Automatic control feeding system for flowable materials

Abstract

The invention relates to the field of material feeding control, in particular to an automatic control feeding system for flowable materials. The sand discharging device comprises a feeding bin, a material receiving frame, a sand discharging motor, a sand discharging valve, a controller and the like, a sand outlet is formed in the bottom of the feeding bin, the sand discharging motor drives the sand discharging valve to slide, the material receiving frame is located below the sand outlet, and the controller controls the sand discharging motor according to the states of a laser lamp and an optical signal plate. The device can further comprise a support, a conveying motor, a conveying belt and the like. The technical effects that automatic control over feeding of the flowing materials is achieved, feeding and stopping of feeding can be accurately controlled according to the condition of the materials in the material receiving frame, the functions of material conveying and the like are achieved, and the feeding efficiency and accuracy are improved are achieved.

Description

Technical Field

[0001] The present invention relates to the field of material feeding control, in particular to an automatic control feeding system for flowable materials. Background Art

[0002] In the field of flowable material processing, the feeding operation is a common and critical step. With the continuous improvement of industrial automation, higher requirements are placed on the precise control and efficient operation of the flowable material feeding process. Achieving reasonable feeding of flowable materials can improve production efficiency and ensure the stability of product quality. It has a wide range of applications in many industries such as chemical industry, construction, food processing, and water tank testing, and is of great significance for promoting industrial development and improving production efficiency.

[0003] In the past, when dealing with the problem of adding flowable materials, the conventional practice was manual adding, that is, the operator added materials directly to the target container based on experience and observation. This method relies on human judgment and has greater flexibility, but it requires a lot of manpower and is labor-intensive. There are also timed and quantitative feeding devices, which control the feeding by setting time and material quantity parameters using mechanical structures or simple electronic components, but it is difficult to adjust the feeding status in real time according to actual conditions. In addition, some more complex sensor-assisted feeding systems use specific sensors to monitor the material situation to control the feeding, but the sensor functions are single and the control logic is not intelligent enough.

[0004] However, these existing conventional methods have obvious defects. Most of them cannot automatically adjust the feeding action according to the real-time stacking status of the material, cannot adapt well to the changes in material status and the dynamic needs of the actual production process, and are prone to over- or under-feeding, resulting in unsatisfactory subsequent operation results. Summary of the Invention

[0005] In view of the defects existing in the prior art, the purpose of the present invention is to provide an automatic control feeding system for flowable materials, so as to realize automatic feeding and distribution of flowable materials and improve the accuracy of material addition.

[0006] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0007] An automatic control feeding system for flowable materials, comprising a feeding bin, a material receiving frame, a discharge motor, a discharge valve and a controller, wherein

[0008] A sand outlet is formed at the bottom of the feeding bin;

[0009] The discharge motor is fixedly arranged on the outside of the silo wall of the feeding silo, a driving wheel is installed on the driving shaft of the discharge motor, a discharge valve is slidably installed on the bottom of the feeding silo, a sand discharge hole is opened on the discharge valve, the discharge valve is connected to the driving wheel, and the discharge valve can slide under the drive of the driving wheel;

[0010] The material receiving frame is located below the sand outlet, and the lower part of the material receiving frame is open;

[0011] The controller is electrically connected to the discharge motor and includes two laser lamps, two optical signal boards, and a control circuit. The two laser lamps are sequentially arranged on the material receiving frame from top to bottom. The light emitted by the laser lamps penetrates the material receiving frame. The two optical signal boards are respectively arranged opposite to the two laser lamps. The control circuit is electrically connected to the laser lamps, optical signal boards, and the discharge motor.

[0012] When both laser lights illuminate the corresponding light signal board, the control circuit controls the discharge motor to drive the discharge valve to move to the sand discharge hole and connect with the sand outlet;

[0013] When the two laser lights cannot illuminate the corresponding light signal board, the control circuit controls the discharge motor to drive the discharge valve to move to the closed sand outlet.

