CN215486187U

CN215486187U - Novel shaft seal heater

Info

Publication number: CN215486187U
Application number: CN202121088934.7U
Authority: CN
Inventors: 殷治华
Original assignee: Nanjing Chengyin Power Equipment Co ltd
Current assignee: Nanjing Chengyin Power Equipment Co ltd
Priority date: 2021-05-20
Filing date: 2021-05-20
Publication date: 2022-01-11
Anticipated expiration: 2031-05-20

Abstract

The utility model discloses a novel shaft seal heater, which comprises a shell and an air outlet, wherein the right side of the top end of the shell is provided with the air outlet, the left side of the air outlet is provided with a water inlet, the upper side of the water inlet is provided with a steam inlet, the left end of the steam inlet is fixedly connected with the shell, the middle part of the rear end of the shell is provided with a water outlet, when the novel shaft seal heater is required to be used, namely when steam flows back into a steam turbine along a steam inlet pipeline after the steam turbine stops working, a device for preventing steam backflow can block the steam in the pipeline and prevent the steam from flowing back into the interior of the steam turbine, so that when the steam turbine stops working suddenly due to faults, the steam backflow cannot influence the restart of the steam turbine, and the steam backflow can be effectively ensured to enter the steam turbine again when the steam turbine stops working, thereby ensuring that the next start of the steam turbine can be normally carried out.

Description

Novel shaft seal heater

Technical Field

The utility model belongs to the technical field related to shaft seal heaters, and particularly relates to a novel shaft seal heater.

Background

The shaft seal heater is a device for recovering shaft seal leakage steam and heating condensed water by using heat of the shaft seal leakage steam, so that energy loss is reduced, and heat efficiency of a unit is improved. When the steam turbine adopts an internal-discharge type shaft seal system, a shaft seal heater (a shaft seal cooler) is generally arranged for heating condensed water or desalted water and recovering shaft seal leakage steam, so that shaft seal leakage steam and heat loss are reduced, the environmental condition of a workshop is improved, air entering along with shaft seal leakage steam is guided to a diffusion pipe of a water-jet steam extractor through a common communicating pipe and is extracted by the negative pressure of the latter, and the micro-vacuum state of the shaft seal heater is ensured. Thus, the pressure of the chamber connected with the shaft seal heater and each shaft seal is reduced, and the shaft seal steam does not leak. The shaft seal air extractor or the exhaust fan is also used for producing negative pressure and discharging mixed air. The shaft seal air extractor is generally a steam-jet air extractor, a shaft seal heater matched with the shaft seal air extractor is divided into two stages, a steam leakage mixture enters into one stage, steam is condensed, air is sucked and mixed with working steam, the second stage is discharged after diffusion, the steam is condensed, and the air is discharged through an exhaust port.

The prior art of the shaft seal heater has the following problems: the existing machine shaft seal heater is mainly used for recovering shaft seal leakage steam and heating condensed water by utilizing heat of the shaft seal heater, the whole machine shaft seal heater is fixedly arranged by a supporting leg, the shaft seal leakage steam is recovered and the heat of the shaft seal leakage steam is utilized to heat the condensed water, the heat is mainly realized by the complicated reflux inside a tank body, but the steam is realized by a pipeline when the steam leads to the tank body, although the steam can be sent into the tank body through the pipeline for circulation, when the steam turbine stops working, the machine shaft seal heater cannot stop working, so that the steam can flow back to the steam turbine along the pipeline at the moment, a large amount of steam can be left in the steam turbine, the steam turbine is inconvenient to reuse, and the steam turbine can be directly restarted.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a novel shaft seal heater, which solves the problems that steam can be transmitted to the shaft seal heater through a pipeline, but the shaft seal heater cannot stop working when a steam turbine stops working, so that steam can flow back to the steam turbine along the pipeline at the moment, a large amount of water vapor can be left in the steam turbine, the steam turbine is inconveniently affected to reuse, and even the steam turbine can be directly restarted.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a novel shaft seal heater, includes shell and gas outlet, the gas outlet is installed on the top right side of shell, the left side of gas outlet is provided with the water inlet, the upside of water inlet is provided with the steam inlet port, the left end and the shell fixed connection of steam inlet port, the rear end middle part of shell is provided with the delivery port, the bottom of shell is close to the left and right sides and is provided with two supporting legs, two be provided with hydrophobic entry and hydrophobic export between the supporting leg, hydrophobic export is in the left side of hydrophobic entry, the left side pipe inner wall of steam inlet port is provided with fixed plate washer, fixed plate washer center runs through there is the I-shaped plate washer, the spring has been cup jointed on the right side of I-shaped plate washer.

