A continuously operating device for a valve-controlled supercharged cylinder of a construction machine

Abstract

The application discloses a continuous operation device of a valve-controlled supercharged cylinder of an engineering machine, which comprises an operation cylinder, a supercharged cylinder assembly, an operation reversing valve, an oil tank and an oil pump, the supercharged cylinder assembly is connected with the operation cylinder and the operation reversing valve respectively, the operation reversing valve is connected with the oil tank, and the oil pump is connected with the operation reversing valve. When the operation cylinder needs supercharged operation, the operation reversing valve is reversed, so that the oil pump supplies oil to the supercharged cylinder assembly through the operation reversing valve, the supercharged cylinder assembly continuously supercharges the operation cylinder, and the working efficiency is improved; when the operation cylinder needs to change the operation direction, the operation reversing valve is reversed, so that the oil pump directly supplies oil to the operation cylinder through the operation reversing valve.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic technology, in particular to a continuous operation device of a valve-controlled supercharged cylinder of an engineering machine. BACKGROUND

[0002] Engineering machines are commonly used in construction projects. For example, when a pile press is used for construction, the walking cylinder moves slowly due to its own weight, which leads to low construction efficiency.

[0003] In order to improve the construction efficiency, a common way is to increase the working flow. However, this way puts higher requirements on the performance of the engine, hydraulic pump and motor, and increases the manufacturing and use cost of the whole machine. SUMMARY

[0004] The purpose of the present application is to provide a continuous operation device of a valve-controlled supercharged cylinder of an engineering machine, which can effectively improve the working efficiency.

[0005] To achieve the above purpose, the present application provides the following technical solutions:

[0006] A continuous operation device of a valve-controlled supercharged cylinder of an engineering machine, comprising: a working cylinder, a supercharged cylinder assembly, a working reversing valve, an oil tank and an oil pump, the supercharged cylinder assembly is connected with the working cylinder and the working reversing valve respectively, the working reversing valve is connected with the oil tank, the oil pump is used to supply oil to the supercharged cylinder assembly through the working reversing valve, the supercharged cylinder assembly is used to continuously supercharge the working cylinder, and the working reversing valve is used to control the working direction of the working cylinder.

[0007] Preferably, the supercharged cylinder assembly comprises a double-piston rod oil cylinder and a first multi-way valve, two output oil ports of the double-piston rod oil cylinder are respectively communicated with rodless cavities of the working cylinder through first one-way valves, the first multi-way valve is connected with the double-piston rod oil cylinder, and is used to control the reciprocating motion of the double-piston rod oil cylinder.

[0008] Preferably, two ends of the double-piston rod oil cylinder are respectively connected with the working reversing valve through a second one-way valve, and the second one-way valve is communicated with the first one-way valve located on the same side of the double-piston rod oil cylinder.

[0009] Preferably, an adjustable valve is further included, the adjustable valve is connected with the working reversing valve, the working cylinder and the first multi-way valve respectively, and is used to control the direct flow of hydraulic oil into the working cylinder, or control the flow of hydraulic oil into the working cylinder from the first multi-way valve and the double-piston rod oil cylinder in sequence.

[0010] Preferably, the first multi-way valve is a two-position four-way electromagnetic valve.

[0011] Preferably, the supercharged cylinder assembly comprises a second multi-way valve and a plurality of supercharged cylinders, each of the supercharged cylinders being arranged in a plurality of oil paths in the second multi-way valve.

[0012] Preferably, the second multi-way valve is a three-position two-way electromagnetic valve, one of the supercharged cylinders being arranged in each of two oil paths of the three-position two-way electromagnetic valve.

[0013] Compared with the prior art, the technical solution has the following advantages:

[0014] 1. The supercharged cylinder assembly can continuously supercharge the operation cylinder, thereby improving the operation efficiency.

[0015] 2. The first multi-way valve can control the reciprocating motion of the double-piston rod oil cylinder, thereby continuously supercharging the operation cylinder.

