high square flat sieve

Abstract

The application provides a high square flat sieve, which comprises a sieve body, two feeding racks, two slide detection mechanisms, a plurality of composite pressing mechanisms and a controller; the middle part of the sieve body is a driving box, the two sides of the driving box are sieve boxes, and the sieve boxes are provided with stacked sieve grids; the two feeding racks are located above the two rows of sieve boxes respectively; the two slide detection mechanisms are connected with the feeding racks and are used for detecting the vertical distance between each feeding rack and the top wall of the sieve body; the plurality of composite pressing mechanisms are correspondingly arranged on the top wall of each sieve box and are all provided with four pressing output ends; the four pressing output ends are all provided with pressure sensors and are correspondingly pressed on the corner positions of the top sieve grid; and the controller is electrically connected with the driving box, the slide detection mechanisms and the composite pressing mechanisms respectively. The high square flat sieve provided by the application can avoid the material channeling problem caused by the loosening of the sieve grid and improve the production safety and production efficiency of the high square flat sieve.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of high square screen, and particularly relates to a high square flat screen. BACKGROUND

[0002] The high square flat screen is a common structure form of the high square screen, is installed by four corner suspensions, and generates flat swing rotary motion for material screening by self-balancing driving. Since the high square flat screen is large in size and heavy in weight, if connection sliding occurs between the screen body and one or more hangers during operation, a large safety accident is likely to occur, so it is necessary to control the connection reliability between the screen body and each hanger at all times. In addition, the screen grids stacked in each screen box of the high square flat screen need to be reliably pressed by a pressing mechanism to ensure that the screen grids are tightly attached to each other and avoid material leakage.

[0003] At present, in order to ensure the safe and stable operation of the high square flat screen, the suspension connection reliability of the screen body is determined by artificial regular inspection, and it is judged whether the screen pile is loose according to the running noise. The inspection process basically depends on the vision and hearing of the workers, and the experience requirement of the inspection personnel is very high. It is easy to cause the wrong judgment of shutdown inspection to affect the production efficiency or the omission judgment to cause the screen body to slide or the material to leak. Therefore, at present, it is urgent to develop a self-checking system for the high square flat screen to reduce the requirement and dependence on artificial inspection, reduce unnecessary shutdown inspection time to ensure production efficiency, improve equipment operation safety, and avoid the material leakage problem caused by loose screen grids. SUMMARY

[0004] The embodiment of the present application provides a high square flat screen, which aims to avoid the material leakage problem caused by loose screen grids and improve the equipment operation safety and work efficiency.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is to provide a high square flat screen, which comprises:

[0006] The screen body is suspended and installed at four hangers on the same horizontal plane, the middle part of the screen body is provided with a driving box, and each side of the driving box is provided with a row of screen boxes. Each screen box is stacked with multiple layers of screen grids.

[0007] Two feeding racks are located directly above the two rows of screen boxes and are fixedly connected with at least one hanger. Each feeding rack is provided with a plurality of feeding cloth bags corresponding to each screen box below the feeding rack.

[0008] Two sliding detection mechanisms are respectively arranged directly above the lateral two side edges of the screen body and are connected with at least one feeding rack. The two sliding detection mechanisms are respectively used to detect the vertical distance between each to the top wall of the screen body.

[0009] A plurality of composite pressing mechanisms are correspondingly arranged on the top wall of each screen box, each composite pressing mechanism has four downward vertical pressing output ends, the four pressing output ends are correspondingly arranged at the corner positions of the top layer screen grid, and a pressure sensor is arranged on each of the four pressing output ends;

[0010] A controller is electrically connected with the drive box, the sliding detection mechanism and each composite pressing mechanism. The controller is configured to acquire the distance detection value of the sliding detection mechanism, and control the drive box to stop when the distance detection value exceeds a threshold value. The controller is further configured to acquire the pressure detection value of each pressure sensor, and control the corresponding composite pressing mechanism to adjust the pressing force of the pressing output end when the pressure detection value exceeds a threshold value.

[0011] In a possible implementation, the sliding detection mechanism includes a connecting frame, a distance measuring sensor and a detection plate. The two ends of the connecting frame are fixedly connected with the two feed frames respectively. The distance measuring sensor is arranged on the connecting frame and the sensing end faces downward. The detection plate is arranged on the top wall of the screen body and located directly below the distance measuring sensor. The distance measuring sensor is configured to detect the vertical distance between the sensing end and the detection plate to obtain the distance detection value.

[0012] In some embodiments, the top surface of the detection plate is a spherical surface with a center upwardly protruding. The center of the spherical surface is aligned with the distance measuring sensor in the vertical direction, and the radius of the spherical surface is equal to the vertical distance from the center of the spherical surface to the lifting point.

[0013] In some embodiments, the detection plate extends longitudinally to form a long strip plate. A sliding block is slidingly connected to the connecting frame in the longitudinal direction. The sliding block is connected to the two ends of the detection plate by elastic ropes. The distance measuring sensor is arranged on the sliding block. When the screen body is driven by the drive box to perform a horizontal swing rotary motion, the sliding block moves in a direction opposite to the longitudinal swing direction of the screen body under the traction of the detection plate.

[0014] For example, the connecting frame includes two fixed seats, two sliding rods, two screws, two first driving members and two thrust blocks. The two fixed seats are longitudinally aligned and fixedly connected with the two feed frames respectively. Each fixed seat is provided with a guide wheel through which an elastic rope is adapted to pass. The two sliding rods are transversely spaced apart and slidingly arranged in the sliding block in the longitudinal direction. The two ends of each sliding rod are fixedly connected with one of the feed frames. The two screws are located on the two sides of the sliding block in the transverse direction, and the two ends of each screw are rotatably connected with one of the fixed seats. The two first driving members are arranged on one of the fixed seats, and the output ends of the two first driving members are connected with one of the screws. The two first driving members are electrically connected with the controller. The two thrust blocks are screw-connected with one of the screws and slidingly connected with the two sliding rods. The two thrust blocks are located on the two sides of the sliding block in the longitudinal direction.

