A jumbo auxiliary boom luffing hydraulic control system
Patent Information
- Application Number
- CN202521589659.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-29
- Publication Date
- 2026-09-11
- Estimated Expiration
- 2035-07-29
AI Technical Summary
凿岩台车上的辅臂通常安装在凿岩台车的主支撑臂两侧，经由俯仰油缸负责控制辅臂的俯仰运动，辅臂的末端安装用于载人的吊篮（作业平台），通过载人进而方便的对凿岩机的头部进行检修，或者安装钻杆等装置，辅助人工作业，实现高效、精准的多角度作业范围，扩大作业范围；但是，存在凿岩台车的辅臂举升之后是否能够安全下俯的安全隐患问题
该凿岩台车辅臂俯仰液压控制系统，其操作简单，检修方便，能够保证凿岩台车的辅臂在不同角度或高度作业时的安全性，使凿岩台车的辅臂实现多角度的作业范围，安全性更高，降低设备故障率和维护成本，实现高效化作业，具有良好的推广应用价值。
Smart Images
Figure CN224742641U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of hydraulic control technology for rock drilling rigs, and in particular relates to a hydraulic control system for the pitching of the auxiliary arm of a rock drilling rig. Background Technology
[0002] A rock drilling rig is a type of rock drilling equipment used in tunnel and underground engineering projects. It can move and support multiple rock drills simultaneously for drilling operations. The working mechanism mainly consists of a thruster, drill arm, slewing mechanism, and translation mechanism. The auxiliary boom on the rock drilling rig is usually installed on both sides of the main support boom. The pitching movement of the auxiliary boom is controlled by a pitch cylinder. A personnel basket (working platform) is installed at the end of the auxiliary boom, allowing for convenient maintenance of the rock drill head or installation of drill rods and other devices, assisting manual operations and achieving efficient and precise multi-angle working range, thus expanding the working area. However, there is a safety concern regarding whether the auxiliary boom of the rock drilling rig can safely lower itself after being raised. Summary of the Invention
[0003] To address the aforementioned problems, the purpose of this utility model is to provide a hydraulic control system for the pitch of the auxiliary boom of a rock drilling rig, which enables the auxiliary boom of the rock drilling rig to achieve a multi-angle working range.
[0004] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: A hydraulic control system for the pitch of an auxiliary boom on a rock drilling rig includes a multi-way valve, a left pitch cylinder, a right pitch cylinder, a first check valve, a second check valve, a first ball valve, and a second ball valve. Port P of the multi-way valve is connected to a variable displacement pump, port LS is connected to the load-sensitive control port of the variable displacement pump, and port R is connected to a hydraulic radiator. Port A3 of the multi-way valve is connected to the rodless chamber of the left pitch cylinder, port B3 is connected to the rod chamber of the left pitch cylinder, port A4 is connected to the rodless chamber of the right pitch cylinder, port B4 is connected to the rod chamber of the right pitch cylinder, and port T is connected back to the oil tank. Port C of the left pitch cylinder is connected to the inlet of the second check valve, and port C of the right pitch cylinder is connected to the inlet of the first check valve. The outlets of the first and second check valves are connected to the inlets of the first and second ball valves, and the outlets of the first and second ball valves are connected back to the oil tank.
[0005] Due to the adoption of the technical solution described above, this utility model has the following advantages: The hydraulic control system for the auxiliary boom of this rock drilling rig is simple to operate and easy to maintain. It can ensure the safety of the auxiliary boom when it operates at different angles or heights, enabling the auxiliary boom of the rock drilling rig to achieve a multi-angle operating range, thus improving safety, reducing equipment failure rate and maintenance costs, and achieving high-efficiency operation. It has good value for promotion and application. Attached Figure Description
[0006] Figure 1 This is a schematic diagram of the hydraulic control system for the auxiliary boom pitch of the rock drilling rig of this utility model. Figure 2 This is the main view of the auxiliary arm and pitch cylinder of the rock drilling rig of this utility model. Figure 3 yes Figure 2 A top view of the auxiliary boom and pitch cylinder of the rock drilling rig. Figure 4 yes Figure 2 Side view of the auxiliary boom and pitch cylinder of the rock drilling rig; In the diagram: 1 - multi-way valve; 2 - left pitch cylinder; 3 - right pitch cylinder; 4 - first check valve; 5 - second check valve; 6 - first ball valve; 7 - second ball valve; 8 - basket; 9 - auxiliary boom. Detailed Implementation
[0007] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments.
[0008] like Figure 2 , 3 As shown in Figure 4, on the auxiliary arm of the existing rock drilling rig, the left pitch cylinder 2 and the right pitch cylinder 3 are symmetrically arranged on both sides of the auxiliary arm 9, forming an angle of 30 to 45° with the main axis of the auxiliary arm. They are connected to the auxiliary arm by a pin shaft using an ear-type mounting structure. The end of the auxiliary arm 9 is equipped with a basket 8.
