A multi-stage fish paste grinding device

Abstract

This application discloses a multi-stage fish paste grinding device, relating to the technical field of fish paste processing equipment. It includes several grinding devices and several conveying devices. The conveying devices include a drive unit, a rotating shaft, spiral blades, and a conveying pipe. The conveying pipe is inclined and has a conveying channel inside. The rotating shaft is located in the conveying channel and rotatably connected to the conveying pipe. The spiral blades are disposed on the rotating shaft. The drive unit can drive the rotating shaft to rotate, and the rotation of the spiral blades can drive the raw materials to move. Several drainage holes are provided on the spiral blades. A water collection frame is also provided at the inclined lower end of the conveying pipe. The water collection frame has a water collection trough inside, and the water collection trough communicates with the conveying channel. This application can reduce the impact of high moisture content in frozen raw materials on the conveying equipment, while improving the grinding efficiency of the fish paste and the quality of the final fish paste product.

Description

Technical Field

[0001] This application relates to the technical field of fish paste processing equipment, and in particular to a multi-stage fish paste grinding device. Background Technology

[0002] Fish paste, generally speaking, refers to a viscous paste made primarily from fish. It is often used as a binder in the production of pelleted feed and is also a source of protein in feed.

[0003] The operation method of a multi-stage fish paste grinding device is as follows: frozen raw materials (i.e., fish) are put into the grinding equipment for preliminary grinding, and then the frozen raw materials after preliminary grinding are sent to the next grinding equipment for secondary grinding through the transport equipment. This cycle is repeated to grind the frozen raw materials multiple times. The grinding precision of the grinding equipment is gradually improved until the frozen raw materials are ground to the required fineness.

[0004] Existing conveying equipment typically employs a screw conveyor (i.e., an auger), comprising a drive unit, a rotating shaft, helical blades, and a conveying pipe. The drive unit rotates the rotating shaft, causing the helical blades to rotate within the conveying pipe, thereby propelling the pulverized frozen raw material into the pipe. To minimize the space occupied by the multi-stage fish paste grinding device, the feeding direction of the conveying equipment is typically inclined upwards, and the corresponding pulverizing equipment is installed below the discharge port of the conveying equipment and above the inlet of the next conveying equipment.

[0005] However, due to the high moisture content of frozen raw materials, the surface of the spiral blades and the inner wall of the conveying pipe become wet. This reduces the friction between the crushed frozen raw materials and the surface of the spiral blades, as well as the friction between the crushed frozen raw materials and the inner wall of the conveying pipe. Consequently, this affects the efficiency of the conveying equipment in transporting the crushed frozen raw materials and makes it easier for the crushed frozen raw materials to adhere to the surface of the spiral blades and the inner wall of the conveying pipe. At the same time, the moisture remaining inside the conveying equipment can easily breed bacteria when it comes into contact with the crushed frozen raw materials, thereby affecting the quality of other crushed frozen raw materials and ultimately the quality of the final fish paste product. Summary of the Invention

[0006] This application provides a multi-stage fish paste grinding device, which can reduce the impact of high water content in frozen raw materials on transportation equipment, and at the same time improve the grinding efficiency of fish paste and the quality of the final fish paste product.

[0007] This application provides a multi-stage fish paste grinding device, which adopts the following technical solution:

[0008] A multi-stage fish paste grinding device includes several crushing devices and several conveying devices. Each conveying device is connected to two of the crushing devices, and the crushing precision of the crushing devices gradually increases along the conveying direction. Each conveying device includes a drive unit, a rotating shaft, helical blades, and a conveying pipe. The conveying pipe is inclined and has a conveying channel inside. The rotating shaft is located in the conveying channel and rotatably connected to the conveying pipe, with its rotation axis parallel to the conveying direction of the conveying pipe. The helical blades are disposed on the rotating shaft and contact the inner wall of the conveying channel. The drive unit is disposed on the conveying pipe and can drive the rotating shaft to rotate. The helical blades, rotating with the rotating shaft, can drive the raw material to move inclined upwards along the conveying channel.

