A continuous pre-cooling frozen dough processing device and method

Abstract

The present invention belongs to the field of frozen dough, and particularly relates to a continuous pre-cooling frozen dough processing device and method. The device includes a premixing device, a stirring and kneading device, a rolling and conveying device, and a dough wrapping and freezing device. The premixing device is used to continuously premix water and auxiliary materials and then convey them together with main materials such as flour to the stirring and kneading device. The stirring and kneading device is used to mix, stir, and knead various auxiliary and main materials and then convey them to the rolling and conveying device. The rolling and conveying device rolls the dough into a dough sheet, and further sprays auxiliary materials according to the process and then conveys it to the dough wrapping and freezing device. The dough wrapping and freezing device rolls the dough sheet into a dough roll while spraying liquid nitrogen to complete the production of frozen dough. The premixing device includes a solid auxiliary material mixing device, a liquid auxiliary material mixing device, a secondary premixing device, and a main material feeding pipe. The main body of the stirring and kneading device is a set of screw conveying devices, which consists of a reverse conveying section, a first forward conveying section, a whipping section, a second forward conveying section, and a dough discharging port. The rolling and conveying device consists of a rolling device, a conveyor belt, a spiked roller, and an auxiliary material spreading device. The dough wrapping and freezing device consists of a rolling cutter, a limiting passive roller, a liquid nitrogen nozzle, a set of active rollers, and a finished product box. The present invention can complete the rapid freezing of frozen dough, realize the continuous production of frozen dough, and has high market practical application value.

Description

Technical Field

[0001] The present invention belongs to the field of frozen dough processing in food processing, and particularly relates to a continuous pre-cooling frozen dough processing device and method. Background Art

[0002] At present, frozen bakery products including frozen dough and frozen semi-finished products are widely used. After being frozen in a central factory, frozen bakery products are transported through a cold chain, which can not only save labor, time, equipment and site costs for enterprises, but also maintain a stable taste. Therefore, such products are very popular among baking and catering enterprises. The main core technical problems faced by current pre-cooling frozen dough production enterprises focus on the quick-freezing link, and it is necessary to minimize the impact of ice crystal growth on the dough and better maintain good characteristics. The common quick-freezing methods result in slow cooling of the central area of the dough, and the freezing and storage methods may also have an adverse effect on the activity of yeast that may be added. In addition, each link in the production of frozen dough has strict time requirements, but currently each link is carried out independently and non-continuously. If the coordination is improper, such as the pre-mixed slurry being placed for too long, it may affect the quality stability of the product. Pre-cooling frozen dough production enterprises need to develop a suitable continuous pre-cooling frozen dough processing technology. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects described in the prior art, and thus provide a continuous pre-cooling frozen dough processing device and method. The present invention can complete the rapid freezing of frozen dough, realize the continuous production of frozen dough, and has high practical application value in the market. To achieve the above purpose, the present invention provides the following technical solutions:

[0004] A continuous pre-cooling frozen dough processing device includes a premixing device, a stirring and kneading device, a rolling and conveying device, and a dough-rolling and freezing device. The premixing device is used to continuously premix water and auxiliary materials and then transport them together with main materials such as flour to the stirring and kneading device; the stirring and kneading device is used to mix, stir and knead various auxiliary and main materials and then transport them to the rolling and conveying device; the rolling and conveying device rolls the dough into a dough sheet, further sprays auxiliary materials according to the process and then transports it to the dough-rolling and freezing device; the dough-rolling and freezing device rolls the dough sheet into a dough roll while spraying liquid nitrogen to complete the production of frozen dough.

[0005] The premixing device includes a solid auxiliary material mixing device, a liquid auxiliary material mixing device, a secondary premixing device, and a main material feeding pipe, and the main material feeding pipe is used for feeding main materials such as flour.

[0006] The solid auxiliary material mixing device is in the shape of a circular cylinder, sealed at the bottom and open at the top. It is divided into three chambers, namely the inner, middle, and outer chambers, with three layers inside and outside; the solid device water inlet pipe enters the middle chamber from the bottom, and the direction is tangent to the circle to make the water flow rotate in the middle chamber. The solid auxiliary material pipe extends into the middle chamber from the top, and different numbers of solid auxiliary material pipes are set according to process requirements. The solid auxiliary materials fall into the water flow in the middle chamber for mixing. In the upper middle part of the outer wall of the middle chamber, there is a middle outlet, and the mixed auxiliary materials enter the outer chamber from the middle outlet, and the direction is tangent to the circle to make the auxiliary materials rotate in the outer chamber; in the upper middle part of the outer wall of the outer chamber, there is a solid uniformly mixed auxiliary material outlet pipe, and the auxiliary materials further uniformly mixed in the outer chamber enter the secondary premixing device through the solid uniformly mixed auxiliary material outlet pipe. Different numbers of solid auxiliary material mixing devices 5 can be arranged and combined according to the process.

