CN212774425U

CN212774425U - High-pressure steam inlet nozzle for steam turbine set

Info

Publication number: CN212774425U
Application number: CN202021352354.XU
Authority: CN
Inventors: 任曙光; 郜海山; 徐延长
Original assignee: Inner Mongolia Energy Generating Investment Group Co ltd
Current assignee: Inner Mongolia Energy Generating Investment Group Co ltd
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2021-03-23
Anticipated expiration: 2030-07-10

Abstract

The utility model discloses a high-pressure admission nozzle for turboset, including the nozzle body, one side of nozzle body is equipped with the impeller, is fixed with the blade on the impeller, and the one end of blade is located the nozzle body under, the top of nozzle body is connected with the elbow, and the one end that the nozzle body was kept away from to the elbow is connected with the connecting pipe, and one side of connecting pipe is equipped with the combustion chamber, and the one end that the elbow was kept away from to the connecting pipe is fixed in on the combustion chamber inner wall, the outer wall bottom of connecting pipe is fixed with the mounting panel, and the bottom of mounting panel is fixed with the limiting plate, and the limiting plate is semi-circular structure, is equipped with the spacing groove on the lateral wall of limiting plate, and the bottom one end that the limiting plate was kept away from to the mounting panel is fixed with electric putter, and. The utility model discloses simple structure, convenient to use has reduced the energy resource consumption of steam turbine, has prolonged the life of steam turbine.

Description

High-pressure steam inlet nozzle for steam turbine set

Technical Field

The utility model relates to a nozzle technical field especially relates to a high pressure admission nozzle for turboset.

Background

An impulse turbine is used as a prime mover of a heat recovery and energy-saving device and applied to industries such as petroleum, chemical industry, coal-to-liquid, electric power, metallurgy, power generation and the like. The nozzle ring of the steam turbine is an important part which can effectively convert the heat energy of a steam chamber into kinetic energy and play a certain role in guiding the steam flow. The nozzle ring of the steam turbine is a part bearing the highest steam temperature in the through-flow part of the steam turbine and is also a main part for the steam turbine to do work, and the processing quality of the nozzle ring not only influences the running performance of the steam turbine, but also influences the heat energy conversion rate of the steam turbine.

At present, when a steam turbine is just started, the gas pressure in a combustion chamber of the steam turbine cannot reach a set standard, low-pressure gas is blown to an impeller through a nozzle, the impeller cannot rotate, the energy consumption of the turbine is increased, and the conventional nozzle and a baffle plate inside the steam turbine are in an integrally formed structure and are inconvenient to replace. Therefore, there is a need for a high pressure steam inlet nozzle for a steam turbine assembly that solves the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects in the prior art and providing a high-pressure steam inlet nozzle for a steam turbine unit.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a high-pressure steam inlet nozzle for a steam turbine set comprises a nozzle body, wherein one side of the nozzle body is provided with an impeller, blades are fixed on the impeller, one end of each blade is positioned under the nozzle body, the top of the nozzle body is connected with an elbow, one end of the elbow, which is far away from the nozzle body, is connected with a connecting pipe, one side of the connecting pipe is provided with a combustion chamber, one end, which is far away from the elbow, of the connecting pipe is fixed on the inner wall of the combustion chamber, the bottom of the outer wall of the connecting pipe is fixedly provided with a mounting plate, the bottom of the mounting plate is fixedly provided with a limiting plate, the limiting plate is of a semicircular structure, the side wall of the limiting plate is provided with a limiting groove, one end, which is far away from the limiting plate, of the mounting plate is fixedly provided with an electric push rod, baffle and mounting panel sliding connection, the bottom of mounting panel is fixed with first deflector, and the perpendicular cross-section of first deflector is L type structure, and the one end that the mounting panel was kept away from to first deflector is fixed in on the outer wall of limiting plate.

Preferably, the outer wall of the limiting plate is fixed with a guide block, the side wall of the movable plate, which is close to the limiting plate, is provided with a sliding groove, and the guide block is connected in the sliding groove in a sliding manner.

