CN217233610U

CN217233610U - Thermal power plant thermal control system

Info

Publication number: CN217233610U
Application number: CN202220508886.0U
Authority: CN
Inventors: 曲文秀; 米万生; 邱影
Original assignee: 703th Research Institute of CSIC
Current assignee: 703th Research Institute of CSIC
Priority date: 2022-03-09
Filing date: 2022-03-09
Publication date: 2022-08-19
Anticipated expiration: 2032-03-09

Abstract

An object of the utility model is to provide a thermal power plant thermal control system, including intermediate pressure jar, low-pressure cylinder, be provided with communicating pipe between intermediate pressure jar and the low-pressure cylinder, keep away from low-pressure cylinder one side communicating pipe and connect the exhaust tube, set gradually relief valve, pneumatic check valve, fast governing valve, electronic shutoff valve on the exhaust tube. The utility model discloses a relief valve, pneumatic check valve, the fast governing valve of closing and the electronic shut-off valve that set up on the exhaust tube guarantee to get into the steam flow of low pressure jar through communicating pipe in the unit. The communicating pipe is sleeved with a heat supply butterfly valve, and the heat supply steam extraction amount can be correspondingly adjusted by adjusting the opening degree of the heat supply butterfly valve. A pressure difference protector is arranged between two stages of blades at the tail end of the first blade and used for preventing overload of blade load caused by too low heating extraction pressure, and meanwhile, anti-corrosion layers are arranged on two stages of blades at the tail end of the second blade, so that the service life of the blade is prolonged.

Description

Thermal power plant thermal control system

Technical Field

The utility model relates to a thermal control system, specifically speaking are thermal power plant's thermal control system.

Background

A thermal power plant, which is called a thermal power plant for short, is a plant for producing electric energy by using combustible materials (such as coal) as fuel, and the basic production process is as follows: the fuel is heated to generate steam during combustion, chemical energy of the fuel is converted into heat energy, the steam pressure drives a steam turbine to rotate, the heat energy is converted into mechanical energy, then the steam turbine drives a generator to rotate, and the mechanical energy is converted into electric energy.

The prior device is only provided with a communicating pipe between the intermediate pressure cylinder and the low pressure cylinder. The flow of steam entering between the low pressure cylinders cannot be controlled by a communicating pipe.

Disclosure of Invention

An object of the utility model is to provide a thermal power plant's thermal control system through the steam flow of low pressure communicating pipe in can guaranteeing single unit.

The purpose of the utility model is realized like this:

the utility model relates to a thermal power plant thermal control system, characterized by: the automatic control system comprises an intermediate pressure cylinder and a low pressure cylinder, wherein a communicating pipe is arranged between the intermediate pressure cylinder and the low pressure cylinder, one side, far away from the low pressure cylinder, of the communicating pipe is connected with an exhaust pipe, and a safety valve, a pneumatic check valve, a quick-closing regulating valve and an electric shutoff valve are sequentially arranged on the exhaust pipe.

The utility model discloses can also include:

1. one side of the upper end of the intermediate pressure cylinder of the communicating pipe is provided with a heat supply butterfly valve.

2. The heat supply butterfly valve is an electric butterfly valve with an adjusting function.

3. The quick-closing regulating valve is a hydraulic regulating valve.

4. A group of first blades is arranged in the intermediate pressure cylinder, and a differential pressure protector is arranged between two stages of blades at the tail end of each first blade.

5. Two groups of second blades are arranged inside the low-pressure cylinder, the two groups of second blades are symmetrically arranged, and anti-corrosion layers are sprayed on two stages of tail end blades of the second blades.

The utility model has the advantages that:

1. the utility model discloses at the new-increased exhaust tube in communicating pipe one side, the cover is equipped with relief valve, pneumatic check valve, fast governing valve and the electronic shutoff valve in proper order simultaneously on the exhaust tube, guarantees through relief valve, pneumatic check valve, the fast governing valve of closing and the electronic shutoff valve that set up on the exhaust tube that the steam flow that gets into the low pressure jar in the single unit through communicating pipe.

2. The utility model discloses the cover is equipped with the heat supply butterfly valve on communicating pipe, can come the adjustment heat supply extraction steam volume that corresponds through the adjustment to heat supply butterfly valve aperture.

3. The utility model discloses be provided with pressure differential protection ware between the terminal two-stage blade of first blade, be used for preventing that heating extraction pressure is crossed low and is caused blade load overload, all be provided with anti-corrosion coating simultaneously on the terminal two-stage blade of second blade, increase its life.