[0007] The liquid auxiliary material mixing device is in the shape of a circular cylinder, sealed at the bottom and top. It is divided into two chambers, namely the inner and outer chambers, with two layers inside and outside. The liquid device water inlet pipe enters the outer chamber from the bottom, and the direction is tangent to the circle to make the water flow rotate in the outer chamber; different numbers of liquid auxiliary material pipes are set according to process requirements. The liquid auxiliary material pipe 14 is located at the other end of the circle of the liquid device water inlet pipe, and the direction is tangent to the circle and consistent with the liquid device water inlet pipe, so that the liquid auxiliary materials are mixed with water and then rotate in the outer chamber. The auxiliary materials uniformly mixed in the outer chamber enter the secondary premixing device through the liquid uniformly mixed auxiliary material outlet pipe located at the upper part. Different numbers of liquid auxiliary material mixing devices can be arranged and combined according to the process.

[0008] The secondary premixing device is sleeved outside the main material feeding pipe 8 and consists of a mixing cylinder and a discharging cylinder. The mixing cylinder is wider at the top and narrower at the bottom and is located in the outermost layer. The discharging cylinder is in the shape of a cylinder, with a diameter larger than that of the main material feeding pipe, and is sleeved on the main material feeding pipe to form a certain gap. The highest point of the discharging cylinder is lower than the highest point of the mixing cylinder; various auxiliary materials enter the bottom of the mixing cylinder through their respective inlet pipes for re-mixing. After the water level of the premixed slurry rises above the highest point of the discharging cylinder, it enters the gap and flows downward, and in the outlet, the premixed slurry wraps the main material and enters the stirring and kneading device.

[0009] The main body of the stirring and kneading device is a set of screw conveying device, which consists of a reverse conveying section, a first forward conveying section, a whipping section, a second forward conveying section, and a dough discharging port; the reverse conveying section is vertically arranged and connected to the bottom of the secondary premixing device, reversely conveys the premixed slurry and the main material, and after preliminary mixing, enters the first forward conveying section horizontally arranged below, and is further uniformly mixed and then conveyed to the whipping section; the whipping section is to install a certain number of whipping rods on the rotating shaft, and the whipping rods rotate with the rotating shaft to mechanically whip the dough, tear it, and then enter the second forward conveying section, and after final uniform mixing, enter the rolling and conveying device through the dough discharging port.

[0010] The roller conveyor device consists of a rolling device, a conveyor belt, a spiked roller, and an auxiliary material spreading device. The rolling device is located below the dough discharge port, rolls the dough into a dough sheet, and then conveys it forward by the conveyor belt. The spiked roller covered with spikes rolls and presses the dough sheet on the conveyor belt. The auxiliary material spreading device is located behind the spiked roller and spreads auxiliary materials above the dough sheet according to process requirements.

[0011] The dough sheet freezing device consists of a rolling cutter, a limit passive roller, a liquid nitrogen nozzle, a set of active rollers, and a finished product box. The rolling cutter consists of a roller and a cutter installed on the roller, and is located above the conveyor belt at a position where the dough sheet can be cut. After the cutter rotates to the lowest position with the roller to cut the dough sheet, it continues to rotate and rolls up a small section of the starting end of the subsequent dough sheet. The set of active rollers consists of several active rollers, a power device, and a control device. The active rollers rotate driven by the power device. According to process requirements, several active rollers form an arc-shaped roller set. The lowest active roller is located above the end of the conveyor belt and contacts the dough sheet being conveyed. The limit passive roller consists of a limit frame and a passive roller. There are hollow long rectangular frames on both side brackets of the limit frame, and the passive roller slides up and down in the long rectangular frames. According to process needs, several limit passive rollers are set. A downward spraying liquid nitrogen nozzle is arranged above the passive roller closest to the set of active rollers, and the liquid nitrogen nozzle slides together with the passive roller. The control device is used to control the actions of the conveyor belt, the rolling cutter, the liquid nitrogen nozzle, and the set of active rollers.

