阅读说明：本技术 具有低温高压弹性补偿金属密封的球阀 (Ball valve with low-temperature high-pressure elastic compensation metal seal ) 是由 王汉光 李宪厂 陈国勇 林淑媛 戚永东 于 2020-05-15 设计创作，主要内容包括：本发明公开了一种具有低温高压弹性补偿金属密封的球阀,包括阀体、左阀盖、右阀盖、左阀座和右阀座,在阀体内设置有球体且在阀体上设置有与球体相连接的阀杆,左阀座处于阀体内并通过左阀盖进行定位,右阀座处于阀体内并通过右阀盖进行定位,在左阀座外侧面与左阀盖的端面之间设有第一蝶形压片,在右阀座外侧面与右阀盖的端面之间设置有第二蝶形压片,在阀体的顶部通过螺杆固定有压盖,在阀杆与阀体的连接处设置有密封填料,在压盖的底面与密封填料的顶面之间设置有第三蝶形压片。本发明的结构设置合理,蝶形压片具有一定的弹性,可以根据压力的增加而增加压紧度,实现密封补偿从而保证球阀的整体密封性,提高使用安全性与可靠性,适用性强且实用性好。(The invention discloses a ball valve with low-temperature high-pressure elastic compensation metal seal, which comprises a valve body, a left valve cover, a right valve cover, a left valve seat and a right valve seat, wherein a ball body is arranged in the valve body, a valve rod connected with the ball body is arranged on the valve body, the left valve seat is positioned in the valve body through the left valve cover, the right valve seat is positioned in the valve body through the right valve cover, a first butterfly pressing sheet is arranged between the outer side surface of the left valve seat and the end surface of the left valve cover, a second butterfly pressing sheet is arranged between the outer side surface of the right valve seat and the end surface of the right valve cover, a gland is fixed at the top of the valve body through a screw, seal filler is arranged at the joint of the valve rod and the valve body, and a third. The butterfly-shaped pressing piece is reasonable in structure arrangement, has certain elasticity, can increase the compression degree according to the increase of pressure, realizes sealing compensation, ensures the overall sealing performance of the ball valve, improves the use safety and reliability, and is strong in applicability and good in practicability.)

1. The utility model provides a ball valve with low temperature high pressure elastic compensation metal seal, includes valve body, left valve gap, right valve gap, left disk seat and right disk seat be provided with the spheroid in the valve body and be provided with on the valve body with the valve rod that the spheroid is connected, left valve gap and right valve gap left end and the right-hand member of threaded connection's valve body respectively, its characterized in that: the left valve seat is located in the valve body and located through the left valve cover, the right valve seat is located in the valve body and located through the right valve cover, the left valve seat and the right valve seat are respectively abutted against and pressed on the left side and the right side surface of the sphere, a first butterfly pressing sheet is arranged between the outer side surface of the left valve seat and the end surface of the left valve cover, a second butterfly pressing sheet is arranged between the outer side surface of the right valve seat and the end surface of the right valve cover, a pressing cover is fixed to the top of the valve body through a screw, sealing filler is arranged at the joint of the valve rod and the valve body, a third butterfly pressing sheet is arranged between the bottom surface of the pressing cover and the top surface of the sealing filler, and the valve rod penetrates through the centers of the third.

2. The ball valve with low temperature high pressure elastic compensation metal seal according to claim 1, characterized in that: a left sealing pair is fixed between the contact surfaces of the left valve seat and the sphere, and a right sealing pair is fixed between the contact surfaces of the right valve seat and the sphere.

3. The ball valve with low temperature high pressure elastic compensation metal seal according to claim 2, characterized in that: a limiting convex ring is integrally formed at the lower part of the valve rod, and an anti-friction buffer gasket is fixed between the top surface of the limiting convex ring and the top surface of the valve body.

4. The ball valve with low temperature high pressure elastic compensation metal seal of claim 3, characterized in that: the utility model discloses a valve rod locking device, including gland, valve rod, locating plate, locating hole, handle, locating plate, locating hole, valve rod, valve.

5. The ball valve with low temperature high pressure elastic compensation metal seal of claim 4, characterized in that: and a left sealing ring is arranged between the outer side surface of the left valve seat and the inner side surface of the left valve cover, a right sealing ring is arranged between the outer side surface of the right valve seat and the inner side surface of the right valve cover, and sealing gaskets are arranged between the left valve cover and the valve body and between the right valve cover and the valve body.

