Disc brake hydraulic system for a waste belt conveyor

Abstract

The utility model discloses a kind of disc brake hydraulic systems of gangue discharging rubber belt conveyor, including the disc brake of being installed on rubber belt conveyor;Disc brake includes brake shoe and brake disc coaxially arranged with the drum of rubber belt conveyor;Disc brake connects quick response pipeline, quick response pipeline is connected to three-way throttle valve, three-way throttle valve is also connected with energy accumulator by pressure maintaining pipeline;Three-way throttle valve is also connected to hydraulic station;The utility model can adjust the oil pressure of pressure maintaining pipeline and quick response pipeline according to demand by increasing three-way throttle valve in hydraulic system, to control the quick opening and closing of disc brake, shorten control time, prevent the phenomenon of belt sliding down.

Description

Technical Field

[0001] This utility model belongs to the technical field of waste rock removal belt conveyor equipment, and particularly relates to a hydraulic system for a disc brake of a waste rock removal belt conveyor. Background Technology

[0002] The belt conveyor in the waste rock dump operates in a complex environment. It is a steeply inclined belt with a slope of up to 25 degrees, which poses significant safety and efficiency risks during actual operation.

[0003] The currently used disc brakes have a slow opening and closing response speed, requiring 8 seconds for each single opening and closing. More importantly, there is a 5-second pause buffer time between the stop and the sliding state of the belt conveyor when it is loaded. This time window makes the backstop a crucial line of defense for equipment safety. If the backstop fails, the disc brake, due to its slow response, will miss the optimal braking opportunity, leading to belt slippage. When the belt slips, the loaded goods will roll down and accumulate at the tail of the machine, causing not only equipment damage but also forcing the production operation to stop. Utility Model Content

[0004] The purpose of this invention is to provide a hydraulic system for the disc brake of a waste rock discharge belt conveyor to reduce the opening / closing time of a belt with a large inclination angle.

[0005] The present invention adopts the following technical solution: a hydraulic system for a rotary kiln conveyor disc brake, comprising a disc brake installed on the conveyor belt; The disc brake includes brake shoes and a brake disc that are coaxially mounted with the drum of the belt conveyor; The control panel is connected to a fast-response pipeline, which in turn connects to a three-way throttle valve. The three-way throttle valve is also connected to an accumulator via a pressure-holding pipeline. The three-way throttle valve is also connected to the hydraulic station.

[0006] The beneficial effects of this utility model are: by adding a three-way throttle valve to the hydraulic system, the oil pressure of the pressure-holding pipeline and the fast response pipeline can be adjusted according to the needs, thereby controlling the rapid opening and closing of the gate, shortening the control time, and preventing belt slippage. Attached Figure Description

[0007] Figure 1 This is a front view schematic diagram of a hydraulic system for a coal waste conveyor disc brake according to an embodiment of the present invention; Figure 2 This is a top view schematic diagram of the hydraulic system of the disc brake of a waste rock conveyor according to an embodiment of the present invention.

[0008] Among them: 10. Disc brake; 11. Brake disc; 12. Brake shoe; 20. Belt; 30. Accumulator; 40. Pressure holding line; 50. Three-way throttle valve; 60. Quick response line; 70. Hydraulic station; 80. Pressure gauge. Detailed Implementation

[0009] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0010] Belt conveyors for waste rock dumping are mostly used in steep incline conditions, resulting in complex operating environments. Especially in scenarios where the belt incline exceeds 16°, significant safety risks arise when the equipment transitions from a stationary to a sliding position while loaded. Existing hydraulic disc brake systems generally suffer from slow opening and closing response times, with single actions taking up to 8 seconds. Furthermore, there is a response delay during braking after shutdown, leading to untimely braking and increasing the risk of belt slippage and cargo rolling. If critical safety devices such as backstops fail, and the disc brake cannot respond quickly, material will accumulate at the tail end of the machine, damaging the equipment and potentially causing prolonged production interruptions.

[0011] Therefore, reducing the response time of the control system and ensuring that braking can be completed quickly in emergency situations has become a key issue in ensuring the safe and efficient operation of large-angle belt conveyors.

