Anaerobic fermentation tank and fermentation method for yoghourt production

Abstract

The present invention relates to the technical field of fermentation equipment, and discloses an anaerobic fermentation tank and a fermentation method for yogurt production, the anaerobic fermentation tank comprises a tank body, the side wall of the tank body is provided with a sampling pipeline, and the tank body is internally provided with a main stirring assembly, a pumping assembly, a sieve basket, an auxiliary stirring assembly and a transfer assembly. Raw materials can be conveyed into the screening basket through the pumping assembly, so that agglomerates are uniformly collected in the screening basket, then the agglomerates are uniformly crushed through the auxiliary stirring assembly, compared with the prior art, the treatment efficiency is higher, adverse effects on normally fermented and non-agglomerated parts in the raw materials are avoided, the fermentation quality is guaranteed, and the production cost is reduced. The pumping assembly can also pump the raw materials at different height layers, and then the raw materials are further collected and transferred into the sampling pipeline by utilizing the transfer assembly, so that the raw materials at different height layers in the tank body can be conveniently sampled and rapidly sampled, and the sample raw materials can better reflect the fermentation condition in the tank body; analysis and improvement of the fermentation process are facilitated, and the automation degree is high.

Description

Technical Field

[0001] The invention relates to the technical field of fermentation equipment, in particular to an anaerobic fermentation tank and a fermentation method for yogurt production. Background Art

[0002] Anaerobic fermentation tanks are common equipment for industrial microbial cultivation. Their main structures include tanks, stirring systems, temperature control systems, pressure sensors, ventilation systems, pH control systems, and metering control systems. Fermentation tanks are usually made of stainless steel, which has high corrosion resistance and durability. The design focuses on tight structure to avoid contamination and is easy to clean and maintain. The basic principle of yogurt fermentation is to inoculate lactic acid bacteria in milk, so that they can multiply in large quantities under suitable conditions and decompose the lactose in the milk into lactic acid. This process not only changes the shape and taste of milk, but also improves its nutritional value. For example, fermented yogurt contains more lactic acid, which helps the human body absorb minerals such as calcium and iron. At the same time, lactic acid bacteria also produce some nutrients such as vitamins, which are beneficial to human health.

[0003] When anaerobic fermentation tanks are used for yogurt fermentation, there are certain defects: during the fermentation process, objective factors such as improper temperature and improper stirring rate control will cause the yogurt to clump, reducing the fermentation quality of the yogurt. The existing technology handles the caking problem by controlling the stirring rate or stirring time, but the treatment efficiency is low. The change in stirring also changes the fermentation process of the originally normal yogurt raw materials, which in turn leads to problems such as bubbles and protein denaturation; secondly, the fermentation time is as long as several hours. If it is necessary to understand the fermentation status of the yogurt during the fermentation process, the yogurt needs to be sampled and tested. The existing equipment can only discharge the yogurt as a sample through the discharge device at the bottom of the tank body, but the sample only represents the fermentation status at the bottom of the tank body, and cannot fully reflect the overall fermentation quality inside the reaction tank body. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an anaerobic fermentation tank and a fermentation method for yogurt production, which have the advantages of convenient treatment of agglomeration and sampling, and solve the problems of improper treatment of agglomerates in existing anaerobic fermentation tanks and limited sampling of raw materials in the tank during fermentation.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: an anaerobic fermentation tank, comprising a tank body, a sampling pipeline is arranged on the side wall of the tank body, and a main stirring assembly, a pumping assembly, a screen basket, a secondary stirring assembly and a transfer assembly are arranged in the tank body;

[0006] The sampling pipe is set as a horizontal square pipe that passes through the side wall of the tank body. A movable door is installed at one end of the sampling pipe located outside the tank body. The sampling pipe is used to collect samples outside the tank body.

[0007] The pumping assembly includes a collecting pipe vertically arranged in the center of the tank body, a plurality of branch pipe groups evenly arranged are connected to the collecting pipe, the branch pipe group includes a plurality of extension pipes distributed in a circular array, a main valve is installed at the bottom end of the collecting pipe, and auxiliary valves are installed on the extension pipes. The pumping assembly is used to collect the raw materials of each layer inside the tank body and transport them into the screen basket;

[0008] The sieve basket is fixedly connected to the top wall of the tank body, and the sieve basket is used to receive the raw materials and screen the agglomerates;

[0009] The auxiliary stirring assembly comprises an auxiliary stirring rod arranged in the screen basket, and the auxiliary stirring assembly is used to break up lumps in the screen basket;

[0010] The transfer assembly includes a clamp capable of moving back and forth between the screen basket and the extension tube, and the transfer assembly is used to receive the raw materials that fall into the screen basket and transfer them to the sampling pipeline;

[0011] If agglomeration occurs during the fermentation process, the pumping assembly and the auxiliary stirring assembly are operated, the collecting tube collects the raw materials and inputs them into the sieve basket, so that the agglomerates in the raw materials are collected by the sieve basket, and the auxiliary stirring rod breaks up the agglomerates in the sieve basket. If it is necessary to collect the raw materials in the tank as samples, the test tube is pre-assembled on the fixture, and the main valve and the auxiliary valve are controlled while the pumping assembly is started to collect the raw materials at different levels in the tank and transport them to the sieve basket. At this time, the transfer assembly is operated, forcing the fixture carrying the test tube to move to the sieve basket to collect the raw materials first, and then transfer them to the sampling pipeline.

