Low-temperature circulating pickling equipment for roast duck preparation

Abstract

The invention belongs to the technical field of food processing equipment, and particularly relates to roast duck preparation low-temperature circulation pickling equipment which comprises a rack, a roller is mounted on the rack, and a vacuum mechanism and a cooling mechanism are mounted in the rack; the roller is installed on the machine frame through an outer shaft, an inner shaft is concentrically installed in the outer shaft, and the transmission mechanism drives the outer shaft and the inner shaft to rotate reversely. Stirring blades are installed on the inner wall of the roller, an extrusion layer is installed on the surface of the inner shaft, a cavity is formed in the extrusion layer, and a gap for duck embryos to pass through exists between the extrusion layer and the stirring blades; the device is simple in structure, the extrusion layer expanding under vacuum can be matched with the stirring blades to extrude, rub and turn over duck embryos, the contact sufficiency between the duck embryos and pickling materials is improved, the duck embryos are promoted to absorb the pickling materials, and therefore the pickling effect of the duck embryos is improved, meanwhile, the stirring blades in the roller are not fixed, dead corners in the roller are avoided, and the service life of the duck embryos is prolonged. And the cleaning effect in the roller is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of food processing equipment, in particular to a low-temperature circulation marinating device for preparing roast duck. Background Art

[0002] In the process of making roast duck, marinating is also a very important step. By using different marinades, the duck meat absorbs the taste of the marinade, adding different flavors and aromas to the roast duck, thereby improving the taste of the roast duck. At the same time, in order to ensure that the roast duck is marinated and improve the taste of the roast duck, the time required for marinating the roast duck is relatively long. Therefore, in order to avoid excessively high temperatures during marination, which may cause the roast duck to deteriorate after being marinated for a long time, a vacuum tumbling machine is usually used to marinate the roast duck at a low temperature to speed up the marination and inhibit the reproduction of microorganisms during the marinating process, thereby ensuring the quality of the marinated roast duck.

[0003] The existing vacuum low-temperature tumbling machine usually tumbles the duck embryo in one direction during tumbling, so that the marinade can cover the surface of the duck embryo. Although it can achieve the effect of flavoring, the efficiency is not high and the tumbling effect is not ideal, which affects the quality of tumbling. At the same time, after the duck embryo is marinated, grease impurities will remain in the vacuum low-temperature tumbling machine, which is relatively difficult to clean, affecting the subsequent normal use of the equipment. Summary of the invention

[0004] In order to make up for the shortcomings of the prior art, an extrusion layer that expands under vacuum is used in conjunction with stirring blades to extrude, knead and flip the duck embryo, thereby improving the contact sufficiency between the duck embryo and the marinade, promoting the duck embryo to absorb the marinade, and thus improving the marinating effect of the duck embryo. At the same time, the stirring blades in the drum are not fixed to avoid dead corners in the drum and improve the cleaning effect in the drum. The present invention proposes a low-temperature circulation marinating equipment for preparing roast duck.

[0005] The technical solution adopted by the present invention to solve the technical problem is as follows: the low-temperature circulation marinating equipment for preparing roast duck comprises a frame, a drum is installed on the frame, a motor is installed in the frame, the motor drives the drum to rotate through a transmission mechanism, a vacuum mechanism and a cooling mechanism are installed in the frame, the vacuum mechanism evacuates the drum, and the cooling mechanism cools the drum; The drum is mounted on the frame via an outer shaft, an inner shaft is coaxially mounted inside the outer shaft, and the transmission mechanism drives the outer shaft and the inner shaft to rotate in opposite directions; A stirring blade is installed on the inner wall of the drum, an extrusion layer is installed on the surface of the inner shaft, a cavity is opened in the extrusion layer, and a gap is provided between the extrusion layer and the stirring blade for the duck embryo to pass through.

[0006] Preferably, a plurality of extrusion layers are mounted on the inner shaft, and the extrusion layers are mounted on a slip ring, and the slip ring and the inner shaft are connected to each other via a spline; Magnetic blocks are installed at the ends of the slip ring, and the magnetic blocks attract each other.

[0007] Preferably, an elastic sleeve is installed on the side of the stirring blade close to the inner shaft, and a containing groove is opened on the surface of the elastic sleeve.

[0008] Preferably, the opening of the containing groove is inclined to point in the direction of the extrusion layer.

