Anti-falling mute cylinder for oil smoke pipeline

Abstract

The invention is suitable for the field of ventilation equipment, and provides an oil smoke pipeline anti-falling silent cylinder which comprises a plastic cylinder, a lifting mechanism is arranged above the plastic cylinder, plastic wavy pipes are arranged at the front end and the rear end of the plastic cylinder and connected to a pipe opening of a ventilation pipeline, a closed inner container is arranged in the plastic cylinder, and the closed inner container is arranged in the plastic cylinder. A wind resistance mechanism is arranged in the closed inner container; the wind resistance mechanism comprises four air channels which are arranged in a rectangular array in the side wall of the closed inner container. When the vibration of the exhaust pipeline system is transmitted to the plastic cylinder, the plastic cylinder can absorb the vibration, so that the noise of the whole exhaust pipeline is reduced, the noise can be prevented from entering other rooms along the metal exhaust pipeline, the transverse column and the cover piece can be turned over by 180 degrees up and down, the cover piece can fall down to cover the front end opening of the air duct, and the air duct is prevented from falling off. At the moment, the air can only flow to the front end from the rear end of the air duct, and the cover piece falls down to cover the front end opening of the air duct, so that the function of preventing gas backflow is achieved.

Description

Technical Field

[0001] This invention belongs to the field of ventilation equipment, and specifically relates to a silent cylinder for preventing oil fume ducts from falling. Background Technology

[0002] Exhaust pipes are essential equipment in factories or kitchens, which can quickly expel harmful gases from the room to the outside, thereby reducing harm to workers. However, for exhaust pipes in chemical laboratories, the fumes or gases inside the laboratory may contain corrosive or even toxic substances, which requires special treatment of these harmful gases. Secondly, the ventilation duct has a relatively large space, which makes it easy for the pressure inside the ventilation duct to be unstable. If gas backflow occurs, the original harmful gases inside the ventilation duct can easily rush out from the inlet. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a silent, anti-falling cylinder for kitchen exhaust ducts. When in use, the plastic cylinder absorbs vibrations transmitted from the exhaust duct system, thereby reducing the noise of the entire exhaust duct. This also prevents noise from entering other rooms along the metal exhaust duct. The horizontal column and cover can rotate 180 degrees, with the cover falling down to cover the front end of the duct. At this point, air can only flow from the rear end to the front end of the duct, but not from the front end to the rear end. The cover also prevents backflow of gas, thus solving the problems mentioned in the background art.

[0004] To solve the above problems, the present invention provides the following technical solution: a silent anti-fall cylinder for kitchen exhaust ducts, comprising a plastic cylinder, a lifting mechanism at the top of the plastic cylinder, plastic corrugated pipes at both the front and rear ends of the plastic cylinder, the plastic corrugated pipes being connected to the openings of ventilation ducts, a closed inner liner inside the plastic cylinder, and a wind resistance mechanism inside the closed inner liner; the wind resistance mechanism includes four air ducts arranged in a rectangular array in the side wall of the closed inner liner, a sloping surface at the front of the closed inner liner forming a 15-degree angle with the vertical surface, a torsion channel above each air duct, a horizontal column movably arranged in each torsion channel, the rear end of the horizontal column being connected to the torsion mechanism and the elastic contraction mechanism; a cover plate movably arranged at the front end of the horizontal column, the cover plate being hinged to the end of the horizontal column via a hinge frame, the cover plate being able to torsion only in one direction relative to the axis of the horizontal column.

[0005] When in use, the plastic cylinder absorbs vibrations transmitted from the exhaust duct system, reducing noise throughout the entire exhaust duct. This also prevents noise from entering other rooms through the metal exhaust duct. The horizontal column and cover can rotate 180 degrees, with the cover falling down to cover the front end of the duct. In this case, air can only flow from the rear to the front of the duct, but not from the front to the rear. The cover also prevents backflow, preventing harmful gases from flowing back into the laboratory's exhaust duct, thus ensuring safety. If a large volume of air needs to be delivered, the horizontal column and cover rotate 180 degrees upwards, preventing the cover from tilting downwards relative to the horizontal column, thus fully opening the duct. This allows for rapid airflow, and even with high air pressure, backflow will not occur.

