CN211526067U

CN211526067U - Cryogenic pressure vessel and dry pressure tapping device thereof

Info

Publication number: CN211526067U
Application number: CN201922073217.6U
Authority: CN
Inventors: 王际强; 何卉伦; 许立国; 周鑫
Original assignee: Hangzhou Fortune Cryogenic Equipment Co ltd
Current assignee: Hangzhou Fortune Cryogenic Equipment Co ltd
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2020-09-18
Anticipated expiration: 2029-11-27

Abstract

The embodiment of the utility model discloses a dry pressure tapping device, which comprises a cylinder body, a pipe joint and a pressure tapping pipe, wherein the top of the cylinder body is closed, and the bottom of the cylinder body is fixedly arranged on the bottom wall of an inner container; the pipe joint penetrates through and is fixedly arranged on the bottom wall of the inner container, the first end of the pipe joint extends into the barrel, and gaps are respectively reserved between the top of the pipe joint and the top of the barrel and between the periphery of the pipe joint and the inner wall of the barrel; the second end of the pipe joint is fixedly connected with the pressure sampling pipe, and the pipe end of the pressure sampling pipe is communicated with the pipe hole of the pipe joint; the wall of the cylinder is provided with a plurality of cylinder wall holes, and the height of the cylinder wall holes is lower than the height of the top surface of the pipe joint. The utility model discloses the above-mentioned dry-type pressure device of cryrogenic pressure vessel's inner container assembly can obtain the pressure value steadily and carry out level measurement for the level gauge high-pressure end.

Description

Cryogenic pressure vessel and dry pressure tapping device thereof

Technical Field

The utility model relates to a cryogenic liquid stores technical field, is a cryrogenic pressure vessel and dry-type pressure device thereof more specifically.

Background

At present, the industry demands nitrogen, oxygen, argon and other gases more and more. For ease of storage and transportation, these gases need to be liquefied. The liquefaction means is mainly to reduce the temperature or compress the volume, wherein the gas with lower critical point needs to be deeply cooled while being pressurized, and the liquefaction can be completed only by configuring a corresponding cryogenic pressure vessel which mainly comprises an inner vessel, an outer vessel, a heat insulation interlayer, a pipeline accessory and the like, and in addition, a safety accessory and an instrument device are also required to be configured to meet the operation process requirements.

The existing cryogenic pressure vessel widely adopts a differential pressure method to measure liquid level, the structure of a measuring device is shown in figure 1, the measuring device mainly comprises an upper liquid valve A1, a balance valve A2, a lower liquid valve A3, an upper liquid remote transmission valve A4, a lower liquid remote transmission valve A5, a pressure taking device QY, a differential pressure liquid level meter LI and the like, and the liquid level height can be reversely deduced by detecting the difference between the upper pressure and the lower pressure in the vessel. The differential pressure method is simple in structure, relatively reliable in measurement, economical and practical, however, faults that the indication of an LI indicating instrument of the differential pressure liquid level meter is inaccurate or cannot be indicated at all often occur in practical application, inconvenience is brought to users, and serious people even can cause the liquid storage container to be unusable. The above problems are mostly related to the defects related to the submerged pipe pressure taking structure: for a wet pressure measurement structure, the liquid level fluctuation is severe, and the measurement requirement can not be met completely; various measurement problems also occur with the dry structure due to its unreasonable and complicated structure, and improvement is necessary for this purpose.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve the above-mentioned not enough of prior art, provide a cryrogenic pressure vessel and dry-type pressure device thereof.

For solving the technical problem, the utility model discloses the scheme adopts following technical scheme:

the utility model provides a dry pressure taking device, which is arranged in a cryogenic pressure vessel and comprises a cylinder body, a pipe joint and a pressure taking pipe, wherein the top of the cylinder body is closed, and the bottom of the cylinder body is fixedly arranged on the bottom wall of an inner container; the pipe joint penetrates through and is fixedly arranged on the bottom wall of the inner container, the first end of the pipe joint extends into the barrel, and gaps are respectively reserved between the top of the pipe joint and the top of the barrel and between the periphery of the pipe joint and the inner wall of the barrel; the second end of the pipe joint is fixedly connected with the pressure sampling pipe, and the pipe end of the pressure sampling pipe is communicated with the pipe hole of the pipe joint; the wall of the barrel is provided with a plurality of barrel wall holes, and the height of the barrel wall holes is lower than that of the top surface of the pipe joint.

