CN109366362B

CN109366362B - Welding fume purification device convenient to circulate and replace

Info

Publication number: CN109366362B
Application number: CN201811188755.3A
Authority: CN
Inventors: 齐宽宽
Original assignee: Fuyang Angu Boiler Pressure Vessel Manufacture Co ltd
Current assignee: FUYANG ANGU BOILER PRESSURE VESSEL MANUFACTURE Co.,Ltd.
Priority date: 2018-10-12
Filing date: 2018-10-12
Publication date: 2020-12-08
Anticipated expiration: 2038-10-12
Also published as: CN109366362A

Abstract

The invention relates to a welding fume purification device convenient for circulation and replacement, which comprises a base, an air suction cover, an air suction arm, a purification pipe, a drain pipe, an exhaust pipe, a controller, a replacement mechanism and a dredging mechanism, wherein an air guide component, a support frame, a pressurizing mechanism and a dust filter screen are arranged in the purification pipe, the dredging mechanism comprises a water tank, a water injection pipe, a water pump and a water outlet pipe, a pressing mechanism comprises a pressurizing component, a pressurizing plate and two ventilating components, the replacement mechanism comprises a replacement chamber, a sealing block, a sealing cover, a handle, a moving component and a push plate, the welding fume purification device convenient for circulation and replacement can operate by matching the dredging mechanism and the pressurizing mechanism to downwards extrude water flow so as to extrude metal particles on the dust filter screen and ensure air circulation, moreover, the replacement mechanism can replace an active carbon filter screen absorbing saturation in the purification pipe in time to ensure the continuous purification capability of air of, the practicability of the equipment is improved.

Description

Welding fume purification device convenient to circulate and replace

Technical Field

The invention relates to the field of environment-friendly equipment, in particular to a welding fume purification device convenient to circulate and replace.

Background

The welding fume purifier is industrial environment protecting equipment, is specially designed for treating fine metal particles harmful to human body and suspended in air during welding, cutting and polishing, is suitable for single and double stations, has high purifying efficiency, is light and flexible, is provided with a flexible air suction arm, is flexible to move in different work places, is convenient to operate, and plays the roles of protecting environment and protecting health of workers.

When welding the cigarette clarifier and using, mainly through fan gravitation, will weld inside the cigarette suction means, keep apart the metal coarse dust particle through the filter core, after the harmful gas in the air is absorbed through activated carbon filter, discharge clean harmless air, after using for a long time, various particulate matters are piled up easily to the mesh department of filter core, lead to the circulation of air not smooth, moreover, when adopting activated carbon filter to purify, activated carbon will reach the saturated condition after using a period of time, equipment continues the operation this moment, make activated carbon adsorption's harmful gas volatilize easily, cause the secondary pollution of air, influence workman's breathing health, and the workman also can forget to change the activated carbon filter screen because of the negligence sometimes, lead to equipment unable purpose of purifying to the air this moment that reaches, the current practicality of welding cigarette purifier has been reduced.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: in order to overcome the defects of the prior art, the welding fume purification device convenient to circulate and replace is provided.

The technical scheme adopted by the invention for solving the technical problems is as follows: a welding fume purification device convenient to circulate and replace comprises a base, an air suction cover, an air suction arm, a purification pipe, a drain pipe, an exhaust pipe, a controller, a replacement mechanism and a dredging mechanism, wherein the purification pipe and the controller are fixed above the base;

the dredging mechanism comprises a water tank, a water injection pipe, a water pump and a water outlet pipe, wherein the water tank is fixed on the base, the water pump and the water injection pipe are both fixed above the water tank, the water injection pipe and the water pump are both communicated with the water tank, the water pump is communicated with the purification pipe through the water outlet pipe, a second valve is arranged in the water outlet pipe, the water pump and the second valve are both electrically connected with the PLC, and one end of the water outlet pipe, which is far away from the water pump, is positioned above the dust filter screen;

