Screening device for construction waste treatment and control method

Abstract

The invention discloses a screening device for construction waste treatment and a control method, and relates to the technical field of construction solid waste treatment.The screening device comprises two overhead frames which are horizontally arranged at an interval, an iron remover annular belt is arranged at the interval, and guide channels are formed in the opposite faces of the two overhead frames; the de-ironing separator annular belt can be driven along the guide directions of the guide channels, the de-ironing separator annular belt consists of a plurality of chain plates which are mutually hinged, and the two ends of each chain plate respectively extend into the two guide channels; according to the iron remover, after the iron remover is started, the iron remover annular belt conducts circulating transmission, metal is attracted through magnetic force, the iron remover annular belt is composed of a plurality of hinged chain plates, the hinged ends of the chain plates slide along the straight track, the chain plates incline when passing through the protruding sections, strip-shaped grooves are formed, and when the metal moves to the strip-shaped grooves, particles clamped between the metal and the chain plates are exposed; the particles in the strip-shaped grooves are blown away through airflow, the air carries charges and is opposite to charges carried by dust, and therefore the particles are helped to be separated from the chain plates.

Description

Technical Field

[0001] This invention relates to the field of construction solid waste treatment technology, specifically to a screening device and control method for construction waste treatment. Background Technology

[0002] Construction waste is solid waste generated during the construction, renovation, expansion, or demolition of buildings. This type of construction waste has a complex composition, including concrete, metal, plastic, lightweight debris, etc., and its particle size distribution is uneven. It needs to be screened to achieve resource utilization.

[0003] In the process of screening construction waste, one of the steps is to separate the metal. The magnetic field generated by the iron separator attracts the metal in the construction waste. Common iron separators are mostly suspended. When construction waste mixed with metal passes through, the magnetic metals such as iron and steel are attracted by the magnetic field to the adsorption surface of the iron separator. The adsorption surface is, for example, a ring belt. As the equipment operates, the ring belt continuously drives and transports the metal to the designated collection area. By using magnetic force to attract metal, the metal originally mixed in with the waste will move rapidly towards the annular belt. During this rapid displacement, the metal will directly collide with the surrounding dust particles, causing the dust particles to fly. Some of the dust particles dispersed in the air will then adhere to the annular belt. Long-term accumulation will affect the magnetic separator's adsorption capacity. At the same time, the original purpose of the magnetic separator is to separate metal from other construction waste (including dust particles). When the annular belt transports the metal to the collection area, the attached dust will also be transported to the collection area, resulting in the need for secondary screening. Summary of the Invention

[0004] The purpose of this invention is to provide a screening device for construction waste treatment to solve the problems mentioned in the background art.

[0005] Another object of the present invention is to provide a control method.

[0006] To solve the above-mentioned technical problems, the present invention provides a screening device for construction waste treatment, comprising: Two overhead frames are horizontally spaced apart, with a magnetic separator ring belt installed at the interval. A guide channel is opened on the opposite side of the two overhead frames. The magnetic separator ring belt can be driven along the guide direction of the guide channel. The magnetic separator ring belt is composed of multiple hinged chain plates, with the two ends of the chain plates extending into the two guide channels respectively. The inner wall of the guide channel is provided with a straight track, and there is at least one protruding section on the straight track. The protruding section protrudes vertically from the sliding direction of the straight track to form an arc-shaped ramp. The two ends of the ramp are smoothly connected to the straight track. When the hinged ends of multiple adjacent chain plates slide to the ramp in sequence, the chain plates tilt upward and alternately form upward concave strip grooves. An air supply component is installed at the position of the guide channel relative to the raised section. The air supply component delivers air along the length of the strip groove. When the metal is driven to the raised section by the magnetic separator's annular belt, the particles that were squeezed in the contact area between the metal and the magnetic separator's annular belt are exposed. The air supply component outputs charged air to quickly carry away the particles.

[0007] Furthermore, the hinge end of the chain plate is rotatably connected to an adapter, and a telescopic component is provided above the adapter. The telescopic end at the bottom of the telescopic component is connected to the outer wall of the adapter, and a roller is connected to the outer wall of the telescopic component near the top. The roller is slidably connected to the chain plate. The telescopic component is equipped with a weight sensing element, which is electrically connected to the telescopic component. A trigger element is located in the middle of the slopes on both sides of the protruding section, which is electrically connected to the weight sensing element and is used to sense the weight of the metal magnetically attracted to the chain plate. When the weight exceeds the threshold set by the weight sensing element, the telescopic end of the telescopic component is extended; when the weight is below the threshold set by the weight sensing element, the telescopic end of the telescopic component is retracted.

