A high-safety visual maintenance sealing device for a belt conveyor material guide chute

Abstract

The application provides a high-safety visual maintenance sealing device for a belt conveyor guide chute in the technical field of belt conveyors. When the conveying belt is moving, the main control magnetic column pushes the main control mechanism and the ejection magnetic ring to move upward, so that the ejection magnetic ring pushes the speed reduction rolling ball to enter the lower side of the pressing disc and the upper surface of the delay slide rail. When the conveying belt stops, if the main control magnetic column is out of the range of action with the ejection magnetic ring and the driven magnetic plate, after all the speed reduction rolling balls completely fall, the main control mechanism can normally move downward to drive the protective lock frame to move inward, thereby releasing the fixing of the maintenance door cover. When the conveying belt stops at the position where the main control magnetic column is blocked by the avoidance position turn buckle or the main control magnetic column is separated from the avoidance position turn buckle, the main control magnetic column is also out of the range of action with the ejection magnetic ring and the driven magnetic plate, and the main control mechanism can normally fall, so that the maintenance door cover is automatically locked during the movement of the conveying belt, and the safety is effectively improved.

Description

Technical Field

[0001] This application relates to the field of belt conveyor technology, and in particular to a highly secure visual inspection and sealing device for belt conveyor guide troughs. Background Technology

[0002] Belt conveyors are short for belt conveyors. They come in stationary and mobile types, are simple in structure, and highly efficient. They are continuous conveying machines that use flexible conveyor belts as material-carrying and traction components. Guide troughs are mainly used on belt conveyors such as the DT2 or YM96 series. By installing guide troughs at the receiving point of the belt conveyor, the material falling from the hopper can be concentrated in the middle of the conveyor belt before reaching the belt speed, thus preventing the material from spilling outwards.

[0003] For some materials, the conveyor belt chute needs to be equipped with a sealed material bin to improve safety. However, many accidents still occur due to misoperation. Usually, the bin door is opened to check or perform maintenance before the conveyor stops, which causes material to splash or operators to fall in, resulting in very serious personal safety hazards.

[0004] Therefore, it is necessary to design a conveyor belt guide chute maintenance sealing device that can tightly lock the chute door when the conveyor belt is moving and can only be unlocked when the conveyor belt stops. Summary of the Invention

[0005] The purpose of this application is to improve the safety of observation and maintenance of belt conveyor guide chutes. Compared with the prior art, it provides a highly safe visual maintenance sealing device for belt conveyor guide chutes. The device involves setting up a guide chute with a conveyor belt installed on its upper inner end and an outer sealing chamber installed on its outer end. A mounting base plate is installed on the upper end of the outer sealing chamber, and external control mechanisms are installed at both ends of the mounting base plate. The external control mechanisms include a main control outer cylinder fixedly connected to the mounting base plate, an external control cavity opened on the lower inner end of the main control outer cylinder, a support ring fixedly connected to the middle of the outer control cavity, a delay slide rail fixedly connected to the inner end of the support ring, multiple speed-reducing balls sliding on the upper end of the delay slide rail, speed-limiting ports opened on both the front and rear inner ends of the delay slide rail, a catapult magnetic ring slidably engaged at the inner end of the outer control cavity, and a speed-reducing mechanism installed at the inner end of the main control outer cylinder. The speed-reducing mechanism includes components connected to the main control outer cylinder... The upper inner end is fixedly connected to the main control inner cylinder, and the inner end of the main control inner cylinder has a sliding inner groove. The inner end of the sliding inner groove is equipped with the main control mechanism. The main control mechanism includes a sliding bracket that slides and engages with the inner end of the sliding inner groove. The inner end of the sliding bracket is fixedly connected to the connecting main shaft. The upper end of the connecting main shaft is fixedly connected to the control frame. The upper end of the control frame is rotatably connected to a pair of control rods. The outer end of the control rods is rotatably connected to a protective lock frame. The lower outer end of the connecting main shaft is fixedly connected to a pressure plate. The lower end of the connecting main shaft is fixedly connected to a driven magnetic plate. The upper end of the mounting base is rotatably connected to a maintenance door cover. The lower ends of both the front and rear sides of the maintenance door cover are provided with a pair of protective lock slots corresponding to the protective lock frame. The upper ends of both the front and rear sides of the guide chute are provided with multiple main control magnetic columns at equal intervals, so as to automatically lock the maintenance door cover during the movement of the conveyor belt, effectively improving safety.

