Negative pressure smoke dust collecting and purifying device for welding

Abstract

The invention discloses a negative-pressure smoke dust collecting and purifying device for welding, and relates to the technical field of welding smoke dust purification, the negative-pressure smoke dust collecting and purifying device comprises a bin, an air inlet pipe and an air outlet pipe are communicated with the bin, at least two filter cartridges are arranged in the bin, and protective parts which correspond to the filter cartridges in number and are used for shielding the filter cartridges are arranged in the bin; and the protection part is erected between the filter cartridges and is rotatably and fixedly mounted. According to the negative-pressure smoke dust collecting and purifying device for welding, the protection part is arranged between the filter cartridges, when the protection part separates the adjacent sides of the filter cartridges, after the pulse blowing mechanism is started to blow and clean the filter cartridges, blown dust between the filter cartridges cannot interfere with each other, and the dust is prevented from being blown by the pulse blowing mechanism. The dust removal device is particularly applied to horizontal type or oblique insertion type filter cartridges, dust blown off by all the filter cartridges located above the filter cartridges is blocked, an independent dust removal area is formed, and secondary attachment of the filter cartridges caused by dust diffusion can be effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of welding fume purification, and particularly to a negative pressure fume collection and purification device for welding. Background Art

[0002] The filtration efficiency of cartridge dust collectors for particulate matter ≥ 0.3μm in welding fume can reach over 99.9%, and even nano-coated cartridges can handle fume with smaller particle sizes.

[0003] Cartridge dust collectors are similar to bag dust collectors. However, most cartridge dust collectors are horizontal cartridges or inclined cartridge types. The advantage is that multiple horizontal cartridges can be installed vertically, requiring less floor space. And for inclined cartridges, they are installed in a 15° inclined drawer type, which is convenient for disassembly and replacement. However, since multiple cartridges are installed vertically, among which:

[0004] (1) The dust cleaning method of the cartridges is realized by pulse jetting. However, due to the vertical distribution of the cartridges and the limited space between the cartridges, dust is likely to spread to the surfaces of adjacent cartridges, causing secondary adhesion and reducing the dust cleaning efficiency.

[0005] (2) The side of the cartridge adjacent to the air inlet accumulates a large amount of dust, and the air inlet is mostly located above the cartridge. If the dust cleaning air flow does not completely cover it, and affected by the self-weight of the dust, local dust accumulation may be serious and difficult to clean.

[0006] To solve the above problems, we propose a negative pressure fume collection and purification device for welding. Summary of the Invention

[0007]

Technical Problems to be Solved

[0008] In view of the deficiencies of the prior art, the present invention provides a negative pressure fume collection and purification device for welding, which has the advantages of independent dust cleaning areas and targeted cleaning, and can effectively solve the problems in the background art.

[0009]

Technical Solution

[0010] To achieve the above object, the technical solution adopted by the present invention is: a negative pressure fume collection and purification device for welding, including a chamber, an air inlet pipe and an air outlet pipe are connected to the chamber, and at least two cartridges are arranged inside the chamber. It also includes a pulse jetting mechanism, and inside the chamber, there are protective members corresponding to the number of cartridges for shielding the cartridges. The protective members are installed between the cartridges in a rotatable and fixed manner.

[0011] Preferably, the intake pipe is fixedly connected to and communicates with the upper part of the bin, and the outlet pipe is also fixedly connected to the bin and communicates with the filter cartridge. The filter cartridge is detachably connected to the bin. The installation position of the filter cartridge includes any one of the installation methods such as horizontal, inclined insertion, and vertical placement, and the installation position of the filter cartridge is not limited.

[0012] Preferably, those skilled in the art can understand that the pulse jet mechanism includes an air bag and a solenoid valve, and the structure therebetween can be installed with reference to the prior art and will not be elaborated here.

[0013] Preferably, the protective member is rotatably and fixedly installed on the bin or can also be rotatably and fixedly installed on the filter cartridge.

[0014] Preferably, a maintenance door for taking out dust is provided on the bin.

[0015] Preferably, the filter cartridge is installed such that its axis is perpendicular to the intake direction of the soot. The protective member is configured as a non-full-coverage structure based on the filter cartridge, and the opening is provided to shield at least more than half of the outer surface area of the filter cartridge. The opening of the filter cartridge faces downward. In this way, during the subsequent formation of the water curtain, it can be ensured to the greatest extent that water will not wet the filter cartridge during the flow process. And when the protective member is in the shape of a semi-cylindrical structure, as Figure 2 shown in the structural state, due to its arc-shaped structure, the water curtain flows more smoothly along the arc surface of the protective member.

[0016] Preferably, a water passage member is provided inside the bin for spraying water towards the protective member, and the water flows through the surface of the protective member to form a water curtain in the flow path of the soot from the intake pipe to the filter cartridge.

