阅读说明：本技术 一种液压控制阀组和液压阀控缸系统 (Hydraulic control valve group and hydraulic valve cylinder control system ) 是由 杨永立 张文全 刘丹 李俊 刘延龙 邓亮 华宁 苏荣荣 谢建云 李乐超 陈瑶 于 2020-04-03 设计创作，主要内容包括：本申请提供一种液压控制阀组和液压阀控缸系统。液压控制阀组包括：液压油导通模块,与油箱连接,用于导通液压油；液压锁模块,与所述液压油导通模块和液压油缸分别连接,用于在所述液压油导通模块的不同导通情况下锁定液压油缸；回油模块,与所述液压锁模块和所述油箱分别连接,用于在所述油箱不供油或者供油量不足时使所述液压油缸回油。该液压控制阀组提高了液压油缸的回油效果。(The application provides a hydraulic control valve group and a hydraulic valve cylinder control system. The hydraulic control valve group includes: the hydraulic oil conducting module is connected with the oil tank and used for conducting hydraulic oil; the hydraulic lock module is respectively connected with the hydraulic oil conduction module and the hydraulic oil cylinder and is used for locking the hydraulic oil cylinder under different conduction conditions of the hydraulic oil conduction module; and the oil return module is respectively connected with the hydraulic lock module and the oil tank and is used for returning oil to the hydraulic oil cylinder when the oil tank is not supplied with oil or the oil supply is insufficient. This hydraulic control valves has improved hydraulic cylinder's oil return effect.)

1. A hydraulic control valve group, comprising:

the hydraulic oil conducting module is connected with the oil tank and used for conducting hydraulic oil;

the hydraulic lock module is respectively connected with the hydraulic oil conduction module and the hydraulic oil cylinder and is used for locking the hydraulic oil cylinder under different conduction conditions of the hydraulic oil conduction module;

and the oil return module is respectively connected with the hydraulic lock module and the oil tank and is used for returning oil to the hydraulic oil cylinder when the oil tank is not supplied with oil.

2. The hydraulic control valve block of claim 1, wherein the hydraulic oil conducting module comprises:

the oil port P and the oil port T of the two-position four-way electromagnetic reversing valve are both connected with the oil tank; the first oil inlet of the first shuttle valve and the first oil inlet of the second shuttle valve are both connected with the oil port B of the two-position four-way electromagnetic directional valve;

the hydraulic lock module includes:

the hydraulic control system comprises a first hydraulic control one-way valve and a second hydraulic control one-way valve, wherein a pilot oil port of the first hydraulic control one-way valve is connected with an oil outlet of the first shuttle valve, an oil inlet of the first hydraulic control one-way valve is connected with a second oil inlet of the second shuttle valve, and an oil outlet of the first hydraulic control one-way valve is connected with a rod cavity of the hydraulic oil cylinder; a pilot oil port of the second hydraulic control one-way valve is connected with an oil outlet of the second shuttle valve, an oil inlet of the second hydraulic control one-way valve is connected with a second oil inlet of the first shuttle valve, and an oil outlet of the second hydraulic control one-way valve is connected with a rodless cavity of the hydraulic oil cylinder;

the first oil outlet of the oil return module is connected with the oil inlet of the first hydraulic control one-way valve, the second oil outlet of the oil return module is connected with the oil inlet of the second hydraulic control one-way valve, and the oil inlet of the oil return module is connected with the oil tank.

3. The hydraulic control valve manifold of claim 2, wherein the oil return module comprises:

an oil port A of the three-position four-way electromagnetic reversing valve is connected with an oil inlet of the second hydraulic control one-way valve, and an oil port B of the three-position four-way electromagnetic reversing valve is connected with an oil inlet of the first hydraulic control one-way valve; and an oil port P and an oil port T of the three-position four-way electromagnetic directional valve are both connected with the oil tank.

4. The hydraulic control valve manifold of claim 2, wherein the oil return module comprises:

the three-position four-way electromagnetic reversing valve comprises a three-position four-way electromagnetic reversing valve, a first throttling valve and a second throttling valve;

one end of the first throttling valve is connected with an oil inlet of the second hydraulic control one-way valve, and one end of the second throttling valve is connected with an oil inlet of the first hydraulic control one-way valve; the other end of the first throttling valve is connected with an oil port A of the three-position four-way electromagnetic reversing valve, and the other end of the second throttling valve is connected with an oil port B of the three-position four-way electromagnetic reversing valve; and an oil port P and an oil port T of the three-position four-way electromagnetic directional valve are both connected with the oil tank.

