Fireproof filtering type smoke exhaust pipe for dining and barbecue table

Abstract

The utility model relates to a kind of fireproof filtering type smoke exhaust pipe for catering barbecue table, including smoke pipe body, the smoke suction mouth of the bottom end of smoke pipe body is with flared cover, fire prevention mechanism is set in the upper half of smoke exhaust pipe body, fire prevention mechanism includes fire prevention flap, flap pivot, flap pivot is placed in the smoke exhaust pipe body, fire prevention flap is fixedly installed on flap pivot, horizontal limit stop corresponding with fire prevention flap is provided in the inner wall of smoke pipe body, cylindrical stainless steel wire mesh filter is installed in the flared cover of the bottom end of smoke pipe body.The fireproof filtering type smoke exhaust pipe for catering barbecue table has the function of "fire prevention", that is: it can prevent the smoke or flame of superhigh temperature from entering flue system through the smoke exhaust pipe, so as to avoid the damage of high temperature to flue system;Smoke filtering function, that is: it can filter the inhaled smoke, and can intercept most of the smoke oil in the smoke, so as to prevent too much smoke oil from entering flue system, thereby prolonging the cleaning and maintenance period of flue system.

Description

Technical Field

[0001] This utility model relates to the field of kitchen exhaust pipe technology, and in particular to a fireproof and filter-type exhaust pipe for barbecue tables. Background Technology

[0002] Exhaust pipes are typically installed above indoor barbecue tables to promptly remove fumes generated during grilling, maintaining a fresh dining environment. Currently, these exhaust pipes on the market have the following drawbacks: 1. They lack fire resistance; extremely high-temperature fumes and even flames can easily enter the negative-pressure flue system through the exhaust pipe, scorching the inner walls. 2. They lack smoke filtration; the large amount of fumes generated during grilling continuously enters the flue system through the exhaust pipe, quickly causing the flue system to become greasy and smudged, weakening suction and even causing blockages, resulting in a short cleaning and maintenance cycle. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a fireproof filter exhaust pipe for a barbecue table in order to overcome the defects and deficiencies of the existing technology and products as described in the background art.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: a fireproof filter exhaust pipe for a catering barbecue table, including a pipe body, a smoke inlet at the bottom of the pipe body with an expanding mask, a fireproof mechanism in the upper half of the pipe body, the fireproof mechanism including a fireproof flap and a flap pivot, the flap pivot passing through the pipe body, with its two ends passing through the pipe wall of the pipe body respectively, a pivot torsion spring installed at one end of the flap pivot through the pipe wall of the pipe body, and a hook seat installed at the other end, with a spring hook installed on the hook seat, the fireproof flap being fixedly installed on the flap pivot, a horizontal limit stop corresponding to the fireproof flap being provided on the inner wall of the pipe body, and a through hole being opened in the pipe wall of the pipe body. A spring pin mounting seat is welded into the through hole, and a spring pin is installed in the spring pin mounting seat. The front end of the spring pin protrudes from the outer end of the spring pin mounting seat and is located on one side of the hook plate seat. The spring hook plate on the hook plate seat can hook the front end of the pin. When the spring hook plate hooks the front end of the pin, the flip plate shaft overcomes the torsion of the shaft torsion spring, so that the fireproof flip plate is in an upright state. The rear part of the spring pin shaft is located inside the smoke pipe body and is fixedly connected to a thermal expansion rod. The thermal expansion rod is parallel to the pin shaft, and the end of the thermal expansion rod that is in the same direction as the front end of the pin shaft abuts against the inner wall of the smoke pipe body. A cylindrical stainless steel wire mesh filter is installed inside the expansion mask at the bottom of the smoke pipe body.

[0005] Furthermore, the smoke pipe body is formed by connecting an upper pipe body and a lower pipe body. The expansion mask and stainless steel wire mesh filter are located at the bottom of the lower pipe body. The fireproof mechanism is set on the upper pipe body. An annular groove is formed on the lower outer wall surface of the upper pipe body. The inner wall surface of the lower pipe body is in close contact with the lower outer wall surface of the upper pipe body. At the same time, at least one clamping screw corresponding to the annular groove on the outer wall surface of the upper pipe body is provided on the pipe wall of the lower pipe body.

[0006] Preferably, a pair of lugs are installed on the outer wall of the lower tube.

