CN211203014U

CN211203014U - Atmospheric safety valve

Info

Publication number: CN211203014U
Application number: CN201922298365.8U
Authority: CN
Inventors: 樊永康; 穆道容; 魏良磊; 李平娥; 穆丽芸; 樊昌鹏
Original assignee: Lianyungang Jianghai Mechanical Equipment Manufacturing Co ltd
Current assignee: Lianyungang Jianghai Mechanical Equipment Manufacturing Co ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-08-07
Anticipated expiration: 2029-12-19

Abstract

The utility model relates to a relief valve technical field just discloses an atmosphere formula relief valve, including last valve body, lower valve body, the bottom fixed mounting of lower valve body has air inlet joint. This atmospheric safety valve, through the fixed mounting screens ring on the inner wall of lower valve body, and place purpose-made atmospheric pressure membrane on the screens ring, reuse holding plate fixes the atmospheric pressure membrane on the screens ring, two holding plates then utilize the upper junction plate, the lower junction plate is tight, at the upper junction plate, cooperate the upper seal pad between the lower junction plate, the holding plate is wrapped up to the lower seal pad, firstly, in order to protect the holding plate, avoid warping under the pressure effect, secondly, in order to utilize the elasticity of rubber, fill up the gap between the upper junction plate, the lower junction plate, guarantee the upper valve body, the inside gas tightness of lower valve body, once organism internal pressure exceeds the limit value, atmospheric pressure will break the atmospheric pressure membrane, thereby discharge from the blast pipe, compare traditional mechanical type atmospheric safety valve, sensitivity is higher, reaction rate is faster.

Description

Atmospheric safety valve

Technical Field

The utility model relates to a relief valve technical field specifically is an atmospheric relief valve.

Background

The atmospheric relief valve of many units at present adopts mechanical structure, this kind of structure generally includes installation valve casing, the connecting rod, valve gap and round pin axle, parts such as gasket bolt, fix the valve casing on the cylinder with double-end bolt usually, the valve gap is laid on the valve casing through round pin axle and connecting rod and valve casing link together, the main principle of this kind of structure is, when steam turbine exhaust pressure is greater than atmospheric pressure and the dead weight of relief valve gap, blow open the safety valve, this kind of safety valve closes by its dead weight, in order to make the valve gap leak into the air when closing, so need grind the faying face of valve gap and valve casing laminating department, and the precision of requiring grinding is higher, guarantee sealing face department closely to laminate with this, guarantee that the air can't enter, thereby guaranteed steam turbine exhaust cylinder vacuum's requirement.

This kind of structural sensitivity is than lower relatively, the action reaction is slower relatively, when the steam turbine exhaust steam can't be discharged smoothly and the exhaust steam is inside to gather when reaching certain pressure in the cylinder body, this kind of atmospheric relief valve is just started to move to mechanical type, to the lower unit of some parameters the situation can be worse, consequently, this security to the unit operation is a great threat, probably because the increase of internal pressure causes the unit through-flow clearance to change, the cylinder body slightly warp even, so the utility model provides an atmospheric relief valve

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides an atmospheric safety valve possesses sensitivity height, and the reaction waits fast advantage, has solved traditional atmospheric safety valve sensitivity ratio lower, the action reaction leads to the security of unit operation more slowly to be a great threat, probably because the increase of internal pressure causes the unit through-flow clearance to change, the slight problem of warping of cylinder body even.

(II) technical scheme

In order to realize the purpose of high sensitivity and fast reaction, the utility model provides a following technical scheme: an atmospheric safety valve comprises an upper valve body and a lower valve body, wherein an air inlet joint is fixedly arranged at the bottom of the lower valve body, an upper connecting plate is fixedly arranged at the bottom of the upper valve body, a lower connecting plate is fixedly arranged at the top of the lower valve body, a connecting bolt penetrating through the lower connecting plate and the upper connecting plate is movably arranged at the bottom of the lower connecting plate, a nut is movably arranged on the surface of the connecting bolt and positioned at the top of the upper connecting plate, a clamping ring is fixedly arranged on the inner wall of the lower valve body, a pneumatic membrane is movably arranged at the top of the clamping ring, a fixed pressing plate extending to the outer parts of the lower connecting plate and the upper connecting plate is movably arranged at the top of the fixed pressing plate, an upper sealing gasket is movably arranged at the bottom of the fixed pressing plate, a valve post is fixedly arranged at the top of the upper valve body, and a valve rod is, the bottom of the valve rod is fixedly provided with a spare valve core, the right side of the upper valve body is fixedly provided with an exhaust pipe, and the right side of the exhaust pipe is fixedly provided with an exhaust joint.

Preferably, the upper valve body and the lower valve body are made of stainless steel, the cross sections of the upper valve body and the lower valve body are circular, and the inner diameters of the upper valve body and the lower valve body are equal.

