Main and standby hydraulic switching device and hydraulic system

Abstract

The utility model relates to the technical field of hydraulic devices, in particular to a main and standby hydraulic switching device and a hydraulic system. The main and standby hydraulic switching device comprises a hydraulic cylinder, a first loop and a second loop, and the first loop and the second loop are connected to the two ends of the hydraulic cylinder respectively. The first loop comprises a first branch and a second branch, the first branch is provided with a first main one-way element, and the second branch is provided with a first standby one-way element; the second loop comprises a third branch and a fourth branch, the third branch is provided with a second main one-way element, and the fourth branch is provided with a second standby one-way element. According to the main and standby hydraulic switching device, switching can be conducted in time when the main hydraulic system breaks down or needs to be maintained, the hydraulic cylinder can work again, the reliability and stability of the hydraulic cylinder are improved, and stage performance is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic device technical field especially is related to a main and spare hydraulic switching device and hydraulic system. BACKGROUND

[0002] In the stage performance process, often need to use hydraulic equipment, the hydraulic equipment on the stage realizes the transmission of hydraulic power through the telescoping of hydraulic cylinder. The first loop and the second loop of the existing hydraulic cylinder only have a single branch, when the single branch fails, the hydraulic cylinder cannot normally extend and retract. Since the standby branch is not set, the hydraulic cylinder cannot be switched to the standby branch in time to work again, the reliability and stability of the hydraulic cylinder are poor, which brings inconvenience to the stage performance. SUMMARY

[0003] The utility model discloses a main and spare hydraulic switching device and hydraulic system, to alleviate the single branch of the hydraulic cylinder in the existing hydraulic equipment fails and the hydraulic cylinder cannot normally extend and retract problem.

[0004] In order to solve the above technical problem, the technical scheme provided by the utility model is:

[0005] Firstly, the utility model provides a main and spare hydraulic switching device, which comprises a hydraulic cylinder, a first loop and a second loop, the first loop and the second loop are connected to the two ends of the hydraulic cylinder respectively;

[0006] The first loop comprises a first branch and a second branch, the first branch is provided with a first main one-way element, and the second branch is provided with a first standby one-way element.

[0007] The second loop comprises a third branch and a fourth branch, the third branch is provided with a second main one-way element, and the fourth branch is provided with a second standby one-way element.

[0008] Further,

[0009] The first main one-way element comprises a first main hydraulic station one-way valve, and the first main hydraulic station one-way valve is arranged at the end of the first branch away from the hydraulic cylinder.

[0010] Further,

[0011] A first electromagnetic valve is arranged on the first branch.

[0012] Further,

[0013] The first standby one-way element comprises a first standby hydraulic station one-way valve, and the first standby hydraulic station one-way valve is arranged at the end of the second branch away from the hydraulic cylinder.

[0014] Furthermore,

[0015] A second solenoid valve is provided on the second branch line.

[0016] Furthermore,

[0017] The second main one-way element includes a second main hydraulic station one-way valve, and the second main hydraulic station one-way valve is arranged at the end of the third branch road away from the hydraulic cylinder.

[0018] Furthermore,

[0019] The third branch line is provided with a third solenoid valve.

[0020] Furthermore,

[0021] The second backup one-way element includes a second backup hydraulic station one-way valve, and the second backup hydraulic station one-way valve is arranged at the end of the fourth branch road away from the hydraulic cylinder.

[0022] Furthermore,

[0023] A fourth solenoid valve is provided on the fourth branch line.

[0024] In a second aspect, the present invention provides a hydraulic system comprising the primary-standby hydraulic switching device described in the first aspect.

[0025] The utility model brings at least the following beneficial effects:

[0026] The utility model provides a main-standby hydraulic switching device, comprising: a hydraulic cylinder, a first circuit and a second circuit, the first circuit and the second circuit being respectively connected to the two ends of the hydraulic cylinder; the first circuit comprising a first branch road and a second branch road, the first branch road being provided with a first main one-way element, and the second branch road being provided with a first standby one-way element; the second circuit comprising a third branch road and a fourth branch road, the third branch road being provided with a second main one-way element, and the fourth branch road being provided with a second standby one-way element.

