CN2532354Y

CN2532354Y - Automatic trap system

Info

Publication number: CN2532354Y
Application number: CN 02215598
Authority: CN
Inventors: 施大钟
Original assignee: GUANGHUI INSTRUMENT CO SHANGHAI
Current assignee: GUANGHUI INSTRUMENT CO SHANGHAI
Priority date: 2002-02-05
Filing date: 2002-02-05
Publication date: 2003-01-22
Anticipated expiration: 2012-02-05

Abstract

The utility model relates to a drain valve system, in particular to an energy saving automatic drain valve system that is matched with a steam turbine and a boiler draining system in the power station field. The system is composed of an automatic drain valve, an electromagnetic valve (18), a check valve (17) and a program control unit PC (19), and is characterized in that the check valve (17), the electromagnetic valve (18) and a duplex cylinder (10) are connected through a pipeline; a liquid level sensor (3), the program control unit PC (19) and the electromagnetic valve (18) are connected through an electrical part; the automatic drain valve is composed of a water bag (1), a valve body (5), an upper cover (13), a bracket (9), a manual mechanism (12) and the duplex cylinder (10). The system solves the problems that the manual drain valve system has the disadvantages of bad closing performance, strong labor strength, large energy consumption and unsatisfying the requirement of the program control management, and the system is characterized in no leakage, recycling use of condensed water and uneasy change of the starting point of a valve core.

Description

Automatic drain valve system

Technical field:

The utility model relates to a kind of drain valve, and F16K21/00 goes in particularly a kind of supporting energy-saving automatic drain valve system of field, power station steam turbine, boiler draining system that is applied to.

Background technique:

The drain valve of domestic production at present mainly is made up of valve body, valve seat, spool, valve rod and handwheel, by rotatablely moving of handwheel, drives spool and moves, and reaches the control to medium, and therefore this valve is called manual drain valve.Manually the remarkable defective of drain valve be close poor performance, the processing accident is slow, labor intensity is big, energy consumption is big, and along with the operation of unit high parameter, can't satisfy the requirement of program control management.

Summary of the invention:

The purpose of this utility model is that a kind of energy-saving automatic drain valve system that is applicable to that field, power station steam turbine, boiler draining system are supporting will be provided, and can be according to testing signal automatic opening-closing valve, and have energy-conserving action, to solve the deficiency of existing manual drain valve.This novel automatic drain valve system can adopt following technological scheme to implement: this system is made up of automatic drain valve, solenoid valve, one-way valve and program-controlled unit.Wherein drain valve is made up of water bag, valve body, loam cake, support, man-operated mechanism and two cylinder automatically.Water bag is the wire chamber of a sealing, steam line and liquid level sensor are equipped with in inside, and steam line is provided with several overflows, steam line is connected with the entry end of valve body through the transition link, valve inner is equipped with valve seat, spool, valve seat and spool adopt the stainless steel surfaces pile-up welding hard alloy or directly process with cemented carbide, to guarantee high temperature resistant and high pressure.The outlet end of valve body links to each other with device recycle-water pipeline, plays water saving, energy-conserving action.Loam cake is installed on the valve body, and there is the refractory seal filler loam cake inside, guarantees that valve does not have leakage.Mounting bracket on the loam cake supporting surface is installed the two cylinders that have handwheel on the support, push rod and spool in two cylinders fuse by coupling.In two cylinder chambers of push rod right-hand member spring is housed, one-way valve is to be connected by pipeline with solenoid valve with two cylinders, and liquid level sensor, program-controlled unit PC and solenoid valve are to connect by electrical part.The automatic drain valve system that makes according to technique scheme compares with existing manual drain valve system and has following advantage: 1, native system employing two cylinder arrangement, comparing one with manual drain valve system is the sealing force that has increased valve seat, the 2nd, make automatic control into manually controlling, solved the problem of manual drain valve system closing poor performance; 2, manually in the drain valve starting point of spool wayward, now make two cylinders into automatically after the control, thoroughly solved the starting point that causes owing to manual operation is improper and changed problem; 3, the refractory seal filler is housed in the loam cake, guarantees that valve does not have leakage, and link to each other with the device return water pipe, make condensed water to recycle, so have water saving, energy-conserving action at the outlet end of valve body; 4, former manually-operable has alleviated labor intensity after now adopting program control operation; 5, native system chance robot control system(RCS) or air failure can be switched by handwheel.

