A two-way plug-in high-frequency response flow valve

Abstract

The present invention relates to the field of hydraulic machinery technology, and specifically to a two-way plug-in high-frequency response flow valve, comprising a pilot control valve, one end of the pilot control valve is connected to a cavity A, and the other end of the pilot control valve is connected to a cavity B, the lower end of the pilot control valve is provided with a second-stage mechanism for flow control, and the interior of the second-stage mechanism for flow control is provided with a second-stage main valve core, one side of the second-stage main valve core is provided with a sensor core, and the exterior of the sensor core is provided with an inductive position sensor, one end of the inductive position sensor is connected to a pilot control valve amplifier, relative to the existing two-way plug-in high-frequency response flow valve, the cover plate plug-in structure of the present application has a compact structure and a standard hydraulic jack design; the pilot type design has closed-loop control; the valve sleeve and valve core are hardened and have a longer service life; valves of different diameters can be designed according to actual use conditions to meet the flow requirements of various working conditions.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic machinery, in particular to a two-way plug-in high-frequency response flow valve. Background Art

[0002] The two-way cartridge high-frequency response flow valve is a precision control element used in hydraulic systems. It adopts a two-way cartridge structure design. This structure has the advantages of easy installation and large flow capacity. "High frequency response" means that the flow valve can quickly respond to the input control signal and quickly and accurately adjust the flow. Compared with traditional flow valves, it has a shorter response time and higher dynamic performance. Its main function is to accurately control the flow of liquid in the hydraulic system by changing the opening of the valve port, thereby meeting the system's demand for flow under different working conditions and realizing precise control of the speed and position of the actuator. It is often used in hydraulic systems with high requirements for control accuracy and response speed, such as aerospace, precision machine tools and other fields.

[0003] With the design requirements of hydraulic systems in industries such as presses, die-casting machines, and segmented punching and shearing, the requirements for valve response time, pressure, and flow are becoming increasingly stringent. The design of the present invention is aimed at closed-loop control with high pressure, large flow, and fast dynamic response in industries such as large die-casting. Summary of the invention

[0004] The object of the present invention is to provide a two-way plug-in high-frequency response flow valve to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: comprising a pilot control valve, one end of the pilot control valve is connected to cavity A, and the other end of the pilot control valve is connected to cavity B, the lower end of the pilot control valve is provided with a second-stage mechanism for flow control, and the second-stage mechanism for flow control is internally provided with a second-stage main valve core, a sensor core is provided on one side of the second-stage main valve core, and an inductive position sensor is provided outside the sensor core, and one end of the inductive position sensor is connected to a pilot control valve amplifier.

[0006] Preferably, a mounting assembly is disposed inside the other side of the second-stage main valve core, and an acceleration assembly is disposed at one end of the mounting assembly away from the second-stage main valve core.

[0007] Preferably, a side of the acceleration component away from the mounting component is connected to an elastic buffer component, and a side of the elastic buffer component away from the acceleration component is connected to a turbine component.

[0008] Preferably, the mounting assembly includes a mounting frame, a mounting bearing and a rotating shaft, and the mounting frame is provided with a mounting bearing inside, and the mounting bearing is connected to the rotating shaft inside.

[0009] Preferably, the rotating shaft forms a rotating structure with the mounting frame through the mounting bearing, and the horizontal center line of the rotating shaft coincides with the horizontal center line of the second-stage main valve core.

[0010] Preferably, the acceleration assembly comprises an acceleration blade and a blocking rod, and the blocking rod is installed on both sides of the acceleration blade.

[0011] Preferably, the elastic buffer assembly includes a sleeve rod and a spring, and the spring is arranged inside the sleeve rod.

[0012] Preferably, the elastic buffer assembly further comprises a square rod and a telescopic rod, and the square rod is installed on the inner side of the spring, and the telescopic rod is arranged on the outer side of the upper end of the square rod.

[0013] Preferably, the telescopic rod forms an elastic telescopic structure through a spring and a sleeve rod, and a sliding inlay structure is formed between the telescopic rod and the square rod.

[0014] Preferably, the turbine assembly includes a turbine shaft and turbine blades, and the turbine blades are arranged outside the turbine shaft.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The equipment has a plug-in cover structure with a compact structure and standard hydraulic jack design; the pilot design has closed-loop control; the valve sleeve and valve core are hardened for a longer service life; valves of different diameters can be designed according to actual working conditions to meet the flow requirements of various working conditions.