[0009] The spiral blades are provided with several drainage holes for water to drain out. The lower inclined end of the transport pipe is also provided with a water collection frame. The water collection frame is detachably connected to the transport pipe. The interior of the water collection frame has a water collection trough, and the water collection trough is connected to the lower inclined end of the transport channel.

[0010] By adopting the above technical solution, during the transportation of the crushed raw materials, the drain holes can drain the water, achieving preliminary solid-liquid separation. The water flows into the water collection frame along the transportation channel for collection, making it convenient for users to remove the water from the inside of the transportation equipment after disassembling the water collection frame. This reduces the probability that bacteria will grow due to prolonged water residue inside the transportation equipment, affecting the quality of the final fish paste product. At the same time, when the raw materials adhere to the surface of the spiral blades due to water, the drain holes can act as ventilation holes, facilitating the separation of the raw materials from their original adhered positions on the spiral blades during transportation. This reduces the probability that the raw materials adhering to the spiral blade surface will affect the raw material transportation efficiency, thereby improving the grinding efficiency of the fish paste.

[0011] Optionally, the outer edge of the spiral blade is provided with a plurality of relief grooves, the relief grooves passing through the spiral blade in a direction perpendicular to the rotation axis of the rotation shaft, and the relief grooves are capable of allowing water to pass through.

[0012] By adopting the above technical solution, the effect of solid-liquid separation of raw materials in the transportation channel can be further improved, so that water can flow into the water collection frame along the transportation channel as much as possible.

[0013] Optionally, the surface of the helical blade has a first cutting edge on both sides of the relief groove for cutting the raw material.

[0014] By adopting the above technical solution, the first cutting edge can cut the raw materials in the transport channel during the rotation of the spiral blade along the rotating shaft, thereby improving the efficiency and effect of raw material crushing, and thus improving the grinding efficiency of fish paste.

[0015] Optionally, the transport pipe has a plurality of first protrusions at the bottom of the transport channel, the first protrusions being adapted to the relief grooves; when the spiral blades rotate with the rotating shaft, the first protrusions can pass through the corresponding relief grooves.

[0016] By adopting the above technical solution, the first protrusions can improve the positional stability of the raw material at the bottom of the transport channel, thereby reducing the probability of the raw material sliding down the transport channel; at the same time, the first protrusions can play a positioning role for the raw material during the cutting process of the first blade, thereby improving the cutting effect and reliability of the first blade.

[0017] Optionally, the first protrusion has a second blade at one end opposite to the rotation direction of the rotation axis, and the first protrusion has a third blade at the end near the inclined lower end of the transport tube.

[0018] By adopting the above technical solution, when the raw material in contact with the first protrusion is subjected to the force of the rotating spiral blade, both the second and third blades can cut the raw material, thereby further improving the efficiency and effect of raw material crushing, and further improving the grinding efficiency of fish paste.

[0019] Optionally, the transport pipe is further provided with a water collection channel below the transport channel, and the transport pipe is also provided with a plurality of water collection holes for connecting the transport channel and the water collection channel, and the water collection channel is connected to the water collection tank.

[0020] By adopting the above technical solution, most of the water formed after solid-liquid separation can flow into the water collection channel through the water collection hole and finally be collected in the water collection frame, thereby reducing the probability of water aggravating the wetting of the inner wall of the bottom of the transport pipeline during the process of water flowing down the transport channel.

[0021] Optionally, it also includes several elastic elements, the first protrusion is movably connected to the transport tube, the two ends of the elastic elements are respectively connected to the first protrusion and the transport tube, and the elastic elements drive the first protrusion to remain exposed in the transport channel;

[0022] The first protrusion is located in the water collection channel, and the first protrusion has several plugs at one end of the water collection channel. The plugs are adapted to the water collection hole, and the elastic element drives the plugs to seal the water collection hole.

[0023] By adopting the above technical solution, the raw material in contact with the first protrusion can be driven to overcome the force of the elastic element after being subjected to the rotation of the spiral blade. This allows the raw material to be both cut and squeezed during the process, improving the solid-liquid separation effect. The squeezed-out water can flow into the water collection channel through the water collection hole in a timely manner, while reducing the probability of the raw material clogging the water collection hole.