[0017] Preferably, the water passage member is a water passage member such as a water pipe with a nozzle, which is externally connected to a water supply mechanism. The water supply mechanism includes a water pump and pipe fittings and is externally connected to a water source.

[0018] Preferably, the main body of the water passage member is fixed on the bin, and the water outlet part thereof is directly opposite to the central part of the protective member, so that the amount of water flowing to both sides of the filter cartridge is kept consistent to the greatest extent.

[0019] Preferably, a flow guiding member is provided inside the filter cartridge, which is communicated with the pulse jet mechanism and is used for uniformly guiding or unidirectionally guiding the jet airflow generated by the pulse jet mechanism.

[0020] Preferably, the flow guiding member includes an outer pipe, which is communicated with the pulse jet mechanism. A partition member is provided inside the outer pipe, and the partition member is also rotatably and fixedly installed. The inside of the outer pipe is divided into at least two chambers based on the partition member, and one or more through slots are provided on the outer pipe, and the number of the through slots is not more than the number of the chambers.

[0021] Preferably, the outer tube is fixedly connected to the filter cartridge or the bin. The partition member includes a rod, and a plurality of partition plates are distributed on the outer wall of the rod. Based on these partition plates, the interior of the outer tube is compartmentalized. To facilitate the rotational control of the partition member, the rod thereon extends from the interior of the outer tube through to its exterior.

[0022] Preferably, the flow guiding member further includes a spray pipe, and a second through groove is formed in the spray pipe. The spray pipe is also communicated with the pulse jet mechanism.

[0023] Preferably, the number of the chambers is k, and the number of the first through grooves formed is And the k chambers and the first through grooves are annularly arrayed based on the axis of the outer tube. There are filter materials attached to the partition member. The filter materials are filled in the chambers at intervals based on the partition member. In this way, the partition member with the filter materials forms two optional gas flow paths based on the outer tube. The flow guiding member is installed on the flow path of the soot from the interior of the filter cartridge to its air inlet.

[0024] Preferably, the outer tube is hermetically connected to the interior of the filter cartridge based on its non-grooved part, and an air hole six communicating with the air inlet on the filter cartridge is formed at one end of the outer tube far from the pulse jet mechanism.

[0025] Preferably, the partition member is formed as a hollow structure based on its axis, and the spray pipe is located inside the partition member. The spray pipe is also rotatably and fixedly installed. In this way, the installation space of the flow guiding member can be compressed to the greatest extent, and the integration degree of the whole device can be improved.

[0026] Preferably, a movable sleeve and a fixed sleeve are arranged at one end of the outer tube where the pulse air flow is allowed to enter. The fixed sleeve is fixed to the outside, and the movable sleeve is movably fixed between the fixed sleeve and the outer tube for controlling the pulse air flow to selectively enter the outer tube or the spray pipe.

[0027] Preferably, at one end of the outer tube where the pulse air flow is allowed to enter, an air hole one corresponding to the first through groove in position and quantity is formed. A first sealing plug corresponding to the air hole one in position, quantity and structure is arranged on the movable sleeve. An air hole four communicating with the air hole one is also formed in the movable sleeve. A second sealing plug corresponding to the air hole four in position, quantity and structure is arranged on the fixed sleeve. The movable sleeve and the fixed sleeve are in dynamic sealing connection, and the fixed sleeve is communicated with the pulse jet mechanism.

[0028] Preferably, an air hole five is formed in the movable sleeve, and an air hole three and an air hole two are respectively formed in the partition member and the spray pipe. When the air hole five is communicated with the air hole three and the air hole two, the air hole one is in a non-conductive state.

[0029] Preferably, the first sealing plug and the second sealing plug are integrally formed by a movable sleeve and a fixed sleeve, or are fixedly connected thereto respectively.

[0030] Preferably, the first sealing plug is provided with an arc surface on its windward side to ensure the smooth flow of gas to the greatest extent.

[0031] Preferably, a flame retardant net is provided on the protective member. The flame retardant net can be stored in the protective member. When the flame retardant net is fully unfolded, the protective member and the flame retardant net provide a full - package protection for the filter cartridge.

[0032] Preferably, the flame retardant net is any one well - known and conceivable by those skilled in the art, such as a ceramic dense mesh net. A receiving cavity matching the structure of the flame retardant net is provided on the protective member. The flame retardant net is rotatably and fixedly connected to the bin or the filter cartridge. By providing the flame retardant net, the high - temperature molten slag carried by the high - temperature smoke and dust can be effectively blocked.