[0014] Optionally, the control circuit includes a power supply and a single-chip microcomputer controller, and the single-chip microcomputer controller is electrically connected to the power supply, the optical signal board and the discharge motor.

[0015] Optionally, the control circuit includes a power supply, a first double-control switch, a second double-control switch, a first electromagnet, a second electromagnet, a third electromagnet, a fourth electromagnet, a first normally closed switch, a first normally open switch, a first control electromagnet and a second control electromagnet; wherein

[0016] The power supply, the first normally closed switch, the third electromagnet and the fourth electromagnet are connected in series;

[0017] A power supply, a first normally open switch, a first electromagnet, and a second electromagnet are connected in series;

[0018] The power supply, the first contact of the first double-control switch, the first contact of the second double-control switch, and the discharge motor are connected in series;

[0019] The power supply, the second contact of the first double-control switch, the second contact of the second double-control switch, and the discharge motor are connected in series;

[0020] The optical signal board is a photoelectric board, one of which is connected in series with a first control electromagnet. The first control electromagnet is arranged opposite to the first normally closed switch. When the first control electromagnet is energized, the first normally closed switch is opened.

[0021] Another photoelectric panel is connected in series with the second control electromagnet, and the second control electromagnet is arranged opposite to the first normally open switch. When the second control electromagnet is energized, the first normally open switch is closed.

[0022] Optionally, the control circuit further includes a second normally closed switch and a third normally closed switch; the second normally closed switch is connected in series with the power supply, the first contact of the first double-control switch, the first contact of the second double-control switch, and the discharge motor; the third normally closed switch is connected in series with the power supply, the second contact of the first double-control switch, the second contact of the second double-control switch, and the discharge motor;

[0023] One end of the discharge valve is connected to an insulating pressure rod. When the discharge motor drives the discharge valve to move to the sand discharge hole and connect with the sand outlet, the insulating pressure rod abuts the second normally closed switch to disconnect the second normally closed switch; when the discharge motor drives the discharge valve to move to close the sand outlet, the insulating pressure rod abuts the third normally closed switch to disconnect the third normally closed switch.

[0024] Optionally, the levers of the first double-control switch and the second double-control switch are both arranged vertically, and when the levers are connected to the contacts, the levers are arranged tilted.

[0025] Optionally, the first electromagnet and the third electromagnet are respectively installed on both sides of the first double-control switch; the second electromagnet and the fourth electromagnet are respectively installed on both sides of the second double-control switch.

[0026] Optionally, the automatic control feeding system for flowable materials further comprises a bracket, a conveying motor and a conveyor belt; the conveyor belt is mounted on the bracket; the conveying motor is in driving connection with the conveyor belt;

[0027] The material receiving frame includes a top plate, two side plates and a funnel. The top plate is arranged horizontally above the conveyor belt. The two side plates are fixedly installed on both sides of the top plate, and the lower edges of the two side plates are in contact with the upper surface of the conveyor belt; the funnel is fixedly installed above the top plate and is connected to the space below the top plate.

[0028] Optionally, the power supply of the control circuit is connected in series with the conveying motor through a sliding rheostat.

[0029] Optionally, a pulley is installed on the rotating shaft of the conveying motor, and the conveyor belt includes two rotating shafts and a flat belt wrapped around the two rotating shafts; the pulley is connected to one of the rotating shafts of the conveyor belt through a belt.

[0030] Optionally, the power supply of the control circuit is connected in series with a master control switch, and the master control switch is used to control the on and off of the entire circuit.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The automatic control feeding system of flowable materials in the present application can use laser lights and light signal boards to respond to the material conditions in the material receiving frame. According to the detection results, the control circuit controls the discharge motor to drive the discharge valve, so as to realize automatic feeding and stopping of flowable materials from the feeding bin through the sand outlet and sand discharge holes to the material receiving frame. The feeding action can be automatically adjusted according to the real-time stacking status of the material in the material receiving frame, avoiding the uncertainty of manual operation and eliminating the need for manual monitoring and adjustment. It can effectively adapt to changes in material status and dynamic needs in the actual production process, and prevent over- or under-feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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 the structures shown in these drawings without paying any creative work.

