CN215962770U - Environment-friendly welding fume purification equipment - Google Patents
Environment-friendly welding fume purification equipment Download PDFInfo
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- CN215962770U CN215962770U CN202121790656.XU CN202121790656U CN215962770U CN 215962770 U CN215962770 U CN 215962770U CN 202121790656 U CN202121790656 U CN 202121790656U CN 215962770 U CN215962770 U CN 215962770U
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Abstract
The utility model relates to environment-friendly welding fume purification equipment which comprises a welding fume collecting head, a main purification box, an auxiliary purification box, a drainage tube, a drainage fan, an auxiliary filter, a main filter, a water washing box and a driving circuit, wherein the main purification box is communicated with the auxiliary purification box through a diversion tube, the auxiliary purification box is communicated with the welding fume collecting head through the drainage tube, the main filter, the drainage fan and the water washing box are sequentially arranged in the main purification box from top to bottom along the axial direction of the main purification box, the drainage fan is respectively communicated with the main filter and the water washing box through the diversion tube, the drainage fan, the auxiliary filter and the drainage fan are sequentially arranged in the auxiliary purification box from top to bottom along the axial direction of the auxiliary purification box, and the driving circuit is embedded at the bottom of the main purification box. The novel welding fume purification device can effectively meet the requirement of rapid purification operation of welding fume in various complex environments, and has high working efficiency and good purification quality of purification operation; on the other hand, compared with the traditional welding fume purification equipment, the material loss and the energy loss during the welding fume purification operation are effectively reduced.
Description
Technical Field
The utility model relates to an environment-friendly welding fume purification device, and belongs to the technical field of air purification devices.
Background
At present, a large amount of toxic and harmful welding fume is often generated in welding operation, various welding fume purification devices are developed aiming at the welding fume at present, such as a single-fan welding fume absorption purifier with the patent application number of 201320518285.9, a low-noise welding fume purifier with the application number of 201920677157.6, a welding fume purifier with a welding gun mask with the application number of 202020625179.0 and other devices, although the use requirements can be met to a certain degree, on one hand, the traditional welding fume purification devices are complex in device structure, poor in operation and use flexibility and convenience, only can meet the operation requirements of specific use environments, and the working efficiency of the welding fume purification operation is low; on the other hand is in the purification operation, and current clarification plant moves, often need use a large amount of consumptive materials such as filter screen, and the reuse rate of consumptive material is low, and life is shorter relatively to running cost, energy consumption and material loss homogeneous phase are higher relatively when leading to welding cigarette filtering operation.
Therefore, in order to solve the problem, a brand new welding fume purification device is urgently needed to be developed to meet the requirement of practical use.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects in the prior art, the utility model provides the environment-friendly welding fume purification equipment, which has the advantages of simple system structure, flexible and convenient operation, capability of effectively realizing the requirement of rapid purification operation of welding fume in various complex environments, high work efficiency of the purification operation and good purification quality; on the other hand than traditional welding fume purification equipment, the material loss and the energy loss during welding fume purification operation are effectively reduced, and therefore the purposes of effectively reducing the operation energy consumption, cost and equipment control operation difficulty of welding fume purification operation are achieved.
In order to achieve the purpose, the utility model is realized by the following technical scheme:
an environment-friendly welding fume purification device comprises a welding fume collecting head, a main purification box, at least two auxiliary purification boxes, a drainage tube, a drainage fan, an auxiliary filter, a main filter, a water washing box and a driving circuit, wherein the main purification box is communicated with the auxiliary purification boxes through a diversion tube, the auxiliary purification boxes are connected in parallel, the auxiliary purification boxes are communicated with the welding fume collecting head through the drainage tube, the welding fume collecting head is hinged with the drainage tube through a universal tube head, the main purification box and the auxiliary purification boxes are of cavity structures with rectangular axial sections and vertical axial lines to a horizontal plane, the main filter, the drainage fan and the water washing box are sequentially arranged in the main purification box from top to bottom along the axial line direction of the main purification box, the drainage fan is respectively communicated with the main filter and the water washing box through the diversion tube, an operation port and an exhaust port are arranged on the side surface of the main purification box corresponding to the water washing box, the air inlet is established to the main purifying box up end that main purifying box corresponds, establish drainage fan from the top down along auxiliary purifying box axis direction in the auxiliary purifying box in proper order, auxiliary filter and drainage fan, wherein auxiliary filter up end and lower terminal surface are respectively through honeycomb duct and drainage fan intercommunication, and an air inlet is established to the auxiliary purifying box up end, the gas vent is established to the terminal surface under the lateral wall, and the drainage fan intercommunication of air inlet and auxiliary filter top, the gas vent communicates with the drainage fan below the auxiliary filter, drive circuit inlays in main purifying box bottom, and communicate with drainage fan respectively.