[0012] Preferably, the pumping assembly also includes a delivery pump fixed on the top wall of the tank body, the top of the collecting pipe is fixedly connected to the input end of the delivery pump, an output pipe is fixed to the output end of the delivery pump, one end of the output pipe passes through the top wall of the tank body and extends to above the screen basket, one end of the extension pipe is fixedly connected to the collecting pipe, and the other end of the extension pipe extends to one side of the collecting pipe and tilts downward.

[0013] Preferably, the bottom wall and the side walls of the sieve basket are both provided with sieve holes, the outer wall of the sieve basket is fixed with a support rod, and the top end of the support rod is fixedly connected to the top wall of the tank body.

[0014] Preferably, the auxiliary stirring assembly includes an auxiliary motor fixed to the top wall of the tank body, the auxiliary motor output shaft passes through the top wall of the tank body and is rotatably connected to the top wall of the tank body, the top end of the auxiliary stirring rod is fixedly connected to the auxiliary motor output shaft, and the bottom end of the auxiliary stirring rod extends into the screen basket.

[0015] Preferably, the transfer assembly includes a slide rail fixed on the support rod, one end of the slide rail extends toward the screen basket, the other end of the slide rail extends toward the sampling pipe, a slider is slidably connected in the slide rail, one end of the slide rail is fixedly connected to a drive motor, a drive screw is fixed to the output shaft of the drive motor, the drive screw is in the same direction as the slide rail, both ends of the drive screw are rotatably connected to the two ends of the slide rail respectively, the drive screw passes through the slider and is threadedly connected to the slider, and the clamp is installed on the slider.

[0016] Preferably, the clamp comprises a cylinder with an opening on the top, a fixing pin is movably inserted into the side wall of the cylinder, a spring is fixedly connected between one end of the fixing pin located outside the cylinder and the outer wall of the cylinder, and the spring is sleeved outside the fixing pin.

[0017] Preferably, the outer wall of the cylinder is fixedly connected with a horizontal axis, one end of the horizontal axis is fixedly connected with a connecting block, the top of the connecting block is fixed with a vertical axis, the vertical axis is installed on the sliding block through the main bearing seat, a torsion spring is connected between the connecting block and the main bearing seat, the torsion spring is sleeved on the vertical axis, the top of the vertical axis is fixedly connected with an adjusting gear, and the surface of the slide rail is fixedly connected with an adjusting rack matching the adjusting gear.

[0018] Preferably, the sampling pipe is located at one end of the tank body and is equipped with two symmetrically arranged sealing doors, and the edges of the two sealing doors on opposite sides are provided with notches matching the transverse axis, and the edges of the two sealing doors on opposite sides are fixed with a base shaft, and the base shaft is installed at the end of the sampling pipe through a secondary bearing seat, and a worm gear is fixedly connected to the bottom end of the base shaft, and a double worm is also provided at the lower edge of the end of the sampling pipe, and the double worm is meshed with two worm gears, and the double worm is installed at the end of the sampling pipe through a longitudinal bearing seat, and a secondary synchronous wheel is fixed at one end of the double worm, and a driving shaft is provided at the bottom of the slide rail, and the driving shaft is installed at the bottom of the slide rail through a transverse bearing seat, and a driving gear and a main synchronous wheel are fixed at one end of the driving shaft, a synchronous belt is connected between the main synchronous wheel and the secondary synchronous wheel, and a driving rack matching the driving gear is fixed at the bottom of the slider.

[0019] Preferably, the main stirring assembly is used to stir the raw materials inside the tank body, and the main stirring assembly includes a stirring motor fixed to the top wall of the tank body, a vertical rod is fixed to the output shaft of the stirring motor, the top end of the vertical rod is rotatably connected to the top wall of the tank body, the bottom end of the vertical rod extends into the tank body and is fixed with a driving gear, the main stirring assembly also includes a plurality of vertically stacked and fixed stirring sub-components, the stirring sub-components include a lower sleeve and an upper sleeve, the lower sleeve and the upper sleeve are both rotatably connected to the collecting pipe, upper blades are fixed on both sides of the upper sleeve, lower blades are fixed on both sides of the lower sleeve, a connecting rod is fixed between the end of the upper blade and the end of the lower blade, a side spiral scraper is fixed on the connecting rod, the edge of the side spiral scraper is in contact with the inner wall of the tank body, a driven gear is fixed on the top of the upper sleeve of the uppermost stirring sub-component, the driven gear is meshed with the driving gear, a mounting rod is fixed to the side wall of the lower sleeve of the lowermost stirring sub-component, a lower spiral scraper is fixed on the end of the mounting rod, and the edge of the lower spiral scraper is in contact with the bottom wall of the tank body.