5. The set of hydraulic control valves of claim 3 or 4, wherein the three-position four-way electromagnetic directional valve is a three-position four-way Y-type functional electromagnetic directional valve.

6. The hydraulic control valve manifold of claim 2, wherein the oil return module comprises:

an oil port A of the three-position four-way proportional reversing valve is connected with an oil inlet of the second hydraulic control one-way valve, and an oil port B of the three-position four-way proportional reversing valve is connected with an oil inlet of the first hydraulic control one-way valve; and an oil port P and an oil port T of the three-position four-way proportional reversing valve are both connected with the oil tank.

7. A hydraulic valve cylinder control system, comprising:

the hydraulic control system comprises an oil tank, a hydraulic oil cylinder and a hydraulic control valve group;

wherein, the hydraulic control valve group includes:

the hydraulic oil conducting module is connected with the oil tank and used for conducting hydraulic oil;

the hydraulic lock module is respectively connected with the hydraulic oil conduction module and the hydraulic oil cylinder and used for locking the hydraulic oil cylinder under different conduction conditions of the hydraulic oil conduction module;

and the oil return module is respectively connected with the hydraulic lock module and the oil tank and is used for returning oil to the hydraulic oil cylinder when the oil tank is not supplied with oil.

8. The hydraulic cylinder control system of claim 7, wherein the hydraulic oil conduction module comprises:

the oil port P and the oil port T of the two-position four-way electromagnetic reversing valve are both connected with the oil tank; the first oil inlet of the first shuttle valve and the first oil inlet of the second shuttle valve are both connected with the oil port B of the two-position four-way electromagnetic directional valve;

the hydraulic lock module includes:

the hydraulic control system comprises a first hydraulic control one-way valve and a second hydraulic control one-way valve, wherein a pilot oil port of the first hydraulic control one-way valve is connected with an oil outlet of the first shuttle valve, an oil inlet of the first hydraulic control one-way valve is connected with a second oil inlet of the second shuttle valve, and an oil outlet of the first hydraulic control one-way valve is connected with a rod cavity of the hydraulic oil cylinder; a pilot oil port of the second hydraulic control one-way valve is connected with an oil outlet of the second shuttle valve, an oil inlet of the second hydraulic control one-way valve is connected with a second oil inlet of the first shuttle valve, and an oil outlet of the second hydraulic control one-way valve is connected with a rodless cavity of the hydraulic oil cylinder;

the first oil outlet of the oil return module is connected with the oil inlet of the first hydraulic control one-way valve, the second oil outlet of the oil return module is connected with the oil inlet of the second hydraulic control one-way valve, and the oil inlet of the oil return module is connected with the oil tank.

9. The hydraulic cylinder control system of claim 7, comprising a plurality of said hydraulic rams and a plurality of said sets of hydraulic control valves; the number of the hydraulic oil cylinders is the same as that of the hydraulic control valve groups;

each hydraulic control valve group is connected with one hydraulic oil cylinder, and the hydraulic control valve groups connected with different hydraulic oil cylinders are connected with the oil tank.

10. The hydraulic valve cylinder control system of claim 9, wherein the number of hydraulic rams and the number of hydraulic control valve banks are both 4.

Technical Field

The application relates to the technical field of automatic control, in particular to a hydraulic control valve group and a hydraulic valve cylinder control system.

Background

In a general hydraulic control valve group, the hydraulic control valve group comprises a hydraulic lock module, and under the condition that different oil ways are communicated, the hydraulic lock module can lock a hydraulic oil cylinder. However, the hydraulic rams also require oil to be supplied to their unloaded chambers when they fall back under load. By adopting a common hydraulic control valve group, when the system does not supply oil, the hydraulic oil cylinder cannot fall back under the action of load; when the oil supply flow is small, the falling speed of the hydraulic oil cylinder is slow.

Therefore, under the control of the existing hydraulic control valve group, the oil return effect of the hydraulic oil cylinder is poor.