[0006] Furthermore, the hinge frame is divided into a limiting hinge block and an abutting hinge block. The limiting hinge block is fixed on the side wall of the hinge frame, and the abutting hinge block is fixed on the end of the cross column. The side of the cover plate facing the limiting hinge block is upward so that the side wall of the cover plate is parallel to the axis of the cross column.

[0007] When in use, the cover can be laid flat when the side facing the limiting hinge block is facing upwards, and when the side facing the limiting hinge block is facing downwards, the cover can rotate and tilt downwards by its own gravity, thus blocking the front opening of the air duct.

[0008] Furthermore, the cover plate consists of a double-layer structure of a lead metal plate and a rubber pad, with the rubber pad disposed on the side facing the hinge frame.

[0009] When in use, the rubber pad layer provides better airtightness when it is attached to the air duct port.

[0010] Furthermore, the torsion mechanism includes a square column at the rear end of the horizontal column, a driven gear fitted on the outer side of the square column, a square hole matching the cross-section of the square column at the center of the driven gear, a support rod on one side of the horizontal column, the support rod being fixed to the rear side wall of the closed inner liner, a tube shaft in the middle of the support rod, the tube shaft being rotatably connected to the driven gear, the square column passing through the middle of the tube shaft, a drive gear on one side of the driven gear, the drive gear and the driven gear meshing with each other, the drive gear being mounted on the output shaft of the steering motor, and the steering motor being fixed to the rear side wall of the closed inner liner.

[0011] When in use, the steering motor drives the driven gear to rotate through the drive gear. The square column and the cross column can rotate 180 degrees synchronously with the driven gear. During the synchronous rotation of the square column and the driven gear, the square column can also be inserted into the square hole inside the driven gear.

[0012] Furthermore, the elastic contraction mechanism includes an elastic plate at the end of the support rod, and a return spring is provided on the side wall of the elastic plate, the return spring being connected to the end of the square column.

[0013] During use, the return spring always pulls the square column, so the square column can always maintain the elastic force of being pushed back, which allows the cover plate to fit against the slope of the closed inner liner.

[0014] Furthermore, the lifting mechanism includes a lifting guide rail, which is fixed to the ceiling of the building. Two load-bearing sliders are slidably mounted on the lifting guide rail. The two load-bearing sliders are respectively connected to a translation mechanism. A translation hinge block is provided at the bottom of the load-bearing slider. A wrapping frame is wrapped around the outer wall of the plastic cylinder. A lifting hinge block is provided at the top of the wrapping frame. The lifting hinge block and the translation hinge block are connected by a lifting rod.

[0015] When in use, as the two load-bearing sliders expand to both sides along the hoisting guide rail, the angle of the lifting rod begins to twist and flatten. At this time, the height of the packaging frame and the plastic cylinder will be raised. If large equipment needs to pass through indoors, this will raise the height of the plastic cylinder, which can provide a path for the large equipment to pass under the plastic cylinder.

[0016] Furthermore, the translation mechanism includes two stepper motors, which are fixed to the ceiling of the building. A threaded rod is provided on the output shaft of the stepper motor, and a nut sleeve is provided on the side wall of the load-bearing slider, which is fitted onto the threaded rod.

[0017] When in use, the stepper motor drives the threaded rod to rotate, and the nut sleeve slides and moves along the threaded rod, which can apply the power to propel the load-bearing slider.

[0018] Compared with the prior art, the embodiments of this application have the following main advantages: Firstly, when the device is in use, the vibration of the exhaust duct system is transmitted to the plastic cylinder, which can absorb the vibration and reduce the noise of the entire exhaust duct. This also prevents noise from entering other rooms along the metal exhaust duct. The horizontal column and cover can be rotated 180 degrees up and down. The cover can fall down to cover the front end of the duct. At this time, the air can only flow from the rear end of the duct to the front end, but the air cannot flow from the front end to the rear end. The cover falling down to cover the front end of the duct also has the function of preventing gas backflow.

[0019] Secondly, when the two load-bearing sliders expand to both sides along the hoisting guide rail, the angle of the lifting rod begins to twist and flatten. At this time, the height of the packaging frame and the plastic cylinder will be raised. If large equipment needs to pass through indoors, this will raise the height of the plastic cylinder, which can provide a path for the large equipment to pass under the plastic cylinder. Attached Figure Description

[0020] Figure 1 This is a frontal view of the present invention.

