CN200943846Y

CN200943846Y - Automatic water-feeding device for steam boiler

Info

Publication number: CN200943846Y
Application number: CN 200620127493
Authority: CN
Inventors: 侯占雪
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-08-29
Filing date: 2006-08-29
Publication date: 2007-09-05
Anticipated expiration: 2016-08-29

Abstract

The utility model discloses an automatic water feeding device for a steam boiler. The structure of the utility model is that a water inlet pipe is connected at the bottom of a water feeding tank; an air outlet opening which can be sealed with a cover is arranged on the water feeding tank; a non-return valve is connected at the lower section of the water inlet pipe; the middle section of the water inlet pipe connects a water feeding pipe leading to the boiler, a control valve is arranged on the water feeding pipe. The water feeding pipe can be connected on the upper section of the side wall of the boiler to make the water feeding tank higher than the boiler. A water source is connected on the lower section of the water inlet pipe. When the water level in the steam boiler is lower, the water feeding device can automatically feed water to attain the aims of water level maintaining in the boiler and boiler dry burning prevention. The water feeding device is not required more expensive and vulnerable equipment as make-up water pump, to make the water feeding device have the advantages of low cost, simple structure, and convenient maintenance. Before the water in the water feeding tank is fed in the boiler, the water is preheated by the steam; thereby the boiler avoids the defects such as discontinuous operation and instable steam pressure caused by feeding the cold water, to make the boiler operated steadier.

Description

A kind of steam boiler automatic water-replenishing device

Technical field

The utility model relates to the boiler corollary apparatus, specifically a kind of steam boiler automatic water-replenishing device.

Background technology

The automatic water-replenishing device of existing steam boiler normally is made up of electric control gear and small pump, when the water yield of the boiler hot-water circulatory system reduces, sends signal by electric control gear, starts small pump to boiler replenishing water.When the water yield was mended setting value, electric control gear sent signal, closes small pump, stops moisturizing.The weak point of this water replanishing device is the electric control gear complex structure, and the price of small pump is more expensive, has improved the operation and maintenance cost of boiler.In addition, this device can reduce furnace temperature owing to be directly to add cold water by water pump after therefore adding, and the water of adding need could normally produce steam after heating after a while.So both influence the continuity of boiler work, reduced the operating efficiency of boiler; The steam pressure shakiness that boiler is produced has influenced with normally carrying out that hot department produces and works.Especially in the winter time, water pump and filling pipe also very easily freeze, and bring certain difficulty to boiler fills, have influenced the normal heat supply of boiler.

The utility model content

The purpose of this utility model just provides a kind of steam boiler automatic water-replenishing device simple in structure, easy to use, to guarantee the stable heating of boiler.

The utility model is achieved in that this automatic water-replenishing device is to connect water inlet pipe in the bottom of replenisher tank, but replenisher tank is provided with the exhaust outlet of capping, the hypomere of water inlet pipe is connected to check valve, and the middle part of water inlet pipe connects the filling pipe that leads to boiler, and control valve is housed on filling pipe.Filling pipe can be connected the top of boiler side walls, makes replenisher tank be higher than boiler.The lower end of water inlet pipe connects the water source.

This device is opened the exhaust outlet on the replenisher tank earlier when using first, close the control valve on the filling pipe, utilizes running water system by water inlet pipe water filling in replenisher tank then, and the check valve on the water inlet pipe can stop the water of mending to reflux.After treating that water is filled with,, open the control valve on the filling pipe then, replenisher tank is communicated with boiler, can realize automatic water supplement along with the minimizing of the work of boiler, the water yield with the exhaust outlet on replenisher tank sealing.Its course of work is:

