Quick-change pipeline operating system for excavator and excavator

Abstract

The utility model provides a quick-change pipeline operating system for an excavator and the excavator, and belongs to the technical field of engineering machinery. The hydraulic system comprises a main valve, a pilot oil source valve, a quick-change electromagnetic valve, a main valve oil way, a pilot oil way and a quick-change oil way, the main valve is provided with a Pp high-pressure oil port; the main valve oil way comprises a first main valve oil way and a second main valve oil way; one end of the pilot oil source valve is connected with the Pp high-pressure oil port through the first main valve oil way, and the other end of the pilot oil source valve is connected with an execution element through the pilot oil way. One end of the quick-change electromagnetic valve is connected with the Pp high-pressure oil port through the second main valve oil way, and the other end of the quick-change electromagnetic valve is connected with a quick-change device through the quick-change oil way. The pilot oil way and the quick-change oil way are separated, the quick-change electromagnetic valve is arranged on the quick-change oil way, and the effect of meeting various quick-change pressure requirements is achieved by adjusting the pressure reducing valve of the quick-change electromagnetic valve.

Description

TECHNICAL FIELD

[0001] The utility model belongs to engineering machinery technical field, especially relates to a quick change pipeline operation system for excavator and excavator. BACKGROUND

[0002] The statements in this section merely provide background information related to the utility model and do not necessarily constitute prior art.

[0003] As Figure 6 The existing quick change pipeline of micro-digging supplies high pressure oil from the main valve Pp high pressure oil port, reduces pressure to low pressure oil 3.5MPa through the main valve oil circuit via the pilot oil source valve pressure reducing valve, and then connects the three-way from the pilot oil source valve PR port, one way through the pilot oil circuit as the pilot first pressure oil flows to the pilot handle and foot pedal etc., and the other way flows to the quick change electromagnetic valve through the quick change oil circuit to the quick change device. This quick change control system is simple and safe, only when the safety lever is put down, the pilot oil source valve PR port electromagnetic valve is electrified, the pilot oil pipe and the quick change oil pipe can be oiled, and the misoperation can be prevented, but the quick change pressure and the low pressure pilot pressure are bound, the oil circuit of quick change uses the pilot oil, only when the safety lever is put down, the pilot oil is oiled, and the handle can be operated, safety is ensured, and the scheme cannot meet the quick change device of high pressure demand. CONTENT OF UTILITY MODEL

[0004] The utility model aims at providing a quick change pipeline operation system for excavator and excavator, to solve the problem of the quick change device of high pressure demand in prior art.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] The utility model provides a quick change pipeline operation system for excavator, including main valve, pilot oil source valve, quick change electromagnetic valve, main valve oil circuit, pilot oil circuit and quick change oil circuit.

[0007] The main valve has Pp high pressure oil port;

[0008] The main valve oil circuit includes first main valve oil circuit and second main valve oil circuit;

[0009] The pilot oil source valve one end is connected Pp high pressure oil port through first main valve oil circuit, and the other end is connected execution element through pilot oil circuit;

[0010] The quick change electromagnetic valve one end is connected Pp high pressure oil port through second main valve oil circuit, and the other end is connected quick change device through quick change oil circuit.

[0011] Further, Pp high pressure oil port is one oil port on the main valve.

[0012] Further, the pilot oil source valve is installed at the left front end of the excavator platform.

[0013] Further, the quick-change electromagnetic valve is installed at the right rear end of the excavator platform.

[0014] Further, the pilot oil source valve comprises a P oil port, a PR oil port and a pressure reducing valve.

[0015] Further, the oil flowing out of the Pp high-pressure oil port flows into the P oil port of the pilot oil source valve through the first main valve oil path;

[0016] Further, the oil is reduced to a set value by the pressure reducing valve and then flows out of the two-position three-way electromagnetic valve of the PR oil port as pilot primary pressure oil and flows to the oil inlet of the actuator through the pilot oil path.

[0017] Further, the pilot oil source valve further comprises an overflow valve, a check valve and an accumulator;

[0018] The overflow valve is used for protecting the system pressure when the pressure reducing valve fails;

[0019] The check valve is used for preventing the reverse flow of the oil;

[0020] The accumulator is used for providing a backup pressure source.