the pressurizing mechanism comprises a pressurizing assembly, a pressurizing plate and two ventilating assemblies, the pressurizing assembly is positioned above the pressurizing plate, the pressurizing assembly is in transmission connection with the pressurizing plate, the periphery of the pressurizing plate is in sealing connection with the inner wall of the purifying pipe, and the two ventilating assemblies are respectively positioned on two sides above the pressurizing plate;

the replacing mechanism comprises a replacing chamber, a sealing block, a sealing cover, a handle, a moving assembly and a push plate, the replacing chamber is fixed on the purifying tube, the replacing chamber is positioned above the supporting frame, the sealing cover is positioned above the replacing chamber, a plurality of activated carbon filter screens are uniformly arranged in the replacing chamber from top to bottom, the handle and the sealing block are respectively fixed above and below the sealing cover, two sides of the bottom of the replacing chamber are provided with first openings, the inner walls of the two sides in the purifying tube are provided with second openings, the second openings are positioned above the supporting frame, the first openings are communicated with the second openings, iron plates and magnets are arranged in the second openings, the magnets are fixed at the bottoms of the second openings, the top ends of the iron plates are hinged with the tops of the second openings, the moving assembly is positioned below the replacing chamber, and is in transmission connection with one end of the push plate, the other end of the push plate is positioned in the first opening at one end, far away from the purifying pipe, of the two first openings.

Preferably, in order to inhale the outside air and purify the back and discharge in the purge tube, the air guide subassembly includes first motor, pivot and two flabellums, first motor is fixed in the purge tube, first motor is connected with the PLC electricity, and two flabellums are located the both sides of pivot respectively, first motor is connected with the flabellum transmission through the pivot.

Preferably, in order to detect the quality of the air discharged by the exhaust pipe, an air quality sensor is arranged in the exhaust pipe, and the air quality sensor is electrically connected with the PLC.

Preferably, in order to fix the height position of the activated carbon filter screen, the inner walls of the two sides of the purifying pipe are respectively provided with a limiting plate, and the limiting plates are positioned above the second opening.

As preferred, in order to facilitate the suggestion people in time add the active carbon filter screen, the below of sealed piece is equipped with distance sensor, be equipped with the speaker on the purge tube, distance sensor and speaker all are connected with the PLC electricity.

Preferably, in order to drive the push plate to move, the moving assembly comprises an air pump, an air cylinder, a piston and a connecting rod, the air cylinder is fixed on the purifying pipe, the air pump is electrically connected with the PLC, the air pump is communicated with the air cylinder, one end of the piston is arranged in the air cylinder, and the other end of the piston is fixedly connected with the push plate through the connecting rod.

Preferably, in order to realize reciprocating of pressure plate, pressure mechanism includes second motor, second connecting rod, third connecting rod, fourth connecting rod and solid fixed ring, the second motor is all fixed in the purge tube with solid fixed ring, the second motor is connected with the PLC electricity, the second motor is connected with the second connecting rod transmission, the second connecting rod passes through the third connecting rod and is connected with the top transmission of fourth connecting rod, the bottom and the pressure plate fixed connection of fourth connecting rod, gu fixed ring cover establishes on the fourth connecting rod.

As preferred, close for the circulation of the air of the both sides of the convenience control increased pressure board, the subassembly of ventilating includes through-hole, third motor, lead screw, sleeve pipe, the piece of ventilating, spacing ring and two supports, the through-hole sets up on the increased pressure board, and two supports are located the both sides of third motor respectively, the third motor passes through support and increased pressure board fixed connection, the third motor is connected with the top transmission of lead screw, the third motor is connected with the PLC electricity, the cover pipe box is established in the bottom of lead screw, the sleeve pipe is equipped with the screw thread that matches with the lead screw with the junction of lead screw, the spacing ring is fixed between two supports, the spacing ring box is established on the sleeve pipe, the piece of ventilating is located the top of through-hole, the piece of ventilating is fixed in the sheathed tube below.

