A feeding device for aquaculture and a method for measuring the amount of feed in the feed bin

Abstract

The present invention discloses a feeding device for aquaculture, comprising a feeder connected to a feeding line, a feeding device housing connected to an outlet of the feeder through a feeding conduit, a silo located at the center of the feeding device housing, and a spiral feeder located at the bottom of the silo; the silo is composed of a cylinder and a truncated cone connected to the cylinder; two laser distance measuring sensors arranged at intervals in the horizontal direction are fixed to the top surface of the silo, which are used to measure the distance between the bait inside the silo and the top of the silo; a buffer brush is installed at the vertical intersection of the lower end of the silo and the spiral feeder, which is used to prevent the feed from directly contacting the hard wall in the vertical direction when moving. The present invention also discloses a method for measuring the amount of bait in the silo of a feeding device for aquaculture. The present invention has a simple structure, convenient repair and maintenance, is less affected by the outside world, has good stability, is more accurate in controlling the amount of bait fed into the silo, and has a smaller error range.

Description

Technical Field

[0001] The invention belongs to the technical field of aquaculture, and more specifically relates to a feeding device for aquaculture and a method for measuring the amount of feed in a silo. Background Art

[0002] At present, pond farming and factory-scale recirculating aquaculture models have been rapidly promoted and applied in China. The farming characteristics of these two farming models are that farming is carried out in farming ponds. The number of farming ponds can usually reach hundreds or thousands, and batch feeding mode is required for feeding bait. However, the current feeding equipment in China cannot be managed in a unified manner in large quantities and cannot meet this farming model.

[0003] In addition, the amount of bait in aquatic bait feeding devices and storage bins is currently mainly fed back by the measurement of weighing sensors. Although weighing sensors can obtain relatively accurate weight parameters, the accuracy of their parameters is affected by many external factors, such as whether the calibration is accurate, whether the ground is level, equipment shaking or movement, etc., which will have a certain degree of impact on the sensor's value. The specific data obtained has a certain error with the actual value and is unstable.

[0004] Based on this, designing a feed feeding device suitable for batch management and a method for measuring the amount of feed inside the storage bin has important practical significance for the current development of pond farming and factory recirculating aquaculture models. Summary of the invention

[0005] In view of the defects of the above-mentioned technology, the technical problem to be solved by the present invention is to provide a feeding device for aquaculture and a method for measuring the amount of bait in the silo, which has a simple structure, is easy to repair and maintain, is less affected by the outside world, has good stability, can more accurately control the amount of bait fed into the silo, and has a smaller error range.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical measures:

[0007] The feeding device for aquaculture of the present invention is located above each breeding pond and is installed in combination with a feeding line for conveying bait, and comprises a feeder connected to the feeding line, a feeding device housing connected to an outlet of the feeder through a feeding conduit, a silo located at the center of the feeding device housing, and a spiral feeder located at the bottom of the silo; the silo is composed of a cylinder and a truncated cone connected to the cylinder; two laser distance measuring sensors arranged at intervals in the horizontal direction are fixed to the top surface of the silo, which are used to measure the distance between the bait inside the silo and the top of the silo; a buffer brush is installed at the vertical intersection of the lower end of the silo and the spiral feeder, which is used to prevent the feed from directly contacting the hard wall in the vertical direction when moving.

[0008] Optionally, the feed conduit is located on the central axis of the bait feeding device housing.

[0009] Optionally, the spiral feeder is driven by a driving motor arranged at its side end. The spiral feeder rotates when driven by the driving motor to push the bait in the silo out and throw it out from the discharge port at the lower end of the spiral feeder.

[0010] Preferably, a motor and a feed push plate are fixed inside the feeder, and the motor pushes the feed push plate to move horizontally along the direction of the feed conveying line to control the falling of the bait.

[0011] Furthermore, the silo and the outer shell of the feeding device are provided with a material level observation port for observing the remaining bait inside the silo.

[0012] Furthermore, a stopper chain is provided in the feed line, and the stopper chain is driven by a driving device to circulate in the feed line to transport the bait in the feed line to the feeder above the breeding pond, and the excess bait returns to the storage bin installed on the ground at the return pipe.

