CN216478957U

CN216478957U - Double-sealing vacuum breaking valve

Info

Publication number: CN216478957U
Application number: CN202123302873.2U
Authority: CN
Inventors: 王展波; 牛秋菊; 王翠玲
Original assignee: Tianjin Tanggu Twt Valve Co ltd
Current assignee: Tianjin Tanggu Twt Valve Co ltd
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2022-05-10
Anticipated expiration: 2031-12-24

Abstract

The utility model provides a double seal vacuum break valve relates to vacuum break valve technical field. The valve plate passes through an inner cavity of the valve seat and extends into the sleeve, and is connected with one end of the tension spring, the protective net and the middle cover are sequentially arranged above the valve seat, the middle cover is connected with the sleeve, the negative pressure plate is arranged above the tension spring and is in sliding connection with the inner side wall of the sleeve, the bottom of the negative pressure plate is connected with the other end of the tension spring, one end of the adjusting rod penetrates through the top of the negative pressure plate, and the other end of the adjusting rod extends upwards through the top cover; the joint of the valve seat and the valve plate is provided with a groove, a sealing gasket is arranged in the groove, and the valve seat and the sealing gasket form a double-sealing structure. Through newly adding sealed the pad, constitute double seal structure, when the sealed pad of rubber became invalid, the disk seat can also play sealed effect, is unlikely to sealed the inefficacy and takes place to leak.

Description

Double-sealing vacuum breaking valve

Technical Field

The utility model relates to a vacuum break valve technical field particularly, relates to a double seal vacuum break valve.

Background

The vacuum breaker valve can be widely applied to various pipeline systems which are easy to generate vacuum, such as fire fighting, swimming pools, green land sprinkling irrigation, water supply and drainage, docks, power plants, metallurgy, shipbuilding and other fields, air is timely sucked to protect the pipeline systems when negative pressure is formed in the pipeline, and when the pipeline or a container generates negative pressure or vacuum gradually rises due to running or stopping of the pipeline system, the vacuum breaker valve can be automatically opened to break the vacuum effect, so that the pipeline and other equipment cannot be shriveled or dented, and the like, and the safety of the equipment is protected. The vacuum breaking valve can be divided into a pressure balance type vacuum breaking valve, an unbalanced type vacuum breaking valve, a pneumatic mechanical type vacuum breaking valve, a self-operated plate type vacuum breaking valve and a special vacuum breaking valve according to the opening and closing principle. The self-operated plate type vacuum breaking valve is manually adjusted according to different pipeline pressures, when negative pressure occurs to a pipeline, the valve is opened to suck air to break the vacuum degree, so that the pipeline and other equipment are not shriveled or dented, and the like, so that the safety of the equipment is protected, the self-operated plate type vacuum breaking valve is suitable for higher pressure, can be used for various types of connection types, and does not need adapters and accessories.

The existing self-operated plate type vacuum breaking valve only adopts metal valve seat sealing, and the sealing is not tight and has poor sealing performance and easy leakage problem because a gap is formed between metal and metal.

Therefore, in view of the deficiencies of the prior art, it would be desirable to provide a double seal vacuum break valve having a simple structure that addresses the problems set forth in the background above.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a double sealing vacuum break valve, it can be to the weak point among the prior art, proposes the solution, has rubber seal and metal seal double seal structure, can improve sealing performance, prevents characteristics such as leakage.

The embodiment of the utility model is realized like this:

a double-seal vacuum breaker valve comprises a valve seat, a valve plate, a protective net, a middle cover, a tension spring, a negative pressure plate, a sleeve, an adjusting rod and a top cover, wherein the sleeve is arranged between the valve seat and the top cover, the valve plate penetrates through an inner cavity of the valve seat to extend into the sleeve and is connected with one end of the tension spring, the protective net and the middle cover are sequentially arranged above the valve seat, the middle cover is connected with the sleeve, the negative pressure plate is arranged above the tension spring and is in sliding connection with the inner side wall of the sleeve, the bottom of the negative pressure plate is connected with the other end of the tension spring, one end of the adjusting rod penetrates through the top of the negative pressure plate, and the other end of the adjusting rod upwards extends through the top cover; the valve seat with the junction of valve plate is equipped with the recess, be equipped with sealed the pad in the recess, the valve seat with sealed pad constitutes double seal structure.

