Hydraulic switch switching system

Abstract

The invention discloses a hydraulic switch switching system, which relates to the technical field of hydraulic control systems and comprises a plurality of reversing valves, ports P of the reversing valves are communicated with a main oil inlet, ports T of the reversing valves are communicated with a main oil return port, working oil ports of the reversing valves are respectively communicated with an oil inlet of a main pipeline through branch pipelines, first valves are arranged on the branch pipelines, and second valves are arranged on the branch pipelines. An oil outlet of the main pipeline is communicated with a working cavity oil port of the execution element; the multiple reversing valves are arranged in parallel, each reversing valve corresponds to one switching oil way, opening and closing of different switching oil ways can be achieved by controlling opening and closing of the first valve, and therefore switching of the switching oil ways is achieved, when the reversing valve in a certain switching oil way needs to be overhauled or replaced, the other switching oil ways can be switched to work, and the switching efficiency is improved. The equipment can work normally, and the working efficiency and the production capacity of the equipment are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic control systems, and in particular to a hydraulic switch switching system. Background Art

[0002] Hydraulic systems play an important role in the production of machinery manufacturing industry. A complete hydraulic system consists of five parts, namely power elements, actuators, control elements, auxiliary elements and hydraulic oil. According to the actual situation, the corresponding control elements can be reasonably selected to achieve better use results.

[0003] In the hydraulic systems known to the applicant, the system output power is often controlled by control elements in a single oil circuit. During long-term use, the control elements may be damaged or fail due to the influence of the environment and load. At this time, the control elements need to be repaired or replaced, which will cause the control system to fail to work properly and affect the working efficiency and production capacity of the equipment controlled by the hydraulic control system.

[0004] Therefore, people are in urgent need of a hydraulic switch switching system that can switch the oil circuit to ensure the working efficiency and production capacity of the equipment. Summary of the invention

[0005] The purpose of the present invention is to provide a hydraulic switch switching system to solve the problems existing in the above-mentioned prior art. By setting up multiple switch oil circuits in the system and switching the switch oil circuits, the working efficiency and production capacity of the equipment can be guaranteed.

[0006] To achieve the above-mentioned purpose, the present invention provides the following solution: The present invention provides a hydraulic switch switching system, comprising a plurality of reversing valves, wherein the P port of the reversing valve is connected to the main oil inlet, the T port of the reversing valve is connected to the main oil return port, the working oil ports of the plurality of reversing valves are respectively connected to the oil inlet of the main pipeline through branch pipelines, a first valve is arranged on the branch pipeline, and the oil outlet of the main pipeline is connected to the oil port of the working chamber of the actuator.

[0007] Preferably, the hydraulic switch switching system also includes an independent oil inlet pipeline and an independent oil return pipeline, the oil inlet of the independent oil inlet pipeline is connected to the total oil inlet, the oil outlet of the independent oil inlet pipeline is connected to the working chamber oil port of the actuator, the oil inlet of the independent oil return pipeline is connected to the working chamber oil port of the actuator, the oil outlet of the independent oil return pipeline is connected to the total oil return port, a second valve is provided on the independent oil inlet pipeline, and a third valve is provided on the independent oil return pipeline.

[0008] Preferably, the second valve and the third valve are both plate-type high-pressure ball valves.

[0009] Preferably, the hydraulic switch switching system also includes a control reversing valve and a first hydraulically controlled one-way valve, the P port of the control reversing valve is connected to the total oil inlet, the first hydraulically controlled one-way valve is arranged on the pipeline connecting the P port of the reversing valve and the total oil inlet, the working oil port of the control reversing valve is connected to the control oil port of the first hydraulically controlled one-way valve, and the T port of the control reversing valve is connected to the total oil drain port.

[0010] Preferably, the P ports of the plurality of reversing valves are connected to the main oil inlet via a common pipeline, and the first hydraulically controlled one-way valve is arranged on the common pipeline.

[0011] Preferably, a second hydraulically controlled one-way valve is provided on the main pipe, and a control oil port of the second hydraulically controlled one-way valve is connected to a working oil port of the control reversing valve.