[0020] The invention also discloses a fermentation method for producing yogurt, and the fermentation method for producing yogurt uses the above-mentioned anaerobic fermentation tank.

[0021] Compared with the prior art, the present invention provides an anaerobic fermentation tank and a fermentation method for yogurt production, which have the following beneficial effects:

[0022] 1. The anaerobic fermentation tank and the fermentation method for yogurt production are provided with a sampling pipeline, a pumping component, a screen basket, an auxiliary stirring component and a transfer component. When the pumping component is in operation, the raw materials can be transported to the screen basket, so that the lumps are uniformly collected in the screen basket, and then uniformly crushed by the auxiliary stirring component. Compared with the prior art, the processing efficiency is higher, and the normally fermented and non-lump parts of the raw materials will not be adversely affected, thereby ensuring the fermentation quality. In addition, the pumping component can also pump raw materials at different height layers, and then the transfer component is used to further collect and transfer the raw materials to the sampling pipeline, which is convenient for sampling and rapid sampling of raw materials at different height layers inside the tank body. The sample raw materials can better reflect the fermentation status inside the tank body, which is convenient for the analysis and improvement of the fermentation process, and has a high degree of automation.

[0023] 2. This anaerobic fermentation tank and fermentation method for yogurt production can improve the sealing performance of the sampling pipeline close to the inside of the tank by setting two sealing doors, avoid gas exchange inside and outside the tank, ensure the stability of the fermentation environment inside the tank, and the sealing door can be opened and closed during the movement of the clamp, avoiding interference with the cylinder entering and exiting the sampling pipeline.

[0024] 3. This anaerobic fermentation tank and fermentation method for yogurt production, by setting a main stirring component, uses the stirring component to drive the upper blade, lower blade, side spiral scraper and lower spiral scraper to rotate, wherein the upper blade and the lower blade are used to stir the yogurt raw materials to improve the fermentation effect, and the side spiral scraper and the lower spiral scraper clean the inner side wall and the inner bottom wall of the tank body respectively to avoid the formation of thick lumps on the inner wall of the tank body, which can not only improve the yogurt output rate, but also relieve the subsequent cleaning pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A cross-sectional view of an anaerobic fermentation tank of the present invention Figure 1 ;

[0026] Figure 2 A cross-sectional view of an anaerobic fermentation tank of the present invention Figure 2 ;

[0027] Figure 3 It is a structural schematic diagram of the tank body of the present invention;

[0028] Figure 4 It is an exploded view of the installation structure of the pumping assembly of the present invention;

[0029] Figure 5 For the present invention Figure 4 A magnified view of part A;

[0030] Figure 6 It is a schematic structural diagram of the transport component of the present invention;

[0031] Figure 7 For the present invention Figure 6 A magnified view of part B;

[0032] Figure 8 It is a schematic diagram of the installation structure of the slide rail of the present invention;

[0033] Fig. 9 For the present invention Figure 8 Enlarged view of part C;

[0034] Fig.10 It is a working schematic diagram of the transport component of the present invention;

[0035] Fig.11 For the present invention Fig.10 A magnified view of the D portion;

[0036] Fig.12 It is a schematic diagram of the three-dimensional structure of the main stirring assembly of the present invention.

[0037] In the figure: 1, tank body; 2, sampling pipeline; 21, movable door; 22, sealing door; 23, base shaft; 24, auxiliary bearing seat; 25, worm gear; 26, double worm; 27, longitudinal bearing seat; 28, auxiliary synchronous wheel; 29, driving shaft; 210, driving gear; 211, main synchronous wheel; 212, synchronous belt; 213, driving rack; 3, main stirring assembly; 31, stirring motor; 32, vertical rod; 33, driving gear; 34, stirring sub-component; 341, lower casing; 342, upper casing; 343, upper blade; 344, lower blade; 345, connecting rod; 346, side spiral scraper; 347, driven gear; 348, Mounting rod; 349, lower spiral scraper; 4, pumping assembly; 41, collecting pipe; 42, extension pipe; 43, main valve; 44, auxiliary valve; 45, delivery pump; 46, output pipe; 5, screen basket; 51, support rod; 6, auxiliary stirring assembly; 61, auxiliary stirring rod; 62, auxiliary motor; 7, transfer assembly; 71, clamp; 711, cylinder; 712, fixing pin; 713, spring; 714, horizontal axis; 715, connecting block; 716, vertical axis; 717, main bearing seat; 718, torsion spring; 719, adjusting gear; 710, adjusting rack; 72, slide rail; 73, slider; 74, drive motor; 75, drive screw. DETAILED DESCRIPTION

[0038] 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.

[0039] As introduced in the background technology, there are deficiencies in the prior art. In order to solve the above technical problems, the present application proposes an anaerobic fermentation tank and a fermentation method for yogurt production.

[0040] Example 1: Please refer to Figure 1-Figure 5 An anaerobic fermentation tank comprises a tank body 1, a sampling pipe 2 is arranged on the side wall of the tank body 1, and a main stirring component 3, a pumping component 4, a screen basket 5, a secondary stirring component 6 and a transport component 7 are arranged in the tank body 1;

[0041] The sampling pipe 2 is configured as a horizontal square pipe that penetrates the side wall of the tank body 1. A movable door 21 is installed at one end of the sampling pipe 2 located outside the tank body 1. The sampling pipe 2 is used to collect samples outside the tank body 1.

