Waste gas treatment device for machining

Abstract

The invention provides a waste gas treatment device for machining, and relates to the field of gas filtration, the waste gas treatment device comprises a tank body and an annular filter screen plate, the annular filter screen plate is connected to the inner top wall of the tank body, a gas inlet ring is arranged on the surface of the annular filter screen plate in an up-down moving manner, an annular cavity is formed in the inner wall of the gas inlet ring, the gas inlet ring is communicated with a pipeline, and the pipeline extends out of the tank body; the upper end of the tank body is connected with a motor, the motor is in transmission connection with the air inlet ring, the tank body is communicated with a guide pipe, the guide pipe is axially provided with a pressing mechanism in a sealed sliding mode, the guide pipe is communicated with an air inlet pipe, the tank body is communicated with the other end of the air inlet pipe, and the communicating portion of the guide pipe and the air inlet pipe is arranged at the lower end of the pressing mechanism. The touch switch is arranged at the upper end of the pressing mechanism, the touch switch is electrically connected with the motor, and the touch switch is controlled through the pressure change in the tank body, so that the motor is controlled to start, the air inlet ring is driven to move into the annular filter screen plate, the air inlet ring and the pipeline, and the annular filter screen plate is cleaned while filtering is performed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas filtration, in particular to a waste gas treatment device for machining. BACKGROUND

[0002] When machining work is carried out in a workshop, waste gas containing dust is generated, and in the prior art, a filtering device is usually used to filter and treat such waste gas. The existing filtering device is mainly composed of a tank body and an annular filter screen plate installed inside the tank body. When filtering operation is carried out, waste gas is injected into the tank body, and after being filtered by the annular filter screen plate, clean waste gas enters the inside of the annular filter screen plate and is then discharged from the annular filter screen plate. In order to prevent dust from blocking the annular filter screen plate, a timed backwashing air pressure device is arranged on the tank body. The filtering device stops running, and the annular filter screen plate is cleaned by using backwashing air pressure, so as to avoid dust from blocking the annular filter screen plate and ensure that waste gas can pass through smoothly.

[0003] However, the above filtering device has the following two significant problems: Firstly, the timed backwashing air pressure device cannot dynamically clean according to the actual blocking condition of the annular filter screen plate; Secondly, when backwashing operation is carried out, the filtering function in the tank body must be suspended, which undoubtedly reduces the overall filtering efficiency. In view of the above problems, we have developed a new waste gas treatment device for machining. SUMMARY

[0004] In view of the above problems, the present application provides a waste gas treatment device for machining. When the annular filter screen plate is blocked, the pressure in the tank body increases, gas enters the air inlet pipe and the conduit, the pressing mechanism rises, touches the touch switch, the control motor starts, drives the air inlet ring to move to the mesh hole of the annular filter screen plate, forms a passage of the annular filter screen plate inside, the air inlet ring and the pipeline, facilitates cleaning of the annular filter screen plate while filtering, and monitors the blocking condition of the annular filter screen plate through the change of the pressure in the tank body, controls the start and stop of the motor, and is more practical.

[0005] The mechanical machining waste gas treatment device provided by the application comprises a tank body, an annular filter screen plate, a gas guide pipe fixedly connected to the tank body, a gas distribution pipe communicated with the gas guide pipe, the tank body and the gas distribution pipe, a sealing surface provided on the annular filter screen plate, an air inlet ring movably arranged on the annular filter screen plate, the sealing surface of the annular filter screen plate and the air inlet ring being axially movably sealed and combined, an annular cavity provided on the inner wall of the air inlet ring, a pipeline communicated with the air inlet ring and extending out of the tank body, a motor connected to the upper end of the tank body, the motor being in transmission connection with the air inlet ring, a partition plate fixedly connected to the inside of the gas guide pipe, the partition plate being arranged at the lower end of the communication part of the gas distribution pipe and the gas guide pipe, and an air outlet pipe communicated with the gas guide pipe and arranged below the partition plate.