[0015] For example, the two thrust blocks are provided with first permanent magnets, the sliding block is provided with a second permanent magnet, and the two first permanent magnets repel the second permanent magnet.

[0016] In a possible implementation, the bottom of the detection plate is longitudinally spaced apart with two telescopic support seats, the two telescopic support seats are connected with the top wall of the screen body, a second driving member is arranged between the two telescopic support seats, the second driving member is fixed to the top wall of the screen body and the output end is connected with the detection plate.

[0017] In some embodiments, each composite pressing mechanism includes two composite pressing members, and the two composite pressing members are fixed to the lateral two side edges of one of the screen boxes;

[0018] Each composite pressing member includes a housing, two pressing rods, two worm gears, two worms, and two third driving members. The housing is fixedly connected with the top wall of the screen box. The two pressing rods are slidingly connected in the housing in the vertical direction and are longitudinally spaced apart. One end of each pressing rod penetrates into the screen box downward and forms a pressing output end. The other end of the pressing rod penetrates out of the housing upward and forms a first operation end. The two worm gears are rotatably connected in the housing and are sleeved on one of the pressing rods, and the worm gear is threadedly connected with the pressing rod. The two worms are rotatably connected in the housing and are engaged with one of the worm gears. The two third driving members are arranged in the housing and are electrically connected with the controller. The output ends of the two third driving members are connected with the two worms.

[0019] For example, the composite pressing member further includes a first sleeve, a second sleeve, and an operation rod. The first sleeve is rotatably connected in the housing and is slidingly connected with the housing in the longitudinal direction. A first gear is sleeved on the first sleeve. The first gear is engaged with a second gear sleeved on one of the worms. One end of the first sleeve penetrates out of the housing and forms a second operation end. The second sleeve is rotatably connected in the housing and is coaxial with the first sleeve. A third gear is sleeved on the second sleeve. The third gear is engaged with a fourth gear sleeved on the other worm. The second sleeve has a polygonal hole section. One end of the operation rod is slidingly arranged in the second sleeve and has a polygonal column. The other end of the operation rod penetrates through the first sleeve and extends out of the second operation end and forms a third operation end.

[0020] The first sleeve has a first transmission connection state of sliding to the engagement of the first gear and the second gear, and has a first transmission interruption state of sliding to the disengagement of the first gear and the second gear. The operation rod has a second transmission connection state of sliding to the plug-in connection of the polygonal column and the polygonal hole section, and has a second transmission interruption state of sliding to the disengagement of the polygonal column and the polygonal hole section.

[0021] For example, the first sleeve extending into the shell has a first stop table at one end, and a first elastic member is sleeved on the first sleeve, one end of the first elastic member abuts against the first stop table, and the other end is connected with the shell; the operating rod has a second stop table at a position between the first sleeve and the second sleeve, and a second elastic member is sleeved on the operating rod, one end of the second elastic member abuts against the second stop table, and the other end is connected with the shell; wherein the first sleeve is kept in a first transmission interruption state under the thrusting action of the first elastic member, and the operating rod is kept in a second transmission interruption state under the thrusting action of the second elastic member.

[0022] The high square flat screen has the advantages that: compared with the prior art, the high square flat screen is suspended and installed through four lifting points in the same horizontal plane, can perform flat swing rotary motion under the driving of the drive box, so that the stacked screen grids in each screen box perform material screening; the feeding rack fixedly connected with the lifting points remains in a stationary state and feeds the moving screen box through a feeding cloth bag, so that the feeding stability can be ensured; the slide detection mechanisms respectively located at the two lateral sides of the screen body can respectively detect the vertical distance between each and the top wall of the screen body, so that whether the screen body slides is judged, and when the screen body slides is judged, the controller controls the driving member to stop outputting power in time to stop the machine, so that the safety accidents caused by the screen body falling are avoided; the composite pressing mechanism that can detect the pressing force of the top layer screen grid is arranged corresponding to each screen box, when the screen grid loosens is detected by the pressure sensor, the controller can control the corresponding composite pressing mechanism to act to automatically adjust the pressing force of the screen grid, so that the material channeling problem caused by the screen grid loosening is avoided, not only the dependence on artificial inspection can be reduced, unnecessary shutdown maintenance caused by artificial misjudgment or the problem of material channeling caused by screen grid loosening due to artificial missed judgment is avoided, so that the production efficiency and production stability are improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The high square flat screen is provided with a three-dimensional structure schematic view;

[0024] Figure 2 The three-dimensional structure schematic view of the slide detection mechanism adopted by the embodiment of the present application is shown in the figure;

[0025] Figure 3 The detection principle schematic view of the slide detection mechanism is shown in the figure; Figure 2

[0026] Figure 4 The three-dimensional structure schematic view of the slide detection mechanism adopted by another embodiment of the present application is shown in the figure;

[0027] Figure 5 The front view structure schematic view of the slide detection mechanism is shown in the figure; Figure 4

[0028] Figure 6 ​​This is a schematic diagram of the installation structure of the composite pressing mechanism on the screen box used in the embodiments of the present invention;

[0029] Figure 7 This is a three-dimensional structural diagram of the composite clamping component used in the embodiments of the present invention;

[0030] Figure 8 For along Figure 7 Schematic diagram of the cross-sectional structure along line AA;

[0031] Figure 9 For along Figure 8 Schematic diagram of the cross-sectional structure of the middle BB line;

[0032] Figure 10 This is a schematic diagram of the disassembled structure of the second sleeve and operating rod used in an embodiment of the present invention;

[0033] Figure 11 The control principle block diagram of the high-square flat screen provided in the embodiment of the present invention.

