Process method and device for preparing tofu by using lactic acid bacteria

Abstract

The invention discloses a technological method and device for curdling tofu through lactic acid bacteria, and relates to the technical field of bean product processing, the device comprises a stirring tank, a feeding pipe is fixedly installed at the top of the stirring tank, a lactic acid bacteria box is fixedly installed at the top of the feeding pipe, and a discharging device is arranged at the bottom of the stirring tank; the soybean milk machine comprises a stirring tank and a stirring device, the stirring device is arranged in the stirring tank, and the stirring device comprises a motor, a reciprocating lead screw, a movable frame, an air pressure box, a hollow pipe, a one-way air valve, an L-shaped air inlet pipe, a sliding rod, a sliding plate, a fixed rod, a reset spring, a rack, a rotary disc and a turnover plate. And then fermented lactic acid bacteria are added into the lactic acid bacteria tank, and air is injected into the bottom of the stirring tank, so that the lactic acid bacteria and the soybean milk can be mixed more uniformly, the contact among the components is promoted, and each part can be fully fermented.

Description

Technical Field

[0001] The invention relates to the technical field of bean product processing, in particular to a process method and device for making tofu by using lactic acid bacteria. Background Art

[0002] Lactic acid bacteria-made tofu is made by pouring fermented lactic acid bacteria into soy milk, mixing it, and then pouring it into a mold to form tofu.

[0003] The patent with patent announcement number CN218166645U relates to a stirring mechanism for processing soy products, including a frame, on which a second drive device and a reducer are installed, the output shaft of the second drive device is connected to the input shaft of the reducer, a stirring drum is arranged on the frame, a discharge pipe connected to the stirring drum is arranged at the bottom of the stirring drum, a baffle plate is arranged at the connection between the discharge pipe and the stirring drum, the baffle plate is turned to connect or close the discharge pipe, the stirrer is rotatably connected to the stirring drum, and is connected to the output shaft of the reducer through the stirring shaft, the stirring frame is fixedly installed on the stirrer, and the liquid inlet pipe is arranged on the top of the frame. The patent has a reasonable design, which improves the soy milk stirring efficiency, reduces labor intensity, and improves the stirring effect.

[0004] In the above patent, the discharge pipe is connected or closed by turning the baffle plate, the agitator is rotatably connected in the mixing drum, connected to the output shaft of the reducer through the mixing shaft, the mixing frame is fixedly installed on the agitator, and the liquid inlet pipe is arranged on the top of the frame. However, during the mixing process, lactic acid bacteria and soy milk may settle at the bottom of the mixing tank, resulting in poor mixing effect and affecting the tofu production. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a process method and device for making tofu with lactic acid bacteria, which solves the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a device for making tofu with lactic acid bacteria, comprising: a stirring tank, a feeding pipe is fixedly installed on the top of the stirring tank, a lactic acid bacteria box is fixedly installed on the top of the feeding pipe, and a discharging device is arranged at the bottom of the stirring tank; a stirring device, a stirring device is arranged inside the stirring tank, and the stirring device comprises a motor, a reciprocating screw, a movable frame, an air pressure box, a hollow tube, a one-way air valve, an L-shaped air inlet pipe, a sliding rod, a sliding plate, a fixed rod, a reset spring, a rack, a turntable and a flip plate, firstly, soy milk is poured into the stirring tank through the feeding pipe, and the fermented lactic acid bacteria are added into the lactic acid bacteria box by starting the motor, and the reciprocating screw is driven to rotate by the rotation of the motor, and the rotation of the reciprocating screw will drive the stirring plate to rotate, the motor is fixedly installed on the top of the stirring tank, the reciprocating screw is fixedly installed on the output end of the motor, the stirring plate is arranged at the bottom of the reciprocating screw, and the movable frame is threadedly installed on the reciprocating screw. The circumferential surface of the multi-filament rod, the air pressure box is fixedly installed on the top of the inner wall of the stirring tank, the hollow tube is connected and installed at the bottom of the air pressure box, the one-way air valve is fixedly installed on the bottom of the hollow tube, the L-shaped air inlet pipe is connected and installed on the surface of the air pressure box, the fixed rod is fixedly installed on the inner wall of the air pressure box, the sliding plate is slidably installed on the circumferential surface of the fixed rod, one end of the return spring is fixedly installed on the top of the inner wall of the air pressure box, the other end of the return spring is fixedly installed on the top of the sliding plate, the sliding rod is fixedly installed on the bottom of the sliding plate, the rack is fixedly installed on the outer wall of the air pressure box, the turntable is rotatably installed on a side of the moving frame close to the rack, the circumferential surface of the turntable is provided with a gear block, the rack and the gear block surfaces are meshed, and the flip plate is fixedly installed on the surface of the turntable, and the sliding plate moves upward to allow the air inside the gas tank to enter the air pressure box through the L-shaped air inlet pipe. When the moving frame moves downward and disengages from the squeezing of the sliding rod, the return spring drives the sliding plate to move downward.

