the vent tube 9 are connected by screws 8, which facilitates the assembly and disassembly of the cap body 3 and the vent tube 9.

[0028] During the operation of the vibrating screen, the temperature inside the screen continuously rises, and the air pressure inside the equipment continuously increases. The gas then passes through the vent holes 10 of the shell 2, the splash guard 4, the splash guard hole 11 of the second splash guard 5, the vent chamber and filter hole 13 of the vent pipe 9, and the filter element 7 to reach the outside of the equipment (e.g., Figure 3This device achieves the purpose of balancing the internal and external air pressure of the equipment. When the vibrating screen stops working, the temperature inside the vibrating screen decreases, and the internal air pressure decreases. The external gas first passes through the filter element 7 for filtration and purification, and then enters the vibrating screen through the ventilation chamber and filter hole 13 of the ventilation pipe 9, the splash-proof through hole 11 of the splash-proof sleeve 2 5, the ventilation hole 10 of the splash-proof sleeve 1 4, and the shell 2. This device stabilizes the internal and external air pressure balance of the vibrating screen while preventing external dust from entering the vibrating screen and contaminating the lubricating oil. When the vibrating screen is working, due to the large impact, the lubricating oil inside the vibrating screen will be splashed into the ventilator under the impact. Part of the lubricating oil is blocked and refracted back into the vibrating screen by the splash-proof sleeve 1 4, and the other part of the lubricating oil splashes out of the splash-proof sleeve 1 4 through the ventilation hole 10 and is blocked by the bottom surface of the splash-proof sleeve 2 5 and returns to the vibrating screen (e.g., Figure 4 This effectively prevents lubricating oil from overflowing from the vibrating screen and ensures sufficient lubricating oil inside. The housing 2 and the vent pipe 9 can be connected by interference fit and external spot welding. This connection method ensures the connection strength while guaranteeing the airtightness of the main body, preventing external air from entering the vibrating screen without passing through the filter element 7, and improving the dust isolation effect.

Claims

1. A ventilator for a vibrating screen, characterized in that: Includes a housing (2), inside which a splash guard (5) is installed, and the splash guard (5) is provided with a splash guard through hole (11). The upper part of the housing (2) is connected to the lower part of the vent pipe (9). A filter element (7) is provided around the upper part of the vent pipe (9). The filter element (7) is covered in the cap body (3). A venting chamber is provided in the middle of the vent pipe (9). The venting chamber wall corresponding to the filter element (7) is provided with a filter hole (13). The splash guard (5) is an inverted truncated cone housing sleeve. The outer ring of the inner bottom surface of the inverted truncated cone housing sleeve is provided with a ring. The annular groove (12) is provided with several anti-splash through holes (11); the anti-splash sleeve 2 (5) is provided with an anti-splash sleeve 1 (4) below it. The anti-splash sleeve 1 (4) is inverted cone shape. The bottom center of the anti-splash sleeve 1 (4) is provided with a vent hole (10), and the diameter of the vent hole (10) is smaller than the bottom diameter of the inverted cone shell sleeve; the filter element (7) is provided with a vent plate (6) at the bottom. The vent plate (6) is in the shape of a ring. The vent plate (6) is fixedly connected to the cap body (3). Several through holes are evenly distributed on the vent plate (6).

2. The air vent for a vibrating screen according to claim 1, characterized in that: The lower part of the housing (2) is equipped with an external thread seat (1), and the lower outer periphery of the external thread seat (1) is provided with an external thread.

3. The air vent for a vibrating screen according to claim 1, characterized in that: Both the cap (3) and the ventilator (9) have a threaded hole at the center of their upper ends, and the threaded holes of the cap (3) and the ventilator (9) are connected by screws (8).

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