CN213040546U

CN213040546U - Main steam overpressure protection device for thermal power plant boiler

Info

Publication number: CN213040546U
Application number: CN202022005285.1U
Authority: CN
Inventors: 程高品
Original assignee: Ordos Special Equipment Inspection & Testing Institution
Current assignee: Ordos Branch Of Inner Mongolia Special Equipment Inspection And Research Institute
Priority date: 2020-09-15
Filing date: 2020-09-15
Publication date: 2021-04-23
Anticipated expiration: 2030-09-15

Abstract

The utility model belongs to the technical field of boiler equipment, in particular to a main steam overpressure protection device of a thermal power plant boiler, which comprises a first connecting flange, wherein a connecting pipeline is welded on the first connecting flange, the upper pipeline of the connecting pipeline is connected with a safety valve, the safety valve is provided with an exhaust port, the exhaust port pipeline is connected with a buffer tube, the buffer tube comprises a plurality of lower convex tubes, the number of the lower convex tubes is even and is not less than two, an upper convex tube is arranged between two adjacent lower convex tubes, the lower convex tube is in a V shape, the upper convex tube is in an inverted V shape, the two ends of the upper convex tube are respectively welded and fixed with the opposite ends of the lower convex tubes at the two sides and are positioned at the same axis, a plurality of buffer plates which are distributed in a cross way are arranged at the upper side and the lower side of the inner surface of the buffer, one side of the cooling pipe close to the safety valve is connected with a water outlet pipe.

Description

Main steam overpressure protection device for thermal power plant boiler

Technical Field

The utility model belongs to the technical field of boiler equipment, concretely relates to boiler main steam overpressure protection device of thermal power plant.

Background

The boiler is an energy conversion device, the energy input to the boiler comprises chemical energy and electric energy in fuel, and the boiler outputs steam, high-temperature water or an organic heat carrier with certain heat energy. The boiler is a water container heated on fire, a furnace is a place where fuel is combusted, and the boiler comprises a boiler and a furnace. The hot water or steam generated in the boiler can directly provide heat energy for industrial production and people life, and can also be converted into mechanical energy through a steam power device, or the mechanical energy is converted into electric energy through a generator. The boiler for supplying hot water is called a hot water boiler, is mainly used for life, and has a small amount of application in industrial production. The boiler for generating steam is called as a steam boiler, often called as a boiler for short, and is widely used for thermal power stations, ships, locomotives and industrial and mining enterprises.

The boiler often appears superpressure phenomenon in the course of the work, and current superpressure protection is usually protected through the installation relief valve, and when making the inside pressure of boiler too big, the relief valve is opened automatically to the relief pressure, however such mode can directly discharge the inside high temperature high-pressure gas of boiler, and the high temperature high-pressure gas brings very big safety hazard to equipment itself, computer lab and human body.

SUMMERY OF THE UTILITY MODEL

The utility model aims at: aims to provide a main steam overpressure protection device for a boiler of a thermal power plant to solve the problems in the background technology.

In order to realize the technical purpose, the utility model discloses a technical scheme as follows:

a main steam overpressure protection device for a boiler in a thermal power plant comprises a first connecting flange, a connecting pipeline is welded on the first connecting flange, a safety valve is connected to the upper side pipeline of the connecting pipeline, an exhaust port is formed in the safety valve, a buffer pipe is connected to the exhaust port pipeline, the buffer pipe comprises a plurality of lower convex pipes, the number of the lower convex pipes is even and is not less than two, an upper convex pipe is arranged between every two adjacent lower convex pipes, the lower convex pipes are V-shaped and inverted V-shaped, two ends of each upper convex pipe are respectively welded and fixed with one ends, opposite to the lower convex pipes, of two sides and located on the same axis, a plurality of buffer plates which are distributed in a crossed mode are arranged on the upper side and the lower side of the inner surface of the buffer pipe, matched cooling pipes are sleeved on the outer sides of the buffer pipes, two ends of each cooling pipe are respectively fixedly connected with two ends, the water inlet pipe is connected with a water pump, one side of the cooling pipe, which is close to the safety valve, is connected with a water outlet pipe, and the water outlet pipe is connected with water utilization equipment.

