A control system for smooth descent of pneumatic monorail crane
By designing a pneumatic monorail lifting stable downhill control system, using a uniform speed brake control unit and brake device, the problem of unstable brake during the downhill of the monorail lifting is solved, and safe and efficient downhill control is achieved.
Patent Information
- Application Number
- CN202110966416.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-08-23
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2041-08-23
AI Technical Summary
The brake unstable caused by inertial momentum during the downhill process of monorail lifting is prone to accidents. The control methods of the prior art are simple and prone to failure risk.
A pneumatic monorail lifting stable downhill control system is designed, including a uniform-speed brake control unit and a brake control unit. Through a uniform-speed brake control valve, pressure reducing valve, one-way valve and brake cylinder, a uniform-speed downhill is achieved, and through adjustable reduction The pressure valve adjusts the speed according to the slope and load.
The speed of the monorail lift is adjusted in real time during the downhill process to ensure safety and work efficiency, and avoid safety accidents caused by unstable brakes.
Smart Images
Figure CN113479230B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a pneumatic monorail crane steady downhill control system, belonging to the technical field of mining equipment. Background Art
[0002] Monorail cranes are widely used underground and are a common equipment for underground transportation. There are mainly pneumatic, hydraulic and battery-powered monorail cranes. When the monorail crane is running underground, it will encounter a downhill situation, that is, going down from a high point along a certain slope to a low point. The biggest problem with this downhill situation is the inertial impulse generated by the slope. Since the objects carried on the monorail crane weigh several tons, it is easy to cause accidents if they are not controlled. The control in the existing technology is very simple, that is, brake during the downhill process, then run, and then brake again. This structural design has a huge impact on the brakes, and if the brakes fail, an accident will occur. This is a hidden danger for underground operation and needs to be solved urgently. Summary of the invention
[0003] In order to solve this technical problem of the monorail crane, we designed a variety of solutions and finally came up with a pneumatic monorail crane smooth descent control system with reasonable design and stable and reliable operation.
[0004] To achieve the above-mentioned purpose, the technical means adopted by the present invention are: a pneumatic monorail smooth descent control system, including a uniform speed brake control unit, a brake control unit, a brake cylinder, and a brake device. The uniform speed brake control unit includes a uniform brake control valve, a pressure reducing valve, a one-way valve, a three-way valve, and a uniform brake switch. The brake control unit includes a brake control valve and a brake switch. The brake switch is connected to the control terminal of the brake control valve, the normally open end of the brake control valve is connected to the air outlet of the brake cylinder, the normally closed end of the brake control valve is connected to the air inlet of the uniform brake control valve, the normally closed end of the uniform brake control valve is connected to the pressure reducing valve, the pressure reducing valve is connected to the three-way valve through the one-way valve, the normally open end of the uniform brake control valve is connected to the three-way valve, the three-way valve is connected to the air inlet of the brake cylinder, the uniform brake switch is connected to the control end of the brake control valve, and the brake cylinder is installed on the brake device.
[0005] When working on the normal working surface, press the brake switch, the normally open end of the brake control valve is closed, and the normally closed end is opened. The gas or liquid enters the air inlet of the uniform brake control valve from the normally closed end, and enters the air inlet of the brake cylinder through the normally open end through the three-way valve. The brake cylinder drives the brake device to achieve braking, and the one-way valve prevents backflow at the three-way valve. When going downhill, first press the brake switch, and then press the uniform brake switch. At this time, the normally open end of the uniform brake control valve is closed, and the normally closed end is opened. After the pressure is reduced by the pressure reducing valve, the gas enters the brake cylinder through the one-way valve and the three-way valve. At this time, the braking force of the brake cylinder cannot stop the vehicle, but makes the brake device hold the brake track and run at a set uniform speed to achieve smooth descent. For different slopes, different running speeds can be set by adjusting the pressure reducing valve.
[0006] Furthermore, the pressure reducing valve is an adjustable pressure reducing valve.
[0007] As a preferred structural design of the braking device, the braking device includes an embracing brake frame, explosion-proof brake pads, and compression springs. A brake arm is hingedly installed on each side of the embracing brake frame. The explosion-proof brake pads are installed on the end faces of the brake arms located in the groove of the I-shaped rail. The compression spring is installed between the lower parts of the two brake arms. The telescopic rod of the brake cylinder is connected to the brake arm, wherein the compression spring is sleeved or not sleeved on the brake cylinder, and the brake cylinder is configured as a bidirectional telescopic cylinder or two single-rod cylinders.
