Sand adding machine for water tank test

Abstract

The invention relates to the technical field of water tank tests, in particular to a water tank test sand adding machine which comprises a sand adding mechanism, a conveying mechanism, a controller and a sand suction mechanism, the sand adding mechanism is provided with a sand adding bin, a sand discharging motor, a sand discharging valve and the like, and the conveying mechanism is provided with a sand receiving frame, a support, a conveying motor, a conveying belt and the like. The controller controls the sand discharging motor to work through the laser lamp and the optical signal plate, and the sand suction mechanism can suck sand into the sand adding bin. Meanwhile, the sand adding mechanism is further provided with an acoustic range finder and a meter, the sand receiving frame is composed of a top plate, two side plates and a funnel, and the control circuit is provided with a plurality of switches, electromagnets and the like. According to the sand adding device, automatic control over water tank test sand adding is achieved, the sand discharging valve can be automatically opened or closed according to the condition of sand in the sand receiving frame, the sand adding amount can be accurately metered, sand can be supplemented through the sand suction mechanism, and the experiment efficiency and accuracy are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of water tank testing, and in particular to a water tank testing sand adding machine. Background Art

[0002] Flume tests related to sediment transport often require adding sand to the flume inlet at a constant rate. Traditionally, the tester first manually stirs the test sand with a shovel. Once the sand is roughly evenly mixed, the tester then adds a certain amount of sand to the flume inlet at regular intervals using tools such as a shovel, bucket, stopwatch, and electronic scale. This approach has many drawbacks, such as:

[0003] The practice of adding a certain mass of test sand at regular intervals does not inherently result in a constant rate of addition. Instead, the sand is added in concentrated increments at regular intervals, with the average rate during these intervals equal to the designed rate. This intermittent addition process disrupts the continuity of the test and, in turn, affects the accuracy of the results. Traditional additions require the tester to remain on duty for extended periods, adding sand in concentrated increments at regular intervals, which is physically demanding. This approach, when fatigued, is prone to operational errors and is highly inaccurate. Summary of the Invention

[0004] In view of the defects existing in the prior art, the purpose of the present invention is to provide a water tank test sand adding machine, which can realize automatic and continuous sand adding during the water tank test process, greatly reducing the manual operation links, greatly improving the stability and accuracy of sand adding, and overcoming the inherent defects of traditional practices such as low efficiency, large errors and high labor intensity to the greatest extent.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0006] A water tank test sand adding machine includes a sand adding mechanism, a transmission mechanism and a controller, wherein

[0007] The sand-feeding mechanism includes a sand-feeding bin, a sand-discharging motor, and a sand-discharging valve. A sand-feeding port is formed on the upper wall of the sand-feeding bin, and a sand-discharging port is formed on the bottom of the sand-feeding bin. The sand-discharging motor is fixedly arranged on the exterior of the bin wall of the sand-feeding bin, and a driving wheel is installed on the driving shaft of the sand-discharging motor. The sand-discharging valve is slidably mounted on the bottom of the sand-feeding bin, and a sand-discharging hole is formed on the sand-discharging valve. The sand-discharging valve is in driving connection with the driving wheel.

[0008] The conveying mechanism includes a sand receiving frame, 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 sand receiving frame is located below the sand outlet;

[0009] The controller is electrically connected to the sand removal motor, and includes two laser lamps, two optical signal boards, and a control circuit. The two laser lamps are sequentially arranged on the sand receiving frame from top to bottom, and the optical fibers emitted by the laser lamps penetrate the sand 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 sand removal motor;

[0010] When the two laser lights illuminate the corresponding optical signal board, the control circuit controls the sand discharge motor to drive the sand discharge valve to move to the sand discharge hole to communicate with the sand outlet;

[0011] When the two laser lights cannot illuminate the corresponding optical signal board, the control circuit controls the sand discharge motor to drive the sand discharge valve to move to close the sand outlet.

