CN110486738A - A kind of device of flue gas/air preheater soot blower - Google Patents

Abstract

A sootblower device for a flue gas/air preheater, comprising a front bracket on which a running head is installed, the front bracket is connected to a frame, a lever is installed on the upper end of the frame, and the lever is connected to a connecting rod and a crank arm Combined into a crank arm rocker mechanism, the left end of the crank arm is connected to the output shaft of the reducer through the set screw, and the right end is connected to the connecting rod through the set screw to form a crank arm linkage mechanism. The reducer is connected through the set screw and The key fits to connect one end of the crank arm, the output shaft is connected to the coupling, the second-stage worm reducer is installed between the motor, the reducer and the coupling, the output shaft is driven by the motor and controlled by the switch device, and the outside of the coupling is controlled by the support Supported by a frame, it has the characteristics of tight structure, not easy to block soot, wide and adjustable soot blowing angle, and uniform soot blowing.

Description

A device for flue gas/air preheater soot blower

technical field

The invention belongs to the field of heat exchange links of large boilers, and in particular relates to a soot blower device for a flue gas/air preheater.

Background technique

The preheater uses the heat dissipation plate in the flue gas channel at the boiler tail to preheat the air that is about to enter the boiler to a certain temperature, which is conducive to ignition and combustion, improves boiler efficiency and heat exchange performance, reduces exhaust gas temperature, and reduces energy consumption. The soot blower on the boiler uses the nozzle to form a high-speed jet to blow away the deposits on the flue gas side of the heating surface.

At present, air preheaters are divided into tubular air preheaters and rotary air preheaters. Rotary air preheaters are generally used in power station boilers, and steam soot blowing is generally used as the main method, supplemented by water flushing. Unfavorable conditions such as low-temperature corrosion and dust blocking cause economic losses.

Contents of the invention

In order to overcome the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a soot blower device for a flue gas/air preheater, which has a tight structure, is not easy to block the soot, has a wide and adjustable soot blowing angle, and has a uniform soot blowing specialty.

In order to overcome the above-mentioned deficiencies in the prior art, the technical scheme adopted in the present invention is:

A sootblower device for a flue gas/air preheater, including a front bracket on which a running head is installed, the front bracket is connected to a frame, a lever is installed on the upper end of the frame, and the lever is connected to a connecting rod and a crank arm Combined into a crank arm rocker mechanism, the left end of the crank arm is connected to the output shaft of the reducer through the set screw, and the right end is connected to the connecting rod through the set screw to form a crank arm linkage mechanism. The reducer is connected through the set screw and The key fits to connect one end of the crank arm, the output shaft is connected to the coupling, the secondary worm gear reducer is installed between the motor, the reducer and the coupling, the output shaft is driven by the motor and controlled by the switch device, and the outside of the coupling is controlled by the support frame support;

The front bracket is installed on the right end of the running head assembly, and the bracket is connected to the frame through flanges and bolts;

The frame is installed outside the running head in the running head, the machine cover is used to connect the front bracket, the running angle pointer plate indicates the working angle through the pointer, and the upper bearing and the lower bearing are installed at both ends of the running head;

The lever is installed on the uppermost end of the running head and connected with the connecting rod and the crank arm to form a crank arm rocker mechanism;

The connecting rod connects the lever and the crank arm;

The left end of the crank arm is connected to the output shaft of the reducer through the set screw, and the right end is connected to the connecting rod assembly through the set screw to form a crank arm linkage mechanism;

The coupling is a roller chain coupling, and the sprocket and the sprocket are connected by a chain;

The left end of the gear shaft in the motor and reducer is connected to the motor, and the right end is meshed with the gear. The rolling bearing and the rolling bearing are respectively installed at the left and right ends of the gear shaft. The screws are used for the housing of the motor and the reducer. On the gear shaft, the gear meshes with the gear for transmission. The rolling bearing is installed at the right end of the gear, the adjusting washer is installed between the shaft output end and the coupling, and the screw is installed at the lower end of the reducer box;

The switching device on the motor and reducer plays a role in controlling the operation of the equipment;

The nameplate in the bracket is fixed on the bracket by rivets, and the bracket is installed at the lower end of the reducer for fixing and supporting the machine body.

The beneficial effects of the present invention are:

1) Tight structure, not easy to block ash.

2) It is easy to operate and can be driven by the handle.

3) The soot blowing angle is wide and adjustable, and the soot blowing is uniform.

4) The welding quality is high, and the inside of the nozzle can withstand high temperature. , not easily damaged by heat blowing.

Description of drawings

Fig. 1 is the front view of the present invention;

Fig. 2 is the top view of the present invention

Fig. 3 is a side view of the present invention

Fig. 4 is front bracket of the present invention

Fig. 5 is a schematic diagram of the frame structure of the present invention.

Fig. 6 is a structural schematic diagram of the crank arm assembly of the present invention.

Fig. 7 is a structural schematic diagram of the coupling of the present invention.

Fig. 8 is a structural schematic diagram of the motor and reducer of the present invention.

