CN212536703U

CN212536703U - Flow limiting valve for bellows

Info

Publication number: CN212536703U
Application number: CN202021265668.6U
Authority: CN
Inventors: 王为
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-02
Filing date: 2020-07-02
Publication date: 2021-02-12
Anticipated expiration: 2030-07-02

Abstract

The utility model belongs to the technical field of the metallurgy, especially, relate to an air box current-limiting valve, which comprises a valve body, the valve plate, its characterized in that is equipped with confined valve body arc board in the box inside of valve body, be equipped with two bearing frames in the outside both sides of box of valve body, with this two bearing frames be connected with pivot device, the valve plate is connected with this pivot device, the valve plate includes the pipe, two half boards that turn over of setting in this pipe both sides, the board arc board is turned over to the setting at half board end, this turns over board arc board and valve body arc board butt joint, pivot device is including passing the pipe and setting up the axle in two bearing frames, two axle sleeves, the blind lid, sealed lid, the setting is at the tip of axle and with axle fixed. The utility model discloses the end of the board one end that turns over of valve has the circular arc shaped plate, cooperates the effect that plays the current-limiting with the convex board on the valve body, has satisfied the demand of sintering production, has overcome the shortcoming and the not enough of current flap valve technique again.

Description

Flow limiting valve for bellows

Technical Field

The utility model belongs to the technical field of the metallurgy, especially, relate to a bellows restriction valve.

Background

The sintering production process is that the sintering material is laid on a sintering machine trolley, the sintering is ignited from top to bottom under the action of air draft negative pressure of an air bellow at the lower part of the trolley, and the sintering is finished when the sintering material runs to the tail part. A large amount of hot waste gas containing dust is generated from the head to the tail of the sintering machine in the sintering process, the airflow temperature of an air box at the tail part is about 300-450 ℃, and bulk materials and dust are pumped away by the air box, the flap valve and the air box branch pipe through the main exhaust fan. The opening of the flap valve on each bellows is required to be adjusted to meet the production requirement of sintering of each section in order to control the air draft negative pressure of each bellows.

When the sintering is carried out to the tail part, because a sintering ore bed is formed, the air permeability of the ore bed is good, the air consumption is less, and a large amount of air is not effectively utilized. The air suction quantity of the tail air box is required to be controlled, meanwhile, the air leakage of a tail sealing cover plate is reduced, the valves of three air boxes which are arranged at the tail end in a reciprocal mode are required to be reduced, the opening degrees of 3 air box valves are respectively in the range of 50-60%, 35-45% and 20-25% according to the process requirements, the purpose of controlling can be achieved only when the turning plate is closed to be more than 75-80%, the distance between the valve plate and the valve body is small under the opening degree, a grate bar falling off from a trolley cannot pass through the grate bar, the grate bar is piled and blocked in the valves, and bulk material air boxes falling from gaps of the grate bar block the bulk material to affect production. The middle-out shaft type flap valve is one of the main devices on an exhaust pipeline of a sintering machine at present, and the structural defects of the flap valve cause that the flap valve cannot meet the production control requirements of head and tail air boxes. The air draft of the head and tail bellows in production can not be controlled, which is the biggest problem in use.

Disclosure of Invention

The utility model aims at providing a new-type bellows restriction valve to solve the difficult problem that head, afterbody bellows convulsions that exist in the sintering production can't be controlled.

The purpose of the utility model is realized by the following technical scheme:

the utility model relates to an air box flow-limiting valve, which comprises a valve body consisting of a box body and flanges at two ends of the box body, and a valve plate arranged in the box body, and is characterized in that a closed valve body arc plate is arranged inside the box body of the valve body, two bearing seats are arranged at two sides outside the box body of the valve body, a rotating shaft device is connected with the two bearing seats, the valve plate is connected with the rotating shaft device,

the valve plate comprises a circular tube, two half turning plates arranged at two sides of the circular tube, and a turning plate arc plate arranged at the tail end of one half turning plate, the turning plate arc plate is connected with the valve body arc plate in an abutting mode,

the rotating shaft device comprises a shaft which penetrates through the round pipe and is arranged in the two bearing seats, two shaft sleeves which are arranged at the two ends of the shaft, a blind cover which is arranged at the end part of one bearing seat, a sealing cover which is arranged at the end part of the other bearing seat, and a lever which is arranged at the end part of the shaft and is fixedly connected with the shaft, wherein the shaft is connected with the round pipe through a bolt,

the valve body circular arc plate is connected with the upper box plate and the side box plate of the box body and the incident flow plate in the valve body.