[0033]

Beneficial effects

[0034] Compared with the prior art, the present invention provides a negative - pressure smoke and dust collection and purification device for welding, having the following beneficial effects:

[0035] In this negative - pressure smoke and dust collection and purification device for welding, by providing a protective member between the filter cartridges, when the protective member separates the adjacent sides of the filter cartridges, after starting the pulse jet mechanism to jet - clean the filter cartridges, the dust jetted between the filter cartridges will not interfere with each other. Especially for horizontal or obliquely inserted filter cartridges, it blocks the dust blown off from all the filter cartridges above. On the one hand, it forms an independent dust - cleaning area, effectively avoiding the secondary adhesion of dust to the filter cartridges caused by dust diffusion. And when the protective member is located below the filter cartridges, it can play the role of dust collection, so that during the jet - cleaning process, the filter cartridges can be selectively cleaned, rather than cleaning all the filter cartridges at once;

[0036] On the other hand, when the protective member is located above the filter cartridges and the opening faces downward, water is sprayed on the outside of the protective member. The water flows along the outer wall of the protective member to form a water curtain on the flow path of the smoke and dust from the intake pipe to the filter cartridges, thereby pre - treating the difficult - to - handle smoke and dust such as high - temperature, high - humidity, and high - viscosity smoke and dust, avoiding such smoke and dust directly contacting the filter cartridges and causing damage to the filter cartridges or being difficult to clean subsequently. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the overall structure of a negative - pressure smoke and dust collection and purification device for welding according to the present invention.

[0038] Figure 2 It is an anatomical diagram of the structure of a negative - pressure smoke and dust collection and purification device for welding according to the present invention.

[0039] Figure 3 This is a partial structural schematic diagram of a negative-pressure fume collection and purification device for welding according to the present invention.

[0040] Figure 4 This is a structural schematic diagram of a protective member as a preferred embodiment in a negative-pressure fume collection and purification device for welding according to the present invention.

[0041] Figure 5 This is a structural schematic diagram of a filter cartridge in a negative-pressure fume collection and purification device for welding according to the present invention.

[0042] Figure 6 This is a structural schematic diagram of a flow guide member for a filter cartridge in a negative-pressure fume collection and purification device for welding according to the present invention.

[0043] Figure 7 This is a disassembled view of the structure of a flow guide member in a negative-pressure fume collection and purification device for welding according to the present invention.

[0044] Figure 8 This is a disassembled view of the structure of an outer tube for a flow guide member in a negative-pressure fume collection and purification device for welding according to the present invention.

[0045] Figure 9 This is an anatomical view of the structure of a flow guide member in a negative-pressure fume collection and purification device for welding according to the present invention.

[0046] Figure 10 This is a schematic diagram showing the state change of a flow guide member in a negative-pressure fume collection and purification device for welding according to the present invention Figure One 。

[0047] Figure 11 This is a schematic diagram showing the state change of a flow guide member in a negative-pressure fume collection and purification device for welding according to the present invention Figure Two 。

[0048] In the figure:

[0049] 1, bin; 2, intake pipe; 3, outlet pipe; 4, filter cartridge; 5, protective member; 6, water-passing member;

[0050] 41, intake port; 42, flow guide member;

[0051] 421, outer tube; 422, injection tube; 423, partition member;

[0052] 4211, first through groove; 4212, first air hole; 4213, movable sleeve; 4214, fixed sleeve; 4215, sixth air hole;

[0053] 42131, first sealing plug; 42132, fourth air hole; 42133, fifth air hole;

[0054] 42141, Intake chamber; 42142, Second sealing plug

[0055] 4221, Second through groove; 4222, Second air hole

[0056] 4231, Third through groove; 4232, Third air hole; 4233, Filter material; 4234, Rotating rod

[0057] 51, Accommodating cavity; 52, Flame retardant net Detailed implementation mode

[0058] To make the technical means, creative features, achieved purposes and functional effects of the present invention easy to understand, the following will further elaborate on the present invention in combination with the attached drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0059]

Embodiment 1

[0060] To address the deficiencies of the prior art, as Figures 1 - 5 shown, the present invention provides a negative pressure fume collection and purification device for welding, including a chamber 1. An intake pipe 2 and an outlet pipe 3 are connected to the chamber 1. At least two filter cartridges 4 are arranged inside the chamber 1. It also includes a pulse jet mechanism. Inside the chamber 1, there is a protective member 5 corresponding in number to the filter cartridges 4 for shielding the filter cartridges 4. The protective member 5 is erected between the filter cartridges 4 and is rotatably and fixedly installed.

[0061] The intake pipe 2 is fixedly connected to the upper part of the chamber 1 and is in communication with it. The outlet pipe 3 is also fixedly connected to the chamber 1 and is in communication with the filter cartridges 4. The filter cartridges 4 are detachably connected to the chamber 1.

[0062] The protective member 5 is rotatably and fixedly installed on the chamber 1 or can also be rotatably and fixedly installed on the filter cartridges 4.

[0063] An inspection door allowing dust to be taken out is provided on the chamber 1.

[0064] Among them, the position erection of the filter cartridges 4 includes any one of the erection methods such as horizontal, inclined insertion and vertical, and the position erection of the filter cartridges 4 is not limited.

[0065] Those skilled in the art can understand that the pulse jet mechanism includes an air bag and an electromagnetic valve, and the structure therebetween can be erected with reference to the prior art and will not be elaborated here too much.

