CN216078454U

CN216078454U - Check air door for power plant

Info

Publication number: CN216078454U
Application number: CN202122192345.XU
Authority: CN
Inventors: 颜宗耀; 谭向群; 王春蕾
Original assignee: Datang luoyang shouyangshan power plant
Current assignee: Datang luoyang shouyangshan power plant
Priority date: 2021-09-10
Filing date: 2021-09-10
Publication date: 2022-03-18
Anticipated expiration: 2031-09-10

Abstract

The utility model provides a check damper for a power plant. Contrary air door for power plant includes: the door frame is provided with a partition plate, the partition plate divides the frame into two installation cavities, air holes are formed in the partition plate, four sealing doors are symmetrically installed on the door frame, one side of the door frame is provided with a vacuum pump, and the vacuum pump is communicated with the corresponding installation cavities; the actuating mechanism comprises an air cylinder, a gear groove is installed at the output end of the air cylinder, and a rotating shaft is installed on one side of the door frame. The check damper for the power plant provided by the utility model is provided with the four sealing doors, and the two sealing doors form secondary sealing, so that the possibility that toxic gas leaks to the other end of the pipeline to harm maintenance personnel due to poor sealing is effectively reduced, the sealing effect on the pipeline can be enhanced by arranging the vacuum pump, and meanwhile, when sealing leakage occurs, the leaked toxic gas can be pumped out, and the toxic gas is prevented from entering the other side of the sealing doors.

Description

Check air door for power plant

Technical Field

The utility model relates to the technical field of air doors, in particular to a non-return air door for a power plant.

Background

At present, flue or air duct system flow control equipment on domestic and foreign power station boiler basically selects for use shutter type baffle air door, adopt the mode of perpendicular installation to install, it is as the isolated baffle air door of usefulness of fan export, have very important effect, can prevent that the condition of gas backward flow from taking place, but this kind of shutter type's baffle air door is because the more loss that causes flow resistance very easily of door plant, when the staff overhauls it simultaneously, also there is the condition that work load is big and work burden is heavy, so need have the novel electronic contrary wind-stopping of security simultaneously to the simplification of this kind of design.

The patent document of grant bulletin No. CN 206593124U discloses an electronic contrary air door that ends, including the pipeline, the inboard parcel of pipeline has the pipe-line seal layer, the equal fixedly connected with curb plate in inboard both ends of pipe-line seal layer, the inboard upper end of curb plate and the equal fixedly connected with baffle of inboard lower extreme, the inboard surface of curb plate and the inboard surface of baffle all glue and have the door plant sealing layer, the inboard of door plant sealing layer is equipped with contrary air door that ends, the seam crossing of contrary air door glues and have a seam sealing layer, the positive fixedly connected with main fixed block of contrary air door that ends, the fixed surface of main fixed block is connected with the main shaft, the spindle drum has been cup jointed on the surface of main shaft, the upper end fixedly connected with location axle of spindle drum. This electronic contrary air door that ends has improved the more condition of traditional pneumatic contrary air door plant that ends for door plant quantity can reduce, has also made things convenient for technical worker's maintenance work simultaneously, has improved technical worker's work efficiency.

However, the above scheme still has the following disadvantages: this scheme adopts to run from opposite directions the door and install perpendicularly in horizontal flue, in case sealed not tight, takes place to leak more easily, makes the toxic gas in the boiler flue reveal to the opposite side of air door, endangers maintainer's life safety.

Therefore, it is necessary to provide a back draft damper for a power plant to solve the above technical problems.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide a non-return air door for a power plant.

In order to solve the technical problem, the utility model provides a check damper for a power plant, which comprises: the door frame is provided with a partition plate, the partition plate divides the door frame into two installation cavities, air holes are formed in the partition plate, four sealing doors are symmetrically installed on the door frame, one side of the door frame is provided with a vacuum pump, and the vacuum pump is communicated with the corresponding installation cavities;

actuating mechanism includes the cylinder, the gear groove is installed to the output of cylinder, the pivot is installed to one side of door frame, the pivot with sealing door connects.

Preferably, a sealing ring is installed around the installation cavity, and the sealing ring is matched with the sealing door.

Preferably, a pressure sensor is mounted on the inner wall of the mounting cavity.