[0007] Furthermore, a pair of spring clips are installed inside the expander mask. The upper end of the spring clips is fixed to the inner wall of the expander mask, and the lower end of the spring clips forms an upward hook. The upper edge of the stainless steel wire mesh filter abuts against the inner wall of the expander mask, and the bottom of the stainless steel wire mesh filter is symmetrically supported by the hooks of the aforementioned pair of spring clips.

[0008] Preferably, a hand lever is installed on the flap shaft of the fireproof mechanism.

[0009] The beneficial effects of this utility model are as follows: Compared with the existing conventional exhaust pipes for barbecue tables, this utility model has the following features: First, a "fireproof" function, that is, it can prevent ultra-high temperature smoke or flames from entering the flue system through the exhaust pipe, thereby avoiding high temperature damage to the flue system; Second, a smoke filtration function, that is, it can effectively filter the inhaled smoke, intercept most of the grease in the smoke, prevent excessive grease from entering the flue system, thereby extending the cleaning and maintenance cycle of the flue system. Attached Figure Description

[0010] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0011] Figure 1 , Figure 2 All of these are schematic diagrams of the main structure of this utility model. Figure 2 The image shows the state of the smoke tube body after it has been extended. Figure 3 for Figure 1 or Figure 2 An enlarged structural diagram of the portion indicated by label 3 in the attached figure; Figure 4 This is a schematic diagram of the fire-resistant mechanism of this utility model in a fire-resistant state; Figure 5 A schematic diagram of the structure when the hook seat of the fireproof mechanism is turned so that the spring hook catches the front end of the pin (the arrow in the figure indicates the turning direction). Figure 6 , Figure 7 All are top view structural schematic diagrams of the fire prevention mechanism of this utility model. Figure 6This shows the state when the fireproof flap is upright and the smoke pipe body is open; Figure 7 This displays the state of the flue body being blocked (fireproof). Figure 8 This is a structural schematic diagram of the expanded mask, stainless steel wire mesh filter, etc. of this utility model (partial cross-section, the arrows in the figure indicate the direction of the smoke).

[0012] In the diagram: 1. Smoke pipe body; 1-1. Upper pipe body; 1-1-1. Annular groove; 1-2. Lower pipe body; 1-2-1. Clamping screw; 1-2-2. Holding ear; 2. Expansion mask; 3. Fireproof mechanism; 3-1. Fireproof flap; 3-2. Flap pivot; 3-3. Pivot torsion spring; 3-4. Hook plate seat; 3-5. Spring hook plate; 3-6. Horizontal limit stop; 3-7. Spring pin mounting seat; 3-8. Spring pin; 3-8-1. Pin shaft; 3-9. Thermal expansion rod; 3-10. Hand lever; 4. Stainless steel wire mesh filter; 5. Spring clip. Detailed Implementation

[0013] A fireproof filter exhaust pipe for barbecue tables, such as Figures 1 to 7 As shown, it includes a smoke pipe body 1, with a smoke inlet at the bottom of the smoke pipe body 1 equipped with a widening mask 2. A fireproof mechanism 3 is provided in the upper half of the smoke pipe body 1. The fireproof mechanism includes a fireproof flap 3-1 and a flap pivot 3-2. The flap pivot 3-2 passes through the smoke pipe body 1, with both ends protruding from the pipe wall of the smoke pipe body 1. A pivot torsion spring 3-3 is installed at one end of the flap pivot 3-2 through the pipe wall of the smoke pipe body 1, and a hook seat 3-4 is installed at the other end. A spring hook 3-5 is installed on the hook seat 3-4. The fireproof flap 3-1 is fixedly installed on the flap pivot 3-2. A horizontal limit stop 3-6 corresponding to the fireproof flap 3-1 is provided on the inner wall of the smoke pipe body 1. A through hole is opened in the pipe wall of the smoke pipe body 1, and a spring pin mounting seat 3-7 is welded into the through hole. A spring pin 3- is installed in the spring pin mounting seat 3-7. 8. The front end of the pin shaft 3-8-1 of the spring pin 3-8 protrudes from the outer end of the spring pin mounting seat 3-7 and is located on one side of the hook seat 3-4. The spring hook 3-5 on the hook seat 3-4 can hook the front end of the pin shaft 3-8-1. When the spring hook 3-5 hooks the front end of the pin shaft 3-8-1, the flip plate shaft 3-2 overcomes the torque of the shaft torsion spring 3-3, so that the fireproof flip plate 3-1 is in an upright state. The rear part of the pin shaft 3-8-1 of the spring pin 3-8 is located inside the smoke pipe body 1 and is fixedly connected to a thermal expansion rod 3-9. The thermal expansion rod 3-9 is parallel to the pin shaft 3-8-1. The end of the thermal expansion rod 3-9 that is in the same direction as the front end of the pin shaft 3-8-1 abuts against the inner wall of the smoke pipe body 1. A cylindrical stainless steel wire mesh filter 4 is installed in the expansion mask 2 at the bottom of the smoke pipe body 1.

