Brake belt device and brake method of direct-acting energy storage mechanism of belt conveyor

Abstract

The invention discloses a direct-acting energy storage mechanism braking belt device of a belt conveyor and a braking method, and belongs to the technical field of belt conveyors. The device comprises a U-shaped bolt set, a bottom frame, a spring direct-acting energy storage air cylinder driving device, a guide swing block device, an upper bracket and a gap adjuster. Wherein the bottom frame is symmetrically distributed and is fixed on a rack of the belt conveyor through the two U-shaped bolt groups, and the left side and the right side of the bottom frame are respectively provided with a group of gap adjusters; the lower end of the direct-acting energy storage cylinder driving device is mounted at the upper part of the gap adjuster and comprises a cylinder, a spring, a hinge seat and the like; the lower end of the guide swing block device is installed in the middle of the underframe, and the upper end of the guide swing block device is fixedly connected with the upper bracket. Compression energy generated by spring compression is used as a power source to drive friction between the damping plate and the conveying belt to generate braking force, and braking work can be achieved under the condition that an air source breaks down. The device is simple in structure, high in adaptability, low in failure rate, convenient to install and suitable for working conditions of downward conveying and horizontal conveying belt conveyors.

Description

Technical Field

[0001] This invention relates to the field of belt conveyor technology, and in particular to a direct-acting energy storage mechanism braking belt device and braking method for belt conveyors in braking systems. Background Technology

[0002] The braking system is a key component of a belt conveyor. The perfection and performance of the braking system directly affect the safe and reliable operation of the entire machine. During the braking process of a high-power belt conveyor, the brake must not only overcome the load torque, but also continuously absorb the heat generated during the braking process and dissipate it in a timely manner.

[0003] Currently, high-power controllable braking devices mainly include self-cooled disc brakes, hydraulic brakes, electro-hydraulic actuator brakes, and damping plate auxiliary brakes. Braking (single-point centralized drum or disc brakes driven by multiple power sources such as hydraulic, electro-hydraulic, and electric): When the machine stops and brakes, excess downward force will act entirely on the centralized brake, causing the brake wheel temperature to rise, and even leading to brake failure and runaway accidents. Brakes are often only installed at the machine head or position. For the braking process of long-distance belt conveyors, because the conveyor belt is a viscoelastic material, single-point or centralized braking can cause significant elastic slippage of the conveyor belt, posing a great safety risk.

[0004] The adjustable damping buffer braking system disclosed in patent number CN201921452388.3 is a multi-point braking belt based on a traditional brake. The problem is that if the two piston rods moving in the two hydraulic cylinders do not move synchronously, the entire mechanism will jam, meaning the damping plate will become stuck and unable to brake. This is caused by the rod mechanism that makes up the adjustable damping buffer braking system. The system consists of six components: a damping plate (groove angle adjustment seat), two hydraulic cylinders, two piston rods, and a guide device (base). Of these, five are moving parts: four are revolute joints, four are prismatic joints, and the total number of lower joints is eight. The degree of freedom is -1 = 3 × 5 - 2 × 8, which does not constitute a complete mechanism. The two piston rods on the left and right are the driving elements; if they do not move synchronously, the entire mechanism will jam. Summary of the Invention

[0005] Technical problem: The purpose of this invention is to overcome the shortcomings of the prior art and provide a direct-acting energy storage mechanism braking belt device and braking method for belt conveyors that is simple in structure, easy to use, and has good braking effect.

[0006] Technical Solution: The present invention provides a direct-acting energy storage mechanism braking belt device for a belt conveyor, comprising a base frame, a spring-driven direct-acting energy storage cylinder device, a guide rocker device, an upper bracket, and a gap adjuster, all disposed between upper idler rollers that support the conveyor belt on the belt conveyor frame. The base frame comprises a frame formed by two symmetrically arranged outer side plates, horizontal rectangular steel bars, and vertical rectangular steel plates. The two symmetrical outer side plates are located on the left and right sides, the two symmetrical horizontal rectangular steel bars are symmetrically arranged front and back between the two outer side plates, and the two vertical rectangular steel plates are symmetrically arranged left and right between the two horizontal rectangular steel bars. A longitudinal grooved steel block is provided in the middle of the frame between the two longitudinal rectangular steel plates. The guide rocker device is located on the longitudinal grooved steel block, and the upper bracket is located on the guide rocker device. The spring-driven direct-acting energy storage cylinder device and the gap adjuster are two separate devices, one symmetrically arranged between the base of the two outer side plates and the bottom of the upper bracket, and the other fixed to the upper part of the spring-driven direct-acting energy storage cylinder device. U-bolt groups are provided on the outer sides of the two outer side plates and fixed to the belt conveyor frame.

