Novel universal exhaust fume collecting hood for waste gas collection

Abstract

The utility model relates to the technical field of exhaust fume collecting hoods, in particular to a novel universal exhaust fume collecting hood for waste gas collection, which comprises a fixed pipe and a hood body, a rotating pipe with a closed lower side is arranged below the fixed pipe, a fixed ring is fixedly connected to the outer wall of the fixed pipe, and a rotating ring is fixedly connected to the outer wall of the rotating pipe. An annular sliding groove is formed in the upper end of the rotating ring, an annular sliding rail is slidably connected into the annular sliding groove, and a connecting ring is fixedly connected between the annular sliding rail and the fixing ring. When the two vertical plates are rotated, the cover body can be driven to rotate in the horizontal direction until the orientation of the cover body is adjusted to a required angle, so that the purpose of conveniently adjusting the angle of the cover body to improve the use flexibility is achieved, the cover body can be prevented from moving around the two rotating shafts under the condition that the worm is not rotated, and the use flexibility is improved. And the position of the rotating ring is locked through the locking mechanism, and locking of the angle position of the cover body is completed at the same time, so that the purpose of improving the position stability of the cover body after angle adjustment is completed is achieved.

Description

Technical Field

[0001] This utility model relates to the field of smoke collection hood technology, specifically a novel universal smoke collection hood for collecting waste gas. Background Technology

[0002] A fume hood is a key environmental control device used to capture, control, and remove harmful gases, fumes, and particulate pollutants generated during industrial or experimental processes. It connects to a negative pressure pipeline to create a stable airflow field around the pollution source, effectively capturing pollutants and guiding them to a filtration system for treatment, ensuring air quality in the work environment and the safety of operators.

[0003] In existing technologies, the installation angle of smoke hoods is usually a fixed design, but some smoke hoods are connected to bamboo tubes, which allow for flexible adjustment of the smoke hood's angle.

[0004] With the rapid development of technology, fixed-angle smoke hoods cannot flexibly adjust their angle according to the location of the pollution source. When the smoke hood connected to the joint tube is subjected to external impact, the joint tube connection is prone to displacement, resulting in insufficient angular stability of the smoke hood and difficulty in maintaining the preset position. Therefore, it is necessary to propose a new type of universal smoke hood for waste gas collection to solve the above-mentioned problems. Summary of the Invention

[0005] The purpose of this utility model is to provide a novel universal smoke collection hood for waste gas collection, which has the characteristics of easy adjustment of the angle of the hood to improve the flexibility of use and improve the positional stability of the hood after the angle adjustment is completed.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a novel universal smoke collection hood for collecting exhaust gas, comprising a fixed pipe and a hood body, wherein a rotating pipe with a closed lower side is provided below the fixed pipe, a fixed ring is fixedly connected to the outer wall of the fixed pipe, a rotating ring is fixedly connected to the outer wall of the rotating pipe, an annular groove is provided at the upper end of the rotating ring, an annular slide rail is slidably connected inside the annular groove, a connecting ring is fixedly connected between the annular slide rail and the fixed ring, and a locking mechanism is provided on the outer side of the fixed ring;

[0007] Below the rotating tube is a movable tube with a closed upper side. The cover is installed at the lower end of the movable tube. A bamboo joint tube connects the movable tube and the rotating tube. Vertical plates are provided on both the left and right sides of the bamboo joint tube. A rotating shaft that is fixedly connected to the movable tube is rotatably connected to the opposite side of the two vertical plates. A transmission mechanism is provided on the left side of the movable tube.

[0008] The transmission mechanism includes a frame fixedly connected to the left end of the left vertical plate. A worm gear is rotatably connected inside the frame. A worm wheel is meshed with the outer wall of the worm gear. A transmission shaft passing through the left vertical plate is fixedly connected between the worm wheel and the left rotating shaft.

[0009] Preferably, the locking mechanism includes an anti-slip ring fixedly connected to the outer wall of the fixed tube, a connecting ring fixedly connected to the outer wall of the rotating ring, two screws threadedly connected through the outer wall of the connecting ring, a pressing disc fixedly connected to the upper end of each of the two screws and abutting against the lower end of the anti-slip ring, and a torsion block fixedly connected to the lower end of each of the two screws, the cross-section of each of the two torsion blocks being a regular hexagonal structure.

[0010] Preferably, the upper end of the worm gear is fixedly connected to a connecting shaft that penetrates the frame, the upper end of the connecting shaft is provided with a square groove, a square rod is provided above the square groove, and a handwheel is fixedly connected to the upper end of the square rod.