Disclosure of Invention

An object of the embodiment of the application is to provide a hydraulic control valve group and a hydraulic control cylinder system, which are used for improving the oil return effect of a hydraulic oil cylinder.

In a first aspect, an embodiment of the present application provides a hydraulic control valve group, including: the hydraulic oil conducting module is connected with the oil tank and used for conducting hydraulic oil; the hydraulic lock module is respectively connected with the hydraulic oil conduction module and the hydraulic oil cylinder and is used for locking the hydraulic oil cylinder under different conduction conditions of the hydraulic oil conduction module; and the oil return module is respectively connected with the hydraulic lock module and the oil tank and is used for returning oil to the hydraulic oil cylinder when the oil tank is not supplied with oil or the oil supply is insufficient.

In the embodiment of the application, the hydraulic control valve group comprises a hydraulic oil conducting module and an oil return module besides a hydraulic lock module, and the hydraulic oil cylinder can be locked under the condition of conducting different oil paths by matching the hydraulic oil conducting module and the hydraulic lock module; through the cooperation of the hydraulic oil conduction module, the hydraulic lock module and the oil return module, the automatic oil return of the hydraulic oil cylinder when the oil tank is not supplied with oil or the oil supply amount is insufficient can be realized, and the oil return effect of the hydraulic oil cylinder is further improved.

As a possible implementation manner, the hydraulic oil conducting module includes: the oil port P and the oil port T of the two-position four-way electromagnetic reversing valve are both connected with the oil tank; the first oil inlet of the first shuttle valve and the first oil inlet of the second shuttle valve are both connected with the oil port B of the two-position four-way electromagnetic directional valve; the hydraulic lock module includes: the hydraulic control system comprises a first hydraulic control one-way valve and a second hydraulic control one-way valve, wherein a pilot oil port of the first hydraulic control one-way valve is connected with an oil outlet of the first shuttle valve, an oil inlet of the first hydraulic control one-way valve is connected with a second oil inlet of the second shuttle valve, and an oil outlet of the first hydraulic control one-way valve is connected with a rod cavity of the hydraulic oil cylinder; a pilot oil port of the second hydraulic control one-way valve is connected with an oil outlet of the second shuttle valve, an oil inlet of the second hydraulic control one-way valve is connected with a second oil inlet of the first shuttle valve, and an oil outlet of the second hydraulic control one-way valve is connected with a rodless cavity of the hydraulic oil cylinder; the first oil outlet of the oil return module is connected with the oil inlet of the first hydraulic control one-way valve, the second oil outlet of the oil return module is connected with the oil inlet of the second hydraulic control one-way valve, and the oil inlet of the oil return module is connected with the oil tank.

In the embodiment of the application, through the two-position four-way electromagnetic directional valve, when the electromagnetic directional valve is positioned at different positions, different oil way conduction can be realized, the hydraulic lock module comprises a first hydraulic control one-way valve and a second hydraulic control one-way valve, under the condition that different oil ways are conducted, the two hydraulic control one-way valves have different conduction conditions, and the hydraulic oil cylinder is locked under different conduction conditions; and through the cooperation of first hydraulically controlled check valve and second hydraulically controlled check valve and oil return module, realize the automatic oil return of hydraulic cylinder when not enough or not supplying oil. On the premise of ensuring the self-locking function, the automatic oil return of the hydraulic oil cylinder is realized.

As a possible implementation, the oil return module includes: an oil port A of the three-position four-way electromagnetic reversing valve is connected with an oil inlet of the second hydraulic control one-way valve, and an oil port B of the three-position four-way electromagnetic reversing valve is connected with an oil inlet of the first hydraulic control one-way valve; and an oil port P and an oil port T of the three-position four-way electromagnetic directional valve are both connected with the oil tank.

In the embodiment of the application, the oil return module can realize oil return through different oil path conduction conditions of the three-position four-way electromagnetic directional valve and the conduction condition between the two hydraulic control one-way valves.

As a possible implementation, the oil return module includes: the three-position four-way electromagnetic reversing valve comprises a three-position four-way electromagnetic reversing valve, a first throttling valve and a second throttling valve; one end of the first throttling valve is connected with an oil inlet of the second hydraulic control one-way valve, and one end of the second throttling valve is connected with an oil inlet of the first hydraulic control one-way valve; the other end of the first throttling valve is connected with an oil port A of the three-position four-way electromagnetic reversing valve, and the other end of the second throttling valve is connected with an oil port B of the three-position four-way electromagnetic reversing valve; and an oil port P and an oil port T of the three-position four-way electromagnetic directional valve are both connected with the oil tank.

