Self-cleaning air draft system of polishing workbench

Abstract

The utility model discloses a polishing workbench self-cleaning air draft system which comprises a fan and a filter element, the fan and the filter element are both arranged in a workbench main body, the fan and the filter element are communicated through a vent pipe, the polishing workbench is further provided with a piston opening and closing device, the piston opening and closing device is arranged at the front end of the filter element, and the piston opening and closing device is connected with the filter element. A piston opening and closing device is arranged at the front end of the filter element, the piston opening and closing device comprises a movable piston, and opening and closing of the movable piston control the ventilation pipe to form an air exhaust passage and a self-cleaning passage respectively. And dust and chippings on the surface of the filter element can be cleaned.

Description

Technical Field

[0001] The present application relates to the technical field of polishing machine workbenches, and in particular to a self-cleaning exhaust system for a polishing workbench. Background Art

[0002] After the valve is processed, the surface of the valve is relatively rough due to the problem of processing accuracy. In order to make the appearance of the valve smoother and flatter and avoid the burrs generated in the production process that affect the coordination between the valve and other parts, the staff will use a polishing machine to grind and polish the surface of the valve after production to make the surface of the part smoother. The operating platform for polishing is the polishing workbench, which usually meets the functions of object bearing, power integration and dust collection.

[0003] In the existing technology, during the polishing and grinding process, debris and dust fly everywhere, which not only pollutes the environment, but also may cause damage to the human respiratory system. Therefore, in order to prevent the occurrence of the above problems, the workbench is usually equipped with an exhaust system to actively collect the dust and debris generated during the operation of the workbench, thereby preventing environmental pollution and harm to the human body. However, during long-term use, the surface of the filter element in the exhaust system is often covered with dust and debris, causing blockage of the air duct, so there is room for improvement. Summary of the Invention

[0004] To address the above-mentioned issues, the present application proposes a self-cleaning exhaust system for a polishing workbench. A piston opening and closing device that can be opened and closed is provided at the front end of the filter element. The air flow direction is changed to allow the filter element to ventilate in the reverse direction, thereby cleaning the dust and debris on the surface of the filter element. The self-cleaning exhaust system for a polishing workbench is specifically implemented through the following technical solutions:

[0005] A self-cleaning exhaust system for a polishing workbench includes: a fan and a filter element, wherein the fan and the filter element are both arranged inside the workbench body, and the fan and the filter element are connected through a ventilation pipe. A piston opening and closing device is also provided, and the piston opening and closing device is arranged at the front end of the filter element. The piston opening and closing device includes a movable piston, and the opening and closing of the movable piston controls the ventilation pipe to form an exhaust passage and a self-cleaning passage respectively.

[0006] It is further provided that the piston opening and closing device also includes a piston base, connecting ribs, a shaft tube and a sleeve. The piston base is installed on the filter element, and an air port is provided on the piston base. The air port is adapted to the movable piston. The inner end of the shaft tube is connected to the ventilation pipe, and the outer end of the shaft tube is connected to the piston base through the connecting ribs, and the movable piston and the shaft sleeve can be slidably sleeved on the outer periphery of the shaft tube in the extension direction of the shaft tube in turn. A pressure chamber is formed between the shaft sleeve and the movable piston, and an air hole is provided on the shaft tube corresponding to the position of the pressure chamber. Through this setting, the piston movement of the movable piston is manifested, and the opening and closing of the air port is controlled.

[0007] It is further configured that the piston opening and closing device also includes a return spring, which is sleeved on the outer circumference of the shaft tube, and the return spring is a compression spring, one end of which is against the movable piston, and the other end is against the connecting rib. Through this configuration, the movable piston is in a normally open state under the action of the return spring.

[0008] It is further provided that a locking nut is provided at the top end of the sleeve. This arrangement prevents the movable piston from falling out, and the overall structure is more stable.

[0009] It is further arranged that when the fan rotates forward to inhale air, air from the outside passes through the filter element, the outer end of the shaft tube, the inner end of the shaft tube and the ventilation pipe in sequence to reach the fan, and negative pressure is formed in the pressure chamber. Under the action of the negative pressure in the pressure chamber, the movable piston keeps the air port open to form the exhaust passage. Through this arrangement, basic dust and debris collection and filter element filtering functions are achieved.