[0012] Optionally, the water tank test sand-adding machine also includes a sand suction mechanism, which includes an air pump, a stirring bin, a stirring motor, a stirring impeller, a sand-adding valve and a suction pipe; the stirring bin is fixedly arranged, and a vent and a sand suction port are provided at the upper end of the stirring bin, and a drop-out port is provided at the bottom of the stirring bin, and the drop-out port is connected to the sand-adding bin; the air pump is fixedly arranged, and the air inlet of the air pump is sealedly connected to the vent; one end of the suction pipe is sealedly connected to the sand-adding port; the stirring motor is fixedly arranged on the stirring bin; the stirring impeller is arranged inside the stirring bin, and the stirring impeller is coaxially connected to the rotating shaft of the stirring motor; the sand-adding valve is slidably installed at the bottom of the stirring bin, and a sand-adding hole is provided on the sand-adding valve, and the sand-adding valve can be operably moved to close the drop-out port or moved to a point where the sand-adding hole is connected to the drop-out port.

[0013] Optionally, the sand-gauging mechanism further includes an acoustic rangefinder and a meter; the sand-gauging bin is fixedly connected to the meter; the meter is fixedly set, and the meter is used to measure the mass of the sand-gauging bin and the sediment; there are multiple acoustic rangefinders, and the multiple acoustic rangefinders are all installed on the inner top of the sand-gauging bin.

[0014] Optionally, the sand 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 abutted against 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.

[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] The power supply, the first normally open switch, the first electromagnet, and the 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 sand 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 sand discharge motor are connected in series;

[0020] 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;

[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 sand 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 sand discharge motor;

[0023] An insulating pressure rod is connected to one end of the sand discharge valve. When the sand discharge motor drives the sand discharge valve to move to the sand discharge hole to be connected to the sand outlet, the insulating pressure rod abuts the second normally closed switch to disconnect the second normally closed switch; when the sand discharge motor drives the sand 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 sand suction mechanism further includes a filter screen, which is installed at the connection between the air inlet of the air pump and the vent.

[0027] Optionally, the power supply of the control circuit is connected in series with the conveying motor through a sliding rheostat.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The water tank test sand adding machine of the present application is detachably connected to the bearing seat of the working roller through a fixed rod, and utilizes the hooking relationship between the fixed hook and the movable ring. Driven by the linear motion output of the power element, the fixed hook is used to support the fixed rod, which can effectively and quickly assist workers to push the old working roller out of the flat head sleeve. After the new working roller is connected to the fixed rod, the movable ring is hooked with the fixed hook, and the new working roller can be pulled into the frame, thereby significantly reducing the roller changing time, greatly improving production efficiency, and avoiding quality defects and reduced production efficiency caused by problems such as difficult operation, low work efficiency, and difficulty in pushing out the old roller and difficulty in putting the new roller in place during manual roller changing. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] 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.

[0031] Figure 1 It is a schematic diagram of the overall structure of the water tank test sand adding machine of the present invention;

[0032] 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;

[0033] 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;

[0034] 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 sand discharge motor are connected in series;

[0035] Figure 5 for Figure 1 Circuit diagram of the power supply, the second contact of the first double-control switch, the second contact of the second double-control switch, and the sand discharge motor connected in series.

[0036] In the figure: 1. Sand charging bin; 2. Sonic rangefinder; 3. Meter; 4. Sand charging port; 5. Sand outlet; 6. Sand discharge motor; 7. Sand discharge valve; 8. Fixed support; 9. Air pump; 10. Mixing bin; 11. Mixing motor; 12. Mixing impeller; 13. Sand charging valve; 14. Suction pipe; 15. Dropping port; 16. Filter; 17. Sand charging pipe; 18. Display; 19. Sand receiving frame; 20. Bracket; 21. Conveyor motor; 22. Conveyor belt; 23. Top plate; 24. Side plate; 2 5. Funnel; 26. Laser light; 27. Photoelectric panel; 28. Power supply; 29. First double-control switch; 30. Second double-control switch; 31. First electromagnet; 32. Second electromagnet; 33. Third electromagnet; 34. Fourth electromagnet; 35. First normally closed switch; 36. First normally open switch; 37. First control electromagnet; 38. Second control electromagnet; 39. Second normally closed switch; 40. Third normally closed switch; 41. Insulating pressure rod; 42. Sliding rheostat; 43. Master control switch. DETAILED DESCRIPTION

[0037] 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.