[0006] Furthermore, an observation panel is installed inside the inspection door cover. The observation panel is made of acrylic sheet, which facilitates observation or maintenance from the outside.

[0007] Furthermore, the outer end of the protective lock opening is slidably engaged with the outer end of the protective lock frame, and the inner end of the protective lock opening is longer than the inner end of the protective lock frame. The protective lock frame is also slidably engaged with the mounting base plate, which allows the protective lock opening and the protective lock frame to be precisely fixed while preventing the protective lock frame from shifting.

[0008] Furthermore, the magnetic field of the main control magnetic column is repulsive to the magnetic fields of the ejector magnetic ring and the driven magnetic plate, and the force between the main control magnetic column and the ejector magnetic ring is less than the force between the main control magnetic column and the driven magnetic plate. The main control magnetic column can push the ejector magnetic ring and the driven magnetic plate upward, and can ensure that the driven magnetic plate reaches the top before the ejector magnetic ring.

[0009] Furthermore, the distance between the outer end of the pressure plate and the inner end of the main control outer cylinder, and the distance between the outer end of the driven magnetic plate and the inner end of the main control outer cylinder are both smaller than the outer diameter of the deceleration ball. In the protective state, the middle end of the pressure plate is at the same height as the upper end of the inner side of the outer control cavity, and the upper end of the driven magnetic plate is at the same height as the lower end of the inner side of the outer control cavity. This can prevent the deceleration ball from falling out of the range of the outer control mechanism, the deceleration mechanism, and the main control mechanism, and ensure that the deceleration ball can circulate normally.

[0010] Furthermore, when the deceleration ball is located at the upper end of the delay slide rail, the innermost end of the deceleration ball is located inside the outermost end of the pressure plate, and the outer diameter of the pressure plate is equal to the inner diameter of the delay slide rail, which can accurately fix the entire main control mechanism through the deceleration ball.

[0011] Furthermore, the delay slide rail has a symmetrical structure, with the middle of the left and right sides of the delay slide rail being higher than the front and rear ends. The lowest point of the delay slide rail is located at the middle of the front and rear sides, which allows the deceleration balls to fall from the speed limit port in sequence, thereby slowing down the overall descent of the main control mechanism.

[0012] Furthermore, a speed-reducing cavity is provided inside the main control inner cylinder, and multiple speed-reducing through holes connected to the sliding inner groove and the speed-reducing cavity are provided at equal angles at both ends of the sliding inner groove. Hydraulic oil is filled between the sliding inner groove and the outer end of the sliding bracket, as well as inside the speed-reducing cavity. The number and inner diameter of the speed-reducing through holes on the upper side are larger than those on the lower side, which allows the main control mechanism to fall slowly when it reaches the top, allowing the circulating speed-reducing balls to smoothly enter the lower side of the pressure plate and preventing any speed-reducing balls from entering the upper side of the pressure plate.

[0013] Furthermore, a pair of rotating platforms fixedly connected to the guide chute are provided on the lower left side of the external control mechanism. A positioning buckle is rotatably connected to the upper end of the rotating platform. The positioning buckle is located on the moving path of the main control magnetic column, and a torsion spring is installed at the rotatable connection between the positioning buckle and the rotating platform. This spring can obstruct the main control magnetic column and prevent the main control magnetic column from being within the range of force that can be generated by the ejector magnetic ring and the driven magnetic plate when the conveyor belt stops.

