High-precision integrated valve group for replacing stacked hydraulic control one-way valves

Abstract

The utility model discloses a high-precision integrated valve group for replacing a stacked hydraulic control one-way valve, which comprises an electro-hydraulic directional control valve, a stacked double one-way throttle valve is arranged below the electro-hydraulic directional control valve, a change-over valve block component is arranged below the stacked double one-way throttle valve, a plug-in logic valve and a plug-in electromagnetic valve are arranged, and the plug-in logic valve and the plug-in electromagnetic valve are connected with the electro-hydraulic directional control valve. The plug-in type logic valve and the plug-in type electromagnetic valve are used for replacing a hydraulic control one-way valve, and the loop has the advantages that the plug-in type reversing valve can control the logic valve to be closed and opened in an internal control or external control mode, the control mode is more stable, the leakage rate is smaller than that of the hydraulic control one-way valve, the position of an executing mechanism can be effectively controlled, and the plug-in type reversing valve is still installed in a stacked mode. A hydraulic loop is small in change, convenient to install, good in interchangeability, accurate in fixing position of an executing mechanism, small in valve set leakage amount, capable of keeping the position of the executing mechanism for a long time, capable of improving safety of a hydraulic system, capable of reducing cost of a valve block, high in integration and capable of reducing occupied space of the valve set.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic control equipment, in particular to a high-precision integrated valve group that replaces a superimposed hydraulically controlled one-way valve. Background Art

[0002] In the field of industrial automation, high-precision integrated valve groups are one of the important components for realizing automated control. By precisely controlling the opening and closing of valves, precise adjustment of parameters such as flow, pressure, and temperature of fluids or gases can be achieved, thereby ensuring the stability and efficiency of the production process. In hydraulic systems, high-precision integrated valve groups can achieve precise control of the flow and pressure of hydraulic oil, thereby ensuring the normal operation of machines or equipment. It can achieve precise control, regulation, and management of fluids, thereby improving production efficiency, ensuring equipment safety, and meeting specific needs. With the continuous advancement of science and technology and the continuous improvement of application needs, the application prospects of high-precision integrated valve groups will be broader.

[0003] The existing hydraulic lock valve group has the defects of large size, heavy weight, high maintenance cost, inconvenient disassembly, repair or cleaning;

[0004] The existing patent (publication number: CN206111713U) is a superimposed double hydraulic lock valve group, which includes: an integrated block and a first hydraulically controlled one-way valve and a second hydraulically controlled one-way valve; the two opposite end faces of the integrated block are each provided with a threaded hole, the first hydraulically controlled one-way valve and the second hydraulically controlled one-way valve are respectively threadedly connected to the threaded holes, the integrated block also has two opposite first mounting surfaces and a second mounting surface, the first mounting surface is provided with three oil inlets and one oil outlet, the second mounting surface is provided with three oil outlets and one oil inlet, the integrated block also includes four mounting holes, each mounting hole passes through the integrated block and connects the two mounting surfaces, the first hydraulically controlled one-way valve and the second hydraulically controlled one-way valve of this superimposed double hydraulic lock valve group are both threadedly connected to the integrated block, and the mounting hole passes through the integrated block, thereby facilitating the superimposed installation and disassembly of the double hydraulic lock valve group.

[0005] The existing patents provide solutions to the above problems. However, in some existing special hydraulic systems, the back pressure is too large, the load force is too small, and under negative load, it is found that the hydraulic hydraulic control one-way valve is opened by mistake, the actuator position moves, and the required accuracy cannot be achieved.

[0006] Therefore, a high-precision integrated valve group is proposed to replace the superimposed hydraulically controlled one-way valve. Summary of the invention

[0007] The purpose of the utility model is to provide a high-precision integrated valve group to replace the superimposed hydraulically controlled one-way valve, which can solve the problems of excessive back pressure, too small load force, negative load, etc. in some existing special hydraulic systems, and the hydraulic hydraulically controlled one-way valve is found to be opened by mistake, the actuator position moves, and the accuracy required for use cannot be achieved.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-precision integrated valve group replacing a stacked hydraulically controlled one-way valve, comprising an electro-hydraulic reversing valve, a stacked double one-way throttle valve is arranged below the electro-hydraulic reversing valve, and a conversion valve block assembly is arranged below the stacked double one-way throttle valve;

[0009] The conversion valve block assembly includes a cartridge logic valve and a cartridge solenoid valve, and the cartridge logic valve and the cartridge solenoid valve are both arranged below the superimposed double one-way throttle valve, and the electro-hydraulic reversing valve, the superimposed double one-way throttle valve, the cartridge logic valve and the cartridge solenoid valve are interconnected.

[0010] Preferably, the number of the cartridge logic valves is two groups, and the integrated valve group uses two cartridge logic valves to control the on-off of the oil circuit.

[0011] Preferably, the cartridge logic valve and the cartridge solenoid valve are connected to each other, and the cartridge solenoid valve is used to control the cartridge logic valve.

