CN2192775Y

CN2192775Y - Seal square mortar valve

Info

Publication number: CN2192775Y
Application number: CN 94211762
Authority: CN
Inventors: 鲍哲荣; 李正一; 罗运纶
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-05-07
Filing date: 1994-05-07
Publication date: 1995-03-22
Anticipated expiration: 2004-05-07

Abstract

The utility model relates to a seal square mortar valve, which comprises a valve body, a valve plate 3 and a driving device. The valve body is provided with a square channel, an inclination angle alpha is arranged on the top end of the valve plate 3, and the inclination angle alpha is also arranged on the end surface of the guide rail of the valve body. When the valve plate 3 is positioned in the closing position, the inclination angle alpha enables the valve plate to have upward force to cause the valve plate to be tightly contacted with a seal surface without internal leakage and caking. A rubber seal strip 4 and a rubber seal strip 15 are arranged between the valve plate and the valve body to enable the valve not to leak outwards. The seal square mortar valve is suitable for the ash discharge of the electrostatic dust collection for fired power plants and heat power plants, and the seal square mortar valve is also suitable for controlling powdery materials of other industries.

Description

Seal square mortar valve

The utility model relates to valve, particularly relates to gate valve.

Modern is the large enterprise of fuel with the coal, as thermal power plant, thermoelectricity plant, heating factory etc., its flue gas of arranging is in order to meet the requirement of environmental regulations, all need flue gas is carried out purified treatment, electrostatic precipitation is exactly one of processing method, and flue gas is purified after electrostatic precipitation is handled, and small powder ash wherein promptly drops on the bottom of deduster and discharges through the grey valve that falls.

The now employed grey valve that falls, mostly be gate valve, there are several problems to overcome, the temperature of powder ash is between 150-250 ℃, powder ash diameter is very little, and average diameter is about 0.032 millimeter, so very easily mobile, escape, one of problem be the powder ash very easily the another side that drains to valve plate of the gap between valve plate and slideway go, be to be interior leakage; Two of problem is that the grey outside that can drain to valve between valve plate and valve seal gap of powder is come, and is for leaking outside; Three of problem is powder ashes when at high temperature the long period is static, and very easy caking can form very hard caking through extruding energetically again between valve plate and slideway, and they have increased the wearing and tearing of valve, make valve event ineffective, even can be stuck and can not open and close; Four of problem is because the present grey valve that falls mostly is garden shape passage, can not coordinate with the square of bottom of electrical precipitator, so also need establish connecting tube again, increased the height of equipment,, can form the dead angle in four angle parts of square-section and lump once cooperate badly, this caking enlarges gradually, runner is diminished, and ash discharge is not smooth, influences work.

The purpose of this utility model provides a kind of grey valve, and it can overcome above-mentioned shortcoming, and its runner is square, and can eliminate caking, interior leakage, leaks outside, and eliminates caking and stuck phenomenon, and can stand 250 ℃ temperature.

The purpose of this utility model is realized by following scheme, sealing square ash valve has valve body, be contained in valve plate and the transmission device that is contained on the valve body in the valve body, said valve body is by square frame shape valve body and ［ the font guide rail is connected and forms, have square hole in the middle of the valve body, form square duct, valve plate slides in the groove of valve body, on the valve plate, on the groove of lower plane and valve body, lower plane constitutes sealing surface, the sealing face is narrower, avoid depositing the powder ash and the stuck valve plate that lumps, top end at valve plate has the inclination angle, and ［ end face of word also has the inclination angle to guide rail, and they match, when valve closes when dead, this inclined-plane makes valve plate have a component and the last sealing surface of the last sealing surface of valve plate and valve body tightly is close to and do not make interior leakage upwards; Side at extracted out the valve plate of valve body is equipped with the sealing of heat resistant rubber system, thereby has prevented leaking outside of dust between the above and below of valve body and valve plate and the bi-side.

Said heat resistant rubber is silicone rubber or fluorine rubber, can accompany the teflon bar in the said sealing with the increase wear resistance, and can have the steel skeleton.

Below in conjunction with drawings and Examples sealing square ash valve of the present utility model is explained in detail;

Fig. 1 is the sectional view of the utility model sealing square ash valve;

Fig. 2 is the top view of the utility model sealing square ash valve;

Fig. 3 is the schematic representation that valve body and guide rail are screwed.

