Integrated valve group and engineering machinery

Abstract

The utility model relates to the technical field of hydraulic transmission, and provides an integrated valve group and engineering machinery, the integrated valve group comprises a valve body, and a first reversing valve, a second reversing valve, a first unloading valve, a liquid inlet, a liquid outlet, an energy accumulator liquid port and a plurality of working liquid ports which are arranged on the valve body, a port P of the first reversing valve and a port P of the second reversing valve are both communicated with the liquid inlet, a port T of the first reversing valve and a port T of the second reversing valve are both communicated with the liquid outlet, a port A and a port B of the first reversing valve and a port A and a port B of the second reversing valve are respectively communicated with the working liquid port, and the liquid inlet end of the first unloading valve is communicated with the liquid port of the energy accumulator. The liquid outlet end of the first unloading valve communicates with the liquid outlet, and the energy accumulator liquid opening communicates with the liquid inlet. The integrated valve set is high in integration level, compact in structure and convenient to control, the arrangement number and arrangement complexity of pipelines are reduced, occupied space and cost are saved, meanwhile, the overall weight of the system is reduced, and multiple functions and light weight of the integrated valve set are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic transmission, in particular to an integrated valve group and engineering machinery. Background Art

[0002] Hydraulic transmission refers to a transmission method that uses liquid as the working medium for energy transmission and control. It is widely used in construction machinery. The use of hydraulic transmission technology in construction machinery can simplify the structure of the machine, reduce machine weight, reduce material consumption, reduce manufacturing costs, reduce labor intensity, and improve work efficiency and work reliability.

[0003] At present, in construction machinery, such as concrete pump trucks, the hydraulic transmission system is one of the most core working equipment. In order to realize the main functions of the concrete pump truck, such as controlling the reversing of the swing cylinder, the charging and unloading of the accumulator, the forward and reverse rotation of the hydraulic motor stirring shaft, etc., it is generally realized through the valve group in the hydraulic transmission system.

[0004] However, in the prior art, valve groups that realize the main functions of engineering machinery are generally set up separately, such as the reversing valve group that realizes the reversing of the swing cylinder of the concrete pump truck, and the reversing valve group that realizes the forward and reverse rotation of the stirring shaft of the hydraulic motor of the concrete pump truck. In addition, an additional manual ball valve is used to control the charging and unloading of the accumulator. Especially when there are regulations for remote control of the charging and unloading of the accumulator, it is necessary to add an independent unloading valve group and pipelines to control the charging and unloading of the accumulator. All of the above increase the overall weight of the system and the complexity of the oil circuit. Utility Model Content

[0005] The technical problem to be solved by the utility model is: how to reduce the complexity and weight of the hydraulic transmission system.

[0006] The utility model provides an integrated valve group, comprising a valve body and a first reversing valve, a second reversing valve, a first unloading valve, a liquid inlet, a liquid outlet, an accumulator liquid port and a plurality of working liquid ports arranged on the valve body, wherein the P port of the first reversing valve and the P port of the second reversing valve are both connected to the liquid inlet, the T port of the first reversing valve and the T port of the second reversing valve are both connected to the liquid outlet, and the A port and the B port of the first reversing valve and the A port and the B port of the second reversing valve are respectively connected to the working liquid port, the liquid inlet end of the first unloading valve is connected to the accumulator liquid port, the liquid outlet end of the first unloading valve is connected to the liquid outlet, and the accumulator liquid port is connected to the liquid inlet.

[0007] Optionally, the integrated valve group also includes a third reversing valve arranged on the valve body, the third reversing valve is an electromagnetic reversing valve, the first reversing valve is a hydraulically controlled reversing valve, the P port of the third reversing valve is connected to the liquid inlet, the T port of the third reversing valve is connected to the liquid outlet, and the A port and B port of the third reversing valve are respectively connected to the hydraulically controlled ports at both ends of the first reversing valve.

[0008] Optionally, the liquid inlet includes a first liquid inlet and a second liquid inlet, the liquid outlet includes a first liquid outlet and a second liquid outlet, the first liquid inlet is respectively connected to the P port of the first reversing valve and the P port of the third reversing valve, the second liquid inlet is connected to the P port of the second reversing valve, the first liquid outlet is connected to the T port of the first reversing valve, the second liquid outlet is respectively connected to the T port of the second reversing valve, the T port of the third reversing valve and the liquid outlet end of the first unloading valve, and the accumulator liquid port is connected to the first liquid inlet.

[0009] Optionally, the integrated valve group further comprises a second unloading valve and a liquid drain port respectively arranged on the valve body, the liquid inlet end of the second unloading valve is communicated with the first liquid inlet port, and the liquid outlet end of the second unloading valve is communicated with the liquid drain port.