[0014] Furthermore, multiple avoidance rails are slidably engaged at both the front and rear ends of the upper side of the guide chute. The avoidance rails are installed on the upper end of the conveyor belt. The inner end of the avoidance rail is slidably engaged with a sliding base plate that is fixedly connected to the lower end of the main control magnetic column. An avoidance spring is installed between the left end of the sliding base plate and the inner surface of the left end of the avoidance rail. The maximum elastic force of the avoidance spring is less than the minimum rotational thrust of the avoidance buckle. Under normal conditions, the sliding base plate and the main control magnetic column are located at the rightmost side of the avoidance rail. This ensures that when the conveyor belt stops, if the main control magnetic column gets rid of the obstruction of the avoidance buckle, the main control magnetic column will return to the right in time, thereby leaving the range of action of the ejector magnetic ring and the driven magnetic plate.

[0015] Compared to existing technologies, the advantages of this application are:

[0016] (1) The maintenance door cover is automatically locked during the conveyor belt movement, which effectively improves safety.

[0017] (2) An observation plate is installed on the inner end of the inspection door cover. The observation plate is made of acrylic sheet, which facilitates observation or maintenance from the outside.

[0018] (3) The outer end of the protective lock opening is slidably engaged with the outer end of the protective lock frame, and the inner end of the protective lock opening is longer than the inner end of the protective lock frame. The protective lock frame is also slidably engaged with the mounting base plate, which allows the protective lock opening and the protective lock frame to be precisely fixed while preventing the protective lock frame from shifting.

[0019] (4) The magnetic field of the main control magnetic column is repulsive to the magnetic fields of the ejector magnetic ring and the driven magnetic plate. The force between the main control magnetic column and the ejector magnetic ring is less than the force between the main control magnetic column and the driven magnetic plate. The main control magnetic column can push the ejector magnetic ring and the driven magnetic plate upward, and can ensure that the driven magnetic plate reaches the top before the ejector magnetic ring.

[0020] (5) The distance between the outer end of the pressure plate and the inner end of the main control outer cylinder, and the distance between the outer end of the driven magnetic plate and the inner end of the main control outer cylinder are both smaller than the outer diameter of the deceleration ball. In the protective state, the middle end of the pressure plate and the upper end of the inner side of the outer control cavity are at the same height, and the upper end of the driven magnetic plate and the lower end of the inner side of the outer control cavity are at the same height. This can prevent the deceleration ball from falling out of the range of the outer control mechanism, the deceleration mechanism, and the main control mechanism, and ensure that the deceleration ball can circulate normally.

[0021] (6) When the deceleration ball is located at the upper end of the delay slide rail, the innermost end of the deceleration ball is located inside the outermost end of the pressure plate, and the outer end diameter of the pressure plate is equal to the inner end diameter of the delay slide rail, so that the main control mechanism can be accurately fixed by the deceleration ball.

[0022] (7) The delay slide rail has a symmetrical structure, and the middle of the left and right sides of the delay slide rail is higher than the front and rear ends of the delay slide rail. The lowest point of the delay slide rail is located at the middle of the front and rear sides, which allows the deceleration rolling ball to fall from the speed limit port in sequence, thereby delaying the overall descent of the main control mechanism.

[0023] (8) A speed reduction chamber is provided inside the main control inner cylinder. Multiple speed reduction through holes connected to the sliding inner groove and the speed reduction chamber are provided at equal angles at both ends of the sliding inner groove. Hydraulic oil is filled between the sliding inner groove and the outer end of the sliding bracket and inside the speed reduction chamber. The number and inner diameter of the speed reduction through holes on the upper side are larger than those on the lower side. This allows the main control mechanism to fall slowly when it reaches the uppermost side, so that the circulating speed reduction balls can smoothly enter the lower side of the pressure plate and prevent any speed reduction balls from entering the upper side of the pressure plate.

[0024] (9) A pair of rotating platforms are fixedly connected to the guide trough on the lower left side of the external control mechanism. A positioning buckle is rotatably connected to the upper end of the rotating platform. The positioning buckle is located on the moving path of the main control magnetic column. A torsion spring is installed at the rotating connection between the positioning buckle and the rotating platform, which can obstruct the main control magnetic column and prevent the main control magnetic column from being within the range of force that can be generated with the ejector magnetic ring and the driven magnetic plate when the conveyor belt stops.

