CN114135700A

CN114135700A - Multi-section pressure release valve of boiler

Info

Publication number: CN114135700A
Application number: CN202111454555.XA
Authority: CN
Inventors: 刘杰; 杜志鹃; 郭琳琳; 胡国华; 杨汀; 蒋华峰; 邱薇; 林承运; 王书水
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-01
Filing date: 2021-12-01
Publication date: 2022-03-04
Anticipated expiration: 2041-12-01
Also published as: CN114135700B

Abstract

The invention provides a multi-section type pressure release valve of a boiler, and belongs to the technical field of machinery. It has solved prior art and has had the poor problem of stability. The multi-section pressure relief valve of the boiler comprises a valve body and a valve core, wherein a cavity is formed inside the valve body, the valve core is rod-shaped and is connected into the valve body, an inlet is formed in the bottom of the valve body, an outlet is formed in the side part of the valve body, the lower part of the valve core is positioned between the inlet and the outlet, the multi-section pressure relief valve further comprises an elastic locking unit, a locking block and a pressing rod, the locking block is fixedly connected to the upper end of the valve core, the elastic locking unit is positioned in the valve body and is uniformly distributed along the length direction of the valve core, the inner end of the pressing rod extends into the valve body and abuts against the locking block, the outer end of the pressing rod extends out of the upper part of the valve body, and after the valve core is pushed by pressure, the locking block can be connected with any one elastic locking unit. The multi-section pressure release valve of the boiler has high stability.

Description

Multi-section pressure release valve of boiler

Technical Field

The invention belongs to the technical field of machinery, and relates to a multi-section type pressure release valve of a boiler.

Background

When the pressure in the boiler reaches a set value, the pressure release valve can be opened for protecting the safe use of the boiler.

The existing pressure relief valves are usually opened beyond a set pressure value, and because the internal pressure of the boiler is relatively high, a plurality of pressure relief valves are usually arranged on the boiler for safety.

This causes an increase in boiler cost.

Chinese patent publication No. CN208967144U discloses a safe explosion-proof pressure release valve device for steam pressure-bearing boiler, which is suitable for electric boilers and fuel boilers, and has rapid pressure release and higher durability, and comprises a boiler body and a pressure release valve tube, wherein the lower end of the pressure release valve tube can be sleeved on a valve port of the boiler body, the inner wall of the pressure release valve tube is provided with a circle of object-placing ring, on which a cylindrical pressure-bearing heavy object is placed, the pressure-bearing heavy object falls on the object-placing ring under the action of gravity and seals a pressure release hole on the wall of the pressure release valve tube, so that the pressure can be automatically released when a certain pressure value is reached or exceeded in the boiler body, thereby preventing the boiler body from exploding, the top port of the pressure release valve tube is provided with a top cover, the lower end face of the top cover is provided with a magnet body, the upper end face of the pressure-bearing heavy object is made of magnetic metal, the pressure-bearing heavy object can be pushed to the upper part and absorbed, and can not fall back by itself, the boiler can be always in a pressure release state, the gas can be rapidly discharged from the pressure relief hole.

The pressure release valve of above-mentioned patent is in order to guarantee the security when using on the boiler, still need set up a plurality of pressure release valves on the boiler, leads to boiler cost to increase, and the pressure release valve that quantity is more moreover occupies too much space, leads to its structure not compact.

Disclosure of Invention

The invention aims to provide a multi-stage pressure relief valve of a boiler, which has high stability and can properly reduce the cost of the boiler, aiming at the problems in the prior art.

The purpose of the invention can be realized by the following technical scheme:

the utility model provides a multistage formula relief valve of boiler, includes valve body and case, and above-mentioned valve body is inside to be the cavity, and above-mentioned case is shaft-like and connects in the valve body, the valve body bottom has the import, and the valve body lateral part has the export, and the case lower part is located between import and the export, its characterized in that still includes elasticity locking unit, locking block and depression bar, and above-mentioned locking block links firmly in the case upper end, and above-mentioned elasticity locking unit is located the valve body and sets up along the length direction equipartition of case, and above-mentioned depression bar inner stretches into in the valve body and supports and lean on the locking block, and the depression bar outer end stretches out valve body upper portion, receives pressure pushing effect to move up the back when the case, locking block can with arbitrary one elasticity locking unit between the locking connection.