Preferably, the supporting leg is made of stainless steel, yellow metal paint is coated on the surface of the supporting leg, and the supporting leg is fixedly connected with the shell through welding.

Preferably, the surface of the outer shell is painted with yellow metal paint, and the outer shell consists of five parts and is fixedly connected with the five parts by bolts.

Preferably, the calibers of the water inlet and the water outlet are ten centimeters, and the water inlet and the water outlet are perpendicular to the shell.

Preferably, the calibers of the hydrophobic inlet and the hydrophobic outlet are five centimeters, and the hydrophobic inlet and the hydrophobic outlet are vertically arranged.

Preferably, the backflow prevention device consisting of the spring, the I-shaped backflow baffle and the fixed baffle can effectively block backflow steam in the pipeline, and the entering steam can pass through the backflow prevention device without influence.

Compared with the prior art, the utility model provides a novel shaft seal heater, which has the following beneficial effects:

the present invention adds a device for preventing steam backflow in the pipe of the steam inlet of the shaft seal heater, the newly added device for preventing the steam backflow is fixedly arranged inside the steam inlet pipeline under the condition of not using, so that the carrying and the use of the whole shaft seal heater are not influenced, when the device is used, namely when the steam turbine stops working and the steam flows back into the steam turbine along the steam inlet pipeline, the device for preventing the steam from flowing back can block the steam in the pipeline and prevent the steam from flowing back into the steam turbine, therefore, when the turbine stops working suddenly due to faults, the steam can not be influenced by the reflux of the steam to restart the turbine, therefore, the steam backflow can be effectively guaranteed to reenter the steam turbine when the steam turbine stops working, and the next starting of the steam turbine can be normally carried out.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model without limiting the utility model in which:

fig. 1 is a schematic front view of a novel shaft seal heater according to the present invention;

FIG. 2 is a schematic side view of a novel shaft seal heater according to the present invention;

FIG. 3 is a schematic view of a backflow prevention structure of a shaft seal heater according to the present invention;

in the figure: 1. supporting legs; 2. a housing; 3. a water inlet; 4. a water outlet; 5. a steam inlet port; 6. an air outlet; 7. a hydrophobic inlet; 8. a hydrophobic outlet; 9. a spring; 10. an I-shaped return baffle; 11. a baffle is fixed.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a novel shaft seal heater comprises a shell 2 and a gas outlet 6, wherein yellow metal paint is coated on the surface of the shell 2, the design is more attractive and rust-proof, the shell 2 consists of five parts, the middle part of the shell is fixedly connected with the shell 2 by bolts, the design is convenient to disassemble and maintain, the gas outlet 6 is installed on the right side of the top end of the shell 2, a water inlet 3 is arranged on the left side of the gas outlet 6, a steam inlet 5 is arranged on the upper side of the water inlet 3, the left end of the steam inlet 5 is fixedly connected with the shell 2, a water outlet 4 is arranged in the middle of the rear end of the shell 2, the calibers of the water inlet 3 and the water outlet 4 are ten centimeters, the water inlet 3 and the water outlet 4 are both vertical to the shell 2, the design is more convenient to connect a pipeline, two supporting legs 1 are arranged at the bottom end of the shell 2 close to the left side and the right side, the supporting legs 1 are made of stainless steel, and the yellow metal paint is coated on the surface, the design increases the durability of use, the support legs 1 are fixedly connected with the shell 2 by welding, the design increases the stability of use, a hydrophobic inlet 7 and a hydrophobic outlet 8 are arranged between the two support legs 1, the hydrophobic outlet 8 is arranged at the left side of the hydrophobic inlet 7, the calibers of the hydrophobic inlet 7 and the hydrophobic outlet 8 are five centimeters, the hydrophobic inlet 7 and the hydrophobic outlet 8 are both vertically arranged, the design can not influence water outlet or water inlet and is convenient for connecting the pipeline, the inner wall of the pipeline on the left side of the steam inlet 5 is provided with the fixed baffle plate 11, the center of the fixed baffle plate 11 penetrates through the I-shaped return baffle plate 10, the right side of the I-shaped return baffle plate 10 is sleeved with the spring 9, the device which is formed by the spring 9, the I-shaped return baffle plate 10 and the fixed baffle plate 11 and used for preventing backflow can effectively block backflow steam in the pipeline and the entering steam can pass through without influence, so that the design is convenient and cheap, and the effect is good.

