阅读说明：本技术 往复移动设备准确定位停车控制系统 (Accurate positioning parking control system for reciprocating equipment ) 是由 向和平 郭宏 胡学忠 李建阳 田景钢 唐家扬 于 2021-08-26 设计创作，主要内容包括：本发明涉及往复移动设备,本发明往复移动设备准确定位停车控制系统包括激光测距仪、PLC控制器和往复移动设备液压控制单元,所述往复移动设备液压控制单元包括比例换向阀,通过激光测距仪测量往复移动设备的位置,PLC控制器根据往复移动设备的位置与预设的停车位置之间的距离控制比例换向阀的阀芯开口大小,从而控制往复移动设备在预设的停车位置上停车,解决了往复移动设备停车位置不准确且处理位置检测元件故障困难的问题,本发明适用于由液压马达的转动而移动的往复移动设备。(The invention relates to a reciprocating device, in particular to a precise positioning parking control system of the reciprocating device, which comprises a laser range finder, a PLC (programmable logic controller) and a hydraulic control unit of the reciprocating device, wherein the hydraulic control unit of the reciprocating device comprises a proportional reversing valve, the position of the reciprocating device is measured by the laser range finder, and the PLC controls the size of a valve core opening of the proportional reversing valve according to the distance between the position of the reciprocating device and a preset parking position, so that the reciprocating device is controlled to park at the preset parking position, the problems of inaccurate parking position of the reciprocating device and difficulty in processing the fault of a position detection element are solved, and the precise positioning parking control system is suitable for the reciprocating device which moves by the rotation of a hydraulic motor.)

1. The accurate positioning parking control system for the reciprocating equipment is characterized by comprising a laser range finder, a PLC (programmable logic controller) and a hydraulic control unit for the reciprocating equipment, wherein the hydraulic control unit for the reciprocating equipment comprises a proportional reversing valve (2); the laser range finder is connected with the PLC controller and used for measuring the position of the reciprocating device, and the PLC controller controls the size of a valve core opening of the proportional directional valve according to the distance between the position of the reciprocating device and a preset parking position, so that the reciprocating device is controlled to park at the preset parking position.

2. The shuttle device accurate positioning parking control system according to claim 1, wherein the PLC controller controls the spool of the proportional directional valve to be fully opened when a distance between the position of the shuttle device and the preset parking position is greater than a preset deceleration distance, the PLC controller gradually decreases the spool opening of the proportional directional valve according to the distance between the position of the shuttle device and the preset parking position when the distance between the position of the shuttle device and the preset parking position is less than or equal to the preset deceleration distance, and the PLC controller controls the spool of the proportional directional valve to be fully closed when the position of the shuttle device coincides with the preset parking position.

3. The shuttle equipment accurate positioning parking control system according to claim 1 or 2, wherein the shuttle equipment hydraulic control unit further comprises a pressure reducing valve (1), a check valve (10), a shuttle valve (9), a first hydraulic control check valve (3), a second hydraulic control check valve (8), a first overflow valve (7), a second overflow valve (6), a first pipeline stop valve (4), a hydraulic motor (M) and a second pipeline stop valve (5);

when the reciprocating equipment moves towards a certain direction, the PLC controls the valve core of the proportional reversing valve (2) to be opened, so that the proportional reversing valve (2) is conducted, pressure oil flows to the first hydraulic control one-way valve (3) from the inlet (P) through the pressure reducing valve (1) through the proportional reversing valve (2), the second hydraulic control one-way valve (8) is opened, the pressure oil reaches the hydraulic motor (M) through the first hydraulic control one-way valve (3) through the first pipeline stop valve (4), part of the pressure oil flows back through the oil discharge port (Y) of the hydraulic motor, and the other part of the pressure oil flows back through the second pipeline stop valve (5), the second hydraulic control one-way valve (8), the proportional reversing valve (2), the one-way valve (10) and the outlet (T) in sequence; when the pressure oil flowing out of the first hydraulic control one-way valve (3) exceeds the set pressure of the first overflow valve (7), the first overflow valve (7) is opened, and part of the pressure oil flowing out of the first hydraulic control one-way valve (3) flows to the second hydraulic control one-way valve (8) through the first overflow valve (7);

