Low-temperature circulation pickling equipment for roast duck preparation

Abstract

The application belongs to the technical field of food processing equipment, and particularly relates to a low-temperature circulating pickling equipment for preparing roasted duck, which comprises a rack, a roller installed on the rack, a vacuum mechanism and a cooling mechanism installed in the rack, an outer shaft on which the roller is installed, an inner shaft concentrically installed in the outer shaft, a transmission mechanism for driving the outer shaft and the inner shaft to rotate reversely, stirring blades installed on the inner wall of the roller, an extrusion layer installed on the surface of the inner shaft, a cavity formed in the extrusion layer, and a gap for passing duck embryos between the extrusion layer and the stirring blades. The low-temperature circulating pickling equipment for preparing roasted duck has a simple structure, and the duck embryos can be extruded, kneaded and turned over by the extrusion layer expanded under vacuum and the stirring blades, so that the contact between the duck embryos and the pickling materials is improved, the absorption of the pickling materials by the duck embryos is promoted, the pickling effect of the duck embryos is improved, and the stirring blades in the roller are not fixed, so that the cleaning effect in the roller is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of food processing equipment, and particularly relates to a low-temperature circulating marinating equipment for roast duck preparation. BACKGROUND

[0002] In the process of roast duck preparation, marinating is also a very important step. By using different marinades, the duck meat can absorb the flavor of the marinade, add different flavors and aromas to the roast duck, and thus improve the taste of the roast duck. In order to ensure that the roast duck is marinated to taste and improve the taste of the roast duck, the marinating time of the roast duck is relatively long. Therefore, in order to avoid the roast duck from deteriorating due to high temperature during marinating, a vacuum tumbling machine is usually used to marinate the roast duck at low temperature, so as to speed up the marinating speed and inhibit the reproduction of microorganisms in 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 to enable the marinade to cover the surface of the duck embryo. Although the marinating effect can be achieved, the efficiency is low and the tumbling effect is not ideal, which affects the quality of tumbling. In addition, after the duck embryo is marinated, oil impurities are usually left in the vacuum low-temperature tumbling machine, which is relatively difficult to clean, and thus affects the subsequent normal use of the equipment. SUMMARY

[0004] In order to make up for the shortcomings of the prior art, the expanded extrusion layer under vacuum is used in cooperation with the stirring blade to extrude, rub and turn the duck embryo, improve the contact between the duck embryo and the marinade, promote the absorption of the marinade by the duck embryo, and thus improve the marinating effect of the duck embryo. In addition, the stirring blade in the drum is not fixed, so as to avoid the existence of dead angles in the drum and improve the cleaning effect in the drum. The application provides a low-temperature circulating marinating equipment for roast duck preparation.

[0005] The technical scheme adopted by the application to solve the technical problems is as follows: the low-temperature circulating marinating equipment for roast duck preparation comprises a rack, a drum installed on the rack, a motor installed in the rack, a transmission mechanism for driving the drum to rotate, a vacuum mechanism and a cooling mechanism installed in the rack, and the vacuum mechanism is used to vacuumize the drum, and the cooling mechanism is used to cool the drum.

[0006] The drum is installed on the rack through an outer shaft, an inner shaft is installed concentrically in the outer shaft, and the transmission mechanism drives the outer shaft and the inner shaft to rotate in opposite directions.

[0007] The inner wall of the drum is provided with a stirring blade, the surface of the inner shaft is provided with an extrusion layer, a cavity is formed in the extrusion layer, and a gap through which the duck embryo passes exists between the extrusion layer and the stirring blade.

[0008] Preferably, a plurality of extrusion layers are arranged on the inner shaft, and the extrusion layers are arranged on the sliding ring, and the sliding ring and the inner shaft are connected through the spline.

[0009] The end of the sliding ring is provided with a magnetic block, and the magnetic blocks attract each other.

