Smoke exhaust hood connecting pipe capable of preventing wind from flowing backwards

Abstract

The utility model discloses a smoke exhaust hood connecting pipe capable of preventing wind from flowing backwards, and relates to the technical field of smoke exhaust hood installation. The device comprises a connecting pipe body; the outer wall of the anti-backflow device is fixedly connected with the inner wall of the connecting pipe body; the outer wall of the corrugated pipe is fixedly connected with the side wall of the connecting pipe body; the outer wall of the fixing device is rotationally connected with the inner wall of the connecting pipe body, by arranging the anti-backflow device, external wind and rain are prevented from entering the smoke exhaust hood through the connecting pipe, the external wind and rain are blocked through the flashing board and the inclined blades, and even if the flashing board and the inclined blades cannot completely block the wind and rain from entering, the smoke exhaust hood is prevented from being blocked. When the smoke exhaust hood is used, entering wind and rain can be guided to the bottom of the connecting pipe by the inclined blades, and the inclined pipe which is obliquely arranged further blocks follow-up wind and rain from moving under the gravity action of the wind and rain, so that the smoke exhaust hood is protected and prevented from being damaged, and the purpose of preventing wind from flowing backwards and entering the smoke exhaust hood is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of smoke exhaust hood installation, in particular to a smoke exhaust hood pipe which is wind-proof and can prevent backflow. Background Art

[0002] The smoke exhaust hood pipe is a component that connects the smoke exhaust hood to the smoke exhaust duct. It is usually made of metal materials such as stainless steel. Its function is to smoothly transport the oil smoke, exhaust gas, etc. collected by the smoke exhaust hood to the smoke exhaust duct or the external environment to keep the air in indoor places such as the kitchen clean. When installing the smoke exhaust hood, the installation quality and sealing performance of the pipe are very important to ensure the normal operation of the smoke exhaust system.

[0003] In the prior art, when the pipe outlet is on the outer wall of the building, when the external environment is harsh, such as a windy and rainy environment, wind and rain can easily enter the smoke exhaust hood through the pipe. Since the smoke exhaust hood is often equipped with a fan to assist in exhaust, rainwater entering the fan can easily accelerate the aging of the fan or cause the fan to short-circuit, thereby causing the smoke exhaust hood to lose its overall smoke exhaust effect. Utility Model Content

[0004] In view of the deficiencies in the prior art, the technical solution adopted by the utility model to solve the technical problems is: a smoke exhaust hood pipe that prevents wind backflow, comprising: a pipe body; an anti-backflow device, the outer wall of the anti-backflow device is fixedly connected to the inner wall of the pipe body; a bellows, the outer wall of the bellows is fixedly connected to the side wall of the pipe body; a fixing device, the outer wall of the fixing device is rotatably connected to the inner wall of the pipe body.

[0005] Preferably, the anti-backflow device includes a positioning plate, an outer wall of the positioning plate is fixedly connected with a rain shield, an inner side wall of the positioning plate is fixedly connected with a fixing ring, a side of the fixing ring away from the positioning plate is fixedly connected with an inclined blade, an outer wall of the fixing ring is fixedly connected with a connecting ring, a side of the connecting ring away from the fixing ring is fixedly connected with an inclined tube, an outer wall of the inclined tube is fixedly connected to an outer wall of a connecting pipe body, one end of the inclined tube away from the connecting ring is fixedly connected to an outer wall of the corrugated pipe, and a side of the positioning plate away from the rain shield is fixedly connected to the outer wall of the connecting pipe body. By arranging the anti-backflow device, external wind and rain can be prevented from entering the smoke exhaust hood through the connecting pipe, thereby protecting the smoke exhaust hood and preventing the smoke exhaust hood from being damaged.