In this application embodiment, can also set up the choke valve, flow size when can adjusting the oil return through the choke valve, and then control oil return speed.

As a possible implementation manner, the three-position four-way electromagnetic directional valve is a three-position four-way Y-shaped functional electromagnetic directional valve.

Through the Y-shaped functional electromagnetic directional valve, the stability is relatively stable, and the stability of system operation is further improved.

As a possible implementation, the oil return module includes: an oil port A of the three-position four-way proportional reversing valve is connected with an oil inlet of the second hydraulic control one-way valve, and an oil port B of the three-position four-way proportional reversing valve is connected with an oil inlet of the first hydraulic control one-way valve; and an oil port P and an oil port T of the three-position four-way proportional reversing valve are both connected with the oil tank.

In this application embodiment, the oil return module can also realize the oil return through the oil circuit condition of switching on of three-position four-way proportional reversing valve and the condition of switching on between two liquid accuse check valves to, proportional reversing valve can also adjust the flow, and then control oil return speed.

In a second aspect, an embodiment of the present application provides a hydraulic valve cylinder control system, including: the hydraulic control system comprises an oil tank, a hydraulic oil cylinder and a hydraulic control valve group; wherein, the hydraulic control valve group includes: the hydraulic oil conducting module is connected with the oil tank and used for conducting hydraulic oil; the hydraulic lock module is connected with the hydraulic oil conduction module and the hydraulic oil cylinder and used for locking the hydraulic oil cylinder under different conduction conditions of the hydraulic oil conduction module; and the oil return module is respectively connected with the hydraulic lock module and the oil tank and is used for returning oil to the hydraulic oil cylinder when the oil tank is not supplied with oil.

In the embodiment of the application, a hydraulic control valve group is arranged in a hydraulic valve cylinder control system, the hydraulic control valve group comprises a hydraulic oil conducting module and an oil return module besides a hydraulic lock module, and the hydraulic oil cylinder can be locked under the conduction conditions of different oil paths through the matching of the hydraulic oil conducting module and the hydraulic lock module; through the cooperation of the hydraulic oil conduction module, the hydraulic lock module and the oil return module, the automatic oil return of the hydraulic oil cylinder when the oil tank is not supplied with oil or the oil supply amount is insufficient can be realized, and the oil return effect of the hydraulic oil cylinder in the system is further improved.

As a possible implementation manner, the hydraulic oil conducting module includes: the oil port P and the oil port T of the two-position four-way electromagnetic reversing valve are both connected with the oil tank; the first oil inlet of the first shuttle valve and the first oil inlet of the second shuttle valve are both connected with the oil port B of the two-position four-way electromagnetic directional valve; the hydraulic lock module includes: the hydraulic control system comprises a first hydraulic control one-way valve and a second hydraulic control one-way valve, wherein a pilot oil port of the first hydraulic control one-way valve is connected with an oil outlet of the first shuttle valve, an oil inlet of the first hydraulic control one-way valve is connected with a second oil inlet of the second shuttle valve, and an oil outlet of the first hydraulic control one-way valve is connected with a rod cavity of the hydraulic oil cylinder; a pilot oil port of the second hydraulic control one-way valve is connected with an oil outlet of the second shuttle valve, an oil inlet of the second hydraulic control one-way valve is connected with a second oil inlet of the first shuttle valve, and an oil outlet of the second hydraulic control one-way valve is connected with a rodless cavity of the hydraulic oil cylinder; the first oil outlet of the oil return module is connected with the oil inlet of the first hydraulic control one-way valve, the second oil outlet of the oil return module is connected with the oil inlet of the second hydraulic control one-way valve, and the oil inlet of the oil return module is connected with the oil tank.

As a possible implementation manner, the hydraulic valve cylinder control system comprises a plurality of hydraulic oil cylinders and a plurality of hydraulic control valve groups; the number of the hydraulic oil cylinders is the same as that of the hydraulic control valve groups; each hydraulic control valve group is connected with one hydraulic oil cylinder, and the hydraulic control valve groups connected with different hydraulic oil cylinders are connected with the oil tank.

