CN216278720U

CN216278720U - Automatic circulating hydraulic control system for sequential actions of scraper and sliding plate of compression type garbage truck

Info

Publication number: CN216278720U
Application number: CN202122376265.XU
Authority: CN
Inventors: 赵映龙; 颜仁喆; 王英豪; 宋迪; 王进钰
Original assignee: Gansu Construction Investment Heavy Technology Co ltd
Current assignee: Gansu Construction Investment Heavy Technology Co ltd
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2022-04-12
Anticipated expiration: 2031-09-29

Abstract

The utility model provides an automatic circulating hydraulic control system for sequential actions of a scraper plate and a sliding plate of a compression garbage truck, which comprises a power unit, a hydraulic pump, a special valve, an oil tank, two sliding plate oil cylinders and two scraper plate oil cylinders, wherein an oil suction port of the hydraulic pump is connected with the oil tank, an oil outlet of the hydraulic pump is connected with a port P of the special valve, a port T of the special valve is connected with the oil return tank, a port A and a port B of the special valve are connected with a hydraulic cylinder working loop, and the special valve is integrated by three electromagnetic reversing valves, two one-way sequence valves, a sequence valve, seven hydraulic control reversing valves and a hydraulic control one-way valve; the set pressure of the relief valve is greater than the pressure of the third sequence valve, the set pressure of the third sequence valve is greater than the set pressures of the first and second one-way sequence valves, and the set pressures of the first and second one-way sequence valves are equal. The utility model can realize uninterrupted continuous cycle control of the scraper and the sliding plate by inputting a single level signal, complete accurate monitoring of the action travel time of the compression type garbage truck hanging plate and the sliding plate, prevent misoperation, reduce potential safety hazard and reduce power loss, thereby improving efficiency.

Description

Automatic circulating hydraulic control system for sequential actions of scraper and sliding plate of compression type garbage truck

Technical Field

The utility model relates to the field of hydraulic technology and engineering machinery, in particular to a sequential action automatic circulation hydraulic control system for a scraper and a sliding plate of a compression garbage truck

Background

The compressed garbage post-loading formed by the scraper and the sliding plate is an important component of a compression type garbage truck, and the problems of the recovery capability and the compression efficiency of the compression truck to the garbage and the like are directly related. The control of the existing compression type garbage truck to the scraper sliding plate is to give a timing electric signal to the electromagnetic valve through a logic program or control the oil cylinder action according to a proximity switch position signal, thereby controlling the sequential action of the scraper sliding plate, completing the compression of garbage, often causing the proximity switch to shift or even damage when operating under a complex condition due to the large error of control time, leading to the loss of the scraper and the sliding plate position signal of a controller, and further failing to complete the accurate monitoring of the garbage compression action and causing the waste of overflow.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the technical scheme provided by the utility model is that the hydraulic control system comprises a power unit, a hydraulic pump (1), a special valve, an oil tank, two sliding plate oil cylinders (11) and two scraper blade oil cylinders (12), an oil suction port of the hydraulic pump (1) is connected with the oil tank, an oil outlet of the hydraulic pump is connected with a port P of the special valve, a port T of the special valve is connected with the oil tank, a port A1 and a port A2 are connected and then connected with a rodless cavity of the sliding plate oil cylinder (11), a port B1 and a port B2 are connected and then connected with a rod cavity of the sliding plate oil cylinder (11), a port A3 and a port A4 are connected and then connected with a rodless cavity of the scraper blade oil cylinder (12), a port B3 and a port B4 are connected and then connected with a rod cavity of the scraper blade oil cylinder (12), a port X of the special valve is connected with a pressure switch (3), a switching value electric signal of the pressure switch is transmitted to an electric loop (4), the oil tank, the hydraulic pump and the special valve are all connected through pipelines, the pressure switch (3), the electric loop (4) and the electromagnetic directional valve are connected through an electric wire harness.

The utility model provides an implementation mode which is composed of three electromagnetic directional valves, two one-way sequence valves, a sequence valve, seven hydraulic control directional valves and one hydraulic control one-way valve which are integrated on a special valve.