[0034] In the diagram: 10. Screen body; 100. Lifting point; 11. Drive box; 12. Screen box; 121. Screen grid; 20. Feed rack; 21. Feed bag; 30. Slippage detection mechanism; 31. Connecting frame; 311. Fixed seat; 3111. Guide wheel; 312. Slide rod; 313. Screw; 314. First driving component; 315. Thrust block; 3151. First permanent magnet; 32. Distance sensor; 33. Detection plate; 34. Slider; 341. Second permanent magnet; 35. Elastic rope; 36. Telescopic support seat; 37. Second driving component; 40. Composite clamping mechanism; 400. Composite clamping component ; 41. Housing; 42. Pressing rod; 421. First operating end; 43. Worm gear; 44. Worm; 441. Second gear; 442. Fourth gear; 45. Third driving component; 46. First sleeve; 461. First gear; 462. Second operating end; 463. First stop plate; 464. First elastic element; 47. Second sleeve; 471. Third gear; 472. Polygonal hole segment; 48. Operating rod; 481. Polygonal column; 482. Third operating end; 483. Second stop plate; 484. Second elastic element; 50. Pressure sensor; 600. Audible and visual alarm. Detailed Implementation

[0035] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0036] It should be noted that when an element is referred to as being "set on", "connected" to another element, it can be directly on the other element or indirectly on the other element. It should be understood that the terms "transverse", "longitudinal", "upper", "lower", "front", "back", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. The terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified.

[0037] Please refer to Figure 1 , Figure 6 and Figure 11 , now the high square flat screen provided by the present application will be described. The high square flat screen comprises a screen body 10, two feeding racks 20, two sliding detection mechanisms 30, a plurality of composite compression mechanisms 40, and a controller.

[0038] The screen body 10 is suspendedly installed on four lifting points 100 on the same horizontal plane, and the middle part of the screen body 10 is provided with a driving box 11, and the longitudinal two sides of the driving box 11 are each provided with a row of screen boxes 12, and each screen box 12 is stacked with a plurality of screen grids 121 in an up-down manner.

[0039] Since the screen body 10 of the high square flat screen is a cube, a four-corner suspension mode is adopted, and at the same time, in order to ensure that the rotary motion of the screen body 10 can be in the same plane to form a horizontal swing rotation, the four lifting points 100 should be in the same horizontal plane, and the screen body 10 and the four lifting points 100 are connected through four equal-length glass steel lifting rods; the driving box 11 can be a structure that rotates by driving an eccentric mass block to form a self-balancing driving force, and in this case, the driving mode of the screen body 10 is the same as the existing structure, which will not be described in detail; a row of screen boxes 12 is arranged on the two sides of the driving box 11 respectively to ensure the symmetry of the overall structure, thereby ensuring the stability of the motion, and it should be noted that each row of screen boxes 12 comprises a plurality of screen boxes 12 arranged in a transverse direction, or it can also be understood that each row of screen boxes 12 has a plurality of screen cavities distributed in a transverse direction, and in this case, each screen box 12 is equivalent to each screen cavity, and the screen grids 121 are stacked in an up-down manner inside each screen box 12 to form a screen pile.

[0040] The two feeding racks 20 are respectively located above the two rows of screen boxes 12, and are respectively fixedly connected with at least one lifting point 100, and each feeding rack 20 is provided with a plurality of feeding cloth bags 21 connected with the corresponding screen boxes 12 below the feeding rack 20.

[0041] The fixed connection mode of the feeding rack 20 and the lifting point 100 can be that two groups of steel poles fixed with the two lifting points 100 respectively are fixedly connected with the two ends of the same feeding rack 20, so that the feeding rack 20 is fixed above the row of screen boxes 12. Since the feeding rack 20 is stationary during the movement of the screen body 10, the feeding bag 21 is used to connect the feeding port on the feeding rack 20 with the feeding port on the top wall of each screen box 12, so as to realize stable feeding during the movement of the screen body 10.

[0042] The two sliding detection mechanisms 30 are respectively arranged above the lateral two side edges of the screen body 10 and are respectively connected with at least one feeding rack 20. The two sliding detection mechanisms 30 are respectively used to detect the vertical distance between each and the top wall of the screen body 10.

[0043] Since the upper area of the longitudinal two sides of the screen body 10 has the feeding rack 20, the space cannot meet the requirement of arranging the sliding detection mechanism 30. Therefore, the two sliding detection mechanisms 30 are arranged above the lateral two side edges of the screen body 10, so that the absolute height of the lateral two sides of the screen body 10 can be detected. When the vertical distance between the sliding detection mechanism 30 and the top wall of the screen body 10 increases, it means that the screen body 10 slides and sinks.

[0044] The plurality of composite pressing mechanisms 40 are respectively arranged on the top wall of each screen box 12. Each composite pressing mechanism 40 has four vertical downward pressing output ends extending into the screen box 12. The four pressing output ends are respectively arranged at the corner positions of the top layer of screen grids 121. The four pressing output ends are respectively provided with pressure sensors 50.

[0045] The pressure sensors 50 arranged on the four pressing output ends of the composite pressing mechanism 40 can detect the pressing force on the four corner positions of the top layer of screen grids 121. When the detection value of the pressure sensor 50 decreases, it means that the corresponding position is loose. It should be noted that the composite pressing mechanism 40 can be provided with a driving member to adjust the output pressure of each pressing output end. When the detection value of the pressure sensor 50 decreases, the driving member automatically increases the pressing force of the corresponding pressing output end, so as to timely adjust the looseness of the screen grid 121 and avoid the problem of leakage between the screen grids 121.

[0046] The controller is electrically connected with the driving box 11, the slide detection mechanism 30 and each composite pressing mechanism 40 respectively; the controller is used for acquiring the distance detection value of the slide detection mechanism 30, and controls the driving box 11 to stop when the distance detection value exceeds a threshold value; the controller is also used for acquiring the pressure detection value of each pressure sensor 50, and controls the corresponding composite pressing mechanism 40 to adjust the pressing force of the output end thereof when the pressure detection value exceeds a threshold value.

