JPH10296494A - Screw type squeezing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a screw type squeezing device capable of operating for a long time by shutting out the invasion of the outside air and moreover easily disassembling and washing without generating steam. SOLUTION: In the screw type squeezing device 21 provided with the tank 23 storing a solid and liquid mixing material, the natural filtering part 27 filtering and separating the liquid from the solid and liquid mixing material fed from the tank 23 integrated a rotatable and cylindrical filtering screen within a casing 39, and the dehydrating part 29 further separating the solid and liquid mixing material fed from the natural filtering part 27 into the squeezed and filtered liquid and solid using a spiral screw, the feeding nozzle discharging the solid and liquid mixing material fed from the tank 23 from the tip end is pierced into the casing 39 of the natural filtering part 27 and fixed. The filtering screw is rotatably supported by also using this feeding nozzle as the rotating shaft.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw-type squeezing device for separating a solid-liquid mixture, and is particularly suitable for use in separating sesame liquid into soymilk and okara.

[0002]

2. Description of the Related Art A screw-type squeezing device of this type includes, for example, a soymilk squeezing device for producing tofu and fried oil. FIG. 8 is a schematic configuration diagram showing a natural filtration unit of a conventional soy milking apparatus. Conventionally, a natural filtration unit 1 of a soy milking apparatus fixes a rotating shaft 5 to a cylindrical filtering screen 3 having both ends opened by penetrating the rotating shaft 5 in the center axis direction, and rotatably supports both ends of the rotating shaft 5. In addition, the filter screen 3 is rotated by the electric motor via the rotary shaft 5. The filtration screen 3 is made of a mesh screen, and has a coaxial spiral blade 9 provided on the inner periphery. The filtration screen 3 is covered with a cover (not shown) without being sealed from the outside air. Opening 3a at one end of filtration screen 3
The supply port 11 bent through the reduced-diameter opening 3a is inserted into the inside of the filtration screen 3 from the outside.

[0003] In the soymilk squeezing device having the natural filtration unit 1 as described above, the procedure for squeezing soymilk is as follows. First, crushed soybeans soaked in water are added to a filtration screen 3 rotated by an electric motor. The boiled so-called goose liquid 13 is supplied from the supply port 11. The goose liquid supplied into the filtration screen 3 passes through the mesh screen and flows out of the filtration screen 3 to be separated into soymilk 15. On the other hand, the soybean milk squeezed out is transported by the spiral blade 9 to the other end (the right side in FIG. 8) of the filtration screen 3 and further separated into filtrate and okara by a dehydration unit (not shown).

[0004]

However, in the above-mentioned conventional soybean milking apparatus, although the filtering screen 3 is covered with a cover, it does not have a closed structure.
There was a drawback that outside air invaded, and after a while, the screen surface became clogged with clogging, making it impossible to operate for a long time. In addition, since the natural filtration unit 1 is in the open state, there is a problem that steam from the goose liquid leaks from the natural filtration unit 1 to the outside, thereby deteriorating the working environment. And since the supply port 11 was inserted from the opening 3a of the filtration screen 3, when the supply liquid supplied vigorously by the supply pump, the liquid scattered in the filtration screen 3 would pass through the opening 3a. There was a problem that okara was mixed into the soy milk. Furthermore,
Since the supply port 11 bent from the opening 3a was inserted, there was a problem that it was difficult to remove the filtration screen 3 at the time of disassembly washing and maintenance of the natural filtration unit 1. The present invention has been made in view of the above circumstances, and by blocking the intrusion of outside air, it is possible to operate for a long time, no steam is generated, and furthermore, it is possible to prevent mixing of okara into soy milk and to disassemble it. It is an object of the present invention to provide a screw-type squeezing device that can be easily washed.