[0034] Figure 1 Schematic diagram of the overall structure of the automatic control feeding system for flowable materials of the present invention;

[0035] Figure 2 for Figure 1 A circuit diagram of a middle power source, a first normally open switch, a first electromagnet, and a second electromagnet connected in series;

[0036] Figure 3 for Figure 1 A circuit diagram of a middle power source, a first normally closed switch, a third electromagnet, and a fourth electromagnet connected in series;

[0037] Figure 4 for Figure 1 A circuit diagram in which a middle power source, a first contact of a first double-control switch, a first contact of a second double-control switch, and a discharge motor are connected in series;

[0038] Figure 5 for Figure 1 A circuit diagram in which a middle power source, a second contact of a first double-control switch, a second contact of a second double-control switch, and a discharge motor are connected in series.

[0039] In the figure: 1. Feeding bin; 2. Material receiving frame; 3. Discharge motor; 4. Discharge valve; 5. Laser lamp; 6. Photoelectric panel; 7. Power supply; 8. First double-control switch; 9. Second double-control switch; 10. First electromagnet; 11. Second electromagnet; 12. Third electromagnet; 13. Fourth electromagnet; 14. First normally closed switch; 15. First normally open switch; 16. First control electromagnet; 17. Second control electromagnet; 18. Second normally closed switch; 19. Third normally closed switch; 20. Insulating pressure rod; 21. Bracket; 22. Conveyor motor; 23. Conveyor belt; 24. Top plate; 25. Side plate; 26. Funnel; 27. Sliding rheostat; 28. Master control switch. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0041] Example 1

[0042] Combine Figures 1 to 5 As shown, an embodiment of the present invention discloses an automatic controlled feeding system for flowable materials, comprising a feeding bin 1, a material receiving frame 2, a discharge motor 3, a discharge valve 4, and a controller. A sand outlet is formed at the bottom of the feeding bin 1. The discharge motor 3 is fixedly mounted on the exterior of the bin wall of the feeding bin 1. A drive wheel is mounted on the drive shaft of the discharge motor 3. The discharge valve 4 is slidably mounted on the bottom of the feeding bin 1. A sand discharge hole is formed in the discharge valve 4. The size of the sand discharge hole is adapted to the sand outlet to ensure smooth passage of material. The discharge valve 4 is connected to the drive wheel and can slide under the drive wheel's drive. A guide rail is provided between the discharge valve 4 and the bottom of the feeding bin 1. The guide rail ensures smooth sliding of the discharge valve 4. Alternatively, a chute or other structure can be used. The discharge valve 4 is made of a wear-resistant metal, such as stainless steel, to ensure its service life. The transmission between the discharge valve 4 and the drive wheel can be achieved by a chain, a rack, or other means, so that the drive wheel drives the discharge valve 4 to slide.

[0043] The receiving frame 2 is located below the sand outlet and has an opening below. The feeding bin 1 is used to store flowable materials, and the receiving frame 2 is used to receive the materials flowing out of the feeding bin 1. The discharge motor 3 provides power for the movement of the discharge valve 4, which controls the outflow of materials from the feeding bin 1.

[0044] The controller of this embodiment is electrically connected to the discharge motor 3. The controller includes two laser lamps 5, two optical signal boards and a control circuit. The two laser lamps 5 are arranged on the material receiving frame 2 from top to bottom. The light emitted by the laser lamps 5 penetrates the material receiving frame 2. The two optical signal boards are respectively arranged opposite to the two laser lamps 5. It is worth noting that in actual use, due to the limitation of the installation space, an optical fiber tube can be installed between the laser lamp 5 and the optical signal board, and the light energy of the laser lamp 5 is irradiated to the optical signal board through the conduction effect of the optical fiber tube.

