Double-screw filling machine

Abstract

The double-screw filling machine comprises a double-screw conveying device and a refrigerating system, the double-screw conveying device comprises a first screw, a second screw and a screw barrel, the first screw and the second screw are arranged in parallel and rotationally installed in the screw barrel, the screw barrel is provided with a first end and a second end, the screw barrel is provided with a feeding port and a discharging port, and the first end and the second end of the screw barrel are communicated with each other. The discharging port is located at the first end, and the feeding port is formed in the cylinder wall of the screw cylinder; the refrigerating system comprises an evaporator, and the evaporator is arranged on the cylinder wall of the screw cylinder in a surrounding mode. According to the invention, the discharging temperature can be controlled within the temperature range meeting the forming requirement, the integrity of the shape of the material is ensured to the maximum extent, the produced product has obvious fibrous meat feeling characteristics, and meanwhile, the product is not easy to deform in the subsequent conveying and processing process, so that the commercial value of the meat product is improved, and the market prospect is wide. The device is particularly suitable for continuous automatic quantitative filling of meat loaf materials.

Description

Technical Field

[0001] The invention relates to the technical field of filling equipment, and in particular to a twin-screw filling machine for filling meat product materials. Background Art

[0002] The meat fibers of the meat chunks are clearly visible and have a higher commercial value than minced meat.

[0003] Chinese utility model patent CN209795891U discloses a meat material filling device, which adopts a twin-screw structure. When the screw rotates, the material is discharged from the end. During the conveying and filling period, the material fluctuation pulse is small and there is no extrusion, which reduces the damage to the physical structure of the meat material. Moreover, through vacuum suction, the material can be made relatively uniform in structure and the voids are reduced during the filling process.

[0004] However, the product produced by the above-mentioned filling device has an irregular shape and the fibrous meat texture is not obvious. Moreover, the product is easily deformed during the subsequent transportation and processing (such as battering and coating), thereby reducing the commercial value of the meat product. Summary of the invention

[0005] In view of this, the technical problem to be solved by the present invention is to provide a twin-screw filling machine that can control the discharge temperature within a temperature range that meets the molding requirements, maximize the integrity of the material shape, and make the produced products have obvious fibrous meaty characteristics, thereby improving the commercial value of meat products, and is particularly suitable for continuous automatic quantitative filling of meat block materials.

[0006] In order to solve the first technical problem mentioned above, the technical solution adopted by the present invention is: a twin-screw filling machine, comprising: a twin-screw conveying device and a refrigeration system, the twin-screw conveying device comprises a first screw, a second screw and a screw barrel, the first screw and the second screw are arranged in parallel and rotatably installed in the screw barrel, the screw barrel has a first end and a second end, the screw barrel is provided with a feed port and a discharge port, the discharge port is located at the first end, the feed port is arranged on the barrel wall of the screw barrel, and the power input ends of the first screw and the second screw extend from the second end; the refrigeration system is used to keep the discharge temperature constant, the refrigeration system comprises an evaporator, and the evaporator is arranged around the barrel wall of the screw barrel.

[0007] Among them, the evaporator includes a cooling jacket sleeved on the outer periphery of the screw barrel, a cooling chamber is formed between the cooling jacket and the screw barrel, the cooling chamber is provided with a liquid inlet and a liquid outlet, a plurality of partitions are arranged in the cooling chamber from the liquid inlet to the liquid outlet, the partitions are provided with liquid holes, and the liquid holes on adjacent partitions are arranged in a staggered manner.

[0008] Wherein, the evaporator is a fin-type evaporator.

[0009] The spiral structures of the first screw and the second screw are interlocked and have opposite rotation directions.

[0010] Among them, the barrel wall of the screw barrel is provided with a vacuum suction port, the vacuum suction port is connected to the inner cavity of the screw barrel, the vacuum suction port is closer to the second end than the feed port, and the vacuum suction port is connected to a negative pressure system, and the negative pressure system includes a vacuum pump.

[0011] Wherein, the feed inlet is equipped with a forced feeding device.

[0012] Wherein, the first screw and the second screw are respectively connected to the two power output shafts of the transfer case in driving connection.

[0013] After adopting the above technical solution, the beneficial effects of the present invention are:

[0014] The twin-screw filling machine disclosed in the present invention is an organic combination of a twin-screw conveying device and a refrigeration system. The twin-screw conveying device includes a first screw, a second screw and a screw barrel. The material is fed from the feed port to the discharge port. During the conveying process, the twin screws rotate in opposite directions, which can reduce the shearing of the meat block and avoid the damage of the meat block. The evaporator of the refrigeration system is arranged around the barrel wall of the screw barrel, so that the refrigerant and the meat block material can simultaneously exchange heat during the conveying process. According to the set temperature and the actual temperature of the material measured by the temperature sensor, the operation of the refrigeration system is adjusted to control the discharge temperature of the meat block within a temperature range that meets the molding requirements (for example, -2 to -4°), thereby maximally ensuring the integrity of the material shape and making the produced product have obvious fibrous meat characteristics. At the same time, in the subsequent conveying and processing (such as sizing and coating), the product is not easy to deform, thereby improving the commercial value of the meat product, and is particularly suitable for continuous automatic quantitative filling of meat block materials.