[0012] This utility model discloses a hydraulic system for the disc brake of a waste rock removal belt conveyor, such as... Figure 1 and Figure 2 As shown (arrows in the figure indicate the direction of belt movement), a disc brake 10 is installed on the belt conveyor; the disc brake 10 includes brake shoes 12 and a brake disc 11 coaxially arranged with the drum of the belt conveyor; the disc brake 10 is connected to a pressure holding line 40 and a fast response line 60 respectively; the fast response line 60 is connected to a three-way throttle valve 50, and the three-way throttle valve 50 is also connected to an accumulator 30 through the pressure holding line 40; the accumulator 30 is installed on the pressure holding line 40; both the pressure holding line 40 and the fast response line 60 are connected to the three-way throttle valve 50, and the three-way throttle valve 50 is also connected to a hydraulic station 70.

[0013] This invention adds a three-way throttle valve 50 to the hydraulic system, which can adjust the oil pressure of the pressure-holding pipeline 40 and the rapid response pipeline 60 as needed, thereby controlling the rapid opening and closing of the disc brake 10, shortening the control time, and preventing belt slippage.

[0014] By constructing a hydraulic system that includes a dual-pipeline structure and a three-way throttle valve 50 for coordinated control, precise control of the opening and closing process of the disc gate 10 is achieved, which significantly improves the action response speed while ensuring long-term pressure stability of the system.

[0015] The disc brake 10, as the core actuator, is installed on the drive drum of the belt conveyor to actively limit the rotational movement of the drum. The disc brake 10 adopts a standard disc braking structure, specifically including a brake disc 11 and brake shoes 12. The brake disc 11 is fixedly mounted on the rotating shaft of the drum and rotates synchronously with the drum; the brake shoes 12 are fixed to the frame and do not rotate with the shaft. Under hydraulic pressure, they can press or release the surface of the brake disc 11, thereby achieving braking or releasing operations. A small gap is maintained between the brake shoes 12 and the brake disc 11 to ensure sensitive operation and avoid no-load wear.

[0016] The pressure-holding line 40 is mainly used to maintain stable oil pressure in the system when it is not in operation, preventing malfunctions or brake failures caused by pressure fluctuations due to leakage or temperature changes. An accumulator 30 is installed on this line, which acts as an energy storage element and can continuously compensate for system pressure losses when the hydraulic station 70 stops supplying oil. The accumulator 30 is connected to the pressure-holding line 40 via a shut-off valve for easy maintenance and isolation, and is also equipped with a pressure gauge and a safety valve to monitor the operating status.

[0017] The rapid response line 60 is specifically designed for the rapid opening and emergency braking response of the disc brake 10. Compared to the pressure holding line 40, which focuses on steady-state maintenance, the rapid response line 60 emphasizes dynamic performance, requiring lower flow resistance and higher flow capacity to complete the input or discharge of large amounts of hydraulic oil in a short time. The inner diameter of this line is generally larger than that of the pressure holding line 40.

[0018] The two aforementioned pipelines are connected to a three-way throttle valve 50, which is the core control element for flow distribution and flow direction switching in this system. The three-way throttle valve 50 has three interfaces: the first interface connects to the hydraulic station 70, the second interface connects to the pressure-holding pipeline 40, and the third interface connects to the quick-response pipeline 60. Internally, it features an adjustable throttle orifice or needle valve structure, allowing for manual adjustment or electric actuator control of the opening degree, thereby precisely distributing the hydraulic oil flow ratio from the hydraulic station 70 and adjusting the flow rate of each branch. During startup, the three-way throttle valve 50 prioritizes directing high-pressure oil to the quick-response pipeline 60, enabling the hydraulic oil to quickly enter the cylinder of the disc brake 10, pushing the piston to move and achieving rapid brake release. During normal operation, it primarily uses the pressure-holding pipeline 40 for minor oil replenishment to maintain constant system pressure. When braking is required, the three-way throttle valve 50 switches channels, guiding the hydraulic oil in the disc brake 10 back to the oil tank via the quick-response pipeline 60, achieving rapid pressure relief and brake engagement.

[0019] It should be noted that pressure gauges 80 are installed on both the pressure-holding line 40 and the quick-response line 60. The oil pressure on the two lines can be determined by observing the readings on the pressure gauges 80, thus allowing for more precise adjustment of the three-way throttle valve 50. Alternatively, a flow meter can be used instead of the pressure gauges 80 to achieve the same purpose.