[0010] Optionally, the integrated valve group also includes a one-way valve arranged on the valve body, the liquid inlet end of the one-way valve is connected to the first liquid inlet, the liquid outlet end of the one-way valve is respectively connected to the P port of the first reversing valve, the P port of the third reversing valve and the accumulator liquid port, and the one-way valve is connected between the second unloading valve and the accumulator liquid port.

[0011] Optionally, the integrated valve group further comprises a first overflow valve disposed on the valve body, a liquid inlet end of the first overflow valve is communicated with the first liquid inlet, and an overflow end of the first overflow valve is communicated with the liquid drain port;

[0012] And / or, the integrated valve group further comprises a second overflow valve arranged on the valve body, a liquid inlet end of the second overflow valve is communicated with the second liquid inlet, and an overflow end of the second overflow valve is communicated with the second liquid outlet.

[0013] Optionally, the integrated valve group also includes a manual knob, the first unloading valve is a solenoid valve, the second reversing valve is a solenoid reversing valve, the manual knob is arranged on the valve body, and is located at the solenoid coil of the third reversing valve and / or the second reversing valve and / or the first unloading valve, and is used to manually adjust the valve core position of the third reversing valve and / or the second reversing valve and / or the first unloading valve.

[0014] Optionally, the integrated valve group further comprises a first control liquid port and a second control liquid port provided on the valve body, and the first control liquid port and the second control liquid port are respectively connected to the liquid control ports at both ends of the first reversing valve.

[0015] Optionally, the integrated valve group further includes a damper arranged on the valve body, and the damper is connected between the accumulator fluid port and the first unloading valve.

[0016] Compared with the prior art, the integrated valve group provided by the utility model has the following technical effects:

[0017] The integrated valve group provided by the utility model can be applied to the hydraulic transmission system of engineering machinery, by setting a valve body, and integrating the first reversing valve, the second reversing valve, the first unloading valve, and multiple working fluid ports, accumulator fluid ports, liquid inlets and liquid outlets on one valve body, by connecting the P port and the T port of the first reversing valve with the liquid inlet and the liquid outlet respectively, and by connecting the P port and the T port of the second reversing valve with the liquid inlet and the liquid outlet respectively, and by connecting the A port and the B port of the first reversing valve and the second reversing valve with the working fluid port respectively, so that the hydraulic execution action of at least two actuators in the hydraulic transmission system can be integrated on one valve body, such as the hydraulic transmission system of a concrete pump truck in engineering machinery. In the system, the working fluid port connected to the first reversing valve can be connected to the swing cylinder of the concrete pump truck, and the working fluid port connected to the second reversing valve can be connected to the mixing hydraulic motor of the concrete pump truck, and then the swing reversing of the concrete pump truck and the forward and reverse switching of the mixing shaft can be realized by regulating the first reversing valve and the second reversing valve. At the same time, by respectively connecting the accumulator fluid port with the fluid inlet and the fluid inlet end of the first unloading valve, and by connecting the fluid outlet end of the first unloading valve with the fluid outlet, the accumulator fluid port can be externally connected to the accumulator, so that the excess working fluid in the operation process of the hydraulic transmission system using the integrated valve group can be accumulated in the accumulator, and the accumulator can be unloaded by regulating the first unloading valve to realize the pressurization unloading of the accumulator. Through the above-mentioned structural arrangement, multiple hydraulic transmission operation functions such as accumulator charging and unloading, concrete pump truck swing reversing and agitator shaft forward and reverse switching can be integrated on one valve body. It not only has high integration, compact structure and easy operation, but also reduces the number and complexity of pipeline layout, saves space and cost, and reduces the overall weight of the system, thereby realizing the multifunctionality and lightweight of the integrated valve group.

[0018] In addition, the utility model also provides an engineering machine, comprising the above-mentioned integrated valve group.

[0019] Compared with the prior art, the engineering machinery provided by the utility model has substantially the same technical effect as the above-mentioned integrated valve group by setting the above-mentioned integrated valve group, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the composition of the integrated valve group in the embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the main structure of the integrated valve group according to an embodiment of the utility model;

[0022] Figure 3 for Figure 2 A rear view structural diagram of ;

[0023] Figure 4 for Figure 2 Schematic diagram of the structure viewed from above.

[0024] Description of reference numerals:

[0025] 1-first reversing valve, 2-second reversing valve, 3-third reversing valve, 4-first unloading valve, 5-second unloading valve, 6-check valve, 7-first overflow valve, 8-second overflow valve, 9-damping, 10-valve body, 11-manual knob, A1-first working fluid port, B1-second working fluid port, A2-third working fluid port, B2-fourth working fluid port, P1-first fluid inlet, P2-second fluid inlet, P3-accumulator fluid port, P4-first control fluid port, P5-second controller fluid port, T1-first fluid outlet, T2-second fluid outlet, T3-drain port, M1-first pressure measuring port, M2-second pressure measuring port. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein.

