Welding protective cover for collecting and purifying welding fume

Abstract

The utility model discloses a welding protective cover for collecting and purifying welding fume. The welding protective cover comprises a protective mask, a handle, a battery system, an air draft system, a purification system and a fume collecting cover, the whole protective mask is rectangular and is formed by machining a single-layer protective panel, a window is arranged on the upper middle portion of the protective mask, a battery system, an air draft system and a purification system are arranged on the lower middle portion of the protective mask, and a handle is arranged in the middle of the lower end of the protective mask. The smoke collecting cover is arranged outside the protective mask and is in flexible closed connection with the purification system through a telescopic hose, and the purification system is arranged between the air draft system and the smoke collecting cover and is in closed connection with the air draft system; the smoke dust collecting cover is provided with a smoke dust inlet, and the exhaust system is provided with a purified gas outlet; and the battery system supplies power to the exhaust system through a wire. The device is small in size, flexible to operate and convenient to carry, avoids pollution to the welding environment, and protects the body health of welding workers.

Description

Technical Field

[0001] The utility model belongs to the field of environmental protection, and in particular relates to a welding protective cover used for collecting and purifying welding smoke. Background Art

[0002] Welding is a manufacturing process and technology that joins metals or other thermoplastic materials by heating or pressurizing. It is widely used due to its good economy and reliable connection. Fusion welding is the most commonly used welding method. A molten pool is formed by heating, and molten fillers are usually added to assist. The metal connection is achieved after the molten pool cools and solidifies. However, during the heating process, the welding core, flux, coating and other molten fillers and base materials melt, evaporate and oxidize at high temperatures, producing a large amount of harmful fumes of metal oxides and other substances. If not handled, on the one hand, it will pollute the environment, and inhalation of fumes will pose a serious threat to the health of welders and people near welding. On the other hand, the harsh welding environment with slow air circulation and closed space will greatly reduce the welding efficiency and affect the welding quality.

[0003] Chinese patent CN 115625409 B discloses a fully automatic radiator welding device, which achieves a high treatment efficiency for welding smoke, but the overall size of the welding device is large, which is not conducive to flexible welding in multiple positions on the construction site; Chinese patent CN 218945880 U discloses a pole steel frame welding smoke collection and purification device, which can absorb and purify the smoke, but the installation and commissioning of the purification device are relatively complicated, and it is difficult to collect welding smoke in a small space. Utility Model Content

[0004] In order to solve the problems of existing welding fume purification technology, such as large size, inflexible operation, and lack of portability, the utility model provides a welding protective cover for collecting and purifying welding fume.

[0005] The utility model provides a welding protective cover for collecting and purifying welding smoke, comprising a protective mask, a handle, a battery system, an exhaust system, a purification system and a smoke collection cover; the protective mask is rectangular as a whole, and is processed from a single-layer protective panel, a window is provided in the middle and upper part of the protective mask, a battery system, an exhaust system and a purification system are provided in the middle and lower part of the protective mask, and the handle is provided at the middle position of the lower end of the protective mask; the smoke collection cover is provided outside the protective mask and is flexibly and tightly connected with the purification system through a retractable hose, the purification system is provided between the exhaust system and the smoke collection cover and is tightly connected with the exhaust system; the smoke collection cover is provided with a smoke inlet, and the exhaust system is provided with a purified gas outlet; the battery system supplies power to the exhaust system through electric wires.

[0006] The protective mask is made of metal or non-metal flame-retardant and heat-insulating material, preferably has a length of 15 to 60 cm and a height of 40 to 80 cm. During welding, the protective mask is located between the welder and the welding workpiece to protect the welder from burns and scalds caused by the welding high temperature and electric welding arc.

[0007] A transparent window is set on the protective mask so that the welder can observe the welded parts through the window and complete the welding of the welded parts. The window should be opened in the upper middle part of the protective mask and the size should not be less than 8cm*5cm.