When the water level in the boiler was higher than the filling pipe mouth of pipe, owing to have high steam in the boiler, the water in the replenisher tank can not flow in the boiler.When in case the water level in the boiler is brought down below the height of the filling pipe mouth of pipe, high-pressure water vapor in the boiler just can heat the water storage in filling pipe and the replenisher tank, at this moment the water temperature in the replenisher tank just raises gradually, the water generates steam that heats up, progressively reduce with the interior pressure differential of boiler thereby make in the replenisher tank, and finally reach poised state.At this moment, the water that is in the high-order replenisher tank begins to flow in the boiler that is in low level.In this process, the water level in the boiler raises gradually, and the space that the replenisher tank top, back that sluices forms is filled by water vapour.When the water level in the boiler was higher than the filling pipe mouth of pipe, the steam in the boiler no longer directly produced heat effect to filling pipe and replenisher tank.The replenisher tank internal pressure reduces gradually, when this pressure during less than the boiler internal pressure, stops water filling in boiler.So constantly move in circles, can make the water level in the boiler be not less than the lowest water level line that sets by the filling pipe mouth of pipe.In use for some time, during water shortage in the replenisher tank, can close the control valve on the filling pipe, cut off being communicated with of replenisher tank and boiler.At this moment, the water in the replenisher tank is lowered the temperature gradually because of the heat supply that lacks boiler, and the water vapour cooling at replenisher tank top also is condensed into liquid state, thereby in replenisher tank, form negative pressure, under the effect of negative pressure, the water at water source is inhaled in the replenisher tank from water inlet pipe, until the inside and outside pressure balance of replenisher tank.Like this, open control valve again, the utility model just can moisturizing in the trend boiler.

Adopt such structure, when the water level in the steam boiler was lower than filling pipe, the water in the replenisher tank can flow in the boiler automatically, thereby played the effect of automatic water supplement in boiler, reached the purpose of keeping water level in the boiler, preventing the boiler dry combustion method.The utility model need not more valuable, flimsy equipment such as small pump, makes it have advantage cheap, simple in structure, easy to maintenance.Water in the utility model in the replenisher tank had been carried out preheating by steam before mending boiler, thereby made boiler avoid because of adding the weak points such as steam pressure instability that the work that cold water causes is discontinuous, produce boiler being moved more stably.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

The specific embodiment

As shown in Figure 1, the utility model is to connect water inlet pipe 4 in the bottom of replenisher tank 2, but replenisher tank 2 is provided with the exhaust outlet 1 of capping, connects the filling pipe 10 that leads to boiler on the water inlet pipe, control valve 9 is housed on filling pipe 10, with the water inlet pipe 4 of filling pipe joint bottom on be connected to check valve 5.

Replenisher tank 2 can be made different shape, still, because this replenisher tank is a pressure vessel, so its edge is preferably circular-arc, to improve its compressive resistance.A kind of shape preferably is that the end is hemispheric cylinder.The water receiving source, lower end of water inlet pipe 4, water inlet pipe 4 can adopt the lower end of water inlet pipe to stretch into cistern 6 with the mode of communicating at water source or be communicated with running water pipe etc.The position of filling pipe 10 mouths of pipe should be not less than the lowest water level line of boiler, is on the safety level to guarantee the water level in the boiler.Control valve 9 set on filling pipe 10 can be selected the ball valve of manual control or electronic control for use.For hand control valve, the control lever 7 of downward extension preferably is set and connects joystick, in order to the operator in terrestrial operation.And, be preferably in replenisher tank 2 and be provided with liquid level tube 3, so that the operator observes the water level in the replenisher tank, when needed, moisturizing in replenisher tank in time.The utility model can utilize prior art, in replenisher tank or liquid level tube, level detecting device is set, and the keying that realizes utilizing the water level in the replenisher tank that level detecting device detects just to come to control automatically control valve 9 by an electric control gear, thereby the automatic water supplement of realization replenisher tank.

Claims

1, a kind of steam boiler automatic water-replenishing device, it is characterized in that this device is to connect water inlet pipe (4) in the bottom of replenisher tank (2), replenisher tank (2) but be provided with the exhaust outlet (1) of capping, connect the filling pipe (10) that leads to boiler on the water inlet pipe, control valve (9) is housed on filling pipe (10), with the water inlet pipe (4) of filling pipe joint bottom on be connected to check valve (5).

2, steam boiler automatic water-replenishing device according to claim 1 is characterized in that being connected to liquid level tube (3) on replenisher tank (2).