[0010] Preferably, an elastic sleeve is arranged on the side of the stirring blade close to the inner shaft, and a containing groove is arranged on the surface of the elastic sleeve.

[0011] Preferably, the opening of the containing groove is inclined to the direction of the extrusion layer.

[0012] 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 side of the elastic sleeve on which the containing groove is arranged protruding the stirring blade is greater than the height of the other side of the elastic sleeve protruding the stirring blade.

[0013] The surface of the elastic sleeve and the extrusion layer is provided with uniformly distributed protrusions.

[0014] Preferably, a connecting frame is arranged on the outer shaft, and the stirring blade is arranged on the connecting frame.

[0015] A rotating groove is arranged on the outer shaft, and a sliding block is arranged on the connecting frame and slidingly arranged in the rotating groove.

[0016] Preferably, the angle of rotation of the connecting frame in the rotating groove is at least 180 degrees.

[0017] Preferably, a communication cavity is arranged in the inner shaft, and a water outlet hole is arranged on the inner shaft and communicates with the communication cavity, the water outlet hole is located between adjacent extrusion layers, and the communication cavity communicates with the water pump.

[0018] The beneficial effects of the present application are as follows:

[0019] 1. The low-temperature circulating pickling equipment for preparing roasted duck, by arranging the stirring blade, the extrusion layer, the elastic sleeve and the containing groove, the duck embryo is extruded, rubbed and turned over by the extrusion layer expanding under vacuum and the stirring blade, and the duck embryo is fully contacted with the pickling material, so that the absorption of the duck embryo to the pickling material is promoted, thereby improving the pickling effect of the duck embryo, and the elastic effect of the duck embryo is ensured by the elasticity of the extrusion layer, so that the duck embryo is not damaged by forced extrusion and excessive extrusion, and the pickling effect of the duck embryo and the quality after pickling are affected.

[0020] 2. The low-temperature circulating marinating equipment for preparing roast duck described in the present invention enables the stirring blades to rotate relative to the drum by arranging stirring blades, a connecting frame, a slider, a rotating groove and a water outlet hole. The stirring blades scrape and clean the inner wall of the drum, thereby improving the cleaning effect inside the drum and avoiding the stirring blades fixedly installed in the drum, which leads to dead corners for cleaning, poor cleaning effect of the marinating equipment or residual grease impurities, affecting the subsequent normal use of the marinating equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] Figure 1 It is a front view of the pickling device of the present invention;

[0023] Figure 2 It is a schematic structural diagram of the drum in the pickling equipment of the present invention;

[0024] Figure 3 It is a partial structural diagram of the stirring blade in the pickling equipment of the present invention;

[0025] Figure 4 It is a schematic structural diagram of the extrusion layer in the pickling equipment of the present invention;

[0026] Figure 5 It is a structural schematic diagram of the connecting frame in the pickling equipment of the present invention;

[0027] Figure 6 yes Figure 3 A partial enlarged view of the middle part;

[0028] 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;

[0029] In the figure: frame 1, drum 2, outer shaft 21, rotating groove 211, inner shaft 22, water outlet 221, stirring blade 3, connecting frame 31, slider 311, extrusion layer 4, slip ring 41, elastic sleeve 5, containing groove 51. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0031] like Figures 1 to 7 As shown, the low-temperature circulation marinating equipment for preparing roast duck 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 draws a vacuum in the drum 2, and the cooling mechanism cools the drum 2;

[0032] The roller 2 is installed on the frame 1 through an outer shaft 21, an inner shaft 22 is concentrically installed in the outer shaft 21, and the transmission mechanism drives the outer shaft 21 and the inner shaft 22 to rotate in opposite directions;

[0033] The inner wall of the roller 2 is provided with stirring blades 3, the surface of the inner shaft 22 is provided with an extrusion layer 4, a cavity is formed in the extrusion layer 4, and the stirring blades 3 and the extrusion layer 4 are separated by a gap;

