CN215568071U

CN215568071U - Elastic structure applied to dome valve and double-seal dome valve

Info

Publication number: CN215568071U
Application number: CN202120079286.2U
Authority: CN
Inventors: 俞爱华; 俞杰
Original assignee: Jiangsu Gen De Power Equipment Co ltd
Current assignee: Jiangsu Gen De Power Equipment Co ltd
Priority date: 2021-01-13
Filing date: 2021-01-13
Publication date: 2022-01-18
Anticipated expiration: 2031-01-13

Abstract

The utility model discloses a double-seal dome valve which comprises an elastic structure and a piston air chamber, wherein the elastic structure comprises a connecting piece, a ball valve and a ball valve, wherein the connecting piece is used for connecting a spherical center bracket and the ball valve; the elastic piece is sleeved on the connecting piece and limited in the spherical center support; the ball valve moves along the axial direction, and the movement range depends on the lengths of the connecting piece and the elastic piece; the piston air chamber comprises a pneumatic connecting structure and a sealing structure, wherein the pneumatic connecting structure comprises a valve body and a connecting shaft, and the sealing structure is connected with the valve body. According to the utility model, through the design of adding the elastic structure, the dome valve can be freely opened and is not easy to jam, and after the valve is closed, a linear seal is formed between the ball valve and the piston, so that no material enters, and zero leakage is achieved.

Description

Elastic structure applied to dome valve and double-seal dome valve

Technical Field

The utility model relates to the technical field of valve bodies, in particular to an elastic structure applied to a dome valve and a double-seal dome valve.

Background

The common ball valve is sealed mainly by means of the pretightening force or the fluid pressure, the valve seat and the ball body are tightly pressed and the valve seat material is elastically and plastically deformed to achieve sealing, the valve body and the ball body are made of metal materials, the valve seat is made of soft non-metal materials, when the ball valve is applied to cold and hot working environments, the valve seat and the valve body are different in materials, and the expansion with heat and the contraction with cold are inconsistent, so that the ball valve is easy to leak or the valve is out of operation. The prior dome valve utility model adopts the combination of air bag inflation and expansion and spherical surface to realize sealing and block medium circulation; because the air bag is sealed and needs gas to expand to be attached to the spherical surface, the material and the service life of the air bag cannot reach the continuous effect of using industrial and mining due to inherent factors (the air bag is worn, soft materials are easy to fatigue and break under a high-temperature environment), even if the air bag is replaced by the fluororubber materials, the medium in the pipeline is particles, so that the air bag is easy to wash and damage; because the working conditions of many occasions of the power plant are very bad, the service life of the air bag type soft sealing dome valve on the market is very short in the using process, and the air bag needs to be replaced in a short period, so that the production and the maintenance are inconvenient.

The application document submitted by the inventor before describes a novel double-sealing type dome valve and the like, the dome valve achieves the purpose of cutting off media by the contact of the valve seat of a soft sealing piston and a hard sealing piston with a ball valve, the sealing of the dome valve by adopting a metal material has more reliable performance and service life than the traditional sealing, the number of later maintenance is greatly reduced, but when the dome valve is opened and closed, the ball valve and the piston can be attached too tightly, so that the piston can be inclined at one time, and the subsequent use experience is influenced; and secondly, the scraping and rubbing between the ball valve and the piston can be serious, and the service life of the ball valve is shortened.

SUMMERY OF THE UTILITY MODEL

This section is for the purpose of summarizing some aspects of embodiments of the utility model and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the abstract of the specification and the title of the application to avoid obscuring the purpose of this section, the abstract of the specification and the title of the application, and such simplifications or omissions are not intended to limit the scope of the utility model.

The present invention has been made in view of the above and/or other problems associated with the prior art use of double seal dome valves.

Therefore, the utility model aims to solve the problems that the tight fit between the ball valve and the piston can cause abrasion and reduce the service life, and the piston can be inclined to influence the use.