[0007] According to the above technical solution, a one-way valve is arranged inside the L-shaped air intake pipe, and the one-way valve is used to prevent air from flowing to the outside through the L-shaped air intake pipe. The sliding rod is arranged under the movable frame, and a gas tank is arranged on the top of the L-shaped air intake pipe.

[0008] According to the above technical solution, a scraping device for preventing the raw materials from adhering to the inner wall of the mixing tank is provided on the movable frame, and a feeding control device is provided on the scraping device. The scraping device includes an elastic telescopic rod and an arc-shaped scraper. The elastic telescopic rod is driven to move downward by the movable frame downward, and the downward movement of the elastic telescopic rod drives the arc-shaped scraper downward. The raw materials adhering to the inner wall of the mixing tank are scraped off by the downward movement of the arc-shaped scraper. The elastic telescopic rod is fixedly mounted on the surface of the movable frame, and the arc-shaped scraper is fixedly mounted on the free end of the elastic telescopic rod.

[0009] According to the above technical solution, a connecting plate is fixedly installed on the surface of the air pressure box, a long rod is fixedly installed on one side of the connecting plate close to the elastic telescopic rod, a rotating block is rotatably installed on the top of the long rod, a groove is opened inside the long rod, a limiting block is fixedly installed on the bottom of the rotating block, a protrusion is fixedly installed on one side of the long rod close to the reciprocating screw rod, and a connecting rod is fixedly installed on the free end of the elastic telescopic rod, and the elastic force of the elastic telescopic rod itself will drive the arc scraper to move away from the inner wall of the mixing tank, so that the arc scraper is separated from the inner wall of the mixing tank, preventing the movable frame from continuously contacting the inner wall of the mixing tank during the process of driving the arc scraper to move upward.

[0010] According to the above technical solution, a No. 1 torsion spring is arranged between the long rod and the rotating block, and the rotating block is reset by the No. 1 torsion spring, and the connecting rod is in contact with the surface of the long rod.

[0011] According to the above technical scheme, the feed control device includes a push rod, a sliding rod, a short rod, an L-shaped rod and a sealing plate. The connecting rod drives the free end of the elastic telescopic rod and the arc scraper to move toward the inner wall of the mixing tank. The arc scraper will drive the push rod to move toward the short rod, and the push rod will push the sliding rod to move away from the inner wall of the mixing tank. The push rod is fixedly installed on the top of the arc scraper, the sliding rod is slidably installed on the bottom of the feed pipe, the short rod is fixedly installed on the bottom of the sliding rod, the L-shaped rod is fixedly installed on the top of the sliding rod, and the sealing plate is fixedly installed on the end of the L-shaped rod away from the sliding rod.

[0012] According to the above technical solution, a spiral ring is fixedly installed on the top of the sealing plate, the spiral rod is rotatably installed on the bottom of the inner wall of the feed pipe, the spiral rod is rotatably installed on the bottom of the inner wall of the feed pipe, and a stirring blade is fixedly installed on the end of the spiral rod away from the bottom of the feed pipe. The movement of the sealing plate in the direction away from the inner wall of the stirring tank will drive the spiral ring to move in the direction away from the inner wall of the stirring tank. The movement of the spiral ring in the direction away from the inner wall of the stirring tank will push the spiral rod to rotate. The rotation of the spiral rod will drive the stirring blade to rotate, and the lactic acid bacteria inside the feed pipe are stirred by the rotation of the stirring blade.

[0013] According to the above technical solution, a No. 1 spring is arranged between the slide rod and the feed pipe, and the No. 1 spring drives the slide rod to reset, and the sealing plate contacts the surface of the feed port of the feed pipe.