[0034] In operation, after the duck embryos and the marinade are fed into the roller 2, the vacuum mechanism and the cooling mechanism are controlled by the controller to perform vacuumization and cooling on the inside of the roller 2, so that the inside of the roller 2 is in a low-temperature and vacuum state, then the motor is controlled by the controller to rotate, and the roller 2 is driven by the transmission mechanism to rotate, so that the duck embryos in the roller 2 are lifted by the stirring blades 3 and then fall, so that the duck embryos collide and rub with each other, and the absorption of the marinade by the duck embryos is promoted, and at the same time, after the duck embryos are marinated, the vacuum mechanism and the cooling mechanism are closed by the controller, then the roller 2 is opened, and the motor is controlled by the controller to rotate in the opposite direction, so that the duck embryos marinated are poured out by the reverse rotation of the roller 2;

[0035] At the same time, when the vacuum mechanism and the cooling mechanism in the prior art perform vacuumization and cooling on the inside of the roller 2, the pressure in the roller 2 gradually decreases, the pressure in the cavity of the extrusion layer 4 is relatively increased compared with the pressure in the inside of the roller 2, and then the extrusion layer 4 expands, when the duck embryos are lifted by the stirring blades 3 and fall downward beyond the edges of the stirring blades 3, the duck embryos pass through the gap between the stirring blades 3 and the extrusion layer 4, at this time, the duck embryos are extruded and rubbed by the extrusion layer 4, so as to promote the absorption of the marinade by the duck embryos and improve the rolling and marinating effect of the duck embryos;

[0036] At the same time, since the extrusion layer 4 expands under the vacuum state in the roller 2, the extrusion layer 4 in contact with the duck embryos has good elasticity, when the duck embryos are extruded and rubbed by the extrusion layer 4, the force acting on the duck embryos is elastic force, so as to avoid that the duck embryos are forced to extrude and excessively extrude, which causes damage to the epidermis of the duck embryos and affects the marinating quality of the duck embryos;

[0037] At the same time, since the rotation directions of the roller 2 and the inner shaft 22 are opposite, the rotation directions promote the turning of the duck embryos when the duck embryos are lifted by the stirring blades 3 and fall, so that the duck embryos can be fully turned and rolled in the roller 2, and the contact between the duck embryos and the marinade is more sufficient and uniform, so as to make the rolling effect of the duck embryos better and the efficiency faster;

[0038] Meanwhile, when the extrusion layer 4 is not vacuumized in the roller 2, the extrusion layer 4 will not expand, at this time, the inner shaft 22 and the extrusion layer 4 have a relatively small diameter and occupy a small space, so that the duck embryo and the marinade will not be affected by the extrusion layer 4 when being put in, and the staff can conveniently put the materials in the marinating equipment, and after the marinating is completed and the vacuum in the roller 2 is released, the extrusion layer 4 also returns to the original state, and when the marinated duck embryo is discharged, the gap between the extrusion layer 4 and the stirring blade 3 is relatively larger, so that the duck embryo can be conveniently discharged.

[0039] As an embodiment of the present application, a plurality of extrusion layers 4 are mounted on the inner shaft 22, the extrusion layers 4 are mounted on the sliding ring 41, and the sliding ring 41 and the inner shaft 22 are connected by spline;

[0040] The end of the sliding ring 41 is provided with a magnetic block, and the magnetic blocks are attracted to each other;

