A gas filtering device

Abstract

The present invention relates to the technical field of gas filter devices, and proposes a gas filter device, including a main body with an air inlet cavity, a connecting port and an exhaust cavity, wherein the air inlet cavity is connected to the exhaust cavity through the connecting port; a filter cartridge is arranged in the exhaust cavity, and a cover is arranged at the connecting port; a cover body is detachably arranged on the main body, and is used to expose the filter cartridge to the outside world after the cover body is disassembled; a blocking member 1 is movably arranged in the air inlet cavity, and the connecting port is blocked or unblocked after the blocking member 1 is moved; a blocking member 2 is movably arranged on the inner wall of the main body, located in the exhaust cavity, and sleeved on the filter cartridge, and the blocking member 2 disconnects the exhaust cavity from the outside world, and after the blocking member 2 is moved, it is used to discharge the gas around the filter cartridge away from the filter cartridge. Through the above technical scheme, the problem that the T-type filter device in the prior art is small and inconvenient to replace the filter element, and there is still residual gas near the filter element during replacement, which may cause safety accidents is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of gas filtering devices, and in particular to a gas filtering device. Background Art

[0002] A gas filter is a device used to purify gas. Its main function is to remove impurities, dust and other harmful substances in the gas to ensure the quality and safety of the gas. It is usually composed of a shell, a filter element, and inlet and outlet connections. The shell is generally made of metal or high-strength plastic, with sufficient strength and sealing to withstand the pressure of the gas and prevent leakage. The filter element is the core component of the filter device. Its material and structure determine the filtering effect. Common filter element materials include stainless steel mesh, paper, fiber, etc., which can effectively filter particulate impurities and dust of different sizes.

[0003] Its main types include cartridge filter devices, basket filter devices and T-type filter devices. For occasions with more pipeline connection structures such as chemical plants, T-type filter devices are used more frequently because they have the characteristics of small size and low resistance, and are more suitable for occasions with limited pipeline installation space.

[0004] At present, the filter element in the gas filtering device needs to be replaced from time to time. During the replacement of the filter element, the gas remaining near the filter element is easy to diffuse into the surrounding environment during the disassembly and assembly process, posing a great safety hazard. At the same time, it is even more inconvenient to disassemble and replace the small T-type filter device. Summary of the invention

[0005] The present invention provides a gas filtering device, which solves the problem in the related art that the T-type filtering device is small and inconvenient to replace the filter element, and gas still remains near the filter element during replacement, which may cause safety accidents.

[0006] The technical solution of the present invention is as follows:

[0007] A gas filtering device, comprising:

[0008] A main body, wherein the main body has an air inlet cavity, a communication port and an exhaust cavity, and the air inlet cavity is connected to the exhaust cavity through the communication port;

[0009] A filter cartridge, the filter cartridge being disposed in the exhaust cavity and at the communication port;

[0010] A cover body, wherein the cover body is detachably arranged on the main body, and the cover body is used to expose the filter cartridge to the outside after being removed;

[0011] A blocking member 1, wherein the blocking member 1 is rotatably disposed in the air inlet cavity, and the blocking member 1 blocks or cancels the blocking of the communication port after moving;

[0012] The second sealing member is movably arranged on the inner wall of the main body, located in the exhaust cavity, and sleeved on the filter cartridge. After the second sealing member moves, it is used to discharge the gas around the filter cartridge away from the filter cartridge.

[0013] As a further technical solution, there are a plurality of communication ports, and the plurality of communication ports are arranged along the circumference of the filter cartridge.

[0014] As a further technical solution, there is a supporting wall between two adjacent connecting ports, and the sealing member has a plurality of sealing plates, which are arranged along the circumference of the filter cartridge, and the sealing plates abut against the inner wall of the supporting wall. After the sealing member is rotated, the sealing plates seal or unseal the connecting port.

[0015] As a further technical solution, the supporting wall and the sealing plate are both arc-shaped, the width of the sealing plate is greater than the width of the connecting port, and the sealing plate also has a scraping portion, which is located in the connecting port and abuts against the inner wall of the filter cartridge. When the sealing member rotates, the scraping portion is used to scrape the inner wall of the filter cartridge.