[0006] Preferably, the fixing device includes a rotating rod, the outer wall of the rotating rod is slidably connected to a pushing block through a threaded groove, and the threaded groove is opened in the wall of the rotating rod, and pressure blocks are slidably connected to two sides of the pushing block, and an arc plate is fixedly connected to the side of the pressure block away from the pushing block, the arc plate is rotatably connected to the taking-up body through a positioning shaft, and the outer wall of the positioning shaft is fixedly connected to the inner wall of the arc plate, the outer wall of the positioning shaft is rotatably connected to the inner wall of the taking-up body, the top of the pushing block is slidably connected to the inner wall of the taking-up body through a movable groove, and the movable groove is opened in the wall of the taking-up body, the outer wall of the rotating rod is rotatably connected to the inner wall of the taking-up body through the rotating groove, and the rotating groove is opened in the wall of the taking-up body, the outer wall of the rotating rod is rotatably connected to the inner wall of the positioning plate, and the inner wall of the pushing block is threadedly connected to the outer wall of the threaded groove, and the fixing device is provided to assist construction personnel in installation, and the fixing device applies pressure to the inside of the hole by expanding, thereby increasing the friction between the taking-up body and the hole to prevent accidental falling during installation.

[0007] The beneficial effects of the utility model are as follows:

[0008] 1. The utility model prevents external wind and rain from entering the exhaust hood through the pipe by arranging the anti-backflow device, thereby protecting the exhaust hood and preventing the exhaust hood from being damaged.

[0009] 2. The utility model assists construction workers in installation by providing a fixing device. After the connecting pipe is inserted into the hole in the building, the fixing device applies pressure to the inside of the hole by expanding, thereby increasing the friction between the connecting pipe and the hole to prevent accidental falling during installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is the front view of the utility model;

[0011] Figure 2 It is a cross-sectional view of the utility model;

[0012] Figure 3 It is a structural schematic diagram of the utility model anti-backflow device;

[0013] Figure 4 It is a structural schematic diagram of the fixing device of the utility model.

[0014] In the figure: 1. pipe body; 2. backflow prevention device; 3. bellows; 4. rotating groove; 5. fixing device; 6. movable groove; 21. positioning plate; 22. rain shield; 23. fixing ring; 24. tilting blade; 25. connecting ring; 26. tilting pipe; 51. rotating rod; 52. threaded groove; 53. pushing block; 54. pressure block; 55. arc plate; 56. positioning shaft. DETAILED DESCRIPTION

[0015] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific purposes.

[0016] Example: See Figure 1 - Figure 4 The utility model provides a technical solution: a smoke exhaust hood pipe that prevents wind backflow, comprising: a pipe body 1; an anti-backflow device 2, the outer wall of the anti-backflow device 2 is fixedly connected to the inner wall of the pipe body 1; a bellows 3, the outer wall of the bellows 3 is fixedly connected to the side wall of the pipe body 1; a fixing device 5, the outer wall of the fixing device 5 is rotatably connected to the inner wall of the pipe body 1.

[0017] The backflow prevention device 2 includes a positioning plate 21, the outer wall of the positioning plate 21 is fixedly connected to a rain shield 22, the inner side wall of the positioning plate 21 is fixedly connected to a fixing ring 23, the side of the fixing ring 23 away from the positioning plate 21 is fixedly connected to an inclined blade 24, the outer wall of the fixing ring 23 is fixedly connected to a connecting ring 25, the side of the connecting ring 25 away from the fixing ring 23 is fixedly connected to an inclined pipe 26, the outer wall of the inclined pipe 26 is fixedly connected to the outer wall of the pipe body 1, the end of the inclined pipe 26 away from the connecting ring 25 is fixedly connected to the outer wall of the corrugated pipe 3, the side of the positioning plate 21 away from the rain shield 22 is fixedly connected to the outer wall of the pipe body 1, when there is a strong wind and rainstorm outside, and the wind of the indoor smoke exhaust hood When the machine is working, the naturally falling rain is first blocked by the setting of the rain shield 22. The smoke exhausted to the outside will hit the inner curved position of the rain shield 22 after passing through the connecting ring 25 and the inclined blades 24, and will be guided to be discharged outward, thereby forming a wind wall to block the entry of wind and rain. When the fan inside the smoke exhaust hood is not working, the inclined blades 24 are used to further block the external wind and rain. Even if the rain shield 22 and the inclined blades 24 fail to completely block the entry of wind and rain, the incoming wind and rain will be guided by the inclined blades 24 to the bottom of the pipe, and the inclined pipe 26 set obliquely further blocks the movement of subsequent wind and rain through the gravity of wind and rain, preventing wind and rain from flowing back into the smoke exhaust hood.