Furthermore, the inner surfaces of the side walls of the drainage fan, the auxiliary filter, the main purification box and the auxiliary purification box are in sliding connection through sliding chutes, the side walls of the main purification box and the auxiliary purification box corresponding to the auxiliary filter and the main filter are provided with access holes, the volume of the auxiliary filter and the volume of the main filter are uniformly distributed and smaller than 1/2 of the volume of the main purification box and the auxiliary purification box where the auxiliary filter and the main filter are located, wherein the pipe walls of the flow guide pipes connected above and below the auxiliary filter and the main filter are provided with at least one air quality sensor and one air pressure sensor, the air outlets of the main purification box and the auxiliary purification box are provided with one air quality sensor, and the air quality sensor and the air pressure sensor are both electrically connected with a driving circuit.
Further, the main filter including bear frame, filter, damping spring and sealed welt, bear the frame for with the cylindrical frame construction of main purifying box coaxial distribution, the filter is a plurality of, inlay in bearing frame and main purifying box coaxial distribution to with main filter axis vertical distribution, the filter passes through spout sliding connection with bearing frame internal surface, through four at least damping spring interconnect between two adjacent filter plates, damping spring encircles and bears a frame axis equipartition, and damping spring axis and filter vertical distribution, sealed welt is a plurality of, and the cladding is respectively bearing frame lateral surface and internal surface, and bears frame through sealed welt and main purifying box medial surface and filter lateral surface sliding connection.
Furthermore, the auxiliary filter comprises a bearing shaft, a positioning keel, a filter screen plate, a driving motor, an encoder and a sealing ring, the bearing shaft is perpendicular to and intersected with the axis of the auxiliary purifying box, and the lateral surface of the bearing shaft is uniformly provided with a plurality of positioning grooves which are uniformly distributed around the axis of the bearing shaft, each positioning groove is connected with a positioning keel, the positioning keel is a frame structure with a rectangular cross section, at least one sealing ring is arranged on the outer side surface of the filter screen plate and is connected with the inner surface of the side wall of the auxiliary purifying box in a sliding way through the sealing ring, a plurality of filter screen plates are arranged, and at least one filter screen is arranged in each positioning keel, the filter screen and the positioning keel are coaxially distributed, and is connected with the inner surface of the side wall of the positioning keel in a sliding way, the driving motor is positioned outside the auxiliary purifying box, and are respectively connected with the bearing shaft and the encoder, and the driving motor and the encoder are electrically connected with the driving circuit.
Furthermore, the water washing box comprises a water tank, an aeration pipe and an electrostatic adsorption net, wherein the water tank is of a closed cavity structure with a rectangular cross section, an inlet and an outlet are arranged on the upper end face of the water tank, the inlet is respectively communicated with a drainage fan and the aeration pipe through a guide pipe, at least one aeration pipe is positioned in the water tank and connected with the bottom of the water tank, the aeration pipe is distributed in a spiral line structure distributed around the axis of the water tank, the outlet is communicated with an exhaust port through the guide pipe, the electrostatic adsorption net is embedded in the water tank and coaxially distributed with the water tank, the electrostatic adsorption net is 0-10 mm lower than the upper end face of the water tank and at least 10 mm higher than the liquid level in the water tank, and the electrostatic adsorption net is electrically connected with a driving circuit.
Furthermore, the driving circuit is a data processing circuit based on an industrial single chip microcomputer, a serial communication circuit and an auxiliary driving storage battery are additionally arranged, and the serial communication circuit and the auxiliary driving storage battery are electrically connected with the driving circuit.
