Anti-blocking filtering device of universal exhaust hood

Abstract

The utility model belongs to the field of universal exhaust hoods, and discloses an anti-blocking filtering device of a universal exhaust hood, which comprises an exhaust pump for sucking peculiar smell and smoke dust and a universal exhaust assembly, the universal exhaust assembly is communicated with a vertical pipe for exhausting, the lower end of the vertical pipe is communicated with the air inlet end of the exhaust pump, and the air inlet end of the exhaust pump is communicated with the air outlet end of the universal exhaust hood. A vertically-arranged branch pipe is arranged on one side of the vertical pipe, the two ends of the branch pipe are communicated with the vertical pipe, a filtering piece which is located between the two ends of the branch pipe and can elastically deform is arranged in the vertical pipe, a plurality of filtering holes are formed in the filtering piece, and the edge of the filtering piece is connected with the inner circumferential face of the vertical pipe. According to the scheme, dust particles and other impurities are filtered in the pipeline of the universal exhaust hood, meanwhile, pipeline blockage caused by filtering is avoided, exhaust smoothness is kept, and the service life of the exhaust pump is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of universal exhaust hoods, in particular to an anti-blocking filtering device for universal exhaust hoods. Background Art

[0002] The universal exhaust hood is a commonly used suction device, which is mainly used to exhaust smoke and harmful gases. It is widely used in laboratories, inspection vehicles and other scenes. In specific use, the exhaust pipe section of the universal exhaust hood is connected to the vacuum pump. During the suction process, the universal exhaust hood will also suck in foreign matter such as dust particles in the surrounding area. Dust particles and other foreign matter enter the vacuum pump through the output pipe section of the universal exhaust hood, which can easily cause damage to the vacuum pump and shorten the life of the vacuum pump. In order to extend the service life of the vacuum pump, a filter is often provided between the vacuum pump and the output pipe section for interception. However, after long-term use, the filter will be blocked by foreign matter. At this time, the airflow through the filter in the pipe section is reduced, and even the airflow cannot pass, which seriously affects the exhaust effect of the universal exhaust hood. Utility Model Content

[0003] The utility model provides an anti-blocking filtering device for a universal exhaust hood, which can filter impurities such as dust particles in a pipeline of the universal exhaust hood, avoid pipeline blockage due to filtering, maintain exhaust smoothness, and extend the service life of the exhaust pump.

[0004] The technical solution provided by the utility model is: an anti-blocking filtering device for a universal exhaust hood, comprising an exhaust pump for extracting odors and smoke and a universal exhaust assembly, the universal exhaust assembly is connected to a vertical pipe for exhaust, the lower end of the vertical pipe is connected to the air inlet end of the exhaust pump, a vertical branch pipe is provided on one side of the vertical pipe, both ends of the branch pipe are connected to the vertical pipe, an elastically deformable filter element is provided in the vertical pipe and is located between the two ends of the branch pipe, a plurality of filter holes are provided on the filter element, and the edge of the filter element is connected to the inner circumference of the vertical pipe.

[0005] In the anti-clogging filtering device of the universal exhaust hood, the vertical pipe includes an air inlet section connected to the universal exhaust assembly, an air outlet section connected to the air inlet end of the exhaust pump, and a filter section arranged between the air inlet section and the air outlet section; the upper end surface of the filter section and the lower end surface of the air inlet section, and the lower end surface of the filter section and the upper end surface of the air outlet section are transitionally matched; the branch pipe is respectively connected to the air inlet section and the air outlet section;

[0006] The outer surfaces of the air inlet section and the air outlet section are fixedly connected with rotating ears, the outer surface of the filter section is fixedly connected with a rotating shaft located between the two rotating ears, the rotating shaft is rotationally matched with the rotating ears on both sides, and the edge of the filter element is fixedly connected to the inner circumferential surface of the filter section.

[0007] In the above-mentioned anti-clogging filtering device of the universal exhaust hood, sealing rings for filling the gap are fixedly connected to the upper end surface and the lower end surface of the filtering section.

[0008] In the above-mentioned anti-clogging filtering device for the universal exhaust hood, the branch pipe is arranged on a side of the vertical pipe away from the rotating ear.

[0009] In the anti-clogging filtering device of the above-mentioned universal exhaust hood, a convex edge is provided in the filter section, and the convex edge is fixed around the inner circumference of the filter section. A pressure ring is provided directly above the convex edge, and the pressure ring and the convex edge are detachably connected by bolts, and the edge of the filter element is clamped between the pressure ring and the convex edge.

[0010] In the above-mentioned anti-clogging filtering device for the universal exhaust hood, a fixing hole for passing a bolt is opened on the filter element, and the fixing hole is located between the pressure ring and the convex edge.

