JPH10281609A - Distributing equipment of liquefied gas - Google Patents

Abstract

PROBLEM TO BE SOLVED: To jet cold gas supplied from a pressure vessel from each of branch nozzles uniformly through a distributing device. SOLUTION: A bar shape main body is formed by arranging blind holes 26 from a top edge to a bottom edge inside the bar shape main body 25, forming each of slope parts 29 on both sides of a small diameter part 28 formed on the lower edge outer surface of the main body and forming small diameter nozzles 31 square to each of the slopes at the uniform pitch in the circumferential direction. A housing 21 having a space part 24 inside of which is sealed connecting each of branch pipes 16 separately on the bottom surface of the housing 21 accommodating the lower part of the main body 25 is formed. Forming uniform fine droplets colliding liquefied gas each other being jet from each of the opposing nozzles 31 arranged inside the housing, the fine droplets are distributed to the branch pipe 16 uniformly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distributor for uniformly distributing a plurality of liquefied gases for maintaining freshness, such as fresh foods and frozen foods.

[0002]

2. Description of the Related Art Conventionally, a distributor 5 is mounted at one end of a pipe 4 connected to a valve 2 attached to the mouth of a pressure vessel 1 containing a liquid gas such as liquid nitrogen. The pipes 7 are connected to each other, and the nozzles 8 for ejecting the cooling gas from the tip of each branch pipe 7 are mounted respectively. The conventional distributor 5 simply comprises a plurality of branch pipes 7, 7
The liquefied gas sent through the pipe 2 becomes large, medium, and small sparse particles that pass through the pipes and distributors. Therefore, a uniform amount of liquefied gas cannot be distributed from the tip of each nozzle.

[0003] When gas mixed in a state of non-uniform particle shape enters each branch pipe 7, it becomes clogged in the branch pipe (back pressure is generated in the pipe when large particles try to pass through). However, the gas was difficult to flow and could not be uniformly ejected. In addition, a plurality of branch pipes 7
When the cool gas enters, the inflow of the gas differs depending on the size of the particles, and the amounts of the cool gas ejected from the nozzles 8 attached to the ends of the respective branch pipes are not uniform. That is, in the conventional gas distributor 5, since the gas flow rate flowing into the distributor from the pipe 7 is high, the loss due to vaporization during adiabatic expansion is large, and the conversion efficiency from the storage tank pressure to the atmospheric pressure is not good.

[0004]

As described above, a plurality of branch pipes 7 connected to the pressure vessel 1 via the distributor 5 are provided.
Cold gas is supplied to the nozzle, and the cool gas is ejected from a nozzle 8 attached to the tip of each branch pipe 7. However, when the volume is rapidly expanded in the distribution gas, a non-uniform particle shape occurs. There has been a problem that the flow of the branch pipe deteriorates, the cooling gas ejected from the nozzle becomes uneven, and a difference occurs in the cooling temperature. SUMMARY OF THE INVENTION It is an object of the present invention to uniformly discharge cold gas supplied from a pressure vessel from each branch nozzle via a distributor.

[0005]

According to the present invention, a rod-shaped main body is provided with a blind hole from the upper end to a substantially lower end, and slopes are formed on both sides of a small diameter portion formed on an outer peripheral surface of the lower end of the main body. A small-diameter nozzle formed perpendicular to each slope portion communicates with the blind hole and a main body provided at equal intervals in the circumferential direction, and a small-diameter portion of the rod-shaped main body is housed therein,
A plurality of branch pipes are separately connected to a bottom surface, and a housing having a space portion in which the inside is sealed by separately connecting the bar-shaped body is disposed in the space portion of the housing, and is ejected from each nozzle facing each other via a small diameter portion. Droplets having a uniform gas-liquid concentration of the liquefied gas formed by colliding the gas with each other are formed in the space, and are uniformly distributed to each branch pipe.

[0006] A plurality of small-diameter nozzles are provided at regular intervals in the circumferential direction on slopes formed symmetrically on both sides of a small-diameter portion provided on the lower periphery of the main body in communication with the blind hole. The cool air gas ejected from the nozzle collides around each small diameter part, effectively utilizing the latent heat during adiabatic expansion of each other, and the cool air gas ejected from nozzles provided opposite to each other collides in the circumferential direction. Due to the formed droplets,
The gas-liquid concentration in the space of the housing can be made uniform, and the occurrence of non-uniform particle shapes can be prevented.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 2-4, a valve 11 is mounted at the mouth of a pressure vessel 10 for containing a liquefied gas for cooling such as liquid nitrogen or liquid oxygen. They are connected by a pipe 12. This distribution device 14
A plurality of branch pipes 16 and 16 are attached to the bottom of the fork pipe, and branch nozzles 20 and 20 are respectively mounted on the tip of a forked pipe 18 connected to the tip of each branch pipe.