When the internal pressure of the boiler is overlarge, the high pressure at the inlet acts on the valve core to push the valve core to move upwards.

The multi-section pressure relief valve of the boiler is creatively provided with a plurality of elastic locking units in the valve body. When the locking block on the valve core is contacted with the elastic locking unit at the lowest part, a locking connection is formed between the two. At this time, the outlet portion is opened.

When the high pressure at the inlet is too high, the valve core moves upwards continuously under the action of the high pressure. The locking block is separated from the elastic locking unit at the lower part, and the locking block moving upwards is contacted with the adjacent locking unit at the upper part to form locking connection. At this time, the outlet opening degree becomes large.

And by analogy, when the locking block is contacted with the elastic locking unit at the uppermost part to form locking connection, the outlet is completely opened.

That is, when the outlet is partially opened and cannot meet the pressure relief requirement, the upward movement of the valve core can increase the opening degree of the outlet until the outlet is completely opened. It can be seen that under the effect of this multistage formula relief valve, just can open when exceeding the less degree of set pressure value in the boiler, the effectual stability and the security that has improved the boiler.

The outlet can obviously output steam with naked eyes in the pressure relief process, and after the pressure relief is finished, when the outlet can not output obvious steam, an operator applies pressure to the pressure lever until the valve core moves downwards to completely block the outlet again.

At the moment, the elastic locking unit at the lowest part blocks the upper part of the locking block, so that the outlet is completely closed when the pressure value in the boiler is normal, and the pressure relief condition cannot occur.

In the multi-section pressure release valve of the boiler, the elastic locking unit comprises a locking hole recessed in the inner side of the valve body, a spring and a ball are arranged in the locking hole, a recessed positioning notch is formed in the side part of the locking block, and the ball tends to be embedded into the positioning notch under the elastic force action of the spring.

The ball can stable embedding locking block's location notch under the spring force effect of spring, in case the ball is connected with the location notch, form the locking between locking block and the valve body and be connected.

In the multi-section pressure release valve of the boiler, the pressure rod is positioned at the center of the valve core and is positioned on the ball at the upper part of the locking block, the outer side of the ball is abutted against the pressure rod, and the inner side of the ball is positioned in the locking hole.

Other round beads which are not embedded into the locking block abut against the pressure rod, so that the round beads are prevented from falling off from the locking hole.

In the multi-section pressure release valve of the boiler, the valve body is also connected with a cylindrical positioning sleeve, the middle part of the pressure rod penetrates through the positioning sleeve, and the lower end of the pressure rod is connected with the locking block.

The middle part of the pressure lever is positioned through the positioning sleeve.

Because the lower end of the pressure lever is connected with the locking block, the structure can avoid the contact of the pressure lever and the inner wall of the valve body, and the stability is properly improved.

In the multi-section pressure release valve of the boiler, the cross section of the pressure rod is rectangular, the inner cavity of the positioning sleeve is matched with the pressure rod, the upper end of the locking block is provided with a concave connecting notch matched with the pressure rod, and the lower end of the pressure rod is embedded in the connecting notch.

The lower end of the pressure rod is connected with the locking device, the middle part of the pressure rod is fixed with the circumferential direction of the connecting sleeve, and the structure can ensure that the connecting notch on the locking block always faces the locking hole.

In the multi-stage pressure relief valve of the boiler, the size of the inlet is smaller than the size of the outer diameter of the valve core.

In the multi-section pressure relief valve of the boiler, the width dimension of the outlet is smaller than the outer diameter dimension of the valve core, and the height dimension of the outlet is 4-8 times of the outer diameter dimension of the valve core.

The structure can ensure that the outlet can be gradually opened after the valve core moves upwards.

In the multi-section pressure release valve of the boiler, the lower end of the valve core is fixedly connected with a sealing ring, and the lower part of the sealing ring is provided with a deformation groove which is concave in an annular shape.

The sealing ring can expand under the action of air pressure, and the sealing property between the lower end of the valve core and the valve body is further improved.

