Smoke leakage prevention check valve

Abstract

The utility model discloses a smoke leakage prevention check valve, which belongs to the technical field of check valves and comprises a smoke exhaust pipe, an air inlet pipe is arranged on one side of the smoke exhaust pipe, a casing is mounted on the outer side of the smoke exhaust pipe, and a driving component is mounted on the casing and positioned above the smoke exhaust pipe. A connecting assembly is installed on the smoke exhaust pipe and located on the side, away from the air inlet pipe, of the shell. A smoke exhaust cover is installed on the driving assembly and the connecting assembly and located on the side, away from the air inlet pipe, of the smoke exhaust pipe. By arranging the length adjusting purification device, a worker can adjust the overall length of the check valve to a certain degree through cooperation of a first lead screw, a movable plate and other structures when needed, and therefore work requirements under different conditions can be better met; and the check valve can purify the flue gas to a certain degree through cooperation of structures such as activated carbon and a connecting frame when needed, and then the working capacity of the check valve is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of check valves, and in particular relates to a smoke leakage-proof check valve. Background Art

[0002] Check valves are generally used in the exhaust duct of household range hoods, including range hood check valves, plastic telescopic smoke pipes and flue check valves. Check valves are mainly composed of valve body, rocker, valve cover, etc.

[0003] Chinese patent application No. 202021468594.6 discloses a flue check valve, including a shell, a smoke exhaust component, a smoke exhaust cover and a drive component. The shell is provided with a connecting hole and a sliding hole. The smoke exhaust component includes a smoke exhaust pipe and a connecting piece. The smoke exhaust pipe is inserted into the connecting hole. It is provided with a smoke inlet and a smoke outlet. The cross section of the smoke outlet is an inclined surface. The smoke exhaust cover is rotatably connected to the smoke exhaust pipe to close or open the smoke outlet. The drive component includes an electromagnet, a magnetic suction piece and a traction belt. The electromagnet is fixedly connected to the bottom of the sliding hole. The magnetic suction piece is located in the sliding hole. The traction belt is respectively connected to the magnetic suction piece and the smoke exhaust cover. The flue check valve provided by the utility model sets the end face of the smoke outlet as an inclined surface, and uses the electromagnet and the magnetic suction piece to drive the traction belt to pull the smoke exhaust cover so that it rotates relative to the smoke exhaust pipe, so that the flue check valve can still open or close the smoke outlet through the smoke exhaust cover even if it is contaminated with oil after long-term use.

[0004] 1. The above-mentioned disclosed patent has the problem that the overall length of the check valve cannot be adjusted when needed and the flue gas cannot be purified when needed, thereby reducing the working capacity of the check valve; 2. The above-mentioned disclosed patent has the problem that when the exhaust cover is exposed to the outside, it is difficult to open normally due to the impact of rainwater, etc., thereby reducing the practicality of the check valve. Utility Model Content

[0005] In order to solve the problems raised in the above background technology, the utility model provides a smoke leakage prevention check valve, which has the characteristics of high working capacity and strong practicality.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a smoke leakage prevention check valve, comprising a smoke exhaust pipe, an air intake pipe is arranged on one side of the smoke exhaust pipe, a shell is installed on the outer side of the smoke exhaust pipe, a driving assembly is installed on the shell and at a position above the smoke exhaust pipe, a connecting assembly is installed on the smoke exhaust pipe and at a position on the side of the shell away from the air intake pipe, a smoke exhaust cover is installed on the driving assembly and the connecting assembly and at a position on the side of the smoke exhaust pipe away from the air intake pipe, the smoke exhaust pipe and the air intake pipe are connected by a length-adjustable purification device, and a shielding and protection device is installed above the length-adjustable purification device.

[0007] Preferably, the length-adjustable purification device includes a connecting shell, a purification component, a partition, a knob, a first screw rod and a movable plate. The connecting shell is installed on the air inlet pipe and at a position located on the outside of the shell, and the movable plate is installed below the shell and at a position located on the inside of the connecting shell. The first screw rod is installed on the connecting shell and at a position located on the inside of the movable plate through a bearing, and a knob is installed on one side of the first screw rod. A partition is installed on the inner side of one end of the air inlet pipe close to the smoke exhaust pipe, and a purification component is installed on the connecting shell and at a position located on the outside of the air inlet pipe.

[0008] Preferably, the outer sides of the shell and the movable plate are in close contact with the inner side of the connecting shell.

[0009] Preferably, the purification component includes a connecting frame, a blocking block, activated carbon and a fixed net. The connecting frame is installed on the inner side of the connecting shell and between the smoke exhaust pipe and the air intake pipe. The fixed net is installed on the inner side of the connecting frame. The inner side of the connecting frame and between the fixed net and the partition net are filled with activated carbon. Blocking blocks are installed on the connecting shell through threads at positions on the upper and lower sides of the air intake pipe.