Drawings

FIG. 1 is a schematic drawing of the air extraction of the present invention;

fig. 2 is a schematic perspective view of the present invention;

fig. 3 is a schematic diagram of the internal structure of the present invention.

Detailed Description

The invention will be described in more detail below by way of example with reference to the accompanying drawings:

with reference to fig. 1-3, the utility model discloses a medium pressure cylinder 1, medium pressure cylinder 1 one side is provided with low pressure cylinder 2, is provided with communicating pipe 3 between medium pressure cylinder 1 and the low pressure cylinder 2, and communicating pipe 3 is the flow path of steam between medium pressure cylinder 1 and the low pressure cylinder 2, and one side that low pressure cylinder 2 was kept away from to communicating pipe 3 is provided with exhaust tube 4, and the inside first blade 10 of group that is provided with of medium pressure cylinder 1, the inside two sets of second blades 12 that is provided with of low pressure cylinder 2.

The upper end of the air exhaust pipe 4 is provided with a safety valve 5, a pneumatic check valve 6, a quick-closing regulating valve 7 and an electric shutoff valve 8 from the right side to the left side, the safety valve 5 is used for discharging media outside the system, when the pressure of the media in the equipment or the pipeline rises to exceed a specified value, the safety valve 5 can be started, the pneumatic check valve 6 can prevent the backflow of steam, the quick-closing regulating valve 7 is a hydraulic regulating valve and is used for regulating the air exhaust flow rate and simultaneously avoiding the pouring of the steam, the electric shutoff valve 8 is used for controlling the cutting off or the circulation of the media in the pipeline, the quick-closing regulating valve 7 is hydraulically regulated, one side of the upper end of the intermediate pressure cylinder 1 of the communicating pipe 3 is sleeved with a heat supply butterfly valve 9, the valve of the heat supply butterfly valve 9 is an electric butterfly valve with a regulating function, the electric butterfly valve controls the opening and closing of the butterfly valve through a power supply signal and can be used as a cut-off valve of the pipeline system, the control valve and the check valve, a pressure difference protector 11 is arranged between two stages of the blades at the tail end of the first blade 10, the pressure difference protector 11 is used for balancing pressure, the two second blades 12 are symmetrically arranged, and the two-stage blades at the tail ends of the two second blades 12 are provided with the anti-corrosion layers 13 in a spraying mode.

The working principle is as follows: the device is when using, steam through intermediate pressure jar 1 gets into 2 insides of low pressure jar through communicating pipe 3, steam is when 3 inside circulations communicating pipe, the relief valve 5 of establishing is gone up to cover on 3 one side setting communicating pipe's exhaust tube 4 and exhaust tube 4, pneumatic check valve 6, fast closing control valve 7 and electronic shutoff valve 8 can be controlled the steam flow that gets into 2 of low pressure jar through communicating pipe 3, and, still the cover is equipped with heat supply butterfly valve 9 on communicating pipe 3, can correspond the adjustment and adjust heat supply extraction volume through the adjustment to heat supply butterfly valve 9 aperture.

Claims

1. A thermal power plant thermal control system is characterized in that: the automatic air-suction valve comprises an intermediate pressure cylinder and a low pressure cylinder, wherein a communicating pipe is arranged between the intermediate pressure cylinder and the low pressure cylinder, one side, far away from the low pressure cylinder, of the communicating pipe is connected with an air suction pipe, and a safety valve, a pneumatic check valve, a quick-closing regulating valve and an electric shutoff valve are sequentially arranged on the air suction pipe.

2. A thermal power plant thermal control system according to claim 1, wherein: one side of the upper end of the intermediate pressure cylinder of the communicating pipe is provided with a heat supply butterfly valve.

3. A thermal power plant thermal control system according to claim 2, wherein: the heat supply butterfly valve is an electric butterfly valve with an adjusting function.

4. A thermal power plant thermal control system according to claim 1, wherein: the quick-closing regulating valve is a hydraulic regulating valve.

5. A thermal power plant thermal control system according to claim 1, wherein: a group of first blades is arranged in the intermediate pressure cylinder, and a differential pressure protector is arranged between two stages of blades at the tail end of each first blade.

6. A thermal power plant thermal control system according to claim 1, wherein: two groups of second blades are arranged inside the low-pressure cylinder, the two groups of second blades are symmetrically arranged, and anti-corrosion layers are sprayed on two stages of tail end blades of the second blades.