[0042] The pumping assembly 4 includes a collecting pipe 41 vertically arranged at the center of the tank body 1, and a plurality of branch pipe groups evenly arranged are connected to the collecting pipe 41, and the branch pipe group includes a plurality of extension pipes 42 distributed in a circular array. A main valve 43 is installed at the bottom of the collecting pipe 41, and auxiliary valves 44 are installed on the extension pipes 42. The pumping assembly 4 is used to collect the raw materials of each layer inside the tank body 1 and transport them to the screen basket 5;

[0043] The sieve basket 5 is fixedly connected to the top wall of the tank body 1, and the sieve basket 5 is used to receive the raw materials and screen the agglomerates;

[0044] The auxiliary stirring assembly 6 includes an auxiliary stirring rod 61 disposed in the screen basket 5, and the auxiliary stirring assembly 6 is used to break up lumps in the screen basket 5;

[0045] The transfer assembly 7 includes a clamp 71 that can move back and forth between the screen basket 5 and the extension tube 42. The transfer assembly 7 is used to receive the raw materials that fall in front of the screen basket 5 and transfer them to the sampling pipeline 2.

[0046] If agglomeration occurs during the fermentation process, the pumping assembly 4 and the auxiliary stirring assembly 6 are operated, the collecting tube 41 collects the raw materials and inputs them into the sieve basket 5, so that the agglomerates in the raw materials are collected by the sieve basket 5, and the auxiliary stirring rod 61 breaks the agglomerates in the sieve basket 5. If it is necessary to collect the raw materials in the tank body 1 as a sample, a test tube is pre-assembled on the clamp 71, and the main valve 43 and the auxiliary valve 44 are controlled while the pumping assembly 4 is started, so as to collect the raw materials at different levels in the tank body 1 and transport them to the sieve basket 5. At this time, the transport assembly 7 is operated, forcing the clamp 71 carrying the test tube to move to the sieve basket 5 to collect the raw materials first, and then transfer them to the sampling pipeline 2;

[0047] The collecting tube 41 is set as a round tube, and each branch tube group is preferably provided with three extension tubes 42. The sieve basket 5 is arranged above the raw material inside the tank body 1. The clamp 71 is used to clamp the test tube for sampling. The movable door 21 is sealed at the connection with the sampling pipe 2, and is opened and closed by manual operation.

[0048] When in use, during the yogurt fermentation process, the main stirring component 3 operates and stirs the yogurt raw materials, the pumping component 4 and the auxiliary stirring component 6 are started, the pumping component 4 collects the raw materials through the collecting pipe 41, and then transports the raw materials to the screen basket 5, wherein the lumps in the raw materials are trapped in the screen basket 5, and the unlumped raw materials pass through the screen basket 5. When the auxiliary stirring component 6 is in operation, the auxiliary stirring rod 61 rotates to break the lumps in the screen basket 5, and the broken lumps pass through the screen basket 5 and flow back into the raw materials, thereby realizing the treatment of the lumps. If it is necessary to sample and test the raw materials during the fermentation process, the movable door 21 is opened in advance, and the test tube is installed in the screen basket 5. In the fixture 71, the pumping assembly 4 is then started to control the opening and closing of the main valve 43 and the auxiliary valve 44, so that the collecting tube 41 can not only suck the raw material from the bottom of the collecting tube 41 when collecting the raw material, but also suck the raw material from the extension tube 42 on any branch tube group, so that the raw materials at different height layers can be collected and then output to the sieve basket 5. At the same time, the transport assembly 7 is started, and the transport assembly 7 first drives the fixture 71 to move to the sieve basket 5, so that the test tube on the fixture 71 collects the sample raw material, and then drives the fixture 71 to move to the sampling pipeline 2, and finally opens the movable door 21 to take out the test tube on the fixture 71;

[0049] The tank body 1 is provided with a sampling pipe 2, a pumping component 4, a screen basket 5, an auxiliary stirring component 6 and a transfer component 7. When the pumping component 4 is in operation, the raw material can be transported to the screen basket 5, so that the lumps are uniformly collected in the screen basket 5, and then uniformly crushed and processed by the auxiliary stirring component 6. Compared with the prior art, the processing efficiency is higher, and no adverse effects are caused on the normally fermented and non-lump parts of the raw materials, thereby ensuring the fermentation quality. In addition, the pumping component 4 can also pump raw materials at different height layers, and then use the transfer component 7 to further collect and transfer the raw materials to the sampling pipe 2, which is convenient for sampling and rapid sampling of raw materials at different height layers inside the tank body 1. The sample raw materials can better reflect the fermentation status inside the tank body 1, which is convenient for the analysis and improvement of the fermentation process, and has a high degree of automation.