By adopting the technical scheme of the utility model, first connecting flange is used for connecting pipeline and relief valve to the boiler, through the hexagonal adjusting nut who rotates the regulation relief valve, adjusts the default of relief valve, thereby makes when the atmospheric pressure of boiler inside is higher than the default of relief valve, the relief valve can be opened automatically, discharges the inside high pressure from the gas vent, thereby makes the pressure of boiler inside fall below the default, after the internal pressure of boiler reduces below the default, the relief valve self-closing, thereby carry out superpressure protection to the boiler, stabilize internal pressure simultaneously;

when high-pressure high-temperature gas discharged during pressure relief of the boiler passes through the buffer tube, on one hand, the high-pressure gas can be buffered and decompressed through the buffer plates on the upper side and the lower side of the inner surface of the buffer tube, and on the other hand, the high-pressure gas can pass through the corners of the lower convex tube and the upper convex tube of the buffer tube, so that the pressure of the high-pressure gas is further buffered and weakened, the pressure of the high-pressure gas is weakened, and the high-pressure gas is prevented from being directly discharged;

the cooling pipe is matched with the buffer pipe in shape and sleeved outside the buffer pipe, so that cold water can be introduced into the water inlet pipe by connecting the cold water into the water inlet pipe through the water pump, the buffer pipe is cooled, high-temperature gas is cooled and is finally discharged through the water outlet pipe, meanwhile, the flow direction of the water inlet pipe and the flow direction of the water outlet pipe are opposite to the flow direction of the gas, so that the heat exchange efficiency of the high-temperature gas is better, the cooling effect of the high-temperature gas is better, and hot water after heat exchange and temperature rise can be supplied to water-using equipment for;

the utility model discloses a cooperation of buffer tube and cooling tube can carry out the decompression cooling with the high temperature high-pressure gas that the relief valve was discharged to can prevent that the high temperature high-pressure gas of boiler from directly discharging, solve the direct discharge back of high temperature high-pressure gas, bring the problem of harm to equipment, computer lab and human body.

Further, the angle of rotation of the lower convex pipe and the angle of rotation of the upper convex pipe are the same and are both 40-60 degrees. The structure is convenient to process, and high-pressure gas exhausted by the safety valve can be better buffered and weakened.

Further limiting, the safety valve and the connecting pipeline as well as the buffer tube and the exhaust port are connected by flanges. By adopting the structure, the connection structure between the safety valve and the connecting pipeline and between the buffer tube and the exhaust port is simple, and the installation and the disassembly are convenient.

Further inject, the internal surface downside the buffer board all is equipped with the hole that leaks, the lower flange corner is equipped with the drain pipe, the drain pipe is equipped with manual ball valve. Such structure, after the inside high-temperature gas cooling of buffer tube, people can open the comdenstion water of leaving over in the buffer tube when manual ball valve makes the high-temperature gas cooling and flow to the drain pipe through the hole that leaks and discharge.

Further inject, the buffer tube both ends all are equipped with the bracing piece, the bracing piece downside is equipped with second flange. With such a structure, the support rod flange can support the buffer tube after being fixed by the second connecting flange.

Further limit, the connecting pipeline side still is equipped with temperature transmitter and pressure transmitter. With the structure, the temperature condition inside the connecting pipeline can be monitored in real time through the temperature transmitter, and the pressure condition inside the connecting pipeline can be monitored in real time through the pressure transmitter.

Compared with the prior art, the utility model has the following advantages:

through the cooperation of buffer tube and cooling tube, can carry out the decompression cooling with the high temperature high-pressure gas that the relief valve was discharged, prevent that the high temperature high-pressure gas of boiler from directly discharging, avoided the direct discharge back of high temperature high-pressure gas, bring the problem of harm to equipment, computer lab and human body.

Drawings

The present invention can be further illustrated by the non-limiting examples given in the accompanying drawings;

fig. 1 is a schematic view of a partial cross-sectional structure of an embodiment of a main steam overpressure protection device of a boiler of a thermal power plant;

FIG. 2 is an enlarged view of the structure at A in FIG. 1;

the main element symbols are as follows:

the device comprises a first connecting flange 1, a connecting pipeline 11, a temperature transmitter 111, a pressure transmitter 112, a safety valve 12, an exhaust port 121, a buffer pipe 13, a lower convex pipe 131, an upper convex pipe 132, a buffer plate 133, a water leakage hole 134, a drain pipe 135, a manual ball valve 136, a cooling pipe 14, a water inlet pipe 15, a water outlet pipe 16, a support rod 17 and a second connecting flange 171.