[0011] Preferably, the upper end of the rotating ring is fixedly connected to a sealing ring that abuts against the fixed ring via a groove.

[0012] Preferably, each of the two vertical plates is fixedly connected to a retaining column on one of their opposite sides, and both retaining columns are fixedly connected to the rotating tube.

[0013] Preferably, a flange is welded to the upper end of the fixed tube.

[0014] Preferably, the upper end of the frame is fixedly connected to an anti-touch cylinder located outside the connecting shaft.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] When the worm gear is rotated to drive the worm wheel to rotate, the cover can be rotated around the axis to the front or back. Then, the locking mechanism releases the locking state of the rotating ring. Then, when the two vertical plates are rotated, the cover can be rotated in the horizontal direction until the orientation of the cover is adjusted to the required angle, thereby facilitating the adjustment of the cover angle and improving the flexibility of use.

[0017] Because the worm gear and worm wheel have a self-locking characteristic, the cover can be prevented from moving around the two shafts when the worm gear is not rotated. The position of the rotating ring is locked by the locking mechanism, and the angle position of the cover is locked at the same time, thereby improving the positional stability of the cover after the angle adjustment is completed. Attached Figure Description

[0018] Figure 1 This is a front sectional view of the present invention.

[0019] Figure 2For the present utility model Figure 1 Enlarged view of point A in the middle;

[0020] Figure 3 This is a structural diagram of the connection at the fixed tube of this utility model;

[0021] Figure 4 This is a diagram of the external structure of the rotating ring of this utility model.

[0022] The markings in the diagram are: 1. Fixed tube; 2. Cover body; 3. Rotating tube; 4. Fixed ring; 5. Rotating ring; 6. Annular groove; 7. Connecting ring; 8. Annular slide rail; 9. Anti-slip ring; 10. Connecting ring; 11. Screw; 12. Sealing ring; 13. Movable tube; 14. Bamboo joint tube; 15. Vertical plate; 16. Rotating shaft; 17. Frame body; 18. Worm gear; 19. Worm wheel; 20. Connecting shaft; 21. Square groove; 22. Square rod; 23. Extrusion plate; 24. Torsion block. Detailed Implementation

[0023] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0024] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0025] Please see Figures 1 to 4 A novel universal smoke hood for collecting exhaust gas includes a fixed pipe 1 and a hood body 2. A rotating pipe 3 with a closed lower side is provided below the fixed pipe 1. A fixed ring 4 is fixedly connected to the outer wall of the fixed pipe 1. A rotating ring 5 is fixedly connected to the outer wall of the rotating pipe 3. An annular groove 6 is provided at the upper end of the rotating ring 5. An annular slide rail 8 is slidably connected inside the annular groove 6. A connecting ring 7 is fixedly connected between the annular slide rail 8 and the fixed ring 4. A locking mechanism is provided on the outer side of the fixed ring 4.

[0026] Below the rotating tube 3 is a movable tube 13 with a closed upper side. The cover 2 is installed at the lower end of the movable tube 13. A bamboo joint tube 14 connects the movable tube 13 and the rotating tube 3. Vertical plates 15 are provided on both the left and right sides of the bamboo joint tube 14. A rotating shaft 16 fixedly connected to the movable tube 13 is rotatably connected to the opposite side of the two vertical plates 15. A transmission mechanism is provided on the left side of the movable tube 13.

[0027] The transmission mechanism includes a frame 17 fixedly connected to the left end of the left vertical plate 15. A worm gear 18 is rotatably connected inside the frame 17. A worm wheel 19 is meshed with the outer wall of the worm gear 18. A transmission shaft passing through the left vertical plate 15 is fixedly connected between the worm wheel 19 and the left rotating shaft 16.

[0028] In this embodiment: When in use, the worm gear 18 is rotated, which in turn drives the worm wheel 19 to rotate. At the same time, the left rotating shaft 16 is driven to rotate through the transmission shaft, and the movable tube 13 is driven to rotate with the right rotating shaft 16. At the same time, the cover 2 is driven to rotate forward or backward. During this process, since the bamboo tube 14 can be bent at will, it can adapt to the movement of the movable tube 13, thereby adjusting the angle of the cover 2 in the front and back directions.

[0029] Subsequently, the locking mechanism releases the locking state of the rotating ring 5. When the two vertical plates 15 are rotated, due to the setting of the annular slide rail 8 and the annular slide groove 6, the rotating tube 3, the bamboo joint tube 14, the movable tube 13 and the rotating ring 5 can be driven to rotate, and the cover 2 can be driven to rotate until the orientation of the cover 2 is adjusted to the required angle, thereby facilitating the adjustment of the angle of the cover 2 and improving the flexibility of use.