[0021] Further, the quick-change electromagnetic valve comprises a P oil port, a pressure reducing valve, a two-position four-way quick-change electromagnetic valve, an A oil port and a B oil port.

[0022] Further, the oil flowing out of the Pp high-pressure oil port flows into the P oil port of the quick-change electromagnetic valve through the second main valve oil path;

[0023] After the oil is reduced to a set value by the pressure reducing valve, the oil flows to the quick-change device through the A or B oil port of the two-position four-way quick-change electromagnetic valve through the quick-change pipeline.

[0024] The technical scheme of the utility model has the following beneficial effects:

[0025] The utility model separates the pilot oil path and the quick-change oil path, sets the quick-change electromagnetic valve on the quick-change oil path, adjusts the pressure reducing valve of the quick-change electromagnetic valve, and realizes the effect of meeting the quick-change pressure requirements.

[0026] The advantages of the additional aspects of the utility model will be partially given in the following description, some will become obvious from the following description, or will be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0027] The drawings constituting a part of the present application are used to provide further understanding of the present application, and the schematic embodiments of the present application and the explanations thereof are used to explain the present application, and do not constitute improper limitation on the present application.

[0028] Figure 1 It is a schematic diagram of the mechanical connection structure of the present application.

[0029] Figure 2 It is a schematic diagram of the quick-change electromagnetic valve structure of the present application.

[0030] Figure 3 It is a schematic diagram of the pilot oil source valve structure of the present application.

[0031] Figure 4 It is a schematic diagram of the main valve structure of the present application.

[0032] Figure 5 It is a connection schematic diagram of the quick-change pipeline operation system of the present application.

[0033] Figure 6 It is a connection schematic diagram of the quick-change pipeline operation system in the prior art

[0034] Among them, 1, main valve; 2, pilot oil source valve; 3, quick-change electromagnetic valve; 4, first main valve oil way; 5, second main valve oil way; 6, pilot oil way; 7, quick-change oil way. DETAILED DESCRIPTION

[0035] It should be pointed out that the following detailed description is all exemplary, and aims to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used in this paper have the same meaning as that generally understood by the ordinary skilled in the art to which the present application belongs.

[0036] It should be noted that the terms used herein are only for the purpose of describing the specific embodiments, and are not intended to limit the exemplary embodiments according to the present application.

[0037] In the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0038] The present application discloses a kind of quick-change pipeline operation system for excavator, as shown in Figure 1 And Figure 5 It includes: main valve 1, pilot oil source valve 2, quick-change electromagnetic valve 3, main valve oil way, pilot oil way 6 and quick-change oil way 7;Main valve oil way includes first main valve oil way 4 and second main valve oil way 5;Main valve 1 has Pp high pressure oil port, Pp high pressure oil port is one oil port on main valve 1, Pp high pressure oil port is connected with pilot oil source valve 2 by three-way joint one end through first main valve oil way 4, and the other end is connected with quick-change electromagnetic valve 3 by second main valve oil way 5.

[0039] In a specific embodiment, the pilot oil source valve 2 is installed at the left front end of the excavator platform and is arranged on the pilot oil line 6. One end of the pilot oil source valve 2 is connected to the Pp high-pressure oil port of the main valve 1 through the first main valve oil line 4, and the other end is connected to the oil inlet of the handle pedal and other actuating elements through the PR port of the pilot oil source valve 2 and the pilot oil line 6.

[0040] The pilot oil source valve 2 includes a P oil port, a PR oil port, and a pressure reducing valve. The oil flowing out of the Pp high-pressure oil port flows into the P oil port of the pilot oil source valve 2 through the first main valve oil line 4, is reduced in pressure by the pressure reducing valve of the pilot oil source valve 2, and then flows out of the two-position three-way electromagnetic valve of the PR oil port as pilot primary pressure oil to the oil inlet of the handle pedal and other actuating elements after being reduced to 3.5 MPa low-pressure oil.

