CN211525628U

CN211525628U - Double-chamber lengthened low-temperature pressure regulating valve

Info

Publication number: CN211525628U
Application number: CN201922296117.XU
Authority: CN
Inventors: 胡建红; 吴淑民; 罗学武; 邹帅超
Original assignee: Shanghai Figure Cryogenic Valves Co ltd
Current assignee: Shanghai Figure Cryogenic Valves Co ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-09-18
Anticipated expiration: 2029-12-19

Abstract

The utility model provides a two-chamber extension low temperature pressure regulating valve, including a valve body, be equipped with upper chamber and lower chamber in the valve body, be equipped with the valve clack in the lower chamber, be equipped with lower valve gap on the lower opening of lower chamber, the lower tip and the lower valve gap of valve clack are connected, the upper opening of upper chamber is equipped with the upper valve gap, the upper valve gap is connected with a cylinder body through the connecting pipe, the external diameter of connecting pipe is 25mm, the length of connecting pipe is 178mm, be equipped with the valve rod in the connecting pipe, the lower tip and the top joint of valve clack of valve rod, a piston is connected to the upper end of valve; the cylinder body passes through the bolt fastening with a cylinder cap, is equipped with spring and cushion in the cylinder cap, and the spring is located between piston and the cushion, and the top of cylinder cap is equipped with an adjusting screw, and adjusting screw offsets with the upper surface of cushion, and the lower surface of cushion is equipped with a cylindrical arch, and cylindrical bellied diameter is less than the internal diameter of going up the spring, and the internal diameter difference of cylindrical bellied diameter and last spring is not more than 5mm, is equipped with down the spring between valve clack and the lower valve gap.

Description

Double-chamber lengthened low-temperature pressure regulating valve

Technical Field

The utility model relates to mechanical equipment, concretely relates to double-chamber extension low temperature pressure regulating valve.

Background

In the low-temperature storage tank, the liquid-phase low-temperature medium in the storage tank flows into the vaporization pipe through the heat absorption vaporization characteristic of the low-temperature medium, the vaporization pipe is connected with the gas phase of the storage tank, and the pressure of the storage tank is increased through the vaporization of the medium. The use pressure required by the user is met. In order to control the boosting pressure, the diaphragm is mainly used for sensing the pressure to open and close the valve at the present stage, so that the purpose of controlling the pressure is achieved.

At present, the diaphragm is in an induction type, the deformable quantity of the diaphragm is small, and the opening degree of a valve is gradually reduced in the boosting process. The DN50 pressure regulating valve on the market is reduced to 25mm in diameter. The full bore cannot be achieved. The boost speed is therefore small.

SUMMERY OF THE UTILITY MODEL

Problem to prior art existence, the utility model provides a two-chamber extension low temperature pressure regulating valve to solve the problem of above-mentioned at least one kind of technique.

The technical scheme of the utility model is that: a double-chamber lengthened low-temperature pressure regulating valve comprises a valve body, wherein an upper chamber and a lower chamber are arranged in the valve body, a valve clack is arranged in the lower chamber, a lower valve cover is arranged on a lower opening of the lower chamber, the lower end part of the valve clack is connected with the lower valve cover, an upper valve cover is arranged on an upper opening of the upper chamber, the upper valve cover is connected with a cylinder body through a connecting pipe, the outer diameter of the connecting pipe is 25mm, the length of the connecting pipe is 178mm, a valve rod is arranged in the connecting pipe, the lower end part of the valve rod is clamped with the top of the valve clack, the upper end part of the valve rod is connected with a piston, and;

the cylinder body passes through the bolt fastening with a cylinder cap, be equipped with spring and cushion in the cylinder cap, the spring is located between piston and the cushion, the top of cylinder cap is equipped with an adjusting screw, adjusting screw with the upper surface of cushion offsets, the lower surface of cushion is equipped with a cylindrical arch, cylindrical bellied diameter is less than go up the internal diameter of spring, just cylindrical bellied diameter with the internal diameter difference of going up the spring is not more than 5mm, the valve clack with be equipped with down the spring between the valve gap down.

The utility model discloses an it can keep the normal atmospheric temperature with temperature in the cylinder body to lengthen the connecting pipe to get into between piston and the cylinder body through the low-temperature fluid (-196 ℃) in the valve body after the connecting pipe vaporization, through adjusting screw, give the certain power value of piston, power value and gas pressure form balancedly, when gas pressure crosses lowly in the cylinder body, go up under the spring action, the piston pushes away the valve rod, valve rod room top open valve clack, the last cavity pressure of valve body risees, in cavity pressure transmission to the cylinder body on the valve body, the piston shifts up, it shifts up to drive the valve clack, close the. The upper chamber reaches the set pressure. The utility model discloses the piston increases as the forced induction component, and the stroke increases in the cylinder body, realizes opening entirely of valve clack.

And an O-shaped sealing ring is arranged at the joint of the piston and the cylinder body, and the piston moves up and down along the length direction of the cylinder body.

The utility model discloses a sealing washer can improve holistic sealed effect.

The lateral wall of piston is equipped with two O type sealing washer, and the top of two O type sealing washers still is equipped with a guide ring.

The utility model discloses a two O type sealing washers can further play sealed effect, and the guide ring can prevent that piston or piston rod from taking place direct contact and friction with the cylinder body in the motion process, plays the effect that protection cylinder body and piston or piston rod are not impaired.