Preferably, the number of the electric push rods and the number of the movable plates are two, the two electric push rods are located on the same side of the limiting plate, and the two movable plates are fixedly connected with the baffle.

Preferably, the first guide plate is slidably connected with the movable plate.

Preferably, a second guide plate with a door-shaped vertical section is fixed at the bottom of the mounting plate and is in sliding connection with the movable plate.

Preferably, a pipe clamp is fixed on the outer wall of the connecting pipe, and the connecting pipe is welded with the pipe clamp.

The utility model has the advantages that:

1. the design of the limiting plate, the limiting groove, the electric push rod, the movable plate, the baffle and the mounting plate reduces the energy consumption of the steam turbine, so that the steam in the combustion chamber cannot blow to the blades when the pressure in the combustion chamber does not reach the set pressure, the resources are saved, and the energy utilization rate is improved;

2. the device is simple in structure and convenient to use, and the nozzle is convenient to replace after being damaged due to the independent design of the nozzle, so that the labor intensity of workers is reduced, and the use requirements of people are met.

3. The design of first deflector and second deflector avoids the combustion chamber internal pressure too big, leads to limiting plate and mounting panel separation to crash the emergence of impeller phenomenon, has prolonged the life of steam turbine.

Drawings

Fig. 1 is a schematic view of a connection relationship of a high-pressure steam inlet nozzle for a steam turbine set according to the present invention;

fig. 2 is a schematic view of the bottom of the nozzle body of the high-pressure steam inlet nozzle for a steam turbine set according to the present invention;

fig. 3 is a schematic view of a connection relationship between a movable plate and a guide block in a high-pressure steam inlet nozzle for a steam turbine set.

In the figure: the nozzle comprises a nozzle body 1, an elbow 2, a connecting pipe 3, blades 4, a limiting plate 5, a limiting groove 6, an electric push rod 7, a movable plate 8, a baffle 9, a mounting plate 10, a first guide plate 11, a guide block 12, a sliding groove 13, a second guide plate 14 and a pipe clamp 15.

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.

Referring to fig. 1-3, a high-pressure steam inlet nozzle for a steam turbine set comprises a nozzle body 1, an impeller is arranged on one side of the nozzle body 1, a blade 4 is fixed on the impeller, one end of the blade 4 is positioned under the nozzle body 1, an elbow 2 is connected with the top of the nozzle body 1, one end of the elbow 2 away from the nozzle body 1 is connected with a connecting pipe 3, one side of the connecting pipe 3 is provided with a combustion chamber, one end of the connecting pipe 3 away from the elbow 2 is fixed on the inner wall of the combustion chamber, a mounting plate 10 is fixed at the bottom of the outer wall of the connecting pipe 3, a limiting plate 5 is fixed at the bottom of the mounting plate 10, the limiting plate 5 is of a semicircular structure, a limiting groove 6 is arranged on the side wall of the limiting plate 5, an electric push rod 7 is fixed at one end of the mounting plate 10 away from the, the cross section of the bottom of the baffle 9 is of a circular structure, one end of the baffle 9, which is far away from the electric push rod 7, is slidably connected in the limiting groove 6, the baffle 9 is slidably connected with the mounting plate 10, the bottom of the mounting plate 10 is fixedly provided with a first guide plate 11, the vertical section of the first guide plate 11 is of an L-shaped structure, one end of the first guide plate 11, which is far away from the mounting plate 10, is fixed on the outer wall of the limiting plate 5, the outer wall of the limiting plate 5 is fixedly provided with a guide block 12, the side wall of the movable plate 8, which is close to the limiting plate 5, is provided with a sliding groove 13, the guide block 12 is slidably connected in the sliding groove 13, the number of the electric push rods 7 and the number of the movable plates 8 are two, the two electric push rods 7 are positioned on the same side of the limiting plate 5, the two movable plates 8 are, second deflector 14 and fly leaf 8 sliding connection, be fixed with pipe strap 15 on the outer wall of connecting pipe 3, connecting pipe 3 and pipe strap 15 welding, pipe strap 15 welds on the working face, connecting pipe 3 and pipe strap 15 welding, spacing groove 6 is semi-circular structure, the external diameter of limiting plate 5, the external diameter of baffle 9, the internal diameter of spacing groove 6 and the bottom cross section external diameter of nozzle body 1 reduce in proper order, the inside pressure sensor that is equipped with of combustion chamber, the outside of combustion chamber is equipped with the control switch who is used for controlling electric putter 7.