[0008] Furthermore, the strip groove is provided with two transmission rods, which extend in the same direction as the strip groove and are respectively close to the two side walls of the strip groove; A transmission belt connects the two transmission rods. The transmission rod closer to the annular belt of the iron separator is close to the inner wall of the strip groove, so that the transmission belt at that point abuts against the inner wall of the strip groove. One end of the transmission rod is rotatably connected to the inner wall of the overhead frame, and the other end is connected to a drive device to drive the transmission rod to rotate, so that the transmission belt drives between the two transmission rods in the same direction as the annular belt of the iron separator.

[0009] Furthermore, a suction roller is also provided in the strip groove. The central axis of the suction roller coincides with the central axis of the strip groove. The diameter of the suction roller is larger than that of the transmission rod. The axis of the transmission rod is parallel to the axis of the suction roller. The suction roller is located above the transmission belt, and its lower surface presses against the transmission belt, causing the central part of the transmission belt to tilt downward, forming an inverted triangle. The suction roller has multiple suction holes on its outer wall, and the air outlet of the guide channel corresponds to the inside of the suction roller.

[0010] Furthermore, the suction roller is provided with a connecting rod, the central axis of the connecting rod overlaps with the central axis of the suction roller, the outer diameter of the connecting rod is smaller than the inner diameter of the suction roller, a spiral blade is installed between the outer wall of the connecting rod and the inner wall of the suction roller, one end of the connecting rod is rotatably connected to the inner wall of one of the overhead frames, and the other end of the connecting rod is connected to a driving component, which is used to drive the connecting rod to rotate.

[0011] Furthermore, the area enclosed by the transmission belt is provided with two hinged movable plates, and a mounting rod is provided at the hinge of the two movable plates. The movable plates are rotatably connected to the mounting rod, and the two ends of the mounting rod are rotatably connected to the inner walls of the two overhead frames respectively. The end of the movable plate opposite to the hinge end is rotatably connected to the outer wall of the transmission rod.

[0012] Furthermore, a rotating rod is provided at the hinge of each pair of adjacent chain plates. The rotating rod extends in the same direction as the chain plate, and both ends of the rotating rod extend into two guide channels respectively. The side wall of the chain plate is rotatably connected to the outer wall of the rotating rod, and the adapter is rotatably connected to the end of the rotating rod. The outer peripheral wall of the roller is provided with an inner ring groove, which is slidably engaged with the inner wall of the straight track.

[0013] Furthermore, a telescopic rod is installed at the top of the telescopic member, and a connecting lock is connected to the telescopic end of the telescopic rod. The connecting lock is connected to the drive mechanism for driving the annular belt drive of the iron remover.

[0014] A control method is applied to any of the above-described screening devices for construction waste treatment. The specific control method includes: The weight sensing element is set with a weight threshold M0. After the first trigger is triggered, the weight sensing element starts to sense the weight M1 of the metal magnetically attracted to the chain plate. The obtained weight M1 is compared with the threshold M0. If M1 is greater than M0, the telescopic end of the telescopic component is extended. If M1 is less than M0, the telescopic end of the telescopic component is retracted.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, after the iron separator is started, the iron separator's annular belt is driven in a circular motion. It attracts metal through magnetic force. The iron separator's annular belt is composed of multiple hinged chain plates. The hinged ends of the chain plates slide along the straight track. When passing through the raised section, the chain plates tilt to form a strip groove. When the metal moves to the strip groove, the particles sandwiched between the metal and the chain plate are exposed. The particles in the strip groove are blown away by the airflow. The gas carries an electric charge that is opposite to the charge carried by the dust, thereby helping the particles to detach from the chain plate.