Preferably, the top of the upper valve body is provided with a through hole corresponding to the valve rod, and the right side of the upper valve body is provided with an exhaust hole corresponding to the exhaust pipe.

Preferably, upper junction plate, lower connecting plate are whole with upper valve body, lower valve body respectively, and upper junction plate, lower connecting plate are cylindrical, and six connecting holes that correspond with the connecting bolt have all been seted up to the equal equidistance in upper junction plate, the inside of lower connecting plate.

Preferably, the material of screens ring is the stainless steel, and the cross sectional shape of screens ring is trapezoidal, and the overlooking shape of screens ring is the ring shape, the material of fixed clamp plate is the aluminum alloy, and the shape of fixed clamp plate is for falling 'L' shape, and the quantity of fixed clamp plate is two, the material of upper seal pad, lower seal pad is rubber.

Preferably, the valve post is in threaded connection with the valve rod, a six-sided screw cover is fixedly mounted at the top of the valve rod, a spare valve core made of aluminum alloy is fixedly mounted at the bottom of the valve rod, a sealing ring made of rubber is fixedly mounted at the side edge of the spare valve core, and the diameter of the spare valve core and the thickness of the sealing ring are equal to the inner diameter of the upper valve body.

(III) advantageous effects

Compared with the prior art, the utility model provides an atmospheric relief valve possesses following beneficial effect:

the atmospheric safety valve is characterized in that a clamping ring is fixedly arranged on the inner wall of a lower valve body, a specially-made air pressure membrane is arranged on the clamping ring, then a fixed pressure plate is used for fixing the air pressure membrane on the clamping ring, the two fixed pressure plates are clamped by an upper connecting plate and a lower connecting plate and are fixed by a connecting bolt and a screw cap, an upper sealing gasket and a lower sealing gasket are matched between the upper connecting plate and the lower connecting plate to wrap the fixed pressure plates, firstly, the fixed pressure plates are protected to avoid deformation under the action of pressure, secondly, gaps between the upper connecting plate and the lower connecting plate are filled up to ensure the air tightness of the interiors of the upper valve body and the lower valve body, once the internal pressure of a machine body exceeds a limit value, the air pressure can burst the air pressure membrane, and then the air pressure can be discharged from an exhaust pipe, compared with the traditional mechanical atmospheric safety valve, the sensitivity is higher, the reaction speed, the machine stops, and the staff only need will connect the bolt to take out, with new atmospheric pressure membrane change damaged atmospheric pressure membrane can, it is fast to change, whether effect of reserve case lies in test atmospheric pressure membrane bearing capacity up to standard, in the test, twist and move the valve rod and make reserve case move down to the below of blast pipe, if test structure up to standard, then will twist and move the valve rod make reserve case shift up to the top of blast pipe can, so the utility model provides an atmospheric safety valve.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged schematic view of the utility model at A;

fig. 3 is a schematic front view of the present invention.

In the figure: the valve comprises an upper valve body 1, a lower valve body 2, an air inlet joint 21, an upper connecting plate 3, a lower connecting plate 4, a connecting bolt 5, a screw cap 6, a clamping ring 7, an air pressing film 8, a pressure fixing plate 9, an upper sealing gasket 10, a lower sealing gasket 11, a valve column 12, a valve rod 13, a spare valve core 14, an exhaust pipe 15 and an exhaust joint 16.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, an atmospheric safety valve includes an upper valve body 1, a lower valve body 2, the upper valve body 1 and the lower valve body 2 are made of stainless steel, the cross-sectional shapes of the upper valve body 1 and the lower valve body 2 are both circular, the inner diameters of the upper valve body 1 and the lower valve body 2 are equal, the bottom of the lower valve body 2 is fixedly provided with an air inlet joint 21, the bottom of the upper valve body 1 is fixedly provided with an upper connecting plate 3, the top of the lower valve body 2 is fixedly provided with a lower connecting plate 4, the bottom of the lower connecting plate 4 is movably provided with a connecting bolt 5 penetrating through the lower connecting plate 4 and the upper connecting plate 3, the upper connecting plate 3 and the lower connecting plate 4 are respectively integrated with the upper valve body 1 and the lower valve body 2, the upper connecting plate 3 and the lower connecting plate 4 are both cylindrical, the upper connecting plate 3 and the lower connecting plate 4 are provided with six connecting holes corresponding to the connecting bolt 5 at equal intervals inside, the connecting bolt 5 is positioned on the top of the upper connecting plate 3 and is movably provided with a nut 6, the upper connecting plate 7, the inner wall of the lower connecting plate 2 is fixedly provided with a plug 7, the exhaust pipe 7, the exhaust pipe is provided with a plug 13, the exhaust pipe 7, the exhaust pipe is provided with a plug 13, the exhaust pipe is provided with the exhaust pipe, the exhaust pipe.