[0012] A continuous pre-cooling and freezing dough processing method includes the following steps:

[0013] (1) Select appropriate auxiliary materials and main materials according to process requirements. Divide the auxiliary materials into solid auxiliary materials and liquid auxiliary materials, and pre-mix them with water respectively using a solid auxiliary material mixing device and a liquid auxiliary material mixing device and then enter a secondary pre-mixing device. According to different process requirements such as the water solubility and emulsification of the auxiliary materials, different arrangements and combinations of the mixing devices are made:

[0014] ① Parallel mode, each mixing device is directly connected to the secondary pre-mixing device.

[0015] ② Series mode, the outlet of a single mixing device is connected to the water inlet of the next mixing device, and after being arranged in series from high to low, it is finally connected to the secondary pre-mixing device.

[0016] ③ Mixed mode, a combined mode in which parallel and series exist simultaneously.

[0017] (2) After the pre-mixed slurry is further mixed evenly in the secondary pre-mixing device, it enters the stirring and kneading device together with the main materials such as flour in the main material feed pipe, with the pre-mixed slurry on the outside and the main materials wrapped inside.

[0018] (3) The materials enter the reverse conveying section of the stirring and kneading device for preliminary mixing by reverse conveying. The length of the reverse conveying section is relatively short and the rotation speed is relatively slow. The materials enter the first forward conveying section below under the action of water flow and gravity, and then pass through the first forward conveying section, the whipping section, and the second forward conveying section in sequence. After being mixed evenly and mechanically whipped, they enter the rolling and conveying device through the dough discharge port.

[0019] (4) The dough forms a dough sheet under the action of the rolling device and is conveyed forward. After being rolled by the spiked roller, it is covered with small holes and uneven. Subsequently, other auxiliary materials such as crushed nuts, spices, and yeast are sprinkled according to the process, and the dough sheet continues to be conveyed into the dough sheet freezing device.

[0020] (5) After the rolling cutter cuts off the dough sheet, it continues to rotate in the reverse conveying direction. When it encounters the subsequent dough sheet, it rolls up a small section of the starting end upward. After the cutter rotates to the uppermost end, it stops. The dough sheet with the starting end rolled up upward continues to be conveyed and encounters the lowest driving roller. The dough sheet continues to roll up and encounters the upper driven roller. Under the combined action of gravity, the driving roller, and the driven roller, a dough roll is formed. At the same time, the liquid nitrogen nozzle sprays liquid nitrogen downward. The position where the dough roll contacts the liquid nitrogen is the top of the dough roll and is the reverse side of other auxiliary materials such as crushed nuts.

[0021] (6) The diameter of the dough roll continuously increases, and the driven roller continuously slides upward on the limit frame. The dough roll sequentially contacts all the rollers in the driving roller group. The driving and driven rollers roll the dough roll together. When the dough roll increases to meet the process requirements, the control device controls each mechanism to complete the following actions: First, the rolling cutter starts to rotate to complete the next cutting. Subsequently, the driving roller group rotates at an accelerated speed, pulling the remaining dough sheet to be rolled up into a complete dough roll at an accelerated speed, creating a distance from the next batch of dough sheets. The driving roller group is lifted backward, and the complete dough roll falls into the lower finished product box and is conveyed to the cold storage for freezing. Finally, the position of the driving roller group is reset, the rotation speed is reset, and the driven roller is reset under the action of gravity to process the next dough roll.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. Compared with the dough made at room temperature on-site, the common problem of frozen dough is the reduction of yeast activity. The present invention adopts the method of pressing the dough into a dough sheet and then spraying liquid nitrogen. Part of the liquid nitrogen is wrapped into the dough roll and evenly distributed in the dough in the form of tiny bubbles under the rolling of the driving and driven rollers. Nitrogen is insoluble in water and the bubbles are stable, which is a powerful supplement to the subsequent fermentation.

[0024] 2. The present invention can complete the rapid freezing of frozen dough, and the dough center quickly passes through the ice crystal maximum formation zone.

[0025] 3. The present invention can complete the continuous production of frozen dough, continuously carrying out the pre-mixing of auxiliary materials, dough modulation, rolling and forming, and rapid freezing processes.

