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Injector for cryogenic liquid. RU patent 2507438.

IPC classes for russian patent Injector for cryogenic liquid. RU patent 2507438. (RU 2507438):

F17C9/00 - Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure

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Injector for cryogenic liquid / 2507438
Cryogenic liquid injector includes a cryogenic liquid inlet assembly, a cryoreservoir and a cryogenic liquid outlet assembly. The inlet assembly includes a nozzle with an external thread, which has a channel along the axis, which is connected through a capillary to a compressed gas bottle, a transition branch pipe with a thread on inner surface for screwing of the nozzle and with through axisymmetrical holes; with that, the nozzle can have two positions: a) holes are covered and cryogenic liquid does not enter the cryoreservoir; b) holes are open and cryogenic liquid enters the cryoreservoir, and a pipeline attaching the inlet assembly to the cryoreservoir. The outlet assembly includes a discharge pipeline with a coupling and a flange with a membrane in the form of a disc, which is pressed to the outlet hole of the cryoreservoir by means of a washer plate, the inner diameter of which is chosen depending on the value of pressure required for membrane rupture, and a hold-down nut. Helium or liquid nitrogen is used as compressed gas. Liquid methane is used as cryogenic liquid.

FIELD: machine building.

SUBSTANCE: cryogenic liquid injector includes a cryogenic liquid inlet assembly, a cryoreservoir and a cryogenic liquid outlet assembly. The inlet assembly includes a nozzle with an external thread, which has a channel along the axis, which is connected through a capillary to a compressed gas bottle, a transition branch pipe with a thread on inner surface for screwing of the nozzle and with through axisymmetrical holes; with that, the nozzle can have two positions: a) holes are covered and cryogenic liquid does not enter the cryoreservoir; b) holes are open and cryogenic liquid enters the cryoreservoir, and a pipeline attaching the inlet assembly to the cryoreservoir. The outlet assembly includes a discharge pipeline with a coupling and a flange with a membrane in the form of a disc, which is pressed to the outlet hole of the cryoreservoir by means of a washer plate, the inner diameter of which is chosen depending on the value of pressure required for membrane rupture, and a hold-down nut. Helium or liquid nitrogen is used as compressed gas. Liquid methane is used as cryogenic liquid.

EFFECT: intensifying a hydrate formation process.

6 cl, 2 dwg

The invention relates to the field of cryogenic and vacuum equipment and relates to devices dosage delivery of cryogenic liquids in technological zones of high and ultrahigh pressure. The invention can be applied there where you want a single sharp drop in temperature and to create pressure in the closed volume of the liquid, in particular in the food, chemical industry, medicine.

From the field of technique known device for metered flow cryogenic fluid in sealed containers to create in them a safe inert medium and overpressure after sealing [EN 2374555, 14.04.2005, F17C 9/00; US 5385025, 1994.03.04, 65 31/00; F17C 13/02; FR 2688469, 1992.03.16, 65 31/00; F17C 9/00 and others], which are analogues of the proposed device.

A device [US 5385025, 1994.03.04, 65 31/00; F17C 13/02] for dosage delivery of cryogenic liquid, including tank for cryogenic liquid, block with concentric hole, the diameter of which is regulated installed on the bottom of the vessel and pipeline gas supply for the organization of discrete escaping cryogenic fluid from the vessel. The specified invention provides a capacity of about 200-500 resealable bottles per minute.

A device for cryogenic liquid dosage delivery [EN 2374555, 14.04.2005, F17C 9/00]containing vessel for cryogenic liquid valve filling and maintaining the level and fitting for steaming, and filler, including a valve controlled drive and a cylinder with inlet holes, and saddle with exit nozzle, the input cylinder holes communicated with the cavity of the vessel for cryogenic fluid through the pipe supply cryogenic liquid and channel for lifting mixture.

The main problem to be solved in these inventions is to provide reliable dosing equal amounts of cryogenic liquids including drip dispensing cryogenic liquid. Especially advisable to use them for dropping dosed supply of liquid nitrogen in sealed containers transported by conveyor, such as bottles, cans, packages, etc. to create in them a safe inert medium and overpressure after sealing (blockage) of these receptacles.