[0009] like Figure 1 As shown, the hydraulic control system for the boom pitch of this rock drilling rig includes a multi-way valve 1, a left pitch cylinder 2, a right pitch cylinder 3, a first check valve 4, a second check valve 5, a first ball valve 6, and a second ball valve 7. Port P of the multi-way valve 1 is connected to a variable displacement pump, port LS is connected to the load-sensitive control port of the variable displacement pump, and port R is connected to the hydraulic radiator. Port A3 of the multi-way valve 1 is connected to the rodless chamber of the left pitch cylinder 2, and port B3 is connected to the rod chamber of the left pitch cylinder 2. Oil port A4 is connected to the rodless chamber of the right pitch cylinder 3, oil port B4 is connected to the rod chamber of the right pitch cylinder 4, and oil port T is connected back to the oil tank; oil port C of the left pitch cylinder 2 is connected to the inlet of the second check valve 5, oil port C of the right pitch cylinder 3 is connected to the inlet of the first check valve 4, the outlets of the first check valve 4 and the second check valve 5 are connected to the inlets of the first ball valve 6 and the second ball valve 7, and the outlets of the first ball valve 6 and the second ball valve 7 are connected and connected back to the oil tank.
[0010] This utility model relates to a hydraulic control system for the elevation of the auxiliary boom of a rock drilling rig, which has the following four working states: (1) When oil enters through port P of multi-way valve 1, electromagnet DT3 is energized in the forward direction and electromagnet DT4 is energized in the forward direction. Port P is connected to port A3 and port A4. Hydraulic oil enters the rodless chamber of left pitch cylinder 2 and right pitch cylinder 3 from working position a through port A3 and port A4 respectively, causing the piston rods of left pitch cylinder and right pitch cylinder to extend at the same time, pushing the auxiliary arm to pitch upward. (2) When oil enters through port P of multi-way valve 1, electromagnet DT3 is energized in reverse and electromagnet DT4 is energized in reverse. Port P is connected to port B3 and port B4. Hydraulic oil enters the rod chamber of left pitch cylinder 2 and right pitch cylinder 3 from working position b through port B3 and port B4 respectively, causing the piston rods of left pitch cylinder and right pitch cylinder to retract simultaneously, pushing the auxiliary arm to move downward. (3) When oil enters through port P of multi-way valve 1, electromagnet DT3 is energized in the forward direction and electromagnet DT4 is energized in the reverse direction. Port P is connected to port A3 and port B4. Hydraulic oil enters the rodless chamber of left pitch cylinder 2 from working position a through port A3 and the rod chamber of right pitch cylinder 3 from working position b through port B4, causing the piston rod of left pitch cylinder to extend and the piston rod of right pitch cylinder to retract, pushing the auxiliary arm to move to the right. (4) When oil enters through port P of multi-way valve 1, electromagnet DT3 is energized in reverse and electromagnet DT4 is energized in forward. Port P is connected to port B3 and port A4. Hydraulic oil enters the rod chamber of left pitch cylinder 2 from working position b through port B3 and enters the rodless chamber of right pitch cylinder 3 from working position a through port A4. This causes the piston rod of left pitch cylinder to retract and the piston rod of right pitch cylinder to extend, pushing the auxiliary arm to move to the left.
[0011] In the four normal operating states described above, both the first ball valve 6 and the second ball valve 7 are in the closed state. If an emergency occurs during operation and the hydraulic cylinder cannot descend from its raised position, the first or second ball valve should be opened to allow the left pitch cylinder 2 and the right pitch cylinder 3 to descend slowly, ensuring the safe landing of the personnel inside the suspended platform and reducing the risk of accidents.
[0012] The first ball valve 6 is installed on the basket 8, and the second ball valve 7 is installed on the frame. If there are workers in the basket, the first ball valve or the second ball valve is opened to descend slowly; if there are no workers in the basket, the first ball valve and the second ball valve are opened at the same time, which can descend quickly and reduce descent time. The corresponding operation is carried out according to the specific situation. After descent, it is convenient to troubleshoot and repair the machine, and ensure the safety of the workers.
[0013] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A hydraulic control system for the pitching of the auxiliary boom of a rock drilling rig, characterized in that: It includes a multi-way valve, a left pitch cylinder, a right pitch cylinder, a first check valve, a second check valve, a first ball valve, and a second ball valve. Port P of the multi-way valve is connected to a variable displacement pump, port LS is connected to the load-sensitive control port of the variable displacement pump, and port R is connected to a hydraulic radiator. Port A3 of the multi-way valve is connected to the rodless chamber of the left pitch cylinder, port B3 is connected to the rod chamber of the left pitch cylinder, port A4 is connected to the rodless chamber of the right pitch cylinder, port B4 is connected to the rod chamber of the right pitch cylinder, and port T is connected back to the oil tank. Port C of the left pitch cylinder is connected to the inlet of the second check valve, and port C of the right pitch cylinder is connected to the inlet of the first check valve. The outlets of the first and second check valves are connected to the inlets of the first and second ball valves, and the outlets of the first and second ball valves are connected back to the oil tank.