Flue gas backflow blocking device for flue of electrolytic aluminum smoke exhaust purification system

Abstract

The utility model discloses a flue gas backflow blocking device for an electrolytic aluminum smoke exhaust purification system flue, which comprises an upper half pipe, a lower half pipe and a plurality of valve plates, the upper half pipe is detachably connected with the lower half pipe, the upper half pipe and the lower half pipe are combined to form a complete pipeline, valve plates are arranged in the upper half pipe and the lower half pipe, rotating shafts are arranged on two sides of the valve plates, and the valve plates are arranged on the rotating shafts. The rotating shaft is fixed in the sealing bearing which is arranged at the joint of the upper half pipe and the lower half pipe, the rotating shaft on one side of the valve plate penetrates through the sealing bearing to be connected with the movable arm, the end of the movable arm is movably connected to the connecting rod, and the end of the connecting rod is connected with the telescopic rod. The sealing device is simple in structure, can be directly and additionally arranged at the required position of the whole flow channel of the electrolytic aluminum smoke exhaust purification fan according to requirements, can adjust the flow speed of smoke when being opened, can prevent smoke from flowing back when being closed, and can further improve the sealing effect and prevent smoke from flowing back compared with an adjusting valve while being adjusted, so that the service life of the whole flow channel is prolonged. Therefore, extra power consumption of the fan due to the fact that the standby machine pipeline is not sealed is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas reflux blocking, in particular to a flue gas reflux blocking device for a flue of an electrolytic aluminum fume exhaust purification system. Background Art

[0002] In the process of electrolytic aluminum production, a large amount of flue gas is emitted from the electrolytic cell. The flue gas is composed of gaseous and solid substances. The flue gas enters the main pipe network from the electrolytic cell gas collecting hood, enters the fume exhaust purification fan after passing through the dust collector, and finally is discharged into the atmosphere through the chimney. The flue gas flow rate, system resistance, and fan efficiency are the main factors affecting the energy consumption of the fume exhaust system. To ensure the normal operation of the electrolytic aluminum fume exhaust purification system, at least one standby machine needs to be set up. The standby machine relies on the inlet and outlet regulating valves to play a sealing role. However, the sealing effect of the regulating valve is generally not good. Under the action of the pressure difference between the inlet and outlet of the system, reflux often occurs in the standby machine, that is, part of the flue gas reciprocates in the fan system, increasing the additional power consumption of the fan. Summary of the Utility Model

[0003] The purpose of the utility model is to solve the technical problems existing in the above-mentioned prior art, and to propose a flue gas reflux blocking device for a flue of an electrolytic aluminum fume exhaust purification system.

[0004] To achieve the above purpose, the utility model adopts the following technical scheme:

[0005] A flue gas reflux blocking device for a flue of an electrolytic aluminum fume exhaust purification system, including an upper half pipe, a lower half pipe, and a plurality of valve plates. The upper half pipe and the lower half pipe are detachably connected. The upper half pipe and the lower half pipe are combined into a complete pipeline. A valve plate is arranged inside the upper half pipe and the lower half pipe. Rotating shafts are arranged on both sides of the valve plate. The rotating shafts are fixed in the sealing bearings. The sealing bearings are arranged at the connection of the upper half pipe and the lower half pipe. The rotating shaft on one side of the valve plate passes through the sealing bearing and is connected to a movable arm. The end of the movable arm is movably connected to a connecting rod. The end of the connecting rod is connected to a telescopic rod.

[0006] Blocking strips are respectively arranged on the upper and lower diagonal sides of the valve plate. The blocking strips are arranged at the edge of the valve plate and extend out of the valve plate. The blocking strips are soft rubber strips, which can bend and fit on the inner walls of the upper half pipe and the lower half pipe along with the rotation of the valve plate. The blocking strips play a sealing role for the valve plate.

[0007] Sealing strips are respectively arranged inside the upper half pipe and the lower half pipe on the upper and lower diagonal sides on both sides of the valve plate. The sealing strips are arranged corresponding to the blocking strips. The sealing strips play a role in sealing and blocking the valve plate.