[0008] The handle is convenient for welding workers to hold the protective cover; the handle can be made of plastic or hollow metal, preferably a cylindrical handle with a length of 20 cm to 60 cm.

[0009] The battery system is composed of batteries, switches, conductive wires, etc. The batteries can be lithium, lead-acid, nickel-metal hydride and other storage batteries. It is preferred that the batteries have large capacity, small size, light weight, and are easy to replace, so as to reduce the labor intensity and load of workers, extend working hours, and improve work efficiency. The battery is connected to the exhaust system through wires to provide energy for the exhaust system to generate suction force for welding fumes. The corresponding batteries are equipped according to the parameters such as the voltage and power required by the exhaust system. The batteries can be fixed to the protective mask by screws, bonding, etc. From the perspective of labor saving and easy layout, the battery system should be located at the bottom of the protective mask and close to the exhaust system. The size of the battery system should be within 20cm*15cm*6cm.

[0010] The exhaust system includes a motor and blades. Under the action of the electric energy provided by the battery system, the motor is driven to rotate, and the blades connected to the motor are driven to rotate by the rotation of the motor, forming a negative pressure at the smoke inlet, collecting and inhaling the welding smoke, and after purification through the purification system, it is discharged to the atmosphere through the purified gas outlet; the pressure difference generated by the exhaust system should enable the smoke to overcome the flow resistance and the pressure drop of the purification system, etc. In order to ensure a good suction effect on the welding smoke, the exhaust system should generally be able to generate a negative pressure of at least 800Pa, and the air suction speed at the smoke inlet should reach more than 6m / s. The rotating blades used in the exhaust system should be plastic to minimize the weight of the welding protective cover when generating the same suction force. In order to ensure a certain suction effect, the size of the exhaust system should be within 30cm*30cm*10cm, and it should be fixed to the protective cover and the outlet of the purification system by screws or the like.

[0011] The smoke collecting hood is in a cone shape with a large bottom and a small top, one end of which is connected to a telescopic hose and the other end is a smoke inlet. The welding smoke can be collected at a closer distance by extending and adjusting the smoke collecting hood and the telescopic hose.

[0012] As an improvement, in order to make the weight of the welding shield relatively uniform and coordinated, it is recommended that the battery system and the exhaust system be arranged symmetrically, that is, the battery system is on the left side of the protective mask and the exhaust system is on the right side of the protective mask, and vice versa.

[0013] As a further improvement, a grid-shaped protective net should be installed at the entrance and exit of the exhaust system to prevent solid particles with larger diameters from entering the exhaust system and damaging the blades; it also forms a physical isolation of the exhaust system for welders and other personnel to prevent personal injury that may be caused by rotating blades.

[0014] The purification system can be a purification method of physically adsorbing smoke such as activated carbon, or a chemical treatment method such as liquid. The purpose is to absorb and fix the harmful gas phase and solid phase in the smoke. After the welding smoke passes through the purification system, the harmful gas phase and solid phase remain in the purification system or are absorbed by reaction, and the purified smoke returns to the atmosphere. The purification element of the purification system should be easy to replace and can be replaced in time when the purification treatment effect is reduced. The purification system consists of a purification chamber and a purification element in the purification chamber. The purification element can be activated carbon, alkaline absorption liquid, etc. The replacement of the purification element can be to unload the purification element from the purification chamber and refill it, or to replace the purification chamber as a whole. The size of the purification system should be within 30cm*30cm*10cm. In order to reduce the pressure drop of the purification system, the purification method of physical adsorption of smoke is preferred. Through an adsorbent with a large specific surface area, when the welding smoke passes through an adsorbent such as activated carbon, harmful gases and solids are stored on the surface and internal pores of the adsorbent, so as to achieve the purpose of purifying the smoke. Activated carbon adsorbents can be selected from granular activated carbon such as cylindrical, spherical, hollow cylindrical and hollow spherical crushed carbon, or carbon molecular sieves, microspherical carbon, activated carbon nanotubes, activated carbon fibers and other varieties of adsorbents to achieve improved absorption and purification effects under low pressure drop. Under normal circumstances, the pressure drop of the purification system should be controlled within 600Pa.