The wall holes of the cylinder body are a plurality of, and the wall holes of the cylinder body are uniformly distributed on the wall of the cylinder body.

The barrel comprises a sealing plate and a sleeve, wherein the sealing plate is fixedly arranged at the first end of the sleeve and seals the first end of the sleeve to form the barrel.

The seal plate is welded with the first end of the sleeve; and/or the second end of the sleeve is welded, screwed or clamped with the bottom wall of the inner container; and/or the pipe joint is welded with the bottom wall of the inner container; and/or the second end of the pipe joint is welded with the pressure sampling pipe.

The pressure pipe is embedded into the pipe joint, and the pressure pipe and the pipe joint are welded.

The pressure tapping pipe is a part of an externally connected integrated liquid lower pipe of the cryogenic pressure vessel; or the pressure tapping pipe is an independent piece, and the pressure tapping pipe and the liquid lower pipe are connected into a whole through a connecting piece.

The pipe joint is made of low-temperature materials; and/or the pipe joint is axially provided with a pipe hole of the pipe joint.

The cylinder is arranged in the bottom liquid phase space of the inner container.

On this basis, the utility model also provides a cryrogenic pressure vessel, cryrogenic pressure vessel includes inner container, outer container, adiabatic intermediate layer, container pipeline and annex, the inner container installation is above the dry-type pressure device of getting.

The inner container and the outer container are made of steel respectively, and the heat insulation interlayer is vacuum heat insulation, vacuum powder heat insulation, vacuum fiber heat insulation or high-vacuum multi-layer heat insulation.

Compared with the prior art, the utility model discloses inside the barrel was deepened to the coupling, the barrel lateral wall trompil just was less than coupling top height, and outside heat spreads into the cryogenic liquids that can make the entering barrel enclosure space and gasifies gradually, forms the air pillow from this, finally can get steadily to press the level gauge high-pressure end and carry out level measurement.

Drawings

FIG. 1 is a schematic diagram of a cryogenic pressure vessel differential pressure measurement device;

fig. 2 is a schematic structural view of the dry pressure tapping device of the present invention.

In fig. 1-2, the relevant reference numbers are as follows:

1. closing the plate; 2. a sleeve; 3. a pipe joint; 4. a pressure sampling pipe; 5. an inner container; 6. an outer container; 7. feeding a liquid; 8. a submerged pipe; 9. welding flux; 10. a cylinder wall hole; 11. a pipe joint pipe hole; 12. welding flux; 13. the inner cavity of the cylinder body.

Detailed Description

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Each example is provided by way of explanation of embodiments of the invention and not limitation of embodiments of the invention.

Referring to fig. 2, a schematic structural diagram of the dry pressure tapping device of the present invention is shown. The dry pressure sampling device of the embodiment comprises a cylinder, a pipe joint 3, a pressure sampling pipe 4 and other parts; the barrel is accommodated in the inner container 5, the top of the barrel is closed, and the bottom of the barrel is installed on the bottom wall of the inner container 5, so that the barrel is fixedly installed on the bottom wall of the inner container 5 in a reverse buckling mode, the first end of the pipe joint 3 penetrates through and is fixedly installed on the bottom wall of the inner container 5 and then extends into the barrel, the second end of the pipe joint 3 is fixedly connected with the pressure sampling pipe 4, and the pipe end of the pressure sampling pipe 4 is communicated with the pipe hole of the pipe. The pipe joint 3 is made of low-temperature material (such as S30408), and is provided with a pipe joint pipe hole 11 along the axial direction; the wall of the cylinder is provided with a plurality of smaller cylinder wall holes 10, and the height of the cylinder wall holes 10 is lower than the top height of the pipe joint 3, namely lower than the height of the pipe hole 11 of the pipe joint.

It can be understood that the cylinder in this embodiment may be an integral structure, or may be assembled by several components. The structure of the barrel is described in further detail below by taking the barrel as an example of a welding assembly.