[0007] The outer side plate is a right-angled Z-shaped plate, and the inner end face of the outer side plate is symmetrically provided with triangular reinforcing ribs on both sides of the gap adjuster.

[0008] The gap adjuster includes a cylinder base plate, an external threaded column, a hexagonal nut head A, an internal threaded column, a central optical shaft, cylinder base plate screws, optical shaft connecting bolts, and base frame connecting bolts. The internal threaded column has two perforated lugs on both sides, which are mounted on the inner end face of the outer side plate via base frame connecting bolts. The internal threaded column is threadedly connected to the external threaded column, and the internal threaded column has a hexagonal nut head A on its upper part. The central optical shaft is connected to the cylinder base plate via optical shaft connecting bolts, and the external threaded column is rotatably connected between the central optical shaft and the cylinder base plate. The cylinder base plate is connected to the lower part of the spring-driven direct-acting energy storage cylinder device via cylinder base plate screws.

[0009] The spring-driven direct-acting energy storage cylinder device includes a cylinder barrel, a cylinder piston, a spring seat sensor, a spring, a cylinder piston rod head, and an upper hinge seat. The cylinder barrel and the cylinder piston form a sealed cavity, and the cylinder piston rod extends from the upper end of the cylinder barrel. The upper part of the cylinder barrel has an upper air port communicating with an air pipe, and the lower part of the cylinder barrel has a lower air port communicating with an air pipe. The lower part of the cylinder barrel is fixed to the cylinder base plate of the gap adjuster. The cylinder piston rod extending from the cylinder barrel is provided with a spring and a cylinder piston rod head in sequence, and the cylinder piston rod head is hinged to the upper hinge seat fixed to the bottom of the upper bracket. The top of the cylinder barrel is provided with a spring seat sensor that contacts the bottom of the spring. The compression height of the spring is equal to the distance from the cylinder piston to the bottom of the cylinder.

[0010] The guide rocker device includes a rocker seat, a rocker, a guide cylinder, and a guide base plate; the rocker seat is fixedly installed on a longitudinal rectangular steel plate, the guide rocker is hinged to the rocker seat and then slidably installed with the guide cylinder; the top of the guide cylinder is fixed to the guide base plate, and the guide base plate is fixedly connected to the bottom of the upper bracket.

[0011] The upper bracket includes a damping plate, a damping plate base plate, an airfoil connecting plate, damping plate connecting bolts, a side connecting plate, and a horizontal connecting plate. There are three damping plates and three damping plate base plates. The damping plates and damping plate base plates are stacked and fixed together by the damping plate connecting bolts. The three damping plate base plates are fixed in an "airfoil" shape on the front and rear airfoil connecting plates. The bottom of the airfoil connecting plate is provided with a horizontal connecting plate that is fixed to the guide base plate of the guide rocker device. The two wings of the airfoil connecting plate are provided with side connecting plates that are fixed to the upper hinge seat of the spring direct-acting energy storage cylinder device.

[0012] The above-mentioned application of the direct-acting energy storage mechanism brake belt device of a belt conveyor involves placing the direct-acting energy storage mechanism brake belt device on the belt conveyor frame located between two adjacent upper idler roller devices, and fixing it to the belt conveyor frame with a U-bolt group. When the belt conveyor is working normally: The first step is to control the high-pressure gas from the gas source to enter the upper sealing chamber from the upper air port B of the cylinder barrel to push the cylinder piston, drive the cylinder piston rod A to retract downward and compress the spring, and release the gas from the lower air port A of the cylinder, so that the combination of the guide cylinder, guide base plate and upper bracket descends, and the damping plate of the upper bracket disengages from the conveyor belt to the lowest point. The second step is to use a hook or hexagonal wrench to rotate the hexagonal nut head A on the upper part of the external thread column of the gap adjuster, so that the internal thread column spirals upward. This then pushes the cylinder base plate of the gap adjuster, the central optical shaft, the spring direct-acting energy storage cylinder device, the upper bracket, and the guide cylinder and guide base plate of the guide rocker device to rise, thereby adjusting the gap between the damping plate and the conveyor belt.

