CN211175521U

CN211175521U - Vacuum valve

Info

Publication number: CN211175521U
Application number: CN201921801842.1U
Authority: CN
Inventors: 王德元
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-10-24
Filing date: 2019-10-24
Publication date: 2020-08-04
Anticipated expiration: 2029-10-24

Abstract

The utility model discloses a vacuum valve, which comprises a valve body, wherein the valve body is provided with a first opening and a second opening which are communicated with each other, the first opening is arranged at the lower end of the valve body, a valve core is arranged in the valve body, the valve core comprises a sealing component, a guide rod fixed at the upper end of the sealing component, a spring and a positioning plate which are arranged on the guide rod in a penetrating way, and a plurality of pressure rods arranged at the upper end of the positioning plate; the valve core can move up and down relative to the valve body to enable the sealing assembly to seal or open the first opening; the guide rod is vertically arranged and can move up and down relative to the positioning plate, the spring is compressed between the positioning plate and the sealing assembly, and the plurality of pressure rods are uniformly distributed around the guide rod; be fixed with the guide block on the valve body inner wall, a plurality of through-holes with the depression bar one-to-one are seted up to the guide block, but the depression bar is worn to locate in the corresponding through-hole and the relative guide block reciprocates, depression bar lower extreme and locating plate butt. The force applied by the positioning plate and the pressure rod acts on the sealing assembly through the spring to achieve the effect of sealing the first opening. After the pressure is released, the spring automatically resets.

Description

Vacuum valve

Technical Field

The utility model belongs to the technical field of the vacuum boiler accessory, especially, relate to a vacuum valve.

Background

The vacuum boiler is in a vacuum state during operation, and when the vacuum boiler has overpressure faults, the pressure possibly exceeds the bearing pressure of the boiler body, so that explosion danger is caused, a vacuum valve needs to be arranged on the vacuum boiler, the pressure can be released when the pressure is overpressure, and the safety of the vacuum boiler is ensured.

The common vacuum boiler is provided with a gravity type vacuum valve or an explosion-proof sheet device. The gravity type vacuum valve has simple structure, poor sealing and no vacuum protection. The explosion-proof piece device is disposable, and the cost of manufacture is high because the explosion-proof piece device needs to be replaced again after one-time explosion.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome the not enough of prior art, provide one kind and can use repeatedly, the fidelity, the superpressure is released, and safe and reliable, the vacuum valve that the cost of manufacture is low.

In order to solve the technical problem, the utility model discloses a following technical scheme:

a vacuum valve comprises a valve body, wherein the valve body is provided with a first opening and a second opening which are communicated with each other, the first opening is formed at the lower end of the valve body, a valve core is arranged in the valve body and comprises a sealing assembly, and the valve core can move up and down relative to the valve body to enable the sealing assembly to seal or open the first opening; the valve core also comprises a guide rod fixed at the upper end of the sealing assembly, a spring and a positioning plate which are arranged on the guide rod in a penetrating way, and a plurality of pressure rods arranged at the upper end of the positioning plate; the guide rod is vertically arranged and can move up and down relative to the positioning plate, the spring is compressed between the positioning plate and the sealing assembly, and the plurality of pressure rods are uniformly distributed around the guide rod; the inner wall of the valve body is fixedly provided with a guide block, the guide block is provided with a plurality of through holes in one-to-one correspondence with the pressure rods, the pressure rods penetrate through the corresponding through holes and can move up and down relative to the guide block, and the lower ends of the pressure rods are abutted to the positioning plate.

The spring is acted on the seal assembly by the force applied by the positioning plate and the pressure rod, and the effect of sealing the first opening is achieved. The pipe seat through first opening and vacuum boiler links to each other, if vacuum boiler internal pressure is greater than the spring pressure on the guide bar, will promote seal assembly upward movement and carry out the pressure release, and gas is discharged by the second opening, guarantees vacuum boiler safety. After the pressure is released, the vacuum valve spring can automatically reset and can be repeatedly used.

The pressing rod is preferably a pressing bolt, the pressing force can be adjusted through the pressing bolt as required, and the pressure relief pressure of the vacuum valve is set.

As a further improvement of the above technical solution:

the upper end of the valve body is provided with a dustproof cover, the upper end of the guide rod extends into the dustproof cover, a manual exhaust assembly connected with the guide rod is arranged in the dustproof cover, and the manual exhaust assembly is used for manually driving the valve core to seal or open the first opening.

When the air needs to be exhausted, the dust cover is uncovered, and the valve core is manually lifted to realize manual air exhaust.

The manual exhaust assembly comprises a jackscrew seat and a plurality of jackscrews in threaded connection with the jackscrew seat, the guide rod is fixed with the jackscrew seat, the jackscrews are uniformly distributed on the periphery of the guide rod, and the lower ends of the jackscrews are abutted to the top wall of the valve body.

