Liquid hydrogen stop valve with floating flange

Abstract

A liquid hydrogen stop valve with a floating flange comprises a valve body, the upper end of the valve body extends upwards to form an annular valve body, the annular valve body is sleeved with the floating flange, a first annular groove is formed in the outer side face of the annular valve body, and a second annular groove is formed in the inner side face of the floating flange. A steel wire clamping ring is arranged between the first annular groove and the second annular groove, the floating flange and the annular valve body are axially fixed through the steel wire clamping ring, a valve cover is arranged on the upper side of the annular valve body, the valve cover is fixedly connected with the floating flange through a bolt, and the valve cover extends downwards to form a coaxial annular sleeve. A metal seal is arranged between the lower end face of the valve deck and the upper end face of the annular valve body, and an O-shaped ring is arranged between the outer side face of the annular sleeve and the inner side face of the annular valve body. A floating mode is adopted between the floating flange and the valve body, so that heat conduction caused by tight contact is reduced. The contact area between the floating flange and the valve cover is small, the contact area between the valve cover and the valve body is reduced, and the contact surface of heat conduction is reduced.

Description

Technical Field

[0001] The utility model relates to the field of machinery, in particular to a valve, in particular to a liquid hydrogen stop valve with a floating flange. Background Art

[0002] The storage and transportation temperature of liquid hydrogen and liquid helium is generally below -269°C. When external heat enters the liquid hydrogen storage and transportation system, some of the liquid hydrogen will vaporize and eventually be discharged, resulting in waste. Therefore, it is necessary to improve the thermal insulation performance of the liquid hydrogen storage and transportation system. However, in the existing technology, during the operation of the liquid hydrogen stop valve, external heat is easily transferred to the valve body and liquid hydrogen through the valve cover, causing the liquid hydrogen to vaporize easily, resulting in resource waste. Summary of the Invention

[0003] The purpose of the utility model is to provide a liquid hydrogen stop valve with a floating flange, which solves the technical problem in the prior art that the valve cover easily transfers heat to the valve body.

[0004] The utility model discloses a liquid hydrogen stop valve with a floating flange, comprising a valve body, the upper end of the valve body extends upward to form an annular valve body, a floating flange is provided on the outer side of the annular valve body, a first annular groove is provided in the outer side surface of the annular valve body, a second annular groove is provided in the inner side surface of the floating flange, a wire clamp is provided between the first annular groove and the second annular groove, the floating flange and the annular valve body are axially fixed by the wire clamp, a valve cover is provided on the upper side of the annular valve body, the valve cover is fixedly connected to the floating flange by bolts, the valve cover extends downward to form a coaxial annular sleeve, a metal seal is provided between the lower end surface of the valve cover and the upper end surface of the annular valve body, an O-ring is provided between the outer side surface of the annular sleeve and the inner side surface of the annular valve body, a valve shaft is provided in the valve body, the lower end of the valve shaft is connected to the valve core, and the upper end of the valve shaft passes through the valve cover and is connected to a driving mechanism.

[0005] Furthermore, an air vent is provided in the valve cover, and the air vent opens on the outer side of the valve cover.

[0006] Compared with the prior art, the utility model has positive and obvious effects.

[0007] 1. The floating flange and the valve body are not fixedly connected, but are connected in a relatively floating manner. This design reduces the heat conduction caused by close contact.

[0008] 2. The contact area between the floating flange and the valve cover is smaller, and the contact area between the valve cover and the valve body is reduced, which reduces the contact surface for heat conduction, thereby helping to reduce the heat transfer capacity, improve the thermal insulation performance of the liquid hydrogen storage and transportation system, reduce the vaporization amount of liquid hydrogen, and reduce waste.

[0009] 3. The floating flange allows the valve cover to be adjusted and installed in any direction, making it easier to connect the air duct to the vent pipe and improving assembly flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of a liquid hydrogen stop valve with a floating flange according to the present invention.

[0011] Figure 2 for Figure 1 A partial enlarged schematic diagram. DETAILED DESCRIPTION

[0012] The following is a further description of the present invention in conjunction with an embodiment. However, the present invention is not limited to the embodiment. All similar structures and similar variations of the present invention should be included in the scope of protection of the present invention. The use of directions such as up, down, front, back, left, and right in the present invention is only for the convenience of clear description and does not limit the technical solution of the present invention.

[0013] like Figure 1-Figure 2 As shown, a liquid hydrogen stop valve with a floating flange of the present invention includes a valve body 1, the upper end of the valve body 1 extends upward to form an annular valve body 11, a floating flange 2 is provided on the outside of the annular valve body 11, a first annular groove 3 is provided in the outer side of the annular valve body 11, a second annular groove 4 is provided in the inner side of the floating flange 2, a wire clamp 5 is provided between the first annular groove 3 and the second annular groove 4, the floating flange 2 and the annular valve body 11 are axially fixed by the wire clamp 5, a valve cover 6 is provided on the upper side of the annular valve body 11, the valve cover 6 is fixedly connected to the floating flange 2 by bolts, the valve cover 6 extends downward to form a coaxial annular sleeve, a metal seal 7 is provided between the lower end surface of the valve cover 6 and the upper end surface of the annular valve body 11, an O-ring 8 is provided between the outer side surface of the annular sleeve and the inner side surface of the annular valve body 11, a valve shaft 9 is provided in the valve body 1, the lower end of the valve shaft 9 is connected to the valve core, and the upper end of the valve shaft 9 passes through the valve cover 6 and is connected to the driving mechanism.

[0014] Furthermore, an air duct 10 is provided in the valve cover 6 , and the air duct 10 opens on the outer side surface of the valve cover 6 .

[0015] Specifically, the valve body 1, wire clamp 5, valve cover 6, metal seal 7, O-ring 8, valve shaft 9, valve core, drive mechanism, air duct 10, etc. in this embodiment all adopt well-known solutions in the prior art, which are well understood by those skilled in the art and will not be described in detail here.

[0016] Advantages of this utility model:

[0017] 1. The floating flange 2 and the valve body 1 are not fixedly connected, but are connected in a relatively floating manner. This design reduces heat conduction caused by close contact.

[0018] 2. The contact area between the floating flange 2 and the valve cover 6 is small, and the contact area between the valve cover 6 and the valve body 1 is reduced, which reduces the contact surface for heat conduction, thereby helping to reduce the heat transfer capacity, improve the thermal insulation performance of the liquid hydrogen storage and transportation system, reduce the vaporization amount of liquid hydrogen, and reduce waste.

[0019] 3. The floating flange 2 allows the valve cover 6 to be adjusted and installed in any direction, making it easier for the vent 10 to connect to the vent pipe 12 and improving assembly flexibility.

Claims

1. A liquid hydrogen stop valve with a floating flange, characterized by: The cam is provided with a first annular groove and a second annular groove, and a wire clamp is provided between the first annular groove and the second annular groove. The floating flange and the annular valve body are axially fixed by the wire clamp. A valve cover is provided on the upper side of the annular valve body, and the valve cover is fixedly connected to the floating flange by bolts. The valve cover extends downward to form a coaxial annular sleeve, and a metal seal is provided between the lower end face of the valve cover and the upper end face of the annular valve body. An O-ring is provided between the outer side face of the annular sleeve and the inner side face of the annular valve body. A valve shaft is provided in the valve body, and a valve core is connected to the lower end of the valve shaft, and a drive mechanism is connected to the upper end of the valve shaft through the valve cover.

2. The liquid hydrogen stop valve with a floating flange according to claim 1, characterized in that: An air vent is provided in the valve cover, and the air vent opens on the outer side of the valve cover.

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