In the embodiment of the application, when a plurality of hydraulic oil cylinders are arranged, a plurality of hydraulic control valve groups can be arranged to respectively control the hydraulic oil cylinders, so that the oil return effect of each hydraulic oil cylinder in the system is improved.

As a possible implementation manner, the number of the hydraulic oil cylinders and the number of the hydraulic control valve banks are both 4.

In this application embodiment, hydraulic cylinder's quantity is 4, and the quantity of hydraulic control valves also corresponds to be 4, improves each hydraulic cylinder's in the system oil return effect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

FIG. 1 is a schematic structural diagram of a hydraulic cylinder control system according to an embodiment of the present disclosure;

FIG. 2 is an exemplary schematic diagram of a hydraulic cylinder control system provided in an embodiment of the present application.

Icon: 10-hydraulic valve cylinder control system; 11-a fuel tank; 12-a hydraulic oil cylinder; 13-hydraulic control valve group; 130-hydraulic oil conducting module; 131-a hydraulic lock module; 132-oil return module.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

Referring to fig. 1, which is a schematic structural diagram of a hydraulic cylinder control system 10 according to an embodiment of the present application, the hydraulic cylinder control system 10 includes: an oil tank 11, a hydraulic oil cylinder 12 and a hydraulic control valve group 13.

Wherein, hydraulic control valve group 13 includes: a hydraulic oil conducting module 130, a hydraulic lock module 131 and an oil return module 132. And the hydraulic oil conducting module 130 is connected with the oil tank 11 and used for conducting hydraulic oil. And the hydraulic lock module 131 is connected with the hydraulic oil conduction module 130 and the hydraulic oil cylinder 12 respectively, and is used for locking the hydraulic oil cylinder 12 under different conduction conditions of the hydraulic oil conduction module 130. And the oil return module 132 is connected with the hydraulic lock module 131 and the oil tank 11 respectively and used for returning oil to the hydraulic oil cylinder 12 when the oil tank 11 is not supplied with oil.

In the embodiment of the present application, a hydraulic control valve group 13 is arranged in the hydraulic control cylinder system 10, the hydraulic control valve group 13 includes a hydraulic oil conducting module 130 and an oil return module 132 in addition to a hydraulic lock module 131, and locking of the hydraulic oil cylinder 12 under different oil path conducting conditions can be realized through cooperation of the hydraulic oil conducting module 130 and the hydraulic lock module 131; through the cooperation of the hydraulic oil conduction module 130, the hydraulic lock module 131 and the oil return module 132, the automatic oil return of the hydraulic oil cylinder 12 when the oil tank 11 does not supply oil or the oil supply amount is insufficient can be realized, and the oil return effect of the hydraulic oil cylinder 12 in the system is further improved.

Next, embodiments of the respective functional blocks in the hydraulic control valve group 13 will be described.

For the hydraulic oil conducting module 130, it may include: the two-position four-way electromagnetic reversing valve comprises a two-position four-way electromagnetic reversing valve, a first shuttle valve and a second shuttle valve. The two-position four-way electromagnetic directional valve comprises four oil ports (an oil port P, an oil port T, an oil port A and an oil port B), and the valve core of the two-position four-way electromagnetic directional valve can realize switching between two positions (a left position and a right position). When the two-position four-way electromagnetic reversing valve is in different positions, the conduction conditions of the four oil ports are correspondingly changed, for example, when the two-position four-way electromagnetic reversing valve is in the left position, the oil port P is conducted with the oil port B; when the two-position four-way electromagnetic directional valve is in the right position, the oil port T is communicated with the oil port A. The first shuttle valve and the second shuttle valve respectively comprise three oil ports, wherein two oil inlets and one oil outlet. Further, an oil port P and an oil port T of the two-position four-way electromagnetic directional valve are both connected with the oil tank 11; and a first oil inlet of the first shuttle valve and a first oil inlet of the second shuttle valve are connected with an oil port B of the two-position four-way electromagnetic directional valve.