[0016] 3. The plurality of supercharged cylinders arranged in the second multi-way valve not only achieve the purpose of continuous increase, but also improve the compactness of the valve body. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0018] Figure 1 A hydraulic principle diagram of the valve-controlled supercharged cylinder continuous operation device of the engineering machinery provided in one specific embodiment of the present application;

[0019] Figure 2 A hydraulic principle diagram of the valve-controlled supercharged cylinder continuous operation device of the engineering machinery provided in another specific embodiment of the present application.

[0020] The reference signs are as follows:

[0021] 1 is an operation cylinder, 2 is a double-piston rod oil cylinder, 3 is a first multi-way valve, 4 is an adjustable valve, 5 is an operation reversing valve, 6 is a first one-way valve, 7 is a second one-way valve, 8 is a second multi-way valve, and 9 is a supercharged cylinder. DETAILED DESCRIPTION

[0022] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present application.

[0023] Please refer to Figure 1 and Figure 2 .

[0024] The continuous operation device of the valve-controlled supercharged cylinder of the engineering machinery provided by the embodiment of the present application comprises a working cylinder 1, a supercharged cylinder assembly, a working reversing valve 5, an oil tank and an oil pump, the supercharged cylinder assembly is connected with the working cylinder 1 and the working reversing valve 5 respectively, the working reversing valve 5 is connected with the oil tank, and the oil pump is connected with the working reversing valve 5. When the working cylinder 1 needs to be supercharged, the working reversing valve 5 is reversed to make the oil pump supply oil to the supercharged cylinder assembly through the working reversing valve 5, so that the supercharged cylinder assembly continuously supercharges the working cylinder 1 to improve the working efficiency; when the working cylinder 1 needs to change the working direction, the working reversing valve 5 is reversed to make the oil pump supply oil to the working cylinder 1 directly through the working reversing valve 5.

[0025] Specifically, the supercharged cylinder assembly includes two structures, as shown in Figure 1 The first supercharged cylinder assembly comprises a double-piston rod oil cylinder 2 and a first multi-way valve 3, the first multi-way valve 3 is preferably a two-position four-way electromagnetic valve, two output oil ports of the double-piston rod oil cylinder 2 are respectively connected with the rodless cavity of the working cylinder 1 through first one-way valves 6, the rod cavity of the working cylinder 1 is connected with the working reversing valve 5, and the first multi-way valve 3 is connected with the double-piston rod oil cylinder 2. When supercharging is needed, the working reversing valve 5 supplies oil to the first multi-way valve 3, when the first multi-way valve 3 is in the left position, hydraulic oil enters the cylinder body from the oil port on the right side of the cylinder body of the double-piston rod oil cylinder 2, then pushes the piston of the double-piston rod oil cylinder 2 to move left, and because the end surface of the piston rod is smaller than the end surface of the piston in the cylinder body, when the piston rod moves left, the working cylinder 1 can be supercharged; when moving to the limit position, the first multi-way valve 3 is controlled to be in the right position, at this time, hydraulic oil enters the cylinder body from the oil port on the left side of the cylinder body of the double-piston rod oil cylinder 2, then pushes the piston of the double-piston rod oil cylinder 2 to move right, and then supercharges the working cylinder 1, and the continuous supercharging purpose can be achieved by controlling the reciprocating movement of the piston rod of the double-piston rod oil cylinder 2.

[0026] Further, the two ends of the double piston rod oil cylinder 2 are connected with the operation reversing valve 5 through a second one-way valve 7 respectively, the second one-way valve 7 is communicated with the first one-way valve 6 located at the same side of the double piston rod oil cylinder 2, when the hydraulic oil flows out from the operation reversing valve 5, it is divided into two parts, one part flows into the rodless chamber of the operation cylinder 1 through the second one-way valve 7 and the first one-way valve 6 in turn, the other part flows into the cylinder body of the double piston rod oil cylinder 2 through the first multi-way valve 3, so as to control the reciprocating movement of the piston rod.

