CN214262296U

CN214262296U - Air duct explosion venting device of coal mill

Info

Publication number: CN214262296U
Application number: CN202022883650.9U
Authority: CN
Inventors: 胡庆权; 唐舜; 张华聪; 高立
Original assignee: Spic Chongqing Hechuan Power Generation Co ltd
Current assignee: Spic Chongqing Hechuan Power Generation Co ltd
Priority date: 2020-12-03
Filing date: 2020-12-03
Publication date: 2021-09-24
Anticipated expiration: 2030-12-03

Abstract

The utility model relates to a coal pulverizer technical field specifically is a coal pulverizer's wind channel explosion venting device, include the explosion venting chamber and the valve of setting in this explosion venting chamber that communicate with the wind channel of coal pulverizer, the side fixedly connected with door-rod on the valve, the upper end of door-rod is followed the moving direction of valve is outwards extended, the cover is equipped with the pretension spring on the door-rod, the fixed cover is connected with the ring flange on the door-rod, through setting up gag lever post, fixture block and adjusting spring isotructure, when reaching the explosion venting pressure that sets for in advance, the fixture block removes the limiting displacement to the gag lever post, and the valve is pushed up by quick this moment, and the valve is opened, and gas vents through explosion venting chamber, accomplishes the explosion venting process; the compression degree of the adjusting rod to the adjusting spring can be adjusted by rotating the adjusting rod, and the thrust required by the retraction of the clamping block is adjusted, so that the explosion venting pressure is adjusted.

Description

Air duct explosion venting device of coal mill

Technical Field

The utility model relates to a coal pulverizer technical field specifically is a device is exploded in wind channel of coal pulverizer.

Background

When a boiler drum and an induced draft fan are abnormally operated in the operation of a thermal power plant unit, a hearth is positioned under an overhigh induced draft pressure head, meanwhile, because the fuel input amount is rapidly reduced or the total fuel is tripped to cause the smoke and the pressure of the hearth to be rapidly reduced, the hearth is imploded (shriveled) due to the combination of the severe working conditions, and under the condition, the hearth is extremely easy to generate permanent deformation and flue explosion.

For example, a chinese patent with patent application No. 2014206157416 discloses an air duct explosion venting device for a coal pulverizer, which includes an explosion venting cavity and a valve, wherein the valve is located at a sealed installation position, and under the action of the air explosion pressure of the air duct, the valve can move in the explosion venting cavity and separate from the sealed installation position to vent explosion; the valve comprises a door rod, a pre-tightening spring is sleeved on the door rod, a flange plate is formed on the door rod, one end of the pre-tightening spring is installed on the shell of the explosion venting cavity, and the other end of the pre-tightening spring is elastically pressed on the flange plate; the air duct explosion venting device further comprises a magnet, and the magnet is attached to the flange plate in a sealing installation position.

Although the air duct explosion venting device of the coal mill can be vented and exploded, the suction force of the magnet is adopted to control the pressure of explosion venting in advance, but the pressure value of explosion venting in advance controlled by the magnet has some defects, when the magnet meets high temperature, the magnetic strength can be changed, the pressure value of explosion venting in advance can be changed, and meanwhile, the magnetic strength of the magnet is changed, an external circuit and a power supply are needed, and the failure rate is high.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides an explosion venting device is let out in coal pulverizer's wind channel.

The utility model provides a its technical problem adopt following technical scheme to realize:

an air duct explosion venting device of a coal mill comprises an explosion venting cavity communicated with an air duct of the coal mill and a valve arranged in the explosion venting cavity, wherein a door rod is fixedly connected to the upper side face of the valve, the upper end of the door rod extends outwards along the moving direction of the valve, a pre-tightening spring is sleeved on the door rod, a flange is fixedly sleeved on the door rod, one end of the pre-tightening spring is installed on a shell of the explosion venting cavity, the other end of the pre-tightening spring is elastically pressed on the flange, a plurality of limiting rods are fixedly connected to the side edge of the flange, the upper side face of each limiting rod is an inclined plane, limiting devices which correspond to the limiting rods one to one are arranged on the side wall of the shell, and the limiting devices are used for limiting the limiting rods; wherein the content of the first and second substances,

the limiting device comprises a sleeve, a clamping block, a piston, an adjusting spring and an adjusting rod; the telescopic one end is fixed to be run through the setting on the casing, sliding connection has the piston in the sleeve, one side fixedly connected with that the piston is close to the gag lever post has the fixture block that corresponds with the gag lever post, the piston passes through regulating spring fixedly connected with regulation pole, be provided with the screw thread on the regulation pole, adjust pole threaded connection on telescopic inner wall.