[0018] The fixing device 5 includes a rotating rod 51, the outer wall of the rotating rod 51 is slidably connected to a pushing block 53 through a threaded groove 52, and the threaded groove 52 is opened in the wall of the rotating rod 51, and the two sides of the pushing block 53 are slidably connected to the pressure blocks 54, and the side of the pressure blocks 54 away from the pushing block 53 is fixedly connected to the arc plate 55, the arc plate 55 is rotatably connected to the connecting pipe body 1 through a positioning shaft 56, and the outer wall of the positioning shaft 56 is fixedly connected to the inner wall of the arc plate 55, and the outer wall of the positioning shaft 56 is rotatably connected to the inner wall of the connecting pipe body 1, the top of the pushing block 53 is slidably connected to the inner wall of the connecting pipe body 1 through a movable groove 6, and the movable groove 6 is opened in the wall of the connecting pipe body 1, the outer wall of the rotating rod 51 is rotatably connected to the inner wall of the connecting pipe body 1 through a rotating groove 4, and the rotating groove 4 is opened in the connecting pipe body 1, the outer wall of the rotating rod 51 is rotatably connected with the inner wall of the positioning disk 21, and the inner wall of the pushing block 53 is threadedly connected with the outer wall of the threaded groove 52. When the pipe body 1 enters the hole in the building wall, the construction personnel rotate the rotating rod 51 protrusion outside the positioning disk 21 to make the rotating rod 51 rotate in the rotating groove 4, thereby driving the threaded groove 52 on the rotating rod 51 to rotate, and then making the pushing block 53 slide on the rotating rod 51. During the sliding process, the pushing block 53 moves toward the direction of the corrugated pipe 3 and pushes the pressure blocks 54 on both sides to move. Due to the movement of the pressure blocks 54 and the positioning effect of the positioning shaft 56, the arc plate 55 is expanded to the outside of the pipe body 1, thereby fixing the position of the pipe, assisting in subsequent installation and fixing, and preventing accidental falling.

[0019] Working principle:

[0020] When in use, the construction workers drill holes in the building and insert the connecting pipe into the holes. When inserting, the end of the connecting pipe body 1 close to the bellows 3 is inserted into the hole until the positioning plate 21 of the anti-backflow device 2 fits with the wall surface of the outer wall of the building. At this time, the bellows 3 enters the interior of the building, and the connecting pipe body 1 is between the holes in the wall. At this time, the side of the bellows 3 away from the connecting pipe body 1 and the smoke exhaust port of the smoke exhaust hood are connected by tape, so that the smoke in the smoke exhaust hood can enter the connecting pipe body 1 through the bellows 3. When the smoke enters the connecting pipe body 1 through the bellows 3, it will enter the inclined pipe 26 and be discharged outside the building through the fixing ring 23 under the push of the subsequent smoke. When there is a strong wind and rainstorm outside and the indoor When the fan of the smoke exhaust hood is working, the naturally falling rain is first blocked by the setting of the rain shield 22. The smoke exhausted outward will hit the inner curved position of the rain shield 22 after passing through the connecting ring 25 and the inclined blades 24, and will be guided and discharged outward, thereby forming a wind wall to block the entry of wind and rain. When the fan inside the smoke exhaust hood is not working, the inclined blades 24 are used to further block the external wind and rain. Even if the rain shield 22 and the inclined blades 24 fail to completely block the entry of wind and rain, the entering wind and rain will be guided by the inclined blades 24 to the bottom of the pipe, and the inclined pipe 26 set obliquely further blocks the movement of subsequent wind and rain through the gravity of wind and rain, preventing wind and rain from backflowing into the smoke exhaust hood.