[0005]

To achieve the above object, a screw-type squeezing device according to the present invention comprises a tank for storing a solid-liquid mixture, and a rotatable cylindrical filtration screen in a casing. A natural filtration unit that filters and separates a liquid from the solid-liquid mixture supplied from the tank,
The screw-type squeezing device further includes a dewatering unit that squeezes the solid-liquid mixture sent from the natural filtration unit using a helical screw and separates the filtrate into solids. A supply nozzle for discharging is fixedly penetrated into the casing of the natural filtration unit, and the filtration screen is rotatably supported by using the supply nozzle also as a rotating shaft. In the screw-type squeezing device, it is preferable that the casing of the natural filtration unit is formed in a closed structure. The screw-type squeezing device may be provided with a bypass pipe for directly supplying a solid-liquid mixture from the tank to the dehydrating section. Further, a cleaning pipe for connecting a supply pipe for supplying a solid-liquid mixture from the tank and a solid substance outlet of the dewatering section may be provided detachably. Alternatively, the screw-type squeezing device includes an outlet pipe connecting the solid substance outlet of the dewatering section to one end of a sealable dewatering-side casing forming the dewatering section, and covering an open end of the outlet pipe and the outlet pipe. A hood removably fixed to the pipe, and a sliding lid movably movable toward and away from the opening end of the outlet pipe in the hood and spring-biased toward the opening end. The sliding lid is formed so as to be formed between the sliding pipe and the outlet pipe as the sliding lid moves in the separating direction, so that the opening of the solid discharge gap for discharging the solid is gradually increased. Is preferred.

In this screw-type squeezing device, the filtration screen is rotatably supported by the supply nozzle, so that the filtration screen can be easily removed and the solid-liquid mixture is introduced into the closed filtration screen having no opening. Can be supplied. Then, the natural filtration section is sealed, so that the infiltration of outside air into the filtration side casing and the outflow of steam from the inside of the filtration side casing to the outside are blocked.
Further, since a part of the solid-liquid mixture is bypassed into the dewatering-side casing, the solid matter remaining in the dewatering-side casing is washed away, and the solid matter does not accumulate in the dewatering unit. Furthermore, since the washing pipe is detachably provided at the solid matter outlet, the washing water supplied from the tank can be directly supplied to the solid matter outlet, and the solid matter outlet can be circulated and cleaned. Also, since the sliding lid changes the opening of the solid discharge gap formed between the sliding lid and the outlet pipe in accordance with the sliding amount of the sliding lid, pressure adjustment in the dewatering unit is easily performed. it can.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a screw-type squeezing device according to the present invention will be described below in detail with reference to the drawings. 1 is a front view of the screw-type squeezing device according to the present invention, FIG. 2 is a plan view of the screw-type squeezing device of FIG. 1, and FIG. 3 is an enlarged view of a natural filtration unit and a dewatering unit of the screw-type squeezing device shown in FIG. FIG. 4 is an enlarged sectional view of the supply nozzle portion shown in FIG. 3, FIG. 5 is an enlarged sectional view of the Okara outlet portion shown in FIG. 3, and FIG. 6 is a cleaning pipe at the Okara outlet portion shown in FIG. It is an expanded sectional view in the state which connected. The screw-type squeezing device 21 is roughly composed of a liquid tank 23, a supply pump 25, a natural filtration unit 27, and a dewatering unit 29.

[0008] In the liquid waste tank 23, the liquid waste produced in the previous step is sent from the connection port 31 and stored. A supply pipe 33 is connected to the waste liquid tank 23, and the supply pipe 33 is connected to the natural filtration unit 27 via a waste liquid inlet 35. The supply pipe 33 is provided with a supply pump 25,
The supply pump 25 feeds the liquid from the liquid tank 23 to the liquid inlet 3.
To 5

The natural filtration section 27 forms a filtration side casing 39 by a sealable, for example, cylindrical body. On the lower surface of the filtration side casing 39, a soymilk outlet 40 is provided. A detachable flange 41 is attached to an opening on one end side of the filtration side casing 39. Flange 41
As shown in FIG. 4, an end of the filtration side casing 39 is closed with a closed structure by abutting an opening on one end side of the filtration side casing 39 via a gasket 43 and fastening the outer periphery with a clamp band 45. I have. The flange 41 can be easily removed by removing the clamp band 45.
9 can be detached. At the center of the flange 41, the supply nozzle 47 is formed integrally with the filtration side casing 39 so as to pass through the supply nozzle 47 in the central axis direction. Supply nozzle 47
Is connected to the liquid end 35 of the supply pipe 33 at one end. The other end of the supply nozzle 47 opens inside the filtration side casing 39 with an opening 49 perpendicular to the central axis.