[0028] In the description of the present invention, the directions or positional relationships indicated by “upper”, “lower”, “left”, “right”, “top”, “bottom”, “front”, “back”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention. They do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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; 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.

[0030] In the description of this specification, the description with reference to the terms "embodiment", "one embodiment" and "one implementation" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or implementation are included in at least one embodiment or implementation of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or implementation. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or implementations in a suitable manner.

[0031] To solve the above technical problems, Figure 1 and Figure 4 As shown, an embodiment of the utility model provides an integrated valve group, including a valve body 10 and a first reversing valve 1, a second reversing valve 2, a first unloading valve 4, a liquid inlet, a liquid outlet, an accumulator liquid port P3 and a plurality of working liquid ports arranged on the valve body 10, the P port of the first reversing valve 1 and the P port of the second reversing valve 2 are both connected to the liquid inlet, the T port of the first reversing valve 1 and the T port of the second reversing valve 2 are both connected to the liquid outlet, and the A port and the B port of the first reversing valve 1 and the A port and the B port of the second reversing valve 2 are respectively connected to the working liquid port, the liquid inlet end of the first unloading valve 4 is connected to the accumulator liquid port P3, the liquid outlet end of the first unloading valve 4 is connected to the liquid outlet, and the accumulator liquid port P3 is connected to the liquid inlet.

[0032] It should be noted that the liquid inlet and the liquid outlet in this embodiment can be set to multiple, for example Figure 1 and Figure 3 The first liquid inlet P1 and the second liquid inlet P2 shown in FIG. Figures 1 to 3 The first liquid outlet T1 and the second liquid outlet T2 shown in FIG. 1 are shown in FIG. 1 , and the working liquid port provided on the valve body 10 may be, for example, Figure 1 and Figure 2The first working fluid port A1, the second working fluid port B1, the third working fluid port A2 and the fourth working fluid port B2 shown in the figure. Of course, the working fluid port may also include others, which may be set according to the hydraulic power port of the actuator in the actual hydraulic transmission system, and are not specifically limited here. At the same time, it should be understood that the valve body 10 is provided with pipelines and interfaces for the circulation of working fluid (such as hydraulic oil) according to the connection relationship between the first reversing valve 1, the second reversing valve 2, the first unloading valve 4 and each liquid inlet, liquid outlet, accumulator liquid port P3, working fluid port, etc., which may be set according to actual functional requirements, and are not specifically limited here. For example, Figure 1 The solid and dotted lines in the valve body 10 shown in the figure represent pipelines for the circulation of working fluid, the solid line represents the power drive fluid pipeline, such as the drive hydraulic oil pipeline with large flow and pressure, and the dotted line represents the control hydraulic oil pipeline. Of course, the accompanying drawings are only used as the connection relationship between the above-mentioned components, and the specific connection form can also be other.

[0033] Specifically, Figure 1 As shown, the working principle of the integrated valve group is explained by taking a concrete pump truck as an engineering machinery as an example. The hydraulic transmission system on the concrete pump truck includes a hydraulic pump, an oil tank, a swing cylinder, a mixing hydraulic motor, an accumulator and the above-mentioned integrated valve group. The first liquid inlet P1 and the second liquid inlet P2 of the integrated valve group are both connected to the hydraulic pump, the first working liquid port A1 and the second working liquid port B1 of the integrated valve group are connected to the swing cylinder, the third working liquid port A2 and the fourth working liquid port B2 are connected to the mixing hydraulic motor, the first liquid outlet T1 and the second liquid outlet T2 of the integrated valve group are connected to the oil tank, the hydraulic pump drives the hydraulic oil to flow through the first reversing valve 1, and the hydraulic oil is adjusted from the A port to the B port by regulating the first reversing valve 1. Or port B enters the first working fluid port A1 or the second working fluid port B1, and then the reversing of the swing cylinder can be controlled by adjusting the first reversing valve 1. Similarly, port A and port B of the second reversing valve 2 can be connected to the third working fluid port A2 and the fourth working fluid port B2, and then the forward and reverse rotation of the mixing hydraulic motor can be controlled by adjusting the second reversing valve 2. In addition, the accumulator fluid port P3 of the integrated valve group is connected to the accumulator, and the accumulator accumulates hydraulic oil through the accumulator fluid port P3. When the concrete pump truck is in standby or the operation is completed, the accumulator is unloaded by adjusting the first unloading valve 4 of the integrated valve group, and the hydraulic oil flows back to the oil tank through the second liquid outlet T2, making the operation safer and more reliable. Of course, the concrete pump truck is only an example to illustrate the working principle of the integrated valve group. The integrated valve group can also be applied to other engineering machinery, such as cranes, fracturing equipment, etc., as long as it has a hydraulic transmission system that needs to integrate different hydraulic actuator action functions and charge and unload the accumulator, and no specific limitation is made here.