[0011] In the anti-clogging filtering device of the universal exhaust hood mentioned above, a power generation component and a light-emitting component fixedly connected to the power generation component are fixedly connected to the outer surface of the branch pipe, and the light-emitting component is conductively connected to the power generation component. A rotatable impeller and an axis core fixedly connected to the impeller are provided in the branch pipe, and the axis core passes through the branch pipe and is fixedly connected to the power generation component. The outer peripheral surface of the axis core rotates with the branch pipe.

[0012] In the anti-blocking filtering device of the universal exhaust hood, a light-transmitting protective cover is fixedly connected to the outer side surface of the branch pipe, and the power generation assembly and the light-emitting element are arranged in the protective cover.

[0013] In the anti-clogging filtering device of the universal exhaust hood, elbows are provided between the two ends of the branch pipe and the vertical pipe, and the two ends of the branch pipe are connected to the vertical pipe through the corresponding elbows, and the angle of the elbow is 45 degrees.

[0014] In the above-mentioned anti-clogging filtering device of the universal exhaust hood, the universal exhaust assembly includes an exhaust hood and a folding tube arm, and the exhaust hood, the folding tube arm and the air inlet end of the vertical pipe are connected.

[0015] After adopting the above technical solution, the utility model has the following beneficial effects:

[0016] The technical solution arranges a filter element in the vertical pipe. Under the action of the suction force of the vacuum pump and gravity, foreign matters such as dust particles fall vertically in the vertical pipe to the filter element, thereby preventing the foreign matters from falling into the vacuum pump. When the filter element is blocked by foreign matters, the filter element elastically deforms under the continuous suction of the vacuum pump, and the middle part of the filter element gradually concavely forms a cavity. The filter element receives more foreign matters through the cavity. At the same time, due to the blockage of the filter element, the pressure in the branch pipe increases, and the gas flows from the branch pipe to the vacuum pump, thereby preventing the suction force of the universal vacuum hood from being reduced due to the blockage of the filter element, thereby preventing the suction effect from being affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the anti-blocking filtering device of the universal exhaust hood of Example 1 of the utility model;

[0018] Figure 2 It is a structural cross-sectional view of the filter section of Example 1 of the utility model;

[0019] Figure 3 Schematic diagram of the cleaning state of the anti-blocking filter device of the universal exhaust hood of Example 1 of the utility model;

[0020] Figure 4 The utility model Figure 3 A partial enlarged view of A;

[0021] Figure 5 It is a schematic structural diagram of the filter element of Example 1 of the utility model.

[0022] Reference numerals: 1, universal air extraction assembly; 2, vertical pipe; 3, air extraction pump; 4, elbow; 5, branch pipe; 6, protective cover; 7, impeller; 8, power generation assembly; 9, light-emitting component;

[0023] 11. Exhaust hood; 12. Folding tube arm;

[0024] 21. air inlet section; 22. rotating ear; 23. rotating shaft; 24. filter section; 25. sealing ring; 26. air outlet section; 27. pressure ring; 28. filter element; 29. ​​flange;

[0025] 281, fixing hole; 282, filtering hole. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods, but does not constitute any limitation to the present invention.

[0027] Embodiment 1:

[0028] like Figure 1-5As shown, a blocking-proof filtering device for a universal exhaust hood comprises an exhaust pump 3 for extracting odor and smoke and a universal exhaust assembly 1. The universal exhaust assembly 1 is connected to a vertical pipe 2 for exhaust. The lower end of the vertical pipe 2 is connected to the air inlet end of the exhaust pump 3. A vertical branch pipe 5 is provided on one side of the vertical pipe 2. Both ends of the branch pipe 5 are connected to the vertical pipe 2. An elastically deformable filter element 28 is provided between the two ends of the branch pipe 5 in the vertical pipe 2. A plurality of filter holes 282 are provided on the filter element 28. The edge of the filter element 28 is connected to the inner circumference of the vertical pipe 2.

[0029] The implementation principle is as follows: a filter element 28 is arranged in the vertical pipe 2. Under the action of the suction force of the vacuum pump 3 and gravity, foreign matters such as dust particles fall vertically in the vertical pipe 2 to the filter element 28, so as to prevent the foreign matters from falling into the vacuum pump 3. When the filter element 28 is blocked by foreign matters, the filter element 28 elastically deforms under the continuous suction of the vacuum pump 3, and the middle part of the filter element 28 gradually concave to form a concave cavity. The filter element 28 receives more foreign matters through the concave cavity. At the same time, due to the blockage of the filter element 28, the pressure in the branch pipe 5 is increased, and the gas flows from the branch pipe to the vacuum pump 3, so as to avoid the reduction of the suction force of the vacuum hood 11 due to the blockage of the filter element 28, thereby preventing the suction effect from being affected.

