Laboratory waste gas filtering device

Abstract

The utility model discloses a laboratory waste gas filtering device. The laboratory waste gas filtering device comprises a filtering mechanism and a dismounting mechanism, the filtering mechanism comprises a negative pressure fan, an air inlet of the negative pressure fan communicates with an air inlet pipe, and an activated carbon filter screen is detachably connected into an inner cavity of the air inlet pipe; the dismounting and mounting mechanism comprises a fixed ring body which is fixedly connected to the activated carbon filter screen in a sleeving manner, and two positioning through holes are formed in the fixed ring body; according to the laboratory waste gas filtering device, the dismounting and mounting mechanism is arranged on the filtering mechanism, so that after a fixed ring body and an activated carbon filter screen are inserted into a gas inlet pipe, an insertion rod can penetrate through a positioning through hole, and a positioning block body can abut the fixed ring body against a supporting block body under the action of a limiting spring, so that the activated carbon filter screen is conveniently mounted; the disassembly is also convenient; through the arrangement, the activated carbon filter screen has the function of being conveniently disassembled and assembled on the filter device so as to be conveniently cleaned and replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of laboratory waste gas treatment, in particular to a laboratory waste gas filtering device. Background Art

[0002] As we all know, waste gas refers to harmful and toxic gases discharged by humans in the process of production and life. These harmful and toxic gases will seriously pollute the environment and cause harm to human health when discharged without treatment; the existing technology usually uses activated carbon filtration method when filtering laboratory waste gas. The principle is to use activated carbon filter to adsorb harmful impurities in the waste gas. However, the existing activated carbon filter will have mesh clogging after long-term use, thereby affecting the adsorption effect. The activated carbon filter in the prior art does not have the function of convenient disassembly and assembly on the waste gas filter device for easy replacement; for this reason, we propose a laboratory waste gas filter device.

[0003] The above information disclosed in the Background section is only for enhancement of understanding of the background of the present disclosure and therefore it may include information that does not constitute the prior art that is already known to one of ordinary skill in the art. Utility Model Content

[0004] The purpose of the utility model is to provide a laboratory waste gas filtering device to solve the problems raised in the above background technology.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a laboratory waste gas filtering device, comprising: a filtering mechanism and a disassembly mechanism;

[0006] The filtering mechanism comprises a negative pressure fan, the air inlet of the negative pressure fan is connected to an air inlet pipe, and an activated carbon filter is detachably connected to the inner cavity of the air inlet pipe;

[0007] The disassembly and assembly mechanism includes a fixed ring body fixedly connected and sleeved on the activated carbon filter, the fixed ring body is provided with two positioning through holes inside, and a plug rod is inserted into the two positioning through holes, one end of the plug rod is fixedly connected to a support block, and the support block is fixedly connected to the inner wall of the intake pipe, a groove is provided inside the plug rod, and the positioning block is movably connected inside the groove, one side of the positioning block is fixedly connected to a limit spring, and one end of the limit spring is fixedly connected to the inner wall of the groove.

[0008] By adopting the above technical scheme, after the negative pressure fan is started, the exhaust gas inside the laboratory can enter the air inlet pipe, and the activated carbon filter can adsorb harmful impurities in the exhaust gas; when the activated carbon filter needs to be disassembled and assembled for cleaning or replacement, the two positioning blocks can be pressed into the groove at the same time to make the fixed ring lose its fixing force, so that the activated carbon filter can be pulled out of the air inlet pipe; when the activated carbon filter needs to be installed, the activated carbon filter and the fixed ring can be inserted into the inner cavity of the air inlet pipe first, so that the two insertion rods can pass through the positioning through holes; when the fixed ring is tightly attached to the supporting block, the positioning block can be moved out of the groove under the resetting action of the limit spring and the fixed ring can be pressed against the supporting block, so that the activated carbon filter can be firmly installed in the inner cavity of the air inlet pipe.

[0009] Preferably, one end of the air intake pipe is fixedly connected to an air intake scoop, and one side of the air intake scoop is communicated with the air intake pipe.

[0010] By adopting the above technical solution, the air intake range of the air intake pipe can be easily expanded.

[0011] Preferably, the air outlet of the negative pressure fan is connected to an exhaust pipe.

[0012] By adopting the above technical solution, the filtered exhaust gas can be easily discharged.

[0013] Preferably, a first sealing ring is fixedly mounted on the fixed ring body, and the first sealing ring is tightly attached to the inner wall of the air inlet pipe.

[0014] By adopting the above technical solution, it is possible to prevent the exhaust gas from flowing into the interior of the intake pipe through the gap between the fixed ring body and the intake pipe.

[0015] Preferably, a pull ear is fixedly connected to one side of the fixing ring body.

[0016] By adopting the above technical solution, the activated carbon filter can be easily pulled out of the air inlet pipe.