[0010] It is further arranged that when the fan is reversed to pump air, the air passes from the fan through the ventilation pipe, the inner end of the shaft tube, the outer end of the shaft tube and the filter element in sequence to reach the outside world, and the pressure chamber forms high pressure. Under the action of the high pressure, the movable piston closes the air port to form the self-cleaning passage. Through this arrangement, the function of reverse cleaning the filter element is realized.

[0011] It is further arranged that the filter element and the piston opening and closing device are arranged in multiple groups, and the number of the filter element and the piston opening and closing device is the same, and the piston opening and closing devices are connected through the ventilation pipe. Through this arrangement, multiple groups of the piston opening and closing devices and multiple groups of filter elements increase the overall work efficiency.

[0012] In summary, the self-cleaning exhaust system of the polishing workbench is provided with a piston opening and closing device that can be opened and closed at the front end of the filter element, and by changing the direction of air flow, the filter element is ventilated in the reverse direction, thereby cleaning the dust and debris on the surface of the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0014] Figure 1 A schematic diagram of the structure of a self-cleaning exhaust system for a polishing table provided in an embodiment of the present application;

[0015] Figure 2 The self-cleaning exhaust system for the polishing table provided in the embodiment of the present application Figure 1 Enlarged view of part A in the middle;

[0016] Figure 3 An exploded view of the self-cleaning exhaust system for a polishing table provided in an embodiment of the present application;

[0017] Figure 4 A cross-sectional view of the self-cleaning exhaust system for a polishing table provided in an embodiment of the present application.

[0018] Among them, the reference numerals in the figures are:

[0019] 1. Fan; 2. Filter element; 3. Ventilation pipe; 4. Piston opening and closing device; 5. Movable piston; 6. Exhaust passage; 7. Self-cleaning passage; 8. Piston base; 9. Connecting rib; 10. Shaft tube; 11. Shaft sleeve; 12. Air port; 13. Air hole; 14. Return spring; 15. Locking nut. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0021] The appearance of the above words in various places in the specification does not necessarily refer to the same embodiment, nor does it mean independent or alternative embodiments that are mutually exclusive with other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0022] The present application is now further described with reference to the accompanying drawings and specific embodiments:

[0023] Please also refer to Figures 1 to 4A self-cleaning exhaust system for a polishing workbench includes: a fan 1 and a filter element 2, both of which are arranged inside the workbench body, and the fan 1 and the filter element 2 are connected through a ventilation pipe 3, and a piston opening and closing device 4 is also provided. The piston opening and closing device 4 is arranged at the front end of the filter element 2, and the piston opening and closing device 4 includes a movable piston 5. The opening and closing of the movable piston 5 controls the ventilation pipe 3 to form an exhaust passage 6 and a self-cleaning passage 7 respectively.

[0024] See also Figures 1 to 4In this embodiment, the piston opening and closing device 4 also includes a piston base 8, a connecting rib 9, a shaft tube 10 and a sleeve 11. The piston base 8 is installed on the filter element 2. An air port 12 is provided on the piston base 8. The air port 12 is adapted to the movable piston 5. The inner end of the shaft tube 10 is communicated with the ventilation pipe 3. The outer end of the shaft tube 10 is connected to the piston base 8 through the connecting rib 9, and the movable piston 5 and the sleeve 11 can be slidably sleeved on the outer periphery of the shaft tube 10 in the extending direction of the shaft tube 10 in turn. A pressure chamber is formed between the sleeve 11 and the movable piston 5. The shaft tube 10 corresponds to the position of the pressure chamber. An air hole 13 is provided, and a sealing device is provided between the piston base 8 and the movable piston 5 to ensure that when the movable piston 5 is closed, the air port 12 will not leak, so that the gas can only pass through the filter element 2 from the inside to the outside, and realize the function of blowing dust and debris away from the filter element 2; the piston opening and closing device 4 also includes a reset spring 14, which is sleeved on the outer periphery of the shaft tube 10, and the reset spring 14 is a compression spring, one end of which is against the movable piston 5 and the other end is against the connecting rib 9; the top of the sleeve 11 is provided with a locking nut 15, so that when the fan 1 is not working, the reset spring 14 is pressed against the movable piston 5 and the other end is pressed against the connecting rib 9; the top of the sleeve 11 is provided with a locking nut 15, so that when the fan 1 is not working, the reset spring 14 is pressed against the movable piston 5 and the connecting rib 9 Under the action of the spring 14, it maintains a normally open state to ensure the effectiveness of the workbench's suction function; when the fan 1 rotates forward to inhale, air from the outside passes through the filter element 2, the outer end of the shaft tube 10, the inner end of the shaft tube 10 and the ventilation pipe 3 in sequence to reach the fan 1, and a negative pressure is formed in the pressure chamber. Under the action of the negative pressure in the pressure chamber, the movable piston 5 keeps the air port 12 open to form the exhaust passage 6; when the fan 1 is reversed to inflate, air from the fan 1 passes through the ventilation pipe 3, the inner end of the shaft tube 10, the outer end of the shaft tube 10 and the filter element 2 in sequence to reach the outside, and the pressure chamber forms a high pressure. Under the action of the high pressure, the movable piston 5 makes the air port 1 open. 2 is closed to form the self-cleaning passage 7. With this arrangement, the air flow in the exhaust passage 6 and the self-cleaning passage 7 is approximately in opposite directions, and their power sources are both from the fan 1. When the pressure chamber is under high pressure, the movable piston 5 is pushed to close. When the pressure chamber is under negative pressure, the return spring 14 acts on the movable piston 5 to maintain a normally open state. When the fan 1 is reversed to pump air, the air passes from the fan 1 in sequence through the ventilation pipe 3, the inner end of the shaft tube 10, the outer end of the shaft tube 10 and the filter element 2 to the outside world. The pressure chamber forms a high pressure. Under the action of the high pressure, the movable piston 5 closes the air port 12 to form the self-cleaning passage 7.