[0026] 4. The present invention can meet the requirements of different processes through permutation and combination in the auxiliary material premixing link, which is convenient and flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0028] Figure 1 It is a schematic structural diagram of a continuous pre-cooled frozen dough processing device of the present invention;

[0029] Figure 2 It is a schematic structural diagram of the premixing device in Embodiment 1 of the present invention;

[0030] Figure 3 It is a schematic structural diagram of the stirring and kneading device in Embodiment 1 of the present invention;

[0031] Figure 4 It is a schematic structural diagram of the rolling and conveying device and the dough sheet freezing device in Embodiment 1 of the present invention;

[0032] Figure 5 It is a schematic structural diagram of the limit passive roller and the active roller group device in Embodiment 1 of the present invention;

[0033] Figures 6 - 10 It is a schematic diagram of the dough sheet rolling step in Embodiment 1 of the present invention;

[0034] Description of the reference numerals: premixing device 1, stirring and kneading device 2, rolling and conveying device 3, dough sheet freezing device 4, solid auxiliary material mixing device 5, liquid auxiliary material mixing device 6, secondary premixing device 7, main material inlet pipe 8, solid device water inlet pipe 9, solid auxiliary material pipe 10, middle outlet 11, solid mixed auxiliary material outlet pipe 12, liquid device water inlet pipe 13, liquid auxiliary material pipe 14, liquid mixed auxiliary material outlet pipe 15, mixing cylinder 16, discharging cylinder 17, reverse conveying section 18, first forward conveying section 19, whipping section 20, second forward conveying section 21, dough discharging port 22, rolling device 23, conveyor belt 24, spiked roller 25, auxiliary material spreading device 26, rolling cutter 27, limit passive roller 28, liquid nitrogen nozzle 29, active roller group 30, finished product box 31, limit frame 32, passive roller 33, active roller 34, power device 35, control device 36. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] Embodiment 1

[0037] As Figures 1 - 10 shown: A continuous pre-cooled frozen dough processing device includes a premixing device 1, a stirring and kneading device 2, a rolling and conveying device 3, and a dough-skin rolling and freezing device 4. The premixing device 1 is used to continuously premix water and auxiliary materials and then convey them to the stirring and kneading device 2 together with main materials such as flour; the stirring and kneading device 2 is used to mix, stir, and knead various auxiliary and main materials and then convey them to the rolling and conveying device 3; the rolling and conveying device 3 rolls the dough into a dough skin, further sprays auxiliary materials according to the process, and then conveys them to the dough-skin rolling and freezing device 4; the dough-skin rolling and freezing device 4 rolls the dough skin into a dough roll while spraying liquid nitrogen to complete the production of frozen dough.

[0038] The premixing device 1 includes a solid auxiliary material mixing device 5, a liquid auxiliary material mixing device 6, a secondary premixing device 7, and a main material feed pipe 8, and the main material feed pipe 8 is used for feeding main materials such as flour.

[0039] The solid auxiliary material mixing device 5 is in the shape of a circular cylinder, sealed at the bottom and open at the top, and is divided into three chambers, namely an inner chamber, a middle chamber, and an outer chamber, with three layers inside and outside; the solid device water inlet pipe 9 enters the middle chamber from the bottom, and the direction is tangent to the circle so that the water flow rotates in the middle chamber. The solid auxiliary material pipe 10 extends into the middle chamber from the top, and different numbers of solid auxiliary material pipes 10 are set according to the process requirements. The solid auxiliary materials fall into the water flow in the middle chamber for mixing. The upper middle part of the outer wall of the middle chamber is provided with a middle outlet 11, and the mixed auxiliary materials enter the outer chamber from the middle outlet 11, and the direction is tangent to the circle so that the auxiliary materials rotate in the outer chamber; the upper middle part of the outer wall of the outer chamber is provided with a solid mixed auxiliary material outlet pipe 12, and the further mixed auxiliary materials in the outer chamber enter the secondary premixing device 7 from the solid mixed auxiliary material outlet pipe 12. Different numbers of solid auxiliary material mixing devices 5 can be arranged and combined according to the process.