[0041] When the duck embryo is put into the roller 2, the duck embryo is easily accumulated at the entrance of the roller 2, and when the duck embryo is rolled and marinated, the stacked duck embryo is easy to have a blind area, so that the rolling and marinating effect of part of the duck embryo is poor, at this time, the height or width or thickness of the accumulated duck embryo is greater than the gap between the extrusion layer 4 and the stirring blade 3, and since the extrusion layer 4 is provided with a plurality of groups and can slide along the length direction of the inner shaft 22 under the action of the sliding ring 41, the accumulated duck embryo will push the adjacent extrusion layer 4 to both sides, so that the accumulated duck embryo can pass through the gap between the extrusion layer 4 and the stirring blade 3, the duck embryo can fall down again and mix with the marinade, so that the accumulated duck embryo cannot pass through the gap between the extrusion layer 4 and the stirring blade 3, the duck embryo is driven to rotate by the stirring blade 3 or the accumulated duck embryo forcibly passes through the gap between the extrusion layer 4 and the stirring blade 3, which causes the duck embryo to be damaged by excessive extrusion, the extrusion layer 4 to be damaged or the inner shaft 22 to be stuck, and affects the rolling and marinating effect of the duck embryo and the normal operation of the marinating equipment;

[0042] Meanwhile, during the rotation of the roller 2, the accumulated duck embryo will gradually disperse in the process of falling, so that the duck embryo is fully pressed, rolled, and mixed with the marinade, the rolling and marinating effect of the duck embryo is improved, and when the duck embryo does not push the adjacent extrusion layer 4 to both sides, the extrusion layers 4 are close to each other under the action of the magnetic blocks on the sliding ring 41 and return to the original state.

[0043] As an embodiment of the present application, the side surface of the stirring blade 3 close to the inner shaft 22 is provided with an elastic sleeve 5, and a containing groove 51 is formed in the surface of the elastic sleeve 5;

[0044] By mounting the elastic sleeve 5 on the stirring blade 3, the duck embryo will contact the elastic sleeve 5 and the extrusion layer 4 when falling down, so that the duck embryo is avoided from directly contacting the metal member or the hard surface when being extruded and rolled, so as to avoid the surface of the duck embryo being damaged and affecting the marinating quality of the duck embryo.

[0045] Meanwhile, since the speed of the rotating drum 2 is relatively slow, the centrifugal force received by the pickling material is relatively small, so that the pickling material is mostly gathered at the bottom of the drum 2, thereby affecting the contact between the duck embryo and the pickling material, resulting in poor pickling efficiency of the duck embryo. Therefore, by arranging the holding groove 51, when the stirring blade 3 drives the duck embryo to move upward, a part of the pickling material located at the bottom of the drum 2 is also lifted upward, and then when the duck embryo falls downward and is extruded and rubbed by the extrusion layer 4, the pickling material can flow onto the duck embryo in time, thereby promoting the absorption of the pickling material by the duck embryo under extrusion and rubbing, improving the rolling and rubbing effect of the duck embryo, and further improving the pickling effect of the duck embryo.

[0046] As an embodiment of the present application, the opening of the holding groove 51 is inclined to the direction of the extrusion layer 4;

[0047] After the holding groove 51 is arranged on the elastic sleeve 5, the elastic sleeve 5 can be deformed more elastically when the duck embryo is extruded and rubbed, thereby ensuring that the duck embryo receives elastic force when it is pressed, further avoiding damage to the duck embryo and affecting the quality of the duck embryo after pickling;

[0048] Meanwhile, when the duck embryo is extruded, the elastic sleeve 5 and the holding groove 51 are also extruded, so that the pickling material in the holding groove 51 is extruded out. After the pickling material is extruded and flown out in the direction of the extrusion layer 4, the pickling material is uniformly distributed and falls on the surface of the duck embryo, promoting the absorption of the pickling material by the duck embryo, thereby avoiding the simple outflow and dripping of the pickling material in the holding groove 51, the pickling material cannot contact the duck embryo, and affecting the pickling effect of the duck embryo.

