Oil way switching device and hydraulic system
By integrating a dual-balance valve and a reversing valve into the oil circuit switching device, the problem of complex control of actuators in mechanical construction equipment is solved, achieving the effects of simplifying pipelines and reducing costs.
Patent Information
- Application Number
- CN202422860986.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2034-11-21
AI Technical Summary
In existing mechanical construction equipment, the control methods of the actuators are complex, resulting in complicated pipeline connections, high costs, and large space occupation, which is especially evident in actuators that are not frequently used.
An integrated oil circuit switching device with dual balance valves and directional valves is adopted. A single directional valve controls two actuators, simplifying the oil circuit structure, reducing pipeline connections, and lowering costs and space requirements.
It achieves effective control of dual actuators, simplifies pipeline structure, reduces costs and installation space requirements, and reduces the risk of oil leakage.
Smart Images
Figure CN223708118U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hydraulic technology, and in particular to an oil circuit switching device and a hydraulic system. Background Technology
[0002] Mechanical construction equipment is generally characterized by having multiple actuators and making troubleshooting difficult. This is because the current conventional approach to controlling the actuators is mostly to use one-to-one control, that is, one valve or one line of valves to control the action of one actuator, relying on increasing the number of control valves to achieve its multi-functionality. This not only wastes power, but also makes the hydraulic system design extremely complex, increases the amount of hoses and fittings used, and makes after-sales maintenance more troublesome.
[0003] Especially when some actuators operate infrequently but occasionally, continuing with a one-to-one control approach would increase the number of valves used, leading to higher manufacturing costs. In such cases, a multi-way valve is often needed to unify the switching oil circuit supplying the two actuators that are not operating simultaneously, thus saving the cost of multi-way valve switching connections. Currently, switching between the two actuators is usually achieved by adding an external switching valve assembly, but this has problems such as high cost, complex connection piping, and significant space occupation, making it difficult to implement. Utility Model Content
[0004] The technical problem solved by this utility model is to provide an oil circuit switching device and a hydraulic system that integrates a balance valve and a directional valve, enabling oil circuit switching and realizing the control of dual actuators by a single directional valve oil circuit; it also simplifies the pipeline structure of the oil circuit switching device, reduces its size and installation space, and facilitates installation and use.
[0005] To solve the above-mentioned technical problems, this utility model provides an oil circuit switching device, comprising: a dual balance valve group, the dual balance valve group including a first balance valve and a second balance valve; a first working oil circuit, the first working oil circuit being connected to a first main oil inlet and a first working port; a second working oil circuit, the second working oil circuit being connected to the first main oil inlet, the first balance valve and the second working port; a third working oil circuit, the third working oil circuit being connected to a second main oil inlet and a third working port; a fourth working oil circuit, the fourth working oil circuit being connected to the second main oil inlet, the second balance valve and the fourth working port; a first reversing valve, the first reversing valve being connected to the first working oil circuit and the second working oil circuit, and used to switch the on / off state of the first working oil circuit and the second working oil circuit; and a second reversing valve, the second reversing valve being connected to the third working oil circuit and the fourth working oil circuit, and used to switch the on / off state of the third working oil circuit and the fourth working oil circuit.
[0006] Optionally, the first directional valve is a two-position four-way directional valve. The first directional valve includes a first input port, a first return port, a first output port, and a second output port. The first input port is connected to the first main inlet port, the first output port is connected to the first working port, and the second output port is connected to the first balance valve.
[0007] Optionally, the second directional valve is a two-position four-way directional valve. The second directional valve includes a second input port, a second return port, a third output port, and a fourth output port. The second input port is connected to the second main inlet port, the third output port is connected to the third working port, and the fourth output port is connected to the second balance valve.
[0008] Optionally, it also includes a main return port, wherein the first return port is connected to the main return port, and the second return port is connected to the main return port.
[0009] Optionally, the first balancing valve includes: a first check valve, the first check valve including a first check valve inlet and a first check valve outlet; a first pressure valve, the first pressure valve including a first main working port and a first auxiliary working port, a second output port connected to the first check valve inlet and the first main working port, and a second working port connected to the first check valve outlet and the first auxiliary working port.
[0010] Optionally, the first pressure valve further includes a first control port, which is connected to the fourth output port.
[0011] Optionally, the second balancing valve includes: a second check valve, the second check valve including a second check valve inlet and a second check valve outlet; a second pressure valve, the second pressure valve including a second main working port and a second auxiliary working port, the fourth output port being connected to the second check valve inlet and the second main working port, and the fourth working port being connected to the second check valve outlet and the second auxiliary working port.
[0012] Optionally, the second pressure valve further includes a fourth control port, which is connected to the second output port.