[0017] Preferably, a second sealing ring is fixedly embedded in the inner wall of the positioning through hole, and the second sealing ring is tightly attached to the outer wall of the insertion rod.

[0018] By adopting the above technical solution, it is possible to prevent the exhaust gas from flowing into the interior of the air intake pipe through the gap between the positioning through hole and the insertion rod.

[0019] Preferably, a sliding groove is provided on the inner side wall of the groove, and the positioning block is slidably connected to the inner side wall of the sliding groove.

[0020] By adopting the above technical solution, the stability of the positioning block during movement can be improved.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] This laboratory exhaust gas filtering device is provided with a disassembly and assembly mechanism on the filtering mechanism, so that after the fixed ring body and the activated carbon filter are inserted into the air inlet pipe, the insertion rod can pass through the positioning through hole, and the positioning block can press the fixed ring body against the supporting block under the action of the limit spring, so as to facilitate the installation of the activated carbon filter and also facilitate disassembly; through the above arrangement, the activated carbon filter has the function of convenient disassembly and assembly on the filtering device, thereby facilitating cleaning and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of the laboratory waste gas filtering device of the utility model;

[0024] Figure 2 It is an enlarged schematic diagram of area A of the structural schematic diagram of the laboratory waste gas filtration device of the utility model;

[0025] Figure 3 It is a structural schematic diagram of the air intake pipe and the air intake hopper in the laboratory waste gas filtering device of the utility model;

[0026] Figure 4 It is an enlarged schematic diagram of area B of the schematic diagram of the structure of the air intake pipe and the air intake hopper in the laboratory waste gas filtering device of the utility model;

[0027] Figure 5 It is a structural schematic diagram of a fixed ring body and a positioning through hole in a laboratory waste gas filtering device of the utility model.

[0028] In the figure: 1. Filter mechanism; 10. Negative pressure fan; 11. Inlet pipe; 12. Inlet hopper; 13. Exhaust pipe; 14. Activated carbon filter; 2. Disassembly and assembly mechanism; 20. Fixed ring; 21. Positioning through hole; 22. Insert rod; 23. Groove; 24. Limit spring; 25. Positioning block; 26. Pull ear; 27. First sealing ring; 28. Second sealing ring; 29. ​​Support block. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] See also Figure 1-Figure 5 , the utility model provides a technical solution: a laboratory waste gas filtering device, comprising: a filtering mechanism 1 and a disassembly mechanism 2;

[0031] First, in order to allow the waste gas inside the laboratory to enter the air inlet pipe 11 after the negative pressure fan 10 is started, the activated carbon filter 14 can adsorb harmful impurities in the waste gas; the filtering mechanism 1 includes a negative pressure fan 10, the air inlet of the negative pressure fan 10 is connected to the air inlet pipe 11, and the activated carbon filter 14 is detachably connected to the inner cavity of the air inlet pipe 11; in order to facilitate the expansion of the air intake range of the air inlet pipe 11, one end of the air inlet pipe 11 is fixedly connected to the air inlet hopper 12, and one side of the air inlet hopper 12 is connected to the air inlet pipe 11; in order to facilitate the discharge of the filtered waste gas, the air outlet of the negative pressure fan 10 is connected to the exhaust pipe 13;

[0032] Secondly, in order to disassemble and assemble the activated carbon filter 14 in order to clean or replace the activated carbon filter 14, the two positioning blocks 25 can be pressed into the groove 23 at the same time to make the fixing ring 20 lose its fixing force, so that the activated carbon filter 14 can be pulled out of the air intake pipe 11. When the activated carbon filter 14 needs to be installed, the activated carbon filter 14 and the fixing ring 20 can be inserted into the inner cavity of the air intake pipe 11 first, so that the two insertion rods 22 can pass through the positioning through holes 21. When the fixing ring 20 is tightly attached to the supporting block 29, the positioning block 25 can be moved out of the groove 23 under the resetting action of the limit spring 24 and the fixing ring 20 can be pressed against the supporting block 29. Tightly on the support block 29, so that the activated carbon filter 14 can be firmly installed in the inner cavity of the intake pipe 11; the disassembly and assembly mechanism 2 includes a fixed ring body 20 fixedly connected and sleeved on the activated carbon filter 14, and the interior of the fixed ring body 20 is provided with two positioning through holes 21, and the interiors of the two positioning through holes 21 are inserted with plug rods 22, and one end of the plug rod 22 is fixedly connected to the support block 29, and the support block 29 is fixedly connected to the inner wall of the intake pipe 11, and the interior of the plug rod 22 is provided with a groove 23, and the interior of the groove 23 is movably connected with a positioning block 25, and one side of the positioning block 25 is fixedly connected to a limit spring 24, and one end of the limit spring 24 is fixedly connected to the inner wall of the groove 23;