[0047] It should be noted that, since the slight vibration in the height direction may exist in the swing rotary motion of the screen body 10, in order to avoid the misjudgment and cause the stop, the distance detection value can be set as an interval threshold range, and the controller triggers the stop instruction of the driving box 11 only when the distance detection value of the distance detection sensor 32 exceeds the threshold range; similarly, the pressing force of the screen grid 121 during the operation of the screen body 10 also has a certain reasonable fluctuation, so the pressure detection value should also be compared with the reasonable threshold interval, and the corresponding action of the composite pressing mechanism 40 is triggered only when the pressure detection value exceeds the threshold interval.

[0048] Compared with the prior art, the high square flat screen provided in the embodiment can be swing rotary moved under the driving of the driving box 11, so that the screen grids 121 stacked in each screen box 12 are subjected to material screening; the feeding rack 20 fixedly connected with the lifting point 100 remains in a stationary state and feeds the moving screen box 12 through the feeding cloth bag 21, so that the feeding stability can be ensured; the slide detection mechanism 30 located at the transverse two sides of the screen body 10 can detect the vertical distance between each self and the top wall of the screen body 10 respectively, so as to judge whether the screen body 10 slides, and the driving member is controlled to stop outputting power and stop in time by the controller when the screen body 10 slides, so as to avoid the safety accidents caused by the falling of the screen body 10; the composite pressing mechanism 40 corresponding to each screen box 12 can detect the pressing force of the top layer screen grid 121, and the controller can control the corresponding composite pressing mechanism 40 to act to automatically adjust the pressing force of the screen grid 121 when the pressure sensor 50 detects that the screen grid 121 is loose, so as to avoid the material leakage problem caused by the loosening of the screen grid 121, which not only can reduce the dependence on manual inspection, avoid unnecessary stop and maintenance caused by manual misjudgment, or the problem of material leakage caused by the loosening of the screen grid 121 due to manual missed judgment, and thus improve the production efficiency and production stability.

[0049] In some embodiments, referring to Figure 2 and Figure 3The sliding detection mechanism 30 comprises a connecting frame 31, a distance measuring sensor 32 and a detection plate 33. The two ends of the connecting frame 31 are fixedly connected with the two feed frames 20 respectively. The distance measuring sensor 32 is arranged on the connecting frame 31 and the sensing end thereof faces downward. The detection plate 33 is arranged on the top wall of the screen body 10 and is located directly below the distance measuring sensor 32. The distance measuring sensor 32 is used to detect the vertical distance from the sensing end thereof to the detection plate 33 to obtain a distance detection value.

[0050] The distance measuring sensor 32 is connected with the feed frame 20 through the connecting frame 31 and can keep a stable stationary state. The detection plate 33 is arranged on the top wall of the screen body 10 and is designed to form a stable detection surface. During the horizontal swing rotary motion of the screen body 10, the distance measuring sensor 32 forms a circular detection track relative to the upper surface of the detection plate 33. Under normal circumstances, the distance detection value on the entire detection track should be within the set threshold range of the distance measuring sensor 32. When the screen body 10 slides, the distance detection value will exceed the threshold range during the horizontal swing rotary cycle of the screen body 10. The detection method is simple and reliable, which can avoid the false judgment and missed judgment of the screen body 10 sliding and improve the safety of the equipment operation.

[0051] As a specific structural mode of the detection plate 33, the top surface of the detection plate 33 is a spherical surface with a center upwardly protruding. The spherical center of the spherical surface is aligned with the distance measuring sensor 32 in the vertical direction, and the radius of the spherical surface is equal to the vertical distance from the center of the spherical surface to the lifting point 100.

[0052] Since the screen body 10 is suspended by the equal-length lifting rods at four corners and performs horizontal swing rotary motion, the horizontal swing track thereof is a spherical surface with the lifting point 100 as the center and the length of the lifting rod as the radius. The higher the driving force of the drive box 11 on the screen body 10, the larger the swing amplitude will be, and the larger the inclination angle of the lifting rod will be. Therefore, the overall height of the screen body 10 will also increase. Different swing amplitudes correspond to different heights of the screen body 10. Since the connecting frame 31 is fixedly connected with the feed frame 20, the relative vertical distance between the distance measuring sensor 32 and the detection plate 33 fixedly arranged on the feed frame 20 will change with the change of the swing amplitude of the screen body 10. In order to avoid missed judgment, the threshold range of the distance measuring sensor 32 can only be enlarged. However, this may cause the problem that the sliding of the screen body 10 cannot be detected in time and the machine stops lagging, thereby increasing the safety hazard. In order to avoid this situation and improve the detection accuracy and the timeliness of the sliding response stop, the detection plate 33 is designed as a spherical surface with a center protruding. The spherical surface is parallel to the track of the screen body 10 within the range of any swing amplitude, so as to offset the interference of the swing amplitude of the screen body 10 on the vertical distance between the distance measuring sensor 32 and the detection plate 33.

[0053] Specifically, the detection plate 33 can be combined with the distance measuring sensor 32. Figure 3It is understood that the center of the spherical surface is located directly below the distance measuring sensor 32, and the radius R of the spherical surface is equal to the vertical distance L between the center M of the spherical surface (when the screen body 10 is in a stationary state) and the plane O where the lifting point 100 is located. The vertical distance between the area covered by the spherical surface and the turning motion track of the screen body 10 at different yaw amplitudes is always consistent. For example, if the length of the screen body 10 is L (assuming that the height of the connection point between the lifting rod and the screen body 10 is consistent with the height of the center of the spherical surface), during the overall yawing motion of the screen body 10, no matter how the swing amplitude of the detection plate 33 fixed to the top wall of the screen body 10 changes, the point M directly below the spherical surface is always a fixed value between the sensing end N of the distance measuring sensor 32. That is, when the yaw amplitude of the screen body 10 increases and causes the overall height of the screen body 10 to increase, the height of the position on the spherical surface corresponding to the point directly below the distance measuring sensor 32 decreases compared to the center of the spherical surface, and does not change compared to the distance measuring sensor 32, thereby avoiding the phenomenon that the distance measuring sensor 32 is misjudged and causes shutdown due to the change of the yaw amplitude of the screen body 10.