[0017] 2. The turbine blades of the equipment will drive the turbine shaft to rotate with the help of the force of the liquid flow. The conical shape of the turbine shaft makes it easier for the liquid to flow through the turbine blades, reducing the impact force of the liquid flow on the turbine shaft. The blocking rod can hinder the liquid flowing to the acceleration blades, thereby reducing the impact force of the liquid flow on the second-stage main valve core. The telescopic rod forms an elastic telescopic structure through the spring and the sleeve rod. The elastic telescopic structure buffers the turbine assembly and absorbs the impact force of the liquid, thereby reducing the impact force of the liquid. The impact force of the liquid is reduced through the above three parts, thereby avoiding the impact force of the liquid on the position of the second-stage main valve core and increasing the accuracy of equipment adjustment.

[0018] 3. The turbine shaft of the device will drive the elastic buffer assembly to rotate during the rotation process, thereby driving the acceleration blade to rotate through the elastic buffer assembly. The rotation of the acceleration blade applies a centrifugal force to the liquid, thereby facilitating the liquid to flow out from port B in the figure, making it easier for the liquid inside the device to flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an overall diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the acceleration assembly of the present invention;

[0021] Figure 3 It is a schematic diagram of the cross-sectional structure of the elastic buffer component of the present invention;

[0022] Figure 4 This is a schematic diagram of the main valve core structure of the second stage of the present invention;

[0023] Figure 5 This is the electrical wiring diagram of the present invention.

[0024] In the figure: 1. pilot control valve; 2. second-stage mechanism for flow control; 3. inductive position sensor; 4. sensor core; 5. second-stage main valve core; 6. pilot control valve amplifier; 7. A chamber; 8. B chamber; 9. mounting assembly; 901. mounting frame; 902. mounting bearing; 903. rotating shaft; 10. acceleration assembly; 1001. acceleration blade; 1002. blocking rod; 11. elastic buffer assembly; 1101. sleeve rod; 1102. spring; 1103. square rod; 1104. telescopic rod; 12. turbine assembly; 1201. turbine shaft; 1202. turbine blade. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1 and Figure 4 The present invention provides a technical solution: comprising a pilot control valve 1, one end of the pilot control valve 1 is connected to a cavity A 7, and the other end of the pilot control valve 1 is connected to a cavity B 8, a second-stage mechanism 2 for flow control is arranged at the lower end of the pilot control valve 1, and a second-stage main valve core 5 is arranged inside the second-stage mechanism 2 for flow control, a sensor iron core 4 is arranged on one side of the second-stage main valve core 5, and an inductive position sensor 3 is arranged outside the sensor iron core 4, and one end of the inductive position sensor 3 is connected to a pilot control valve amplifier 6;

[0027] This device is mainly used for closed-loop position, pressure, force and speed control in hydraulic systems. The pilot control valve 1 performs proportional position control and manipulates the second-stage main valve core 5 through closed-loop valve control to control the flow into chamber A 7 or out of chamber B 8 until the system deviation is zero. The stroke of the second-stage main valve core 5 is controlled in proportion to the command signal.

[0028] Valve characteristics: Flow can flow from chamber A 7 to chamber B 8 or chamber B 8 to chamber A 7 through the pilot control valve 1. The poppet valve opens or closes at a command value of 5%. For smaller command values, the closed-loop valve control tries to correct the position of the second-stage main valve core 5, so that the maximum pilot pressure is pressed on the valve seat and the main valve is closed without leakage.

[0029] The dynamic characteristics of the valve are valid only within the closed-loop control range of the valve. For a step of the command signal from a fixed position to a small open position, there will be an additional delay time.

[0030] The 5% opening point (i.e. 5% dead zone) is preset before leaving the factory, and the electronic controller has a bias setting to balance the correction of the pilot stage.

[0031] The two-stage pilot closed-loop position, response time ≤70ms, integrated electronic control and closed-loop controller (OBE) meet the hydraulic working conditions of large flow and fast response time.

[0032] The equipment has a plug-in cover structure with a compact structure and a standard hydraulic jack design; the pilot design has a closed-loop control; the valve sleeve and valve core are hardened for a longer service life; valves of different diameters can be designed according to actual working conditions to meet the flow requirements of various working conditions

[0033] like Figure 1 and Figure 2 As shown, a mounting assembly 9 is provided inside the other side of the second-stage main valve core 5, and an acceleration assembly 10 is provided at the end of the mounting assembly 9 away from the second-stage main valve core 5, an elastic buffer assembly 11 is connected to the side of the acceleration assembly 10 away from the mounting assembly 9, and a turbine assembly 12 is connected to the side of the elastic buffer assembly 11 away from the acceleration assembly 10.

