CN2039388U - Reinforcement and seal device for boiler shutoff door - Google Patents

Abstract

The utility model relates to a reinforcement and seal device for boiler shutoff door, belonging to the class of machinery. The reinforcement and seal device for boiler shutoff door is suitable for the communication and disconnection between the hearth of a coal-fired boiler and a slag extractor which are in large and medium sized power plant. A set of reinforcement device which is composed of a rotating disk, a push rod and an inserting plate is arranged on the shutoff door every a shutoff door; the rotating disk is clockwise rotated, and the inserting plate can insert towards two adjacent shutoff doors; Thus, all the shutoff doors can be integral with one another to achieve the purpose of reinforcement. A plurality of steel sheets can be adopted to form the labyrinth type structure in order to seal the shutoff doors, and the steel sheets can be used in combination with asbestos cloth rolls, thus enhancing the sealing effect and the boiler thermal efficiency.

Description

Reinforcement and seal device for boiler shutoff door

The utility model relates to a kind of boiler firmization of shutoff door and sealing device, belongs to mechanical.Be applicable to that big-and-middle-sized power plant coal-burning boiler furnace bottom does being communicated with disconnecting between boiler and the slag extractor and use.

Shutoff door and on sealing device, be installed in around the coal-burning boiler furnace bottom, form by the multi-disc shutoff door, form a skirt-type structure around the furnace bottom.When shutoff door was closed, adjacent two were adopted overlap joint crack between a door and its frame pattern and closure, and each sheet can open and close separately, is promoted by electric pushrod.Figure 1 shows that wherein two external form of shutoff door, electric pushrod (1) is a global facility, and the overhanging or withdrawal of energising rear push-rod can be closed shutoff door or open.Fig. 2 is the A-A cut-away view of Fig. 1, the pattern that shows furnace bottom mouth both sides installation shutoff door, respectively there is shutoff door (3) (4) furnace bottom mouth (2) both sides, so multi-disc is around end mouth (2), and formation skirt-type structure, the effect of shutoff door is furnace bottom is reliably closed and sealed, boiler thermal output can be improved and can just slag extractor can be keeped in repair at the slag extractor below not releasing, otherwise because glitch must be released slag extractor and fix a breakdown, labour intensity is too big, and untimely, therefore, this is an important link.Shutoff door is independent switching at present, and C-C cuts open and show that the structure that shows is made inserts with asbestos yardage roll (10) on Fig. 4 among sealing employing Fig. 1, fills out to be placed in the sealing ring.

Currently used shutoff door and sealing device exist following defective:

1, the shutoff door position is in the high-temperature region, and long-time the use is because action of high temperature, each all can produce different distortion, therefore not tight when closing, by close locate hot with Louing, leak out, leak slag and influence boiler thermal output, do not release the purpose that slag extractor can overhaul and have.

2, the whip stitch structure is arranged between the shutoff door when closing, each sheet separates, and meets big slag and falls, and can break wherein a slice, or be stuck in the whip stitch.

3, adopt the seal form of asbestos yardage roll, unreliable, asbestos cloth twists under the high temperature long duration of action, very easily damages, and particularly after shutoff door deformed, the asbestos yardage roll can not have sealing function.

The purpose of this utility model is to avoid above-mentioned weak point of the prior art, and a kind of firmization shutoff and new-type sealing device are provided.

The purpose of this utility model can reach by following measure, on the structure of existing shutoff door, a kind of each sheet shutoff door is joined together has been installed and reached and made a device of firmization of integral body, one rotary rotating disk is installed on the interior plate washer of every interval a slice shutoff door, have on this dish and rotate flexibly and two anti-push rods of direction, when forwarding the position of " pass " at rotating disk, the right-hand left promotion plate of push rod, the outer baffle-plate plate is inserted on adjacent two shutoff doors, and make adjacent two with oneself being unified into an integral body, and reach firmization purpose.Rotating disk forwards the position of " opening " to, and then each sheet separately freely moves separately.Simultaneously in the sealing of interior outer baffle-plate, adopt chevron " labyrinth " formula structure, the flow conductance passage is sealed through several complications.

