Inching type flow adjusting device

Abstract

The utility model discloses an inching type flow regulating device, which comprises a hydraulic control valve, a flow regulating valve and a flow regulating valve, the first electromagnetic valve is connected with the liquid inlet end of the first proportional valve and a control cavity on one side of the hydraulic control valve, and the liquid outlet end of the first proportional valve is connected with the liquid inlet end on one side of the hydraulic control valve through a pipeline; the second electromagnetic valve is connected with the liquid inlet end of the second proportional valve and a control cavity on the other side of the hydraulic control valve, and the liquid outlet end of the second proportional valve is connected with the liquid inlet end on the other side of the hydraulic control valve through a pipeline; two liquid outlet ends of the hydraulic control valve are respectively connected to the controlled valves through pipelines; a first piston and a second piston are respectively arranged in the first proportional valve and the second proportional valve; the bottom of the first piston is connected with a first spring, and the bottom of the second piston is connected with a second spring. Mounting cylinders are arranged at the bottom ends of the first proportional valve and the second proportional valve, sealing plugs are in threaded connection with the interiors of the mounting cylinders, and stop columns are fixed to the sealing plugs. The problems that in the prior art, a common driving mode is poor in control precision, low in reliability and small in driving force are solved.

Description

[Technical Field]

[0001] This utility model belongs to the field of flow regulation technology, specifically relating to a jog-type flow regulation device. [Background Technology]

[0002] In aerospace, a regulator is a device used to adjust and control critical parameters of aerospace systems. Its function is to ensure that the system's state and performance meet expected targets or remain within a stable range. Conventional regulators rely on three driving methods: high-speed valves, servo valves, or motors. High-speed valves suffer from lower control accuracy due to structural limitations; servo valves, while offering higher accuracy, are susceptible to oil contamination and lack reliability; and while motor-driven solutions can achieve open-loop control, their driving force is relatively small and require complex amplification mechanisms, increasing the risk of failure. Therefore, there is an urgent need for a flow control device that combines high precision, large driving force, and strong resistance to contamination. [Utility Model Content]

[0003] The purpose of this invention is to provide a jog-type flow regulating device to solve the problems of poor control accuracy, low reliability and small driving force in the ordinary driving method of the prior art.

[0004] This utility model adopts the following technical solution: a jog-type flow regulating device, comprising:

[0005] A hydraulic control valve, comprising two inlet ends, two outlet ends, and two control chambers;

[0006] The first solenoid valve is connected to the inlet end of the first metering valve and the control chamber on one side of the liquid control valve through a pipe. The outlet end of the first metering valve is connected to the inlet end of the liquid control valve on one side through a pipe.

[0007] The second solenoid valve is connected to the inlet end of the second metering valve and the control chamber on the other side of the hydraulic control valve via a pipe. The outlet end of the second metering valve is connected to the inlet end of the hydraulic control valve via a pipe.

[0008] The two outlets of the hydraulic control valve are connected to the rod chamber and rodless chamber of the controlled valve respectively via pipelines;

[0009] The first metering valve and the second metering valve are respectively equipped with a first piston and a second piston; the bottom of the first piston is connected to a first spring, and the bottom of the second piston is connected to a second spring.

[0010] The bottom of both the first and second metering valves is provided with an installation cylinder. A sealing plug is threaded into the installation cylinder, and a stop pin is fixed on the sealing plug. The stop pin extends into the corresponding first or second metering valve to adjust the limit displacement of the piston.

[0011] The first and second metering valves are used for fixed-capacity output, respectively, and work with the high-pressure oil circuit to directly drive the controlled valve to achieve precise displacement adjustment.

[0012] Furthermore, the top of each stop post is disc-shaped and is coaxially arranged with the corresponding first or second piston.

[0013] Furthermore, each mounting cylinder has a vertical stop gauge on one side to calibrate the screw-in depth of the sealing plug.

