CN221120942U

CN221120942U - Three-eccentric rubber soft sealing butterfly valve

Info

Publication number: CN221120942U
Application number: CN202323267399.3U
Authority: CN
Inventors: 周位伟; 刘诗梅; 郝娇山; 张黎; 余晓光; 周枭
Original assignee: Chongqing Chuanyi Control Valve Co Ltd
Current assignee: Chongqing Chuanyi Control Valve Co Ltd
Priority date: 2023-11-30
Filing date: 2023-11-30
Publication date: 2024-06-11
Anticipated expiration: 2033-11-30

Abstract

The utility model provides a three-eccentric rubber soft sealing butterfly valve, which comprises a valve body and a valve rod, wherein the valve rod is inserted into the valve body, the valve rod is further provided with a valve plate, the valve plate is driven to rotate by rotating the valve rod, the valve plate is used for opening or closing a valve port on the valve body, a sealing ring is further arranged between the valve plate and the valve port, the sealing ring comprises a skeleton ring and a rubber layer arranged on the outer wall of the skeleton ring, the edge of the outer ring of the rubber layer is obliquely arranged, and the inclined surface of the rubber layer faces to the sealing surface of the valve port.

Description

Three-eccentric rubber soft sealing butterfly valve

Technical Field

The utility model relates to the field of butterfly valves, in particular to a three-eccentric rubber soft sealing butterfly valve.

Background

Helium can be used as a shielding gas in electric welding and silicon wafer production. Liquid helium is one of the most dominant sources of low temperature, as a coolant, used in many industries, such as: low temperature superconducting technology, nuclear reactor cooling, medical nuclear magnetic resonance equipment cooling, and the like. Has strategic material positions worldwide.

The liquid helium extraction system is characterized in that the liquid helium extraction system is used as a peripheral pipeline of the liquid helium extraction system, more liquid helium extraction system exists in a gas form, and no low-temperature requirement is required for a valve.

However, due to the characteristics of small molecules, easy permeation and the like of helium and the high value caused by the scarcity of the helium, the pipeline is required to be under high pressure, namely, the leakage of the helium is required to be avoided, the pollution caused by the permeation of other external gases is also avoided, the purity of the helium in the pipeline is ensured, and the high requirement on the tightness of the valve is provided;

The existing butterfly valve mostly adopts a metal and nonmetal plate-shaped composite multilayer hard sealing structure, and the other butterfly valve is of an all-metal structure, but when the working condition requirement of vacuum requirement and the micro leakage requirement in a liquid helium device exist, the sealing requirement cannot be met by the two structures.

Disclosure of utility model

In view of the above-mentioned drawbacks of the prior art, the present utility model aims to provide a three-eccentric rubber soft sealing butterfly valve, which is used for solving the technical problem that the existing sealing structure cannot meet the sealing requirement in the prior art when the working condition requirement of vacuum requirement and the micro leakage requirement in the liquid helium device are met.

To achieve the above and other related objects, the present utility model provides a triple eccentric rubber soft seal butterfly valve comprising:

The valve rod is inserted into the valve body, a valve plate is further arranged on the valve rod, and the valve plate is driven to rotate by rotating the valve rod and is used for opening or closing a valve port on the valve body;

The valve plate with still be equipped with the sealing washer between the valve port, the sealing washer includes skeleton circle and sets up the rubber layer of skeleton circle outer wall, the outer lane edge slope setting of rubber layer, the inclined plane of rubber layer orientation the sealed face of valve port.

The sealing ring has the advantages that the elasticity of the sealing ring rubber is utilized, so that the sealing performance of the butterfly valve cannot be affected by temperature change, the sealing surface of the sealing ring is obliquely arranged to adapt to the three-eccentric structure of the butterfly valve, the problems of friction and extrusion in the opening and closing process of the valve are solved, meanwhile, the framework is arranged in the sealing ring, the strength problem of the sealing ring is solved, and the problems that the sealing ring is damaged or the sealing performance cannot reach the standard when the sealing performance is different due to the extrusion force of the pressing ring are solved.

Optionally, the skeleton ring is a metal skeleton.

Optionally, the cross section of the skeleton ring is of a rectangular structure.

Optionally, the sealing surface of the valve port is obliquely arranged, the inclined surface of the valve port faces the inside of the valve body, the edge of the valve plate is obliquely arranged, and the edge inclination of the valve plate is the same as the inclination of the sealing surface of the valve port.

Optionally, the inclination angle of the outer ring edge of the sealing ring is the same as the inclination angle of the valve port sealing surface.

Optionally, a pressing ring is further arranged on the edge of the valve plate, the sealing ring is located between the pressing ring and the valve plate, the pressing ring is used for pressing the sealing ring, and the pressing ring is fixed on the valve plate through a screw.

Optionally, a positioning hole is radially formed in the valve rod in a penetrating mode, a cylindrical pin is arranged in the positioning hole in a penetrating mode, and the valve plate is connected with the valve rod through the cylindrical pin.