[0016] As a further technical solution, the cross section of the blocking plate is T-shaped, and the scraping portion and the side wall of the supporting wall form a cleaning gap.

[0017] As a further technical solution, the air inlet cavity is L-shaped, the blocking member 1 further has a connecting plate, the connecting plate is located at the top of the air inlet cavity, a plurality of the blocking plates are fixedly connected to the bottom of the connecting plate, and a plurality of the blocking plates are arranged along the circumference of the connecting plate, the bottom of the scraper abuts against the main body, and further includes:

[0018] A driving knob passes through the cover body and is rotatably connected to the cover body, and the driving knob is detachably connected to the connecting disk.

[0019] As a further technical solution, the exhaust cavity is L-shaped, the second sealing member is annular, the inner wall of the second sealing member abuts against the outer wall of the filter cartridge, and the outer wall of the second sealing member abuts against the inner wall of the main body.

[0020] As a further technical solution, the filter cartridge is a high-strength alloy filter, and the bottom of the exhaust chamber has a slag discharge port, which is located directly below the filter cartridge. After the second sealing member moves closer to or away from the slag discharge port, it is used to scrape impurities on the outer wall of the filter cartridge toward the slag discharge port.

[0021] As a further technical solution, the second blocking member has a rod portion, the rod portion passes through the cover body, and the length of the rod portion is greater than the length of the filter cartridge.

[0022] As a further technical solution, the main body is T-shaped, and the cover body is detachably arranged on the top of the main body by fasteners.

[0023] The working principle and beneficial effects of the present invention are:

[0024] In the present invention, in order to avoid disassembling the filter cartridge and emitting residual gas near the filter cartridge in the main body, two groups of movable plugging parts are installed in the main body. The first plugging part is used to block the connection between the air inlet chamber and the exhaust chamber to avoid the residual gas from flowing in again, and the second plugging part is used to discharge the gas around the filter cartridge away from the filter cartridge. Both of them have good mobile sealing performance to prevent gas leakage. After the two have removed the residual gas around the filter cartridge covered at the connecting port for filtering, the bolt fasteners on the cover body can be removed, so as to remove it from one end of the T-shaped main body, and then the filter cartridge exposed to the outside can be directly pulled out for replacement, and then the cover body is installed by the bolt fasteners, and then the two groups of plugging parts are moved and reset to ensure that the filter cartridge functions normally and the connectivity of the entire gas channel is ensured, thereby completing the maintenance operation of the gas filtering device.

[0025] Specifically, an L-shaped air intake column is welded inside the T-shaped main body made of high-strength metal. The L-shaped air intake column extends into the top of the T-shaped main body. The interior of the L-shaped air intake column is an L-shaped air intake cavity. An exhaust cavity is formed between the outer wall of the L-shaped air intake column and the inner wall of the T-shaped main body. The air intake cavity and the exhaust cavity are connected through a connecting port opened at the upper part of the L-shaped air intake column. The L-shaped air intake column can also provide a stable limiting support for the cylindrical filter cartridge. When the gas in the air intake cavity passes through the connecting port, it needs to be filtered by the filter cartridge, so that impurities such as dust are retained at the connecting port. on the inner wall of the filter cartridge; based on the above structure, it is necessary to set the second set of sealing parts on the filter cartridge and move on the inner wall of the T-shaped main body to ensure good mobile sealing, and discharge all residual gas around the filter cartridge from the filter cartridge as much as possible after its movement; and the sealing part one moving in the air inlet chamber can use the simplest valve structure, and the driving component can move to block the connecting port, and in order to ensure the sealing sealing, the area of ​​the blocking part of the sealing plate can be designed to be larger than the connecting port, and the specific connecting port and the sealing part one can be rectangular or the like.