[0009] Preferably, the thickness of the elastic sleeve is greater than the thickness of the side of the stirring blade close to the inner shaft, and the height of the stirring blade protruding from the side of the elastic sleeve where the holding groove is located is greater than the height of the stirring blade protruding from the other side of the elastic sleeve; The surfaces of the elastic sleeve and the extrusion layer are provided with evenly distributed protrusions.

[0010] Preferably, a connecting frame is installed on the outer shaft, and the stirring blade is installed on the connecting frame; The outer shaft is provided with a rotation groove, the connecting frame is provided with a sliding block, and the sliding block is slidably installed in the rotation groove.

[0011] Preferably, the connecting frame rotates in the rotating groove at an angle of at least 180 degrees.

[0012] Preferably, a connecting cavity is provided in the inner shaft, a water outlet hole is provided on the inner shaft, the water outlet hole and the connecting cavity are connected to each other, the water outlet hole is located between adjacent extrusion layers, and the connecting cavity is connected to an external water pump.

[0013] The beneficial effects of the present invention are as follows: 1. The low-temperature circulation marinating equipment for preparing roast duck described in the present invention comprises a stirring blade, an extrusion layer, an elastic sleeve and a containing tank, and utilizes the extrusion layer that expands under vacuum to cooperate with the stirring blade to extrude, knead and flip the duck embryo, and to make the duck embryo fully contact with the marinade, thereby promoting the duck embryo to absorb the marinade, thereby improving the marinating effect of the duck embryo. At the same time, the elasticity of the extrusion layer is utilized to ensure that the duck embryo is subjected to elastic force, thereby preventing the duck embryo from being damaged by forced extrusion or excessive extrusion, which affects the marinating effect and quality of the duck embryo after marinating.

[0014] 2. The low-temperature circulating marinating equipment for preparing roast duck described in the present invention can rotate the stirring blade relative to the drum by arranging the stirring blade, the connecting frame, the sliding block, the rotating groove and the water outlet hole. The stirring blade scrapes and cleans the inner wall of the drum, thereby improving the cleaning effect inside the drum and avoiding the stirring blade being fixedly installed in the drum, resulting in the occurrence of cleaning dead corners, resulting in poor cleaning effect of the marinating equipment or the presence of residual grease impurities, which affects the subsequent normal use of the marinating equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below in conjunction with the accompanying drawings.

