Hydraulic device for multi-stage oil cylinder of working bucket of insulated boom truck

Abstract

A hydraulic device for a multi-stage oil cylinder of a working bucket of an insulated boom truck comprises a balance valve (10) arranged on the multi-stage oil cylinder of the working bucket of the insulated boom truck and a pressure reduction overflow valve (20) arranged on the balance valve (10) and provided with a connector (2) and a connector (1), and hydraulic control over the multi-stage oil cylinder of the working bucket of the insulated boom truck is achieved through the balance valve (10). By means of the pressure reduction overflow valve (20), variable high-pressure liquid is injected into the balance valve (10), the multi-stage oil cylinder of the working bucket of the insulated boom truck is in a uniform extending state, and the technical problem that the speed suddenly rises when the balance valve is used and the multi-stage oil cylinder of the working bucket of the insulated boom truck extends out at different stages is solved. Therefore, the safety performance of operators in the working bucket is improved.

Description

Technical Field

[0001] The utility model relates to a hydraulic device, in particular to a hydraulic device for a multi-stage oil cylinder of a working bucket of an insulating bucket arm vehicle. Background Art

[0002] The insulated boom truck is a special vehicle that performs intermediate potential operations in places with convenient transportation and complex wiring. The multi-stage oil cylinder of the working bucket of the insulated boom truck is used to lift the working bucket of the insulated boom truck. Therefore, the hydraulic device of the multi-stage oil cylinder of the working bucket of the insulated boom truck is an important component of the insulated boom truck. In the existing hydraulic devices of the multi-stage oil cylinder of the working bucket of the insulated boom truck, a balancing valve is still used. Since the rodless cavity area of ​​each stage of the multi-stage oil cylinder is different, this leads to different extension speeds at the same flow rate, which will result in a slow speed when the first stage works and a fast speed when the second stage works. There will be a sudden jump in speed when extending at different stages, which affects the safety performance of the operator in the working bucket.

[0003] The utility model uses the technical feature of making the multi-stage oil cylinder of the working bucket of the insulated boom truck in a uniform speed extension state to effectively explore and study the technical problem that the balance valve is used and the speed suddenly jumps when extending at different levels.

[0004] The statements here only provide background technology related to the utility model and do not necessarily constitute prior art. The application technical solution of the present invention is made based on the technical briefing document provided by the applicant on March 11, 2024, which solves actual technical problems in the work process, and the existing technical problems, technical features and technical effects in similar patent documents and background technologies obtained through retrieval. Summary of the invention

[0005] The object of the utility model is a hydraulic device for a multi-stage oil cylinder of a working bucket of an insulating bucket arm truck.

[0006] In order to overcome the above technical shortcomings, the purpose of the utility model is to provide a hydraulic device for a multi-stage cylinder in the working bucket of an insulated boom truck, thereby improving the safety performance of operators in the working bucket.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: comprising a balancing valve arranged on the multi-stage oil cylinder of the working bucket of the insulated bucket truck, and a pressure reducing and overflow valve arranged on the balancing valve and having an interface and an interface.

[0008] Due to the design of the balancing valve and the pressure reducing relief valve, the hydraulic control of the multi-stage cylinders of the working bucket of the insulated boom truck is realized through the balancing valve, and the variable high-pressure liquid is injected into the balancing valve through the pressure reducing relief valve, so that the multi-stage cylinders of the working bucket of the insulated boom truck are in a uniformly extended state, which solves the technical problem of using balancing valves and sudden speed jumps when extending at different stages, thereby improving the safety performance of operators in the working bucket.

[0009] The utility model is designed to connect the balance valve and the pressure reducing relief valve to each other in a manner that the multi-stage oil cylinder of the working bucket of the insulating bucket arm vehicle is in a uniform speed extending state.

[0010] The utility model is designed to connect the pressure reducing relief valve with the balance valve in the manner of injecting variable high-pressure liquid.