Specifically, when the exhaust is needed, the dust cover is uncovered, the jackscrew is screwed downwards, the jackscrew seat, the guide rod and the sealing assembly are lifted, the spring is compressed, and the gas is exhausted through the second opening.

The dustproof cover is further provided with a guide piece, the guide piece is provided with a guide hole, and the upper end of the guide rod penetrates through the guide hole and then is fixed with the jackscrew seat.

The upper end of the guide rod is fixed with the jackscrew seat through a nut after being in threaded connection.

The sealing assembly comprises a sealing cover and a sealing ring arranged at the lower end of the sealing cover, a sealing groove matched with the sealing ring is formed in the inner bottom wall of the valve body, and the sealing groove surrounds the first opening.

The guide blocks are arranged in a plurality and correspond to the pressure rods one by one.

The first opening is in sealed communication with a valve seat.

The second opening is arranged on the side wall of the valve body and is communicated with an exhaust pipe in a sealing mode.

Compared with the prior art, the utility model has the advantages of:

1. the utility model is suitable for a vacuum boiler can set for vacuum valve relief pressure, protects vacuum boiler not superpressure. And the furnace body and the outside are well sealed, the vacuum degree is good, and the problems of poor sealing and overpressure explosion of the vacuum valve during operation are avoided. In addition, the vacuum valve can smoothly return after pressure relief, manual adjustment is not needed, and the vacuum valve can be ensured to be repeatedly used.

2. The adjustable spring vacuum valve of the utility model is safe and reliable; simple manufacture and low cost.

Drawings

Fig. 1 is a schematic structural diagram of a vacuum valve according to an embodiment of the present invention.

Illustration of the drawings: 1. a valve stem seat; 2. a guide block; 3. a seal assembly; 31. a sealing cover; 32. a seal ring; 4. a spring; 5. a guide bar; 6. positioning a plate; 7. a pressure lever; 8. a valve body; 81. a first opening; 82. a second opening; 9. a guide member; 91. a guide hole; 10. a nut; 11. a dust cover; 12. carrying out top thread; 13. a jackscrew seat; 14. and (4) exhausting the gas.

Detailed Description

The invention is further described below with reference to specific preferred embodiments, without thereby limiting the scope of protection of the invention.

Example (b):

as shown in fig. 1, the vacuum valve of the present embodiment includes a valve body 8, the valve body 8 is provided with a first opening 81 and a second opening 82 which are communicated with each other, the first opening 81 is opened at the lower end of the valve body 8, and the first opening 81 is hermetically connected with a pipe seat of a vacuum boiler through a valve pipe seat 1; the second opening 82 is opened on the side wall of the valve body 8, and the second opening 82 is in sealed communication with an exhaust pipe 14.

The valve body 8 is provided with a valve core therein, and the valve core can move up and down relative to the valve body 8 to seal the sealing assembly 3 or open the first opening 81. The valve core comprises a sealing component 3, a guide rod 5 fixed at the upper end of the sealing component 3, a spring 4 and a positioning plate 6 which are arranged on the guide rod 5 in a penetrating way, and a plurality of pressing rods 7 arranged at the upper end of the positioning plate 6. The guide rod 5 is vertically arranged and can move up and down relative to the positioning plate 6, the spring 4 is positioned between the positioning plate 6 and the sealing assembly 3, and the plurality of pressure rods 7 are uniformly distributed around the guide rod 5; be fixed with guide block 2 on the inner wall of valve body 8, guide block 2 sets up a plurality of through-holes with depression bar 7 one-to-one, and depression bar 7 wears to locate in the corresponding through-hole and can reciprocate relative guide block 2, and the lower extreme and the 6 butt of locating plate of depression bar 7. The sealing assembly 3 comprises a sealing cover 31 and a sealing ring 32 arranged at the lower end of the sealing cover 31, a sealing groove matched with the sealing ring 32 is formed in the inner bottom wall of the valve body 8, and the sealing groove surrounds the first opening 81. The seal ring 32 is an O-ring seal.

In addition, the upper end of the valve body 8 is provided with a dust cover 11, the upper end of the guide rod 5 extends into the dust cover 11, the dust cover 11 is internally provided with a guide piece 9, and the manual exhaust assembly is connected with the guide rod 5 and is used for manually driving the valve core to seal or open the first opening 81.

The manual exhaust assembly includes a jack screw base 13 and a plurality of jack screws 12 threadedly coupled to the jack screw base 13. The guide piece 9 is provided with a guide hole 91, and the upper end of the guide rod 5 penetrates through the guide hole 91 and then is in threaded connection with the jackscrew seat 13 and is fixed through the nut 10. The plurality of jackscrews 12 are uniformly distributed around the guide rod 5, and the lower ends of the jackscrews 12 are abutted against the top wall of the valve body 8.