[0024] Optionally, the transport pipe also has a plurality of second protrusions on the inner wall of the transport channel, the second protrusions being adapted to the relief grooves; when the spiral blades rotate with the rotating shaft, the second protrusions can pass through the corresponding relief grooves, and both ends of the second protrusions along the rotation direction of the rotating shaft have fourth cutting edges.

[0025] By adopting the above technical solution, when raw materials adhere to the inner walls on both sides of the transport pipeline, the raw materials will adhere to the position near the second protrusion, making it easier for the raw materials to adhere to the area around the second protrusion. This makes it easier for the spiral blades to scrape off the raw materials adhering to the area around the second protrusion during rotation.

[0026] Optionally, the surface of the spiral blade may also have a plurality of cutting elements, and the end of the cutting element that contacts the raw material along the rotation direction of the rotating shaft has a fifth cutting edge.

[0027] By adopting the above technical solution, when the cutting part comes into contact with the raw material as the spiral blade rotates, the fifth blade can cut the raw material, thereby further improving the efficiency and effect of raw material crushing, and further improving the grinding efficiency of fish paste.

[0028] Optionally, the cutting element has a sixth cutting edge at one end near the rotating shaft.

[0029] By adopting the above technical solution, when the fifth blade fails to completely cut the raw material during the cutting process, the raw material will follow the fifth blade and rotate with the spiral blade; during the rotation of the raw material, it will come into contact with the sixth blade under the action of centrifugal force and be cut by the sixth blade, thereby improving the cutting effect of the cutting part on the raw material.

[0030] In summary, this application includes at least one of the following beneficial effects:

[0031] 1. It can separate the solid and liquid components of raw materials in the transportation channel and collect the water at a location far away from the raw materials. This can reduce the impact of high water content of frozen raw materials on the transportation efficiency of the transportation equipment, improve the grinding efficiency of fish paste, reduce the probability of bacterial growth in the transportation channel, and improve the quality of the final fish paste product.

[0032] 2. During the transportation of raw materials in the transport channel, they can be cut by the spiral blades, thereby improving the effect and efficiency of raw material crushing, and further improving the grinding efficiency of fish paste.

[0033] 3. It can reduce the probability of raw materials adhering to the surface of the spiral blades and the inner wall of the transport channel, thereby further improving the transport efficiency and effectiveness of raw materials, while reducing the waste of raw materials caused by adhesion.

[0034] 4. The rotating spiral blades can cut and compress the raw materials during the cutting process, improving the solid-liquid separation effect. This can further reduce the impact of high water content in frozen raw materials on the transportation efficiency of transport equipment and the quality of the final fish paste product. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of a multi-stage fish paste grinding device according to an embodiment of this application;

[0036] Figure 2 This is a partial cross-sectional view of a multi-stage fish paste grinding device according to an embodiment of this application (the internal structure of the transport pipe is simplified).

[0037] Figure 3 This is a schematic diagram of the internal structure of the transport pipe in an embodiment of this application;

[0038] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0039] Figure 5 yes Figure 3 Enlarged view of point B in the middle;

[0040] Figure 6 This is a cross-sectional view of the transport pipe in the radial direction in an embodiment of this application.

[0041] Explanation of reference numerals in the attached drawings: 1. Crushing equipment; 2. Conveying equipment; 3. Collection frame; 4. Conveying pipe; 41. Conveying channel; 42. Feed hopper; 43. Discharge hopper; 44. Water collection hole; 45. Water collection channel; 46. First protrusion; 461. Plug; 47. Second protrusion; 5. Rotating shaft; 6. Spiral blade; 61. Drain hole; 62. Relief groove; 63. Cutting component; 7. Driving component; 8. Water collection frame; 81. Water collection trough; 9. Elastic component; 101. First cutting edge; 102. Second cutting edge; 103. Third cutting edge; 104. Fourth cutting edge; 105. Fifth cutting edge; 106. Sixth cutting edge. Detailed Implementation

[0042] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0043] This application discloses a multi-stage fish paste grinding device for grinding frozen raw materials (i.e., fish) multiple times with gradually increasing precision, so that the final frozen raw materials are ground to the required fineness.