when the reciprocating equipment moves in the opposite direction, the PLC controls the valve core of the proportional reversing valve (2) to be opened, so that the proportional reversing valve (2) is conducted, pressure oil flows to the second hydraulic control one-way valve (8) from the inlet (P) through the pressure reducing valve (1) through the proportional reversing valve (2), the first hydraulic control one-way valve (3) is opened, the pressure oil reaches the hydraulic motor (M) through the second pipeline stop valve (5) through the second hydraulic control one-way valve (8), part of the pressure oil flows back through the oil discharge port (Y) of the hydraulic motor, and the other part of the pressure oil flows back through the first pipeline stop valve (4), the first hydraulic control one-way valve (3), the proportional reversing valve (2), the one-way valve (10) and the outlet (T) in sequence; when the pressure oil flowing out of the second hydraulic control one-way valve (8) exceeds the set pressure of the second overflow valve (6), the second overflow valve (6) is opened, and part of the pressure oil flowing out of the second hydraulic control one-way valve (8) flows to the first hydraulic control one-way valve (3) through the second overflow valve (6);

in the process of moving the reciprocating equipment, pressure oil flowing out of the proportional reversing valve (2) flows to the pressure reducing valve (1) through the shuttle valve (9), the shuttle valve (9) detects load pressure and compares the load pressure with the outlet pressure of the pressure reducing valve (1), and the outlet pressure of the pressure reducing valve (1) is adjusted in time to enable the outlet pressure of the pressure reducing valve (1) to be constant;

when the reciprocating equipment reaches a parking position, the PLC controls the valve core of the proportional reversing valve to be fully closed, at the moment, the first hydraulic control one-way valve (3) and the second hydraulic control one-way valve (8) are both closed, and the hydraulic motor (M) stops rotating.

Technical Field

The invention relates to a reciprocating device, in particular to a parking control system for accurately positioning the reciprocating device.

Background

In industrial equipment application, a reciprocating device is often needed to meet industrial production requirements, the moving distance of the reciprocating device ranges from 5 meters to 30 meters, and the device is required to be accurately positioned and stopped in the reciprocating process. The existing technical scheme needs to install a travel switch or a displacement encoder on a reciprocating device body, and a position detection element is often out of work or damaged in practical application, so that the parking position of the reciprocating device is inaccurate, and the fault of the position detection element is difficult to process, so that safety accidents are easy to happen.

Disclosure of Invention

The technical problems solved by the invention are as follows: the parking control system for accurately positioning the reciprocating equipment solves the problems that the parking position of the reciprocating equipment is inaccurate and the fault of a position detection element is difficult to process.

The invention adopts the technical scheme for solving the technical problems that: the accurate positioning parking control system for the reciprocating equipment comprises a laser range finder, a PLC (programmable logic controller) and a hydraulic control unit for the reciprocating equipment, wherein the hydraulic control unit for the reciprocating equipment comprises a proportional reversing valve; the laser range finder is connected with the PLC controller and used for measuring the position of the reciprocating device, and the PLC controller controls the size of a valve core opening of the proportional directional valve according to the distance between the position of the reciprocating device and a preset parking position, so that the reciprocating device is controlled to park at the preset parking position.

Further, when the distance between the position of the reciprocating device and the preset parking position is greater than the preset braking deceleration distance, the PLC controller controls the valve core of the proportional reversing valve to be fully opened, when the distance between the position of the reciprocating device and the preset parking position is less than or equal to the preset braking deceleration distance, the PLC controller gradually reduces the valve core opening of the proportional reversing valve according to the distance between the position of the reciprocating device and the preset parking position, and when the position of the reciprocating device is overlapped with the preset parking position, the PLC controller controls the valve core of the proportional reversing valve to be fully closed.

