CN215293670U

CN215293670U - Pressure self-tightening sealing upper-mounted ball valve

Info

Publication number: CN215293670U
Application number: CN202120218419.XU
Authority: CN
Inventors: 罗起飞; 卓银坚
Original assignee: Shanghai Nanjiang Fluid Technology Co ltd
Current assignee: Shanghai Nanjiang Fluid Technology Co ltd
Priority date: 2021-01-27
Filing date: 2021-01-27
Publication date: 2021-12-24
Anticipated expiration: 2031-01-27

Abstract

The utility model relates to a pressure self-tightening seals facial make-up ball valve, this ball valve adopt top mounted formula, welding end structure (also can use flange joint), and it comprises main spare parts such as valve body, disk seat, valve ball, valve shaft, valve gap, wedge ring, four ring-opening, metallic seal ring, gland, seal receptacle, filler, lip formula sealing washer. The valve adopts a top-mounted valve cover design, the valve internals are all mounted in the valve cavity, and when the valve is connected with a pipeline or welded, the online replacement of the sealing element can be realized without dismounting the valve body, thereby greatly saving the maintenance time and cost. The multiple sealing structure formed by the metal sealing ring, the O-shaped ring and the lip type sealing ring is adopted between the valve cover and the valve body, and the metal sealing ring and the valve cover are matched in a conical surface mode, so that the self-tightening sealing function can be realized, the sealing performance of the valve under the high-pressure working condition is greatly improved, and the service life of the valve is prolonged.

Description

Pressure self-tightening sealing upper-mounted ball valve

Technical Field

The utility model relates to a ball valve technical field specifically is a pressure self-tightening seals facial make-up ball valve.

Background

The traditional ball valve body and the valve cover both adopt a bolt connection structure, and the sealing between the valve body and the valve cover is realized mainly by pre-tightening a gasket by bolts, as shown in figure 1. Under the action of medium pressure, the bolt and the valve cover can deform to cause insufficient gasket specific pressure, so that leakage occurs, and particularly under the high-pressure working condition, the structure cannot meet the use requirement. Meanwhile, the diameters of the flanges in the valve body and the valve cover are designed to be larger and thicker, so that the manufacturing cost is high.

The utility model discloses an it is exactly not enough among the existing ball valve technique to overcome, adopts neotype valve structure, has overcome in the traditional ball valve that the flange easily leaks and can not adapt to the defect of high-pressure operating mode. The utility model discloses can improve valve sealing performance, increase the life of valve, reduce the maintenance cost, application range is wider, can be used to special operating mode such as high temperature, low temperature, especially under heavy-calibre, high-pressure operating mode, the utility model has the advantages of it is obvious.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides a pressure is from tight seal facial make-up ball valve possesses this ball valve and adopts top installation formula, welding end structure (also can be with flange joint), and it comprises main spare parts such as valve body, disk seat, valve ball, valve shaft, valve gap, wedge ring, four ring-opening, metal seal ring, gland, seal receptacle, filler, lip formula sealing washer. The valve adopts a top-mounted valve cover design, the valve internals are all mounted in the valve cavity, and when the valve is connected with a pipeline or welded, the online replacement of the sealing element can be realized without dismounting the valve body, thereby greatly saving the maintenance time and cost. A multiple sealing structure consisting of a metal sealing ring, an O-shaped ring and a lip type sealing ring is adopted between the valve cover and the valve body, and the metal sealing ring and the valve cover are matched in a conical surface mode. Under the action of the four-open ring and the wedge ring, the axial displacement of the metal sealing ring is restrained, and when the valve cover is under the action of internal pressure, the valve cover is axially displaced and generates strong wedging force, so that the valve cover and the metal sealing ring as well as the metal sealing ring and the valve body form tight fit, an external leakage channel of a medium is blocked, and the sealing effect is better if the internal pressure is higher and the formed sealing specific pressure is higher. Therefore, the structure can realize the pressure self-tightening sealing function, greatly improve the sealing performance of the valve under the high-pressure working condition and prolong the service life of the valve.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: a pressure self-tightening seal upper-mounted ball valve comprises a valve shaft, four open rings, a wedge-shaped ring, a metal sealing ring, an O-shaped ring, a lip type sealing ring, a valve cover, a valve ball, a valve seat, a valve body, a bolt and a gasket, a valve shaft is arranged in the middle of the top of the valve body, a valve cover is arranged on the top of the valve body, four open rings are arranged between the valve body and the valve cover, a wedge-shaped ring is arranged on the left side of the four-open ring, a bolt is arranged on the top of the wedge-shaped ring, a metal sealing ring is arranged between the valve cover and the valve body, the metal sealing ring is in conical surface fit with the valve cover, an O-shaped ring is arranged at the bottom of the metal sealing ring, the bottom of the O-shaped ring is provided with a lip-type sealing ring, the bottom of the valve body is provided with a valve seat, a valve ball is arranged in the valve body, the valve ball is connected with the valve shaft, and the wedge-shaped ring and the four open rings respectively have a wedge-shaped matching plane.

