CN211777620U

CN211777620U - Exhaust pipeline drainage system for high-pressure cylinder of steam turbine

Info

Publication number: CN211777620U
Application number: CN202020352500.2U
Authority: CN
Inventors: 阙敏; 肖继妙; 陈应云
Original assignee: Zhanjiang Zhongyue Energy Co ltd
Current assignee: Zhanjiang Zhongyue Energy Co ltd
Priority date: 2020-03-19
Filing date: 2020-03-19
Publication date: 2020-10-27
Anticipated expiration: 2030-03-19

Abstract

The utility model discloses an exhaust pipeline drainage system for a high-pressure cylinder of a steam turbine, which comprises a drainage bag cylinder, wherein one side of the drainage bag cylinder is fixedly connected with an automatic steam trap through a bolt; the utility model discloses an automatic steam trap can keep hydrophobic bag ponding not under the normal condition, avoid the pneumatic steam trap of pneumatic steam trap frequent switch and damage, it is great and automatic steam trap untimely to come the water yield when the system is unusual, the steam trap water level rises, the protection linkage is hydrophobic pneumatic steam trap opens rapid drainage, and send alarm signal, the inspection of suggestion runner, keep apart the water source, it is one set that the fine and close far-away double-colored water level of newly-increased hydrophobic bag configuration magnetism is simultaneously fine, accurate measurement hydrophobic bag water level, reduce because of the inaccurate and frequent switch of hydrophobic pneumatic door of water level, reduce the steam heat loss, extension pneumatic door solenoid valve life, and drain pipe increases the automatic steam trap of bypass around the high-pressure discharge check valve, little ponding is dredged from automatic steam trap, a large amount of ponding is dredged from hydrophobic pneumatic door rapidly.

Description

Exhaust pipeline drainage system for high-pressure cylinder of steam turbine

Technical Field

The utility model relates to an exhaust duct drainage system technical field specifically is an exhaust duct drainage system for steam turbine high pressure cylinder.

Background

The high-pressure cylinder exhaust is one of the parts which are easy to cause water inflow of the high-pressure cylinder of the steam turbine, and once the water inflow occurs, the damage to a unit is great. According to statistics, at present, various types and capacities of domestic intermediate reheating units have accidents of overlarge shaft bending, blade fracture or through-flow abrasion and the like to different degrees due to water inlet and cold steam inlet of a high-pressure cylinder exhaust pipe. The water source may come from three sources. Namely, I-grade bypass desuperheating water, reheater desuperheating water and steam extraction pipeline to No. 2 high-pressure heater.

Therefore, the problem of water inflow of the high-pressure cylinder of the steam turbine in the prior art is urgently solved, and a new technology is urgently needed to solve the problem.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a steam turbine is blast pipe drainage system for high pressure cylinder to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a steam turbine is blast pipe drainage system for high pressure cylinder, includes the drain bag barrel, drain bag barrel one side is through the automatic steam trap of bolt fixedly connected with, automatic steam trap with it has steam side to take over and water side to take over to peg graft through bolt fastening between the drain bag barrel looks proximal surface, the pneumatic trap of bolt fixedly connected with is passed through to drain bag barrel bottom, there is drain bag steam side balance pipe on drain bag barrel top through bolt fixedly connected with.

Preferably, the drain bag barrel further comprises a water level gauge, the inside of the drain bag barrel is fixedly connected with the water level gauge through a screw, one side of the water level gauge is fixedly connected with a magnetic water level transmitter through a screw, and the magnetic water level transmitter is in electrical signal connection with a DCS.

Preferably, the hydrophobic bag cylinder is a combined hydrophobic mode.

Preferably, the drainage bag cylinder and the automatic steam trap are used as a double water-proof protection device for a high-pressure cylinder of a steam turbine.

Preferably, the middle parts of the steam side connecting pipe and the water side connecting pipe are fixedly connected with a drain valve through a flange and a bolt.