[0049] As an embodiment of the present application, 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 side of the elastic sleeve 5 on which the holding groove 51 is located protruding from the stirring blade 3 is greater than the height of the other side of the elastic sleeve 5 protruding from the stirring blade 3;

[0050] The surface of the elastic sleeve 5 and the extrusion layer 4 is provided with uniformly distributed protrusions;

[0051] 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 prolonging the time of extrusion and rubbing of the duck embryo, fully turning over the duck embryo, improving the rolling and rubbing effect of the duck embryo, and further improving the pickling effect of the duck embryo;

[0052] Meanwhile, by arranging the protrusions, when the duck embryo is extruded and rubbed, the friction received by the duck embryo is relatively large, avoiding the slipping of the extrusion layer 4 or the elastic sleeve 5 on the surface of the duck embryo when the duck embryo is extruded, rubbed and turned over, affecting the extrusion and rubbing of the duck embryo or affecting the duck embryo falling downward through the gap between the extrusion layer 4 and the stirring blade 3;

[0053] Meanwhile, since the height of the elastic sleeve 5 protruding upwards is relatively large, that is, H1 is greater than H2, when the stirring blade 3 rotates, the elastic sleeve 5 and the stirring blade 3 have a relatively large area upwards, and then the holding groove 51 can wrap more pickling materials to move upwards, so as to smear the duck embryo when being extruded, so that the duck embryo and the pickling materials are in contact more fully, and the pickling effect of the duck embryo is improved.

[0054] As an embodiment of the present application, the outer shaft 21 is provided with a connecting frame 31, and the stirring blade 3 is installed on the connecting frame 31.

[0055] The outer shaft 21 is provided with a rotating groove 211, and the connecting frame 31 is provided with a sliding block 311, and the sliding block 311 is slidingly installed in the rotating groove 211.

[0056] Since the stirring blade 3 is installed on the part of the outer shaft 21 located in the roller 2 through the connecting frame 31, and the sliding block 311 on the connecting frame 31 is installed in the rotating groove 211, under the action of inertia, when the duck embryo is pickled, the connecting frame 31 will rotate relative to the outer shaft 21, until the sliding block 311 moves to one end of the rotating groove 211, and then the connecting frame 31 and the stirring blade 3 will be clamped, so that the roller 2 and the stirring blade 3 rotate synchronously, and the duck embryo in the roller 2 is stirred, so as to promote the pickling of the duck embryo.

[0057] Meanwhile, when the duck embryo is pickled and the pickling equipment is cleaned, under the control of the controller, the roller 2 reciprocates forward and backward, at this time, due to the influence of the inertia of the stirring blade 3, the stirring blade 3 will rotate relative to the roller 2, avoiding the stirring blade 3 being fixedly installed in the roller 2, so that the cleaning dead angle appears in the roller 2, the residual oil and other impurities are not easy to clean, and the subsequent normal use of the pickling equipment is affected.

[0058] As an embodiment of the present application, the angle of rotation of the connecting frame 31 in the rotating groove 211 is at least 180 degrees.

[0059] Since the rotating angle of the rotating groove 211 is at least 180 degrees, when the roller 2 reciprocates forward and backward, the stirring blade 3 can contact the inner wall in the roller 2 within 360 degrees under the action of inertia, so that when the pickling equipment is cleaned, the stirring blade 3 can be fully scraped and cleaned on the inner wall of the roller 2, and the cleaning dead angle in the roller 2 is fully avoided, so that the cleaning effect of the pickling equipment is improved, the residual oil and other impurities in the roller 2 are avoided, and the subsequent normal use of the pickling equipment is affected.

[0060] As an embodiment of the present application, the inner shaft 22 is provided with a communication cavity, the inner shaft 22 is provided with a water outlet hole 221, the water outlet hole 221 and the communication cavity are in communication with each other, the water outlet hole 221 is located between adjacent extrusion layers 4, and the communication cavity is connected with a water pump outside.