[0026] The above-mentioned gas filtering device solves the problem of residual gas near the filter cartridge during replacement, which may cause safety accidents. Furthermore, for the T-shaped filtering devices on pipelines in various narrow areas of chemical plants, the filter cartridges can be replaced quickly and safely, which can effectively improve the gas quality, protect gas equipment, and ensure the safe operation of the gas system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0028] Figure 1 This is a schematic diagram of the structure of a gas filtering device in the present invention;

[0029] Figure 2 This is a schematic diagram of the internal structure of a gas filtering device in the present invention;

[0030] Figure 3 It is a schematic diagram of the internal structure of the air intake cavity in the present invention;

[0031] Figure 4 It is a schematic diagram of the supporting wall structure in the present invention;

[0032] Figure 5 This is a structural schematic diagram of a blocking member in the present invention;

[0033] Figure 6 For the present invention Figure 2 Enlarged view of part A in the middle;

[0034] Figure 7 This is a schematic diagram of the filter cartridge disassembly state of the present invention;

[0035] Figure 8 This is a schematic diagram of the state before the connecting port of the present invention is blocked;

[0036] Fig. 9 This is a schematic diagram of the structure of the present invention after the communication port is blocked;

[0037] Fig.10 For the present invention Figure 8 Enlarged view of middle part B;

[0038] Fig.11 For the present invention Fig. 9 Enlarged view of part C in the middle.

[0039] In the figure: 1. main body, 101. air inlet chamber, 102. connecting port, 103. exhaust chamber, 104. supporting wall, 105. slag discharge port, 2. filter cartridge, 3. cover body, 4. sealing part 1, 401. sealing plate, 402. scraper, 403. cleaning gap, 404. connecting plate, 5. sealing part 2, 501. rod, 6. driving knob. DETAILED DESCRIPTION

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0041] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0042] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0044] Reference Figure 1 to Figure 11 , which is the first embodiment of the present invention, a gas filtering device is proposed, comprising: a main body 1, the main body 1 having an air inlet cavity 101, a connecting port 102 and an exhaust cavity 103, the air inlet cavity 101 being connected to the exhaust cavity 103 through the connecting port 102; a filter cartridge 2, the filter cartridge 2 being arranged in the exhaust cavity 103 and being arranged at the connecting port 102; a cover body 3, the cover body 3 being detachably arranged on the main body 1, and being used to expose the filter cartridge 2 to the outside after the cover body 3 is disassembled; a blocking member 4, the blocking member 4 being rotatably arranged in the air inlet cavity 101, and blocking or canceling the blocking of the connecting port 102 after the blocking member 4 is moved; a blocking member 2 5, the blocking member 2 5 being movably arranged on the inner wall of the main body 1, being located in the exhaust cavity 103, and being sleeved on the filter cartridge 2, and being used to discharge the gas around the filter cartridge 2 away from the filter cartridge 2 after the blocking member 2 5 is moved.

[0045] In this embodiment, Figure 1 , 2As shown, in order to avoid disassembling the filter cartridge 2 and emitting residual gas near the filter cartridge 2 in the main body 1, two sets of movable plugging parts are installed in the main body 1. The plugging part 1 4 is moved to block the connection between the air inlet chamber 101 and the exhaust chamber 103 to prevent the residual gas from flowing in again, and the plugging part 2 5 is moved to discharge the gas around the filter cartridge 2 away from the filter cartridge 2. Both have good mobile sealing properties to prevent gas leakage. After the two have removed the residual gas around the filter cartridge 2 covered at the connecting port 102 for filtering, the bolt fasteners on the cover body 3 can be removed, thereby removing it from one end of the T-shaped main body 1, and then the filter cartridge 2 exposed to the outside can be directly pulled out for replacement, and then the cover body 3 is installed by the bolt fasteners, and the two sets of plugging parts are moved and reset to ensure that the filter cartridge 2 functions normally and the connectivity of the entire gas channel is ensured, thereby completing the maintenance operation of the gas filtering device.

