Inlet cover of smoke exhaust pipeline

Abstract

The utility model discloses a smoke exhaust pipeline inlet cover and belongs to the technical field of lampblack treatment equipment. An inner edge is arranged at the lower end of the cover body, and a filter screen layer is arranged in the cover body, is placed on the inner edge and is made of a porous flame-retardant material. And the filter screen layer is fixedly connected with the cover body through a plurality of screws. Protrusions are arranged on the inner wall of the cover body, L-shaped sliding grooves are formed in the outer wall of the inlet end of the smoke exhaust pipeline, and the protrusions and the L-shaped sliding grooves are correspondingly connected in a sliding and limiting mode. Or the two semicircular hoops are enclosed to form a circular ring shape and then sleeve the outer side of the smoke exhaust pipeline, two ends of the semicircular hoops are connected through bolts, the bolts are connected with one ends of the springs, and the other ends of the springs are connected with the through holes in the outer wall of the cover body in a hooking manner. According to the utility model, oil dirt accumulation and back drop pollution on the pipe wall are avoided, the maintenance period of the smoke exhaust system is obviously prolonged, the ignition risk of combustible oil dirt in the pipeline is eliminated, the use safety is ensured while the maintenance efficiency of equipment is improved, and the functionality and reliability of the smoke exhaust system are comprehensively optimized.

Description

Technical Field

[0001] This utility model relates to an exhaust pipe inlet cover, belonging to the technical field of oil fume treatment equipment. Background Technology

[0002] During the operation of a barbecue restaurant, the exhaust system needs to continuously handle high-temperature grease fumes and combustion exhaust gases. Current technology generally uses a perforated cover plate structure at the opening of the exhaust duct directly opposite the grill pan. This design has the following technical drawbacks:

[0003] 1. Pollution problems caused by lack of oil fume purification

[0004] The current through-hole cover structure only has basic airflow guidance function and does not integrate a filter module. Oil fume particles enter the pipe directly without treatment, and after long-term operation, they will form a thick grease buildup on the pipe wall. Such deposits not only reduce the efficiency of smoke extraction, but may also drip back onto the baking tray area due to gravity, causing food contamination and deteriorating the dining environment.

[0005] 2. Fire safety hazards

[0006] During charcoal grilling, dripping grease can cause deflagration, at which point the manhole cover fails to prevent the flame from being drawn in. Flammable oil residue adhering to the inner wall of the pipe can easily ignite a flue fire upon contact with the flame. The existing design lacks both a flame-blocking mechanism and flame-retardant materials, posing a significant safety risk. Summary of the Invention

[0007] To address the problems existing in the background art, this utility model provides a smoke exhaust pipe inlet cover.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a smoke exhaust pipe inlet cover, comprising a cover body and a filter layer; the cover body is a ring structure, the lower end face of the cover body is provided with an inner edge, the filter layer is installed inside the cover body, the filter layer is placed on the inner edge, and the cover body and the smoke exhaust pipe inlet end are detachably and fixedly connected by a connecting unit.

[0009] Furthermore, the filter layer is made of a porous flame-retardant material.

[0010] Furthermore, the filter layer is fixedly connected to the cover body by a plurality of screws, which are arranged circumferentially along the cover body, and each screw is threaded into the side wall of the cover body.

[0011] Furthermore, the connecting unit includes multiple protrusions and multiple L-shaped grooves; the inner wall of the cover body is provided with multiple protrusions, and the outer wall of the smoke exhaust pipe inlet end is provided with multiple L-shaped grooves, and the multiple protrusions and multiple L-shaped grooves are slidably limited and connected in a one-to-one correspondence.

[0012] Furthermore, the connecting unit includes two semi-circular clamps, two bolts, and two springs; the two semi-circular clamps are closed and enclosed in a ring shape and fitted onto the outside of the exhaust pipe, and the two ends of the two semi-circular clamps are respectively connected by corresponding bolts. Each bolt is respectively limited and connected to one end of the corresponding spring. The outer wall of the cover body is provided with two through holes, and the other ends of the two springs are respectively hooked and connected to the corresponding through holes.

[0013] Furthermore, the outer wall of the cover body is provided with a raised edge, and the other end of each spring is hooked and connected to the raised edge.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention employs a filter layer constructed from flame-retardant oil-absorbing materials such as nickel-titanium alloy at the inlet of the exhaust duct to form a physical filtration barrier. Based on airflow guidance, it achieves efficient interception of oil fume particles, preventing oil buildup and backflow pollution on the pipe walls, and significantly extending the maintenance cycle of the exhaust system. The flame-retardant material, combined with a sealed installation structure, effectively blocks open flames from charcoal fires, eliminating the risk of ignition from flammable oil stains inside the pipe. Simultaneously, the modular quick-release design (L-shaped sliding groove connection or spring clamp fixation) balances operational convenience with structural stability, and the specially designed spring hook structure further simplifies the installation process, improving equipment maintenance efficiency while ensuring safety, comprehensively optimizing the functionality and reliability of the exhaust system. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram showing the connection between the cover body and the filter layer;

[0018] Figure 3 This is a structural schematic diagram of the cover body. Detailed Implementation

[0019] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0020] A smoke exhaust pipe inlet cover includes a cover body 1 and a filter layer 2; the cover body 1 is a ring structure, the lower end face of the cover body 1 is provided with an inner edge 8, the filter layer 2 is installed inside the cover body 1, the filter layer 2 is placed on the inner edge 8, and the cover body 1 is detachably and fixedly connected to the smoke exhaust pipe inlet end through a connecting unit.