[0012] Preferably, the number of the reversing valves is two, and the two reversing valves are a proportional reversing valve and an electromagnetic reversing valve respectively.

[0013] Preferably, the branch pipeline connected to the proportional reversing valve and the branch pipeline connected to the electromagnetic reversing valve are respectively connected to two oil inlets of the three-way valve, the oil outlet of the three-way valve is connected to the oil inlet of the main pipeline, and the three-way valve serves as the two first valves corresponding to the proportional reversing valve and the electromagnetic reversing valve.

[0014] Preferably, a superimposed double one-way throttle valve is provided on the pipeline between the working oil port of the electromagnetic reversing valve and the first valve.

[0015] Preferably, a high-pressure ball valve is provided on the main pipe.

[0016] Compared with the prior art, the present invention mainly achieves the following technical effects:

[0017] Multiple reversing valves are arranged in parallel, and each reversing valve corresponds to a switch oil circuit. The opening and closing of different switch oil circuits can be realized by controlling the opening and closing of the first valve, thereby switching the switch oil circuit. When the reversing valve in a switch oil circuit needs to be repaired or replaced, it can be switched to other switch oil circuits to work, so that the equipment can work normally and ensure the working efficiency and production capacity of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 A system schematic diagram of a hydraulic switch switching system in an embodiment of the present invention;

[0020] Among them, 1. actuator; 2. three-way valve; 3. proportional reversing valve; 4. solenoid reversing valve; 5. control reversing valve; 6. second valve; 7. third valve; 8. first hydraulically controlled one-way valve; 9. second hydraulically controlled one-way valve; 10. one-way throttle valve; 11. pressure measuring port; 12. high-pressure ball valve. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] The purpose of the present invention is to provide a hydraulic switch switching system to solve the problems existing in the prior art. By setting up multiple switch oil circuits in the system and switching the switch oil circuits, the working efficiency and production capacity of the equipment can be guaranteed.

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figure 1 As shown, a hydraulic switch switching system is provided, including multiple reversing valves, the P port of the reversing valve is connected to the main oil inlet, the main oil inlet is connected to the oil tank through the hydraulic pump, the T port of the reversing valve is connected to the main oil return port, the main oil return port is connected to the oil tank, the working oil ports of the multiple reversing valves are respectively connected to the oil inlet of the main pipeline through the branch pipeline, the first valve is arranged on the branch pipeline, the oil outlet of the main pipeline is connected to the working chamber oil port of the actuator 1, and the reversing valve is used to switch the branch pipeline to be connected to the P port or the T port; multiple reversing valves are arranged in parallel, and each reversing valve corresponds to a switch oil circuit, and the opening and closing of different switch oil circuits can be realized by controlling the opening and closing of the first valve, thereby realizing the switching of the switch oil circuit, and when the reversing valve in a switch oil circuit needs to be repaired or replaced, it can be switched to other switch oil circuits for operation, so that the equipment can work normally and ensure the working efficiency and production capacity of the equipment.

[0025] The actuator 1 in this embodiment is a single-acting hydraulic cylinder, and the oil outlet of the main pipeline is connected to the oil port of the working chamber of the single-acting hydraulic cylinder; in other embodiments, if the selected actuator 1 includes multiple working chambers, such as a hydraulic cylinder with working chambers on both sides of the piston, multiple working chambers can be set to respectively connect a set of hydraulic switch switching systems in this embodiment.

[0026] In order to improve the switchability of the system, the hydraulic switch switching system in this embodiment also includes an independent oil inlet pipeline and an independent oil return pipeline. The oil inlet of the independent oil inlet pipeline is connected to the total oil inlet, the oil outlet of the independent oil inlet pipeline is connected to the working chamber oil port of the actuator 1, the oil inlet of the independent oil return pipeline is connected to the working chamber oil port of the actuator 1, the oil outlet of the independent oil return pipeline is connected to the total oil return port, a second valve 6 is arranged on the independent oil inlet pipeline, and a third valve 7 is arranged on the independent oil return pipeline. When multiple reversing valves cannot work normally, the oil can be supplied to the working chamber of the actuator 1 by opening the second valve 6, and the oil can be returned to the working chamber of the actuator 1 by opening the third valve 7. In this embodiment, the independent oil inlet pipeline and the independent oil return pipeline are both connected to the main pipeline.