[0044] Reference Figure 1 The multi-stage fish paste grinding device includes multiple crushing devices 1 and multiple conveying devices 2, all spaced apart along the same straight line. Each conveying device 2 is connected to two adjacent crushing devices 1 at each end, receiving the raw material after crushing by one crushing device 1 and transporting it to the next crushing device 1 for further crushing. The multiple conveying devices 2 have the same transport direction, while the crushing precision of the multiple crushing devices 1 varies, gradually increasing along the transport direction of the raw material. In this embodiment, for ease of description and accompanying drawings, it is preferred that the multi-stage fish paste grinding device includes two crushing devices 1 and two conveying devices 2.

[0045] In this embodiment, the preferred pulverizing device 1 is a pulverizer. Since pulverizing frozen raw materials using a pulverizer is a common existing technology in the art, no further details about the pulverizer are provided here, nor is the specific type of pulverizer further limited. The pulverizer is only briefly shown in the accompanying drawings. In other embodiments, different types of pulverizers may be used in different pulverizing devices 1.

[0046] Furthermore, the multi-stage fish paste grinding device also includes a collection frame 3 for collecting the final crushed raw materials. The collection frame 3 is placed at the discharge port of the conveying equipment 2 located at the rear end of the processing line, and the final crushed raw materials can be discharged into the collection frame 3 for collection.

[0047] After the user puts the frozen raw materials into the crushing equipment 1 located at the front end of the processing line, the crushing equipment 1 will crush the raw materials for the first time. The raw materials after the first crushing will then enter the conveying equipment 2 located near the front end of the processing line. The conveying equipment 2 will send the raw materials after the first crushing to the crushing equipment 1 located near the rear end of the processing line. The crushing equipment 1 will then crush the raw materials after the first crushing for the second time. The raw materials after the second crushing will then enter the conveying equipment 2 located at the rear end of the processing line. The conveying equipment 2 will send the raw materials after the second crushing out and collect them in the collection frame 3.

[0048] Reference Figure 2 and Figure 3 The transport equipment 2 includes a transport pipe 4, a rotating shaft 5, a spiral blade 6, and a drive component 7.

[0049] The transport pipe 4 has a cylindrical structure. Inside the transport pipe 4 is a transport channel 41 for guiding the movement of raw materials. The transport channel 41 is cylindrical in shape, and the axis of the transport channel 41 coincides with the axis of the transport pipe 4.

[0050] The transport pipe 4 is installed at an angle, with the end of the transport pipe 4 closest to the front end of the processing line being the lower angle. In this embodiment, it is preferable that the transport pipe 4 is installed at an angle through a support structure fixed to the ground. Since the above-mentioned support structure is a common existing technology, it will not be described in detail here.

[0051] The conveying pipe 4 has a feed hopper 42 and a discharge hopper 43 at its two ends along the axial direction. The feed hopper 42 is located at the lower inclined end of the conveying pipe 4, and the discharge hopper 43 is located at the upper inclined end of the conveying pipe 4. The interiors of both the feed hopper 42 and the discharge hopper 43 are connected to the conveying channel 41. In this embodiment, the crushing device 1, preferably located near the rear end of the processing line, is situated between the adjacent discharge hopper 43 and feed hopper 42 on the two conveying pipes 4.

[0052] In this embodiment, the preferred method is to keep the transport channel 41 sealed except for the connection with the outside world through the feed hopper 42 and the discharge hopper 43; in other embodiments, the top of the transport pipe 4 may be hollowed out so that the user can observe the transport of the raw materials in the transport channel 41.

[0053] The rotating shaft 5 has a cylindrical rod-like structure. It is installed in the transport channel 41 and is rotatably connected to the transport pipe 4 at both ends. The axis of rotation of the rotating shaft 5 coincides with its own axis and the axis of the transport pipe 4, and one end of the rotating shaft 5 extends out of the inclined upper end of the transport pipe 4 along the axial direction.

[0054] The spiral blade 6 is located in the transport space and is fixedly mounted on the rotating shaft 5. The spiral blade 6 is adapted to the transport pipe 4, that is, the outer edge of the spiral blade 6 can fit against the inner wall of the transport pipe 4.