For the hydraulic lock module 131, a first pilot operated check valve and a second pilot operated check valve are included. The hydraulic control one-way valve comprises three oil ports (a pilot oil port, an oil inlet and an oil outlet). Normally, hydraulic oil can only flow from the oil inlet to the oil outlet, but when the pilot oil port has high-pressure oil, the oil inlet and the oil outlet can be forced to be communicated. Furthermore, a pilot oil port of the first hydraulic control one-way valve is connected with an oil outlet of the first shuttle valve, an oil inlet of the first hydraulic control one-way valve is connected with a second oil inlet of the second shuttle valve, and an oil outlet of the first hydraulic control one-way valve is connected with a rod cavity of the hydraulic oil cylinder 12; a pilot oil port of the second hydraulic control one-way valve is connected with an oil outlet of the second shuttle valve, an oil inlet of the second hydraulic control one-way valve is connected with a second oil inlet of the first shuttle valve, and an oil outlet of the second hydraulic control one-way valve is connected with a rodless cavity of the hydraulic oil cylinder 12.

For the oil return module 132, an oil inlet thereof is connected to the oil tank 11, a first oil outlet of the oil return module 132 is connected to an oil inlet of the first hydraulic control one-way valve, and a second oil outlet of the oil return module 132 is connected to an oil inlet of the second hydraulic control one-way valve.

In the embodiment of the application, through the two-position four-way electromagnetic directional valve, when the electromagnetic directional valve is located at different positions, different oil path conduction can be realized, the hydraulic lock module 131 comprises a first hydraulic control one-way valve and a second hydraulic control one-way valve, so that the two hydraulic control one-way valves have different conduction conditions under different oil path conduction conditions, and further the hydraulic oil cylinder 12 is locked under different conduction conditions; and the first hydraulic control one-way valve, the second hydraulic control one-way valve and the oil return module 132 are matched to realize automatic oil return of the hydraulic oil cylinder 12 when the oil supply is insufficient or not supplied. On the premise of ensuring the self-locking function, the automatic oil return of the hydraulic oil cylinder 12 is realized.

Further, for the oil return module 132, the embodiment of the present application provides three alternative implementations.

In a first alternative embodiment, the oil return module 132 includes: three-position four-way electromagnetic directional valve. The three-position four-way electromagnetic reversing valve comprises four oil ports (an oil port P, an oil port T, an oil port A and an oil port B) and three positions (a left position, a right position and a middle position), and when the three-position four-way electromagnetic reversing valve is in different position conditions, the conduction conditions of the four oil ports are correspondingly changed, for example, when the three-position four-way electromagnetic reversing valve is in the left position, the oil port P is conducted with the oil port B; when the three-position four-way electromagnetic directional valve is in the right position, the oil port T is communicated with the oil port A; when the three-position four-way electromagnetic directional valve is in the middle position, the oil port T is communicated with the oil ports A and B. Furthermore, an oil port A of the three-position four-way electromagnetic reversing valve is connected with an oil inlet of the second hydraulic control one-way valve, and an oil port B of the three-position four-way electromagnetic reversing valve is connected with an oil inlet of the first hydraulic control one-way valve; an oil port P and an oil port T of the three-position four-way electromagnetic directional valve are both connected with the oil tank 11.

In this embodiment, the oil return module 132 can return oil through different oil passage conduction conditions of the three-position four-way electromagnetic directional valve and the conduction condition between the two hydraulic control check valves.

In a second alternative embodiment, the oil return module 132 includes: the three-position four-way electromagnetic reversing valve comprises a three-position four-way electromagnetic reversing valve, a first throttling valve and a second throttling valve. The throttle valve is a valve for regulating flow, and may be a one-way throttle valve. Furthermore, one end of the first throttling valve is connected with an oil inlet of the second hydraulic control one-way valve, and one end of the second throttling valve is connected with an oil inlet of the first hydraulic control one-way valve; the other end of the first throttling valve is connected with an oil port A of the three-position four-way electromagnetic reversing valve, and the other end of the second throttling valve is connected with an oil port B of the three-position four-way electromagnetic reversing valve; an oil port P and an oil port T of the three-position four-way electromagnetic directional valve are both connected with the oil tank 11.

In this application embodiment, can also set up the choke valve, flow size when can adjusting the oil return through the choke valve, and then control oil return speed.

In the two embodiments, the three-position four-way electromagnetic directional valve can be a three-position four-way Y-shaped functional electromagnetic directional valve. Through the Y-shaped functional electromagnetic directional valve, the stability is relatively stable, and the stability of system operation is further improved.