[0066] Before welding, the intake pipe 2 is aligned with the soot generation site. During welding, a blower connected to the exhaust pipe 3 is started. The blower drives the air flow to generate negative pressure, so that the soot generated by welding is inhaled into the interior of the bin 1 through the intake pipe 2, and then filtered through the filter cartridge 4. The filtered gas is discharged by the blower of the exhaust pipe 3 or further processed.

[0067] It should be noted that during the process of collecting and purifying the soot generated by welding, after the soot is filtered by the filter cartridge 4, it remains between the filter cartridge 4 and the bin 1, that is, on the outer wall of the filter cartridge 4 and inside the bin 1. After a certain collection and purification cycle, when the filter cartridge 4 needs to be blown and cleaned, it is necessary to rotate the protective part 5 to separate the filter cartridge 4 from the filter cartridge 4, as Figure 2 shown in the structural state. In this state, the external pulse blowing mechanism is started to blow the filter cartridge 4. The dust after blowing will directly fall on the outer wall of the protective part 5, and will not fall on another filter cartridge 4 located below this filter cartridge 4, and will fall from the outer wall of the protective part 5;

[0068] And when blowing is carried out in the state where the protective part 5 is in the state with the opposite structural state as Figure 2 shown, it will also not fall on another filter cartridge 4 located below this filter cartridge 4. The dust will fall into the inner side of the protective part 5 for collection. In this way, the protective part 5 corresponding to a single filter cartridge 4 can be pulled out for separate cleaning. For example:

[0069] In a certain implementation scenario, based on this embodiment, since the filter cartridge 4 located above is adjacent to the intake pipe 2, it means that the dust remaining on the surface of the filter cartridge 4 located above is more than that of the filter cartridge 4 located below it. Therefore, it is not necessary to clean all the filter cartridges 4 synchronously, and only targeted cleaning is required.

[0070] It is worth mentioning that by arranging the protective part 5 between the filter cartridges 4, when the protective part 5 separates the adjacent sides of the filter cartridges 4, after starting the pulse blowing mechanism to blow and clean the filter cartridges 4, the blown dust between the filter cartridges 4 will not interfere with each other. Especially for the filter cartridges 4 such as horizontal or inclined insertion types, it blocks the dust blown off from all the filter cartridges 4 located above the filter cartridge 4, forming an independent dust cleaning area, which can effectively avoid the secondary adhesion of the filter cartridges 4 caused by dust diffusion. And when the protective part 5 is located below the filter cartridge 4, it can play a role in collecting dust. In this way, during the process of blowing and cleaning, it is possible to selectively clean the filter cartridges 4, rather than cleaning all the filter cartridges 4 at one time.

[0071] As a preferred implementation method, as Figure 3 、 4As shown in the figure, a flame-retardant net 52 is provided on the protective member 5. The flame-retardant net 52 can be stored in the protective member 5. When the flame-retardant net 52 is fully unfolded, the protective member 5 and the flame-retardant net 52 provide a full-wrap protection for the filter cartridge 4.

[0072] Among them, the flame-retardant net 52 is any kind of flame-retardant net well-known and conceivable to those skilled in the art, such as a ceramic dense mesh net. A receiving cavity 51 that fits the structure of the flame-retardant net 52 is provided on the protective member 5. The flame-retardant net 52 is rotatably fixedly connected to the bin 1 or the filter cartridge 4. By providing the flame-retardant net 52, the high-temperature molten slag carried by the high-temperature soot can be effectively blocked.

[0073]

Embodiment 2

[0074] Considering that it is difficult to handle high-temperature soot generated by welding high-melting-point metals such as aluminum and copper, and high-humidity and high-viscosity soot containing oil and water. If such soot directly contacts the filter cartridge 4, it may damage the filter material of the filter cartridge 4 and reduce the service life of the filter cartridge 4. Therefore, based on the above Embodiment 1, this embodiment is proposed:

[0075] Specifically, as Figure 2 shown, in a negative-pressure soot collection and purification device for welding, the installation of the filter cartridge 4 is based on the fact that its axis is perpendicular to the intake direction of the soot. The protective member 5 is configured as a non-full-wrap structure based on the filter cartridge 4, and the opening is made based on covering at least more than half of the outer surface area of the filter cartridge 4. The opening of the filter cartridge 4 faces downward. In this way, during the subsequent formation of the water curtain, it can be ensured to the greatest extent that the water will not wet the filter cartridge 4 during the flow process. And when the protective member 5 is in a semi-cylindrical structure, as Figure 2 shown in the structural state, due to its arc surface structure, the water curtain flows more smoothly along the arc surface of the protective member 5;

[0076] A water-passing member 6 is arranged inside the bin 1 for spraying water towards the protective member 5. The water flows through the surface of the protective member 5 to form a water curtain on the flow path of the soot from the intake pipe 2 to the filter cartridge 4;

[0077] The water-passing member 6 is a water-passing member such as a water pipe with a nozzle, etc., externally connected to a water supply mechanism. The water supply mechanism includes a water pump and pipe fittings, and an external water source;

[0078] The main body of the water-passing member 6 is fixed on the bin 1, and its water outlet part is exactly opposite to the central part of the protective member 5. In this way, the amount of water flowing to both sides of the filter cartridge 4 is kept consistent to the greatest extent.