[0038] Example 1

[0039] Combine Figures 1 to 5 As shown, an embodiment of the present invention discloses a sand-feeding machine for a water flume test, comprising a sand suction mechanism, a sand-feeding mechanism, a conveying mechanism, and a controller. The sand suction mechanism draws in sand, the sand-feeding mechanism stores and mixes the sand, and the conveying mechanism receives and conveys the sand that falls from the sand-feeding mechanism. The controller controls the actions of the sand suction, sand-feeding, and conveying mechanisms to achieve precise sand transport.

[0040] Specifically, the sand suction mechanism of this embodiment includes an air pump 9, a mixing chamber 10, a mixing motor 11, an impeller 12, a sand-feeding valve 13, and a suction pipe 14. The mixing chamber 10 is fixed, with a vent and a sand-feeding port defined at its top. A discharge port 15 is defined at its bottom, connecting to the sand-feeding port 4. The air pump 9 is fixed, with its air inlet sealed to the vent. One end of the suction pipe 14 is sealed to the sand-feeding port. The mixing motor 11 is fixed to the mixing chamber 10. The impeller 12 is located within the mixing chamber 10 and coaxially connected to the rotating shaft of the mixing motor 11, which provides power to the impeller 12. The impeller 12 typically consists of blades and a hub. The blades can be spiral or straight. Spiral blades offer excellent mixing performance and ensure more uniform mixing of sediment. Straight blades are simple in structure and easy to manufacture. The stirring impeller 12 rotates under the drive of the stirring motor 11, stirring the sediment in the stirring bin 10 to make the sediment density uniform and facilitate subsequent transportation. The sand-adding valve 13 is slidably installed at the bottom of the stirring bin 10. The sand-adding valve 13 is provided with a sand-adding hole. The sand-adding valve 13 can be operatively moved to close the discharge port 15 or to connect the sand-adding hole to the discharge port 15. The movement of the sand-adding valve 15 can be manually operated or automatically controlled by an electric push rod or other device. The sand suction mechanism uses the air pump 9, the suction pipe 14 and the stirring bin 10 to suck the sediment into the stirring bin 10. The stirring motor 11 drives the stirring impeller 12 to stir the sediment to make it uniform. The sand-adding valve 13 can control the opening and closing of the discharge port 15 to facilitate the adjustment of the sediment flow rate.

[0041] Furthermore, the sand suction mechanism of this embodiment further includes a filter screen 16, which is installed at the connection between the air inlet and the vent of the air pump 9. The filter screen 16 is installed at the connection between the air inlet and the vent of the air pump 9 to prevent mud and sand from entering the air pump 9, thereby avoiding damage to the air pump 9 and ensuring the normal operation of the sand suction mechanism.

[0042] Furthermore, the sand-feeding mechanism of this embodiment includes a sand-feeding bin 1, an acoustic rangefinder 2, and a meter 3. A sand-feeding port 4 is formed on the upper wall of the bin 1, and a sand-discharging port 5 is formed on the bottom of the bin 1. The sand-discharging port 5 and the sand-feeding port 4 can have various shapes, such as circular or square. Generally, circular openings are more common. The sand-feeding port 4 facilitates the uniform flow of sand into the bin and serves to add the sand to be measured. The sand-discharging port 5 facilitates the uniform discharge of sand. The sand-feeding port 4 is connected to the material discharge port 15.

[0043] The meter 3 is fixedly mounted, and the sand bin 1 is fixedly connected to the meter 3. The sand bin 1 and meter 3 are secured together by welding, bolting, or other means to ensure a stable relative position between them during measurement, preventing factors such as shaking from affecting the mass measurement results. The meter 3 can be a weighing device such as an electronic scale or a pounding scale. Selecting a meter 3 with appropriate precision ensures the accuracy of the mass measurement. In this embodiment, the meter 3 is used to measure the mass of the sand bin 1 and the sediment. In this embodiment, the meter 3 is a hanging scale, the hanging member of which is fixedly connected to the top of the sand bin 1, and the hanging member is a hanging rope. The mass change measured by the meter 3 can be directly determined as the actual mass of the sediment entering the sand bin 1. Of course, in other embodiments, the hanging member can be a hook. Furthermore, in other embodiments, the meter 3 is a flat scale, and the sand bin 1 can be fixedly mounted on the flat scale.