[0055] The drive component 7 is fixedly installed on the outside of the transport pipe 4 and located at the inclined upper end of the transport pipe 4. One end of the rotating shaft 5, which extends out of the transport pipe 4, is fixedly connected to the drive component 7. The drive component 7 drives the rotating shaft 5 to rotate relative to the transport pipe 4, and the spiral blades 6, as they rotate with the rotating shaft 5, can drive the raw materials in the transport channel 41 to move inclined upward along the transport channel 41. In this embodiment, the drive component 7 is preferably a stepper motor; and the working principle of the transport device 2 is preferably the same as that of the screw conveyor, so its working principle will not be described in detail here.

[0056] The spiral blade 6 has several drainage holes 61, the size of which is smaller than the size of the crushed raw material. As the spiral blade 6 drives the raw material to move upward along the conveying channel 41, the excess water that has separated from the raw material will flow downward along the conveying channel 41 through the drainage holes 61, thereby achieving preliminary solid-liquid separation.

[0057] To facilitate the collection of moisture extracted from the raw materials and reduce the probability of bacteria growth due to prolonged moisture retention in the transport channel 41, a water collection frame 8 can be detachably connected to the bottom of the inclined lower end of the transport pipe 4. After the water collection frame 8 is connected to the transport pipe 4, the water collection trough 81 inside the water collection frame 8 communicates with the inclined lower end of the transport channel 41. In this embodiment, it is preferable that the water collection frame 8 is detachably connected to the transport pipe 4 by a horizontal sliding snap-fit ​​mechanism.

[0058] Reference Figure 3 and Figure 4 To further facilitate the collection of water precipitated from the raw material into the water collection frame 8 along the inclined downward flow of the transport channel 41, several clearance grooves 62 are provided along the outer edge of the spiral blade 6. These clearance grooves 62 are evenly distributed along the spiral trajectory of the spiral blade 6. Water precipitated from the raw material and located at the bottom of the transport channel 41 can flow inclined downward along the transport channel 41 through the clearance grooves 62 near the bottom of the transport channel 41, thereby improving the effect of preliminary solid-liquid separation.

[0059] Furthermore, preferably, the relief grooves 62 extend through the spiral blades 6 along the rotation direction of the rotating shaft 5, and preferably, the surface of the spiral blades 6 has first cutting edges 101 on both sides of the relief grooves 62. The first cutting edges 101 are located on the end face of the spiral blades 6 that contacts the raw material and is used to drive the raw material to move obliquely upward along the transport channel 41. During the rotation of the spiral blades 6, the first cutting edges 101 can cut the raw material in contact with the spiral blades 6 in the transport channel 41, and the cutting direction of the first cutting edges 101 on the raw material is the same as the rotation direction of the rotating shaft 5.

[0060] Reference Figure 5 and Figure 6 Preferably, a number of first protrusions 46 are installed at the bottom of the transport pipe 4 and the transport channel 41. The number of first protrusions 46 are evenly distributed at both the axial direction of the transport pipe 4 and the rotation direction of the rotating shaft 5 at the bottom of the transport channel 41. The first protrusions 46 are adapted to the relief grooves 62, that is, during the rotation of the spiral blade 6, the number of first protrusions 46 can pass through the corresponding relief grooves 62.

[0061] The first protrusion 46 has a second blade 102 at one end opposite to the rotation direction of the rotating shaft 5. When the spiral blade 6 rotates and drives the raw material in the transport channel 41 to move along the rotation direction of the rotating shaft 5 and come into contact with the first protrusion 46, the raw material will come into contact with the second blade 102 on the first protrusion 46, and at this time the force of the spiral blade 6 on the raw material can drive the raw material to be cut by the second blade 102.

[0062] The first protrusion 46 has a third blade 103 at one end opposite to the direction of movement of the raw material in the transport channel 41. When the spiral blade 6 rotates and drives the raw material to move upward along the transport channel 41 and come into contact with the first protrusion 46, the raw material will come into contact with the third blade 103 on the first protrusion 46. At this time, the force exerted by the spiral blade 6 on the raw material can drive the raw material to be cut by the third blade 103.

