Hydraulic device for insulated boom truck

Abstract

A hydraulic device for an insulated boom truck comprises a first reversing control valve (2) used as a lower truck main valve body, a second reversing control valve (4) used as an upper truck main valve body, and a second flow control valve (3) arranged between the first reversing control valve (2) and the second reversing control valve (4). Through a first flow control valve (3), control over getting-on and getting-off actions of the insulated boom truck is achieved, through a second flow control valve (3), secondary high-pressure liquid flow limiting control over a second reversing control valve (4) is achieved, and the reversing control valves are in a liquid variable flow mutual communication state; the technical problem that the upper main valve and the lower main valve are independent individuals is solved, and therefore the control efficiency of the hydraulic device of the insulated boom truck is improved.

Description

Technical Field

[0001] The utility model relates to a hydraulic device, in particular to a hydraulic device used for an insulating bucket arm vehicle. Background Art

[0002] The insulated boom truck is a special vehicle for performing intermediate potential operations in places with convenient transportation and complex wiring. In order to keep the dismounting and working bucket with a turntable, an insulating arm and a telescopic arm in working condition, the hydraulic device used for the insulated boom truck is an important insulated boom truck device. In the existing insulated boom trucks, the main valve on the vehicle and the main valve on the dismounting are independent individuals. The dismounting of the insulated boom truck mainly controls large movements such as the turntable, the insulating arm, and the telescopic arm, so that the vehicle can quickly bring the person on the working bucket to the working position. Therefore, the dismounting valve has a large flow, a large speed, a large workload, and a large pressure. The on-vehicle mainly controls the fine and small movements of the working bucket, so that the person on the working bucket can adjust to the best working position during work. Therefore, the on-vehicle valve has a small flow, a slow speed, a small workload, and a small pressure. Since there is no liquid flow interconnected between the on-vehicle main valve and the off-vehicle main valve, the operating efficiency of the hydraulic device of the insulated boom truck is affected.

[0003] The utility model makes the reversing control valve in a state of interconnected liquid variable flow by the technical feature, and effectively explores and studies the technical problem that the main valve for the upper vehicle and the main valve for the lower vehicle are independent of each other at the technical level. Summary of the invention

[0004] The object of the utility model is a hydraulic device used for an insulating bucket arm truck.

[0005] In order to overcome the above technical shortcomings, the purpose of the utility model is to provide a hydraulic device for an insulated boom truck, thereby improving the operating efficiency of the hydraulic device of the insulated boom truck.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: it includes a first reversing control valve used as a main valve body for getting off the vehicle, a second reversing control valve used as a main valve body for getting on the vehicle, and a second flow control valve arranged between the first reversing control valve and the second reversing control valve.

[0007] Due to the design of the first reversing control valve, the second reversing control valve and the second flow control valve, the getting on and off actions of the insulated boom truck are controlled through the first reversing control valve and the second reversing control valve, and the high-pressure liquid flow limiting control of the second reversing control valve is realized through the second flow control valve, so that the reversing control valves are in a state of interconnection of liquid variable flows, which solves the technical problem that the main valve for getting on the truck and the main valve for getting off the truck are independent individuals, thereby improving the operating efficiency of the hydraulic device of the insulated boom truck.

[0008] The utility model is designed to connect the first reversing control valve, the second reversing control valve and the second flow control valve to each other in a manner that the reversing control valves are in a state of being interconnected with each other in terms of liquid variable flow.

[0009] The utility model is designed to connect the second flow control valve with the first reversing control valve and the second reversing control valve in a way of secondary high-pressure liquid flow limiting control.

[0010] The technical effect of the above technical solution is: highlighting the technical feature of making the reversing control valve in a state of interconnected liquid variable flow, and introducing its application in the technical field of hydraulic devices for insulated boom trucks.

[0011] The utility model is designed to further include a first accessory device, and the first accessory device is arranged on a first reversing control valve, and the first accessory device is arranged as a first flow control valve.

[0012] 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.