Furthermore, the hydraulic control unit of the reciprocating equipment also comprises a pressure reducing valve, a one-way valve, a shuttle valve, a first hydraulic control one-way valve, a second hydraulic control one-way valve, a first overflow valve, a second overflow valve, a first pipeline stop valve, a hydraulic motor and a second pipeline stop valve;

when the reciprocating equipment moves towards a certain direction, the PLC controls the valve core of the proportional reversing valve to be opened, so that the proportional reversing valve is conducted, pressure oil flows to the first hydraulic control one-way valve from the inlet through the pressure reducing valve through the proportional reversing valve, the second hydraulic control one-way valve is opened, the pressure oil reaches the hydraulic motor through the first pipeline stop valve through the first hydraulic control one-way valve, part of the pressure oil flows back through the oil discharge port of the hydraulic motor, and the other part of the pressure oil flows back through the second pipeline stop valve, the second hydraulic control one-way valve, the proportional reversing valve, the one-way valve and the outlet in sequence; when the pressure oil flowing out of the first hydraulic control one-way valve exceeds the set pressure of the first overflow valve, the first overflow valve is opened, and part of the pressure oil flowing out of the first hydraulic control one-way valve flows to the second hydraulic control one-way valve through the first overflow valve;

when the reciprocating equipment moves in the reverse direction, the PLC controls the valve core of the proportional reversing valve to be opened, so that the proportional reversing valve is conducted, pressure oil flows to the second hydraulic control one-way valve from the inlet through the pressure reducing valve through the proportional reversing valve, the first hydraulic control one-way valve is opened, the pressure oil reaches the hydraulic motor through the second hydraulic control one-way valve through the second pipeline stop valve, part of the pressure oil flows back through the oil discharge port of the hydraulic motor, and the other part of the pressure oil flows back through the first pipeline stop valve, the first hydraulic control one-way valve, the proportional reversing valve, the one-way valve and the outlet in sequence; when the pressure oil flowing out of the second hydraulic control one-way valve exceeds the set pressure of the second overflow valve, the second overflow valve is opened, and part of the pressure oil flowing out of the second hydraulic control one-way valve flows to the first hydraulic control one-way valve through the second overflow valve;

in the process of moving the reciprocating equipment, pressure oil flowing out of the proportional reversing valve flows to the pressure reducing valve through the shuttle valve, the shuttle valve detects load pressure and compares the load pressure with the outlet pressure of the pressure reducing valve, and the outlet pressure of the pressure reducing valve is adjusted in time to ensure that the outlet pressure of the pressure reducing valve is constant;

when the reciprocating equipment reaches a parking position, the PLC controls the valve core of the proportional reversing valve to be fully closed, at the moment, the first hydraulic control one-way valve and the second hydraulic control one-way valve are both closed, and the hydraulic motor stops rotating.

The invention has the beneficial effects that: the accurate positioning parking control system for the reciprocating device measures the position of the reciprocating device through the laser range finder, and the PLC controls the size of the valve core opening of the proportional reversing valve according to the distance between the position of the reciprocating device and the preset parking position, so that the reciprocating device is controlled to park at the preset parking position, and the problems that the parking position of the reciprocating device is inaccurate and the position detection element fault is difficult to process are solved.

Drawings

Fig. 1 is a schematic diagram of a hydraulic control unit of a shuttle in an accurate positioning parking control system of the shuttle according to the present invention, in which fig. 1 shows a pressure reducing valve, 2 shows a proportional directional valve, 3 shows a first pilot operated check valve, 4 shows a first line cut-off valve, 5 shows a second line cut-off valve, 6 shows a second overflow valve, 7 shows a first overflow valve, 8 shows a second pilot operated check valve, 9 shows a shuttle valve, 10 shows a check valve, M shows a hydraulic motor, P shows a pressure oil inlet, T shows a pressure oil outlet, and Y shows a hydraulic motor oil discharge port.