[0014] A process for making tofu with lactic acid bacteria comprises the following steps: Step 1: first, pour the soybean milk into the stirring tank through the feeding pipe, start the motor, and then add the fermented lactic acid bacteria into the lactic acid bacteria box, and the reciprocating screw is driven by the rotation of the motor to rotate, and the reciprocating screw is driven by the rotation of the stirring plate to fully stir the lactic acid bacteria and soybean milk through the rotation of the stirring plate to make the raw materials mixed evenly; Step 2: The reciprocating screw rod is rotated to drive the moving frame to reciprocate upward. The moving frame moves upward to push the sliding rod upward. The sliding rod moves upward to push the sliding plate upward. The sliding plate moves upward to allow the air inside the gas tank to enter the air pressure box through the L-shaped air inlet pipe. When the moving frame moves downward to release the pressing of the sliding rod, the return spring drives the sliding plate to move downward. Step 3: The sliding plate moves downward to squeeze the air inside the air pressure box through the hollow tube and the one-way air valve into the bottom of the mixing tank. Injecting air into the bottom can help mix the lactic acid bacteria and soy milk more evenly, promote contact between the ingredients, and ensure that each part can be fully fermented; Step 4: As the movable frame moves downward, it drives the turntable downward, and the turntable drives the gear block downward. As the gear block moves downward, it is pushed by the rack, so that the turntable and the flip plate are driven to rotate during the downward movement. The soy milk settled under the stirring tank can be flipped upward by the rotation of the flip plate to prevent the soy milk from settling under the stirring tank, resulting in the lactic acid bacteria not being fully mixed with the soy milk, resulting in the tofu produced not meeting the quality standards, and causing a waste of resources.

[0015] The present invention provides a process and device for making tofu with lactic acid bacteria, which has the following beneficial effects: (1) The invention fully stirs the lactic acid bacteria and soy milk by rotating the stirring plate, so that the raw materials are mixed evenly. At the same time, the sliding plate moves downward to squeeze the air inside the air pressure box through the hollow tube and the one-way air valve into the bottom of the stirring tank. Injecting air into the bottom can help to mix the lactic acid bacteria and soy milk more evenly, promote the contact between the ingredients, and ensure that each part can be fully fermented. The soy milk settled at the bottom of the stirring tank can be flipped upward by rotating the flip plate, preventing the soy milk from settling at the bottom of the stirring tank, resulting in the lactic acid bacteria not being fully mixed with the soy milk, resulting in the tofu produced not meeting the quality standards, and causing waste of resources. (2) The invention scrapes off the raw materials adhering to the inner wall of the mixing tank by moving the arc scraper downward, preventing the raw materials from adhering to the inner wall of the mixing tank. The adhering soybean milk residue may become a breeding ground for bacteria, affecting the hygiene and safety of the product, especially during the fermentation process, which may cause the quality of the product to decline. The upward movement of the connecting rod will contact the convex block to generate vibration, and the vibration will shake off the adhering soybean milk to prevent it from affecting the subsequent scraping. At the same time, the connecting rod drives the free end of the elastic telescopic rod and the arc scraper to move toward the inner wall of the mixing tank, so that the arc scraper continues to scrape the inner wall when moving downward, preventing bacteria from growing and improving the quality of tofu production. (3) The invention allows soybean milk to contact with lactic acid bacteria at different stages by intermittently adding lactic acid bacteria, controlling the fermentation speed and avoiding excessive fermentation caused by adding too much at one time. At the same time, the lactic acid bacteria inside the feed pipe are stirred by the rotation of the stirring blade. Stirring can ensure that the lactic acid bacteria are evenly distributed in the liquid, so that they can fully contact the nutrients in the soybean milk during the fermentation process, improving the fermentation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the stirring tank of the present invention; Figure 4 It is a schematic diagram of the cross-sectional structure of the air pressure box of the present invention; Figure 5 This is a schematic diagram of the structure of the mobile frame and the turntable of the present invention; Figure 6 It is a schematic diagram of the cross-sectional structure of a long rod of the present invention; Figure 7 It is a schematic diagram of the cross-sectional structure of the feed pipe of the present invention.