[0014] Under normal use, the spring hook 3-5 of the fireproof mechanism 3 of the fireproof filter exhaust pipe hooks the front end of the pin 3-8-1, and the flap rotating shaft 3-2 overcomes the torque of the rotating shaft torsion spring 3-3 to keep the fireproof flap 3-1 in an upright position. At this time, the inside of the exhaust pipe body 1 is open. However, when ultra-high temperature flue gas or flames exceeding the temperature limit enter the exhaust pipe body 1, the thermal expansion rod 3-9 expands and elongates under high temperature, causing the front end of the pin 3-8-1 of the spring pin 3-8 to retract. This causes the spring hook 3-5 to disengage from the pin 3-8-1, and the torque of the rotating shaft torsion spring 3-3 causes the flap rotating shaft 3-2 to rotate immediately. When the fireproof flap 3-1 flips to the horizontal position, it is blocked by the horizontal limit stop 3-6 on the inner wall of the exhaust pipe body 1. Thus, the fireproof flap 3-1 forms a blockage inside the exhaust pipe body 1, blocking the flue gas and preventing high temperature flue gas from entering the flue system and causing adverse consequences. The thermal expansion rod 3-9 is made of a commonly used metal-based expansion alloy. When the environment returns to normal, the thermal expansion rod 3-9 also returns to its original state. The pin 3-8-1 of the spring pin 3-8 returns to its original position under the action of its return spring, and the front end of the pin 3-8-1 is exposed again. At this time, the hook plate seat 3-4 can be manually rotated so that the spring hook plate 3-5 on the hook plate seat 3-4 hooks the front end of the pin 3-8-1 again (when the outer edge of the spring hook plate 3-5 touches the front end of the pin 3-8-1, it will be squeezed inward. When the outer edge of the spring hook plate 3-5 passes the pin 3-8-1, the spring hook plate 3-5 pops outward under the action of its return spring and hooks the pin 3-8-1). This allows the fireproof flap 3-1 to stand up again, and the smoke pipe body 1 returns to the conductive state for continued use.

[0015] The stainless steel wire mesh filter 4 installed inside the vent at the bottom of the flue body 1 effectively filters the inhaled smoke, trapping most of the tar and preventing excessive tar from entering the flue system. The stainless steel wire mesh filter 4 is a common and commercially available product.

[0016] Currently, conventional exhaust pipes of this type on the market do not have the function of being stretchable and extendable. Therefore, when connecting to the flue system interface, a corrugated pipe needs to be installed separately, relying on the extensibility of the corrugated pipe to adjust the height of the smoke inlet at the bottom of the exhaust pipe. Therefore, in this example, the exhaust pipe body 1 is formed by connecting an upper pipe body 1-1 and a lower pipe body 1-2. The expansion mask 2 and the stainless steel wire mesh filter 4 are located at the bottom of the lower pipe body 1-2, and the fireproof mechanism 3 is set on the upper pipe body 1-1. An annular groove 1-1-1 is formed on the lower outer wall surface of the upper pipe body 1-1. The inner wall surface of the lower pipe body 1-2 is tightly fitted with the lower outer wall surface of the upper pipe body 1-1. At the same time, at least one clamping screw 1-2-1 corresponding to the annular groove 1-1-1 on the outer wall surface of the upper pipe body 1-1 is provided on the pipe wall of the lower pipe body 1-2. In this way, the exhaust pipe body 1 has the function of being stretchable and extendable, and can be adjusted as needed. The friction formed by the tight fit between the inner and outer walls of the upper and lower tubes, along with the engagement of the annular groove 1-1-1 and the clamping screw 1-2-1, ensures the stability of the upper and lower tubes after expansion and contraction adjustment.

[0017] To facilitate the extension and retraction adjustment of the pipe body 1, a pair of handles 1-2-2 are installed on the outer wall of the lower pipe body 1-2. When pulling down or lifting the lower pipe body 1-2, the handles 1-2-2 can be held with both hands for operation.