The working principle and the using process of the utility model are as follows: after the utility model is installed, when the shaft seal heater is used, firstly, the whole shaft seal heater is fixedly installed on the ground through the supporting leg 1, after the whole shaft seal heater is fixedly installed through the supporting leg 1, then the water inlet 3 is connected into the water inlet pipe through the bolt, then the water outlet 4 is fixedly connected to the water outlet pipeline through the bolt, then the steam inlet 5 is fixedly connected to the rear end of the steam turbine through the bolt, then the air outlet 6 is fixedly connected to the air outlet pipeline through the bolt, then the drain inlet 7 is connected into the drain pipeline, after the pipelines are connected, the steam turbine is opened, after the steam turbine works, the steam can flow into the shaft seal heater along the pipeline of the steam inlet 5, at the moment, the device for preventing the backflow of the steam can not influence the normal entering of the steam into the shaft seal heater, once the steam turbine stops working, the spring 9 can rebound the I-shaped return baffle 10 to the original position and plug the hole to prevent the water vapor from flowing back, thus effectively protecting the performance of the steam turbine when the steam turbine is started next time.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a novel shaft seal heater, includes shell (2) and gas outlet (6), its characterized in that: an air outlet (6) is arranged at the right side of the top end of the shell (2), a water inlet (3) is arranged at the left side of the air outlet (6), a steam inlet (5) is arranged on the upper side of the water inlet (3), the left end of the steam inlet (5) is fixedly connected with the shell (2), a water outlet (4) is arranged in the middle of the rear end of the shell (2), two supporting legs (1) are arranged at the bottom end of the shell (2) close to the left side and the right side, a hydrophobic inlet (7) and a hydrophobic outlet (8) are arranged between the two supporting legs (1), the hydrophobic outlet (8) is arranged at the left side of the hydrophobic inlet (7), the inner wall of the left pipeline of the steam inlet (5) is provided with a fixed baffle plate (11), an I-shaped return baffle (10) penetrates through the center of the fixed baffle (11), and a spring (9) is sleeved on the right side of the I-shaped return baffle (10).

2. The novel shaft seal heater of claim 1, wherein: the supporting leg (1) is made of stainless steel, yellow metal paint is coated on the surface of the supporting leg, and the supporting leg (1) is fixedly connected with the shell (2) through welding.

3. The novel shaft seal heater of claim 1, wherein: the surface of the shell (2) is coated with yellow metal paint, and the shell (2) consists of five parts and is fixedly connected with the middle part of the shell through bolts.

4. The novel shaft seal heater of claim 1, wherein: the calibers of the water inlet (3) and the water outlet (4) are ten centimeters, and the water inlet (3) and the water outlet (4) are both vertical to the shell (2).

5. The novel shaft seal heater of claim 1, wherein: the calibers of the hydrophobic inlet (7) and the hydrophobic outlet (8) are five centimeters, and the hydrophobic inlet (7) and the hydrophobic outlet (8) are vertically arranged.

6. The novel shaft seal heater of claim 1, wherein: the backflow prevention device composed of the spring (9), the I-shaped backflow baffle plate (10) and the fixed baffle plate (11) can effectively prevent backflow steam from blocking in the pipeline and enable the entering steam to pass through without influence.