[0008] The telescopic rod is an electric telescopic rod. The telescopic rod is fixed on the outer wall of the upper half pipe or the lower half pipe through a fixing block.

[0009] There are more than 2 valve plates, which can adjust the flow rate when opened and seal to prevent the backflow of flue gas when closed.

[0010] Sealing rubber strips are provided at the joints of the upper half pipe and the lower half pipe, which play a role of buffering and sealing. The upper half pipe and the lower half pipe are provided to facilitate installation and maintenance. Opposite connecting ears are provided on the outer pipe wall at the joint of the upper half pipe and the lower half pipe, and the connecting ears are connected by bolts.

[0011] The movable arm is an L-shaped movable arm. One end of the movable arm is fixed on the rotating shaft, and the other end of the movable arm is provided with a movable connecting chuck. A movable connecting joint is provided on the corresponding connecting rod of the movable connecting chuck. The movable connecting joint is hinged to the movable connecting chuck. The telescopic rod drives the connecting rod to move back and forth, the connecting rod drives the movable arm, and the movable arm rotates around the rotating shaft to drive the valve plate to rotate, so that the valve plate opens and closes.

[0012] The beneficial effects of the present utility model are as follows: the structure is simple, it can be directly installed at the required position of the whole flow channel of the electrolytic aluminum fume exhaust and purification fan according to requirements. When opened, it can adjust the fume flow rate, and when closed, it can prevent the backflow of flue gas. Compared with the regulating valve, while being adjustable, it can further improve the sealing effect and prevent the backflow of flue gas, thereby reducing the additional power consumption of the fan caused by the unsealed standby pipeline. Description of the Drawings

[0013] Figure 1 is the structural diagram of the present utility model;

[0014] Figure 2 is the internal valve structural diagram of the present utility model;

[0015] Figure 3 is the sectional view of the present utility model;

[0016] In the figure: 1, lower half pipe; 2, upper half pipe; 3, valve plate; 4, rotating shaft; 5, movable arm; 6, movable connecting chuck; 7, connecting rod; 8, movable connecting joint; 9, telescopic rod; 10, fixed block; 11, sealing bearing; 12, lower blocking strip; 13, connecting ear; 14, bolt; 21, upper blocking strip; 31, upper sealing strip; 32, lower sealing strip. Detailed Embodiments

[0017] Embodiment 1

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model;

[0019] Please refer to Figures 1 - 3 , the utility model provides a flue gas reflux blocking device for the flue of an electrolytic aluminum fume purification system, and its structure is as follows: it includes an upper half pipe 2, a lower half pipe 1 and a plurality of valve plates. The upper half pipe 2 and the lower half pipe 1 are detachably connected. The upper half pipe 2 and the lower half pipe 1 are combined into a complete pipeline, and a valve plate 3 is arranged inside the upper half pipe 2 and the lower half pipe 1; semi-circular upper blocking strips 21 and lower blocking strips 12 are respectively arranged on the upper and lower diagonal sides of the valve plate 3. The blocking strips are arranged at the edge of the valve plate 3 and extend out of the valve plate 3. The blocking strips are soft rubber strips; a semi-circular upper sealing strip 31 is arranged in the upper half pipe 2 on the other side of the valve plate 3 corresponding to the upper blocking strip 21, and a semi-circular lower sealing strip 32 is arranged in the lower half pipe 1 on the other side of the valve plate 3 corresponding to the lower blocking strip 12. The upper blocking strip 21 and the lower blocking strip 12 are diagonally arranged, and the upper sealing strip 31 and the lower sealing strip 32 are diagonally arranged; rotating shafts 4 are arranged on both sides of the valve plate 3, and the rotating shafts 4 are fixed in the sealing bearings 11. The sealing bearings 11 are arranged at the connection of the upper half pipe 2 and the lower half pipe 1. One end of the rotating shaft 4 on one side of the valve plate 3 passes through the sealing bearing 11 and is connected to the movable arm 5. The end of the movable arm 5 is movably connected to the connecting rod 7. The movable arm 5 is an L-shaped movable arm 5. One end of the movable arm 5 is fixed on the rotating shaft 4, and a movable connection chuck 6 is arranged at the other end of the movable arm 5. A movable connection joint 8 is arranged on the connecting rod 7 corresponding to the movable connection chuck 6. The movable connection joint 8 is hingedly connected to the movable connection chuck 6; the end of the connecting rod 7 is connected to the telescopic rod 9; the telescopic rod 9 is an electric telescopic rod 9, and the telescopic rod 9 is fixed on the outer wall of the lower half pipe 1 through the fixing block 10; sealing rubber strips are arranged at the connections of the upper half pipe 2 and the lower half pipe 1; opposite connecting ears 13 are arranged on the outer pipe wall at the connection of the upper half pipe 2 and the lower half pipe 1, and the connecting ears 13 are connected by bolts 14;