[0021] Figure 2 For the present invention Figure 1 A magnified view of part A.

[0022] Figure 3 For the present invention Figure 1 A magnified view of part B.

[0023] Figure 4 This is a schematic diagram of the plastic tube of the present invention.

[0024] Figure 5 This is a schematic diagram of the sealed inner liner of the present invention.

[0025] Figure 6 For the present invention Figure 5 A magnified view of part C.

[0026] Figure 7 This is a schematic diagram of the cover plate of the present invention.

[0027] Figure 8 This is a schematic diagram of the air duct of the present invention.

[0028] Figure 9 For the present invention Figure 8 A magnified view of part D.

[0029] Explanation of reference numerals in the attached figures: 1. Plastic cylinder, 2. Lifting guide rail, 201. Lifting rod, 202. Packaging frame, 203. Stepper motor, 204. Threaded rod, 205. Nut sleeve, 206. Translational hinge block, 207. Lifting hinge block, 3. Plastic corrugated pipe, 4. Enclosed inner liner, 401. Air duct, 5. Horizontal column, 5. Square column, 501. Driven gear, 502. Drive gear, 503. Steering motor, 504. Support rod, 6. Tube shaft, 601. Elastic sheet, 602. Return spring, 603. Cover plate, 7. Hinge frame, 701. Detailed Implementation

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0031] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0032] This invention provides a silent, anti-fall cylinder for kitchen exhaust ducts, such as... Figure 1-9 As shown, the device includes a plastic cylinder 1, a lifting mechanism at the top of the plastic cylinder 1, and plastic corrugated pipes 3 at both the front and rear ends of the plastic cylinder 1, which are connected to the openings of ventilation ducts. A closed inner liner 4 is located inside the plastic cylinder 1, and a wind resistance mechanism is installed inside the closed inner liner 4. The wind resistance mechanism includes four rectangular arrays of air ducts 401 in the sidewall of the closed inner liner 4. A sloping surface is provided at the front of the closed inner liner 4, forming a 15-degree angle with the vertical surface. A torsion channel is also provided above each air duct 401, and a horizontal column 5 is movably installed in each torsion channel. The rear end of the horizontal column 5 is connected to the torsion mechanism and the elastic contraction mechanism. A cover plate 7 is movably installed at the front end of the horizontal column 5, and the cover plate 7 is hinged to the end of the horizontal column 5 via a hinge frame 701. The cover plate 7 can only be torsion in one direction relative to the axis of the horizontal column 5.

[0033] In this embodiment, when the vibration of the exhaust duct system is transmitted to the plastic cylinder 1, the plastic cylinder 1 can absorb the vibration, thereby reducing the noise of the entire exhaust duct. This also prevents noise from entering other rooms along the metal exhaust duct. The horizontal column 5 and the cover 7 can rotate 180 degrees up and down. The cover 7 can fall down to cover the front end of the air duct 401. At this time, air can only flow from the rear end to the front end of the air duct 401, but air cannot flow from the front end to the rear end of the air duct 401. The cover 7 falling down to cover the front end of the air duct 401 also prevents air from flowing from the rear end to the front end. The backflow function prevents harmful gases inside the exhaust duct from flowing back into the laboratory, providing a certain level of safety. If the duct 401 needs to deliver a large volume of air, the horizontal column 5 and the cover 7 rotate 180 degrees upwards, and the cover 7 cannot be twisted or tilted downwards relative to the horizontal column 5, thus allowing the opening of the duct 401 to be fully opened. In this state, the duct 401 allows for rapid airflow. Under the condition of delivering a large volume of air, the gas pressure inside the duct 401 is relatively high, and the gas inside the exhaust duct will not flow back.

[0034] In further embodiments of the present invention, such as Figure 7-9 As shown, the hinge frame 701 is divided into a limiting hinge block and an abutting hinge block. The limiting hinge block is fixed on the side wall of the hinge frame 701, and the abutting hinge block is fixed on the end of the horizontal column 5. The side of the cover plate 7 facing the limiting hinge block is facing upward so that the side wall of the cover plate 7 is parallel to the axis of the horizontal column 5.