[0016] 2. In this invention, the pressure sensor is triggered at the protruding section, and the opening of the strip groove is adjusted according to the weight of the chain plate. If it is a larger metal, the opening of the strip groove is increased, and if it is a smaller metal, the opening of the strip groove is decreased to reduce the risk of the metal falling into the strip groove. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the appearance of the suspended electromagnetic separator in this invention. Figure 3 This is a schematic diagram of the connection structure between the overhead frame and the chain plate in this invention; Figure 4 This is a schematic diagram of the connection structure between the roller and the straight track in this invention; Figure 5 This is a schematic diagram of the connection structure between the straight track and the raised section in this invention; Figure 6 This is a schematic diagram of the connection structure between the chain plate and the strip groove in this invention; Figure 7 This is a schematic diagram of the connection structure between the connecting rod and the helical blade in this invention; Figure 8 This is a schematic diagram of the connection structure between the transmission rod and the movable plate in this invention; Figure 9 This is a schematic diagram of the connection structure between the movable plate and the mounting rod in this invention; Figure 10 This is a schematic diagram of the connection structure between the overhead frame and the raised section in this invention; Figure 11 This is a schematic diagram of the connection structure between the rotating rod and the connector in this invention; Figure 12 This is a schematic diagram of the connection structure between the telescopic component and the telescopic rod in this invention; Figure 13 This is a schematic diagram of the connection structure between the chain plate and the rotating rod in this invention; Figure 14 This is a flowchart of the control method in this invention.

[0018] In the diagram: 1. Suspended electromagnetic separator; 101. Separator annular belt; 102. Chain plate; 103. Rotating rod; 104. Adapter; 105. Telescopic component; 106. Roller; 107. Inner annular groove; 108. Telescopic rod; 109. Lock; 2. Elevated frame; 201. Straight track; 202. Raised section; 3. Slot; 4. Guide channel; 5. Transmission rod; 6. Transmission belt; 7. Suction roller; 8. Connecting rod; 9. Spiral blade; 10. Movable plate; 11. Mounting rod. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] This invention provides a technical solution: See Figures 1-14 As shown, a screening device for construction waste treatment includes, Two overhead frames 2 are horizontally spaced apart, with a magnetic separator ring belt 101 installed at the interval. A guide channel 4 is opened on the opposite side of the two overhead frames 2. The magnetic separator ring belt 101 can be driven along the guide direction of the guide channel 4. The magnetic separator ring belt 101 is composed of multiple hinged chain plates 102, and the two ends of the chain plates 102 extend into the two guide channels 4 respectively. The inner wall of the guide channel 4 is provided with a straight track 201. The straight track 201 has at least one protruding section 202. The protruding section 202 protrudes vertically from the sliding direction of the straight track 201 to form an arc-shaped ramp. The two ends of the ramp are smoothly connected to the straight track 201. When the hinge ends of multiple adjacent chain plates 102 slide to the ramp in sequence, the chain plates 102 tilt upward and alternately form upward concave strip grooves 3. An air supply component is provided at the position of the guide channel 4 relative to the raised section 202. The air supply component delivers air along the length of the strip groove 3. When the metal is driven to the raised section 202 by the iron separator annular belt 101, the particles that are squeezed in the contact area between the metal and the iron separator annular belt 101 are exposed. The air supply component outputs charged air to quickly carry away the particles.