[0010] Preferably, the shielding protection device includes a fixed box, a rotating plate, a second screw rod and a shielding plate. The fixed box is installed above the connecting shell, the second screw rod is installed at the central position of the fixed box through a bearing, the rotating plate is installed on the second screw rod and at a position on one side of the fixed box, and the shielding plate is installed on the outside of the second screw rod and at a position on the inner side of the fixed box through a thread.

[0011] Preferably, the heights of the inner top surface and the inner bottom surface of the fixing box are equal to the heights of the outer top surface and the outer bottom surface of the shielding plate.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model provides a length adjustment purification device, so that the staff can adjust the overall length of the check valve to a certain extent through the cooperation of the first screw rod and the movable plate and other structures when needed, so as to better meet the working needs in different situations, and the check valve can purify the flue gas to a certain extent through the cooperation of the activated carbon and the connecting frame and other structures when needed, thereby improving the working capacity of the check valve.

[0014] 2. The utility model provides a shielding and protective device so that the staff can, when necessary, shield rainwater and other objects from the outside through the cooperation of the second screw rod and the shielding plate and other structures, thereby preventing the exhaust cover from being difficult to open normally due to the impact of rainwater and other objects when in the outside, thereby improving the practicality of the check valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the utility model;

[0016] Figure 2 It is a three-dimensional cutaway view of the utility model;

[0017] Figure 3 It is a three-dimensional cutaway view of the length-adjustable purification device of the utility model;

[0018] Figure 4 It is a three-dimensional cutaway view of the shielding and protection device of the utility model.

[0019] In the figure: 1. exhaust pipe; 2. drive assembly; 3. length-adjusting purification device; 31. connecting shell; 32. purification assembly; 321. connecting frame; 322. blocking block; 323. activated carbon; 324. fixed net; 33. partition net; 34. knob; 35. first screw rod; 36. movable plate; 4. air intake pipe; 5. shielding protection device; 51. fixed box; 52. rotating plate; 53. second screw rod; 54. shielding plate; 6. shell; 7. connecting assembly; 8. exhaust cover. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example 1

[0022] See also Figure 1-4 The utility model provides the following technical solutions: a smoke leakage prevention check valve, comprising a smoke exhaust pipe 1, an air intake pipe 4 is arranged on one side of the smoke exhaust pipe 1, a shell 6 is installed on the outer side of the smoke exhaust pipe 1, a driving component 2 is installed on the shell 6 and at a position above the smoke exhaust pipe 1, a connecting component 7 is installed on the smoke exhaust pipe 1 and at a position on the side of the shell 6 away from the air intake pipe 4, a smoke exhaust cover 8 is installed on the driving component 2 and the connecting component 7 and at a position on the side of the smoke exhaust pipe 1 away from the air intake pipe 4, the smoke exhaust pipe 1 and the air intake pipe 4 are connected by a length adjustment purification device 3, and a shielding and protection device 5 is installed above the length adjustment purification device 3.

[0023] Specifically, the length-adjustable purification device 3 includes a connecting shell 31, a purification component 32, a partition net 33, a knob 34, a first screw rod 35 and a movable plate 36. The connecting shell 31 is installed on the air intake pipe 4 and is located on the outside of the shell body 6. The movable plate 36 is installed below the shell body 6 and is located on the inside of the connecting shell 31. The first screw rod 35 is installed on the connecting shell 31 and is located on the inside of the movable plate 36 through a bearing. The knob 34 is installed on one side of the first screw rod 35. A partition net 33 is installed on the inner side of one end of the air intake pipe 4 close to the smoke exhaust pipe 1, and a purification component 32 is installed on the connecting shell 31 and is located on the outside of the air intake pipe 4.

[0024] By adopting the above technical solution, the staff can adjust the overall length of the check valve to a certain extent through the cooperation of the first screw rod 35 and the movable plate 36 and other structures when necessary, so as to better meet the working needs in different situations.

[0025] Specifically, the outer sides of the housing 6 and the movable plate 36 are in close contact with the inner side of the connecting shell 31 .

[0026] By adopting the above technical solution, a gap is prevented from existing between the outer sides of the shell 6 and the movable plate 36 and the inner side of the connecting shell 31, thereby preventing smoke leakage and preventing the movable plate 36 and other structures from rotating and deviating during movement.

[0027] Specifically, the purification component 32 includes a connecting frame 321, a blocking block 322, activated carbon 323 and a fixed net 324. The connecting frame 321 is installed on the inner side of the connecting shell 31 and is located between the smoke exhaust pipe 1 and the air intake pipe 4. The fixed net 324 is installed on the inner side of the connecting frame 321. The inner side of the connecting frame 321 and is located between the fixed net 324 and the partition net 33 is filled with activated carbon 323. The blocking blocks 322 are installed on the connecting shell 31 and on the upper and lower sides of the air intake pipe 4 through threads.