[0045] The control circuit of this embodiment is electrically connected to the laser lights 5, the optical signal board, and the discharge motor 3. When both laser lights 5 illuminate the corresponding optical signal board, indicating that there is less material in the material receiving frame 2, the control circuit controls the discharge motor 3 to drive the discharge valve 4 to move until the sand discharge hole is connected to the sand outlet, and material flows from the feeding bin 1 into the material receiving frame 2. When neither laser light 5 illuminates the corresponding optical signal board, indicating that there is more material in the material receiving frame 2, the control circuit controls the discharge motor 3 to drive the discharge valve 4 to move to close the sand outlet, stopping the feeding. The controller controls the operation of the discharge motor 3 according to the material accumulation state in the material receiving frame 2, achieving the effect of automatically adjusting the feeding action according to the real-time material accumulation state, adapting to changes in material state and actual dynamic needs, avoiding over- or under-feeding, improving production efficiency, and ensuring stable product quality. This is because the controller can accurately sense the material accumulation state and thus timely control the opening and closing of the discharge valve 4.

[0046] Furthermore, the control circuit of this embodiment includes a power supply 7, a first double-control switch 8, a second double-control switch 9, a first electromagnet 10, a second electromagnet 11, a third electromagnet 12, a fourth electromagnet 13, a first normally closed switch 14, a first normally open switch 15, a first control electromagnet 16 and a second control electromagnet 17; Figure 2 As shown, the power supply 7, the first normally closed switch 14, the third electromagnet 12, and the fourth electromagnet 13 are connected in series; Figure 3 As shown, the power supply 7, the first normally open switch 15, the first electromagnet 10, and the second electromagnet 11 are connected in series; Figure 4 As shown, the power supply 7, the first contact of the first double-control switch 8, the first contact of the second double-control switch 9, and the discharge motor 3 are connected in series; Figure 5 As shown, the power supply 7, the second contact of the first double-control switch 8, the second contact of the second double-control switch 9, and the discharge motor 3 are connected in series.

[0047] It is worth noting that the optical signal board in this embodiment is a photoelectric board 6. One photoelectric board 6 is connected in series with a first control electromagnet 16, and the first control electromagnet 16 is arranged opposite to the first normally closed switch 14. When the first control electromagnet 16 is energized, the first normally closed switch 14 is opened; the other photoelectric board 6 is connected in series with a second control electromagnet 17, and the second control electromagnet 17 is arranged opposite to the first normally open switch 15. When the second control electromagnet 17 is energized, the first normally open switch 15 is closed.

[0048] Furthermore, the control circuit of this embodiment also includes a second normally closed switch 18 and a third normally closed switch 19. The second normally closed switch 18 is connected in series with the power supply 7, the first contact of the first double-control switch 8, the first contact of the second double-control switch 9, and the discharge motor 3. The third normally closed switch 19 is connected in series with the power supply 7, the second contact of the first double-control switch 8, the second contact of the second double-control switch 9, and the discharge motor 3. Correspondingly, an insulating pressure rod 20 is connected to one end of the discharge valve 4 of this embodiment. When the discharge motor 3 drives the discharge valve 4 to move to connect the sand discharge hole with the sand outlet, the insulating pressure rod 20 abuts the second normally closed switch 18, causing the second normally closed switch 18 to open. When the discharge motor 3 drives the discharge valve 4 to close the sand outlet, the insulating pressure rod 20 abuts the third normally closed switch 19, causing the third normally closed switch 19 to open.

[0049] Furthermore, in this embodiment, the levers of the first and second dual-control switches 8 and 9 are both arranged vertically. When the levers are connected to the contacts, the levers are arranged at an angle. The first and third electromagnets 10 and 12 are respectively mounted on either side of the first dual-control switch 8; the second and fourth electromagnets 11 and 13 are respectively mounted on either side of the second dual-control switch 9.