[0013] When the belt conveyor brakes in an emergency: the air supply is cut off, the cylinder spring rebounds and extends, pushing the cylinder piston rod head to rise, causing the combination of the guide cylinder, guide base plate and upper bracket to rise. At this time, the damping plate of the upper bracket comes into contact with the conveyor belt and generates braking force through friction, thereby ensuring the braking safety of the belt conveyor.

[0014] The gap between the damping plate and the conveyor belt is adjusted to be 2-6 mm.

[0015] Beneficial Effects: This invention utilizes the existing space between idlers by adding a braking device. It employs the compressed energy of a cylinder-driven spring as a power source to drive the damping plate against the conveyor belt's frictional resistance. Even if the air source fails, it can still operate effectively, thus achieving braking. This solves the problem of over-constraint between the degrees of freedom and the driving force in existing damping plate braking mechanisms. A guide rocker device is incorporated to ensure that the overall degrees of freedom of the mechanism are equal to the number of driving forces, eliminating over-constraint. The invention utilizes the existing space between idlers by adding a braking device, employing a 7-bar linkage mechanism in a direct-acting cylinder braking belt device, such as... Figure 8 The implemented mechanism consists of seven components: link one, link two, link three, link four, link five, link six, and link seven (fixed frame). There are six moving links, five revolute joints, three prismatic joints, and a total of eight lower joints. The mechanism has two degrees of freedom (2 = 3 × 6 - 2 × 8). There are two driving links (two drive cylinders), and their degrees of freedom equal the number of driving links. This seven-link mechanism, forming the direct-acting cylinder brake belt device, has a defined relative motion. While using cylinders as the power source, hydraulic cylinders can also be used. The damping plate interacts with the conveyor belt's frictional resistance, thus achieving braking. The overall degrees of freedom of the mechanism are equal to the number of driving links, eliminating over-constraint. Even if the two driving links do not move synchronously, the entire mechanism will not jam, overcoming the shortcomings of the adjustable damping buffer braking system disclosed in patent number CN201921452388.3. When a cylinder malfunctions, the guide rocker mechanism in the device swings with a small amplitude. Even when it swings to its limit, a single cylinder can still lift the damping plate, causing the braking device to rub against the damping plate to generate braking force, greatly reducing braking accidents on the belt conveyor. In actual operation, if constant braking force or constant deceleration control is required, the cylinder pressure (braking force) needs to be stably controlled. This invention achieves braking force regulation by controlling the reversal of "pneumatic / hydraulic pressure—spring force". During braking, the cylinder depressurizes, the spring releases its compression energy, the damping plate rises to its highest point, the contact pressure reaches its maximum, and the frictional braking force reaches its maximum. To achieve constant braking force, high-pressure gas enters from the air hole on the cylinder, the damping plate descends, the contact pressure decreases, and the frictional braking force is controlled to a constant value. Similarly, to achieve constant deceleration braking, constant deceleration is achieved by controlling the frictional braking force. This "reversing valve—mechanical" method of braking force regulation has a smaller control delay compared to the existing "electromagnetic repeated reversing" control method. Its simple structure, strong adaptability, low failure rate, and convenient installation make it most suitable for the working conditions of belt conveyors with large inclination angles, greatly reducing braking accidents of belt conveyors. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the brake belt device of the direct-drive energy storage mechanism for belt conveyors of the present invention.

[0017] Figure 2This is a schematic diagram of the initial state of the brake belt device of the direct-acting energy storage mechanism for belt conveyors according to the present invention.

[0018] Figure 3 This is an enlarged schematic diagram of the gap adjuster of the present invention.

[0019] Figure 4 This is a schematic diagram of the energy storage state of the present invention.

[0020] Figure 5 This is a schematic diagram of the gap adjustment of the present invention.

[0021] Figure 6 This is a schematic diagram of the braking process of the present invention.

[0022] Figure 7 This is a schematic diagram of the installation location structure of an example of the present invention used in a belt conveyor.