[0079] It should be noted that the present invention is a negative pressure fume collection and purification device for welding. During the process of treating difficult-to-treat fumes such as the above-mentioned high-temperature fumes, high-humidity fumes, and high-viscosity fumes, in order to prevent the fumes from directly contacting the filter cartridge 4 and causing damage to the filter cartridge 4 during the collection and purification process, it is necessary to start the external water supply mechanism and supply water to the inside of the bin 1 through the water passage member 6. The structural state of the protective member 5 is as Figure 2 shown. In this state, water flows from the water passage member 6 to the uppermost protective member 5, and then continues to flow along the outer wall of the protective member 5 to the outer walls of the remaining protective members 5, forming a water curtain on the flow path of the fumes from the intake pipe 2 to the filter cartridge 4. In this structural state, the fumes need to pass through the water curtain for filtration before passing through the filter cartridge 4 for filtration.

[0080] It is worth mentioning that when the protective member 5 is located above the filter cartridge 4 and opens downward, spraying water on the outside of the protective member 5 causes the water to flow along the outer wall of the protective member 5 to form a water curtain on the flow path of the fumes from the intake pipe 2 to the filter cartridge 4. In this way, pretreatment can be carried out on difficult-to-treat fumes such as high temperature, high humidity, and high viscosity, avoiding such fumes directly contacting the filter cartridge 4 and causing damage to the filter cartridge 4 or being difficult to clean subsequently.

[0081]

Embodiment III

[0082] Based on any of the above embodiments, when there is a lot of dust remaining on the outer wall of the filter cartridge 4 to be cleaned, since the pulse jet cleaning directly blows the inside of the filter cartridge 4 and the flow path of the blowing gas inside the filter cartridge 4 is irregular, resulting in different cleaning effects on each part of the filter cartridge 4, for this reason, this embodiment is proposed:

[0083] Specifically, as Figure 6 shown, a filter cartridge 4 for a negative pressure fume collection and purification device for welding is provided with a flow guiding member 42 inside the filter cartridge 4, which is connected to the pulse jet mechanism and is used for uniformly guiding or unidirectionally guiding the blowing air flow generated by the pulse jet mechanism.

[0084] Furthermore, as Figures 7 - 8 shown, a flow guiding member 42 for a negative pressure fume collection and purification device for welding, the flow guiding member 42 includes an outer pipe 421, the outer pipe 421 is connected to the pulse jet mechanism, and a partition member 423 is also rotatably and fixedly installed inside the outer pipe 421. The inside of the outer pipe 421 is divided into at least two chambers based on the partition member 423, and a first through groove 4211 with a number not more than the number of chambers is opened on the outer pipe 421;

[0085] The outer tube 421 is fixedly connected to the filter cartridge 4 or the bin 1. The partition member 423 includes a rod, and a number of partitions are distributed on the outer wall of the rod. Based on these partitions, the interior of the outer tube 421 is compartmentalized. To facilitate the rotational control of the partition member 423, the rod thereon extends from the interior of the outer tube 421 through to its exterior.

[0086] It should be noted that the present invention is a negative pressure fume collection and purification device for welding. During the process of blowing and cleaning the filter cartridge 4 by means of the provided flow guiding member 42, the blowing air flow directly enters the interior of the outer tube 421. Inside the outer tube 421, the flow guiding path of the air flow is partitioned by the partition member 423, such that the blowing air flow is evenly divided based on the number of the provided through slots 4211 and then ejected onto the inner wall of the filter cartridge 4 to achieve uniform blowing.

[0087] It is worth mentioning that by equally dividing the blowing air flow by the partition member 423, the wrinkled area of the filter cartridge can be covered to the greatest extent, so as to compensate for the pressure gradient caused by the height difference of the filter cartridge 4 and avoid inconsistent dust cleaning intensities between the top side and the bottom side of the filter cartridge 4.

[0088]

Embodiment Four

[0089] Based on the above Embodiment Three, for the filter cartridge 4 such as the horizontal or inclined insertion type shown in the above embodiment, after pulse blowing and cleaning, due to the self-weight factor of the dust, the dust located on the lower half surface of the filter cartridge 4 is relatively easy to fall after blowing, while the dust located on the upper half surface of the filter cartridge 4 may partially remain above. Therefore, this embodiment is proposed:

[0090] Furthermore, as shown in Figures 7 - 8 a flow guiding member 42 for a negative pressure fume collection and purification device for welding, the flow guiding member 42 further includes a spray pipe 422, and a through slot 4221 is provided on the spray pipe 422. The spray pipe 422 is also connected to the pulse blowing mechanism.