[0025] (10) Multiple avoidance slide rails are slidably engaged at both the front and rear ends of the upper side of the guide chute. The avoidance slide rails are installed at the upper end of the conveyor belt. The inner end of the avoidance slide rail is slidably engaged with a sliding base plate that is fixedly connected to the lower end of the main control magnetic column. An avoidance spring is installed between the left end of the sliding base plate and the inner surface of the left end of the avoidance slide rail. The maximum elastic force of the avoidance spring is less than the minimum rotational thrust of the avoidance turn buckle. The sliding base plate and the main control magnetic column are normally located at the rightmost side of the avoidance slide rail. This ensures that when the conveyor belt stops, if the main control magnetic column gets rid of the obstruction of the avoidance turn buckle, the main control magnetic column will return to the right in time, thereby leaving the range of action of the ejector magnetic ring and the driven magnetic plate. Attached Figure Description

[0026] Figure 1 Right view of the access cover in the open state of this application;

[0027] Figure 2 This is a left view of the access door cover in the closed state according to this application;

[0028] Figure 3 This is the main view of the outer sealing warehouse in this application;

[0029] Figure 4 This is a front sectional view of the outer sealing warehouse of this application;

[0030] Figure 5 This is a left-side view of the connection between the clearance slide rail and the sliding base plate in this application;

[0031] Figure 6 This is a front view connection diagram of the control frame and control lever of this application;

[0032] Figure 7 This is a front sectional view of the main control outer cylinder of this application;

[0033] Figure 8 This is the main view of the delay slide rail in this application;

[0034] Figure 9 This is the main view motion path diagram of the decelerated rolling ball in this application;

[0035] Figure 10 This is an exploded cross-sectional view of the connection between the main control inner cylinder and the main control mechanism in this application.

[0036] Figure 11 This is a front sectional view of the sliding card holder of this application.

[0037] Explanation of the labels in the diagram:

[0038] 1. Feed chute, 2. Outer sealing chamber, 3. Mounting base plate, 4. External control mechanism, 401. Main control outer cylinder, 402. External control cavity, 403. Support ring, 404. Delay slide rail, 405. Speed ​​limiting port, 406. Ejection magnetic ring, 5. Speed ​​reduction mechanism, 501. Main control inner cylinder, 502. Sliding inner groove, 503. Speed ​​reduction cavity, 504. Speed ​​reduction through hole, 6. Main control mechanism, 601. Sliding bracket, 602. Connecting spindle, 603. Control frame, 604. Control rod, 605. Protective lock frame, 606. Pressing plate, 607. Driven magnetic plate, 7. Speed ​​reduction ball, 8. Inspection door cover, 9. Observation plate, 10. Protective lock, 11. Main control magnetic column, 12. Avoidance slide rail, 13. Sliding base plate, 14. Avoidance spring, 15. Rotating table, 16. Avoidance buckle. Detailed Implementation

[0039] The embodiments will be described clearly and completely with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments in this application without creative effort are within the scope of protection of this application.

[0040] Example 1:

[0041] This invention provides a highly secure visual inspection and sealing device for conveyor belt guide chutes. Please refer to [link / reference]. Figure 1-11 The system includes a guide chute 1, a conveyor belt installed on the inner upper side of the guide chute 1, and an outer sealing chamber 2 installed on the outer outer side of the guide chute 1. The external control mechanism 4 includes a main control outer cylinder 401 fixedly connected to the mounting base plate 3. Speed ​​limiting ports 405 are opened on both the front and rear inner ends of the delay slide rail 404. A speed reduction mechanism 5 is installed on the inner end of the main control outer cylinder 401. The speed reduction mechanism 5 includes a main control inner cylinder 501 fixedly connected to the inner upper side of the main control outer cylinder 401. A sliding inner groove 502 is opened on the inner end of the main control inner cylinder 501. A pressure plate 606 is fixedly connected to the outer lower side of the connecting main shaft 602. A driven magnet is fixedly connected to the lower end of the connecting main shaft 602. Plate 607, multiple main control magnetic columns 11 are evenly spaced on the upper ends of the front and rear sides of the guide trough 1. The magnetic field of the main control magnetic column 11 is repulsive to the magnetic field of the ejector magnetic ring 406 and the driven magnetic plate 607. The force between the main control magnetic column 11 and the ejector magnetic ring 406 is less than the force between the main control magnetic column 11 and the driven magnetic plate 607. The main control magnetic column 11 can push the ejector magnetic ring 406 and the driven magnetic plate 607 upward, and can ensure that the driven magnetic plate 607 reaches the uppermost side before the ejector magnetic ring 406. The outer end of the pressure plate 606, the outer surface of the deceleration ball 7, and the upper surface of the delay slide rail 404 are all polished smooth.