[0061] When the pickling equipment is cleaned, clean water is pumped into the communication cavity by an external water pump, and then sprayed into the drum 2 from the water outlet hole 221, cooperating with the forward and reverse reciprocating rotation of the drum 2, to fully clean the inner wall of the drum 2, improving the cleaning effect of the drum 2. At the same time, since the water outlet hole 221 is located between the adjacent two extrusion layers 4, when the drum 2 is opened and the extrusion layer 4 does not expand, the sprayed water mist can clean the side surface between the adjacent extrusion layers 4, further avoiding the residual oil in the side surface between the extrusion layers 4, affecting the cleaning effect of the pickling equipment.

[0062] The specific working process is as follows:

[0063] When working, after the duck embryo and the pickling material are sent into the drum 2, the vacuum mechanism and the cooling mechanism are controlled by the controller to vacuum 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 motor is controlled to rotate by the controller, and then the drum 2 is driven to rotate by the transmission mechanism, so that the duck embryos collide and rub with each other. At the same time, after the duck embryos are pickled, the vacuum mechanism and the cooling mechanism are closed by the controller, and then the drum 2 is opened. The motor is controlled to reverse by the controller, and then the drum 2 is reversed to pour out the pickled duck embryos;

[0064] At the same time, when the drum 2 is vacuumized, the pressure in the drum 2 will gradually decrease, so that the pressure in the cavity of the extrusion layer 4 is relatively higher than the pressure in the drum 2, so that the extrusion layer 4 expands. When the duck embryo is driven by the stirring blade 3 and falls down after passing 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, and at this time the duck embryo will be squeezed and rubbed by the extrusion layer 4;

[0065] 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 squeezes and rubs the duck embryo, the force acting on the duck embryo is elastic force;

[0066] At the same time, since the rotation directions of the drum 2 and the inner shaft 22 are opposite, it promotes the turning of the duck embryo when it falls after being driven by the stirring blade 3, so that the duck embryo can be fully turned and rolled in the drum 2;

[0067] At the same time, when the extrusion layer 4 is not vacuumized 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 occupied is relatively small, which is convenient for the staff to feed the pickling equipment. At the same time, after the pickling is completed and the vacuum in the drum 2 is released, the extrusion layer 4 also returns to its original state, and the gap between the extrusion layer 4 and the stirring blade 3 is relatively larger, which is convenient for the duck embryo to be discharged;

[0068] Since the extrusion layers 4 are provided in multiple groups and can slide along the length direction of the inner shaft 22 under the action of the sliding ring 41, the accumulated duck embryos will push the adjacent extrusion layers 4 to both sides, facilitating the accumulated duck embryos to pass through the gap between the extrusion layers 4 and the stirring blade 3;

[0069] Meanwhile, when the duck embryos do not push the adjacent extrusion layers 4 to both sides, the extrusion layers 4 will move close to each other under the action of the magnetic blocks on the sliding ring 41, and return to the original state;

[0070] By installing the elastic sleeve 5 on the stirring blade 3, the duck embryos will contact the elastic sleeve 5 and the extrusion layers 4 when falling downward;

[0071] Meanwhile, by providing the containing groove 51, when the stirring blade 3 drives the duck embryos to move upward, a part of the marinade located at the bottom of the drum 2 will also be lifted upward, so that when the duck embryos fall downward and are extruded and rubbed by the extrusion layers 4, the marinade can flow onto the duck embryos in time;

[0072] Meanwhile, when the duck embryos are extruded, the elastic sleeve 5 and the containing groove 51 will also be extruded, so that the marinade in the containing groove 51 is extruded out. After the marinade is extruded and flies out in the direction of the extrusion layers 4, the marinade will be evenly distributed and fall onto the surface of the duck embryos;

[0073] Since the thickness of the elastic sleeve 5 is relatively large, the contact area between the duck embryos and the elastic sleeve 5 and the contact area between the duck embryos and the extrusion layers 4 are increased, thereby prolonging the time when the duck embryos are extruded and rubbed and the duck embryos are fully turned over;