[0014] Furthermore, the controlled valve is one of a spool valve, a single piston rod valve, or a needle valve.

[0015] The beneficial effects of this utility model are:

[0016] In this invention, a fixed volume of oil is output through a first and a second metering valve. The first and second solenoid valves synchronously control the hydraulic control valve, opening the corresponding high-pressure oil circuit. This allows the high-pressure oil to push the controlled valve to move precisely a fixed distance, achieving inching flow regulation without the need for closed-loop control. Furthermore, the pressure of the oil pushing the controlled valve is the same as the pressure of the high-pressure oil, achieving high-pressure actuation and strong driving force. The first and second solenoid valves transmit pressure through the oil, effectively isolating other contaminants and preventing drive jamming. This results in high-precision and high-driving-force controlled valve control with excellent performance.

[0017] In this invention, a sealing plug is connected to the bottom of the first and second metering valves via a threaded mounting cylinder. A stop post on the sealing plug is positioned at the bottom of the corresponding first and second pistons. By controlling the position of the sealing plug on the threaded mounting cylinder, the insertion length of the stop post into the first and second metering valves is controlled, thereby controlling the limit movement positions of the first and second pistons and adjusting the output fluid capacity. This design is convenient to adjust and has good performance. [Attached Image Description]

[0018] Figure 1 This is a schematic diagram of the structure and system operation of the first solenoid valve of this utility model when it is energized;

[0019] Figure 2 For the present utility model Figure 1 Enlarged view of the structure at point A in the middle;

[0020] Figure 3 This is a schematic diagram of the system operation when the second solenoid valve of this utility model is energized.

[0021] In the diagram: 1. First solenoid valve; 2. First metering valve; 201. First piston; 202. First spring; 3. Hydraulic control valve; 4. Second solenoid valve; 5. Second metering valve; 501. Second piston; 502. Second spring; 6. Controlled valve; 7. Mounting cylinder; 8. Sealing plug; 9. Stop pin; 10. Stop ruler.

Detailed Implementation Methods

[0022] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0023] This utility model provides a jog-type flow regulating device, such as... Figure 1 As shown, it includes: a first solenoid valve 1, a second solenoid valve 4, a hydraulic control valve 3, a first metering valve 2, a second metering valve 5, and a controlled valve 6;

[0024] The hydraulic control valve 3 includes two inlet ends, two outlet ends, and two control chambers;

[0025] The first solenoid valve 1 is connected to the inlet end of the first metering valve 2 and one side control chamber of the liquid control valve 3 through a pipe. The outlet end of the first metering valve 2 is connected to the inlet end of the liquid control valve 3 through a pipe.

[0026] The second solenoid valve 4 is connected to the inlet end of the second metering valve 5 and the control chamber on the other side of the hydraulic control valve 3 via a pipe. The outlet end of the second metering valve 5 is connected to the inlet end of the hydraulic control valve 3 via a pipe. The first metering valve 2 and the second metering valve 5 can be cylindrical.

[0027] The two outlets of the hydraulic control valve 3 are connected to the rod chamber and rodless chamber of the controlled valve 6 respectively via pipelines;

[0028] The first metering valve 2 and the second metering valve 5 are respectively provided with a first piston 201 and a second piston 501; the bottom of the first piston 201 is connected to a first spring 202, and the bottom of the second piston 501 is connected to a second spring 502; the piston and the spring cooperate to limit the volume of the metered output fluid.

[0029] like Figure 2 As shown, both the first metering valve 2 and the second metering valve 5 have a mounting cylinder 7 at their bottom ends. A sealing plug 8 is threaded into the mounting cylinder 7, and a stop pin 9 is fixed to the sealing plug 8. The stop pin 9 extends into the corresponding first metering valve 2 or second metering valve 5 to adjust the piston's limit displacement. The stop pin 9 is used to abut against the first piston 201 or the second piston 501. By controlling the position of the threaded sealing plug 8 on the mounting cylinder 7, the insertion length of the stop pin 9 into the first metering valve 2 and the second metering valve 5 is controlled, thereby controlling the limit movement positions of the first piston 201 and the second piston 501, and thus adjusting the output fluid capacity. This method is convenient to adjust and has good performance.

