A convenient material automatic passing opening and closing safety device

Abstract

The utility model discloses a kind of safety devices that facilitate material to automatically pass through opening and closing, including platform fixed cover plate and rotary grating machine, movable cover plate mechanism is equipped between the two, the grating cover plate of movable cover plate mechanism is flush with platform fixed cover plate top surface, fixed base is equipped in sewage channel both sides, rotating mechanism is equipped between fixed base, the bearing of rotating mechanism is connected with fixed base, grating cover plate is equipped above the main shaft between bearing, connecting mechanism is equipped between grating cover plate and main shaft, connecting mechanism is equipped in grating cover plate one side close to platform fixed cover plate. Realize automatic opening and closing using rake tooth self power and the gravity of grating cover plate, avoid sundries to be stuck between grating cover plate and rake tooth, reduce rake tooth deformation damage, grating cover plate normality closes, eliminate channel safety hidden danger, automatically run without manual intervention, reduce the frequency of personnel in dangerous area's patrol, improve water channel protection reliability.

Description

Technical Field

[0001] This utility model belongs to the field of safety protection technology for sewage treatment equipment, specifically relating to a safety device that facilitates the automatic passage of materials through opening and closing. Background Technology

[0002] In industrial wastewater treatment systems, rotary bar screens in the pretreatment stage are typically installed on the inlet channel. Their main function is to remove various debris (such as fibers, plastics, and stones) mixed in with the wastewater. To meet on-site safety management requirements, a cover plate needs to be installed in front of the channel for protection. However, existing technologies mostly use fixed covers, which present the following problems: 1. If the distance between the cover plate installation position and the bar screen machine is too large, there is a safety hazard and it does not comply with safety management regulations; 2. If the distance between the cover plate and the bar screen is too small, larger diameter debris can easily get stuck between the cover plate and the bar screen's rake teeth, causing the rake teeth to be overloaded, deformed, or even damaged, increasing the frequency of equipment failures and shortening their service life.

[0003] Therefore, there is an urgent need to develop a cover plate device that can automatically open and close and adaptively adjust the gap, so as to ensure the smooth passage of debris while meeting the requirements of safe equipment operation and on-site management. Utility Model Content

[0004] The purpose of this invention is to provide a convenient and automatic safety device for materials to pass through, thereby solving the above-mentioned problems.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A safety device for facilitating the automatic passage of materials through opening and closing includes a platform fixed cover and a rotary bar screen. A movable cover mechanism is provided between the platform fixed cover and the rotary bar screen. The movable cover mechanism includes a bar screen cover, a fixed base, and a rotating mechanism. The top surfaces of the bar screen cover and the platform fixed cover are on the same plane. The fixed bases are symmetrically arranged on the walls or steel structures on both sides of the sewage channel. A rotating mechanism is provided between the two fixed bases. The rotating mechanism includes a main shaft and bearings symmetrically arranged at both ends of the main shaft. The bearings are connected and fixed to the fixed bases. A bar screen cover is provided above the main shaft. A connecting mechanism is provided between the bar screen cover and the main shaft. The connecting mechanism is located on the side of the bar screen cover closer to the platform fixed cover.

[0006] To further realize this utility model, a safety mechanism is also provided on the fixed base. The safety mechanism includes a diagonal tie rod. One end of the diagonal tie rod is connected to the end face of the fixed base near the rotary bar screen machine, and the top surface of the other end of the diagonal tie rod is parallel to the platform fixed cover plate. The diagonal tie rod is made of No. 45 steel and is used to limit the angle at which the bar screen cover plate automatically descends and closes under its own weight, ensuring that the bar screen cover plate is flush with the platform fixed cover plate when closed, and avoiding excessive rotation that could cause the platform surface to tilt.

[0007] To further realize this utility model, a gap of no more than 6mm is provided between the grid cover plate and the rake teeth of the rotary grid machine.

[0008] To further realize this utility model, the connecting mechanism includes a connecting rod and a connecting plate. The connecting rod is symmetrically arranged on the main shaft, and the connecting plate is symmetrically arranged on the bottom surface of the grid cover plate. The other end of the connecting rod is fixedly connected to the center of the connecting plate, and the axis of the connecting rod is perpendicular to the connecting plate and the main shaft respectively.