[0006] According to the further improved scheme of the application, a guide pipe is communicated with the tank body, a through hole two is arranged on the side wall of the guide pipe, a pressing mechanism is axially movably arranged on the guide pipe, the pressing mechanism comprises a pushing column, an extruding column and a spring, the pushing column is in piston connection with the guide pipe, a columnar groove is arranged on the upper end of the pushing column, the extruding column is in piston connection with the columnar groove, and the spring is arranged inside the columnar groove and below the extruding column.

[0007] According to the further improved scheme of the application, an air inlet pipe is communicated with the guide pipe, the other end of the air inlet pipe is communicated with the tank body, the part where the guide pipe and the air inlet pipe are communicated is arranged below the lower end surface of the pushing column, a piston plate is movably arranged in the air inlet pipe, a touch switch is arranged on the tank body and above the extruding column, the touch switch is in electrical connection with the motor, a negative pressure cylinder is connected to the air inlet ring, and the negative pressure cylinder is in piston connection with the guide pipe.

[0008] According to the further improved scheme of the application, a tension spring is arranged inside the guide pipe, one end of the tension spring is connected with the pressing mechanism, and the other end of the tension spring is connected with the guide pipe.

[0009] The mechanical machining waste gas treatment device provided by the application has the following advantages: When the annular filter screen plate is blocked, the pressure in the tank body increases, the gas enters the air inlet pipe and the guide pipe, the pressing mechanism is extruded and rises, the touch switch is touched, the motor is controlled to start, the air inlet ring is driven to move to the mesh hole of the annular filter screen plate, a passage is formed among the annular filter screen plate, the air inlet ring and the pipeline, the cleaning of the annular filter screen plate is facilitated while the filtering is performed, the blocking of the annular filter screen plate is monitored through the change of the pressure in the tank body, the start and stop of the motor are controlled, and the device is more practical. Through the formed backwashing passage, the need to stop the filtering to backwash the annular filter screen plate is avoided, and the efficiency is improved. The air inlet ring is movably arranged on the annular filter screen plate, the mesh holes of the annular filter screen plate can all form backwashing routes with the air inlet ring, the mesh holes of the annular filter screen plate can be backwashed and cleaned, and the cleaning effect is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 A structural diagram of a waste gas treatment device for machining provided by the present application; Figure 2 A structural diagram of a ring filter screen and an air inlet ring of a waste gas treatment device for machining provided by the present application; Figure 3 A structural diagram of a pipeline of a waste gas treatment device for machining provided by the present application; Figure 4 An internal structural diagram of a tank body of a waste gas treatment device for machining provided by the present application; Figure 5 A transmission structural diagram of a motor and an air inlet ring of a waste gas treatment device for machining provided by the present application; Figure 6 A cross-sectional view of a guide pipe, an air inlet pipe, and a pressing mechanism of a waste gas treatment device for machining provided by the present application; In the drawings: 1, tank body; 2, ring filter screen; 3, air inlet ring; 4, annular cavity; 5, pipeline; 6, motor; 7, guide pipe; 8, pressing mechanism; 9, air inlet pipe; 10, touch switch; 11, negative pressure cylinder; 12, sealing surface; 13, air guide pipe; 14, air distribution pipe; 15, tension spring; 16, pushing column; 17, extruding column; 18, spring; 19, cylindrical groove; 20, exhaust pipe one; 21, air ring; 22, corrugated expansion pipe; 23, exhaust pipe two; 24, reciprocating screw; 25, belt pulley; 26, belt; 27, pulley; 28, air outlet pipe; 29, piston plate. DETAILED DESCRIPTION

[0011] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings, in which a preferred embodiment of the present application is given; however, the present application can be realized in many different forms and is not limited to the embodiments described herein; similarly, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0012] According to Figures 1-6The mechanical machining exhaust treatment device shown comprises a tank body 1, an annular filter screen plate 2, a gas guide pipe 13 fixedly communicated with the middle part of the upper end face of the tank body 1, two groups of gas distribution pipes 14 fixedly communicated with the gas guide pipe 13, the tank body 1 being communicated with the other ends of the two groups of gas distribution pipes 14 respectively, a partition plate fixedly connected inside the gas guide pipe 13, the partition plate being arranged at the lower end of the communication part of the gas distribution pipe 14 and the gas guide pipe 13, a gas outlet pipe 28 communicated with the gas guide pipe 13 and arranged below the partition plate, the annular filter screen plate 2 being connected to the central part of the inner top wall of the tank body 1, the external exhaust gas entering the inside of the tank body 1 through the gas guide pipe 13 and the gas distribution pipe 14 and being filtered through the annular filter screen plate 2, the filtered gas entering the inside of the annular filter screen plate 2 and being discharged through the gas guide pipe 13 and the gas outlet pipe 28.