[0015] Furthermore, in order to provide better protection for welding workers, the protective mask can be made into a curved shape. In order to achieve better smoke absorption effect and reduce resistance during the flow process, the protective mask should be bent and face the side of the welding workpiece.

[0016] Furthermore, in order to prevent foreign matter from entering the welding fume purification device and blocking the conveying space when the device is not in operation, a cover having the same shape as the fume inlet of the fume collection hood can be provided to seal the fume inlet.

[0017] Furthermore, in order to prevent the high temperature of welding and solid splashing, etc. from possibly causing damage to the battery system and the exhaust system, the battery system and the exhaust system are preferably arranged behind the protective mask.

[0018] Furthermore, a temperature sensor is provided in the purification system or the conveying air duct. When the temperature of the fume purification system rises to a certain value due to the absorption of high-temperature welding fume, the sensor alarms to prompt the welding worker to stop welding operations.

[0019] As a further improvement, in order to make full use of the space inside the handle, the purification system can also be set inside the handle, or the battery system can be set inside the handle. In short, the internal space of the handle can be used to further reduce the volume of the protective mask. Under the guidance of the above ideas, the utility model provides another welding protective mask for collecting and purifying welding fumes, including a protective mask, a handle, a battery system, an exhaust system, a purification system and a fume collection hood; the protective mask is rectangular as a whole and is made of a single-layer protective panel. A window is provided in the middle and upper part of the protective mask, and an exhaust system and a purification system are provided in the middle and lower part of the protective mask. The handle is provided in the middle position of the lower end of the protective mask, the handle is hollow inside, and the battery system is provided in the internal space of the handle; the fume collection hood is provided outside the protective mask and forms a flexible and closed connection with the purification system through a retractable hose, and the purification system is provided between the exhaust system and the fume collection hood and forms a closed connection with the exhaust system; the fume collection hood is provided with a fume inlet, and the exhaust system is provided with a purified gas outlet; the battery system supplies power to the exhaust system through electric wires.

[0020] The utility model has the following beneficial effects:

[0021] 1) By collecting and purifying welding fumes before discharging, the pollution to the environment caused by welding can be greatly reduced; at the same time, the operating environment of welders can be greatly improved, which is beneficial to the physical and mental health of welders, and helps to continuously weld and improve welding work efficiency;

[0022] 2) The welding protective cover of the utility model is small in size, light in weight, easy to carry, and can be applied to welding at multiple angles, especially suitable for welding at construction sites. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A structural schematic diagram of a welding protective cover of the utility model;

[0024] Figure 2 For Figure 1 Schematic diagram of the top view structure.

[0025] In the figure: 1-protective mask, 2-window, 3-electric wires, 4-battery system, 5-retractable hose, 6-smoke collection hood, 7-smoke inlet, 8-handle, 9-purification system, 10-exhaust system, 11-purified gas outlet. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings.

[0027] like Figure 1 and Figure 2 As shown, the welding protective cover of the utility model comprises a protective mask 1, a handle 8, a battery system 4, an exhaust system 10, a purification system 9 and a smoke collecting cover 6; the protective mask 1 is rectangular as a whole and is processed from a single-layer protective panel, a window 2 is provided in the middle and upper part of the protective mask 1, a battery system 4, an exhaust system 10 and a purification system 9 are provided in the middle and lower part of the protective mask 1, and the handle 8 is provided at the middle position of the lower end of the protective mask 1; the smoke collecting cover 6 is provided outside the protective mask 1 and forms a flexible and closed connection with the purification system 9 through a retractable hose 5, the purification system 9 is provided between the exhaust system 10 and the smoke collecting cover 6 and forms a closed connection with the exhaust system 10; the smoke collecting cover 6 is provided with a smoke inlet 7, and the exhaust system 10 is provided with a purified gas outlet 11; the battery system 4 supplies power to the exhaust system 10 through the wire 3; the battery system 4 and the exhaust system 10 are symmetrically provided on the protective mask on one side of the welder.