On one hand, the novel welding fume purification device is simple in system structure, flexible and convenient to operate, capable of effectively meeting the requirement of rapid purification operation of welding fume in various complex environments, high in working efficiency of purification operation and good in purification quality; on the other hand than traditional welding fume purification equipment, the material loss and the energy loss during welding fume purification operation are effectively reduced, and therefore the purposes of effectively reducing the operation energy consumption, cost and equipment control operation difficulty of welding fume purification operation are achieved.
Drawings
The utility model is described in detail below with reference to the drawings and the detailed description;
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is a schematic view of the main purification box;
FIG. 3 is a schematic view of the structure of an auxiliary purifying box;
FIG. 4 is a schematic view of the main filter construction;
FIG. 5 is a schematic view of an auxiliary filter;
fig. 6 is a schematic view of the structure of the water washing tank.
Detailed Description
In order to facilitate the implementation of the technical means, creation features, achievement of the purpose and the efficacy of the utility model, the utility model is further described below with reference to specific embodiments.
As shown in figures 1-6, an environment-friendly welding fume purification device comprises a welding fume collecting head 1, a main purification box 2, auxiliary purification boxes 3, a drainage tube 4, a drainage fan 5, an auxiliary filter 6, a main filter 7, a water washing box 8 and a driving circuit 9, wherein the main purification box 2 is communicated with the auxiliary purification boxes 3 through a drainage tube 10, at least two auxiliary purification boxes 3 are connected in parallel, the auxiliary purification boxes 3 are communicated with the welding fume collecting head 1 through the drainage tube 4, the welding fume collecting head 1 is hinged with the drainage tube 4 through a universal tube head 11, the main purification box 2 and the auxiliary purification boxes 3 are of a cavity structure with rectangular axial cross sections and vertical axial lines to a horizontal plane, the main filter 7, the drainage fan 5 and the water washing box 8 are sequentially arranged in the main purification box 2 from top to bottom along the axial line direction of the main purification box 2, and the drainage fan 5 is respectively connected with the main filter 7, the water washing box 8 through the drainage tube 10, Washing case 8 intercommunication, 2 side surfaces of main purifying case that washing case 8 corresponds establish operation mouth 101 and gas vent 102, air inlet 103 is established to 2 up end of main purifying case that main purifying case 2 corresponds, establish drainage fan 5 from the top down along 3 axis directions of auxiliary purifying case in the auxiliary purifying case 3 in proper order, auxiliary filter 6 and drainage fan 5, wherein the terminal surface passes through honeycomb duct 10 and drainage fan 5 intercommunication respectively under auxiliary filter 3 up end and, and an air inlet 201 is established to 2 up end of auxiliary purifying case, gas vent 102 is established to the terminal surface under the lateral wall, and air inlet 201 and the drainage fan 5 intercommunication of auxiliary filter 6 top, gas vent 102 and the drainage fan 5 intercommunication of auxiliary filter 6 below, drive circuit 9 inlays in main purifying case 2 bottom, and communicate with drainage fan 5 respectively.
In this embodiment, the inner surfaces of the side walls of the drainage fan 5, the auxiliary filter 6, the main filter 7, the main purification box 2 and the auxiliary purification box 3 are slidably connected through a sliding chute 12, the side walls of the main purification box 2 and the auxiliary purification box 3 corresponding to the auxiliary filter 6 and the main filter 7 are provided with an access opening 13, the volume of the auxiliary filter 6 and the volume of the main filter 7 are uniformly distributed and less than 1/2 of the volume of the main purification box 2 and the auxiliary purification box 3 where the auxiliary filter 6 and the main filter 7 are located, wherein at least one air quality sensor 14 and an air pressure sensor 15 are respectively arranged on the tube walls of the flow guide tube 10 connected above and below the auxiliary filter 6 and the main filter 7, an air quality sensor 14 is additionally arranged at the exhaust port 102 of the main purification box 2 and the auxiliary purification box 3, and the air quality sensor 14 and the air pressure sensor 15 are both electrically connected with the driving circuit 9.