[0034] like Figure 1 As shown, the mounting assembly 9 includes a mounting frame 901, a mounting bearing 902 and a rotating shaft 903, and the mounting frame 901 is provided with a mounting bearing 902 inside, and the mounting bearing 902 is connected with the rotating shaft 903 inside, and the rotating shaft 903 forms a rotating structure through the mounting bearing 902 and the mounting frame 901, and the horizontal center line of the rotating shaft 903 coincides with the horizontal center line of the second-stage main valve core 5;

[0035] By means of the rotating structure formed between the rotating shaft 903 and the mounting frame 901 , the acceleration assembly 10 can have a rotating function, which facilitates the rotation of the acceleration assembly 10 , the elastic buffer assembly 11 and the turbine assembly 12 .

[0036] like Figure 2 As shown, the acceleration assembly 10 includes an acceleration blade 1001 and a blocking rod 1002, and the blocking rods 1002 are installed on both sides of the acceleration blade 1001;

[0037] The turbine shaft 1201 will drive the elastic buffer assembly 11 to rotate during the rotation process, thereby driving the acceleration blade 1001 to rotate through the elastic buffer assembly 11, and applying a centrifugal force to the liquid through the rotation of the acceleration blade 1001, so that the liquid can be easily Figure 4 The liquid flows out from port B in the device, making it easier for the liquid inside the device to flow.

[0038] like Figure 3 As shown, the elastic buffer assembly 11 includes a sleeve rod 1101 and a spring 1102, and the sleeve rod 1101 is provided with the spring 1102 inside, the elastic buffer assembly 11 also includes a square rod 1103 and a telescopic rod 1104, and the square rod 1103 is installed on the inner side of the spring 1102, and the telescopic rod 1104 is provided on the upper end of the square rod 1103. The telescopic rod 1104 forms an elastic telescopic structure through the spring 1102 and the sleeve rod 1101, and the telescopic rod 1104 and the square rod 1103 are inlaid with each other in a sliding manner.

[0039] The telescopic rod 1104 forms an elastic telescopic structure with the spring 1102 and the sleeve rod 1101, and the elastic telescopic structure buffers the turbine assembly 12 and absorbs the impact force of the liquid, thereby reducing the impact force of the liquid.

[0040] like Figure 2 As shown, the turbine assembly 12 includes a turbine shaft 1201 and turbine blades 1202, and the turbine blades 1202 are arranged outside the turbine shaft 1201;

[0041] The turbine blades 1202 will drive the turbine shaft 1201 to rotate with the help of the force of the liquid flow. The conical shape of the turbine shaft 1201 makes it easier for the liquid to flow through the turbine blades 1202, reducing the impact force of the liquid flow on the turbine shaft 1201. The blocking rod 1002 can hinder the liquid flowing to the acceleration blades 1001, thereby reducing the impact force of the liquid flow on the second-stage main valve core 5. The telescopic rod 1104 forms an elastic telescopic structure through the spring 1102 and the sleeve rod 1101. The elastic telescopic structure buffers the turbine assembly 12 and absorbs the impact force of the liquid, thereby reducing the impact force of the liquid. The impact force of the liquid is reduced by the above three parts, thereby avoiding the impact force of the liquid on the position of the second-stage main valve core 5 and increasing the accuracy of equipment adjustment.

[0042] Working principle: First, the pilot control valve 1 is used to control the inlet and outlet liquids of the A chamber 7 and the B chamber 8. The amount of liquid inside the A chamber 7 and the B chamber 8 forms hydraulic pressure to push the position of the second-stage main valve core 5, thereby opening or closing the air of the equipment, and the opening amount, so as to Figure 4From the perspective of the device, the valve body is mainly used to allow liquid to flow into port A and liquid to flow out of port B. The position movement of the second-stage main valve core 5 controls the opening and closing size of port B to realize the control function of the device. When the second-stage main valve core 5 moves, the position sensing function formed by the sensor iron core 4 and the inductive position sensor 3 is used to detect the position of the second-stage main valve core 5, thereby determining the position of the second-stage main valve core 5. The inductive position sensor 3 will convert the position information of the second-stage main valve core 5 into an electrical signal and transmit it to the pilot control valve amplifier 6 for processing, so that the pilot control valve amplifier 6 controls the pilot control valve 1 to work, thereby realizing the position adjustment of the second-stage main valve core 5.