[0040] The liquid auxiliary material mixing device 6 is in the shape of a circular cylinder, sealed at the bottom and top, with the inner and outer layers divided into two chambers, the inner and the outer. The water inlet pipe 13 of the liquid device enters the outer chamber from the bottom, and the direction is tangent to the circle so that the water flows in a swirling motion in the outer chamber. Different numbers of liquid auxiliary material pipes 14 are set according to process requirements. The liquid auxiliary material pipes 14 are located at the other end of the circle of the water inlet pipe 13 of the liquid device, with the direction tangent to the circle and consistent with the water inlet pipe 13 of the liquid device, so that the liquid auxiliary materials and water are mixed and flow in a swirling motion in the outer chamber. The auxiliary materials mixed evenly in the outer chamber enter the secondary premixing device 7 through the liquid evenly mixed auxiliary material outlet pipe 15 located at the upper part. Different numbers of liquid auxiliary material mixing devices 6 can be arranged and combined according to the process.

[0041] The secondary premixing device 7 is sleeved outside the main material feeding pipe 8 and is composed of a mixing cylinder 16 and a discharging cylinder 17. The mixing cylinder 16 is wide at the top and narrow at the bottom and is located in the outermost layer. The discharging cylinder 17 is in the shape of a cylinder, with a diameter larger than that of the main material feeding pipe 8, and is sleeved on the main material feeding pipe 8 to form a certain gap. The highest point of the discharging cylinder 17 is lower than the highest point of the mixing cylinder 16. Various auxiliary materials enter the bottom of the mixing cylinder 16 through their respective inlet pipes for re-mixing. After the water level of the premixed slurry rises above the highest point of the discharging cylinder 17, it enters the gap and flows downward, and enters the stirring and kneading device 2 in a state where the premixed slurry wraps the main material at the outlet.

[0042] The main body of the stirring and kneading device 2 is a set of screw conveying device, which is composed of a reverse conveying section 18, a first forward conveying section 19, a whipping section 20, a second forward conveying section 21 and a dough discharging port 22. The reverse conveying section 18 is vertically arranged and connected to the bottom of the secondary premixing device 7, and reversely conveys the premixed slurry and the main material. After preliminary mixing, it enters the first forward conveying section 19 arranged horizontally below, and is further mixed evenly and then conveyed to the whipping section 20. The whipping section 20 is to install a certain number of whipping rods on the rotating shaft. The whipping rods rotate with the rotating shaft to mechanically whip the dough. After tearing and pulling, it enters the second forward conveying section 21, and finally enters the rolling and conveying device 3 through the dough discharging port 22 after being evenly mixed.

[0043] The rolling and conveying device 3 is composed of a rolling device 23, a conveyor belt 24, a spiked roller 25 and an auxiliary material spreading device 26. The rolling device 23 is located below the dough discharging port 22, rolls the dough into a dough sheet and then conveys it forward by the conveyor belt 24. The spiked roller 25 covered with spikes rolls the dough sheet on the conveyor belt 24. The auxiliary material spreading device 26 is located behind the spiked roller 25 and spreads auxiliary materials above the dough sheet according to process requirements.

[0044] The dough wrapper freezing device 4 is composed of a rolling cutter 27, a limiting passive roller 28, a liquid nitrogen nozzle 29, a set of driving rollers 30 and a finished product box 31. The rolling cutter 27 is composed of a roller and a cutter mounted on the roller, and is located above the conveyor belt 24 at a position where the dough wrapper can be cut off. As the cutter rotates with the roller to the lowest position to cut off the dough wrapper and then continues to rotate, a small section of the starting end of the subsequent dough wrapper is rolled up. The set of driving rollers 30 is composed of several driving rollers 34, a power device 35 and a control device 36. The driving rollers 34 rotate driven by the power device 35. According to process requirements, several driving rollers 34 form an arc-shaped roller set. The lowermost driving roller is located above the end of the conveyor belt 24 and contacts the dough wrapper being conveyed. The limiting passive roller 28 is composed of a limiting frame 32 and a passive roller 33. The two side brackets of the limiting frame 32 are provided with hollow long rectangular frames, and the passive roller 33 slides up and down in the long rectangular frames. According to process needs, several limiting passive rollers 28 are provided. A downward spraying liquid nitrogen nozzle 29 is arranged above the passive roller 33 closest to the set of driving rollers 30, and the liquid nitrogen nozzle 29 slides together with the passive roller 33. The control device 36 is used to control the actions of the conveyor belt 24, the rolling cutter 27, the liquid nitrogen nozzle 29 and the set of driving rollers 30.

