CN205858426U

CN205858426U - A kind of U-tube bundle gland-sealing cooler

Info

Publication number: CN205858426U
Application number: CN201620763475.0U
Authority: CN
Inventors: 钟德樑
Original assignee: Hangzhou Guoneng Steam Turbine Engineering Co Ltd
Current assignee: Hangzhou Guoneng Steam Turbine Engineering Co Ltd
Priority date: 2016-07-19
Filing date: 2016-07-19
Publication date: 2017-01-04
Anticipated expiration: 2026-07-19

Abstract

This utility model relates to a kind of U-tube bundle gland-sealing cooler.The gland-sealing cooler that purpose is to provide should have cleaned and changed convenience, can monitor inside liquid level in real time and control the feature of steam and air mixture output.Technical scheme is: a kind of U-tube bundle gland-sealing cooler, including the shell being made up of barrel shell and end socket and setting heat exchange tube assemblies in the enclosure；Described heat exchange tube assemblies includes U-tube bundle that the tube sheet being fixed on shell, two ends be fixed on tube sheet and the baffle plate that U-tube bundle is positioned at barrel shell inner chamber and some deflection plates；It is characterized in that: described tube sheet is fixed between barrel shell and end socket by securing member；If described heat exchange tube assemblies also includes the dry slide being fixed on bottom deflection plate and being parallel to U-tube bundle length direction；The bottom of described every slideway protrudes from outer 1 2mm of deflection plate；Described U-tube bundle is horizontally inserted in barrel shell inner chamber by slideway.

Description

A kind of U-tube bundle gland-sealing cooler

Technical field

This utility model relates to a kind of steam turbine, the gland-sealing cooler of a kind of steam turbine.

Background technology

The Main Function of gland-sealing cooler is to extract the vapour gas mixture in turbine steam seal system out, prevents steam from scurrying into axle Cause emulsification of lubricant band water in bearing lubrication oil, gland leak-off can be reclaimed simultaneously, reduce the thermal loss of gland-packing leakage, carry High generatine set heat efficiency.

The operation principle of gland-sealing cooler is: use pipeline with seal steam after leaked-in air mixes at turbine shaft seal Causing gland-sealing cooler, the cooling through cooling medium makes the most of steam condensation in vapour gas mixture become Water Sproading profit With, part uncondensed vapor and on-condensible gas are directly discharged into air after cooling.For maintenance gland-sealing cooler tiny structure, smoothly Discharge on-condensible gas and strengthen gland-sealing cooler pressure heat transfer heat exchange efficiency, it is necessary to air ejector is set.Air ejector mainly includes Stream-jet ejector, water jet air ejector and blower fan drive suction machine.

, there is structure complexity, heat exchanger tube cleaning and change tired in the structure of the most double fixed tube sheet of conventional gland-sealing cooler Difficult, tube bundle heat stress is easily caused deformation, liquid level cannot the defect such as monitoring in real time.

Utility model content

The purpose of this utility model is to overcome the deficiency in above-mentioned background technology, it is provided that a kind of U-tube bundle gland-sealing cooler, This gland-sealing cooler should have cleaned and changed convenience, can monitor inside liquid level in real time and control steam and air mixture output Feature.

The technical solution of the utility model is:

A kind of U-tube bundle gland-sealing cooler, including the shell being made up of barrel shell and end socket and setting changing in the enclosure Heat pipe assembly；Described heat exchange tube assemblies includes U-tube bundle that the tube sheet being fixed on shell, two ends be fixed on tube sheet and will U-tube bundle is positioned at the baffle plate of barrel shell inner chamber and some deflection plates；It is characterized in that:

Described tube sheet is fixed between barrel shell and end socket by securing member；Described heat exchange tube assemblies also includes being fixed on baffling If bottom plate and be parallel to the dry slide of U-tube bundle length direction；The bottom of described every slideway protrudes from the outer of deflection plate 1-2mm；Described U-tube bundle is horizontally inserted in barrel shell inner chamber by slideway.

Described every all deflection plate of slideway level connection joint.

Described barrel shell is provided with magnetic flap level gauge and fluid level transmitter.

Described barrel shell is provided with gas leakage import, pump orifice, drain port；Described end socket is provided with cooling water inlet and cooling water Outlet.

The beneficial effects of the utility model are:

Of the present utility model simple and compact for structure, production cost is relatively low, and the cleaning of U-tube bundle is the most square with replacing Just, flexural deformation is produced after effectively prevent U-tube bundle life-time service because of thermal stress；This utility model can be supervised in real time simultaneously Control inside liquid level, and control steam and air mixture output.

Accompanying drawing explanation

Fig. 1 is perspective view of the present utility model.

Fig. 2 is main TV structure schematic diagram of the present utility model.

Fig. 3 is the main TV structure schematic diagram of heat exchange tube assemblies in this utility model.

Fig. 4 is the right TV structure schematic diagram of Fig. 3.

Fig. 5 be in Fig. 3 A-A to cross-sectional view.

Fig. 6 is the structure for amplifying schematic diagram in B portion in Fig. 5.