[0013] A one-way valve body is arranged inside the gas outlet pipe 28, in normal use, the gas pressure in the tank body 1 opens the one-way valve body, when the annular filter screen plate 2 is blocked, the one-way valve body blocks the gas outlet pipe 28.

[0014] A sealing surface 12 is arranged on the upper surface of the annular filter screen plate 2, an air inlet ring 3 is arranged on the surface of the annular filter screen plate 2 and moves up and down, the air inlet ring 3 is axially movably sealed and combined with the sealing surface 12 of the annular filter screen plate 2, in the initial state, when the air inlet ring 3 is combined with the sealing surface 12 of the annular filter screen plate 2, the gas in the tank body 1 and the annular filter screen plate 2 will not enter the inside of the air inlet ring 3.

[0015] An annular cavity 4 is arranged on the inner wall of the air inlet ring 3, a pipeline 5 communicated with the annular cavity 4 is arranged on the air inlet ring 3, the pipeline 5 comprises two groups, the other end of the pipeline 5 extends out of the tank body 1, the pipeline 5 comprises an exhaust pipe one 20, an air ring 21, a corrugated expansion pipe 22 and an exhaust pipe two 23, the exhaust pipe one 20 is fixedly connected with the air inlet ring 3 and communicated with the annular cavity 4, the other end of the exhaust pipe one 20 is fixedly communicated with the side end surface of the air ring 21, the lower end part of the air ring 21 is a blocking structure, the corrugated expansion pipe 22 is fixedly communicated with the upper end part of the air ring 21, the corrugated expansion pipe 22 facilitates the up and down movement of the air inlet ring 3, the exhaust pipe two 23 is fixedly communicated with the end of the corrugated expansion pipe 22 away from the air ring 21, the end of the exhaust pipe two 23 away from the corrugated expansion pipe 22 is fixedly extended out of the tank body 1, a dust collection bag is connected to the end of the exhaust pipe two 23 extended out of the tank body 1, the dust collection bag facilitates the filtration of the exhaust gas, when the air inlet ring 3 moves downward to the mesh hole of the annular filter screen plate 2, the gas in the inside of the annular filter screen plate 2 enters the annular cavity 4 through the mesh hole of the annular filter screen plate 2 and is filtered through the dust collection bag via the exhaust pipe one 20, the air ring 21, the corrugated expansion pipe 22 and the exhaust pipe two 23.

[0016] The upper end of the tank body 1 is connected to a motor 6. Two sets of reciprocating screws 24 are rotated inside the tank body 1. The upper ends of the two sets of reciprocating screws 24 are respectively movably sealed and extend out of the upper end surface of the tank body 1. One of the reciprocating screws 24 is fixedly connected to the output end of the motor 6. Pulleys 25 are fixedly sleeved on the two reciprocating screws 24. Belts 26 are wound around the two pulleys 25. A pulley 27 is rotatably sleeved on the air guide pipe 13. The inner surface of the belt 26 is pressed against the outer surface of the pulley 27. The reciprocating screw 24 is threadedly connected to the intake ring 3. The motor 6 is started. The reciprocating screw 24 is driven to rotate, and the rotating reciprocating screw 24 drives the pulley 25 on it to rotate, and drives another pulley 25 to rotate through the belt 26, and drives the corresponding reciprocating screw 24 to rotate. The two rotating reciprocating screws 24 drive the intake ring 3 threadedly connected to the reciprocating screw 24 to move up and down, so that the intake ring 3 is dynamically aligned with the mesh holes of the annular filter plate 2 and the sealing surface 12. The intake ring 3 is dynamically aligned with the mesh holes of the annular filter plate 2 to ensure the cleaning effect of the mesh holes at various locations on the annular filter plate 2.