Detailed Description

In order to make the present invention better understood by those skilled in the art, the technical solutions of the present invention are further described below with reference to the accompanying drawings and examples.

As shown in fig. 1 and fig. 2, the main steam overpressure protection device for a thermal power plant boiler of the present invention comprises a first connection flange 1, a connection pipe 11 is welded to the first connection flange 1, a safety valve 12 is connected to an upper side pipe of the connection pipe 11, the safety valve 12 is provided with an exhaust port 121, the exhaust port 121 is connected to a buffer pipe 13, the buffer pipe 13 comprises a plurality of lower convex pipes 131, the number of the lower convex pipes 131 is even and is not less than two, an upper convex pipe 132 is arranged between two adjacent lower convex pipes 131, the lower convex pipe 131 is in a "V" shape, the upper convex pipe 132 is in an inverted "V" shape, two ends of the upper convex pipe 132 are respectively welded and fixed to one end of the lower convex pipes 131 at two sides and are located on the same axis, a plurality of cross-distributed cooling plates 133 are arranged on the upper and lower sides of the inner surface of the buffer pipe 13, a matched cooling pipe 14 is, one side of the cooling pipe 14, which is far away from the safety valve 12, is connected with a water inlet pipe 15, the water inlet pipe 15 is connected with a water pump through a pipeline, one side of the cooling pipe 14, which is close to the safety valve 12, is connected with a water outlet pipe 16, and the water outlet pipe 16 is connected with a water using device through a pipeline.

Adopt the utility model discloses technical scheme, first connecting flange 1 is used for being connected to connecting tube 11 and relief valve 12 to the boiler, through the hexagonal adjusting nut who rotates regulation relief valve 12, adjust the default of relief valve 12, thereby make when the atmospheric pressure inside the boiler is higher than the default of relief valve 12, relief valve 12 can open automatically, let out the high pressure of inside from gas vent 121, thereby make the pressure inside the boiler fall below the default, after the pressure in the boiler reduces below the default, relief valve 12 self-closing, thereby carry out the superpressure protection to the boiler, stabilize internal pressure simultaneously;

when high-pressure high-temperature gas discharged during pressure relief of the boiler passes through the buffer tube 13, on one hand, the high-pressure gas can be buffered and decompressed through the buffer plates 133 on the upper and lower sides of the inner surface of the buffer tube 13, and on the other hand, the high-pressure gas can pass through the corners of the lower convex tube 131 and the upper convex tube 132 of the buffer tube 13, so that the pressure of the high-pressure gas is further buffered and weakened, and the high-pressure gas is prevented from being directly discharged;

the cooling pipe 14 is matched with the buffer pipe 13 in shape and sleeved outside the buffer pipe 13, so that cold water can be introduced into the water inlet pipe 15 by connecting the cold water into the water inlet pipe 15 through the water pump, the buffer pipe 13 is cooled, high-temperature gas is cooled and cooled, and finally the high-temperature gas is discharged from the water outlet pipe 16, meanwhile, the flow directions of the water inlet pipe 15 and the water outlet pipe 16 are opposite to the flow direction of the gas, so that the heat exchange efficiency of the high-temperature gas is better, the cooling effect of the high-temperature gas is better, and hot water after heat exchange and temperature rise can be supplied to water equipment;

the utility model discloses a buffer tube 13 and cooling tube 14's cooperation can carry out the decompression cooling with the high temperature high-pressure gas that the relief valve was discharged to can prevent the direct discharge of high temperature high-pressure gas of boiler, solve the direct discharge back of high temperature high-pressure gas, bring the problem of harm to equipment, computer lab and human body.

Specifically, the angle of rotation of the lower convex pipe 131 is the same as that of the upper convex pipe 132, and both angles are 40-60 degrees. With such a structure, the lower and

upper flanges

131 and 132 can be easily processed, and the high-pressure gas discharged from the relief valve 12 can be better buffered and attenuated. In fact, other configurations are contemplated as appropriate to facilitate machining of lower and

upper flanges

131, 132.