Preferably, in order to prevent the activated carbon filter screen from falling, a backing plate is arranged on one side of the purifying pipe, which is far away from the replacing chamber, and the backing plate is positioned below the second opening.

Preferably, a flow meter is provided in the purge pipe to detect whether air flows, and the flow meter is electrically connected to the PLC.

The welding fume purification device convenient to circulate and replace has the advantages that the dredging mechanism and the pressurizing mechanism are matched to operate, water flow is downwards extruded, metal particles on the dust filter screen are extruded, and air circulation is guaranteed.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic structural view of a welding fume purification device of the present invention for easy circulation and replacement;

FIG. 2 is a schematic structural view of a replacement mechanism of the welding fume purification apparatus of the present invention for easy circulation and replacement;

FIG. 3 is a schematic structural view of a pressurizing mechanism of the welding fume purification apparatus of the present invention for easy circulation and replacement;

FIG. 4 is a schematic structural view of the gas directing assembly of the welding fume cleaning apparatus of the present invention for easy circulation and replacement;

in the figure: 1. the air purifier comprises a base, 2 parts of an air suction cover, 3 parts of an air suction arm, 4 parts of a purification pipe, 5 parts of a drain pipe, 6 parts of an exhaust pipe, 7 parts of a controller, 8 parts of a support frame, 9 parts of a dust filter screen, 10 parts of a universal wheel, 11 parts of a water tank, 12 parts of a water injection pipe, 13 parts of a water pump, 14 parts of a water outlet pipe, 15 parts of a pressure plate, 16 parts of a replacement chamber, 17 parts of a sealing block, 18 parts of a sealing cover, 19 parts of a handle, 20 parts of a push plate, 21 parts of an iron plate, 22 parts of a magnet, 23 parts of a first motor, 24 parts of a rotating shaft, 25 parts of a fan blade, 26 parts of an air quality sensor, 27 parts of a distance sensor, 28 parts of an air pump, 29 parts of an air cylinder, 30 parts of a piston, 31 parts of a connecting rod, 32 parts of a second motor, 33 parts of a second connecting rod, 34 parts of a third connecting rod, 35 parts of a fourth connecting rod, 36 parts of a fixing, 45. and 46, a limiting plate.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

As shown in figure 1, the welding fume purification device convenient for circulation and replacement comprises a base 1, a suction hood 2, a suction arm 3, a purification pipe 4, a drain pipe 5, an exhaust pipe 6, a controller 7, a replacement mechanism and a dredging mechanism, wherein the purification pipe 4 and the controller 7 are both fixed above the base 1, a PLC is arranged in the controller 7, the drain pipe 5 is fixed at the bottom end of the purification pipe 4, a first valve is arranged in the drain pipe 5, the suction hood 2 is communicated with one side of the bottom end of the purification pipe 4 through the suction arm 3, the dredging mechanism and the replacement mechanism are both positioned at the other side of the purification pipe 4, the dredging mechanism is positioned below the replacement mechanism, an air guide assembly, a support frame 8, a pressurizing mechanism and a dust filtering net 9 are sequentially arranged in the purification pipe 4 from top to bottom, the support frame 8 and the dust filtering net 9 are both fixed in the purification pipe 4, the first valve is electrically connected with the PLC, universal wheels 10 are arranged below four corners of the base 1;

in the welding fume purification device, a base 1 is supported by a universal wheel 10, the movement of the device is convenient, the device can be operated by a controller 7, an air guide component in a purification tube 4 is started, the air in the purification tube 4 is discharged through an exhaust pipe 6, the pressure in the purification tube 4 is reduced, the external air enters the purification tube 4 through an air suction cover 2 and an air suction arm 3, the external air flows upwards in the purification tube 4, fine metal particles in the external air are filtered by a dust filter 9, the air continues to flow upwards, the clean and harmless air is discharged through the exhaust pipe 6 after the harmful air is adsorbed by an activated carbon filter screen supported by a support frame 8, in order to avoid the blockage of the dust filter screen 9, the dust filter screen 9 is dredged through the matching operation of a dredging mechanism and a pressurizing mechanism, the air circulation is ensured to be smooth, and the activated carbon filter screen on the support frame 8 can be replaced by a replacing mechanism, the continuous purification capacity of the equipment is ensured, so that the practicability of the equipment is improved.

