CN201306704Y - Auto-control safety valve of vacuum boiler - Google Patents

Abstract

The utility model relates to an auto-control safety valve of a vacuum boiler, which belongs to the field of safety valves in boilers and is suitable for the vacuum boiler. The auto-control safety valve of the vacuum boiler is technically characterized in that a section of pipe communicated with the interior of a boiler casing piece is welded on the boiler casing piece, a lower-layer ring flange is welded with the pipe, an upper-layer ring flange is mounted on the lower-layer ring flange, a diaphragm is mounted between the two ring flanges, the two ring flanges are fixed by a screw, a bracket is fixed on the upper-layer ring flange, and a micro travel switch and a knife are fixed on the bracket by nuts. The utility model has the beneficial effect that when a failure occurs, the vacuum boiler has the pressure-releasing safety protection function and auto-control warning function, thereby ensuring the safe operation of the boiler.

Description

The vacuum boiler autocontrolled safety valve

One: technical field:

The utility model belongs to the safety valve field in the boiler.

Two: background technology:

Existing vacuum boiler safety valve great majority adopt the fusion bolt, when temperature reaches certain value, and the just fusing of fusion bolt, the pressure in the vacuum boiler comes out by the hole bleed off of fusion bolt.The safety valve that adopts the fusion bolt to do vacuum boiler is available, but the shortcoming that it is arranged, shortcoming is: after sneaking into incoagulable gas in the vacuum boiler, the partial pressure of steam reduces, cause the vacuum boiler temperature inside to reduce, make boiler internal pressure surpass permissible value, but temperature does not also reach the temperature of fusion bolt fusing, do not have the effect of safety valve, the hidden danger that has the bursting of boilers, want to accomplish not to be subjected to the influence of boiler internal incoagulable gas, have only the vacuum boiler safety valve is improved.

Three: technology contents:

The purpose of this utility model is exactly to design a kind of influence that is not subjected to incoagulable gas, can report to the police and vacuum boiler autocontrolled safety valve that can automatically unloading.

The technical method that the utility model technical solution problem is adopted is: the pipe that communicates in one section of welding and the boiler shell on the housing of boiler, be welded with lower floor's ring flange on the pipe, the upper strata ring flange is housed on lower floor's ring flange, between two ring flanges diaphragm is housed, two ring flanges also are screwed, on the ring flange of upper strata, fix a support, fix a micro limit switch with nut on the support, on support, also fix a cutter.

The utility model beneficial effect is: have release safety protection function and automatic control alarm function when the vacuum boiler runs into fault, this two function is guaranteed the vacuum boiler safe operation.

Four: description of drawings:

Accompanying drawing 1 is the cross-sectional schematic of facing of the present utility model, and Fig. 2 is the side-looking cross-sectional schematic of Fig. 1.

Five: the specific embodiment:

1. Fig. 2 describe the details of the present utility model and the course of work in detail in conjunction with the accompanying drawings.On the housing 11 of boiler the welding one section with boiler shell spare in 6 pipes that communicate 12, be welded with lower floor's ring flange 1 on the pipe, upper strata ring flange 3 is housed on lower floor's ring flange, diaphragm 2 is housed between two ring flanges, two ring flanges 1,3 are also fixing with screw 10, fix one shelf on upper strata ring flange 3, fix a micro limit switch 5 with nut on the support, on support, also fix a cutter 4.Diaphragm 2 is to be made by the silicane rubber plate of favorable elasticity.In the housing 11 of vacuum boiler; normal condition is a negative pressure; will produce malleation in abnormal situation, diaphragm 2 is heaved, this is heaved will jack-up micro limit switch 5; micro limit switch is triggered; send signal, tell boiler control system, the pressure of boiler internal has been converted to malleation; boiler control system starts the self-lock protection function immediately, the burning of burn-out device.If unexpected situation is arranged, control system fails to make a response, and pressure continues to rise, and diaphragm 2 continues upwards to heave, and when running into cutter 4, cutter will puncture diaphragm 2, makes the high steam release in the boiler, has protected boiler.In order to prevent that micro limit switch 5 oneself from destroying diaphragm 2, select the micro limit switch that roller is housed on the feeler lever end of micro limit switch 5 for use, roller is difficult for puncturing diaphragm.For the steam in the housing 11 evenly rush at diaphragm 2, have a plurality of holes 9 that go out steam in the centre of lower floor's ring flange 1.Because the effect in roller 7 and hole 9 guarantees that the utility model operation is normal, has just guaranteed that also the operation of vacuum boiler is normal.

Claims (2)

1. vacuum boiler autocontrolled safety valve, it is characterized in that: go up one section pipe (12) that communicates with (6) in the boiler shell of welding at the housing (11) of boiler, be welded with lower floor's ring flange on the pipe, upper strata ring flange (3) is housed on lower floor's ring flange (1), diaphragm (2) is housed between two ring flanges, two ring flanges (1,3) are also fixing with screw (10), on upper strata ring flange (3), fix a support, fix a micro limit switch (5) with nut on the support, on support, also fix a cutter (4).

2. a kind of vacuum boiler autocontrolled safety valve according to claim 1 is characterized in that: have a plurality of holes (9) that go out steam in the centre of lower floor's ring flange (1).

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