JP3417794B2 - Screw type squeezing device - Google Patents

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 separating soybean milk and okara from soybean soup.

[0002]

2. Description of the Related Art A screw type squeezing device of this type is, for example, a tofu or soybean milk squeezing device for frying. FIG. 8: is a schematic block diagram which shows the natural filtration part of the conventional soybean milking apparatus. Conventionally, a natural filtration unit 1 of a soybean milking device has a rotary shaft 5 pierced and fixed to a cylindrical filtration screen 3 having openings at both ends so as to rotatably support both ends of the rotary shaft 5. An electric motor is used to rotate the filtration screen 3 via the rotary shaft 5. The filtration screen 3 is made of a mesh screen, and coaxial spiral blades 9 are provided in the inner circumference thereof. The filtration screen 3 is covered with a cover (not shown) without being sealed from the outside air. Opening 3a at one end of the filtering screen 3
Has a reduced diameter, and the bent supply port 11 is inserted into the inside of the filtration screen 3 from the outside through the reduced diameter opening 3a.

In the soybean milk squeezing apparatus having the natural filtration unit 1 constructed as described above, the procedure for squeezing soybean milk is as follows. First, soybeans soaked in water are mashed and water is added into the filtering screen 3 rotated by an electric motor. The so-called soybean soup 13 that has been boiled down is supplied from the supply port 11. The soybean soup supplied into the filtration screen 3 passes through the mesh screen and flows out to the outside of the filtration screen 3, and is separated into soymilk 15. On the other hand, the soybean milk liquid obtained by squeezing the soy milk is conveyed to the other end side (right side in FIG. 8) of the filtering screen 3 by the spiral blade 9 and further separated into a filtrate and okara in a dehydration unit (not shown).

[0004]

However, in the above-mentioned conventional soymilk squeezing apparatus, although the filtering screen 3 is covered with the cover, it does not have a closed structure.
There was a drawback that outside air entered and after a while, the surface of the screen was covered with yuba and became clogged, making it impossible to operate for a long time. Further, since the natural filtration unit 1 is in an open state, steam from the soybean soup leaks from the natural filtration unit 1 to the outside, which causes a problem of deteriorating the working environment. Then, since the supply port 11 was inserted from the opening 3a of the filtering screen 3, when the soybean soup was vigorously supplied by the supply pump, the soybean soup scattered in the filtering screen 3 passed through the opening 3a. There was a problem that soy milk was mixed with okara. Furthermore,
Since the bent supply port 11 is inserted from the opening 3a, there is a problem that the filtration screen 3 is difficult to remove when disassembling and cleaning the natural filtration unit 1 or during maintenance. The present invention has been made in view of the above situation, it is possible to operate for a long time by blocking the invasion of outside air, no steam is generated, and further, it is possible to prevent the addition of okara to soymilk and to decompose it. It is intended to provide a screw type squeezing device that can be easily washed.

[0005]

The structure of the screw type squeezing device according to the present invention for achieving the above object is such that a tank for storing a solid-liquid mixture and a rotatable cylindrical filtration screen are provided in a casing. A natural filtration unit that filters and separates a liquid from a solid-liquid mixture that is built in and supplied from the tank,
In a screw type squeezing device equipped with a dewatering unit for further squeezing the solid-liquid mixture sent from the natural filtration unit using a spiral screw, the solid-liquid mixture supplied from the tank is supplied from the tip. Supply nozzle to discharge
The natural filtration part is provided while penetrating in the center and integrally provided.
A flange that is detachably attached to the opening of the casing of
Having the flange attached to the casing
Der which is characterized in that said casing is a sealed structure, and was also used as the supply nozzle to the rotating shaft rotatably supporting the filtration screen Te Ru. Also, screw type squeezed apparatus, directly or may be provided with a bypass pipe for supplying the solid-liquid mixture from the tank to the dewatering unit. Further, a supply pipe for supplying the solid-liquid mixture from the tank and a cleaning pipe for connecting the solid matter outlet of the dehydration unit may be detachably provided. Alternatively, the screw type squeezing device is configured such that the solid matter outlet portion of the dehydration section is connected to one end of a sealable dehydration side casing forming the dehydration section, and the outlet end is covered with the outlet tube. A hood that is detachably fixed to the pipe and a pressing shaft that is fixed to one end side can slide the hood freely
A sliding lid provided with an opening / closing handle on the outside and movable in the hood toward and away from the opening end of the outlet pipe, and spring biased toward the opening end. The sliding lid may be provided between the outlet pipe and the outlet pipe so that the opening of the solids discharging interval for discharging the solids gradually increases as the sliding lid moves in the separating direction. preferable.