The arc plate of the turning plate has the same radian as the arc plate of the valve body.

The sealing cover comprises a packing gland and a through hole gland which are connected on the bearing seat through a stud bolt, and sealing packing arranged in the packing gland.

The axial center of the shaft is any position which takes the center of the valve body as the center of a circle and has a radius less than or equal to 150 mm.

The utility model has the advantages that:

the utility model relates to an air box flow limiting valve which is suitable for the technological characteristics of high air flow temperature, large dust, grate bar falling and the like of an air box at the tail part of a sintering furnace; the tail end of one end of the flap valve is provided with the circular arc-shaped plate which is matched with the circular arc-shaped plate on the valve body to play a role in limiting the flow, thereby meeting the requirements of sintering production and overcoming the defects of the prior flap valve; the utility model discloses simple and practical, operate steadily, not stifled valve, high temperature resistant, non-maintaining are applicable to the sintering machine bellows and use.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a view a-a of fig. 1 according to the present invention.

Fig. 3 is a view B-B of fig. 2 according to the present invention.

Detailed Description

The following further describes the embodiments of the present invention with reference to the drawings.

As shown in figures 1, 2 and 3, the air box flow-limiting valve of the utility model comprises a valve body 1 composed of a box body and flanges at two ends of the box body, and a valve plate 3 arranged in the box body, and is characterized in that a closed valve body arc plate 1-1 is arranged inside the box body of the valve body 1, two bearing seats 4 are arranged at two sides outside the box body of the valve body 1, a rotating shaft device is connected with the two bearing seats 4, the valve plate 3 is connected with the rotating shaft device,

the valve plate 3 comprises a round pipe 3-3, two half turning plates 3-2 arranged at two sides of the round pipe 3-3, a turning plate arc plate 3-1 arranged at the tail end of one half turning plate 3-2, the turning plate arc plate 3-1 is connected with the valve body arc plate 1-1,

the rotating shaft device comprises a shaft 7 which penetrates through the circular pipes 3-3 and is arranged in the two bearing blocks 4, two shaft sleeves 6 which are arranged at the two ends of the shaft 7, a blind cover 5 which is arranged at the end part of one bearing block 4, a sealing cover which is arranged at the end part of the other bearing block 4, a lever 2 which is arranged at the end part of the shaft 7 and is fixedly connected with the shaft 7, the shaft 7 is connected with the circular pipes 3-3 through bolts 12,

the valve body circular arc plate 1-1 is connected with an upper box plate and a side box plate of the box body and a flow-meeting plate 1-2 in the valve body.

The arc degree of the turnover plate arc plate 3-1 is equal to that of the valve body arc plate 1-1.

The sealing cover comprises a packing gland 11 and a through hole gland 9 which are connected on the bearing seat 4 through a stud bolt 8, and sealing packing 10 arranged in the packing gland 11.

The axis position of the shaft 7 is any position within the radius of less than or equal to 150mm by taking the center of the valve body 1 as the center of a circle.

The utility model relates to a high temperature resistant, prevent stifled novel flap valve, characteristics are that the rotation angle that the board was turned over in the change can change the ventilation volume of valve and play the effect of current-limiting.

The valve body 1 is composed of a box body and flanges at two ends of the box body, bearing seats 4 are arranged at two sides of the box body, and the valve body is characterized in that a closed valve body arc plate 1-1 is arranged inside the valve body, and the valve body arc plate 1-1 is connected with an upper box plate and a side box plate of the valve body 1 and a flow-meeting plate 1-2 arranged in the valve body 1 to form a single air flow channel.