[0012] Preferably, the cartridge logic valve is an unbalanced cone valve structure, and the cartridge logic valve is a two-way switch unit and is in a closed state under spring bias.

[0013] Preferably, when the electro-hydraulic reversing valve loses power, the valve core return oil circuit of the plug-in logic valve is closed under the action of the spring force.

[0014] Preferably, when the plug-in logic valve is externally connected to drain oil, the valve always remains closed regardless of the pressure at the electro-hydraulic reversing valve and the superimposed double one-way throttle valve.

[0015] Preferably, the conversion valve block assembly can be used in conjunction with a DN16 diameter servo valve, which can effectively control the position of the actuator and maintain the locking position of the actuator for a long time.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. This application sets a cartridge logic valve and a cartridge solenoid valve to replace the hydraulically controlled one-way valve. The advantage of this circuit is that the cartridge reversing valve can control the closing and opening of the logic valve in the form of internal control or external control. The control method is more stable, the leakage is smaller than that of the hydraulically controlled one-way valve, and the position of the actuator can be effectively controlled. It is still installed in a stacking manner, the hydraulic circuit changes little, the installation is convenient, the interchangeability is good, the actuator fixes the position accurately, the valve group leaks little, the actuator can maintain its position for a long time, the safety of the hydraulic system is increased, the valve block cost is reduced, and it is highly integrated, which can reduce the space occupied by the valve group.

[0018] 2. This application sets a cartridge logic valve and a cartridge solenoid valve, and the extended state is subjected to high-speed heavy-load conditions with reverse loads. The load moves forward intermittently during the falling process, resulting in large impact and vibration problems. The hydraulically controlled one-way valve has leakage in the valve body itself. When it is simply locked by hydraulic pressure, the locking time is short and the locking accuracy is not high. There may be safety hazards in the long-term power-off state. In some circuits that require high-precision position maintenance, the hydraulically controlled one-way valve cannot meet their requirements. This valve group is highly integrated, which can effectively reduce the space occupied by the system valve group and reduce the cost of the valve block. This valve group can be used in conjunction with a DN16-diameter servo valve, which can effectively control the position of the actuator and maintain the locking position of the actuator for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is the overall structural view of the utility model;

[0021] Figure 2 This is a structural view of the utility model from the front;

[0022] Figure 3 This is a structural view of the utility model from the side;

[0023] Figure 4 This is a top view of the structure of the utility model;

[0024] Figure 5 It is a partial structural view of the electro-hydraulic reversing valve and the superimposed double one-way throttle valve of the utility model;

[0025] Figure 6 This is a working principle diagram of the utility model.

[0026] Description of reference numerals:

[0027] 1. Electro-hydraulic reversing valve; 2. Superimposed double one-way throttle valve; 3. Conversion valve block assembly; 301. Cartridge logic valve; 302. Cartridge solenoid valve. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figures 1 to 6 , the utility model provides a technical solution:

[0030] A high-precision integrated valve group replacing a stacked hydraulically controlled one-way valve comprises an electro-hydraulic reversing valve 1, a stacked double one-way throttle valve 2 is arranged below the electro-hydraulic reversing valve 1, and a conversion valve block assembly 3 is arranged below the stacked double one-way throttle valve 2;

[0031] The conversion valve block assembly 3 includes a cartridge logic valve 301 and a cartridge solenoid valve 302. The cartridge logic valve 301 and the cartridge solenoid valve 302 are both arranged below the superimposed double one-way throttle valve 2. The electro-hydraulic reversing valve 1, the superimposed double one-way throttle valve 2, the cartridge logic valve 301 and the cartridge solenoid valve 302 are interconnected.

[0032] By setting up a cartridge logic valve 301 and a cartridge solenoid valve 302, the cartridge logic valve 301 and the cartridge solenoid valve 302 are used to replace the hydraulically controlled one-way valve. The advantage of this circuit is that the cartridge reversing valve can control the closing and opening of the logic valve in the form of internal control or external control, the control method is more stable, the leakage is smaller than that of the hydraulically controlled one-way valve, and the position of the actuator can be effectively controlled. It is still installed in a stacking manner, the hydraulic circuit changes little, the installation is convenient, and the interchangeability is good.

[0033] Specifically, Figure 1 As shown, there are two groups of cartridge logic valves 301 , and the integrated valve group uses two cartridge logic valves 301 to control the on-off of the oil circuit.

[0034] Specifically, Figure 1 As shown, the cartridge logic valve 301 and the cartridge solenoid valve 302 are connected to each other, and the cartridge solenoid valve 302 is used to control the cartridge logic valve 301 .

[0035] Specifically, Figure 1As shown, the cartridge logic valve 301 is an unbalanced cone valve structure, and the cartridge logic valve 301 is a two-way switch unit and is in a closed state under spring bias.