[0009] To further realize this utility model, the distance between the axis of the connecting rod and the edge of the grid cover plate near the fixed cover plate of the platform is 900mm.

[0010] To further realize this utility model, the bearing adopts a square seat bearing, the main shaft passes through the square seat bearing, and shaft end retaining rings are respectively provided at both ends of the main shaft.

[0011] To further realize this utility model, the inner diameter of the bushing of the main shaft and the square seat bearing is an interference fit, with an interference amount of 0.02-0.04mm.

[0012] To further realize this utility model, the fixed base is a square structure that mates with the square seat bearing, and the fixed base is provided with bearing holes that mate with the square seat bearing.

[0013] To further realize this utility model, the insurance mechanism also includes a rubber pad disposed on the steel plate, and the steel plate and the rubber pad are disposed on the top surface of the tie rod.

[0014] The advantages of this utility model compared to the prior art are as follows: When the rotary bar screen retrieves large-diameter debris from the sewage, the rake teeth of the rotary bar screen carry the debris upwards with the bar screen. When the debris hits the bar screen cover plate provided in this utility model, the bar screen cover plate is pushed and flipped upwards with the main shaft as the axis. After the debris passes through, the bar screen cover plate automatically closes by its own gravity, realizing the adaptive adjustment of the gap between the bar screen cover plate and the rake teeth, solving the problem of debris getting stuck in the existing fixed cover plate and the safety hazards.

[0015] The fixed base is made of Q235 steel plate and is used to fix the device of this utility model to the concrete wall or steel structure on both sides of the channel as the load-bearing foundation of the device. The base has pre-set bearing holes for fixing and installing square seat bearings.

[0016] The grating cover is made of 304 stainless steel grating with a grating spacing of 6mm. It is connected to the fixed base through a main shaft and a square bearing seat, and has the freedom to rotate upward around the main shaft to open. There is an eccentricity between the geometric center of the grating cover and the axis of the main shaft, that is, the main shaft is offset from the center of gravity of the grating cover, ensuring that the grating cover can close by its own weight when there is no external force.

[0017] The spindle is made of 40Cr material, and both ends are fitted with bearing holes in the fixed base through UCFU type UCFU 209 bearings with square seats to achieve low-resistance rotation.

[0018] The connecting mechanism is located on the side of the grating cover plate near the platform fixed cover plate, ensuring that the cover plate can descend and close by its own weight when there is no external force.