Preferably, four open rings are arranged between the valve body and the valve cover and are connected with the wedge-shaped ring through bolts to form a whole.

Preferably, multiple seals such as a packing, an O-shaped ring and a lip type sealing ring are arranged at the valve cover and the valve shaft.

(III) advantageous effects

Compared with the prior art, the utility model provides a pressure self-tightening seals facial make-up ball valve possesses following beneficial effect:

the utility model discloses a valve pocket pressure upwards promotes the valve gap, thereby realize under wedge metal seal circle's effect and the valve body between the self-tightening sealed, avoided ordinary ball valve to adopt bolted connection valve gap flange yielding to lead to the defect of outer hourglass when high pressure, the utility model discloses improve the sealing performance of valve greatly, and well flange diameter ratio ordinary bolted connection valve gap size is little, so can alleviate weight reduction manufacturing cost.

The utility model discloses be equipped with packing box and O type circle, the multiple seal structure of lip formula sealing washer at the valve gap top, ensure the sealing performance of valve shaft under abominable operating mode.

A plurality of disc springs are arranged between the packing gland and the screw, so that the phenomenon that the valve shaft is locked due to the expansion of material lines under the high-temperature working condition of the lower valve shaft is effectively avoided

Compared with the traditional ball valve technology, the utility model overcomes traditional ball valve easily leaks and change technical defect such as sealing member is more difficult online under high pressure (more than or equal to 15MPa) operating mode lower body cover junction, makes the valve homoenergetic reliable operation for a long time under various harsh operating modes, is particularly useful for heavy-calibre, high-pressure pipeline operating mode, and market prospect is wide

Drawings

FIG. 1 is a schematic view of a common top-loading ball valve

Fig. 2 is a schematic view of the structure of the present invention

FIG. 3 shows the structure of the sealing ring cooperating with the valve body and the valve cover

FIG. 4 is a view showing a structure of a metal seal ring

FIG. 5 is a schematic view of the wedge ring cooperating with the valve cover and the four open rings;

in the figure: the valve comprises a valve shaft 11, a four-open ring 12, a wedge-shaped ring 13, a metal sealing ring 14, an O-shaped ring 15, a lip type sealing ring 16, a valve cover 17, a valve ball 18, a valve seat 19, a valve body 20, a bolt 21 and a gasket 22.

Detailed Description

In order to make the technical solution of the present invention better understood, the present invention is described in detail below with reference to the accompanying drawings, and the description of the present invention is only exemplary and explanatory, and should not be construed as limiting the scope of the present invention.

Referring to fig. 1-3, a pressure self-tightening sealing upper-mounted ball valve includes a valve shaft 11, a four-open ring 12, a wedge-shaped ring 13, a metal sealing ring 14, an O-ring 15, a lip-type sealing ring 16, a valve cover 17, a valve ball 18, a valve seat 19, a valve body 20, a bolt 21, and a gasket 22, wherein the valve shaft 11 is disposed in the middle of the top of the valve body 20, the valve cover 17 is disposed on the top of the valve body 20, the four-open ring 12 is disposed between the valve body 20 and the valve cover 17, the wedge-shaped ring 13 is disposed on the left side of the four-open ring 12, the bolt 21 is disposed on the top of the wedge-shaped ring 13, the metal sealing ring 14 is disposed between the valve cover 17 and the valve body 20, the metal sealing ring 14 and the valve cover 17 form a conical surface fit, the O-ring 15 is disposed on the bottom of the metal sealing ring 14, the lip-type sealing ring 16 is disposed on the bottom of the O-ring 15, the valve body 20 is disposed on the valve seat 19, a valve ball 18 is arranged in the valve body 20, the valve ball 18 is connected with the valve shaft 11, and the wedge-shaped ring 13 and the four open rings 12 are respectively provided with a wedge-shaped matching plane;

four open rings are arranged between the valve body 20 and the valve cover 17 and are connected with the wedge-shaped ring 13 into a whole through bolts 21;

the valve cover 17 and the valve shaft 11 are provided with multiple seals such as a filler, an O-shaped ring 15 and a lip type sealing ring 16.