As shown in fig. 2, the dry pressure sampling device is specifically composed of a sealing plate 1, a sleeve 2, a pipe joint 3 and other components, wherein: the closing plate 1 is fixedly arranged with the first end of the sleeve 2, so that the first end of the sleeve 2 is sealed to form the cylinder, and the second end of the sleeve 2 is fixedly arranged on the bottom wall of the inner container 5, so that a closed cylinder inner cavity 13 can be formed; the pipe joint 3 penetrates through the bottom wall of the inner container 5 and is fixedly connected with the bottom wall of the inner container 5, and then extends into the cylinder body; the outer diameter of the pipe joint 3 is smaller than the inner diameter of the sleeve 2, and gaps are reserved between the top surface of the pipe joint 3 and the bottom surface of the sealing plate 1 and between the periphery of the pipe joint 3 and the inner wall of the sleeve 2; the sleeve 2 is provided with a cylinder wall hole 10 (phi 2) for communicating the inner container 5, specifically a plurality of cylinder wall holes 10 which are uniformly distributed and arranged, and the height of the cylinder wall holes 10 is lower than the height of the top of the pipe joint; the pipe joint is provided with a pipe joint pipe hole 11 (phi 6), and specifically can be a pipe joint pipe hole 11; the bottom end of the pipe joint pipe hole 11 is communicated with the pipe end of the pressure sampling pipe 4, so that a pressure sampling channel can be formed between the dry type pressure sampling device and the inner container 5 as well as between the dry type pressure sampling device and the pressure sampling pipe 4.

The dry pressure sampling device shown in fig. 2 is an assembly, and the assembly fixing manner may be welding, screwing, clamping, etc., for example, the sealing plate 1 and the first end of the sleeve 2 may be welded and fixed by a welding material 12, the second end of the sleeve 2 and the bottom wall of the inner container 5 are welded, screwed or clamped, the pipe joint 3 and the bottom wall of the inner container 5 are fixedly connected by a welding material 9, and the second end of the pipe joint 3 and the pressure sampling pipe 4 are welded. It will be appreciated that the pressure tapping line 4 may be part of a body fluid down-line 8 external to the cryogenic pressure vessel; or may be a separate piece and connected to the submerged pipe 8. Of course, the pipe joint 3 and the pressure sampling pipe 4 can adopt other assembling modes; in addition, the pressure tapping pipe 4 can be embedded into the pipe joint 3, and welding is performed between the pressure tapping pipe 4 and the pipe joint 3, which is not described again.

The embodiment of the utility model provides a by shrouding 1, sleeve pipe 2, coupling 3 and get and press pipe 4 to constitute the dry-type and get and press the device, wherein inside coupling 3 gos deep into the barrel, 2 lateral walls of sleeve pipe open has a plurality of apertures, and the aperture is less than 3 top height of coupling,

sleeve pipe

2 and 1 welding of shrouding form the enclosure space. The working principle of the dry pressure taking device is as follows: liquid in the inner container 5 enters a cylinder body of the dry pressure taking device through a corresponding small hole (with variable diameter), and part of the liquid is gasified under the action of heat transferred by the liquid lower pipe to form bubbles which move upwards and are gathered at the highest point sealing plate; after more and more bubbles are gathered, a gas phase space is formed, and liquid in the pressure taking device is pressed to overflow from the corresponding small hole; when the liquid level in the pressure measuring device reaches the height of the small hole, the small hole can be used for feeding liquid from the outside of the pressure measuring device and exhausting gas from the inside, so that balance is achieved, and a stable gas phase space, namely an air pillow space, is formed above the height of the small hole; the gas in the air pillow flows to the submerged pipe 8 through the pressure sampling pipe 4, so that the pressure at the position is stably transferred to the high-pressure end of the liquid level meter, and the liquid level is measured.

The embodiment provides a dry pressure taking device for a deep cold pressure vessel, which has a simple structure and good performance and has the following characteristics: (1) because the device forms a stable air pillow space when in use, the pressure taking pipe is a single gas phase space, and the pressure taking is stable; (2) the side part of the sleeve is provided with a plurality of small holes, so that the blockage of the device can be avoided; (3) heating copper wires (copper wires are conventionally arranged) are not arranged in the device, so that more liquid can be prevented from being gasified, and waste is avoided; (4) compared with the pressure taking device with a complex conventional structure and high processing cost, the pressure taking device is simple in structure, easy to manufacture and low in cost.