[0017] In the figure: 1, stirring tank; 2, feeding pipe; 3, lactic acid bacteria box; 4, discharging device; 5, motor; 6, reciprocating screw; 7, moving frame; 8, air pressure box; 9, hollow tube; 10, one-way air valve; 11, L-shaped air inlet pipe; 12, sliding rod; 13, sliding plate; 14, fixed rod; 15, reset spring; 16, rack; 17, turntable; 18, flip plate; 191, elastic telescopic rod; 192, arc scraper; 193, connecting plate; 194, long rod; 195, rotating block; 196, limit block; 197, bump; 198, connecting rod; 201, push rod; 202, sliding rod; 203, short rod; 204, L-shaped rod; 205, sealing plate; 206, spiral ring; 207, spiral rod; 208, stirring fan blade. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-Figure 5, one embodiment of the present invention is: a device for making tofu with lactic acid bacteria, comprising: a stirring tank 1, a feeding pipe 2 is fixedly installed on the top of the stirring tank 1, a lactic acid bacteria box 3 is fixedly installed on the top of the feeding pipe 2, and a discharging device 4 is arranged at the bottom of the stirring tank 1; a stirring device, a stirring device is arranged inside the stirring tank 1, the stirring device comprises a motor 5, a reciprocating screw rod 6, a moving frame 7, an air pressure box 8, a hollow tube 9, a one-way air valve 10, an L-shaped air inlet pipe 11, a sliding rod 12, a sliding plate 13, a fixed rod 14, a reset spring 15, a rack 16, a turntable 17 and a flip plate 18, the lactic acid bacteria and the soybean milk are fully stirred by rotating the stirring plate to make the raw materials mixed evenly, the motor 5 is fixedly installed on the top of the stirring tank 1, the reciprocating screw rod 6 is fixedly installed on the output end of the motor 5, a stirring plate is arranged at the bottom of the reciprocating screw rod 6, the moving frame 7 is threadedly installed on the circumferential surface of the reciprocating screw rod 6, the air pressure box 8 is fixedly installed on the top of the inner wall of the stirring tank 1, and the hollow tube 9 is connected to the bottom of the air pressure box 8 The one-way air valve 10 is fixedly mounted on the bottom of the hollow tube 9, the L-shaped air inlet pipe 11 is connected and mounted on the surface of the air pressure box 8, the fixed rod 14 is fixedly mounted on the inner wall of the air pressure box 8, the sliding plate 13 is slidably mounted on the circumferential surface of the fixed rod 14, one end of the return spring 15 is fixedly mounted on the top of the inner wall of the air pressure box 8, the other end of the return spring 15 is fixedly mounted on the top of the sliding plate 13, the sliding rod 12 is fixedly mounted on the bottom of the sliding plate 13, the rack 16 is fixedly mounted on the outer wall of the air pressure box 8, the turntable 17 is rotatably mounted on a side of the mobile frame 7 close to the rack 16, the circumferential surface of the turntable 17 is provided with a tooth block, the rack 16 and the tooth block surface are meshed, and the flip plate 18 is fixedly mounted on the surface of the turntable 17. The downward movement of the sliding plate 13 will squeeze the air inside the air pressure box 8 through the hollow tube 9 and the one-way air valve 10 into the bottom of the mixing tank 1. Injecting air into the bottom can help mix the lactic acid bacteria and soy milk more evenly, promote contact between the ingredients, and ensure that each part can be fully fermented.

[0020] A one-way valve is arranged inside the L-shaped air inlet pipe 11 to prevent air from flowing to the outside through the L-shaped air inlet pipe 11. The sliding rod 12 is arranged below the movable frame 7, and a gas tank is arranged on the top of the L-shaped air inlet pipe 11.