In this screw type squeezing device, the filtration screen is rotatably supported by the supply nozzle .
The removal of the flange makes it easier to remove the filtration screen, and the installation of the flange
This allows the solid-liquid mixture to be fed into a closed filtration screen without openings. Then, by sealing the natural filtration part, infiltration of outside air into the filtration side casing and outflow of steam from the inside of the filtration side casing to the outside are blocked. Further, by partially bypassing the solid-liquid mixture into the dehydration-side casing, the solid matter remaining in the dehydration-side casing is washed away, and the solid matter does not accumulate in the dehydration section. Further, since the solid material outlet is detachably provided with the cleaning pipe, the cleaning water supplied from the tank can be directly supplied to the solid material outlet, and the solid material outlet can be circulated and cleaned. In addition, the sliding lid has an external opening / closing hand.
Since it is equipped with a single
Easy to remove. Further, the sliding lid changes the opening degree of the solid material discharge interval formed between the sliding lid and the outlet tube according to the sliding amount of the sliding lid, so that the pressure adjustment in the dehydration section is easy. it can.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the screw type squeezing apparatus according to the present invention will be described in detail below with reference to the drawings. 1 is a front view of a screw type squeezing apparatus according to the present invention, FIG. 2 is a plan view of the screw type squeezing apparatus of FIG. 1, and FIG. 3 is an enlarged view of a natural filtration section and a dehydration section of the screw type squeezing apparatus shown in FIG. Sectional drawing, FIG. 4 is an enlarged sectional view of the supply nozzle section shown in FIG. 3, FIG. 5 is an enlarged sectional view of the Okara outlet section shown in FIG. 3, and FIG. 6 is a cleaning pipe at the Okara outlet section shown in FIG. It is an expanded sectional view of the state which connected. The screw type squeezing device 21 is roughly divided into a soybean soup tank 23, a supply pump 25, a natural filtration section 27, and a dehydration section 29.

The soybean soup manufactured in the previous step is sent from the connection port 31 and stored in the soybean soup tank 23. A supply pipe 33 is connected to the soybean soup tank 23, and the supply pipe 33 is connected to the natural filtration section 27 through a soybean soup inlet 35. The supply pipe 25 is provided with a supply pump 25,
The supply pump 25 supplies the soybean soup from the soybean soup tank 23 to the soybean soup inlet 3
Pump to 5.

The natural filtration portion 27 has a filtration side casing 39 formed of, for example, a cylindrical body that can be sealed. A soy milk outlet 40 is provided on the lower surface of the filtration side casing 39. A detachable flange 41 is attached to the opening on one end side of the filtration side casing 39. Flange 41
As shown in FIG. 4, by contacting the opening on one end side of the filtration side casing 39 through the gasket 43 and fastening the outer periphery with the clamp band 45, one end side of the filtration side casing 39 is closed by the closed structure. There is. The flange 41 can be easily removed by removing the clamp band 45, and the filtration side casing 3
It can be detached from 9. The supply nozzle 47 is integrally formed at the center of the flange 41 in the central axis direction of the filtration-side casing 39. Supply nozzle 47
Is connected to the soybean soup inlet 35 of the supply pipe 33 at one outer end. The other end of the supply nozzle 47 is opened inside the filtration side casing 39 with an opening 49 orthogonal to the central axis.

As shown in FIG. 3, a flange 51 is screwed into the opening on the other end side of the filtration side casing 39 by a bolt 53, and the flange 51 has a closed structure on the opening on the other end side of the filtration side casing 39. It is blocking. A screen rotary motor 55 is fixed to the outside of the flange 51, and a rotary shaft 57 of the screen rotary motor 55 penetrates the flange 51 at the same center as the supply nozzle 47, and the filtration side casing 39.
It projects inside. Sealing means 59 is provided between the rotary shaft 57 and the penetrating portion of the flange 51.
Reference numeral 9 seals between the rotary shaft 57 and the flange 51 rotatably. Further, at the tip of the rotating shaft 57, the rotating shaft 57
A locking shaft 61 protruding in a direction orthogonal to is fixedly provided.