[0016] Figure 1 is a front view of the pickling device of the present invention; Figure 2 It is a schematic diagram of the structure of the drum in the pickling equipment of the present invention; Figure 3 It is a partial structural schematic diagram of the stirring blade in the pickling equipment of the present invention; Figure 4 It is a schematic diagram of the structure of the extrusion layer in the pickling equipment of the present invention; Figure 5 It is a structural schematic diagram of a connecting frame in the pickling equipment of the present invention; Figure 6 yes Figure 3 A partial enlarged view of the middle part; Figure 7 yes Figure 4 A partial enlarged view of point B in the middle; H1 is the height of the elastic sleeve protruding above the stirring blade; In the figure: a frame 1, a drum 2, an outer shaft 21, a rotating groove 211, an inner shaft 22, a water outlet 221, a stirring blade 3, a connecting frame 31, a sliding block 311, an extrusion layer 4, a slip ring 41, an elastic sleeve 5, and a containing groove 51. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0018] like Figures 1 to 7 As shown, the roast duck preparation low-temperature circulation marinating equipment of the present invention comprises a frame 1, a drum 2 is mounted on the frame 1, a motor is mounted in the frame 1, the motor drives the drum 2 to rotate through a transmission mechanism, a vacuum mechanism and a cooling mechanism are mounted in the frame 1, the vacuum mechanism vacuumizes the drum 2, and the cooling mechanism cools the drum 2; The drum 2 is mounted on the frame 1 via an outer shaft 21, an inner shaft 22 is coaxially mounted inside the outer shaft 21, and the transmission mechanism drives the outer shaft 21 and the inner shaft 22 to rotate in opposite directions; A stirring blade 3 is installed on the inner wall of the drum 2, and an extrusion layer 4 is installed on the surface of the inner shaft 22. A cavity is opened in the extrusion layer 4, and there is a gap between the extrusion layer 4 and the stirring blade 3 for passing the duck embryo; During operation, after the duck embryos and marinade are fed into the drum 2, the controller controls the vacuum mechanism and the cooling mechanism to evacuate and cool the inside of the drum 2, so that the inside of the drum 2 is in a low temperature and vacuum state. Then, the controller controls the motor to move, and then drives the drum 2 to rotate through the transmission mechanism, so that the duck embryos in the drum 2 are lifted up by the stirring blades 3 and then fall down, so that the duck embryos collide and rub against each other, which promotes the duck embryos to absorb the marinade. At the same time, after the duck embryos are marinated, the controller controls the vacuum mechanism and the cooling mechanism to be closed, and then the drum 2 is opened, and the controller controls the motor to reversely operate, so as to drive the drum 2 to reverse and dump out the marinated duck embryos. At the same time, when the vacuum mechanism and cooling mechanism in the prior art evacuate and cool the inside of the drum 2, the pressure in the drum 2 will gradually decrease, so that the pressure in the cavity of the extrusion layer 4 increases relative to the pressure inside the drum 2, thereby causing the extrusion layer 4 to expand. When the duck embryo is driven by the stirring blade 3 and falls over the edge of the stirring blade 3, the duck embryo will pass through the gap between the stirring blade 3 and the extrusion layer 4. At this time, the duck embryo will be squeezed and kneaded by the extrusion layer 4, thereby promoting the duck embryo to absorb the marinade and improving the rolling, kneading and marinating effects of the duck embryo. At the same time, since the extrusion layer 4 expands under the vacuum state in the drum 2, the extrusion layer 4 in contact with the duck embryo has good elasticity. When the extrusion layer 4 extrudes and rubs the duck embryo, the force acting on the duck embryo is elastic force, which prevents the duck embryo from being forcedly squeezed or over-squeezed, resulting in damage to the duck embryo skin and the quality of the duck embryo, thereby affecting the pickling quality of the duck embryo. At the same time, since the rotation directions of the drum 2 and the inner shaft 22 are opposite, the duck embryo is promoted to turn over when it falls after being driven by the stirring blade 3, so that the duck embryo can be fully turned over and rolled in the drum 2, further making the contact between the duck embryo and the marinade more complete and uniform, so that the rolling and kneading effect of the duck embryo is better and the efficiency is faster; At the same time, when the extrusion layer 4 is not vacuumed in the drum 2, the extrusion layer 4 will not expand. At this time, the diameters of the inner shaft 22 and the extrusion layer 4 are relatively small and the space they occupy is small, so that the duck embryos and marinade will not be affected by the extrusion layer 4 when they are placed in, which makes it convenient for the staff to feed the marinating equipment. At the same time, after the marinating is completed and the vacuum in the drum 2 is released, the extrusion layer 4 also returns to its original state. When the marinated duck embryos are discharged, the gap between the extrusion layer 4 and the stirring blade 3 is relatively larger, which can also facilitate the discharge of the duck embryos.

[0019] As an embodiment of the present invention, a plurality of extrusion layers 4 are installed on the inner shaft 22, and the extrusion layers 4 are installed on a slip ring 41, and the slip ring 41 and the inner shaft 22 are connected to each other via a spline; Magnetic blocks are installed at the ends of the slip ring 41, and the magnetic blocks attract each other; When the duck embryos are put into the drum 2, the duck embryos are easily accumulated at the entrance of the drum 2. When the duck embryos are rolled and kneaded and marinated, blind spots are easily formed in the stacked duck embryos, resulting in poor rolling and kneading and marinating effects on some duck embryos. At this time, the height, width or thickness of the stacked duck embryos will be greater than the gap between the extrusion layer 4 and the stirring blade 3. Since the extrusion layer 4 is provided with multiple groups and the extrusion layer 4 can slide along the length direction of the inner shaft 22 under the action of the slip ring 41, the stacked duck embryos squeeze the adjacent extrusion layers 4 to both sides, making it convenient for the stacked duck embryos to pass through the gap between the extrusion layer 4 and the stirring blade 3, so that the duck embryos can fall down again and mix with the marinade, thereby avoiding the stacked duck embryos from not being able to pass through the gap between the extrusion layer 4 and the stirring blade 3, the duck embryos are driven by the stirring blade 3 to rotate in a circle or the stacked duck embryos are forced to pass through the gap between the extrusion layer 4 and the stirring blade 3, resulting in excessive extrusion and damage of the duck embryos, damage to the extrusion layer 4 or jamming of the inner shaft 22, affecting the rolling and kneading and marinating effects of the duck embryos and the normal operation of the marinating equipment; At the same time, during the rotation of the drum 2, the accumulated duck embryos will gradually disperse in the continuous falling process, so that the duck embryos can be fully pressed, kneaded, and mixed with the marinade, thereby improving the rolling, kneading, and marinating effects of the duck embryos. At the same time, when the duck embryos are not squeezed toward both sides of the adjacent extrusion layers 4, under the action of the magnetic blocks on the slip ring 41, the extrusion layers 4 are moved closer to each other and restored to their original state.