Optionally, an installation groove is further formed in the edge of the outer ring of the valve plate, the installation groove is used for installing the sealing ring, and the sealing ring extends out of the installation groove.

Optionally, a plurality of bearings are further arranged in the valve body, and the valve rod is arranged in the valve body through the bearings.

Optionally, a sealing structure is further arranged at the joint of the valve body and the valve rod provided with the bearing.

As described above, the three-eccentric rubber soft sealing butterfly valve has the following beneficial effects: utilize the elasticity of sealing washer rubber for the sealing performance of butterfly valve can not receive temperature variation's influence, sets up the sealed face slope of sealing washer with the triple eccentric structure of adaptation butterfly valve, has solved the friction of valve in-process of opening and close, extruded problem, sets up the skeleton in the sealing washer simultaneously, has solved the intensity problem of sealing washer, when making its sealing performance receive the extrusion force of clamping ring different, can not appear the sealing washer damage or sealing performance is the scheduling problem not up to standard.

Drawings

FIG. 1 is a schematic view of a partial cross-sectional structure in one embodiment of the utility model;

FIG. 2 is a partial enlarged view of the portion X in FIG. 1;

FIG. 3 is a schematic cross-sectional view of a seal ring 4 according to another embodiment of the present utility model;

FIG. 4 is a schematic partial cross-sectional view of a prior art seal ring employing multiple layers;

FIG. 5 is a schematic partial cross-sectional view of a prior art O-ring seal;

FIG. 6 is a schematic partial cross-sectional view of a prior art seal ring of a triple eccentric construction using a unitary nonmetallic material.

Description of the part reference numerals

1. Valve body

2. Valve rod

3. Valve plate

4. Sealing ring

6. Pressing ring

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model.

Please refer to fig. 1 to 6. It should be noted that, the illustrations provided in the present embodiment merely illustrate the basic concept of the present utility model by way of illustration, and only the components related to the present utility model are shown in the illustration, rather than being drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of each component may be arbitrarily changed, and the layout of the components may be more complex. The structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the disclosure of the present utility model, and are not intended to limit the scope of the utility model, so any modification, variation of proportions, or adjustment of sizes of structures, proportions, etc. should not be considered as limiting the scope of the utility model, which is otherwise, set forth in the claims, without affecting the efficacy of the utility model or the objects attained. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the utility model, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the utility model may be practiced.

Referring to fig. 1 to 3, the present utility model provides a triple eccentric rubber soft seal butterfly valve, comprising:

The valve comprises a valve body 1 and a valve rod 2, wherein the valve rod 2 is inserted into the valve body 1, a valve plate 3 is further arranged on the valve rod 2, and the valve plate 3 is driven to rotate by rotating the valve rod 2 and is used for opening or closing a valve port on the valve body 1;

The valve plate 3 with still be equipped with sealing washer 4 between the valve port, sealing washer 4 includes the skeleton circle and sets up the rubber layer of skeleton circle outer wall, the outer lane edge slope setting of rubber layer, the inclined plane of rubber layer orientation the sealed face of valve port.

Illustratively, the skeletal ring is a metal skeletal.

It should be noted that, the metal framework is adopted, so that the sealing ring 4 does not generate larger deformation along with the time under the working conditions of alternating temperature and larger temperature difference, and the condition of reduced sealing performance is avoided.

Illustratively, the cross-section of the skeleton ring is rectangular in structure.

It should be noted that the pressing ring has a better pressing effect when the pressing ring presses the sealing ring 4.

In one embodiment, the cross section of the skeleton ring can be circular, and an inclined plane is arranged to be matched with the valve port when rubber is wrapped, so that the sealing effect is ensured.

Illustratively, the sealing surface of the valve port is inclined, the inclined surface of the valve port faces the inside of the valve body 1, the edge of the valve plate 3 is inclined, and the inclination of the edge of the valve plate 3 is the same as the inclination of the sealing surface of the valve port.

Illustratively, the outer ring edge of the sealing ring 4 is inclined at the same angle as the valve port sealing surface.

Illustratively, a pressing ring 6 is further arranged on the edge of the valve plate 3, the sealing ring 4 is located between the pressing ring 6 and the valve plate 3, the pressing ring is used for pressing the sealing ring 4, and the pressing ring 6 is fixed on the valve plate 3 through a screw.

Illustratively, the valve rod 2 is further radially perforated with a positioning hole, a cylindrical pin is perforated in the positioning hole, and the valve plate 3 is connected with the valve rod 2 through the cylindrical pin.

Illustratively, the outer ring edge of the valve plate 3 is further provided with a mounting groove, the mounting groove is used for mounting the sealing ring 4, and the sealing ring 4 extends out of the mounting groove.

Illustratively, a plurality of bearings are further provided in the valve body 1, and the valve rod 2 is disposed in the valve body 1 through the bearings.

Illustratively, a sealing structure is further arranged at the joint of the valve body 1 and the valve rod 2 where the bearing is arranged.