A filtering screen 63 is built in the filtering casing 39. Screen 63 for filtration
Is composed of a cylindrical mesh screen (70 to 120 mesh), and coaxial spiral blades 65 are fixedly provided on the inner circumference. As shown in FIG. 4, a screen lid 67 is fixed to one end of the filtering screen 63. Screen lid 6
A through hole 69 is bored in the center of 7, and an annular bearing 71 is fixed in 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 project outward. The engaging arm 75 is the rotating shaft 5 described above.
It is adapted to engage with the locking shaft 61 of No. 7 so as not to rotate relative to each other.

Therefore, in the filtering screen 63, the bearing 71 is inserted into the supply nozzle 47 (see FIG. 4), and the engaging arm 75 is engaged 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 dehydrating section 29. The dewatering unit 29 has a dewatering side casing 79 formed of, for example, a cylindrical body that can be sealed. At the opening on the other end side of the dehydration side casing 79, a centrally opened flange 81 is fixedly provided. One end of the T-type connecting pipe 83 is screwed to the flange 81, and the branch pipe portion 83a of the T-type connecting pipe 83 is connected to the overflow outlet 77 described above.

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

A spiral screw 89 is built in the punching screen 85. Spiral screw 89
Is toward the one end side of the dehydration side casing 79,
The pitch of the spiral blade 89a is gradually narrowed. A screw bearing 91 is fixed to the outer side of the flange 87 of the dehydration-side casing 79. The spiral screw 89
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 pipe 83. A screw drive motor 93 is fixed to the other end of the T-type connecting pipe 83, and the rotation shaft of the screw drive motor 93 is connected to the central shaft 89b. A sealing means 95 is provided inside the T-type connecting tube 83, and the sealing means 95 rotatably seals between the central shaft 89b and the T-type connecting tube 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.
7 is connected to the soybean soup tank 23.

A solid matter outlet portion (outlet outlet portion) 101 is provided at one end of the dehydration side casing 79. As shown in FIG. 5, the Okara outlet 101 is provided with a dehydration side casing 79.
An outlet pipe 103 connected to one end of the outlet pipe, a hood 105 covering an open end of the outlet pipe 103 on one end side, and a sliding lid movable in the hood 105 toward and away from the open end of the outlet pipe 103. And 107.

The outlet pipe 103 has a reduced diameter at its open end and is provided with a locking projection 109 on its outer circumference. Hood 1
In 05, the inner circumference is inserted into the open end of the outlet pipe 103, and the locking portion 111 provided on the outer circumference is locked by the clamp 113.
By fixing it to 09, it is detachably fixed to the outlet pipe 103. An outlet 115 is formed on the lower surface of the hood 105, and the outlet 115 is located immediately below the opening of the outlet pipe 103.

In normal times, as shown in FIG. 5, the outlet pipe 103
The hood 105 and the sliding lid 107 are fixed to the hood 105, but when the apparatus is washed, the hood 105 and the sliding lid 107 are removed as shown in FIG.
14 is attached. Cleaning pipe 1
14 can be easily replaced by removing the clamp 113, integrally removing the hood 105 and the sliding lid 107, and then fixing the locking portion 114a of the cleaning pipe 114 to the locking projection 109 by the clamp 113. It can be done.

The sliding lid 107 is formed in a tubular shape with one end closed and the other end opened, and the inclination in the direction in which the overall length becomes shorter as the opening side of the other end goes downward (in FIG. 5). (See the broken line). Therefore, the sliding lid 1
Outlet pipe 1 formed by sliding 07
The opening amount of the Okara discharge gap between 03 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 projects 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 is provided on the outer periphery of the pressing shaft 117, one end of which contacts the inner wall of the hood 105 and the other end of which contacts the sliding lid 107. 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 thus constructed will be described. FIG. 7 is a circulation system diagram of the screw type squeezing device according to the present invention. The soybean soup heated in the previous step is sent to the soybean soup tank 23. The soybean soup is sent from the soybean soup inlet 35 to the supply nozzle 47 by the supply pump 25, and the filtration screen 63 of the natural filtration unit 27.
Is supplied in. The soy milk naturally filtered and separated by the filtering screen 63 is discharged to the outside from the soy milk outlet 40 of the filtration side casing 39.