[0035] In this embodiment, when the side of the cover plate 7 facing the limiting hinge block is facing upward, the cover plate 7 can be laid flat. When the side of the cover plate 7 facing the limiting hinge block is facing downward, the cover plate 7 can rotate and tilt downward by its own gravity, thereby blocking the front opening of the air duct 401.

[0036] In further embodiments of the present invention, such as Figure 7-9 As shown, the cover plate 7 is composed of a double-layer structure of a lead metal plate and a rubber pad, with the rubber pad disposed on the side facing the hinge frame 701.

[0037] In this embodiment, the rubber pad layer has better airtightness when it is attached to the port of air duct 401.

[0038] In further embodiments of the present invention, such as Figure 5-6As shown, the torsion mechanism includes a square column 501 at the rear end of the horizontal column 5. A driven gear 502 is fitted on the outer side of the square column 501. The center of the driven gear 502 is provided with a square hole that matches the cross-section of the square column 501. A support rod 6 is provided on one side of the horizontal column 5. The support rod 6 is fixed to the rear side wall of the closed inner liner 4. A tube shaft 601 is provided in the middle of the support rod 6. The tube shaft 601 and the driven gear 502 are rotatably connected. The square column 501 passes through the middle of the tube shaft 601. A drive gear 503 is provided on one side of the driven gear 502. The drive gear 503 and the driven gear 502 mesh with each other. The drive gear 503 is mounted on the output shaft of the steering motor 504. The steering motor 504 is fixed to the rear side wall of the closed inner liner 4.

[0039] In this embodiment, the steering motor 504 drives the driven gear 502 to rotate through the drive gear 503. The square column 501 and the horizontal column 5 can rotate 180 degrees synchronously with the driven gear 502. During the synchronous rotation of the square column 501 and the driven gear 502, the square column 501 can also be inserted into the square hole inside the driven gear 502.

[0040] In further embodiments of the present invention, such as Figure 5-6 As shown, the elastic contraction mechanism includes an elastic piece 602 at the end of the support rod 6, and a return spring 603 is provided on the side wall of the elastic piece 602. The return spring 603 is connected to the end of the square column 501.

[0041] In this embodiment, the return spring 603 always pulls the square column 501, so the square column 501 can always maintain the elastic force of being pushed back, which allows the cover plate 7 to fit against the slope surface of the closed inner liner 4.

[0042] In further embodiments of the present invention, such as Figure 1-5 As shown, the lifting mechanism includes a lifting guide rail 2, which is fixed to the ceiling of the building. Two load-bearing sliders are slidably mounted on the lifting guide rail 2. The two load-bearing sliders are respectively connected to the translation mechanism. A translation hinge block 206 is provided at the bottom of the load-bearing slider. A wrapping frame 202 is wrapped around the outer wall of the plastic cylinder 1. A lifting hinge block 207 is provided at the top of the wrapping frame 202. The lifting hinge block 207 and the translation hinge block 206 are connected by a lifting rod 201.

[0043] In this embodiment, when the two load-bearing sliders expand to both sides along the hoisting guide rail 2, the angle of the lifting rod 201 begins to twist and flatten. At this time, the height of the packaging frame 202 and the plastic cylinder 1 will be raised. If large equipment needs to pass through indoors, this will raise the height of the plastic cylinder 1, which can provide a path for the large equipment, allowing the large equipment to pass under the plastic cylinder 1.

[0044] In further embodiments of the present invention, such as Figure 1-5 As shown, the translation mechanism includes two stepper motors 203, which are fixed to the ceiling of the building. A threaded rod 204 is provided on the output shaft of the stepper motor 203, and a nut sleeve 205 is provided on the side wall of the load-bearing slider, which is fitted onto the threaded rod 204.

[0045] In this embodiment, when the stepper motor 203 drives the threaded rod 204 to rotate, the nut sleeve 205 slides and translates along the threaded rod 204, which can apply translational propulsion power to the load-bearing slider.

[0046] It should be noted that, for the sake of simplicity, the foregoing embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to the present invention. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0047] It should be understood that the disclosed apparatus can be implemented in other ways, given the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of units described above may be implemented in other ways in practice. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; indirect coupling or communication connections between devices or units may be telecommunications or other forms.

