Electro-hydraulic safety net

Abstract

The utility model provides an electro-hydraulic safety net which comprises a pressure switch on an electro-hydraulic power unit, the pressure switch is used for detecting the pressure of an oil way in a hydraulic power pump, and a PLC module can obtain signal feedback when hydraulic power exceeds specified pressure; an encoder is arranged on a transmission shaft connected with the electro-hydraulic power unit, the transmission shaft is in hard connection with the hydraulic power pump, and the PLC module can obtain the rotation angle of the movable net rack in real time; a travel switch is arranged on a base at the side part of the tail of the transmission shaft; the PLC module can judge whether the safety net is stuck or not from multiple dimensions on the basis of safety net state signals fed back by the pressure switch, the single-circle encoder and the travel switch; moreover, the safety net can be remotely controlled through an external control device, the opening and closing action of the safety net can be remotely operated, the safety net on-site workers do not need to be on duty, and the risk of the on-site workers is reduced; the external control device monitors and controls the safety net through the Ethernet and the like.

Description

Technical Field

[0001] The utility model relates to a safety net, in particular to an electro-hydraulic safety net. Background Art

[0002] Existing ship safety nets mostly require manual on-site monitoring of the lowering and erecting of the safety nets. For example, a utility model patent for a helicopter deck with a safety net with publication number CN218580509U is prone to failure, and the failure cannot be discovered in time, the maintainability is poor, and on-site staff are required to be on duty, which increases the risk of on-site staff. Utility Model Content

[0003] The utility model aims to provide an electro-hydraulic safety net.

[0004] In order to solve the above problems, the utility model provides an electro-hydraulic safety net, comprising:

[0005] Safety net;

[0006] A middle base and a side base connected to the bottom of the safety net, wherein the middle base and the side base are arranged at intervals;

[0007] A transmission shaft, the head end of which is passed through and fixed on the middle base; the tail end of which is passed through and fixed on the side base;

[0008] An electro-hydraulic power unit is arranged on the middle base, and the electro-hydraulic power unit comprises: a motor and a hydraulic power pump connected to the motor, and the head end of the transmission shaft is connected to the hydraulic power pump;

[0009] A pressure switch connected to the hydraulic power pump, used to detect the pressure of the oil circuit in the hydraulic power pump;

[0010] An encoder provided on the hydraulic power pump, for detecting the rotation angle of the safety net;

[0011] A travel switch arranged on the side base is used to detect whether the safety net is in place when it is laid down or erected;

[0012] PLC module, the pressure switch, encoder, travel switch and motor are connected;

[0013] An external control device is connected to the PLC module.

[0014] Furthermore, in the above-mentioned electro-hydraulic safety net, the encoder is a single-turn encoder.

[0015] Furthermore, in the above-mentioned electro-hydraulic safety network, the external control device is connected to a switch, and the switch is connected to the PLC module via a LAN interface.

[0016] Furthermore, in the above-mentioned electro-hydraulic safety network, the external control device is connected to the PLC module via an RS485 interface.

[0017] Furthermore, the above-mentioned electro-hydraulic safety network also includes: a touch screen connected to the PLC module via Ethernet.

[0018] Furthermore, in the above-mentioned electro-hydraulic safety network, the motor is connected to the PLC module through a relay group.

[0019] Furthermore, in the above-mentioned electro-hydraulic safety network, the relay group includes: a forward relay, a reverse relay and a locking relay.