[0021] The air supply component specifically includes a metal mesh fixed at the air outlet of the fan, allowing air to pass through the metal mesh, and a wire connected to the ground wire of the suspended electromagnetic separator 1. Then install another metal needle, and fix it inside the fan with a plastic sheet. The metal needle should be separated from the metal mesh so that it does not touch. Connect the metal needle to the corresponding terminal of the high-voltage power supply. After turning on the fan, turn on the high-voltage power supply. Be careful not to set the high-voltage power supply too high. Then, blow air into the strip groove 3. The air carries an opposite charge to the dust. According to the principle that opposite charges attract each other, the air will suck up the dust particles and help them quickly detach from the inner wall of the strip groove 3. Please see Figure 1 and Figure 2 When construction waste is transported, it passes under the suspended electromagnetic separator 1. After the suspended electromagnetic separator 1 is started, the separator ring belt 101 begins to circulate and drive. At the same time, the magnetic force is activated. The magnetic force system is above the separator ring belt 101. The magnetic force is not generated by the separator ring belt 101 itself. The magnetic force generates magnetic attraction and attracts the metal below through the separator ring belt 101. The separator ring belt 101 is placed between the magnetic force system and the metal to prevent the metal from being directly attracted to the magnetic force system. The suspended electromagnetic separator 1 has its own drive system. The motor outputs rotational torque and drives the chain drive, which in turn drives the separator ring belt 101. The separator ring belt 101 is composed of multiple chain plates 102 that are hinged to each other. Two adjacent chain plates 102 can swing relative to each other. Two overhead frames 2 are fixed on both sides of the annular belt 101 of the iron separator. Please see... Figure 3 A guide channel 4 is opened on one side of the overhead frame 2 corresponding to the chain plate 102, and both ends of the chain plate 102 extend into the two guide channels 4 respectively. Please see Figure 10 The straight track 201 is opened on the side wall of the corresponding chain plate 102 of the overhead frame 2, that is, in the guide channel 4. Then the hinge end between each two adjacent chain plates 102 extends into the straight track 201. When the overall iron remover ring belt 101 is driven, it will slide along the straight track 201. Still watching Figure 10 A raised section 202 is formed on the straight track 201, which causes the chain plate 102 that slides to the raised section 202 to tilt upwards, forming... Figure 11 In the current state, when sliding along the straight track 201, the iron separator ring belt 101 is in a planar state. At this time, the metal is attracted to its bottom surface. Then the metal moves with the transmission of the iron separator ring belt 101. When the metal reaches the strip groove 3, the two adjacent chain plates 102 that are tilted upward will detach from the metal. Then the other chain plates 102 that are still in a planar state will continue to attract the metal. Then the fan outputs airflow into the strip groove 3, blowing off the dust particles adhering to the two chain plates 102 that are in a tilted state at this time. When the two chain plates 102 return to a parallel state, they will attract the metal again. After that, the subsequent chain plates 102 tilt one by one and the particles are removed. If the particles are blown away directly by gas in a parallel state, some particles stuck in the gap between the metal and the chain plate 102 will be difficult to blow off. By tilting multiple chain plates 102 upward one by one, the entire gap of the metal is exposed alternately, and the particles are removed more thoroughly. It is worth adding that the strip groove 3 formed by the upward tilt of the chain plate 102 is smaller than the smallest metal attracted by the iron separator ring belt 101, and the attracted metal is mostly irregular block or twisted iron wire, etc., and will not only contact two or three chain plates 102 at a time. In order to ensure the removal efficiency of particles, several raised sections 202 can be set on the straight track 201 as needed, and a distance should be maintained between the multiple raised sections 202.

[0022] See Figures 3-14 The hinge end of the chain plate 102 is rotatably connected to the adapter 104. A telescopic member 105 is provided above the adapter 104. The telescopic end at the bottom of the telescopic member 105 is fixedly connected to the outer wall of the adapter 104. A roller 106 is fixedly connected to the outer wall of the telescopic member 105 near the top. The roller 106 is slidably connected to the chain plate 102. The telescopic component 105 is equipped with a weight sensing element, which is electrically connected to the telescopic component 105. A trigger is provided at the middle of the slopes on both sides of the protruding section 202, which is electrically connected to the weight sensing element and is used to sense the weight of the metal that is magnetically attracted to the chain plate 102. When the weight is higher than the threshold set by the weight sensing element, the telescopic end of the telescopic component 105 is extended; when the weight is lower than the threshold set by the weight sensing element, the telescopic end of the telescopic component 105 is retracted.