Specifically, the safety valve 12 and the connecting pipeline 11, and the buffer tube 13 and the exhaust port 121 are connected by flanges. With such a structure, the connection structure between the safety valve 12 and the connection pipe 11 and between the buffer tube 13 and the exhaust port 121 is simplified, and the installation and removal are facilitated. In fact, other structures are also conceivable according to circumstances, so that the connection structure between the safety valve 12 and the connection pipe 11 and between the buffer tube 13 and the exhaust port 121 is simple and easy to install and remove.

Specifically, the buffer plate 133 on the lower side of the inner surface is provided with water leakage holes 134, the corner of the lower flange 131 is provided with a drain pipe 135, and the drain pipe 135 is provided with a manual ball valve 136. With such a structure, after the high-temperature gas inside the buffer tube 13 is cooled, people can open the manual ball valve 136 to cool the high-temperature gas, and the condensed water left in the buffer tube 13 flows to the drain pipe 135 through the water leakage hole 134 to be discharged. In fact, other configurations are also conceivable as the case may be, so that the condensed water remaining in the buffer tube 13 when the high-temperature gas is cooled can be discharged.

Specifically, support rods 17 are arranged at two ends of the buffer tube 13, and a second connecting flange 171 is arranged at the lower side of each support rod 17. With this structure, the support rod 17 can support the buffer tube 131 after being flange-fixed by the second connection flange 171. In fact, other configurations are contemplated as appropriate to support the buffer tube 13.

Specifically, a temperature transmitter 111 and a pressure transmitter 112 are further arranged on the side surface of the connecting pipe 11. With such a configuration, the temperature condition inside the connecting pipe 11 can be monitored in real time by the temperature transmitter 111, and the pressure condition inside the connecting pipe 11 can be monitored in real time by the pressure transmitter 112. In fact, other structures can be used according to the situation, and the temperature situation and the pressure situation inside the connecting pipeline 11 can be monitored in real time.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. The utility model provides a boiler main steam overpressure protection device of thermal power plant, includes first flange (1), connecting tube (11) have been welded in first flange (1), connecting tube (11) upside pipe connection has relief valve (12), relief valve (12) are equipped with gas vent (121), its characterized in that: the exhaust port (121) is connected with a buffer pipe (13) through a pipeline, the buffer pipe (13) comprises a plurality of lower convex pipes (131), the number of the lower convex pipes (131) is even and is not less than two, an upper convex pipe (132) is arranged between every two adjacent lower convex pipes (131), the lower convex pipes (131) are V-shaped, the upper convex pipes (132) are inverted V-shaped, two ends of each upper convex pipe (132) are respectively welded and fixed with one end, opposite to the lower convex pipes (131) on two sides, of each upper convex pipe and are positioned on the same axis, a plurality of buffer plates (133) which are distributed in a crossed mode are arranged on the upper side and the lower side of the inner surface of the buffer pipe (13), the cooling pipe (14) is sleeved on the outer side of the buffer pipe (13) in a matched mode, two ends of each cooling pipe (14) are respectively fixedly connected with two ends of the buffer pipe (13), and one side, the water inlet pipe (15) is connected with a water pump through a pipeline, one side, close to the safety valve (12), of the cooling pipe (14) is connected with a water outlet pipe (16), and the water outlet pipe (16) is connected with water using equipment through a pipeline.

2. The main steam overpressure protection device of the thermal power plant boiler as claimed in claim 1, characterized in that: the angle of rotation of the lower convex pipe (131) is the same as that of the upper convex pipe (132), and the angle of rotation is 40-60 degrees.

3. The main steam overpressure protection device of the thermal power plant boiler as claimed in claim 1, characterized in that: and the safety valve (12) and the connecting pipeline (11) and the buffer tube (13) and the exhaust port (121) are connected by flanges.

4. The main steam overpressure protection device of the thermal power plant boiler as claimed in claim 1, characterized in that: the internal surface downside buffer board (133) all are equipped with hole (134) that leaks, protruding pipe (131) corner down is equipped with drain pipe (135), drain pipe (135) are equipped with manual ball valve (136).

5. The main steam overpressure protection device of the thermal power plant boiler as claimed in claim 1, characterized in that: the buffer tube (13) both ends all are equipped with bracing piece (17), bracing piece (17) downside is equipped with second flange (171).

6. The main steam overpressure protection device of the thermal power plant boiler as claimed in claim 1, characterized in that: and a temperature transmitter (111) and a pressure transmitter (112) are also arranged on the side surface of the connecting pipeline (11).