CN217996728U

CN217996728U - Self-propelled aerial working platform changeable differential circuit system

Info

Publication number: CN217996728U
Application number: CN202221258135.4U
Authority: CN
Inventors: 金元华; 董佳星; 曹强
Original assignee: Jinda Heavy Industry Tianjin Co ltd
Current assignee: Jinda Heavy Industry Tianjin Co ltd
Priority date: 2022-05-24
Filing date: 2022-05-24
Publication date: 2022-12-09
Anticipated expiration: 2032-05-24

Abstract

The utility model relates to a self-propelled aerial working platform switchable differential loop system, which comprises a hydraulic cylinder, a double-acting balance valve, an oil way I, a reversing valve II, a pump station, an electromagnetic overflow valve and an oil way II, wherein the double-acting balance valve is arranged on an oil way pipe between a hydraulic cylinder rodless cavity and the oil way II, and between a hydraulic cylinder rod cavity and the oil way I; the reversing valve I is arranged on an oil path pipe between the oil path I and a port P of the pump station; the reversing valve II is arranged on an oil line pipe between the oil line II and a port P of the pump station, the electromagnetic overflow valve is arranged on the oil line pipe between the oil line II and a port T of the pump station, the reversing valve I, the reversing valve II and the electromagnetic overflow valve are all connected with a controller, the controller is connected with an operation interface, and a spring cavity on one side of the double-acting balance valve, which is provided with a rod cavity, is communicated with the atmosphere. The utility model discloses double-acting balance valve has the spring chamber intercommunication atmosphere of pole chamber one side, makes it under differential state, and double-acting balance valve still can open under less guide's pressure, has the effect of hoisting system energy-conservation nature.

Description

Self-propelled aerial working platform changeable differential circuit system

Technical Field

The utility model relates to a hydraulic equipment technical field especially relates to a changeable differential circuit system of self-propelled aerial working platform.

Background

Self-propelled aerial working platform needs its flexible arm system to have two kinds of running state, is state one respectively: high thrust and low speed, state two: low thrust and high speed. The first state belongs to an auxiliary state, when the telescopic boom system has a problem in operation, the hydraulic cylinder is expected to have a slower movement speed and a smaller action amplitude, so that the operation state of the telescopic boom system can be observed more conveniently, and the problem is found out; the second state belongs to a working state, and the main purpose is to improve the running speed of the mechanism, save the working time and improve the working efficiency.

The hydraulic cylinder differential circuit is a speed regulating circuit widely applied in a hydraulic transmission system. The single-piston-rod hydraulic cylinder differential circuit is essentially used for returning liquid discharged from a rod cavity of the hydraulic cylinder to a rodless cavity of the hydraulic cylinder, so that the flow rate of the liquid entering the rodless cavity is increased, and the extending speed of a piston rod is correspondingly increased.

Disclosure of Invention

The utility model aims at providing a changeable differential loop system of self-propelled aerial working platform, under differential state, two effect balance valves still can be opened under less guide's pressure, improve the energy-conservation nature of system.

The utility model discloses a realize above-mentioned purpose, adopt following technical scheme: a switchable differential loop system of a self-propelled aerial work platform comprises a hydraulic cylinder, a double-acting balance valve, an oil way I, a reversing valve II, a pump station, an operation interface, a controller, an electromagnetic overflow valve and an oil way II, wherein oil way pipes are connected between a rodless cavity of the hydraulic cylinder and the oil way II, between a rod cavity of the hydraulic cylinder and the oil way I, between the oil way I and a port P of the pump station, between the port P of the oil way II and the port P of the pump station and between the port T of the oil way II and the port T of the pump station; the reversing valve I is arranged on an oil path pipe between the oil path I and a port P of the pump station; the reversing valve II is arranged on an oil line pipe between the oil line II and a port P of the pump station, the electromagnetic overflow valve is arranged on the oil line pipe between the oil line II and the port T of the pump station, the reversing valve I, the reversing valve II and the electromagnetic overflow valve are all connected with a controller, the controller is connected with an operation interface, and a spring cavity on one side of a rod cavity of the double-acting balance valve is communicated with the atmosphere.

The controller is a single chip microcomputer controller or a PLC controller.

The operation interface is one of a desktop computer operation interface, a notebook computer operation interface and a flat panel operation interface.

The output end of the operation interface is connected with the input end of the controller.

The first reversing valve, the second reversing valve and the electromagnetic overflow valve are all connected with the output end of the controller.

The beneficial effects of the utility model are that: the utility model discloses double-acting balance valve has the spring chamber intercommunication atmosphere of pole chamber one side, makes it under differential state, and double-acting balance valve still can open under less guide's pressure, has the effect of hoisting system energy-conservation nature. Furthermore, the utility model discloses can select different motion state according to the work demand of difference to set for different overflow pressure values according to the motion state of difference.

Drawings

Fig. 1 is a schematic structural view of the present invention;

in the figure: 1-a hydraulic cylinder; 2-double acting balancing valve; 3-oil path one; 4, a first reversing valve; 5-a second reversing valve; 6-a pump station; 7-operating an interface; 8-a controller; 9-an electromagnetic overflow valve; 10-oil path two;

the following detailed description will be made in conjunction with embodiments of the present invention with reference to the accompanying drawings.