Preferably, the interface elevation of the steam side balance pipe of the drain bag is not lower than the highest elevation in the drain point, the gradient of the steam side balance pipe of the drain bag is greater than one percent, one end of the steam side balance pipe of the drain bag points to the steam bag cylinder, and steam is in the steam side balance pipe of the drain bag.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses an automatic steam trap can keep hydrophobic bag ponding not under the normal condition, avoid the pneumatic steam trap of pneumatic steam trap frequent switch and damage, it is great and automatic steam trap untimely to come the water yield when the system is unusual, the steam trap water level rises, the protection linkage is hydrophobic pneumatic steam trap opens rapid drainage, and send alarm signal, the inspection of suggestion runner, keep apart the water source, it is one set that the fine and close far-away double-colored water level of newly-increased hydrophobic bag configuration magnetism is simultaneously fine, accurate measurement hydrophobic bag water level, reduce because of the inaccurate and frequent switch of hydrophobic pneumatic door of water level, reduce the steam heat loss, extension pneumatic door solenoid valve life, and drain pipe increases the automatic steam trap of bypass around the high-pressure discharge check valve, little ponding is dredged from automatic steam trap, a large amount of ponding is dredged from hydrophobic pneumatic door rapidly.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic view of the installation position structure of the present invention.

In the figure: 1-hydrophobic bag cylinder.

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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: an exhaust pipeline drainage system for a high-pressure cylinder of a steam turbine comprises a drainage bag barrel body 1, wherein one side of the drainage bag barrel body 1 is fixedly connected with an automatic steam trap through a bolt, a steam side connecting pipe and a water side connecting pipe are fixedly inserted between adjacent surfaces of the automatic steam trap and the drainage bag barrel body 1 through bolts, the bottom end of the drainage bag barrel body 1 is fixedly connected with a pneumatic drainage valve through a bolt, the top end of the drainage bag barrel body 1 is fixedly connected with a drainage bag steam side balancing pipe through a bolt, the interior of the drainage bag barrel body 1 is fixedly connected with a water level meter through a screw, one side of the water level meter is fixedly connected with a magnetic water level transducer through a screw, the magnetic water level transducer is electrically connected with a DCS system, the drainage bag barrel body 1 adopts a combined drainage mode, and the drainage bag barrel body 1 and the automatic steam trap are used as a dual water-inlet-proof protection, the steam side connecting pipe and the water side connecting pipe are fixedly connected with a drain valve through flanges and bolts, the interface elevation of the steam side balance pipe of the drain bag is not lower than the highest elevation in a drain point, the gradient of the steam side balance pipe of the drain bag is more than one percent, one end of the steam side balance pipe of the drain bag points to the drain bag barrel 1, steam is filled in the steam side balance pipe of the drain bag, a drain bag is arranged at a high level, each path of drain after the high-level drain check valve is received is drained, in order to avoid the steam condensing in the drain bag and the water level rising in the normal operation, the pneumatic drain valve is opened frequently, a bypass is additionally arranged in front of and behind the pneumatic drain valve, an automatic drain device is installed, the drain bag can be kept not to have water in the normal operation, the main path of drain can be assisted in the drainage process, the steam side balance pipe of the drain bag is enabled to be drained, the interface elevation is higher than the highest elevation of all the drain points according to the arrangement, the gradient of the steam balancing pipe is more than 1 percent, the steam balancing pipe points to the drain bag to ensure that steam is always in a pipe section with balanced steam receiving under any working condition, in order to slow down the water inlet speed and the stable rising of the water level of the cylinder, avoid the frequent opening of a pneumatic drain door, ensure that before the pneumatic drain door is completely opened, drain water can not fill a high-pressure cylinder steam exhaust pipe and enter a cylinder, comprehensively consider the factors of the time for the full-opening stroke of the pneumatic drain door, the discharge capacity, the allowable volume of a high-pressure cylinder steam exhaust pipeline and the like, select a proper pipe diameter of a water inlet pipe at the bottom of the designed drain bag, simultaneously, in order to further ensure the requirements, install a magnetic water level transmitter along the height of a water level gauge, ensure that the minimum interval distance of the transmitter is 6mm, and connect the transmitter into a DCS system, respectively design a low water level alarm and a high water level alarm and link the opening of the pneumatic drain door for the drain bag, and install the drain bag on the drain pipeline, connecting a tee joint, connecting a drain bag at one end of the tee joint, connecting a newly-added drain bag with an action water level elevation which is 10cm lower than that of the original drain bag, only sending high water level signals of 2 drain bags, linking a drain pneumatic door to drain, connecting the newly-added drain bag with a phi 25 multiplied by 2 pipeline at the top of the drain bag, connecting the newly-added drain bag with a reheating cold section to the vicinity of a small machine high-pressure steam source pipeline, using the newly-added drain bag as a steam side balance pipe of the drain bag, adding a manual door model J61H-64DN50 between the newly-added drain bag and the pneumatic drain valve, adding a bypass pipe to the pneumatic drain door, adding a drain device model CS61H-100DN50 on the bypass, and adding manual doors model J61H-64DN50 in front and back of the drain device.