The valve plate 3 is a special-shaped turnover plate and consists of two half turnover plates 3-2, a circular pipe 3-3 and a turnover plate circular arc plate 3-1. It is characterized in that a round pipe 3-3 is arranged on the turning plate, one end part of the half turning plate 3-2 is provided with a turning plate arc plate 3-1 with the same radian as the valve body arc plate 1-1 in the valve body 1, one end of the turning plate arc plate 3-1 is fixedly connected with the tail end of the half turning plate 3-2,

the shaft 7 passes through the round pipes 3-3 in the middle of the turning plate and the bearing seats 4 on two sides of the valve body 1. It is characterized in that a shaft 7 is connected with the turnover plate round pipe 3-3 by a bolt 12, and the shaft 7 is connected with a shaft sleeve 6 arranged in a bearing seat 4 in a sliding way.

The lever 2 is vertically connected with one end of the shaft 7, and is characterized in that the lever 2 is tightly fixed at one end of the shaft 7, when the lever 2 is swung left and right, the shaft 7 rotates along with the lever, and the turnover plate rotates around the shaft 7. The distance between one end of the turning plate and the lower box plate of the valve body 1 is changed, the ventilation area of the valve is changed, and the purpose of flow limitation is achieved.

As shown in figure 1, figure 2 and figure 3, the utility model discloses a bellows restriction valve, including valve body 1 with install the valve plate 3 in valve body 1, axle 7 passes in the pipe 3-3 of valve plate 3, all has corresponding through-hole on valve plate 3 and the axle 7, links together valve plate 3 and axle 7 through bolt 12, reaches axle 7 and rotates valve plate 3 and around the wobbling purpose.

Two ends of a rotating shaft 7 are inserted into the shaft sleeve 6, the shaft sleeve 6 is placed in the bearing seats 4 on two sides of the valve body 1, one side of each bearing seat 4 is used for jacking the shaft sleeve 6 by the blind cover 5 and blocking air leakage of the shaft sleeve 6 and the bearing seat 4. The other side of the shaft sleeve is pressed by a packing gland 11, a sealing packing 10 is arranged in the packing gland 11, and the sealing packing 10 is tightly contacted with the shaft 7 under the extrusion of a through hole gland 9 to play a sealing role. The through hole gland 9 is connected by a stud 8, and the stud 8 is fixed on the bearing seat 4.

The lever 2 is arranged at the tail end of one end of the shaft 7, the shaft 7 rotates after the lever 2 is pulled leftwards and rightwards, and the valve plate 3 swings along with the lever to change an included angle with a lower box plate of the valve body 1 to play a throttling role.

The utility model relates to an air box flow limiting valve which is suitable for the technological characteristics of high air flow temperature, large dust, grate bar falling and the like of an air box at the tail part of a sintering furnace; the tail end of one end of the flap of the valve is provided with a circular arc-shaped plate which is matched with the circular arc-shaped plate on the valve body 1 to play a role in limiting the flow, thereby meeting the requirements of sintering production and overcoming the defects of the prior flap valve; the utility model discloses simple and practical, operate steadily, not stifled valve, high temperature resistant, non-maintaining are applicable to the sintering machine bellows and use.

Claims

1. A wind box flow-limiting valve comprises a valve body consisting of a box body and flanges at two ends of the box body, and a valve plate arranged in the box body, and is characterized in that a closed valve body arc plate is arranged inside the box body of the valve body, two bearing seats are arranged at two sides outside the box body of the valve body, a rotating shaft device is connected with the two bearing seats, the valve plate is connected with the rotating shaft device,

2. The bellows flow-limiting valve according to claim 1, wherein the arc of the flap arc plate is equal to the arc of the valve body arc plate.

3. The bellows constrictor valve of claim 1, wherein the seal cap includes a packing gland and a through-hole gland bolted to the bearing housing, and a seal packing disposed within the packing gland.

4. A bellows restrictor valve as claimed in claim 1, characterized in that the axial center of the shaft is located at any position within a radius of 150mm or less from the center of the valve body.