[0050] Furthermore, the automatic controlled feeding system for flowable materials of this embodiment also includes a bracket 21, a conveyor motor 22, and a conveyor belt 23. The conveyor belt 23 is mounted on the bracket 21. The conveyor motor 22 is in transmission connection with the conveyor belt 23. A pulley is mounted on the rotating shaft of the conveyor motor 22, and the conveyor belt 23 includes two rotating shafts and a flat belt wound around the two rotating shafts. The pulley is in transmission connection with one of the rotating shafts of the conveyor belt 23 via a belt, enabling the conveyor motor 22 to drive the conveyor belt 23. The material receiving frame 2 includes a top plate 24, two side plates 25, and a hopper 26. The top plate 24 is horizontally arranged above the conveyor belt 23. The side plates 25 are fixedly mounted on either side of the top plate 24, with the lower edges of the side plates 25 abutting the upper surface of the conveyor belt 23. The hopper 26 is fixedly mounted above the top plate 24 and communicates with the space below the top plate 24. Material enters the material receiving frame 2 through the hopper 26, then falls onto the conveyor belt 23 and is conveyed out.

[0051] Furthermore, the power supply 7 of the control circuit of this embodiment is connected in series with the conveyor motor 22 via a sliding rheostat 27, allowing the speed of the conveyor motor 22 to be adjusted to meet different production requirements. A master switch 28 is also connected in series with the power supply 7 of the control circuit. This master switch 28 is used to control the on / off of the entire circuit, facilitating operation and maintenance.

[0052] The overall control principle of this embodiment is:

[0053] When the material in the receiving frame 2 is reduced to the bottom of the receiving frame 2, the two laser lamps 5 illuminate the corresponding optical signal board. At this time, the two photoelectric panels 6 generate electricity, and the first control electromagnet 16 and the second control electromagnet 17 generate magnetic force, so that the first normally closed switch 14 is disconnected and the first normally open switch 15 is closed. At this time, the circuit of the power supply 7, the first normally closed switch 14, the third electromagnet 12, and the fourth electromagnet 13 connected in series has no electricity; while the circuit of the power supply 7, the first normally open switch 15, the first electromagnet 10, and the second electromagnet 11 connected in series is electrically conductive. The first electromagnet 10 and the second electromagnet 11 respectively adsorb the levers of the first double-control switch 8 and the second double-control switch 9 and are respectively placed on the first contact of the first double-control switch 8 and the first contact of the second double-control switch 9; thereby, the circuit in series of the power supply 7, the first contact of the first double-control switch 8, the first contact of the second double-control switch 9, the discharge motor 3, and the second normally closed switch 18 is electrically connected, and the discharge motor 3 rotates forward to drive the discharge valve 4 to move to the sand discharge hole to be connected with the sand outlet. At this time, the flowing material in the feeding bin 1 flows into the receiving frame 2.

[0054] When a certain amount of material is added, causing the laser light 5 below to be unable to illuminate the photoelectric panel 6, the second control electromagnet 17 loses power, causing the first normally open switch 15 to be disconnected. The circuit connected in series by the power supply 7, the first normally open switch 15, the first electromagnet 10, and the second electromagnet 11 loses power and is disconnected. The first electromagnet 10 and the second electromagnet 11 lose their attraction to the levers of the first double-control switch 8 and the second double-control switch 9. However, since the lever is tilted when connected to the contact, the lever still maintains contact with the contact under the action of its own weight. Then, the circuit connected in series by the power supply 7, the first contact of the first double-control switch 8, the first contact of the second double-control switch 9, the discharging motor 3, and the second normally closed switch 18 remains in an electrically conductive state, and the discharging motor 3 rotates forward to drive the discharging valve 4 to continue moving until the discharging valve 4 moves to the sand discharge hole and is connected to the sand outlet. At this time, the insulating pressure rod 20 connected to one end of the discharging valve 4 abuts against the second normally closed switch 18 to disconnect the second normally closed switch 18, thereby disconnecting the circuit connected in series by the power supply 7, the first contact of the first double-control switch 8, the first contact of the second double-control switch 9, the discharging motor 3, and the second normally closed switch 18, and losing power. The discharging motor 3 stops rotating, and the discharging valve 4 moves into place.