[0023] Please pay close attention. Figure 10 Multiple adapters 104 are rotatably connected to the hinge ends of each chain plate 102. When the roller 106 slides along the protrusion 202, the telescopic member 105 moves upward and pulls the adapter 104 and the hinge end upward. After the hinge end moves upward, one side of the two chain plates 102 connected to the hinge end begins to tilt, and the chain plate 102 will also rotate along the hinge end. When two adjacent chain plates 102 swing together on opposite sides, a triangular strip groove 3 is formed. If the adapter 104 is directly connected to the chain plate 102, the chain plate 102 will move upward in parallel, making the area of ​​the strip groove 3 too large. This can easily cause the metal at the bottom of the strip groove 3 to bend into the strip groove 3. Moreover, when the metal is attracted by the magnetic force, it will stick tightly to the bottom of the chain plate 102. If the chain plate 102 moves upward in parallel directly, it will be difficult for the metal to detach from the chain plate 102 located on the protruding section 202. In the initial state, some telescopic components 105 have the same telescopic length, and the weight sensing element inside the telescopic component 105 will only be triggered in the area of ​​the protruding section 202. look Figure 10 The raised section 202 is composed of two slopes. The trigger is fixed inside the raised section 202 by the bracket, and the two triggers are respectively fixed in the middle of the two slopes. The weight sensing element is a pressure sensor, which is integrated between the telescopic end and the fixed end of the telescopic member 105. One end of the pressure sensor is close to the outer shell of the telescopic member 105, and the other end is close to the inner wall of the telescopic end. The weight pressure of the chain plate 102 is transmitted through the metal shell. according to Figure 10 From this perspective, the transmission direction of the iron separator ring belt 101 is from left to right. When the roller 106 slides past half of the left ramp of the protruding section 202, the roller 106 first presses down the contact of the left trigger, causing the trigger contact to close. Then, the left trigger will only send an electrical signal to this pressure sensor. After the pressure sensor is powered on, it immediately senses the weight on the chain plate 102 below it and then transmits it to its own telescopic component 105 controller. The controller compares the threshold. If the weight exceeds the threshold, it controls the telescopic end of the telescopic component 105 to extend a small distance, making the apex of the strip groove 3 lower and the opening at the bottom of the strip groove 3 wider. If the weight is below the threshold, the telescopic end of the telescopic component 105 is controlled to retract a certain distance, so that the apex of the strip groove 3 is raised, and the opening at the bottom of the strip groove 3 is narrower. Larger metals are heavier and exert stronger pressure on the chain plate 102. This can increase the opening at the bottom of the strip groove 3 and increase the area of ​​the wind-driven particles. Smaller metals are lighter and are more likely to bend at the gap due to magnetic attraction. Therefore, the opening at the bottom of the strip groove 3 is narrowed to reduce the risk of the metal bending into the strip groove 3. When the weight is within the threshold range, the telescopic component 105 maintains the initial telescopic length unchanged. Pulling the hinge end is only effective when the chain plate 102 is tilted and the hinge end is close to the apex of the protrusion 202. Therefore, the trigger is installed near the apex of the protrusion 202. When the roller 106 passes the apex of the protrusion 202 and triggers the trigger on the right, the trigger sends an electrical signal again to turn off the pressure sensor. At this time, the pressure sensor will automatically return to the initial extension length and then continue to follow the movement of the protrusion 202. There is a gap between each roller 106. For example, the trigger can only be pressed by rollers 106 within 5cm, but the rollers 106 are spaced 10cm apart. This ensures that the rollers 106 around the previous pressure sensor will move away from the trigger before the next roller 106 moves in, thus enabling sequential opening and closing. Each roller 106 is engraved with a unique code, and the trigger has a "code scanner". When a roller 106 presses down on the trigger, the code scanner reads the code and the controller identifies "the current sensor is the Nth sensor". Then, the Nth sensor is powered on individually via wireless signal or bus circuit. There is no hard wiring throughout the process. It is distinguished by the code, so even hundreds of pressure sensors can be accurately activated.

[0024] See Figures 5-8 The strip groove 3 is provided with two transmission rods 5. The transmission rods 5 extend in the same direction as the strip groove 3 and are close to the two side walls of the strip groove 3 respectively. A transmission belt 6 is connected between the two transmission rods 5. The transmission rod 5 closest to the transmission direction of the iron separator annular belt 101 is close to the inner wall of the strip groove 3, so that the transmission belt 6 at this point abuts against the inner wall of the strip groove 3. One end of the transmission rod 5 is rotatably connected to the inner wall of the overhead frame 2, and the other end is connected to a drive device for driving the transmission rod 5 to rotate, so that the transmission belt 6 is driven in the same direction as the iron separator annular belt 101 between the two transmission rods 5.

[0025] The transmission belt 6 and transmission rods 5 are positioned below the protruding section 202. One end of each transmission rod 5 is rotatably connected to the inner wall of one of the guide channels 4. A drive device, specifically a motor, is fixed inside the other guide channel 4 to drive the transmission rods 5 to rotate, thereby causing the transmission belt 6 to move along the transmission direction of the iron separator annular belt 101. Please see... Figure 5The right-side drive rod 5 is more biased to the right, and the bottom of the right-side inclined chain plate 102 will rub against the outer wall of the drive belt 6. Dust adheres to the drive belt 6 through the contact between the two. As the drive belt 6 is driven, it helps the gas output by the fan to transfer the particles. Meanwhile, the left-side drive rod 5 is slightly biased to the right and does not contact the chain plate 102.

[0026] See Figures 4-6 The strip groove 3 is also equipped with a suction roller 7. The central axis of the suction roller 7 coincides with the central axis of the strip groove 3. The diameter of the suction roller 7 is larger than that of the transmission rod 5. The axis of the transmission rod 5 is parallel to the axis of the suction roller 7. The suction roller 7 is located above the transmission belt 6, and its lower surface presses the transmission belt 6, causing the central part of the transmission belt 6 to tilt downward, forming an inverted triangle. The suction roller 7 is designed with both ends through it and has multiple suction holes on its outer wall. The air outlet of the guide channel 4 corresponds to the inside of the suction roller 7.