[0013] The utility model is designed that a first flow control valve and a second flow control valve are arranged on a first reversing control valve, and a second reversing control valve is arranged between the second flow control valve and the first flow control valve.

[0014] The technical effect of the above technical solution is that the first flow control valve, the first reversing control valve, the second flow control valve and the second reversing control valve constitute the basic technical solution of the utility model and solve the technical problem of the utility model.

[0015] The utility model is designed that an oil inlet interface IP, an oil outlet interface IT and a control oil interface ILS are respectively arranged on a first flow control valve, and the oil inlet interface IP of the first flow control valve is respectively arranged to be connected in a communicating manner with an external high-pressure liquid output interface and a first reversing control valve, the oil outlet interface IT of the first flow control valve is respectively arranged to be connected in a communicating manner with an external high-pressure liquid return oil interface, the first reversing control valve, the second flow control valve and the second reversing control valve, and the control oil interface ILS of the first flow control valve is arranged to be connected in a communicating manner with the second reversing control valve.

[0016] The technical effect of the above technical solution is: realizing flow control of the first reversing control valve and realizing flow feedback of the second reversing control valve.

[0017] The utility model is designed that an oil inlet interface IIP, an oil outlet interface IIT, an output interface IA and an output interface IIB are respectively arranged on a first reversing control valve, and the oil inlet interface IIP of the first reversing control valve is respectively arranged to be connected in a communicating manner with a first flow control valve and a second flow control valve, the oil outlet interface IIT of the first reversing control valve is respectively arranged to be connected in a communicating manner with the first flow control valve, the second flow control valve and the second reversing control valve, and the output interface IA of the first reversing control valve and the output interface IIB of the first reversing control valve are respectively arranged to be connected in a communicating manner with a hydraulic port portion of a turntable, a hydraulic port portion of an insulating arm and a hydraulic port portion of a telescopic arm.

[0018] The technical effect of the above technical solution is that the operation control of getting off the vehicle is realized.

[0019] The utility model is designed that an oil inlet interface IIIP and an oil outlet interface IIIT are respectively arranged on the second flow control valve, and the oil inlet interface IIIP of the second flow control valve is respectively arranged to be connected in a communicating manner with the first flow control valve, the first reversing control valve and the second reversing control valve, and the oil outlet interface IIIT of the second flow control valve is respectively arranged to be connected in a communicating manner with the first flow control valve, the first reversing control valve and the second reversing control valve.

[0020] The technical effect of the above technical solution is that it realizes flow control of the second reversing control valve in a series state with the first flow control valve and the second flow control valve.

[0021] The utility model is designed that an oil inlet interface IVP, an oil outlet interface IVT, an output interface IIIA, an output interface IVB and a control oil interface IILS are respectively arranged on a second reversing control valve, and the oil inlet interface IVP of the second reversing control valve is arranged to be connected in a communicating manner with the second flow control valve, the oil outlet interface IVT of the second reversing control valve is arranged to be connected in a communicating manner with the first flow control valve, the first reversing control valve and the second flow control valve, and the output interface IIIA of the second reversing control valve and the output interface IVB of the second reversing control valve are arranged to be connected in a communicating manner with a hydraulic port portion of a control working bucket action component, and the control oil interface IILS of the second reversing control valve is arranged to be connected in a communicating manner with the first flow control valve.

[0022] The technical effect of the above technical solution is that the operation control of the working bucket movement is realized.

[0023] The utility model is designed that the first flow control valve and the first reversing control valve are distributed with the second flow control valve and the second reversing control valve in a manner of being connected with a rear valve body.

[0024] The utility model is designed that the oil outlet interface IT of the first flow control valve, the oil outlet interface ⅡT of the first reversing control valve, the oil outlet interface ⅢT of the second flow control valve and the oil outlet interface ⅣVT of the second reversing control valve are arranged to be connected to each other in parallel, and the oil inlet interface IP of the first flow control valve, the oil inlet interface ⅡP of the first reversing control valve, the oil inlet interface ⅢP of the second flow control valve and the oil inlet interface ⅣVP of the second reversing control valve are arranged to be connected to each other in series.