[0011] The technical effects of the above two technical solutions are: highlighting the technical characteristics of making the multi-stage cylinder of the working bucket of the insulated boom truck in a uniform speed extension state, and introducing the application in the technical field of hydraulic devices for the multi-stage cylinder of the working bucket of the insulated boom truck.

[0012] The utility model is designed that the pressure reducing relief valve is also provided with an interface.

[0013] The technical effect of the above technical solution is that the integrated installation of other components is realized, thereby expanding the technical effect of the utility model.

[0014] The utility model is designed to provide a pressure reducing relief valve on the balancing valve.

[0015] The technical effect of the above technical solution is that: through the balancing valve and the pressure reducing relief valve, the basic technical solution of the utility model is formed, and the technical problem of the utility model is solved.

[0016] The utility model is designed that the balancing valve is provided with interfaces V1, V2, C1 and C2, and the interface V2 of the balancing valve is arranged to be connected in a communicating manner with the pressure reducing relief valve, the interface V1 of the balancing valve is arranged to be connected in a communicating manner with the oil return port, and the interface C1 of the balancing valve and the interface C2 of the balancing valve are respectively arranged to be connected with the hydraulic port parts of the multi-stage cylinder of the working bucket of the insulated boom truck.

[0017] The technical effect of the above technical solution is: realizing the connection of four hydraulic ports of the multi-stage cylinder of the working bucket of the insulated boom truck.

[0018] The utility model designs that the second interface of the pressure reducing relief valve is arranged to be connected with the oil inlet in a communicating manner, the first interface of the pressure reducing relief valve is arranged to be connected with the balance valve in a communicating manner, and the third interface of the pressure reducing relief valve is arranged to be connected with the oil discharge port in a communicating manner.

[0019] The technical effect of the above technical solution is that the three hydraulic port connections of the balancing valve are realized.

[0020] The utility model is designed that the second interface of the pressure reducing relief valve and the first interface of the pressure reducing relief valve are arranged to be distributed in the manner of a pressure reducing valve.

[0021] The technical effect of the above technical solution is to realize the interface setting of the pressure reducing valve in the pressure reducing relief valve.

[0022] The utility model is designed that the first interface of the pressure reducing relief valve and the third interface of the pressure reducing relief valve are arranged to be distributed in the manner of a relief valve.

[0023] The utility model is designed that the set pressure value between the first interface of the pressure reducing relief valve and the third interface of the pressure reducing relief valve is set between the set pressure value between the second interface of the pressure reducing relief valve and the first interface of the pressure reducing relief valve and the total relief valve pressure value of the hydraulic system circuit.

[0024] The technical effect of the above two technical solutions is that the relief valve interface setting in the pressure reducing relief valve is realized.

[0025] The utility model is designed that the balancing valve and the pressure reducing relief valve are arranged to be distributed in a variable flow conveying manner.

[0026] In the technical solution, the multi-stage oil cylinder of the working bucket of the insulated bucket truck is put in a uniform speed extending state by a pressure reducing relief valve.

[0027] In the present technical scheme, the balancing valve and the pressure reducing overflow valve that enable the multi-stage oil cylinder of the working bucket of the insulated boom truck to be extended at a uniform speed are important technical features. In the technical field of hydraulic devices for the multi-stage oil cylinder of the working bucket of the insulated boom truck, it has novelty, creativity and practicality. The terms in the present technical scheme can be explained and understood using the patent literature in this technical field. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a schematic diagram of the utility model.

[0030] Balancing valve-10, pressure reducing relief valve-20. DETAILED DESCRIPTION

[0031] According to the Examination Guidelines, terms such as “having”, “including” and “comprising” used in the present invention should be understood as not precluding the existence or addition of one or more other elements or combinations thereof.

[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting 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.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In addition, the technical features involved in the different embodiments of the utility model described below can be combined with each other as long as they do not conflict with each other. In addition, unless otherwise specified, the equipment and materials used in the following embodiments are commercially available. If the processing conditions are not clearly stated, please refer to the purchased product manual or proceed according to conventional methods in the field.