[0027] Please see Figure 6 Both the iron removal ring belt 101 and the transmission belt 6 move to the left. The middle of the transmission belt 6 is inclined downwards, which makes it easier for particles adhering to the outer wall of the transmission belt 6 from the right to fall down the slope to the suction roller 7 as the transmission belt 6 moves to the left. Then, the fan is fixed to the end of the suction roller 7. The gas transmitted by the fan flows inside the suction roller 7 and generates suction through the suction holes on the suction roller 7 to attract the particles. The particles enter the suction roller 7. The two ends of the suction roller 7 are open and extend into two guide channels 4 respectively. The particles fall into one of the guide channels 4 when they reach the end of the suction roller 7. Then, the air supply component is installed in the other guide channel 4 to transfer the particles.

[0028] See Figures 4-7 The suction roller 7 is provided with a connecting rod 8. The central axis of the connecting rod 8 overlaps with the central axis of the suction roller 7. The outer diameter of the connecting rod 8 is smaller than the inner diameter of the suction roller 7. A spiral blade 9 is fixedly installed between the outer wall of the connecting rod 8 and the inner wall of the suction roller 7. One end of the connecting rod 8 is rotatably connected to the inner wall of one of the overhead frames 2. The other end of the connecting rod 8 is connected to a driving component, which is used to drive the connecting rod 8 to rotate.

[0029] Please take a look. Figure 6 and Figure 7 The connecting rod 8 located in the middle of the suction roller 7 has one end rotatably connected to the inner wall of one of the guide channels 4, and the other end extends into another guide channel 4. A drive component, namely a motor, is fixedly connected to the connecting rod 8 in this guide channel 4 to control the rotation of the connecting rod 8 independently. The connecting rod 8 is fixedly connected to the inner wall of the suction roller 7 through the spiral blade 9. In this way, when the connecting rod 8 rotates, it drives the suction roller 7 to rotate together through the spiral blade 9. The connecting rod 8 rotates counterclockwise, so that the suction roller 7 rotates in the same direction as the transmission belt 6. The outer wall of the suction roller 7 can also help drive the transmission belt 6. At the same time, since the spiral blade 9 is in a spiral state, the rotation of the spiral blade 9 can help push the particles that have entered the suction roller 7 into the channel.

[0030] See Figures 5-9 Two hinged movable plates 10 are provided in the area enclosed by the transmission belt 6. A mounting rod 11 is provided at the hinge of the two movable plates 10. The movable plates 10 and the mounting rod 11 are rotatably connected. The two ends of the mounting rod 11 are rotatably connected to the inner walls of the two overhead frames 2 respectively. The end of the movable plate 10 opposite to the hinge end is rotatably connected to the outer wall of the transmission rod 5.

[0031] Please see Figure 9 The side walls of two adjacent movable plates 10 are rotatably connected to the mounting rod 11. The movable plates 10 can rotate along the outer wall of the mounting rod 11. The side of the two movable plates 10 connected to the mounting rod 11 is inclined downward to form a V-shape. The side of the movable plates 10 away from the mounting rod 11 is rotatably connected to the outer wall of the transmission rod 5 through a joint. In this way, when the transmission rod 5 rotates, it will not drive the movable plates 10 to rotate as well. Multiple annular grooves are provided on the transmission rod 5. The movable plate 10 is rotatably connected to the annular grooves through a joint. Then, the diameter of the transmission rod 5 is larger than the annular grooves. The inner wall of the transmission belt 6 is in close contact with the outer wall of the transmission rod 5. In this way, when the transmission rod 5 rotates and drives the transmission belt 6, the transmission belt 6 will not be in close contact with the joint on the movable plate 10, so as not to affect the tight connection between the transmission belt 6 and the transmission rod 5. The movable plate 10 is supported in the area enclosed by the transmission belt 6, so that the transmission belt 6 maintains the required V-shape.

[0032] See Figures 4-12 Each pair of adjacent chain plates 102 is provided with a rotating rod 103 at the hinge. The rotating rod 103 extends in the same direction as the chain plate 102. Both ends of the rotating rod 103 extend into the two guide channels 4 respectively. The side wall of the chain plate 102 is rotatably connected to the outer wall of the rotating rod 103. The adapter 104 is rotatably connected to the end of the rotating rod 103. The outer peripheral wall of the roller 106 is provided with an inner ring groove 107. The inner ring groove 107 is slidably engaged with the inner wall of the straight track 201.

