Waste gas treatment device for laboratory fume hood

Abstract

The utility model discloses a waste gas treatment device for a laboratory fume hood, which comprises a treatment box and a gas inlet pipe fixed on the top surface of the treatment box, the non-return assembly comprises a fixing pipe, an air inlet groove, a circular groove and a penetrating groove, the fixing pipe fixedly penetrates through the outer surface of the air inlet pipe, the air inlet groove is formed in one side of the fixing pipe, the circular groove is formed in the middle of the fixing pipe, the penetrating groove is formed in the other side of the fixing pipe, and the diameter of the air inlet groove and the diameter of the penetrating groove are smaller than that of the circular groove; the diameter of the air inlet groove is larger than that of the penetrating groove, a blocking block is fixed to one end of the connecting pipe and extends into the penetrating groove, a first spring is fixed into the circular groove, a connecting pipe is fixed to one end of the first spring, and an air hole is formed in the outer surface of the connecting pipe. The waste gas treatment box has the advantages that the backflow of waste gas is effectively prevented, and the waste gas can only flow in one direction, so that the waste gas treatment efficiency and safety are improved, and the service life of the treatment box is prolonged.

Description

Technical Field

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

[0002] The exhaust gas treatment device for laboratory fume hoods is a supporting equipment for exhaust gas treatment operations. When conducting experiments in the laboratory, a certain amount of exhaust gas will be generated. Direct discharge of the exhaust gas will pollute the environment and needs to be treated.

[0003] After searching, Chinese patent authorization announcement number CN218191621U discloses an exhaust gas treatment device for a laboratory fume hood, including a treatment box, wherein a particle adsorption sponge layer and a nano-adsorption strip are fixedly connected to the inner wall of the treatment box near the top. The utility model uses the mutual coordination between the I-shaped plate, the rotating shaft, the movable plate, the driving gear, the rotating rod, the rotating handle, the driven bevel gear, the driving bevel gear and the fixed shaft components, so that the exhaust gas treatment device for the laboratory fume hood can drive the I-shaped plate to move up and down reciprocatingly when the two driving gears rotate in different directions, thereby driving the baffle to move up and down to open or close the exhaust port, so as to perform exhaust work, and at the same time, it can also prevent untreated exhaust gas from overflowing from the inner cavity of the treatment box and being discharged into the air, thereby improving the opening and closing effect of the device and solving the problem that the exhaust port cannot be conveniently opened or closed.

[0004] There is no structure to prevent the backflow of exhaust gas in the above-mentioned treatment box. The backflow of exhaust gas will increase the burden of the treatment equipment. Since part of the exhaust gas cannot be effectively discharged, the equipment needs to process more exhaust gas, which will not only increase energy consumption, but also cause the equipment to overload and shorten the service life of the equipment. Therefore, it is necessary to provide a treatment box that can prevent the backflow of exhaust gas to extend the service life of the treatment box. Utility Model Content

[0005] The purpose of the utility model is to provide an exhaust gas treatment device for a laboratory fume hood to solve the problem raised in the above-mentioned background technology that the exhaust gas in the above-mentioned treatment box has no structure to prevent backflow, and the backflow of exhaust gas will increase the burden of the treatment equipment. Since part of the exhaust gas cannot be effectively discharged, the equipment needs to process more exhaust gas, which will not only increase energy consumption, but also cause the equipment to overload and shorten the service life of the equipment.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model is an exhaust gas treatment device for a laboratory fume hood, comprising:

[0008] A processing box and an air inlet pipe, wherein the air inlet pipe is fixed on the top surface of the processing box;

[0009] A non-return assembly, the non-return assembly includes a fixed pipe, an air intake groove, a circular groove, and a through groove, the fixed pipe is fixed and penetrates the outer surface of the air intake pipe, the air intake groove is opened on one side of the fixed pipe, the circular groove is opened in the middle of the fixed pipe, and the through groove is opened on the other side of the fixed pipe, and the diameters of the air intake groove and the through groove are smaller than those of the circular groove, and the diameter of the air intake groove is smaller than that of the through groove.

[0010] Furthermore, an air outlet pipe is fixed to one side of the processing box, and a sealing door is hinged to one side of the processing box.

[0011] Furthermore, a first spring is fixed inside the circular groove, a connecting pipe is fixed to one end of the first spring, and an air hole is provided on the outer surface of the connecting pipe.

[0012] Furthermore, a blocking block is fixed to one end of the connecting pipe, and the blocking block extends into the interior of the through groove.

[0013] Furthermore, it also includes a replacement component, which includes a mounting rail, a fixing hole, a particle adsorption sponge layer, and a mounting hole. The mounting rail is fixed on both sides of the inside of the processing box, and the fixing hole is opened at one end of the mounting rail. The particle adsorption sponge layer is slidably installed inside the mounting rail, and the mounting hole is opened on one side of the particle adsorption sponge layer.

[0014] Furthermore, a second spring is fixed inside the mounting hole, a clamping column is fixed to one end of the second spring, a distal end of the clamping column extends into the fixing hole, and a nano adsorption strip is installed at the lower end of the mounting rail.