Compared with the prior art, the utility model has the beneficial effects that: the four continuous actions of backward rotation opening of the scraper, downward movement of the sliding plate and forward rotation closing of the scraper can be completed by inputting a single level signal or a manual signal, and the single-action control of the scraper sliding plate can be realized by a knob switch and a manual valve. The hydraulic control system is simple to operate, misoperation is prevented, potential safety hazards are reduced, working efficiency is improved, compared with most systems passing through the electric sensor and the PLC, programming and multiple proximity switches are not needed, the electric loop only needs to output a single level signal to realize the circulating action of the two groups of oil cylinders, and the hydraulic control system is controlled by the hydraulic control signal to be safer and more reliable.

Description of the drawings:

FIG. 1 is a sequential action automatic cycle hydraulic control system for a scraper and a sliding plate of a compression garbage truck according to an embodiment of the present invention;

reference numbers in the figures: 1-a hydraulic pump, 2-a safety valve, 3-a pressure switch, 4-an electric loop, 5-a third sequence valve, 6-a first hydraulic control reversing valve, 7-a first one-way sequence valve, 8-a second one-way sequence valve, 9-a second hydraulic control reversing valve, 10-a third hydraulic control reversing valve, 11-a sliding plate oil cylinder, 12-a scraper oil cylinder, 13-a fourth hydraulic control reversing valve, 14-a fifth hydraulic control reversing valve, 15-a sixth hydraulic control reversing valve, 16-a hydraulic control one-way valve, 17-a seventh hydraulic control reversing valve, 18-a third electromagnetic reversing valve, 19-a second electromagnetic reversing valve and 20-a first electromagnetic reversing valve.

The specific implementation mode is as follows:

according to the embodiment of the utility model, in combination with the figure 1, the automatic circulating hydraulic control system for the sequential action of the scraper and the sliding plate of the compression garbage truck comprises a power unit, a hydraulic pump, a special valve, an oil tank, two sliding plate oil cylinders and two scraper oil cylinders, wherein an oil suction port of the hydraulic pump is connected with the oil tank, an oil outlet of the hydraulic pump is connected with a port P of the special valve, a port T of the special valve is connected with the oil tank, a port A1 and a port A2 are connected and then connected with a rodless cavity of the sliding plate oil cylinder, a port B1 and a port B2 are connected and then connected with a rod cavity of the sliding plate oil cylinder, a port A3 and a port A4 are connected and then connected with a rodless cavity of the scraper oil cylinder, and a port B3 and a port B4 are connected and then connected with a rod cavity of the scraper oil cylinder; the X port of the special valve is connected with a pressure switch, switching value signals are directly transmitted to an electric loop, the oil tank, the pump and the special valve are all connected through pipelines, and the pressure switch, the electric loop and the electromagnetic directional valve are connected through an electric wire harness;

wherein three electromagnetic directional valves, two one-way sequence valves, a sequence valve, seven hydraulic control directional valves and a hydraulic control one-way valve are integrated on the special valve;

further, the relief valve set pressure P0> the third sequence valve set pressure P3> the first sequence valve set pressure P1 ═ the second sequence valve set pressure P2.

The working principle is as follows:

when the compression cycle work is started, the self-locking switch SB1 is only needed to be pressed down to electrify the electric third magnetic reversing valve (18), the third electromagnetic reversing valve (18) is switched to the left position, at the moment, the working oil enters the rod cavity of the scraper oil cylinder (12), the scraper oil cylinder (12) retracts, the scraper opens, after the scraper opening action is finished, the pressure of the working cavity begins to rise, when the pressure rises to the opening pressure of the first one-way sequence valve (7), the first one-way sequence valve (7) opens, the high-pressure oil enters the rodless cavity of the sliding plate oil cylinder (11), the sliding plate oil cylinder (11) extends out to drive the sliding plate and the scraper to move downwards together, after the action is finished, the working cavity continues to suppress pressure, the pressure rises to the opening pressure of the third sequence valve (5), the third sequence valve (5) opens, the hydraulic control one-way valve (16) is further opened, meanwhile, the sixth hydraulic control valve (15) is switched to the lower position, and the seventh hydraulic control reversing valve (17) is switched to the left position, at the moment, the sixth hydraulic control reversing valve (15) is reversed, high-pressure oil enters a rodless cavity of the scraper oil cylinder (12), at the moment, the pressure is reduced due to load action, the third sequence valve (5) is closed, at the moment, an oil circuit and a hydraulic control one-way valve (16) are connected behind the third sequence valve (5), the control oil circuits of the sixth hydraulic control reversing valve (15) and the seventh hydraulic control reversing valve (17) form a closed cavity, at the moment, the pressure of the closed cavity continuously enables the sixth hydraulic control reversing valve (15) and the seventh hydraulic control reversing valve (17) to be kept on a working position, meanwhile, as the control oil circuit of the first reversing valve (6) is communicated with the rodless cavity high-pressure oil circuit of the scraper oil cylinder (12), the first hydraulic control reversing valve (6) is switched to a right position, when the scraper oil cylinder (12) is completely extended out, the scraper is driven to rotate forwards to be closed, the pressure of the working cavity is suppressed, and the pressure is increased to the opening pressure of the second one-way sequence valve, high-pressure oil enters the rodless cavity of the oil cylinder of the sliding plate to drive the sliding plate and the scraping plate to move upwards together, so that one circulation of the scraping plate and the sliding plate for compressing garbage is completed, after the one circulation is finished, the pressure of the working cavity continues to rise until the relief valve overflows (2) is opened, at the moment, the electric loop (4) collects a high level signal input by the pressure switch (3), so that the relay KA2 is electrified and an electric signal of the third electromagnetic directional valve (18) is cut off, the valve core of the special valve returns under the action of the spring force, at the moment, the high level signal input by the pressure switch (3) to the electric loop (4) disappears, the relay KA2 is powered off, so that the third electromagnetic directional valve (18) continues to receive the electric signal, therefore, uninterrupted continuous cycle control over the scraper and the sliding plate is completed, accurate control over the action stroke of the scraper and the sliding plate is completed, power loss is reduced, and efficiency is improved.