[0034] In this embodiment, the integrated valve group provided in this embodiment can be applied to the hydraulic transmission system of engineering machinery, by setting a valve body 10, and integrating the first reversing valve 1, the second reversing valve 2, the first unloading valve 4, and multiple working fluid ports, the accumulator fluid port P3, the liquid inlet and the liquid outlet on one valve body 10, by connecting the P port and the T port of the first reversing valve 1 with the liquid inlet and the liquid outlet respectively, and by connecting the P port and the T port of the second reversing valve 2 with the liquid inlet and the liquid outlet respectively, and by connecting the A port and the B port of the first reversing valve 1 and the second reversing valve 2 with the working fluid port respectively, so that the hydraulic execution action of at least two actuators in the hydraulic transmission system can be integrated on one valve body 10, such as the hydraulic actuator of a concrete pump truck in engineering machinery. In the hydraulic transmission system, the working fluid port connected to the first reversing valve 1 can be connected to the swing cylinder of the concrete pump truck, and the working fluid port connected to the second reversing valve 2 can be connected to the mixing hydraulic motor of the concrete pump truck, so that the swing reversing of the concrete pump truck and the forward and reverse switching of the mixing shaft can be realized by regulating the first reversing valve 1 and the second reversing valve 2. At the same time, by respectively connecting the accumulator fluid port P3 with the fluid inlet and the fluid inlet end of the first unloading valve 4, and by connecting the fluid outlet end of the first unloading valve 4 with the fluid outlet, the accumulator fluid port P3 can be externally connected to the accumulator, so that the excess working fluid can be accumulated in the accumulator during the operation of the hydraulic transmission system using the integrated valve group, and the accumulator can be unloaded by regulating the first unloading valve 4 to realize the pressurization and unloading of the accumulator. Through the above-mentioned structural arrangement, multiple hydraulic transmission operation functions such as accumulator charging and unloading, concrete pump truck swing reversing and agitator shaft forward and reverse switching can be integrated on one valve body 10. It not only has high integration, compact structure and easy operation, but also reduces the number and complexity of pipeline layout, saves space and cost, and reduces the overall weight of the system, thereby realizing the multifunctionality and lightweight of the integrated valve group.

[0035] Alternatively, if Figure 1 As shown, the integrated valve group also includes a third reversing valve 3 arranged on the valve body 10, the third reversing valve 3 is an electromagnetic reversing valve, the first reversing valve 1 is a hydraulically controlled reversing valve, the P port of the third reversing valve 3 is connected to the liquid inlet, the T port of the third reversing valve 3 is connected to the liquid outlet, and the A port and the B port of the third reversing valve 3 are respectively connected to the hydraulically controlled ports at both ends of the first reversing valve 1.

[0036] Specifically, the A port and the B port of the first reversing valve 1 can be connected to the first working fluid port A1 and the second working fluid port B1 respectively, and the first working fluid port A1 and the second working fluid port B1 can be connected to an external hydraulic actuator with relatively high power, such as a swing cylinder of a concrete pump truck, and the A port or the B port of the third reversing valve 3 is electromagnetically controlled to be connected, and the conduction of the A port or the B port of the first reversing valve 1 is regulated by, for example, hydraulic oil flowing through the A port and the B port of the third reversing valve 3, thereby regulating the swing reversing of the concrete pump truck, and the regulation is more stable.

[0037] It should be noted that for hydraulic actuators with large power requirements, such as the swing cylinder of a concrete pump truck, hydraulic oil with a large flow and pressure is required to drive them. At this time, if it is only regulated by a reversing valve, the reversing valve needs to be set to a larger volume, and a pipeline with a larger flow needs to be set, which is not conducive to the lightweight design of the system.

[0038] In this embodiment, the third reversing valve 3 is integrated on the valve body 1, and the third reversing valve 3 is set as an electromagnetic reversing valve, and the first reversing valve 1 is set as a hydraulically controlled reversing valve, and the two are connected, so that the first reversing valve 1 can be used as a main valve for regulating the hydraulic actuator, and the third reversing valve 3 can be used as a pilot valve, that is, the third reversing valve 3 is electromagnetically regulated, and then the first reversing valve 1 is hydraulically controlled by the working fluid flowing through the third reversing valve 3. At this time, the first reversing valve 1 can rely on the hydraulic control power with a larger power to offset the electromagnetic force to regulate the first reversing valve 1, and then the third reversing valve 3 and the first reversing valve 1 can cooperate to regulate a larger power hydraulic actuator, and the volume and weight of the first reversing valve 1 and the third reversing valve 3 will not be increased, which is more conducive to the overall lightweight design, and is easy to control and more stable to control.