In the multi-section pressure release valve of the boiler, the locking block and the valve core are of an integrated structure, a first guide cavity matched with the locking block and a second guide cavity matched with the valve core are formed in the valve body, the locking block is located at the first guide cavity, and the valve core is located at the second guide cavity.

The locking block can move up and down stably under the action of the first guide cavity, and the valve core can move up and down stably under the action of the second guide cavity.

In the multi-stage pressure relief valve of the boiler, the side of the valve body is provided with a planar connecting part, and the upper part and the lower part of the connecting part are provided with connecting holes.

After the connecting part is contacted with the surface of the boiler equipment, the fastener is arranged in the connecting hole in a penetrating way to enable the whole pressure release valve to be stably and fixedly connected on the boiler.

Compared with the prior art, the multi-section type pressure release valve of the boiler can realize pressure release when the pressure in the boiler exceeds the smaller degree of the set pressure value, and can also realize pressure release when the pressure in the boiler exceeds the larger degree of the set pressure value, so that one multi-section type pressure release valve is installed on the boiler, and the boiler cost is properly reduced.

Meanwhile, the locking block and any elastic locking unit can form stable locking connection, and the locking block can also be stably separated from the elastic locking unit under the action of high pressure, so that the locking device is high in stability and has high practical value.

Drawings

Fig. 1 is a schematic sectional view of a multi-stage pressure relief valve of the boiler.

Fig. 2 is a schematic perspective view of a valve core in a multi-stage pressure relief valve of the boiler.

In the figure, 1, a valve body; 1a, an inlet; 1b, an outlet; 1c, a locking hole; 1d, a first guide cavity; 1e, a second guide cavity; 1f, a connecting part; 1g, connecting holes; 2. a valve core; 3. a locking block; 3a, a positioning notch; 3b, connecting the notches; 4. a pressure lever; 5. a spring; 6. a ball; 7. a positioning sleeve; 8. and (5) sealing rings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly mounted on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 and 2, the multi-stage relief valve of the boiler comprises a valve body 1 and a valve core 2, wherein the valve body 1 is internally provided with a cavity, the valve core 2 is rod-shaped and is connected in the valve body 1, the bottom of the valve body 1 is provided with an inlet 1a, the side of the valve body is provided with an outlet 1b, and the lower part of the valve core 2 is positioned between the inlet 1a and the outlet 1 b.

The valve core locking device is characterized by further comprising elastic locking units, locking blocks 3 and pressing rods 4, the locking blocks 3 are fixedly connected to the upper end of the valve core 2, the elastic locking units are located in the valve body 1 and are evenly distributed along the length direction of the valve core 2, the inner ends of the pressing rods 4 stretch into the valve body 1 and abut against the locking blocks 3, the outer ends of the pressing rods 4 stretch out of the upper portion of the valve body 1, and after the valve core 2 moves upwards under the action of pressure pushing, the locking blocks 3 can be connected with any one elastic locking unit in a locking mode.

The elastic locking unit comprises a locking hole 1c which is concave on the inner side of the valve body 1, a spring 5 and a ball 6 are arranged in the locking hole 1c, a concave positioning notch 3a is arranged on the side of the locking block 3, and the ball 6 has the tendency of being embedded into the positioning notch 3a under the action of the elastic force of the spring 5.

The pressure lever 4 is positioned at the center of the valve core 2 and is positioned on a ball 6 at the upper part of the locking block, the outer side of the ball 6 is abutted against the pressure lever 4, and the inner side of the ball 6 is positioned in the locking hole 1 c.

The valve body 1 is also connected with a cylindrical positioning sleeve 7, the middle part of the pressure lever 4 is arranged on the positioning sleeve 7 in a penetrating way, and the lower end of the pressure lever 4 is connected with the locking block 3.

The section of the compression bar 4 is rectangular, the inner cavity of the positioning sleeve 7 is matched with the compression bar 4, the upper end of the locking block 3 is provided with a concave connecting notch 3b matched with the compression bar 4, and the lower end of the compression bar 4 is embedded in the connecting notch 3 b.

The size of the inlet 1a is smaller than the outer diameter of the valve core 2.

