Self-closing turning plate device applied to closed stock bin
The self-closing flap device solves the sealing problem of the silo inlet, realizes automatic control and environmental protection, improves the sealing performance and production efficiency of the enclosed silo, and reduces energy loss and dust pollution.
Patent Information
- Application Number
- CN202520515674.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-24
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-03-24
AI Technical Summary
The sealing effect of the feed inlet of the concrete enclosed silo is not ideal, which leads to material temperature loss and dust emission, affecting production costs and the environment. In addition, the irregular structure of the conveyor belt head makes the sealing problem difficult to solve.
Design a self-closing flap device, including a flap system and a reset system. Utilize the lever principle to automatically open and close the flap door. Combined with anti-jamming and slow-descent mechanisms, ensure the sealing of the feed inlet and environmental protection.
It effectively isolates heat exchange between the inside and outside of the chamber, reduces energy loss, lowers production costs, improves product quality, reduces dust pollution, and is easy to maintain.
Smart Images
Figure CN223836315U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of concrete silo sealing technology, specifically to a self-closing flap device applied to sealed silos. Background Technology
[0002] In concrete production, temperature-controlled aggregate silos are storage devices for temperature-controlled concrete aggregates. Their main function is to pre-cool or preheat the aggregates within the silo to produce concrete that meets the pouring temperature requirements. These silos must prevent the material from being affected by external temperatures, ensuring that the aggregate temperature during pre-cooling or preheating remains within the design range. Currently, the feeding of enclosed concrete silos is mainly accomplished by belt conveyors, with aggregates entering the silo through the receiving hopper at the head of the belt conveyor. The silo inlet is also sealed by the receiving hopper at the head of the belt conveyor. However, due to the irregular structure of the receiving hopper, the sealing effect at the silo inlet is consistently unsatisfactory. Temperature loss from the material inside the silo is easy, and the dust generated during the aggregate descent is uncontrollable, increasing production and operating costs, causing environmental pollution, and even resulting in substandard concrete outlet temperatures, affecting project quality. Utility Model Content
[0003] The purpose of this invention is to provide a self-closing flap device for use in enclosed silos, so as to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution:
[0005] A self-closing flap device for use in enclosed silos, comprising:
[0006] The flap system includes a pair of flap doors rotatably installed at the inlet of the hopper. A reset system is fixedly connected to the flap doors to the outside of the hopper inlet. The reset system is used to open the flap doors when the hopper is feeding material and to reset them after feeding is completed, so that the flap doors are tightly closed.
[0007] Preferably, one end of the flap door is located inside the hopper, and a rotating shaft is fixedly installed on the other end of the flap door. The flap door is rotatably installed at the hopper inlet via the rotating shaft, ensuring that the flap door can rotate around the axis of the rotating shaft.
[0008] Preferably, bases are fixedly installed on both sides of the top of the hopper inlet, and clamps are fixedly installed on the bases. The rotating shaft is rotatably installed at the hopper inlet through the bases and clamps.
[0009] Preferably, the reset system is fixedly installed on the rotating shaft. The reset system includes several connecting rods, one end of which is fixedly connected to the rotating shaft radially, and the other end of which is equipped with a reset structure.
[0010] Preferably, the reset structure is a counterweight, which is connected to the connecting rod by a thread. The counterweight is equipped with fastening screws to facilitate adjustment and fixation of the counterweight on the connecting rod, thereby adjusting the center of gravity of the reset system.
[0011] Preferably, a wear-resistant liner is fixedly installed on the upper surface of the flip door. The wear-resistant liner adopts a double-layer structure of high manganese wear-resistant steel plate and polymer plate, and an insulation board is attached to the bottom of the wear-resistant liner.
[0012] Preferably, an anti-jamming mechanism is fixedly installed on the bottom surface of the flip door, and the anti-jamming mechanism is a ball-type pneumatic vibrator.
[0013] Preferably, a slow-descent mechanism is provided directly below the flap door, and the slow-descent mechanism is fixedly installed inside the hopper.