[0045] A continuous pre-cooling and freezing dough processing method includes the following steps:

[0046] (1) Select wheat flour as the main ingredient. The solid auxiliary materials include sucrose, salt, yeast powder, emulsifier and dough improver. The liquid auxiliary materials include milk and liquid shortening. Select different mixing devices for permutation and combination (represented by capital letters A - F).

[0047] The solid auxiliary material mixing device (A) mixes the emulsifier, and then is connected in series to the liquid auxiliary material mixing device (B) to mix the liquid shortening. Then it is connected in series to the liquid auxiliary material mixing device (C) without auxiliary materials to further emulsify the mixture, and then connected to the secondary premixing device 7.

[0048] The solid auxiliary material mixing device (D) mixes sucrose, salt and dough improver, and then is connected in series to the liquid auxiliary material mixing device (E) to mix milk, and then connected to the secondary premixing device 7.

[0049] The solid auxiliary material mixing device (F) mixes the yeast powder, and then is connected to the secondary premixing device 7.

[0050] (2) After the premixed slurry is further mixed evenly in the secondary premixing device 7, it enters the stirring and kneading device 2 together with the main ingredients such as flour in the main ingredient feed pipe 8, with the premixed slurry on the outside and the main ingredients wrapped inside.

[0051] (3) The materials enter the reverse conveying section 18 of the stirring and kneading device 2 for preliminary mixing by reverse conveying. The length of the reverse conveying section 18 is relatively short and the rotational speed is relatively slow. The materials enter the lower first forward conveying section 19 under the action of water flow and gravity, and then pass through the first forward conveying section 19, the whipping section 20, and the second forward conveying section 21 in sequence. After being uniformly mixed and mechanically whipped, they enter the rolling and conveying device 3 through the dough discharge port 22.

[0052] (4) The dough forms a dough sheet under the action of the rolling device 23 and is conveyed forward. After being rolled by the spiked roller 25, it is covered with small holes and uneven. Subsequently, crushed nuts are scattered on the surface of the dough sheet, and the dough sheet continues to be conveyed into the dough sheet freezing device 4.

[0053] (5) After the rolling cutter 27 cuts the dough sheet, it continues to rotate in the reverse conveying direction. When it encounters the subsequent dough sheet, it rolls up a small section of the starting end upward. After the rolling cutter 27 rotates to the uppermost end, it stops. The dough sheet with the starting end rolled up upward continues to be conveyed and encounters the lowermost driving roller 34. The dough sheet continues to roll up and encounters the upper driven roller 33. Under the combined action of gravity, the driving roller 34, and the driven roller 33, a dough roll is formed. At the same time, the liquid nitrogen nozzle 29 sprays liquid nitrogen downward. The position where the dough roll contacts the liquid nitrogen is the top of the dough roll and is the reverse side of other accessories such as crushed nuts.

[0054] (6) The diameter of the dough roll continuously increases, and the driven roller 33 continuously slides upward on the limit frame 32. The dough roll sequentially contacts all the rollers in the driving roller group 30. The driving and driven rollers roll press the dough roll together. When the dough roll increases to meet the process requirements, the control device 36 controls each mechanism to complete the following actions: First, the rolling cutter 27 starts to rotate to complete the next cutting. Subsequently, the driving roller group 30 rotates at an accelerated speed, pulling the remaining dough sheet to be rolled up into a complete dough roll at an accelerated speed, and pulling away a certain distance from the next batch of dough sheets. The driving roller group 30 is lifted backward. After the complete dough roll falls into the lower finished product box 31, it is conveyed to the cold storage for freezing. Finally, the position of the driving roller group 30 is reset, the rotational speed is reset, and the driven roller 33 is reset under the action of gravity to process the next dough roll.

[0055] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claimed rights.

