JPS5888299A - Liquefied gas dripping device - Google Patents

Abstract

PURPOSE:To continuously feed liquid stably by feeding the liquid to a storing bath according to the liquefied gas level in the storing bath regardless of the internal pressure of a master tank. CONSTITUTION:When a storing bath 1 and a master tank 5 are connected to each other through a pipeline system 20, liquefied inert gas is flowed into the storing bath 1 by pressure of the master tank 5. When the liquid level in the storing bath 1 reaches a predetermined height, a bucket-type floating valve 15 is adapted to stop inflow of the liquefied gas, and after this the liquid level is kept regardless of a change in the internal pressure of the storing bath 1 which is lower than that of the master tank 5, so as to stably feed liquefied gas corresponding to the consumption automatically.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a liquefied inert gas D drip filling method in which a liquefied inert gas is dripped into a canned can immediately before seaming, and a predetermined internal pressure of υ is generated in the canned can after sealing. Regarding equipment.

Even for canned beverages and foods that do not contain carbon dioxide gas, it is desirable to use cans made of thin material as containers for beverages that contain carbon dioxide gas.

For this reason, attempts have been made to fill in liquefied inert gas dropwise just before the can is seamed to increase the internal pressure of the can after sealing, thereby compensating for the lack of strength of the can made of thin material. However, the amount of liquefied inert gas O to be dripped and sealed varies depending on the temperature of the can filling, the operating speed of the seaming device, the size of the upper space υ inside the can, etc.

The inert gas dripping device is equipped with a liquefied inert gas storage f1 and a dripping nozzle, and in order to accurately control the above-mentioned dropping, 7) Q-gas υ replenishment tυ control is required to the storage tank. becomes.

The most efficient method is to install a float in the liquefied gas storage tank.
It is conceivable that the vaporized gas in the tank is caused to flow away by vertical movement of the foot V to fluctuate the internal pressure, and the liquefied inert gas is caused to flow from the liquefied gas cylinder into the storage tank due to this pressure change.

However, it is difficult to prevent the liquefied gas flowing down from the dripping nozzle from being constantly affected by the pressure inside the D storage tank, so it is difficult to control the dripping with a complicated type D% dropping device. Become.

Liquefied gas 7:) iw lower t7) In order to make the control more precise, a liquid level needle is installed in the storage tank, and the liquefied gas replenishment amount is controlled by the solenoid valve, while the tank internal pressure cuff)
The main adjustment of the dripping amount is carried out according to Section 14, and the fine adjustment is made by the pulp attached to the dripping nozzle.
No. 6) Although this υ dropping device can precisely control the dropping t p *t+, it has the disadvantage that the control device is complicated and expensive.

This υ invention is a 7) device for dropping liquefied inert gas into a can immediately before sealing the liquefied inert gas υ.
A storage tank, a liquefied gas zero dripping valve that is opened and closed by a drive device, a nozzle plate that drips υ liquefied gas from the dripping pulp, a gas nozzle that releases the vaporized gas from the upper air of the upper storage tank through the internal pressure regulating pulp, and a gas nozzle that releases the vaporized gas from the original tank. I would like to use a liquefied gas dripping device that is composed of a packet-type float pulp that opens and closes the liquefied gas D supply port to the storage tank, and can precisely control the amount of dripping, although the control 11vc setting is simple. There is more to do.

A detailed explanation will be given below with reference to the drawings.

Figure 1 is a schematic diagram of the liquefied inert gas dripping cap 7), where 1 is a liquefied inert gas storage tank that is insulated with a heat insulating material (styrene foam, etc.), In order to adjust the amount of liquefied gas υ dropped by an electromagnetic drive device 2, a υ dropping pulp 3 and a nozzle plate 4 are provided. And this D storage tank 17) The inner surface is a liquefied inert gas zero source tank 5
During the initial liquid supply, the system suppresses rapid vaporization and pressure rise until the storage tank ID temperature drops sufficiently, stabilizes the tank internal pressure early, shortens liquid supply preparation time, and saves liquefied scum. To prevent this, apply a Teflon coat.