[0021] A process for making tofu with lactic acid bacteria comprises the following steps: Step 1: first, pour soybean milk into the stirring tank 1 through the feeding pipe 2, and then add the fermented lactic acid bacteria into the lactic acid bacteria box 3 by starting the motor 5, and the reciprocating screw rod 6 is driven to rotate by the rotation of the motor 5, and the reciprocating screw rod 6 is driven to rotate by the rotation of the stirring plate, and the lactic acid bacteria and soybean milk are fully stirred by the rotation of the stirring plate to make the raw materials mixed evenly; Step 2: The reciprocating screw rod 6 rotates to drive the moving frame 7 to reciprocate upward, and the moving frame 7 moves upward to push the sliding rod 12 to move upward, and the sliding rod 12 moves upward to push the sliding plate 13 to move upward, and the sliding plate 13 moves upward to allow the air inside the gas tank to enter the air pressure box 8 through the L-shaped air inlet pipe 11. When the moving frame 7 moves downward to break away from the squeezing of the sliding rod 12, the return spring 15 drives the sliding plate 13 to move downward; Step 3: The sliding plate 13 moves downward to squeeze the air inside the air pressure box 8 into the bottom of the mixing tank 1 through the hollow tube 9 and the one-way air valve 10. Injecting air into the bottom can help mix the lactic acid bacteria and soy milk more evenly, promote contact between the ingredients, and ensure that each part can be fully fermented; Step 4: The movable frame 7 moves downward, driving the turntable 17 downward. The turntable 17 drives the gear block downward. The gear block is pushed by the rack 16 during the downward movement, driving the turntable 17 and the flip plate 18 to rotate. The flip plate 18 can be rotated to flip the soy milk settled under the stirring tank 1 upward to prevent the soy milk from settling under the stirring tank 1, resulting in the lactic acid bacteria not being fully mixed with the soy milk, resulting in the tofu produced not meeting the quality standards, and causing a waste of resources.

[0022] When the present embodiment is working, firstly, the soybean milk is poured into the stirring tank 1 through the feeding pipe 2, and the fermented lactic acid bacteria are added into the lactic acid bacteria box 3 by starting the motor 5, and the reciprocating screw rod 6 is driven to rotate by the rotation of the motor 5, and the rotation of the reciprocating screw rod 6 will drive the stirring plate to rotate, and the lactic acid bacteria and soybean milk are fully stirred by the rotation of the stirring plate to make the raw materials mixed evenly. At the same time, the rotation of the reciprocating screw rod 6 will drive the movable frame 7 to reciprocate upward, and the upward movement of the movable frame 7 will push the sliding rod 12 to move upward, and the upward movement of the sliding rod 12 will push the sliding plate 13 to move upward, and the air inside the gas cylinder will enter the air pressure box 8 through the L-shaped air inlet pipe 11 through the upward movement of the sliding plate 13, and when the movable frame 7 moves downward to disengage from the squeezing of the sliding rod 12, the return spring 15 will drive the sliding plate 13 to move downward, The downward movement of the sliding plate 13 will squeeze the air inside the air pressure box 8 into the bottom of the stirring tank 1 through the hollow tube 9 and the one-way air valve 10. Injecting air into the bottom can help mix the lactic acid bacteria and soy milk more evenly, promote the contact between the ingredients, and ensure that each part can be fully fermented. At the same time, the movable frame 7 will drive the turntable 17 to move downward during the downward movement, and the downward movement of the turntable 17 will drive the gear block to move downward. The gear block will be pushed by the rack 16 during the downward movement, so that the turntable 17 and the flip plate 18 will be driven to rotate during the downward movement of the gear block. The soy milk settled at the bottom of the stirring tank 1 can be flipped upward by rotating the flip plate 18 to prevent the soy milk from settling at the bottom of the stirring tank 1, resulting in the lactic acid bacteria failing to be fully mixed with the soy milk, resulting in the tofu produced not meeting the quality standards, and causing a waste of resources.

[0023] See also Figure 1-Figure 7 On the basis of the above embodiment, in another embodiment of the present invention, a scraping device for preventing the raw material from adhering to the inner wall of the stirring tank 1 is provided on the movable frame 7, and a feeding control device is provided on the scraping device. The scraping device includes an elastic telescopic rod 191 and an arc scraper 192. The elastic telescopic rod 191 is fixedly mounted on the surface of the movable frame 7, and the arc scraper 192 is fixedly mounted on the free end of the elastic telescopic rod 191 to prevent the raw material from adhering to the inner wall of the stirring tank 1. The adhering soy milk residue may become a breeding ground for bacteria, affecting the hygiene and safety of the product, especially during the fermentation process, which may cause the quality of the product to decline.

[0024] A connecting plate 193 is fixedly installed on the surface of the air pressure box 8, a long rod 194 is fixedly installed on one side of the connecting plate 193 close to the elastic telescopic rod 191, a rotating block 195 is rotatably installed on the top of the long rod 194, a groove is provided inside the long rod 194, a limiting block 196 is fixedly installed on the bottom of the rotating block 195, a protrusion 197 is fixedly installed on one side of the long rod 194 close to the reciprocating screw rod 6, a connecting rod 198 is fixedly installed on the free end of the elastic telescopic rod 191, and the connecting rod 198 moves upward and contacts with the protrusion 197 to generate vibration, and the attached soy milk is shaken off by the vibration to prevent it from affecting subsequent scraping.

