Direct-acting air cylinder belt braking device and method

Abstract

The invention discloses a direct-acting air cylinder belt braking device and method, and belongs to the technical field of belt conveyors. The device comprises a U-shaped bolt set, a bottom frame, a driving air cylinder, a swing guiding device and an upper bracket. Wherein the bottom frame is symmetrically distributed and is fixed on a rack of the belt conveyor through two U-shaped bolt groups; the left side and the right side of the bottom frame are each provided with a driving air cylinder. The lower end of the swing guide device is installed in the middle of the underframe, and the upper end of the swing guide device is fixedly connected with the upper bracket. Over-constraint in an existing device is avoided through the swing guiding device, and belt braking work can be achieved under the condition that a single air source breaks down. The direct-acting air cylinder braking belt device has the advantages of being high in adaptability, low in failure rate, convenient to install, suitable for the belt conveyor, and more suitable for the large-dip-angle belt conveyor.

Description

Technical Field

[0001] This invention relates to the field of belt conveyor technology, and in particular to a direct-acting cylinder brake belt device and 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, there are five moving parts: four revolute joints and four prismatic joints, for a total of eight lower joints. The degree of freedom is -1 = 3 × 5 - 2 × 8, which is insufficient to constitute a complete mechanism. The two piston rods on the left and right are the two 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 cylinder brake belt device and its application that is simple in structure, easy to use, and has good braking effect.

[0006] Technical Solution: The present invention provides a direct-acting cylinder brake belt device, comprising a base frame, a drive cylinder, a swing guide device, and an upper bracket, disposed between the upper idler rollers of the belt conveyor frame that support the conveyor belt; the base frame comprises a frame formed by two symmetrically arranged outer plates and two horizontal rectangular steel bars symmetrically connected between the two outer plates, with longitudinal channel steel blocks supporting the swing guide device located in the middle of the two horizontal rectangular steel bars; the upper bracket is disposed on the swing guide device; there are two drive cylinders, with the bottoms of the two drive cylinders symmetrically disposed on the bases of the two outer plates, and the tops fixed to the bottom sides of the upper bracket; the outer sides of the two outer plates are respectively provided with U-shaped bolt groups 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 base of the drive cylinder.

[0008] The drive cylinder includes a cylinder hinge seat, a cylinder barrel, a piston, a piston rod, a piston rod head, a lower cylinder barrel air port, and an upper cylinder barrel air port. The cylinder barrel and the piston form a sealed cavity, and the piston rod extends from the upper end of the cylinder barrel. The upper part of the cylinder barrel is provided with an upper cylinder barrel air port communicating with an air pipe, and the lower part of the cylinder barrel is provided with a lower cylinder barrel air port communicating with an air pipe. The lower part of the cylinder barrel is hinged to the cylinder hinge seat installed at the bottom of the outer side plate. The piston rod extending out of the cylinder barrel is provided with a piston rod head, and the piston rod head is hinged to a bracket fixed to the upper support.

[0009] The swing guide device includes a rocker block seat, a rocker block, and a guide cylinder; the rocker block seat is fixedly installed on the longitudinal channel steel block in the middle of the base frame, the guide rocker block is hinged to the rocker block seat, and the guide rocker block is slidably installed with the guide cylinder; the upper part of the guide cylinder is fixedly connected to the bottom of the upper bracket.

[0010] The upper bracket includes a damping plate, a damping base plate, fixing bolts, an airfoil connecting plate, a transverse connecting plate, and a side connecting plate. The damping plate is divided into three parts: left, middle, and right. The cross-section of the damping plate is airfoil-shaped. The three damping plates are respectively mounted on the three damping base plates by fixing bolts. The three damping base plates are fixed together by two front and rear airfoil connecting plates. The two airfoil connecting plates are fixed together by one transverse connecting plate and two side connecting plates. Each side connecting plate has a perforated lug on its side that is hinged to the piston rod head of the drive cylinder.