[0046] Specifically, Figure 2 As shown, an L-shaped air intake column is welded inside the T-shaped main body 1 made of high-strength metal, and the L-shaped air intake column extends into the top of the T-shaped main body 1. The interior of the L-shaped air intake column is an L-shaped air intake cavity 101, and an exhaust cavity 103 is formed between the outer wall of the L-shaped air intake column and the inner wall of the T-shaped main body 1. The air intake cavity 101 and the exhaust cavity 103 are connected through a connecting port 102 opened at the upper part of the L-shaped air intake column. The L-shaped air intake column can also provide a stable limiting support for the cylindrical filter cartridge 2. When the gas in the air intake cavity 101 passes through the connecting port 102, it needs to be filtered by the filter cartridge 2, and then impurities such as dust are retained in the connecting port 10 2 on the inner wall of the filter cartridge 2; based on the above structure, it is necessary to sleeve the sealing member 5 on the filter cartridge 2 and move on the inner wall of the T-shaped main body 1 to ensure good mobile sealing, and after it moves, all the residual gas around the filter cartridge 2 is discharged from the filter cartridge 2 as much as possible; and the sealing member 4 moving in the air inlet chamber 101 can use the simplest valve structure, and the driving component can move to block the connecting port 102, and in order to ensure the sealing sealing, the area of ​​the blocking part of the sealing plate 401 can be designed to be larger than the connecting port 102, and the specific connecting port 102 and the sealing member 4 can be rectangular or the like.

[0047] The above-mentioned gas filtering device solves the problem of residual gas near the filter cartridge 2 during replacement, which may cause safety accidents. Furthermore, for the T-shaped filtering devices on the pipelines in various narrow areas of the chemical plant, the filter cartridge 2 can be replaced quickly and safely, which can effectively improve the gas quality, protect the gas equipment, and ensure the safe operation of the gas system.

[0048] Furthermore, there are a plurality of communication ports 102 , and the plurality of communication ports 102 are arranged along the circumference of the filter cartridge 2 .

[0049] In this embodiment, Figure 2-4As shown, in order to ensure the normal connectivity of the entire gas channel and the use effect, and at the same time adapt to the properties of the connecting port 102 on the L-shaped air intake column, so that the gas can be quickly filtered through the filter cartridge 2 at each connecting port 102, quickly filtered and discharged from the exhaust chamber 103, the L-shaped air intake column is designed to have a plurality of connecting ports 102 arranged along the circumference thereof.

[0050] Further consideration is given to quickly block several groups of connecting ports 102 when the blocking member 4 moves, simplify the overall structure and reduce the subsequent maintenance cost. Therefore, the movement form of the blocking member 4 is limited to rotation. It can be designed as a structure similar to a fan blade. By rotating a certain angle, the overall blocking can be achieved, which greatly simplifies the overall structure.

[0051] Furthermore, there is a support wall 104 between two adjacent connecting ports 102, and the sealing member 4 has a plurality of sealing plates 401, which are arranged along the circumference of the filter cartridge 2, and the sealing plates 401 abut against the inner wall of the support wall 104. After the sealing member 4 rotates, the sealing plates 401 block or unblock the connecting port 102.

[0052] In this embodiment, Figure 3-5 As shown in Figures 9 and 11, the fan blade structure of the blocking member 4 is further designed, on which a plurality of circumferentially arranged blocking plates 401 are welded, and their rotation axis is coaxial with the axis of one side of the L-shaped air intake column, to ensure that after the blocking member 4 rotates a certain angle, each blocking plate 401 blocks each connecting port 102; and when the connecting port 102 is open, the blocking plate 401 is attached to the inner wall of the supporting wall 104 between two adjacent connecting ports 102, which can provide a certain guiding effect for the movement of the blocking plate 401.

[0053] Furthermore, the support wall 104 and the sealing plate 401 are both arc-shaped, the width of the sealing plate 401 is greater than the width of the connecting port 102, and the sealing plate 401 also has a scraping portion 402, which is located in the connecting port 102 and abuts against the inner wall of the filter cartridge 2. After the sealing member 4 rotates, the scraping portion 402 is used to scrape the inner wall of the filter cartridge 2.

