JPS61212269A - Liquid-injection apparatus for food extruder - Google Patents

Abstract

PURPOSE:To enable the continuous injection of even a small amount of water under high pressure, by supplying the liquid from a tank via an on-off valve and a metering pump to a water-injection pipe composed of a thick part acting as a liquid reservior and a thin part acting as a throttle and connected to the thick part in series. CONSTITUTION:The liquid-injection apparatus 41 is composed of the tank 32, the on-off valve 42, the metering pump 34, the water-injection pipe 43 and the check valve 35. The water-injection pipe 43 is composed of a thick part 44 having a relatively large diameter and acting as a liquid reservior and a thin part 45 functioning as a throttle. The high-pressure water discharged from the metering pump 34 is received in the thick part 44, throttled by the thin part 45 and sent through the check valve 35 continuously and uniformly to the nozzle 22.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of the Invention] The present invention relates to a liquid injection device for a food extrusion molding machine, and particularly to a liquid injection device that enables continuous and uniform injection of liquid.

For example, in a food extrusion molding machine for making sweets, etc., generally one or more shafts with a screw fitted into the barrel are arranged and these shafts are rotated. The screws are rotated while maintaining a gap, and in the case of multiple shafts, the screws are engaged or disengaged with each other to rotate while maintaining a slight gap between them and the inner wall of the barrel. In such a structure, starches such as corn starch and wheat, or food materials such as meat and fish are introduced into the barrel, crushed or crushed into fine pieces, and then crushed into granules or powder by pressurization and heating, and then refined. This was then extruded through small holes and molded into food products.

In this case, a combination of screw shapes for different purposes has been used as the screw, such as a screw shape mainly for the purpose of transportation and compression, a screw shape for the purpose of kneading, and a screw shape for promoting crushing. The ingredients are strongly pressed between these screws, the inner wall of the barrel, and multiple screws, and are then kneaded, crushed, heated and pressurized, and the ingredients are cooked, steamed, etc.
Processing of ka-no-dame is added. Important factors for promoting gelatinization of foodstuffs include the addition of water and heating to the foodstuffs.

When water is supplied to foodstuffs, the viscosity increases, and as the viscosity increases, the pressure increases, and in the case of heating, the temperature is expected to rise. In other words, when food is heated under pressure, the boiling point temperature increases by approximately 10°C for each atmospheric pressure.
Foods that normally boil at 100°C can now be heated to 100°C or higher, and water can be expected to serve as a heat transfer medium between foods, resulting in better heating effects.

Compared to natural starch (β starch), gelatinized starch (α starch) has a strong ability to swell with water and is easily affected by the action of digestive enzymes, giving it a so-called umami taste. If this α-starch is rapidly dehydrated and dried at high temperatures to a moisture content of 15% or less! Does not starch.

This flexible α-starch can be eaten immediately without heating by simply adding water or hot water, and is therefore widely used in dry plates, instant rice cakes, foods for infants, and the like. As described above, hydration is an important element in processing foodstuffs, that is, in promoting gelatinization of starch.

Unnecessary addition of water to foodstuffs during the production of dried α-starch as described above necessitates dehydration of excess moisture and heating and drying of excess foodstuffs, increasing costs. Therefore, the liquid injection device of the food extrusion molding machine needs to have a function to control the amount of water added to the food material. Furthermore, when processing foodstuffs using a food extrusion molding machine, it is necessary to control the appropriate temperature, pressure, and moisture content. The device also needs a high-pressure water addition function.

[Prior art]

Here, an example of a food extrusion molding machine equipped with a conventional liquid injection device will be described with reference to FIG. First, the food extrusion molding machine 11 has a plurality of barrels 13A, 113B, 13C...1 on the base 12.
3N is integrally installed, and the base 12 is installed inside it.
In the figure, a plurality of block IJs 3-15 for the purpose of various operations such as transfer or cross-connection are fitted onto the outer periphery of a shaft 14 that is rotated by a drive unit (not shown) provided on the right side in combination. . A hopper 16 for receiving food (not shown) is provided at the upper part of the right barrel 13A, and a fixed amount of food is supplied from a feeder 17 to the hopper 16. In addition, barrel 138113c...
13N has pressure resistance.