[0020] The components are connected by standard hydraulic joints and high-pressure hoses or welded steel pipes to form a closed hydraulic circuit. The entire system has a compact layout, with the three-way throttle valve 50 installed close to the control panel 10 to shorten the pipeline length and reduce response delay.

[0021] This technical solution enhances the hydraulic system's dynamic control capability for the gate's movement by establishing a pressure gradient between the fast response line 60 and the pressure holding line 40. The higher oil pressure is configured in the fast response line 60, which handles instantaneous power transmission, providing stronger driving force during gate opening and closing, thereby accelerating the flow rate of hydraulic oil and improving execution efficiency. Meanwhile, the pressure holding line 40 maintains a relatively lower pressure level to meet the system's stable pressure holding requirements during operation. This differentiated pressure design achieves a refined division of functional paths, enhancing the overall system response performance.

[0022] Through the above technical solution, in situations where the control panel requires rapid action, the higher oil pressure within the fast-response pipeline 60 generates greater hydraulic pressure drive, significantly shortening the hydraulic oil charging and discharging time, thereby accelerating the response speed of opening and closing the control panel. Especially in emergencies such as sudden power outages or check valve failures, the high-pressure fast-response pipeline can quickly establish the back pressure differential required for braking, prompting the hydraulic oil to be rapidly discharged from the control panel cavity. This allows the brake shoe 12 to complete the pressing action on the brake disc 11 within 2 seconds, effectively preventing belt slippage and cargo rollover accidents caused by delayed braking of the belt conveyor. This pressure-level configuration strategy reflects the design concept of allocating resources on demand for different functional paths, improving the system's safety redundancy and emergency response capabilities.

[0023] In addition, a backstop is connected to the rotating shaft of the belt conveyor, providing mechanical anti-reverse protection for the shaft. The backstop is a rigid or friction-type mechanical locking device. Its main structure includes a housing, a ratchet assembly, and a drive pawl or roller assembly. This device is fixedly installed on the main rotating shaft of the belt conveyor via a keyed connection, spline connection, or interference fit, and can rotate synchronously with the shaft. When the conveyor is running normally, the overrunning clutch mechanism inside the backstop allows the shaft to rotate in one direction forward; however, when the equipment stops or a reverse trend occurs, the backstop automatically triggers a locking action, rigidly constraining the rotating shaft to the frame, thereby preventing the rollers and belt from reversing and slipping.

[0024] In one embodiment, a filter is also installed on the pipeline between the three-way throttle valve 50 and the hydraulic station 70. The addition of a filter enhances the hydraulic system's ability to control the cleanliness of the hydraulic fluid, thereby ensuring the stable operation of key control components. As an auxiliary purification unit in the hydraulic system, the filter is mainly used to intercept metal shavings, sealing material debris, dust particles, and other insoluble contaminants that may be carried by the hydraulic oil during circulation. If these impurities are not effectively removed, they are prone to depositing at the throttle orifice or adhering to the valve core surface under high pressure and high-speed flow conditions, leading to delayed action and inaccurate response of the three-way throttle valve, or even valve jamming, thus affecting the opening and braking timing accuracy of the entire gate system.

Claims

1. A hydraulic system for the disc brake of a waste rock removal belt conveyor, characterized in that, Including a disc brake (10) installed on a belt conveyor; The disc brake (10) includes brake shoes (12) and brake disc (11) that are coaxially arranged with the drum of the belt conveyor. The control panel (10) is connected to a fast response line (60), which is connected to a three-way throttle valve (50). The three-way throttle valve (50) is also connected to an accumulator (30) via a pressure-holding line (40). The three-way throttle valve (50) is also connected to the hydraulic station (70).

2. The hydraulic system for the disc brake of a waste rock removal belt conveyor as described in claim 1, characterized in that, The oil pressure in the fast response line (60) is greater than the oil pressure in the pressure holding line (40).

3. The hydraulic system for the disc brake of a waste rock removal belt conveyor as described in claim 2, characterized in that, The belt inclination angle of the belt conveyor is greater than 16°.

4. The hydraulic system for the disc brake of a waste rock removal belt conveyor as described in claim 3, characterized in that, It also includes a backstop connected to the rotating shaft of the belt conveyor.

5. The hydraulic system for the disc brake of a waste rock removal belt conveyor as described in claim 4, characterized in that, A filter is also installed on the pipeline between the three-way throttle valve (50) and the hydraulic station (70).

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