[0042] Please see Figure 1-3An installation base plate 3 is installed on the upper end of the outer sealing chamber 2. External control mechanisms 4 are installed at the front and rear ends of the installation base plate 3. An inspection door cover 8 is rotatably connected to the upper end of the installation base plate 3. A pair of protective lock slots 10 corresponding to the protective lock frame 605 are opened on the lower ends of the front and rear sides of the inspection door cover 8. An observation plate 9 is installed on the inner end of the inspection door cover 8. The observation plate 9 is made of acrylic plate, which facilitates external observation or maintenance. The outer end of the protective lock slot 10 is slidably engaged with the outer end of the protective lock frame 605. The inner length of the protective lock slot 10 is greater than the inner length of the protective lock frame 605. The protective lock frame 605 is slidably engaged with the installation base plate 3, which can accurately fix the protective lock slot 10 and the protective lock frame 605 while preventing the protective lock frame 605 from shifting.

[0043] Please see Figure 4 On the lower left side of the external control mechanism 4, there is a pair of rotating platforms 15 that are fixedly connected to the guide trough 1. The upper end of the rotating platform 15 is rotatably connected to the avoidance buckle 16. The avoidance buckle 16 is located on the moving path of the main control magnetic column 11, and a torsion spring is installed at the rotatable connection between the avoidance buckle 16 and the rotating platform 15. This spring can obstruct the main control magnetic column 11 and prevent the main control magnetic column 11 from being within the range of force that can be generated by the ejector magnetic ring 406 and the driven magnetic plate 607 when the conveyor belt stops.

[0044] Please see Figure 4-5 Multiple avoidance slide rails 12 are slidably engaged at both the front and rear ends of the upper side of the guide chute 1. The avoidance slide rails 12 are installed at the upper end of the conveyor belt. The inner end of the avoidance slide rail 12 is slidably engaged with a sliding base plate 13 that is fixedly connected to the lower end of the main control magnetic column 11. An avoidance spring 14 is installed between the left end of the sliding base plate 13 and the inner surface of the left end of the avoidance slide rail 12. The maximum elastic force of the avoidance spring 14 is less than the minimum rotational thrust of the avoidance buckle 16. Under normal conditions, the sliding base plate 13 and the main control magnetic column 11 are located at the rightmost side of the avoidance slide rail 12. This ensures that when the conveyor belt stops, if the main control magnetic column 11 gets rid of the obstruction of the avoidance buckle 16, the main control magnetic column 11 will return to the right in time, thereby leaving the range of action of the ejector magnetic ring 406 and the driven magnetic plate 607.

[0045] Please see Figure 6-11 The inner end of the sliding inner groove 502 is equipped with a main control mechanism 6. The main control mechanism 6 includes a sliding bracket 601 that is slidably engaged with the inner end of the sliding inner groove 502. The inner end of the sliding bracket 601 is fixedly connected to a connecting spindle 602. The upper end of the connecting spindle 602 is fixedly connected to a control frame 603. The upper end of the control frame 603 is rotatably connected to a pair of control rods 604. The outer end of the control rods 604 is rotatably connected to a protective lock frame 605.

[0046] Please see Figure 7An outer control cavity 402 is provided at the lower inner end of the main control outer cylinder 401. A support ring 403 is fixedly connected to the middle of the outer control cavity 402. A delay slide rail 404 is fixedly connected to the inner end of the support ring 403. Multiple deceleration rolling balls 7 slide on the upper end of the delay slide rail 404. An ejector magnetic ring 406 is slidably engaged at the inner end of the outer control cavity 402.