In order to solve the technical problems, the utility model provides the following technical scheme: a resilient structure for application to a dome valve, comprising,

the connecting piece is connected with the spherical center bracket and the ball valve, one end of the connecting piece is arranged in the spherical center bracket, and the other end of the connecting piece is arranged in the ball valve; and the number of the first and second groups,

the elastic piece is sleeved on the connecting piece and limited in the spherical center bracket;

the ball valve moves along the axial direction, and the movement range depends on the lengths of the connecting piece and the elastic piece.

As a preferred aspect of the present invention, applied to the elastic structure of the dome valve, wherein: the ball valve is characterized in that the middle of the ball center support is of a circular ring structure, a plurality of connecting grooves are formed in the circular ring, the ball valve is a hemisphere, a plurality of connecting holes are formed in one end of the circular surface of the ball valve, and the connecting piece is connected with the connecting grooves and the connecting holes in a matched mode.

As a preferred aspect of the present invention, applied to the elastic structure of the dome valve, wherein: the elastic part is limited in the connecting groove, and the spherical center support is coaxially connected with the ball valve.

As a preferred aspect of the present invention, applied to the elastic structure of the dome valve, wherein: the ball valve is made of stellite alloy material.

As a preferred aspect of the present invention, applied to the elastic structure of the dome valve, wherein: a double-seal dome valve comprises an elastic structure and a piston air chamber, wherein the piston air chamber comprises a pneumatic connecting structure which comprises a valve body and a connecting shaft; and a sealing structure connected with the valve body.

As a preferable aspect of the double-sealed dome valve of the present invention, wherein: the valve body is of a hollow cylindrical structure, two opposite first connecting holes are formed in the cylindrical surface of the valve body along the radial direction, the connecting shaft comprises a front shaft and a rear shaft, two opposite second connecting holes are formed in the two ends of the spherical center support along the radial direction, and the connecting shaft is installed in the first connecting holes and connected with the second connecting holes.

As a preferable aspect of the double-sealed dome valve of the present invention, wherein: the sealing structure comprises a valve cover, a piston ring and a sealing ring, wherein the valve cover is of a flange structure and is arranged on a circular surface at one end of the valve body.

As a preferable aspect of the double-sealed dome valve of the present invention, wherein: the valve cover is provided with a circular ring-shaped air groove close to the inner ring part of the circular ring, the piston ring is installed in the air groove, the size of the piston ring is completely attached to the air groove, and the piston ring is matched with the air groove to form a complete sealing cavity.

As a preferable aspect of the double-sealed dome valve of the present invention, wherein: and one surface of the piston ring, which is far away from the air groove, is provided with a circular groove, and the sealing ring is arranged in the groove.

As a preferable aspect of the double-sealed dome valve of the present invention, wherein: the piston ring is made of stellite alloy materials, and the sealing ring is made of rubber materials.

The utility model has the beneficial effects that: the dome valve is reasonable in design and compact in structure, and is different from the conventional dome valve in that the sealing ring is inflated and expanded to form sealing, an air bag sealing ring with short service life is abandoned, the service life of the dome valve is greatly prolonged, and the field maintenance rate is reduced; and through the design of increasing elastic construction for the dome valve can open freely, is difficult for the jam, and after closing the valve, form line seal between ball valve and the piston, can not have the material to get into, reaches zero and leaks.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:

figure 1 is a cross-sectional view relating to a resilient structure applied to a dome valve.

Figure 2 is an overall assembly block diagram of the double seal dome valve.

Figure 3 is a cross-sectional view of the integral assembly of the double seal dome valve.

Figure 4 is a schematic view of the seal in the double seal dome valve.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the utility model. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1, there is provided a first embodiment of the present invention, which provides an elastic structure 100 applied to a dome valve installed on a double-sealed dome valve, the elastic structure 100 applied to the dome valve including: the connecting piece 101 is connected with the spherical center bracket 102 and the ball valve 103, one end of the connecting piece 101 is arranged in the spherical center bracket 102, and the other end of the connecting piece 101 is arranged in the ball valve 103; the elastic piece 104 is sleeved on the connecting piece 101, and the elastic piece 104 is limited in the spherical center bracket 102; the elastic member 104 moves in the axial direction, and the movement range depends on the lengths of the connecting member 101 and the elastic member 104.

