CN1060146A

CN1060146A - Double passage float ball drain valve

Info

Publication number: CN1060146A
Application number: CN 90105736
Authority: CN
Inventors: 包明伦
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-09-17
Filing date: 1990-09-17
Publication date: 1992-04-08

Abstract

A kind of float-ball type Twin channel drain valve, form by valve body, ball float, lever, spool, bimetallic strip, spring, adjusting screw etc., be characterized in having on the spool two conical surfaces flap in the same way, one of them is adjustable, close or open valve port on two on the valve body simultaneously with the assurance flap, direction is opposite for last lower Disc active force is identical for medium, and making the switch balance of power is zero, so available less ball float comes the bigger valve port of switch, and applicable to higher pressure.Because the effect of bimetallic strip, spool is often opened at normal temperatures in addition, effectively deaeration and not the time spent drain ponding, prevent bursting by freezing, and can avoid producing vacuum and prevent that flood from taking place.

Description

Double passage float ball drain valve

The present invention is a kind of mechanical drain valve.

In steam-heating system and compressed air system, often need drain the water away, can not leak vapour or gas again simultaneously.For this reason, often adopt drain valve.Its principle is to utilize the float (as ball float, keg float or floating butterfly etc.) can the effect of lifting with the variation of water level in the valve body, the keying that comes control valve.

As shown in Figure 1, valve body 1 is vertical configuration and installs, ball float 3 is positioned at valve export 4, when the condensed water in the valve amasss to a certain degree, and ball 3 come-ups, ponding spills from exporting 4, after treating that water level is reduced to a certain degree, ball float 3 is got back to outlet again, makes valve closing, because of the buoyancy of ball float 3 by ponding moves, so vapour or gas can not leak.The defective of this valve is that volume is bigger, discharge capacity is less, cost is higher, and suitable pressure is lower, and the ball float that with the diameter is φ 120 is an example, its water displacement is one liter, when ball was all under water, suffered buoyancy was 1 kilogram, and ball shell weight is about 0.4 kilogram, its actual buoyancy only is about 0.6 kilogram, this valve to be used for 8kg/cm ²System in, the diameter of valve port must be less than φ 3, ball could play on-off action, if valve port is during greater than φ 3, ball float can can't move because of can not floating the valve port of not opening.And the valve port of φ 3 only can be used for the following drain valve of DN20, has little significance.

Fig. 2 is a kind of through the Ball float steam trap after improving, for avoiding valve port 4 too small, valve port 4 is designed to tilt, tilt angle as shown in the figure is about 30 °, like this under the constant situation of valve body 1 and ball float 3, outlet can be greatly several times, can enlarge its discharge amount, but the wearing and tearing of 3 pairs of valve ports 4 of ball float of this valve are inhomogeneous, and during because of ball float 3 come-ups, the bottom breaks away from valve port 4 earlier, in floating-upward process, ball float 3 produces friction with valve port 4 tops, causes the valve port uneven wear and leaks vapour, influences working life.

Fig. 3 is the lever float ball type drain valve, and an end of lever 6 is a ball float 3, and the other end is a flap 5, utilize lever principle to increase moment, therefore when other condition is constant, can enlarge the diameter of valve port, increase discharge amount, but the physical dimension of this structure is also very big, makes the cost of valve become big.

The objective of the invention is to design a kind of float-ball type Twin channel drain valve of novelty.

Its main technical schemes is that two valve ports are arranged in the valve body, two conical surfaces flap is in the same way arranged on the spool, one of them flap is adjustable, one end of lever is a ball float, the other end is a groove that can cooperatively interact with Xiao who is installed on the spool, utilizes lever, heavy and floating by ball float, on the control spool, move down, close or Open valve, an end that makes progress at spool has bimetallic strip and spring, and this bimetallic strip is curved at normal temperatures, temperature flattens when being increased to 70 ℃, when the condensed water in the valve pocket amassed to a certain degree, ball float rose, and spool descends, valve open, condensed water is discharged.

Advantage of the present invention is:

1, when being used for steam-heating system, can be used to the air infiltrated in the automatic removal system, need not to open bypass valve emptying.