[0014] Preferably, an electronic monitoring system and a radar level gauge are also fixedly installed on the top surface of the silo inlet. The electronic monitoring system is used to monitor the operation of the device in real time, and the radar level gauge is used to monitor the aggregate height in the silo in real time. Both the electronic monitoring system and the radar level gauge are connected to an external system.
[0015] The beneficial effects of the above-mentioned technical solution of this utility model are as follows:
[0016] This solution features a flap system and a reset system. Utilizing the lever principle, it automatically opens the flap door when feeding into the closed silo using a counterweight system and automatically closes the flap door after feeding ends. This invention can immediately close the aggregate inlet after feeding stops, preventing dust from falling aggregates and protecting the environment. Simultaneously, it ensures the silo door remains closed when no feeding occurs. For pre-cooled or preheated aggregates, it effectively isolates heat exchange between the inside and outside of the silo, ensuring the pre-cooling or preheating effect of the aggregates and improving product quality.
[0017] This design features an anti-jamming mechanism on the underside of the flap door, which can be activated to resolve material jamming at the hopper inlet. A slow-descent mechanism is also installed below the flap door to effectively slow the material's descent speed and prevent damage to the refrigeration equipment. This design improves the sealing of the hopper inlet, resolving sealing issues caused by irregularities in the conveyor belt head structure, reducing energy consumption, saving production costs, increasing productivity, and improving concrete product quality. It is also more environmentally friendly, and the vulnerable parts are easy to maintain. Attached Figure Description
[0018] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:
[0019] Figure 1 This is a schematic diagram of the flip-plate system and reset system of this utility model;
[0020] Figure 2 This is a plan view of the present invention;
[0021] Figure 3 for Figure 2 Schematic diagram of AA section in the middle;
[0022] Figure 4 This is a schematic diagram of the facade operation of this utility model.
[0023] Explanation of reference numerals in the attached figures:
[0024] 1. Flip-up system; 11. Flip-up door; 12. Rotating shaft; 13. Base; 14. Clamp; 15. Anti-jamming mechanism; 2. Reset system; 21. Connecting rod; 22. Reset structure; 3. Wear-resistant liner; 31. High manganese wear-resistant steel plate; 32. Polymer board; 33. Insulation board; 4. Hopper inlet; 5. Slow-descent mechanism; 6. Electronic monitoring; 7. Radar level gauge; 8. Belt conveyor head; 9. Aggregate. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.
[0026] This solution utilizes a flap system 1, a reset system 2, and a slow-descent system. Taking advantage of the lever principle, when aggregate 9 falls, it lands on the flap door 11. The weight of aggregate 9 plus the weight of the flap pry open the reset structure 22, allowing aggregate 9 to fall into the silo. If the flap door 11 becomes jammed during the descent, an anti-jamming mechanism 15 is activated, causing the flap door 11 to shake and resolve the jamming issue. Additionally, the slow-descent mechanism 5 cushions the falling aggregate 9, reducing its gravitational potential energy and preventing damage to the refrigeration equipment. When feeding stops, the reset structure 22, using its own reset energy, automatically and tightly closes the flap door 11. The entire process is automated and requires no manual intervention.
[0027] After introducing the basic principles of this utility model, various non-limiting embodiments of this utility model are described in detail below. Any quantity of elements in the accompanying drawings is for illustrative purposes only and not for limitation, and any naming is for distinction only and has no limiting meaning.
[0028] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.
[0029] Example 1
[0030] A self-closing flap device for use in enclosed silos, such as Figure 1-4 As shown, the system includes a flap system 1 and a reset system 2. The flap system 1 includes a pair of flap doors 11, one end of which is located inside the hopper, and the other end is fixedly mounted with a rotating shaft 12. The rotating shaft 12 is rotatably mounted on both sides of the top of the hopper inlet 4 via a base 13 and a clamp 14, ensuring that the flap doors 11 can rotate around the axis of the rotating shaft 12. The reset structure 22 includes several connecting rods 21, with at least two connecting rods 21. One end of each connecting rod 21 is fixedly mounted at equal intervals on the rotating shaft 12 along its radial direction, and the other end of the rotating shaft 12 is fixedly mounted with the reset structure 22. In this embodiment, the reset structure 22 is a plurality of counterweights, and the connecting rods 21 are screws. The counterweights are fixedly mounted on the screws via threads, and the center of gravity of the reset system 2 can be adjusted via the threads.