In a third alternative embodiment, the oil return module 132 includes: a three-position four-way proportional reversing valve. The three-position four-way proportional reversing valve has the functions of a three-position four-way electromagnetic reversing valve, and can also control the flow of hydraulic oil through input signals, and the three-position four-way proportional reversing valve is equivalent to the functions of the three-position four-way electromagnetic reversing valve and a throttle valve. Furthermore, an oil port A of the three-position four-way proportional reversing valve is connected with an oil inlet of the second hydraulic control one-way valve, and an oil port B of the three-position four-way proportional reversing valve is connected with an oil inlet of the first hydraulic control one-way valve; and an oil port P and an oil port T of the three-position four-way proportional reversing valve are both connected with the oil tank 11.

In this embodiment, the oil return module 132 may further implement oil return through the oil path conduction condition of the three-position four-way proportional directional valve and the conduction condition between the two hydraulic control check valves, and the proportional directional valve may further adjust the flow rate to further control the oil return speed.

It is understood that there may be more than one hydraulic cylinder in hydraulic cylinder control system 10, and in this embodiment, hydraulic cylinder control system 10 includes a plurality of hydraulic cylinders 12 and a plurality of hydraulic control valve sets 13, and the number of hydraulic cylinders 12 is the same as the number of hydraulic control valve sets 13. For example, the number of hydraulic cylinders 12 and the number of hydraulic control valve sets 13 are both 4. Each hydraulic control valve group 13 is connected with one hydraulic oil cylinder 12, and the hydraulic control valve groups 13 connected with different hydraulic oil cylinders 12 are all connected with the oil tank 11.

In the embodiment of the present invention, when there are a plurality of hydraulic cylinders 12, a plurality of hydraulic control valve sets 13 may be provided to control the hydraulic cylinders 12, respectively, so as to improve the oil return effect of each hydraulic cylinder 12 in the system.

In order to facilitate understanding of the technical solutions provided in the embodiments of the present application, the following describes an implementation principle of the valve control cylinder system 10 with reference to a specific example.

Referring to fig. 2, an optional implementation structure of the hydraulic cylinder control system 10 according to the embodiment of the present disclosure is shown in fig. 2, in the structure shown in fig. 2, it is assumed that 4 hydraulic control valve groups 13 share one two-position four-way electromagnetic directional valve, and the oil return module 132 adopts a second implementation manner.

The system comprises the following components: the hydraulic control type electromagnetic reversing valve comprises a two-position four-way electromagnetic reversing valve I, a three-position four-way Y-shaped function electromagnetic reversing valve II, a one-way throttle valve III, a shuttle valve II, a hydraulic control one-way valve II, an oil cylinder II (namely a hydraulic oil cylinder 12) and an oil tank. The oil tank 11 is not shown in the figure, but is connected to the oil port P and the oil port T of the left two-position four-way electromagnetic directional valve (first) in fig. 2 according to the connection relationship, and is also connected to the oil port P and the oil port T of the three-position four-way Y-type functional electromagnetic directional valve (second) of each hydraulic control valve group 13.

Further, the shuttle valve (IV) comprises an oil port 1, an oil port 2 and an oil port 3. The oil ports 1 and 3 are oil inlets, which can be respectively understood as a first oil inlet and a second oil inlet in the foregoing embodiment, and the oil port 2 is an oil outlet. The hydraulic control check valve (c) includes an oil port 1, an oil port 2 and an oil port 3, wherein the oil port 1 is an oil outlet in the foregoing embodiment, the oil port 3 is a pilot oil port in the foregoing embodiment, and the oil port 2 is an oil inlet in the foregoing embodiment.

Further, an oil port P of the two-position (left position and right position) four-way electromagnetic directional valve (i) and the three-position (left position, right position and middle position) four-way Y-shaped functional electromagnetic directional valve (i) is a high-pressure (0-20Mpa) oil port, an oil port T is a low-pressure oil port, and the oil port a and the oil port B can be understood as an actuating mechanism (oil outlet or oil inlet).