6. The ball valve with low temperature high pressure elastic compensation metal seal of claim 5, characterized in that: the valve seat is made of hard alloy through surfacing welding, and the surface of the ball body is sprayed with a hard alloy surface layer through supersonic speed.

Technical Field

The invention belongs to the technical field of ball valves, and particularly relates to a ball valve with low-temperature high-pressure elastic compensation metal seal.

Background

The ball valve is a commonly used structure, and it generally comprises disk seat, valve rod, spheroid and valve gap, and its user demand that can satisfy general condition, but its sealed effect is comparatively limited, especially uses under high pressure low temperature pipeline to cause the medium to leak outward easily, and its whole valve body is comparatively fixed in the use of the ball valve of traditional technique moreover, can't increase according to the increase of pressure and compress tightly the degree, thereby cause easily when using for a long time and reveal, so suitability and practicality receive the restriction.

Disclosure of Invention

The invention aims to provide a ball valve with low-temperature high-pressure elastic compensation metal seal, which is reasonable in structure arrangement and high in applicability.

The technical scheme for realizing the aim of the invention is that the ball valve with the low-temperature high-pressure elastic compensation metal seal comprises a valve body, a left valve cover, a right valve cover, a left valve seat and a right valve seat, wherein a ball body is arranged in the valve body, a valve rod connected with the ball body is arranged on the valve body, the left valve cover and the right valve cover are respectively arranged at the left end and the right end of the valve body in threaded connection, the left valve seat is positioned in the valve body and positioned through the left valve cover, the right valve seat is positioned in the valve body and positioned through the right valve cover, the left valve seat and the right valve seat are respectively pressed on the left side surface and the right side surface of the ball body, a first butterfly pressing sheet is arranged between the outer side surface of the left valve seat and the end surface of the left valve cover, a second butterfly pressing sheet is arranged between the outer side surface of the right valve seat and the end surface of the right valve cover, a pressing cover, and a third butterfly-shaped pressing sheet is arranged between the bottom surface of the gland and the top surface of the sealing packing, and the valve rod penetrates through the centers of the third butterfly-shaped pressing sheet and the gland.

A left sealing pair is fixed between the contact surfaces of the left valve seat and the sphere, and a right sealing pair is fixed between the contact surfaces of the right valve seat and the sphere.

A limiting convex ring is integrally formed at the lower part of the valve rod, and an anti-friction buffer gasket is fixed between the top surface of the limiting convex ring and the top surface of the valve body.

The utility model discloses a valve rod locking device, including gland, valve rod, locating plate, locating hole, handle, locating plate, locating hole, valve rod, valve.

And a left sealing ring is arranged between the outer side surface of the left valve seat and the inner side surface of the left valve cover, a right sealing ring is arranged between the outer side surface of the right valve seat and the inner side surface of the right valve cover, and sealing gaskets are arranged between the left valve cover and the valve body and between the right valve cover and the valve body.

The valve seat is made of hard alloy through surfacing welding, and the surface of the ball body is sprayed with a hard alloy surface layer through supersonic speed.

The invention has the positive effects that: the structure of the ball valve is reasonable, the butterfly pressing sheets are respectively arranged between the left valve seat and the left valve cover, between the right valve seat and the right valve cover, and between the gland and the sealing filler, and the butterfly pressing sheets have certain elasticity, so that when the ball valve is used in a high-pressure low-temperature pipeline, the sealing compensation can be carried out, the torque of a switching valve can be reduced, the compression degree can be increased according to the increase of pressure, the sealing compensation is realized, the integral sealing performance of the ball valve is ensured, the leakage of a medium is prevented, the use safety and the reliability are improved, and the ball valve is strong in applicability and good in practicability.

Drawings

In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which:

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

fig. 2 is an external structural view of the present invention.

Detailed Description

(example 1)

FIG. 1 shows an embodiment of the present invention, wherein FIG. 1 is a schematic structural view of the present invention; fig. 2 is an external structural view of the present invention. In the present embodiment, directional words such as left and right are for convenience of description only and are not intended to be limiting.