[0025] In the technical solution, the second flow control valve is used to realize the liquid variable flow interconnection state of the reversing control valve.

[0026] In the present technical solution, the first reversing control valve, the second reversing control valve and the second flow control valve that make the reversing control valve in a state of liquid variable flow interconnection are important technical features. In the technical field of hydraulic devices for insulated boom trucks, it has novelty, creativity and practicality. The terms in the present technical solution can be explained and understood using patent documents in this technical field. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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.

[0028] Figure 1 It is a schematic diagram of the utility model.

[0029] The first flow control valve-1, the first switching control valve-2, the second flow control valve-3, and the second switching control valve-4. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] Figure 1 This is the first embodiment of the utility model, which is specifically described in conjunction with the accompanying drawings. It includes a first flow control valve 1, a first reversing control valve 2, a second flow control valve 3 and a second reversing control valve 4, and the first flow control valve 1 and the second flow control valve 3 are arranged on the first reversing control valve 2, and the second reversing control valve 4 is arranged between the second flow control valve 3 and the first flow control valve 1.

[0036] In this embodiment, an oil inlet interface IP, an oil outlet interface IT and a control oil interface ILS are respectively provided on the first flow control valve 1, and the oil inlet interface IP of the first flow control valve 1 is respectively arranged to be connected in a communicating manner with an external high-pressure liquid output interface and the first reversing control valve 2, the oil outlet interface IT of the first flow control valve 1 is respectively arranged to be connected in a communicating manner with an external high-pressure liquid return oil interface, the first reversing control valve 2, the second flow control valve 3 and the second reversing control valve 4, and the control oil interface ILS of the first flow control valve 1 is arranged to be connected in a communicating manner with the second reversing control valve 4.

[0037] Through the first flow control valve 1, a supporting connection point for the first reversing control valve 2, the second flow control valve 3 and the second reversing control valve 4 is formed. The first flow control valve 1 realizes the connection with the first reversing control valve 2, the connection with the second flow control valve 3, and the connection with the second reversing control valve 4. Its technical purpose is to serve as a component for performing first-level flow control on an external high-pressure liquid output interface.

[0038] In this embodiment, an oil inlet interface IIP, an oil outlet interface IIT, an output interface IA and an output interface IIB are respectively provided on the first reversing control valve 2, and the oil inlet interface IIP of the first reversing control valve 2 is respectively arranged to be connected in a communicating manner with the first flow control valve 1 and the second flow control valve 3, the oil outlet interface IIT of the first reversing control valve 2 is respectively arranged to be connected in a communicating manner with the first flow control valve 1, the second flow control valve 3 and the second reversing control valve 4, and the output interface IA of the first reversing control valve 2 and the output interface IIB of the first reversing control valve 2 are respectively arranged to be connected in a communicating manner with the hydraulic port portion of the turntable, the hydraulic port portion of the insulating arm and the hydraulic port portion of the telescopic arm.

[0039] Through the first reversing control valve 2, a supporting connection point for the first flow control valve 1, the second flow control valve 3 and the second reversing control valve 4 is formed. The first reversing control valve 2 realizes the connection with the first flow control valve 1, the connection with the second flow control valve 3, and the connection with the second reversing control valve 4. Its technical purpose is to be used as a component of the main valve body of the vehicle.

[0040] In this embodiment, an oil inlet interface IIIP and an oil outlet interface IIIT are respectively provided on the second flow control valve 3, and the oil inlet interface IIIP of the second flow control valve 3 is respectively arranged to be connected in a communicating manner with the first flow control valve 1, the first reversing control valve 2 and the second reversing control valve 4, and the oil outlet interface IIIT of the second flow control valve 3 is respectively arranged to be connected in a communicating manner with the first flow control valve 1, the first reversing control valve 2 and the second reversing control valve 4.