[0033] Again, in order to prevent exhaust gas from flowing into the interior of the intake pipe 11 from the gap between the fixed ring body 20 and the intake pipe 11, a first sealing ring 27 is fixedly mounted on the fixed ring body 20, and the first sealing ring 27 is tightly attached to the inner wall of the intake pipe 11; in order to facilitate the extraction of the activated carbon filter 14 out of the intake pipe 11, a pull ear 26 is fixedly connected to one side of the fixed ring body 20; in order to prevent exhaust gas from flowing into the interior of the intake pipe 11 from the gap between the positioning through hole 21 and the insertion rod 22, a second sealing ring 28 is fixedly embedded in the inner wall of the positioning through hole 21, and the second sealing ring 28 is tightly attached to the outer wall of the insertion rod 22; in order to improve the stability of the positioning block 25 during movement, a slide groove is provided on the inner wall of the groove 23, and the positioning block 25 is slidably connected to the inner wall of the slide groove.

[0034] According to the above technical solution, the working steps of this solution are summarized and sorted out: when in use, the negative pressure fan 10 is first started to allow the exhaust gas inside the laboratory to enter the air inlet pipe 11, and the activated carbon filter 14 can adsorb harmful impurities in the exhaust gas; when the activated carbon filter 14 needs to be disassembled and assembled to facilitate cleaning or replacement of the activated carbon filter 14, the fixing ring body 20 can lose its fixing force by pressing the two positioning blocks 25 into the groove 23 at the same time, so that the activated carbon filter 14 can be removed from the air inlet pipe 11. The activated carbon filter 14 is pulled out from the air intake pipe 11. When the activated carbon filter 14 needs to be installed, the activated carbon filter 14 and the fixed ring body 20 can be inserted into the inner cavity of the air intake pipe 11 first, so that the two insertion rods 22 can pass through the positioning through holes 21. When the fixed ring body 20 is tightly attached to the supporting block body 29, the positioning block body 25 can be moved out of the groove 23 under the resetting action of the limit spring 24 and press the fixed ring body 20 against the supporting block body 29, so that the activated carbon filter 14 can be firmly installed in the inner cavity of the air intake pipe 11.

[0035] In summary: this laboratory exhaust gas filtering device is provided with a disassembly and assembly mechanism 2 on the filtering mechanism 1, so that after the fixed ring body 20 and the activated carbon filter 14 are inserted into the air inlet pipe 11, the insertion rod 22 can penetrate the positioning through hole 21, and the positioning block 25 can press the fixed ring body 20 against the supporting block 29 under the action of the limit spring 24, so as to facilitate the installation of the activated carbon filter 14 and also facilitate disassembly; through the above settings, the activated carbon filter 14 has the function of convenient disassembly and assembly on the filtering device, thereby facilitating cleaning and replacement.

[0036] Parts not involved in the present invention are the same as the prior art or can be implemented by the prior art. Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A laboratory waste gas filtration device, characterized in that: include: Filtering mechanism (1) and disassembling mechanism (2); The filtering mechanism (1) comprises a negative pressure fan (10), the air inlet of the negative pressure fan (10) is connected to an air inlet pipe (11), and an activated carbon filter (14) is detachably connected to the inner cavity of the air inlet pipe (11); The disassembly and assembly mechanism (2) comprises a fixed ring body (20) fixedly connected and sleeved on the activated carbon filter (14); the fixed ring body (20) is provided with two positioning through holes (21); a plug rod (22) is inserted into the two positioning through holes (21); one end of the plug rod (22) is fixedly connected to a support block (29); the support block (29) is fixedly connected to the inner wall of the intake pipe (11); a groove (23) is provided inside the plug rod (22); a positioning block (25) is movably connected inside the groove (23); one side of the positioning block (25) is fixedly connected to a limit spring (24); one end of the limit spring (24) is fixedly connected to the inner wall of the groove (23).

2. A laboratory waste gas filtration device according to claim 1, characterized in that: One end of the air intake pipe (11) is fixedly connected to an air intake scoop (12), and one side of the air intake scoop (12) is in communication with the air intake pipe (11).

3. A laboratory waste gas filtration device according to claim 1, characterized in that: The air outlet of the negative pressure fan (10) is connected to an exhaust pipe (13).

4. A laboratory waste gas filtration device according to claim 1, characterized in that: A first sealing ring (27) is fixedly sleeved on the fixed ring body (20), and the first sealing ring (27) is tightly attached to the inner wall of the air intake pipe (11).

5. A laboratory waste gas filtration device according to claim 4, characterized in that: A pull ear (26) is fixedly connected to one side of the fixed ring body (20).

6. A laboratory waste gas filtration device according to claim 1, characterized in that: A second sealing ring (28) is fixedly embedded in the inner wall of the positioning through hole (21), and the second sealing ring (28) is tightly attached to the outer wall of the insertion rod (22).

7. A laboratory waste gas filtration device according to claim 1, characterized in that: The inner side wall of the groove (23) is provided with a sliding groove, and the positioning block (25) is slidably connected to the inner side wall of the sliding groove.

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