[0030] Because the worm gear 18 and worm wheel 19 have a self-locking characteristic, the cover 2 can be prevented from moving around the two rotating shafts 16 when the worm gear 18 is not rotated. Then, the position of the rotating ring 5 is locked by the locking mechanism, and the angle position of the cover 2 is locked at the same time. In this way, the positional stability of the cover 2 is improved after the angle adjustment is completed.

[0031] As a technical optimization of this utility model, the locking mechanism includes an anti-slip ring 9 fixedly connected to the outer wall of the fixed tube 1, a connecting ring 10 fixedly connected to the outer wall of the rotating ring 5, and two screws 11 threadedly connected to the outer wall of the connecting ring 10. The upper ends of the two screws 11 are fixedly connected to a pressing disc 23 that abuts against the lower end of the anti-slip ring 9, and the lower ends of the two screws 11 are fixedly connected to a torsion block 24. The cross-section of the two torsion blocks 24 is a regular hexagonal structure.

[0032] In this embodiment: when the locking state of the rotating ring 5 is to be released, since the cross-section of the two torsion blocks 24 is a regular hexagonal structure, the two torsion blocks 24 can be rotated by a wrench, thereby driving the two screws 11 and the two extrusion discs 23 to rotate. Since the two screws 11 are threadedly connected to the connecting ring 10, the two extrusion discs 23 can move downward and disengage from the anti-slip ring 9, thereby releasing the locking state of the rotating ring 5.

[0033] When the position of the rotating ring 5 is to be locked, the two torsion blocks 24 are rotated in the opposite direction by the wrench, which causes the two extrusion discs 23 to move upward and come into close contact with the anti-slip ring 9. A large extrusion force and static friction are generated between the two extrusion discs 23 and the anti-slip ring 9, thereby locking the position of the rotating ring 5.

[0034] As a technical optimization of this utility model, the upper end of the worm gear 18 is fixedly connected to a connecting shaft 20 that passes through the frame 17. The upper end of the connecting shaft 20 is provided with a square groove 21, and a square rod 22 is provided above the square groove 21. A handwheel is fixedly connected to the upper end of the square rod 22.

[0035] In this embodiment: the square rod 22 is inserted into the square groove 21. Since the two are matched, when the handwheel is turned, the connecting shaft 20 can be rotated, which in turn can drive the worm gear 18 to rotate. After the handwheel is used, the square rod 22 can be pulled out from the square groove 21.

[0036] As a technical optimization of this utility model, the upper end of the rotating ring 5 is fixedly connected to a sealing ring 12 that abuts against the fixed ring 4 through a groove.

[0037] In this embodiment: by setting a sealing ring 12, and since the sealing ring 12 and the lower end of the fixed ring 4 are always in contact, during operation, the leakage of flue gas between the rotating ring 5 and the fixed ring 4 can be prevented.

[0038] As a technical optimization of this utility model, each of the two vertical plates 15 is fixedly connected to a retaining column on one side opposite to the other, and both retaining columns are fixedly connected to the rotating tube 3.

[0039] In this embodiment, two retaining columns are used to connect and fix the two vertical plates 15 and the rotating tube 3.

[0040] As a technical optimization of this utility model, a flange is welded to the upper end of the fixed pipe 1.

[0041] In this embodiment: a flange is provided to facilitate the connection of the fixed pipe 1 to the negative pressure pipe.

[0042] As a technical optimization of this utility model, the upper end of the frame 17 is fixedly connected with an anti-touch cylinder located outside the connecting shaft 20.

[0043] In this embodiment, an anti-touch sleeve is provided to prevent accidental rotation of the connecting shaft 20.

[0044] Working principle: First, the square rod 22 is inserted into the square groove 21. Since the two are matched, when the handwheel is turned, the connecting shaft 20 can be rotated, which in turn drives the worm gear 18 to rotate, and then drives the worm wheel 19 to rotate. At the same time, the transmission shaft drives the left rotating shaft 16 to rotate, and the movable tube 13 rotates with the right rotating shaft 16. This also drives the cover 2 to rotate forward or backward. During this process, since the bamboo tube 14 can be bent at will, it can adapt to the movement of the movable tube 13, and thus adjust the angle of the cover 2 in the front and back directions.