[0050] Example 2: See Figure 4, different from the above embodiment, the pumping assembly 4 also includes a delivery pump 45 fixed on the top wall of the tank body 1, the top of the collecting pipe 41 is fixedly connected to the input end of the delivery pump 45, and the output end of the delivery pump 45 is fixed with an output pipe 46, one end of the output pipe 46 passes through the top wall of the tank body 1 and extends to the top of the sieve basket 5, one end of the extension pipe 42 is fixedly connected to the collecting pipe 41, and the other end of the extension pipe 42 extends to one side of the collecting pipe 41 and tilts downward, the bottom wall and side wall of the sieve basket 5 are both provided with sieve holes, and the outer wall of the sieve basket 5 is fixed with a support rod 51, the top of the support rod 51 is fixedly connected to the inner top wall of the tank body 1, and the auxiliary stirring assembly 6 includes an auxiliary motor 62 fixed on the top wall of the tank body 1, the output shaft of the auxiliary motor 62 passes through the top wall of the tank body 1 and is rotatably connected to the top wall of the tank body 1, the top of the auxiliary stirring rod 61 is fixedly connected to the output shaft of the auxiliary motor 62, and the bottom end of the auxiliary stirring rod 61 extends into the sieve basket 5.

[0051] The height of the bottom end of the output pipe 46 is greater than the height of the top surface of the screen basket 5, and the bottom end of the output pipe 46 vertically points to the screen basket 5 below. When in use, the delivery pump 45 is started, and the delivery pump 45 generates suction at the bottom end of the collecting pipe 41 and the end of the extension pipe 42. After the raw materials are sucked in, they pass through the collecting pipe 41, the delivery pump 45 and the output pipe 46 in sequence, and are finally discharged into the screen basket 5, wherein the unagglomerated raw materials are discharged through the sieve holes on the screen basket 5, and the agglomerated raw materials are retained in the screen basket 5. Subsequently, the auxiliary motor 62 is started, and the auxiliary motor 62 drives the auxiliary stirring rod 61 to rotate when it is running. When the auxiliary stirring rod 61 rotates, the agglomerated raw materials in the screen basket 5 are crushed, and the crushed raw materials are discharged from the sieve holes and fall back into the raw materials;

[0052] The suction force generated by the delivery pump 45 is used to collect the lumps inside the tank body 1, and then the sieve basket 5 is used to collect the lumps, and the rotating auxiliary stirring rod 61 is used to crush the lumps, which facilitates the efficient treatment of the lumps separately and avoids affecting the normal raw materials. By setting up multiple branch pipe groups, the raw materials can be evenly sucked into various parts of the tank body 1, and the collection efficiency is higher.

[0053] Example 3, see Figure 6-Figure 11, which is different from the above embodiment, the transport assembly 7 includes a slide rail 72 fixed on the support rod 51, one end of the slide rail 72 extends toward the screen basket 5, and the other end of the slide rail 72 extends toward the sampling pipe 2, a slider 73 is slidably connected in the slide rail 72, one end of the slide rail 72 is fixedly connected to a drive motor 74, and a drive screw 75 is fixed to the output shaft of the drive motor 74, the drive screw 75 is in the same direction as the slide rail 72, and the two ends of the drive screw 75 are respectively rotatably connected to the two ends of the slide rail 72, the drive screw 75 penetrates the slider 73 and is threadedly connected to the slider 73, the clamp 71 is installed on the slider 73, and the clamp 71 includes a cylinder 711 with an opening on the top, and the side wall of the cylinder 711 is movably connected with a fixed Pin 712, the fixing pin 712 is located at one end outside the cylinder 711 and is fixedly connected with a spring 713 between the outer wall of the cylinder 711, the spring 713 is sleeved on the outside of the fixing pin 712, the outer wall of the cylinder 711 is fixedly connected with a horizontal axis 714, one end of the horizontal axis 714 is fixedly connected with a connecting block 715, a vertical axis 716 is fixed on the top of the connecting block 715, the vertical axis 716 is installed on the slider 73 through a main bearing seat 717, a torsion spring 718 is connected between the connecting block 715 and the main bearing seat 717, the torsion spring 718 is sleeved on the vertical axis 716, the top of the vertical axis 716 is fixedly connected with an adjusting gear 719, and the surface of the slide rail 72 is fixedly connected with an adjusting rack 710 matching the adjusting gear 719.