[0054] In this embodiment, Figure 2 , 5 As shown in , 6, 8-11, since the L-shaped air intake column has a plurality of connecting openings 102 arranged along the circumference thereof, the supporting wall 104 and the sealing plate 401 are both arc-shaped to ensure that the above functions can be realized, and the width of the sealing plate 401 is greater than the width of the connecting opening 102 to ensure that the sealing plate 401 fully blocks the connecting opening 102 after the sealing member 4 is rotated to a certain angle.

[0055] Generally speaking, paper filter elements need to be replaced regularly, while washable filter elements such as stainless steel wire mesh can be reused after cleaning. Most filter cartridges 2 in the form of wire mesh or the like are used. During operation, only the portion corresponding to the connecting port 102 will play a filtering role. Therefore, it is necessary to regularly change the working angle of the filter cartridge 2 to maximize the utilization of the filter cartridge 2. On the basis of the structure of installing two sets of plugging parts, the work safety of removing the cover body 3 and changing the working angle of the filter cartridge 2 is greatly improved, and it is also more convenient. In order to increase the service life of the filter cartridge 2, it is necessary to deal with dust and other particulate impurities on the inner wall of the wire mesh filter cartridge 2. Therefore, a scraper 402 is welded on the plugging plate 401. When the working angle of the filter cartridge 2 is changed and the plugging plate 401 needs to be rotated multiple times, the scraper 402 located at the connecting port 102 and abutting against the inner wall of the filter cartridge 2 can scrape the inner wall of the filter cartridge 2, thereby playing a certain cleaning role. The scraped impurities will fall to the bottom of the connecting port 102 and will not affect the rest of the working process.

[0056] Furthermore, the cross section of the blocking plate 401 is T-shaped, and the scraping portion 402 and the side wall of the supporting wall 104 form a cleaning gap 403 .

[0057] In this embodiment, Figure 7-11 As shown, when the working angle of the filter cartridge 2 is adjusted multiple times until the filter cartridge 2 needs to be replaced, a certain amount of dust and other particulate impurities will accumulate at the bottom of the connecting port 102. At this time, the scraper portion 402 is designed to form a cleaning gap 403 with the side wall of the support wall 104, that is, the accumulated dust and other particulate impurities are located in the cleaning gap 403. Before installing the new filter cartridge 2, the dust and other particulate impurities in the cleaning gap 403 can be manually wiped off. Prior cleaning greatly improves the service life of the entire device and avoids the need for regular cleaning. The action of the scraper portion 402 and the width of the sealing plate 401 are also utilized. The scraper portion 402 does not reciprocate and abut against the side walls of the two adjacent support walls 104, ensuring that the cleaning gap 403 can be successfully exposed to the outside world after the filter cartridge 2 is removed, which is convenient for cleaning.

[0058] Furthermore, the air inlet cavity 101 is L-shaped, and the sealing member 4 also has a connecting disk 404, which is located at the top of the air inlet cavity 101, and a plurality of sealing plates 401 are fixedly connected to the bottom of the connecting disk 404, and a plurality of sealing plates 401 are arranged in a circle around the connecting disk 404, and the bottom of the scraper 402 abuts against the main body 1, and also includes: a driving knob 6, which passes through the cover body 3 and is rotatably connected to the cover body 3, and the driving knob 6 is detachably connected to the connecting disk 404.

[0059] In this embodiment, Figure 1-5As shown in Figures 7, in order to facilitate the driving of the sealing member 4 inside the air inlet chamber 101 to rotate and avoid safety accidents caused by the built-in motor, and the sealing member 4 only needs to rotate a certain angle to ensure the blocking of the connecting port 102, the sealing member 4 is further designed to have a connecting disk 404 for connecting a plurality of sealing plates 401, and the plurality of sealing plates 401 are welded to the bottom of the connecting disk 404 along the circumference, and the connecting disk 404 is located at the top of the air inlet chamber 101, so that it can pass through the L-shaped air inlet column and the cover body 3, and is connected to the driving knob 6 through structures such as special-shaped blocks, so that the driving knob 6 can drive the connecting disk 404 to rotate under the action of external force to block the connecting port 102.