In some embodiments of the present invention, the sealing gasket is made of rubber, and the sealing gasket is vulcanized in the groove of the valve seat.

In some embodiments of the utility model, the valve plate with be equipped with the axle sleeve between the clearance of well lid, the axle sleeve is the T style of calligraphy, and its horizontal end is fixed in through hexagon head bolt the top of well lid, the tip of well lid pass through hexagon head bolt head with muffjoint.

In some embodiments of the present invention, the inner side of the shaft sleeve is provided with a plurality of slots.

In some embodiments of the present invention, a horizontal hexagon head bolt is arranged on one side of the negative pressure plate, and the hexagon head bolt passes through the side wall of the sleeve and follows the negative pressure plate moves up and down.

In some embodiments of the present invention, the sleeve is located on the outer side wall of the negative pressure plate moving range, and a plurality of vacuum degree calibration lines are arranged on the outer side wall.

In some embodiments of the present invention, the protective net is provided with a supporting rib inside.

In some embodiments of the present invention, the adjusting rod is connected to the negative pressure plate and the top cover through a hexagon nut.

In some embodiments of the present invention, the side wall of the top cap is connected to the sleeve by a socket head cap set screw.

In some embodiments of the present invention, the connection portion of the hexagon head bolt is provided with a spring washer.

Compared with the prior art, the embodiment of the utility model has following advantage or beneficial effect at least:

the utility model has simple structure, has double sealing structure of rubber sealing and metal sealing, can improve the sealing performance and prevent leakage; the valve comprises a valve seat, a valve plate, a protective net, a middle cover, a tension spring, a negative pressure plate, a sleeve, an adjusting rod and a top cover, wherein the sleeve is arranged between the valve seat and the top cover; the valve seat with the junction of valve plate is equipped with the recess, be equipped with sealed the pad in the recess, the valve seat with sealed pad constitutes double seal structure. Through the newly-increased sealed pad of junction of disk seat and valve plate makes seal structure become disk seat seal and the sealed double seal structure who fills up the sealing by solitary disk seat seal, avoids the sealed not tight between metal and the metal, takes place to leak the scheduling problem, the utility model discloses simple structure has sealed tight, technical effect such as sealing performance is excellent.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic view of the overall structure of a double seal vacuum break valve according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

FIG. 3 is an enlarged view of a portion of the structure shown at B in FIG. 1;

fig. 4 is a partial enlarged view of the point C in fig. 1 according to the present invention.

Reference numerals: 1. a valve seat; 2. a valve plate; 3. a protective net; 4. a middle cover; 5. a tension spring; 6. a negative pressure plate; 7. a sleeve; 8. an adjusting lever; 9. a top cover; 10. a gasket; 11. a shaft sleeve; 12. a hexagonal bolt head; 13. grooving; 14. calibrating a line by using vacuum degree; 15. supporting ribs; 16. a hexagonal head nut; 17. and a hexagon socket set screw.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, the description is only for convenience of description of the present invention and simplification, but the indication or suggestion that the device or element to be referred must have a specific position, be constructed and operated in a specific position, and therefore, the present invention should not be construed as being limited thereto. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not require that the components be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present invention, "a plurality" means at least 2.