The width dimension of the outlet 1b is smaller than the outer diameter dimension of the valve core 2, and the height dimension of the outlet 1b is 4-8 times of the outer diameter dimension of the valve core 2.

The lower end of the valve core 2 is fixedly connected with a sealing ring 8, and the lower part of the sealing ring 8 is provided with an annular concave deformation groove.

The locking block 3 and the valve core 2 are of an integrated structure, a first guide cavity 1d matched with the locking block 3 and a second guide cavity 1e matched with the valve core 2 are formed in the valve body 1, the locking block 3 is located at the first guide cavity 1d, and the valve core 2 is located at the second guide cavity 1 e.

The valve body 1 has a flat connecting portion 1f at a side portion thereof, and the connecting portion 1f has connecting holes 1g at upper and lower portions thereof.

In order to make the locking block smoothly pass over the ball, the edge of the locking block is provided with a transition part with smooth transition. In this embodiment, the transition portion is a chamfer on the edge of the locking block.

The features of the above-described embodiments may be arbitrarily combined, and for the sake of brevity, all possible combinations of the features in the above-described embodiments are not described, but should be construed as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the features.

It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that suitable changes and modifications of the above embodiments are within the scope of the claimed invention as long as they are within the spirit and scope of the present invention.

Claims

1. The utility model provides a multistage formula relief valve of boiler, includes valve body and case, and above-mentioned valve body is inside to be the cavity, and above-mentioned case is shaft-like and connects in the valve body, the valve body bottom has the import, and the valve body lateral part has the export, and the case lower part is located between import and the export, its characterized in that still includes elasticity locking unit, locking block and depression bar, and above-mentioned locking block links firmly in the case upper end, and above-mentioned elasticity locking unit is located the valve body and sets up along the length direction equipartition of case, and above-mentioned depression bar inner stretches into in the valve body and supports and lean on the locking block, and the depression bar outer end stretches out valve body upper portion, receives pressure pushing effect to move up the back when the case, locking block can with arbitrary one elasticity locking unit between the locking connection.

2. The multi-stage pressure relief valve for a boiler according to claim 1, wherein the elastic locking unit comprises a locking hole recessed inside the valve body, the locking hole has a spring and a ball, the side of the locking block has a recessed positioning notch, and the ball has a tendency to be inserted into the positioning notch under the elastic force of the spring.

3. The multi-stage pressure relief valve for a boiler according to claim 1, wherein the pressure lever is located at the center of the valve core and is a ball located at the upper portion of the locking block, the outer side of the ball abuts against the pressure lever, and the inner side of the ball is located in the locking hole.

4. The multi-stage pressure relief valve for a boiler according to claim 1, wherein the valve body is further connected with a cylindrical positioning sleeve, the middle part of the pressure rod is inserted into the positioning sleeve, and the lower end of the pressure rod is connected with the locking block.

5. The multi-stage pressure relief valve for a boiler according to claim 1, wherein the cross section of the pressure rod is rectangular, the inner cavity of the positioning sleeve is matched with the pressure rod, the upper end of the locking block is provided with a concave connecting notch matched with the pressure rod, and the lower end of the pressure rod is embedded in the connecting notch.

6. The multi-stage pressure relief valve for a boiler of claim 1 wherein the inlet dimension is less than the valve spool outer diameter dimension.

7. The multi-stage pressure relief valve for a boiler of claim 1 wherein the outlet has a width dimension less than the outside diameter dimension of the spool and a height dimension 4 to 8 times the outside diameter dimension of the spool.

8. The multi-stage pressure relief valve for a boiler according to claim 1, wherein a sealing ring is fixedly connected to a lower end of the valve core, and a deformation groove recessed in an annular shape is formed in a lower portion of the sealing ring.

9. The multi-section pressure relief valve for a boiler according to claim 1 wherein the locking block and the valve core are of an integral structure, the valve body has a first guide cavity matching the locking block and a second guide cavity matching the valve core, the locking block is located at the first guide cavity, and the valve core is located at the second guide cavity.

10. The multi-stage pressure relief valve for a boiler according to claim 1, wherein said valve body side portion has a connecting portion having a planar shape, and said connecting portion has connecting holes at upper and lower portions thereof.