[0044] Furthermore, the present embodiment includes multiple acoustic rangefinders 2, all of which are mounted on the inner top of the sand storage bin 1. These multiple acoustic rangefinders 2 are mounted on the inner top of the sand storage bin 1 by gluing, screwing, or other methods to ensure secure mounting and enable normal transmission and reception of acoustic signals. The acoustic rangefinders 2 can be of different types, such as ultrasonic rangefinders 2 or infrasonic rangefinders 2. These multiple acoustic rangefinders 2 can measure the distance from the surface of the sediment inside the bin to the bin top from different locations, thereby determining the volume of the sediment. The multiple acoustic rangefinders 2 face different directions, allowing their measurement range to fully cover the interior of the sand storage bin 1. When the interior space of the sand storage bin 1 remains unchanged, the distances between the multiple acoustic rangefinders 2 and the inner wall of the sand storage bin 1 remain constant. When sediment enters, the distances between the multiple acoustic rangefinders 2 change, enabling the measurement of the sediment's height. Based on the dimensions of the inner wall of the sand storage bin 1, the sediment's volume can be estimated. The meter 3 accurately measures the mass, and the sonic rangefinder 2 accurately measures the volume, and the average density of the sediment can be accurately calculated based on the formula that density equals mass divided by volume.

[0045] Furthermore, the sand-feeding mechanism of this embodiment further includes a sand-discharging motor 6 and a sand-discharging valve 7. The sand-discharging motor 6 is fixedly mounted on the exterior of the sand-feeding bin 1 and can be fixed with a bracket or directly welded to the bin wall. A drive wheel is mounted on the drive shaft of the sand-discharging motor 6. The drive wheel can be a gear, a pulley, or the like, and in this embodiment is a gear.

[0046] A sand discharge valve 7 is slidably mounted on the bottom of the sand filling bin 1. It is provided with a sand discharge hole, the shape and size of which are adapted to the sand outlet 5. The sand discharge valve 7 is elongated, with a rack formed at one end. The rack meshes with the drive wheel for transmission connection. Driven by the drive wheel, the sand discharge valve 7 slides on a specially designed guide rail. The sand discharge valve 7 can be operatively moved to close the sand outlet 5 or to connect the sand discharge hole with the sand outlet 5. Specifically, when sand discharge is required, the sand discharge valve 7 slides under the drive wheel, connecting the sand discharge hole with the sand outlet 5. When sand discharge is not required, the sand discharge valve 7 slides to close the sand outlet 5. The arrangement of the sand discharge motor 6, sand discharge valve 7, drive wheel, and sand outlet 5 in this embodiment allows the sand discharge valve 7 to slide under the drive wheel, operatively closing or connecting the sand outlet 5, facilitating controlled sand discharge and subsequent operations and repeated measurements. It is easy to understand that in other embodiments, the driving wheel is a pulley, and both ends of the sand discharge valve 7 are connected to the driving wheel through a transmission belt, and the driving wheel drives the bidirectional movement of the sand discharge valve 7 through forward and reverse rotation.

[0047] Furthermore, the sand filling mechanism of this embodiment also includes a fixed support 8, which is disposed outside the sand filling bin 1, with the sand filling bin 1 and the fixed support 8 spaced apart. The placement of the fixed support 8 outside the sand filling bin 1 and the space between them ensures that the sand filling bin 1 operates normally without interference, while also providing support and protection, thereby reducing the risk of damage to the device from external impacts and other factors. When sand is added, the fixed support 8 prevents the sand filling bin 1 from shaking violently. After the sand is completely filled, the space between the sand filling bin 1 and the fixed support 8 ensures that the quality of the sand filling bin 1 is not affected by external factors, thus ensuring measurement accuracy.

[0048] Furthermore, in this embodiment, a sand feeding pipe 17 is formed at the sand feeding port 4 of the sand feeding bin 1. One end of the sand feeding pipe is sealedly connected to the sand feeding port 4, and the other end of the sand feeding pipe is located directly below the discharge port 15. The provision of the sand feeding pipe 17 at the sand feeding port 4 of the sand feeding bin 1, with one end sealedly connected to the sand feeding port 4 and the other end located directly below the discharge port 15, ensures that the sediment falling from the discharge port 15 of the mixing bin 10 accurately enters the sand feeding bin 1, preventing sediment from spilling, and improving measurement efficiency and accuracy.