In the description of the embodiments of the present invention, it should be further noted that unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Examples

Referring to fig. 1-4, fig. 1 is a schematic view of an overall structure of a double-sealing vacuum break valve according to an embodiment of the present invention; FIG. 2 is an enlarged view of a portion A of FIG. 1; FIG. 3 is an enlarged view of a portion of the structure shown at B in FIG. 1; fig. 4 is an enlarged view of a portion C of fig. 1 according to the present invention;

in an embodiment of the present application, a double seal vacuum break valve specifically includes: the valve seat comprises a valve seat 1, a valve plate 2, a protective screen 3, a middle cover 4, a tension spring 5, a negative pressure plate 6, a sleeve 7, an adjusting rod 8 and a top cover 9, wherein the sleeve 7 is arranged between the valve seat 1 and the top cover 9, the valve plate 2 penetrates through an inner cavity of the valve seat 1 to extend into the sleeve 7 and is connected with one end of the tension spring 5, the protective screen 3 and the middle cover 4 are sequentially arranged above the valve seat 1, the middle cover 4 is connected with the sleeve 7, the negative pressure plate 6 is arranged above the tension spring 5 and is in sliding connection with the inner side wall of the sleeve 7, the bottom of the negative pressure plate 6 is connected with the other end of the tension spring 5, one end of the adjusting rod 8 penetrates through the top of the negative pressure plate 6, and the other end of the adjusting rod upwards extends through the top cover 9; the joint of the valve seat 1 and the valve plate 2 is provided with a groove, a sealing gasket 10 is arranged in the groove, and the valve seat 1 and the sealing gasket 10 form a double-sealing structure.

The utility model has simple structure, has double sealing structure of rubber sealing and metal sealing, can improve the sealing performance and prevent leakage; through a valve seat 1, a valve plate 2, a protective net 3, a middle cover 4, a tension spring 5, a negative pressure plate 6, a sleeve 7, an adjusting rod 8 and a top cover 9, the sleeve 7 is arranged between the valve seat 1 and the top cover 9, the valve plate 2 penetrates through an inner cavity of the valve seat 1 to extend into the sleeve 7 and is connected with one end of the tension spring 5, the protective net 3 and the middle cover 4 are sequentially arranged above the valve seat 1, the middle cover 4 is connected with the sleeve 7, the negative pressure plate 6 is arranged above the tension spring 5 and is in sliding connection with the inner side wall of the sleeve 7, the bottom of the negative pressure plate 6 is connected with the other end of the tension spring 5, one end of the adjusting rod 8 penetrates through the top of the negative pressure plate 6, and the other end of the adjusting rod upwards extends through the top cover 9; the joint of the valve seat 1 and the valve plate 2 is provided with a groove, a sealing gasket 10 is arranged in the groove, and the valve seat 1 and the sealing gasket 10 form a double-sealing structure. Through newly-increased sealed pad 10 of disk seat 1 and valve plate 2 junction makes seal structure become the sealed double seal structure who seals up 10 with sealed pad of disk seat 1 by solitary disk seat 1 is sealed, avoids the not tight of sealing between metal and the metal, takes place to leak the scheduling problem, the utility model discloses simple structure has technical effect such as sealed tight, sealing performance is excellent.

Hereinafter, a double sealing vacuum break valve in the present exemplary embodiment will be further described.

In one embodiment of this embodiment, the vacuum breaker valve mainly includes a valve seat 1, a valve plate 2, a protective screen 3, a middle cover 4, a tension spring 5, a negative pressure plate 6, a sleeve 7, an adjusting rod 8 and a top cover 9, the sleeve 7 is disposed between the valve seat 1 and the top cover 9, a vacuum chamber is disposed inside the sleeve 7, the valve plate 2 passes through the internal chamber of the valve seat 1 and extends into the sleeve 7 and is connected with one end of the tension spring 5, the protective screen 3 and the middle cover 4 are sequentially disposed above the valve seat 1, the middle cover 4 is connected with the sleeve 7, the negative pressure plate 6 is disposed above the tension spring 5 and is slidably connected with the inner side wall of the sleeve 7, the bottom of the negative pressure plate 6 is connected with the other end of the tension spring 5, one end of the adjusting rod 8 is inserted into the top of the negative pressure plate 6, the other end extends upwards through said top cover 9.

In a concrete realization, when phenomenons such as flat, concave splitting appear in the pipeline, when the negative pressure appeared in inside promptly, the outside atmospheric pressure of protection network 3 entered into disk seat 1 inside, promoted valve plate 2 and opened, and valve plate 2 downstream introduces the pipeline with external atmosphere in, destroys the inside vacuum of pipeline, through adjusting lever 8, drives reciprocating of negative pressure board 6 to adjust the vacuum in the pipeline.