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] Figure 1 This is the first embodiment of the utility model, which is specifically described in conjunction with the drawings. It includes a balancing valve 10 and a pressure reducing relief valve 20 , and the pressure reducing relief valve 20 is arranged on the balancing valve 10 .

[0037] In this embodiment, the balancing valve 10 is provided with an interface V1, an interface V2, an interface C1 and an interface C2, and the interface V2 of the balancing valve 10 is arranged to be connected in a communicating manner with the pressure reducing relief valve 20, the interface V1 of the balancing valve 10 is arranged to be connected in a communicating manner with the oil return port, and the interface C1 of the balancing valve 10 and the interface C2 of the balancing valve 10 are respectively arranged to be connected to the hydraulic port parts of the multi-stage cylinder of the working bucket of the insulated boom truck.

[0038] A supporting connection point for the pressure reducing relief valve 20 is formed by the balancing valve 10, and the connection with the pressure reducing relief valve 20 is realized by the balancing valve 10. The technical purpose is to be used as a component for controlling the multi-stage cylinder of the working bucket of the insulated boom truck.

[0039] In this embodiment, the pressure reducing relief valve 20 is provided with a second interface, a first interface and a third interface, and the second interface of the pressure reducing relief valve 20 is set to be connected to the oil inlet, and the first interface of the pressure reducing relief valve 20 is set to be connected to the balancing valve 10, and the third interface of the pressure reducing relief valve 20 is set to be connected to the oil unloading port.

[0040] A supporting connection point for the balancing valve 10 is formed by the pressure reducing relief valve 20 , and the connection with the balancing valve 10 is realized by the pressure reducing relief valve 20 . Its technical purpose is to be used as a component for controlling the high-pressure liquid flow of the balancing valve 10 .

[0041] In this embodiment, the second interface of the pressure reducing relief valve 20 and the first interface of the pressure reducing relief valve 20 are arranged to be distributed in the manner of a pressure reducing valve.

[0042] The technical purpose is to achieve flow reduction delivery for the balancing valve 10.

[0043] In this embodiment, the first interface of the pressure reducing relief valve 20 and the third interface of the pressure reducing relief valve 20 are arranged to be distributed in the manner of a relief valve.

[0044] The technical purpose is to realize rapid oil unloading of the balancing valve 10.

[0045] In this embodiment, the set pressure value between the first interface of the pressure reducing relief valve 20 and the third interface of the pressure reducing relief valve 20 is set between the set pressure value between the second interface of the pressure reducing relief valve 20 and the first interface of the pressure reducing relief valve 20 and the total relief valve pressure value of the hydraulic system circuit.

[0046] The technical purpose is to improve the reliability of the pressure reducing relief valve 20.

[0047] In this embodiment, the balancing valve 10 and the pressure reducing relief valve 20 are arranged to be distributed in a variable flow delivery manner.

[0048] The method of using this embodiment is as follows: when the multi-stage oil cylinder of the working bucket of the insulated boom truck is hydraulically controlled, the second interface of the pressure reducing relief valve 20 is connected to the oil inlet, and the high-pressure liquid is injected into the multi-stage oil cylinder of the working bucket of the insulated boom truck through the second interface of the pressure reducing relief valve 20 and the first interface of the pressure reducing relief valve 20, so that the first-stage piston rod is extended. When the first-stage piston rod is completely extended, the high-pressure liquid pushes the second-stage piston rod again. Since the area of ​​the second-stage piston rod becomes smaller, the pressure of the hydraulic system circuit increases. Under the action of the spring between the second interface of the pressure reducing relief valve 20 and the first interface of the pressure reducing relief valve 20, the opening of the first interface of the pressure reducing relief valve 20 becomes smaller, and the flow rate of the high-pressure liquid injected into the second-stage piston rod is reduced, so that the extension speed of the second-stage piston rod is reduced, and the extension speed of the second-stage piston rod is kept the same as the extension speed of the first-stage piston rod.