[0049] Furthermore, the conveyor mechanism of this embodiment includes a sand receiving frame 19, a bracket 20, a conveyor motor 21, and a conveyor belt 22. The sand receiving frame 19 is located directly below the sand outlet 5. The conveyor belt 22 is mounted on the bracket 20, which supports the conveyor belt 22 and is generally constructed from welded metal profiles. The bracket 20 can be adjusted in height and angle as needed to accommodate different conveying requirements. The conveyor motor 21 is in driving connection with the conveyor belt 22. A pulley is mounted on the rotating shaft of the conveyor motor 21. The conveyor belt 22 includes two rotating shafts and a flat belt wrapped around the two shafts. The pulley is in driving connection with one of the rotating shafts of the conveyor belt 22 via a belt. The sand receiving frame 19 is located below the material discharge port. The sand receiving frame 19 includes a top plate 23, two side plates 24 and a funnel 25. The top plate 23 is horizontally arranged above the conveyor belt 22. The two side plates 24 are fixedly installed on both sides of the top plate 23. The lower edges of the two side plates 24 abut against the upper surface of the conveyor belt 22, which can prevent mud and sand from overflowing from both sides; the funnel 25 is fixedly installed above the top plate 23 and is connected to the space below the top plate 23. The shape of the funnel 25 is generally conical, which is convenient for guiding mud and sand to flow into the conveyor belt 22 below the sand receiving frame 19.

[0050] Furthermore, the water tank test sand adding machine of this embodiment also includes a computer and a display 18. The computer is electrically connected to the meter 3 and multiple acoustic rangefinders 2. The computer is used to calculate the average density of sediment based on the data measured by the meter 3 and multiple acoustic rangefinders 2. The display 18 is electrically connected to the computer and is used to display the average density of sediment. The computer and display 18 can realize automated data processing and result display of the sediment average density measuring device. The computer automatically calculates the average density of sediment based on the data measured by the meter 3 and the acoustic rangefinder 2, and then the display 18 intuitively displays the density value. The addition of the computer and display 18 makes the calculation and display of measurement results more automated and intuitive. The computer quickly and accurately calculates the average density of sediment based on the measurement data, and the display 18 displays the results in real time, reducing the errors caused by manual calculation and recording, and improving measurement efficiency and accuracy.

[0051] The air pump 9 of the sand suction mechanism of the present application cooperates with the mixing bin 10, and the sand suction function is realized by using the suction tube 14. The stirring motor 11 drives the stirring impeller 12 to stir the sediment in the mixing bin 10 to avoid sediment accumulation and blockage, and at the same time make the sediment evenly distributed. The sand adding valve 13 can control the opening and closing of the drop port 15 to realize quantitative sand dropping; the sand receiving frame 19 of the conveying mechanism receives the sediment falling from the drop port, and the side plates 24 abut against the surface of the conveyor belt 22 to prevent the sediment from overflowing, and the cross-sectional size formed by the top plate 23, the side plates 24 and the surface of the conveyor belt 22 is always fixed. After the sediment is evenly stirred, the speed of the conveyor belt 22 is controlled to be constant, so that the amount of sediment passing through the cross-sectional area formed by the top plate 23, the side plates 24 and the surface of the conveyor belt 22 per unit time is always consistent. The conveyor belt 22 is driven by the conveying motor 21 to transport the sediment to the specified position, thereby realizing the quantitative transportation of sediment as a whole.

[0052] Furthermore, the controller of this embodiment is electrically connected to the sand discharge motor. The controller includes two laser lamps 26, two optical signal boards and a control circuit. The two laser lamps 26 are arranged on the sand connection frame from top to bottom. The optical fiber emitted by the laser lamps 26 penetrates the sand connection frame. The two optical signal boards are respectively arranged opposite to the two laser lamps 26. It is worth noting that in actual use, due to the limitation of installation space, an optical fiber tube can be installed between the laser lamp 26 and the optical signal board, and the light energy of the laser lamp 26 is irradiated to the optical signal board through the conduction effect of the optical fiber tube.