[0018] To facilitate the disassembly and assembly of the stainless steel wire mesh filter 4 inside the mask 2 for routine cleaning and maintenance, in this example, a pair of spring clips 5 are installed inside the mask 2. The upper end of the spring clips 5 is fixed to the inner wall of the mask 2, and the lower end of the spring clips 5 forms an upward hook. The upper edge of the stainless steel wire mesh filter 4 abuts against the inner wall of the mask 2, and the bottom of the stainless steel wire mesh filter 4 is symmetrically supported by the hooks of the pair of spring clips 5.

[0019] To facilitate the rotation of the hook plate seat 3-4, a hand lever 3-10 is installed on the flip plate shaft 3-2 of the fireproof mechanism 3.

[0020] The above embodiments are only used to explain the present utility model and are not intended to limit the protection of the present utility model. Any non-substantial modifications made based on the essential solution of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A fireproof and filter-type exhaust pipe for a barbecue table, comprising a pipe body (1), wherein the exhaust port at the bottom of the pipe body (1) is equipped with a wide-mouth mask (2), characterized in that: A fireproof mechanism (3) is provided in the upper half of the flue body (1). The fireproof mechanism includes a fireproof flap (3-1) and a flap shaft (3-2). The flap shaft (3-2) is inserted into the flue body (1), and its two ends protrude from the wall of the flue body (1). A shaft torsion spring (3-3) is installed at one end of the flap shaft (3-2) through the wall of the flue body (1), and a hook seat (3-4) is installed at the other end. A spring hook (3-5) is installed on the hook seat (3-4). The fireproof flap (3-1) is fixedly installed on the flap shaft (3-2). A horizontal limit stop (3-6) corresponding to the fireproof flap (3-1) is provided on the inner wall of the flue body (1). A through hole is opened on the wall of the flue body (1), and a spring pin mounting seat (3-7) is welded into the through hole. A spring pin (3-5) is installed in the spring pin mounting seat (3-7). 8) The front end of the spring pin (3-8-1) protrudes from the outer end of the spring pin mounting seat (3-7) and is located on one side of the hook seat (3-4). The spring hook (3-5) on the hook seat (3-4) can hook the front end of the pin (3-8-1). When the spring hook (3-5) hooks the front end of the pin (3-8-1), the flip plate shaft (3-2) overcomes the shaft torsion spring (3-8-1). -3) The torsional force makes the fireproof flap (3-1) stand upright. The rear part of the pin (3-8-1) of the spring pin (3-8) is located inside the smoke pipe body (1) and is fixedly connected to a thermal expansion rod (3-9). The thermal expansion rod (3-9) is parallel to the pin (3-8-1). The end of the thermal expansion rod (3-9) that is in the same direction as the front end of the pin (3-8-1) abuts against the inner wall of the smoke pipe body (1). A cylindrical stainless steel wire mesh filter (4) is installed inside the expansion mask (2) at the bottom end of the flue body (1).

2. The fireproof filter exhaust pipe for a barbecue table according to claim 1, characterized in that: The smoke pipe body (1) is formed by connecting an upper pipe body (1-1) and a lower pipe body (1-2). The expansion mask (2) and the stainless steel wire mesh filter (4) are located at the bottom of the lower pipe body (1-2). The fireproof mechanism (3) is set on the upper pipe body (1-1). An annular groove (1-1-1) is formed on the lower outer wall surface of the upper pipe body (1-1). The inner wall surface of the lower pipe body (1-2) is tightly fitted with the lower outer wall surface of the upper pipe body (1-1). At the same time, at least one clamping screw (1-2-1) corresponding to the annular groove (1-1-1) on the outer wall surface of the upper pipe body (1-1) is provided on the pipe wall of the lower pipe body (1-2).

3. The fireproof filter exhaust pipe for a barbecue table according to claim 2, characterized in that: A pair of lugs (1-2-2) are installed on the outer wall of the lower tube (1-2).

4. The fireproof filter exhaust pipe for a barbecue table according to claim 1 or 2, characterized in that: A pair of spring clips (5) are installed inside the expanded mask (2). The upper end of the spring clips (5) is fixed to the inner wall of the expanded mask (2), and the lower end of the spring clips (5) forms an upward hook. The upper edge of the stainless steel wire mesh filter (4) abuts against the inner wall of the expanded mask (2), and the bottom of the stainless steel wire mesh filter (4) is symmetrically supported by the hooks of the pair of spring clips (5).

5. The fireproof filter exhaust pipe for a barbecue table according to claim 1, characterized in that: A hand lever (3-10) is installed on the flap shaft (3-2) of the fire prevention mechanism (3).

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