[0049] When the multi-stage oil cylinder of the working bucket of the insulated boom truck is extended, the high-pressure liquid in the multi-stage oil cylinder of the working bucket of the insulated boom truck is refluxed through the interface V1 of the balancing valve 10, and the oil is also unloaded through the first interface of the pressure reducing relief valve 20 and the third interface of the pressure reducing relief valve 20.

[0050] When verifying the utility model, the inventor abandoned the existing technical features of using a balancing valve and having a sudden jump in speed when extending at different stages. First, a technical feature was proposed to make the multi-stage cylinder of the working bucket of the insulated boom truck be in a state of uniform speed extension, and the first unexpected technical effect was obtained: the integrated setting of the pressure reducing interface and the pressure relief interface was realized, and the second unexpected technical effect was obtained: the flow injection was reduced in the hydraulic system circuit of the multi-stage cylinder of the working bucket of the insulated boom truck, and the multi-stage cylinder of the working bucket of the insulated boom truck was in a uniform speed extension state, and the third unexpected technical effect was obtained: the increase of oil return from the oil unloading interface in the hydraulic system circuit of the multi-stage cylinder of the working bucket of the insulated boom truck was realized, and the other hydraulic components of the hydraulic system circuit were in a safe state, and the fourth unexpected technical effect was obtained: the friendly coordination relationship between the injection variable and the discharge variable of the balancing valve 10 and the hydraulic cavity of the multi-stage cylinder of the working bucket of the insulated boom truck was improved, and the reliability of the use of the balancing valve 10 was improved.

[0051] In the second embodiment of the utility model, the balancing valve 10 and the pressure reducing relief valve 20 are connected to each other in such a way that the multi-stage oil cylinder of the working bucket of the insulated boom truck is in a uniform speed extending state.

[0052] In this embodiment, the pressure reducing relief valve 20 is connected to the balancing valve 10 in a manner to inject variable high-pressure liquid.

[0053] In this embodiment, the pressure reducing relief valve 20 is further provided with a third interface.

[0054] The second embodiment of the present utility model is based on the first embodiment.

[0055] The utility model has the following characteristics:

[0056] 1. Due to the design of the balancing valve 10 and the pressure reducing relief valve 20, the balancing valve 10 is used to realize hydraulic control of the multi-stage oil cylinder of the working bucket of the insulated boom truck, and the pressure reducing relief valve 20 is used to inject variable high-pressure liquid into the balancing valve 10, so that the multi-stage oil cylinder of the working bucket of the insulated boom truck is in a uniformly extended state, which solves the technical problem that the balancing valve is used and there will be a sudden jump in speed when extending at different stages, thereby improving the safety performance of the operator in the working bucket.

[0057] 2. Due to the design of the pressure reducing relief valve 20, rapid pressure relief of the hydraulic system circuit is achieved.

[0058] 3. Due to the design of the pressure reducing relief valve 20, the limited supply of high-pressure liquid to the balancing valve 10 is achieved.

[0059] 4. Since the design limits the numerical range of the structural shape, the numerical range is the technical feature in the technical solution of the utility model, and is not a technical feature calculated by formula or obtained through a limited number of tests. Tests have shown that the technical features of this numerical range have achieved good technical effects.

[0060] 5. Due to the design of the technical features of the utility model, the effects of the individual and combined technical features have been shown through experiments to have various performance indicators of the utility model that are at least 1.7 times the existing performance indicators, and the evaluation shows that the utility model has a good market value.

[0061] There are other technical features connected with the balancing valve 10 and the pressure reducing relief valve 20 that make the multi-stage cylinder of the working bucket of the insulated boom truck extend at a uniform speed, which are all embodiments of the present utility model, and the technical features of the above-mentioned embodiments can be combined arbitrarily. In order to meet the requirements of the Patent Law, Patent Implementation Rules and Examination Guidelines, all possible combinations of the technical features in the above-mentioned embodiments will no longer be described.