[0015] In the present invention, the evaporator of the refrigeration system includes a cooling jacket sleeved on the outer periphery of the screw barrel, a cooling chamber is formed between the cooling jacket and the screw barrel, the cooling chamber is provided with a liquid inlet and a liquid outlet, a plurality of partitions are provided in the cooling chamber from the liquid inlet to the liquid outlet, the partitions are provided with liquid holes, and the liquid holes on adjacent partitions are arranged in a staggered manner. The above structure can prevent the refrigerant from flowing too fast in the cooling chamber, prolong the residence time, and thus enhance the refrigeration effect.

[0016] In the present invention, a vacuum suction port and a feed port are arranged on the barrel wall of the screw barrel, the vacuum suction port is connected to a negative pressure system, and a forced feeding device is installed on the feed port. Bubbles carried by the material during forced feeding are sucked away by the vacuum pump, the density of the material is improved, and the filling error is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a front view of an embodiment of a filling and molding machine of the present invention;

[0018] Figure 2 yes Figure 1 A longitudinal sectional view of a twin screw conveying device in the illustrated embodiment;

[0019] Figure 3 yes Figure 2 A top view of

[0020] Figure 4 yes Figure 2 Enlarged left view;

[0021] Figure 5 yes Figure 1 The structural schematic diagram of the refrigeration system in the embodiment shown is shown;

[0022] Figure 6 yes Figure 5 Sectional view at AA in the middle;

[0023] Figure 7 yes Figure 5 Sectional view at the middle BB;

[0024] Figure 8 yes Figure 5 Sectional view at CC;

[0025] Fig. 9 yes Figure 5 Sectional view at DD in the middle;

[0026] In the figure: 1. frame; 2. motor; 3. transfer case; 4. negative pressure system; 41. vacuum pump; 5. forced feeding device; 6. twin-screw conveying device; 61. screw barrel; 62A. first screw; 62B. second screw; 63. vacuum suction port; 64. feed port; 65. coupling; 66. discharge port; 67. forming die; 7. refrigeration system; 71. cooling jacket; 72. partition; 73. liquid inlet; 74. liquid outlet; 75. cooling chamber; 76. liquid through hole; 8. electronic control system. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] like Figure 1As shown, a twin-screw filling machine is suitable for filling meat products, especially meat blocks. A twin-screw conveying device 6 is installed on the frame 1, and the motor 2 is connected to the transfer box 3. The transfer box 3 outputs power to drive the screws of the twin-screw conveying device 6. A forced feeding device 5 is installed at the feed inlet of the twin-screw conveying device 6, and a negative pressure system 4 is installed at the vacuum suction port of the twin-screw conveying device 6. The screw barrel of the twin-screw conveying device 6 is surrounded by an evaporator of a refrigeration system 7.

[0029] like Figure 2 , Figure 3 and Figure 4 As shown, the twin screw conveying device 6 includes a first screw 62A, a second screw 62B and a screw barrel 61. The first screw 62A and the second screw 62A are arranged in parallel and rotatably installed in the screw barrel 61. The first screw 62A and the second screw 62B have spiral structures that are interlocked with each other and have opposite rotation directions. During operation, the first screw 62A and the second screw 62B rotate in opposite directions to mix and convey the materials, which can reduce shearing of the meat pieces and avoid damage to the meat pieces.

[0030] The screw barrel 61 has a first end and a second end. The screw barrel 61 is provided with a feed port 64 and a discharge port 66. The discharge port 66 is provided at the first end. The screw barrel 61 discharges materials through the end of the discharge port 66. The discharge port 66 can be connected to a molding die 67 or can be connected to other equipment through a pipeline. The feed port 64 is provided on the barrel wall of the screw barrel 61. The power input ends of the first screw 62A and the second screw 62B extend from the second end respectively and are connected to the two power output shafts of the transfer case 3 through a coupling 65.

[0031] The wall of the screw barrel 61 is provided with a vacuum suction port 63, which is connected to the inner cavity of the screw barrel 61 and is closer to the second end than the feed port 64. The negative pressure system 4 is connected to the vacuum suction port 63, and the negative pressure system 4 includes a vacuum pump 41. The bubbles carried by the material during forced feeding are sucked away by the vacuum pump 41, the density of the material is improved, and the filling error is reduced.