The drawing of accompanying drawing is described as follows:

Fig. 1 is existing adjacent two structural representation of shutoff door

Fig. 2 is the A-A cut-away view of Fig. 1

Fig. 3 is that the utility model boiler shutoff door has just been changed structural representation.

Fig. 4 is the C-C cut-away view of Fig. 1

Fig. 5 is the B-B cut-away view that the utility model has just been changed shutoff door structure chart 3

The utility model is described in further detail below in conjunction with accompanying drawing embodiment:

As Fig. 2, Fig. 3, shown in Figure 5: open the pass of shutoff door (3), (4) is to be realized by electric pushrod (1), energising turn push rod (1) is closed shutoff door (3), (4), shutoff door (3), (4) are opened in counter-rotating, rotating disk (11) is housed on the plate washer (12) in shutoff door (3), (4), two push rods (13) that the position is relative are arranged on it, push rod (13) connects with bearing pin (15) with rotating disk (11), connects with rotating shaft (17) with plate (16).When clockwise rotating rotating disk (11) (just rotating disk forwards the position of " pass " to), two push rods (13) promote plate (16) respectively and insert on adjacent two shutoff doors in (3) (4), the layout of rotating disk (11) is that a rotating disk (11) is housed on a slice shutoff door, so, each rotating disk (11) all sticks in adjacent two shutoff doors (3), (4), thereby constitute an integral body, and reach the purpose that just turns usefulness into, prevented the generation of thermal deformation.Counterclockwise rotation Moving plate (11) (just rotating disk forwards the position of " opening " to), plate (16) are by deviating from the adjacent two segment doors, and each sheet shutoff door can free folding.The rotation of rotating disk (11) is that manually hermetically-sealed construction can use separately as shown in Figure 5, also can be used in combination with asbestos yardage roll (10) shown in Figure 4.Position and quantity that multi-disc sheet steel (18) is welded on interior plate washer (12) and the outer baffle-plate (14) are interlaced and corresponding.Can on structure shown in Figure 5, add the asbestos yardage roll (10) of Fig. 4 when being used in combination.This intervening portion is formed " labyrinth " formula structure, and existing passage plays the effect that stops air-flow straight-through again, make airflow obstruction and reach sealing function through several complications, as being used in combination,, also can play sealing function even asbestos yardage roll (10) is damaged with asbestos yardage roll (10).

The new contrast of this practicality prior art has following advantage:

1, adopt rotating disk, push rod, board plug structure and reach firmization shutoff door purpose are simple, convenient.

2, be fixed into integral body between each sheet of shutoff door, but prevent the thermal deformation of each sheet, use reliable.

3, new type sealing device, simple, effective, easy to maintenance.

4, shutoff door has just been changed and reliable hermetically-sealed construction, has improved boiler thermal output, has economized coal.

Firmization of shutoff door and hermetically-sealed construction that the utility model adopts have solved long-standing problem, and hot benefit is increased, and have saved the energy, have promotional value.

Claims (5)

1, the makeup just of a kind of boiler shutoff door is put, and is made up of rotating disk, push rod, plate etc., it is characterized in that:

A, rotating disk (11) go up and are equipped with about push rod (13) one on the relative position;

B, push rod (13) are gone up at rotating disk (11) and are installed with bearing pin (15), connect with plate (16) with rotating shaft (17);

C, rotating disk (11) are contained on the interior plate washer (12);

2, boiler shutoff door according to claim 1 makeup is just put, and it is characterized in that: it is to install one every a film gate that rotating disk (11) is installed on the shutoff door (3) (4).

3, the disconnected makeup just of closing the door of boiler according to claim 1 is put, and it is characterized in that: the rotation of rotating disk (11) is manual.

4, a kind of boiler shutoff door sealing device is made up of the multi-disc sheet steel, is characterized in: staggering mutually in the position that is welded in the sheet steel (18) on interior plate washer (12) and the outer baffle-plate (14), and forms a kind of " labyrinth " formula passage.

5, boiler shutoff door sealing device according to claim 4 is characterized in that: " labyrinth " hermetically-sealed construction that multi-disc sheet steel (18) is formed, can install and use with the hermetically-sealed construction combination that asbestos yardage roll (10) is formed.

Images