[0017] The tank body 1 is connected to a conduit 7, which is located on the outer end side of the annular filter plate 2. A pressing mechanism 8 is axially sealed and slidably provided on the conduit 7. The pressing mechanism 8 includes a push column 16, an extrusion column 17, and a spring 18. The push column 16 is piston-connected to the conduit 7. A cylindrical groove 19 is provided on the upper end of the push column 16. The extrusion column 17 is piston-connected in the cylindrical groove 19. A soft pad is connected to the upper end surface of the extrusion column 17. A touch switch 10 is provided on the tank body 1. The touch switch 10 is electrically connected to the motor 6. The touch switch 10 is provided above the extrusion column 17. The spring 18 is provided inside the cylindrical groove 19 and below the extrusion column 17. The touch switch 10 is pressed by the extrusion column 17 to start and close.

[0018] The conduit 7 is connected to the air intake pipe 9, and the tank body 1 is connected to the other end of the air intake pipe 9. The part where the conduit 7 is connected to the air intake pipe 9 is located below the lower end surface of the push column 16. A piston plate 29 moves up and down in a piston-like manner inside the air intake pipe 9. The conduit 7 is located on the surface outside the tank body 1 and is connected to a pressure relief valve. The pressure relief valve is located below the push column 16. When the air pressure inside the conduit 7 is too high, the pressure is relieved. A negative pressure cylinder 11 is connected to the intake ring 3. The negative pressure cylinder 11 is connected to the piston of the conduit 7. A tension spring 15 is provided inside the conduit 7. One end of the tension spring 15 is connected to the pressing mechanism 8, and the other end is connected to the conduit 7. After the gas inside the air intake pipe 9 enters the conduit 7 or the gas inside the conduit 7 is squeezed and raised by the negative pressure cylinder 11, the tension spring 15 is stretched, and after the gas is exhausted through the pressure relief valve in the conduit 7, the push column 16 is reset by the tension spring 15. A one-way valve is provided in the conduit 7, and the one-way valve is provided at the lower end of the tension spring 15.

[0019] Principle: In the initial state, the air inlet ring 3 is located at the sealing surface 12 of the annular filter plate 2; In use, the exhaust gas is delivered to the inside of the tank body 1 through the gas guide pipe 13 and the gas distribution pipe 14, filtered through the annular filter screen plate 2, and then the clean air enters the inside of the annular filter screen plate 2 and is finally discharged through the air outlet pipe 28, thus completing the filtering treatment of the exhaust gas. In the filtering process of the exhaust gas, when the dust in the exhaust gas blocks the mesh of the annular filter screen plate 2, the flow of the exhaust gas in the tank body 1 slows down, the pressure in the tank body 1 increases with the injection of the exhaust gas, the piston plate 29 is moved upward to squeeze the gas in the gas inlet pipe 9, the push column 16, the spring 18 and the squeeze column 17 are moved upward, the soft pad at the upper end of the squeeze column 17 touches the touch switch 10, thus the touch switch 10 is opened, the touch switch 10 controls the motor 6 to start, drives the reciprocating screw 24 to rotate, and drives the gas inlet ring 3 to move up and down, when the gas inlet ring 3 moves to the mesh of the annular filter screen plate 2, the gas in the inside of the annular filter screen plate 2 passes through the mesh of the annular filter screen plate 2, the gas inlet ring 3, the first exhaust pipe 20, the gas ring 21, the corrugated expansion pipe 22 and the second exhaust pipe 23 in sequence and is discharged into the cloth bag for collection, thus avoiding the need for stopping the device and performing backwashing operation in the prior art, in the cleaning process of the annular filter screen plate 2, the flow rate of the gas increases and the pressure in the inside of the tank body 1 decreases, the piston plate 29 is reset under the gas in the gas inlet pipe 9, and the push column and the squeeze column 17 are reset.