[0032] like Figures 5 to 9As shown, the refrigeration system 7 is an important component of the twin-screw filling machine of the present invention, which is used to keep the discharge temperature constant. The refrigeration system 7 includes a compressor, a condenser, an expansion valve and an evaporator, etc. The refrigeration principle is: the compressor compresses the steam with lower pressure into steam with higher pressure, so that the volume of the steam decreases and the pressure increases. The compressor inhales the working fluid steam with lower pressure coming out of the evaporator, increases the pressure and then sends it to the condenser, condenses it into a liquid with higher pressure in the condenser, and after throttling by the throttle valve, becomes a liquid with lower pressure, and then is sent to the evaporator, absorbs heat and evaporates in the evaporator to become steam with lower pressure, and then is sent to the inlet of the compressor, thereby completing the refrigeration cycle. The system operation can be adjusted according to the set temperature and the actual temperature of the material measured by the temperature sensor. Temperature control belongs to the conventional control technology for the automatic operation of the refrigeration system. The type and setting position of the temperature sensor can be selected and set as needed, and will not be repeated here. Figure 5 In the illustrated embodiment, the structure of the evaporator is highlighted, and other parts are generally represented by a refrigeration unit.

[0033] like Figure 5 As shown, the evaporator includes a cooling jacket 71, which is sleeved on the outer periphery of the screw barrel 61 and forms a cooling chamber 75 between the cooling jacket 71 and the screw barrel 61. The cooling chamber 75 is provided with a liquid inlet 73 and a liquid outlet 74. The refrigerant circulation pipeline of the refrigeration unit is connected to the liquid inlet 73 and the liquid outlet 74.

[0034] like Figures 6 to 9 As shown, in order to prevent the refrigerant from flowing too fast in the cooling chamber, prolong the residence time and enhance the refrigeration effect, a plurality of partitions 72 are arranged in the cooling chamber 75 from the liquid inlet 73 to the liquid outlet 74, and the partitions 72 are provided with liquid holes 76. The liquid holes 76 on adjacent partitions 72 are arranged in a staggered manner.

[0035] The concept of the present invention is embodied in the organic combination of the twin-screw conveying device and the refrigeration system. Since the evaporator of the refrigeration system is arranged around the wall of the screw barrel, the refrigerant and the meat block material can exchange heat simultaneously during the conveying process. During operation, the operation of the refrigeration system is adjusted according to the system set temperature and the actual temperature of the material measured by the temperature sensor, and the discharge temperature of the meat block is controlled within the temperature range that meets the molding requirements (for example, -2 to -4°), so as to maximize the integrity of the material shape, so that the produced product has obvious fibrous meat characteristics. At the same time, in the subsequent conveying and processing (such as sizing and coating), the product is not easy to deform, thereby improving the commercial value of the meat product.

[0036] From the perspective of facilitating heat exchange between the refrigerant and the meat material during transportation, the structure of the evaporator is not limited to the above-mentioned embodiment, and other structures that can allow heat exchange between the meat and the refrigerant through the wall of the screw barrel 61 can also be used, such as a fin-type evaporator.

[0037] The twin-screw filling machine disclosed in the present invention has various system units uniformly controlled by an electronic control system 8, is easy to assemble and disassemble, easy to clean, easy to operate, safe and reliable, and is particularly suitable for continuous automatic quantitative filling of meat materials.

[0038] The present invention is not limited to the above embodiments, and all improvements based on the concept, principle, structure and method of the present invention will fall within the protection scope of the present invention.

Claims

1. A twin-screw filling machine, comprising: A twin-screw conveying device, the twin-screw conveying device comprises a first screw, a second screw and a screw barrel, the first screw and the second screw are arranged in parallel and rotatably installed in the screw barrel, the screw barrel has a first end and a second end, the screw barrel is provided with a feed port and a discharge port, the discharge port is located at the first end, the feed port is arranged on the barrel wall of the screw barrel, and the power input ends of the first screw and the second screw extend from the second end; characterized in that, The twin-screw filling machine also includes a refrigeration system for maintaining a constant discharge temperature. The refrigeration system includes an evaporator that is disposed around the barrel wall of the screw barrel.

2. The twin-screw filling machine according to claim 1, characterized in that: The evaporator comprises a cooling jacket sleeved on the outer circumference of the screw barrel, a cooling cavity is formed between the cooling jacket and the screw barrel, and the cooling cavity is provided with a liquid inlet and a liquid outlet.

3. The twin-screw filling machine according to claim 2, characterized in that: A plurality of partitions are arranged in the cooling cavity from the liquid inlet to the liquid outlet. The partitions are provided with liquid holes, and the liquid holes on adjacent partitions are arranged in a staggered manner.

4. The twin-screw filling machine according to claim 1, characterized in that: The evaporator is a finned evaporator.

5. The twin-screw filling machine according to claim 1, characterized in that: The spiral structures of the first screw and the second screw are interlocked with each other and have opposite rotation directions.

6. The twin-screw filling machine according to claim 1, characterized in that: The barrel wall of the screw barrel is provided with a vacuum suction port, the vacuum suction port is communicated with the inner cavity of the screw barrel, and the vacuum suction port is closer to the second end than the feed port.

7. The twin-screw filling machine according to claim 6, characterized in that: The vacuum suction port is connected to a negative pressure system, and the negative pressure system includes a vacuum pump.

8. The twin-screw filling machine according to claim 1, characterized in that: The feed inlet is equipped with a forced feeding device.

9. The twin-screw filling machine according to claim 1, characterized in that: The first screw and the second screw are respectively connected to the two power output shafts of the transfer case.

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