[0033] Please see Figure 11 The rotating rod 103 is fixedly connected to one side of one of the two adjacent chain plates 102, and then the other chain plate 102 is rotatably connected to the outer wall of the rotating rod 103. The two ends of the rotating rod 103 are rotatably connected to two adjacent adapters 104 respectively. The top of the adapter 104 is fixedly connected to the telescopic end of the bottom of the telescopic member 105. The roller 106 is fixedly installed on the outer wall of the telescopic member 105, near the top of the telescopic member 105. Let's look at it together. Figure 4 The roller 106 is slidably fastened to the inner wall of the straight track 201 through the inner ring groove 107. When the iron remover ring belt 101 is driven, the roller 106 will slide along the straight track 201 until it slides to the protruding section 202. The telescopic member 105 and the roller 106 move upward with the tilt of the protruding section 202, and then pull the rotating rod 103 to move upward together, so that the corresponding side of the two adjacent chain plates 102 tilts upward to form the strip groove 3.

[0034] See Figure 12 A telescopic rod 108 is fixedly installed at the top of the telescopic member 105. A connecting lock 109 is fixedly connected to the telescopic end of the telescopic rod 108. The connecting lock 109 is connected to the drive mechanism used to drive the iron separator ring belt 101.

[0035] The top of the telescopic component 105 is fixedly connected to the telescopic rod 108, and then the latch 109 is fixed on the telescopic end of the telescopic rod 108. The latch 109 is connected to the chain. Since the transmission path of the chain is fixed, the chain always maintains a parallel transmission path. When the telescopic component 105 and the roller 106 move up with the slope of the protruding section 202, the height of the latch 109 and the chain remains unchanged, so the telescopic rod 108 will retract. When it returns to the parallel section of the straight track 201, the telescopic rod 108 will extend. This allows the chain plate 102 to tilt without affecting the path of the chain.

[0036] See Figures 1-14 The present invention also provides a control method for a screening device for construction waste treatment applied to any of the above embodiments. The specific control method includes... The roller 106 first slides over and triggers the trigger element in the transmission direction of the iron remover ring belt 101. The trigger element activates the weight sensing element that has just passed over. The weight sensing element controls the extension or retraction of the telescopic member 105 according to the weight of the metal magnetically attracted on the chain plate 102. The weight sensing element is set with a weight threshold M0. After the first trigger is triggered, the weight sensing element starts to sense the weight M1 of the metal magnetically attracted to the chain plate. The obtained weight M1 is compared with the threshold M0. If M1 is greater than M0, the telescopic end of the telescopic component is extended, the height of the strip groove 3 is reduced and its bottom is widened. When M1 is less than M0, the telescopic end of the telescopic component is retracted, the height of the strip groove 3 is increased and its bottom is narrowed. After being activated, the weight sensing element is deactivated again after passing through the trigger on the other side of the ramp of the protruding section 202.

Claims

1. A screening device for construction waste treatment, characterized in that, include, Two overhead frames (2) are horizontally spaced apart, with a magnetic separator ring belt (101) at the interval. A guide channel (4) is opened on the opposite side of the two overhead frames (2). The magnetic separator ring belt (101) can be driven along the guide direction of the guide channel (4). The magnetic separator ring belt (101) is composed of multiple hinged chain plates (102). The two ends of the chain plates (102) extend into the two guide channels (4) respectively. The inner wall of the guide channel (4) is provided with a straight track (201). The straight track (201) has at least one protruding section (202). The protruding section (202) protrudes vertically from the sliding direction of the straight track (201) to form an arc-shaped ramp. The two ends of the ramp are smoothly connected to the straight track (201). When the hinge ends of multiple adjacent chain plates (102) slide to the ramp in sequence, the chain plates (102) tilt upward and alternately form upward concave strip grooves (3). An air supply component is provided at the position of the guide channel (4) relative to the raised section (202). The air supply component delivers air along the length of the strip groove (3) to expose the particles that are squeezed in the contact area between the metal and the iron separator ring belt (101) when the metal is driven to the raised section (202) by the iron separator ring belt (101). The air supply component outputs charged air to quickly carry away the particles.