[0030] The mounting cylinder 7 at the bottom of the first metering valve 2 and the second metering valve 5 are threadedly connected to the sealing plug 8. By rotating the sealing plug 8, the insertion length of the stop pin 9 is changed. The top of the stop pin 9 is used to press against the first piston 201 and the second piston 501 that are approaching it, thereby adjusting the limit displacement of the first piston 201 and the second piston 501, and thus controlling the output flow of the first metering valve 2 and the second metering valve 5.

[0031] The first metering valve 2 and the second metering valve 5 are used for constant capacity output, and together with the high-pressure oil circuit, they directly drive the controlled valve 6, achieving precise inching displacement adjustment without closed-loop control. The pressure of the high-pressure oil is the same as the pressure driving the controlled valve, significantly increasing the driving force and making it suitable for high-load scenarios. The two solenoid valves transmit pressure through the oil, and the oil as a medium can effectively isolate external contaminants, prevent piston jamming, and improve the reliability of the device.

[0032] In some embodiments, the top of each stop post 9 is disc-shaped and is coaxially arranged with the corresponding first piston 201 or second piston 501.

[0033] The disc-shaped top of the stop post 9 can effectively increase its contact area with the first piston 201 and the second piston 501, thereby ensuring the stability of the stop post 9 when it abuts against the first piston 201 and the second piston 501. The stop post 9, the first piston 201 and the second piston 501 are arranged on the same axis, ensuring that the stop post 9 is directly facing and abutting against the first piston 201 and the second piston 501, thus improving the reliability and stability of the jog flow regulating device.

[0034] In some embodiments, a stop gauge 10 is vertically provided on one side of each mounting cylinder 7 to calibrate the screw-in depth of the sealing plug 8. The scale design of the stop gauge makes the adjustment process intuitive and facilitates quick adaptation to different working conditions. The installation position of the sealing plug 8 is marked by the scale on the stop gauge 10, thereby controlling the insertion length of the stop pin 9 into the first metering valve 2 and the second metering valve 5, making installation and adjustment convenient.

[0035] In some embodiments, the controlled valve 6 is one of a spool valve, a single-piston rod valve, or a needle valve. The fluid volume output by the metering valve is adapted to the displacement requirements of the controlled valve, expanding the application scenarios.

[0036] This device outputs a fixed volume of oil through the first metering valve 2 and the second metering valve 5. The first solenoid valve 1 and the second solenoid valve 4 synchronously control the hydraulic control valve 3, opening the corresponding high-pressure oil circuit. This allows the high-pressure oil to push the controlled valve 6 to move precisely a fixed distance, achieving inching flow regulation without the need for closed-loop control. Furthermore, the oil pressure pushing the controlled valve 6 is the same as the high-pressure oil pressure, resulting in high-pressure actuation and strong driving force. The pressure transmission between the first solenoid valve 1 and the second solenoid valve 4 through the oil effectively isolates other contaminants, preventing drive blockage. This achieves high-precision and high-driving-force control of the controlled valve 6, resulting in excellent performance.

[0037] The method of using the inching flow regulating device of this utility model is as follows:

[0038] S1. According to the required flow rate, rotate the sealing plug 8 at the bottom of the first metering valve 2 and the second metering valve 5, adjust the insertion length of the stop rod 9 by the scale of the stop ruler 10, set the limit displacement of the first piston 201 and the second piston 501, and thus determine the volume of oil output in a single operation.