[0027] In order to adapt to the hydraulic environment, in this embodiment, the second valve 6 and the third valve 7 are both plate-type high-pressure ball valves; in other embodiments, other opening and closing valves applicable to the hydraulic system can also be selected as the second valve 6 and the third valve 7, such as solenoid valves.

[0028] In this embodiment, the hydraulic switch switching system also includes a control reversing valve 5 and a first hydraulically controlled non-return valve 8. The P port of the control reversing valve 5 is connected to the main oil inlet. The first hydraulically controlled non-return valve 8 is arranged on the pipeline connecting the P port of the reversing valve and the main oil inlet. The working oil port of the control reversing valve 5 is connected to the control oil port of the first hydraulically controlled non-return valve 8, and the T port of the control reversing valve 5 is connected to the main oil drain port. When the P port of the control reversing valve 5 is connected to the working oil port, the hydraulic oil enters the control oil port of the first hydraulically controlled non-return valve 8, the first hydraulically controlled non-return valve 8 is opened, and the switch oil circuit can flow the hydraulic oil normally. When the T port of the control reversing valve 5 is connected to the working oil port, the first hydraulically controlled non-return valve 8 is closed and exists as a non-return valve, and the hydraulic oil at the main oil inlet cannot enter each switch oil circuit, that is, the oil on and off of the overall system is realized by the cooperation of the control reversing valve 5 and the first hydraulically controlled non-return valve 8.

[0029] The control reversing valve 5 can be a two-position four-way electromagnetic reversing valve, wherein the A port or the B port is connected to the control oil port of the first hydraulically controlled one-way valve 8 .

[0030] The P ports of the multiple reversing valves are all connected to the main oil inlet through a common pipeline, and the first hydraulically controlled one-way valve 8 is arranged on the common pipeline, thereby reducing the number of the first hydraulically controlled one-way valves 8 arranged.

[0031] A second hydraulically controlled one-way valve 9 is provided on the main pipeline, and the control oil port of the second hydraulically controlled one-way valve 9 is connected with the working oil port of the control reversing valve 5. The second hydraulically controlled one-way valve 9 is controlled by the control reversing valve 5. When the T port of the control reversing valve 5 is connected with the working oil port, the oil in the working chamber of the actuator 1 cannot flow back.

[0032] When the selected first hydraulically controlled one-way valve 8 and the second hydraulically controlled one-way valve 9 have oil drain ports, the oil drain ports are communicated with the main oil drain port.

[0033] In this embodiment, there are two reversing valves, which are a proportional reversing valve 3 and an electromagnetic reversing valve 4 , both of which are three-position four-way valves.

[0034] The oil drain port of the proportional reversing valve 3 is connected to the main oil drain port.

[0035] The branch pipeline connected to the proportional reversing valve 3 and the branch pipeline connected to the electromagnetic reversing valve 4 are respectively connected to the two oil inlets of the three-way valve 2, and the oil outlet of the three-way valve 2 is connected to the oil inlet of the main pipeline. The three-way valve 2 is used as two first valves corresponding to the proportional reversing valve 3 and the electromagnetic reversing valve 4. The switching of the two switch oil circuits can be controlled by the three-way valve 2. There is no need to control the two first valves twice, which can save operating steps.

[0036] A superimposed double one-way throttle valve is arranged on the pipeline between the working oil port of the electromagnetic reversing valve 4 and the first valve. The superimposed double one-way throttle valve includes two one-way throttle valves 10. The one-way valve parts of the two one-way throttle valves 10 face opposite directions, so that throttling effect is achieved during oil inlet and oil return.

[0037] In this embodiment, a high-pressure ball valve 12 is provided at the oil port of the working chamber of the actuator 1 , and the high-pressure ball valve 12 can be used to cut off the actuator 1 from the system, thereby facilitating the replacement of other actuators 1 .