When used for sealing, the spring 4 is mounted on the guide rod 5, and the guide rod 5 is welded with the sealing cover 31. The force exerted by the positioning plate 6 and the pressure rod 7 on the spring 4 acts on the sealing cover 31 and the O-shaped sealing ring 32, so that the sealing effect is achieved. The sealing cover 3 is pressed by a spring 4, the pressing force can be adjusted by a pressing bolt (and a pressing rod 7) according to requirements, and the pressure relief pressure of the vacuum valve is set.

If the internal pressure of the vacuum boiler is greater than the pressure of the spring 4 on the guide rod 5, the sealing cover 31 is pushed to move upwards to release pressure, and gas is exhausted from the exhaust pipe 14, so that the safety of the vacuum boiler is ensured. After pressure is released, the spring can automatically reset.

When the exhaust is needed, the dust cover 11 is uncovered, the jacking wires 12 are screwed downwards, the jacking wire seat 13, the guide rod 5 and the sealing cover 3 are lifted for a certain time, the spring 4 is compressed, and the gas is exhausted through the exhaust pipe 14.

The above description is only for the preferred embodiment of the present application and should not be taken as limiting the present application in any way, and although the present application has been disclosed in the preferred embodiment, it is not intended to limit the present application, and those skilled in the art should understand that they can make various changes and modifications within the technical scope of the present application without departing from the scope of the present application, and therefore all the changes and modifications can be made within the technical scope of the present application.

Claims

1. A vacuum valve comprises a valve body (8), wherein the valve body (8) is provided with a first opening (81) and a second opening (82) which are communicated with each other, the first opening (81) is arranged at the lower end of the valve body (8), a valve core is arranged in the valve body (8), the valve core comprises a sealing component (3), and the valve core can move up and down relative to the valve body (8) to enable the sealing component (3) to seal or open the first opening (81); the valve core is characterized by also comprising a guide rod (5) fixed at the upper end of the sealing component (3), a spring (4) and a positioning plate (6) which are arranged on the guide rod (5) in a penetrating way, and a plurality of pressure rods (7) arranged at the upper end of the positioning plate (6); the guide rod (5) is vertically arranged and can move up and down relative to the positioning plate (6), the spring (4) is compressed between the positioning plate (6) and the sealing assembly (3), and the plurality of pressure rods (7) are uniformly distributed around the guide rod (5); be fixed with guide block (2) on the inner wall of valve body (8), a plurality of through-holes with depression bar (7) one-to-one are seted up in guide block (2), and depression bar (7) wear to locate in corresponding through-hole and guide block (2) relatively reciprocate, the lower extreme of depression bar (7) with locating plate (6) butt.

2. The vacuum valve according to claim 1, wherein the upper end of the valve body (8) is provided with a dust cap (11), the upper end of the guide rod (5) extends into the dust cap (11), and a manual exhaust assembly connected with the guide rod (5) is arranged in the dust cap (11) and used for manually driving the valve core to seal or open the first opening (81).

3. The vacuum valve according to claim 2, wherein the manual exhaust assembly comprises a top thread seat (13) and a plurality of top threads (12) in threaded connection with the top thread seat (13), the guide rod (5) is fixed with the top thread seat (13), the plurality of top threads (12) are uniformly distributed around the guide rod (5), and the lower ends of the top threads (12) are abutted to the top wall of the valve body (8).

4. The vacuum valve according to claim 3, wherein a guide member (9) is further disposed in the dust cap (11), the guide member (9) defines a guide hole (91), and an upper end of the guide rod (5) passes through the guide hole (91) and is fixed to the jackscrew seat (13).

5. The vacuum valve according to claim 3, wherein the upper end of the guide rod (5) is fixed by a nut (10) after being screwed with the jackscrew seat (13).

6. The vacuum valve according to any one of claims 1 to 5, wherein the sealing assembly (3) comprises a sealing cover (31) and a sealing ring (32) arranged at the lower end of the sealing cover (31), and a sealing groove matched with the sealing ring (32) is formed on the inner bottom wall of the valve body (8), and surrounds the first opening (81).

7. The vacuum valve according to any of claims 1 to 5, wherein the guide block (2) is provided in plurality, and the plurality of guide blocks (2) correspond to the pressing rods (7) in a one-to-one manner.

8. Vacuum valve according to any of claims 1-5, characterized in that the first opening (81) is in sealed communication with a valve stem (1).

9. Vacuum valve according to any of claims 1-5, characterized in that the second opening (82) opens onto a side wall of the valve body (8), the second opening (82) being in sealed communication with an exhaust pipe (14).