CN2377445Y

CN2377445Y - Combined safety valve

Info

Publication number: CN2377445Y
Application number: CN 99215740
Authority: CN
Inventors: 户瑞兰; 高志; 高长安
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-06-30
Filing date: 1999-06-30
Publication date: 2000-05-10
Anticipated expiration: 2009-06-30

Abstract

The utility model relates to a combined safety valve used on boilers. The combined safety valve is formed by that two valve bodies are fixed on a metal tube frame with one inlet and two outlets. The top ends of the two valve bodies are provided with two tooth gears with same diameter and the teeth of the two tooth gears are engaged. Each tooth gear is provided with a shaft core sleeve for a valve slide. A slide shaft penetrates through the center of the tooth gears and is fixed on the shaft core sleeve for a valve slide through a fastener. A tensioning ring is fixed on the lower ends of the two tooth gears, the teeth of which are engaged, to ensure the tooth gears to rotate in an engaging state and keeps two valves in a state that one valve is open and the other valve is close or in a semishrouded state. Therefore, no misoperation can occur and no explosion accident can be generated. Once a valve slide falls off, after pressure is generated in the boiler, an explosion-proof member in an explosion-proof tube is cracked, and vapor is exhausted from the explosion-proof tube.

Description

The combination safety-valve

The utility model belongs to a kind of valve, the combination safety-valve that particularly a kind of boiler uses, has a valve body (4), a flashboard that has axle (14), this flashboard passes through the overhang bracket of axle (14) in valve body (4), turning cylinder (14) can make flashboard move up and down, thereby opening and closing are by the fluid of valve body (4).

In order to prevent that explosion accident from appearring in boiler in running, existing method is to be provided with two pipelines at boiler, on every pipeline valve is installed, and under the normal condition, valve is in out one and closes.Pressure gauge, safety valve, fireman are installed in the upper end of boiler see the table handling controlled valve, this method fireman's labour intensity on the one hand is big, makes troubles in operation, on the other hand, in case safety valve is malfunctioning or operate wrongly, the quick-fried accident of doing will occur.

The purpose of this utility model is to avoid the weak point of above-mentioned prior art that a kind of no matter boiler gas production size is provided, can not occur owing to Boiler Steam can't be drained the combination safety-valve that produces explosion accident, this valve is in a kind of normal open state for a long time, maloperation and processing can not appear simply, and easy to install.

The purpose of this utility model is achieved in that on one one metal pipe frame that advances scene 2, be fixed with valve, the top of this valve body has two to gear, the interlock transmission, said identical to the gear diameter, be preset with the valve shaft core retainer plate, when the flashboard in the valve body is in out one when closing the position, valve shaft is passed gear centre be fixed on the valve shaft core retainer plate by securing member, tensioning ring is fixed on two lower ends to gear, to guarantee gear interlock transmission.

Have explosion stack at an entrance point that advances the scene 2 metal pipe frame, this explosion stack is made up of silk head, loose joint, is placed with the rupture pressure disc that a kind of nonferrous materials plate is made in the loose joint, can break when meeting pressure.

The utility model is because two symmetrical valve gear interlock transmissions, guarantees that valve one opens one and close or two valves are in half-open semi-closure state simultaneously, and therefore, the steam that boiler produces will be discharged from the valve pipe of coupling.In case valve shaft or flashboard come off, boiler generation pressure then rupture pressure disc breaks, steam is discharged from explosion stack fully, make boiler be in a safe condition down operation all the time, also fireman's maloperation can not occur, effectively prevented the generation of boiler explosion accident, the utility model is rational in infrastructure simultaneously, make simply, installation, easy to use does not have specific (special) requirements to operating condition.

Accompanying drawing and drawing are described as follows:

Fig. 1 is the utility model general assembly drawing

Fig. 2 is the utility model security protection frame, tensioning ring structure chart

Fig. 3 is the utility model explosion stack structure chart

Below in conjunction with accompanying drawing the utility model is further described:

With reference to Fig. 1, has one one metal pipe frame (1) that advances scene 2, by loose joint (2,7), in connect (3,6) valve (4) be fixed on the metal pipe frame (1), the top of valve body (4) have two diameters identical to gear (5), interlock transmission, gear (5) is preset with valve shaft core retainer plate (10), when the flashboard in the valve body (4) is in out one when closing the position, valve shaft (14) is passed the center of gear (5), be fixed on the valve shaft core retainer plate (10) by nut (11).

With reference to Fig. 1, Fig. 2, in the upper end of valve body (4), two lower ends to gear, be welded with tensioning ring (8), guarantee to gear (5) interlock transmission, in order to prevent fireman's gear card in operation hand, be provided with security protection frame (9) in the centre of two gears, the one end inserts in the nut (12) that is welded in advance on the metal pipe frame (1), is fixed by bolt (13), also can remove protective frame, at the default crank way of a side of gear (5), gear is rotated by crank.

With reference to Fig. 1, Fig. 3, explosion stack (15) is made up of silk head (16), loose joint (17), in loose joint (17), be placed with rupture pressure disc (18), this rupture pressure disc by the nonferrous materials plate for example lead make, according to boiler gas production size, make different-thickness, when reaching certain pressure, rupture pressure disc (18) breaks, and this explosion stack (15) is installed in an import department of entering scene 2 metal pipe frame (1), also can be installed in the top of boiler.

With reference to Fig. 1, one advances two outlets of scene 2 metal pipe frame (1), and an outlet is towards using the steam place, and the waste-heated water-tank is led in another outlet, and the interlock transmission owing to gear (5) makes two valves be in out one all the time and closes, or half-open semi-closure state.

The utility model can be according to different boiler design requirements, and the combination safety-valve of preparation different size also can use on other pressure vessel.

Claims

1, a kind of combination safety-valve, the combination safety-valve that particularly a kind of boiler uses, has a valve body (4), a flashboard that has axle (14), this flashboard pass through the overhang bracket of axle (14) in valve body (4), and turning cylinder (14) can make flashboard move up and down, it is characterized in that: also comprise one one metal pipe frame (1) that advances scene 2, fixed valve valve body (4) on it, the top of this valve body (4) have two to gear (5), interlock transmission.

2, combination safety-valve according to claim 1, it is characterized in that: two identical to gear (5) diameter, be preset with valve shaft core retainer plate (10), valve shaft (14) passes the center to gear (5), is fixed on the valve shaft core retainer plate (10) by securing member (11).

3, combination safety-valve according to claim 1, it is characterized in that: an entrance point that advances scene 2 metal pipe frame (1) is provided with explosion stack (15), this explosion stack (15) is by silk head (16), and loose joint (17) is formed, and is placed with rupture pressure disc (18) in the loose joint (17).

4, combination safety-valve according to claim 3 is characterized in that: rupture pressure disc (18) is made by the nonferrous materials plate.

5, combination safety-valve according to claim 1 and 2 is characterized in that: two lower ends to gear (5) are fixed with tensioning ring (8), to guarantee gear interlock transmission.