Rope adjusting safety valve group

Abstract

The utility model belongs to the technical field of safety brake control of mine hoists, and particularly discloses a rope adjusting safety valve group which comprises a rope adjusting electromagnetic directional valve for controlling a rope adjusting oil cylinder to act, a stop valve A and a stop valve B, and the stop valve A and the stop valve B are used for controlling an outlet oil way of a hydraulic station. An oil outlet of the stop valve B is connected with a brake on the fixed winding drum side of the double-drum elevator, an oil outlet of the stop valve A is connected with a brake on the movable winding drum side of the double-drum elevator and a port P of an oil drainage electromagnetic reversing valve, a port A of the oil drainage electromagnetic reversing valve is connected with a throttling valve, and a port T of the oil drainage electromagnetic reversing valve is connected with an oil drainage port. Interlocking is achieved through action feedback of the stop valve A and the stop valve B and the rope adjusting function of the control system, rope adjusting interlocking protection is safer and more reliable, the safety of the lifting system in the rope adjusting process is improved, and potential safety hazards caused by misoperation of mechanical, hydraulic and electrical systems of the lifting system to equipment operation are reduced.

Description

Technical Field

[0001] This utility model belongs to the field of safety braking control technology for mine hoists, and specifically discloses a rope adjustment safety valve group. Background Technology

[0002] Mine hoists are the lifeblood of mining operations, responsible for transporting minerals, equipment, materials, and personnel between the surface and underground. Their performance is crucial for mine safety; and the hoist's braking system is a key component affecting its safety performance. A twin-drum hoist uses two drums, a fixed drum and a traveling drum, to perform hoisting operations. During operation, the elongation of the wire rope can cause misalignment of the two hoisting containers, requiring adjustment of the relative positions of the two drums—a process known as "rope adjustment." This process is assisted by the opening and closing of the rope adjustment clutch.

[0003] Currently, most twin-drum hoists integrate a "rope adjusting" valve group into their hydraulic braking system to perform this function. While this is theoretically feasible, in practice, after the traveling drum clutch disengages, the fixed drum needs to be driven by a motor to complete the "rope adjusting" function. At this point, the hydraulic braking system needs to pressurize to open the fixed drum brake. In most current on-site "rope adjusting" operations, the hydraulic system typically achieves this function through the switching of an electromagnetic directional valve. However, electromagnetic directional valves pose safety hazards due to internal leakage or human error, potentially causing the traveling drum brake to open and leading to serious safety accidents such as "drum collapse." Summary of the Invention

[0004] To address the problems in the background art, this utility model discloses a rope adjustment safety valve assembly. Through electrical interlocking and a bypass oil drain circuit, it ensures that the traveling drum brake will not open due to oil leakage when adjusting the rope on site, thus avoiding major safety accidents and preventing human error.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0006] A rope adjusting safety valve assembly includes a rope adjusting solenoid directional valve for controlling the action of a rope adjusting cylinder, and shut-off valves A and B for controlling the outlet oil circuit of a hydraulic station. The inlets of the rope adjusting solenoid directional valve, shut-off valve A, and shut-off valve B are respectively connected to the outlet of the hydraulic station. The outlet of the rope adjusting solenoid directional valve is connected to a rope adjusting clutch. The outlet of shut-off valve B is connected to the fixed drum side brake of a twin-drum hoist. The outlet of shut-off valve A is connected to the floating drum side brake of the twin-drum hoist and the P port of the drain solenoid directional valve. The A port of the drain solenoid directional valve is connected to a throttle valve, and the T port of the drain solenoid directional valve is connected to the drain port.

[0007] Furthermore, the rope adjustment safety valve assembly is equipped with filters between the oil inlets of shut-off valves A and B and the corresponding oil outlets of the hydraulic station, and the filters are used to filter the oil.

[0008] Furthermore, the rope adjustment safety valve assembly and the oil drain solenoid directional valve have a valve core displacement monitoring function, and the oil drain solenoid directional valve can send a signal of the oil drain solenoid directional valve's operation to the control system.

[0009] Furthermore, in the rope adjustment safety valve assembly, both shut-off valve A and shut-off valve B are manual shut-off valves. Shut-off valve A and shut-off valve B each include a sensor for monitoring the position of the handle. The sensor can provide feedback to the control system on the operation status of the corresponding shut-off valve.

[0010] Furthermore, the rope adjusting safety valve assembly includes an oil collecting block, which is used for component installation and forming an oil circuit. The rope adjusting solenoid directional valve, the oil drain solenoid directional valve, the throttle valve, the shut-off valve A, the shut-off valve B, and the filter are respectively installed on the oil collecting block.