[0030] In some embodiments, a filter cotton for absorbing odor is provided in the vertical pipe 2 and located between the filter element 28 and the vacuum pump 3 .

[0031] Combination Figure 1 and Figure 3 As shown, the specific structure of the vertical pipe 2 is that the vertical pipe 2 includes an air inlet section 21 connected to the universal air extraction component 1, an air outlet section 26 connected to the air inlet end of the air extraction pump 3, and a filter section 24 arranged between the air inlet section 21 and the air outlet section 26; the upper end surface of the filter section 24 is transitionally matched with the lower end surface of the air inlet section 21, and the lower end surface of the filter section 24 is transitionally matched with the upper end surface of the air outlet section 26; the branch pipe 5 is respectively connected to the air inlet section 21 and the air outlet section 26;

[0032] The specific connection method of the filter section 24 is that the outer surfaces of the air inlet section 21 and the air outlet section 26 are fixedly connected with rotating ears 22, and the outer surface of the filter section 24 is fixedly connected with a rotating shaft 23 located between the two rotating ears 22. The rotating shaft 23 is rotatably matched with the rotating ears 22 on both sides, and the edge of the filter element 28 is fixedly connected to the inner circumferential surface of the filter section 24.

[0033] In this embodiment, the structure of the vertical pipe 2 is set to enable the filter element 28 to be cleaned in real time. When the filter element 28 needs to be cleaned, the filter segment 24 is rotated and the filter segment 24 swings around the axis of the rotating shaft 23 until the filter segment 24 moves to one side of the air inlet segment 21 and the air outlet segment 26. At this time, the filter segment 24 is in a misaligned state with the air inlet segment 21 and the air outlet segment 26, that is, the axis of the filter segment 24 is not on the same axis as the axes of the other two segments, and the upper port and the lower port of the filter segment 24 are exposed to the external environment, which is convenient for cleaning the filter element 28. After cleaning, the filter segment 24 is rotated to align and fit the upper end of the filter segment 24 with the lower port of the air inlet segment 21 and the lower port of the filter segment 24 with the upper port of the air outlet segment 26 to re-form the suction channel.

[0034] like Figure 2 As shown, preferably, a sealing ring 25 for filling the gap is fixedly connected to the upper end surface and the lower end surface of the filter section 24 .

[0035] When the filter section 24 is aligned with the air inlet section 21 and the air outlet section 26, the filter section 24 is pressed against the air inlet section 21 and the air outlet section 26 through the sealing ring 25. The sealing ring 25 uses its own compressible elastic deformation to fill the gap, thereby enhancing the airtightness of the connection.

[0036] In this embodiment, the branch pipe 5 is disposed on a side of the vertical pipe 2 away from the rotating ear 22 .

[0037] As a further improvement, a flange 29 is provided inside the filter segment 24, and the flange 29 is fixed around the inner circumference of the filter segment 24. A pressure ring 27 is provided directly above the flange 29. The pressure ring 27 and the flange 29 are detachably connected by bolts, and the edge of the filter element 28 is clamped between the pressure ring 27 and the flange 29.

[0038] The filter element 28 is fixed in the filter section 24 by being clamped by the convex edge 29 and the pressure ring 27, so that the filter element 28 can be removed from the vertical pipe 2, which is convenient for cleaning or replacement, thereby improving practicality.

[0039] like Figure 5 As shown, in another preferred embodiment, a fixing hole 281 for passing a bolt is opened on the filter element 28 , and the fixing hole 281 is located between the pressure ring 27 and the flange 29 .

[0040] like Figure 4 As shown, another improvement of the present embodiment, the outer surface of the branch pipe 5 is fixedly connected with a power generation component 8 and a light emitting component 9 fixedly connected to the power generation component 8, the light emitting component 9 is conductively connected to the power generation component 8, a rotatable impeller 7 and an axis core fixedly connected to the impeller 7 are provided in the branch pipe 5, the axis core passes through the branch pipe 5 and is fixedly connected to the power generation component 8, and the outer peripheral surface of the axis core is rotatably matched with the branch pipe 5.

[0041] The power generation component 8, the light emitting component 9 and the impeller 7 cooperate with each other so that the airflow velocity in the branch pipe 5 can be intuitively known. When the airflow in the branch pipe 5 is enhanced to a preset velocity value, the impeller 7 also reaches a preset speed value driven by the airflow. At this time, the impeller 7 transfers kinetic energy to the power generation component 8 through the shaft core. The power generation component 8 converts the kinetic energy into electrical energy and outputs it to the light emitting component 9. The light emitting component 9 generates light. Through the light of the light emitting component 9, it can be directly known that the airflow in the branch pipe 5 is relatively enhanced. Correspondingly, it can also be indirectly known that the filter element 28 of the vertical pipe 2 is blocked, and the cleaning of the filter element 28 can be quickly arranged to maintain the efficient operation of the exhaust hood 11.