[0019] Compared with the prior art, the present invention has the following beneficial effects: 1. Reduce equipment failures and extend service life: By automatically opening and closing the screen cover to adjust the gap, debris is prevented from getting stuck between the screen cover and the rake teeth, reducing rake tooth deformation, damage and other failures, thus reducing the frequency of rotary screen machine failures and extending service life by 3-5 years. 2. Improve on-site safety: The grating cover is normally closed, eliminating potential safety hazards in the channel; automatic operation requires no manual intervention, reducing the frequency of personnel inspections in dangerous areas (by 4-6 times per month) and improving the reliability of water-passing channel protection; 3. Simple structure and strong adaptability: It uses the power of the rake teeth and the gravity of the grid cover to open and close, without the need for an additional drive device. It is suitable for the passage of debris of different diameters (5-200mm) and can be directly adapted to the renovation of existing rotary bar screens. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 AA section view; Figure 3 for Figure 1 Enlarged view of part B; Figure 4 A schematic diagram of the main shaft in this utility model; Figure 5 This is a schematic diagram of the square seat bearing in this utility model; Figure 6 This is a schematic diagram of the structure of the retaining ring at the center shaft end of this utility model; Figure 7 This is a schematic diagram of the structure of the fixed base in this utility model; Figure 8 This is a diagram showing the usage state of this utility model (with the grid cover closed). Figure 9 This is a diagram showing the usage state of this utility model (showing the grid cover in the open state). The meanings of the reference numerals in the attached drawings are as follows: 1. Platform fixed cover plate; 2. Rotary bar screen machine; 3. Bar screen cover plate; 4. Fixed base; 5. Sewage channel; 6. Main shaft; 7. Bearing; 8. Diagonal tie rod; 9. Rake teeth; 10. Clearance; 11. Connecting rod; 12. Connecting plate; 13. Shaft end retaining ring; 14. Shaft sleeve; 15. Bearing hole; 16. Steel plate; 17. Rubber pad; 18. Debris; 19. Garbage truck. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] like Figure 1-9 As shown, a safety device for facilitating the automatic passage of materials includes a platform fixed cover plate 1 and a rotary bar screen 2. A movable cover plate mechanism is provided between the platform fixed cover plate 1 and the rotary bar screen 2. The movable cover plate mechanism includes a bar screen cover plate 3, a fixed base 4, and a rotating mechanism. The top surfaces of the bar screen cover plate 3 and the platform fixed cover plate 1 are on the same plane. A gap 10 of no more than 6 mm is provided between the bar screen cover plate 3 and the rake teeth 9 of the rotary bar screen 2. The fixed base 4 is symmetrically arranged on both sides of the sewage channel 5. A rotating mechanism is installed between two fixed bases 4 on the wall or steel structure. A safety mechanism is also installed on the fixed base 4. The safety mechanism includes a tie rod 8, one end of which is connected to the end face of the fixed base 4 near the rotary grid machine 2. The top surface of the other end of the tie rod 8 is parallel to the platform fixed cover plate 1. The safety mechanism includes a steel plate 16 and a rubber pad 17 mounted on the steel plate 16. The steel plate 16 and the rubber pad 17 are mounted on the top surface of the tie rod 8. The rotating mechanism includes a main shaft 6 and symmetrically arranged on the main shaft 6. The bearings 7 at both ends are square-seat bearings. The main shaft 6 passes through the square-seat bearings. The inner diameter of the bushing 14 between the main shaft 6 and the square-seat bearing is interference-fitted, with an interference amount of 0.02-0.04mm. Shaft end retaining rings 13 are respectively provided at both ends of the main shaft 6. The bearings 7 are connected and fixed to the fixed base 4. The fixed base 4 is a square structure that mates with the square-seat bearing. The fixed base 4 is provided with bearing holes 15 that mate with the square-seat bearing. A grid cover plate 3 is provided above the main shaft 6. The grid cover plate 3 is connected to the main shaft. A connecting mechanism is provided between the main shaft 6 and the grid cover plate 3. The connecting mechanism is located on the side of the grid cover plate 3 near the platform fixed cover plate 1. The connecting mechanism includes a connecting rod 11 and a connecting plate 12. The connecting rod 11 is symmetrically arranged on the main shaft 6, and the connecting plate 12 is symmetrically arranged on the bottom surface of the grid cover plate 3. The other end of the connecting rod 11 is fixedly connected to the center of the connecting plate 12. The axis of the connecting rod 11 is perpendicular to the connecting plate 12 and the main shaft 6 respectively. The distance between the connecting rod 11 and the edge of the grid cover plate 3 near the platform fixed cover plate 1 is 900mm.

[0023] The fixed base 4 is fixed to the wall or steel structure of the sewage channel 5 by M16 expansion bolts or chemical anchors, ensuring that the flatness error is ≤2mm after installation.

[0024] The UCFU 209 type square housing bearing contains a bearing housing and a deep groove ball bearing assembly, and the bearing housing is fastened to the screw holes of the fixed base 4 by bolts.

[0025] The spindle 6 is made of 40Cr steel and has been surface-treated (hardness 28-32HRC). The shaft diameter and the inner ring of the bearing are transition fit (H7 / k6). After the spindle 6 is inserted into the inner ring of the bearing 7, axial positioning is achieved by the shaft end retaining ring 13 + shaft shoulder, ensuring that the spindle 6 can rotate flexibly in the bearing 7 with a rotation clearance ≤0.05mm.

[0026] The insurance mechanism consists of a diagonal tie rod 8 made of ∠50×50×5 angle steel welded to a steel plate 16, and fixed to the concrete foundation at the bottom of the channel by expansion bolts. A thick wear-resistant rubber pad 17 is attached to the upper surface of the steel plate 16, which contacts the bottom surface of the grating cover 3 in the closed state, both limiting and buffering the impact of closing, reducing wear and noise.