[0008] Furthermore, the uniform brake control valve and the brake control valve are both two-position five-way valves.
[0009] Furthermore, two groups of the uniform speed braking control unit and the brake control unit are provided, but only one uniform braking switch and brake switch are provided. The uniform braking switch is respectively connected to the control terminals of the two uniform braking control valves, and the brake switch is respectively connected to the control terminals of the two brake control valves. Two brake cylinders are provided, which are respectively connected to the two groups of uniform speed braking control units and the brake control unit.
[0010] The beneficial effects of the present invention are:
[0011] 1. Through the cooperation of the uniform speed brake control unit and the brake device, the speed of the monorail crane can be adjusted in real time during the downhill slope, which completely solves the problem that the existing technology cannot control the downhill speed, the brake is unstable, and safety accidents are prone to occur;
[0012] 2. The adjustable pressure reducing valve can be adjusted according to the load and slope, controlling the downhill speed and descending at a constant speed, ensuring safety and work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The present invention is further described below in conjunction with the accompanying drawings and embodiments.
[0014] Figure 1 It is a structural schematic diagram of the present invention.
[0015] In the figure: 1. brake control valve, 2. brake switch, 3. uniform brake control valve, 4. pressure reducing valve, 5. check valve, 6. three-way valve, 7. uniform brake switch, 8. brake cylinder, 9. wrap-around brake frame, 10. explosion-proof brake pad, 11. compression spring. DETAILED DESCRIPTION
[0016] Example 1
[0017] like Figure 1The monorail crane smooth descent control device shown includes a uniform speed brake control unit, a brake control unit, a brake cylinder 8, and a brake device. The uniform speed brake control unit includes a uniform brake control valve 3, a pressure reducing valve 4, a one-way valve 5, a three-way valve 6, and a uniform brake switch 7. The brake control unit includes a brake control valve 1 and a brake switch 2. The brake switch 2 is connected to the control terminal of the brake control valve 1, the normally open end of the brake control valve 1 is connected to the outlet of the brake cylinder 8, the normally closed end of the brake control valve 1 is connected to the inlet of the uniform brake control valve 3, the normally closed end of the uniform brake control valve 3 is connected to the pressure reducing valve 4, the pressure reducing valve 4 is connected to the three-way valve 6 through the one-way valve 5, the normally open end of the uniform brake control valve 3 is connected to the three-way valve 6, the three-way valve 6 is connected to the inlet of the brake cylinder 8, and the uniform brake switch 2 is connected to the control end of the brake control valve 3.
[0018] The pressure reducing valve 4 adopts an adjustable pressure reducing valve, and the uniform brake control valve 3 and the brake control valve 1 both adopt a two-position five-way valve.
[0019] The brake device includes an embracing brake frame 9, an explosion-proof brake pad 10, and a compression spring 11. A brake arm is hingedly installed on both sides of the embracing brake frame 9. The explosion-proof brake pad 10 is installed on the end face of the brake arm located in the I-shaped track groove. The compression spring 11 is installed between the lower parts of the two brake arms. The telescopic rod of the brake cylinder 8 is connected to the brake arm. The brake cylinder 8 is a bidirectional telescopic cylinder. The advantage of the bidirectional telescopic cylinder is that it can control the movements of the two brake arms at the same time to ensure the consistency of the movements.
[0020] When working on the normal working surface, press the brake switch 2, the normally open end of the brake control valve 1 is closed, and the normally closed end is opened. The air enters the air inlet of the brake control valve from the normally closed end, and enters the air inlet of the brake cylinder 8 from the normally open end through the tee 6 to achieve point braking (that is, braking). The one-way valve 5 prevents backflow at the tee 6, and all the air flow enters the brake cylinder to ensure the braking force.
[0021] When going downhill, first press the brake switch 2, and then press the uniform brake switch 7. At this time, the normally open end of the uniform brake control valve 3 is closed, and the normally closed end is opened. After the pressure is reduced by the pressure reducing valve 4, the gas enters the brake cylinder 8 through the one-way valve 5 and the three-way 6. At this time, the braking force of the brake cylinder 8 cannot stop the vehicle. The compression spring plays a role in maintaining balance. The monorail crane runs at a uniform speed and achieves a smooth descent. By adjusting the pressure reducing valve 4, different slopes and different operating speeds can be achieved. The compression spring 11 can provide a supporting force when the brake cylinder 8 is working to prevent locking; when the uniform brake stops, it can also realize the active reset of the brake arm to normal.