[0013] Optionally, the first balance valve, the second balance valve, the first reversing valve, and the second reversing valve are integrated and mounted on the valve block, and the first main oil inlet, the second main oil inlet, the first working port, the second working port, the third working port, and the fourth working port are disposed on the surface of the valve block.
[0014] This utility model embodiment also provides a hydraulic system, including a multi-way valve and the above-mentioned oil circuit switching device, wherein the multi-way valve and the oil circuit switching device are connected.
[0015] Compared with the prior art, the technical solution of this utility model embodiment has the following beneficial effects:
[0016] The oil circuit switching device provided by this technical solution has a first working port and a third working port connected to the same actuator, and a second working port and a fourth working port connected to another actuator. A first reversing valve is connected to the first working oil circuit and the second working oil circuit. The first reversing valve can control the switching between the first working oil circuit and the second working oil circuit. A second reversing valve is connected to the third working oil circuit and the fourth working oil circuit. The second reversing valve can control the switching between the third working oil circuit and the fourth working oil circuit, thereby realizing the control of dual actuators.
[0017] Furthermore, the first balancing valve, the second balancing valve, the first reversing valve, and the second reversing valve are integrated and mounted on the valve block, and the first main oil inlet, the second main oil inlet, the first working port, the second working port, the third working port, and the fourth working port are disposed on the surface of the valve block. The integrated mounting of each valve on the valve block avoids complex pipeline connections, which helps reduce pipeline costs and the risk of pipeline leaks; moreover, the high integration of the valve assembly reduces installation space and facilitates installation layout. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the hydraulic principle of the oil circuit switching device in one embodiment of the present invention;
[0019] Figure 2 This is a schematic diagram of the overall structure of the oil circuit switching device in one embodiment of the present invention. Detailed Implementation
[0020] As described in the background section, if a one-to-one control method is still used for actuators in mechanical equipment that are not frequently used, there will be problems such as power waste and complex hydraulic system pipeline connections.
[0021] To address the aforementioned problems, this utility model provides an oil circuit switching device and a hydraulic system. The oil circuit switching device includes a first working oil circuit, a second working oil circuit, a third working oil circuit, and a fourth working oil circuit. The first working oil circuit connects to a first main oil inlet, a first directional valve, and a first working port. The second working oil circuit connects to the first main oil inlet, the first directional valve, a first balance valve, and a second working port. The third working oil circuit connects to the second main oil inlet, the second directional valve, and the third working port. The fourth working oil circuit connects to the second main oil inlet, the second directional valve, the second balance valve, and the fourth working port. The first and third working ports are connected to the same actuator, while the second and fourth working ports are connected to another actuator. By switching the first directional valve, the on / off state of the first and second working oil circuits can be switched, thereby enabling switching between the two actuators. By switching the second directional valve, the on / off state of the third and fourth working oil circuits can be switched, thereby enabling switching between the two actuators. This reduces the complexity of pipeline connections and lowers costs.
[0022] To make the above-mentioned objectives, features and beneficial effects of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0023] Figure 1 This is a schematic diagram of the hydraulic principle of the oil circuit switching device in one embodiment of the present invention; Figure 2 This is a schematic diagram of the overall structure of the oil circuit switching device in one embodiment of the present invention.
[0024] refer to Figure 1 The oil circuit switching device 1 includes: a dual balance valve group, which includes a first balance valve 10 and a second balance valve 20; a first working oil circuit Z1, which connects a first main oil inlet P and a first working port A; a second working oil circuit Z2, which connects the first main oil inlet P, the first balance valve 10, and the second working port C1; a third working oil circuit Z3, which connects a second main oil inlet R and a third working port B; and a fourth working oil circuit Z4, which connects the fourth... The working oil circuit Z4 is connected to the second main oil inlet R, the second balance valve 20, and the fourth working port C2; the first reversing valve 30 is connected to the first working oil circuit Z1 and the second working oil circuit Z2, and is used to switch the on / off state of the first working oil circuit Z2 and the second working oil circuit Z2; the second reversing valve 40 is connected to the third working oil circuit Z3 and the fourth working oil circuit Z4, and is used to switch the on / off state of the third working oil circuit Z3 and the fourth working oil circuit Z4.
[0025] In this embodiment, the first working port A and the third working port B are connected to one of the actuators (not shown) of the mechanical equipment. By controlling the oil to enter the actuator from the first working port A and flow out of the actuator from the third working port B, or by controlling the oil to enter the actuator from the third working port B and flow out of the actuator from the first working port A, the actuator can be controlled to complete the corresponding action.
[0026] In this embodiment, the second working port C1 and the fourth working port C2 are connected to another actuator (not shown) of the mechanical equipment. Similarly, by controlling the oil to flow in from the second working port C1 and out from the fourth working port C2, or to flow in from the fourth working port C2 and out from the second working port C1, the other actuator can be controlled to complete the corresponding action.