As shown in the figure, a spherical sealing structure is adopted between the valve ball and the sealing seat, and sealing is realized under the action of medium pressure and pre-tightening force. The valve cover and the metal sealing ring are respectively processed with a conical surface, the angle of the conical surface is set as alpha, the surfaces of the two conical surfaces are ground, the hardness of the metal sealing ring is not more than 200HB, and the surfaces are plated with silver so as to improve the sealing performance. During assembly, the metal sealing ring is arranged above the valve cover, so that the two conical surfaces are ensured to be contacted with each other. And (3) mounting the four open rings in the groove of the valve body, and then assembling the wedge-shaped ring, wherein the wedge-shaped ring is contacted and matched with the two conical surfaces of the four open rings. The valve cover is connected with the wedge-shaped ring through bolts, and after the parts are assembled, the bolts are screwed down to enable the metal sealing ring to establish initial sealing with the valve body and the valve cover. When the valve cover bolt is pre-tightened, the valve cover presses the metal sealing ring to generate a wedging force F, the pre-tightening force F can generate a component force Fm in the horizontal direction under the action of the inclined surface, the conical surface of the metal sealing ring can radially expand under the action of the component force Fm to ensure that the metal sealing ring and the valve body are tightly attached to each other, and finally, enough sealing specific pressure is formed between the two sealing surfaces to realize reliable sealing.

When the valve is used for a long time and is led to sealed when pressing down because of sealed face wearing and tearing, only need loosen support bolt, pull down the support and take out metal seal circle and can realize changing the sealing member on line, then tighten up valve gap bolt again and can realize online self-tightening sealing, this process need not to pull down whole valve from the pipeline, and the installation is maintained very conveniently, has overcome the easy deformation of flange in the ordinary ball valve and has leaded to the easy defect of leaking of high pressure operating mode, the utility model discloses the life cycle and the sealing reliability of valve have been improved greatly, especially under high temperature operating mode the utility model has the advantages that ordinary ball valve can't be compared, and sealing performance is good, low in manufacturing cost, the switch is light

When the device is used, after the device is installed, the bolts are screwed down to enable the metal sealing ring to establish initial sealing with the valve body and the valve cover, the metal sealing ring is ensured to be tightly attached to the valve body, and finally sufficient sealing specific pressure is formed between two sealing surfaces to realize reliable sealing.

The standard parts used in this application document all can be purchased from the market, and can be customized according to the record of description and drawings, the concrete connection mode of each part all adopts conventional means such as mature bolt, rivet, welding among the prior art, machinery, part and equipment all adopt conventional model among the prior art, the control mode is automatic control through the controller, the control circuit of controller can realize through technical staff's simple programming in this field, belong to the common general knowledge in this field, and the utility model discloses mainly be used for protecting mechanical device, so the utility model discloses no longer explain control mode and circuit connection in detail, and the peripheral controller that mentions in the description can play the control role for the electrical components that this article mention, and this peripheral controller is conventional known equipment.

It should be noted that, in this document, 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.

The principles and embodiments of the present invention have been explained herein using specific examples, which are presented only to assist in understanding the methods and their core concepts. It should be noted that there are infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that various improvements, decorations or changes can be made without departing from the principles of the present invention, and the technical features can be combined in a suitable manner; the application of these modifications, variations or combinations, or the application of the concepts and solutions of the present invention in other contexts without modification, is not intended to be considered as a limitation of the present invention.

Claims

1. The utility model provides a pressure self-tightening seal upper assembling ball valve, includes valve shaft (11), four ring opening (12), wedge ring (13), metal seal ring (14), O type circle (15), lip formula sealing washer (16), valve gap (17), valve ball (18), disk seat (19), valve body (20), bolt (21), gasket (22), be provided with valve shaft (11) in the middle of the top of valve body (20), the top of valve body (20) is provided with valve gap (17), be provided with four ring opening (12) between valve body (20) and valve gap (17), the left side of four ring opening (12) is provided with wedge ring (13), the top of wedge ring (13) is provided with bolt (21), be provided with metal seal ring (14) between valve gap (17) and valve body (20), metal seal ring (14) and valve gap (17) form the conical surface cooperation, the bottom of metal seal ring (14) is provided with O type circle (15), the bottom of O type circle (15) is provided with lip formula sealing washer (16), the bottom of valve body (20) is provided with disk seat (19), be provided with valve ball (18) in valve body (20), valve ball (18) link to each other with valve shaft (11), wedge ring (13) and four ring opening (12) have a wedge cooperation plane respectively.

2. A pressure energized seal installed ball valve as defined in claim 1, wherein: four open rings are arranged between the valve body (20) and the valve cover (17) and are connected with the wedge-shaped ring (13) through bolts (21) to form a whole.

3. A pressure energized seal installed ball valve as defined in claim 1, wherein: multiple seals such as a packing, an O-shaped ring (15), a lip type sealing ring (16) and the like are arranged at the positions of the valve cover (17) and the valve shaft (11).