As shown in FIG. 3, a flange 51 is screwed to the opening at the other end of the filtration side casing 39 with a bolt 53. The flange 51 has a closed structure at the opening at the other end of the filtration side casing 39. I'm blocking. A screen rotation motor 55 is fixed to the outside of the flange 51, and a rotation shaft 57 of the screen rotation motor 55 passes through the flange 51 at the same center as the supply nozzle 47, and the filtration side casing 39.
It protrudes into. Sealing means 59 is provided between the rotating shaft 57 and the penetrating portion of the flange 51, and the sealing means 5
Numeral 9 seals the space between the rotating shaft 57 and the flange 51 so as to be freely rotatable. The tip of the rotating shaft 57 is provided with a rotating shaft 57.
An anchoring shaft 61 protruding in a direction perpendicular to the direction is fixedly provided.

A filtration screen 63 is built in the filtration casing 39. Screen 63 for filtration
Is composed of a cylindrical mesh screen (70 to 120 mesh), and a coaxial spiral blade 65 is fixed to the inner periphery. As shown in FIG. 4, a screen cover 67 is fixed to one end of the filtration screen 63. Screen lid 6
A through-hole 69 is formed in the center of 7, and an annular bearing 71 is fixed to the through-hole 69. On the other hand, as shown in FIG. 3, the other end of the filtering screen 63 is an opening 73, and an engaging arm 75 is arranged at the center of the opening 73 so as to protrude outward. The engagement arm 75 is connected to the rotation shaft 5 described above.
7 so as to engage with the locking shaft 61 so as not to rotate relatively.

Accordingly, the filtration screen 63 is formed by inserting the bearing 71 into the supply nozzle 47 (see FIG. 4) and engaging the engaging arm 75 with the locking shaft 61 (see FIG. 3). Both ends are rotatably supported in the casing 39.

As shown in FIG. 3, an overflow outlet 77 is provided at the other end of the filtration side casing 39, and the overflow outlet 77 is connected to the dewatering section 29. The dewatering unit 29 forms a dewatering-side casing 79 by a sealable, for example, cylindrical body. A flange 81 having a central opening is fixed to an opening on the other end side of the dewatering side casing 79. One end of a T-shaped connecting pipe 83 is screwed to the flange 81, and a branch pipe section 83a of the T-shaped connecting pipe 83 is connected to the overflow outlet 77 described above.

A cylindrical punching screen 85 is provided in the dewatering side casing 79. The punching screen 85 has a relatively large hole diameter (0.3 to 0.8 in diameter).
It is formed by a punching plate. A flange 87 having a central opening is fixed to an opening on one end side of the dewatering side casing 79. Punching screen 85
Has one end fixed to the flange 87 and the other end fixed to the flange 81 described above.

A helical screw 89 is built in the punching screen 85. Spiral screw 89
Goes toward one end of the dehydration-side casing 79,
The pitch of the spiral blade 89a is gradually narrowed. A screw bearing 91 is fixed to the outside of the flange 87 of the dewatering side casing 79. The spiral screw 89 is
One end of the central shaft 89b is rotatably supported by the screw bearing 91, and the other end of the central shaft 89b is rotatably supported by a bearing portion 83b provided at the other end of the T-shaped connecting tube 83. A screw drive motor 93 is fixed to the other end of the T-shaped connecting pipe 83, and a rotation shaft of the screw drive motor 93 is connected to a center shaft 89b. Note that a sealing means 95 is provided inside the T-shaped connecting pipe 83, and the sealing means 95 rotatably seals a space between the central shaft 89b and the T-shaped connecting pipe 83. Further, a filtrate return port 97 is provided on the lower surface side of the dehydration side casing 79, and the filtrate return port 9 is provided.
Reference numeral 7 is connected to the liquid tank 23.