It should also be noted that the sealing structure is a graphite ring.

Exemplary, as shown in fig. 3, the cross section of the skeleton ring may be in a concave structure, so that when in processing, a plurality of supporting points are used to extend into corresponding grooves, and the rubber is integrally coated outside the skeleton ring, so that the strength problem of the sealing ring is solved.

In one embodiment, the outer wall of the framework ring can be provided with patterns for increasing the contact area between the rubber layer and the framework ring and ensuring the connection stability of the rubber layer and the framework ring.

As shown in FIG. 4, a multi-layer sealing ring is adopted, wherein the nonmetallic layer is made of materials such as tetrafluoro, polyether-ether-ketone and the like and is also affected by temperature change, so that the problem of reduced sealing performance is solved, the nonmetallic layer is made of rubber materials, and when the pressing force of a pressing ring is too large, the rubber layer protrudes out of a triple eccentric sealing surface and is cut off by a metal valve seat; when the pressing force of the pressing ring is too small, the rubber layer is contracted and not sealed.

As shown in FIG. 5, in the sealing ring made of rubber materials with an O-shaped structure in the prior art, because the valve seat is of a triple eccentric structure, friction and extrusion conditions exist in the opening and closing process of the valve, and the compression amount in the closing position of the valve is very uneven, so that the service life of the sealing ring can be influenced.

As shown in fig. 6, the sealing ring of the overall nonmetallic material triple eccentric structure is made of nonmetallic materials such as tetrafluoro and polyether ether ketone, and the sealing performance of the sealing ring is good, but the following is found in practical application: for the working conditions of alternating temperature and larger temperature difference, the sealing ring can generate larger deformation along with the time, so that the sealing performance is obviously reduced.

In summary, the three-eccentric rubber soft sealing butterfly valve provided by the utility model has the advantages that the elasticity of the rubber of the sealing ring is utilized, so that the sealing performance of the butterfly valve is not affected by temperature change, the sealing surface is obliquely arranged to adapt to the three-eccentric structure of the butterfly valve, the problems of friction and extrusion in the opening and closing process of the valve are solved, meanwhile, the framework is arranged in the sealing ring, the problem of strength of the sealing ring is solved, and the problems that the sealing ring is damaged or the sealing performance is not up to standard when the sealing performance is subjected to different extrusion forces of the pressing ring are avoided.

The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims

1. The three-eccentric rubber soft sealing butterfly valve is characterized by comprising a valve body (1) and a valve rod (2), wherein the valve rod (2) is inserted into the valve body (1), a valve plate (3) is further arranged on the valve rod (2), and the valve plate (3) is driven to rotate by rotating the valve rod (2) so as to be used for opening or closing a valve port on the valve body (1);

still be equipped with sealing washer (4) between valve plate (3) with the valve port, sealing washer (4) are in including skeleton circle and setting the rubber layer of skeleton circle outer wall, the outer lane edge slope of rubber layer sets up, the inclined plane of rubber layer orientation the sealed face of valve port.

2. The triple offset rubber soft seal butterfly valve of claim 1, wherein: the framework ring is a metal framework.

3. The triple offset rubber soft seal butterfly valve of claim 2, wherein: the section of the framework ring is of a rectangular structure.

4. A triple offset rubber soft seal butterfly valve according to claim 3, wherein: the sealing surface of the valve port is obliquely arranged, the inclined surface of the valve port faces the inside of the valve body (1), the edge of the valve plate (3) is obliquely arranged, and the edge inclination of the valve plate (3) is the same as the inclination of the sealing surface of the valve port.

5. The triple offset rubber soft seal butterfly valve of claim 4, wherein: the inclination angle of the outer ring edge of the sealing ring (4) is the same as that of the sealing surface of the valve port.

6. The triple offset rubber soft seal butterfly valve of claim 5, wherein: the edge of the valve plate (3) is also provided with a pressing ring (6), the sealing ring (4) is positioned between the pressing ring (6) and the valve plate (3), the pressing ring is used for pressing the sealing ring (4), and the pressing ring (6) is fixed on the valve plate (3) through a screw.

7. The triple offset rubber soft seal butterfly valve of claim 6, wherein: the valve rod (2) is further radially penetrated with a positioning hole, a cylindrical pin is penetrated in the positioning hole, and the valve plate (3) is connected with the valve rod (2) through the cylindrical pin.

8. The triple offset rubber soft seal butterfly valve of claim 7, wherein: the outer ring edge of the valve plate (3) is also provided with a mounting groove, the mounting groove is used for mounting the sealing ring (4), and the sealing ring (4) extends out of the mounting groove.

9. The triple offset rubber soft seal butterfly valve of claim 8, wherein: a plurality of bearings are further arranged in the valve body (1), and the valve rod (2) is arranged in the valve body (1) through the bearings.

10. The triple offset rubber soft seal butterfly valve of claim 9, wherein: the joint of the valve body (1) and the valve rod (2) provided with a bearing is also provided with a sealing structure.