Electronic control standby united excavator main valve
Through the electrically controlled backup joint excavator main valve, the monitor sets the current value to control the opening area and port relief valve pressure of the excavator main control valve, which solves the problem that the excavator cannot quickly adjust the pressure of the main relief valve in the prior art, and achieves rapid adjustment of the equipment flow and pressure, and improves working efficiency.
Patent Information
- Application Number
- CN202422287910.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-09-19
AI Technical Summary
When existing excavators replace different equipment, they cannot quickly adjust the main relief valve pressure to meet the needs of different equipment, resulting in cumbersome and time-consuming operation and affecting work efficiency.
The main valve of the electric-controlled backup excavator is adopted to control the opening area and the port relief valve pressure of the main valve of the excavator, which is used to set the current value through the monitor to achieve rapid adjustment of flow rate and pressure.
It is achieved to facilitate the regulation of the relief valve pressure, simplify the operation process, and improve work efficiency.
Smart Images
Figure CN223048126U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of excavator accessories, in particular to an electric control standby connection main valve for an excavator. Background Art
[0002] An excavator, also known as an excavation machine, often works in cooperation with attachments. When an excavator is equipped with multiple attachments, such as a hydraulic shear, a breaker, a grapple, a lawn mower and other attachments, it is necessary to mechanically adjust the pressure of the main relief valve back and forth, and the flow rate required by different attachments cannot be adjusted. Mechanically adjusting the pressure of the main relief valve is cumbersome and time-consuming, affecting efficiency.
[0003] Therefore, designing a method for facilitating the adjustment of the relief valve pressure and simplifying the adjustment operation to improve work efficiency is exactly the problem to be solved by the inventor. Summary of the Utility Model
[0004] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide an installation structure for an electric excavator charging seat, which can realize the functions of facilitating the adjustment of the relief valve pressure, simplifying the adjustment operation and improving work efficiency.
[0005] The technical solution adopted by the device of the utility model is: an electric control standby connection main valve for an excavator, including a main control valve, the main control valve is connected with a standby connection of the main control valve of the excavator, a first port electric control relief valve is connected to the interface of the standby connection of the main control valve of the excavator, a second electric control relief valve is connected to the interface of the standby connection of the main control valve of the excavator, a first pilot electric control proportional valve is connected to the left end port of the standby connection of the main control valve of the excavator, a second pilot electric control proportional valve is connected to the right end port of the standby connection of the main control valve of the excavator, the first port electric control relief valve, the second port electric control relief valve, the first pilot electric control proportional valve and the second pilot electric control proportional valve are all electrically connected to a controller through wires, and the controller is electrically connected with a monitor.
[0006] Further, the standby connection of the main control valve of the excavator is connected to the A, B, T, P interfaces of the main control valve through the internal channel of the main control valve.
[0007] Further, the first port electric control relief valve is connected to the A, T interfaces of the main control valve respectively through the internal channel of the main control valve.
[0008] Further, the second port electric control relief valve is connected to the B, T ports of the main control valve respectively through the internal channel of the main control valve.
[0009] Further, the first pilot electric control proportional valve is connected to the DR, Pi interfaces of the main control valve through the internal channel of the main control valve.
[0010] Further, the second pilot electric control proportional valve is connected to the DR, Pi interfaces of the main control valve through the internal channel of the main control valve.
[0011] The beneficial effects of the device of the present utility model are as follows:
[0012] 1. By setting the current value through the excavator monitor, the present utility model controls the opening area of the standby connection of the excavator main control valve and the pressure of the port overflow valve, quickly adjusts the flow rate and pressure of the attachment, and realizes the function of facilitating the adjustment of the overflow valve pressure, simplifying the adjustment operation and improving the work efficiency. Description of the Drawings
[0013] Figure 1 It is a schematic structural diagram of the present utility model.
[0014] Description of the reference numerals in the drawings: 1 - standby connection of the excavator main control valve; 2 - second pilot electro-hydraulic proportional valve; 3 - first pilot electro-hydraulic proportional valve; 4 - second port electro-hydraulic overflow valve; 5 - first port electro-hydraulic overflow valve. Detailed Embodiments
[0015] The following further elaborates the device of the present utility model in conjunction with specific embodiments. These embodiments are only used to illustrate the present utility model and not to limit the scope of the present utility model. In addition, it should be understood that after reading the content taught by the device of the present utility model, those skilled in the art can make various changes or modifications to the present utility model, and these equivalent forms also fall within the scope defined by the appended claims of the application.
[0016] Embodiment 1: Refer to Figure 1 It is a schematic structural diagram of the present utility model. An electro-hydraulic standby connection excavator main valve includes a main control valve. The main control valve is connected to the standby connection 1 of the excavator main control valve. The interface of the standby connection 1 of the excavator main control valve is connected to the first port electro-hydraulic overflow valve 5 through a pipeline. The interface of the standby connection 1 of the excavator main control valve is connected to a second electro-hydraulic overflow valve through a pipeline. The left end port of the standby connection 1 of the excavator main control valve is connected to the first pilot electro-hydraulic proportional valve 3. The right end port of the standby connection 1 of the excavator main control valve is connected to the second pilot electro-hydraulic proportional valve 2. The first port electro-hydraulic overflow valve 5, the second port electro-hydraulic overflow valve 4, the first pilot electro-hydraulic proportional valve 3, and the second pilot electro-hydraulic proportional valve 2 are all electrically connected to the controller through wires, and the controller is electrically connected to a monitor.