[0038] The oil pressure in the system can be measured by setting a plurality of pressure measuring points 11. In the present embodiment, three pressure measuring points 11 are provided, which are respectively connected to the main oil inlet, the main oil return port and the main pipeline.

[0039] During actual use, the control reversing valve 5 is first opened, and the first hydraulically controlled one-way valve 8 and the second hydraulically controlled one-way valve 9 are opened, and the system can flow oil normally. When the proportional reversing valve 3 needs to be repaired or replaced, the three-way valve 2 is adjusted to connect the switch oil circuit where the electromagnetic reversing valve 4 is located with the main circuit. At this time, the electromagnetic reversing valve 4 is used to complete the control of the actuator 1; when both the proportional reversing valve 3 and the electromagnetic reversing valve 4 need to be repaired or replaced, the control of the actuator 1 can be completed by controlling the second valve 6 and the third valve 7.

[0040] Adaptive changes made according to actual needs are all within the protection scope of the present invention.

[0041] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.

[0042] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A hydraulic switch switching system, characterized in that: It includes multiple reversing valves, the P port of the reversing valve is connected to the main oil inlet, the T port of the reversing valve is connected to the main oil return port, the working oil ports of the multiple reversing valves are connected to the oil inlet of the main pipeline through branch pipelines, the branch pipeline is provided with a first valve, and the oil outlet of the main pipeline is connected to the working chamber oil port of the actuator.

2. The hydraulic switch switching system according to claim 1, characterized in that: The hydraulic switch switching system also includes an independent oil inlet pipeline and an independent oil return pipeline. The oil inlet of the independent oil inlet pipeline is connected to the total oil inlet, the oil outlet of the independent oil inlet pipeline is connected to the working chamber oil port of the actuator, the oil inlet of the independent oil return pipeline is connected to the working chamber oil port of the actuator, the oil outlet of the independent oil return pipeline is connected to the total oil return port, a second valve is arranged on the independent oil inlet pipeline, and a third valve is arranged on the independent oil return pipeline.

3. The hydraulic switch switching system according to claim 2, characterized in that: The second valve and the third valve are both plate-type high-pressure ball valves.

4. The hydraulic switch switching system according to claim 1, characterized in that: The hydraulic switch switching system also includes a control reversing valve and a first hydraulically controlled one-way valve, the P port of the control reversing valve is connected to the total oil inlet, the first hydraulically controlled one-way valve is arranged on the pipeline connecting the P port of the reversing valve and the total oil inlet, the working oil port of the control reversing valve is connected to the control oil port of the first hydraulically controlled one-way valve, and the T port of the control reversing valve is connected to the total oil drain port.

5. The hydraulic switch switching system according to claim 4, characterized in that: The P ports of the plurality of reversing valves are all connected to the main oil inlet via a common pipeline, and the first hydraulically controlled one-way valve is arranged on the common pipeline.

6. The hydraulic switch switching system according to claim 4, characterized in that: A second hydraulically controlled one-way valve is arranged on the main pipe, and a control oil port of the second hydraulically controlled one-way valve is communicated with a working oil port of the control reversing valve.

7. The hydraulic switch switching system according to claim 1, characterized in that: There are two reversing valves, and the two reversing valves are a proportional reversing valve and an electromagnetic reversing valve respectively.

8. The hydraulic switch switching system according to claim 7, characterized in that: The branch pipeline connected to the proportional reversing valve and the branch pipeline connected to the electromagnetic reversing valve are respectively connected to the two oil inlets of the three-way valve, the oil outlet of the three-way valve is connected to the oil inlet of the main pipeline, and the three-way valve serves as the two first valves corresponding to the proportional reversing valve and the electromagnetic reversing valve.

9. The hydraulic switch switching system according to claim 7, characterized in that: A superimposed double one-way throttle valve is arranged on the pipeline between the working oil port of the electromagnetic reversing valve and the first valve.

10. The hydraulic switch switching system according to claim 1, characterized in that: A high-pressure ball valve is arranged on the main pipe.

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