As shown in fig. 1 and 3, the dredging mechanism includes a water tank 11, a water injection pipe 12, a water pump 13 and a water outlet pipe 14, the water tank 11 is fixed on the base 1, the water pump 13 and the water injection pipe 12 are both fixed above the water tank 11, the water injection pipe 12 and the water pump 13 are both communicated with the water tank 11, the water pump 13 is communicated with the purification pipe 4 through the water outlet pipe 14, a second valve is arranged in the water outlet pipe 14, the water pump 13 and the second valve are both electrically connected with the PLC, and one end of the water outlet pipe 14, which is far away from the water pump 13, is located above the dust filter 9;

the pressurizing mechanism comprises a pressurizing assembly, a pressurizing plate 15 and two ventilating assemblies, the pressurizing assembly is positioned above the pressurizing plate 15 and is in transmission connection with the pressurizing plate 15, the periphery of the pressurizing plate 15 is in sealing connection with the inner wall of the purifying pipe 4, and the two ventilating assemblies are respectively positioned on two sides above the pressurizing plate 15;

when carrying out air purification, the subassembly of ventilating on the pressure plate 15 keeps the mediation, the circulation of air of the 15 both sides of pressure plate of being convenient for, when the filter screen 9 takes place to block up, PLC control subassembly of ventilating seals, then open the second valve, extract the rivers in the water tank 11 by water pump 13, pour into the top of filter screen 9 in the purge tube 4 through outlet pipe 14, and back pressure subassembly operation, drive pressure plate 15 downstream, make the water source on the filter screen 9 produce decurrent pressure to the filter screen 9 of below, extrude the metal particle who blocks up on filter screen 9 mesh, then the subassembly of ventilating is opened, the circulation of air of being convenient for.

As shown in fig. 2 and 4, the replacing mechanism includes a replacing chamber 16, a sealing block 17, a sealing cover 18, a handle 19, a moving assembly and a push plate 20, the replacing chamber 16 is fixed on the purifying tube 4, the replacing chamber 16 is located above the supporting frame 8, the sealing cover 18 is located above the replacing chamber 16, a plurality of activated carbon filter screens are uniformly arranged in the replacing chamber 16 from top to bottom, the handle 19 and the sealing block 17 are respectively fixed above and below the sealing cover 18, first openings are arranged on two sides of the bottom of the replacing chamber 16, second openings are arranged on inner walls of two sides in the purifying tube 4, the second openings are located above the supporting frame 8, the first openings are communicated with the second openings, iron plates 21 and magnets 22 are arranged in the second openings, the magnets 22 are fixed at the bottom in the second openings, the top ends of the iron plates 21 are hinged to the top in the second openings, the moving assembly is positioned below the replacing chamber 16, the moving assembly is in transmission connection with one end of the push plate 20, and the other end of the push plate 20 is positioned in the first opening of one end, far away from the purifying tube 4, of the two first openings.