[0041] Through the second flow control valve 3, a supporting connection point for the first flow control valve 1, the first reversing control valve 2 and the second reversing control valve 4 is formed. The second flow control valve 3 realizes the connection with the first flow control valve 1, the connection with the first reversing control valve 2, and the connection with the second reversing control valve 4. Its technical purpose is to serve as a component for performing second-level flow control on an external high-pressure liquid output interface.

[0042] In this embodiment, the second reversing control valve 4 is respectively provided with an oil inlet interface IVP, an oil outlet interface IVT, an output interface IIIA, an output interface IVB and a control oil interface IILS, and the oil inlet interface IVP of the second reversing control valve 4 is arranged to be connected in a communicating manner with the second flow control valve 3, the oil outlet interface IVT of the second reversing control valve 4 is arranged to be connected in a communicating manner with the first flow control valve 1, the first reversing control valve 2 and the second flow control valve 3, and the output interface IIIA of the second reversing control valve 4 and the output interface IVB of the second reversing control valve 4 are respectively arranged to be connected in a communicating manner with the hydraulic port portion of the control working bucket action component, and the control oil interface IILS of the second reversing control valve 4 is arranged to be connected in a communicating manner with the first flow control valve 1.

[0043] Through the second reversing control valve 4, a supporting connection point for the first flow control valve 1 and the second flow control valve 3 is formed. The second reversing control valve 4 realizes the connection with the first flow control valve 1, the connection with the first reversing control valve 2, and the connection with the second flow control valve 3. Its technical purpose is to be used as a component of the main valve body of the vehicle.

[0044] In this embodiment, the first flow control valve 1 and the first reversing control valve 2 are arranged to be distributed in a manner of rear valve body connection with the second flow control valve 3 and the second reversing control valve 4, the oil outlet interface IT of the first flow control valve 1, the oil outlet interface IIT of the first reversing control valve 2, the oil outlet interface IIIT of the second flow control valve 3 and the oil outlet interface IVT of the second reversing control valve 4 are arranged to be connected to each other in parallel, and the oil inlet interface IP of the first flow control valve 1, the oil inlet interface IIP of the first reversing control valve 2, the oil inlet interface IIIP of the second flow control valve 3 and the oil inlet interface IVP of the second reversing control valve 4 are arranged to be connected to each other in series in sequence.

[0045] The method of using this embodiment is as follows: when the insulated boom truck is disembarked and the working bucket is operated, the oil inlet interface IP of the first flow control valve 1 is connected to the external high-pressure liquid output interface, and the control oil interface ILS of the first flow control valve 1 is disconnected from the control oil interface IILS of the second reversing control valve 4. The oil inlet interface IP of the first flow control valve 1, the oil inlet interface IIP of the first reversing control valve 2, the oil outlet interface IIT of the first reversing control valve 2 and the oil outlet interface IT of the first flow control valve 1 constitute a hydraulic circuit, so that the first reversing control valve 2 is in a working state, and the disembarking operation is realized. When the control oil interface ILS of the first flow control valve 1 is connected to the control oil interface IILS of the second reversing control valve 4, the oil outlet interface IIT of the first flow control valve 1 is connected to the control oil interface ILS of the second reversing control valve 4. The control oil interface ⅡLS is in a connected state, the oil inlet interface IP of the first flow control valve 1, the oil inlet interface ⅡP of the first reversing control valve 2, the oil inlet interface ⅢP of the second flow control valve 3 and the oil inlet interface IVP of the second reversing control valve 4, the oil outlet interface IVT of the second reversing control valve 4, the oil outlet interface ⅢT of the second flow control valve 3, the oil outlet interface ⅡT of the first reversing control valve 2 and the oil outlet interface IT of the first flow control valve 1 constitute a hydraulic circuit, so that the second reversing control valve 4 is in a working state, and the working bucket operation is realized. When the insulated boom truck is dismounted and the working bucket operation is completed, the oil inlet interface IP of the first flow control valve 1 is disconnected from the external high-pressure liquid output interface.