[0025] A torsion spring No. 1 is arranged between the long rod 194 and the rotating block 195 , and the rotating block 195 is driven to reset by the torsion spring No. 1, and the connecting rod 198 is in contact with the surface of the long rod 194 .

[0026] The feed control device includes a push rod 201, a slide rod 202, a short rod 203, an L-shaped rod 204 and a sealing plate 205. The push rod 201 is fixedly installed on the top of the arc scraper 192, the slide rod 202 is slidably installed at the bottom of the feed pipe 2, the short rod 203 is fixedly installed at the bottom of the slide rod 202, the L-shaped rod 204 is fixedly installed on the top of the slide rod 202, and the sealing plate 205 is fixedly installed at one end of the L-shaped rod 204 away from the slide rod 202. By intermittently adding lactic acid bacteria, soy milk can be in contact with lactic acid bacteria at different stages, so as to control the fermentation speed and avoid excessive fermentation due to excessive addition at one time.

[0027] A spiral ring 206 is fixedly installed on the top of the sealing plate 205, and a spiral rod 207 is rotatably installed on the bottom of the inner wall of the feeding tube 2. The spiral rod 207 is threadedly installed on the inner wall of the spiral ring 206. A stirring fan blade 208 is fixedly installed on the end of the spiral rod 207 away from the bottom of the feeding tube 2. Stirring can ensure that the lactic acid bacteria are evenly distributed in the liquid, so that they can fully contact the nutrients in the soy milk during the fermentation process, thereby improving the fermentation effect.

[0028] A No. 1 spring is arranged between the slide bar 202 and the feed pipe 2 , and the No. 1 spring drives the slide bar 202 to reset, and the sealing plate 205 contacts the surface of the feed port of the feed pipe 2 .

[0029] The downward movement of the movable frame 7 drives the elastic telescopic rod 191 to move downward, and the downward movement of the elastic telescopic rod 191 drives the arc scraper 192 to move downward. The downward movement of the arc scraper 192 scrapes off the raw materials attached to the inner wall of the mixing tank 1 to prevent the raw materials from adhering to the inner wall of the mixing tank 1. The attached soybean milk residue may become a breeding ground for bacteria, affecting the sanitation and safety of the product, especially during the fermentation process, which may cause the quality of the product to decline. At the same time, the downward movement of the elastic telescopic rod 191 drives the connecting rod 198 to move downward, and the connecting rod 198 moves downward along the surface of the long rod 194. When the connecting rod 198 is separated from the long rod 194, the elastic force of the elastic telescopic rod 191 itself drives the arc scraper 192 to move away from the inner wall of the mixing tank 1, so that the arc scraper 192 is separated from the inner wall of the mixing tank 1, and the movable frame 7 drives the arc scraper 192 to move upward. The process of continuous contact with the inner wall of the mixing tank 1 causes The arc scraper 192 smears the attached soy milk onto the inner wall of the stirring tank 1, affecting the scraping effect and preventing the stirring tank 1 from being scraped for a long time, which can increase the service life of the arc scraper 192. When the connecting rod 198 moves upward, it will contact the protrusion 197 to generate vibration, and the vibration will shake off the attached soy milk to prevent affecting subsequent scraping. At the same time, the connecting rod 198 will contact the rotating block 195 during the upward movement, and the connecting rod 198 will push the rotating block 195 to rotate upward. When the connecting rod 198 is disengaged from the rotating block 195, the No. 1 torsion spring will drive the rotating block 195 to reset. At the same time, when the connecting rod 198 moves downward, the rotating block 195 will be restricted by the limit block 196, so that the connecting rod 198 drives the free end of the elastic telescopic rod 191 and the arc scraper 192 to move towards the inner wall of the stirring tank 1, so that the arc scraper 192 continues to scrape the inner wall when moving downward, thereby preventing bacteria from breeding and improving the quality of tofu making.