[0039] S2. With an external power source connected to the first solenoid valve 1 and the second solenoid valve 4, high-pressure oil is alternately input into the first solenoid valve 1 and the second solenoid valve 4:

[0040] S2.1, such as Figure 1 As shown, when the first solenoid valve 1 is energized, high-pressure oil enters one control chamber of the first metering valve 2 and the hydraulic control valve 3. The high-pressure oil is transmitted to the first piston 201 inside the first metering valve 2, which is connected to the first spring 202. The high-pressure oil compresses the first spring 202 through the first piston 201, causing the spring 202 to compress to its limit position. The first spring 202 then limits the movement of the first piston 201, thus discharging the oil in a metered manner. The metered oil then enters the controlled valve 6 through the hydraulic control valve 3, causing the controlled valve 6 to move to one side, thus achieving precise displacement of the controlled valve 6.

[0041] At the same time, the low-pressure oil circuit located on the side of the second solenoid valve returns, and the second piston 501 resets.

[0042] S2.2, such as Figure 3 As shown, when the second solenoid valve 4 is energized, the high-pressure oil enters the control chambers on the other side of the second metering valve 5 and the hydraulic control valve 3, respectively.

[0043] The high-pressure oil body drives the second metering valve 5 to output a metered amount of oil. The second piston 501 is limited by the second spring 502, so that the metered high-pressure oil body is introduced into the controlled valve 6 through the hydraulic control valve 3, pushing the controlled valve 6 to move in the opposite direction. At the same time, the first piston 201 is reset, so that the controlled valve 6 can be pushed again. When the high-pressure oil body pushes on one side, the low-pressure oil circuit on the other side flows back.

[0044] In summary, the first piston 201 and the second piston 501 are alternately reset to facilitate the next control action. The reciprocating jog adjustment of the controlled valve 6 is achieved by alternately controlling the first solenoid valve 1 and the second solenoid valve 4. Specifically, the tightness of the sealing plug 8 is checked periodically to ensure the stable position of the stop pin 9; the output flow parameters can be quickly restored or adjusted by recalibrating the scale using the stop ruler 10.

Claims

1. A jog type flow regulating device, characterized by, include: The hydraulic control valve (3) includes two inlet ends, two outlet ends and two control chambers; The first solenoid valve (1) is connected to the inlet end of the first metering valve (2) and the control chamber on one side of the liquid control valve (3) through a pipe. The outlet end of the first metering valve (2) is connected to the inlet end of the liquid control valve (3) through a pipe. The second solenoid valve (4) is connected to the inlet end of the second metering valve (5) and the control chamber on the other side of the liquid control valve (3) through a pipe. The outlet end of the second metering valve (5) is connected to the inlet end of the liquid control valve (3) on the other side through a pipe. The two outlet ends of the hydraulic control valve (3) are connected to the rod chamber and rodless chamber of the controlled valve (6) respectively through pipes; The first metering valve (2) and the second metering valve (5) are respectively provided with a first piston (201) and a second piston (501); the bottom of the first piston (201) is connected to a first spring (202), and the bottom of the second piston (501) is connected to a second spring (502); The bottom ends of the first metering valve (2) and the second metering valve (5) are provided with mounting cylinders (7). The mounting cylinder (7) is internally threaded with a sealing plug (8). A stop post (9) is fixed on the sealing plug (8). The stop post (9) extends into the corresponding first metering valve (2) or second metering valve (5) to adjust the limit displacement of the piston. Among them, the first metering valve (2) and the second metering valve (5) are used for fixed capacity output, and together with the high pressure oil circuit, they directly drive the controlled valve (6) to realize the inching displacement adjustment.

2. A trickle regulator as defined in claim 1, wherein The top of each stop post (9) is disc-shaped and is coaxially arranged with the corresponding first piston (201) or second piston (501).

3. A trickle regulator as claimed in claim 1 or 2, characterised in that Each of the mounting cylinders (7) has a vertical stop gauge (10) on one side for calibrating the screw-in depth of the sealing plug (8).

4. A trickle regulator as claimed in claim 1 or 2, wherein The controlled valve (6) is one of a slide valve, a single piston rod valve, or a needle valve.

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