[0011] The braking method of the above-mentioned direct-acting cylinder brake belt device is as follows: the direct-acting cylinder brake belt device is installed on the belt conveyor frame between two adjacent upper idler roller devices, and is fixed to the belt conveyor frame by a group of U-bolts; When the belt conveyor is working normally: high-pressure gas from the air source enters the upper sealing chamber from the upper air port of the cylinder to push the piston, which drives the cylinder piston rod to move downwards. The lower air port of the cylinder releases gas, causing the combination of the guide cylinder and the upper bracket to descend, and the damping plate of the upper bracket to disengage from the conveyor belt. When the belt conveyor brakes in an emergency: the direct-acting cylinder brake belt device works in conjunction with the main braking device. The main braking device first acts on the brake drum to generate the main braking force; at the same time, high-pressure gas from the air source is controlled to enter the rodless chamber sealed cavity from the lower air port of the cylinder to drive the piston to move upward; this drives the combination of the guide cylinder and the 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.

[0012] Beneficial effects: By adopting the above technical solution, this invention solves the problem of over-constraint between the degrees of freedom and the driving force in the existing damping plate braking mechanism. Utilizing the existing space between idlers, an auxiliary braking device is added, employing a 7-bar linkage in the direct-acting cylinder brake belt device, such as... Figure 4 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 pairs. The mechanism has 2 degrees of freedom (2 = 3 × 6 - 2 × 8). There are two driving links (two driving cylinders), and their degrees of freedom equal to 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 auxiliary 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. This invention has a simple structure, is easy to operate, highly adaptable, has a low failure rate, and is easy to install. It is suitable for long-distance belt conveyor operation and greatly reduces braking accidents of belt conveyors. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural schematic diagram of the direct-acting cylinder brake belt device of the present invention.

[0014] Figure 2 This is a schematic diagram of the "initial state" of the direct-acting cylinder brake belt device of the present invention.

[0015] Figure 3 This is a schematic diagram of the "braking state" of the direct-acting cylinder brake belt device of the present invention.

[0016] Figure 4This is a simplified diagram illustrating the motion principle of the direct-acting cylinder brake belt device of the present invention.

[0017] Figure 5 This is a schematic diagram of the installation position of the direct-acting cylinder brake belt device of the present invention.

[0018] In the diagram: 1. Direct-acting cylinder mechanism brake belt device; 2. Main braking device; 3. Brake roller; 4. Upper idler roller device; 5. Belt conveyor frame; 6. Conveyor belt; 10. U-bolt assembly; 11. Base frame; 11-1. Outer plate of base frame; 11-2. Horizontal rectangular steel bar; 11-3. Central longitudinal channel steel block; 12. Drive cylinder; 12-1. Cylinder hinge seat; 12-2. Cylinder barrel; 12-3. Piston; 12-4... A. Piston rod; 12-4. Piston rod head; 12-5A. Lower air hole of cylinder; 12-5B. Upper air hole of cylinder; 13. Swing guide device; 13-1. Rocker seat; 13-2. Rocker; 13-3. Guide cylinder; 14. Upper bracket; 14-1. Damping plate; 14-2. Damping base plate; 14-3. Fixing bolt; 14-4. Airfoil connecting plate; 14-5. Horizontal connecting plate; 14-6. Inclined connecting plate. Detailed Implementation

[0019] The following description, in conjunction with the accompanying drawings, further illustrates an embodiment of the present invention: like Figure 1 As shown, the direct-acting cylinder brake belt device of the present invention mainly consists of a base frame 11, a drive cylinder 12, a swing guide device 13, and an upper support frame 14, which are located between the upper idler roller device 4 of the conveyor belt 6 on the frame 5 of the belt conveyor. The base frame 11 includes a frame formed by two symmetrically arranged outer side plates 11-1, two horizontal rectangular steel bars 11-2, and a central longitudinal groove steel block 11-3. The two symmetrical outer side plates 11-1 are located on the left and right sides, and the two horizontal rectangular steel bars 11-2 are symmetrically arranged front and back, respectively located between the two outer side plates 11-1. The central longitudinal groove steel block 11-3... -3 is set between two symmetrical outer side plates 11-1; the swing guide device 12 is set on the central longitudinal channel steel block 11-3, the upper bracket 14 is set on the swing guide device 13, and there are two drive cylinders 12, which are symmetrically set between the base of the two outer side plates 11-1 and the bottom of the upper bracket 14; the outer sides of the two outer side plates 11-1 are provided with U-bolt groups 10 fixed on the belt conveyor frame 5; the outer side plates 11-1 are right-angled Z-shaped plates, and the inner end faces of the outer side plates 11-1 are symmetrically provided with triangular reinforcing ribs on both sides of the base of the drive cylinder 12.