[0013] The method for measuring the amount of bait in the feed bin of the feeding device for aquaculture of the present invention is:

[0014] Step 1. According to the breeding needs, the feeding device adopts the mode of feeding as much as the amount is fed or the mode of feeding in one day in different time periods. When the mode of feeding as much as the amount is fed is adopted, the feeding amount each time only needs to measure the total amount of the feed this time, and then the feeding device throws out all the feed in the silo; when the mode of feeding in one day in different time periods is adopted, the feeding amount in the silo and the remaining amount after a single feeding must be measured to achieve time-based quantitative feeding;

[0015] Step 2: The volume of the bait in the silo is calculated in two ways according to the design of the silo. The volume of the bait in the silo is calculated by two laser ranging sensors.

[0016] Step 3: When the bottom of the conical accumulation part of the bait in the silo is inside the cylinder of the silo, the volume of the bait in the silo is calculated as follows:

[0017] The volume of bait in the silo is expressed as:

[0018] V=V 11 +V 12 +V 13

[0019]

[0020]

[0021]

[0022] From H1 and H2, we can calculate:

[0023]

[0024] H=(R1-L4)tanθ1+H2

[0025] in

[0026] h=R1tanθ1

[0027] It turns out that:

[0028]

[0029] The volume of bait in the silo is calculated based on H1 and H2 measured by the laser sensor;

[0030] Where: R1-radius of the cylinder of the silo;

[0031] r - radius of the facet of the truncated cone of the silo;

[0032] L1-height of the cylinder of the silo;

[0033] L2 - height of the truncated cone of the silo;

[0034] L3, L4 - the distance between the installation position of the two laser distance measuring sensors and the central axis of the silo;

[0035] H-the distance between the bottom of the conical accumulation part of the bait and the top of the silo;

[0036] H1, H2 - distances measured by two laser rangefinders;

[0037] θ1-the stacking angle of the conical stacking part of the bait;

[0038] θ2-Angle between the side wall of the truncated cone of the silo and the horizontal direction;

[0039] V-the volume of bait in the silo;

[0040] V 11 - Volume of the frustum of the bait in the silo;

[0041] V 12 - Volume of the cylinder of bait in the silo;

[0042] V 13 -The volume of the conical accumulation part of the bait in the silo;

[0043] h-the height of the conical accumulation part of the bait in the silo;

[0044] Step 4: When the bottom surface of the conical accumulation part of the bait in the silo is within the truncated cone of the silo, the volume of the bait in the silo is calculated as follows:

[0045] V=V 22 +V 23

[0046]

[0047]

[0048]

[0049] H3=H2-L4tanθ1

[0050] EC=R2tanθ2

[0051]

[0052] DE=rtanθ2

[0053] DC=EC-DE

[0054] So the volume of bait in the silo is:

[0055]

[0056] It can be seen that h in the above formula is the change value

[0057] And by

[0058] h=L1+L2-H3-DC

[0059] So we can get

[0060]

[0061] The volume of bait in the silo is calculated based on H1 and H2 measured by the laser sensor;

[0062] Where: R2-the radius of the bottom of the conical accumulation part of the bait in the silo;

[0063] H3-the distance between the vertex of the conical accumulation part of the bait and the top of the silo;

[0064] V 21 - the volume of the cone from which the truncated cone of the silo extends;

[0065] V 22 - Volume of the frustum of the bait in the silo;

[0066] V 23 -The volume of the conical accumulation part of the bait in the silo;

[0067] Point C is the intersection of the geometric centers of the triangle and trapezoid of the cross-section of the bait, Point D is the intersection of the bottom surface of the silo and the central axis, and Point E is the intersection point obtained by extending the side wall of the truncated cone of the silo outward, which is located on the central axis of the silo.

[0068] From the above, for the feeding device, the laser distance sensor is relatively cheap compared to the weighing sensor. The use of the laser distance sensor combined with geometric calculation can more accurately control the amount of bait fed into the silo, and the error range is smaller. Considering the complex outdoor working environment, the measurement method of the present invention is less affected by the outside world and has better stability. When the feeding device is used in batches, the inspection personnel can observe the remaining amount of bait inside the silo more intuitively through the material level observation port of each feeding device, which is convenient for the administrator to better understand the working condition of the feeding device.

[0069] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0070] 1. The feeding device combines the existing pond farming and factory recirculating aquaculture farming models and needs. The feeding device combines the existing feed lines to achieve long-distance transmission and long-distance feeding of bait.