[0028] The periphery of the protective mask 1 is bent toward the side of the welding workpiece, and the purified gas outlet 11 is toward the side of the welding worker; of course, when the periphery of the protective mask 1 is bent toward the side of the welding workpiece, the purified gas outlet 11 can also be toward the side of the welding workpiece; similarly, when the periphery of the protective mask 1 is bent toward the side of the welding worker, the purified gas outlet 11 can be toward the side of the welding worker or toward the side of the welding workpiece.

[0029] Combine the following Figure 1 The working principle of the utility model is described as follows:

[0030] When working, the welder holds the handle 8 and covers his face with the protective mask 1, places the smoke collecting hood 7 on the welding workpiece, turns on the battery system 4 to supply power to the exhaust system 10, and the exhaust system 10 starts to work; after welding starts, the blades of the exhaust system 10 rotate to form a negative pressure at the smoke inlet 7, collects and inhales the welding smoke and enters the purification system 9 through the retractable hose 5, in the purification system 9, the harmful gas phase and solid phase in the welding smoke remain in the purification system or are absorbed by the purification system through reaction, and the purified smoke is discharged into the atmosphere through the purified gas outlet 11, thereby avoiding pollution of the welding environment and protecting the health of the welders.

Claims

1. A welding protective cover for collecting and purifying welding fumes, characterized in that: It includes a protective mask, a handle, a battery system, an exhaust system, a purification system and a smoke collection hood; the protective mask is rectangular as a whole and is made of a single-layer protective panel. A window is provided in the middle and upper part of the protective mask, and a battery system, an exhaust system and a purification system are provided in the middle and lower part of the protective mask. The handle is provided in the middle position of the lower end of the protective mask; the smoke collection hood is provided outside the protective mask and forms a flexible and closed connection with the purification system through a retractable hose, and the purification system is provided between the exhaust system and the smoke collection hood and forms a closed connection with the exhaust system; the smoke collection hood is provided with a smoke inlet, and the exhaust system is provided with a purified gas outlet; the battery system supplies power to the exhaust system through electric wires.

2. The welding shield according to claim 1, characterized in that: The periphery of the protective mask is bent toward the welding worker, and the purified gas outlet is toward the welding workpiece.

3. The welding shield according to claim 1, characterized in that: The periphery of the protective mask is bent toward the side of the welding workpiece, and the purified gas outlet is toward the side of the welding worker.

4. The welding shield according to claim 1, characterized in that: The periphery of the protective mask is bent toward one side of the welding workpiece, and the purified gas outlet faces the side of the welding workpiece.

5. The welding shield according to claim 1, characterized in that: The periphery of the protective mask is bent toward the welder, and the purified gas outlet faces the welder.

6. The welding shield according to any one of claims 1 to 5, characterized in that: The battery system and the exhaust system are symmetrically arranged on the protective mask on one side of the welding worker.

7. A welding protective cover for collecting and purifying welding fumes, characterized in that: It includes a protective mask, a handle, a battery system, an exhaust system, a purification system and a smoke and dust collection hood; the protective mask is rectangular as a whole and is made of a single-layer protective panel. A window is provided in the middle and upper part of the protective mask, and an exhaust system and a purification system are provided in the middle and lower part of the protective mask. The handle is provided in the middle position of the lower end of the protective mask, the handle is hollow inside, and the battery system is provided in the internal space of the handle; the smoke and dust collection hood is provided outside the protective mask and forms a flexible and closed connection with the purification system through a retractable hose, the purification system is provided between the exhaust system and the smoke and dust collection hood and forms a closed connection with the exhaust system; the smoke and dust collection hood is provided with a smoke inlet, and the exhaust system is provided with a purified gas outlet; the battery system supplies power to the exhaust system through electric wires.

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