[0041] The pressure reducing valve of the pilot oil source valve 2 is used to reduce the oil pressure to the pilot primary pressure oil set value of the handle pedal and other actuating elements.

[0042] In a specific embodiment, the quick-change electromagnetic valve 3 is installed at the right rear end of the excavator platform and is arranged on the quick-change oil line 7. One end of the quick-change electromagnetic valve 3 is connected to the Pp high-pressure oil port through the second main valve oil line 5, and the other end is connected to the quick-change device through the quick-change oil line 7.

[0043] The quick-change electromagnetic valve 3 includes a P oil port, a pressure reducing valve, a two-position four-way quick-change electromagnetic valve, an A oil port, and a B oil port. The oil flowing out of the Pp high-pressure oil port flows into the P oil port of the quick-change electromagnetic valve 3 through the second main valve oil line 5, is reduced in pressure by the pressure reducing valve of the quick-change electromagnetic valve 3, and then flows to the quick-change device through the A or B oil port through the two-position four-way quick-change electromagnetic valve through the quick-change line after being reduced to 11 MPa low-pressure oil.

[0044] The pressure reducing valve of the quick-change electromagnetic valve 3 is used to reduce the oil pressure to the quick-change device opening pressure oil set value. Specifically, the pressure of the oil can be adjusted to any required pressure in the range of 0.5-31.5 MPa by adjusting the pressure reducing valve screw on the quick-change electromagnetic valve 3.

[0045] In a specific embodiment, the structure of the pilot oil source valve 2 is as shown in Figure 3 wherein P is the oil inlet, T is the oil return port, BV, PR, and PV are actuating oil ports, and from left to right are a pressure reducing valve, a relief valve, a check valve, a two-position three-way electromagnetic valve, and an accumulator.

[0046] The pressure reducing valve is used to adjust the pressure of the pressure oil, the relief valve is used to protect the system pressure when the pressure reducing valve fails, the check valve is used to prevent reverse flow of the oil, and the accumulator is used to provide a backup pressure source.

[0047] Two-position three-way solenoid valve can control the on-off or switching direction of oil in the system. The valve has two working states (on or off) and three channels (one inlet and two outlets), and the oil flow is controlled by changing the position of the valve core, which is used to control the on-off of oil in BV and PR, and realizes the connection of the pilot control circuit with PR.

[0048] The structure of the quick-change solenoid valve 3 is shown in Figure 2 , wherein P is the oil inlet, T is the oil return port, A and B are the actuating oil ports, and the pressure reducing valve, two-position four-way solenoid valve and check valve are sequentially arranged from bottom to top.

[0049] The structure of the main valve 1 is shown in Figure 4 , wherein P1 is the oil inlet, Pp is the oil distribution port, T1, T2 and TS are the oil return ports, LS2 is the load-sensitive feedback oil port, and the reversing valve and compensation valve of the bulldozer blade, left travel, right travel, rotation, boom swing, standby 1, standby 2, boom, stick and bucket are sequentially arranged from left to right.

[0050] The quick-change device includes a quick connector and a quick-change joint, through which various attachments can be quickly installed and switched on the excavator, thereby expanding the use range of the excavator, saving time and improving work efficiency. The quick-change device can greatly reduce the time for replacing the attachments of the excavator, effectively improve the work efficiency of replacing the attachments by quickly assembling and disassembling the attachments. At the same time, the attachments are more labor-saving during installation, convenient and safe.

[0051] In this embodiment, the on-off of the pilot oil can be realized by energizing the pilot oil source valve 2. Specifically, when the safety lever is lowered to close the pilot travel switch, the electrical signal of the pilot switch is transmitted to the instrument, and the instrument transmits the differential signal to the controller through the CAN line. At this time, under the condition that the controller receives the pilot switch signal, the enable key of the left handle and the operation key of the right handle are pressed at the same time, and the electrical signals of the left and right handle keys are input to the controller. The controller outputs a signal to the quick-change solenoid valve 3 to control the extension and retraction of the quick-change device oil cylinder. This design can avoid the misoperation of the handle after the separation of the pilot oil circuit 6 and the quick-change oil circuit 7, because the quick-change oil circuit 7 is not controlled by the pilot oil.