Compared with the prior art, the non-return air door for the power plant provided by the utility model has the following beneficial effects:

(1) through setting up four sealing door, twice sealing door forms the secondary seal, effectively reduces sealed not tight and leads to having toxic gas to leak to the pipeline other end harm maintainer's possibility, can strengthen the sealed effect to the pipeline through setting up the vacuum pump, also can bleed the toxic gas of leakage simultaneously when taking place sealed the leakage, prevents that toxic gas from getting into the opposite side of sealing door.

(2) Through setting up pressure sensor, the sealed effect of judgement sealing door that can be comparatively convenient accurate.

Drawings

FIG. 1 is a schematic top view of a back draft damper for a power plant according to the present invention;

FIG. 2 is a schematic sectional top view of the back draft damper for the power plant of FIG. 1;

reference numbers in the figures: 1. door frame, 2, baffle, 3, installation cavity, 4, vacuum pump, 5, cylinder, 6, gear groove, 7, pivot, 10, solid fixed ring, 11, sealing washer, 12, pressure sensor, 13, installation cavity.

Detailed Description

The utility model is further described with reference to the following figures and embodiments.

Referring to fig. 1 and 2 in combination, in an embodiment of the present invention, a back draft damper for a power plant includes: the door comprises a door frame 1 and four driving mechanisms, wherein a partition plate 2 is arranged on the door frame 1, the door frame 1 is equally divided into two installation cavities 13 by the partition plate 2, air holes are formed in the partition plate 2, four sealing doors 3 are symmetrically arranged on the door frame 1, a vacuum pump 4 is arranged on one side of the door frame 1, and the vacuum pump 4 is communicated with the corresponding installation cavities 13; actuating mechanism includes cylinder 5, gear groove 6 is installed to the output of cylinder 5, pivot 7 is installed to one side of door frame 1, pivot 7 with sealing door 3 is connected, gear groove 6 passes through gear drive pivot 7 rotates.

After 5 starts, through the drive of gear groove 6 pivot 7 rotates, rotates 7 horizontal direction and rotates and open sealing door 3, otherwise sealing door 3 closes, then vacuum pump 4 bleeds in to installation cavity 13, reduces 3 interior atmospheric pressure of installation cavity, strengthens the purpose of the sealed effect of sealing door 3 greatly, in case when sealed not good, also can leak the gas that gets into the installation cavity through the extraction, prevents that toxic gas from seeing through sealing door 3 admission line opposite side.

Through setting up four sealing door 3, twice sealing door 3 forms the secondary seal, effectively reduces sealed not tight and leads to having toxic gas to leak to the pipeline other end harm maintainer's possibility, can strengthen the sealed effect to the pipeline through setting up vacuum pump 4, also can bleed the toxic gas of leakage simultaneously when taking place sealed the leakage, prevents that toxic gas from getting into sealing door 3's opposite side.

As shown in fig. 2, a sealing ring 11 is installed around the installation cavity 13, the sealing ring 11 is adapted to the sealing door 3, and when the sealing door 3 is in a closed state, the sealing ring 11 plays a role in sealing.

By arranging the sealing ring 11, a sealing effect is achieved.

As shown in fig. 2, a pressure sensor 12 is installed on the inner wall of the installation cavity 13, and in a sealed state, after air extraction and pressure reduction, the pressure sensor 12 detects the air pressure in the installation cavity 13 and feeds back the change of the air pressure in real time, so as to determine whether the sealing of the sealing door 3 is failed.

Through setting up pressure sensor 12, can be comparatively convenient accurate judgement sealing door 3's sealed effect.

Claims

1. The utility model provides a contrary air door for power plant which characterized in that includes:

the door frame is provided with a partition plate, the partition plate divides the door frame into two installation cavities, air holes are formed in the partition plate, four sealing doors are symmetrically installed on the door frame, one side of the door frame is provided with a vacuum pump, and the vacuum pump is communicated with the corresponding installation cavities;

2. The back draft damper for a power plant according to claim 1, wherein a sealing ring is installed around the installation cavity, and the sealing ring is adapted to the sealing door.

3. The backdraft damper for a power plant of claim 1, wherein a pressure sensor is mounted on an inner wall of the mounting cavity.