Detailed description of the invention

Below in conjunction with Figure of description, the utility model is described in further detail, but this utility model be not limited to Lower embodiment.

As it is shown in figure 1, a kind of U-tube bundle gland-sealing cooler, including shell and heat exchange tube assemblies.

Described shell is made up of with end socket 2 barrel shell 1.Described barrel shell is provided with gas leakage import 11, pump orifice 12, drain port 13, magnetic flap level gauge 15 and fluid level transmitter 16.Described barrel shell inner chamber is provided with erosion control baffle plate 19, and described erosion control baffle plate is positioned at Make below gas leakage import and for rustless steel.

It is provided with double saddle 17 bottom described barrel shell, and two centrifugal fans 18 connects pump orifice by pipeline simultaneously, One centrifugal fan is main frame, and another centrifugal fan is guest machine, and pipeline is additionally provided with double loop check-valves and expansion Joint (omits in figure).Described end socket is respectively equipped with cooling water inlet 21 and coolant outlet 22 up and down, and centre is separated by dividing plate, point Do not form separate upper inner chamber and lower inner cavity.

Magnetic flap level gauge and fluid level transmitter can show liquid level and Central Control Room remote real-time monitoring liquid level on the spot；Double Loop check-valves can effectively prevent outside air or the backflow of vapour gas mixture, thus needs when maintaining this utility model normally to work The tiny structure operating mode wanted；The displacement caused in the vibrations and thermal stress that absorb centrifugal fan used for expansion joint.

Described heat exchange tube assemblies is arranged in the enclosure, including U-tube bundle 3 and tube sheet 4；Described U-tube bundle horizontally extends into In barrel shell inner chamber, U-tube bundle is provided with baffle plate 31 and some deflection plates 32, and U-tube bundle is positioned at cylinder by baffle plate and deflection plate In shell inner chamber.

Described every piece of deflection plate is each perpendicular to the length direction of U-tube bundle and all deflection plates length along U-tube bundle Degree direction is sequentially arranged；The outer of described deflection plate and barrel shell inwall are formed and seal and deflection plate is provided with and is easy to air-flow and passes through Breach；These deflection plate baffle plates can change airflow direction thus improve the heat exchange efficiency of U-tube bundle；Described deflection plate is general For double segmental baffle；It is integrated also by some pull bars 33 concatenation between described deflection plate.

The two ends of described U-tube bundle are fixed on tube sheet (using intensity weldering to stick on expanded joint pipe plate)；Described tube sheet is fixed Between barrel shell and end socket, as in figure 2 it is shown, the both sides that barrel shell and end socket are by securing member clamping tube sheet.Owing to end socket inner chamber divides It is divided into upper and lower two parts, thus cooling medium can only enter U-tube bundle from the upper inner chamber limit of end socket, enters back into envelope after draw heat The lower inner cavity of head, is then drawn out of shell.

The bottom of described deflection plate is provided with two slideways being arranged in parallel 5.Described every slideway is long each parallel to U-tube bundle Degree direction and all deflection plates of level connection joint, the bottom of slideway protrudes from the outer 1-2mm of deflection plate.

Described U-tube bundle is positioned in barrel shell inner chamber by slideway horizontally slidablely, although U-tube bundle is radially obtaining Fetter but the flexible space that gains freedom in the longitudinal direction.

Operation principle of the present utility model is:

Turbine shaft seal gas leakage is sucked in barrel shell by gas leakage import, through deflection plate baffling be passed through cooling medium (as Cooling water) U-tube bundle forced heat-exchanging after, most steam condensation is become water and is recycled by drain port, a small amount of steam And on-condensible gas takes emptying away by centrifugal fan；When safeguarding, just U-tube bundle is taken out from barrel shell after removing end socket Go out, therefore can be carried out easily and change operation.

Claims

1. a U-tube bundle gland-sealing cooler, including the shell being made up of barrel shell (1) and end socket (2) and arrange in the enclosure Heat exchange tube assemblies；Described heat exchange tube assemblies includes the U-tube that the tube sheet (4) being fixed on shell, two ends are fixed on tube sheet Restraint (3) and U-tube bundle is positioned at baffle plate (31) and some deflection plates (32) of barrel shell inner chamber；It is characterized in that:

Described tube sheet is fixed between barrel shell and end socket by securing member；Described heat exchange tube assemblies also includes being fixed at the bottom of deflection plate If portion and be parallel to the dry slide (5) of U-tube bundle length direction；The bottom of described every slideway protrudes from the outer 1-of deflection plate 2mm；Described U-tube bundle is horizontally inserted in barrel shell inner chamber by slideway.

A kind of U-tube bundle gland-sealing cooler the most according to claim 1, it is characterised in that: described every slideway level is even Connect all deflection plates.

A kind of U-tube bundle gland-sealing cooler the most according to claim 2, it is characterised in that: described barrel shell is provided with magnetic and turns over Plate liquidometer (15) and fluid level transmitter (16).

A kind of U-tube bundle gland-sealing cooler the most according to claim 3, it is characterised in that: described barrel shell is provided with gas leakage Import (11), pump orifice (12), drain port (13)；Described end socket is provided with cooling water inlet (21) and coolant outlet (22).