The famous dispensers do not use pressure for submission of cryogenic liquid cryogenic liquid flows under gravity. Dosage is performed by ADF jets of gas, which cuts the flow of cryogenic liquids.

In these devices, it is impossible to realize the conditions for receipt of gas hydrates.

The basis of the proposed invention is to provide a device dosed supply of pressurized cryogenic fluid in the zone with high pressure for initiation of a thermal explosion (explosive boiling-up), accompanied by a significant shock waves, with the aim of obtaining necessary conditions for the intensification of the process of hydrate formation.

The proposed device is based on using the phenomenon of explosive boiling-up of the cryogenic liquid, accompanied by significant hydraulic impact (shock waves) pressure (with pressure impulses) up to 50 atmospheres.

The posed problem is solved by the fact that in the injector for cryogenic liquid, which includes the node input cryogenic liquid, and output node cryogenic liquid, according to the invention node input includes fitting with external thread, having the axis channel, capillary type of sensor connected with a cylinder of compressed gas, who served under pressure from 10 to 100 atmospheres, pipe transition thread on the inner surface for screw fitting and with through axisymmetric feed holes cryogenic liquid, located opposite each other on the same axis intersects the axis of the pipe at an angle of 90 degrees, the fitting can have two positions: a) opening of the axis of the channel is closed and cryogenic liquid through the ; b) the hole 3 hole and the axis of the channel open and cryogenic fluid comes in , and a pipeline connecting node input having the form of a cylinder with a cone-shaped bottoms. In the injector for cryogenic liquid according to the invention output node includes relief pipeline with the clutch optimize length of the pipeline and flange with a membrane in the form of a disk of thin foil which is pinned to the outlet washer, internal diameter of which is selected depending on the magnitude of the required pressure of a rupture of the disc, and a clamping nut. Geometrical parameters of the pipelines, waste piping and choose from a condition of minimal heat loss and conditions strength when the pressure in the pipelines and up to 600 atmospheres. All parts of the injector insulated. As a compressed gas using helium. As a cryogenic fluid using liquid nitrogen or liquid methane.

1 shows a diagram of the injector, figure 2 shows a flange with a membrane and nut in the section, where: 1 - socket; 2 - transition tube; 3 - holes for inserting a cryogenic liquid; 4 - pipeline; 5 - ; 6 - relief pipe; 7 - clutch; 8 - flange; 9 - membrane, 10 - washer; 11 - nut.

The injector consists of a host of input cryogenic liquid or compressed gas, 5 and output node cryogenic liquid in a tank of water to create the conditions of intensification of the process of hydrate formation.

Node input includes socket 1 with external thread, having the axis channel, capillary type of sensor connected with a cylinder of compressed gas (not shown in figure 1), transition tube with 2 holes 3 to enter the cryogenic liquid and pipeline 4. The design of the unit input injector allows you to quickly fill injector cryogenic liquid and switch on the supply of compressed gas. On the inner surface of transition tube 2 has a thread for screw fitting 1, and in the lower part of the pipe are two cross-cutting axisymmetric holes 3 for the cryogenic fluid in . Holes are located on the same axis opposite each other so that their axis intersects the axis of the pipe at an angle of 90 degrees. Socket 1 twisting the nipple may be two positions of the holes 3 are open in the inner space of the socket mode of cryogenic liquids; 3 holes are blocked by a mode of submission of compressed gas under pressure from 10 to 100 atmospheres. Geometrical parameters (length and diameter) and the material of the pipe 4 choose from a condition minimize heat loss when charging the injector and the terms of the strength at the pressure up to 600 ATM.

5 has the shape of a cylinder with a cone-shaped bottoms. Form and geometrical parameters choose from a condition minimize heat loss and conditions strength when the pressure inside up to 600 atmospheres.