[0017] The standby connection 1 of the excavator main control valve is connected to the A, B, T, and P interfaces of the main control valve through the internal channel of the main control valve. The first port electro-hydraulic overflow valve 5 is respectively connected to the A and T interfaces of the main control valve through the internal channel of the main control valve. The second port electro-hydraulic overflow valve 4 is respectively connected to the B and T ports of the main control valve through the internal channel of the main control valve. The first pilot electro-hydraulic proportional valve 3 is connected to the DR and Pi interfaces of the main control valve through the internal channel of the main control valve. The second pilot electro-hydraulic proportional valve 2 is connected to the DR and Pi interfaces of the main control valve through the internal channel of the main control valve.
[0018] For the standby connection 1 of the main control valve of the excavator to achieve electro-hydraulic control, the standby connection is first designed with a pilot electro-hydraulic proportional valve to control the flow rate and a port electro-hydraulic relief valve to control the pressure. In this way, by using the monitor to limit the current values received by the electro-hydraulic proportional valve and the current of the port electro-hydraulic relief valve, the output flow rate and pressure are adjusted respectively to achieve rapid adjustment of the flow rate and pressure.
[0019] According to the specific flow rate required by the attachment, different current values La are set through the monitor to adjust the current input values of the first pilot electro-hydraulic proportional valve 3 and the second pilot electro-hydraulic proportional valve 2. The first pilot electro-hydraulic proportional valve 3 is S3, and the second pilot electro-hydraulic proportional valve 2 is S4. Thus, the control pressure Pi input to both ends of the spool of the standby connection 1 of the main control valve of the excavator is adjusted. Different current values result in different secondary pressures of Pi input to the spool of the standby connection 1 of the main control valve of the excavator. Different secondary pressures lead to different spool displacement amounts of the standby connection 1 of the main control valve of the excavator. Different through-flow areas from P to A and B result in different flow rates. By adjusting the current values of S3 and S4, the flow rate required by the attachment can be precisely controlled, and the flow rate adjustment from P to A and B can be achieved to meet the control of different flow rates by the attachment. According to the specific pressure required by the attachment, a certain current value PA is set through the monitor. The current value PA acts on the electromagnetic coils of the first port electro-hydraulic relief valve 5S1 and the second port electro-hydraulic relief valve 4S2. The electromagnetic coils generate corresponding electromagnetic forces to control the pressure X MPa required for the opening of the first port electro-hydraulic relief valve 5 and the second port electro-hydraulic relief valve 4. The first port electro-hydraulic relief valve 5 is S1, and the second port electro-hydraulic relief valve 4 is S2. When the pressures of the A and B oil circuits reach X MPa, the port electro-hydraulic relief valve starts to work for overflow, achieving the control of the pressures of the A and B oil circuits. By setting different current values through the excavator monitor, different overflow pressures of the A and B oil circuits can be achieved.
[0020] The utility model controls the opening area of the standby connection 1 of the main control valve of the excavator and the pressure of the port relief valve by setting current values through the excavator monitor, quickly adjusts the flow rate and pressure of the attachment, and realizes the functions of facilitating the adjustment of the relief valve pressure, simplifying the adjustment operation, and improving the working efficiency.
Claims
1. An electronically controlled backup link excavator main valve, comprising a main control valve, wherein the main control valve is connected to an excavator main control valve backup link (1), characterized in that: A first-port electrically controlled overflow valve (5) is connected to the interface of the excavator main control valve backup link (1), a second electrically controlled overflow valve is connected to the interface of the excavator main control valve backup link (1), a first pilot electrically controlled proportional valve (3) is connected to the left end port of the excavator main control valve backup link (1), a second pilot electrically controlled proportional valve (2) is connected to the right end port of the excavator main control valve backup link (1), the first-port electrically controlled overflow valve (5), the second-port electrically controlled overflow valve (4), the first pilot electrically controlled proportional valve (3), and the second pilot electrically controlled proportional valve (2) are all electrically connected to a controller via wires, and the controller is electrically connected to a monitor.
2. The electronically controlled standby excavator main valve according to claim 1, characterized in that: The excavator main control valve backup link (1) is connected to the A, B, T, and P interfaces of the main control valve through the internal channel of the main control valve.
3. The electronically controlled standby excavator main valve according to claim 1 is characterized in that: The first-port electrically controlled relief valve (5) is respectively connected to the A and T interfaces of the main control valve through the internal channel of the main control valve.
4. The electronically controlled standby excavator main valve according to claim 1, characterized in that: The second-port electrically controlled relief valve (4) is respectively connected to the B port and the T port of the main control valve through an internal channel of the main control valve.
5. The electronically controlled standby excavator main valve according to claim 1 is characterized in that: The first pilot electronically controlled proportional valve (3) is connected to the DR and Pi interfaces of the main control valve via an internal channel of the main control valve.
6. The electronically controlled standby excavator main valve according to claim 1, characterized in that: The second pilot electronically controlled proportional valve (2) is connected to the DR and Pi interfaces of the main control valve via an internal channel of the main control valve.