A dripping nozzle 6 for dripping liquefied gas is provided in the center of the nozzle plate 4D, and the entire body is made of resin (telephone is trademark Guiflon), so that frost does not adhere to the surface or the nozzle part freezes. ).

The vaporized gas from the storage cypress ID upper air passage 7D is guided through the discharge pipe system 8 to the nozzle plate 4υ outer circumference slK, and then to the gas nozzle 9.
The liquefied gas D is prevented from vaporizing and freezing by shielding the liquefied gas released and dripping with a low-temperature inert gas. On the other hand, vaporized gas is guided into the electromagnetic drive device 2 through the vaporized gas induction port 10 to cool the solenoid 11 and prevent burnout. Further, an internal pressure adjusting pulp 13 and a safety valve 14 are installed in the discharge pipe system 8 to adjust the internal pressure of the storage tank 1'7). Excess vaporized gas is guided from a separate pipe system (not shown) to the seamer seaming part and used as υ undercover gassing gas to reduce the amount of air sealed in the can.・D liquid supply part into the storage tank 1 is equipped with a packet-type float pulp 15, which automatically adjusts the opening amount of the valve υ according to the liquid level, and operates to keep the liquid level constant at all times, thereby stabilizing the liquid level. , continuous liquid supply is possible. In addition, the packet type float pulp 15 operates independently of changes in the pressure setting of the storage tank 1'Z), allowing the gas pressure in the storage tank 1 to be adjusted, which is effective in saving gas. In the figure, 16 is a heater for maintaining the internal pressure of the tank, and a machine control unit 11fjil that prevents the internal pressure of the storage tank 12) from falling below a set value.
17 is activated to heat the tank internal pressure maintenance heater and vaporize the liquefied gas. Internal pressure adjustment pulp 13 for stiff vaporized gas
is opened and released continuously to maintain the internal pressure of the reservoir tank 1'7) at the set value.

The former tank 5 has a freeze prevention heater 18 and the former tank 5.
'I) A υ pressure curve valve 19 is provided to set the internal pressure. 2o is a pipe system connecting the source tank 5 and the storage tank l.

The internal pressure 11Mjf pulp 13 is set according to the predetermined DH lower wrinkle, and the pressure 1111119f19 is set so that the internal pressure of the original tank 5D is higher than the internal pressure of the storage tank 17:1 determined thereby.
If the storage tank 1 and the source tank 5 are connected by the pipe line system 20 by setting , the liquefied inert gas flows into the storage tank 1 due to the pressure of the source tank 5υ.

When the liquid level in the storage tank l reaches a predetermined height, the packet type 7
0-Tovalp 15 stops the inflow of liquefied gas 7), and from then on the storage tank 17), which has a lower internal pressure than the original tank 5D, maintains the liquid level regardless of changes in internal pressure υ, and automatically supplies liquefied gas commensurate with consumption. Liquid is supplied.

Figure 2 is an enlarged view of the dripping pulp 3 and four nozzle plates, with 21 forming a dripping pulp 37) needle at the tip, the other end being a valve rod that connects Renoid IIK, and 22 a Teflon-coated block. The vaporized gas sent through the discharge pipe system 8 near the outer periphery of the block 227) is passed through the gas nozzle 9. A gas guide path 23 is provided to guide the gas to the
A storage chamber 24 in which one storage tank stores liquefied gas is provided in the center. 251.26 is made of resin (trademark if kept,
Diflon) 7) 0 ring, 27 is a Teflon or silicone aυ0 ring, 28 is a υ bolt for fixing the block 22 to the reservoir l, and 29 is a D bolt for fixing the gas nozzle product 30 to the block 22. A valve rod 21 is inserted into the center of the upper surface of the nozzle plate 4D, and a communication hole 4 for supplying liquid from the liquefied gas storage chamber 24 to the nozzle is arranged around a through hole 480 that acts as a guide when the valve is opened and closed.
9 are provided, and the liquid tIt flowing out from each communication hole collides with each other. = to weaken the flow velocity and flow down from the nozzle 6.