[0055] When a certain amount of material is added, causing the laser light 5 above to irradiate the photoelectric panel 6, the first control electromagnet 16 loses power, causing the first normally closed switch 14 to close. At this time, the circuit of the power supply 7, the first normally closed switch 14, the third electromagnet 12, and the fourth electromagnet 13 in series is closed, and the third electromagnet 12 and the fourth electromagnet 13 respectively attract the levers of the first double-control switch 8 and the second double-control switch 9 and place them on the second contact of the first double-control switch 8 and the second contact of the second double-control switch 9; thereby, the power supply 7, the second contact of the first double-control switch 8, The circuit connected in series by the second contact of the second double-control switch 9, the discharging motor 3, and the third normally closed switch 19 is energized and turned on, and the discharging motor 3 rotates in the opposite direction to drive the discharging valve 4 to move to close the sand outlet. At this time, the insulating pressure rod 20 connected to one end of the discharging valve 4 abuts against the third normally closed switch 19 to disconnect the third normally closed switch 19, thereby disconnecting the circuit connected in series by the power supply 7, the second contact of the first double-control switch 8, the second contact of the second double-control switch 9, the discharging motor 3, and the third normally closed switch 19, and losing power. The discharging motor 3 stops rotating, and the discharging valve 4 moves into place.

[0056] Then, when the material in the receiving frame 2 is reduced to the bottom of the receiving frame 2 again so that both laser lamps 5 illuminate the corresponding optical signal plates, the material will be added again, and the cycle will be repeated to ensure the continuous supply of materials.

[0057] Example 2

[0058] As another embodiment of the present invention, unlike the previous embodiment, the control circuit of this embodiment includes a power supply 7 and a single-chip microcomputer controller, which is electrically connected to the power supply 7, the optical signal board, and the discharge motor 3. The control circuit composed of the power supply 7 and the single-chip microcomputer controller can precisely control the discharge motor 3 based on the signal feedback from the optical signal board, thereby driving the discharge valve 4 to move, connecting the sand discharge hole to the sand outlet or closing the sand outlet, and realizing automatic control of material addition or cessation.

[0059] Compared with the prior art, the present invention has the following beneficial effects:

[0060] The automatic control feeding system of flowable materials of the present application can use the laser lamp 5 and the optical signal board to respond to the material status in the material receiving frame 2. According to the detection results, the control circuit controls the discharge motor 3 to drive the discharge valve 4, so as to realize the automatic feeding and stopping of flowable materials from the feeding bin 1 through the sand outlet and the sand discharge hole to the material receiving frame 2. The feeding action can be automatically adjusted according to the real-time stacking status of the material in the material receiving frame 2, avoiding the uncertainty of manual operation and eliminating the need for manual monitoring and adjustment. It can effectively adapt to changes in material status and dynamic needs in the actual production process, and prevent over- or under-feeding.

[0061] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0062] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An automatic control feeding system for flowable materials, characterized by: It includes a feeding bin, a material receiving frame, a discharge motor, a discharge valve and a controller. A sand outlet is formed at the bottom of the feeding bin; The discharge motor is fixedly arranged on the outside of the silo wall of the feeding silo, a driving wheel is installed on the driving shaft of the discharge motor, the discharge valve is slidably installed on the bottom of the feeding silo, a sand discharge hole is opened on the discharge valve, the discharge valve is in transmission connection with the driving wheel, and the discharge valve can slide under the drive of the driving wheel; The material receiving frame is located below the sand outlet, and the lower side of the material receiving frame is open; The controller is electrically connected to the discharge motor, and includes two laser lamps, two optical signal boards, and a control circuit. The two laser lamps are sequentially arranged on the material receiving frame from top to bottom, and the light emitted by the laser lamps penetrates the material receiving frame. The two optical signal boards are respectively arranged opposite to the two laser lamps; the control circuit is electrically connected to the laser lamps, the optical signal boards, and the discharge motor; When the two laser lights illuminate the corresponding optical signal plates, the control circuit controls the discharge motor to drive the discharge valve to move to the sand discharge hole to communicate with the sand outlet; When the two laser lamps cannot illuminate the corresponding optical signal board, the control circuit controls the discharge motor to drive the discharge valve to move to close the sand outlet.