[0039] Alternatively, if Figures 1 to 3 As shown, the liquid inlet includes a first liquid inlet P1 and a second liquid inlet P2, and the liquid outlet includes a first liquid outlet T1 and a second liquid outlet T2, the first liquid inlet P1 is respectively connected to the P port of the first reversing valve 1 and the P port of the third reversing valve 3, the second liquid inlet P2 is connected to the P port of the second reversing valve 2, the first liquid outlet T1 is connected to the T port of the first reversing valve 1, the second liquid outlet T2 is respectively connected to the T port of the second reversing valve 2, the T port of the third reversing valve 3 and the liquid outlet end of the first unloading valve 4, and the accumulator liquid port P3 is connected to the first liquid inlet P1.

[0040] It should be noted that, as mentioned above, when the first reversing valve 1 is used as the main valve to regulate a relatively high-power hydraulic actuator, such as the swing cylinder of a concrete pump truck, the hydraulic oil flowing through the first reversing valve 1 has a relatively large flow rate and impact force. If the return liquid of the first reversing valve 1, the third reversing valve 3, and the second reversing valve 2 are all connected to one liquid outlet, at this time, the impact of the return liquid of the first reversing valve 1 may affect the return liquid of the third reversing valve 3 and the second reversing valve 2, thereby causing unstable reversing regulation.

[0041] In this embodiment, the liquid inlet is separated into the first liquid inlet P1 and the second liquid inlet P2, and the liquid outlet is separated into the first liquid outlet T1 and the second liquid outlet T2, and the first reversing valve 1, the second reversing valve 2, the third reversing valve 3 and the first unloading valve 4 are separated and connected accordingly. Through the liquid inlet separation setting, the corresponding power or flow can be regulated and distributed respectively, the regulation is more stable, no additional hydraulic loss is generated, and energy is saved. In addition, by separating the liquid outlet, the first reversing valve 1 can be connected to the hydraulic actuator required for regulating larger power and flow, preventing the return liquid from causing adverse effects such as impact on other components, thereby further improving the regulation stability of the integrated valve group.

[0042] Alternatively, if Figures 1 to 3 As shown, the integrated valve group also includes a second unloading valve 5 and a liquid drain port T3 respectively arranged on the valve body 10, the liquid inlet end of the second unloading valve 5 is connected to the first liquid inlet P1, and the liquid outlet end of the second unloading valve 5 is connected to the liquid drain port T3.

[0043] Specifically, the second unloading valve 5 is a solenoid valve, which can unload the swing system of, for example, a concrete pump truck through electrical control, and the drain port T3 is connected to the oil tank. More specifically, the second unloading valve 5 is a two-position two-way solenoid valve. When, for example, the swing system of a concrete pump truck is not working, the second unloading valve 5 can be controlled to conduct the pipeline to unload.

[0044] In this embodiment, by arranging the second unloading valve 5 and the drain port T3 on the valve body 10, and by connecting the liquid inlet end of the second unloading valve 5 with the first liquid inlet P1, and connecting the liquid outlet end with the drain port T3, when the swing system of, for example, a concrete pump truck connected to the first liquid inlet P1 is not working, the second unloading valve 5 can be controlled to conduct the pipeline for unloading, without causing hydraulic loss, and the overall system is more stable and safe.

[0045] Alternatively, if Figure 1 and Figure 4As shown, the integrated valve group also includes a one-way valve 6 arranged on the valve body 10, the liquid inlet end of the one-way valve 6 is connected to the first liquid inlet P1, the liquid outlet end of the one-way valve 6 is respectively connected to the P port of the first reversing valve 1, the P port of the third reversing valve 3 and the accumulator liquid port P3, and the one-way valve 6 is connected between the second unloading valve 5 and the accumulator liquid port P3.

[0046] Specifically, the one-way valve 6 is a spring-loaded one-way valve, that is, it will be turned on only when the pressure in the pipeline reaches a set value, which facilitates precise control and regulation of the pressure in the pipeline and is more accurate and stable to use.