[0027] In this embodiment, the first main oil inlet P and the second main oil inlet R can be connected to the oil inlet and outlet ports of other valves, such as to one of the sets of oil inlet and outlet ports of a multi-way valve, so as to realize the action switching of the dual actuators controlled by the oil circuit switching device.
[0028] Continue to refer to Figure 1 The first directional valve 30 is a two-position four-way directional valve. The first directional valve 30 includes a first input port P1, a first return port T1, a first output port A1, and a second output port B1. The first input port A1 is connected to the first main inlet port P, the first output port A1 is connected to the first working port A, and the second output port B1 is connected to the first balance valve 10.
[0029] The second directional valve 40 is a two-position four-way directional valve. The second directional valve 40 includes a second input port P2, a second return port T2, a third output port A2 and a fourth output port B2. The second input port P2 is connected to the second main inlet port R, the third output port A2 is connected to the third working port B, and the fourth output port B2 is connected to the second balance valve 20.
[0030] Continue to refer to Figure 1 The oil circuit switching device 1 further includes a main oil return port T, wherein the first oil return port T1 is connected to the main oil return port T, and the second oil return port T2 is connected to the main oil return port T.
[0031] In this embodiment, when the first reversing valve 30 is not energized, the first input port P1 is connected to the first output port A1, and the second output port B1 is connected to the first return port T1; when the first reversing valve 30 is energized, the first input port P1 is connected to the second output port B1, and the first output port A1 is connected to the first return port T1.
[0032] Similarly, in this embodiment, when the second reversing valve 40 is not energized, the second input port P2 is connected to the third output port A2, and the fourth output port B2 is connected to the second return port T2; when the second reversing valve 40 is energized, the second input port P2 is connected to the fourth output port B2, and the third output port A2 is connected to the second return port T2.
[0033] In this embodiment, when neither the first reversing valve 30 nor the second reversing valve 40 is energized, the oil enters the first reversing valve 30 from the main oil inlet P, enters the actuator through the first input port P1, the first output port A1, and the first working port A, flows out of the actuator through the third working port B, and then returns to the second main oil inlet R through the third output port A2 and the second input port P2. At this time, the second main oil inlet R serves as the return oil port.
[0034] Correspondingly, when neither the first reversing valve 30 nor the second reversing valve 40 is energized, the oil can also enter the oil circuit reversing device from the second main oil inlet R and then flow out from the first main oil inlet P, thereby realizing the action of the actuator connected to the first working port A and the third working port B. The specific oil flow path can be referred to the above description, and will not be repeated here.
[0035] Continue to refer to Figure 1 The first balancing valve 10 includes: a first check valve 11, which includes a first check valve inlet 111 and a first check valve outlet 112; a first pressure valve 12, which includes a first main working port a1, a first auxiliary working port b1 and a first control port c1; a second output port B1 connected to the first check valve inlet 111 and the first main working port a1; a second working port C1 connected to the first check valve outlet 112 and the first auxiliary working port b1; and the first control port c1 connected to the fourth output port B2.
[0036] Continue to refer to Figure 1 The second balance valve 20 includes: a second check valve 21, which includes a second check valve inlet 211 and a second check valve outlet 212; a second pressure valve 22, which includes a second main working port a2, a second auxiliary working port b2 and a second control port c2; a fourth output port B2 connected to the second check valve inlet 211 and the second main working port a2; a fourth working port C2 connected to the second check valve outlet 212 and the second auxiliary working port b2; and a fourth control port c2 connected to the second output port B1.
[0037] In this embodiment, when both the first reversing valve 30 and the second reversing valve 40 are energized, the oil enters the first reversing valve 30 from the main inlet P, passes through the first input port P1, the second output port B1, the first check valve 11, and the second working port C1 to enter another actuator. At the same time, part of the oil from the second output port B1 enters the second control port C2 of the second pressure valve 22 to control the second pressure valve 22 to open. After the oil flows out of the actuator through the fourth working port C2, it returns to the second main inlet R through the second pressure valve 22, the fourth output port B2, and the second input port P2, thereby realizing the operation of the actuator connected by the second working port C1 and the fourth working port C2.
[0038] Correspondingly, when both the first reversing valve 30 and the second reversing valve 40 are energized, the oil can also enter the oil reversing device from the second main oil inlet R, and then flow out of the oil reversing device from the first main oil inlet P, thereby realizing the action of the actuator connected to the second working port C1 and the fourth working port C2. The specific oil flow path can be referred to the above description, and will not be repeated here.