[0023] Figure 8 This is a simplified diagram of the motion principle of the direct-acting energy storage mechanism brake belt device of the present invention.

[0024] In the diagram: 1. Direct-acting energy storage mechanism brake belt device; 1-1. U-bolt group; 2. Base frame; 2-1. Outer side plate; 2-2. Horizontal rectangular steel bar; 2-3. Longitudinal channel steel block; 2-4. Longitudinal rectangular steel plate; 3. Spring-driven direct-acting energy storage cylinder device; 3-2. Cylinder barrel; 3-2A. Air outlet; 3-2B. Air inlet; 3-3. Cylinder piston; 3-3A. Cylinder piston rod; 3-4. Spring seat sensor; 3-5. Spring; 3-6. Cylinder piston rod head; 3-7. Upper hinge seat; 4. Guide rocker device; 4-1. Rocker seat; 4-2. Guide rocker; 4-3. Guide cylinder; 4- 4. Guide base plate; 5. Upper bracket; 5-1. Damping plate; 5-2. Damping plate base plate; 5-3. Airfoil connecting plate; 5-4. Damping plate connecting bolt; 5-5. Side connecting plate; 5-6. Horizontal connecting plate; 6. Gap adjuster; 6-1. Cylinder base plate; 6-2. External threaded post; 6-2A. Hexagonal nut head; 6-3. Internal threaded post; 6-4. Central optical shaft; 6-5. Cylinder base plate screw; 6-6. Optical shaft connecting bolt; 6-7. Base frame connecting bolt; 12. Main braking device; 13. Brake roller; 14. Upper idler roller device; 15. Belt conveyor frame; 16. Conveyor belt. Detailed Implementation

[0025] An embodiment of the present invention will be further described below with reference to the accompanying drawings: like Figure 1 Figure 2As shown, the direct-acting energy storage mechanism brake belt device of the belt conveyor of the present invention includes a base frame 2, a guide rocker device 4 disposed in the middle of the base frame 2, and an upper support frame 5 disposed on the guide rocker device 4, a gap adjuster 6 symmetrically disposed between the bottom of the base frame 2 and the upper support frame 5, and a spring direct-acting energy storage cylinder device 3 fixedly connected to its upper part; the base frame 2 is symmetrically distributed and spans the belt conveyor frame 15, including two outer side plates 2-1, two horizontal rectangular steel bars 2-2, a base frame longitudinal channel steel 2-3, and two longitudinal rectangular steel plates 2-4, with the left and right outer side plates 2-1 symmetrically arranged. The front and rear symmetrical horizontal rectangular steel bars 2-2 are set between the inner sides of the left and right outer plates 2-1, and the longitudinal channel steel 2-3 of the base frame supporting the guide rocker block device 4 in the middle is set between the front and rear symmetrical horizontal rectangular steel bars 2-2; the outer upper plane plates of the left and right outer plates 2-1 are respectively provided with U-bolts 1-1 fixed on the belt conveyor frame 15; the lower ends of the two gap adjusters 6 are respectively connected to the inner lower plane plates of the two outer plates 2-1, the upper ends of the gap adjusters 6 are connected to the lower ends of the spring direct-acting energy storage cylinder device 3, and the top of the spring direct-acting energy storage cylinder device 3 is connected to the upper bracket 5.

[0026] The gap adjuster 6 includes a cylinder base plate 6-1, an external threaded post 6-2, a hexagonal nut head 6-2A, an internal threaded post 6-3, a central optical axis 6-4, a cylinder base plate screw 6-5, an optical axis connecting bolt 6-6, and a base frame connecting bolt 6-7. The internal threaded post 6-3 has two perforated lugs on both sides, which are installed on the inner end face of the outer side plate 2-1 by the base frame connecting bolt 6-7. The internal threaded post 6-3 is threadedly connected to the external threaded post 6-2, and the internal threaded post 6-3 has a hexagonal nut head 6-2A on its upper part. The central optical axis 6-4 is connected to the cylinder base plate 6-1 by the optical axis connecting bolt 6-6, and the external threaded post 6-2 is rotatably connected between the central optical axis 6-4 and the cylinder base plate 6-1. The cylinder base plate 6-1 is connected to the lower part of the spring direct-acting energy storage cylinder device 3 by the cylinder base plate screw 6-5.