[0020] As an embodiment of the present invention, an elastic sleeve 5 is installed on the side of the stirring blade 3 close to the inner shaft 22, and a receiving groove 51 is opened on the surface of the elastic sleeve 5; By installing the elastic sleeve 5 on the stirring blade 3, the duck embryo will contact the elastic sleeve 5 and the squeezing layer 4 when falling downward, thereby preventing the duck embryo from directly contacting the metal component or hard surface when being squeezed and kneaded, so as to prevent the surface of the duck embryo from being crushed and affecting the pickling quality of the duck embryo; At the same time, since the rotation speed of the drum 2 is relatively slow, the centrifugal force on the marinade is relatively small, so that most of the marinade is gathered at the bottom of the drum 2, which will affect the contact between the duck embryo and the marinade, resulting in poor marinating efficiency of the duck embryo. Therefore, by providing the containing groove 51, when the stirring blade 3 drives the duck embryo to move upward, it will also bring up a part of the marinade located at the bottom of the drum 2, and then when the duck embryo falls downward and is squeezed and kneaded by the squeezing layer 4, the marinade can flow onto the duck embryo in time, thereby promoting the duck embryo to absorb the marinade under squeezing and kneading, and improving the rolling, kneading and marinating effect of the duck embryo.

[0021] As an embodiment of the present invention, the opening of the containing groove 51 is tilted and points in the direction of the extrusion layer 4; After the holding groove 51 is formed on the elastic sleeve 5, the elastic sleeve 5 can be more elastically deformed when the duck embryo is squeezed and kneaded, thereby ensuring that the duck embryo is subjected to elastic force when pressed, further avoiding the duck embryo from being crushed and affecting the quality of the duck embryo after pickling; At the same time, when the duck embryo is squeezed, the elastic sleeve 5 and the containing groove 51 are also squeezed, so that the marinade in the containing groove 51 is squeezed out. After the marinade is squeezed and flies out toward the squeezing layer 4, the marinade will be evenly distributed and sprinkled on the surface of the duck embryo, promoting the duck embryo to absorb the marinade, thereby avoiding the marinade in the containing groove 51 from simply flowing out and dripping. The marinade cannot contact the duck embryo, which affects the pickling effect of the duck embryo.

[0022] As an embodiment of the present invention, the thickness of the elastic sleeve 5 is greater than the thickness of the side of the stirring blade 3 close to the inner shaft 22, and the height of the stirring blade 3 protruding from the side where the groove 51 is located on the elastic sleeve 5 is greater than the height of the stirring blade 3 protruding from the other side of the elastic sleeve 5; The elastic sleeve 5 and the extrusion layer 4 are provided with evenly distributed protrusions on their surfaces; Since the thickness of the elastic sleeve 5 is relatively large, the contact area between the duck embryo and the elastic sleeve 5, and between the duck embryo and the extrusion layer 4 is increased, thereby extending the time when the duck embryo is squeezed and kneaded, and the duck embryo is fully turned over, thereby improving the rolling and tumbling effect of the duck embryo, and further improving the marinating effect of the duck embryo; At the same time, by providing the protrusions, the friction force on the duck embryo is relatively large when the duck embryo is squeezed and kneaded, so as to prevent the squeezing layer 4 or the elastic sleeve 5 from slipping on the surface of the duck embryo when the duck embryo is squeezed, kneaded or turned over, thereby affecting the squeezing and kneading of the duck embryo or affecting the duck embryo from falling downward through the gap between the squeezing layer 4 and the stirring blade 3; At the same time, since the height of the protrusion above the elastic sleeve 5 is relatively large, that is, H1 is greater than H2, when the stirring blade 3 rotates, there will be a relatively large area above the elastic sleeve 5 and the stirring blade 3, and then cooperate with the containing groove 51 to move more marinade upward, and smear the squeezed duck embryo, so that the contact between the duck embryo and the marinade is more complete, thereby improving the marinating effect of the duck embryo.