[0042] Preferably, a light-transmitting protective cover 6 is fixedly connected to the outer side surface of the branch pipe 5 , and the power generation component 8 and the light-emitting element 9 are arranged inside the protective cover 6 .

[0043] Combination Figure 1 and Figure 3 As shown, in actual application, elbows 4 are provided between both ends of the branch pipe 5 and the vertical pipe 2. Both ends of the branch pipe 5 are connected to the vertical pipe 2 through the corresponding elbows 4, and the corner of the elbow 4 is 45 degrees.

[0044] The 45-degree elbow 4 is set so that the upper end of the branch pipe 5 and the vertical pipe 2 form a Y-shaped structure, avoiding the airflow direction of the vertical pipe 2 and the airflow direction of the upper end of the branch pipe 5 being perpendicular to each other, thereby reducing the generation of turbulence.

[0045] The specific structure of the universal exhaust assembly 1 is that the universal exhaust assembly 1 includes an exhaust hood 11 and a folding tube arm 12 , and the exhaust hood 11 , the folding tube arm 12 and the air inlet end of the vertical pipe 2 are connected.

[0046] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principle of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A universal exhaust hood anti-blocking filtering device, comprising an exhaust pump for extracting odor and smoke and a universal exhaust assembly, wherein the universal exhaust assembly is connected to a vertical pipe for exhaust, and the lower end of the vertical pipe is connected to the air inlet end of the exhaust pump, characterized in that: A vertical branch pipe is provided on one side of the vertical pipe, both ends of the branch pipe are connected to the vertical pipe, and an elastically deformable filter element is provided in the vertical pipe and is located between the two ends of the branch pipe. A plurality of filter holes are provided on the filter element, and the edge of the filter element is connected to the inner circumference of the vertical pipe; Elbows are provided between the two ends of the branch pipe and the vertical pipe, and the two ends of the branch pipe are connected with the vertical pipe through the corresponding elbows, and the angle of the elbow is 45 degrees.

2. The anti-blocking filtering device of the universal exhaust hood according to claim 1, characterized in that: The vertical pipe includes an air inlet section connected to the universal air extraction assembly, an air outlet section connected to the air inlet end of the air extraction pump, and a filter section arranged between the air inlet section and the air outlet section; the upper end surface of the filter section and the lower end surface of the air inlet section, and the lower end surface of the filter section and the upper end surface of the air outlet section are transitionally matched; the branch pipe is respectively connected to the air inlet section and the air outlet section; The outer surfaces of the air inlet section and the air outlet section are fixedly connected with rotating ears, the outer surface of the filter section is fixedly connected with a rotating shaft located between the two rotating ears, the rotating shaft is rotationally matched with the rotating ears on both sides, and the edge of the filter element is fixedly connected to the inner circumferential surface of the filter section.

3. The anti-blocking filtering device of the universal exhaust hood according to claim 2, characterized in that: The upper end surface and the lower end surface of the filter section are both fixedly connected with sealing rings for filling the gap.

4. The anti-blocking filtering device of the universal exhaust hood according to claim 2, characterized in that: The branch pipe is arranged on a side of the vertical pipe away from the rotating ear.

5. The anti-blocking filtering device of the universal exhaust hood according to claim 2, characterized in that: A convex edge is provided in the filter section, and the convex edge is fixed around the inner circumference of the filter section. A pressure ring is provided directly above the convex edge. The pressure ring and the convex edge are detachably connected by bolts, and the edge of the filter element is clamped between the pressure ring and the convex edge.

6. The anti-blocking filtering device of the universal exhaust hood according to claim 5, characterized in that: The filter element is provided with a fixing hole for passing a bolt, and the fixing hole is located between the pressure ring and the convex edge.

7. The anti-blocking filtering device of the universal exhaust hood according to any one of claims 1 to 6, characterized in that: The outer surface of the branch pipe is fixedly connected to a power generation component and a light-emitting component fixedly connected to the power generation component, and the light-emitting component is conductively connected to the power generation component. A rotatable impeller and an axis core fixedly connected to the impeller are provided in the branch pipe. The axis core passes through the branch pipe and is fixedly connected to the power generation component. The outer peripheral surface of the axis core is rotatably matched with the branch pipe.

8. The anti-blocking filtering device of the universal exhaust hood according to claim 7, characterized in that: A light-transmitting protective cover is fixedly connected to the outer side surface of the branch pipe, and the power generation component and the light-emitting component are arranged in the protective cover.

9. The anti-blocking filtering device of the universal exhaust hood according to any one of claims 1 to 6, characterized in that: The universal air extraction assembly comprises an air extraction hood and a folding tube arm, and the air extraction hood, the folding tube arm and the air inlet end of the vertical pipe are communicated.

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