Specifically, the middle of the center support 102 is a circular ring structure, the circular ring is provided with a plurality of connecting grooves 102a, the ball valve 103 is a hemisphere, one end of the circular surface of the ball valve 103 is provided with a plurality of connecting holes 103a, and the connecting piece 101 is connected with the connecting grooves 102a and the connecting holes 103a in a matching manner. The elastic member 104 is retained in the coupling groove 102a, and the center support 102 is coaxially coupled to the ball valve 103. The embodiment is simple and applicable in structure, high in fault tolerance rate and relatively small in manufacturing process and difficulty.

In addition, the ball valve 103 is made of stellite alloy material, and the performance comparison table of the stellite alloy material and other materials is as follows:

performance of	Hardness of	Wear resistance	Price
				Stainless steel	In	Is low in	Is low in
Stellite alloy	Height of	Height of	Height of
				Fluorine glue	Is low in	Height of	Is low in

Based on the above, through the matching of the connecting piece 101 and the elastic piece 104, the ball valve 103 has a certain floating space, the application environment of the whole dome valve is in a pneumatic conveying system, when the dome valve is closed, the ball valve 103 is jacked up and tightly attached to other parts of the dome valve under the influence of air pressure, the sealing performance is excellent, and zero leakage of materials can be achieved; when the dome valve is opened, the system is deflated, the ball valve 103 is not tightly attached under the influence of factors such as self gravity, elasticity of the elastic piece 104 and the like, rubbing can be avoided, stellite alloy is adopted, and the service life is greatly prolonged.

Example 2

Referring to fig. 2 to 4, a second embodiment of the present invention is based on the previous embodiment, and is different from the first embodiment in that: a double-sealing dome valve comprises an elastic structure 100 and a piston air chamber 200, wherein the elastic structure 100 is described in the previous embodiment, and the piston air chamber 200 comprises a pneumatic connecting structure 201 which comprises a valve body 201a and a connecting shaft 201 b; and a seal structure 202 connected to the valve body 201.

Specifically, the valve body 201a is a hollow cylindrical structure, two opposite first connection holes 201a-1 are radially formed in a cylindrical surface of the valve body, the connection shaft 201b includes a front shaft 201b-1 and a rear shaft 201b-2, two opposite second connection holes 201a-2 are radially formed in two ends of the center ball support 102, and the connection shaft 201b is installed in the first connection holes 201a-1 and connected with the second connection holes 201 a-2. Wherein, the connecting shaft is connected with a pneumatic device, in addition, the electric leakage detection control is also matched with the pneumatic device, the opening and closing action of the dome valve is that the pneumatic device controls the connecting shaft 201b to rotate, thereby driving the ball center bracket to ensure that the ball valve can rotate 90 degrees in a positive and negative way.

Further, the sealing structure 202 includes a valve cover 202a, a piston ring 202b, and a sealing ring 202c, and the valve cover 202a is a flange structure and is mounted on an end circular surface of the valve body 201 a. The valve cover 202a is provided with a circular ring-shaped air groove 202a-1 near the inner ring part of the circular ring, the piston ring 202b is arranged in the air groove 202a-1, the piston ring 202b is completely attached to the air groove 202a-1 in size, and a complete sealing cavity Q is formed by matching the piston ring 202b and the air groove 202 a-1. When the valve is closed, the cylinder controls the ball valve 103 to rotate to the full-closed position of the valve drift diameter, and then the sealing cavity Q is inflated to ensure that the piston ring 202b is tightly contacted with the spherical surface of the ball valve 103 to ensure sealing; when the valve is opened, the sealing cavity Q is firstly deflated, and when the piston ring 202b is not in pressure contact with the ball valve, the ball valve is controlled to rotate to the position of full opening of the through diameter of the valve.