[0047] Please see Figure 7-8 The delay slide rail 404 has a symmetrical structure, with the middle of the left and right sides of the delay slide rail 404 higher than the front and rear ends. The lowest point of the delay slide rail 404 is located at the middle of the front and rear sides, which allows the deceleration rolling balls 7 to fall sequentially from the speed limiting port 405, thereby slowing down the overall descent of the main control mechanism 6.

[0048] Please see Figure 7-9 The distance between the outer end of the pressure plate 606 and the inner end of the main control outer cylinder 401, and the distance between the outer end of the driven magnetic plate 607 and the inner end of the main control outer cylinder 401 are both smaller than the outer diameter of the deceleration ball 7. In the protective state, the middle end of the pressure plate 606 is at the same height as the upper end of the inner side of the outer control cavity 402, and the upper end of the driven magnetic plate 607 is at the same height as the lower end of the inner side of the outer control cavity 402. This can prevent the deceleration ball 7 from falling out of the range of the outer control mechanism 4, the deceleration mechanism 5, and the main control mechanism 6, and ensure that the deceleration ball 7 can circulate normally. When the deceleration ball 7 is located at the upper end of the delay slide rail 404, the innermost end of the deceleration ball 7 is located inside the outermost end of the pressure plate 606, and the outer diameter of the pressure plate 606 is equal to the inner diameter of the delay slide rail 404. The main control mechanism 6 can be precisely fixed by the deceleration ball 7.

[0049] Please see Figure 10 The main control inner cylinder 501 has a speed reduction cavity 503 inside. The upper and lower ends of the sliding inner groove 502 have multiple speed reduction through holes 504 that are connected to the sliding inner groove 502 and the speed reduction cavity 503 at equal angles. The sliding inner groove 502 and the outer end of the sliding bracket 601, as well as the inside of the speed reduction cavity 503, are filled with hydraulic oil. The number and inner diameter of the speed reduction through holes 504 on the upper side are larger than those on the lower side. This allows the main control mechanism 6 to fall slowly when it reaches the uppermost side, so that the circulating speed reduction ball 7 can smoothly enter the lower side of the pressure plate 606, and prevents the speed reduction ball 7 from entering the upper side of the pressure plate 606.

[0050] Please see Figure 1-11Under normal conditions, the inspection door cover 8 is fixed by the protective lock bracket 605, and the lower end of the pressure plate 606 is abutted by the deceleration ball 7. At the same time, the deceleration ball 7 is pressed and slowly moves along the upper surface of the delay slide rail 404 towards the speed limit port 405. After falling from the speed limit port 405, due to the certain inclination of the upper end of the driven magnetic plate 607, the lower inner surface of the outer control cavity 402, and the upper end of the ejector magnetic ring 406, the deceleration ball 7 will eventually enter the lower side of the outer control cavity 402 and stay on the ejector magnetic ring 406. At the top, if the conveyor belt is moving, the main control magnetic column 11 will pass under the external control mechanism 4, the speed reduction mechanism 5, and the main control mechanism 6 in sequence. The main control magnetic column 11 will push the main control mechanism 6 and the ejector magnetic ring 406 to move upward. The main control mechanism 6 will reach the top first. At the same time, because the number of speed reduction through holes 504 on the lower side is small and the inner diameter is small, the hydraulic oil will be slowly pushed into the speed reduction chamber 503, thereby slowing down the descent of the main control mechanism 6 and thus allowing the ejector magnetic ring 406 to push upward. The decelerating ball 7 normally enters the lower side of the pressure plate 606 and the upper surface of the delay slide rail 404, thus completing one cycle. If the conveyor belt continues to move, the above process is repeated. When the conveyor belt stops, if the main control magnetic column 11 is outside the range of interaction with the ejector magnetic ring 406 and the driven magnetic plate 607, after all the decelerating balls 7 have completely fallen from the delay slide rail 404 and the speed limit port 405, the main control mechanism 6 can move downward normally, thus driving the protective lock frame 605 inward. The movement unlocks the protective lock frame 605 from fixing the maintenance door cover 8, allowing the maintenance door cover 8 to be opened normally. In addition, if the conveyor belt stops when the main control magnetic column 11 is blocked by the avoidance buckle 16 or when the main control magnetic column 11 is disengaged from the avoidance buckle 16, the main control magnetic column 11 will also be outside the range of interaction with the ejector magnetic ring 406 and the driven magnetic plate 607, and the main control mechanism 6 can also fall normally. The above is a series of working principles of the safety protection of the belt conveyor maintenance sealing device.