[0030] The free end of the elastic telescopic rod 191 and the arc scraper 192 are driven by the connecting rod 198 to move toward the inner wall of the mixing tank 1, and the arc scraper 192 will drive the push rod 201 to move toward the short rod 203, and the push rod 201 will push the slide bar 202 to move away from the inner wall of the mixing tank 1. The movement of the slide bar 202 away from the inner wall of the mixing tank 1 will drive the L-shaped rod 204 and the sealing plate 205 to move away from the inner wall of the mixing tank 1. The movement of the sealing plate 205 away from the inner wall of the mixing tank 1 will break away from the seal of the feed pipe 2, so that the lactic acid bacteria flow out from the discharge port. When the arc scraper 192 drives the push rod 201 to move downward, the short rod 203 and the slide bar 202 lose the squeeze of the push rod 201 and will reset under the elastic force of the No. 1 spring, and the mixture will be re-engaged. The sealing plate 205 will drive the sealing plate 205 to re-seal the feed port. By intermittently adding lactic acid bacteria, the soy milk can be in contact with the lactic acid bacteria at different stages, and the fermentation speed can be controlled to avoid too fast or too slow fermentation caused by adding too much at one time. At the same time, the sealing plate 205 moves away from the inner wall of the stirring tank 1, which drives the spiral ring 206 to move away from the inner wall of the stirring tank 1. The movement of the spiral ring 206 away from the inner wall of the stirring tank 1 will push the screw rod 207 to rotate. The rotation of the screw rod 207 will drive the stirring blade 208 to rotate. The lactic acid bacteria inside the feeding pipe 2 are stirred by the rotation of the stirring blade 208. Stirring can ensure that the lactic acid bacteria are evenly distributed in the liquid, so that they can fully contact the nutrients in the soy milk during the fermentation process, thereby improving the fermentation effect.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A process for making tofu with lactic acid bacteria, comprising the following steps: Step 1: first, pour soybean milk into the stirring tank (1) through the feeding pipe (2), and then add fermented lactic acid bacteria into the lactic acid bacteria box (3) by starting the motor (5). The reciprocating screw rod (6) is driven to rotate by the rotation of the motor (5), and the rotation of the reciprocating screw rod (6) drives the stirring plate to rotate. The lactic acid bacteria and soybean milk are fully stirred by the rotation of the stirring plate, so that the raw materials are mixed evenly; Step 2: The reciprocating screw (6) is rotated to drive the movable frame (7) to reciprocate upward, the movable frame (7) moves upward to push the sliding rod (12) to move upward, the sliding rod (12) moves upward to push the sliding plate (13) to move upward, and the sliding plate (13) moves upward to allow the air inside the gas tank to enter the air pressure box (8) through the L-shaped air inlet pipe (11), when the movable frame (7) moves downward to be free from the compression of the sliding rod (12), the return spring (15) drives the sliding plate (13) to move downward; Step 3: The sliding plate (13) moves downward to squeeze the air inside the air pressure box (8) through the hollow tube (9) and the one-way air valve (10) into the bottom of the mixing tank (1). Injecting air into the bottom can help to mix the lactic acid bacteria and soy milk more evenly, promote contact between the ingredients, and ensure that each part can be fully fermented; Step 4: The movable frame (7) moves downward, driving the turntable (17) to move downward. The turntable (17) moves downward, driving the gear block to move downward. The gear block is pushed by the rack (16) during the downward movement, so that the turntable (17) and the flip plate (18) are driven to rotate during the downward movement of the gear block. The soy milk deposited under the stirring tank (1) can be flipped upward by the rotation of the flip plate (18), thereby preventing the soy milk from being deposited under the stirring tank (1), resulting in the lactic acid bacteria not being fully mixed with the soy milk, resulting in the tofu produced not meeting the quality standards, and causing a waste of resources.