[0053] The control circuit of this embodiment is electrically connected to the laser lights 26, the optical signal board, and the sand discharge motor. When both laser lights 26 illuminate the corresponding optical signal board, indicating that there is less material in the sand receiving frame, the control circuit controls the sand discharge motor to drive the sand discharge valve to move until the sand discharge hole is connected to the sand outlet, and material flows from the average density measurement chamber into the sand receiving frame. When neither laser light 26 illuminates the corresponding optical signal board, indicating that there is more material in the sand receiving frame, the control circuit controls the sand discharge motor to drive the sand discharge valve to move to close the sand outlet, stopping material feeding. The controller controls the operation of the sand discharge motor based on the material accumulation status in the sand receiving frame, achieving the effect of automatically adjusting the feeding action according to the real-time material accumulation status, adapting to changes in material status 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 status and timely control the opening and closing of the sand discharge valve.

[0054] Furthermore, the control circuit of this embodiment includes a power supply 28, a first double-control switch 29, a second double-control switch 30, a first electromagnet 31, a second electromagnet 32, a third electromagnet 33, a fourth electromagnet 34, a first normally closed switch 35, a first normally open switch 36, a first control electromagnet 37 and a second control electromagnet 38; Figure 2 As shown, the power supply 28, the first normally closed switch 35, the third electromagnet 33, and the fourth electromagnet 34 are connected in series; Figure 3 As shown, the power supply 28, the first normally open switch 36, the first electromagnet 31, and the second electromagnet 32 are connected in series; Figure 4 As shown, the power supply 28, the first contact of the first double-control switch 29, the first contact of the second double-control switch 30, and the sand discharge motor are connected in series; Figure 5 As shown, the power supply 28, the second contact of the first double-control switch 29, the second contact of the second double-control switch 30, and the sand discharge motor are connected in series.

[0055] It is worth noting that the optical signal board in this embodiment is a photoelectric board 27. One photoelectric board 27 is connected in series with a first control electromagnet 37. The first control electromagnet 37 is arranged opposite to the first normally closed switch 35. When the first control electromagnet 37 is energized, the first normally closed switch 35 is opened; the other photoelectric board 27 is connected in series with a second control electromagnet 38. The second control electromagnet 38 is arranged opposite to the first normally open switch 36. When the second control electromagnet 38 is energized, the first normally open switch 36 is closed.

[0056] Furthermore, the control circuit of this embodiment also includes a second normally closed switch 39 and a third normally closed switch 40. The second normally closed switch 39 is connected in series with the power supply 28, the first contact of the first double-control switch 29, the first contact of the second double-control switch 30, and the sand discharge motor. The third normally closed switch 40 is connected in series with the power supply 28, the second contact of the first double-control switch 29, the second contact of the second double-control switch 30, and the sand discharge motor. Accordingly, an insulating pressure rod 41 is connected to one end of the sand discharge valve of this embodiment. When the sand discharge motor drives the sand discharge valve to connect the sand discharge hole with the sand outlet, the insulating pressure rod 41 abuts the second normally closed switch 39, causing the second normally closed switch 39 to open. When the sand discharge motor drives the sand discharge valve to close the sand outlet, the insulating pressure rod 41 abuts the third normally closed switch 40, causing the third normally closed switch 40 to open.

[0057] Furthermore, in this embodiment, the levers of the first and second dual-control switches 29 and 30 are both arranged vertically. When the levers are connected to the contacts, the levers are tilted. The first and third electromagnets 31 and 33 are respectively mounted on either side of the first dual-control switch 29; the second and fourth electromagnets 32 and 34 are respectively mounted on either side of the second dual-control switch 30.

[0058] Furthermore, the power supply 28 of the control circuit in this embodiment is connected in series with the conveyor motor via a sliding rheostat 42, allowing the conveyor motor's speed to be adjusted to suit different production requirements. A master switch 43 is also connected in series with the power supply 28 of the control circuit. This master switch 43 is used to control the on / off state of the entire circuit, facilitating operation and maintenance.