[0051] The above description is only the best implementation method adopted in this application in combination with current practical needs, but the scope of protection of this application is not limited thereto.

Claims

1. A high-safety visual inspection and sealing device for a belt conveyor guide chute, comprising a guide chute (1), wherein a conveyor belt is installed on the upper inner end of the guide chute (1), characterized in that, An outer sealing chamber (2) is installed at the outer end of the feed trough (1). An installation base plate (3) is installed at the upper end of the outer sealing chamber (2). An external control mechanism (4) is installed at both the front and rear ends of the installation base plate (3). The external control mechanism (4) includes a main control outer cylinder (401) fixedly connected to the installation base plate (3). An external control cavity (402) is opened at the lower inner end of the main control outer cylinder (401). A support ring (403) is fixedly connected to the middle end of the external control cavity (402). An extension is fixedly connected to the inner end of the support ring (403). The delay slide rail (404) has multiple deceleration balls (7) sliding on its upper end. Speed ​​limiting ports (405) are opened on both the front and rear inner ends of the delay slide rail (404). A catapult magnetic ring (406) is slidably engaged with the inner end of the outer control cavity (402). A speed reduction mechanism (5) is installed on the inner end of the main control outer cylinder (401). The speed reduction mechanism (5) includes a main control inner cylinder (501) fixedly connected to the upper inner end of the main control outer cylinder (401). A speed limiting port (405) is opened on the inner end of the main control inner cylinder (501). A sliding inner groove (502) is provided, and a main control mechanism (6) is installed at the inner end of the sliding inner groove (502). The main control mechanism (6) includes a sliding bracket (601) that is slidably engaged with the inner end of the sliding inner groove (502). A connecting main shaft (602) is fixedly connected to the inner end of the sliding bracket (601). A control frame (603) is fixedly connected to the upper end of the connecting main shaft (602). A pair of control rods (604) are rotatably connected to the upper end of the control frame (603). The outer ends of the control rods (604) are... A protective lock frame (605) is rotatably connected. A pressure plate (606) is fixedly connected to the lower outer end of the connecting main shaft (602). A driven magnetic plate (607) is fixedly connected to the lower end of the connecting main shaft (602). An inspection door cover (8) is rotatably connected to the upper end of the mounting base plate (3). A pair of protective lock slots (10) corresponding to the protective lock frame (605) are opened on the lower ends of the front and rear sides of the inspection door cover (8). Multiple main control magnetic columns (11) are provided at equal distances on the upper ends of the front and rear sides of the guide trough (1). The magnetic field of the main control magnetic column (11) is repulsive to the magnetic fields of the ejector magnetic ring (406) and the driven magnetic plate (607), and the force between the main control magnetic column (11) and the ejector magnetic ring (406) is less than the force between the main control magnetic column (11) and the driven magnetic plate (607). The main control magnetic column (11) pushes the ejector magnetic ring (406) and the driven magnetic plate (607) upward, and the driven magnetic plate (607) reaches the uppermost side before the ejector magnetic ring (406). When the deceleration ball (7) is located at the upper end of the delay slide rail (404), the innermost end of the deceleration ball (7) is located inside the outermost end of the pressure plate (606), and the outer diameter of the pressure plate (606) is equal to the inner diameter of the delay slide rail (404). Under normal conditions, the maintenance door cover (8) is fixed by the protective lock frame (605), and the lower end of the pressure plate (606) is abutted by the deceleration ball (7). At the same time, the deceleration ball (7) is pressed and slowly moves along the upper surface of the delay slide rail (404) towards the speed limit port (405). After falling, since the upper end of the driven magnetic plate (607), the inner surface of the lower end of the outer control cavity (402), and the upper end of the ejector magnetic ring (406) all have a certain degree of inclination, the deceleration ball (7) will eventually enter the lower side of the outer control cavity (402) and stay on the upper end of the ejector magnetic ring (406). The main control magnetic column (11) will push the main control mechanism (6) as a whole and the ejector magnetic ring (406) to move upward, so that the ejector magnetic ring (406) pushes the deceleration ball (7) to normally enter the lower side of the pressure plate (606) and the upper surface of the delay slide rail (404).