[0054] Among them, the slide rail 72 is arranged horizontally, and in the initial state, the cylinder 711 is located in the sampling pipe 2, and the fixing pin 712 is arranged on the outer wall of the cylinder 711 on the side close to the movable door 21. At this time, the adjusting rack 710 is separated from the adjusting gear 719. When in use, the movable door 21 is opened and the fixing pin 712 is pulled, and then the test tube is inserted into the cylinder 711, and then the fixing pin 712 is loosened. The fixing pin 712 is inserted into the inside of the cylinder 711 under the action of the spring 713 and pressed against the test tube to fix the test tube, and then the driving motor 74 is started. After the driving motor 74 is running, it drives the driving screw 75 to rotate. When the driving screw 75 rotates, the sliding block 73 is driven to slide along the slide rail 72. At this time, the sliding block 73 moves toward the screen basket 5, and the sliding block 73 When moving, the entire clamp 71 is driven to move toward the sieve basket 5. When the cylinder 711 on the clamp 71 is moved out of the sampling pipe 2, the adjusting gear 719 on the clamp 71 contacts the adjusting rack 710. At this time, the adjusting gear 719 rolls along the adjusting rack 710, thereby driving the vertical shaft 716 and the connecting block 715 to rotate. When the connecting block 715 rotates, it drives the horizontal shaft 714 to swing. When the horizontal shaft 714 swings, it drives the cylinder 711 and the test tube to move, and finally the test tube is just above the sieve basket 5 when rotating, and is located below the output pipe 46, thereby collecting the raw material sample discharged from the output pipe 46. Similarly, when the driving motor 74 drives the driving screw 75 to rotate in the opposite direction, the cylinder 711 and the test tube will be reset and reinserted into the sampling pipe 2;

[0055] By setting up the transfer component 7, when the driving motor 74 is started, the clamp 71 can be driven to move back and forth between the sampling pipe 2 and the sieve basket 5, and the sample is collected through the test tube fixed in the cylinder 711, and finally the sample is transferred back to the sampling pipe 2, which facilitates the automated sampling of the yogurt raw material samples.

[0056] Example 4, see Figure 6-Figure 9 , which is different from the above-mentioned embodiment, the sampling pipe 2 is located at one end of the tank body 1 and is equipped with two symmetrically arranged sealing doors 22, and the edges of the two sealing doors 22 on opposite sides are provided with notches matching the transverse axis 714, and the edges of the two sealing doors 22 on opposite sides are fixed with a base shaft 23, and the base shaft 23 is installed at the end of the sampling pipe 2 through a secondary bearing seat 24, and the bottom end of the base shaft 23 is fixedly connected with a worm gear 25, and the lower edge of the end of the sampling pipe 2 is also provided with a double worm 26, and the double worm 26 and the two worm gears 25 are connected to each other. The double worm 26 is installed at the end of the sampling pipe 2 through the longitudinal bearing seat 27. A secondary synchronous wheel 28 is fixed at one end of the double worm 26. A driving shaft 29 is provided at the bottom of the slide rail 72. The driving shaft 29 is installed at the bottom of the slide rail 72 through a transverse shaft 714 seat. A driving gear 210 and a main synchronous wheel 211 are fixed at one end of the driving shaft 29. A synchronous belt 212 is connected between the main synchronous wheel 211 and the secondary synchronous wheel 28. A driving rack 213 matching the driving gear 210 is fixed at the bottom of the slider 73.

[0057] In the initial state, the two sealing doors 22 fit the ends of the sampling pipe 2 and seal the ends of the sampling pipe 2. The notches on the sealing doors 22 just clamp the horizontal axis 714 on the clamp 71. The sealing doors 22 can improve the sealing performance, avoid the exchange of gas inside and outside the tank body 1 during sampling, and ensure the stability of the fermentation environment. The surface of the double worm 26 is provided with two sets of threads with opposite rotation directions, and the two sets of threads are matched with the two worm wheels 25 respectively.

[0058] When in use, the transport assembly 7 operates and drives the slider 73 and the clamp 71 to move toward the outside of the sampling pipe 2. When the cylinder 711 on the clamp 71 is about to approach the sealing door 22, the driving rack 213 at the bottom of the slider 73 contacts the driving gear 210, thereby driving the driving gear 210 to rotate. When the driving gear 210 rotates, it drives the driving shaft 29 and the main synchronous wheel 211 to rotate. When the main synchronous wheel 211 rotates, it drives the auxiliary synchronous wheel 28 to rotate using the synchronous belt 212. When the auxiliary synchronous wheel 28 rotates, it drives the double worm 26 to rotate. When the double worm 26 rotates, it drives the two worm wheels 25 to rotate at the same time. The worm wheels 25 rotate at the same time. When rotating, the base shaft 23 is driven to rotate, and when the base shaft 23 rotates, the sealing door 22 swings and then opens, so that the cylinder 711 can be smoothly moved out. When the transfer assembly 7 drives the slider 73 and the clamp 71 to move into the sampling pipe 2, the cylinder 711 first enters the sampling pipe 2, and then the driving rack 213 on the slider 73 contacts the driving gear 210. At this time, the driving gear 210 rotates in the opposite direction, and the two sealing doors 22 are forced to close again and clamp the horizontal shaft 714 through the transmission of the main synchronous wheel 211, the synchronous belt 212, the secondary synchronous wheel 28, the double worm 26, the worm wheel 25 and the base shaft 23;

[0059] By providing two sealing doors 22, the sealing performance of the sampling pipe 2 close to the inner end of the tank body 1 can be improved, gas exchange inside and outside the tank body 1 can be avoided, and the stability of the fermentation environment inside the tank body 1 is ensured. In addition, the sealing door 22 can be opened and closed during the movement of the clamp 71, avoiding interference with the cylinder 711 entering and exiting the sampling pipe 2.