Fig. 9 is a structural schematic diagram of the rotation mode diagram of the reducer of the present invention.

Fig. 10 is a schematic diagram of the bracket structure of the present invention.

Detailed ways

As shown in Figures 1 to 10, a device for a flue gas/air preheater soot blower includes a front bracket 2, which is characterized in that the front bracket 2 is equipped with a running head 1, and the front bracket 2 is connected to the machine Frame 3, lever 4 is installed on the upper end of frame 3, and lever 4 is connected with connecting rod 5 and crank arm 6 to form a crank arm rocker mechanism. The connecting rod 5 is connected by a set screw to form a crank arm linkage mechanism. The reducer 7 is connected to one end of the crank arm 6 through a set screw and a key, the output shaft is connected to the coupling 8, and the secondary worm reducer 9 Installed between the motor and reducer 10 and the coupling 8, the output shaft is driven by the motor and controlled by the switch device 11, and the coupling 12 is supported by the bracket 8 outside;

The front bracket 2 is installed on the right end of the running head assembly 1, and the bracket 2-1 is connected to the frame 3 through flanges and bolts 2-2;

The frame 3 is installed outside the operating head 1 in the operating head 1, the machine cover 3-1 is used to connect the front bracket 2, and the operating angle pointer plate 3-2 indicates the working angle through the pointer 3-3;

The lever 4 is installed on the uppermost end of the running head 1 and connected with the connecting rod 5 and the crank arm 6 to form a crank arm rocker mechanism;

The connecting rod 5 connects the lever 4 and the crank arm 6;

The left end of the crank arm 6 is connected to the output shaft of the speed reducer 7 through the set screw, and the right end is connected to the connecting rod assembly 5 through the set screw to form a crank arm linkage mechanism;

Described coupling 12 is a roller chain coupling, and sprocket 12-1 and sprocket 12-2 are connected by chain 12-3;

In the motor and reducer 10, the left end of the gear shaft 10-1 is connected to the motor, and the right end meshes with the gear 10-5. The rolling bearing 10-3 and the rolling bearing 10-4 are installed on the left and right ends of the gear shaft 10-1 respectively. 10-2 is used for the housing of the motor and the reducer, the gear 10-5 and the gear 10-6 are installed on the same gear shaft, the gear 10-6 is meshed with the gear 10-7 for transmission, and the rolling bearing 10-8 is installed on the gear 10 On the right end of -7, the adjusting washer 10-9 is installed between the shaft output end and the coupling, and the screw 10-10 is installed at the lower end of the reducer box;

The switching device 11 on the motor and reducer 10 plays a role in controlling the operation of the equipment;

The nameplate 8-1 in the bracket 8 is fixed on the bracket by rivets, and the bracket 8-2 is installed at the lower end of the reducer 9 for fixing and supporting the body.

As shown in Fig. 1, Fig. 2 and Fig. 3, Fig. 1 is a front view, and Fig. 2 and Fig. 3 are respectively a top view and a side view. Its specific structure is as follows:

Running head assembly 1 is installed in the innermost end of Fig. 1 front view, its knot. The gas flows in from the bottom end in Figure 3 and blows out from the leftmost nozzle nozzle. The working requirements of different situations can be achieved by changing the angle of the operating head assembly. The rest of the plate components play the role of connection and support through welding.

The front bracket 2 is installed on the right end of the running head assembly 1, and its structural diagram is shown in Figure 4. In Figure 4, the bracket 2-1 is connected to the frame assembly 3 through flanges and bolts, and its function is Support and fix the right end of the running head assembly 1.

The frame 3 is installed on the outside of the operating shaft 1-9 in the operating head assembly 1, and its structural diagram is shown in Figure 5. In Figure 5, the machine cover 3-1 is used to connect the front bracket assembly 2, and its function is Fix and support the operation of the running head assembly, and also play the role of connecting each component and supporting the machine parts. The operation angle pointer plate 3-2 indicates the working angle through the pointer 3-3;

Lever 4 is installed on the uppermost end of running shaft 1-9, and connecting rod assembly 5, crank arm assembly 6 is connected and combined into a crank arm rocker mechanism, is used for power transmission, drives running shaft assembly 1 conversion working angle.

The connecting rod 5 connects the lever assembly 4 and the crank arm assembly 6, and the reciprocating motion is used for transmission.

The crank arm assembly 6, as shown in Fig. 6, the left end is connected to the output shaft of the speed reducer 7 through the set screw, and the right end is connected to the connecting rod assembly 5 through the set screw to form the crank arm linkage mechanism.

Bracket assembly 8, its structural diagram as shown in Figure 10, nameplate 8-1 is fixed on the bracket by rivet, and bracket 8-2 is installed in the lower end of reducer 9, is used for fixing and supporting body.

The reducer 9 is a two-stage worm gear reducer, which is installed between the motor and the reducer 10 and the shaft coupling assembly 8 for deceleration.