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] 1. The utility model is provided with a treatment box, an air intake pipe and a non-return assembly. When the exhaust gas enters from the air intake pipe, the exhaust gas will compress the first spring, the first spring drives the connecting pipe to move, and the blocking block is moved out of the through groove. At this time, the exhaust gas flows into the inside of the connecting pipe through the air vent, and the exhaust gas flows into the treatment box through the air intake groove. When the exhaust gas of the treatment box flows back, the exhaust gas flows into the connecting pipe. At this time, the first spring restores its deformation, the connecting pipe moves in the opposite direction, the blocking block is stuck in the through groove, the exhaust gas flows out from the air vent, and is closed in the circular groove. The exhaust gas cannot flow into the through groove, which effectively prevents the exhaust gas from flowing back and ensures that the exhaust gas can only flow in one direction, thereby improving the efficiency and safety of the exhaust gas treatment and extending the service life of the treatment box.

[0017] 2. Based on the first beneficial effect, by setting up the treatment box and the replacement assembly, when the staff opens the sealing door (14), they only need to press the clamping column (36) inwards, and the second spring (35) is compressed into the inside of the mounting hole (34). When the clamping column (36) is withdrawn from the fixing hole (32), the particle adsorption sponge layer (33) can be pulled out from the mounting rail (31) and replaced with the old particle adsorption sponge layer (33). Repeating the above steps can replace the nano adsorption strips (37). The replacement steps are quick and can reduce the dirt and wear accumulated due to long-term use, thereby extending the service life of the entire exhaust gas treatment device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of the utility model from the first perspective;

[0020] Figure 2 This is a cross-sectional view of the anti-return component of the utility model;

[0021] Figure 3 This is a structural cross-sectional view of the anti-return component of the utility model;

[0022] Figure 4 It is a structural diagram of the replacement components of the utility model;

[0023] Figure 5 This is a structural exploded view of the replacement components of the utility model.

[0024] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0025] 11. Processing box; 12. Air inlet pipe; 13. Air outlet pipe; 14. Sealing door;

[0026] 21. fixed pipe; 22. air inlet groove; 23. circular groove; 24. through groove; 25. first spring; 26. connecting pipe; 27. air vent; 28. blocking block;

[0027] 31. Mounting rail; 32. Fixing hole; 33. Particle adsorption sponge layer; 34. Mounting hole; 35. Second spring; 36. Card column; 37. Nano adsorption strip. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation methods disclosed below.

[0030] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general scale, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0031] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] See also Figures 1 to 5 As shown, this embodiment is an exhaust gas treatment device for a laboratory fume hood, comprising:

[0033] A processing box 11 and an air inlet pipe 12, wherein the air inlet pipe 12 is fixed to the top surface of the processing box 11;

[0034] The non-return assembly includes a fixed pipe 21, an air inlet groove 22, a circular groove 23, and a through groove 24. The fixed pipe 21 is fixed and penetrates the outer surface of the air inlet pipe 12. The air inlet groove 22 is provided on one side of the fixed pipe 21. The circular groove 23 is provided in the middle of the fixed pipe 21. The through groove 24 is provided on the other side of the fixed pipe 21. The diameters of the air inlet groove 22 and the through groove 24 are smaller than the circular groove 23. The diameter of the air inlet groove 22 is smaller than the through groove 24.

[0035] The treatment box 11 is the main part of the entire exhaust gas treatment system. The treatment box 11 is used to contain the exhaust gas and perform preliminary treatment. When the exhaust gas enters from the intake pipe 12, it will flow into the connecting pipe 26 through the air vent 27, and then enter the treatment box 11 through the intake groove 22. When the exhaust gas in the treatment box 11 flows back, the first spring 25 restores its deformation and pushes the connecting pipe 26 to move in the opposite direction, thereby blocking the through groove 24 to prevent the exhaust gas from flowing back.

[0036] An air outlet pipe 13 is fixed to one side of the processing box 11, a sealing door 14 is hinged to one side of the processing box 11, a first spring 25 is fixed inside the circular groove 23, a connecting pipe 26 is fixed to one end of the first spring 25, and an air vent 27 is provided on the outer surface of the connecting pipe 26, a blocking block 28 is fixed to one end of the connecting pipe 26, and the blocking block 28 extends into the inside of the through groove 24;

[0037] The first spring 25 is responsible for providing a restoring force so that the connecting pipe 26 can quickly reset and block the through-slot 24 when the exhaust gas flows back. The connecting pipe 26 is connected to the first spring 25 and is pushed to reset by the first spring 25 to block the through-slot 24 when the exhaust gas flows back. The blocking block 28 is a part of the connecting pipe 26, which extends into the through-slot 24. When the first spring 25 recovers its deformation, the blocking block 28 will be stuck in the through-slot 24, thereby preventing the exhaust gas from flowing back.