[0071] 2. The feeding device uses a laser distance sensor to measure the distance between the bait and the top of the silo. The volume of the bait in the silo can be estimated by combining the geometric characteristics of the bait after it falls and the geometric relationship in the silo. The volume parameters of the bait measured by this method are not easily affected by the outside world, and the error is small. Compared with weighing sensors that are easily affected by position, external shaking, and material strain, the results are more accurate.

[0072] The feed amount and the remaining amount can be controlled by calculating the measured parameters of the two laser distance sensors. Whether the bait in the silo has been fed can be determined by the measured value of the laser distance sensor as a reference to determine whether all the bait has been fed. The feeding requirement of the feeding device is to control the amount of bait fed according to the amount of bait required or to feed the bait fed for one day in a quantitative manner within the same day to ensure that there is no remaining bait in the silo within the same day, because the bait in the water environment is easily damp and deteriorated when exposed to the air, and the deteriorated bait will have a certain degree of impact on the health of the fish.

[0073] 3. For puffed granular fish feed, the feed crushing rate is relatively high when feeding. After the crushed feed is put into the water, the fish cannot ingest it and it will pollute the water quality. The feeding device is equipped with a buffer brush at the vertical intersection of the lower end of the silo and the spiral feeder. Combined with the installation position and the elasticity of the hard brush, a buffer zone can be provided for the feed, which can avoid direct contact between the feed and the hard wall in the vertical direction when moving, and reduce the crushing rate of the feed in the feeding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0075] Figure 1 This is an application scenario diagram of the feeding device for aquaculture of the present invention;

[0076] Figure 2 It is a specific installation diagram of the bait feeding device for aquaculture of the present invention;

[0077] Figure 3 It is a schematic structural diagram of a storage bin for aquaculture of the present invention;

[0078] Figure 4 It is a schematic diagram of the internal structure of the bait feeding device for aquaculture of the present invention;

[0079] Figure 5 It is a schematic diagram of the installation and structure of the buffer brush of the present invention;

[0080] Figure 6 This is one of the schematic diagrams of the distribution of bait in the silo;

[0081] Figure 7 This is the second schematic diagram of the bait distribution in the silo.

[0082] Among them: 1. Material level sensor, 2. Feed return pipe, 3. Storage silo, 4. Electric control cabinet, 5. Driving device, 6. Feeding line, 7. Fixed frame, 8. Breeding pond, 9. Feeder, 10. Feeding device, 11. Shell observation port, 12. Feeding port, 13. Feeding duct, 14. Laser ranging sensor, 15. Feeding device shell, 16. Silo, 17. Material level observation port, 18. Buffer brush, 19. Spiral feeder, 20. Motor mounting seat, 21. Coupling, 22. Driving motor, 23. Support frame, 24. Discharging port. DETAILED DESCRIPTION

[0083] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0084] like Figures 1 to 7As shown, the feeding device for aquaculture of the present invention is used in a feeding system. The entire feeding system includes an electric control system, a storage bin 3, a conveying device and a feeding device. The storage bin 3 is installed on the ground. A feed outlet 12 is provided at the bottom of the storage bin 3. The bait is placed in the storage bin 3 and enters the feeding device through the feed outlet 12. The feeding device includes a feeding line 6, a plug disc chain and a driving device 5. The feeding line 6 is fixed on a fixed frame 7 and is located above a plurality of breeding pools 8. The plug disc chain is provided in the feeding line 6. The driving device 5 is used to drive the plug disc chain to circulate in the feeding line 6, and transport the bait in the feeding line 6 to the feeder 9 above the breeding pool 8. The excess bait returns to the storage bin 3 at the return pipe 2. The feeding system also includes an electric control cabinet 4 that provides power to each device.

[0085] refer to Figures 2 to 5 The feeding device for pond culture and circulating water culture of the present invention is installed above each culture pond 8 and is installed in combination with the feeding line 6. The feed in the storage bin 3 enters the feeding line 6 from the feeding port, and the feeding line 6 remotely transports the feed to each feeding device. A material level sensor 1 is also installed on the feeding line 6.