[0021] The fixing device 5 is provided to assist in fixing the pipe body 1 during installation. After the pipe body 1 enters the hole in the building wall, the construction personnel rotate the protrusion of the rotating rod 51 outside the positioning plate 21 to make the rotating rod 51 rotate in the rotating groove 4, thereby driving the threaded groove 52 on the rotating rod 51 to rotate. Due to the connection between the threaded groove 52 and the pushing block 53, the pushing block 53 is driven to have a tendency to rotate and slide. Since the protrusion above the pushing block 53 is limited by the movable groove 6, the rotation of the pushing block 53 is prevented, thereby causing the pushing block 53 to slide on the rotating rod 51. During the sliding process, the pushing block 53 moves toward the direction of the corrugated pipe 3 and pushes the pressure blocks 54 on both sides to move. Due to the movement of the pressure blocks 54 and the positioning effect of the positioning shaft 56, the arc plate 55 is expanded toward the outside of the pipe body 1, thereby squeezing the building wall. The friction force is increased by applying pressure, so that the construction personnel fix the pipe and prevent the pipe from accidentally falling when connecting the smoke exhaust hood.

[0022] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. Structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the field unless otherwise specified and limited.

Claims

1. A smoke exhaust hood pipe for preventing wind backflow, characterized in that: include: Take over the main body (1); An anti-backflow device (2), wherein the outer wall of the anti-backflow device (2) is fixedly connected to the inner wall of the pipe body (1); A bellows (3), the outer wall of the bellows (3) being fixedly connected to the side wall of the connecting pipe body (1); A fixing device (5), wherein the outer wall of the fixing device (5) is rotatably connected to the inner wall of the connecting pipe body (1); The backflow prevention device (2) comprises a positioning plate (21), the outer wall of the positioning plate (21) is fixedly connected to a rain shield (22), the inner side wall of the positioning plate (21) is fixedly connected to a fixing ring (23), a side of the fixing ring (23) away from the positioning plate (21) is fixedly connected to an inclined blade (24), the outer wall of the fixing ring (23) is fixedly connected to a connecting ring (25), and a side of the connecting ring (25) away from the fixing ring (23) is fixedly connected to an inclined tube (26).

2. The smoke exhaust hood pipe for preventing wind backflow according to claim 1, characterized in that: The outer wall of the inclined tube (26) is fixedly connected to the outer wall of the connecting pipe body (1); one end of the inclined tube (26) away from the connecting ring (25) is fixedly connected to the outer wall of the corrugated tube (3); and one side of the positioning plate (21) away from the rain shield (22) is fixedly connected to the outer wall of the connecting pipe body (1).

3. The smoke exhaust hood pipe for preventing wind backflow according to claim 1, characterized in that: The fixing device (5) comprises a rotating rod (51), the outer wall of the rotating rod (51) is slidably connected to a pushing block (53) via a threaded groove (52), and the threaded groove (52) is formed in the wall of the rotating rod (51), the two sides of the pushing block (53) are slidably connected to pressure blocks (54), and the side of the pressure block (54) away from the pushing block (53) is fixedly connected to an arc plate (55), the arc plate (55) is rotatably connected to the pipe body (1) via a positioning shaft (56), and the outer wall of the positioning shaft (56) is fixedly connected to the inner wall of the arc plate (55).

4. The smoke exhaust hood pipe for preventing wind backflow according to claim 3 is characterized in that: The outer wall of the positioning shaft (56) is rotatably connected to the inner wall of the connecting pipe body (1); the top of the pushing block (53) is slidably connected to the inner wall of the connecting pipe body (1) via a movable groove (6); the movable groove (6) is provided in the wall of the connecting pipe body (1); the outer wall of the rotating rod (51) is rotatably connected to the inner wall of the connecting pipe body (1) via a rotating groove (4); and the rotating groove (4) is provided in the wall of the connecting pipe body (1).

5. The smoke exhaust hood pipe for preventing wind backflow according to claim 3 is characterized by: The outer wall of the rotating rod (51) is rotatably connected to the inner wall of the positioning plate (21), and the inner wall of the pushing block (53) is threadedly connected to the outer wall of the thread groove (52).

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