[0063] Furthermore, the first protrusion 46 is movably connected to the transport pipe 4, and the direction of movement of the first protrusion 46 is the same as the direction of the perpendicular line connecting it to the axis of the rotation shaft 5. A plurality of elastic elements 9 are fixedly connected between the first protrusion 46 and the transport pipe 4. The elastic elements 9 can drive the first protrusion 46 to move towards the transport channel 41 to its limit position and maintain it thereafter. In this embodiment, the elastic element 9 is preferably a tension spring.

[0064] The first protrusion 46 is restricted in its movement relative to the transport pipe 4. When the first protrusion 46 moves to its limit position in the direction closer to the transport channel 41, the second blade 102 and the third blade 103 on the first protrusion 46 are entirely located in the transport channel 41. When the first protrusion 46 moves to its limit position in the direction away from the transport channel 41, the portion of the second blade 102 and the third blade 103 on the first protrusion 46 located in the transport channel 41 is reduced.

[0065] Both sides of the second blade 102 and both sides of the third blade 103 on the first protrusion 46 have inclined surfaces. When the raw material comes into contact with the first protrusion 46 under the force of the spiral blade 6 and fails to be cut by the second blade 102 and the third blade 103 in one go, the raw material exerts a force on the inclined surfaces of the first protrusion 46, which will drive the first protrusion 46 to move against the force of several elastic elements 9. During this process, the raw material will be squeezed between the spiral blade 6 and the first protrusion 46, which can drive the excess water in the raw material to be further separated, thereby improving the solid-liquid separation effect. At the same time, it can facilitate the smooth rotation of the spiral blade 6 when the raw material fails to be cut by the second blade 102 and the third blade 103 in one go, so that the first protrusion 46 can pass smoothly through the relief groove 62, thereby reducing the impact of the raw material failing to be cut by the first protrusion 46 in one go on the normal rotation of the spiral blade 6.

[0066] Furthermore, to ensure rapid solid-liquid separation of the water released from the raw material after compression, and to reduce the impact of the water flowing downwards along the transport channel 41 on the raw material below, the bottom of the transport pipe 4 also has a water collection channel 45 below the transport channel 41. After the water collection frame 8 is connected to the transport pipe 4, the inclined lower end of the water collection channel 45 can communicate with the water collection tank 81. Several water collection holes 44 are opened on the transport pipe 4 between the transport channel 41 and the water collection channel 45. The two ends of the water collection holes 44 are respectively connected to the transport channel 41 and the water collection channel 45, and the several water collection holes 44 are respectively located on the periphery of several first protrusions 46.

[0067] Reference Figure 2 and Figure 6 The end of the first protrusion 46 furthest from the transport channel 41 is located in the water collection channel 45, and the end of the first protrusion 46 located in the water collection channel 45 has several plugs 461 adapted to the water collection holes 44. When the first protrusion 46 is held at the limit position closest to the transport channel 41 under the action of several elastic members 9, the several plugs 461 respectively block the several water collection holes 44 around the first protrusion 46. At this time, the water in the transport channel 41 cannot flow into the water collection channel 45 through the water collection holes 44. When the first protrusion 46 is squeezed and overcomes the action of several elastic members 9, it moves a certain distance away from the transport channel 41. The blockage of the several water collection holes 44 around the first protrusion 46 by the several plugs 461 is released. At this time, the water in the transport channel 41 can flow into the water collection channel 45 through the water collection holes 44, and finally flow into the water collection frame 8 for collection.

[0068] Furthermore, preferably, the water collection hole 44 is flared towards the water collection channel 45, and as the first protrusion 46 moves away from the transport channel 41, the effect of the plug 461 on unblocking the water collection hole 44 gradually increases. That is, the space in the water collection hole 44 for water to flow into the water collection channel 45 gradually increases, so that the first protrusion 46 can move relative to the transport pipe 4 with its own degree of compression, so that the water that is squeezed out from the raw material can flow into the water collection channel 45 in time through the water collection hole 44.

