CN106196122A - A flue baffle door with self-relieving function - Google Patents

Abstract

The invention discloses a flue damper door with a self-pressure-relief function, which belongs to the technical field of flue dampers and comprises a shell, wherein two groups of sealing baffle strips are arranged on opposite side walls of the shell, a damper is arranged between the opposite side walls of the two groups of sealing baffle strips, a driving shaft is inserted and connected to the left side of the bottom of the shell, the bottom of the driving shaft is connected with a right connecting rod mechanism through a pin shaft, the right end of the connecting rod mechanism is connected with a driven shaft through a pin shaft, when the damper door is opened, an electric actuating mechanism rotates with the shaft to enable a double-layer push plate to rotate anticlockwise, and the driven connecting rod plate is pushed by a lock shaft, so that the door is opened; when the double-layer push plate is closed, the electric actuating mechanism rotates with the shaft to enable the double-layer push plate to rotate clockwise, the door is closed by the force of the buffer device and the self weight of the baffle, when the baffle is closed and the flue has an overpressure trend, the left baffle and the right baffle can be automatically opened under the condition that the electric actuating mechanism does not operate, pressure is released, and the double-layer push plate is automatically closed after the pressure is reduced.

Description

A flue baffle door with self-relieving function

technical field

The invention relates to the technical field of flue damper doors, in particular to a flue damper door with a self-pressure relief function.

Background technique

The flue baffle door is used in various gas turbine waste heat boilers. The purpose is to significantly reduce the heat dissipation of the waste heat boiler during the shutdown of the waste heat boiler, which not only prolongs the life of the boiler, but also facilitates the restart time of the waste heat boiler. For medium and large The two-shift operation effect of the gas turbine waste heat boiler is obvious. The existing flue damper door generally adopts the shutter structure. When the shutter driving motor fails during use, the shutter itself does not have the function of automatic opening and closing. The air pressure in the air cannot be kept balanced, so we propose a flue damper door with self-relieving function.

Contents of the invention

The purpose of the present invention is to provide a flue baffle door with self-relieving pressure function to solve the problem that the shutter itself does not have the function of automatic opening and closing when the drive motor of the shutter proposed in the above background technology fails, which is harmful to the gas turbine boiler. The air pressure in the tank cannot maintain balance.

In order to achieve the above object, the present invention provides the following technical solutions: a flue damper door with self-relieving function, including a casing, two sets of sealing strips are arranged on the opposite side walls of the casing, the two sets of Baffles are arranged between the opposite side walls of the sealing bars, and a driving shaft is plugged into the left side of the bottom of the housing, and the bottom of the driving shaft is connected to the connecting rod mechanism on the right side through a pin shaft. The right end of the rod mechanism is connected with a driven shaft through a pin shaft, and the top of the driven shaft is plugged into the inner cavity of the housing, and the bottom of the driving shaft and the driven shaft are both sleeved with an external counterweight mechanism. The outer wall of the shaft is pin-connected with the electric actuator seat frame, the top of the electric actuator seat frame is screwed with the electric actuator, and the left side of the driving shaft and the right side of the driven shaft are both provided with a buffer device , two sets of rear axles are arranged on the left and right sides of the top of the housing, the positions of the two sets of rear axles correspond to the positions of the driving shaft and the driven axle respectively, and the outer wall of the rear axle is sleeved with a shaft limit ring , the top of the shaft limit ring is provided with a limit switch, and the center of the outer wall of the housing is screwed with a transport fixing device.

Preferably, the buffer device includes a fixing frame, a bottom plate is screwed to the left side of the fixing frame, and a reinforcing rib is welded to the left side wall of the bottom plate.

Preferably, a spring base is vertically provided on the top of the left end of the bottom plate, and a spring is sleeved on the outer wall of the spring base.

Preferably, a spring baffle is installed on the top of the spring, and a bolt is inserted into the top of the spring baffle.

Preferably, the bottom of the bolt penetrates the bottom plate, the bottom of the outer wall of the bolt is sleeved with a flat washer, and the bottom of the flat washer is provided with a lock nut.