[0045] Then, by turning the two torsion blocks 24 with a wrench, the two screws 11 and the two extrusion discs 23 are driven to rotate. Since the two screws 11 are threadedly connected to the connecting ring 10, the two extrusion discs 23 can move downward and disengage from the anti-slip ring 9, thereby releasing the locking state of the rotating ring 5. When rotating the two vertical plates 15, due to the setting of the annular slide rail 8 and the annular slide groove 6, the rotating tube 3, the bamboo joint tube 14, the movable tube 13 and the rotating ring 5 can be driven to rotate, and the cover 2 can be driven to rotate until the orientation of the cover 2 is adjusted to the required angle, thereby facilitating the adjustment of the angle of the cover 2 and improving the flexibility of use.

[0046] Then, the square rod 22 is pulled out from the inside of the square groove 21. Since the worm gear 18 and the worm wheel 19 have a self-locking characteristic, the cover 2 can be prevented from moving around the two rotating shafts 16 without rotating the worm gear 18. Then, by turning the two torsion blocks 24 in the opposite direction with a wrench, the two pressing discs 23 can be moved upward and closely abutted against the anti-slip ring 9. A large pressing force and static friction are generated between the two pressing discs 23 and the anti-slip ring 9, which can lock the position of the rotating ring 5 and lock the angle position of the cover 2. In this way, the positional stability of the cover 2 after the angle adjustment is completed is improved.

[0047] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A new type of universal exhaust gas collecting hood for collecting exhaust gas, comprising a fixed pipe (1) and a hood body (2), characterized in that: The lower part of the fixed pipe (1) is provided with a rotating pipe (3) with a closed structure at the lower side, the outer wall of the fixed pipe (1) is fixedly connected with a fixed ring (4), the outer wall of the rotating pipe (3) is fixedly connected with a rotating ring (5), the upper end of the rotating ring (5) is provided with an annular sliding groove (6), the inner part of the annular sliding groove (6) is slidably connected with an annular sliding rail (8), the annular sliding rail (8) and the fixed ring (4) are fixedly connected with a connecting ring (7), the outer side of the fixed ring (4) is provided with a locking mechanism. The lower part of the rotating pipe (3) is provided with a movable pipe (13) with a closed structure at the upper side, the cover body (2) is installed at the lower end of the movable pipe (13), the movable pipe (13) and the rotating pipe (3) are communicated with a bamboo joint pipe (14), the left and right sides of the bamboo joint pipe (14) are provided with vertical plates (15), the opposite sides of the two vertical plates (15) are rotatably connected with rotating shafts (16) fixedly connected with the movable pipe (13), the left side of the movable pipe (13) is provided with a transmission mechanism. The transmission mechanism comprises a frame body (17) fixedly connected to the left end of the left vertical plate (15), the inner part of the frame body (17) is rotatably connected with a worm (18), the outer wall of the worm (18) is meshingly connected with a worm wheel (19), the worm wheel (19) and the left rotating shaft (16) are fixedly connected with a transmission shaft penetrating through the left vertical plate (15).

2. A new type of universal exhaust gas collecting smoke hood according to claim 1, characterized in that: The locking mechanism comprises an anti-skid ring (9) fixedly connected to the outer wall of the fixed pipe (1), the outer wall of the rotating ring (5) is fixedly connected with a connecting ring (10), the outer wall of the connecting ring (10) penetrates and is threadedly connected with two screw rods (11), the upper ends of the two screw rods (11) are fixedly connected with extrusion discs (23) abutting against the lower end of the anti-skid ring (9), the lower ends of the two screw rods (11) are fixedly connected with torsion blocks (24), the cross sections of the two torsion blocks (24) are hexagonal structures.

3. A new type of universal exhaust gas collecting smoke hood according to claim 1, characterized in that: The upper end of the worm (18) is fixedly connected with a connecting shaft (20) penetrating through the frame body (17), the upper end of the connecting shaft (20) is provided with a square slot (21), the upper part of the square slot (21) is provided with a square rod (22), the upper end of the square rod (22) is fixedly connected with a hand wheel.

4. A new type of universal exhaust gas collecting smoke hood according to claim 1, characterized in that: The upper end of the rotating ring (5) is fixedly connected with a sealing ring (12) abutting against the fixed ring (4) through a groove.

5. A new type of universal exhaust gas collecting smoke hood according to claim 1, characterized in that: The opposite sides of the two vertical plates (15) are fixedly connected with retaining columns, the two retaining columns are fixedly connected with the rotating pipe (3).

6. A new type of universal exhaust gas collecting smoke hood according to claim 1, characterized in that: The upper end of the fixed pipe (1) is welded with a flange plate.

7. A new type of universal exhaust gas collecting smoke hood according to claim 3, characterized in that: The upper end of the frame body (17) is fixedly connected with an anti-touch cylinder outside the connecting shaft (20).

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