Description of drawings:

Accompanying drawing 1, automatic drain valve system principle schematic representation.

Accompanying drawing 2, automatic drain valve structural representation.

Embodiment:

Automatic drain valve of the present utility model system is as shown in Figure 1 and Figure 2: it is by automatic drain valve, solenoid valve [18], one-way valve [17] and program-controlled unit PC[19] form.Wherein drain valve is made up of water bag [1], valve body [5], loam cake [13], support [9], man-operated mechanism [12] and two cylinder [10] as shown in Figure 2 automatically.Steam line [2] and liquid level sensor [3] are equipped with in water bag [1] inside, and steam line is provided with several overflows, steam line is connected through the entry end of transition link [4] with valve body [5], valve inner is equipped with valve seat [6], spool [7], loam cake [13] is installed on the valve body, there is refractory seal filler [8] loam cake inside, mounting bracket on the loam cake supporting surface [9], and on bracket, be provided with towards the push rod chamber [16] of two cylinders, the two cylinders [10] that have handwheel [12] are installed on the support, and the push rod [15] in two cylinders fuses by coupling [14] with spool [7].And one-way valve [17] and solenoid valve [18] are to be connected by pipeline with two cylinders [10], and liquid level sensor [3], program-controlled unit PC[19] and solenoid valve [18] be to connect by electrical part.During the automatic drain valve system works of making according to above-mentioned mode of execution by water vapor when pipeline [2] enters valve body [5], because temperature reduces, water vapor is transformed into water, when the ponding position reaches water bag [1] lower end liquid level sensor [3], send signal and make solenoid valve [18] action, pressurized air enters two cylinders [10] through solenoid valve by push rod chamber [16], push rod [15] motion drives spool [7] motion, valve open carry out hydrophobic automatically.Send signal when water level is lower than the sensor [3] of water bag lower end solenoid valve is resetted, the pressurized air in two cylinders is discharged by solenoid valve under the effect of spring [11], and valve cuts out.As air failure, with the pressurized air locking in two cylinders, valve position remains unchanged one-way valve [17] through solenoid valve [18].During as programmed control system or air failure, the drain valve system also can operate by handwheel [12] automatically, and valve is opened and closed.

Claims

1, one profit is by automatic drain valve, solenoid valve [18], one-way valve [17] and program-controlled unit PC[19] the automatic drain valve system that forms, it is characterized in that automatic drain valve is by water bag [1], valve body [5], loam cake [13], support [9], man-operated mechanism [12] and two cylinder [10] are formed, wherein steam line [2] and liquid level sensor [3] are equipped with in water bag [1] inside, steam line is provided with several overflows, steam line is connected through the entry end of transition link [4] with valve body [5], valve inner is equipped with valve seat [6], spool [7], loam cake [13] is installed on the valve body, there is refractory seal filler [8] loam cake inside, mounting bracket on the loam cake supporting surface [9], and on bracket, be provided with towards the push rod chamber [16] of two cylinders, the two cylinders [10] that have handwheel [12] are installed on the support, push rod [15] in two cylinders fuses by coupling [14] with spool [7], and spring [11] is housed in two cylinder chambers of push rod right-hand member.

2, automatic drain valve according to claim 1 system is characterized in that one-way valve [17] is to be connected by pipeline with solenoid valve [18] with two cylinders [10], and liquid level sensor [3], program-controlled unit PC[19] and solenoid valve [18] be to connect by electrical part.