[0020] When the gas inlet ring 3 moves upward, the negative pressure cylinder 11 moves upward, the negative pressure cylinder 11 and the guide pipe 7 are connected in the negative pressure connection state from the separated state, the negative pressure cylinder 11 squeezes the gas in the guide pipe 7, the gas in the guide pipe 7 pushes the push column 16, the spring 18 and the squeeze column 17 to move upward, the soft pad at the upper end of the squeeze column 17 touches the touch switch 10, thus the touch switch 10 is closed, the touch switch 10 controls the motor 6 to stop running, and the cleaning process of the annular filter screen plate 2 is completed, at this time, the inner end of the gas inlet ring 3 is attached to the sealing surface 12 of the annular filter screen plate 2, the air pressure in the guide pipe 7 is too large at this time, and is released through the pressure relief valve, after the pressure relief, the push column 16 and the squeeze column 17 are reset under the pulling force of the tension spring 15, and the soft pad at the upper end of the squeeze column 17 is no longer in contact with the touch switch 10.

[0021] Although the present application has been disclosed with reference to the preferred embodiments, it is not intended to limit the present application, and any person skilled in the art can make various modifications and modifications without departing from the spirit and scope of the present application, therefore the protection scope of the present application should be defined by the claims.

Claims

1. A waste gas treatment device for machining, comprising a tank body (1), an annular filter screen plate (2), wherein the annular filter screen plate (2) is connected to the inner top wall of the tank body (1), and is characterized in that: An air intake ring (3) is provided on the surface of the annular filter screen plate (2) so as to move up and down. An annular cavity (4) is provided on the inner wall of the air intake ring (3). A pipe (5) is connected to the air intake ring (3). The pipe (5) extends out of the tank body (1). A motor (6) is connected to the upper end of the tank body (1). The motor (6) is in transmission connection with the air intake ring (3). The tank body (1) is connected to a conduit (7), an axial sealing sliding pressing mechanism (8) is provided on the conduit (7), an air inlet pipe (9) is connected to the conduit (7), the tank body (1) is connected to the other end of the air inlet pipe (9), a portion where the conduit (7) is connected to the air inlet pipe (9) is located at the lower end of the pressing mechanism (8), a touch switch (10) is provided on the tank body (1), the touch switch (10) is located at the upper end of the pressing mechanism (8), and the touch switch (10) is electrically connected to the motor (6).

2. The exhaust gas treatment device for machining according to claim 1, characterized in that: The air inlet ring (3) is connected to a negative pressure cylinder (11), and the negative pressure cylinder (11) is connected to the piston of the conduit (7).

3. The exhaust gas treatment device for machining according to claim 1, characterized in that: A sealing surface (12) is provided on the upper end of the surface of the annular filter screen plate (2), and the sealing surface (12) of the annular filter screen plate (2) is axially movable and sealed in contact with the air inlet ring (3).

4. The exhaust gas treatment device for machining according to claim 1, characterized in that: A tension spring (15) is provided inside the conduit (7), one end of the tension spring (15) is connected to the pressing mechanism (8), and the other end is connected to the conduit (7).

5. The exhaust gas treatment device for machining according to claim 1, characterized in that: The pressing mechanism (8) includes a pushing column (16), an extrusion column (17), and a spring (18). The pushing column (16) is connected to the upper end of the catheter (7) in a piston-like manner. The upper end of the pushing column (16) is provided with a cylindrical groove (19). The extrusion column (17) is connected to the cylindrical groove (19) in a piston-like manner. The spring (18) is arranged inside the cylindrical groove (19) and below the extrusion column (17). The tension spring (18) is connected to the pushing column (16) near the end of the pushing column (16).

6. The exhaust gas treatment device for machining according to claim 1, characterized in that: The tank body (1) is connected to an air guide pipe (13), the air guide pipe (13) is connected to an air distribution pipe (14), and the tank body (1) is connected to the air distribution pipe (14).

7. The waste gas treatment device for machining according to claim 1, characterized in that: A piston plate (30) is provided inside the air intake pipe (9) so as to move up and down in a piston-like manner.

8. The waste gas treatment device for machining according to claim 6, characterized in that: A partition is fixedly connected to the inside of the air guide pipe (13), and the partition is arranged at the lower end of the portion where the air distribution pipe (14) and the air guide pipe (13) are connected. An air outlet pipe (28) is connected to the air guide pipe (13), and the air outlet pipe (28) is arranged below the partition.

Images