Preferably, be provided with pressure sensors between adjusting screw and adjusting spring, pressure sensors rotates and installs in one of adjusting the pole and serves, the other end fixed mounting of adjusting the pole has the manometer that is used for showing pressure sensors numerical value, can confirm adjusting spring's compression dynamics through the number of degrees of manometer to calculate the fixture block and compressed required power in advancing the sleeve, and then calculate and let out the pressure when exploding.

Preferably, the equal fixedly connected with L type support in upper and lower both sides of gag lever post, the tip of L type support is rotated and is installed two gyro wheels, gyro wheel roll connection is in the guide way, the vertical setting of guide way is on the inner wall of casing, can the gyro wheel roll along the guide way on the shells inner wall, has guaranteed that the valve is smooth opens the seat and returns the seat, has avoided the jam of valve and guide way.

Preferably, the number of the limiting rods is between two and four.

Preferably, a valve mounting seat is arranged in the shell, and the valve is pressed against the top surface of the valve mounting seat; the top surface of the valve mounting seat is provided with a plurality of groups of elastic sealing rings, the bottom of the valve is provided with a plurality of layers of sealing teeth, and the sealing teeth are pressed into the elastic sealing rings to be sealed in a meshing manner, so that a better sealing effect is realized.

Through adopting foretell technical scheme, the beneficial effects of the utility model are that:

1. by arranging the structures such as the limiting rod, the clamping block, the adjusting spring and the like, when the preset explosion venting pressure is reached, the clamping block relieves the limiting effect on the limiting rod, at the moment, the valve is quickly pushed upwards, the valve is opened, and gas is vented out through the explosion venting cavity to complete the explosion venting process; the compression degree of the adjusting rod to the adjusting spring can be adjusted by rotating the adjusting rod, and the thrust required by the retraction of the clamping block is adjusted, so that the explosion venting pressure is adjusted.

2. Through setting up pressure sensor and manometer, can confirm the compression dynamics of adjusting spring through the number of degrees of manometer to calculate the fixture block and compressed required power in advancing the sleeve, and then calculate and let out the pressure when exploding.

3. Through setting up gyro wheel and guide way, can the gyro wheel roll along the guide way on the shells inner wall, guaranteed the smooth seat of opening of valve and back the seat, avoided the jam of valve and guide way.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a partially enlarged view of B in fig. 1.

In the figure: the explosion venting device comprises an explosion venting cavity 1, a valve 2, a valve rod 3, a pre-tightening spring 4, a flange plate 5, a limiting rod 6, a shell 7, a limiting device 8, a sleeve 81, a clamping block 82, a piston 83, an adjusting spring 84, an adjusting rod 85, a pressure sensor 86, a pressure gauge 87, an L-shaped support 9, a roller 10, a guide groove 11, a valve mounting seat 12, an elastic sealing ring 13 and a plurality of layers of sealing teeth 14.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution:

an air duct explosion venting device of a coal mill comprises an explosion venting cavity 1 communicated with an air duct of the coal mill and a valve 2 arranged in the explosion venting cavity 1, wherein a door rod 3 is fixedly connected to the upper side face of the valve 2, the upper end of the door rod 3 extends outwards along the moving direction of the valve 2, a pre-tightening spring 4 is sleeved on the door rod 3, a flange 5 is fixedly sleeved on the door rod 3, one end of the pre-tightening spring 4 is installed on a shell 7 of the explosion venting cavity 1, the other end of the pre-tightening spring is elastically pressed on the flange 5, a plurality of limiting rods 6 are fixedly connected to the side edge of the flange 5, the upper side face of each limiting rod 6 is an inclined plane, limiting devices 8 which correspond to the limiting rods 6 one by one are arranged on the side wall of the shell 7, and the limiting devices 8 are used for limiting the limiting rods 6; wherein the content of the first and second substances,

the limiting device 8 comprises a sleeve 81, a clamping block 82, a piston 83, an adjusting spring 84 and an adjusting rod 85; the fixed setting that runs through of one end of sleeve 81 is on casing 7, sliding connection has piston 83 in the sleeve 81, one side fixedly connected with that piston 83 is close to gag lever post 6 has the fixture block 82 that corresponds with gag lever post 6, piston 83 passes through regulating spring 84 fixedly connected with regulation pole 85, be provided with the screw thread on the regulation pole 85, adjust pole 85 threaded connection on the inner wall of sleeve 81.

During the use, when the pressure of explosion in the wind channel reaches the pressure that the device of explosion venting of wind channel set for, piston 83 is upwards promoted by gas this moment, ring flange 5 drives gag lever post 6 rebound, gag lever post 6 pushes fixture block 82 inside sleeve 81, adjusting spring 84 is compressed, fixture block 82 removes the limiting displacement to gag lever post 6, valve 2 is pushed up by quick this moment, valve 2 is opened, gaseous is let out through letting out explosion chamber 1, accomplish the process of explosion venting, after the pressure of explosion in the wind channel is let out, atmospheric pressure in the wind channel reduces, pretension spring 4's resilience force pushes back gag lever post 6 to the below of fixture block 82 again, through rotatory adjusting lever 85, can adjust adjusting lever 85 to the compression degree of adjusting spring 84, adjusted fixture block 82 and retrieved required thrust, thereby adjust the pressure of explosion venting.

