Guide changing exhausting channel

[0032] Example 1

[0033] Variable conduction exhaust duct structure, such as figure 1 , 2 5, it includes an exhaust duct 1 and a fire check valve 2. The exhaust duct 1 is provided with a bottomless guide pipe 3, and the air outlet of the fire check valve 2 is arranged in the bottomless guide pipe 3.

[0034] The bottomless guide pipe 3 is fixedly connected with the fire check valve 2. The fire check valve 2 includes an air inlet 21, and a valve plate 22 is provided in the fire check valve 2. A valve disc 22 is provided in the fire check valve 2, and the valve disc 22 is connected to the valve body of the fire check valve 2 through a rebound device 4. The rebound device 4 is a tension spring 23. The bottom end of the valve plate 22 is hinged with the valve body of the fire check valve 2. The valve plate 22 is provided with a connecting buckle 24, and the connecting buckle 24 is connected to the valve body by a tension spring 23.

[0035] The bottom end of the valve plate 22 is hinged with the valve body of the fire check valve 2, a connecting buckle 24 is provided on the valve plate 22, and the connecting buckle 24 is connected to the valve body by a tension spring 23. The valve plate 22 is a flat plate. When the fire check valve 2 is not exhausted, due to the action of the tension spring 23, the valve plate 22 is in a vertical state, and the valve plate 22 blocks the air outlet of the fire check valve 2. When the fire check valve 2 is exhausted, the thrust of the air flow in the fire check valve 2 is greater than the pulling force of the tension spring 23, which pushes the valve plate 22 open, and makes the valve plate 22 fit the variable guide plate 32, so that the fire check valve The air outlet of 2 is in the maximum open state.

[0036] The bottomless guide tube 3 includes two symmetrically arranged side plates 31 and a variable guide plate 32 arranged between the two side plates 31. The two side plates 31, the variable guide plate 32 and the inner wall of the exhaust duct 1 enclose an upper and lower opening For a through catheter, the cross-sectional area of ​​the lower nozzle of the catheter is smaller than the cross-sectional area of ​​the upper nozzle of the catheter. The cross-sectional area of ​​the lower nozzle of the pipe is smaller than the cross-sectional area of ​​the upper nozzle of the pipe, so it can change the flow of the gas entering the pipe.

[0037] The lower end of the variable guide plate 32 is provided with a rotating shaft 33, which is hinged to the lower part of the two side plates 31; the upper part of the two side plates 31 is provided with more than one set of limit holes 34, and the upper part of the variable guide plate 32 is clamped with the limit holes 34 Pick up. The variable guide plate 32 is a flat plate. The connecting buckle 24 is arranged in the middle of the valve plate 22. The variable guide plate 32 is adjustable, and different angles between the variable guide plate 32 and the inner wall of the exhaust duct 1 can be set according to different floors, so as to achieve smoother exhaust of the entire exhaust duct 1 as a whole.

[0038] When the valve plate 22 is opened, it blocks the lower opening of the bottomless guide tube 3. When the fire check valve 2 is not exhausted, the valve plate 22 is in the retracted state under the action of the tension spring 23. At this time, the fire check valve 2 is in a closed state, and the bottomless guide pipe 3 is also in the up and down state. , Will not occupy the exhaust space in the exhaust duct 1, thereby ensuring the normal exhaust of the bottom users. At the same time, due to the upward jump of the bottom airflow, the air pressure of the bottomless guide tube 3 is greater than the internal air pressure of the fire check valve 2, so that the external air pressure will tightly press the valve plate 22 of the fire check valve 2 to prevent the fire from returning Valve 2 is in a closed state, and when a fire occurs in exhaust duct 1, this function becomes more important; when fire check valve 2 is exhausted, because the internal air pressure of fire check valve 2 is greater than exhaust duct 1, fire prevention The valve plate 22 of the check valve 2 is in an open state, the valve plate 22 is attached to the variable guide plate 32 of the bottomless guide tube 3, and the valve plate 22 blocks the bottom surface of the bottomless guide tube 3 to prevent the gas discharged from the bottom layer from passing through the bottomless guide tube 3. The bottom guide pipe 3 jumps up, occupying the exhaust space of the users on the floor; secondly, avoid the jump gas on the bottom floor from entering the bottomless guide pipe 3, mixing with the gas discharged from the floor, causing gas turbulence and affecting the entire exhaust duct 1. The overall exhaust effect.