[0027] The spring-driven direct-acting energy storage cylinder device 3 includes a cylinder barrel 3-2, an air outlet 3-2A, an air inlet 3-2B, a cylinder piston 3-3, a spring seat sensor 3-4, a spring 3-5, a cylinder piston rod head 3-6, and an upper hinge seat 3-7. The lower part of the cylinder barrel 3-2 is fixed on the cylinder base plate 6-1 of the gap adjuster 6. The cylinder piston 3-3 and the cylinder piston rod 3-3A are slidably connected to the cylinder barrel 3-2. The upper end of the cylinder piston rod 3-3A is then threadedly connected to the cylinder piston rod head 3-6. The cylinder piston rod head 3-6 is then hinged to the upper hinge seat 3-7, which is fixedly connected to the upper bracket 5. The spring seat sensor 3-4 passes through the cylinder piston rod 3-3A and is installed at the upper end of the cylinder barrel 3-2. The spring 3-5 is installed between the spring seat sensor 3-3 and the cylinder piston rod head 3-6.

[0028] The guide rocker device 4 includes a rocker seat 4-1, a rocker 4-2, a guide cylinder 4-3, and a guide base plate 4-4; the rocker seat 4-1 is fixedly installed on the longitudinal rectangular steel plate 2-4, the guide rocker 4-2 is hinged to the rocker seat 4-1, and then slidably installed with the guide cylinder 4-3; the top of the guide cylinder 4-3 is fixed to the guide base plate 4-4, and the guide base plate 4-4 is fixedly connected to the bottom of the upper bracket 5.

[0029] The upper bracket 5 includes a damping plate 5-1, a damping plate base plate 5-2, an airfoil connecting plate 5-3, a damping plate connecting bolt 5-4, a side connecting plate 5-5, and a horizontal connecting plate 5-6. There are three damping plates 5-1, and the three damping plates 5-1 are arranged in an airfoil shape. Each damping plate 5-1 is mounted on the damping base plate 5-2 by the damping plate connecting bolt 5-4. The upper parts of the three damping base plates 5-2 are fixed together by two front and two rear airfoil connecting plates 5-3, and the lower parts of the two airfoil connecting plates 5-3 are fixed together by one side connecting plate 5-5 and two horizontal connecting plates 5-6.

[0030] like Figure 2 The image shows the initial state of the brake belt device of the direct-acting energy storage mechanism of the belt conveyor.

[0031] like Figure 3 The image shown is an enlarged view of the gap adjuster 6 of the brake belt device of the direct-acting energy storage mechanism of the belt conveyor.

[0032] like Figure 4 As shown, the gap adjuster 6 is reverse self-locking. When high-pressure gas from the gas source enters the sealing cavity through the upper air port 3-2B of the cylinder barrel, it drives the cylinder piston 3-4 to retract, and the drive spring 3-5 is in a compressed state. The assembly consisting of the guide cylinder 4-3, the guide base plate 4-4, and the upper bracket 5 is located at the lower limit position, and the conveyor belt 16 is disengaged from the damping plate 5-1 of the upper bracket 5. like Figure 5 As shown, the cylinder is locked. Using a hook or hexagonal wrench, rotate the hexagonal nut head 6-2A on the upper part of the external thread column 6-2 of the gap adjuster 6 in the forward direction, so that the internal thread column 6-3 spirals upward. Then, it pushes the cylinder base plate 6-1 of the gap adjuster 6, the central optical shaft 6-4, the spring direct-acting energy storage cylinder device 3, the upper bracket 5, and the guide cylinder 4-3 and guide base plate 4-4 of the guide rocker device 4 to form a new assembly that rises. Adjust the damping plate 5-1 and the conveyor belt 16 to the appropriate gap, and the threaded pair reverses and self-locks.

[0033] like Figure 6 As shown, during emergency braking, when the high-pressure gas from the air source is released from the sealed cavity through the lower air port 3-2B of the cylinder barrel, the spring 3-5 extends from the compressed state, and the piston rod head 3-6 of the drive cylinder extends out; the assembly consisting of the guide cylinder 4-3, the guide base plate 4-4, and the upper bracket 5 rises, and the maximum distance of the rise is equal to the distance from the cylinder piston 3-3 to the bottom of the cylinder, so that the damping plate 5-1 of the upper bracket 5 contacts and rubs against the conveyor belt 16 to generate braking force.