As an embodiment of the utility model, be provided with pressure sensor 86 between adjusting screw and adjusting spring 84, pressure sensor 86 rotates and installs and serve at one of regulation pole 85, the other end fixed mounting who adjusts pole 85 has the manometer 87 that is used for showing pressure sensor 86 numerical value, can confirm adjusting spring 84's compression dynamics through manometer 87's number of degrees to calculate the required power in fixture block 82 is compressed into sleeve 81, and then calculate and let out the pressure when exploding.

As an embodiment of the utility model, the equal fixedly connected with L type support 9 in upper and lower both sides of gag lever post 6, two gyro wheels 10 are installed in the tip rotation of L type support 9, gyro wheel 10 roll connection is in guide way 11, the vertical setting of guide way 11 can the gyro wheel 10 roll along guide way 11 on the inner wall of casing 7, has guaranteed that valve 2 is smooth opens the seat and has returned the seat, has avoided the jam of valve 2 with guide way 11.

As an embodiment of the present invention, the number of the limiting rods 6 is two to four.

As an embodiment of the present invention, a valve mounting seat 12 is disposed in the housing 7, and the valve 2 is pressed against the top surface of the valve mounting seat 12; the top surface of the valve mounting seat 12 is provided with a plurality of groups of elastic sealing rings 13, the bottom of the valve 2 is provided with a plurality of layers of sealing teeth 14, and the sealing teeth are pressed into the elastic sealing rings 13 to be sealed in a meshing manner, so that a better sealing effect is realized.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, as long as there is no structural conflict, the various features of the disclosed embodiments of the present invention can be used in any combination with each other, and the description of such combinations is not exhaustive in the present specification only for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. The air duct explosion venting device of the coal mill comprises an explosion venting cavity (1) communicated with an air duct of the coal mill and a valve (2) arranged in the explosion venting cavity (1), and is characterized in that a door rod (3) is fixedly connected to the upper side face of the valve (2), the upper end of the door rod (3) extends outwards along the moving direction of the valve (2), a pre-tightening spring (4) is sleeved on the door rod (3), a flange plate (5) is fixedly sleeved on the door rod (3), one end of the pre-tightening spring (4) is installed on a shell (7) of the explosion venting cavity (1), the other end of the pre-tightening spring is elastically pressed on the flange plate (5), a plurality of limiting rods (6) are fixedly connected to the side edge of the flange plate (5), the upper side face of each limiting rod (6) is an inclined face, limiting devices (8) corresponding to the limiting rods (6) one by one are arranged on the side wall of the shell (7), the limiting device (8) is used for limiting the limiting rod (6); wherein the content of the first and second substances,

the limiting device (8) comprises a sleeve (81), a clamping block (82), a piston (83), an adjusting spring (84) and an adjusting rod (85); the one end of sleeve (81) is fixed to be run through and is set up on casing (7), sliding connection has piston (83) in sleeve (81), one side fixedly connected with that piston (83) are close to gag lever post (6) blocks (82) that correspond with gag lever post (6), piston (83) are through regulating spring (84) fixedly connected with regulation pole (85), be provided with the screw thread on adjusting pole (85), adjust pole (85) threaded connection on the inner wall of sleeve (81).

2. The air duct explosion venting device of the coal mill as claimed in claim 1, wherein: a pressure sensor (86) is arranged between the adjusting rod and the adjusting spring (84), the pressure sensor (86) is rotatably arranged at one end of the adjusting rod (85), and a pressure gauge (87) for displaying the numerical value of the pressure sensor (86) is fixedly arranged at the other end of the adjusting rod (85).

3. The air duct explosion venting device of the coal mill as claimed in claim 1, wherein: the equal fixedly connected with L type support (9) in upper and lower both sides of gag lever post (6), the tip of L type support (9) is rotated and is installed two gyro wheels (10), gyro wheel (10) roll connection is in guide way (11), the vertical setting of guide way (11) is on the inner wall of casing (7).

4. The air duct explosion venting device of the coal mill as claimed in claim 3, wherein: the number of the limiting rods (6) is between two and four.

5. The air duct explosion venting device of the coal mill as claimed in claim 1, wherein: a valve mounting seat (12) is arranged in the shell (7), and the valve (2) is pressed against the top surface of the valve mounting seat (12); the valve is characterized in that a plurality of groups of elastic sealing rings (13) are arranged on the top surface of the valve mounting seat (12), a plurality of layers of sealing teeth (14) are formed at the bottom of the valve (2), and the sealing teeth are pressed into the elastic sealing rings (13) to be sealed in a meshing manner.