[0039] It should also be noted that when neither the first reversing valve 30 nor the second reversing valve 40 is energized, the oil flows through the first main inlet P and the first reversing valve 30 to the first working port A, then flows into the third working port B and then through the second reversing valve 40 to the second main inlet R; or it flows into the second main inlet R and out of the first main inlet P. At this time, the first main working port a1 of the first pressure valve 12, the second control port c2 of the second pressure valve 22, the second output port B1, and the first return port T1 are connected, flowing to the main return port T; the second main working port a2 of the second pressure valve 22, the first control port c1 of the first pressure valve 12, the fourth output port B2, and the second return port T2 are connected, flowing to the main return port T. Since there is no oil at the first control port c1 and the second control port c2, the first pressure valve 12 and the second pressure valve 22 are closed, preventing oil from leaking from the second working port C1 and the fourth working port C2 through the first pressure valve 12 and the second pressure valve 22, thus ensuring the safe operation of the actuators connected to the second working port C1 and the fourth working port C2.
[0040] refer to Figure 2 In this embodiment, the first balance valve 10, the second balance valve 20, the first reversing valve 30 and the second reversing valve 40 are integrated and mounted on the valve block 50, and the first main oil inlet P, the second main oil inlet R, the first working port A, the second working port C1, the third working port B and the fourth working port C2 are disposed on the surface of the valve block 50.
[0041] In this embodiment, the valve assembly is integrated, which can reduce pipeline connections, avoid complex pipeline design, and reduce pipeline costs and the risk of pipeline leakage. On the other hand, it also greatly reduces the installation space and the difficulty of spatial layout.
[0042] Accordingly, this utility model embodiment also provides a hydraulic system (not shown), including a multi-way valve (not shown) and the above-mentioned oil circuit switching device 1, wherein the multi-way valve and the oil circuit switching device 1 are connected.
[0043] In this embodiment, for commonly used actuators in mechanical equipment, a multi-way valve can be used to achieve one-to-one control. At the same time, the oil circuit switching device 1 is used to control the oil circuit switching between less frequently used actuators, which helps to control costs and reduce the complexity of pipeline connections.
[0044] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.
Claims
1. An oil circuit switching device, characterized in that, include: A dual-balance valve assembly, comprising a first balance valve and a second balance valve; The first working oil circuit is connected to the first main oil inlet and the first working port; The second working oil circuit is connected to the first main oil inlet, the first balance valve, and the second working port. The third working oil circuit is connected to the second main oil inlet and the third working port; The fourth working oil circuit is connected to the second main oil inlet, the second balance valve and the fourth working port; A first directional valve is connected to the first working oil circuit and the second working oil circuit, and is used to switch the on / off state of the first working oil circuit and the second working oil circuit. The second directional valve is connected to the third working oil circuit and the fourth working oil circuit, and is used to switch the on / off state of the third working oil circuit and the fourth working oil circuit.
2. The oil circuit switching device as described in claim 1, characterized in that, The first directional valve is a two-position four-way directional valve. The first directional valve includes a first input port, a first return port, a first output port, and a second output port. The first input port is connected to the first main inlet port, the first output port is connected to the first working port, and the second output port is connected to the first balance valve.
3. The oil circuit switching device as described in claim 2, characterized in that, The second directional valve is a two-position four-way directional valve. The second directional valve includes a second input port, a second return port, a third output port and a fourth output port. The second input port is connected to the second main inlet port, the third output port is connected to the third working port, and the fourth output port is connected to the second balance valve.
4. The oil circuit switching device as described in claim 3, characterized in that, It also includes a main oil return port, with the first oil return port connected to the main oil return port and the second oil return port connected to the main oil return port.
5. The oil circuit switching device as described in claim 3, characterized in that, The first balancing valve includes: a first check valve, the first check valve including a first check valve inlet and a first check valve outlet; a first pressure valve, the first pressure valve including a first main working port and a first auxiliary working port, a second output port connected to the first check valve inlet and the first main working port, and a second working port connected to the first check valve outlet and the first auxiliary working port.
6. The oil circuit switching device as described in claim 5, characterized in that, The first pressure valve further includes a first control port, which is connected to the fourth output port.
7. The oil circuit switching device as described in claim 3, characterized in that, The second balancing valve includes: a second check valve, the second check valve including a second check valve inlet and a second check valve outlet; a second pressure valve, the second pressure valve including a second main working port and a second auxiliary working port; the fourth output port is connected to the second check valve inlet and the second main working port; and the fourth working port is connected to the second check valve outlet and the second auxiliary working port.
8. The oil circuit switching device as described in claim 7, characterized in that, The second pressure valve also includes a fourth control port, which is connected to the second output port.
9. The oil circuit switching device as described in claim 1, characterized in that, The first balance valve, the second balance valve, the first reversing valve, and the second reversing valve are integrated and mounted on the valve block, and the first main oil inlet, the second main oil inlet, the first working port, the second working port, the third working port, and the fourth working port are disposed on the surface of the valve block.
10. A hydraulic system, characterized in that, It includes a multi-way valve and an oil circuit switching device as described in any one of claims 1 to 9, wherein the multi-way valve and the oil circuit switching device are connected.