2. The screening device for construction waste treatment as described in claim 1, characterized in that: The hinge end of the chain plate (102) is rotatably connected to the adapter (104), and a telescopic component (105) is provided above the adapter (104). The telescopic end at the bottom of the telescopic component (105) is connected to the outer wall of the adapter (104). A roller (106) is connected to the outer wall of the telescopic component (105) near the top. The roller (106) is slidably connected to the chain plate (102). The telescopic component (105) is equipped with a weight sensing element, which is electrically connected to the telescopic component (105). A trigger is provided at the middle of the slopes on both sides of the protruding section (202), which is electrically connected to the weight sensing element and is used to sense the weight of the metal magnetically attracted to the chain plate (102). When the weight is higher than the threshold set by the weight sensing element, the telescopic end of the telescopic component (105) is extended; when the weight is lower than the threshold set by the weight sensing element, the telescopic end of the telescopic component (105) is retracted.

3. The screening device for construction waste treatment as described in claim 1, characterized in that: The strip groove (3) is provided with two transmission rods (5), which extend in the same direction as the strip groove (3) and are close to the two side walls of the strip groove (3). A transmission belt (6) is connected between the two transmission rods (5). The transmission rod (5) closest to the annular belt (101) of the iron separator is close to the inner wall of the strip groove (3), so that the transmission belt (6) at that point abuts against the inner wall of the strip groove (3). One end of the transmission rod (5) is rotatably connected to the inner wall of the overhead frame (2), and the other end is connected to a drive device for driving the transmission rod (5) to rotate, so that the transmission belt (6) is driven in the same direction as the annular belt (101) of the iron separator between the two transmission rods (5).

4. The screening device for construction waste treatment as described in claim 3, characterized in that: The strip groove (3) is also provided with a suction roller (7). The central axis of the suction roller (7) coincides with the central axis of the strip groove (3). The diameter of the suction roller (7) is larger than that of the transmission rod (5). The axis of the transmission rod (5) is parallel to the axis of the suction roller (7). The suction roller (7) is located above the transmission belt (6), and its lower surface presses against the transmission belt (6), causing the center part of the transmission belt (6) to tilt downward, forming an inverted triangle. The suction roller (7) is connected at both ends and has multiple suction holes on its outer wall. The air outlet of the guide channel (4) corresponds to the inside of the suction roller (7).

5. A screening device for construction waste treatment as described in claim 4, characterized in that: The suction roller (7) is provided with a connecting rod (8). The central axis of the connecting rod (8) overlaps with the central axis of the suction roller (7). The outer diameter of the connecting rod (8) is smaller than the inner diameter of the suction roller (7). A spiral blade (9) is installed between the outer wall of the connecting rod (8) and the inner wall of the suction roller (7). One end of the connecting rod (8) is rotatably connected to the inner wall of one of the overhead frames (2). The other end of the connecting rod (8) is connected to a driving component, which is used to drive the connecting rod (8) to rotate.

6. The screening device for construction waste treatment as described in claim 5, characterized in that: Two hinged movable plates (10) are provided in the area enclosed by the transmission belt (6). A mounting rod (11) is provided at the hinge of the two movable plates (10). The movable plates (10) and the mounting rod (11) are rotatably connected. The two ends of the mounting rod (11) are rotatably connected to the inner walls of the two overhead frames (2) respectively. The end of the movable plate (10) opposite to the hinge end is rotatably connected to the outer wall of the transmission rod (5).

7. A screening device for construction waste treatment as described in claim 6, characterized in that: A rotating rod (103) is provided at the hinge of each pair of adjacent chain plates (102). The rotating rod (103) extends in the same direction as the chain plate (102). The two ends of the rotating rod (103) extend into the two guide channels (4) respectively. The side wall of the chain plate (102) is rotatably connected to the outer wall of the rotating rod (103). The adapter (104) is rotatably connected to the end of the rotating rod (103). The outer peripheral wall of the roller (106) is provided with an inner ring groove (107). The inner ring groove (107) is slidably fastened to the inner wall of the straight track (201).

8. A screening device for construction waste treatment as described in claim 2, characterized in that: The top end of the telescopic member (105) is equipped with a telescopic rod (108), and the telescopic end of the telescopic rod (108) is connected to a connecting buckle (109). The connecting buckle (109) is connected to a drive mechanism for driving the annular belt (101) of the iron remover.

9. A control method, characterized in that: The screening device for construction waste treatment according to any one of claims 2-8 includes a specific control method comprising: The weight sensing element is set with a weight threshold M0. After the first trigger is triggered, the weight sensing element starts to sense the weight M1 of the metal magnetically attracted to the chain plate. The obtained weight M1 is compared with the threshold M0. If M1 is greater than M0, the telescopic end of the telescopic component is extended. If M1 is less than M0, the telescopic end of the telescopic component is retracted.

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