The dry pressure tapping device of the above embodiment can be configured to a cryogenic pressure vessel for liquid level measurement, wherein the cryogenic pressure vessel is composed of an inner vessel 5, an outer vessel 6, a heat insulation interlayer, vessel pipelines (such as an upper liquid pipe 7 and a lower liquid pipe 8) and accessories. The inner container 5 and the outer container 6 are made of steel, and the heat insulation interlayer can be vacuum heat insulation, vacuum powder heat insulation, vacuum fiber heat insulation or high vacuum multi-layer heat insulation, and has a good heat insulation effect. The dry pressure taking device is arranged in a liquid phase space at the bottom of the inner container 5 (specifically, arranged at a QY position in figure 1), and when external heat is transferred, low-temperature liquid in a closed space of a cylinder body of the dry pressure taking device can be gradually gasified to form an air pillow, so that pressure can be stably taken to a high-pressure end of a liquid level meter for liquid level measurement.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the embodiment of the present invention for those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the embodiments of the present invention should be included in the protection scope of the embodiments of the present invention.

Claims

1. A dry pressure taking device is configured on a cryogenic pressure vessel and is characterized by comprising a cylinder, a pipe joint and a pressure taking pipe, wherein the top of the cylinder is closed, and the bottom of the cylinder is fixedly arranged on the bottom wall of an inner container; the pipe joint penetrates through and is fixedly arranged on the bottom wall of the inner container, the first end of the pipe joint extends into the barrel, and gaps are respectively reserved between the top of the pipe joint and the top of the barrel and between the periphery of the pipe joint and the inner wall of the barrel; the second end of the pipe joint is fixedly connected with the pressure sampling pipe, and the pipe end of the pressure sampling pipe is communicated with the pipe hole of the pipe joint; the wall of the barrel is provided with a plurality of barrel wall holes, and the height of the barrel wall holes is lower than that of the top surface of the pipe joint.

2. The dry pressure tapping device as claimed in claim 1, wherein the cylinder wall hole is provided in plural, and the plural cylinder wall holes are uniformly distributed on the cylinder wall.

3. A dry pressure tapping device as claimed in claim 1, wherein the barrel comprises a sealing plate and a sleeve, the sealing plate being fixedly mounted with and closing the first end of the sleeve to form the barrel.

4. A dry pressure tapping device as claimed in claim 3, wherein the sealing plate is welded to the first end of the sleeve; and/or the second end of the sleeve is welded, screwed or clamped with the bottom wall of the inner container; and/or the pipe joint is welded with the bottom wall of the inner container; and/or the second end of the pipe joint is welded with the pressure sampling pipe.

5. A dry pressure tapping device as claimed in claim 1, wherein the pressure tapping pipe is embedded in the pipe joint and welded thereto.

6. The dry pressure tapping device as claimed in claim 1, wherein the pressure tapping pipe is part of an integral liquid down pipe externally connected to the cryogenic pressure vessel; or the pressure tapping pipe is an independent piece, and the pressure tapping pipe and the liquid lower pipe are connected into a whole through a connecting piece.

7. A dry pressure tapping device as claimed in claim 1, wherein the pipe joint is made of a low temperature material; and/or the pipe joint is axially provided with a pipe hole of the pipe joint.

8. A dry pressure tapping device as claimed in any one of claims 1 to 7, wherein the cartridge is disposed in the bottom liquid phase space of the inner vessel.

9. A cryogenic pressure vessel comprising an inner vessel, an outer vessel, a thermally insulating interlayer, vessel piping and accessories, wherein the inner vessel is fitted with a dry pressure tapping device as claimed in any one of claims 1 to 8.

10. The cryogenic pressure vessel of claim 9, the inner and outer vessels each being steel, the thermally insulating interlayer being vacuum insulation, vacuum powder insulation, vacuum fiber insulation, or high vacuum multi-layer insulation.