[0027] When using the main-standby hydraulic switching device, the main hydraulic system is running during normal use, the first main one-way element is opened, the first branch is connected, and the hydraulic cylinder extends; the second main one-way element is opened, the third branch is connected, and the hydraulic cylinder retracts. When the main hydraulic system fails or requires maintenance, the backup hydraulic system can be activated. At this time, the first backup one-way element is opened, the second branch is connected, and the hydraulic cylinder extends; the second backup one-way element is opened, the fourth branch is connected, and the hydraulic cylinder retracts. Since the present application provides a second branch and a fourth branch, and the second branch is provided with a first backup one-way element and the fourth branch is provided with a second backup one-way element, it is possible to switch in time when the main hydraulic system fails or requires maintenance, so that the hydraulic cylinder can work again, thereby improving the reliability and stability of the hydraulic cylinder and facilitating stage performances.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in related technologies, the following briefly introduces the drawings required for use in the specific implementation methods or related technical descriptions. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 A schematic diagram of the main and standby hydraulic switching device provided in an embodiment of the present utility model.

[0031] icon:

[0032] 100-hydraulic cylinder; 200-first circuit; 210-first branch road; 220-second branch road; 300-second circuit; 310-third branch road; 320-fourth branch road; 410-first main hydraulic station one-way valve; 420-first solenoid valve; 510-first backup hydraulic station one-way valve; 520-second solenoid valve; 610-second main hydraulic station one-way valve; 620-third solenoid valve; 710-second backup hydraulic station one-way valve; 720-fourth solenoid valve. DETAILED DESCRIPTION

[0033] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0035] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Physical quantities in formulas, unless separately marked, should be understood as basic quantities of the International System of Units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0036] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0037] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0038] The following describes some embodiments of the present invention in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features of the embodiments can be combined with each other. Figure 1 A schematic diagram of the main and standby hydraulic switching device provided in an embodiment of the present utility model.

[0039] Example 1

[0040] In existing stage hydraulic equipment, the hydraulic cylinder's primary and secondary circuits each have a single branch. If a single branch fails, the hydraulic cylinder will not retract or extend properly. Because there is no backup circuit, the hydraulic cylinder cannot be switched to the backup circuit in a timely manner to resume operation. This results in poor reliability and stability, causing inconvenience during stage performances.

[0041] In view of this, an embodiment of the present invention provides a main-standby hydraulic switching device, including: a hydraulic cylinder 100, a first circuit 200 and a second circuit 300, the first circuit 200 and the second circuit 300 are respectively connected to the two ends of the hydraulic cylinder 100; the first circuit 200 includes a first branch road 210 and a second branch road 220, the first branch road 210 is provided with a first main one-way element, and the second branch road 220 is provided with a first standby one-way element; the second circuit 300 includes a third branch road 310 and a fourth branch road 320, the third branch road 310 is provided with a second main one-way element, and the fourth branch road 320 is provided with a second standby one-way element.

[0042] When the main-standby hydraulic switching device is used, the main hydraulic system is in operation during normal use, the first main one-way element is opened, the first branch 210 is connected, and the hydraulic cylinder 100 is extended; the second main one-way element is opened, the third branch 310 is connected, and the hydraulic cylinder 100 is retracted. When the main hydraulic system fails or requires maintenance, the backup hydraulic system can be activated. At this time, the first backup one-way element is opened, the second branch 220 is connected, and the hydraulic cylinder 100 is extended; the second backup one-way element is opened, the fourth branch 320 is connected, and the hydraulic cylinder 100 is retracted. Since the present application is provided with a second branch 220 and a fourth branch 320, and the second branch 220 is provided with a first backup one-way element and the fourth branch 320 is provided with a second backup one-way element, it is possible to switch in time when the main hydraulic system fails or requires maintenance, so that the hydraulic cylinder 100 can work again, thereby improving the reliability and stability of the hydraulic cylinder 100 and facilitating stage performances.

[0043] In an optional manner of this embodiment, the first main one-way element includes a first main hydraulic station one-way valve 410 , and the first main hydraulic station one-way valve 410 is disposed at the end of the first branch line 210 away from the hydraulic cylinder 100 .

[0044] See Figure 1 During normal use, the main hydraulic system is running, the first main hydraulic station one-way valve 410 is opened, the first branch road 210 is connected, and the hydraulic cylinder 100 can be extended.

[0045] For further information, please see Figure 1 A first solenoid valve 420 is provided on the first branch 210 .

[0046] In an optional manner of this embodiment, the second main one-way element includes a second main hydraulic station one-way valve 610 , and the second main hydraulic station one-way valve 610 is provided at the end of the third branch 310 away from the hydraulic cylinder 100 .

[0047] During normal use, the main hydraulic system is in operation, the one-way valve 610 of the second main hydraulic station is opened, the third branch line 310 is connected, and the hydraulic cylinder 100 can be retracted.