A plurality of heat exchangers 18B, 1 are provided on the outer periphery of the barrel after the second barrel 13B from the right to cool or heat the barrel.
8C...IgN is installed, and the temperature of each barrel is measured by the temperature sensor 19B installed on each barrel. 9C...l'?
It can be arbitrarily controlled using nitrogen and an automatic temperature controller (not shown). A die 21 having a small hole 20 is fixed to the end face of the barrel 13N at the tip.

A tank 32 serving as a water injection device 31 is opened at the top and stores water inside, and an on-off valve 33 and a metering pump 34 are inserted from the bottom surface thereof.
A check valve 35 is connected in series to the hole 22 opened to the seventh flange of the barrel 13A.

In order to mold food products in such a mechanism, the screw 15 is driven to rotate through the shaft 14 by a drive section, and the food material is introduced into the barrel 13 from the feeder 17 through the hopper 16. Introduced ingredients are Scree 15
Transferred by kneading, pressure crushing and heating from barrel 1
3A, 13B.

13c...13N, and during this time α processing is performed and extruded from the small hole 20 of the die 21. Ingredients in barrel 1
While moving through the three persons, water in the tank 32 is pressurized by the metering pump 34 and injected from the hole 22 of the barrel 13.

As metering pumps, gear pumps and piston pumps are usually used because the pressure inside the barrel is high depending on the water injection location, and when these pumps inject water under pressure, the discharge pressure and discharge water volume fluctuate as is well known. , that is, a pulsating flow phenomenon occurs.

In particular, when pouring a small amount of water, if the water is being poured intermittently and the food is extruded at 20 o'clock per hour and with 10% water added, the amount of water to be poured is 2 tons per hour, assuming that the specific gravity of dust water is 1 for 2 hours per hour. In other words, the amount of water injected is a minute amount of 0-56 cc per second, and with a piston pump or the like, liquid is discharged only during the compression process of the piston, resulting in intermittent water injection, making it impossible to continuously and uniformly inject the liquid into the food.

[Purpose of the invention]

The present invention has solved these drawbacks, and its purpose is to provide a water injection device for a food extrusion molding machine that makes it possible to continuously inject even a small amount of water under high pressure with little pulsation phenomenon. It is in.

[Key points of the invention]

The liquid injection device of the food extrusion molding machine according to the present invention is as follows.

A tank that stores liquid such as water, a metering pump that pressurizes and releases the liquid in the tank, an on-off valve that is connected in series to the metering pump to open and close the discharge of the liquid in the tank, and a downstream of the metering pump. The water injection pipe is characterized in that the water injection pipe is composed of a large pipe portion having a liquid reservoir function and a narrow pipe portion having a throttle function.

[Embodiments of the invention]

The present invention will be explained below with reference to FIG. 1 showing one embodiment. Since the food extrusion molding machine 11 has already been explained in FIG. 3, which is a conventional example, a new explanation will be omitted.

The liquid injection device 41 includes a tank 32 that stores liquid such as water inside, an on-off valve 42 that opens and closes the release of liquid from the tank 32 and has a throttle function to adjust the amount, and a metering valve that pressurizes and releases the liquid. It is composed of a pump 34, a water injection pipe 43 connected downstream thereof, and a reverse valve 35, and the check valve 35 is connected to the hole 22 of the barrel 13A of the food extruder 11. The water injection pipe 43 has a relatively large diameter large pipe part 44 that has a liquid reservoir function, and a 1m long pipe with an inner diameter of 0.7 mm or an inner diameter of 1 m for continuous and uniform water injection.
It consists of a thin tube part 45 having a length of 3 m (mm). A relief valve 46 is provided between the large pipe portion 44 on the discharge side of the metering pump 34 and the tank 32.

Although the on-off valve 42 is provided between the tank 32 and the metering pump 34, the on-off valve 42 is provided between the metering pump 34 and the large tube section 44, between the large tube section 44 and the thin tube section 45, or between the large tube section 44 and the thin tube section 45. and the check valve 35 or between the check valve 35 and the hole 2
It may be provided at any position between 2 and 2.