[0069] Reference Figure 4 and Figure 6 Furthermore, the transport pipe 4 has a plurality of second protrusions 47 on the inner wall of the transport channel 41. These second protrusions 47 are distributed on the inner wall of the transport channel 41 at positions that avoid the distribution of the first protrusions 46, and are equally spaced both along the axial direction of the transport pipe 4 and along the rotation direction of the rotating shaft 5. During the rotation of the helical blade 6, the second protrusions 47 can also pass through the corresponding clearance grooves 62.

[0070] When the raw material adheres to the area of ​​the inner wall of the transport channel 41 except for the bottom as it moves in the transport channel 41, the raw material will be concentrated and adhered to the area around the second protrusion 47. When the spiral blade 6 rotates, the raw material adhering to the second protrusion 47 can be scraped off by the spiral blade 6 as the second protrusion 47 passes through the relief groove 62.

[0071] Furthermore, the second protrusion 47 has a fourth cutting edge 104 at one end opposite to the rotation direction of the rotating shaft 5. When raw material adheres to the side of the second protrusion 47 near the fourth cutting edge 104, the rotation of the spiral blade 6 can drive the raw material to contact the second protrusion 47, and the raw material will be cut by the fourth cutting edge 104 under the force exerted by the spiral blade 6.

[0072] Furthermore, the spiral blade 6 also has a number of cutting elements 63. The cutting elements 63 are all located on the end face of the spiral blade 6 that is in contact with the raw material and is used to drive the raw material to move upward along the transport channel 41. The distance between the cutting elements 63 and the axis of the rotating shaft 5 is equal, and the cutting elements 63 are evenly distributed on the spiral blade 6 along the spiral trajectory of the spiral blade 6.

[0073] The cutting element 63 has a fifth blade 105 at one end along the rotation direction of the rotating shaft 5. During the rotation of the spiral blade 6, the cutting element 63 can pass through the raw material located at the bottom of the transport channel 41, thereby cutting the raw material that has been crushed poorly by the crushing equipment 1 (i.e. the raw materials are still stuck together by fibers), and improving the crushing effect of the raw material.

[0074] Furthermore, the end of the cutting element 63 near the rotating shaft 5 also has a sixth blade 106. When the fifth blade 105 rotates with the spiral blade 6 to cut the raw material that has been crushed poorly by the crushing equipment 1 and the raw material cannot be cut in one go, the raw material to be cut will move together with the cutting element 63. During the process of moving together with the cutting element 63, the raw material to be cut will be subjected to centrifugal force and come into contact with the sixth blade 106. The fifth blade 105 and the sixth blade 106 will cut the sticky parts of the raw material at the same time. At the same time, during the process of moving together with the cutting element 63, the part of the raw material away from the sticky part can come into contact with the second protrusion 47, which increases the resistance of the raw material to be cut, thereby improving the cutting effect of the fifth blade 105 and the sixth blade 106.

[0075] The implementation principle of a multi-stage fish paste grinding device according to an embodiment of this application is as follows:

[0076] Frozen raw materials are first crushed by crushing equipment 1, and then transported by conveying equipment 2 to the next crushing equipment 1 with higher crushing precision for secondary crushing. This cycle is repeated until the raw materials with the required fineness are obtained.

[0077] During the transportation of raw materials, the driving component 7 drives the rotating shaft 5 to rotate, which in turn drives the spiral blade 6 to rotate. The spiral blade 6 then drives the raw materials in the transportation channel 41 to move along the transportation direction.

[0078] During the rotation of the spiral blade 6, the solid-liquid separation of the raw material and the water separated from the raw material can be promoted. The separated water can flow into the water collection frame 8 along the transport channel 41 for collection or after triggering the first protrusion 46 to move, it can enter the water collection channel 45 through the water collection hole 44 and then flow into the water collection frame 8 for collection. This can reduce the impact of water remaining in the transport channel 41 for a long time on the quality of fish paste.

[0079] Furthermore, during the rotation of the spiral blade 6, the raw materials can be cut by the first blade 101, the second blade 102, the third blade 103, the fourth blade 104, the fifth blade 105, and the sixth blade 106, thereby ensuring that the raw materials are better crushed before entering the next crushing device 1, improving crushing efficiency and effect, and thus improving the quality of the final fish paste product.