[0038] Working principle:

[0039] When the exhaust gas enters from the intake pipe 12, the exhaust gas compresses the first spring 25, the first spring 25 drives the connecting pipe 26 to move, and the blocking block 28 moves out of the through groove 24. At this time, the exhaust gas flows into the connecting pipe 26 through the air vent 27, and the exhaust gas flows into the treatment box 11 through the intake groove 22. When the exhaust gas in the treatment box 11 flows back, the exhaust gas flows into the connecting pipe 26. At this time, the first spring 25 recovers its deformation, the connecting pipe 26 moves in the opposite direction, and the blocking block 28 is stuck in the through groove 24. The exhaust gas flows out from the air vent 27 and is closed in the circular groove 23, and the exhaust gas cannot flow into the through groove 24.

[0040] This step effectively prevents the backflow of the exhaust gas and ensures that the exhaust gas can only flow in one direction, thereby improving the efficiency and safety of the exhaust gas treatment and extending the service life of the treatment box 11.

[0041] See also Figures 1 to 5 As shown; this embodiment is based on the above embodiment and also includes:

[0042] A replacement component includes a mounting rail 31, a fixing hole 32, a particle adsorption sponge layer 33, and a mounting hole 34. The mounting rail 31 is fixed on both sides of the processing box 11. The fixing hole 32 is opened at one end of the mounting rail 31. The particle adsorption sponge layer 33 is slidably installed inside the mounting rail 31. The mounting hole 34 is opened at one side of the particle adsorption sponge layer 33. A second spring 35 is fixed inside the mounting hole 34. A clamping column 36 is fixed at one end of the second spring 35. The end of the clamping column 36 extends into the fixing hole 32. A nano adsorption strip 37 is installed at the lower end of the mounting rail 31.

[0043] The mounting rail 31 is a supporting structure for the particle adsorption sponge layer 33 and the nano-adsorption strips 37. The fixing hole 32 is a part of the mounting rail 31 and is used to receive the card column 36 to fix the position of the particle adsorption sponge layer 33 and the nano-adsorption strips 37. The particle adsorption sponge layer 33 can effectively adsorb harmful substances in the exhaust gas. The nano-adsorption strips 37 have higher adsorption capacity and better chemical stability, and can more effectively remove harmful substances in the exhaust gas.

[0044] Working principle:

[0045] When the staff opens the sealing door 14, they only need to press the clamping column 36 inwards, and the second spring 35 is compressed into the mounting hole 34. When the clamping column 36 is withdrawn from the fixing hole 32, the particle adsorption sponge layer 33 can be pulled out from the mounting rail 31, and the old particle adsorption sponge layer 33 can be replaced. Repeat the above steps to replace the nano adsorption strip 37.

[0046] This step, the replacement step is quick, can reduce the dirt and wear accumulated due to long-term use, thereby extending the service life of the entire exhaust gas treatment device.

[0047] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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, it can be an electrical connection, it can be a direct connection, it can be indirectly connected through an intermediate medium, and 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.

[0048] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An exhaust gas treatment device for a laboratory fume hood, characterized in that: include: A processing box (11) and an air intake pipe (12), wherein the air intake pipe (12) is fixed to the top surface of the processing box (11); A non-return assembly, the non-return assembly comprising a fixed pipe (21), an air intake groove (22), a circular groove (23), and a through groove (24), wherein the fixed pipe (21) is fixedly penetrated through the outer surface of the air intake pipe (12), the air intake groove (22) is arranged on one side of the fixed pipe (21), the circular groove (23) is arranged in the middle of the fixed pipe (21), and the through groove (24) is arranged on the other side of the fixed pipe (21), and the diameters of the air intake groove (22) and the through groove (24) are smaller than those of the circular groove (23), and the diameter of the air intake groove (22) is smaller than that of the through groove (24).

2. The waste gas treatment device for a laboratory fume hood according to claim 1, characterized in that: An air outlet pipe (13) is fixed to one side of the processing box (11), and a sealing door (14) is hingedly connected to one side of the processing box (11).

3. The waste gas treatment device for a laboratory fume hood according to claim 1, characterized in that: A first spring (25) is fixed inside the circular groove (23), a connecting pipe (26) is fixed to one end of the first spring (25), and an air hole (27) is provided on the outer surface of the connecting pipe (26).

4. The waste gas treatment device for a laboratory fume hood according to claim 3, characterized in that: A blocking block (28) is fixed to one end of the connecting pipe (26), and the blocking block (28) extends into the interior of the through groove (24).

5. The waste gas treatment device for a laboratory fume hood according to claim 2, characterized in that: The invention also comprises a replacement component, the replacement component comprising a mounting rail (31), a fixing hole (32), a particle adsorption sponge layer (33), and a mounting hole (34), the mounting rail (31) being fixed on both sides of the inside of the processing box (11), the fixing hole (32) being opened at one end of the mounting rail (31), the particle adsorption sponge layer (33) being slidably mounted inside the mounting rail (31), and the mounting hole (34) being opened at one side of the particle adsorption sponge layer (33).

6. The waste gas treatment device for a laboratory fume hood according to claim 5, characterized in that: A second spring (35) is fixed inside the mounting hole (34), a clamping column (36) is fixed to one end of the second spring (35), a distal end of the clamping column (36) extends into the fixing hole (32), and a nano adsorption strip (37) is installed at the lower end of the mounting rail (31).

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