[0027] Further, the adjustable valve 4 is further included, the adjustable valve 4 can change the flow direction of the hydraulic oil according to whether the operation cylinder 1 needs to be increased, the adjustable valve 4 can be a two-position three-way electromagnetic valve, the adjustable valve 4 is connected with the operation reversing valve 5, the operation cylinder 1 and the first multi-way valve 3 respectively, the adjustable valve 4 is used to control the hydraulic oil to flow into the operation cylinder 1 directly or to control the hydraulic oil to flow into the operation cylinder 1 through the first multi-way valve 3 and the double piston rod oil cylinder 2 in turn, when the hydraulic oil directly flows into the rodless chamber of the operation cylinder 1 through the adjustable valve 4, at this time, there is no pressure increasing effect on the operation cylinder 1, when the hydraulic oil flows into the operation cylinder 1 through the first multi-way valve 3 and the double piston rod oil cylinder 2, the operation cylinder 1 can be pressurized.

[0028] As shown in Figure 2 The second pressurizing cylinder assembly includes a second multi-way valve 8 and a plurality of pressurizing cylinders 9, each pressurizing cylinder 9 is arranged in a plurality of oil paths in the second multi-way valve 8, when one of the pressurizing cylinders 9 moves to the limit position, another pressurizing cylinder 9 can be switched to continue pressurizing, so as to achieve the purpose of continuous pressurizing. Among them, the second multi-way valve 8 is preferably a three-position two-way electromagnetic valve, two of the three-position two-way electromagnetic valve oil paths are respectively provided with a pressurizing cylinder 9, and the other one is not provided with a pressurizing cylinder 9, when pressurizing is not needed, the oil path without the pressurizing cylinder 9 can be used to transport hydraulic oil. By arranging the pressurizing cylinder 9 in the second multi-way valve 8, the integration degree of the valve body structure is improved.

[0029] Each embodiment in the specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between each embodiment can be referred to each other.

[0030] The above describes in detail the continuous operation device of the valve-controlled pressurizing cylinder of the engineering machinery provided by the present application. The principles and implementation modes of the present application are described by applying specific examples in this paper. The above description of the embodiments is only used to help understand the method and core idea of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, the present application can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A continuous operation device for a valve-controlled booster cylinder in engineering machinery, characterized in that, include: The system includes a working cylinder, a booster cylinder assembly, a working directional valve, an oil tank, and an oil pump. The booster cylinder assembly is connected to both the working cylinder and the working directional valve. The working directional valve is connected to the oil tank. The oil pump supplies oil to the booster cylinder assembly through the working directional valve. The booster cylinder assembly continuously pressurizes the working cylinder. The working directional valve controls the working direction of the working cylinder. The booster cylinder assembly includes a double piston rod cylinder and a first multi-way valve. The two output ports of the double piston rod cylinder are respectively connected to the rodless chamber of the working cylinder through a first one-way valve. The first multi-way valve is a two-position four-way solenoid valve. The first multi-way valve is connected to the double piston rod cylinder and is used to control the reciprocating motion of the double piston rod cylinder. The two output ports of the double piston rod cylinder are respectively connected to the working reversing valve through a second check valve. The second check valve is connected to the first check valve located at the same output port end of the double piston rod cylinder. It also includes an adjustable valve, which is connected to the working directional valve, the working cylinder and the first multi-way valve respectively. The adjustable valve is used to control the hydraulic oil to flow directly into the working cylinder, or to control the hydraulic oil to flow into the working cylinder sequentially from the first multi-way valve and the double piston rod cylinder. Alternatively, the booster cylinder assembly includes a second multi-way valve and multiple booster cylinders, each of which is respectively disposed in multiple oil circuits within the second multi-way valve. The second multi-way valve is a three-position two-way solenoid valve, and one of the booster cylinders is disposed in each of two oil circuits of the three-position two-way solenoid valve. The booster cylinder assembly is only connected to the rodless chamber of the working cylinder.

Images