[0020] Figure 2As shown, the drive cylinder 12 includes a cylinder hinge seat 12-1, a cylinder barrel 12-2, a piston 12-3, a piston rod 12-3A, a piston rod head 12-4, a lower air port 12-5A, and an upper air port 12-5B. The cylinder barrel 12-2 and the piston 12-3 form a sealed cavity, and the piston rod 12-3A of the piston 12-3 extends from the upper end of the cylinder barrel 12-2. The upper part of the cylinder barrel 12-2 is provided with... The cylinder has an upper air port 12-5B connected to an air pipe, and a lower air port 12-5A connected to an air pipe at the bottom of the cylinder barrel 12-2. The lower part of the cylinder barrel 12-2 is hinged to a cylinder hinge seat 12-1 installed at the bottom of the outer side plate 11-1 of the base frame 11. A piston rod 12-3A extending out of the cylinder barrel 12-2 is provided with a piston rod head 12-4, and the piston rod head 3-6 is hinged to the upper bracket 5. When high-pressure gas from the air source enters the upper sealing chamber from the upper air port 12-5B of the cylinder barrel 12-2, it pushes the piston 12-3, causing the cylinder piston rod 3-3A to move downwards. The lower air port 12-2A releases gas, causing the assembly composed of the guide cylinder 13-3 and the upper bracket 14 to descend, and the damping plate 14-1 of the upper bracket 14 to disengage from the conveyor belt 6. The upper bracket 14 includes a damping plate 14-1, a damping base plate 14-2, fixing bolts 14-3, an airfoil connecting plate 14-4, a transverse connecting plate 14-5, and a side connecting plate 14-6. The damping plate 14-1 is divided into three parts: left, middle, and right. The cross-section of the damping plate 14-1 is airfoil-shaped. The three damping plates are respectively mounted on the three damping base plates 14-2 by fixing bolts 14-3. The three damping base plates 14-2 are fixed together by two front and rear airfoil connecting plates 14-4. The two airfoil connecting plates 14-4 are fixed together by one transverse connecting plate 14-5 and two side connecting plates 14-6. Each side connecting plate 14-6 has a perforated lug on its side that is hinged to the piston rod head 11-4 of the drive cylinder 12.

[0021] Figure 3 As shown, the swing guide device 13 includes a rocker block seat 13-1, a rocker block 13-2, and a guide cylinder 13-3. The rocker block seat 13-1 is fixedly installed on the longitudinal channel steel block 11-3 in the middle of the base frame 11. The guide rocker block 13-2 is hinged to the rocker block seat 13-1, and the guide rocker block 13-2 is slidably installed with the guide cylinder 12-3. The upper part of the guide cylinder 12-3 is fixed to the lower part of the upper bracket 14. High-pressure gas from the air source is controlled to enter the rodless chamber sealing ring from the lower air port 12-2A of the cylinder, driving the piston 12-3 to move upward. This causes the assembly consisting of the guide cylinder 13-3 and the upper bracket 14 to rise. At this time, the damping plate 14-1 of the upper bracket 14 contacts and rubs against the conveyor belt 6 to generate braking force, thereby ensuring the braking safety of the belt conveyor.