[0091] It should be noted that the present invention is a negative pressure fume collection and purification device for welding. By means of the provided flow guiding member 42, if targeted blowing is required for the upper part of the filter cartridge 4, at this time, the spray pipe 422 is supplied with air, and the blowing air flow is ejected through the through slot 4221 on the spray pipe 422. Since the through slot 4221 is directly opposite to the upper part of the filter cartridge 4, the blowing air flow is ejected through the provided through slot 4221 to achieve targeted blowing.

[0092] Among them, in this embodiment, it is not limited to only the embodiment of blowing the upper part of the filter cartridge 4. For example, when the intake pipe 2 is arranged beside the filter cartridge 4, more dust will accumulate beside the filter cartridge 4 operating in this structural state, resulting in the need to perform targeted blowing on the side of the filter cartridge 4 during the cleaning process of the filter cartridge 4. Therefore, it is possible to rotate the injection pipe 422 so that the second through groove 4221 opened on the injection pipe 422 is directly opposite to the side of the filter cartridge 4 to achieve the effect of targeted blowing.

[0093] It is worth mentioning that directional blowing can be achieved through the injection pipe 422. Optionally, during the process of blowing and cleaning the filter cartridge 4, the blowing air flow can accurately impact the upper pleated area of the filter cartridge 4, only requiring local high-pressure air flow, which saves about 15% - 25% energy compared to traditional full-filter cartridge blowing.

[0094] As a preferred embodiment, the partition 423 is hollow-structured based on its axis, and the injection pipe 422 is located inside the partition 423. The injection pipe 422 is also rotatably fixedly installed; when the injection pipe 422 is located inside the partition 423, since the injection pipe 422 and the partition 423 are coaxially installed, in order to exert the normal effect of the injection pipe 422, a third through groove 4231 is opened on the partition 423 corresponding to the position of the second through groove 4221.

[0095]

Embodiment Five

[0096] Based on the above Embodiment Four, in the above embodiment, at least two embodiments of blowing and cleaning the filter cartridge 4 are proposed. Because it is necessary to supply air to the outer pipe 421 and the injection pipe 422 separately and specifically, the required air supply method is cumbersome, and the pipeline erected in this required state is more redundant. In order to facilitate the air supply control of the outer pipe 421 and the injection pipe 422, this embodiment is proposed:

[0097] Specifically, as Figures 7 - 10 shown, a flow guide member 42 for a negative pressure dust collection and purification device for welding is provided with a movable sleeve 4213 and a fixed sleeve 4214 at one end of the outer pipe 421 where pulsed air flow is allowed to enter. The fixed sleeve 4214 is fixed to the outside, and the movable sleeve 4213 is movably fixed between the fixed sleeve 4214 and the outer pipe 421 for controlling the pulsed air flow to selectively enter the outer pipe 421 or the injection pipe 422.

[0098] Further, on one end of the outer tube 421 that allows pulsed air flow to enter, there are air holes 4212 corresponding in position and quantity to the first through slots 4211. On the movable sleeve 4213, there is a first sealing plug 42131 corresponding in position and quantity to the air holes 4212 and fitting in structure with them. Also, on the movable sleeve 4213, there is an air hole four 42132 communicating with the air holes 4212. On the fixed sleeve 4214, there is a second sealing plug 42142 corresponding in position and quantity to the air hole four 42132 and fitting in structure with it. And the movable sleeve 4213 is in a dynamic sealing connection with the fixed sleeve 4214, and the fixed sleeve 4214 is connected to the pulsed jetting mechanism;

[0099] On the movable sleeve 4213, there is an air hole five 42133. And on the partition member 423 and the injection tube 422, there are respectively an air hole three 4232 and an air hole two 4222. When the air hole five 42133 is in communication with the air hole three 4232 and the air hole two 4222, the air hole one 4212 is in a non-conducting state;

[0100] The first sealing plug 42131 and the second sealing plug 42142 are integrally formed with the movable sleeve 4213 and the fixed sleeve 4214 respectively, or are fixedly connected to them respectively.

[0101] Among them, the first sealing plug 42131 has an arc surface on its windward side to ensure the smoothness of gas flow to the greatest extent.