FIG. 3 shows a nozzle plate 4' of another embodiment, in which a threaded groove 32 is cut on the outer periphery of the lower end of the nozzle plate 4' for detachably attaching a pressure-eliminating nozzle 31 shown in FIG. There is. Above pressure elimination nozzle 31 Dripping nozzle 6
It is used to prevent the liquefied gas from colliding with the liquid surface in the can and scattering, causing variations in the amount of dripping, and is made of a sintered alloy. A threaded groove 34 is cut in the upper opening 33 of the pressure erasing nozzle 31 so as to be screwed into the threaded groove 32 of the nozzle plate 4'. The tapered part 35 of the pressure erasing nozzle 31 is made of sintered alloy with a hole diameter of 2 to 10 μm.
It is formed in the shape of a porous filter having liquid permeability, and an addition lead wire 36 is attached to the tip of the taper 35.

Figure 5 shows the control circuit A for dropping liquefied inert gas, 37
A can detection device detects passing cans and sends a detection signal. The signal detected by the can detection device 37, which is composed of a phototube, a proximity switch, etc., is differentiated by a differentiation circuit 38 and sent to a lip-flop circuit 39iC. The flip-flop circuit 39 is connected to the electromagnetic drive device 2 for operating the dropping pulp 3 and the counter 4υ, and is connected to the counter 4tlVi setting device 41, oscillator 42 and timer 43, respectively. 44 is a changeover switch for selecting continuous opening or intermittent opening of the dripping valve 30.

Liquefied gas '7) The dripping amount υ is adjusted by controlling the internal pressure of the storage tank ID at a constant level with the control device 17, setting the control circuit ADO regulator 41 at a predetermined time, and adjusting the opening time of the dropping pulp 3D O14. However, when using a high-speed line where the dropping pulp 3D response speed cannot follow (e.g. 600 cans/mi)
n or more) The edge application is performed by switching the control circuit A7) changeover switch 44 to continuous open and continuously opening the dripping pulp 3.

In this case, the dripping amount 7) is adjusted by controlling the internal pressure of the storage tank lυ and using the appropriate nozzle diameter O nozzle plate 4' and pressure elimination nozzle 31.
This is also done by accommodating. It is also possible to adjust the correct amount of liquefied gas 7) by backing up the measured value by 71° while measuring the internal pressure of the can filled with liquefied gas with the can internal pressure detector [45].

In order to stabilize the pressure inside the can, it is necessary to keep the amount of sealed liquefied gas constant;
It is difficult to prevent D from flowing down from the nozzle 6 at high speed and colliding with the contents in the can due to the pressure applied thereto. It is possible to eliminate the pressure by using the pressure elimination nozzle 31.

Since the flowing liquefied gas temporarily accumulates in the erasing nozzle 31, it is good for continuous l-down υv7h, but intermittent dropping 2) l
I can't say it's appropriate for the meeting.

Fig. 6% Fig. 7 shows a modification of the D nozzle 7) to reduce the flow velocity of the flowing liquefied gas. It is the same, but the nozzle 6υ is provided with an outlet 62 provided with an impingement l1i61 obliquely provided thereon. As a result, the liquefied gas flowing down the nozzle 6 collides with the collision surface 61 and loses kinetic energy, reducing the outflow speed.

In the alternative embodiment shown in Fig. 1iK7, the nozzle outlet has a nozzle pipe 71, which is eccentric to the whirling outflow lower 2 and is provided at the pupil, and the liquefied gas flowing down is once connected to the nozzle pipe 71. 727) After colliding with the upper end 7 and losing kinetic energy, it flows down the nozzle pipe 72. KoO
By lowering the flow rate, D@defeats when filling,
In order to make it possible to stabilize the filling amount, the υ invention has the above-mentioned simple configuration, and the liquid D supplied to the storage tank 1 is connected to the liquefied gas υ in the storage tank 10, regardless of the internal pressure of the original tank 5.
O performed by the level 71 allows continuous and stable liquid supply and also keeps the liquid level constant. Reservoir tank 17) By coating the inner surface with Teflon, a temporary insulation effect can be obtained, and the preparation time until the start can be shortened. Dripping valve and nozzle plate 4 and attachment I
By forming the Is product with resin, it is possible not only to prevent frost from adhering to the surfaces of the nozzle plate 4, etc., but also to prevent the nozzle holes from freezing. Since the structure is such that vaporized gas is guided and blown to the outer periphery of the nozzle plate 4υ, not only is there a cooling effect of the liquefied gas υ, but also frosting (freezing) can be prevented.