Claims

1. A continuous pre-cooling frozen dough processing method, characterized in that It includes the following steps: (1) Select auxiliary materials and main materials according to process requirements. The auxiliary materials are divided into solid auxiliary materials and liquid auxiliary materials, and are pre-mixed with water using a solid auxiliary material mixing device and a liquid auxiliary material mixing device respectively and then enter a secondary pre-mixing device. Different permutations and combinations of the mixing devices are carried out according to the different water solubility and emulsification process requirements of the auxiliary materials: ① Parallel mode, each mixing device is directly connected to the secondary pre-mixing device, ② Series mode, the outlet of a single mixing device is connected to the water inlet of the next mixing device, and after being arranged in series from high to low, it finally accesses the secondary pre-mixing device, ③ Mixed mode, a combined mode in which parallel and series exist simultaneously; (2) After the pre-mixed slurry is further mixed evenly in the secondary pre-mixing device, it enters the stirring and kneading device together with the flour main material in the main material feed pipe. The pre-mixed slurry is on the outside and the main material is wrapped inside; (3) The material enters the reverse conveying section of the stirring and kneading device and is preliminarily mixed by reverse conveying. The length of the reverse conveying section is relatively short and the rotation speed is relatively slow. The material enters the lower first forward conveying section under the action of water flow and gravity, and then passes through the first forward conveying section, the whipping section, and the second forward conveying section in sequence. After being mixed evenly and mechanically whipped, it enters the rolling and conveying device through the dough discharge port; (4) The dough forms a dough sheet under the action of the rolling device and is conveyed forward. After being rolled by the spiked roller, it is covered with small holes and uneven. Subsequently, crushed nuts, spices, and yeast auxiliary materials are sprinkled according to the process, and the dough sheet continues to be conveyed into the dough sheet freezing device; (5) After the rolling cutter cuts off the dough sheet, it continues to rotate in the reverse conveying direction. When it encounters the subsequent dough sheet, it rolls up a small section of the starting end upward. After the cutter rotates to the uppermost end, it stops. The dough sheet with the starting end rolled up upward continues to be conveyed and encounters the lowest driving roller. The dough sheet continues to roll up and encounters the upper driven roller. Under the combined action of gravity, the driving roller, and the driven roller, a dough roll is formed. At the same time, the liquid nitrogen nozzle sprays liquid nitrogen downward. The position where the dough roll contacts the liquid nitrogen is the top of the dough roll and is the reverse side of the crushed nut auxiliary material; (6) The diameter of the dough roll continues to increase, and the driven roller continuously slides upward on the limit frame. The dough roll sequentially contacts all the rollers in the driving roller group. The driving and driven rollers roll press the dough roll together. When the dough roll increases to meet the process requirements, the control device controls each mechanism to complete the following actions: First, the rolling cutter starts to rotate to complete the next cutting. Subsequently, the driving roller group rotates at an accelerated speed, pulling the remaining dough sheet to be rolled up into a complete dough roll at an accelerated speed, separating a certain distance from the next batch of dough sheets. The driving roller group is lifted backward, and the complete dough roll falls into the lower finished product box and is conveyed to the cold storage for freezing. Finally, the position of the driving roller group is reset, the rotation speed is reset, and the driven roller is reset under the action of gravity to process the next dough roll.

2. An apparatus for implementing the continuous pre-cooling frozen dough processing method according to claim 1, characterized in that, It includes a premixing device, a stirring and kneading device, a rolling and conveying device, and a dough wrapping and freezing device; the premixing device is used to continuously premix water and auxiliary materials and then convey them together with the main flour material to the stirring and kneading device; the stirring and kneading device is used to mix, stir and knead various auxiliary and main materials and then convey them to the rolling and conveying device; the rolling and conveying device rolls the dough into a dough sheet, further sprays auxiliary materials according to the process and then conveys it to the dough wrapping and freezing device; the dough wrapping and freezing device rolls the dough sheet into a dough roll while spraying liquid nitrogen to complete the production of frozen dough.