Output node includes the relief line 6 with the clutch 7 and flange 8 membrane 9, washer 10 and a nut 11. Geometrical parameters (length and diameter) and material waste pipeline 6 also choose from a condition minimize heat loss when charging the injector and the terms of the strength at the pressure up to 600 ATM. Clutch 7 discharge pipeline 6 optimise its length.

The main part of the output node is flange 8 membrane 9 and washer 10, which in the context shown in figure 2. The membrane is made in the form of a disk of thin foil, press a nut and washer 10 11 to the bottom flange.

By changing the aperture diameter washers 10 regulate the bursting pressure and therefore the speed of the expiration of the cryogenic liquid in a tank of water.

All parts of the injector insulated to minimize heat loss (figures not shown).

Injector works as follows.

First injector seasoned cryogenic liquid. For the filling injector cryogenic liquid socket 1 is set to position b) (3 holes and the hole axis injector open cryogenic fluid comes in ) so that the holes 3 are open in the inner space of the reducer 2. Injector lowered node input vertically down into a vessel with cryogenic liquid. Through the holes 3 and line 4 cryogenic liquid fills 5. With this method of filling cryogenic liquid is in the equilibrium state. After filling injector is taken out of the tank with a cryogenic liquid, socket 1 is set to the a - hole axis injector closed and cryogenic liquid through the - by tightening the socket 1 to the stop. Then put the membrane 9 flange 8, press its washer 10 with a hole and fix a nut 11. Then injector lower flange (8) in a container of water. Open the gate of a cylinder of compressed gas. As the helium gas is used. The gas is fed under pressure from 10 to 100 atmospheres. When the pressure in the injector 10-20 atmospheres is the destruction of the membrane and release of cryogenic liquid into the water. The destruction of the membranes leads to the discovery of the discharge pipeline and release (injection) jet cryogenic liquid into the water and to rapid overheating cryogenic liquid. The whole volume of overheated liquid explosively into steam. As a result of this explosive boiling-up of cryogenic liquids in water develops shock wave pressure up to 50 atmospheres.

Rationale industrial applicability.

Experimental investigations were carried out. Work area represented a vertical positioned thick-walled steel pipe and injector, mounted on the top of the pipe. Work area was filled with distilled water. Profiles of pressure waves in the water were measured by two piezoelectric pressure sensors T500-2 installed in a pipe. Sensor signals are fed to an analog-to-digital Converter (ADC E20-10) and further processed on the computer. The research was conducted in the presence of a free surface near the place of the input jet cryogenic fluid in distilled water. The measurement error was less than 1%.

At the entrance liquid water had explosive boiling, accompanied by a pressure jump. The results confirm the possibility of creating injector conditions necessary to intensify the process of hydrate formation.

1. Injector cryogenic liquid, including node input cryogenic liquid, and output node cryogenic liquid, characterized in that node input includes fitting with external thread, having the axis channel, capillary type of sensor connected with a cylinder of compressed gas, who served under pressure from 10 to 100 atmospheres, pipe transition thread on the inner surface for screw fitting and with through axisymmetric feed holes cryogenic liquid, located opposite each other on the same axis intersects the axis of the pipe at an angle of 90 degrees, and the nipple can have two positions: a) the holes are blocked and cryogenic liquid through the ; b) the holes are open and cryogenic fluid comes in , and a pipeline connecting node input having the form of a cylinder with a cone-shaped bottoms, output node includes relief pipeline with the clutch optimize length of the pipeline and flange with a membrane in the form of a disk of thin foil which is pinned to the outlet washer, internal diameter of which is selected depending on the magnitude of the pressure required to burst, and the presser nut.

2. Injector by p. 1, characterized in that the geometrical parameters of the pipelines, waste piping and choose from a condition of minimal heat loss and conditions strength when the pressure in the pipelines and up to 600 atmospheres.

3. Injector by p. 1, characterized in that all parts of the injector insulated.

4. Injector by p. 1, characterized in that, as a compressed gas using helium.

5. Injector by p. 1, characterized in that in the capacity of cryogenic fluid using liquid nitrogen.

6. Injector by p. 1, characterized in that in the capacity of cryogenic fluids used liquid methane.