[0011] Furthermore, the rope adjustment safety valve assembly is also equipped with a pressure testing connector and an oil unloading pipe on the oil collecting block, which are connected to the internal cavity of the oil collecting block.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This utility model relates to a rope-adjusting safety valve assembly, comprising a rope-adjusting solenoid directional valve for controlling the action of the rope-adjusting cylinder, and shut-off valves A and B for controlling the outlet oil circuit of the hydraulic station. The outlet of the rope-adjusting solenoid directional valve is connected to the rope-adjusting clutch. The outlet of shut-off valve B is connected to the fixed drum side brake of the twin-drum hoist. The outlet of shut-off valve A is connected to the floating drum side brake of the twin-drum hoist and the P port of the drain solenoid directional valve. The A port of the drain solenoid directional valve is connected to a throttle valve, and the T port of the drain solenoid directional valve is connected to the drain port. Interlocking is achieved through the action feedback of shut-off valves A and B and the rope-adjusting function of the control system. This rope-adjusting interlocking protection is safer and more reliable, improving the safety of the hoisting system during rope adjustment and reducing safety hazards caused by malfunctions or misoperations of the mechanical, hydraulic, and electrical systems of the hoisting system. While improving safety, it can also improve personnel work efficiency. This is of great significance for improving the safety and reliability of the original hydraulic braking system and increasing production efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of the rope adjustment safety valve assembly of this utility model;

[0015] Figure 2 This is a top view schematic diagram of the rope adjustment safety valve assembly of this utility model;

[0016] Figure 3 This is a schematic diagram of the hydraulic circuit of this utility model;

[0017] In the above diagram: 1-Rope adjusting solenoid directional valve; 2-Oil drain solenoid directional valve; 3-Throttle valve; 4-Stop valve; 4.1-Stop valve A; 4.2-Stop valve B; 5-Filter; 6-Pipe fitting; 7-Oil collection block; 8-Mounting base plate; 9-Oil unloading pipe; 10-Pressure test fitting. Detailed Implementation

[0018] To better understand this utility model, the following embodiments further illustrate the content of this utility model, but the content of this utility model is not limited to the following embodiments.

[0019] Combined with appendix Figure 1-3 This invention details a rope-adjusting safety valve assembly, comprising a rope-adjusting solenoid directional valve 1 for controlling the action of the rope-adjusting cylinder and a shut-off valve 4 for controlling the outlet oil circuit of a hydraulic station. The shut-off valve 4 includes shut-off valve A4.1 and shut-off valve B4.2. The oil inlets of the rope-adjusting solenoid directional valve 1, shut-off valve A4.1, and shut-off valve B4.2 are respectively connected to the oil outlets P3, P1, and P2 of the hydraulic station. This rope-adjusting safety valve assembly, together with the original hydraulic station, constitutes the hydraulic braking system of a twin-drum hoist, providing braking and rope-adjusting functions for the twin-drum hoist. The oil outlet of the rope-adjusting solenoid directional valve 1 is connected to the rope-adjusting clutch, and the shut-off valve B4.2... The oil outlet of the valve is connected to the fixed drum side brake of the twin-drum hoist. The oil outlet of the shut-off valve A4.1 is connected to the traveling drum side brake of the twin-drum hoist and the P port of the drain solenoid directional valve 2, respectively. That is, the P port of the drain solenoid directional valve 2 is directly connected to the traveling drum side brake, and is not affected by the state of the manual directional shut-off valve A4.1, thus avoiding the impact of manual directional valve misoperation. The A port of the drain solenoid directional valve 2 is connected to the throttle valve 3 for flow regulation, and the T port of the drain solenoid directional valve 2 is connected to the drain port to avoid the formation of "oil trapping" phenomenon and affect the electromagnetic valve. The reliable operation of the valve ensures that during rope adjustment, the oil drain solenoid directional valve 2 is de-energized, keeping the traveling drum brake in a constant oil draining state. This prevents the traveling drum disc brake from opening due to "oil leakage" or malfunction of the shut-off valve, thus avoiding major safety accidents and human error. It also fundamentally improves the safety and reliability of the hydraulic braking system for rope adjustment. However, it should be noted that the control system used with the rope adjustment safety valve assembly of this invention adopts existing technology and is not an innovation of this invention. Therefore, the control system will not be described in detail.

[0020] As an optional design, the rope adjustment safety valve assembly is preferably provided with filters 5 between the oil inlets of the shut-off valves A4.1 and B4.2 and the corresponding oil outlets of the hydraulic station. The filters 5 are used to filter the oil.

[0021] As an optional design, the rope adjustment safety valve assembly is preferred, and the oil drain solenoid directional valve 2 has a valve core displacement monitoring function. The oil drain solenoid directional valve 2 can feed back the signal of the operation of the oil drain solenoid directional valve 2 to the control system.

[0022] As an optional design, the rope adjustment safety valve assembly is preferred, wherein both shut-off valves A4.1 and B4.2 are manual shut-off valves, and each of shut-off valves A4.1 and B4.2 includes a sensor for monitoring the position of the handle, and the sensor can provide feedback to the control system on the operation status of the corresponding shut-off valve.

[0023] As an optional design, the preferred rope adjustment safety valve assembly includes an oil collection block 7, which is used for component installation and forming an oil circuit. An installation base plate 8 is provided below the oil collection block 7. The rope adjustment solenoid directional valve 1, the oil drain solenoid directional valve 2, the throttle valve 3, the shut-off valve A4.1, the shut-off valve B4.2, and the filter 5 are respectively installed on the oil collection block 7.