In summary, the atmospheric safety valve has the advantages that the clamping ring 7 is fixedly installed on the inner wall of the lower valve body 2, the specially-made air pressure membrane 8 is placed on the clamping ring 7, the air pressure membrane 8 is fixed on the clamping ring 7 through the pressure fixing plates 9, the two pressure fixing plates 9 are clamped through the upper connecting plate 3 and the lower connecting plate 4 and are fixed through the connecting bolt 5 and the screw cap 6, the upper sealing gasket 10 and the lower sealing gasket 11 are matched between the upper connecting plate 3 and the lower connecting plate 4 to wrap the pressure fixing plates 9, firstly, the pressure fixing plates 9 are protected to avoid deformation under the action of pressure, secondly, gaps between the upper connecting plate 3 and the lower connecting plate 4 are filled through the elasticity of rubber, the air tightness inside the upper valve body 1 and the lower valve body 2 is ensured, once the pressure inside the machine body exceeds a limit value, the air pressure can break the air pressure membrane 8, and then the air is exhausted from the exhaust pipe 15 compared with the traditional mechanical atmospheric, sensitivity is higher, reaction rate is faster, simultaneously after air pressure membrane 8 is broken through, the machine stops, the staff only need take out connector bolt 5, change damaged air pressure membrane 8 with new air pressure membrane 8 can, change fastly, whether the effect of reserve case 14 lies in the 8 bearing capacity of test air pressure membrane up to standard, in the time of the test, twist valve rod 13 and make reserve case 14 move down to the below of blast pipe 15, if test structure is up to standard, then will twist valve rod 13 and make reserve case 14 shift up the top of blast pipe 15 can, so the utility model provides an atmosphere formula relief valve.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an atmospheric safety valve, includes valve body (1), lower valve body (2), its characterized in that: the bottom fixed mounting of lower valve body (2) has air-in connection (21), the bottom fixed mounting of going up valve body (1) has upper junction plate (3), the top fixed mounting of lower valve body (2) has lower connecting plate (4), the bottom movable mounting of lower connecting plate (4) has connecting bolt (5) that runs through lower connecting plate (4) and upper junction plate (3), the surface of connecting bolt (5) and the top movable mounting who is located upper junction plate (3) have nut (6), fixed mounting has screens ring (7) on the inner wall of lower valve body (2), the top movable mounting of screens ring (7) has air pressure membrane (8), the top movable mounting of air pressure membrane (8) has fixed pressing plate (9) that extends to lower connecting plate (4) and upper junction plate (3) outside, the top movable mounting of fixed pressing plate (9) has upper seal pad (10), the bottom movable mounting of stationary platen (9) has lower sealing pad (11), the top fixed mounting who goes up valve body (1) has valve column (12), the inside movable mounting of valve column (12) has valve rod (13), the bottom fixed mounting of valve rod (13) has reserve case (14), the right side fixed mounting who goes up valve body (1) has blast pipe (15), the right side fixed mounting of blast pipe (15) has exhaust joint (16).

2. Atmospheric safety valve according to claim 1, characterized in that: the upper valve body (1) and the lower valve body (2) are made of stainless steel, the cross sections of the upper valve body (1) and the lower valve body (2) are circular, and the inner diameters of the upper valve body (1) and the lower valve body (2) are equal.

3. Atmospheric safety valve according to claim 1, characterized in that: the top of the upper valve body (1) is provided with a through hole corresponding to the valve rod (13), and the right side of the upper valve body (1) is provided with an exhaust hole corresponding to the exhaust pipe (15).

4. Atmospheric safety valve according to claim 1, characterized in that: the upper connecting plate (3) and the lower connecting plate (4) are integrated with the upper valve body (1) and the lower valve body (2) respectively, the upper connecting plate (3) and the lower connecting plate (4) are cylindrical, and six connecting holes corresponding to the connecting bolts (5) are formed in the upper connecting plate (3) and the lower connecting plate (4) at equal intervals.

5. An atmospheric safety valve according to claim 1, characterized in that the material of the clamping ring (7) is stainless steel, the cross-sectional shape of the clamping ring (7) is trapezoidal, the top view of the clamping ring (7) is circular, the material of the fixed pressure plate (9) is aluminum alloy, the shape of the fixed pressure plate (9) is inverted 'L', the number of the fixed pressure plates (9) is two, and the materials of the upper sealing gasket (10) and the lower sealing gasket (11) are rubber.

6. Atmospheric safety valve according to claim 1, characterized in that: the valve rod (12) is in threaded connection with the valve rod (13), the top of the valve rod (13) is fixedly provided with a six-surface-shaped screw cap, the bottom of the valve rod (13) is fixedly provided with a standby valve core (14) made of an aluminum alloy material, the side edge of the standby valve core (14) is fixedly provided with a sealing ring made of a rubber material, and the diameter of the standby valve core (14) plus the thickness of the sealing ring is equal to the inner diameter of the upper valve body (1).