[0047] In this embodiment, a one-way valve 6 is integrated in the valve body 10 and connected between the first liquid inlet P1 and the first reversing valve 1, the third reversing valve 3, and the accumulator liquid port P3, so that when the first reversing valve 1, the second reversing valve 3 and the accumulator connected to the accumulator liquid port P3 are working, the working fluid will only flow in one direction and will not flow back to the first liquid inlet P1, and the one-way valve 6 is arranged between the second unloading valve 5 and the accumulator liquid port P3, so that when, for example, the accumulator connected to the accumulator liquid port P3 is unloaded through the first unloading valve 4, it will not be unloaded to the first oil inlet P1, thereby making the system more stable and convenient for precise control, without interference between components, and improving the controllability of the overall system.

[0048] Optionally, as shown in Figure to Figure 3 As shown, the integrated valve group further includes a first overflow valve 7 disposed on the valve body 10, the liquid inlet end of the first overflow valve 7 is communicated with the first liquid inlet P1, and the overflow end of the first overflow valve 7 is communicated with the liquid drain port T3;

[0049] And / or, the integrated valve group further includes a second overflow valve 8 disposed on the valve body 10, the liquid inlet end of the second overflow valve 8 is connected to the second liquid inlet P2, and the overflow end of the second overflow valve 8 is connected to the second liquid outlet T2.

[0050] Specifically, the valve body 10 is provided with a first relief valve 7 and a second relief valve 8. The first relief valve 7 and the second relief valve 8 can be the same or different and can be set according to the pressure control requirements of the actual connecting pipeline and the execution system. For example, the execution system connected to the first liquid inlet P1 requires a larger pressure, that is, the rated pressure of the first unloading valve 7 is greater than the rated pressure of the second unloading valve 8. For example, the first liquid inlet P1 is used to supply liquid to the swing system of the concrete pump truck, and the second liquid inlet P2 is used to supply liquid to the mixing system of the concrete pump truck. The pressure required by the swing system is greater than the pressure of the mixing system. At this time, a relief valve with a rated pressure of 180 bar can be selected as the first relief valve 7, and a relief valve with a rated pressure of 120 bar can be selected as the second relief valve 8.

[0051] In this embodiment, by providing the first overflow valve 7 and / or the second overflow valve 8 on the pipeline connected to the first liquid inlet P1 and / or the second liquid inlet P2, when the pressure in the execution system connected to the first liquid inlet P1 and / or the second liquid inlet P2 is too high, the first overflow valve 7 and / or the second overflow valve 8 can be used to overflow and reduce pressure, and the excess pressure can be removed through the drain port T3 and / or the second liquid outlet T2, so that the overall system operation is more stable and safe.

[0052] Alternatively, if Figures 2 to 4 As shown, the integrated valve group also includes a manual knob 11, the first unloading valve 4 is a solenoid valve, the second reversing valve 2 is a solenoid reversing valve, the manual knob 11 is arranged on the valve body 10, and is located at the solenoid coil of the third reversing valve 3 and / or the second reversing valve 2 and / or the first unloading valve 4, and is used to manually adjust the valve core position of the third reversing valve 3 and / or the second reversing valve 2 and / or the first unloading valve 4.

[0053] It should be noted that the structure of the manual knob 11 shown in the accompanying drawings is for illustration only, and its specific structure may be a lever, a paddle, a push rod, a push button or others, as long as the valve core position of, for example, the third reversing valve 3, the second reversing valve 2, and the first unloading valve 4 can be changed by manual operation, and its structure is not specifically limited here.

[0054] In this embodiment, by setting the first unloading valve 4 as an electromagnetic valve and the second reversing valve 2 as an electromagnetic reversing valve, the accumulator connected to the accumulator fluid port P3 and the actuator connected to the second reversing valve 2 can be actuated by electromagnetic control, which is more convenient for control. In addition, by setting a manual knob at the electromagnetic coil of the third reversing valve 3 and / or the second reversing valve 2 and / or the first unloading valve 4, the valve core position of the third reversing valve 3 and / or the second reversing valve 2 and / or the first unloading valve 4 can be manually controlled by the manual knob, and manual reversing can be performed. When the integrated valve group fails or the system is under maintenance, the reversing can be adjusted by unauthorized control of the manual knob, which is convenient for troubleshooting and improves the safety of system use.

[0055] Alternatively, if Figure 1 and Figure 4 As shown, the integrated valve group further includes a first control liquid port P4 and a second control liquid port P5 provided on the valve body 10 , and the first control liquid port P4 and the second control liquid port P5 are respectively connected to the liquid control ports at both ends of the first reversing valve 1 .

[0056] Specifically, the first reversing valve 1 is a hydraulically controlled reversing valve, which is suitable for connecting and regulating a high-power actuator, such as being connected to a swing cylinder of a concrete pump truck. The first control liquid port P4 and the second control liquid port P5 can be connected to a control liquid pipeline, such as controlling a hydraulic oil pipeline to connect to an external manual valve, thereby regulating the first reversing valve 1.