[0059] The overall control principle of this embodiment is:

[0060] When the material in the sand receiving frame is reduced to the bottom of the sand receiving frame, the two laser lights 26 are irradiated to the corresponding light signal board, and the two photoelectric panels 27 are both powered. The first control electromagnet 37 and the second control electromagnet 38 are both powered, so that the first normally closed switch 35 is disconnected and the first normally open switch 36 is closed. At this time, the circuit in which the power supply 28, the first normally closed switch 35, the third electromagnet 33 and the fourth electromagnet 34 are connected in series has no electricity; while the circuit in which the power supply 28, the first normally open switch 36, the first electromagnet 31 and the second electromagnet 32 are connected in series has electricity. The electromagnet 31 and the second electromagnet 32 respectively attract the levers of the first double-control switch 29 and the second double-control switch 30 and are respectively placed on the first contact of the first double-control switch 29 and the first contact of the second double-control switch 30; thereby, the circuit in series of the power supply 28, the first contact of the first double-control switch 29, the first contact of the second double-control switch 30, the sand discharge motor, and the second normally closed switch 39 is electrically connected, and the sand discharge motor rotates forward to drive the sand discharge valve to move to the sand discharge hole to be connected with the sand outlet. At this time, the flowing material in the average density measuring chamber flows into the sand receiving frame.

[0061] When a certain amount of material is added, causing the laser light 26 below to be unable to illuminate the photoelectric panel 27, the second control electromagnet 38 loses power, causing the first normally-open switch 36 to be disconnected. The circuit connected in series by the power supply 28, the first normally-open switch 36, the first electromagnet 31, and the second electromagnet 32 loses power and is disconnected. The first electromagnet 31 and the second electromagnet 32 lose their attraction to the levers of the first double-control switch 29 and the second double-control switch 30. 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 28, the first contact of the first double-control switch 29, the first contact of the second double-control switch 30, the sand discharge motor, and the second normally closed switch 39 remains electrically conductive, and the sand discharge motor rotates forward to drive the sand discharge valve to continue moving until the sand discharge valve moves to the sand discharge hole and is connected to the sand outlet. At this time, the insulating pressure rod 41 connected to one end of the sand discharge valve abuts against the second normally closed switch 39 to disconnect the second normally closed switch 39, thereby disconnecting the circuit connected in series by the power supply 28, the first contact of the first double-control switch 29, the first contact of the second double-control switch 30, the sand discharge motor, and the second normally closed switch 39, and losing power. The sand discharge motor stops rotating, and the sand discharge valve moves into place.

[0062] When a certain amount of material is added, causing the laser light 26 above to irradiate the photoelectric panel 27, the first control electromagnet 37 loses power, causing the first normally closed switch 35 to close. At this time, the circuit in series of the power supply 28, the first normally closed switch 35, the third electromagnet 33, and the fourth electromagnet 34 is closed, and the third electromagnet 33 and the fourth electromagnet 34 respectively attract the levers of the first double-control switch 29 and the second double-control switch 30 and place them on the second contact of the first double-control switch 29 and the second contact of the second double-control switch 30; thereby, the power supply 28, the first double-control switch 29 and the first normally closed switch 35 are closed. The circuit connected in series by the second contact of the first double-control switch 29, the second contact of the second double-control switch 30, the sand discharge motor, and the third normally closed switch 40 is energized and conductive, and the sand discharge motor rotates in the opposite direction to drive the sand discharge valve to move to close the sand outlet. At this time, the insulating pressure rod 41 connected to one end of the sand discharge valve abuts against the third normally closed switch 40 to disconnect the third normally closed switch 40, thereby disconnecting the circuit connected in series by the power supply 28, the second contact of the first double-control switch 29, the second contact of the second double-control switch 30, the sand discharge motor, and the third normally closed switch 40, and losing power. The sand discharge motor stops rotating, and the sand discharge valve moves into place.

[0063] Then, when the material in the sand receiving frame is reduced to the bottom of the sand receiving frame again so that both laser lamps 26 illuminate the corresponding light signal board, the material will be added again, and the cycle will be repeated to ensure the continuous supply of materials.

[0064] In summary, the water tank test sand adding machine of this embodiment first uses an air pump to quickly load the test sand, followed by a stirring motor to achieve uniform mixing of the test sand; then measures the average density of the test sand; then, through the coordinated operation of electronically controlled valves, automatically replenishes the sand; and finally, by regulating the conveyor belt speed, continuously adds sand at a constant rate. This embodiment of the water tank test sand adding machine mechanizes the entire process of "loading - stirring - density detection - automatic and continuous sand addition," significantly reducing manual operations and greatly improving the stability and accuracy of sand addition, overcoming the inherent shortcomings of traditional methods such as low efficiency, large errors, and high labor intensity.