When the activated carbon filter screen on the support frame 8 in the purifying tube 4 is saturated in adsorption, the moving component in the replacing mechanism operates, the push plate 20 is controlled to move towards the purifying tube 4, so that the push plate 20 drives the activated carbon filter screen at the bottom in the replacing chamber 16 to move towards the purifying tube 4 to extrude the iron plate 21 on the second opening, and simultaneously the activated carbon filter screen saturated in the purifying tube 4 is extruded from the second opening on the other side, so that the unused activated carbon filter screen in the replacing chamber 16 moves to the upper part of the support frame 8 to purify flowing air, then the moving component drives the push plate 20 to be far away from the purifying tube 4, the magnet 22 attracts the iron plate 21 on the upper part, so that the iron plate 21 blocks the second opening, when the push plate 20 moves out of the replacing chamber 16, the activated carbon filter screen in the replacing chamber 16 moves downwards, and when the activated carbon filter screen in the purifying tube 4 is saturated again, the moving component can, the push plate 20 is driven to extrude the saturated activated carbon filter screen out of the purifying tube 4, the unused activated carbon filter screen is extruded into the purifying tube 4, after the activated carbon filter screen in the replacing chamber 16 is used, workers can drive the sealing cover 18 to rotate through the handle 19, so that the sealing block 17 rotates out of the replacing chamber 16, and then the activated carbon filter screen can be supplemented and added into the replacing chamber 16.

As shown in fig. 4, the air guide assembly includes a first motor 23, a rotating shaft 24 and two fan blades 25, the first motor 23 is fixed in the purifying tube 4, the first motor 23 is electrically connected to the PLC, the two fan blades 25 are respectively located at two sides of the rotating shaft 24, and the first motor 23 is in transmission connection with the fan blades 25 through the rotating shaft 24.

PLC control first motor 23 starts, drives the flabellum 25 rotatory through pivot 24, produces the air current when flabellum 25 is rotatory, discharges the air in the purge tube 4 from blast pipe 6 for the pressure of purge tube 4 reduces, and outside atmospheric pressure is impressed the outside air in the purge tube 4 through inhaling cover 2 and the arm 3 of breathing in, through purifying the back, discharges from blast pipe 6, and the function to outside air purification has been realized to circulation like this.

Preferably, in order to detect the quality of the air discharged from the exhaust pipe 6, an air quality sensor 26 is provided in the exhaust pipe 6, and the air quality sensor 26 is electrically connected to the PLC. Utilize air quality sensor 26 to detect whether have harmful gas in the air that blast pipe 6 was discharged, when discovering harmful gas, show that the active carbon filter screen on the support frame 8 has reached saturation, change the operation of mechanism this moment, in time change the active carbon filter screen.

Preferably, in order to fix the height position of the activated carbon filter screen, the inner walls of the two sides of the purification pipe 4 are provided with a limiting plate 46, and the limiting plate 46 is located above the second opening. The active carbon filter screen is located between support frame 8 and the limiting plate 46 of fixed position for the position of active carbon filter screen has obtained fixedly, and when preventing that the air guide subassembly from moving, the air current drove the active carbon filter screen rebound and is smashed after contacting with flabellum 25, thereby has guaranteed the normal use of active carbon filter screen.

Preferably, in order to prompt people to add an activated carbon filter screen in time, a distance sensor 27 is arranged below the sealing block 17, a loudspeaker 44 is arranged on the purifying tube 4, and the distance sensor 27 and the loudspeaker 44 are both electrically connected with the PLC. Detect the distance between the barrier of sealed piece 17 and below through distance sensor 27 to give PLC with distance data feedback, when PLC detected distance data when too big, show that change the indoor activated carbon filter screen of 16 this moment and remain not much, then PLC control speaker 44 takes place the police dispatch newspaper, suggestion people in time to changing the indoor activated carbon filter screen of 16 internal replenishment.

As shown in fig. 2, the moving assembly includes an air pump 28, an air cylinder 29, a piston 30 and a connecting rod 31, the air cylinder 29 is fixed on the purge tube 4, the air pump 28 is electrically connected to the PLC, the air pump 28 is communicated with the air cylinder 29, one end of the piston 30 is disposed in the air cylinder 29, and the other end of the piston 30 is fixedly connected to the push plate 20 through the connecting rod 31.

PLC control air pump 28 starts, and to the gas transmission in the cylinder 29 or from cylinder 29 air extraction to change the atmospheric pressure in the cylinder 29, make piston 30 carry out corresponding removal, piston 30 drives push pedal 20 through connecting rod 31 and removes, in time changes the active carbon filter screen in the purge tube 4.