3. The apparatus for implementing the continuous pre-cooling frozen dough processing method according to claim 2, wherein, The said premixing device includes a solid auxiliary material mixing device, a liquid auxiliary material mixing device, a secondary premixing device and a main material feeding pipe, and the main material feeding pipe is used for feeding the main flour material; the solid auxiliary material mixing device is in the shape of a circular cylinder, sealed at the bottom and open at the top, and the inner and outer three layers are divided into three chambers: the inner chamber, the middle chamber and the outer chamber; the solid device water inlet pipe enters the middle chamber from the bottom, and the direction is tangent to the circle to make the water flow rotate in the middle chamber. The solid auxiliary material pipe extends into the middle chamber from the top, and different numbers of solid auxiliary material pipes are set according to the process requirements. The solid auxiliary materials fall into the water flow in the middle chamber for mixing. The upper middle part of the outer wall of the middle chamber is provided with a middle outlet, and the mixed auxiliary materials enter the outer chamber from the middle outlet, and the direction is tangent to the circle to make the auxiliary materials rotate in the outer chamber; the upper middle part of the outer wall of the outer chamber is provided with a solid mixed auxiliary material outlet pipe, and the auxiliary materials further mixed in the outer chamber enter the secondary premixing device from the solid mixed auxiliary material outlet pipe; different numbers of solid auxiliary material mixing devices are arranged and combined according to the process; The liquid auxiliary material mixing device is in the shape of a circular cylinder, sealed at the bottom and top, and the inner and outer two layers are divided into two chambers: the inner chamber and the outer chamber. The liquid device water inlet pipe enters the outer chamber from the bottom, and the direction is tangent to the circle to make the water flow rotate in the outer chamber; different numbers of liquid auxiliary material pipes are set according to the process requirements. The liquid auxiliary material pipes are located at the other end of the circle of the liquid device water inlet pipe, and the direction is tangent to the circle and consistent with the liquid device water inlet pipe, so that the liquid auxiliary materials are mixed with water and rotate in the outer chamber. The auxiliary materials mixed in the outer chamber enter the secondary premixing device from the liquid mixed auxiliary material outlet pipe located at the upper part. Different numbers of liquid auxiliary material mixing devices are arranged and combined according to the process; The secondary premixing device is sleeved outside the main material feeding pipe and consists of a mixing cylinder and a discharging cylinder. The mixing cylinder is wide at the top and narrow at the bottom and is located in the outermost layer. The discharging cylinder is in the shape of a cylinder, with a diameter larger than that of the main material feeding pipe, and is sleeved on the main material feeding pipe to form a gap. The highest point of the discharging cylinder is lower than the highest point of the mixing cylinder; various auxiliary materials enter the bottom of the mixing cylinder through their respective inlet pipes for re-mixing. When the water level of the premixed slurry rises above the highest point of the discharging cylinder, it enters the gap and flows downward, and enters the stirring and kneading device in the state of the premixed slurry wrapping the main material at the outlet.

4. The apparatus for implementing the continuous pre-cooling frozen dough processing method according to claim 2, wherein, The main body of the stirring and kneading device is a set of screw conveyor device, which consists of a reverse conveying section, a first forward conveying section, a whipping section, a second forward conveying section and a dough discharge port; the reverse conveying section is vertically arranged and connected to the bottom of the secondary premixing device, reversely conveys the premixed slurry and the main material, enters the horizontally arranged first forward conveying section below after preliminary mixing, and is further mixed evenly and then conveyed to the whipping section; the whipping section is to install whipping rods on the rotating shaft, and the whipping rods rotate with the rotating shaft to mechanically whip the dough, and after tearing, it enters the second forward conveying section, and after final mixing, it enters the rolling and conveying device through the dough discharge port.

5. The apparatus for implementing the continuous pre-cooling frozen dough processing method according to claim 2, characterized in that, The rolling and conveying device consists of a rolling device, a conveyor belt, a spiked roller and an auxiliary material spreading device; the rolling device is located below the dough discharge port, rolls the dough into a dough sheet and then conveys it forward by the conveyor belt, and the spiked roller covered with spikes rolls the dough sheet on the conveyor belt; the auxiliary material spreading device is located behind the spiked roller and spreads auxiliary materials above the dough sheet according to process requirements.

6. The apparatus for implementing the continuous pre-cooling frozen dough processing method according to claim 2, characterized in that, The dough sheet freezing device consists of a rolling cutter, a limit passive roller, a liquid nitrogen nozzle, a set of active rollers and a finished product box; the rolling cutter consists of a roller and a cutter installed on the roller, and is located above the conveyor belt at a position where the dough sheet can be cut off. The cutter rotates with the roller to the lowest position to cut off the dough sheet and then continues to rotate, rolling up a small section of the starting end of the subsequent dough sheet upward. The set of active rollers consists of several active rollers, a power device and a control device. The active rollers rotate driven by the power device. According to process requirements, several active rollers form an arc-shaped roller set. The lowest active roller is located above the end of the conveyor belt and contacts the dough sheet being conveyed; the limit passive roller consists of a limit frame and a passive roller. There are hollow long rectangular frames on both brackets of the limit frame, and the passive roller slides up and down in the long rectangular frame. According to process requirements, several limit passive rollers are set. A downward spraying liquid nitrogen nozzle is arranged above the passive roller closest to the set of active rollers, and the liquid nitrogen nozzle slides together with the passive roller; the control device is used to control the actions of the conveyor belt, the rolling cutter, the liquid nitrogen nozzle and the set of active rollers.

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