In addition, the first electromagnetic directional valve (20) and the second electromagnetic directional valve (19) can realize single-action control over the scraper sliding plate, the single-action control is realized through two groups of three-gear knob switches in the electric loop (4), when one single-action control is operated at will, the relay KA3 is powered on to enable the third electromagnetic directional valve (18) to cut off an electric signal, and working oil paths for separating single action and circulating action in the working process are realized through the second hydraulic directional valve (9), the third hydraulic directional valve (10), the fourth hydraulic directional valve (13) and the fifth hydraulic directional valve (14) which are arranged in the loop.

Claims

1. The utility model provides a compression garbage truck scraper blade and slide automatic cycle hydraulic control system of action in proper order which characterized in that: it includes power unit, hydraulic pump (1), special valve, the oil tank, two slide hydro-cylinders (11) and two scraper blade hydro-cylinders (12), the oil absorption mouth and the oil tank of hydraulic pump (1) are connected, the oil-out of hydraulic pump is connected with the P mouth of special valve, the T mouth of special valve connects back oil tank, A1 and A2 mouth and inserts slide hydro-cylinder (11) rodless chamber again after connecting, B1 and B2 mouth insert slide hydro-cylinder (11) have the pole chamber again after connecting, insert scraper blade hydro-cylinder (12) rodless chamber again after A3 and A4 mouth are connected, insert scraper blade hydro-cylinder (12) have the pole chamber again after B3 and B4 mouth are connected, special valve X mouth connects pressure switch (3), pressure switch's level signal feeds back to electric circuit, oil tank, hydraulic pump, special valve between all through the tube coupling.

2. The hydraulic control system of claim 1, wherein: the special valve integrates the reversing valve on the valve block through plate type connection.

3. The hydraulic control system of claim 1, wherein: the special valve comprises: the safety valve (2) limits the highest pressure of the system, working oil ports (A4 and B4) of a first electromagnetic directional valve (20) are connected with working oil ports of a scraper oil cylinder (12), working oil ports (A1 and B4) of a second electromagnetic directional valve (19) are connected with working oil ports of a sliding plate oil cylinder (11), a third electromagnetic directional valve (18) connected with a main oil supply path, a first hydraulic control directional valve (6), a first one-way sequence valve (7), a second one-way sequence valve (8), a second hydraulic control directional valve (9), working oil ports (A2 and B2) connected with a third hydraulic control directional valve (10) are connected with working oil ports of the sliding plate oil cylinder (11), and a third electromagnetic directional valve (18), a third sequence valve (5), a hydraulic control one-way valve (16), a fourth hydraulic control directional valve (13), a fifth directional valve (14), a sixth hydraulic control directional valve (15), Working oil ports (A3 and B3) connected with the seventh hydraulic control reversing valve (17) are connected with the working oil port of the scraper oil cylinder (12).

4. The hydraulic control system according to claim 3, wherein the relief valve set pressure P0> the third sequence valve set pressure P3> the first sequence valve set pressure P1 ═ the second sequence valve set pressure P2.