[0025] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A self-cleaning exhaust system for a polishing workbench, comprising: A fan (1) and a filter element (2), wherein the fan (1) and the filter element (2) are both arranged inside a workbench body, and the fan (1) and the filter element (2) are connected via a ventilation pipe (3), characterized in that: a piston opening and closing device (4) is also provided, wherein the piston opening and closing device (4) is provided at the front end of the filter element (2), and the piston opening and closing device (4) includes a movable piston (5), and the opening and closing of the movable piston (5) controls the ventilation pipe (3) to form an exhaust passage (6) and a self-cleaning passage (7), respectively; the piston opening and closing device (4) also includes a piston base (8), a connecting rib (9), a shaft tube (10) and a shaft sleeve (11), The piston base (8) is mounted on the filter element (2), and an air port (12) is provided on the piston base (8), and the air port (12) is adapted to the movable piston (5). The inner end of the shaft tube (10) is communicated with the ventilation pipe (3), and the outer end of the shaft tube (10) is connected to the piston base (8) via a connecting rib (9), and the movable piston (5) and the shaft sleeve (11) can be slidably sleeved on the outer periphery of the shaft tube (10) in the extension direction of the shaft tube (10) in turn, and a pressure chamber is formed between the shaft sleeve (11) and the movable piston (5), and an air hole (13) is provided on the shaft tube (10) corresponding to the position of the pressure chamber.

2. A self-cleaning exhaust system for a polishing table according to claim 1, characterized in that The piston opening and closing device (4) further includes a return spring (14), which is sleeved on the outer periphery of the shaft tube (10), and is a compression spring, one end of which is against the movable piston (5) and the other end of which is against the connecting rib (9).

3. A self-cleaning exhaust system for a polishing table according to claim 2, characterized in that A locking nut (15) is provided at the top end of the shaft sleeve (11).

4. A self-cleaning exhaust system for a polishing table according to claim 2, characterized in that When the fan (1) rotates forward to inhale, air from the outside passes through the filter element (2), the outer end of the shaft tube (10), the inner end of the shaft tube (10) and the ventilation pipe (3) in sequence to reach the fan (1), and negative pressure is formed in the pressure chamber. Under the action of the negative pressure in the pressure chamber, the movable piston (5) keeps the air port (12) open, forming the air extraction passage (6).

5. A self-cleaning exhaust system for a polishing table according to claim 2, characterized in that When the fan (1) is reversed to pump air, air passes from the fan (1) through the ventilation pipe (3), the inner end of the shaft tube (10), the outer end of the shaft tube (10) and the filter element (2) in sequence to reach the outside, and the pressure chamber forms a high pressure. Under the action of the high pressure, the movable piston (5) closes the air port (12) to form the self-cleaning passage (7).

6. A self-cleaning exhaust system for a polishing table according to claim 1, characterized in that : The filter element (2) and the piston opening and closing device are arranged in multiple groups, and the number of the filter element (2) and the piston opening and closing device is the same, and the piston opening and closing devices (4) are connected through the ventilation pipe (3).

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