As shown in fig. 3, the pressurizing mechanism includes a second motor 32, a second connecting rod 33, a third connecting rod 34, a fourth connecting rod 35 and a fixing ring 36, the second motor 32 and the fixing ring 36 are both fixed in the purification tube 4, the second motor 32 is electrically connected with the PLC, the second motor 32 is in transmission connection with the second connecting rod 33, the second connecting rod 33 is in transmission connection with the top end of the fourth connecting rod 35 through the third connecting rod 34, the bottom end of the fourth connecting rod 35 is fixedly connected with the pressurizing plate 15, and the fixing ring 36 is sleeved on the fourth connecting rod 35.

The PLC controls the second motor 32 to start, drives the second connecting rod 33 to rotate, and the second connecting rod 33 acts on the top end of the fourth connecting rod 35 through the third connecting rod 34, so that the fourth connecting rod 35 drives the pressurizing plate 15 to move up and down in a reciprocating mode along the vertical direction under the limiting effect of the fixing ring 36.

As shown in fig. 3, the ventilation assembly includes a through hole, a third motor 37, a screw rod 38, a sleeve 39, a ventilation block 40, a limiting ring 41 and two brackets 42, the through hole is disposed on the pressure plate 15, the two brackets 42 are respectively located at two sides of the third motor 37, the third motor 37 is fixedly connected with the pressure plate 15 through the brackets 42, the third motor 37 is in transmission connection with the top end of the screw rod 38, the third motor 37 is electrically connected with the PLC, the sleeve 39 is sleeved at the bottom end of the screw rod 38, a screw thread matched with the screw rod 38 is disposed at the joint of the sleeve 39 and the screw rod 38, the limiting ring 41 is fixed between the two brackets 42, the limiting ring 41 is sleeved on the sleeve 39, the ventilation block 40 is located above the through hole, and the ventilation block 40 is fixed below the sleeve 39.

Utilize two supports 42 with increased pressure board 15 and third motor 37 fixed connection, PLC control third motor 37 starts, can drive lead screw 38 rotatory, lead screw 38 passes through the screw thread and acts on sleeve pipe 39, make sleeve pipe 39 under the limiting displacement of spacing ring 41, along the axis of lead screw 38, it removes to drive ventilation piece 40, when ventilation piece 40 stretches into in the through-hole downwards, block up the through-hole, increased pressure board 15 downstream this moment, accessible rivers extrude dirt screen 9 downwards, extrude the dirt particle, then control first valve and open, make the dirt particle along with rivers discharge, when ventilation piece 40 moves upwards, the through-hole exposes, be convenient for upwards flow through the air after the dirt screen 9 purifies.

Preferably, in order to prevent the activated carbon filter screen from falling, a backing plate 43 is arranged on the side of the purifying tube 4 away from the replacing chamber 16, and the backing plate 43 is positioned below the second opening. Can support the active carbon filter screen of extruding from the purge tube 4 through backing plate 43, prevent that the active carbon filter screen from smashing after falling down from the eminence, people of being convenient for in time take away the active carbon filter screen of absorption saturation on backing plate 43 when replenishing the active carbon filter screen.

Preferably, a flow meter 45 is provided in the purge pipe 4 to detect whether air flows, and the flow meter 45 is electrically connected to the PLC. Detect the air flow in the purge tube 4 through flowmeter 45 to give PLC with flow data feedback, when PLC detected flow data lower, show that circulation of air is not smooth this moment, then PLC control dredging mechanism and loading system cooperation operation dredge dust filter 9, thereby guarantee the circulation of air.