[0086] The feeding device of the present invention comprises a feeder 9, a feeding conduit 13, a feeding device housing 15, a laser distance sensor 14, a silo 16, a spiral feeder 19, a support frame 23, a buffer brush 18 and a material level observation port 17. The feeder 9 is installed on the feeding line 6 of the external bait, and a motor and a feeding push plate are fixed inside the feeder 9. The motor can push the feeding push plate to move horizontally along the direction of the feeding line to control the falling of the bait. The shell 15 of the feeding device is provided with a shell observation port 11, and the shell 15 of the feeding device is provided with a laser distance sensor 14, a silo 16, a spiral feeder 19 and a support frame 23. Two laser distance sensors 14 are fixed to the feeding device housing 15 at a certain distance in the horizontal direction through a sensor connector, and are located on the top surface of the silo 16, and are used to measure the distance between the bait inside the silo 16 and the top of the silo, so as to control the feeding amount of the bait in the silo 16.

[0087] The silo 16 is composed of a cylinder and a truncated cone connected to the cylinder, and the truncated cone is located below the cylinder. The silo 16 is connected to the upper end of the spiral feeder 19, and the spiral feeder 19 is fixed on a support frame 23, and the support frame 23 is fixed on the bait feeding device housing 15, wherein the center position of the silo 16 is aligned with the center position of the bait feeding device housing 15, and the spiral feeder 19 is driven by a drive motor 22 arranged at its side end, and the drive motor 22 is installed on a motor mounting seat 20 and connected to a coupling 21. The spiral feeder 19 rotates under the drive of the drive motor 22, pushes out the bait in the silo 16, and throws it out from the discharge port 24 at the lower end of the spiral feeder 19. The two ends of the feed conduit 13 are respectively connected to the feeding device housing 15 and the outlet of the feeder 9, wherein the feed conduit 13 is located on the central axis of the feeding device housing 15, and the buffer brush 18 is installed at the vertical intersection of the lower end of the silo 16 and the spiral feeder 19. Combined with the installation position and the elasticity of the hard brush, a buffer zone is provided for the feed, which can avoid direct contact between the feed and the hard wall in the vertical direction when the feed moves, reduce the risk of jamming, and reduce the breakage rate of the feed in the feeding device. The material level observation port 17 is made of a transparent acrylic plate material, which is respectively fixed on the silo 16 and the feeding device housing 15, and the remaining bait inside the feeding device can be directly seen.

[0088] See also Figure 6 and Figure 7 As shown, the method for measuring the amount of bait in the feed bin of the feeding device for aquaculture of the present invention is:

[0089] S1. Install the same laser distance measuring sensors 14 at points A and B to measure the distance between the bait in the bin and the bin top. The bait is transported to the feeding device by the feeding line 6, and falls into the center of the bin 16 through the feeding conduit 13. After the bait falls into the bin, a stacking angle is generated to form a conical stacking part, and the stacking angle generated each time is slightly different due to the different baits. The stacking angle can be calculated more accurately by the two laser distance measuring sensors 14 at points A and B, providing basic parameters for calculating the volume of the bait in the bin 16 in the next step.

[0090] S2. According to the breeding needs, the feeding device can feed in a mode of feeding as much as it is fed or a mode of feeding in one day in a time-sharing manner. When the mode of feeding as much as it is fed is adopted, the feeding amount each time only needs to measure the total amount of bait this time, and then the feeding device feeds all the bait in the silo 16; when the mode of feeding in one day in a time-sharing manner is adopted, the feed amount in the silo and the surplus after a single feeding must be measured to achieve time-sharing and quantitative feeding.

[0091] S3. The volume of the bait in the silo is calculated in two ways according to the design of the silo. The volume of the bait in the silo 16 can be calculated by two laser distance measuring sensors 14 .

[0092] S4. According to the shape of the silo and the installation method of the sensor, the specific calculation steps are as follows:

[0093] Figure 6 Schematic diagram of bait distribution in the silo. The shadow is the bait accumulation area. The parameters L, L1, L2, L3, L4, R1, r, θ2, H1, H2 are all known, among which H1 and H2 are measured by the laser ranging sensor 14, 0

[0094] First, from H1 and H2 we can calculate:

[0095]

[0096] H=(R1-L4)tanθ1+H2

[0097] When H≤L1, that is, the bottom of the conical accumulation part of the bait in the silo is inside the cylinder of the silo:

[0098] The volume of bait can be expressed as:

[0099] V=V 11 +V 12 +V 13

[0100]

[0101]

[0102]

[0103] in

[0104] h=R1tanθ1

[0105] L=L1+L2

[0106] It turns out that:

[0107]

[0108] Therefore, under this condition, the volume of bait in the silo can be calculated based on H1 and H2 measured by the laser sensor.