2. The lactic acid bacteria tofu making device used in the process for making tofu with lactic acid bacteria according to claim 1 is characterized in that: include: A stirring tank (1), wherein a feeding pipe (2) is fixedly mounted on the top of the stirring tank (1), a lactic acid bacteria box (3) is fixedly mounted on the top of the feeding pipe (2), and a discharging device (4) is arranged at the bottom of the stirring tank (1); A stirring device, wherein the stirring tank (1) is provided with a stirring device, the stirring device comprising a motor (5), a reciprocating screw (6), a movable frame (7), an air pressure box (8), a hollow tube (9), a one-way air valve (10), an L-shaped air inlet pipe (11), a sliding rod (12), a sliding plate (13), a fixed rod (14), a return spring (15), a rack (16), a turntable (17) and a flip plate (18), wherein the motor (5) is fixedly mounted on the top of the stirring tank (1), the reciprocating screw (6) is fixedly mounted on the output end of the motor (5), a stirring plate is arranged at the bottom of the reciprocating screw (6), the movable frame (7) is threadedly mounted on the circumferential surface of the reciprocating screw (6), the air pressure box (8) is fixedly mounted on the top of the inner wall of the stirring tank (1), the hollow tube (9) is connected and mounted on the bottom of the air pressure box (8), and the one-way air valve (18) is provided. 0) is fixedly mounted on the bottom of the hollow tube (9), the L-shaped air inlet pipe (11) is connected and mounted on the surface of the air pressure box (8), the fixed rod (14) is fixedly mounted on the inner wall of the air pressure box (8), the sliding plate (13) is slidably mounted on the circumferential surface of the fixed rod (14), one end of the return spring (15) is fixedly mounted on the top of the inner wall of the air pressure box (8), the other end of the return spring (15) is fixedly mounted on the top of the sliding plate (13), the sliding rod (12) is fixedly mounted on the bottom of the sliding plate (13), the rack (16) is fixedly mounted on the outer wall of the air pressure box (8), the turntable (17) is rotatably mounted on a side of the mobile frame (7) close to the rack (16), the circumferential surface of the turntable (17) is provided with a tooth block, the rack (16) and the tooth block surface are meshed, and the flip plate (18) is fixedly mounted on the surface of the turntable (17); Wherein, the movable frame (7) is provided with a scraping device for preventing the raw materials from adhering to the inner wall of the stirring tank (1), and the scraping device is provided with a feeding control device.

3. The device for making tofu with lactic acid bacteria according to claim 2, characterized in that: A one-way valve is arranged inside the L-shaped air intake pipe (11), the sliding rod (12) is arranged below the movable frame (7), and a gas tank is arranged on the top of the L-shaped air intake pipe (11).

4. The device for making tofu with lactic acid bacteria according to claim 3, characterized in that: The scraping device comprises an elastic telescopic rod (191) and an arc-shaped scraper (192); the elastic telescopic rod (191) is fixedly mounted on the surface of the moving frame (7); and the arc-shaped scraper (192) is fixedly mounted on the free end of the elastic telescopic rod (191).

5. The device for making tofu with lactic acid bacteria according to claim 4, characterized in that: A connecting plate (193) is fixedly mounted on the surface of the air pressure box (8); a long rod (194) is fixedly mounted on a side of the connecting plate (193) close to the elastic telescopic rod (191); a rotating block (195) is rotatably mounted on the top of the long rod (194); a groove is provided inside the long rod (194); a limit block (196) is fixedly mounted on the bottom of the rotating block (195); a protrusion (197) is fixedly mounted on a side of the long rod (194) close to the reciprocating screw rod (6); and a connecting rod (198) is fixedly mounted on the free end of the elastic telescopic rod (191).

6. The device for making tofu with lactic acid bacteria according to claim 5, characterized in that: A first torsion spring is provided between the long rod (194) and the rotating block (195), and the connecting rod (198) is in surface contact with the long rod (194).

7. The device for making tofu with lactic acid bacteria according to claim 6, characterized in that: The feed control device comprises a push rod (201), a slide rod (202), a short rod (203), an L-shaped rod (204) and a sealing plate (205); the push rod (201) is fixedly mounted on the top of the arc-shaped scraper (192); the slide rod (202) is slidably mounted on the bottom of the feed pipe (2); the short rod (203) is fixedly mounted on the bottom of the slide rod (202); the L-shaped rod (204) is fixedly mounted on the top of the slide rod (202); and the sealing plate (205) is fixedly mounted on one end of the L-shaped rod (204) away from the slide rod (202).

8. The device for making tofu with lactic acid bacteria according to claim 7, characterized in that: A spiral ring (206) is fixedly mounted on the top of the sealing plate (205), a spiral rod (207) is rotatably mounted on the bottom of the inner wall of the feeding pipe (2), the spiral rod (207) is threadedly mounted on the inner wall of the spiral ring (206), and a stirring blade (208) is fixedly mounted on one end of the spiral rod (207) away from the bottom of the feeding pipe (2).

9. The device for making tofu with lactic acid bacteria according to claim 8, characterized in that: A No. 1 spring is provided between the sliding rod (202) and the feed pipe (2), and the sealing plate (205) is in contact with the surface of the feed port of the feed pipe (2).

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