This weld cigarette purifier in the use, after filter screen 9 blocks up, the second valve is opened, the water solution in the water pump 13 extraction water tank 11 is carried to filter screen 9's top, then the subassembly of ventilating is sealed to pressure plate 15, drive pressure plate 15 downstream by the pressure subassembly, through extrusion rivers downwards, make rivers extrude metal particle, then the subassembly of ventilating is opened, it is smooth and easy to guarantee the circulation of air, and simultaneously, after the activated carbon filter screen adsorption saturation on support frame 8, drive push pedal 20 by the removal subassembly and remove, will change in the room 16 unused activated carbon filter screen crowded purge tube 4 in, simultaneously the activated carbon filter screen on the support frame 8 is extruded from the second opening in the purge tube 4, be convenient for purge tube 4 continuously purifies the inside air, thereby the practicality of equipment has been improved.

Compared with the prior art, this be convenient for circulate and welding cigarette purifier who changes passes through dredging mechanism and loading system cooperation operation, downwards extrudees rivers to extrude the metal granule on the dirt screen 9, guarantee the circulation of air, compare with current loading system, this loading system structure is nimble, the operation is reliable, moreover, can in time change the active carbon filter screen of absorption saturation in the purge tube 4 through change mechanism, guarantee the continuous purifying capacity of equipment to the air, thereby the practicality of equipment has been improved.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a weld cigarette purifier convenient to circulation and change, its characterized in that, includes base (1), cover (2) of breathing in, arm (3) of breathing in, purge tube (4), drain pipe (5), blast pipe (6), controller (7), change mechanism and mediation mechanism, purge tube (4) and controller (7) are all fixed in the top of base (1), be equipped with PLC in controller (7), the bottom at purge tube (4) is fixed in drain pipe (5), be equipped with first valve in drain pipe (5), cover (2) of breathing in is through the one side intercommunication of arm (3) of breathing in with the bottom of purge tube (4), mediation mechanism and change mechanism all are located the opposite side of purge tube (4), mediation mechanism is located the below of changing the mechanism, from the top down be equipped with air guide subassembly in proper order in purge tube (4), The device comprises a support frame (8), a pressurizing mechanism and a dust filtering net (9), wherein the support frame (8) and the dust filtering net (9) are fixed in a purifying pipe (4), a first valve is electrically connected with a PLC, and universal wheels (10) are arranged below four corners of a base (1);

the dredging mechanism comprises a water tank (11), a water injection pipe (12), a water pump (13) and a water outlet pipe (14), the water tank (11) is fixed on the base (1), the water pump (13) and the water injection pipe (12) are both fixed above the water tank (11), the water injection pipe (12) and the water pump (13) are both communicated with the water tank (11), the water pump (13) is communicated with the purification pipe (4) through the water outlet pipe (14), a second valve is arranged in the water outlet pipe (14), the water pump (13) and the second valve are both electrically connected with the PLC, and one end of the water outlet pipe (14), which is far away from the water pump (13), is positioned above the dust filter (9);

the pressurizing mechanism comprises a pressurizing assembly, a pressurizing plate (15) and two ventilating assemblies, the pressurizing assembly is positioned above the pressurizing plate (15), the pressurizing assembly is in transmission connection with the pressurizing plate (15), the periphery of the pressurizing plate (15) is in sealing connection with the inner wall of the purifying pipe (4), and the two ventilating assemblies are respectively positioned on two sides above the pressurizing plate (15);

the replacing mechanism comprises a replacing chamber (16), a sealing block (17), a sealing cover (18), a handle (19), a moving assembly and a push plate (20), wherein the replacing chamber (16) is fixed on the purifying pipe (4), the replacing chamber (16) is positioned above the supporting frame (8), the sealing cover (18) is positioned above the replacing chamber (16), a plurality of activated carbon filter screens are uniformly arranged in the replacing chamber (16) from top to bottom, the handle (19) and the sealing block (17) are respectively fixed above and below the sealing cover (18), first openings are arranged on two sides of the bottom of the replacing chamber (16), second openings are arranged on inner walls of two sides in the purifying pipe (4), the second openings are positioned above the supporting frame (8), the first openings are communicated with the second openings, iron plates (21) and magnets (22) are arranged in the second openings, magnet (22) are fixed in the intraoral bottom of second opening, the top and the intraoral top of second opening of iron plate (21) are articulated, the removal subassembly is located the below of changing room (16), the removal subassembly is connected with the one end transmission of push pedal (20), the other end of push pedal (20) is arranged in the first opening of the one end of keeping away from purge tube (4) in two first openings.