[0062] Therefore, in the technical field of hydraulic devices for the multi-stage cylinder of the working bucket of an insulated boom truck, all technical contents including the balancing valve 10 arranged on the multi-stage cylinder of the working bucket of the insulated boom truck and the pressure reducing overflow valve 20 arranged on the balancing valve 10 and having a second interface and a first interface are within the protection scope of the present utility model.

Claims

1. A hydraulic device for a multi-stage oil cylinder of an insulated bucket truck, characterized by: The invention comprises a balancing valve (10) arranged on a multi-stage oil cylinder of a working bucket of an insulating bucket truck, and a pressure reducing relief valve (20) arranged on the balancing valve (10) and having a second interface and a first interface.

2. The hydraulic device for the multi-stage oil cylinder of the working bucket of the insulated boom truck according to claim 1 is characterized in that: The balance valve (10) and the pressure reducing relief valve (20) are connected to each other in such a way that the multi-stage oil cylinder of the working bucket of the insulating boom truck is in a state of extending at a uniform speed.

3. The hydraulic device for the multi-stage oil cylinder of the working bucket of the insulated boom truck according to claim 2 is characterized in that: The pressure reducing relief valve (20) is connected to the balancing valve (10) in a manner to inject variable high-pressure liquid.

4. The hydraulic device for the multi-stage oil cylinder of the working bucket of the insulated boom truck according to claim 1 is characterized in that: The pressure reducing relief valve (20) is also provided with a third interface.

5. The hydraulic device for the multi-stage oil cylinder of the working bucket of the insulated boom truck according to claim 4 is characterized in that: A pressure reducing relief valve (20) is provided on the balancing valve (10).

6. The hydraulic device for the multi-stage oil cylinder of the working bucket of the insulated boom truck according to claim 5 is characterized in that: The balancing valve (10) is provided with an interface V1, an interface V2, an interface C1 and an interface C2, and the interface V2 of the balancing valve (10) is arranged to be connected in a communication manner with the pressure reducing relief valve (20), the interface V1 of the balancing valve (10) is arranged to be connected in a communication manner with the oil return port, and the interface C1 of the balancing valve (10) and the interface C2 of the balancing valve (10) are respectively arranged to be connected to the hydraulic port portion of the multi-stage oil cylinder of the working bucket of the insulated boom truck.

7. The hydraulic device for the multi-stage oil cylinder of the working bucket of the insulated boom truck according to claim 5 is characterized in that: The second interface of the pressure reducing relief valve (20) is arranged to be connected in a communication manner with the oil inlet, the first interface of the pressure reducing relief valve (20) is arranged to be connected in a communication manner with the balance valve (10), and the third interface of the pressure reducing relief valve (20) is arranged to be connected in a communication manner with the oil discharge port.

8. The hydraulic device for the multi-stage oil cylinder of the working bucket of the insulated boom truck according to claim 5 is characterized in that: The second interface of the pressure reducing relief valve (20) and the first interface of the pressure reducing relief valve (20) are arranged to be distributed in the manner of a pressure reducing valve. Alternatively, the first interface of the pressure reducing relief valve (20) and the third interface of the pressure reducing relief valve (20) are arranged to be distributed in the manner of a relief valve.

9. The hydraulic device for the multi-stage oil cylinder of the working bucket of the insulated boom truck according to claim 5 is characterized in that: The set pressure value between the first interface of the pressure reducing relief valve (20) and the third interface of the pressure reducing relief valve (20) is set between the set pressure value between the second interface of the pressure reducing relief valve (20) and the first interface of the pressure reducing relief valve (20) and the total relief valve pressure value of the hydraulic system circuit.

10. The hydraulic device for the multi-stage oil cylinder of the working bucket of the insulated boom truck according to any one of claims 1 to 9, characterized in that: The balancing valve (10) and the pressure reducing relief valve (20) are arranged to be distributed in a variable flow delivery manner.

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