[0060] The bottom of the scraper portion 402 is designed to abut the main body 1, that is, the bottom of the connecting port 102, so that the main body 1 can provide stable support for the sealing member 4 from all sides to prevent it from being suspended in the L-shaped air intake column. The cover body 3 can be removed only after the connection between the driving knob 6 and the connecting disk 404 is disconnected. As a result, the connecting disk 404 will not be suspended on the top of the air intake cavity 101, but will be stably supported by the main body 1. Therefore, the driving knob 6 and the connecting disk 404 are designed to be detachably connected, which can be achieved in the form of special-shaped blocks or raised grooves.

[0061] Furthermore, the exhaust chamber 103 is L-shaped, the blocking member 2 5 is annular, the inner wall of the blocking member 2 5 abuts against the outer wall of the filter cartridge 2 , and the outer wall of the blocking member 2 5 abuts against the inner wall of the main body 1 .

[0062] In this embodiment, Figure 2 , 7 -9, in order to ensure that after the sealing member 25 moves, the residual gas around the filter cartridge 2 is discharged and the seal is good without leakage, the sealing member 25 is designed to be annular, the inner wall of the sealing member 25 abuts against the outer wall of the filter cartridge 2, and the outer wall of the sealing member 25 abuts against the inner wall of the main body 1, a sealing ring can be added, and on this basis, a slide groove can be opened on the inner wall of the main body 1, and the outer wall of the annular sealing member 25 is welded with a sliding part corresponding to the slide groove to improve the movement stability of the sealing member 25.

[0063] Furthermore, the filter cartridge 2 is a high-strength alloy filter, and a slag discharge port 105 is provided at the bottom of the exhaust chamber 103 . The slag discharge port 105 is located directly below the filter cartridge 2 . After the sealing member 5 moves closer to or away from the slag discharge port 105 , it is used to scrape impurities on the outer wall of the filter cartridge 2 toward the slag discharge port 105 .

[0064] In this embodiment, Figure 6-11As shown, due to the use of a filter cartridge 2 with a rigid structure of a wire mesh, when the scraper 402 is in action, since the binding force between the dust and other impurities on the inner wall and the inner wall is weak, the scraping force of the scraper 402 is large and the direction is appropriate, the scraper 402 may squeeze a portion of the dust and other impurities on the inner wall toward the outer wall, and the impurities on the inner wall cannot be completely scraped off by the scraper 402 into the cleaning area, then the dust and other impurities squeezed toward the outer wall can be caused to fall off when the subsequent sealing member 25 moves along the outer wall of the filter cartridge 2, and it is necessary to collect and process this part of the impurities located in the exhaust chamber 103, so a slag discharge port 105 is opened at the bottom of the exhaust chamber 103, and it is designed to be directly below the filter cartridge 2, so that all the impurities processed by the sealing member 25 can be collected, and when the entire gas system is out of use, the valve at the slag discharge port 105 can be opened for cleaning.

[0065] Therefore, in order to improve the effect of scraping the inner wall of the filter cartridge 2 with a rigid structure of the wire mesh to squeeze impurities toward the outer wall, the filter cartridge 2 is designed to be a high-strength alloy filter mesh, which can maintain a better shape and rigidity when scraping and enhance the scraping force.

[0066] Furthermore, the second blocking member 5 has a rod portion 501 , which passes through the cover body 3 , and the length of the rod portion 501 is greater than the length of the filter cartridge 2 .

[0067] In this embodiment, Figure 2 , 7 -11, in order to facilitate driving the annular sealing member 25 to move along the outer wall of the filter cartridge 2 inside the exhaust chamber 103 and avoid safety accidents caused by the built-in motor, the simplest structure is adopted, which is similar to the driving knob 6. Two rods 501 that penetrate the cover body 3 are symmetrically welded directly on it, and it is ensured that the length of the rod 501 is greater than the length of the filter cartridge 2. Before removing the cover body 3, the displacement of the sealing member 25 driven by external force is greater than the length of the filter cartridge 2, so that the gas around the filter cartridge 2 is discharged from the filter cartridge 2.

[0068] Furthermore, the main body 1 is T-shaped, and the cover 3 is detachably arranged on the top of the main body 1 by means of fasteners.