It is emphasized that, the main filter 7 includes a bearing frame 71, filter plates 72, damping springs 73 and a sealing lining plate 74, the bearing frame 71 is a cylindrical frame structure coaxially distributed with the main purification box 2, the filter plates 72 are a plurality of, are embedded in the bearing frame 71 and coaxially distributed with the main purification box 2, and are vertically distributed with the axis of the main filter 7, the filter plates 72 are slidably connected with the inner surface of the bearing frame 71 through sliding grooves 12, two adjacent filter plates 72 are connected with each other through at least four damping springs 73, the damping springs 73 are uniformly distributed around the axis of the bearing frame 71, the axes of the damping springs 73 are vertically distributed with the filter plates 72, the sealing lining plates are a plurality of, respectively coated on the outer side surface and the inner surface of the bearing frame 71, and the bearing frame 71 is slidably connected with the inner side surface of the main purification box 2 and the outer side surface of the filter plates 72 through the sealing lining plate 74.
Meanwhile, the auxiliary filter comprises a bearing shaft 61, a positioning keel 62, filter screen plates 63, a driving motor 64, an encoder 65 and a sealing ring 66, the bearing shaft 61 and the auxiliary purifying box are vertical and intersected, a plurality of positioning grooves 67 uniformly distributed around the axis of the bearing shaft 61 are uniformly distributed on the side surface of the bearing shaft 61, each positioning groove 67 is connected with one positioning keel 62, the positioning keel 62 is of a frame structure with a rectangular cross section, at least one sealing ring 66 is arranged on the outer side surface of the positioning keel 62 and is in sliding connection with the inner surface of the side wall of the auxiliary purifying box 3 through the sealing ring 66, a plurality of filter screen plates 63 are arranged, at least one filter screen plate 63 is arranged in each positioning keel 62, the filter screen plates 63 and the positioning keel 62 are coaxially distributed and are in sliding connection with the inner surface of the side wall of the positioning keel 62, the driving motor 64 is positioned outside the auxiliary purifying box and is respectively connected with the bearing shaft 61 and the encoder 65, the driving motor 64 and the encoder 65 are both electrically connected to the driving circuit 9.
In addition, the water washing tank 8 includes a water tank 81, an aeration pipe 82, and an electrostatic adsorption net 83, the water tank 81 is a closed cavity structure with a rectangular cross section, an inlet 84 and an outlet 85 are provided on the upper end surface, wherein the inlet 84 is respectively communicated with the flow guiding fan 5 and the aeration pipe 82 through a flow guiding pipe 10, at least one aeration pipe 82 is located in the water tank 81 and connected with the bottom of the water tank 81, the aeration pipe 82 is distributed in a spiral structure distributed around the axis of the water tank 81, the outlet 85 is communicated with an exhaust port 102 through the flow guiding pipe 5, the electrostatic adsorption net 83 is embedded in the water tank 81 and coaxially distributed with the water tank 81, the electrostatic adsorption net 83 is 0-10 mm lower than the upper end surface of the water tank 81 and at least 10 mm higher than the liquid level in the water tank 81, and the electrostatic adsorption net 83 is further electrically connected with the driving circuit 9.
Further, the driving circuit 9 is a data processing circuit based on an industrial single chip microcomputer, and is additionally provided with a serial communication circuit and an auxiliary driving storage battery pack, and the serial communication circuit and the auxiliary driving storage battery pack are electrically connected with the driving circuit.
This is novel in the concrete implementation, assembles this neotype welding cigarette collection head, main purifying box, supplementary purifying box, drainage tube, drainage fan, auxiliary filter, main filter, washing case and drive circuit that constitutes to at the prefabricated cleaning solution of washing incasement, then adjust supplementary purifying box, the quantity and the distribution position of welding cigarette collection head according to welding equipment's operating position, be connected drive circuit and outside power supply and control system simultaneously, can accomplish the novel assembly of cost.