[0036] Specifically, Figure 1 As shown, when the electro-hydraulic reversing valve 1 loses power, the plug-in logic valve 301 is closed under the action of the spring force, and the valve core return oil circuit is closed.

[0037] Specifically, Figure 1 As shown, when the plug-in logic valve 301 is connected to an external oil drain, no matter how high the pressure is at the electro-hydraulic reversing valve 1 and the superimposed double one-way throttle valve 2, the valve always remains closed.

[0038] Specifically, Figure 1 As shown, the conversion valve block assembly 3 can be used in conjunction with a DN16 diameter servo valve, can effectively control the position of the actuator, and can maintain the locking position of the actuator for a long time.

[0039] By adopting the above technical solution, the problems of excessive back pressure, too small load force, negative load, etc. in some existing special hydraulic systems are solved, and the hydraulic hydraulic control one-way valve is found to be opened by mistake, the actuator position moves, and the accuracy required for use is not achieved.

[0040] Working principle: When the present application is in use, first, the valve group adopts two cartridge logic valves 301 to control the on-off of the oil circuit, and a cartridge solenoid valve 302 is used to control the opening and closing of the cartridge logic valve 301. When the cartridge solenoid valve 302 is energized, the electromagnetic force on the cartridge solenoid valve 302 is greater than the spring force, the cartridge solenoid valve 302 conducts the oil through, and the pilot oil enters the control chamber of the cartridge logic valve 301. The oil pressure of the valve core of the cartridge logic valve 301 is greater than the spring force, and the valve core of the cartridge logic valve 301 opens the oil circuit. When the electro-hydraulic reversing valve 1 loses power, the valve core of the cartridge logic valve 301 opens under the action of the spring force. The return oil circuit is closed, the structure of the cartridge logic valve 301 is an unbalanced cone valve structure, the cartridge logic valve 301 is a two-way switch unit and is in a closed state under spring bias, the pressure of the electro-hydraulic reversing valve 1 or the superimposed double one-way throttle valve 2 will close the valve core, and the pressure of the cartridge logic valve 301 will open the valve. The force generated by the cartridge logic valve 301 must be greater than the sum of the force generated by the electro-hydraulic reversing valve 1, the superimposed double one-way throttle valve 2, and the spring force to maintain the open state. When the cartridge logic valve 301 is externally connected to drain oil, no matter how high the pressure is at the electro-hydraulic reversing valve 1 and the superimposed double one-way throttle valve 2, the valve group always remains closed.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A high-precision integrated valve group replacing a stacked hydraulically controlled one-way valve, comprising an electro-hydraulic reversing valve (1), characterized in that: A stacked double one-way throttle valve (2) is provided below the electro-hydraulic reversing valve (1), and a conversion valve block assembly (3) is provided below the stacked double one-way throttle valve (2); The conversion valve block assembly (3) comprises a cartridge-type logic valve (301) and a cartridge-type solenoid valve (302); the cartridge-type logic valve (301) and the cartridge-type solenoid valve (302) are both arranged below the stacked double-one-way throttle valve (2); and the electro-hydraulic reversing valve (1), the stacked double-one-way throttle valve (2), the cartridge-type logic valve (301) and the cartridge-type solenoid valve (302) are interconnected.

2. A high-precision integrated valve group replacing a stacked hydraulically controlled one-way valve according to claim 1, characterized in that: The number of the plug-in logic valves (301) is two groups, and the integrated valve group uses two plug-in logic valves (301) to control the on-off of the oil circuit.

3. A high-precision integrated valve group replacing a stacked hydraulically controlled one-way valve according to claim 1, characterized in that: The cartridge-type logic valve (301) and the cartridge-type solenoid valve (302) are connected to each other, and the cartridge-type solenoid valve (302) is used to control the cartridge-type logic valve (301).

4. A high-precision integrated valve group replacing a stacked hydraulically controlled one-way valve according to claim 1, characterized in that: The cartridge-type logic valve (301) is an unbalanced cone valve structure, and the cartridge-type logic valve (301) is a two-way switch unit and is in a closed state under spring bias.

5. According to claim 1, a high-precision integrated valve group replacing a stacked hydraulically controlled one-way valve is characterized in that: When the electro-hydraulic reversing valve (1) loses power, the plug-in logic valve (301) closes the valve core return oil circuit under the action of the spring force.

6. A high-precision integrated valve group replacing a stacked hydraulically controlled one-way valve according to claim 1, characterized in that: When the plug-in logic valve (301) is connected to an external oil drain, the valve always remains closed regardless of the pressure at the electro-hydraulic reversing valve (1) and the superimposed double one-way throttle valve (2).

7. A high-precision integrated valve group replacing a stacked hydraulically controlled one-way valve according to claim 1, characterized in that: The conversion valve block assembly (3) can be used in conjunction with a DN16 diameter servo valve, can effectively control the position of the actuator, and can maintain the locking position of the actuator for a long time.

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