[0021] When in use, insert the gap at the inlet end of the exhaust pipe into the cover body 1 and fix the two together. Press the filter layer 2 through the exhaust pipe to prevent the filter layer 2 from moving during use.

[0022] Furthermore, the filter layer 2 is made of a porous flame-retardant material, such as a nickel-titanium alloy, which has strong oil absorption capacity and will not drip oil during use, while also having good flame-retardant effect.

[0023] Furthermore, the filter layer 2 is fixedly connected to the cover body 1 by a plurality of screws 3. The plurality of screws 3 are evenly distributed along the circumference of the cover body 1, and each screw 3 is threaded into the side wall of the cover body 1. The position of the filter layer 2 is further defined by the plurality of screws 3, thereby enhancing the performance.

[0024] Furthermore, the connecting unit includes multiple protrusions and multiple L-shaped grooves; the inner wall of the cover body 1 is provided with multiple protrusions evenly distributed along its circumference (not shown in the attached figure), and the outer wall of the smoke exhaust pipe inlet end is provided with multiple L-shaped grooves. The multiple protrusions and multiple L-shaped grooves are connected in a one-to-one sliding limiting manner. In use, the protrusions are first aligned with the vertical section of the L-shaped groove and inserted, and then the protrusions are screwed into the horizontal section to achieve position limitation.

[0025] Example 2:

[0026] The difference between this embodiment and Embodiment 1 is that:

[0027] The connecting unit includes two semi-circular clamps 5, two bolts 6, and two springs 7. The two semi-circular clamps 5 are closed and enclosed in a circular shape and fitted onto the outside of the exhaust pipe. The two ends of the two semi-circular clamps 5 are connected by corresponding bolts 6. Each bolt 6 is fixedly connected to one end of the corresponding spring 7. The outer wall of the cover body 1 is provided with two through holes that penetrate its wall thickness along its circumference. The other ends of the two springs 7 are hooked and connected to the corresponding through holes.

[0028] This connection method avoids the situation in Example 1 where the connection cannot be made by hand due to slippage, making installation more convenient.

[0029] The outer wall of the cover body 1 is provided with a raised edge 4 along its circumference, and the other end of each spring 7 is hooked and connected to the raised edge 4.

[0030] Eliminating the need to align the springs with the through holes makes installation much faster.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of the equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A smoke exhaust duct inlet cover, characterized in that: It includes a cover body (1) and a filter layer (2); the cover body (1) is a ring structure, the lower end face of the cover body (1) is provided with an inner edge (8), the filter layer (2) is installed inside the cover body (1), the filter layer (2) is placed on the inner edge (8), and the cover body (1) is detachably and fixedly connected to the inlet end of the exhaust pipe through a connecting unit.

2. The smoke exhaust duct inlet cover according to claim 1, characterized in that: The filter layer (2) is a porous flame-retardant material.

3. The smoke exhaust duct inlet cover according to claim 1, characterized in that: The filter layer (2) is fixedly connected to the cover body (1) by a plurality of screws (3). The plurality of screws (3) are arranged along the circumference of the cover body (1), and each screw (3) is threaded into the side wall of the cover body (1).

4. A smoke exhaust duct inlet cover according to claim 2 or 3, characterized in that: The connecting unit includes multiple protrusions and multiple L-shaped grooves; the inner wall of the cover body (1) is provided with multiple protrusions, and the outer wall of the smoke exhaust pipe inlet end is provided with multiple L-shaped grooves. The multiple protrusions and multiple L-shaped grooves are connected in a sliding limit manner in a one-to-one correspondence.

5. A smoke exhaust duct inlet cover according to claim 2 or 3, characterized in that: The connecting unit includes two semi-circular clamps (5), two bolts (6), and two springs (7); the two semi-circular clamps (5) are closed and enclosed in a circular shape and then fitted onto the outside of the exhaust pipe, and the two ends of the two semi-circular clamps (5) are respectively connected by corresponding bolts (6), and each bolt (6) is respectively limited and connected to one end of the corresponding spring (7). The outer wall of the cover body (1) is provided with two through holes, and the other ends of the two springs (7) are respectively hooked and connected to the corresponding through holes.

6. The smoke exhaust duct inlet cover according to claim 5, characterized in that: The outer wall of the cover body (1) is provided with a raised edge (4), and the other end of each spring (7) is hooked to the raised edge (4).

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