[0024] As an optional design, the rope adjustment safety valve assembly is preferred. The oil collecting block 7 is also provided with a pipe joint 6, a pressure testing joint 10 and an oil discharge pipe 9 that are connected to the internal cavity of the oil collecting block 7. The pipe joint 6 is used to connect to the hoist disc brake, the pressure testing joint 10 is used to connect to an external pressure testing device to measure the internal oil pressure of the internal cavity of the oil collecting block 7, and the oil discharge pipe 9 extends downward through the mounting base plate 8. The oil in the internal cavity of the oil collecting block 7 can be discharged into the oil tank through the oil discharge pipe 9.

[0025] The working process of this utility model is as follows:

[0026] This utility model's rope-adjusting safety valve assembly interlocks with the rope-adjusting function of the control system through the action feedback of stop valves A4.1 and B4.2. When the twin-drum hoist is in rope-adjusting function, the de-energization of the oil drain solenoid directional valve 2 closes the traveling drum brake, preventing the traveling drum from rotating. When the twin-drum hoist is running and the rope-adjusting function is switched, the action status of the oil drain solenoid directional valve 2 is fed back to interlock the next operation of the control system, preventing accidents from occurring.

[0027] During normal lifting operations, the oil drain solenoid directional valve 2 is energized. The oil drain solenoid directional valve 2 monitors the valve core position through the valve core displacement monitoring function and feeds it back to the control system. At the same time, the shut-off valves A4.1 and B4.2 feed back to the control system through the sensors monitoring the position of their handles. If the position monitoring of shut-off valves A4.1 and B4.2 is found to be open, the control system determines that the lifting system is allowed to operate. At this time, the lifting system can operate normally and perform lifting and lowering operations.

[0028] When the control system issues the rope adjustment function command, the oil drain solenoid directional valve 2 is de-energized. At this time, the traveling drum side brake of the twin-drum hoist will be in the oil draining state through the oil drain solenoid directional valve 2, that is, the traveling drum side brake is in the closed and locked state. At the same time, the position status of the stop valve A4.1 and the stop valve B4.2 is detected to be open. Then the feedback control system allows rope adjustment. The action of the oil drain solenoid directional valve 2 forces the traveling drum brake to drain oil, ensuring that there will be no slippage accident caused by control disorder or human error during the rope adjustment process.

[0029] The rope adjustment safety valve group of this utility model provides safer and more reliable rope adjustment interlock protection, improves the safety of the hoisting system during rope adjustment, and reduces the safety hazards caused by malfunctions or misoperations of the hoisting system's mechanical, hydraulic, and electrical systems.

[0030] The above description is only an application implementation of this utility model, but the protection scope of this utility model is not limited thereto and cannot be used to limit the scope of rights of this utility model. Any equivalent changes made according to the technical solution of this utility model should be included within the protection scope of this utility model.

Claims

1. A rope-adjusting safety valve assembly, characterized in that: The system includes a rope-adjusting solenoid directional valve for controlling the movement of the rope-adjusting cylinder, and shut-off valves A and B for controlling the outlet oil circuit of the hydraulic station. The inlets of the rope-adjusting solenoid directional valve, shut-off valve A, and shut-off valve B are respectively connected to the outlet of the hydraulic station. The outlet of the rope-adjusting solenoid directional valve is connected to the rope-adjusting clutch. The outlet of shut-off valve B is connected to the fixed drum side brake of the twin-drum hoist. The outlet of shut-off valve A is connected to the floating drum side brake of the twin-drum hoist and the P port of the drain solenoid directional valve. The A port of the drain solenoid directional valve is connected to the throttle valve, and the T port of the drain solenoid directional valve is connected to the drain port.

2. The rope-adjusting safety valve assembly according to claim 1, characterized in that: A filter is installed between the oil inlet of shut-off valve A and shut-off valve B and the corresponding oil outlet of the hydraulic station. The filter is used to filter the oil.

3. The rope-adjusting safety valve assembly according to claim 1 or 2, characterized in that: The oil drain solenoid directional valve has a valve core displacement monitoring function and can send a signal of the oil drain solenoid directional valve's operation to the control system.

4. The rope-adjusting safety valve assembly according to claim 3, characterized in that: Both shut-off valve A and shut-off valve B are manual shut-off valves. Each shut-off valve A and shut-off valve B includes a sensor for monitoring the position of the handle. The sensor can provide feedback to the control system on the operation status of the corresponding shut-off valve.

5. The rope-adjusting safety valve assembly according to claim 3, characterized in that: It includes an oil collection block, which is used for component installation and forming an oil circuit. The solenoid directional valve for adjusting the rope, the solenoid directional valve for draining oil, the throttle valve, the shut-off valve A, the shut-off valve B and the filter are respectively installed on the oil collection block.

6. The rope-adjusting safety valve assembly according to claim 5, characterized in that: The oil collecting block is also equipped with a pressure testing connector and an oil unloading pipe that are connected to the internal cavity of the oil collecting block.

Images