[0020] Compared with the prior art, the utility model uses a pressure switch on the electro-hydraulic power unit to detect the pressure of the oil circuit in the hydraulic power pump. When the hydraulic power exceeds the specified pressure, the PLC module can obtain signal feedback; in addition, the utility model uses an encoder on the transmission shaft connected to the electro-hydraulic power unit, and the transmission shaft is hard-connected to the hydraulic power pump, and the PLC module can obtain the rotation angle of the dynamic grid in real time; in addition, a travel switch is used on the side base at the end of the transmission shaft; the PLC module can judge whether the safety net is stuck from multiple dimensions based on the status signal of the safety net that can be fed back by the pressure switch, the single-turn encoder and the travel switch; moreover, the utility model can remotely control the safety net through an external control device, realize the remote operation of the switching action of the safety net, and there is no need for on-site staff of the safety net to be on duty, thereby reducing the risk of on-site staff; and realize the external control device to monitor and control the safety net through Ethernet, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of an electro-hydraulic safety net according to an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the system connection of the electro-hydraulic safety network of one embodiment of the utility model;

[0023] Figure 3 This is a control connection diagram of an electro-hydraulic safety network according to an embodiment of the present utility model;

[0024] Figure 4 It is a schematic diagram of the alarm mode of the electro-hydraulic safety net according to one embodiment of the utility model. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] like Figures 1 to 3 As shown, the utility model provides an electro-hydraulic safety net, comprising:

[0027] Safety Net 1;

[0028] A middle base 2 and a side base 3 connected to the bottom of the safety net 1, wherein the middle base and the side base are arranged at intervals;

[0029] A transmission shaft, the head end of which is passed through and fixed on the middle base; the tail end of which is passed through and fixed on the side base;

[0030] An electro-hydraulic power unit 6 is arranged on the middle base, and the electro-hydraulic power unit includes: a motor and a hydraulic power pump connected to the motor, the head end of the transmission shaft is connected to the hydraulic power pump, and the hydraulic power pump drives the transmission shaft to rotate, thereby driving the safety net to stand up or fall down;

[0031] A pressure switch 5 connected to the hydraulic power pump, used to detect the pressure of the oil circuit in the hydraulic power pump;

[0032] An encoder 4 provided on the hydraulic power pump is used to detect the rotation angle of the safety net;

[0033] Preferably, the encoder 4 is a single-turn encoder;

[0034] A travel switch 7 disposed on the side base 3 is used to detect whether the safety net is in place when it is laid down or erected;

[0035] PLC module 8, the pressure switch 5, encoder 4, travel switch 7 and motor are connected;

[0036] An external control device 9 , which is connected to the PLC module 8 .

[0037] Here, the utility model uses a pressure switch on the electro-hydraulic power unit to detect the pressure of the oil circuit in the hydraulic power pump. When the hydraulic power exceeds the specified pressure, the PLC module can obtain signal feedback; in addition, the utility model uses an encoder on the transmission shaft connected to the electro-hydraulic power unit, and the transmission shaft is hard-connected to the hydraulic power pump, and the PLC module can obtain the rotation angle of the dynamic grid in real time; in addition, a travel switch is also used on the side base at the end of the transmission shaft; the PLC module can judge whether the safety net is stuck from multiple dimensions based on the status signal of the safety net that can be fed back by the pressure switch, the single-turn encoder and the travel switch; moreover, the utility model can remotely control the safety net through an external control device, realize the remote operation of the switching action of the safety net, and there is no need for on-site staff of the safety net to be on duty, thereby reducing the risk of on-site staff; and realize the external control device to monitor and control the safety net through Ethernet, etc.

[0038] like Figure 3 As shown, in an embodiment of the electro-hydraulic safety network of the present utility model, the external control device 9 is connected to the switch 11, and the switch 11 is connected to the PLC module 8 through a LAN interface.

[0039] Here, through an external control device connected to the switch, such as a mobile phone, computer or other device, the PLC module can provide a status signal of the safety network to the external control device and receive control instructions from it.

[0040] like Figure 3 As shown, in one embodiment of the electro-hydraulic safety network of the utility model, the external control device is connected to the PLC module via an RS485 interface.

[0041] Here, the external control device connected to the PLC module via the RS485 interface may be, for example, a tower signal acquisition device. The PLC module may provide the external control device with a safety network status signal and receive control instructions from it.