Preferably, the top of the external counterweight mechanism is provided with a crank arm, and the bottom of the right end of the crank arm is inserted with a weight shaft.

Preferably, the outer wall of the weight shaft is sleeved with weights, the bottom of the weight is provided with a shaft sleeve, and the side wall of the shaft sleeve is connected to the weight shaft through screws.

Compared with the prior art, the beneficial effect of the present invention is: the flue baffle door with self-relieving function, the outer wall wraps the shell and the sealing bar to ensure the safety of the transportation process, and the electric actuator is used as the power source. The rod mechanism is used as the power transmission medium, and the electromechanical transmission makes it easier to open the door. The buffer device plays a certain role in protecting the parts of the baffle door. The external counterweight mechanism adopts a rotary balance method, which makes the balance of the baffle door better. .

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a top view of the present invention;

Fig. 3 is a structural schematic diagram of the buffer device of the present invention;

Fig. 4 is a schematic diagram of the structure of the external counterweight mechanism of the present invention.

In the figure: 1 housing, 2 sealing bar, 3 baffle plate, 4 driving shaft, 5 driven shaft, 6 rear axle, 7 connecting rod mechanism, 8 seat frame of electric actuator, 9 buffer device, 91 fixed frame, 92 Bottom plate, 93 reinforcement rib, 94 spring base, 95 spring, 96 spring baffle, 97 bolt, 98 flat washer, 99 lock nut, 10 electric actuator, 11 transport fixing device, 12 axis limit ring, 13 limit switch , 14 external counterweight mechanism, 141 crank arm, 142 weight shaft, 143 weight, 144 shaft sleeve.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Figures 1-4, the present invention provides a technical solution: a flue damper door with a self-relieving function, including a casing 1, and two sets of sealing strips are provided on the opposite side walls of the casing 1 2. A baffle 3 is arranged between the opposite side walls of the two groups of sealing bars 2, and a drive shaft 4 is plugged into the left side of the bottom of the housing 1, and the bottom of the drive shaft 4 is connected with the pin shaft The connecting rod mechanism 7 on the right is connected, and the right end of the connecting rod mechanism 7 is connected with the driven shaft 5 through a pin shaft, and the top of the driven shaft 5 is plugged into the inner cavity of the housing 1, and the driving shaft 4 and The bottom of the driven shaft 5 is sleeved with an external counterweight mechanism 14, and the outer wall of the driving shaft 4 is connected with an electric actuator mount 8 through a pole pin, and the top of the electric actuator mount 8 is screwed with an electric actuator. The actuator 10, the left side of the driving shaft 4 and the right side of the driven shaft 5 are provided with a buffer device 9, the left and right sides of the top of the housing 1 are provided with two groups of rear shafts 6, the two groups of rear shafts The positions of the shaft 6 correspond to the positions of the driving shaft 4 and the driven shaft 5 respectively, the outer wall of the rear shaft 6 is sleeved with a shaft limiting ring 12, and the top of the shaft limiting ring 12 is provided with a limit switch 13, so A transport fixing device 11 is screwed to the center of the outer wall of the casing 1 .

Wherein, the buffer device 9 includes a fixed frame 91, the left side of the fixed frame 91 is screwed with a bottom plate 92, the left side wall of the bottom plate 92 is welded with a reinforcing rib 93, and the top of the left end of the bottom plate 92 is vertically provided with Spring base 94, the outer wall of described spring base 94 is sleeved with spring 95, and the top of described spring 95 is equipped with spring baffle 96, and the top of described spring baffle 96 is plugged with bolt 97, and the bottom of described bolt 97 Through the bottom plate 92, the bottom of the outer wall of the bolt 97 is sleeved with a flat washer 98, the bottom of the flat washer 98 is provided with a locking nut 99, and the top of the external counterweight mechanism 14 is provided with a curved arm 141, and the curved arm 141 is provided on the top of the curved washer 98. The bottom of the right end of the arm 141 is plugged with a weight shaft 142, the outer wall of the weight shaft 142 is sleeved with a weight 143, the bottom of the weight 143 is provided with a shaft sleeve 144, and the side wall of the shaft sleeve 144 is screwed It is connected with the weight shaft 142 .