[0054] As a variant structure of the above-mentioned detection plate 33, please refer to Figure 4 and Figure 5 The detection plate 33 is formed as a long strip plate extending in the longitudinal direction. On this basis, the connecting frame 31 is connected with a sliding block 34 sliding in the longitudinal direction, and the sliding block 34 is connected with the two ends of the detection plate 33 through elastic ropes 35, and the distance measuring sensor 32 is arranged on the sliding block 34. When the screen body 10 is driven by the driving box 11 to yaw and rotate, the sliding block 34 moves in the direction opposite to the longitudinal swing direction of the screen body 10 under the traction of the detection plate 33.

[0055] Since the screen body 10 may only slightly deviate when one of the lifting points 100 is loose, the deviation in the middle region of the screen body 10 is very small and thus difficult to be detected in time, which may cause misjudgment. Therefore, the long detection plate 33 and the distance measuring sensor 32 reciprocating in the longitudinal direction can realize the inspection and detection between the two lifting points 100 of the screen body 10, so as to detect the positions close to the lifting points 100 and improve the detection accuracy, thereby avoiding the misjudgment of the screen body 10 falling and ensuring the safe operation of the equipment.

[0056] Since the detection plate 33 can drive the sliding block 34 to reciprocate in the longitudinal direction based on the movement of the screen body 10 through the elastic ropes 35, it is not necessary to additionally configure a driving member for the sliding block 34, which not only can reduce the cost and the installation space, but also can make the distance measuring sensor 32 connected to the sliding block 34 move to a position closer to the end of the detection plate 33, i.e., the longitudinal limit position of the distance measuring sensor 32 is closer to the lifting point 100, thereby improving the accuracy and reliability of the detection of the screen body 10 falling.

[0057] The elastic rope 35 can be guided by the guide wheels 3111 arranged at the ends of the connecting frame 31, so that the detection plate 33 can pull the slider 34 in the opposite direction, and the elastic force of the elastic rope 35 can drive the slider 34 to vibrate forcibly under the driving of the detection plate 33. When the natural frequency of the forced vibration and the circular frequency of the driving force are consistent, the output amplitude is maximum. Therefore, when the rotating speed of the screen body 10 is matched with the combination structure of the slider 34 and the elastic rope 35, the reciprocating distance of the slider 34 is maximized, so that the distance sensor 32 can detect the position closer to the hanging point 100, and the accuracy of the screen body 10 sliding detection is improved.

[0058] In the embodiment, please refer to Figure 4 , the connecting frame 31 includes two fixed seats 311, two sliding rods 312, two screw rods 313, two first driving members 314, and two thrust blocks 315. The two fixed seats 311 are longitudinally aligned and fixedly connected with one of the feed frames 20, respectively. The two fixed seats 311 are provided with guide wheels 3111 suitable for the elastic rope 35 to pass through. The two sliding rods 312 are transversely spaced and longitudinally slidably arranged in the slider 34. The two ends of the sliding rod 312 are fixed with one of the feed frames 20, respectively. The two screw rods 313 are arranged on the transverse sides of the slider 34, and the two ends of the screw rod 313 are rotatably connected with one of the fixed seats 311, respectively. The two first driving members 314 are arranged on one of the fixed seats 311, respectively, and the output ends thereof are connected with one of the screw rods 313, respectively. The two first driving members 314 are electrically connected with the controller, respectively. The two thrust blocks 315 are screwedly connected with one of the screw rods 313, respectively, and slidably connected with the two sliding rods 312. The two thrust blocks 315 are arranged on the longitudinal sides of the slider 34, respectively.

[0059] The first driving member 314 can be an electric motor. The rotation of the screw rod 313 driven by the two first driving members 314 can drive the thrust block 315 to move along the sliding rod 312, so as to drive the slider 34 to reciprocate by the pushing force of the two thrust blocks 315. This structure is mainly used for the self-detection of the screen body 10 before the screening action of the high flat screen starts. At this time, the screen body 10 is in a static state, and the distance sensor 32 can only detect the distance value at the middle position of the detection plate 33. However, if the screen body 10 is loosened or slightly slides at a corner, the detection plate 33 in the middle region will not be greatly lowered (at least half of the lowering amplitude at the hanging position), so that the detection is likely to be missed. Therefore, by running the above self-detection process of the screen body 10, the distance sensor 32 can detect the distance close to the hanging point 100, so as to accurately determine whether the screen body 10 slides, improve the detection reliability, and ensure the safety of the high flat screen.

[0060] After the screen body 10 slides down and the self-checking is completed, the two thrust blocks 315 can be driven by the first driving member 314 to move away from the sliding block 34, or can be gradually driven away from the sliding block 34 by the motor under the movement of the screen body 10, so that the movement range of the sliding block 34 under the driving of the detection plate 33 is gradually increased, which helps to improve the stability of the movement of the sliding block 34 under the driving of the detection plate 33, and after the screen body 10 starts to normally swing and rotate, the reciprocating movement of the sliding block 34 is no longer dependent on the first driving member 314, which can reduce the wear of the first driving member 314 and the screw rod 313 and improve the service life.

[0061] It should be noted that, as shown in Figure 5 , the two thrust blocks 315 are each provided with a first permanent magnet 3151, and the sliding block 34 is provided with a second permanent magnet 341, and the two first permanent magnets 3151 repel the second permanent magnet 341. The magnetic repulsion is formed between the first permanent magnet 3151 and the second permanent magnet 341, which can provide buffer limiting for the movement of the sliding block 34, avoid overloading and damage of the elastic rope 35, and affect the service life, and on the other hand, the magnetic repulsion can improve the driving force of the sliding block 34 after reversing at the limit position, thereby improving the sliding speed of the sliding block 34 on the slide rod 312, and further improving the limit distance of the sliding block 34 on the slide rod 312, i.e. improving the reciprocating movement range of the sliding block 34, so that the detection position of the distance measuring sensor 32 is closer to the screen body suspension point, and the accuracy and reliability of the screen body 10 sliding detection are improved.