[0028] By adopting the above technical solution, the check valve can purify the flue gas to a certain extent through the cooperation of the activated carbon 323 and the connecting frame 321 when necessary, so as to better meet the working needs in different situations.

[0029] When the present embodiment is used, when the staff needs to use the check valve, the air intake pipe 4 is connected to the flue system, and then the knob 34 in the length adjustment purification device 3 is turned, thereby driving the first screw rod 35 to rotate. The first screw rod 35 is threadedly connected to the movable plate 36, and the outer sides of the movable plate 36 and the shell 6 are tightly attached to the inner side of the connecting shell 31, so the first screw rod 35 drives the movable plate 36 and the shell 6 and other structures to move, thereby adjusting the overall length of the check valve, and then the blocking block 322 in the purification component 32 can be unscrewed when necessary, and enough activated carbon 323 can be put into the connecting frame 321, and then the blocking block 322 can be installed back through the thread. During operation, the exhaust cover 8 is opened by cooperating with the connecting component 7 through the driving component 2, and the flue system The smoke sent out passes through the air intake pipe 4 and the partition net 33 and contacts with the activated carbon 323, and the activated carbon 323 purifies the smoke, and then the smoke passes through the fixed net 324 and the smoke exhaust pipe 1 and is discharged, so as to be used.

[0030] Example 2

[0031] The difference between this embodiment and embodiment 1 is that the shielding protection device 5 includes a fixed box 51, a rotating plate 52, a second screw rod 53 and a shielding plate 54, the fixed box 51 is installed above the connecting shell 31, the second screw rod 53 is installed at the center position of the fixed box 51 through a bearing, the rotating plate 52 is installed on the second screw rod 53 and at a position on one side of the fixed box 51, and the shielding plate 54 is installed on the outside of the second screw rod 53 and at a position on the inside of the fixed box 51 through a thread.

[0032] By adopting the above technical solution, the staff can shield the rain and other objects from the outside through the cooperation of the second screw rod 53 and the shielding plate 54 when necessary, thereby preventing the smoke exhaust cover 8 from being difficult to open normally due to the impact of rain and other objects in the outside.

[0033] Specifically, the heights of the inner top surface and the inner bottom surface of the fixing box 51 are equal to the heights of the outer top surface and the outer bottom surface of the shielding plate 54 .

[0034] By adopting the above technical solution, the check valve can ensure that the inner top and bottom surfaces of the fixing box 51 and the outer top and bottom surfaces of the shielding plate 54 are in close contact with each other, thereby preventing the shielding plate 54 from rotating and deviating during movement.

[0035] When this embodiment is in use, when the smoke exhaust cover 8 is outside, the staff can rotate the rotating plate 52 in the shielding protection device 5, thereby driving the second screw rod 53 to rotate. The second screw rod 53 is threadedly connected to the shielding plate 54, and the outer side of the shielding plate 54 is close to the inner side of the fixing box 51, so the second screw rod 53 drives the shielding plate 54 to move to the top of the smoke exhaust cover 8, thereby blocking rainwater and the like, preventing the smoke exhaust cover 8 from being difficult to open normally due to the impact of rainwater and the like when it is outside.

[0036] The structure and principle of the smoke exhaust pipe 1 and its upper structure, the drive assembly 2, the shell 6 and its upper structure, the connecting assembly 7 composed of a connecting piece and a boss, and the smoke exhaust cover 8 in the utility model have been disclosed in a flue check valve disclosed in Chinese patent application No. 202021468594.6. Its working principle is that in the initial state, the smoke exhaust cover closes the smoke outlet, and the smoke inlet of the smoke exhaust pipe is connected to the flue system, such as the outlet of the range hood in the kitchen, and the oil smoke exhausted in the flue system enters the smoke exhaust channel through the smoke inlet; at this time, the electromagnet is connected to the external power supply to generate magnetism, and the magnetic attraction part moves in the sliding hole toward the electromagnet under the action of the magnetic force, thereby driving the smoke exhaust cover relative to the smoke exhaust through the traction belt. The pipe rotates, that is, the exhaust cover is lifted by the traction belt to open the smoke outlet. After the smoke outlet is opened, the oil smoke in the smoke exhaust channel is discharged from the smoke outlet. When all the oil smoke is removed, the electrical connection of the electromagnet is cut off to make the magnetism of the electromagnet disappear, and the magnetic adsorption force between the magnetic suction part and the electromagnet also disappears, that is, the pulling force of the traction belt on the exhaust cover through the magnetic suction part disappears, and the exhaust cover rotates to the position before being lifted under the action of gravity to close the smoke outlet; by using the magnetic suction force and the traction belt to pull the exhaust cover relative to the exhaust pipe to open the smoke outlet, even if the flue check valve is stained with oil after long-term use, as long as the pulling force is sufficient, it can be ensured that the exhaust cover can be lifted to open the smoke outlet. At the same time, by setting the cross section of the smoke outlet to an inclined plane, the exhaust cover can close the smoke outlet under the action of gravity, even if the smoke outlet is stained with oil. The exhaust cover can still close the smoke outlet well.