[0042] like Figure 2 As shown, in one embodiment of the electro-hydraulic safety net of the utility model, it also includes: a touch screen 10 connected to the PLC module 8, which can receive and display the status signal of the safety net provided by the PLC module.

[0043] Here, the touch screen can be connected to the PLC module via Ethernet.

[0044] like Figure 3 As shown, in one embodiment of the electro-hydraulic safety network of the utility model, the motor is connected to the PLC module via a relay group 12 .

[0045] In one embodiment of the electro-hydraulic safety net of the utility model, the relay group includes: a forward relay, a reverse relay and a locking relay.

[0046] Here, the forward rotation of the motor can be controlled by the forward relay, the reverse rotation of the motor can be controlled by the reverse relay, and the position of the safety net can be locked by the locking relay to increase safety.

[0047] Specifically, in terms of control ideas, the current status information of the safety net can be collected through encoders, pressure switches, and travel switches, and after comprehensive comparison by the PLC module, the status of the current equipment grid can be determined; based on the status of the current equipment grid, the specific alarm method can be as follows: Figure 4 As shown: The PLC module can determine whether the safety net is stuck from multiple dimensions based on the signal feedback from the pressure switch that exceeds the set pressure, the signal feedback from the encoder that exceeds the preset rotation angle range, and the signal feedback from the travel switch that is not switched in place.

[0048] In addition, external control signals can be collected through the Ethernet port and RS485 connection port, and the current status of the equipment grid can be sent; logical judgment and control command collection can be performed through the PLC, and sent to the touch screen; control commands can be sent to the PLC through the touch screen, and the current equipment information and equipment alarm can be obtained in a visual way; the control flow chart is as follows Figure 3 As shown:

[0049] like Figure 3 As shown, the utility model can be connected to a switch and then to the Ethernet interface J1~J4 to connect to a mobile phone or a computer. The external control device can send control commands through the Wifi of the connected network port or wireless router to achieve remote start and stop and status monitoring of the external control device.

[0050] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0051] Obviously, those skilled in the art can make various changes and modifications to the utility model without departing from the spirit and scope of the utility model. Thus, if these modifications and variations of the utility model fall within the scope of the claims of the utility model and their equivalents, the utility model is also intended to include these modifications and variations.

Claims

1. An electro-hydraulic safety net, characterized in that: include: Safety net; A middle base and a side base connected to the bottom of the safety net, wherein the middle base and the side base are arranged at intervals; A transmission shaft, the head end of which passes through and is fixed on the middle base; The end of the transmission shaft is passed through and fixed on the side base; An electro-hydraulic power unit is arranged on the middle base, and the electro-hydraulic power unit comprises: a motor and a hydraulic power pump connected to the motor, and the head end of the transmission shaft is connected to the hydraulic power pump; A pressure switch connected to the hydraulic power pump, used to detect the pressure of the oil circuit in the hydraulic power pump; An encoder provided on the hydraulic power pump, for detecting the rotation angle of the safety net; A travel switch arranged on the side base is used to detect whether the safety net is in place when it is laid down or erected; PLC module, the pressure switch, encoder, travel switch and motor are connected; An external control device is connected to the PLC module.

2. The electro-hydraulic safety net according to claim 1, characterized in that: The encoder is a single-turn encoder.

3. The electro-hydraulic safety net according to claim 1, characterized in that: The external control device is connected to a switch, and the switch is connected to the PLC module via a LAN interface.

4. The electro-hydraulic safety net according to claim 1, characterized in that: The external control device is connected to the PLC module via an RS485 interface.

5. The electro-hydraulic safety net according to claim 1, characterized in that: Also includes: A touch screen connected to the PLC module via Ethernet.

6. The electro-hydraulic safety net according to claim 1, characterized in that: The motor is connected to the PLC module via a relay group.

7. The electro-hydraulic safety net according to claim 6, characterized in that: The relay group includes: a forward relay, a reverse relay and a locking relay.

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