[0031] Specifically, a pair of flap doors 11 are rotatably installed on opposite sides of the hopper inlet 4 via a rotating shaft 12. The flap doors 11 can rotate around the axis of the rotating shaft 12. Connecting rods 21 are fixedly installed at equal intervals along the radial direction of the rotating shaft 12, and counterweights are threaded onto the connecting rods 21. When the counterweights are reset, the flap doors 11 are pried closed by the connecting rods 21 and the rotating shaft 12. At this time, the end of the flap door 11 away from the rotating shaft 12 is abutted and located inside the hopper. The top of the flap door 11 is inverted triangular, leaving space for the conveyor belt head to sink during feeding.
[0032] The working process is as follows: When aggregate 9 falls, it lands on the flap door 11. The weight of aggregate 9 plus the weight of the flap door pry open the reset structure 22, allowing aggregate 9 to fall into the silo. When feeding stops, the reset structure 22 uses its own reset energy to automatically and tightly close the flap door 11.
[0033] The connecting rod 21 and the counterweight are installed by threads. The position of the counterweight on the connecting rod 21 can be adjusted according to the actual production situation, thereby changing the center of gravity of the reset system 2 and enabling the device to smoothly feed different materials.
[0034] In this embodiment, the counterweight is equipped with fastening screws. After the position of the counterweight is adjusted to achieve the ideal state of opening the door when feeding and closing the door when feeding stops, the fastening screws are used to fix the position of the counterweight to prevent the center of gravity from shifting.
[0035] In this embodiment, a wear-resistant liner 3 is fixedly installed on the upper surface of the flip door 11. The wear-resistant liner 3 adopts a double-layer structure of high manganese wear-resistant steel plate 31 and polymer plate 32, wherein the high manganese wear-resistant steel plate 31 is the bottom plate and the upper polymer plate 32 is ultra-high molecular weight polyethylene plate.
[0036] The high-manganese wear-resistant steel plate 31 and the polymer plate 32 are connected by countersunk screws, which improves the service life of the liner plate and allows for easy replacement of the liner plate assembly, facilitating later maintenance. A layer of rubber and plastic insulation board 33 is attached to the bottom of the wear-resistant base plate, which can effectively isolate the heat exchange between the inside and outside of the warehouse and reduce the energy loss inside the warehouse.
[0037] Anti-jamming mechanism 15 is fixedly installed on the lower side of each flap door 11. In this embodiment, the anti-jamming mechanism 15 is a ball-type pneumatic vibrator. Through electronic monitoring 6 comparison detection, when the aggregate 9 is stuck between the two flap doors 11, the flap doors 11 cannot open and close smoothly. At this time, the external system will activate the anti-jamming mechanism 15. Through the excitation effect of the vibrator, the flap doors 11 will shake, thereby dealing with the occurrence of jamming.
[0038] A slow-descent mechanism 5 is provided directly below the flip door 11. The slow-descent mechanism 5 is fixedly installed inside the hopper. The slow-descent mechanism 5 can be fixedly installed with the top plate of the hopper inlet 4 and the inner wall around the hopper.
[0039] The slow-fall mechanism 5 can reduce the falling speed of aggregate 9 in the silo, preventing large pieces of aggregate 9 from falling too fast and breaking, reducing the particle size of aggregate 9 and affecting the mix proportion of finished concrete; at the same time, the device can reduce the falling speed of aggregate 9 to prevent falling aggregate 9 from damaging the air duct of the refrigeration system inside the silo; the slow-fall mechanism 5 can also prevent material segregation.
[0040] In this embodiment, the slow-descent mechanism 5 is existing technology, such as a slow-descent plate, a slow-descent ladder, or a slow-descent frame, etc., and will not be described in detail here.