[0046] When verifying the utility model, the inventor abandoned the existing technical features that the main valve for getting on the vehicle and the main valve for getting off the vehicle are independent entities, and first proposed a technical feature that makes the reversing control valve in a state of liquid variable flow interconnected, and obtained the first unexpected technical effect: the first flow control valve 1 is operated under a large flow, high speed, large workload and high pressure state, and the second reversing control valve 4 is operated under a small flow, low speed, small workload and low pressure state, and obtained the second unexpected technical effect: the first flow control valve 1 is installed in front and the second flow control valve 3 is installed in the back, and obtained the third unexpected technical effect: the second reversing control valve 4 and the first flow control valve 1 are in real-time adjustment of flow feedback.

[0047] In the second embodiment of the utility model, the first switching control valve 2, the second switching control valve 4 and the second flow control valve 3 are connected to each other in such a way that the switching control valves are in a state of interconnection of liquid variable flow.

[0048] In this embodiment, the second flow control valve 3 is connected to the first switching control valve 2 and the second switching control valve 4 in a manner of secondary high-pressure liquid flow limiting control.

[0049] In this embodiment, a first accessory device is further included and is arranged on the first reversing control valve 2 . The first accessory device is arranged as a first flow control valve 1 .

[0050] The second embodiment of the present utility model is based on the first embodiment.

[0051] The utility model has the following characteristics:

[0052] 1. Due to the design of the first reversing control valve 2, the second reversing control valve 4 and the second flow control valve 3, the first reversing control valve 2 and the second reversing control valve 4 are used to control the getting on and off actions of the insulated boom truck. The second flow control valve 3 is used to control the high-pressure liquid flow rate of the second reversing control valve 4 again, so that the reversing control valves are in a state of interconnection of liquid variable flow rates, which solves the technical problem that the main valve for getting on the truck and the main valve for getting off the truck are independent individuals, thereby improving the operating efficiency of the hydraulic device of the insulated boom truck.

[0053] 2. Due to the design of the first flow control valve 1, the high-pressure liquid flow control of the first reversing control valve 2 is achieved.

[0054] 3. Due to the design of the first flow control valve 1, flow feedback communication with the second reversing control valve 4 is achieved.

[0055] 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.

[0056] 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.

[0057] There are other technical features that connect the first reversing control valve 2, the second reversing control valve 4 and the second flow control valve 3 so that the reversing control valve is in a state of liquid variable flow interconnection, 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.

[0058] Therefore, in the technical field of hydraulic devices for insulated boom trucks, all technical contents including a first reversing control valve 2 used as the main valve body for getting off the vehicle, a second reversing control valve 4 used as the main valve body for getting on the vehicle, and a second flow control valve 3 arranged between the first reversing control valve 2 and the second reversing control valve 4 are within the protection scope of the present utility model.

Claims

1. A hydraulic device for an insulated boom truck, characterized in that: The invention comprises a first reversing control valve (2) used as a main valve body for getting off the vehicle, a second reversing control valve (4) used as a main valve body for getting on the vehicle, and a second flow control valve (3) arranged between the first reversing control valve (2) and the second reversing control valve (4).

2. The hydraulic device for an insulated boom truck according to claim 1, characterized in that: The first switching control valve (2), the second switching control valve (4) and the second flow control valve (3) are connected to each other in such a way that the switching control valves are in a state of interconnection of liquid variable flow rates.

3. The hydraulic device for an insulated boom truck according to claim 2, characterized in that: The second flow control valve (3) is connected to the first reversing control valve (2) and the second reversing control valve (4) in a manner of re-limiting the high-pressure liquid flow rate.

4. The hydraulic device for an insulated boom truck according to claim 1, characterized in that: It also includes a first accessory device and the first accessory device is arranged on a first reversing control valve (2). The first accessory device is arranged as a first flow control valve (1).