At one end of the dewatering side casing 79, a solid material outlet (Okara outlet) 101 is provided. As shown in FIG. 5, the okara outlet portion 101 is
An outlet pipe 103 connected to one end of the outlet pipe 103, a hood 105 covering an open end on one end side of the outlet pipe 103, and a sliding lid movable within the hood 105 in a direction approaching to and away from the open end of the outlet pipe 103. 107.

The outlet tube 103 has a reduced diameter at the open end, and is provided with a locking projection 109 on its outer periphery. Food 1
Reference numeral 05 denotes an inner periphery inserted into the open end of the outlet pipe 103, and a retaining portion 111 provided on the outer periphery is engaged with the locking projection 1 by a clamp 113.
09, it is detachably fixed to the outlet tube 103. An outlet 115 is formed in the lower surface of the hood 105, and the outlet 115 is located immediately below the opening of the outlet pipe 103.

Normally, as shown in FIG.
The hood 105 and the sliding lid 107 are fixed to the tub 105. At the time of cleaning the apparatus, the hood 105 and the sliding lid 107 are removed as shown in FIG.
14 is attached. Cleaning piping 1
14 can be easily removed by removing the clamp 113, removing the hood 105 and the sliding lid 107 integrally, and then fixing the locking portion 114a of the cleaning pipe 114 to the locking projection 109 with the clamp 113. You can do it.

The sliding lid 107 is formed in a cylindrical shape having one end closed and the other end opened, and is inclined in such a direction that the overall length becomes shorter as the other end opens downward (see FIG. 5). (See the broken line). Therefore, the sliding lid 1
Outlet tube 1 formed by sliding 07
The opening of the okara discharge gap between the sliding lid 107 and the sliding lid 107 changes in proportion to the sliding amount of the sliding lid 107. A pressing shaft 117 is fixed to one end of the sliding lid 107, and the pressing shaft 117 slidably penetrates one end of the hood 105 and protrudes to the outside. An opening / closing handle 119 is provided at the tip of the pressing shaft 117 protruding to the outside. A coil spring 121 having one end abutting on the inner wall of the hood 105 and the other end abutting on the sliding lid 107 is provided on the outer periphery of the pressing shaft 117. The coil spring 121 connects the sliding lid 107 to the outlet pipe 103. Energize to the opening side.

Next, the operation of the screw-type squeezing device 21 configured as described above will be described. FIG. 7 is a circulation system diagram of the screw-type squeezing device according to the present invention. The goose liquid heated in the previous step is sent to the goose liquid tank 23. The garnish is sent from the garnish inlet 35 to the supply nozzle 47 by the supply pump 25 and is filtered by the filtration screen 63 of the natural filtration unit 27.
Supplied inside. The soymilk naturally filtered and separated by the filtration screen 63 is discharged to the outside from the soymilk outlet 40 of the filtration side casing 39.

The goose liquid whose water content has been reduced to some extent by natural filtration is sent to the overflow outlet 77 by the spiral blade 65 as the filtration screen 63 rotates,
It enters the punching screen 85 of the dewatering section 29 via the mold connecting pipe 83. The spinning solution that has entered the punching screen 85 is sent to the other end of the punching screen 85 by driving the spiral screw 89, further dehydrated and compressed by the spiral screw 89 having a gradually narrowing pitch, and sent to the Okara outlet 101. Can be

In the punching screen 85, the spinach is dehydrated and compressed, so that a portion of the okara having a diameter smaller than the hole diameter passes through the punching screen 85, and the dewatering-side casing 7.
9, is returned from the filtrate return port 97 to the go solution tank 23, and is supplied to the go solution inlet 35 again. Further, a part of the solution fed by the supply pump 25 is
The liquid is guided into the dewatering-side casing 79 via 1, passes through the dewatering-side casing 79, and is returned to the liquid waste tank 23. This prevents solid matter (mainly okara) from remaining in the dewatering-side casing 79.

The filtrate and okara returned to the garlic liquid tank 23 are sent again to the natural filtration section 27 together with new garlic liquid, and are sent to the okara outlet section 101 together with other okara by the dehydrating section 29. On the other hand, Okara pressure-fed to the Okara outlet portion 101 slides over the sliding lid 1 against the urging force of the coil spring 121.
07 in the direction away from the outlet tube 103,
07 through the gap between the sliding lid 107 and the outlet pipe 103 formed by the sliding of the outlet 1 of the hood 105.
It is discharged from 15.