An annular groove 202b-1 is formed in one surface, away from the air groove 202a-1, of the piston ring 202b, a sealing ring 202c is installed in the groove 202b-1, the piston ring 202b is made of stellite alloy materials, and the sealing ring 202c is made of rubber materials. The sealing ring 202c and the piston ring 202b are matched to form double sealing, and meanwhile, the sealing ring also has a certain buffering effect, so that the service life of the valve is prolonged.

Based on the aforesaid, elastic construction 100 and the sealed cooperation of inflatable metal for this dome valve can reach the frictionless condition of opening and close, can not produce the jam, and the material has been avoided revealing to the double containment form simultaneously, and life also promotes greatly than traditional dome valve.

It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the utility model, or those unrelated to enabling the utility model).

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.

It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims

1. A resilient structure (100) for application to a dome valve, characterized by: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

the connecting piece (101) is used for connecting the spherical center bracket (102) and the ball valve (103), one end of the connecting piece is arranged in the spherical center bracket (102), and the other end of the connecting piece is arranged in the ball valve (103); and the number of the first and second groups,

the elastic piece (104) is sleeved on the connecting piece (101), and the elastic piece (104) is limited in the spherical center bracket (102);

the elastic part (104) moves along the axial direction, and the movement range depends on the lengths of the connecting part (101) and the elastic part (104).

2. A resilient structure (100) for use with a dome valve as set forth in claim 1 wherein: the ball valve is characterized in that the middle of the spherical center support (102) is of a circular ring structure, a plurality of connecting grooves (102a) are formed in the circular ring, the ball valve (103) is a hemisphere, a plurality of connecting holes (103a) are formed in one end of the circular surface of the ball valve, and the connecting piece (101) is connected with the connecting grooves (102a) and the connecting holes (103a) in a matched mode.

3. A resilient structure (100) for use with a dome valve as set forth in claim 2 wherein: the elastic piece (104) is limited in the connecting groove (102a), and the spherical center support (102) is coaxially connected with the ball valve (103).

4. A resilient structure (100) for use with a dome valve as set forth in claim 3 wherein: the ball valve (103) is made of stellite alloy material.

5. A double-seal dome valve characterized by: comprising a spring structure (100) according to claims 1 to 4, a piston air chamber (200), the piston air chamber (200) comprising,

the pneumatic connecting structure (201) comprises a valve body (201a) and a connecting shaft (201 b); and the number of the first and second groups,

and a seal structure (202) connected to the valve body (201 a).

6. The double-sealed dome valve as set forth in claim 5, wherein: the valve body (201a) is of a hollow cylindrical structure, two opposite first connecting holes (201a-1) are formed in the cylindrical surface of the valve body in the radial direction, the connecting shaft (201b) comprises a front shaft (201b-1) and a rear shaft (201b-2), two opposite second connecting holes (201a-2) are formed in the two ends of the spherical center support (102) in the radial direction, and the connecting shaft (201b) is installed in the first connecting holes (201a-1) and connected with the second connecting holes (201 a-2).

7. The double-sealed dome valve of claim 6, wherein: the sealing structure (202) comprises a valve cover (202a), a piston ring (202b) and a sealing ring (202c), wherein the valve cover (202a) is of a flange structure and is arranged on one end circular surface of the valve body (201 a).

8. The double-sealed dome valve of claim 7, wherein: the valve cover (202a) is provided with a circular air groove (202a-1) close to the inner ring of the circular ring, the piston ring (202b) is installed in the air groove (202a-1), the piston ring (202b) is completely attached to the air groove (202a-1) in size, and the piston ring (202b) and the air groove (202a-1) are matched to form a complete sealing cavity (Q).

9. The double-sealed dome valve of claim 8, wherein: an annular groove (202b-1) is formed in one surface, away from the air groove (202a-1), of the piston ring (202b), and the sealing ring (202c) is installed in the groove (202 b-1).

10. The double-sealed dome valve of claim 9, wherein: the piston ring (202b) is made of stellite alloy material, and the sealing ring (202c) is made of rubber material.