2. The automatic controlled feeding system for flowable materials according to claim 1, characterized in that: The control circuit includes a power supply and a single-chip microcomputer controller, and the single-chip microcomputer controller is electrically connected to the power supply, the optical signal board and the discharge motor.

3. The automatic controlled feeding system for flowable materials according to claim 1, characterized in that: The control circuit includes a power supply, a first double-control switch, a second double-control switch, a first electromagnet, a second electromagnet, a third electromagnet, a fourth electromagnet, a first normally closed switch, a first normally open switch, a first control electromagnet and a second control electromagnet; wherein The power supply, the first normally closed switch, the third electromagnet, and the fourth electromagnet are connected in series; The power supply, the first normally open switch, the first electromagnet, and the second electromagnet are connected in series; The power supply, the first contact of the first double-control switch, the first contact of the second double-control switch, and the discharge motor are connected in series; The power supply, the second contact of the first double-control switch, the second contact of the second double-control switch, and the discharge motor are connected in series; The optical signal board is a photoelectric board, one of the photoelectric boards is connected in series with the first control electromagnet, the first control electromagnet is arranged opposite to the first normally closed switch, and when the first control electromagnet is energized, the first normally closed switch is opened; Another photoelectric panel is connected in series with the second control electromagnet, and the second control electromagnet is arranged opposite to the first normally open switch. When the second control electromagnet is energized, the first normally open switch is closed.

4. The automatic controlled feeding system for flowable materials according to claim 3, characterized in that: The control circuit further includes a second normally closed switch and a third normally closed switch; the second normally closed switch is connected in series with the power supply, the first contact of the first double-control switch, the first contact of the second double-control switch, and the discharging motor; the third normally closed switch is connected in series with the power supply, the second contact of the first double-control switch, the second contact of the second double-control switch, and the discharging motor; An insulating pressure rod is connected to one end of the discharge valve. When the discharge motor drives the discharge valve to move to the sand discharge hole and connect with the sand outlet, the insulating pressure rod abuts the second normally closed switch to disconnect the second normally closed switch; when the discharge motor drives the discharge valve to move to close the sand outlet, the insulating pressure rod abuts the third normally closed switch to disconnect the third normally closed switch.

5. The automatic controlled feeding system for flowable materials according to claim 3, characterized in that: The levers of the first double-control switch and the second double-control switch are both arranged vertically. When the levers are connected to the contacts, the levers are arranged tilted.

6. The automatic controlled feeding system for flowable materials according to claim 5, characterized in that: The first electromagnet and the third electromagnet are respectively installed on both sides of the first double-control switch; the second electromagnet and the fourth electromagnet are respectively installed on both sides of the second double-control switch.

7. The automatic control feeding system for flowable materials according to any one of claims 1 to 6, characterized in that: It also includes a bracket, a conveying motor and a conveyor belt; the conveyor belt is installed on the bracket; the conveying motor is in driving connection with the conveyor belt; The material receiving frame includes a top plate, two side plates and a funnel. The top plate is horizontally arranged above the conveyor belt. The two side plates are fixedly installed on both sides of the top plate, and the lower edges of the two side plates are in contact with the upper surface of the conveyor belt. The funnel is fixedly installed above the top plate and is connected to the space below the top plate.

8. The automatic controlled feeding system for flowable materials according to claim 7, characterized in that: The power supply of the control circuit is connected in series with the conveying motor via a sliding rheostat.

9. The automatic controlled feeding system for flowable materials according to claim 7, characterized in that: A pulley is installed on the rotating shaft of the conveying motor, and the conveyor belt includes two rotating shafts and a flat belt arranged on the two rotating shafts; the pulley is connected to one of the rotating shafts of the conveyor belt through a belt.

10. The automatic controlled feeding system for flowable materials according to any one of claims 1 to 6, characterized in that: The power supply of the control circuit is connected in series with a master control switch, and the master control switch is used to control the on and off of the entire circuit.

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