The okara discharge gap between the sliding lid 107 and the outlet tube 103 is formed such that the opening increases in proportion to the sliding amount of the sliding lid 107 in the direction away from the outlet tube 103. Screw 8 at Okara outlet 101
9 can stabilize the squeezing action and prevent a decrease in the squeezing action of solids (mainly okara) due to a rapid decrease in the internal pressure of the screw press. That is, pressure adjustment in the dewatering unit 29 is facilitated.

Next, the operation of the screw-type squeezing device 21 during cleaning will be described. At the time of cleaning, the hood 105 and the sliding lid 107 attached to the outlet pipe 103 are removed, and a cleaning pipe 114 is connected to the outlet pipe 103. During production, the on-off valve 141 opened during cleaning is opened, the on-off valve 143 closed during production and opened during cleaning is opened, and the on-off valve 145 opened during production and closed during cleaning is closed. After the washing water is stored in the bottle solution tank 23, the supply pump 25 is driven to pump the washing water to the supply pipe 33.

As a result, the washing water from the supply pipe 33 is supplied to the dehydration side casing 79, the Okara outlet section 101, the supply nozzle 47, and the filtration side casing 39, and cleans the solid matter remaining in each part. Filtrate return port 97
Then, the liquid is discharged from the cleaning liquid outlet 147 to the liquid tank 23.

According to the screw-type squeezing device 21 according to the above-described embodiment, the natural filtration part 27 is completely sealed, so that the outside air does not enter, the inside humidity can be kept high, and the screen is dried. Clogging can be prevented. As a result, long-time continuous operation can be performed. Since no steam is generated, the working environment can be improved. At the same time, it is difficult to miss the aroma of soymilk, so that high-quality soymilk and tofu can be obtained. Since the goji liquid is supplied from the supply nozzle 47 serving also as the rotating shaft, the filtering screen 63 can be easily removed, and the goji liquid does not fly out of the filtering screen 63, so that okara does not mix into the soymilk.

Conventionally, this type of squeezing device has been used for fruit squeezing, separation of wort in beer production, dewatering of sludge in a wastewater treatment facility, etc., and clarification of filtrate and dehydration rate of solid matter. Has been considered important. Since it was used in the production of tofu and fried tofu, no consideration was given to destruction of the protein structure, and the filter pores were merely reduced as much as possible in order to improve clarity and dehydration rate. as a result,
When soy milk passes through microscopic pores, it undergoes severe physical action, destroying the protein network structure, and in the case of frying, it does not grow or has poor skin, and in tofu, elasticity, water retention, binding Problems such as loss of performance have occurred. In this type of conventional squeezing device, the pore diameter (about 0.05 to 0.3 mm in diameter) in the dewatering section is small, so that clogging with soybean fiber is likely to occur. Either the clearance accuracy with the spiral screw 89 must be increased or a scraper must be attached. On the other hand, according to the screw-type squeezing device 21 described above, since the hole diameter of the punching screen 85 in the dewatering section 29 is made coarse, there is no clogging, no severe physical action, and it is most suitable for the production of tofu and fried fish. Soy milk can be obtained. Further, since clogging is unlikely to occur, it is not necessary to set a high clearance accuracy between the punching screen 85 and the spiral screw 89.

In the dewatering section 29, a part of the garnish is bypassed into the dewatering-side casing 79.
When the okara that has passed through the punching screen 85 remains in the dewatering side casing 79, it can be washed away by using a part of the supplied liquid, and the accumulation of okara in the dewatering unit 29 can be prevented.

Furthermore, since the screw-type squeezing device 21 has a closed structure as a whole, the filtration screen 63 and the punching screen 85 can be formed simply by circulating the washing liquid.
And the like can be circulated and cleaned in a state of being immersed in cleaning water, so that cleaning can be performed easily and reliably. And since the cleaning pipe 114 can be connected to the outlet pipe 103, conventionally,
The Okara outlet 101, in which the cleaning liquid cannot be circulated and the only option is to wash the remaining Okara by hand washing, can be easily performed by circulation cleaning.