[0034] like Figure 7 As shown, an upper idler roller device 14 is installed every 2-4 meters on the upper part of the belt conveyor frame 15. Each upper idler roller device 14 is fixed to the belt conveyor frame 15 by a U-bolt group 1-1 or other means. The direct-acting energy storage mechanism brake belt device 1 is installed between two adjacent upper idler roller devices 14 and fixed to the belt conveyor frame 15 by a U-bolt group 1-1.

[0035] The braking method of the direct-acting energy storage mechanism braking belt device of the belt conveyor of the present invention involves setting the direct-acting energy storage mechanism braking belt device 1 on the belt conveyor frame 15 located between two adjacent upper idler roller devices 14, and fixing it to the belt conveyor frame 15 by a U-bolt group 1-1. When the belt conveyor is working normally: First, the high-pressure gas from the air source is controlled to enter the upper sealing chamber from the upper air port 3-2B of the cylinder barrel 3-2 to push the cylinder piston 3-3, which drives the cylinder piston rod 3-3A to retract downward and compress the spring 3-5. The lower air port 3-2A of the cylinder releases the gas, causing the combination of guide cylinder 4-3, guide bottom plate 4-4 and upper bracket 5 to descend. The damping plate 5-1 of the upper bracket 5 disengages from the conveyor belt 16 and reaches the lowest point. The second step involves using a hook or hexagonal wrench to rotate the hexagonal nut head 6-2A on the upper part of the external threaded post 6-2 of the gap adjuster 6, causing the internal threaded post 6-3 to spiral upward. This, in turn, pushes the cylinder base plate 6-1 of the gap adjuster 6, the central optical shaft 6-4, the spring direct-acting energy storage cylinder device 3, the upper bracket 5, and the guide cylinder 4-3 and guide base plate 4-4 of the guide rocker device 4 to form a new assembly that rises, adjusting the gap between the damping plate 5-1 and the conveyor belt from 16 to 2-6 mm.

[0036] When the belt conveyor brakes in an emergency: the direct-acting energy storage mechanism brake belt device 1 works in conjunction with the main braking device 12. The main braking device 12 first acts on the brake drum 13 to generate braking force on the conveyor belt 16. At the same time, the air source is de-energized, and the cylinder spring 3-4 rebounds and extends, pushing the cylinder piston rod head 3-6 to rise. This causes the combination of the guide cylinder 4-3, the guide base plate 4-4, and the upper bracket 5 to rise. At this time, the damping plate 5-1 of the upper bracket 5 contacts and rubs against the conveyor belt 16 to generate braking force. With the additional resistance provided by the direct-acting energy storage mechanism brake belt device 1, multi-point braking is achieved, increasing the braking effect and effectively improving the safety and controllability of braking. Especially under heavy load or emergency conditions, it can respond quickly and effectively prevent the conveyor belt 16 from slipping uncontrollably due to excessive inertia, ensuring the safety of equipment and personnel.

[0037] like Figure 8 The diagram shows a simplified representation of the motion principle of a direct-acting cylinder brake belt device: Links 1, 2, 3, 4, 5, 6, and 7 form a seven-bar linkage and two springs; link 1 corresponds to the fixed frame consisting of the base frame 11, the cylinder hinge seat 12-1 of the drive cylinder 12, and the rocker block seat 13-1 of the swing guide device 13; link 2 corresponds to the cylinder barrel 12-2 of the right drive cylinder 12; link 3 corresponds to the piston 12-3 and piston rod head 12-4 of the right drive cylinder 12; and link 4 corresponds to the piston rod head 12-4 of the left drive cylinder 12. Cylinder 12-2; Rod 5 corresponds to piston 12-3 and piston rod head 12-4 of the left drive cylinder 12; Rod 6 corresponds to guide cylinder 13-3 of upper bracket 14 and swing guide device 13; Rod 7 corresponds to rocker block 13-2 of swing guide device 13; The number of its moving parts is 6, the number of revolute joints is 5, the number of prismatic joints is 3, the total number of lower joints is 8, the degree of freedom of the mechanism is 2 = 3 × 6 - 2 × 8, the driving part is 2, that is, two drive cylinders, the degree of freedom is equal to the number of driving parts, the 7-bar mechanism that makes up the direct-acting cylinder brake belt device has a definite relative motion.