[0041] In some embodiments of this utility model, an electronic monitoring system 6 and a radar level gauge 7 are fixedly installed on the top surface of the silo inlet 4, both of which are connected to an external system. The electronic monitoring system 6 is used to compare and analyze information such as the feeding speed, the thickness of the wear-resistant liner 3, and the opening and closing status of the flap door 11 in real time; the radar level gauge 7 is used to monitor the height of the aggregate 9 in the silo, and to control the conveyor belt to feed or stop feeding through the external system, thereby improving the cooling or heating effect and preventing the silo from overflowing.
[0042] Example 2
[0043] Its main difference from Example 1 is:
[0044] The reset structure 22 is a tension spring. The end of the connecting rod 21 away from the rotating shaft 12 is elastically connected to the top surface of the hopper through the tension spring. When feeding stops, the flap system 1 and the reset system 2 are reset by the elastic tension provided by the tension spring.
[0045] The above-described preferred embodiments of the present invention are provided for guidance, but it will be apparent to those skilled in the art that such embodiments are provided merely by way of example. Many modifications, alterations, and alternatives will arise in the mind and spirit of the present invention without departing from its intent. It should be understood that various alternatives to the embodiments of the present invention described herein may be employed in the practice of the present invention. The appended claims are intended to define the scope of protection of the present invention and therefore cover the modular compositions, equivalents, or alternatives within the scope of these claims.
Claims
1. A self-closing flap device for use in enclosed silos, characterized in that, include: The flap system (1) includes a pair of flap doors (11) rotatably installed at the hopper inlet (4). The flap doors (11) are fixedly connected to a reset system (2) outside the hopper inlet (4). The reset system (2) is used to open the flap doors (11) when the hopper is feeding and reset after feeding, so that the flap doors (11) are tightly closed.
2. The self-closing flap device for closed silos according to claim 1, characterized in that: One end of the flap door (11) is located inside the hopper, and a rotating shaft (12) is fixedly installed on the other end of the flap door (11). The flap door (11) is rotatably installed at the hopper inlet (4) via the rotating shaft (12) to ensure that the flap door (11) can rotate around the axis of the rotating shaft (12).
3. The self-closing flap device for closed silos according to claim 2, characterized in that: A base (13) is fixedly installed on both sides of the top of the hopper inlet (4), and a clamp (14) is fixedly installed on the base (13). The rotating shaft (12) is rotatably installed at the hopper inlet (4) through the base (13) and the clamp (14).
4. The self-closing flap device for closed silos according to claim 2, characterized in that: The reset system (2) is fixedly installed on the rotating shaft (12). The reset system (2) includes several connecting rods (21). One end of the connecting rod (21) is fixedly connected to the rotating shaft (12) radially along the rotating shaft (12), and the other end of the connecting rod (21) is equipped with a reset structure (22).
5. The self-closing flap device for closed silos according to claim 4, characterized in that: The reset structure (22) is a counterweight. The counterweight and the connecting rod (21) are connected by threads. The counterweight has fastening screws, which facilitates the adjustment and fixing of the position of the counterweight on the connecting rod (21), thereby adjusting the center of gravity of the reset system (2).
6. The self-closing flap device for closed silos according to claim 1, characterized in that: A wear-resistant liner (3) is fixedly installed on the upper surface of the flip door (11). The wear-resistant liner (3) adopts a double-layer structure of high manganese wear-resistant steel plate (31) and polymer plate (32). A heat insulation board (33) is also attached to the bottom of the wear-resistant liner (3).
7. The self-closing flap device for closed silos according to claim 1, characterized in that: The bottom surface of the flip door (11) is fixedly equipped with an anti-jamming mechanism (15), which is a ball-type pneumatic vibrator.
8. The self-closing flap device for closed silos according to claim 1, characterized in that: A slow-descent mechanism (5) is provided directly below the flip door (11), and the slow-descent mechanism (5) is fixedly installed inside the hopper.
9. The self-closing flap device for closed silos according to claim 1, characterized in that: An electronic monitoring device (6) and a radar level gauge (7) are also fixedly installed on the top surface of the silo inlet (4). The electronic monitoring device (6) is used to monitor the operation of the device in real time, and the radar level gauge (7) is used to monitor the height of the aggregate (9) in the silo in real time. Both the electronic monitoring device (6) and the radar level gauge (7) are connected to an external system.