During welding fume purification operation, the main purification box and the drainage fan in the auxiliary purification box are driven to operate simultaneously, a negative pressure environment is formed at the welding fume collecting head, so that welding fume generated during welding operation is extracted and collected through the welding fume collecting head, then the welding fume passing through the welding fume collecting head is conveyed into the auxiliary purification box along the drainage tube, the welding fume is purified through the auxiliary filter in the auxiliary purification box, the welding fume purified through the auxiliary filter is further driven in the main purification box by the drainage fan to cause the main purification box to be filtered and purified through the main filter in the main purification box, the welding fume filtered and purified through the main filter is conveyed into the water washing box, the welding fume is conveyed into the cleaning solution of the water washing box through the aeration pipe of the water washing box through aeration, the welding fume is washed and purified through the cleaning solution, and the welding fume purified through the water washing box is subjected to secondary adsorption and purification on solid particles and liquid drops of the welding fume through the electrostatic adsorption net of the water washing box again, the welding fume purification operation can be completed.
During purification operation, the cleaning solution is any one of water, alkali liquor, acid liquor and industrial oil, and when welding fume passes through the auxiliary purification box, the auxiliary filter is provided with a driving motor to drive the bearing shaft to rotate so that each filter screen plate is in rotating operation, so that on one hand, each filter screen plate is alternately subjected to filtering operation, and the distribution uniformity of the contact surface of the filter screen plate and the welding fume is improved; on the other hand, the distribution angle of the filter screen plate is adjusted to adjust the flow direction and angle of the welding smoke airflow, so that the welding smoke filtering operation efficiency is improved, and the service life of the filter screen plate is prolonged.
In addition, when the auxiliary filter operates, the air pressure of the upper end face of the auxiliary filter is higher than that of the lower end face of the auxiliary filter by adjusting the working efficiency of the drainage fans above and below the auxiliary filter, and the welding fume filtering and purifying efficiency is improved through the pressure difference between the upper end face and the lower end face of the auxiliary filter.
Meanwhile, when the main filter operates, the filter plates of the main filter perform elastic positioning on the filter plates through the damping springs when the filter plates filter welding smoke, vibration operation between the filter plates is achieved under the driving acting force of the drainage fan, and the solid particles adsorbed on the filter plates are separated and purified, so that the service life of the filter plates is prolonged, and the material loss and the use cost are reduced.
On one hand, the novel welding fume purification device is simple in system structure, flexible and convenient to operate, capable of effectively meeting the requirement of rapid purification operation of welding fume in various complex environments, high in working efficiency of purification operation and good in purification quality; on the other hand than traditional welding fume purification equipment, the material loss and the energy loss during welding fume purification operation are effectively reduced, and therefore the purposes of effectively reducing the operation energy consumption, cost and equipment control operation difficulty of welding fume purification operation are achieved.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (6)
1. The utility model provides a cigarette clarification plant is welded in environmental protection which characterized in that: the environment-friendly welding fume purification equipment comprises a welding fume collecting head, a main purification box, auxiliary purification boxes, drainage tubes, a drainage fan, auxiliary filters, a main filter, a water washing box and a driving circuit, wherein the main purification box is communicated with the auxiliary purification boxes through a diversion tube, the auxiliary purification boxes are at least two and are connected in parallel with each other, the auxiliary purification boxes are communicated with the welding fume collecting head through the drainage tubes, the welding fume collecting head is hinged with the drainage tubes through universal tube heads, the main purification box and the auxiliary purification boxes are of cavity structures with axial sections being rectangular and axes being vertically distributed with a horizontal plane, the main purification box is internally provided with the main filter, the drainage fan and the water washing box from top to bottom along the axial direction of the main purification box, the drainage fan is respectively communicated with the main filter and the water washing box through the diversion tube, the side surface of the main purification box corresponding to the water washing box is provided with an operation port and an exhaust port, the air inlet is established to the main purifying box up end that main purifying box corresponds, establish drainage fan, auxiliary filter and drainage fan from the top down in proper order along auxiliary purifying box axis direction in the auxiliary purifying box, wherein auxiliary filter up end and terminal surface pass through honeycomb duct and drainage fan intercommunication respectively down, and an air inlet is established to the auxiliary purifying box up end, and the gas vent is established to the terminal surface under the lateral wall, and the drainage fan intercommunication of air inlet and auxiliary filter top, the drainage fan intercommunication of gas vent and auxiliary filter below, drive circuit inlays in main purifying box bottom to communicate with drainage fan respectively.