[0037] The working principle and use process of the utility model are as follows: when the staff needs to use the check valve, the air intake pipe 4 is connected to the flue system, and then the knob 34 in the length adjustment purification device 3 is turned, thereby driving the first screw rod 35 to rotate, and the first screw rod 35 is threadedly connected to the movable plate 36, and the outer sides of the movable plate 36 and the shell 6 are tightly attached to the inner side of the connecting shell 31, so the first screw rod 35 drives the movable plate 36 and the shell 6 and other structures to move, thereby adjusting the overall length of the check valve, and then when necessary, the blocking block 322 in the purification component 32 can be unscrewed, and enough activated carbon 323 can be put into the connecting frame 321, and then the blocking block 322 can be installed back through the thread, and when working, the driving component 2 cooperates with the connecting frame 321 to The connecting component 7 opens the smoke exhaust cover 8, and the smoke sent out by the flue system passes through the air inlet pipe 4 and the partition net 33 to contact the activated carbon 323. The activated carbon 323 purifies the smoke, and then the smoke passes through the fixed net 324 and the smoke exhaust pipe 1 and is discharged for use; when the smoke exhaust cover 8 is outside, the staff can rotate the rotating plate 52 in the shielding protection device 5, thereby driving the second screw rod 53 to rotate. The second screw rod 53 is threadedly connected to the shielding plate 54, and the outer side of the shielding plate 54 is close to the inner side of the fixed box 51, so the second screw rod 53 drives the shielding plate 54 to move to the top of the smoke exhaust cover 8, thereby blocking rainwater, etc., preventing the smoke exhaust cover 8 from being difficult to open normally due to the impact of rainwater, etc. when it is outside.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A smoke leakage prevention check valve, comprising a smoke exhaust pipe, characterized in that: An air intake pipe is provided on one side of the smoke exhaust pipe, a shell is installed on the outside of the smoke exhaust pipe, a driving assembly is installed on the shell and at a position above the smoke exhaust pipe, a connecting assembly is installed on the smoke exhaust pipe and at a position on the side of the shell away from the air intake pipe, a smoke exhaust cover is installed on the driving assembly and the connecting assembly and at a position on the side of the smoke exhaust pipe away from the air intake pipe, the smoke exhaust pipe and the air intake pipe are connected by a length-adjustable purification device, and a shielding and protection device is installed above the length-adjustable purification device.

2. The smoke leakage prevention check valve according to claim 1, characterized in that: The length-adjustable purification device includes a connecting shell, a purification component, a partition, a knob, a first screw rod and a movable plate. The connecting shell is installed on the air intake pipe and at a position located outside the shell, and the movable plate is installed below the shell and at a position located inside the connecting shell. The first screw rod is installed on the connecting shell and at a position located inside the movable plate through a bearing, and a knob is installed on one side of the first screw rod. A partition is installed on the inner side of one end of the air intake pipe close to the smoke exhaust pipe, and the purification component is installed on the connecting shell and at a position located outside the air intake pipe.

3. The anti-leakage smoke check valve according to claim 2, characterized in that: The outer sides of the housing and the moving plate are in close contact with the inner side of the connecting shell.

4. The anti-leakage smoke check valve according to claim 2, characterized in that: The purification component includes a connecting frame, a blocking block, activated carbon and a fixed net. The connecting frame is installed on the inner side of the connecting shell and between the smoke exhaust pipe and the air intake pipe. The fixed net is installed on the inner side of the connecting frame. The inner side of the connecting frame and between the fixed net and the partition net are filled with activated carbon. Blocking blocks are installed on the connecting shell through threads at the upper and lower sides of the air intake pipe.

5. The anti-leakage smoke check valve according to claim 2, characterized in that: The shielding protection device includes a fixed box, a rotating plate, a second screw rod and a shielding plate. The fixed box is installed above the connecting shell, the second screw rod is installed at the central position of the fixed box through a bearing, the rotating plate is installed on the second screw rod and at a position on one side of the fixed box, and the shielding plate is installed on the outer side of the second screw rod and at a position on the inner side of the fixed box through a thread.

6. The smoke leakage prevention check valve according to claim 5, characterized in that: The heights of the inner top surface and the inner bottom surface of the fixing box are equal to the heights of the outer top surface and the outer bottom surface of the shielding plate.

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