[0069] In this embodiment, Figure 1 As shown, the cover body 3 is detachably mounted on one end of the T-shaped main body 1 by means of fasteners such as bolts, thereby simplifying the structure.

[0070] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A gas filtering device, characterized in that: include: A main body (1), the main body (1) comprising an air intake chamber (101), a communication port (102) and an air exhaust chamber (103), the air intake chamber (101) being connected to the air exhaust chamber (103) via the communication port (102); A filter cartridge (2), the filter cartridge (2) being arranged in the exhaust cavity (103) and at the communication port (102); a cover body (3), the cover body (3) being detachably arranged on the main body (1), and being used to expose the filter cartridge (2) to the outside after the cover body (3) is disassembled; A blocking member 1 (4), the blocking member 1 (4) being rotatably disposed in the air inlet cavity (101), and the blocking member 1 (4) blocks or unblocks the communication port (102) after moving; A second blocking member (5), the second blocking member (5) being movably arranged on the inner wall of the main body (1), being located in the exhaust cavity (103), and being sleeved on the filter cartridge (2); after the second blocking member (5) moves, it is used to discharge the gas around the filter cartridge (2) away from the filter cartridge (2); There are a plurality of the communication openings (102), and the plurality of the communication openings (102) are arranged along the circumference of the filter cartridge (2); A support wall (104) is provided between two adjacent communication ports (102); the blocking member 1 (4) has a plurality of blocking plates (401); the plurality of blocking plates (401) are arranged along the circumference of the filter cartridge (2), and the blocking plates (401) abut against the inner wall of the support wall (104); after the blocking member 1 (4) rotates, the blocking plates (401) block or unblock the communication ports (102); The supporting wall (104) and the blocking plate (401) are both arc-shaped; the width of the blocking plate (401) is greater than the width of the connecting port (102); the blocking plate (401) further comprises a scraping portion (402); the scraping portion (402) is located in the connecting port (102) and abuts against the inner wall of the filter cartridge (2); after the blocking member (4) is rotated, the scraping portion (402) is used to scrape the inner wall of the filter cartridge (2).

2. A gas filtering device according to claim 1, characterized in that: The blocking plate (401) has a T-shaped cross section, and the scraping portion (402) and the side wall of the supporting wall (104) form a cleaning gap (403).

3. A gas filtering device according to claim 1, characterized in that: The air inlet cavity (101) is L-shaped, the blocking member (4) further comprises a connecting plate (404), the connecting plate (404) is located at the top of the air inlet cavity (101), a plurality of the blocking plates (401) are fixedly connected to the bottom of the connecting plate (404), and the plurality of the blocking plates (401) are arranged along the circumference of the connecting plate (404), the bottom of the scraping portion (402) abuts against the main body (1), and further comprises: A driving knob (6), the driving knob (6) passes through the cover body (3) and is rotatably connected to the cover body (3), and the driving knob (6) is detachably connected to the connecting disk (404).

4. A gas filtering device according to claim 1, characterized in that: The exhaust chamber (103) is L-shaped, the second sealing member (5) is annular, the inner wall of the second sealing member (5) abuts against the outer wall of the filter cartridge (2), and the outer wall of the second sealing member (5) abuts against the inner wall of the main body (1).

5. A gas filtering device according to claim 4, characterized in that: The filter cartridge (2) is a high-strength alloy filter screen. The exhaust chamber (103) has a slag discharge port (105) at the bottom. The slag discharge port (105) is located directly below the filter cartridge (2). The second plugging member (5) moves closer to or farther from the slag discharge port (105) to scrape impurities on the outer wall of the filter cartridge (2) toward the slag discharge port (105).

6. A gas filtering device according to claim 4, characterized in that: The second sealing member (5) has a rod portion (501), the rod portion (501) passes through the cover body (3), and the length of the rod portion (501) is greater than the length of the filter cartridge (2).

7. A gas filtering device according to claim 1, characterized in that: The main body (1) is T-shaped, and the cover body (3) is detachably arranged on the top of the main body (1) via a fastener.

Images