[0023] As an embodiment of the present invention, a connecting frame 31 is installed on the outer shaft 21, and the stirring blade 3 is installed on the connecting frame 31; The outer shaft 21 is provided with a rotation groove 211, and the connecting frame 31 is provided with a slider 311, and the slider 311 is slidably installed in the rotation groove 211; Since the stirring blade 3 is installed on the portion of the outer shaft 21 located in the drum 2 through the connecting frame 31, and the slider 311 on the connecting frame 31 is installed in the rotating groove 211, when the duck embryo is marinated, the connecting frame 31 will rotate relative to the outer shaft 21 under the action of inertia until the slider 311 moves to one end of the rotating groove 211, and then the connecting frame 31 and the stirring blade 3 will be stuck, so that the drum 2 and the stirring blade 3 rotate synchronously, stirring the duck embryo in the drum 2, and promoting the marination of the duck embryo; At the same time, when the duck embryo is marinated and the marinating equipment is cleaned, the drum 2 is rotated forward and reversely under the control of the controller. At this time, due to the inertia of the stirring blade 3, the stirring blade 3 will rotate relative to the drum 2, avoiding the stirring blade 3 being fixedly installed in the drum 2, resulting in a cleaning dead corner in the drum 2, making it difficult to clean up residual grease and other impurities, affecting the subsequent normal use of the marinating equipment.

[0024] As an embodiment of the present invention, the connecting frame 31 rotates in the rotation slot 211 at an angle of at least 180 degrees; Since the rotation angle of the rotating groove 211 is at least 180 degrees, when the drum 2 rotates back and forth, the stirring blade 3 can contact the inner wall of the drum 2 within a range of 360 degrees under the action of inertia. Therefore, when cleaning the pickling equipment, the stirring blade 3 can be used to fully scrape and clean the inner wall of the drum 2, and the cleaning dead corners in the drum 2 can be fully avoided, thereby improving the cleaning effect of the pickling equipment and avoiding impurities such as grease remaining in the drum 2, which affects the subsequent normal use of the pickling equipment.

[0025] As an embodiment of the present invention, a connecting cavity is provided in the inner shaft 22, a water outlet hole 221 is provided on the inner shaft 22, the water outlet hole 221 is connected to the connecting cavity, the water outlet hole 221 is located between adjacent extrusion layers 4, and the connecting cavity is connected to an external water pump; When cleaning the pickling equipment, clean water is pumped into the communicating cavity through an external water pump, and then sprayed into the drum 2 from the water outlet hole 221. In conjunction with the forward and reverse reciprocating rotation of the drum 2, the inner wall of the drum 2 is fully cleaned, thereby improving the cleaning effect of the drum 2. At the same time, since the water outlet hole 221 is located between two adjacent extrusion layers 4, when the drum 2 is opened and the extrusion layer 4 has not expanded, the sprayed water mist will clean the side surfaces between the adjacent extrusion layers 4, thereby further avoiding residual grease on the side surfaces between the extrusion layers 4, which affects the cleaning effect of the pickling equipment.