[0043] The liquid flow entering the device during operation will impact the turbine blades 1202. At this time, the turbine blades 1202 will use the force of the liquid flow to drive the turbine shaft 1201 to rotate. The conical shape of the turbine shaft 1201 makes it easier for the liquid flow to flow through the turbine blades 1202, reducing the impact force of the liquid flow on the turbine shaft 1201. The turbine shaft 1201 will drive the elastic buffer component 11 to rotate during the rotation, thereby driving the acceleration blade 1001 to rotate through the elastic buffer component 11. The rotation of the acceleration blade 1001 applies a centrifugal force to the liquid, thereby facilitating the liquid to flow from Figure 4 The liquid flows out from the B port in the middle, and the blocking rod 1002 can hinder the liquid flowing to the acceleration blade 1001, so that the impact force of the liquid flow on the second-stage main valve core 5 can be reduced, thereby ensuring that the second-stage main valve core 5 is in an accurate position, increasing the accuracy of the equipment, and relying on the rotating structure formed by the rotating shaft 903 through the mounting bearing 902 and the mounting frame 901, the acceleration component 10 can have a rotation function, which is convenient for the rotation of the acceleration component 10, the elastic buffer component 11 and the turbine component 12.

[0044] The telescopic rod 1104 of the present application forms an elastic telescopic structure between the spring 1102 and the sleeve rod 1101. The elastic telescopic structure buffers the turbine assembly 12 and absorbs the impact force of the liquid, thereby reducing the impact force of the liquid and preventing the impact force of the liquid from affecting the position of the second-stage main valve core 5 and affecting the adjustment effect of the equipment. The sliding structure between the square rod 1103 and the telescopic rod 1104 can guide the telescopic rod 1104 while preventing the telescopic rod 1104 from rotating, so that the turbine assembly 12 can drive the acceleration assembly 10 to rotate through the elastic buffer assembly 11.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A two-way plug-in high-frequency response flow valve, comprising a pilot control valve (1), characterized in that: One end of the pilot control valve (1) is connected to the A chamber (7), and the other end of the pilot control valve (1) is connected to the B chamber (8); a second-stage mechanism (2) for flow control is provided at the lower end of the pilot control valve (1), and a second-stage main valve core (5) is provided inside the second-stage mechanism (2) for flow control; a sensor iron core (4) is provided on one side of the second-stage main valve core (5), and an inductive position sensor (3) is provided outside the sensor iron core (4); one end of the inductive position sensor (3) is connected to the pilot control valve amplifier (6); A mounting assembly (9) is disposed inside the other side of the second-stage main valve core (5), and an acceleration assembly (10) is disposed at one end of the mounting assembly (9) away from the second-stage main valve core (5); The side of the acceleration component (10) away from the mounting component (9) is connected to an elastic buffer component (11), and the side of the elastic buffer component (11) away from the acceleration component (10) is connected to a turbine component (12); The mounting assembly (9) comprises a mounting frame (901), a mounting bearing (902) and a rotating shaft (903), wherein the mounting frame (901) is provided with a mounting bearing (902) inside, and the rotating shaft (903) is connected inside the mounting bearing (902); The accelerating assembly (10) comprises an accelerating blade (1001) and a blocking rod (1002), and the blocking rods (1002) are installed on both sides of the accelerating blade (1001); The elastic buffer component (11) comprises a sleeve rod (1101) and a spring (1102), and the sleeve rod (1101) is provided with a spring (1102) inside. The elastic buffer assembly (11) further comprises a square rod (1103) and a telescopic rod (1104), wherein the square rod (1103) is installed on the inner side of the spring (1102), and the telescopic rod (1104) is arranged on the outer side of the upper end of the square rod (1103).

2. A two-way plug-in high-frequency response flow valve according to claim 1, characterized in that: The rotating shaft (903) forms a rotating structure with the mounting frame (901) through the mounting bearing (902), and the horizontal center line of the rotating shaft (903) coincides with the horizontal center line of the second-stage main valve core (5).

3. A two-way plug-in high-frequency response flow valve according to claim 2, characterized in that: The telescopic rod (1104) forms an elastic telescopic structure through the spring (1102) and the sleeve rod (1101), and a sliding inlay structure is formed between the telescopic rod (1104) and the square rod (1103).

4. A two-way plug-in high-frequency response flow valve according to claim 3, characterized in that: The turbine assembly (12) comprises a turbine shaft (1201) and turbine blades (1202), and the turbine blades (1202) are arranged outside the turbine shaft (1201).

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