[0039] Example 2

[0040] Variable conduction exhaust duct structure, such as figure 1 , 3 , 6, 8, 9, including an exhaust duct 1 and a fire check valve 2. The exhaust duct 1 is provided with a bottomless guide pipe 3, and the air outlet of the fire check valve 2 is set in the bottomless guide Inside the tube 3.

[0041] The bottomless guide pipe 3 is fixedly connected with the fire check valve 2. The fire check valve 2 includes an air inlet 21, and a valve plate 22 is provided in the fire check valve 2. When the valve plate 22 is opened, it blocks the lower opening of the bottomless guide tube 3. A valve disc 22 is provided in the fire check valve 2, and the valve disc 22 is connected to the valve body of the fire check valve 2 through a rebound device 4. The rebound device 4 includes a connecting rod 42 connected to the connecting buckle 24 provided on the valve plate 22, the connecting rod 42 is connected to the angular force spring 43 on the valve body of the fire check valve 2, and the middle of the connecting rod 42 is set on the rotating support. 41 on. Such as Figure 8 , 9 As shown, the lower end of the rotating support 41 is hinged with the valve body. When the fire check valve 2 is ventilated, the airflow pushes the valve plate 22 to the left to open the fire check valve 2; when the fire check valve 2 is not ventilated, the connecting rod 42 Retracted under the action of the angular force spring 43, the valve disc 22 is driven to be closed and connected with the air outlet of the fire check valve 2.

[0042] The valve plate 22 is an arc-shaped plate. By providing the arc-shaped valve plate 22, the resistance of the valve plate 22 to the air flow can be reduced, and the exhaust effect of the fire check valve 2 can be improved. When the fire check valve on the start floor is blown open and leaned against the bottomless inverted trapezoidal guide tube, the bottomless guide tube is turned into a bottomed guide tube, so that the flue gas flow section at this position is effectively reduced, then The flue gas from the lower floor can only rise along the periphery of the guide tube, producing a venturi effect, which is the same as a variable pressure plate, reducing the internal static pressure at the air inlet, which is beneficial to the flue gas emission of the starting floor.

[0043] The bottomless guide tube 3 includes two symmetrically arranged side plates 31 and a variable guide plate 32 arranged between the two side plates 31. The two side plates 31, the variable guide plate 32 and the inner wall of the exhaust duct 1 enclose an upper and lower opening For a through catheter, the cross-sectional area of ​​the lower nozzle of the catheter is smaller than the cross-sectional area of ​​the upper nozzle of the catheter. The connecting buckle 24 is arranged in the middle of the valve plate 22.

[0044] Example 3

[0045] Variable conduction exhaust duct structure, such as figure 1 , 4 7 shows an exhaust duct 1 and a fire check valve 2. The exhaust duct 1 is provided with a bottomless guide tube 3, and the air outlet of the fire check valve 2 is arranged in the bottomless guide tube 3.

[0046] The bottomless guide pipe 3 is fixedly connected with the fire check valve 2.

[0047] The fire check valve 2 includes an air inlet 21, and a valve plate 22 is provided in the fire check valve 2. When the valve plate 22 is opened, it blocks the lower opening of the bottomless guide tube 3.

[0048] The bottom end of the valve plate 22 is hinged with the valve body of the fire check valve 2, a connecting buckle 24 is provided on the valve plate 22, and the connecting buckle 24 is connected to the valve body by a tension spring 23. The valve plate 22 is an arc-shaped plate. The connecting buckle 24 is arranged in the middle of the valve plate 22.

[0049] The bottomless guide tube 3 includes two symmetrically arranged side plates 31 and a variable guide plate 32 arranged between the two side plates 31. The two side plates 31, the variable guide plate 32 and the inner wall of the exhaust duct 1 enclose an upper and lower opening For a through catheter, the cross-sectional area of ​​the lower nozzle of the catheter is smaller than the cross-sectional area of ​​the upper nozzle of the catheter.

[0050] The variable guide plate 32 is a folded plate, and a guide plate 35 is also provided between the two side plates 31, and the lower end of the guide plate 35 is connected with the upper end of the variable guide plate 32. The variable deflector 32 is a folded plate at the upper end, that is, the deflector 35, which can play the role of diversion and downstream flow, preventing the original airflow in the exhaust duct 1 and the airflow discharged by the fire check valve 2 from canceling each other, affecting the entire exhaust The exhaust effect of the airway.