[0102] It should be noted that the present invention is a negative pressure fume collection and purification device for welding. Through the provided flow guiding member 42, for different jetting and cleaning requirements, it is divided into targeted jetting and cleaning and non-targeted jetting and cleaning. Before jetting, the air supply path of the pulsed air flow is changed by moving the movable sleeve 4213:

[0103] When performing targeted jetting and cleaning, as in the structural state shown in Figure 9 、 10 , it is necessary to move the movable sleeve 4213 until the first sealing plug 42131 on it engages with the air hole one 4212 on the outer tube 421, and block the air hole one 4212 through the first sealing plug 42131. At the same time, when the first sealing plug 42131 on the movable sleeve 4213 engages with the air hole one 4212, the second sealing plug 42142 on the fixed sleeve 4214 also engages with the air hole four 42132 on the movable sleeve 4213, and block the air hole four 42132 on the movable sleeve 4213 through the second sealing plug 42142. And the air hole five 42133 on the movable sleeve 4213 is simultaneously in communication with the air hole three 4232 on the rotating rod 4234 and the air hole two 4222 on the injection tube 422. In this structural state, the pulsed air flow can only enter the interior of the injection tube 422 through the air hole five 42133, the air hole three 4232 and the air hole two 4222, and then be ejected through the second through slot 4221 to achieve targeted jetting and cleaning;

[0104] When performing non-targeted jet cleaning, just like Figure 9 , 10 the structural state shown, it is necessary to move the movable sleeve 4213 to a state where the sealing plug 1-42131 thereon is non-engaged with the air hole 1-4212 on the outer tube 421. At the same time, when the sealing plug 1-42131 is in a non-engaged state with the air hole 1-4212, the sealing plug 2-42142 is also in a non-engaged state with the air hole 4-42132. And at this time, the air hole 5-42133 on the movable sleeve 4213 is in a non-connected state with the air hole 3-4232 opened on the partition member 423. Therefore, the pulsed air flow enters through the air inlet chamber 42141 on the fixed sleeve 4214, and then enters the inside of the outer tube 421 through the air hole 1-4212 on the outer tube 421, realizing non-targeted jet cleaning.

[0105] It is worth mentioning that by moving the movable sleeve 4213 to different positions between the outer tube 421 and the injection tube 422, the flow path of the pulsed air flow is changed, so that the outer tube 421 and the injection tube 422 can share a pipeline, without the need to erect additional pipelines and separate control systems, and the operation method is more convenient and efficient.

[0106]

Example Six

[0107] Based on the above Examples Three to Five, considering harmful gases such as CO, NO2, HF, VOC S etc. generated by the combustion or decomposition of welding materials such as rosin and flux, the filter cartridge 4 alone cannot effectively filter such harmful gases, and often secondary adsorption and purification filtration are required after filtration through the filter cartridge. Based on this, in order to improve the applicability of the device, this example is proposed:

[0108] Specifically, as Figure 8 shown, a flow guide member 42 for a negative pressure fume collection and purification device for welding has k chambers, and the number of the first through grooves 4211 opened is and the k chambers and the first through grooves 4211 are annularly arranged based on the axis of the outer tube 421. There are filter materials 4233 attached to the partition member 423, the filter materials 4233 are filled in the chambers at intervals based on the partition member 423. In this way, the partition member 423 with the filter materials 4233 forms two optional gas flow paths based on the outer tube 421, and the flow guide member 42 is installed on the flow path of the fume from the inside of the filter cartridge 4 to its air inlet.

[0109] The outer tube 421 is hermetically connected to the inside of the filter cartridge 4 based on its non-grooved part, and an air hole 6-4215 communicating with the air inlet 41 on the filter cartridge 4 is opened at one end of the outer tube 421 far from the pulse jet mechanism.

[0110] It should be noted that the present invention is a negative pressure fume collection and purification device for welding. Through the provided flow guiding member 42, for the welding fume with harmful gases, it is necessary to rotate the separating member 423 so that the filter material 4233 attached to the separating member 423 is opposite to the first through groove 4211 on the outer tube 421. In this way, during the process of collecting and purifying the welding fume, the welding fume first passes through the filter cartridge 4, then through the first through groove 4211, is effectively adsorbed and filtered by the filter material 4233, and then passes through the sixth air hole 4215 opened on the outer tube 421 and is discharged through the air outlet pipe 3.

[0111] It is worth mentioning that by providing the filter material 4233 on the separating member 423, the flow guiding member 42 not only plays the role of evenly distributing the air flow, but when the filter material 4233 is on the inevitable path of the fume flow, it can filter the harmful gases in the welding fume and improve the applicability of the device.

[0112] In the present invention, regarding fixation, fixed connection, fixed installation, etc., those skilled in the art can understand the simplest fixation methods such as using bolts for fixation, and other types of fixation methods can also be used;

[0113] Regarding movement, etc., those skilled in the art can understand the simplest movement method as manual movement, and other types such as movement driven by telescopic driving members such as electric push rods, hydraulic cylinders, and air cylinders can also be used;

[0114] Regarding rotation, etc., those skilled in the art can understand the simplest rotation method as manual rotation, and other types such as rotation driven by rotation driving members such as motors or combinations of motors + speed reducers can also be used;

[0115] Regarding the position features that are not limited, those skilled in the art can understand that it can be installed inside the bin 1, or outside the bin 1, or installed in a dynamic sealing manner by penetrating from the inside of the bin 1 to its outside;

[0116] The above connection relationship features and position relationship features are not further limited in the present invention, and can be equivalently replaced in any way well-known and conceivable to those skilled in the art.