[0052] The working principle of the utility model is as follows:

[0053] High-pressure oil is supplied from the Pp high-pressure oil port of the main valve to two paths through a three-way shunt, one path is reduced in pressure by the pilot oil source valve and reduced to 3.5MPa low-pressure oil, and then flows out from the PR oil port two-position three-way solenoid valve as the pilot primary pressure oil to the pilot handle and foot pedal.

[0054] Another road to the quick change electromagnetic valve, through the quick change electromagnetic valve pressure reducing valve to low pressure oil 11MPa after from two four-way quick change electromagnetic valve to quick change device oil supply. And quick change electromagnetic valve pressure reducing valve can be manually adjusted pressure in the range of 0.5~31.5MPa, meet a variety of quick change pressure demand. This design will separate the pilot oil circuit and quick change oil circuit, through the quick change electromagnetic valve pressure reducing valve by adjusting the pressure through the quick change electromagnetic valve body on the pressure reducing valve bolt adjustment in any range, realize a variety of quick change pressure.

[0055] The above describes the specific embodiments of the present application in conjunction with the drawings, but is not a limitation on the scope of protection of the present application, and those skilled in the art should understand that on the basis of the technical scheme of the present application, various modifications or deformations made by those skilled in the art without creative labor are still within the scope of protection of the present application.

Claims

1. A quick coupler line operating system for an excavator, characterized by, The main valve, the pilot oil source valve, the quick-change electromagnetic valve, the main valve oil path, the pilot oil path and the quick-change oil path are included. The main valve has a Pp high-pressure oil port. The main valve oil path includes a first main valve oil path and a second main valve oil path. One end of the pilot oil source valve is connected to the Pp high-pressure oil port through the first main valve oil path, and the other end is connected to the actuator through the pilot oil path. One end of the quick-change electromagnetic valve is connected to the Pp high-pressure oil port through the second main valve oil path, and the other end is connected to the quick-change device through the quick-change oil path.

2. A quick coupler line operating system for an excavator according to claim 1, characterized in that, The Pp high-pressure oil port is a separate oil port on the main valve.

3. A quick coupler line operating system for an excavator according to claim 1, wherein The pilot oil source valve is installed at the left front end of the excavator platform.

4. A quick coupler hydraulic operating system for an excavator as set forth in claim 1, characterized in that, The quick-change electromagnetic valve is installed at the right rear end of the excavator platform.

5. A quick coupler hydraulic operating system for an excavator as set forth in claim 1, characterized in that, The pilot oil source valve includes a P oil port, a PR oil port and a pressure reducing valve.

6. A quick coupler hydraulic operating system for an excavator as claimed in claim 5, characterised in that, The oil flowing out of the Pp high-pressure oil port flows into the P oil port of the pilot oil source valve through the first main valve oil path. The oil is reduced to a set value by the pressure reducing valve, and then flows out of the two-position three-way electromagnetic valve of the PR oil port as pilot primary pressure oil through the pilot oil path to the oil inlet of the actuator.

7. A quick coupler hydraulic operating system for an excavator as defined in claim 5 wherein, The pilot oil source valve further includes an overflow valve, a check valve and an accumulator. The overflow valve is used to protect the system pressure when the pressure reducing valve fails. The check valve is used to prevent reverse flow of oil. The accumulator is used to provide a backup pressure source.

8. A quick coupler hydraulic operating system for an excavator as set forth in claim 1, characterized in that, The quick-change electromagnetic valve includes a P oil port, a pressure reducing valve, a two-position four-way quick-change electromagnetic valve, an A oil port and a B oil port.

9. A quick coupler hydraulic operating system for an excavator as claimed in claim 8, wherein, The oil flowing out of the Pp high-pressure oil port flows into the P oil port of the quick-change electromagnetic valve through the second main valve oil path. The oil is reduced to a set value by the pressure reducing valve, and then flows to the quick-change device through the A or B oil port through the two-position four-way quick-change electromagnetic valve through the quick-change pipeline.

10. An excavator characterized by comprising: The quick-change pipeline operating system for excavators is applied.

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