The soybean soup 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, and T
It enters into the punching screen 85 of the dehydrating section 29 via the mold connecting pipe 83. The soybean soup that has entered the punching screen 85 is sent to the other end of the punching screen 85 by the drive of the spiral screw 89, further dehydrated and compressed by the spiral screw 89 whose pitch is gradually narrowed, and sent to the Okara outlet section 101. To be

In the punching screen 85, since the soybean soup is dehydrated and compressed, a part of the okara having a hole diameter or less passes through the punching screen 85 and the dehydration side casing 7
9 is returned to the soybean soup tank 23 through the filtrate return port 97, and is again supplied to the soybean soup inlet 35. In addition, a part of the soybean soup sent by the supply pump 25 is part of the bypass pipe 13
1 is introduced into the dehydration-side casing 79, passes through the dehydration-side casing 79, and is returned to the soybean soup tank 23. This prevents solid matters (mainly okara) from remaining in the dehydration-side casing 79.

The filtrate and okara returned to the soybean soup tank 23 are again sent to the natural filtration section 27 together with new soybean soup, and are sent under pressure to the okara outlet section 101 together with other okara at the dehydration section 29. On the other hand, the Okara pressure-fed to the Okara outlet 101 resists the urging force of the coil spring 121 and slides the lid 1.
07 in a direction away from the outlet pipe 103,
From the gap between the sliding lid 107 and the outlet pipe 103 formed by sliding 07, the outlet 1 of the hood 105
It is discharged from 15.

The Okara discharge gap between the sliding lid 107 and the outlet pipe 103 is formed so that the opening degree increases in proportion to the sliding amount of the sliding lid 107 in the direction away from the outlet pipe 103. , Spiral screw 8 at Okara exit 101
The squeezing action of 9 can be stabilized, and the reduction of the squeezing action of solid matter (mainly okara) due to the rapid decrease in the internal pressure of the screw press can be prevented. That is, the pressure adjustment in the dehydration section 29 is facilitated.

Next, the operation of the screw type squeezing device 21 at the time of 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 the cleaning pipe 114 is connected to the outlet pipe 103. The open / close valve 141 opened during production and cleaning, the open / close valve 143 closed during production and open during cleaning, and the open / close valve 145 opened during production and closed during cleaning are closed. After storing the cleaning water in the soybean soup tank 23, the supply pump 25 is driven to pump the cleaning water to the supply pipe 33.

As a result, the cleaning 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 the solid matters remaining at the respective portions are washed, Filtrate return port 97
And it will be discharged from the cleaning liquid outlet 147 to the soybean soup tank 23.

According to the screw type squeezing device 21 according to the above-mentioned embodiment, since the natural filtration portion 27 is completely sealed, the outside air does not enter, the internal humidity can be kept high, and the screen is dried. It is possible to prevent clogging. As a result, it is possible to enable continuous operation for a long time. Since no steam is generated, the working environment can be improved. At the same time, the scent of soy milk is not easily lost, so high-quality soy milk and tofu can be obtained. Since the soybean soup is supplied from the supply nozzle 47 that also serves as the rotating shaft, the filtration screen 63 can be easily removed, and the soybean milk does not jump out of the filtration screen 63, and okara does not mix with soymilk.

Conventionally, this type of squeezing apparatus has been used for squeezing fruits, separating wort in beer production, dewatering sludge in wastewater treatment facilities, etc., and clarifying the filtrate and dewatering the solid matter. Has been emphasized. Since it was diverted to the production of tofu and deep-fried tofu, no consideration was given to the destruction of the protein structure, and all the effort was to reduce the filtration pores as much as possible in order to improve the clarity and dehydration rate. as a result,
When soybean milk passes through minute pores, it undergoes severe physical action, destroys the protein network structure, and in the case of fried food it does not extend or the skin becomes bad, and in tofu, elasticity, water retention, binding There was a problem such as loss of sex. In the conventional squeezing apparatus of this type, since the pore diameter (diameter of about 0.05 to 0.3 mm) in the dehydration section is small, clogging with soybean fiber is likely to occur, and in order to prevent it, the punching screen 85 and The clearance accuracy between the spiral screw 89 and the scraper must be increased or a scraper must be attached. On the other hand, according to the above-mentioned screw type squeezing device 21, since the hole diameter of the punching screen 85 in the dehydration section 29 is made coarse, it is not clogged and is not subjected to a harsh physical action, which is most suitable for the production of tofu / fried oil. You can get soy milk. Further, since clogging is less likely to occur, it is not necessary to set the clearance precision between the punching screen 85 and the spiral screw 89 to be high.

In the dehydrating section 29, a part of the soybean soup is bypassed into the dehydrating side casing 79,
When the Okara that has passed through the punching screen 85 remains in the dehydration side casing 79, it can be washed away by using a part of the soybean soup supply, and the accumulation of Okara in the dehydration unit 29 can be prevented.