5. The hydraulic device for an insulated boom truck according to claim 4, characterized in that: A first flow control valve (1) and a second flow control valve (3) are arranged on the first reversing control valve (2), and a second reversing control valve (4) is arranged between the second flow control valve (3) and the first flow control valve (1).

6. The hydraulic device for an insulated boom truck according to claim 5, characterized in that: An oil inlet interface IP, an oil outlet interface IT and a control oil interface ILS are respectively provided on the first flow control valve (1), and the oil inlet interface IP of the first flow control valve (1) is respectively arranged to be connected in a communication manner with an external high-pressure liquid output interface and a first reversing control valve (2), the oil outlet interface IT of the first flow control valve (1) is respectively arranged to be connected in a communication manner with an external high-pressure liquid return interface, a first reversing control valve (2), a second flow control valve (3) and a second reversing control valve (4), and the control oil interface ILS of the first flow control valve (1) is arranged to be connected in a communication manner with the second reversing control valve (4).

7. The hydraulic device for an insulated boom truck according to claim 5, characterized in that: An oil inlet interface IIP, an oil outlet interface IIT, an output interface IA and an output interface IIB are respectively arranged on the first reversing control valve (2); and the oil inlet interface IIP of the first reversing control valve (2) is respectively arranged to be connected in a communication manner with the first flow control valve (1) and the second flow control valve (3); the oil outlet interface IIT of the first reversing control valve (2) is respectively arranged to be connected in a communication manner with the first flow control valve (1), the second flow control valve (3) and the second reversing control valve (4); and the output interface IA of the first reversing control valve (2) and the output interface IIB of the first reversing control valve (2) are respectively arranged to be connected in a communication manner with the hydraulic port portion of the turntable, the hydraulic port portion of the insulating arm and the hydraulic port portion of the telescopic arm.

8. The hydraulic device for an insulated boom truck according to claim 5, characterized in that: The second flow control valve (3) is provided with an oil inlet interface IIIP and an oil outlet interface IIIT, and the oil inlet interface IIIP of the second flow control valve (3) is respectively arranged to be connected in a communication manner with the first flow control valve (1), the first reversing control valve (2) and the second reversing control valve (4), and the oil outlet interface IIIT of the second flow control valve (3) is respectively arranged to be connected in a communication manner with the first flow control valve (1), the first reversing control valve (2) and the second reversing control valve (4).

9. The hydraulic device for an insulated boom truck according to claim 5, characterized in that: The second reversing control valve (4) is provided with an oil inlet interface IVP, an oil outlet interface IVT, an output interface IIIA, an output interface IVB and a control oil interface IILS, and the oil inlet interface IVP of the second reversing control valve (4) is arranged to be connected in a communication manner with the second flow control valve (3), the oil outlet interface IVT of the second reversing control valve (4) is arranged to be connected in a communication manner with the first flow control valve (1), the first reversing control valve (2) and the second flow control valve (3), and the output interface IIIA of the second reversing control valve (4) and the output interface IVB of the second reversing control valve (4) are arranged to be connected in a communication manner with the hydraulic port portion of the control working bucket action component, and the control oil interface IILS of the second reversing control valve (4) is arranged to be connected in a communication manner with the first flow control valve (1).

10. The hydraulic device for an insulated boom truck according to any one of claims 1 to 9, characterized in that: The first flow control valve (1) and the first switching control valve (2) are arranged to be distributed with the second flow control valve (3) and the second switching control valve (4) in a manner of connecting the rear valve bodies. Alternatively, the oil outlet interface IT of the first flow control valve (1), the oil outlet interface II of the first reversing control valve (2), the oil outlet interface IIIT of the second flow control valve (3) and the oil outlet interface IV of the second reversing control valve (4) are arranged to be connected to each other in parallel, and the oil inlet interface IP of the first flow control valve (1), the oil inlet interface II of the first reversing control valve (2), the oil inlet interface IIIP of the second flow control valve (3) and the oil inlet interface IVP of the second reversing control valve (4) are arranged to be connected to each other in series.

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