[0062] In a possible implementation, please refer to Figure 5 , the bottom of the detection plate 33 is longitudinally spaced apart and provided with two telescopic support seats 36, the two telescopic support seats 36 are connected with the top wall of the screen body 10, and the second driving member 37 is arranged between the two telescopic support seats 36, and the second driving member 37 is fixed on the top wall of the screen body 10 and the output end is connected with the detection plate 33.

[0063] The top wall of the screen body 10 is relatively low when the screen body 10 is in a static state because the boom is in a suspended state, and the top wall of the screen body 10 is relatively high when the screen body 10 swings and rotates because the boom is in an inclined state. Based on this situation, assuming that the height of the detection plate 33 is the initial height when the screen body 10 is static, the detection plate 33 can be pulled down by the second driving member 37 when the screen body 10 swings, so as to reduce the distance between the detection plate 33 and the top wall of the screen body 10, and the absolute height of the detection plate 33 is still equal to the initial height, i.e. the distance between the detection plate 33 and the sensing end of the distance measuring sensor 32 is the same in the static state and the moving state, so as to improve the detection accuracy of the distance measuring sensor 32, and further improve the accuracy and reliability of the screen body 10 sliding detection.

[0064] Specifically, the second drive component 37 can be an electric push rod with controllable telescopic size to meet the needs of adjusting the size between the detection plate 33 and the top wall of the screen body 10 under different swing amplitudes, thereby improving adaptability.

[0065] In some embodiments, such as Figure 6 As shown, each composite clamping mechanism 40 includes two composite clamping components 400, which are respectively fixed to the lateral two-sided edges of one of the screen boxes 12.

[0066] Among them, see Figures 7 to 10 Each composite clamping component 400 includes a housing 41, two pressing rods 42, two worm gears 43, two worms 44, and two third driving components 45. The housing 41 is fixedly connected to the top wall of the screen box 12. The two pressing rods 42 are slidably connected to the housing 41 in the vertical direction and are spaced apart in the longitudinal direction. One end of each pressing rod 42 is inserted downward into the screen box 12 to form a pressing output end, and the other end of the pressing rod 42 is inserted upward out of the housing 41 to form a first operating end 421. The two worm gears 43 are rotatably connected to the housing 41 and are sleeved on one of the pressing rods 42, and the worm gears 43 and the pressing rods 42 are threaded together. The two worms 44 are rotatably connected to the housing 41 and mesh with one of the worm gears 43 respectively. The two third driving components 45 are disposed in the housing 41 and are electrically connected to the controller respectively. The output ends of the two third driving components 45 are connected to the two worms 44 respectively.

[0067] Since the pressure bar 42 outputs pressure by moving up and down, it has a large adjustable range. Especially for situations where the screen grid 121 needs to be disassembled and replaced, it can maximize the release of the height space of the screen box 12, so that the screen grids 121 can have a larger gap, thereby reducing the difficulty of disassembling and replacing the screen grids 121.

[0068] Each composite clamping component 400 has two pressure rods 42 forming a pressure output end, thus each composite clamping mechanism 40 has four pressure output ends corresponding to the four corners of the sieve grid 121. The pressure sensor 50 can be set at the lower end of the pressure rod 42. When the pressure detection value is lower than the threshold and it is determined that the clamping is loose, the third driving component 45 (specifically a motor) corresponding to the pressure detection value drives the worm gear 44 to rotate, and then drives the worm wheel 43 to rotate through the worm gear 44. Then, based on the threaded engagement relationship between the worm wheel 43 and the pressure rod 42, the pressure rod 42 is driven to rotate and move downward, thereby increasing the pressure of the pressure rod 42 on the sieve grid 121 until it returns to the threshold range. This realizes the automatic adjustment of the output pressure based on the pressure detection value, avoiding the problem of material leakage caused by the failure to detect or adjust the loosening of the sieve grid 121 in time.

[0069] In order to avoid the problem that the compression force cannot be adjusted due to the failure of the third driving member 45 or the transmission, the upper end of the pressing rod 42 can be extended out of the shell 41 to form a first operation end 421, and the worker can use a wrench to clamp the first operation end 421 for rotation. Since the transmission between the worm gear 43 and the worm 44 has self-locking property, the worm gear 43 cannot rotate, so rotating the pressing rod 42 can realize the up-down movement of the pressing rod 42, thereby adjusting the output pressing force.

[0070] It should be noted that, referring to Figure 9 and Figure 10 , the composite compression member 400 further comprises a first sleeve 46, a second sleeve 47, and an operating rod 48. The first sleeve 46 is rotationally connected in the shell 41 and is longitudinally slidingly fitted with the shell 41. The first sleeve 46 is sleeved with a first gear 461, and the first gear 461 is engaged with a second gear 441 sleeved on one of the worms 44. One end of the first sleeve 46 is extended out of the shell 41 to form a second operation end 462. The second sleeve 47 is rotationally connected in the shell 41 coaxially with the first sleeve 46. The second sleeve 47 is sleeved with a third gear 471, and the third gear 471 is engaged with a fourth gear 442 sleeved on the other worm 44. The second sleeve 47 has a polygonal hole section 472. One end of the operating rod 48 is slidingly provided in the second sleeve 47 and is provided with a polygonal column 481. The other end of the operating rod 48 is extended through the first sleeve 46 and out of the second operation end 462 to form a third operation end 482.

[0071] Rotating the second operation end 462 can rotate the first sleeve 46 and the first gear 461 together and drive the second gear 441 to rotate, thereby rotating one of the transmission rods and driving the driving wheel to rotate, thereby realizing manual adjustment of the output pressure of the corresponding pressing rod 42. Rotating the third operation end 482 can drive the second sleeve 47 to rotate through the operating rod 48, thereby driving the other transmission rod to rotate through the power transmission of the third gear 471 and the fourth gear 442, thereby realizing manual adjustment of the output pressure of the other pressing rod 42. Since the first sleeve 46 and the operating rod 48 extend horizontally, the second operation end 462 and the third operation end 482 can be extended horizontally out of the shell 41 to the edge of the screen box 12 in this embodiment, thereby facilitating manual operation and adjustment of the pressure by the operator. Compared with the first operation end 421 located at the top of the screen box 12 and extending upward, the operator needs to climb to the top wall of the screen box 12 during operation, which can greatly reduce the operation difficulty of manual adjustment.