[0060] Example 5, see Fig.12, which is different from the above embodiment, the main stirring assembly 3 is used to stir the raw materials inside the tank body 1, and the main stirring assembly 3 includes a stirring motor 31 fixed to the top wall of the tank body 1, and the output shaft of the stirring motor 31 is fixed with a vertical rod 32, the top of the vertical rod 32 is rotatably connected to the top wall of the tank body 1, and the bottom of the vertical rod 32 extends into the tank body 1 and is fixed with a driving gear 33, and the main stirring assembly 3 also includes a plurality of vertically stacked and fixed stirring sub-components 34, and the stirring sub-components 34 include a lower sleeve 341 and an upper sleeve 342, and the lower sleeve 341 and the upper sleeve 342 are both rotatably connected to the collecting pipe 41, and the upper sleeve 342 is fixed with upper blades 3 on both sides. 43, lower blades 344 are fixed on both sides of the lower sleeve 341, a connecting rod 345 is fixed between the end of the upper blade 343 and the end of the lower blade 344, a side spiral scraper 346 is fixed on the connecting rod 345, the edge of the side spiral scraper 346 is in contact with the inner wall of the tank body 1, a driven gear 347 is fixed on the top of the upper sleeve 342 of the uppermost stirring element 34, the driven gear 347 is meshed with the driving gear 33, a mounting rod 348 is fixed to the side wall of the lower sleeve 341 of the lowermost stirring element 34, a lower spiral scraper 349 is fixed at the end of the mounting rod 348, and the edge of the lower spiral scraper 349 is in contact with the inner bottom wall of the tank body 1.

[0061] Among them, the centers of adjacent stacked stirring sub-components 34 coincide, but the angles are vertical, and the lower sleeve 341 on the top stirring sub-component 34 is fixedly connected with the upper sleeve 342 on the bottom stirring sub-component 34. In actual application, in areas close to the fermentation tank wall, the bottom of the tank and other areas far away from the blade range, unstirred yogurt will adhere to the tank wall structure in the form of clots in large quantities. When in use, the stirring motor 31 is started, and the stirring motor 31 drives the vertical rod 32 and the driving gear 33 to rotate. When the driving gear 33 rotates, it drives the stirring sub-component 34 to rotate. After the upper blade 343 and the lower blade 344 on the stirring sub-component 34 rotate, the raw materials can be stirred, and the side spiral scraper 346 and the lower spiral scraper 349 are respectively used to scrape off the yogurt attached to the inner wall of the tank body 1;

[0062] By setting up a main stirring component 3, the stirring component is used to drive the upper blade 343, the lower blade 344, the side spiral scraper 346 and the lower spiral scraper 349 to rotate, wherein the upper blade 343 and the lower blade 344 are used to stir the yogurt raw materials to improve the fermentation effect, and the side spiral scraper 346 and the lower spiral scraper 349 clean the inner side wall and the inner bottom wall of the tank body 1 respectively to avoid the formation of thick lumps on the inner wall of the tank body 1, which can not only improve the yogurt output rate, but also relieve the subsequent cleaning pressure.

[0063] 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. An anaerobic fermentation tank, comprising a tank body, characterized in that: The side wall of the tank body is provided with a sampling pipeline, and the tank body is provided with a main stirring component, a pumping component, a screen basket, a secondary stirring component and a transfer component; The sampling pipe is set as a horizontal square pipe that passes through the side wall of the tank body. A movable door is installed at one end of the sampling pipe located outside the tank body. The sampling pipe is used to collect samples outside the tank body. The pumping assembly includes a collecting pipe vertically arranged in the center of the tank body, a plurality of branch pipe groups evenly arranged are connected to the collecting pipe, the branch pipe group includes a plurality of extension pipes distributed in a circular array, a main valve is installed at the bottom end of the collecting pipe, and auxiliary valves are installed on the extension pipes. The pumping assembly is used to collect the raw materials of each layer inside the tank body and transport them into the screen basket; The sieve basket is fixedly connected to the top wall of the tank body, and the sieve basket is used to receive the raw materials and screen the agglomerates; The auxiliary stirring assembly comprises an auxiliary stirring rod arranged in the screen basket, and the auxiliary stirring assembly is used to break up lumps in the screen basket; The transfer assembly includes a clamp capable of moving back and forth between the screen basket and the extension tube, and the transfer assembly is used to receive the raw materials that fall into the screen basket and transfer them to the sampling pipeline; If agglomeration occurs during the fermentation process, the pumping assembly and the auxiliary stirring assembly are operated, the collecting tube collects the raw materials and inputs them into the sieve basket, so that the agglomerates in the raw materials are collected by the sieve basket, and the auxiliary stirring rod breaks up the agglomerates in the sieve basket. If it is necessary to collect the raw materials in the tank as samples, the test tube is pre-assembled on the fixture, and the main valve and the auxiliary valve are controlled while the pumping assembly is started to collect the raw materials at different levels in the tank and transport them to the sieve basket. At this time, the transfer assembly is operated, forcing the fixture carrying the test tube to move to the sieve basket to collect the raw materials first, and then transfer them to the sampling pipeline.