[0031]

As described above in detail, according to the screw-type squeezing device according to the present invention, the supply nozzle is also used as a rotating shaft and the filtration screen is rotatably supported, so that it can be used for disassembly cleaning and maintenance. At times, the filtration screen can be easily removed, and the contamination of soybean milk with okara can be prevented. And since the natural filtration part is sealed, there is no intrusion of outside air and no generation of steam,
Long-term continuous operation is possible, and the working environment can be improved. In addition, since a part of the solid-liquid mixture is bypassed into the dehydration-side casing, solids remaining in the dehydration-side casing can be washed away, and accumulation of solids in the dehydration section can be prevented. Furthermore, since the washing pipe is detachably provided at the outlet of the solid, the washing water supplied from the tank can be supplied to the outlet of the solid, and the outlet of the solid can be easily cleaned by circulation cleaning. Will be able to

[Brief description of the drawings]

FIG. 1 is a front view of a screw-type squeezing device according to the present invention.

FIG. 2 is a plan view of the screw-type squeezing device of FIG.

FIG. 3 is an enlarged sectional view of a natural filtration unit and a dewatering unit of the screw-type squeezing device shown in FIG.

FIG. 4 is an enlarged sectional view of a supply nozzle section shown in FIG.

FIG. 5 is an enlarged sectional view of an Okara outlet shown in FIG. 3;

FIG. 6 is an enlarged sectional view of an Okara outlet portion in a state where a cleaning pipe is connected to the outlet pipe shown in FIG. 3;

FIG. 7 is a circulation system diagram of the screw-type squeezing device according to the present invention.

FIG. 8 is a schematic configuration diagram illustrating a natural filtration unit of a conventional soy milking device.

[Explanation of symbols]

 21 Screw-type squeezing device 23 Liquid tank (tank) 27 Natural filtration unit 29 Dehydration unit 33 Supply pipe 39 Filtration side casing (Casing) 47 Supply nozzle 63 Filtration screen 89 Spiral screw 101 Okara outlet (Solid matter outlet) 131 Bypass piping 114 Cleaning piping

Claims (5)

[Claims] A casing (39) for storing a solid-liquid mixture and a rotatable cylindrical filtration screen (63).
A natural filtration unit 27 that filters and separates the liquid from the solid-liquid mixture supplied from the tank 23, and further squeezes the solid-liquid mixture sent from the natural filtration unit 27 using a spiral screw 89. In the screw-type squeezing device 21 provided with a dewatering unit 29 for separating into solids, a supply nozzle 47 for discharging the solid-liquid mixture supplied from the tank 23 from the tip into the casing 39 of the natural filtration unit 27. A screw-type squeezing device 21 characterized in that the filtration screen 63 is rotatably supported by using the supply nozzle 47 also as a rotation shaft. 2. The screw-type squeezing device 21 according to claim 1, wherein the casing 39 of the natural filtration unit 27 is formed in a closed structure. 3. The screw-type squeezing device 21 according to claim 1, further comprising a bypass pipe 131 for directly supplying the solid-liquid mixture from the tank 23 to the dewatering unit 29. 4. A supply pipe 33 for supplying a solid-liquid mixture from the tank 23 and a solid substance outlet 10 of the dehydrating section 29.
The screw-type squeezing device (2) according to claim 1, characterized in that a washing pipe (114) for connecting to the device (1) is detachably provided.
One. 5. The solid material outlet 101 of the dewatering unit 29.
An outlet pipe 103 connected to one end of a sealable dewatering-side casing 79 forming the dewatering section 29;
A hood 105 covering an open end of the hood 105 and detachably fixed to the outlet pipe 103;
And a sliding lid 107 which is movable toward and away from the opening end of the outlet pipe 103 and is spring-biased toward the opening end. The sliding lid 107 moves in the separating direction. 2. The screw type according to claim 1, wherein the opening is formed so as to gradually increase the solid material discharge gap formed between the outlet tube 103 and the solid material discharge hole. Squeezing device 21.