And a valve seat is arranged on the upper surface of the valve clack. The effect of supporting the valve core is achieved.

The upper surface of going up the valve gap is equipped with first extension end, first extension end laminating the outer wall of connecting pipe, the lower tip of cylinder body is equipped with the second extension end, the laminating of second extension end the outer wall of connecting pipe.

The utility model discloses an extension end can increase the area of contact with the connecting pipe.

The upper surface of the upper valve cover is also provided with an annular bulge, and the annular bulge is arranged on the periphery of the first extension end.

The utility model discloses an annular protrusion can play spacing effect.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic structural diagram of the piston of the present invention.

In the figure: the valve comprises a valve body 1, a valve clack 2, a lower valve cover 3, a lower spring 4, an upper valve cover 5, a connecting pipe 6, a cylinder body 7, a valve rod 8, a piston 9, an O-shaped sealing ring 10, a cylinder cover 11, an upper spring 12, a cushion block 13, an adjusting screw 14, a valve seat 15 and a guide ring 16.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

Example 1

As shown in fig. 1 and 2, the double-chamber lengthened low-temperature pressure regulating valve comprises a valve body 1, wherein an upper chamber and a lower chamber are arranged in the valve body, a valve clack 2 is arranged in the lower chamber, a lower valve cover 3 is arranged on a lower opening of the lower chamber, the lower end part of the valve clack is connected with a lower valve cover, an upper valve cover 5 is arranged on an upper opening of the upper chamber, the upper valve cover is connected with a cylinder body 7 through a connecting pipe 6, the outer diameter of the connecting pipe is 25mm, the length of the connecting pipe is 178mm, a valve rod 8 is arranged in the connecting pipe, the lower end part of the valve rod is clamped with the top of the valve clack, the; the cylinder body passes through the bolt fastening with a cylinder cap 11, is equipped with spring 12 and cushion 13 in the cylinder cap, and the spring is located between piston and the cushion, and the top of cylinder cap is equipped with an adjusting screw 14, and adjusting screw offsets with the upper surface of cushion, and the lower surface of cushion is equipped with a cylindrical arch, and cylindrical bellied diameter is less than the internal diameter of going up the spring, and the internal diameter difference of cylindrical bellied diameter and last spring is not more than 5mm, is equipped with down spring 4 between valve clack and the lower valve gap.

An O-shaped sealing ring 10 is arranged at the joint of the piston and the cylinder body, and the piston moves up and down along the length direction of the cylinder body. The utility model discloses a sealing washer can improve holistic sealed effect. Two O-shaped sealing rings are arranged on the side wall of the piston, and a guide ring 16 is arranged above the two O-shaped sealing rings. The utility model discloses a two O type sealing washers can further play sealed effect, and the guide ring can prevent that piston or piston rod from taking place direct contact and friction with the cylinder body in the motion process, plays the effect that protection cylinder body and piston or piston rod are not impaired. The upper surface of the flap is provided with a valve seat 15. The effect of supporting the valve core is achieved. The upper surface of going up the valve gap is equipped with first extension end, the outer wall of first extension end laminating connecting pipe, and the lower tip of cylinder body is equipped with the second extension end, the outer wall of second extension end laminating connecting pipe. The utility model discloses an extension end can increase the area of contact with the connecting pipe. The upper surface of the upper valve cover is also provided with an annular bulge, and the annular bulge is arranged on the periphery of the first extension end. The utility model discloses an annular protrusion can play spacing effect.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a two-chamber extension low temperature pressure regulating valve which characterized in that: the valve comprises a valve body, wherein an upper cavity and a lower cavity are arranged in the valve body, a valve clack is arranged in the lower cavity, a lower valve cover is arranged on a lower opening of the lower cavity, the lower end part of the valve clack is connected with the lower valve cover, an upper valve cover is arranged on an upper opening of the upper cavity, the upper valve cover is connected with a cylinder body through a connecting pipe, the outer diameter of the connecting pipe is 25mm, the length of the connecting pipe is 178mm, a valve rod is arranged in the connecting pipe, the lower end part of the valve rod is clamped with the top of the valve clack, the upper end part of the valve rod is connected with a piston;

2. The dual-chamber extended cryogenic pressure regulating valve of claim 1, wherein: and an O-shaped sealing ring is arranged at the joint of the piston and the cylinder body, and the piston moves up and down along the length direction of the cylinder body.

3. The dual-chamber extended cryogenic pressure regulating valve of claim 2, wherein: the lateral wall of piston is equipped with two O type sealing washer, and the top of two O type sealing washers still is equipped with a guide ring.

4. The dual-chamber extended cryogenic pressure regulating valve of claim 1, wherein: and a valve seat is arranged on the upper surface of the valve clack.

5. The dual-chamber extended cryogenic pressure regulating valve of claim 1, wherein: the upper surface of going up the valve gap is equipped with first extension end, first extension end laminating the outer wall of connecting pipe, the lower tip of cylinder body is equipped with the second extension end, the laminating of second extension end the outer wall of connecting pipe.

6. The dual-chamber extended cryogenic pressure regulating valve of claim 5, wherein: the upper surface of the upper valve cover is also provided with an annular bulge, and the annular bulge is arranged on the periphery of the first extension end.