2. The anaerobic fermentation tank according to claim 1, characterized in that: The pumping assembly also includes a delivery pump fixed on the top wall of the tank body, the top of the collecting pipe is fixedly connected to the input end of the delivery pump, an output pipe is fixed to the output end of the delivery pump, one end of the output pipe passes through the top wall of the tank body and extends above the screen basket, one end of the extension pipe is fixedly connected to the collecting pipe, and the other end of the extension pipe extends to one side of the collecting pipe and tilts downward.

3. The anaerobic fermentation tank according to claim 1, characterized in that: The bottom wall and the side wall of the sieve basket are both provided with sieve holes, the outer wall of the sieve basket is fixed with a support rod, and the top end of the support rod is fixedly connected to the top wall of the tank body.

4. The anaerobic fermentation tank according to claim 1, characterized in that: The auxiliary stirring assembly includes an auxiliary motor fixed to the top wall of the tank body, the auxiliary motor output shaft penetrates the top wall of the tank body and is rotatably connected to the top wall of the tank body, the top end of the auxiliary stirring rod is fixedly connected to the auxiliary motor output shaft, and the bottom end of the auxiliary stirring rod extends into the screen basket.

5. The anaerobic fermentation tank according to claim 3, characterized in that: The transfer assembly includes a slide rail fixed on a support rod, one end of the slide rail extends toward the screen basket, the other end of the slide rail extends toward the sampling pipe, a slider is slidably connected in the slide rail, a drive motor is fixedly connected to one end of the slide rail, a drive screw is fixed to the output shaft of the drive motor, the drive screw is in the same direction as the slide rail, both ends of the drive screw are rotatably connected to both ends of the slide rail respectively, the drive screw passes through the slider and is threadedly connected to the slider, and the clamp is installed on the slider.

6. The anaerobic fermentation tank according to claim 5, characterized in that: The clamp comprises a cylinder with an opening at the top, a fixing pin is movably inserted into the side wall of the cylinder, a spring is fixedly connected between one end of the fixing pin located outside the cylinder and the outer wall of the cylinder, and the spring is sleeved outside the fixing pin.

7. An anaerobic fermentation tank according to claim 6, characterized in that: The outer wall of the cylinder is fixedly connected with a horizontal axis, one end of the horizontal axis is fixedly connected with a connecting block, the top of the connecting block is fixed with a vertical axis, the vertical axis is installed on the sliding block through the main bearing seat, a torsion spring is connected between the connecting block and the main bearing seat, the torsion spring is sleeved on the vertical axis, the top of the vertical axis is fixedly connected with an adjusting gear, and the surface of the slide rail is fixedly connected with an adjusting rack matching the adjusting gear.

8. The anaerobic fermentation tank according to claim 7, characterized in that: The sampling pipeline is located at one end of the tank body and is equipped with two symmetrically arranged sealing doors. The edges of the two sealing doors on opposite sides are provided with notches matching the transverse axis. The edges of the two sealing doors on opposite sides are fixed with a base shaft. The base shaft is installed at the end of the sampling pipeline through a secondary bearing seat. A worm gear is fixedly connected to the bottom end of the base shaft. A double worm is also provided at the lower edge of the end of the sampling pipeline. The double worm is meshed with two worm gears. The double worm is installed at the end of the sampling pipeline through a longitudinal bearing seat. A secondary synchronous wheel is fixed at one end of the double worm. A driving shaft is provided at the bottom of the slide rail. The driving shaft is installed at the bottom of the slide rail through a transverse bearing seat. A driving gear and a main synchronous wheel are fixed at one end of the driving shaft. A synchronous belt is connected between the main synchronous wheel and the secondary synchronous wheel. A driving rack matching the driving gear is fixed at the bottom of the slider.

9. The anaerobic fermentation tank according to claim 2, characterized in that: The main stirring assembly is used to stir the raw materials inside the tank body. The main stirring assembly includes a stirring motor fixed to the top wall of the tank body, a vertical rod is fixed to the output shaft of the stirring motor, the top of the vertical rod is rotatably connected to the top wall of the tank body, the bottom of the vertical rod extends into the tank body and is fixed with a driving gear, the main stirring assembly also includes a plurality of vertically stacked and fixed stirring sub-components, the stirring sub-components include a lower sleeve and an upper sleeve, both of which are rotatably connected to the collecting pipe, upper blades are fixed on both sides of the upper sleeve, lower blades are fixed on both sides of the lower sleeve, a connecting rod is fixed between the end of the upper blade and the end of the lower blade, a side spiral scraper is fixed on the connecting rod, and the edge of the side spiral scraper is in contact with the inner wall of the tank body, a driven gear is fixed to the top of the upper sleeve of the uppermost stirring sub-component, and the driven gear is meshed with the driving gear, a mounting rod is fixed to the side wall of the lower sleeve of the lowermost stirring sub-component, a lower spiral scraper is fixed on the end of the mounting rod, and the edge of the lower spiral scraper is in contact with the bottom wall of the tank body.

10. A fermentation method for yogurt production, characterized in that: The fermentation method for producing yogurt uses an anaerobic fermentation tank as described in any one of claims 1-9.

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