2, when winter, used in the gap, stop to have arranged internal system ponding automatically behind the vapour, prevent bursting by freezing.

3, owing to often open when stopping vapour, vapour system inside can not form vacuum, can prevent water hammering effectively.

4, the spool of this valve guiding is reliable, and good seal, spool and valve port are uniform wear, so working life is longer, the valve inner passage can make valve port be in effectively under the water seal state in the axis bottom, is unlikely gas leakage.

5, the pressure of medium impels spool to close to two of this valve one of flaps in the zone of high pressure, and another is at low pressure area, the pressure of medium impels unlatching, when valve port diameter switch pressure balance simultaneously up and down is 0, so available less ball float is opened bigger valve port, and applicable to higher pressure.

Fig. 1, Fig. 2, Fig. 3 are original 3 kinds of Ball float steam trap schematic representation.

Fig. 4 is a structural drawing of the present invention.

Fig. 5 is that the A of Fig. 4 is to figure.

As shown in Figure 4, ball float 9 can rotate around fulcrum 18 by lever 29, the groove of the lever the other end can slide mutually with Xiao 19 who is fixed on spool 22 middle parts, there is an adjustable flap 24 spool 22 lower ends, there is a fixing flap 28 upper end, and respectively with last, lower valve port 32 matches, bimetallic strip 12 and spring 13 are arranged at last flap 28 tops, the pretightening force that adjusting nut 10 and adjusting screw 11 are used to regulate bimetallic strip, in upper valve base 16 and the lower valve base 23 weep hole 31 is arranged all, and connect with valve body 20 by screw thread, its circular groove that connects on end face and the valve body constitutes two switch passages, internal thread on the adjustable flap 24 is used to regulate the matching relationship of flap conical surface and valve port 32, to guarantee that fixedly flap 28 and adjustable flap 24 are closed simultaneously or opened, lower valve port 32, nut 25 is used to lock adjustable flap, and there is filter screen 8 at import 27 places in valve body 20.

During work, medium enters cavity by the import 27 of valve gap 7 through filter screen 8, in the cavity during evaporated condensation water, ball float sinks, drive lever 29 and rotate, and drive spools 22 by Xiao 19 and rise, make the conical surface of fixedly flap 28 on the spool and adjustable flap 24 withstand the valve port 32 of upper valve base 16 and lower valve base 23 simultaneously around fulcrum 18, throttle down, when certain condensed water was arranged in the cavity, ball float 9 rose, and drove spool 22 and descended, valve open, condensed water is through passage 30, on, lower valve port 32 and weep hole 31 drain into outlet 17, seal ring 21,15 grades are used for sealing, 14 is loam cake, and 26 is lower cover.

The one side that expansion coefficient is big in the bimetallic strip 12 is washed into spill in advance, makes bimetallic strip curved at normal temperatures, after temperature raises, arc flattens, therefore, and at normal temperatures, the total thickness of bimetallic strip 12 is bigger, forces spool 22 to descend and can't close, and often opens at normal temperatures to guarantee valve body, when valve body 20 temperature during greater than 70 ℃, bimetallic strip flattens, and sheet group total thickness is dwindled, do the time spent at spring force, jack-up upwards, at this moment spool is subjected to the ball float effect, just can carry out switch motion.

Claims

1, a kind of Ball float steam trap, by valve body 20, ball float 9, lever 29, spool 22, import 27 and export 17 etc. and form, it is characterized in that spool 22 has conical surface fixedly flap 28 and adjustable flap 24 in the same way, has upper valve base 16 and lower valve base 23 by scyewed joint on valve body 20.

2, drain valve according to claim 1 is characterized in that, bimetallic strip 12 and spring 13 are arranged at spool 22 tops, and bimetallic strip 12 is curved at normal temperatures.

3, drain valve according to claim 1 is characterized in that an end of lever 29 connects ball float 9, and the other end has the groove that can match with Xiao 19 on being fixed on spool 22.

4, drain valve according to claim 1 is characterized in that in upper valve base 16 and the lower valve base 23 weep hole 31 being arranged all, and the circular groove of its end face in valve body 20 constitutes two switch passages.