[0074] Meanwhile, by providing the protrusions, when the duck embryos are extruded and rubbed, the friction force received by the duck embryos is relatively large, avoiding the extrusion layers 4 or the elastic sleeve 5 from slipping on the surface of the duck embryos when the duck embryos are extruded, rubbed and turned over;

[0075] Meanwhile, since the height of the protrusions on the elastic sleeve 5 is relatively large, i.e. H1 is greater than H2, when the stirring blade 3 rotates, there will be a relatively large area between the elastic sleeve 5 and the upper part of the stirring blade 3, thereby cooperating with the containing groove 51 to carry more marinade upward to smear the duck embryos that are extruded;

[0076] Since the stirring blade 3 is installed on the part of the outer shaft 21 located in the drum 2 through the connecting frame 31, and the sliding block 311 on the connecting frame 31 is installed in the rotating groove 211, under the action of inertia, when the duck embryos are marinated, the connecting frame 31 will rotate relative to the outer shaft 21 until the sliding block 311 moves to one end of the rotating groove 211. After that, the connecting frame 31 and the stirring blade 3 will be clamped, so that the drum 2 and the stirring blade 3 rotate synchronously to agitate the duck embryos in the drum 2;

[0077] At the same time, when the duck embryo is marinated and the marinating equipment is cleaned, the drum 2 is rotated forward and reverse 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 fixed in the drum 2, resulting in a cleaning dead corner in the drum 2;

[0078] 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 fully scrape and clean the inner wall of the drum 2, and the formation of cleaning dead corners in the drum 2 is fully avoided.

[0079] When cleaning the pickling equipment, clean water is pumped into the communicating cavity by an external water pump, and then sprayed into the drum 2 from the water outlet 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 221 is located between two adjacent extrusion layers 4, when the drum 2 is opened and the extrusion layers 4 have not expanded, the sprayed water mist will clean the sides between the adjacent extrusion layers 4.

[0080] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-temperature circulation marinating device for preparing roast duck, comprising a frame (1), a drum (2) mounted on the frame (1), a motor mounted in the frame (1), the motor driving the drum (2) to rotate via a transmission mechanism, a vacuum mechanism and a cooling mechanism mounted in the frame (1), the vacuum mechanism evacuating the drum (2), and the cooling mechanism cooling the drum (2); Its characteristics are: 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), 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 a gap for the duck embryo to pass through exists between the extrusion layer (4) and the stirring blade (3); when the vacuum mechanism and the cooling mechanism evacuate and cool the inside of the drum (2), the pressure in the drum (2) will gradually decrease, causing the pressure in the cavity of the extrusion layer (4) to increase relative to the pressure inside the drum (2), thereby causing the extrusion layer (4) to expand; when the drum (2) is not evacuated, the pressure in the cavity of the extrusion layer (4) is consistent with the pressure inside the drum (2), and the extrusion layer (4) will not expand; Multiple groups 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.

2. 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 receiving groove (51) is provided on the surface of the elastic sleeve (5).

3. The low-temperature circulation marinating equipment for preparing roast duck according to claim 2, characterized in that: The opening of the containing groove (51) is tilted and points in the direction of the extrusion layer (4).

4. The low-temperature circulation marinating equipment for preparing roast duck according to claim 2, 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 provided on the surfaces of the elastic sleeve (5) and the extrusion layer (4).

5. 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); A rotation groove (211) is provided on the outer shaft (21), a slider (311) is installed on the connecting frame (31), and the slider (311) is slidably installed in the rotation groove (211).

6. The low-temperature circulation marinating equipment for preparing roast duck according to claim 5, characterized in that: The connecting frame (31) rotates in the rotation groove (211) at an angle of at least 180 degrees.

7. The low-temperature circulation marinating equipment for preparing roast duck according to claim 1, characterized in that: A communication 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 communication cavity are communicated with each other, the water outlet hole (221) is located between adjacent extrusion layers (4), and the communication cavity is connected to an external water pump.

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