[0057] In this embodiment, by integrating the first control liquid port P4 and the second control liquid port P5 on the valve body 10, an external manual valve can be connected through the first control liquid port P4 and the second control liquid port P5 to perform switching control on the first reversing valve 1. Furthermore, when the third reversing valve 3 connected to the first reversing valve 1 fails, or the third reversing valve 3 as the solenoid reversing valve encounters an electrical blockage, the first reversing valve 1 can be switched through the external manual valve connected to the first control liquid port P4 and the second control liquid port P5. This will not affect the normal operation of the actuator connected to the first reversing valve 1, thereby making the system operation more stable and safe.

[0058] Alternatively, if Figure 1 , Figure 3 and Figure 4 As shown, the integrated valve group also includes a damper 9 and a pressure measuring port arranged on the valve body 10, the damper 9 is connected between the accumulator liquid port P3 and the first unloading valve 4, and the pressure measuring port is connected to the pipeline connected to the liquid inlet.

[0059] Specifically, the damper 9 is a damping hole structure arranged on the pipeline, which reduces the flow rate and alleviates the impact by reducing the pipeline aperture, thereby improving safety. More specifically, the pressure measuring port includes a first pressure measuring port M1 and a second pressure measuring port M2. The first pressure measuring port M1 is connected to the pipeline connected to the first liquid inlet P1, and the second pressure measuring port M2L is connected to the pipeline connected to the second liquid inlet P2. Pressure sensors can be respectively arranged at the first pressure measuring port M1 and the second pressure measuring port M2 to measure pressure, and the system can be pressure-regulated in real time through real-time data. The systems connected to the first liquid inlet P1 and the second liquid inlet P2 can be pressure-measured and adjusted respectively, further improving the overall safety of the system.

[0060] In this embodiment, by arranging a damper 9 on the valve body 10 and connecting the damper 9 between the accumulator liquid port P3 and the first unloading valve 4, when the accumulator connected to the accumulator liquid port P3 is unloaded through the first unloading valve 4, the damper 9 can avoid excessive impact on the first unloading valve 4 when the accumulator is unloaded, thereby improving the overall safety of use, and by arranging a pressure measuring port on the valve body 10 and connecting it to the liquid inlet, the working fluid pressure in the system can be measured by connecting, for example, a pressure sensor through the pressure measuring port, and the system can be adjusted according to the real-time pressure, thereby further ensuring the safety of system use.

[0061] In addition, another embodiment of the present invention provides an engineering machine, comprising the above-mentioned integrated valve group.

[0062] Exemplarily, the engineering machinery is a concrete pump truck, and the hydraulic transmission system on the concrete pump truck includes a hydraulic pump, an oil tank, a swing cylinder, a mixing hydraulic motor, an accumulator and the above-mentioned integrated valve group, the first liquid inlet P1 and the second liquid inlet P2 of the integrated valve group are both connected to the hydraulic pump, the first working liquid port A1 and the second working liquid port B1 of the integrated valve group are connected to the swing cylinder, the third working liquid port A2 and the fourth working liquid port B2 are connected to the mixing hydraulic motor, the first liquid outlet T1 and the second liquid outlet T2 of the integrated valve group are connected to the oil tank, the hydraulic pump drives the hydraulic oil to flow through the first reversing valve 1, and the first reversing valve 1 is adjusted to allow the hydraulic oil to flow from port A or port B. Into the first working fluid port A1 or the second working fluid port B1, and then by adjusting the first reversing valve 1, the reversing of the swing cylinder can be controlled. Similarly, the A port and the B port of the second reversing valve 2 can be connected to the third working fluid port A2 and the fourth working fluid port B2, and then by adjusting the second reversing valve 2, the forward and reverse rotation of the mixing hydraulic motor can be controlled, and the accumulator fluid port P3 of the integrated valve group is connected to the accumulator, and the accumulator accumulates hydraulic oil through the accumulator fluid port P3. When the concrete pump truck is in standby or the operation is completed, the accumulator is unloaded by adjusting the first unloading valve 4 of the integrated valve group, and the hydraulic oil flows back to the oil tank through the second liquid outlet T2.

[0063] Of course, the concrete pump truck may also be other engineering machinery, which is not specifically limited here.

[0064] In this embodiment, by applying the above-mentioned integrated valve group in engineering machinery, the technical effect thereof is substantially the same as the technical effect of the above-mentioned integrated valve group, and will not be described in detail here.