By installing a control circuit A that drips liquefied gas, it detects passing cans and automatically controls the dripping valve 3 for each can at 1'F, %lh.
The liquefied gas with adjusted drip pupil can be dripped into a can. By attaching the pressure erasing nozzle 31 to the nozzle plate 4', it is possible to prevent the liquefied gas D from the dripping nozzle 6 from colliding with the liquid surface in the can, thereby preventing the liquefied gas from colliding with the liquid surface in the can. By providing the heater 16 for maintaining tank internal pressure and the internal pressure PL light valve 13, the internal pressure υ in the storage tank 1 can be automatically maintained at a set value by the control device 17'. Electromagnetic evacuation device 2 for θ vaporized gas in the storage tank l
The electromagnetic coil can be cooled and burnout can be prevented by inducing the electromagnetic coil inward.

[Brief explanation of the drawing]

The first problem is this υ invented liquefied inert gas dripping brass position θl! A formula diagram, Fig. 2 is an enlarged sectional view of the invention P dripping valve and nozzle grating, etc., Fig. 3 is an enlarged sectional view of another example υ nozzle grating υ, and Fig. 4 is an enlarged sectional view of the pressure elimination nozzle D.
Figure 5 is a schematic diagram of the circuit υ for dropping liquefied gas, W
, 6 and 7 are enlarged sectional views of other embodiments of the drip nozzle. 1: Storage tank 2: Electromagnetic drive f2 position 3: 1lli lower pulp 4.4: Nozzle plate 5: Original tank 6: Dripping nozzle 7: Upper space 8: Discharge piping system 9: Gas nozzle 1o: Vaporized gas fermentation inlet 11: Solenoid 13
: Internal pressure adjustment valve 14: Safety valve 15: Packet type float valve 16: Heater for maintaining tank internal pressure 17: Control device 18: Freeze prevention heater 19: Pressure adjustment valve
20: Piping system 21: Valve rod 22 Niblock 23: Gas guiding path 2.4: Storage chamber 26: 0 ring 27: 0 ring 28: Bolt 29: Bolt 3o: Gas nozzle parts 31: Pressure elimination nozzle 32: Thread groove ・33:
Upper S opening 34: Thread groove 35: Taper part 36: Additive conductor 37: Can detection device @ 38: Subtraction circuit 39:
Flip-flop circuit 40: Gate controller 41: Setting device 42: Oscillator 43: Tie Y-44: Changeover switch
45: Can internal pressure detection device A: Control circuit 61: Liquefied gas collision surface 71: Nozzle pipe Tokuken developer Patent attorney Fumi Sato (and 1 others)
name) Figure 2? P:L Figure 8

Claims (1)

[Claims] <1) A device for dripping liquefied inert gas into a can immediately before seaming the can, the device comprising a liquefied inert gas storage tank and a liquefied inert gas reservoir for dripping the liquefied inert gas. An electromagnetic drive device driven by a control circuit, a dropping pulp and nozzle rate for regulating the amount of liquefied gas dripped by the electromagnetic drive device, and a vaporized gas in a reservoir provided on the outer periphery of the cough nozzle plate. A gas nozzle for discharging liquefied gas through a discharge pipe system, an internal pressure adjusting pulp provided in the discharge pipe system, and a 70-top valve for opening and closing a supply port for liquefied gas from a source tank to a storage tank. Characteristic liquefied gas dripping device. 2) Special feature 1: Teflon coating on the inner surface of the storage tank! FMII
The liquefied gas dripping device according to item 1. 3) Tokuken with a nozzle plate formed of w fat - blue sought range p liquefied gas dripping device as described in claim 1 4) Claim 1 as described in claim 1 a7) Liquefied gas dripping device in which a pressure erasing nozzle is attached to the nozzle plate Device. 5) A liquefied gas dripping device according to claim 1, wherein the storage tank is provided with a vaporized gas guide port. 6) A liquefied gas dripping device according to claim 1, wherein an internal pressure detection device is connected to a control circuit for dripping liquefied gas.