[0109] Where:

[0110] R1-radius of the cylinder of the silo;

[0111] ​r - radius of the facet of the truncated cone of the silo;

[0112] L1-height of the cylinder of the silo;

[0113] L2 - height of the truncated cone of the silo;

[0114] L3, L4 - the distance between the installation position of the two laser distance measuring sensors and the central axis of the silo;

[0115] H-the distance between the bottom of the conical accumulation part of the bait and the top of the silo;

[0116] H1, H2 - distances measured by two laser rangefinders;

[0117] θ1-the stacking angle of the conical stacking part of the bait;

[0118] θ2-Angle between the side wall of the truncated cone of the silo and the horizontal direction;

[0119] V-the volume of bait in the silo;

[0120] V 11 - Volume of the frustum of the bait in the silo;

[0121] V 12 - Volume of the cylinder of bait in the silo;

[0122] V 13 -The volume of the conical accumulation part of the bait in the silo;

[0123] h-the height of the conical accumulation part of the bait in the silo;

[0124] like Figure 7 As shown, when H>L1, that is, the bottom surface of the conical accumulation part of the bait in the silo is inside the truncated cone of the silo:

[0125] V=V 22 +V 23

[0126]

[0127]

[0128]

[0129] Point C is the cross section of the bait ( Figure 7 Point D is the intersection of the bottom surface of the silo and the central axis, and point E is the intersection point obtained by extending the side wall of the truncated cone of the silo outward, which is located on the central axis of the silo;

[0130] H3=H2-L4tanθ1

[0131] EC=R2tanθ2

[0132]

[0133] DE=rtanθ2

[0134] DC=EC-DE

[0135] So the volume of bait in the silo is:

[0136]

[0137] It can be seen that h in the above formula is the change value

[0138] And by

[0139] h=L1+L2-H3-DC

[0140] So we can get

[0141]

[0142] When the bottom surface of the conical accumulation part of the bait in the silo is within the truncated cone of the silo, the volume of the bait in the silo can be calculated based on H1 and H2 measured by the laser sensor.

[0143] Taking into account the particularity of the silo structure, in order to determine whether there is bait in the silo, it is stipulated that when H2 = L,

[0144] V=0

[0145] Where:

[0146] R2-the radius of the bottom of the conical accumulation part of the bait in the silo;

[0147] H3-the distance between the vertex of the conical accumulation part of the bait and the top of the silo;

[0148] V 21 - the volume of the cone from which the truncated cone of the silo extends;

[0149] V 22 - Volume of the frustum of the bait in the silo;

[0150] V 23 -The volume of the conical accumulation part of the bait in the silo;

[0151] In summary, as long as the values ​​of H1 and H2 are measured, the volume of bait in the silo can be measured.

[0152] For the feeding device, the laser distance sensor is relatively cheap compared to the weighing sensor. The laser distance sensor combined with geometric calculation can more accurately control the amount of bait in the silo, and the error range is smaller. Considering the complex outdoor working environment, the measurement method of the present invention is less affected by the outside world and has better stability. When the feeding device is used in batches, the inspection personnel can observe the remaining amount of bait in the silo more intuitively through the material level observation port of each feeding device, which is convenient for the administrator to better understand the working condition of the feeding device.

[0153] The above description is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be understood by anyone familiar with the technology within the technical scope disclosed by the present invention should be included in the scope of the present invention.