2. The welding fume purification device convenient for circulation and replacement as claimed in claim 1, wherein the air guide assembly comprises a first motor (23), a rotating shaft (24) and two fan blades (25), the first motor (23) is fixed in the purification tube (4), the first motor (23) is electrically connected with the PLC, the two fan blades (25) are respectively located at two sides of the rotating shaft (24), and the first motor (23) is in transmission connection with the fan blades (25) through the rotating shaft (24).

3. Welding fume purification device facilitating circulation and replacement according to claim 1, characterized in that an air quality sensor (26) is arranged in the exhaust pipe (6), and the air quality sensor (26) is electrically connected with the PLC.

4. The welding fume purification device convenient for circulation and replacement as claimed in claim 1, wherein the inner walls of both sides of the purification tube (4) are provided with a limiting plate (46), and the limiting plate (46) is positioned above the second opening.

5. The welding fume purification device convenient for circulation and replacement as claimed in claim 1, wherein a distance sensor (27) is arranged below the sealing block (17), a loudspeaker (44) is arranged on the purification tube (4), and both the distance sensor (27) and the loudspeaker (44) are electrically connected with the PLC.

6. The welding fume purification device convenient for circulation and replacement as claimed in claim 1, wherein the moving assembly comprises an air pump (28), an air cylinder (29), a piston (30) and a connecting rod (31), the air cylinder (29) is fixed on the purification tube (4), the air pump (28) is electrically connected with the PLC, the air pump (28) is communicated with the air cylinder (29), one end of the piston (30) is arranged in the air cylinder (29), and the other end of the piston (30) is fixedly connected with the push plate (20) through the connecting rod (31).

7. The welding fume purification device convenient for circulation and replacement as claimed in claim 1, wherein the pressurization mechanism comprises a second motor (32), a second connecting rod (33), a third connecting rod (34), a fourth connecting rod (35) and a fixing ring (36), the second motor (32) and the fixing ring (36) are both fixed in the purification tube (4), the second motor (32) is electrically connected with the PLC, the second motor (32) is in transmission connection with the second connecting rod (33), the second connecting rod (33) is in transmission connection with the top end of the fourth connecting rod (35) through the third connecting rod (34), the bottom end of the fourth connecting rod (35) is fixedly connected with the pressurization plate (15), and the fixing ring (36) is sleeved on the fourth connecting rod (35).

8. The welding fume purification device convenient for circulation and replacement as claimed in claim 1, wherein the ventilation assembly comprises a through hole, a third motor (37), a screw rod (38), a sleeve (39), a ventilation block (40), a limiting ring (41) and two brackets (42), the through hole is arranged on the pressure plate (15), the two brackets (42) are respectively arranged at two sides of the third motor (37), the third motor (37) is fixedly connected with the pressure plate (15) through the brackets (42), the third motor (37) is in transmission connection with the top end of the screw rod (38), the third motor (37) is electrically connected with the PLC, the sleeve (39) is sleeved at the bottom end of the screw rod (38), a thread matched with the screw rod (38) is arranged at the joint of the sleeve (39) and the screw rod (38), and the limiting ring (41) is fixed between the two brackets (42), the limiting ring (41) is sleeved on the sleeve (39), the ventilation block (40) is located above the through hole, and the ventilation block (40) is fixed below the sleeve (39).

9. Welding fume cleaning device for circulation and replacement according to claim 1, characterized in that the side of the cleaning tube (4) remote from the replacement chamber (16) is provided with a backing plate (43), said backing plate (43) being located below the second opening.

10. Welding fume purification device facilitating circulation and replacement according to claim 1, characterized in that a flow meter (45) is arranged in the purification tube (4), and the flow meter (45) is electrically connected with the PLC.