[0065] 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.

[0066] 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. A water tank test sand adding machine, characterized by: It includes a Gaza mechanism, a transmission mechanism and a controller, wherein The sand-feeding mechanism includes a sand-feeding bin, a sand-discharging motor, and a sand-discharging valve. A sand-feeding port is formed on the upper wall of the sand-feeding bin, and a sand-discharging port is formed on the bottom of the sand-feeding bin. The sand-discharging motor is fixedly arranged on the exterior of the bin wall of the sand-feeding bin, and a driving wheel is installed on the driving shaft of the sand-discharging motor. The sand-discharging valve is slidably mounted on the bottom of the sand-feeding bin, and a sand-discharging hole is formed on the sand-discharging valve. The sand-discharging valve is in driving connection with the driving wheel. The conveying mechanism includes a sand receiving frame, a bracket, a conveying motor and a conveyor belt; the conveyor belt is installed on the bracket; the conveying motor is in transmission connection with the conveyor belt; the sand receiving frame is located below the sand outlet; The controller is electrically connected to the sand removal motor, and includes two laser lamps, two optical signal boards, and a control circuit. The two laser lamps are sequentially arranged on the sand receiving frame from top to bottom, and the optical fibers emitted by the laser lamps penetrate the sand 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 sand removal motor; When the two laser lights illuminate the corresponding optical signal board, the control circuit controls the sand discharge motor to drive the sand discharge valve to move to the sand discharge hole to communicate with the sand outlet; When the two laser lights cannot illuminate the corresponding optical signal board, the control circuit controls the sand discharge motor to drive the sand discharge valve to move to close the sand outlet.

2. The water tank test sand adding machine according to claim 1, characterized in that: It also includes a sand suction mechanism, which includes an air pump, a mixing bin, a mixing motor, a mixing impeller, a sand adding valve and a suction pipe; the mixing bin is fixedly arranged, a vent and a sand suction port are provided at the upper end of the mixing bin, a drop outlet is provided at the bottom of the mixing bin, and the drop outlet is connected to the sand adding bin; the air pump is fixedly arranged, and the air inlet of the air pump is sealed with the vent; one end of the suction pipe is sealed with the sand suction port; the mixing motor is fixedly arranged on the mixing bin; the mixing impeller is arranged inside the mixing bin, and the mixing impeller is coaxially connected to the rotating shaft of the mixing motor; the sand adding valve is slidably mounted on the bottom of the mixing bin, a sand adding hole is provided on the sand adding valve, and the sand adding valve can be operably moved to close the drop outlet or to move the sand adding hole to connect with the drop outlet.

3. The water tank test sand adding machine according to claim 1, characterized in that: The sand-gauging mechanism also includes an acoustic rangefinder and a meter; the sand-gauging bin is fixedly connected to the meter; the meter is fixedly set, and the meter is used to measure the mass of the sand-gauging bin and the sediment; there are multiple acoustic rangefinders, and the multiple acoustic rangefinders are all installed on the inner top of the sand-gauging bin.

4. The water tank test sand adding machine according to claim 1, characterized in that: The sand 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.

5. The water tank test sand adding machine 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 sand 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 sand 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.

6. The water tank test sand adding machine according to claim 5, 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 sand 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 sand discharge motor; An insulating pressure rod is connected to one end of the sand discharge valve. When the sand discharge motor drives the sand discharge valve to move to the sand discharge hole to be connected to the sand outlet, the insulating pressure rod abuts the second normally closed switch to disconnect the second normally closed switch; when the sand discharge motor drives the sand 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.

7. The water tank test sand adding machine according to claim 5, 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.

8. The water tank test sand adding machine 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.

9. The water tank test sand adding machine according to claim 2, characterized in that: The sand suction mechanism further comprises a filter screen, which is installed at the connection between the air inlet of the air pump and the vent.

10. The water tank test sand adding machine according to claim 5, characterized in that: The power supply of the control circuit is connected in series with the conveying motor via a sliding rheostat.

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