In one embodiment of this embodiment, the protective net 3 is provided with support ribs 15 inside.

The support ribs 15 are used to support the protection net 3 and stabilize the protection net 3 above the valve seat 1.

In one embodiment of this embodiment, a groove is provided at the joint of the valve seat 1 and the valve plate 2, a sealing gasket 10 is provided in the groove, and the valve seat 1 and the sealing gasket 10 form a double sealing structure.

It should be noted that, the original sealing structure adopts the sealing between the valve seat 1 and the valve plate 2 alone, that is, the sealing between metal and metal, which may result in the occurrence of inaccurate sealing and easy leakage, the sealing gasket 10 is made of rubber material, the sealing gasket 10 is vulcanized in the groove of the valve seat 1, so that the sealing gasket 10 and the valve seat 1 form a double sealing structure, the sealing between the rubber sealing gasket 10 and the valve plate 2 is tighter, the sealing performance is better, and when the rubber sealing gasket 10 fails, the following valve seat 1 can also play a role in sealing, and the leakage is not caused by the sealing failure.

In one embodiment of this embodiment, a hexagonal head bolt is inserted into one side of the negative pressure plate 6, and the hexagonal head bolt passes through the side wall of the sleeve 7 and moves up and down with the negative pressure plate 6.

It should be noted that, a hexagon head bolt is arranged on one side of the negative pressure plate 6 to limit the left and right rotation of the negative pressure plate 6, when the negative pressure plate 6 moves up and down under the action of the adjusting rod 8, if there is no limit action of the hexagon head bolt, the hexagon head bolt is easy to rotate in the sleeve 7 to affect the stability of the negative pressure plate 6, thereby affecting the adjustment of the vacuum degree in the tube, therefore, the hexagon head bolt is inserted into one side of the negative pressure plate 6, and the other end of the hexagon head bolt penetrates through the side wall of the sleeve 7 to be arranged outside, and only can move up and down along with the negative pressure plate 6. And the clearance between negative pressure plate 6 and sleeve 7 can be adjusted through the hexagon head bolt, and the negative pressure plate 6 is prevented from shaking when adjusted.

In one embodiment of this embodiment, the sleeve 7 is provided with a plurality of vacuum degree calibration lines 14 on the outer side wall of the negative pressure plate 6 in the moving range.

It should be noted that, the adjusting rod 8 drives the negative pressure plate 6 to move up and down, and in the process of adjusting the vacuum degree in the pipeline, the proper vacuum degree cannot be adjusted by manual adjustment, and the pipeline cannot be restored to a normal state even if the vacuum degree is too high or too low, which may cause phenomena such as cracking or collapsing; through set up vacuum calibration line 14 on sleeve 7 lateral wall, when wanting to inspect whether flexible negative pressure plate 6, need not dismantle the upper cover, just can observe through the calibration groove, specifically, when adjusting negative pressure plate 6 from top to bottom, the accessible is observed and is located the position of vacuum calibration line 14 with the hexagon head bolt that negative pressure plate 6 is connected, confirm the vacuum of regulation, adjust the 14 positions of required vacuum calibration line through adjusting lever 8 with the hexagon head bolt according to the demand, wherein, vacuum calibration line 14 is formulated according to actual demand, can formulate a plurality of vacuum calibration lines 14, its numerical value size is confirmed according to the size of vacuum destruction valve or the actual size of tension spring 5.

In one embodiment of this embodiment, a shaft sleeve 11 is disposed between the gap between the valve plate 2 and the middle cap 4, the shaft sleeve 11 is T-shaped, the horizontal end of the shaft sleeve 11 is fixed to the top of the middle cap 4 through a hexagon bolt, and the end of the middle cap 4 is connected to the sleeve 7 through a hexagon bolt head 12.

Further, a plurality of slots 13 are opened on the inner side of the boss 11.