Working principle: the baffle door adopts the electric actuator 10 to complete the opening and closing of the baffle door. When opening, the electric actuator 10 rotates with a shaft to make the double-layer push plate rotate counterclockwise, and the passive coupling plate is pushed by the lock shaft, so that the door It is opened, and the buffer device 9 is compressed at the same time; when closed, the electric actuator 10 rotates with a shaft to make the double-layer push plate rotate clockwise, and the door is closed by the force of the buffer device 9 and the self-weight of the baffle 3. When the baffle 3 is closed Finally, when there is a trend of overpressure in the flue, when the electric actuator 10 is not operating, the left and right baffles 3 will automatically open to release the pressure, and they will automatically close after the pressure drops.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (7)

1. A flue damper door with a self-relieving function, comprising a housing (1), characterized in that two sets of sealing bars (2) are arranged on the opposite side walls of the housing (1), two Baffles (3) are arranged between the opposite side walls of the sealing bars (2), and a drive shaft (4) is plugged into the left side of the bottom of the housing (1), and the drive shaft (4) ) is connected with the linkage mechanism (7) on the right side through the pin shaft, the right end of the linkage mechanism (7) is connected with the driven shaft (5) through the pin shaft, and the top of the driven shaft (5) is inserted into Connected to the inner cavity of the housing (1), the bottom of the driving shaft (4) and the driven shaft (5) are both sleeved with an external counterweight mechanism (14), and the outer wall of the driving shaft (4) is passed through the support The rod pin is connected with an electric actuator mount (8), and the top of the electric actuator mount (8) is screwed with an electric actuator (10), and the left side of the driving shaft (4) is connected with the driven shaft ( 5) is provided with a buffer device (9) on the right side, two sets of rear axles (6) are arranged on the left and right sides of the top of the housing (1), and the positions of the two sets of rear axles (6) are respectively in line with the active The positions of the shaft (4) and the driven shaft (5) correspond, the outer wall of the rear shaft (6) is sleeved with a shaft limit ring (12), and the top of the shaft limit ring (12) is provided with a limit switch (13), the center position of the outer wall of the housing (1) is screwed with a transport fixing device (11). 2. A flue baffle door with self-relieving function according to claim 1, characterized in that: the buffer device (9) includes a fixing frame (91), and the left side of the fixing frame (91) The side is screwed with a bottom plate (92), and the left side wall of the bottom plate (92) is welded with reinforcing ribs (93). 3. A self-relieving flue damper door according to claim 1 or 2, characterized in that: a spring base (94) is vertically arranged on the top of the left end of the bottom plate (92), and the spring A spring (95) is sleeved on the outer wall of the base (94). 4. A flue baffle door with self-relieving pressure function according to claim 1 or 3, characterized in that: a spring baffle (96) is installed on the top of the spring (95), and the spring baffle Bolts (97) are plugged into the top of the plate (96). 5. A self-relieving flue damper door according to claim 1 or 4, characterized in that: the bottom of the bolt (97) penetrates the bottom plate (92), and the outer wall of the bolt (97) A flat washer (98) is sleeved at the bottom of the flat washer (98), and a lock nut (99) is provided at the bottom of the flat washer (98). 6. The flue baffle door with self-relieving function according to claim 1, characterized in that: the top of the external counterweight mechanism (14) is provided with a curved arm (141), and the curved arm The bottom of the right end of (141) is plugged with a weight shaft (142). 7. The flue baffle door with self-pressure relief function according to claim 1 or 6, characterized in that: the outer wall of the weight shaft (142) is sleeved with a weight (143), the The bottom of the weight (143) is provided with a shaft sleeve (144), and the side wall of the shaft sleeve (144) is connected with the weight shaft (142) by screws.