Next, the flow of hydraulic oil in the whole system will be described under the condition that different oil paths of the two-position four-way electromagnetic directional valve (i) and the three-position four-way Y-shaped functional electromagnetic directional valve (ii) are communicated. In the description of the subsequent embodiment, the shuttle valve (r) and the pilot check valve (r) are both referred to as two valves because the operation principle of the two shuttle valves (r) or the pilot check valve (r) is the same, and only the connected cylinder chambers are different. Wherein, the oil cylinder cavity comprises a rod cavity and a rodless cavity, the rod cavity is a cavity above the oil cylinder in figure 2, and the rodless cavity is a cavity below the oil cylinder in figure 2.

In the first situation, when the two-position four-way electromagnetic directional valve is electrified to be in the left position, high-pressure oil flows from the oil port P to the oil port B of the two-position electromagnetic directional valve, the oil port A is communicated with the oil port T, and then the high-pressure oil acts on the pilot oil port 3 of the shuttle valve, so that the valve core of the shuttle valve is pushed to block the oil port 1 of the shuttle valve. Because the oil port 1 of the shuttle valve is closed, the high-pressure oil in the path can not enter the oil port 2 of the hydraulic control one-way valve through the oil port 1 of the shuttle valve, thereby avoiding the malfunction caused by the disorder on the oil path. The oil port 3 of the shuttle valve (IV) is communicated with the oil port 2, and high-pressure oil passes through the shuttle valve (IV) (namely the high-pressure oil reaches the oil port 2 from the oil port 3 of the shuttle valve (IV)) and acts on the pilot oil port 3 of the hydraulic control one-way valve (V), so that the hydraulic control one-way valve (V) is opened, and the oil port 1 of the hydraulic control one-way valve (V) is communicated with the oil port 2. The rodless cavity of the oil cylinder is connected with the oil port A of the three-position four-way electromagnetic reversing valve through the hydraulic control one-way valve and the one-way throttle valve, and the rod cavity of the oil cylinder is connected with the oil port B of the three-position four-way electromagnetic reversing valve through the hydraulic control one-way valve and the one-way throttle valve.

In the second situation, when the three-position four-way electromagnetic directional valve is powered off and is in the middle position, the oil port A, B is communicated with the oil port T, so that the rodless cavity and the rod cavity of the oil cylinder are respectively communicated with the oil port T of the three-position four-way electromagnetic directional valve through the oil port A, B of the three-position four-way electromagnetic directional valve II. At this time, under the action of the load force, a part of the hydraulic oil in the load cavity (rodless cavity or rod cavity) of the oil cylinder enters the non-load cavity of the oil cylinder, and a part of the hydraulic oil directly returns to the oil tank 11 through the oil port T of the three-position four-way electromagnetic directional valve II. Then the oil cylinder can automatically fall back by the load force under the condition that the system does not supply oil, and the falling speed can be realized by adjusting the one-way throttle valve.

In the third situation, when the two-position four-way electromagnetic directional valve is powered off and is positioned at the right position, the hydraulic oil of the oil port 3 of the shuttle valve returns to the oil port T through the oil port B of the two-position four-way electromagnetic directional valve, at the moment, if pressure oil acts on the oil port 1 of the shuttle valve, the pressure oil pushes the valve core of the shuttle valve to block the oil port 3 of the shuttle valve, so that the oil port 2 of the shuttle valve is communicated with the oil port 1, and at the moment, the hydraulic lock formed by the hydraulic control one-way valve is equivalent to a common hydraulic lock. At this time, if the three-position four-way electromagnetic change valve is powered off and is in the middle position, the hydraulic control one-way valve is closed and the oil cylinder is locked because the oil port 2 of the hydraulic control one-way valve is returned through the one-way throttle valve and the middle position of the electromagnetic change valve.

It can be seen from the above examples that, in the embodiment of the present application, the oil cylinder can automatically fall under the load when the two-position four-way electromagnetic directional valve is powered on and is in the left position, so that the problem that the oil cylinder still can fall back at a high speed under the load when the system is not supplied with oil or the oil supply flow is small is solved. Meanwhile, the traditional function of a hydraulic lock consisting of a hydraulic control one-way valve (c) is kept under the condition that the power failure position of the two-position four-way electromagnetic directional valve (c) is at the right position.

Through the technical scheme provided by the embodiment of the application, the operation time of the equipment can be greatly shortened, the flow and the consumed power required by a hydraulic system are reduced, and the effects of energy conservation and emission reduction are achieved.

In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.