[0117] The above has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A negative pressure dust collection and purification device for welding, comprising a bin (1), an air inlet pipe (2) and an air outlet pipe (3) are connected to the bin (1), and at least two filter cartridges (4) are arranged inside the bin (1), and further comprising a pulse jet mechanism, characterized in that: Inside the bin (1), there is a protective member (5) whose quantity corresponds to that of the filter cartridge (4) and which is used to shield the filter cartridge (4). The protective member (5) is installed between the filter cartridges (4) in a rotatable and fixed manner.

2. The negative pressure dust collection and purification device for welding according to claim 1, characterized in that: The installation of the filter cartridge (4) is based on the fact that its axis is perpendicular to the intake direction of the soot. The protective member (5) is designed as a non-full-coverage structure based on the filter cartridge (4), and the opening is made to shield at least more than half of the outer surface area of the filter cartridge (4). The opening of the filter cartridge (4) faces downward. Inside the bin (1), there is a water passage member (6) for spraying water towards the protective member (5). The water flows on the surface of the protective member (5) to form a water curtain on the flow path of the soot from the intake pipe (2) to the filter cartridge (4).

3. The negative pressure fume collection and purification device for welding according to claim 1, characterized in that: Inside the filter cartridge (4), there is a flow guiding member (42) which is connected to the pulse jetting mechanism and is used to uniformly guide or unidirectionally guide the jetting air flow generated by the pulse jetting mechanism.

4. A negative pressure fume collection and purification device for welding according to claim 3, characterized in that: The flow guiding member (42) includes an outer pipe (421) which is connected to the pulse jetting mechanism. Inside the outer pipe (421), there is a partition member (423) which is also installed in a rotatable and fixed manner. The inside of the outer pipe (421) is divided into at least two chambers based on the partition member (423), and there are not more than the number of chambers of through slots one (4211) opened on the outer pipe (421).

5. The negative pressure fume collection and purification device for welding according to claim 4, characterized in that: The flow guiding member (42) further includes a jetting pipe (422) on which there are through slots two (4221), and the jetting pipe (422) is also connected to the pulse jetting mechanism.

6. The negative pressure fume collection and purification device for welding according to claim 4, characterized in that: The number of the chambers is k, and the number of the first through grooves (4211) opened is and the k chambers and the first through grooves (4211) are annularly arrayed based on the axis of the outer tube (421). A filter medium (4233) is attached to the partition member (423), and the filter media (4233) are filled in the chambers at intervals based on the partition member (423). The flow guide member (42) is installed on the flow path of the soot from the inside of the filter cartridge (4) to its air inlet.

7. The negative pressure fume collection and purification device for welding according to claim 5, characterized in that: The partition member (423) is designed as a hollow structure based on its axis, and the jetting pipe (422) is located inside the partition member (423) and is also installed in a rotatable and fixed manner.

8. The negative pressure fume collection and purification device for welding according to claim 5, wherein: At one end of the outer pipe (421) where the pulse air flow is allowed to enter, there is a movable sleeve (4213) and a fixed sleeve (4214). The fixed sleeve (4214) is fixed to the outside, and the movable sleeve (4213) is movably fixed between the fixed sleeve (4214) and the outer pipe (421) for controlling the pulse air flow to selectively enter the outer pipe (421) or the jetting pipe (422).

9. A negative pressure fume collection and purification device for welding according to claim 8, characterized in that: At one end of the outer pipe (421) where the pulse air flow is allowed to enter, there are air holes one (4212) whose positions and quantities correspond to those of the through slots one (4211). On the movable sleeve (4213), there is a sealing plug one (42131) whose positions and quantities correspond to those of the air holes one (4212) and which is structurally fitted to them. Also, on the movable sleeve (4213), there are air holes four (42132) connected to the air holes one (4212). On the fixed sleeve (4214), there is a sealing plug two (42142) whose positions and quantities correspond to those of the air holes four (42132) and which is structurally fitted to them. And the movable sleeve (4213) is connected to the fixed sleeve (4214) in a dynamic sealing manner, and the fixed sleeve (4214) is connected to the pulse jetting mechanism. An air hole five (42133) is formed in the movable sleeve (4213), and an air hole three (4232) and an air hole two (4222) are respectively formed in the partition member (423) and the injection pipe (422). When the air hole five (42133) is communicated with the air hole three (4232) and the air hole two (4222), the air hole one (4212) is in a non-conductive state.

10. A negative pressure fume collection and purification device for welding according to claim 1, characterized in that: A flame retardant net (52) is provided on the protective member (5). The flame retardant net (52) can be stored in the protective member (5). When the flame retardant net (52) is fully unfolded, the protective member (5) and the flame retardant net (52) provide full protection for the filter cartridge (4).

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