As Fig. 1, the ash valve comprises handwheel 12, leading screw 11, support 10, link 9, they are identical with the transmission device of the valve of routine, when rotating handwheel, drive leading screw and make the valve plate motion finish the switching of valve, this figure is depicted as the schematic representation of manual valve, certainly also available electronic, pneumatic or other modes are operated, this grey valve also comprises the valve body 2 that is a square frame shape, the square hole of opening in the middle of the valve body is promptly as square runner, on valve body has, following two, there is guide rail 1 two centres, this guide rail becomes ［ shape, uniform thickness, two valve bodies and guide rail can fix with screw 17, as Fig. 3, also available riveted joint or additive method are fixed, but fixedly rear valve body on, following two sides need process smooth to be connected with the flange of pipeline, join the through hole 13 of usefulness as Fig. 1 with flange, shown in 2, extract end out at the valve plate of valve body and can not get through the hole, then use screw 6, as shown in Figure 1, and position 14 is positions of set screw 17, and flange fixed hole 13 staggers mutually with the position of set screw 17, and the width of the square hole of valve body should be less than the guide rail ［ inside dimension of the opening of shape, to form groove in both sides and end, the degree of depth of groove is A(such as Fig. 3), valve plate 3 slides in this groove, on the valve plate, on the groove of following two planes and valve body, two planes form sealing surface down, the sealing face is narrower, so be difficult for depositing the powder ash, the top end of valve plate has an inclination alpha, and the inclination alpha of the end face of this inclination angle and guide rail 1 matches (as shown in fig. 1), like this, when valve plate reaches the choke-out position, make valve plate 3 that a component that makes progress be arranged, and the last sealing surface of valve plate and the sealing surface of upper valve body are tightly offseted so can not leak ash.The thickness of valve plate 3 is little than the thickness of guide rail 1, form the gap of sealing strip, upper and lower gap sum is between 0.08-0.15mm, the sideshake of valve plate and guide rail is between the 0.5-1.5 millimeter for the both sides sum then, the width of sealing surface is about the 4-6 millimeter, and α is then different for 45-60 ° of size of all looking valve.

Valve plate 3 is by the stainless steel manufacturing, 1Cr13 preferably, and to have certain rigidity, valve body and guide rail are then by the high quality cast iron manufacturing.

The side that can in valve body, slide and extract out at valve plate, on the valve plate, the lower plane place, twice rubber weather strip 4 is housed on the valve body, it is covered with the width of whole valve plate, side at valve plate, Stamping Steel Ribbon 15 also is housed on the valve body, leaks outside to prevent the powder ash, Stamping Steel Ribbon all is contained in the groove of valve body, Stamping Steel Ribbon 4 can be a rubber, also can middle be embedded with or be stained with teflon bar 5, (as shown in Figure 1), bar 5 should exceed rubber 1 millimeter, to increase the wear resistance and the life-span of Stamping Steel Ribbon, on the top of one Stamping Steel Ribbon 4 outside an iron plate 8 is arranged, can regulate the pressure of Stamping Steel Ribbon with jackscrew 7, jackscrew 7 should have on several length that are distributed in Stamping Steel Ribbon, Stamping Steel Ribbon 15 can be a rubber, but in order to increase rigidity, reason is not rubbed back and forth and is out of shape, and can add the skeleton 16 of steel in the centre.

Above-mentioned Sealing is the heat resistant rubber manufacturing, as fluorine rubber or silicone rubber.

Sealing square of the present utility model ash valve is because above structural feature, when valve closes when dead, can make valve plate tightly be against sealing surface so do not understand interior leakage, can not deposit the powder ash yet,, have Stamping Steel Ribbon 4,15 so can not lump or stuck, can eliminate and leak outside, be again square duct, do not have caking phenomenon, so can be widely used in power plant, the control of thermoelectricity plant and other industry granular material will significantly reduce the generation of accident and save maintenance and maintenance time.

Claims

1, a kind of sealing square ash valve, have valve body, valve plate 3 and transmission device, it is characterized in that said valve body is by square frame shape valve body 2 with [font guide rail 1 fixes and forms, have square hole in the middle of the valve body, guide groove and upper and lower sealing surface are arranged on the valve body, the last lower plane of valve plate 3 contacts with sealing surface, the top end of valve plate 3 has inclination alpha, the end face of guide rail 1 also has inclination alpha, and the side in that valve body can be extracted valve plate 3 out is equipped with Stamping Steel Ribbon 4 and 15 between the top and bottom of valve body and valve plate and the bi-side.

2, by the said sealing square ash of claim 1 valve, it is characterized in that said valve plate is by the stainless steel manufacturing.

3, by the said sealing square ash of claim 1 valve, it is characterized in that said Stamping Steel Ribbon 4 has pressing plate 8 and jackscrew 7 at outer one place.

4, by the said sealing square ash of claim 1 valve, it is characterized in that being embedded with or being stained with teflon bar 5 in the said Stamping Steel Ribbon 4.

5, by the said sealing square ash of claim 1 valve, the material that it is characterized in that said Stamping Steel Ribbon 4,15 is fluorine rubber or silicone rubber.