Claims

1. A method for measuring the amount of bait in a silo, characterized in that: The invention comprises a feeding device for aquaculture, which is located above each aquaculture pond and is installed in combination with a feeding line for feeding bait. The feeding device for aquaculture comprises a feeder connected to the feeding line, a feeding device housing connected to an outlet of the feeder through a feeding conduit, a silo located at the center of the feeding device housing, and a spiral feeder located at the bottom of the silo; The silo is composed of a cylinder and a truncated cone connected to the cylinder; two laser distance measuring sensors are fixed on the top surface of the silo and are arranged at intervals in the horizontal direction, so as to measure the distance between the bait inside the silo and the top of the silo; A buffer brush is installed at the vertical intersection of the lower end of the silo and the spiral feeder to prevent the feed from directly contacting the hard wall in the vertical direction when moving; The method for measuring the amount of bait in the feed bin of the feeding device for aquaculture comprises the following steps: Step 1. According to the breeding needs, the feeding device adopts the mode of feeding as much as the amount is fed or the mode of feeding in one day in different time periods. When the mode of feeding as much as the amount is fed is adopted, the feeding amount each time only needs to measure the total amount of the feed this time, and then the feeding device throws out all the feed in the silo; when the mode of feeding in one day in different time periods is adopted, the feeding amount in the silo and the remaining amount after a single feeding must be measured to achieve time-based quantitative feeding; Step 2: The volume of the bait in the silo is calculated in two ways according to the design of the silo. The volume of the bait in the silo is calculated by two laser ranging sensors. Step 3: When the bottom of the conical accumulation part of the bait in the silo is inside the cylinder of the silo, the volume of the bait in the silo is calculated as follows: The volume of bait in the silo is expressed as: V=V 11 +V 12 +V 13 From H1 and H2, we can calculate: H=(R1-L4)tanθ1+H2 in h=R1tanθ1 It turns out that: The volume of bait in the silo is calculated based on H1 and H2 measured by the laser sensor; Where: R1-radius of the cylinder of the silo; r - radius of the facet of the truncated cone of the silo; L1-height of the cylinder of the silo; L2 - height of the frustum of the silo; L3, L4 - the distance between the installation position of the two laser distance measuring sensors and the central axis of the silo; H-the distance between the bottom of the conical accumulation part of the bait and the top of the silo; H1, H2 - distances measured by two laser rangefinders; θ1-the stacking angle of the conical stacking part of the bait; θ2-Angle between the side wall of the truncated cone of the silo and the horizontal direction; V-the volume of bait in the silo; V 11 - Volume of the frustum of the bait in the silo; V 12 - Volume of the cylinder of bait in the silo; V 13 -The volume of the conical accumulation part of the bait in the silo; h-the height of the conical accumulation part of the bait in the silo; Step 4: When the bottom surface of the conical accumulation part of the bait in the silo is within the truncated cone of the silo, the volume of the bait in the silo is calculated as follows: V=V 22 +V 23 H3=H2-L4tanθ1 EC=R2tanθ2 DE=rtanθ2 DC=EC-DE So the volume of bait in the silo is: It can be seen that h in the above formula is the change value And by h=L1+L2-H3-DC So we can get The volume of the bait in the silo is calculated based on H1 and H2 measured by the laser sensor; where: R2 is the radius of the bottom surface of the conical accumulation part of the bait in the silo; H3-the distance between the vertex of the conical accumulation part of the bait and the top of the silo; V 21 - the volume of the cone from which the truncated cone of the silo extends; V 22 - Volume of the frustum of the bait in the silo; V 23 -The volume of the conical accumulation part of the bait in the silo; Point C is the intersection of the geometric centers of the triangle and trapezoid of the cross-section of the bait, Point D is the intersection of the bottom surface of the silo and the central axis, and Point E is the intersection point obtained by extending the side wall of the truncated cone of the silo outward, which is located on the central axis of the silo.

2. The method for measuring the amount of bait in a silo according to claim 1, characterized in that: The feed conduit is located on the central axis of the bait feeding device housing.

3. The method for measuring the amount of bait in a silo according to claim 1, characterized in that: The spiral feeder is driven by a driving motor arranged at its side end. The spiral feeder rotates under the drive of the driving motor, pushes out the bait in the silo, and throws it out from the discharge port at the lower end of the spiral feeder.

4. The method for measuring the amount of bait in a silo according to claim 1, characterized in that: A motor and a feeding push plate are fixed inside the feeder, and the motor drives the feeding push plate to move horizontally along the direction of the feeding line to control the falling of the bait.

5. The method for measuring the amount of bait in a silo according to claim 1, characterized in that: The silo and the outer shell of the feeding device are provided with a material level observation port for observing the remaining bait inside the silo.

6. The method for measuring the amount of bait in a silo according to claim 1, characterized in that: A stopper chain is provided in the feed line, and the stopper chain is driven by a driving device to circulate in the feed line to transport the bait in the feed line to the feeder above the breeding pond, and the excess bait returns to the storage bin installed on the ground at the return pipe.

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