[0072] The first sleeve 46 has a first transmission connection state of sliding to engage the first gear 461 and the second gear 441, and has a first transmission interruption state of sliding to separate the first gear 461 and the second gear 441; the operating rod 48 has a second transmission connection state of sliding to plug the polygonal column 481 and the polygonal hole segment 472, and has a second transmission interruption state of sliding to separate the polygonal column 481 and the polygonal hole segment 472.

[0073] Since the manual operation is a backup adjustment means in the case of failure of the third driving member 45, the first sleeve 46 and the shell 41 are in a sliding fit mode, the engagement and separation state of the first gear 461 and the second gear 441 can be switched by sliding the first sleeve 46, that is, the first transmission connection state and the first transmission interruption state are switched, and under normal circumstances, only the first transmission interruption state needs to be maintained, which can reduce the invalid wear of the first gear 461 and the second gear 441, and can avoid the influence of the transmission connection between the first gear 461 and the second gear 441 on the power transmission efficiency of the driving member to the pressing rod 42; when the third driving member 45 fails, the first transmission connection state is switched to rotate the second operating end 462 to manually adjust the pressure of the corresponding pressing rod 42.

[0074] Similarly, when the polygonal column 481 is inserted into the polygonal hole segment 472, the rotary power of the operating rod 48 can be transmitted to the second sleeve 47, so that the switching between the second transmission connection state and the second transmission interruption state can be realized by pushing and pulling the operating rod 48, and under normal circumstances, only the second transmission interruption state needs to be maintained, which can avoid the influence of the rotation of the operating rod 48 with the second sleeve 47 on the power transmission efficiency of the driving member to the pressing rod 42; when the third driving member 45 fails, the second transmission connection state is switched to rotate the third operating end 482 to manually adjust the pressure of the corresponding pressing rod 42.

[0075] Specifically, referring to Figure 9 The end of the first sleeve 46 extending into the shell 41 is provided with a first stop table 463, and the first sleeve 46 is sleeved with a first elastic member 464, one end of the first elastic member 464 abuts against the first stop table 463, and the other end is connected with the shell 41; the part of the operating rod 48 between the first sleeve 46 and the second sleeve 47 is provided with a second stop table 483, and the operating rod 48 is sleeved with a second elastic member 484, one end of the second elastic member 484 abuts against the second stop table 483, and the other end is connected with the shell 41; wherein the first sleeve 46 maintains the first transmission interruption state under the pushing action of the first elastic member 464, and the operating rod 48 maintains the second transmission interruption state under the pushing action of the second elastic member 484.

[0076] The first elastic member 464 and the second elastic member 484 can be springs, and the first elastic member 464 forms an elastic thrusting force between the first stop platform 463 and the inner wall (or other rib plate) of the shell 41, so that the first sleeve 46 is kept in the first transmission interruption state, and the first gear 461 and the second gear 441 are prevented from colliding during the operation of the device; when manual pressure adjustment is needed, the first gear 461 and the second gear 441 can be engaged by overcoming the elastic force of the first elastic member 464 to pull the first sleeve 46, so as to switch to the first transmission connection state; similarly, the second elastic member 484 forms an elastic thrusting force between the second stop platform 483 and the inner wall (or other rib plate) of the shell 41, so that the operating rod 48 is kept in the second transmission interruption state, and the polygonal column 481 can be inserted into the polygonal hole segment 472 by overcoming the elastic force of the second elastic member 484 to push the operating rod 48 when manual pressure adjustment is needed, so as to switch to the second transmission connection state, which is simple and convenient to operate.

[0077] It should be understood that, in the embodiment, since the operating rod 48 extends out of the second operating end 462 through the first sleeve 46, when the second operating end 462 needs to be rotated to manually adjust the pressure of the corresponding pressing rod 42, the first sleeve 46 can be made to realize the engagement of the first gear 461 and the second gear 441 in the sliding process by pulling the second operating end 462 outward, and when the third operating end 482 needs to be rotated to manually adjust the pressure of the corresponding pressing rod 42, the operating rod 48 can be made to realize the insertion of the polygonal column 481 and the polygonal hole segment 472 in the sliding process by pushing the third operating end 482 inward, so as to avoid the interference problem between the second operating end 462 and the third operating end 482.

[0078] It should be noted that, as shown in Figure 1 In the embodiment, the sound and light alarm 600 is arranged on the screen body 10 and electrically connected with the controller. When the screen body 10 is detected to slide by the sliding detection mechanism 30, the controller feeds back a detection signal to make the sound and light alarm 600 issue a sound and light alarm to remind the staff to handle in time; in addition, when the composite pressing mechanism 40 detects that the screen grid 121 is loose and the pressure detection value exceeds the set time pressure detection value and still does not recover to the set threshold range, it can be considered that the automatic adjustment function of the composite pressing mechanism 40 is faulty, at this time, the controller also controls the sound and light alarm 600 to issue an alarm to remind the staff to manually press the screen grid 121, so as to avoid the material from leaking due to the loosening of the screen grid 121.