[0080] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A multi-stage fish paste grinding device, comprising a plurality of crushing devices (1) and a plurality of conveying devices (2), wherein each conveying device (2) is connected to two of the crushing devices (1), and the crushing precision of the plurality of crushing devices (1) gradually increases along the conveying direction; wherein each conveying device (2) comprises a driving component (7), a rotating shaft (5), a spiral blade (6), and a conveying pipe (4), characterized in that, The transport pipe (4) is inclined and has a transport channel (41) inside; the rotating shaft (5) is located in the transport channel (41) and is rotatably connected to the transport pipe (4), and the rotation axis of the rotating shaft (5) is parallel to the transport direction of the transport pipe (4); the spiral blade (6) is disposed on the rotating shaft (5) and contacts and abuts against the inner wall of the transport channel (41); the driving member (7) is disposed on the transport pipe (4) and can drive the rotating shaft (5) to rotate, and the spiral blade (6) can drive the raw material to move inclined upward along the transport channel (41) as the rotating shaft (5) rotates; The spiral blade (6) is provided with several drainage holes (61) for water to drain out. The lower inclined end of the transport pipe (4) is also provided with a water collection frame (8). The water collection frame (8) is detachably connected to the transport pipe (4). The inside of the water collection frame (8) is a water collection trough (81), and the water collection trough (81) is connected to the lower inclined end of the transport channel (41). The outer edge of the spiral blade (6) is provided with a plurality of relief grooves (62), the relief grooves (62) penetrate the spiral blade (6) in a direction perpendicular to the rotation axis (5) and the relief grooves (62) can allow water to pass through; The transport pipe (4) has a plurality of first protrusions (46) at the bottom of the transport channel (41), the first protrusions (46) being adapted to the relief grooves (62); when the spiral blade (6) rotates with the rotating shaft (5), the first protrusions (46) can pass through the corresponding relief grooves (62). The first protrusion (46) has a second blade (102) at one end opposite to the rotation direction of the rotating shaft (5), and the first protrusion (46) has a third blade (103) at one end near the lower end of the transport pipe (4). The transport pipe (4) is provided with a water collection channel (45) below the transport channel (41). The transport pipe (4) is also provided with a plurality of water collection holes (44) for connecting the transport channel (41) and the water collection channel (45). The water collection channel (45) is connected to the water collection tank (81). It also includes several elastic elements (9), the first protrusion (46) is movably connected to the transport pipe (4), the two ends of the elastic element (9) are respectively connected to the first protrusion (46) and the transport pipe (4), and the elastic element (9) drives the first protrusion (46) to remain exposed in the transport channel (41); The first protrusion (46) is located in the water collection channel (45), and the first protrusion (46) has a plurality of plugs (461) at one end of the water collection channel (45). The plugs (461) are adapted to the water collection hole (44), and the elastic member (9) drives the plugs (461) to block the water collection hole (44).

2. The multi-stage fish paste grinding device according to claim 1, characterized in that, The surface of the spiral blade (6) has a first cutting edge (101) for cutting raw materials on both sides of the relief groove (62).

3. The multi-stage fish paste grinding device according to claim 1, characterized in that, The transport pipe (4) also has a number of second protrusions (47) on the inner wall of the transport channel (41). The second protrusions (47) are adapted to the relief groove (62). When the spiral blade (6) rotates with the rotating shaft (5), the second protrusions (47) can pass through the corresponding relief groove (62), and the second protrusions (47) have a fourth blade (104) at both ends along the rotation direction of the rotating shaft (5).

4. The multi-stage fish paste grinding device according to claim 1, characterized in that, The surface of the spiral blade (6) also has a plurality of cutting elements (63), and the end of the cutting element (63) that contacts the raw material along the rotation direction of the rotating shaft (5) has a fifth blade (105).

5. The multi-stage fish paste grinding device according to claim 4, characterized in that, The cutting element (63) has a sixth cutting edge (106) at one end near the rotating shaft (5).

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