Hydraulic device for externally connecting hydraulic tool

Abstract

A hydraulic device used for being externally connected with a hydraulic tool comprises a hydraulic device body formed by connecting an overflow valve, a ball valve, a pressure measuring connector, an oil path block and related oil channels, the hydraulic device body is placed between an oil outlet of a main pump and an oil inlet of a working oil path, the ball valve is controlled to control a hydraulic system to be started in an unloading state, and impact of loads on the system during starting is avoided. The overflow valve serves as a safety valve, is directly connected to a main pump outlet and is used for protecting the safety of a working oil way. The device is small in size, good in portability and convenient to disassemble and assemble, normal work of a working oil way is not affected by selection or assembly, and the device can be widely applied to engineering machinery, in particular to the field of track engineering machinery.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic pressure, in particular to a hydraulic device used for externally connected hydraulic tools. Background Art

[0002] In construction machinery, external hydraulic tools are required for operation. During the construction process using hydraulic tools, a pressure control device needs to be installed between the hydraulic oil source and the hydraulic tool to control the operation of the hydraulic tool. Traditional hydraulic devices are composed of multiple hydraulic pipelines connected with control valves. Not only are the pipelines numerous and complex, and the assembly time is long, but different control valves need to be installed with separately designed mounting seats, which takes up a large space and is not beautiful overall. The pipelines and valve groups are not integrated, which makes installation inconvenient and has poor portability. Summary of the invention

[0003] The problem solved by the utility model is to provide a hydraulic device for external hydraulic tools, which controls the maximum system pressure of the external hydraulic tools through the overflow valve to ensure that the hydraulic tools can work normally and stably, and the valve group A and B ports are externally connected with quick connectors, which can facilitate the frequent disassembly of the external hydraulic tools. The ball valve of the valve group can close the ball valve in the initial state, control the hydraulic system to start in the unloading state, avoid the impact of the load on the system during startup, and open the ball valve when it runs stably, and the oil pump oil flows to the hydraulic tool to make it work.

[0004] The technical scheme of the utility model is: a hydraulic device for an external hydraulic tool, comprising an integrated oil passage block composed of an overflow valve, a ball valve and an oil passage block; an oil passage is arranged in the oil passage block, the oil passage comprises an oil passage a and an oil passage d, the two oil passage ports of the oil passage a are respectively a P oil port and an A oil port, the two oil passage ports of the oil passage d are respectively a T oil port and a B oil port; the oil passage also comprises an oil passage b for connecting the P oil port to the T oil port, a ball valve is arranged on the oil passage b; the oil passage also comprises an oil passage c intersecting with the oil passages a and d, the overflow valve is connected in series to the oil passage c, and the overflow port of the overflow valve is communicated with the T oil port.

[0005] A pressure measuring oil passage is arranged near the P oil port in the oil passage a. The oil passage opening of the pressure measuring oil passage is the MP oil port on the surface of the oil block. A pressure measuring joint is installed at the MP oil port.

[0006] The relief valve is a spring-controlled direct-acting relief valve. The relief valve is connected in series on the oil passage c and in parallel with the ball valve connected in series on the oil passage b. The oil passages b and c intersect with the oil passages a and d.

[0007] The oil passage b is connected in series with a two-way solenoid valve or a ball valve for controlling the on-off of the oil passage, and the ball valve has the function of manually controlling the on-off of the oil passage.

[0008] Oil passage a intersects with oil passage b near the P oil port, oil passage d communicates with the T oil port and the B oil port, and oil passage d intersects with oil passage b and oil passage c.

[0009] A hydraulic device for an external hydraulic tool comprises an oil passage a and an oil passage d, wherein the two oil passage ports of the oil passage a are respectively a P oil port and an A oil port, and the two oil passage ports of the oil passage d are respectively a T oil port and a B oil port; further comprising an oil passage b for connecting the P oil port to the T oil port, and the oil passage b is provided with a ball valve; further comprising an oil passage c intersecting with the oil passage a and the oil passage d, and an overflow valve is serially connected to the oil passage c, and the overflow port of the overflow valve is communicated with the T oil port.

[0010] The utility model is a hydraulic valve group for external hydraulic tools with a circuit protection function. The ball valve and the relief valve are connected through relevant oil channels to form a hydraulic device, forming a small module, which is placed between the main pump outlet and the working oil circuit inlet for installation. In the utility model, the relief valve is used as a safety valve, which is directly connected to the main pump outlet to protect the safety of the working oil circuit. The working oil circuit refers to the hydraulic tool oil inlet channel a, the hydraulic tool oil outlet channel b, and the circulating oil circuit composed of the hydraulic tool. The ball valve has a manual operation function, which is convenient for starting the oil pump in an unloaded state and for emergency and troubleshooting. The utility model is small in size, good in portability, and easy to disassemble and assemble. Whether it is installed or not does not affect the normal operation of the main working oil circuit. The pressure of the relief valve is adjustable, and it can be widely used in engineering machinery, especially in the field of rail engineering machinery. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is the hydraulic principle diagram of the utility model;

[0012] Figure 2 It is a three-dimensional structural diagram of an embodiment of the utility model in the form of a valve group;

[0013] Figure 3 yes Figure 2 A-direction view.