It should be noted that the shaft sleeve 11 is sleeved outside the valve plate 2, and the groove 13 is formed in the inner hole of the shaft sleeve 11, so that friction between the shaft sleeve 11 and the valve plate 2 is reduced, the valve plate 2 can move vertically more accurately, the accurate sealing contact position is ensured, and the problem of improper matching of a sealing pair of the valve plate 2 is solved.

In one embodiment of this embodiment, the adjusting rod 8 is connected to the negative pressure plate 6 and the top cover 9 through a hexagon nut 16, the sleeve 7 is connected to the middle cover 4 and the protection net 3 through a hexagon bolt, the side wall of the top cover 9 is connected to the sleeve 7 through an inner hexagon set screw 17, and spring washers are disposed at the joints of the hexagon bolts. The phenomenon that the structure takes place not hard up after welding in the past is avoided, and the mode that adopts bolted connection is more firm to convenient and fast more when the maintenance is changed, and all set up spring washer in the junction, when increasing sealing performance, protection architecture is difficult to damage, prolongs the life of structure.

The utility model has the advantages that:

by changing the sealing form, a sealing gasket 10 structure is added on the valve seat 1 to form a double sealing structure, so that the sealing performance between the valve plate 2 and the valve seat 1 is more excellent.

Through increasing axle sleeve 11 on 2 upper portions of valve plate, fluting 13 on 11 holes of axle sleeve reduces the friction between axle sleeve 11 and the valve plate 2, makes the perpendicular action of valve plate 2 more accurate, guarantees that sealed contact position is accurate, has solved the problem that the sealed vice cooperation of valve plate 2 is not normal.

Through increasing the negative pressure board 6 calibration function, open vacuum calibration line 14 on spring protective sleeve 7, adjust the clearance between negative pressure board 6 and the sleeve 7 with the bolt, avoid appearing rocking when adjusting negative pressure board 6, want to inspect whether negative pressure board 6 is nimble simultaneously, need not dismantle the upper cover, just can observe, adjust the vacuum through calibration line.

Through changing the connection structure and the structure of the vacuum breaker valve, the appearance design of the traditional structure is optimized, welding is reduced, assembly and processing production cost is reduced, and working efficiency is improved.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-seal vacuum breaker valve is characterized by comprising a valve seat, a valve plate, a protective net, a middle cover, a tension spring, a negative pressure plate, a sleeve, an adjusting rod and a top cover, wherein the sleeve is arranged between the valve seat and the top cover; the valve seat with the junction of valve plate is equipped with the recess, be equipped with sealed the pad in the recess, the valve seat with sealed pad constitutes double seal structure.

2. The double seal vacuum break valve of claim 1, wherein said gasket is made of rubber and is vulcanized into a groove of said valve seat.

3. The double-seal vacuum break valve according to claim 1, wherein a bushing is provided between the gap between the valve plate and the middle cap, the bushing is T-shaped, the horizontal end of the bushing is fixed to the top of the middle cap by a hexagon bolt, and the end of the middle cap is connected to the sleeve by a hexagon bolt head.

4. The double seal vacuum break valve of claim 3, wherein said bushing has a plurality of slots formed in an inner side thereof.

5. The double seal vacuum break valve of claim 4, wherein a lateral hex head bolt is threaded through one side of the negative pressure plate, the hex head bolt passing through the side wall of the sleeve and moving up and down with the negative pressure plate.

6. The double seal vacuum break valve according to claim 1, wherein the outer side wall of said sleeve in the moving range of said negative pressure plate is provided with a plurality of vacuum calibration lines.

7. The double seal vacuum break valve according to claim 1, wherein a support rib is provided inside the protection net.

8. The double seal vacuum break valve according to claim 1, wherein said adjusting rod is connected with said suction plate and said top cover, respectively, by a hex head nut.

9. The double seal vacuum break valve of claim 1, wherein the side wall of the top cap and the sleeve are connected by a socket head cap set screw.

10. The double seal vacuum break valve of claim 5, wherein the hex head bolt connections are each provided with a spring washer.