[0027] Homework process: Initial closed state: The grid cover plate 3 maintains an initial gap of 6mm with the grid machine rake teeth; Sewage flows from sewage channel 5 in the sewage flow direction, and the rake teeth 9 of rotary bar screen 2 rotate in the rotation direction of rotary bar screen 2 to remove debris 18 from the sewage. Automatic opening process: When the rotary bar screen 2 retrieves larger debris 17, the rake teeth 9 rotate upward with the rotary bar screen 2 and use their own lifting force to drive the debris 18 upward. When the debris 18 contacts the bottom surface of the bar screen cover 3, it pushes the bar screen cover 3 to rotate upward around the main shaft 6. The main shaft 6 greatly reduces the rotational resistance through the cooperation of the bearing 7. The opening angle of the bar screen cover 3 is adaptively adjusted according to the size of the debris 18, so that the gap 10 is increased to meet the requirements for the passage of debris. Automatic closing process: After the large debris 18 has completely passed through the grid cover plate 3, the grid cover plate 3 is free. Under the action of its own gravity and the closing torque generated by the eccentric structure, the grid cover plate 3 rotates downward around the main shaft 6, returns to the initial closed state, and restores the 6mm gap 10. After passing through the grating cover 3, the debris 18 is transferred to the garbage truck 19.

Claims

1. A safety device for facilitating the automatic passage of materials through opening and closing, comprising a platform fixing cover and a rotary bar screen, characterized in that: A movable cover mechanism is provided between the platform fixed cover plate (1) and the rotary bar screen (2). The movable cover mechanism includes a bar screen cover plate (3), a fixed base (4) and a rotating mechanism. The top surfaces of the bar screen cover plate (3) and the platform fixed cover plate (1) are on the same plane. The fixed base (4) is symmetrically arranged on the walls or steel structures on both sides of the sewage channel (5). A rotating mechanism is provided between the two fixed bases (4). The rotating mechanism includes a main shaft (6) and bearings (7) symmetrically arranged at both ends of the main shaft (6). The bearings (7) are connected and fixed to the fixed base (4). The bar screen cover plate (3) is provided above the main shaft (6). A connecting mechanism is provided between the bar screen cover plate (3) and the main shaft (6). The connecting mechanism is located on the side of the bar screen cover plate (3) close to the platform fixed cover plate (1).

2. The safety device for facilitating automatic material passage opening and closing as described in claim 1, characterized in that: The fixed base (4) is also provided with a safety mechanism, which includes a tie rod (8). One end of the tie rod (8) is connected to the end face of the fixed base (4) near the rotary bar screen (2), and the top surface of the other end of the tie rod (8) is parallel to the platform fixed cover plate (1).

3. The safety device for facilitating automatic material passage opening and closing as described in claim 2, characterized in that: A gap (10) of no more than 6 mm is provided between the grating cover plate (3) and the rake teeth (9) of the rotary grating machine (2).

4. The safety device for facilitating automatic material passage opening and closing as described in claim 3, characterized in that: The connecting mechanism includes a connecting rod (11) and a connecting plate (12). The connecting rod (11) is symmetrically arranged on the main shaft (6), and the connecting plate (12) is symmetrically arranged on the bottom surface of the grid cover plate (3). The other end of the connecting rod (11) is fixedly connected to the center of the connecting plate (12). The axis of the connecting rod (11) is perpendicular to the connecting plate (12) and the main shaft (6) respectively.

5. The safety device for facilitating automatic material passage opening and closing as described in claim 4, characterized in that: The distance between the connecting rod (11) and the edge of the grid cover plate (3) near the platform fixed cover plate (1) is 900mm.

6. The safety device for facilitating automatic material passage opening and closing as described in claim 5, characterized in that: The bearing (7) is a square seat bearing, and the main shaft (6) is installed inside the square seat bearing. Shaft end retaining rings (13) are respectively installed at both ends of the main shaft (6).

7. The safety device for facilitating automatic material passage opening and closing as described in claim 6, characterized in that: The inner diameter of the main shaft (6) and the bushing (14) of the square seat bearing is an interference fit, with an interference amount of 0.02-0.04mm.

8. The safety device for facilitating automatic material passage opening and closing as described in claim 7, characterized in that: The fixed base (4) is a square structure that mates with the square seat bearing, and the fixed base (4) is provided with a bearing hole (15) that mates with the square seat bearing.

9. The safety device for facilitating automatic material passage opening and closing as described in claim 8, characterized in that: The insurance mechanism also includes a steel plate (16) and a rubber pad (17) disposed on the steel plate (16), the steel plate (16) and the rubber pad (17) being disposed on the top surface of the tie rod (8).

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