[0065] Although the utility model is disclosed as above, the protection scope of the utility model is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. An integrated valve group, characterized in that: The invention comprises a valve body (10) and a first reversing valve (1), a second reversing valve (2), a first unloading valve (4), a liquid inlet, a liquid outlet, an accumulator liquid port (P3) and a plurality of working liquid ports, the P port of the first reversing valve (1) and the P port of the second reversing valve (2) being both connected to the liquid inlet, the T port of the first reversing valve (1) and the T port of the second reversing valve (2) being both connected to the liquid outlet, and the A port and the B port of the first reversing valve (1) and the A port and the B port of the second reversing valve (2) being respectively connected to the working liquid ports, the liquid inlet end of the first unloading valve (4) being connected to the accumulator liquid port (P3), the liquid outlet end of the first unloading valve (4) being connected to the liquid outlet, and the accumulator liquid port (P3) being connected to the liquid inlet.

2. The integrated valve group according to claim 1, characterized in that: The valve body (10) further comprises a third reversing valve (3) arranged on the valve body (10), wherein the third reversing valve (3) is an electromagnetic reversing valve, the first reversing valve (1) is a hydraulically controlled reversing valve, the P port of the third reversing valve (3) is connected to the liquid inlet, the T port of the third reversing valve (3) is connected to the liquid outlet, and the A port and the B port of the third reversing valve (3) are respectively connected to the hydraulically controlled ports at both ends of the first reversing valve (1).

3. The integrated valve group according to claim 2, characterized in that: The liquid inlet comprises a first liquid inlet (P1) and a second liquid inlet (P2), and the liquid outlet comprises a first liquid outlet (T1) and a second liquid outlet (T2), the first liquid inlet (P1) being respectively connected to the P port of the first reversing valve (1) and the P port of the third reversing valve (3), the second liquid inlet (P2) being connected to the P port of the second reversing valve (2), the first liquid outlet (T1) being connected to the T port of the first reversing valve (1), the second liquid outlet (T2) being respectively connected to the T port of the second reversing valve (2), the T port of the third reversing valve (3) and the liquid outlet end of the first unloading valve (4), and the accumulator liquid port (P3) being connected to the first liquid inlet (P1).

4. The integrated valve group according to claim 3, characterized in that: It also includes a second unloading valve (5) and a liquid drain port (T3) respectively arranged on the valve body (10), wherein the liquid inlet end of the second unloading valve (5) is connected to the first liquid inlet port (P1), and the liquid outlet end of the second unloading valve (5) is connected to the liquid drain port (T3).

5. The integrated valve group according to claim 4, characterized in that: The invention also comprises a one-way valve (6) arranged on the valve body (10), wherein the liquid inlet end of the one-way valve (6) is connected to the first liquid inlet port (P1), and the liquid outlet end of the one-way valve (6) is respectively connected to the P port of the first reversing valve (1), the P port of the third reversing valve (3) and the accumulator liquid port (P3), and the one-way valve (6) is connected between the second unloading valve (5) and the accumulator liquid port (P3).

6. The integrated valve assembly according to claim 4, characterized in that: It also includes a first overflow valve (7) arranged on the valve body (10), wherein the liquid inlet end of the first overflow valve (7) is connected to the first liquid inlet (P1), and the overflow end of the first overflow valve (7) is connected to the liquid drain port (T3); And / or, it also includes a second overflow valve (8) arranged on the valve body (10), the liquid inlet end of the second overflow valve (8) is connected to the second liquid inlet (P2), and the overflow end of the second overflow valve (8) is connected to the second liquid outlet (T2).

7. The integrated valve assembly according to claim 2, characterized in that: The invention also comprises a manual knob (11), wherein the first unloading valve (4) is a solenoid valve, and the second reversing valve (2) is a solenoid reversing valve. The manual knob (11) is arranged on the valve body (10) and is located at the solenoid coil of the third reversing valve (3) and / or the second reversing valve (2) and / or the first unloading valve (4), and is used for manually adjusting the valve core position of the third reversing valve (3) and / or the second reversing valve (2) and / or the first unloading valve (4).

8. The integrated valve assembly according to claim 2, characterized in that: It also includes a first control liquid port (P4) and a second control liquid port (P5) arranged on the valve body (10), and the first control liquid port (P4) and the second control liquid port (P5) are respectively connected to the liquid control ports at both ends of the first reversing valve (1).

9. The integrated valve assembly according to claim 1, characterized in that: It also includes a damper (9) and a pressure measuring port arranged on the valve body (10), wherein the damper (9) is connected between the accumulator liquid port (P3) and the first unloading valve (4), and the pressure measuring port is connected to a pipeline connected to the liquid inlet.

10. An engineering machine, characterized in that: Comprising the integrated valve group according to any one of claims 1 to 9.

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