[0026] The specific workflow is as follows: During operation, after the duck embryos and marinade are fed into the drum 2, the controller controls the vacuum mechanism and the cooling mechanism to evacuate and cool the inside of the drum 2, so that the inside of the drum 2 is in a low temperature and vacuum state. Then, the controller controls the motor to move, and then drives the drum 2 to rotate through the transmission mechanism, so that the duck embryos collide and rub against each other. At the same time, after the duck embryos are marinated, the controller controls the vacuum mechanism and the cooling mechanism to be closed, and then the drum 2 is opened, and the controller controls the motor to run in reverse, so as to drive the drum 2 to reverse and pour out the marinated duck embryos. At the same time, when the inside of the drum 2 is evacuated, the pressure inside the drum 2 will gradually decrease, so that the pressure inside the cavity of the squeezing layer 4 increases relative to the pressure inside the drum 2, thereby causing the squeezing layer 4 to expand. When the duck embryo is driven by the stirring blade 3 and falls over the edge of the stirring blade 3, the duck embryo will pass through the gap between the stirring blade 3 and the squeezing layer 4, and at this time, the duck embryo will be squeezed and kneaded by the squeezing layer 4; At the same time, since the extrusion layer 4 expands under the vacuum state in the drum 2, the extrusion layer 4 in contact with the duck embryo has good elasticity. When the extrusion layer 4 extrudes and rubs the duck embryo, the force acting on the duck embryo is elastic force. At the same time, since the rotation directions of the drum 2 and the inner shaft 22 are opposite, the duck embryos are facilitated to turn over when they are driven by the stirring blades 3 and fall, so that the duck embryos can be fully turned over and rolled in the drum 2; At the same time, when the extruded layer 4 is not vacuumed in the drum 2, the extruded layer 4 will not expand. At this time, the diameters of the inner shaft 22 and the extruded layer 4 are relatively small, and the space occupied is small, which is convenient for the staff to feed materials into the pickling equipment. At the same time, after the pickling is completed and the vacuum in the drum 2 is released, the extruded layer 4 also returns to its original state, and the gap between the extruded layer 4 and the stirring blade 3 is relatively larger, which is convenient for the discharge of the duck embryo; Since there are multiple groups of extrusion layers 4 and the extrusion layers 4 can slide along the length direction of the inner shaft 22 under the action of the sliding ring 41, the accumulated duck embryos squeeze the adjacent extrusion layers 4 to both sides, making it convenient for the accumulated duck embryos to pass through the gap between the extrusion layers 4 and the stirring blades 3; At the same time, when the duck embryo does not squeeze the adjacent extrusion layers 4 to both sides, under the action of the magnetic block on the slip ring 41, the extrusion layers 4 move closer to each other and return to their original state; By installing an elastic sleeve 5 on the stirring blade 3, the duck embryo will contact the elastic sleeve 5 and the extrusion layer 4 when falling downward; At the same time, by providing the containing groove 51, when the stirring blade 3 drives the duck embryo to move upward, a part of the marinade at the bottom of the drum 2 will also be brought upward, and then when the duck embryo falls downward and is squeezed and kneaded by the squeezing layer 4, the marinade can flow onto the duck embryo in time; At the same time, when the duck embryo is squeezed, the elastic sleeve 5 and the containing groove 51 are also squeezed, so that the marinade in the containing groove 51 is squeezed out. After the marinade is squeezed out toward the squeezing layer 4, the marinade is evenly distributed and sprinkled on the surface of the duck embryo. Since the thickness of the elastic sleeve 5 is relatively large, the contact area between the duck embryo and the elastic sleeve 5, and between the duck embryo and the extrusion layer 4 is increased, thereby extending the time when the duck embryo is squeezed and kneaded, and the duck embryo is fully turned over; At the same time, by providing the protrusions, the friction force on the duck embryo is relatively large when the duck embryo is squeezed and kneaded, thereby preventing the squeezing layer 4 or the elastic sleeve 5 from slipping on the surface of the duck embryo when the duck embryo is squeezed, kneaded or turned over; At the same time, since the height of the protrusion above the elastic sleeve 5 is relatively large, that is, H1 is greater than H2, when the stirring blade 3 rotates, there will be a relatively large area above the elastic sleeve 5 and the stirring blade 3, and then cooperate with the containing groove 51 to move more marinade upward to smear the duck embryo when it is squeezed; Since the stirring blade 3 is installed on the portion of the outer shaft 21 located in the drum 2 through the connecting frame 31, and the slider 311 on the connecting frame 31 is installed in the rotating groove 211, when the duck embryo is pickled, the connecting frame 31 will rotate relative to the outer shaft 21 under the action of inertia until the slider 311 moves to one end of the rotating groove 211, and then the connecting frame 31 and the stirring blade 3 will be stuck, so that the drum 2 and the stirring blade 3 rotate synchronously to stir the duck embryo in the drum 2; At the same time, when the duck embryo is marinated and the marinating equipment is cleaned, the drum 2 is rotated forward and reversely under the control of the controller. At this time, due to the inertia of the stirring blade 3, the stirring blade 3 will rotate relative to the drum 2, so as to avoid the stirring blade 3 being fixedly installed in the drum 2, resulting in a cleaning dead corner in the drum 2; Since the rotation angle of the rotating groove 211 is at least 180 degrees, when the drum 2 rotates back and forth, the stirring blade 3 can contact the inner wall of the drum 2 within a range of 360 degrees under the action of inertia, so that when cleaning the pickling equipment, the stirring blade 3 can be used to fully scrape and clean the inner wall of the drum 2, and the cleaning dead corner in the drum 2 can be fully avoided; When cleaning the pickling equipment, clean water is pumped into the connecting cavity through an external water pump, and then sprayed into the drum 2 from the water outlet hole 221. In conjunction with the reciprocating rotation of the drum 2, the inner wall of the drum 2 is fully cleaned. At the same time, since the water outlet hole 221 is located between two adjacent extrusion layers 4, when the drum 2 is opened and the extrusion layer 4 has not expanded, the sprayed water mist will clean the sides between the adjacent extrusion layers 4.