[0022] like Figure 4The 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. Link 1 is a fixed frame consisting of a base frame 11, a cylinder hinge seat 12-1 for the drive cylinder 12, and a rocker block seat 13-1 for the swing guide device 13. Link 2 is the cylinder barrel 12-2 of the right-side drive cylinder 12. Link 3 consists of the piston 12-3 and piston rod head 12-4 of the right-side drive cylinder 12. Link 4 is the cylinder barrel 12-2 of the left-side drive cylinder 12. Link 5 consists of the piston 12-3 and piston rod head 12-4 of the left-side drive cylinder 12. Link 6 consists of an upper bracket 14 and a guide cylinder 13-3 for the swing guide device 13. Link 7 is the rocker block 13-2 of the swing guide device 13. The number of moving parts is 6, there are 5 revolute joints, 3 prismatic joints, and a total of 8 lower joints.

[0023] like Figure 5 As shown, an upper idler roller device 4 is installed every 2-4 meters on the upper part of the belt conveyor frame 5. Each upper idler roller device 4 is fixed to the belt conveyor frame 5 by a group of U-bolts or other means. The direct-acting cylinder brake belt device is installed between two adjacent upper idler roller devices 4 and is fixed to the belt conveyor frame 5 by a group of U-bolts 10.

[0024] The braking method of the direct-acting cylinder brake belt device of the present invention is as follows: the direct-acting cylinder brake belt device 1 is installed on the belt conveyor frame 5 located between two adjacent upper idler roller devices 4, and is fixed on the belt conveyor frame 5 by a U-bolt group 10. When the belt conveyor is working normally: the high-pressure gas from the air source is controlled to enter the upper sealing chamber from the upper air port 12-5B of the cylinder 12-2 to push the piston 12-3, which drives the cylinder piston rod 12-3A to move downwards. The lower air port 12-5A of the cylinder releases gas, causing the combination of the guide cylinder 13-3 and the upper bracket 14 to descend. The damping plate 14-1 of the upper bracket 14 disengages from the conveyor belt 6. When the belt conveyor brakes in an emergency: the direct-acting cylinder brake belt device works in conjunction with the main braking device. The main braking device 2 first acts on the brake drum 3 to generate the main braking force. At the same time, high-pressure gas from the air source is controlled to enter the rodless chamber seal ring from the lower air port 12-2A of the cylinder to drive the piston 12-3 to move upward. This drives the combination of the guide cylinder 13-3 and the upper bracket 14 to rise. At this time, the damping plate 14-1 of the upper bracket 14 comes into contact with the conveyor belt 6 and generates braking force through friction, thereby ensuring the braking safety of the belt conveyor. With the additional resistance provided by the direct-acting cylinder brake belt device, multi-point braking is achieved, which increases the braking effect and effectively improves the safety and controllability of braking. Especially under heavy load or emergency conditions, it can respond quickly and effectively prevent the conveyor belt 6 from slipping uncontrollably due to excessive inertia, thus ensuring the safety of equipment and personnel.

Claims

1. A direct-acting cylinder brake belt device, characterized in that: The direct-acting cylinder brake belt device (1) includes a base frame (11), a drive cylinder (12), a swing guide device (13), and an upper bracket (14) located between the upper idler roller device (4) that supports the conveyor belt (6) on the belt conveyor frame (5); the base frame (11) includes a frame formed by two symmetrically arranged outer plates (11-1) and two horizontal rectangular steel bars (11-2) symmetrically connected between the two outer plates (11-1), with the middle of the two horizontal rectangular steel bars (11-2) The longitudinal channel steel block (11-3) is provided with a support swing guide device (13). The upper bracket (14) is located on the swing guide device (13). There are two driving cylinders (12). The bottom of the two driving cylinders (12) is symmetrically located on the base of the two outer side plates (11-1). The top is fixed to the bottom of both sides of the upper bracket (14). The outer side of the two outer side plates (11-1) is provided with U-bolt groups (10) fixed on the belt conveyor frame (5).

2. The direct-acting cylinder brake belt device according to claim 1, characterized in that: The outer side plate (11-1) is a right-angled Z-shaped plate, and the inner end face of the outer side plate (11-1) is symmetrically provided with triangular reinforcing ribs on both sides of the base of the driving cylinder (12).