[0079] The above only describes the preferred embodiments of the present application and should not be used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. High square flat sieve, characterized in that, The utility model relates to a kind of screening machine, including: Screening body, four hanging points are suspendedly installed in the same horizontal plane, the middle part of the screening body is equipped with drive box, the both sides of the drive box are with a row of screening box, and each screening box is stacked with multiple layers of screen grid upwards and downwards; Two feeders are located above the two rows of screening boxes respectively, and are fixedly connected with at least one hanging point, and each feeder is provided with a plurality of feed cloth bags connected with each screening box below respectively; Two slide detection mechanisms are respectively arranged above the lateral two side edges of the screening body, and are connected with at least one feeder, and the two slide detection mechanisms are respectively used to detect the vertical distance between each and the top wall of the screening body; A plurality of composite pressing mechanisms are respectively arranged on the top wall of each screening box, each composite pressing mechanism has four pressure output ends vertically extending into the screening box, the four pressure output ends are respectively arranged at the corner positions of the top layer of screen grid, and a pressure sensor is arranged on each pressure output end; A controller is electrically connected with the drive box, the slide detection mechanism and each composite pressing mechanism respectively, the controller is used to obtain the distance detection value of the slide detection mechanism, and the drive box is controlled to stop when the distance detection value exceeds the threshold value, the controller is also used to obtain the pressure detection value of each pressure sensor, and the corresponding composite pressing mechanism is controlled to adjust the pressure of the pressure output end when the pressure detection value exceeds the threshold value; The slide detection mechanism includes: A connecting frame is fixedly connected with two feeders at both ends respectively; A distance measuring sensor is arranged on the connecting frame with sensing end downward; A detection plate is arranged on the top wall of the screening body and located below the distance measuring sensor; The distance measuring sensor is used to detect the vertical distance between the sensing end and the detection plate to obtain the distance detection value; The detection plate extends longitudinally to form a long strip plate, a sliding block is slidably connected on the connecting frame longitudinally, the sliding block is connected with both ends of the detection plate through elastic ropes, and the distance measuring sensor is arranged on the sliding block; 2. The high square planter of claim 1, wherein, When the screening body rotates under the driving of the drive box, the sliding block moves in the direction opposite to the longitudinal swing direction of the screening body under the traction of the detection plate.

3. The high square planter of claim 1, wherein, The top surface of the detection plate is a spherical surface with the center upwardly protruding, the center of the spherical surface is vertically aligned with the distance measuring sensor, and the radius of the spherical surface is equal to the vertical distance from the center of the spherical surface to the hanging point. The connecting frame includes: Two fixed seats are longitudinally aligned and fixedly connected with one of the feeders respectively, and a guide wheel is arranged on both fixed seats and adapted to be passed through by the elastic rope; Two slide rods are transversely spaced and longitudinally slidably arranged in the sliding block, and both ends of the slide rod are fixed with one of the feeders respectively; Two screw rods are arranged on the lateral sides of the sliding block, and both ends of the screw rod are rotatably connected with one of the fixed seats respectively. Two first driving members are respectively arranged on one of the fixing seats, and output ends thereof are respectively connected with one of the screw rods, and the two first driving members are electrically connected with the controller; Two thrust blocks are respectively screw-connected with one of the screw rods, and are slidably connected with the two slide rods, and the two thrust blocks are respectively located on the longitudinal two sides of the slide block.

4. The high square planter of claim 3, wherein, First permanent magnets are arranged on the two thrust blocks, a second permanent magnet is arranged on the slide block, and the two first permanent magnets repel the second permanent magnet.

5. The high square planter of claim 1, wherein, Two telescopic supporting seats are longitudinally and spacedly arranged at the bottom of the detection plate, the two telescopic supporting seats are connected with the top wall of the screening body, a second driving member is arranged between the two telescopic supporting seats, the second driving member is fixed on the top wall of the screening body and the output end thereof is connected with the detection plate.

6. The high square planter of claim 1, wherein, Each composite pressing mechanism comprises two composite pressing members which are respectively fixed on the transverse two side edges of one of the screening boxes, wherein each composite pressing member comprises: an outer shell which is fixedly connected with the top wall of the screening box; two pressing rods which are respectively and vertically slidably connected in the outer shell and are longitudinally spaced, one end of each pressing rod penetrates into the screening box downward to form a pressing output end, and the other end of the pressing rod penetrates out of the outer shell upward to form a first operation end; two worm gears which are respectively and rotatably connected in the outer shell and are sleeved on one of the pressing rods, and the worm gears are threadedly matched with the pressing rods; two worm rods which are rotatably connected in the outer shell and are respectively engaged with one of the worm gears; two third driving members which are arranged in the outer shell and are electrically connected with the controller, and output ends of the two third driving members are respectively connected with the two worm rods.

7. The high square planter of claim 6, wherein, The composite pressing member further comprises: a first sleeve which is rotatably connected in the outer shell and is longitudinally and slidably matched with the outer shell, a first gear is sleeved on the first sleeve, the first gear is engaged with a second gear which is sleeved on one of the worm rods, one end of the first sleeve penetrates out of the outer shell to form a second operation end; a second sleeve which is rotatably connected in the outer shell and is coaxial with the first sleeve, a third gear is sleeved on the second sleeve, the third gear is engaged with a fourth gear which is sleeved on the other worm rod, and the second sleeve has a polygonal hole section; an operation rod which has one end slidably penetrating in the second sleeve and provided with a polygonal column, and the other end penetrates through the first sleeve and extends out of the second operation end to form a third operation end; wherein the first sleeve has a first transmission connection state of sliding to the engagement of the first gear and the second gear, and has a first transmission interruption state of sliding to the disengagement of the first gear and the second gear; the operation rod has a second transmission connection state of sliding to the plug-in matching of the polygonal column and the polygonal hole section, and has a second transmission interruption state of sliding to the disengagement of the polygonal column and the polygonal hole section.

8. The high square planter of claim 7, wherein, The first sleeve is provided with a first stop table at one end extending into the shell, and a first elastic member is sleeved on the first sleeve, one end of the first elastic member abuts against the first stop table, and the other end is connected with the shell; the operating rod is provided with a second stop table at a part between the first sleeve and the second sleeve, and a second elastic member is sleeved on the operating rod, one end of the second elastic member abuts against the second stop table, and the other end is connected with the shell; wherein the first sleeve keeps the first transmission interrupted state under the thrusting action of the first elastic member, and the operating rod keeps the second transmission interrupted state under the thrusting action of the second elastic member.

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