2. The environmental protection welding fume purification device of claim 1, characterized in that: drainage fan, auxiliary filter, main filter and main purifying box, auxiliary purifying box lateral wall internal surface between pass through spout sliding connection, and the main purifying box that auxiliary filter, main filter correspond, auxiliary purifying box lateral wall establish the access hole, and auxiliary filter, main filter's volume equipartition is less than its place main purifying box, the volumetric 1/2 of auxiliary purifying box, wherein all establish at least one air mass sensor, baroceptor on the honeycomb duct pipe wall that auxiliary filter, main filter top and below are connected, an air mass sensor is established in addition to the exhaust port department of main purifying box, auxiliary purifying box, just air mass sensor, baroceptor all are connected with drive circuit electrical apparatus.
3. The environmental protection welding fume purification device of claim 1, characterized in that: main filter including bearing frame, filter, damping spring and sealed welt, bear the frame and be the columnar frame structure with the coaxial distribution of main purifying box, the filter is a plurality of, inlay in bearing frame and the coaxial distribution of main purifying box to distribute with main filter axis vertical, the filter passes through spout sliding connection with bearing frame internal surface, through four at least damping spring interconnect between two adjacent filter boards, damping spring encircles and bears a frame axis equipartition, and damping spring axis and filter vertical distribution, sealed welt is a plurality of, and the cladding is respectively bearing frame lateral surface and internal surface, and bears frame through sealed welt and main purifying box medial surface and filter lateral surface sliding connection.
4. The environmental protection welding fume purification device of claim 1, characterized in that: the auxiliary filter comprises a bearing shaft, a positioning keel, a filter screen plate, a driving motor, an encoder and a sealing ring, the bearing shaft is perpendicular to and intersected with the axis of the auxiliary purifying box, and the lateral surface of the bearing shaft is uniformly provided with a plurality of positioning grooves which are uniformly distributed around the axis of the bearing shaft, each positioning groove is connected with a positioning keel, the positioning keel is a frame structure with a rectangular cross section, at least one sealing ring is arranged on the outer side surface of the filter screen plate and is connected with the inner surface of the side wall of the auxiliary purifying box in a sliding way through the sealing ring, a plurality of filter screen plates are arranged, and at least one filter screen is arranged in each positioning keel, the filter screen and the positioning keel are coaxially distributed, and is connected with the inner surface of the side wall of the positioning keel in a sliding way, the driving motor is positioned outside the auxiliary purifying box, and are respectively connected with the bearing shaft and the encoder, and the driving motor and the encoder are electrically connected with the driving circuit.
5. The environmental protection welding fume purification device of claim 1, characterized in that: the water washing box comprises a water tank, aeration pipes and an electrostatic adsorption net, wherein the water tank is of a closed cavity structure with a rectangular cross section, an inlet and an outlet are formed in the upper end face of the water tank, the inlet is respectively communicated with a drainage fan and the aeration pipes through guide pipes, at least one aeration pipe is positioned in the water tank and connected with the bottom of the water tank, the aeration pipes are distributed in a spiral line structure distributed around the axis of the water tank, the outlet is communicated with an exhaust port through the guide pipes, the electrostatic adsorption net is embedded in the water tank and coaxially distributed with the water tank, the electrostatic adsorption net is 0-10 mm lower than the upper end face of the water tank and at least 10 mm higher than the liquid level in the water tank, and the electrostatic adsorption net is electrically connected with a driving circuit.
6. The environmental protection welding fume purification device of claim 1, characterized in that: the driving circuit is a data processing circuit based on an industrial single chip microcomputer, a serial communication circuit and an auxiliary driving storage battery are additionally arranged, and the serial communication circuit and the auxiliary driving storage battery are electrically connected with the driving circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121790656.XU CN215962770U (en) | 2021-08-02 | 2021-08-02 | Environment-friendly welding fume purification equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121790656.XU CN215962770U (en) | 2021-08-02 | 2021-08-02 | Environment-friendly welding fume purification equipment |
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| Publication Number | Publication Date |
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| CN215962770U true CN215962770U (en) | 2022-03-08 |
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| CN202121790656.XU Active CN215962770U (en) | 2021-08-02 | 2021-08-02 | Environment-friendly welding fume purification equipment |
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2021
- 2021-08-02 CN CN202121790656.XU patent/CN215962770U/en active Active
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