[0048] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0049] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of the present invention according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of the present invention. These technical solutions also fall within the scope of protection of the present invention.

Claims

1. A silent anti-fall cylinder for kitchen exhaust ducts, comprising a plastic cylinder (1), characterized in that: A lifting mechanism is provided above the plastic cylinder (1), and plastic corrugated pipes (3) are provided at both the front and rear ends of the plastic cylinder (1). The plastic corrugated pipes (3) are connected to the opening of the ventilation duct. A closed inner liner (4) is provided inside the plastic cylinder (1), and a wind resistance mechanism is provided inside the closed inner liner (4). The wind resistance mechanism includes four air ducts (401) arranged in a rectangular array in the side wall of the closed inner liner (4). The front of the closed inner liner (4) is provided with a sloping surface, which forms a 15-degree angle with the vertical surface. A torsion channel is also provided above each air duct (401). A horizontal column (5) is movably arranged in each torsion channel. The rear end of the horizontal column (5) is connected to the torsion mechanism and the elastic contraction mechanism. The front end of the crossbar (5) is movably provided with a cover plate (7), and the cover plate (7) and the end of the crossbar (5) are hinged together by a hinge frame (701). The cover plate (7) can only be twisted in one direction relative to the axis of the crossbar (5).

2. The anti-fall and silent cylinder for oil fume ducts according to claim 1, characterized in that: The hinge frame (701) is divided into a limiting hinge block and an abutting hinge block. The limiting hinge block is fixed on the side wall of the hinge frame (701), and the abutting hinge block is fixed on the end of the cross column (5). The side of the cover plate (7) facing the limiting hinge block is facing upward so that the side wall of the cover plate (7) is parallel to the axis of the cross column (5).

3. The anti-fall and silent cylinder for oil fume ducts according to claim 1, characterized in that: The cover plate (7) consists of a double-layer structure of a metal lead plate and a rubber pad, with the rubber pad disposed on the side facing the hinge frame (701).

4. The anti-fall and silent cylinder for oil fume ducts according to claim 1, characterized in that: The torsion mechanism includes a square column (501) at the rear end of the horizontal column (5). A driven gear (502) is fitted on the outer side of the square column (501). A square hole matching the cross-section of the square column (501) is provided in the center of the driven gear (502). A support rod (6) is provided on one side of the horizontal column (5). The support rod (6) is fixed on the rear side wall of the closed inner liner (4). A tube shaft (601) is provided in the middle of the support rod (6). The tube shaft (601) and the driven gear (502) are rotatably connected. The square column (501) passes through the middle of the tube shaft (601). A drive gear (503) is provided on one side of the driven gear (502). The drive gear (503) and the driven gear (502) mesh with each other. The drive gear (503) is mounted on the output shaft of the steering motor (504). The steering motor (504) is fixed on the rear side wall of the closed inner liner (4).

5. The anti-fall and silent cylinder for oil fume ducts according to claim 4, characterized in that: The elastic contraction mechanism includes an elastic plate (602) at the end of the support rod (6), and a return spring (603) is provided on the side wall of the elastic plate (602), and the return spring (603) is connected to the end of the square column (501).

6. The anti-fall and silent cylinder for oil fume ducts according to claim 1, characterized in that: The lifting mechanism includes a lifting guide rail (2), which is fixed to the ceiling of the building. Two load-bearing sliders are slidably arranged on the lifting guide rail (2). The two load-bearing sliders are respectively connected to the translation mechanism. A translation hinge block (206) is provided at the bottom of the load-bearing slider. A wrapping frame (202) is wrapped on the outer wall of the plastic cylinder (1). A lifting hinge block (207) is provided at the top of the wrapping frame (202). The lifting hinge block (207) and the translation hinge block (206) are connected by a lifting rod (201).

7. The anti-fall and silent cylinder for oil fume ducts according to claim 6, characterized in that: The translation mechanism includes two stepper motors (203), which are fixed to the ceiling of the building. A threaded rod (204) is provided on the output shaft of the stepper motor (203), and a nut sleeve (205) is provided on the side wall of the load-bearing slider. The nut sleeve (205) is fitted onto the threaded rod (204).

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