[0014] In the figure: overflow valve 1, ball valve 2, pressure measuring joint 3, oil circuit block 4. DETAILED DESCRIPTION

[0015] The present invention is further described in detail below in conjunction with the accompanying drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0016] like Figure 1 The hydraulic principle shown in the figure, the utility model includes a hydraulic device composed of a relief valve 1, a ball valve 2, a pressure measuring joint 3, an oil circuit block 4 and related oil passages. The hydraulic device can also be designed as a valve group, the relief valve 1, the ball valve 2, the pressure measuring joint 3, and the related oil passages are integrated on the oil circuit block 4 to form a hydraulic valve group, as shown in the attached Figure 2As shown. The two oil passages of oil passage a are oil passage P and oil passage A respectively. A ball valve is provided on oil passage b. Oil passage a intersects with oil passage b near oil passage P. The overflow valve is connected in series to oil passage c. The oil passage after overflow is connected with oil passage T. Oil passage d is connected with oil passage T and oil passage B, and intersects with oil passage b and oil passage c.

[0017] The ball valve has a manual operation function; the oil circuit can be controlled on and off by the handle.

[0018] Figure 2 , 3 In the figure, the relief valve 1, ball valve 2, and pressure measuring joint 3 are cross-mounted on the upper surface of the oil block 4. The left vertical surface of the oil block 4 is provided with oil port P and oil port T. At the same time, a pressure measuring interface MP is provided on the front vertical surface of the oil block 4 to install the pressure measuring joint 3, and a pressure oil port and a return oil port for external hydraulic tools are provided.

[0019] In practical applications, such as Figure 1 The P oil port is connected to the main pump oil outlet, and then connected to the A oil port through the oil channel a. The external hydraulic tool is connected by using a quick connector to supply oil to the external hydraulic tool. The external hydraulic tool is connected to the B oil port through the quick connector, and then directly connected to the hydraulic oil tank after connecting to the T oil port through the oil channel d. The overflow valve 1 is set to a higher value to control the upper limit of the pressure value of the system oil circuit; the ball valve 2 is normally open to control the on-off of the oil channel b. When the ball valve 2 is closed, the oil channel from the P oil port to the T oil port is directly connected, and the oil from the main pump returns directly to the oil tank. The overflow valve 1 acts as a safety valve to protect the working oil circuit; if the external hydraulic tool fails and the oil circuit is different, you can try to manually close the ball valve 2 to perform on-off operation to troubleshoot the fault and test run to ensure the safe and reliable use of the hydraulic system.

[0020] The above description in conjunction with the drawings is only a description of a specific implementation of the utility model, and does not limit the technical solution of the present invention to this. All equivalent changes in hydraulic principles and appearance modifications made according to the spirit of the utility model should fall within the protection scope of the utility model.

Claims

1. A hydraulic device for an external hydraulic tool, characterized in that: The invention comprises an integrated oil passage block composed of a relief valve (1), a ball valve (2) and an oil passage block (4); the oil passage block (4) has an oil passage, the oil passage comprises an oil passage a and an oil passage d, the two oil passage ports of the oil passage a are respectively a P oil port and an A oil port, and the two oil passage ports of the oil passage d are respectively a T oil port and a B oil port; the oil passage further comprises an oil passage b for connecting the P oil port to the T oil port, the ball valve (2) being arranged on the oil passage b; the oil passage further comprises an oil passage c intersecting with the oil passages a and d, the relief valve (1) is connected in series to the oil passage c, and the relief port of the relief valve (1) is communicated with the T oil port.

2. The hydraulic device for external hydraulic tools according to claim 1, characterized in that: A pressure measuring oil passage is provided near the P oil port in the oil passage a. The oil passage opening of the pressure measuring oil passage is the MP oil port on the surface of the oil passage block (4). A pressure measuring joint (3) is installed at the MP oil port.

3. The hydraulic device for external hydraulic tools according to claim 1, characterized in that: The relief valve (1) is a spring-controlled direct-acting relief valve. The relief valve (1) is connected in series to the oil passage c and in parallel to the ball valve (2) connected in series to the oil passage b. The oil passages b and c intersect with the oil passages a and d.

4. The hydraulic device for external hydraulic tools according to claim 1, characterized in that: The oil passage b is connected in series with a two-way solenoid valve or a ball valve for controlling the on-off of the oil passage, and the ball valve (2) has the function of manually controlling the on-off of the oil passage.

5. The hydraulic device for external hydraulic tools according to claim 1, characterized in that: Oil passage a intersects with oil passage b near the P oil port, oil passage d communicates with the T oil port and the B oil port, and oil passage d intersects with oil passage b and oil passage c.

6. A hydraulic device for an external hydraulic tool, characterized in that: The invention comprises an oil passage a and an oil passage d, wherein the two oil passage openings of the oil passage a are respectively the oil opening P and the oil opening A, and the two oil passage openings of the oil passage d are respectively the oil opening T and the oil opening B; the invention also comprises an oil passage b for connecting the oil opening P to the oil opening T, and the oil passage b is provided with a ball valve (2); the invention also comprises an oil passage c intersecting with the oil passage a and the oil passage d, and an overflow valve (1) is connected in series to the oil passage c, and the overflow opening of the overflow valve (1) is communicated with the oil opening T.

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