Referring to FIGS. 5 and 6, the distributing device 14 will be described. A housing 21 is formed to be slender and formed to have a substantially square or circular cross section, and a space 24 is provided with the inside closed. A cylindrical portion 22 is integrally formed, and an upper portion of the cylindrical portion is closed, and a screw hole 23 is provided at the center thereof. A screw portion 25a provided on the upper part of the rod-shaped main body 25 is screwed into the screw hole 23 of the housing, and a blind hole 26 is formed in the main body from the upper end to the substantially lower end.

Approximately 4 mm symmetrically between both sides of the small diameter portion 28 provided on the substantially lower outer peripheral surface of the main body 25 and the outer peripheral surface of the main body.
Five-degree slopes 29, 29 are formed, and small-diameter nozzles 31, 3 are formed in the middle of each slope 29 at right angles to the slopes.
A plurality (1 in this embodiment) of 1 are bored at equal intervals in the circumferential direction. One end of the nozzle 31 communicates with the blind hole 26, the other end opens outside the main body 25, and a small diameter portion 28 provided at the lower portion of the rod-shaped main body 25 is located in the housing 21. The diameter of the nozzles 31 provided at equal intervals in the circumferential direction at the intermediate portion of the slope portion 29 is formed in a range of 0.4 to 1.4 mm, preferably 0.8 mm.

On a straight line passing through the centers of the nozzles 31 facing each other, the droplets 32 which collide with the inner wall surface in the space 24 of the housing located on the outer periphery of the main body 25
Are formed in a film shape from a gas-liquid mixed substance, and the droplets 32 are used to make the particles uniform. That is, the concentration of the gas-liquid fine particles in the space portion 24 of the housing is made uniform, so that the gas-liquid fine particles are easily distributed to the branch pipe 16 evenly.

The operation of the embodiment will be described.
For example, the liquid temperature in the pressure vessel 10 filled with liquefied nitrogen gas at a pressure of 7 kg / cm 2 is −172 ° C., and the liquefied gas ejected from the pressure vessel 10 is a pipe 12
Is supplied into the blind hole 26 of the rod-shaped main body 25. The gas pressurized into the blind hole 26 is discharged from a plurality of nozzles 31 provided at equal intervals in the radial direction on the inner wall surface of the blind hole. Here, the liquefied gas refers to liquefied nitrogen gas, liquefied oxygen gas, liquefied argon gas and the like.

The gas discharged from the nozzles 31 and 31 into the space 24 of the housing is discharged in the form of fine droplets. However, the gas and liquid particle densities are made uniform, and the branch pipe 16 and the forked pipe 18 are separated. And is discharged from the nozzle 20.

[0013]

According to the present invention, the gas pressurized into the blind hole provided in the main body is opened at the middle portion of the slope portion provided symmetrically on both sides of the small diameter portion provided on the outer periphery of the lower end of the main body. The liquefied gas discharged from the nozzles provided symmetrically in the circumferential direction makes the gas-liquid mixture of the gas discharged into the space of the housing uniform by the fine particles generated by collision with each other,
Distribute liquefied gas filled with uniform particles in the branch pipe by preventing mixing of non-uniform particles, maintain freshness of fresh food products, etc., and shorten the manufacturing process of fresh food products, etc. be able to.

[Brief description of the drawings]

FIG. 1 is a front view of a state in which a conventional pressure vessel and a distribution nozzle are connected by a distribution device.

FIG. 2 is a plan view showing a piping state of a pressure vessel and a branch pipe in the distribution device according to the present invention.

FIG. 3 is a front view of FIG. 2 with a part omitted.

FIG. 4 is a side view of FIG. 3 with a part omitted.

FIG. 5 is a longitudinal sectional view of a distribution device having a plurality of branch pipes connected to a lower portion.

FIG. 6 is an enlarged cross-sectional view in the direction of line AA in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 14 Distributing device 16 Branch pipe 21 Housing 24 Space part 25 Bar-shaped main body 26 Blind hole 28 Small diameter part 29 Slope part 31 Nozzle 32 Spray particle

Claims (1)

[Claims] 1. A blind hole is provided in the inside of a rod-shaped main body from an upper end to a substantially lower end, and slopes are respectively formed on both sides of a small diameter portion formed on an outer peripheral surface of a lower end of the main body, and formed at right angles to the respective slopes. The nozzle having a small diameter is communicated with the blind hole and the main body is provided at equal intervals in the circumferential direction.The small diameter portion of the rod-shaped main body is accommodated therein, and a plurality of branch pipes are separately connected to the bottom surface. The rod-shaped main body is disposed in the space of the housing, and the gas ejected from the nozzles facing each other through the small diameter portion collide with each other to reduce the gas-liquid concentration of the liquefied gas. A liquefied gas distributing device, wherein uniformized droplets are formed in the space and uniformly distributed to each branch pipe.