2. The high-safety visual inspection and sealing device for a belt conveyor guide chute according to claim 1, characterized in that, An observation plate (9) is installed on the inner end of the inspection door cover (8), and the observation plate (9) is an acrylic plate.

3. The high-safety visual inspection and sealing device for a conveyor belt guide chute according to claim 1, characterized in that, The outer end of the protective lock opening (10) is slidably engaged with the outer end of the protective lock frame (605), and the inner length of the protective lock opening (10) is greater than the inner length of the protective lock frame (605), and the protective lock frame (605) is slidably engaged with the mounting base plate (3).

4. The high-safety visual inspection and sealing device for a belt conveyor guide chute according to claim 1, characterized in that, The distance between the outer end of the pressure plate (606) and the inner end of the main control outer cylinder (401), and the distance between the outer end of the driven magnetic plate (607) and the inner end of the main control outer cylinder (401) are both smaller than the outer diameter of the deceleration ball (7). In the protected state, the middle end of the pressure plate (606) and the upper end of the inner side of the outer control cavity (402) are at the same height, and the upper end of the driven magnetic plate (607) and the lower end of the inner side of the outer control cavity (402) are at the same height.

5. A high-safety visual inspection and sealing device for a belt conveyor guide chute according to claim 1, characterized in that, The delay slide rail (404) has a front-to-back symmetrical structure, and the middle of the left and right sides of the delay slide rail (404) is higher than the front and back ends of the delay slide rail (404), and the lowest point of the delay slide rail (404) is located at the middle of the front and back sides.

6. A high-safety visual inspection and sealing device for a conveyor belt guide chute according to claim 1, characterized in that, The main control inner cylinder (501) has a speed reduction cavity (503) inside. The upper and lower ends of the sliding inner groove (502) are provided with multiple speed reduction through holes (504) that are connected to the sliding inner groove (502) and the speed reduction cavity (503) at equal angles. The sliding inner groove (502) and the outer end of the sliding bracket (601) and the inside of the speed reduction cavity (503) are filled with hydraulic oil. The number of speed reduction through holes (504) on the upper side and the inner diameter of the holes are both larger than those on the lower side.

7. A high-safety visual inspection and sealing device for a belt conveyor guide chute according to claim 1, characterized in that, The lower left side of the external control mechanism (4) is provided with a pair of rotating platforms (15) that are fixedly connected to the guide trough (1). The upper end of the rotating platform (15) is rotatably connected to the avoidance buckle (16). The avoidance buckle (16) is located on the moving path of the main control magnetic column (11), and a torsion spring is installed at the rotatable connection between the avoidance buckle (16) and the rotating platform (15).

8. A high-safety visual inspection and sealing device for a belt conveyor guide chute according to claim 7, characterized in that, Multiple clearance slide rails (12) are slidably engaged at both ends of the upper side of the guide trough (1). The clearance slide rails (12) are installed on the upper end of the conveyor belt. The inner end of the clearance slide rail (12) is slidably engaged with a sliding base plate (13) that is fixedly connected to the lower end of the main control magnetic column (11). A clearance spring (14) is installed between the left end of the sliding base plate (13) and the inner surface of the left end of the clearance slide rail (12). The maximum elastic force of the clearance spring (14) is less than the minimum rotational thrust of the clearance buckle (16). The sliding base plate (13) and the main control magnetic column (11) are normally located on the rightmost side inside the clearance slide rail (12).

Images