[0020] There are 3 valve plates, which are respectively movably connected to the connecting rod 7 through the rotating shaft 4 and the movable arm 5;

[0021] Specifically, the sealing strip and the blocking strip are correspondingly arranged, and the sealing strip plays a role in sealing and blocking the valve plate 3; the blocking strip can be bent and attached to the inner walls of the upper half pipe 2 and the lower half pipe 1 along with the rotation of the valve plate 3, and the blocking strip plays a sealing role for the valve plate 3; the telescopic movement of the telescopic rod 9 drives the forward and backward movement of the connecting rod 7. The connecting rod 7 drives the movable arm 5, and the movable arm 5 rotates around the rotating shaft 4 to drive the valve plate 3 to rotate, so that the valve plate 3 is opened and closed; the flow rate can be adjusted when the valve plate 3 is opened, and the flue gas reflux can be sealed and blocked when it is closed; the upper half pipe 2 and the lower half pipe 1 are arranged to facilitate installation and maintenance.

Claims

1. A flue gas reflux blocking device for the flue of an electrolytic aluminum fume exhaust purification system, comprising an upper half pipe, a lower half pipe and a plurality of valve plates, characterized in that: The upper half pipe and the lower half pipe are detachably connected. The upper half pipe and the lower half pipe are combined into a complete pipeline. A valve plate is arranged inside the upper half pipe and the lower half pipe. Rotating shafts are arranged on both sides of the valve plate. The rotating shafts are fixed in the sealed bearings. The sealed bearings are arranged at the connection of the upper half pipe and the lower half pipe. The rotating shaft on one side of the valve plate passes through the sealed bearing and is connected to the movable arm. The end of the movable arm is movably connected to the connecting rod. The end of the connecting rod is connected to the telescopic rod.

2. The flue gas reflux blocking device for the flue of the electrolytic aluminum fume exhaust purification system according to claim 1, characterized in that: Blocking strips are respectively arranged on the upper and lower diagonal sides of the valve plate. The blocking strips are arranged at the edge of the valve plate and extend out of the valve plate. The blocking strips are soft rubber strips.

3. The flue gas reflux blocking device for the flue of the electrolytic aluminum fume exhaust purification system according to claim 2, characterized in that: Sealing strips are respectively arranged in the upper half pipe and the lower half pipe on the upper and lower diagonal sides on both sides of the valve plate. The sealing strips are arranged corresponding to the blocking strips.

4. A flue gas reflux blocking device for a flue of an electrolytic aluminum fume purification system according to claim 3, characterized in that: The telescopic rod is an electric telescopic rod. The telescopic rod is fixed on the outer wall of the upper half pipe or the lower half pipe through a fixing block.

5. A flue gas reflux blocking device for a flue of an electrolytic aluminum fume exhaust purification system according to claim 4, characterized in that: There are more than 2 valve pieces.

6. The flue gas reflux blocking device for the flue of the electrolytic aluminum fume exhaust purification system according to claim 5, wherein: Sealing rubber strips are arranged at the connections of the upper half pipe and the lower half pipe.

7. A flue gas reflux blocking device for a flue of an electrolytic aluminum fume exhaust purification system according to claim 6, characterized in that: The movable arm is an L-shaped movable arm. One end of the movable arm is fixed on the rotating shaft. A movable connection chuck is arranged at the other end of the movable arm. A movable connection joint is arranged on the corresponding connecting rod of the movable connection chuck. The movable connection joint is hingedly connected to the movable connection chuck.

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