The working principle is as follows: the automatic drainage device can keep the drainage bag not to accumulate water under the normal condition, avoid frequent switch of pneumatic drainage valve to damage the pneumatic drainage valve, when the unusual inflow of system is great and the automatic drainage device untimely, the drainage bag water level rises, protect linkage drainage pneumatic drainage valve to open rapid drainage, and send alarm signal, the suggestion runner inspection, keep apart the water source, newly-increased drainage bag configuration magnetism fine and close far double-colored water level is one set simultaneously, accurate measurement drainage bag water level, reduce because of the inaccurate frequent switch of drainage pneumatic door of water level, reduce the steam heat loss, prolong pneumatic door solenoid valve life-span, and drain pipe increase bypass automatic drainage device around the high drainage back check valve, little ponding is dredged from the automatic drainage device, a large amount of ponding is dredged from the pneumatic door of drainage rapidly.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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 invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a steam turbine is exhaust pipeline drainage system for high pressure cylinder which characterized in that includes:

a drainage bag cylinder (1);

the steam side connection pipe and the water side connection pipe are fixedly inserted between adjacent surfaces of the drainage bag cylinder (1) through bolts, the bottom end of the drainage bag cylinder (1) is fixedly connected with a pneumatic drainage valve through bolts, and the top end of the drainage bag cylinder (1) is fixedly connected with a drainage bag steam side balance pipe through bolts.

2. The exhaust pipeline drainage system for the high-pressure cylinder of the steam turbine according to claim 1, wherein: the hydrophobic bag cylinder (1) further comprises:

a water level gauge;

the inside of the drain bag barrel (1) is fixedly connected with a water level meter through screws, one side of the water level meter is fixedly connected with a magnetic water level transmitter through screws, and the magnetic water level transmitter is in electrical signal connection with a DCS (distributed control system).

3. The exhaust pipeline drainage system for the high-pressure cylinder of the steam turbine according to claim 2, wherein: the hydrophobic bag cylinder body (1) is particularly in a combined hydrophobic mode.

4. The exhaust pipeline drainage system for the high-pressure cylinder of the steam turbine according to claim 1, wherein: the drain bag cylinder body (1) and the automatic steam trap are used as a double water-inlet-proof protection device for a high-pressure cylinder of a steam turbine.

5. The exhaust pipeline drainage system for the high-pressure cylinder of the steam turbine according to claim 1, wherein: the middle parts of the steam side connecting pipe and the water side connecting pipe are fixedly connected with a drain valve through a flange and a bolt.

6. The exhaust pipeline drainage system for the high-pressure cylinder of the steam turbine according to claim 1, wherein: the interface elevation of the steam side balance pipe of the drain bag is not lower than the highest elevation in the drain point, the gradient of the steam side balance pipe of the drain bag is greater than one percent, one end of the steam side balance pipe of the drain bag points to the steam bag cylinder (1), and steam is in the steam side balance pipe of the drain bag.