Claims

1. A braking belt device for a direct-acting energy storage mechanism of a belt conveyor, characterized in that: The direct-acting energy storage mechanism brake belt device (1) includes a base frame (2) located between the upper idler roller device (14) that supports the conveyor belt (16) on the belt conveyor frame (15), a spring direct-acting energy storage cylinder device (3), a guide rocker device (4), an upper bracket (5), and a gap adjuster (6); the base frame (2) includes a frame formed by two symmetrically arranged outer side plates (2-1), horizontal rectangular steel bars (2-2), and vertical rectangular steel plates (2-4). The two symmetrically arranged outer side plates (2-1) are located on the left and right sides, the two symmetrical horizontal rectangular steel bars (2-2) are symmetrical front and back and are respectively located between the two outer side plates (2-1), and the two vertical rectangular steel plates (2-4) are symmetrical left and right and are respectively located on the two horizontal rectangular steel bars. Between (2-2), a longitudinal grooved steel block (2-3) is provided in the middle of the frame between the two longitudinal rectangular steel plates (2-4); the guide rocker device (4) is provided on the longitudinal grooved steel block (2-3), the upper bracket (5) is provided on the guide rocker device (4), the spring direct-acting energy storage cylinder device (3) is two symmetrical devices, the lower part of the two spring direct-acting energy storage cylinder devices (3) is fixed on the base of the two outer plates (2-1) by the gap adjuster (6), and the top of the two spring direct-acting energy storage cylinder devices (3) is respectively hinged to the bottom of the upper bracket (5); the outer sides of the two outer plates (2-1) are respectively provided with U-bolt groups (1-1) fixed on the belt conveyor frame (15).

2. The braking belt device for a direct-acting energy storage mechanism of a belt conveyor according to claim 1, characterized in that: The outer side plate (2-1) is a right-angled Z-shaped plate, and the inner end face of the outer side plate (2-1) is symmetrically provided with triangular reinforcing ribs on both sides of the base of the gap adjuster (6).

3. The braking belt device for a direct-acting energy storage mechanism of a belt conveyor according to claim 1, characterized in that: The gap adjuster (6) includes a cylinder base plate (6-1), an external threaded post (6-2), a hexagonal nut head (6-2A), an internal threaded post (6-3), a central optical axis (6-4), a cylinder base plate screw (6-5), an optical axis connecting bolt (6-6), and a base frame connecting bolt (6-7); the internal threaded post (6-3) has a perforated lug on each side, which is mounted on the inner end face of the outer side plate (2-1) by the base frame connecting bolt (6-7); the internal threaded post ( 6-3) is threaded to the external threaded column (6-2), and the upper part of the internal threaded column (6-3) is equipped with a hexagonal nut head (6-2A); the central optical axis (6-4) is connected and fixed to the cylinder base plate (6-1) by optical axis connecting bolts (6-6), and the external threaded column (6-2) is threaded between the central optical axis (6-4) and the cylinder base plate (6-1); the cylinder base plate (6-1) is fixed to the bottom of the spring direct-acting energy storage cylinder device (3) by cylinder base plate screws (6-5).

4. The direct-acting energy storage mechanism braking belt device for a belt conveyor according to claim 1, characterized in that: The spring-driven direct-acting energy storage cylinder device (3) includes a cylinder barrel (3-2), a cylinder piston (3-3), a spring seat sensor (3-4), a spring (3-5), a cylinder piston rod head (3-6), and an upper hinge seat (3-7); the cylinder barrel (3-2) and the cylinder piston (3-3) form a sealed cavity, and the cylinder piston rod (3-3A) of the cylinder piston (3-3) extends from the upper end of the cylinder barrel (3-2); the upper part of the cylinder barrel (3-2) is provided with an upper air port (3-2B) communicating with an air pipe, and the lower part of the cylinder barrel (3-2) is provided with a lower air port (3-2B) communicating with an air pipe. -2A); the bottom of the cylinder barrel (3-2) is fixed on the cylinder base plate (6-1) of the gap adjuster (6); the cylinder piston rod (3-3A) extending out of the cylinder barrel (3-2) is provided with a spring (3-5) and a cylinder piston rod head (3-6) in sequence, and the cylinder piston rod head (3-6) is hinged to the upper hinge seat (3-7) fixed at the bottom of the upper bracket (5); the top of the cylinder barrel (3-2) is provided with a spring seat sensor (3-4) that contacts the bottom of the spring (3-5); the maximum compression height of the spring (3-5) is equal to the distance from the cylinder piston (3-3) to the bottom of the cylinder.