Next, the operation of the embodiment described above will be explained. First tank 32
to store liquids such as water. In this case, normally water is supplied directly to the water supply via a solenoid valve (not shown), and a fixed amount of water is stored by controlling the opening and closing of the solenoid valve with a liquid level control element (not shown).

Next, when the on-off valve 42 is opened and the metering pump 34 is operated, the water in the tank 32 flows out from the on-off valve 42, is pressurized by the metering pump 34, passes through the water injection pipe 43 and the check valve 35, and enters the barrel 13A. Water is poured. At this time, the metering pump 34
The high-pressure water discharged from the large pipe section 44 is received and stored in the large pipe section 44, and is then throttled by the narrow pipe section 45 so that it flows continuously and uniformly into the hole 22 through the check valve 35 without interruption. Furthermore, by adjusting the relief valve 46, the internal pressure of the large pipe section 44 can be set to an arbitrary constant pressure, so the amount of water injected can be variably adjusted by changing the internal pressure of the large pipe section 44. .

FIG. 2 shows the main parts of another embodiment of the present invention, and in the first embodiment described above, the liquid flow rate on-off valve 42 and
The adjustment was made using the 7-f valve 46, but in this example, the adjustment is made by replacing the thin tube section.

That is, the liquid injection device 51 connects the metering pump 34 from the tank 32.
For example, three thin tube portions 52A to 52C having different diameters or lengths or different diameters and lengths are connected in parallel downstream of the large tube portion 44 that follows this, and on-off valves 53A to 53C are connected downstream thereof, respectively. The downstream ends thereof are merged into one, and a check valve 35 is further connected downstream thereof.

Then, to adjust the amount of liquid injected, select one or more of the thin tube portions 52A to 52C, and select the on-off valve 53A downstream thereof.
When opening 53C to 53C, a wider adjustment than K is possible. IJ IJ-f valve 46 then serves to return excess liquid delivered from metering pump 34 to tank 32. The check valve 35 is not necessary if there is no risk of backflow, but is necessary if the pressure in the barrel 13A or the like is high. In the above explanation, water was used as an example of the liquid, but it goes without saying that syrups and other flavored liquids can also be injected.

〔Effect of the invention〕

As explained above, the liquid injection device for a food extrusion molding machine according to the present invention connects a tank storing liquid to a barrel of a food extrusion molding machine by arranging an on-off valve, a metering pump, and a water injection pipe in series. The water injection pipe has a large pipe section with a liquid reservoir function and a narrow pipe section with a throttle function connected in series.

Therefore, even if a pump whose discharge water pressure and discharge amount fluctuate is used as a metering pump, the high-pressure water discharged from the pump is stored in the large pipe section, and the liquid is continuously and uniformly supplied downstream from the small pipe section. This has the advantage of eliminating the need for intermittent liquid injection as in the prior art.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional side view of the present invention, FIG. 2 is a system diagram of essential parts in another embodiment of the present invention, and FIG. 3 is a partially sectional side view of a conventional example. 32...tank, 34...metering pump, 42...
...Opening/closing valve, 43...Water injection pipe. 44... Thick tube part, 45... Thin tube part. Applicant: Food Industry Extrusion Shoes Technology Research Association Procedural Amendment 'l''r Director General of the Office of Administrative Offices Mr. Manabu Ka 1
, =IV- Display Patent Application No. 1987-54871 24 Name of the Invention The liquid injection device 3 of the food extrusion molding machine is made into a liquid injection device 3. Relationship between and subject matter Patent applicant Food Industry Extra Roots I! / Shoes King Technology Research Association 4, Agent 6, χ・1 elephant drawing of the captured IF. , C.7, Contents of correction

Claims (1)

[Claims] a tank for storing a liquid such as water; a metering pump that pressurizes and discharges the liquid in the tank; an on-off valve connected in series to the metering pump to open and close the discharge of the liquid in the tank; A liquid injection device for a food extrusion molding machine comprising a water injection pipe connected downstream of a pump, characterized in that the water injection pipe consists of a large pipe portion having a liquid reservoir function and a narrow pipe portion having a squeezing function. Liquid injection device for extrusion molding machine.