The structure of the motor and reducer 10 is shown in Figure 8. The left end of the gear shaft 10-1 is connected to the motor, and the right end is meshed with the gear 10-5. The rolling bearing 10-3 and the rolling bearing 10-4 are installed on the gear shaft 10-1 respectively. The left and right ends play the role of support and transmission. The screw 10-2 is used for the housing of the motor and the reducer, which plays the role of fixing and linking. Gear 5 and gear 6 are installed on the same gear shaft, and gear 10-6 It is meshed with the gear 10-7 for transmission, and the rolling bearing 10-8 is installed on the right end of the gear 10-7 to support and transmit power. The adjusting washer 10-9 is installed between the shaft output end and the coupling to play a role The role of positioning and fixing parts. Screws 10-10 are installed at the lower end of the reducer casing, and are used to connect the end cover of the reducer body and the casing.

The switch device 11 plays a role in controlling the operation of the equipment.

The coupling assembly 12, its structural diagram is shown in Figure 7, the coupling is a roller chain coupling, in Figure 7, the sprocket 12-1 and the sprocket 12-2 are connected by a chain 12-3 , has a certain compensation ability.

The working principle of the present invention is:

The working principle of the air preheater soot blower is: the motor and the reducer 10 generate power and reduce it through the gear reducer. The transmission mode of the reducer 10 is shown in Figure 8, and the motor transmits the power to the gear shaft 10-1. The gear 10-1 on the gear shaft meshes with the gear 10-5 for transmission, the gear 10-5 and the gear 10-6 are located on the same gear shaft 10-11, and the power is then transmitted to the gear 10-6 through the gear shaft 10-11, and then It is transmitted to the gear 10-7 meshed with the gear 10-6, and the final power is transmitted to the speed reducer 9 by the output shaft. The reducer 9 is a two-stage worm gear reducer, the input and output shafts are parallel, the power is transmitted from the left side of Figure 1, and the right side is transmitted to the coupling assembly 12, and the coupling transmits the power to the reducer 7 (In the case of manual operation, the worm shaft in the reducer 7 can be driven by shaking the handle), and the output shaft of the reducer 7 worm gear rotates to drive the crank arm outside the box to rotate in a circle, and the connecting rod connected to the other end of the crank arm follows the reciprocating motion, thus pulling the lever. The 4 thin ends swing at a certain angle, and the 4 thick ends of the lever assembly rotate to drive the running head assembly at the lower end to swing left and right, so as to adjust the angle of the nozzle 1 to complete the work.

The blowing direction is that the gas enters from the lower port in Figure 3, first shrinks and then expands along the pipe diameter, and blows out from the nozzle 1 after accumulating and pressurizing.

Claims (1)

1. a kind of flue gas/air preheater soot blower device, including front rack (2), which is characterized in that front rack is pacified on (2) It ships rotary head (1), front rack (2) connects rack (3), and lever (4) is installed on rack (3) upper end, lever (4) and connecting rod (5), song Arm (6) connection is combined into a rocker device of cranking arm, output shaft of (6) one end by holding screw fixed retarder (7) of cranking arm, The other end connects connecting rod (5) by holding screw, constitutes curved arm rod mechanism, the retarder (7) by holding screw and Key mating connection is cranked arm (6) one end, is exported axis connection shaft coupling (12), and second-stage worm gear worm reducer (9) is mounted on motor And between retarder (10) and shaft coupling (12), output shaft is driven by motor, is controlled by switching device (11), shaft coupling (12) Outside is supported by bracket (8)；

The front rack (2) is mounted on the right end of operating head assembly (1), and bracket (2-1) is by flange and is bolted to machine On frame (3)；

The rack (3) is mounted on operating head (1) outside in operating head (1), and cover (3-1) is used to connect front rack (2), Operating angle pointer board (3-2) indicates operating angle by pointer (3-3)；

The lever (4) is installed on the top of operating head (1) and connecting rod (5), (6) connection of cranking arm are combined into one and crank arm and shake Linkage；

The connecting rod (5) connects lever (4) and cranks arm (6)；

Described (6) left end of cranking arm was connected to the output shaft of holding screw fixed retarder (7), and right end is connected by holding screw Connecting rod ASSY (5) constitutes curved arm rod mechanism；

Nameplate (8-1) is fixed on bracket by rivet in the bracket (8), and bracket (8-2) is mounted under retarder (9) End, for fixing and supporting body；

The motor and the left end retarder (10) middle gear axis (10-1) link this motor, and right end is nibbled with gear (10-5) Conjunction, rolling bearing (10-3) and rolling bearing (10-4) are separately mounted to the left and right ends of gear shaft (10-1), screw (10-2) For the shell of motor and retarder, gear (10-5) and gear (10-6) are mounted on same gear shaft, gear (10-6) Again and gear (10-7) engaged transmission, rolling bearing (10-8) are mounted on the right end of gear (10-7), adjusting washer (10-9) peace Between axis output end and shaft coupling, screw (10-10) is mounted on the lower end of reduction case；

The motor and retarder (10) upper switch device 11 play the role of controlling equipment operation；

The shaft coupling (12) is that a roller chain coupling, sprocket wheel (12-1) and sprocket wheel (12-2) are connected by chain (12-3) It connects.