[0022] Example 2
[0023] The difference from the first embodiment is that the brake cylinder 8 can also be two one-way cylinders, each connected to a brake arm. In this case, two groups of uniform speed brake control units and brake control units are used to control the brake cylinders connected to them respectively, but only one brake switch 2 and uniform brake switch 7 are needed, and the two-position five-way valve control signals are given to the two groups of uniform speed brake control units and brake control units at the same time.
[0024] Example 3
[0025] The difference from Example 1 is that the control mechanism and the controlled brake cylinder can be added to the existing pneumatic monorail crane's brake device.
[0026] Compared with the prior art, the present invention achieves the following technical advances:
[0027] 1. Through the cooperation of the uniform speed brake control unit and the brake device, the speed of the monorail crane can be adjusted in real time during the downhill slope, which completely solves the problem that the existing technology cannot control the downhill speed, the brake is unstable, and safety accidents are prone to occur;
[0028] 2. The adjustable pressure reducing valve can be adjusted according to the load and slope, controlling the downhill speed and descending at a constant speed, ensuring safety and work efficiency.
[0029] Although the specific embodiments of the present invention are described and illustrated in detail above, it should be pointed out that various equivalent changes and modifications can be made to the above embodiments based on the concept of the present invention. As long as the functional effects produced do not exceed the spirit covered by the specification, they should all be within the protection scope of the present invention.
Claims
1. A pneumatic monorail crane stable descent control system, Features: It includes a uniform speed brake control unit, a brake control unit, a brake cylinder, and a brake device. The uniform speed brake control unit includes a uniform brake control valve, a pressure reducing valve, a one-way valve, a three-way valve, and a uniform brake switch. The brake control unit includes a brake control valve and a brake switch. The brake switch is connected to the control terminal of the brake control valve, the normally open end of the brake control valve is connected to the air outlet of the brake cylinder, the normally closed end of the brake control valve is connected to the air inlet of the uniform brake control valve, the normally closed end of the uniform brake control valve is connected to the pressure reducing valve, the pressure reducing valve is connected to the three-way valve through the one-way valve, the normally open end of the uniform brake control valve is connected to the three-way valve, the three-way valve is connected to the air inlet of the brake cylinder, the uniform brake switch is connected to the control end of the brake control valve, and the brake cylinder is installed on the brake device.
2. According to claim 1, the pneumatic monorail crane steady descent control system, Features: When working on the normal working surface, press the brake switch, the normally open end of the brake control valve is closed, and the normally closed end is opened. The gas or liquid enters the air inlet of the uniform brake control valve from the normally closed end, and enters the air inlet of the brake cylinder through the normally open end through the three-way valve. The brake cylinder drives the brake device to achieve braking, and the one-way valve prevents backflow at the three-way valve. When going downhill, first press the brake switch, and then press the uniform brake switch. At this time, the normally open end of the uniform brake control valve is closed, and the normally closed end is opened. After the pressure is reduced by the pressure reducing valve, the gas enters the brake cylinder through the one-way valve and the three-way valve. At this time, the braking force of the brake cylinder cannot stop the vehicle, but makes the brake device hold the brake track and run at a set uniform speed to achieve smooth descent. For different slopes, different running speeds can be set by adjusting the pressure reducing valve.
3. According to claim 1, the pneumatic monorail crane steady descent control system, Features: The pressure reducing valve is an adjustable pressure reducing valve.
4. According to claim 1, the pneumatic monorail crane steady descent control system, Features: The brake device includes an embracing brake frame, an explosion-proof brake pad, and a compression spring. A brake arm is hingedly installed on each side of the embracing brake frame. The explosion-proof brake pad is installed on the end surface of the brake arm located in the I-shaped track groove. The compression spring is installed between the lower parts of the two brake arms. The telescopic rod of the brake cylinder is connected to the brake arm, wherein the compression spring is sleeved or not sleeved on the brake cylinder. The brake cylinder is configured as a two-way telescopic cylinder or two single-rod cylinders.
5. According to claim 1, the pneumatic monorail crane steady descent control system, Features: The uniform brake control valve and the brake control valve are both two-position five-way valves.
6. According to claim 1, the pneumatic monorail crane steady descent control system, Features: The uniform speed brake control unit and the brake control unit are both provided in two groups, but only one uniform brake switch and one brake switch are provided. The uniform brake switch is respectively connected to the control terminals of the two uniform brake control valves, and the brake switch is respectively connected to the control terminals of the two brake control valves. Two brake cylinders are provided, which are respectively connected to the two groups of uniform speed brake control units and the brake control unit.