[0048] Further, the third branch 310 is provided with a third electromagnetic valve 620.

[0049] When the main hydraulic system is running, the first main hydraulic station check valve 410 is opened, and the first electromagnetic valve 420 and the third electromagnetic valve 620 are opened, and the hydraulic cylinder 100 is extended; the second main hydraulic station check valve 610 is opened, and the first electromagnetic valve 420 and the third electromagnetic valve 620 are opened, and the hydraulic cylinder 100 is retracted.

[0050] In an optional mode of the embodiment, the first standby check element includes a first standby hydraulic station check valve 510, and the first standby hydraulic station check valve 510 is arranged at the end of the second branch 220 away from the hydraulic cylinder 100.

[0051] Please refer to Figure 1 When the main hydraulic system fails or needs maintenance, the standby hydraulic system can be enabled. At this time, the first standby hydraulic station check valve 510 is opened, the second branch 220 is connected, and the hydraulic cylinder 100 can be extended.

[0052] Further, please continue to refer to Figure 1 , the second branch 220 is provided with a second electromagnetic valve 520.

[0053] In an optional mode of the embodiment, the second standby check element includes a second standby hydraulic station check valve 710, and the second standby hydraulic station check valve 710 is arranged at the end of the fourth branch 320 away from the hydraulic cylinder 100.

[0054] When the main hydraulic system fails or needs maintenance, the standby hydraulic system can be enabled. At this time, the second standby hydraulic station check valve 710 is opened, the fourth branch 320 is connected, and the hydraulic cylinder 100 can be retracted.

[0055] Further, the fourth branch 320 is provided with a fourth electromagnetic valve 720.

[0056] When switching to the standby hydraulic system, the first standby hydraulic station check valve 510 is opened, and the second electromagnetic valve 520 and the fourth electromagnetic valve 720 are opened, and the hydraulic cylinder 100 is extended; the second standby hydraulic station check valve 710 is opened, and the second electromagnetic valve 520 and the fourth electromagnetic valve 720 are opened, and the hydraulic cylinder 100 is retracted.

[0057] Embodiment two

[0058] The hydraulic system provided by the embodiment of the utility model includes the main and standby hydraulic switching device of embodiment one. Since the hydraulic system includes all the structures of the main and standby hydraulic switching device, all the beneficial effects described in embodiment one are achieved, and details are not repeated here.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A main and standby hydraulic switching device, characterized in that: include: A hydraulic cylinder, a first circuit and a second circuit, wherein the first circuit and the second circuit are respectively connected to two ends of the hydraulic cylinder; The first circuit includes a first branch and a second branch, the first branch is provided with a first main one-way element, and the second branch is provided with a first backup one-way element; The second loop includes a third branch and a fourth branch. The third branch is provided with a second main one-way element, and the fourth branch is provided with a second backup one-way element.

2. The main and standby hydraulic switching device according to claim 1, characterized in that: The first main one-way element includes a first main hydraulic station one-way valve, and the first main hydraulic station one-way valve is arranged at the end of the first branch road away from the hydraulic cylinder.

3. The main and standby hydraulic switching device according to claim 2, characterized in that: A first solenoid valve is provided on the first branch line.

4. The main and standby hydraulic switching device according to claim 1, characterized in that: The first backup one-way element includes a first backup hydraulic station one-way valve, and the first backup hydraulic station one-way valve is arranged at the end of the second branch road away from the hydraulic cylinder.

5. The main and standby hydraulic switching device according to claim 4, characterized in that: A second solenoid valve is provided on the second branch line.

6. The main and standby hydraulic switching device according to claim 1, characterized in that: The second main one-way element includes a second main hydraulic station one-way valve, and the second main hydraulic station one-way valve is arranged at the end of the third branch road away from the hydraulic cylinder.

7. The main and standby hydraulic switching device according to claim 6, characterized in that: The third branch line is provided with a third solenoid valve.

8. The main and standby hydraulic switching device according to claim 1, characterized in that: The second backup one-way element includes a second backup hydraulic station one-way valve, and the second backup hydraulic station one-way valve is arranged at the end of the fourth branch road away from the hydraulic cylinder.

9. The main and standby hydraulic switching device according to claim 8, characterized in that: A fourth solenoid valve is provided on the fourth branch line.

10. A hydraulic system, characterized in that: It comprises the main-standby hydraulic switching device as described in any one of claims 1-9.

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