Detailed Description

The accurate positioning and parking control system for the reciprocating equipment comprises a laser range finder, a PLC (programmable logic controller) and a hydraulic control unit for the reciprocating equipment, wherein the hydraulic control unit for the reciprocating equipment comprises a proportional reversing valve; the laser range finder is connected with the PLC controller and used for measuring the position of the reciprocating device, and the PLC controller controls the size of a valve core opening of the proportional directional valve according to the distance between the position of the reciprocating device and a preset parking position, so that the reciprocating device is controlled to park at the preset parking position.

Further, when the distance between the position of the reciprocating device and the preset parking position is greater than the preset deceleration distance, the PLC controller controls the valve core of the proportional reversing valve to be fully opened, when the distance between the position of the reciprocating device and the preset parking position is less than or equal to the preset deceleration distance, the PLC controller gradually reduces the valve core opening of the proportional reversing valve according to the distance between the position of the reciprocating device and the preset parking position, and when the position of the reciprocating device is overlapped with the preset parking position, the PLC controller controls the valve core of the proportional reversing valve to be fully closed.

Further, the hydraulic control unit of the reciprocating device is shown in figure 1 and comprises a pressure reducing valve 1, a proportional reversing valve 2, a check valve 10, a shuttle valve 9, a first hydraulic control check valve 3, a second hydraulic control check valve 8, a first overflow valve 7, a second overflow valve 6, a first pipeline stop valve 4, a hydraulic motor M and a second pipeline stop valve 5;

when the reciprocating equipment moves towards a certain direction, the PLC controls the valve core of the proportional reversing valve 2 to be opened, so that the proportional reversing valve 2 is conducted, pressure oil flows from the inlet P to the first hydraulic control one-way valve 3 through the pressure reducing valve 1 and the proportional reversing valve 2, the second hydraulic control one-way valve 8 is opened, the pressure oil reaches the hydraulic motor M through the first hydraulic control one-way valve 3 and the first pipeline stop valve 4, part of the pressure oil flows back through the oil discharge port Y of the hydraulic motor, and the other part of the pressure oil flows back through the second pipeline stop valve 5, the second hydraulic control one-way valve 8, the proportional reversing valve 2, the one-way valve 10 and the outlet T in sequence; when the pressure oil flowing out of the first hydraulic control one-way valve 3 exceeds the set pressure of the first overflow valve 7, the first overflow valve 7 is opened, and part of the pressure oil flowing out of the first hydraulic control one-way valve 3 flows to the second hydraulic control one-way valve 8 through the first overflow valve 7;

when the reciprocating equipment moves in the opposite direction, the PLC controls the valve core of the proportional reversing valve 2 to be opened, so that the proportional reversing valve 2 is conducted, pressure oil flows to the second hydraulic control one-way valve 8 from the inlet P through the pressure reducing valve 1 and the proportional reversing valve 2, the first hydraulic control one-way valve 3 is opened, the pressure oil reaches the hydraulic motor M through the second hydraulic control one-way valve 8 and the second pipeline stop valve 5, part of the pressure oil flows back through the oil discharge port Y of the hydraulic motor, and the other part of the pressure oil flows back through the first pipeline stop valve 4, the first hydraulic control one-way valve 3, the proportional reversing valve 2, the one-way valve 10 and the outlet T in sequence; when the pressure oil flowing out of the second hydraulic control one-way valve 8 exceeds the set pressure of the second overflow valve 6, the second overflow valve 6 is opened, and part of the pressure oil flowing out of the second hydraulic control one-way valve 8 flows to the first hydraulic control one-way valve 3 through the second overflow valve 6;

in the process of moving the reciprocating device, pressure oil flowing out of the proportional reversing valve 2 flows to the pressure reducing valve 1 through the shuttle valve 9, the shuttle valve 9 detects load pressure and compares the load pressure with the outlet pressure of the pressure reducing valve 1, and the outlet pressure of the pressure reducing valve 1 is adjusted in time to enable the outlet pressure of the pressure reducing valve 1 to be constant;

when the reciprocating equipment reaches a parking position, the PLC controls the valve core of the proportional reversing valve to be fully closed, at the moment, the first hydraulic control one-way valve 3 and the second hydraulic control one-way valve 8 are both closed, and the hydraulic motor M stops rotating and is locked.