Referring to fig. 1 and 2, a ball valve with a low-temperature high-pressure elastic compensation metal seal comprises a valve body 1, a left valve cover 2, a right valve cover 3, a left valve seat 4 and a right valve seat 5, wherein a ball body 6 is arranged in the valve body, a valve rod 7 connected with the ball body is arranged on the valve body, the left valve cover and the right valve cover are respectively arranged at the left end and the right end of the valve body in threaded connection, the left valve seat is arranged in the valve body and is positioned through the left valve cover, the right valve seat is arranged in the valve body and is positioned through the right valve cover, the left valve seat and the right valve seat are respectively pressed against the left side surface and the right side surface of the ball body, a first butterfly pressing sheet 8 is arranged between the outer side surface of the left valve seat and the end surface of the left valve cover, a second butterfly pressing sheet 9 is arranged between the outer side surface of the right valve seat and the end surface, and a sealing packing 11 is arranged at the joint of the valve rod and the valve body, a third butterfly-shaped pressing sheet 12 is arranged between the bottom surface of the gland and the top surface of the sealing packing, and the valve rod penetrates through the centers of the third butterfly-shaped pressing sheet and the gland. A packing cavity is formed at the upper part of the packing to prevent the medium from leaking, a butterfly-shaped pressing sheet is arranged at the upper part of the packing gland to tightly press the packing, the packing is pressed more and more tightly along with the rise of pressure, the leakage of the packing caused by the sealing failure after low temperature is prevented, the vertical core adjustment effect between the center of the valve rod and the center of the ball body is automatically adjusted, the ideal sealing effect is achieved, and the torque of the switch valve is reduced.

And a left sealing pair 13 is fixed between the contact surfaces of the left valve seat and the sphere, and a right sealing pair 14 is fixed between the contact surfaces of the right valve seat and the sphere.

A limit convex ring 15 is integrally formed at the lower part of the valve rod, and an anti-friction buffer gasket 16 is fixed between the top surface of the limit convex ring and the top surface of the valve body. In this embodiment, antifriction buffer shim not only can carry out antifriction to improve life, can cooperate the second butterfly preforming to carry out the compression regulation within a certain range moreover, in order to guarantee holistic use reliability.

The utility model provides a gland, including gland, valve rod, locating plate, locating hole 21, the top of valve rod is fixed with handle 19, the tip integrated into one piece of handle has the locating plate 20 the same with slope lock position board inclination the locating hole 21 has been seted up on the locating plate, when the handle drove the valve rod rotation, the locating plate with slope lock position board coincidence can insert the pin rod and lock the position on lock position hole and locating hole, two slope lock position boards 17 of integrated into one piece respectively on two sides of gland, and two slope lock position boards become 90 degrees settings. The manual operation is prevented, the valve is locked, and the pipe network system is better protected from being damaged.

A left sealing ring 22 is arranged between the outer side surface of the left valve seat and the inner side surface of the left valve cover, a right sealing ring 23 is arranged between the outer side surface of the right valve seat and the inner side surface of the right valve cover, and sealing gaskets 24 are arranged between the left valve cover and the valve body and between the right valve cover and the valve body.

The valve seat is made of hard alloy through surfacing welding, and the surface of the ball body is sprayed with a hard alloy surface layer through supersonic speed. The valve seat is designed to be made of hard alloy through surfacing welding, the ball body is made of the hard alloy through supersonic spraying, the reliable sealing performance of the valve at high pressure and low temperature is guaranteed, and the valve can be better sealed with the ball body through the unique design.

The structure of the ball valve is reasonable, the butterfly pressing sheets are respectively arranged between the left valve seat and the left valve cover, between the right valve seat and the right valve cover, and between the gland and the sealing filler, and the butterfly pressing sheets have certain elasticity, so that when the ball valve is used in a high-pressure low-temperature pipeline, the sealing compensation can be carried out, the torque of a switching valve can be reduced, the compression degree can be increased according to the increase of pressure, the sealing compensation is realized, the integral sealing performance of the ball valve is ensured, the leakage of a medium is prevented, the use safety and the reliability are improved, and the ball valve is strong in applicability and good in practicability.

The standard parts used in the present embodiment may be purchased directly from the market, and the non-standard structural components described in the specification and drawings may be obtained by processing without any doubt according to the common general knowledge in the art, and the connection manner of the respective parts is by the conventional means developed in the art, and the machines, parts and equipment are of the conventional type in the art, so that the detailed description thereof is omitted.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And such obvious changes and modifications which fall within the spirit of the invention are deemed to be covered by the present invention.