Further, since the screw type squeezing device 21 has a hermetically sealed structure as a whole, only by circulating the cleaning liquid, the filtering screen 63 and the punching screen 85 are provided.
And the like can be circulated for cleaning in a state of being immersed in cleaning water, and cleaning can be performed easily and reliably. Since the cleaning pipe 114 can be connected to the outlet pipe 103,
The cleaning liquid can not be circulated, and the Okara outlet portion 101, which has only a means for cleaning the remaining Okara by hand washing, can be easily performed by circulation cleaning.

[0031]

As described in detail above, according to the screw type squeezing device of the present invention, the feed nozzle is penetrated.
The attached flange is detachably installed in the casing of the natural filtration section.
In addition, since the filtration screen is rotatably supported by using the supply nozzle as a rotating shaft, the filtration screen can be easily removed during disassembly and cleaning and maintenance, and okara is not mixed into soymilk. can do. And since the natural filtration part is sealed,
There is no invasion of outside air or generation of steam, which enables continuous operation for a long time and improves the working environment. Moreover, since a part of the solid-liquid mixture is bypassed into the dehydration side casing, the solid matter remaining in the dehydration side casing can be washed away, and the accumulation of solid matter in the dehydration section can be prevented. Further, since the solid matter outlet is detachably provided with a cleaning pipe, the cleaning water supplied from the tank can be supplied to the solid matter outlet, and the solid matter outlet can be easily circulated for cleaning. Will be able to.

[Brief description of drawings]

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

2 is a plan view of the screw type squeezing device of FIG. 1. FIG.

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

FIG. 4 is an enlarged cross-sectional view of the supply nozzle section shown in FIG.

5 is an enlarged cross-sectional view of the Okara outlet shown in FIG.

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

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 showing a natural filtration section of a conventional soybean milking device.

[Explanation of symbols]

21 Screw-type squeezing device 23 Go liquid tank (tank) 27 Natural filtration section 29 Dehydration department 33 Supply piping 39 Filter side casing (casing) 47 supply nozzle 63 Screen for filtration 89 spiral screw 101 Okara outlet (solids outlet) 131 Bypass piping 114 Cleaning pipe

Continuation of the front page (56) Reference JP 62-208251 (JP, A) JP 9-10522 (JP, A) Actual opening 55-180394 (JP, U) Actual opening 7-15189 (JP , U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B30B 9/14 A23L 1/20 104 B01D 33/06

Claims (4)

(57) [Claims] 1. A casing 39 comprising a tank 23 for storing a solid-liquid mixture and a rotatable cylindrical filtration screen 63.
A natural filtration section 27 for filtering and separating a liquid from the solid-liquid mixture supplied from the tank 23 and contained in the tank 23, and the solid-liquid mixture sent from the natural filtration section 27 is further squeezed using a spiral screw 89. In a screw type squeezing device 21 including a dehydrating unit 29 for separating into solid matter, a supply nozzle 47 for discharging the solid-liquid mixture supplied from the tank 23 from the tip is integrally provided by penetrating in the center.
With the opening of the casing 39 of the natural filtration unit 27
The flange 41 is detachably provided,
The gage 41 is attached to the casing 39 and is attached to the casing.
Housing 39 has a sealed structure, and the supply nozzle 47 is provided.
The screw type squeezing device 2 characterized in that the filtering screen 63 is rotatably supported by also using as a rotating shaft.
1. 2. 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 dehydrating section 29. 3. A supply pipe 33 for supplying a solid-liquid mixture from the tank 23, and a solid matter outlet section 10 of the dehydration section 29.
The screw type squeezing device 2 according to claim 1, further comprising a cleaning pipe 114 that is detachably attached to the cleaning pipe 114.
1. 4. The solid matter outlet section 101 of the dehydration section 29.
And an outlet pipe 103 which is connected to one end of a dewaterable casing 79 capable of forming a dehydration portion 29, and the outlet pipe 1
03 that covers the open end of 03 and is detachably fixed to the outlet pipe 103, and is fixed to one end side.
The pressing shaft 117 slidably penetrates the hood 105.
And a sliding lid 107 that is movable in the hood 105 toward and away from the opening end of the outlet pipe 103 and is biased toward the opening end by a spring. The sliding lid 107 is provided between the outlet pipe 103 and the sliding lid 107 so that the opening of the solids discharging interval for discharging solids gradually increases as the sliding lid 107 moves in the separating direction. The screw-type squeezing device 21 according to claim 1, characterized in that.