[0027] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A low-temperature circulation marinating device for preparing roast duck, comprising a frame (1), a drum (2) being mounted on the frame (1), a motor being mounted in the frame (1), the motor driving the drum (2) to rotate via a transmission mechanism, a vacuum mechanism and a cooling mechanism being mounted in the frame (1), the vacuum mechanism evacuating the drum (2), and the cooling mechanism cooling the drum (2); Features: The roller (2) is mounted on the frame (1) via an outer shaft (21), an inner shaft (22) is coaxially mounted inside the outer shaft (21), and the transmission mechanism drives the outer shaft (21) and the inner shaft (22) to rotate in opposite directions; A stirring blade (3) is installed on the inner wall of the drum (2), an extrusion layer (4) is installed on the surface of the inner shaft (22), a cavity is opened in the extrusion layer (4), and a gap is provided between the extrusion layer (4) and the stirring blade (3) for the duck embryo to pass through.

2. The low-temperature circulation marinating equipment for preparing roast duck according to claim 1, characterized in that: A plurality of extrusion layers (4) are mounted on the inner shaft (22), and the extrusion layers (4) are mounted on a slip ring (41), and the slip ring (41) and the inner shaft (22) are connected to each other via a spline; Magnetic blocks are installed at the ends of the slip ring (41), and the magnetic blocks attract each other.

3. The low-temperature circulation marinating equipment for preparing roast duck according to claim 1, characterized in that: An elastic sleeve (5) is installed on the side of the stirring blade (3) close to the inner shaft (22), and a containing groove (51) is provided on the surface of the elastic sleeve (5).

4. The low-temperature circulation marinating equipment for preparing roast duck according to claim 3, characterized in that: The opening of the containing groove (51) is inclined to point in the direction of the extrusion layer (4).

5. The low-temperature circulation marinating equipment for preparing roast duck according to claim 3, characterized in that: The thickness of the elastic sleeve (5) is greater than the thickness of the side of the stirring blade (3) close to the inner shaft (22), and the height of the stirring blade (3) protruding from the side of the elastic sleeve (5) where the receiving groove (51) is located is greater than the height of the stirring blade (3) protruding from the other side of the elastic sleeve (5); Evenly distributed protrusions are arranged on the surfaces of the elastic sleeve (5) and the extrusion layer (4).

6. The low-temperature circulation marinating equipment for preparing roast duck according to claim 1, characterized in that: A connecting frame (31) is mounted on the outer shaft (21), and the stirring blade (3) is mounted on the connecting frame (31); The outer shaft (21) is provided with a rotation groove (211), and the connecting frame (31) is provided with a sliding block (311), and the sliding block (311) is slidably installed in the rotation groove (211).

7. The low-temperature circulation marinating equipment for preparing roast duck according to claim 6, characterized in that: The connecting frame (31) rotates in the rotating groove (211) at an angle of at least 180 degrees.

8. The low-temperature circulation marinating equipment for preparing roast duck according to claim 2, characterized in that: A connecting cavity is provided in the inner shaft (22), a water outlet hole (221) is provided on the inner shaft (22), the water outlet hole (221) and the connecting cavity are connected to each other, the water outlet hole (221) is located between adjacent extrusion layers (4), and the connecting cavity is connected to an external water pump.

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