5. The direct-acting energy storage mechanism braking belt device for a belt conveyor according to claim 1, characterized in that: The guide rocker device (4) includes a rocker seat (4-1), a rocker (4-2), a guide cylinder (4-3), and a guide base plate (4-4). The rocker seat (4-1) is fixedly installed on a longitudinal rectangular steel plate (2-4). The guide rocker (4-2) is hinged to the rocker seat (4-1) and then slidably installed with the guide cylinder (4-3). The top of the guide cylinder (4-3) is fixed on the guide base plate (4-4), and the guide base plate (4-4) is fixedly connected to the bottom of the upper bracket (5).

6. The brake belt device for a direct-acting energy storage mechanism according to claim 1, characterized in that: The upper bracket (5) includes a damping plate (5-1), a damping plate base plate (5-2), an airfoil connecting plate (5-3), a damping plate connecting bolt (5-4), a side connecting plate (5-5), and a horizontal connecting plate (5-6). There are three damping plates (5-1) and three damping plate base plates (5-2). The damping plates (5-1) and three damping plate base plates (5-2) are stacked and fixed together by the damping plate connecting bolt (5-4). The three damping plate base plates (5-2) are fixed in an "airfoil" shape on the front and rear airfoil connecting plates (5-3). The bottom of the airfoil connecting plate (5-3) is provided with a horizontal connecting plate (5-6). The bottom of the two wings of the two airfoil connecting plates (5-3) is provided with a side connecting plate (5-5) that is fixed to the upper hinge seat (3-7) of the spring direct-acting energy storage cylinder device (3).

7. The braking method of a direct-acting energy storage mechanism brake belt device according to any one of claims 1-6, characterized in that: The direct-acting energy storage mechanism brake belt device (1) is installed on the belt conveyor frame (15) between two adjacent upper idler roller devices (14) and fixed to the belt conveyor frame (15) by a U-bolt group (1-1); When the belt conveyor is working normally: The first step is to control the high-pressure gas from the gas source to enter the upper sealing chamber from the upper air port (3-2B) of the cylinder barrel (3-2) to push the cylinder piston (3-3), which in turn drives the cylinder piston rod (3-3A) to retract downward and compress the spring (3-5). The lower air port (3-2A) of the cylinder releases the gas, causing the combination of the guide cylinder (4-3), the guide base plate (4-4), and the upper bracket (5) to descend. The damping plate (5-1) of the upper bracket (5) disengages from the conveyor belt (16) and reaches the lowest point. The second step is to use a hook or hexagonal wrench to rotate the hexagonal nut head (6-2A) on the upper part of the external thread column (6-2) of the gap adjuster (6), so that the internal thread column (6-3) spirals up, and then pushes the cylinder base plate (6-1) of the gap adjuster (6) and the central optical shaft (6-4), the spring direct-acting energy storage cylinder device (3), the upper bracket (5), the guide cylinder (4-3) of the guide rocker device (4) and the guide base plate (4-4) to form a new assembly to rise, and adjust the gap between the damping plate (5-1) and the conveyor belt (16); When the belt conveyor brakes in an emergency: the air source is cut off, the cylinder spring (3-4) rebounds and extends, pushing the cylinder piston rod head (3-6) to rise; causing the combination of guide cylinder (4-3), guide base plate (4-4) and upper bracket (5) to rise. At this time, the damping plate (5-1) of the upper bracket (5) comes into contact with the conveyor belt (16) and generates braking force through friction, thereby ensuring the braking safety of the belt conveyor.

8. The braking method of the brake belt device for a direct-acting energy storage mechanism according to claim 7, characterized in that: The gap between the adjusting damping plate (5-1) and the conveyor belt (16) is 2-6mm.

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