The working principle is as follows: when the steam turbine is not used, the one end of baffle 9 is located spacing groove 6, baffle 9 keeps off and goes out steam port department in the bottom of nozzle body 1, in using, take place the reaction in the combustion chamber, gas pressure increases gradually in the combustion chamber, after pressure reaches certain numerical value, electric putter 7's output shrink, fly leaf 8 drives baffle 9 and moves towards one side that is close to electric putter 7, until baffle 9 locates vertical cylindrical space and nozzle body 1 bottom and goes out the vertical cylindrical space non-intersect that steam port locates, electric putter 7 stop work, gas in the combustion chamber is spout by the play steam port of nozzle body 1 bottom behind connecting pipe 3 and return bend 2, spun gas blows to blade 4 department and makes the impeller rotate.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The high-pressure steam inlet nozzle for the steam turbine set comprises a nozzle body (1), wherein one side of the nozzle body (1) is provided with an impeller, the impeller is fixedly provided with blades (4), one end of each blade (4) is positioned under the nozzle body (1), the top of the nozzle body (1) is connected with an elbow (2), one end, away from the nozzle body (1), of each elbow (2) is connected with a connecting pipe (3), one side of each connecting pipe (3) is provided with a combustion chamber, one end, away from the elbows (2), of each connecting pipe (3) is fixed on the inner wall of the combustion chamber, the high-pressure steam inlet nozzle is characterized in that the bottom of the outer wall of each connecting pipe (3) is fixedly provided with a mounting plate (10), the bottom of each mounting plate (10) is fixedly provided with a limiting plate (5), each limiting plate (5) is of a semicircular structure, a limiting groove (6) is formed in the side wall of each limiting plate, the output of electric putter (7) is fixed with fly leaf (8), and the top of fly leaf (8) is fixed with baffle (9), and the bottom cross section of baffle (9) is circular structure, and the one end sliding connection who keeps away from electric putter (7) in spacing groove (6) baffle (9) and mounting panel (10) sliding connection, the bottom of mounting panel (10) is fixed with first deflector (11), and the perpendicular cross-section of first deflector (11) is L type structure, and the one end that mounting panel (10) were kept away from in first deflector (11) is fixed in on the outer wall of limiting plate (5).

2. The high-pressure steam inlet nozzle for the steam turbine unit as claimed in claim 1, wherein a guide block (12) is fixed on the outer wall of the limiting plate (5), a sliding groove (13) is formed in the side wall of the movable plate (8) close to the limiting plate (5), and the guide block (12) is slidably connected in the sliding groove (13).

3. The high-pressure steam inlet nozzle for the steam turbine unit as claimed in claim 1, wherein the number of the electric push rods (7) and the number of the movable plates (8) are both two, the two electric push rods (7) are located on the same side of the limiting plate (5), and the two movable plates (8) are both fixedly connected with the baffle (9).

4. A high-pressure steam inlet nozzle for a steam turbine according to claim 1, characterised in that the first guide plate (11) is in sliding connection with the movable plate (8).

5. A high-pressure steam inlet nozzle for a steam turbine according to claim 1, characterized in that a second guide plate (14) with a door-shaped vertical section is fixed at the bottom of the mounting plate (10), and the second guide plate (14) is slidably connected with the movable plate (8).

6. A high-pressure inlet nozzle for a steam turbine according to claim 1, characterised in that a pipe clamp (15) is fixed to the outer wall of the connecting pipe (3), and the connecting pipe (3) is welded to the pipe clamp (15).