Detailed Description

The invention will be further explained with reference to the following figures and examples:

as shown in fig. 1, a switchable differential loop system of a self-propelled aerial work platform comprises a hydraulic cylinder 1, a double-acting balance valve 2, a first oil way 3, a first reversing valve 4, a second reversing valve 5, a pump station 6, an operation interface 7, a controller 8, an electromagnetic overflow valve 9 and a second oil way 10, wherein oil way pipes are connected between a rodless cavity of the hydraulic cylinder 1 and the second oil way 10, between a rod cavity of the hydraulic cylinder 1 and the first oil way 3, between the first oil way 3 and a P port of the pump station 6, between the second oil way 10 and a P port of the pump station 6, and between the second oil way 10 and a T port of the pump station 6, the double-acting balance valve 2 is arranged on the oil way pipes between the rodless cavity of the hydraulic cylinder 1 and the second oil way 10, and between the rod cavity of the hydraulic cylinder 1 and the first oil way 3; the reversing valve I4 is arranged on an oil path pipe between the oil path I3 and a port 6P of the pump station; the second reversing valve 5 is arranged on an oil line pipe between the second oil line 10 and a port P of the pump station 6, the electromagnetic overflow valve 9 is arranged on the oil line pipe between the second oil line 10 and a port T of the pump station 6, the first reversing valve 4, the second reversing valve 5 and the electromagnetic overflow valve 9 are all connected with the controller 8, the controller 8 is connected with the operation interface 7, and the spring cavity on one side of the rod cavity of the double-acting balance valve 2 is communicated with the atmosphere.

The controller 8 is a single chip controller or a PLC controller.

The operation interface 7 is one of a desktop computer operation interface, a notebook computer operation interface and a flat panel operation interface, the operation interface 7 is a man-machine interaction interface which is frequently used in a hydraulic equipment switchable differential circuit system, and the interface has three states, namely a differential state, a normal motion state and a retraction motion state.

The output end of the operation interface 7 is connected with the input end of the controller 8.

The first reversing valve 4, the second reversing valve 5 and the electromagnetic overflow valve 9 are all connected with the output end of the controller 8.

The utility model discloses the working process is as follows:

if the differential state is selected on the operation interface 7, the signal is fed back to the controller 8, the first reversing valve 4 is controlled to be electrified, the second reversing valve 5 is controlled to be electrified, and at the moment, oil in the rod cavity of the hydraulic cylinder 1 flows through the double-acting balance valve 2, the first oil way 3, the first reversing valve 4, the second reversing valve 5 and the second oil way 10 to enter the rodless cavity of the hydraulic cylinder 1; thereby realizing the motion process of low thrust and high speed;

if a normal motion state is selected on the operation interface 7, the signal is fed back to the controller 8, the first reversing valve 4 is controlled to be powered off, the second reversing valve 5 is powered on, and at the moment, oil in a rod cavity of the hydraulic cylinder 1 flows through the double-acting balance valve 2, the first oil way 3 and the first reversing valve 4 and returns to a port 6T of the pump station, so that a motion process with high thrust and low speed is realized;

if the retraction motion state is selected on the operation interface 7, the signal is fed back to the controller 8, the first reversing valve 4 is controlled to be powered on, the second reversing valve 5 is controlled to be powered off, and at the moment, oil liquid in the rodless cavity of the hydraulic cylinder 1 flows through the double-acting balance valve 2, the second oil way 10 and the second reversing valve 5 and returns to a port 6T of the pump station.

In addition, the electromagnetic overflow valve 9 can set different pressure values according to different motion states, and the system is protected more efficiently.

The spring cavity at one side of the rod cavity of the double-acting balance valve 2 is communicated with the atmosphere, so that the double-acting balance valve can still be opened with smaller pilot pressure in a differential state, and the energy conservation of the system is improved. Furthermore, the utility model discloses can select different motion state according to the work demand of difference to set for different overflow pressure values according to the motion state of difference.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above embodiments, and various improvements made by the method concept and technical solution of the present invention or directly applied to other occasions without improvement are all within the protection scope of the present invention.

Claims

1. A switchable differential loop system of a self-propelled aerial work platform is characterized by comprising a hydraulic cylinder (1), a double-acting balance valve (2), a first oil way (3), a first reversing valve (4), a second reversing valve (5), a pump station (6), an operation interface (7), a controller (8), an electromagnetic overflow valve (9) and a second oil way (10), wherein oil path pipes are respectively connected between a rodless cavity of the hydraulic cylinder (1) and the second oil way (10), between a rod cavity of the hydraulic cylinder (1) and the first oil way (3), between the first oil way (3) and a P port of the pump station (6), between the second oil way (10) and a P port of the pump station (6) and between the second oil way (10) and a T port of the pump station (6), and the double-acting balance valve (2) is arranged on the oil path pipes between the rodless cavity of the hydraulic cylinder (1) and the second oil way (10) and between the rod cavity of the first oil way (3); the reversing valve I (4) is arranged on an oil path pipe between the oil path I (3) and a P port of the pump station (6); the reversing valve II (5) is arranged on an oil path pipe between the oil path II (10) and a P port of the pump station (6), the electromagnetic overflow valve (9) is arranged on the oil path pipe between the oil path II (10) and a T port of the pump station (6), the reversing valve I (4), the reversing valve II (5) and the electromagnetic overflow valve (9) are all connected with the controller (8), the controller (8) is connected with the operation interface (7), and the spring cavity on one side of the rod cavity of the double-acting balance valve (2) is communicated with the atmosphere.

2. A self-propelled aerial work platform switchable differential loop system according to claim 1 wherein the controller (8) is a single chip controller or a PLC controller.

3. The self-propelled aerial work platform switchable differential loop system of claim 1, wherein the operator interface (7) is one of a desktop computer operator interface, a laptop computer operator interface, and a tablet operator interface.

4. A self-propelled aerial work platform switchable differential circuit system according to claim 3 wherein the output of the operator interface (7) is connected to the input of the controller (8).

5. The switchable differential circuit system of a self-propelled aerial work platform according to claim 4, wherein the first reversing valve (4), the second reversing valve (5) and the electromagnetic spill valve (9) are connected to an output of the controller (8).