3. The direct-acting cylinder brake belt device according to claim 1, characterized in that: The drive cylinder (12) includes a cylinder hinge seat (12-1), a cylinder barrel (12-2), a piston (12-3), a piston rod (12-3A), a piston rod head (12-4), a lower air port (12-5A) and an upper air port (12-5B) of the cylinder barrel; the cylinder barrel (12-2) and the piston (12-3) form a sealed cavity, and the piston rod (12-3A) of the piston (12-3) extends from the upper end of the cylinder barrel (12-2); the cylinder barrel (12-2) The upper part of the cylinder (12-2) is provided with an upper air port (12-5B) that communicates with the air pipe, and the lower part of the cylinder (12-2) is provided with a lower air port (12-5A) that communicates with the air pipe; the lower part of the cylinder (12-2) is hinged to the cylinder hinge seat (12-1) installed at the bottom of the outer side plate (11-1); the piston rod (12-3A) extending out of the cylinder (12-2) is provided with a piston rod head (12-4), and the piston rod head (12-4) is hinged to the upper bracket (14).

4. The direct-acting cylinder brake belt device according to claim 1, characterized in that: The swing guide device (13) includes a rocker block seat (13-1), a rocker block (13-2), and a guide cylinder (13-3); the rocker block seat (13-1) is fixedly installed on the middle longitudinal channel steel block (11-3) of the base frame (11), the guide rocker block (13-2) is hinged to the rocker block seat (13-1), and the guide rocker block (13-2) is slidably installed with the guide cylinder (12-3); the upper part of the guide cylinder (12-3) is fixedly connected to the bottom of the upper bracket (14).

5. The direct-acting cylinder brake belt device according to claim 1, characterized in that: The upper bracket (14) includes a damping plate (14-1), a damping base plate (14-2), fixing bolts (14-3), an airfoil connecting plate (14-4), a transverse connecting plate (14-5), and a side connecting plate (14-6). The damping plate (14-1) is divided into three parts: left, middle, and right. The cross-section of the damping plate (14-1) is airfoil-shaped. The three damping plates are respectively installed on the three damping plates by fixing bolts (14-3). On the damping base plate (14-2); the three damping base plates (14-2) are fixed together by two front and rear airfoil connecting plates (14-4), and the two airfoil connecting plates (14-4) are fixed together by a transverse connecting plate (14-5) and two side connecting plates (14-6); each side connecting plate (14-6) has a perforated lug on its side that is hinged to the piston rod head (11-4) of the drive cylinder (12).

6. The braking method of the direct-acting cylinder brake belt device according to claim 1, characterized in that: The direct-acting cylinder brake belt device (1) is installed on the belt conveyor frame (5) located between two adjacent upper idler roller devices (4) and fixed to the belt conveyor frame (5) by a U-bolt group (10); When the belt conveyor is working normally: the high pressure gas from the air source is controlled to enter the upper sealing chamber from the upper air port (12-5B) of the cylinder (12-2) to push the piston (12-3), which drives the cylinder piston rod (12-3A) to move downwards. The lower air port (12-5A) of the cylinder releases gas, causing the combination of the guide cylinder (13-3) and the upper bracket (14) to descend. The damping plate (14-1) of the upper bracket (14) disengages from the conveyor belt (6). When the belt conveyor is braked in an emergency: the direct-acting cylinder brake belt device works in conjunction with the main braking device. The main braking device (2) first acts on the brake drum (3) to generate the main braking force. At the same time, the high-pressure gas from the air source is controlled to enter the rodless chamber sealing chamber from the lower air port (12-5A) of the cylinder to drive the piston (12-3) to move upward. This drives the combination of the guide cylinder (13-3) and the upper bracket (14) to rise. At this time, the damping plate (14-1) of the upper bracket (14) comes into contact with the conveyor belt (6) and generates braking force through friction, thereby ensuring the braking safety of the belt conveyor.

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