A flow control regulating device and a regulating method thereof

Abstract

The present invention provides a flow control regulating device and a regulating method thereof, comprising a bracket; a coupling fixedly mounted on the rear part of the bracket; a motor connected and fixed to the rear end of the coupling; a guide sleeve; a front end sleeved and connected to the coupling; a pin fixing device fixed to the front part of the bracket; a pin mounted on the pin fixing device; the rear end of the pin is movably connected to the guide sleeve, and the front end of the pin acts on the valve core of a flow valve; a sensor fixedly mounted on the bracket to detect the rotation angle of the guide sleeve; a controller to receive sensor signals and control the operation of the motor; the beneficial effects of the present invention are as follows: the present invention ensures that the flow valve does not leak when closed and does not cause the motor to over-tighten and damage the valve; solves the problem that the flow valve cannot ensure whether the valve is completely closed when closed; and at the same time, achieves fine control of the flow of the flow valve to meet the working scenario of high-precision control.

Description

Technical Field

[0001] The invention relates to a regulating device for controlling flow and a regulating method thereof. Background Art

[0002] Existing flow control valves, including needle valves and stop valves, have the problem of not being tightly closed in automated production (because the current starting position calibration method is that the valve core is closed by default when it is rotated back to the starting calibration position), and the automatic control accuracy is not high, which cannot meet some work scenarios that require high-precision control, such as filter material aperture test. The principle is to adjust the opening of the needle valve under the condition that one side of the infiltrated filter material is closed, so as to control the gas flow, so that a pressure difference is formed on both sides of the filter material. When the pressure difference reaches a certain value, a bubble point is generated, because the gas wants to drive away the liquid in the infiltrated material and bubbles emerge. The initial bubble point and the pressure difference on both sides of the filter material at multiple bubble points are measured by the instrument, and then the pore size of the filter material is calculated by the formula to help determine the filtration accuracy. However, it is currently found that manual control and existing electric valves cannot meet the requirements for fine flow control. The pressure on one side of the filter material needs to be slowly increased by accurately controlling the flow during the process, so as to accurately capture the initial bubble point pressure difference. Summary of the invention

[0003] The object of the present invention is to overcome the above-mentioned defects and provide a flow control regulating device and a regulating method thereof.

[0004] The present invention adopts the following technical solutions:

[0005] A regulating device for controlling flow, comprising a bracket; a coupling fixedly mounted on the rear portion of the bracket, the coupling being a torsion coupling or an elastic coupling; a motor connected and fixed to the rear end of the coupling; a guide sleeve; sleeved and connected to the front end of the coupling; an ejector fixing device fixed to the front portion of the bracket; an ejector mounted on the ejector fixing device; the rear end of the ejector being movably connected to the guide sleeve, the front end of the ejector acting on the valve core of a flow valve; a sensor fixedly mounted on the bracket to detect the rotation angle of the guide sleeve; and a controller to receive sensor signals and control the operation of the motor.

[0006] Preferably, the ejector pin fixing device is an ejector pin nut.

[0007] Preferably, the sensor is a potentiometer, the outer ring of the potentiometer is fixedly mounted on the bracket, and the inner ring is installed in cooperation with the guide sleeve, so that the guide sleeve drives the inner ring of the potentiometer to rotate.

[0008] Preferably, the potentiometer is an angle potentiometer.

[0009] Preferably, the outer ring of the potentiometer is provided with a mounting ear, and the potentiometer is mounted on the bracket through the mounting ear.

[0010] Preferably, the motor is a stepper motor or a servo motor.

[0011] Preferably, the guide sleeve is a square guide sleeve with a square central opening; the rear end of the ejector pin is a square column, which is clearance-matched with the square guide sleeve.

[0012] A method for controlling flow: initially, the flow valve is in a tightly closed state, and this state is assumed to be the valve zero position, and the initial position is calibrated to zero by setting a sensor; when the flow valve needs to be opened, the motor is controlled by a controller, and the motor drives the torque coupling, and the torque coupling drives the guide sleeve to rotate, thereby driving the ejector pin to open the valve of the flow valve, and the motor is controlled to rotate forward or reversely as needed during the process, so as to achieve fine control of the flow of the flow valve; when the flow valve needs to be closed, the motor is controlled to reverse through the controller, and when the sensor detects the previously calibrated zero position, the controller will use the zero position as a reference and continue to control the motor to rotate a compensation angle to ensure that the valve is in a tight and leak-proof state.

[0013] In order to ensure that the flow valve is tightly closed, a complementary mode of sensor and torque coupling or elastic coupling is adopted. When the device needs to be closed during use, the motor drives the guide sleeve to rotate in the opposite direction. When the sensor detects the sensing point of the guide sleeve, it can be considered that the flow valve has reached the calibrated zero position. In theory, the flow valve is already in a tightly closed state, but due to the accuracy error of the sensor itself, it may not be tightly closed. To ensure that the valve is in a tightly closed state, when the sensor detects the calibrated zero position, the motor does not stop rotating but defaults to this point as the zero-degree angle position. The preset program will allow the stepper motor to rotate a set angle based on the zero-degree angle. This angle is a compensation angle calculated based on the accuracy of the sensor and the elastic deformation of the shrapnel torque coupling, thereby generating sufficient torque to ensure that the valve has sufficient tightening force without damaging the valve and the motor.

[0014] Preferably, the compensation angle is 2-5 degrees.

[0015] The beneficial effects of the present invention are as follows: the present invention has a compact and light structure, and by using an elastic coupling and a sensor, ensures that the flow valve does not leak when closed and does not cause over-tightening of the motor to damage the valve; solves the problem that the flow valve cannot ensure that the valve is tightly closed when closed; further controls the opening and closing of the flow valve by a stepper motor, and during use, controls the rotation of the stepper motor according to actual conditions through the electrical signal of the sensor to accurately adjust the flow of the flow valve, thereby reducing the tediousness of manual operation to constantly adjust the opening and closing degree of the needle valve and reducing human errors, thereby achieving fine control of the flow of the flow valve and meeting high-precision control working scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the present invention.

[0017] Figure 2 It is an overall schematic diagram of the present invention.

[0018] Figure 3 It is a partial schematic diagram of the invention. DETAILED DESCRIPTION

[0019] In order to make the purpose and technical solution of the present invention clearer, the present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0020] like Figure 1 to Figure 3 The flow control regulating device shown in the figure includes a bracket 7; a coupling 2, which is fixedly mounted on the rear part of the bracket 7, and the coupling 2 is a torsion coupling or an elastic coupling; a motor 1, which is connected and fixed to the rear end of the coupling 2; a guide sleeve 4, which is inserted into the front end of the coupling 2; a pin fixing device 6, which is fixed to the front part of the bracket 7; a pin 5, which is mounted on the pin fixing device 6; the rear end of the pin 5 is movably connected to the guide sleeve, and the shape of the rear end of the pin is the same as the shape of the guide sleeve connecting port, and the rear end of the pin is inserted into the connecting port of the guide sleeve, and the two work in clearance; the front end of the pin 5 works in threaded cooperation with the valve core of the flow valve 8; a sensor 3, which is fixedly mounted on the bracket 7 and detects the rotation angle of the guide sleeve; a controller (not shown in the figure), which receives sensor signals and controls the operation of the motor.

[0021] Preferably, the ejector pin fixing device is an ejector pin nut; the ejector pin nut limits the ejector pin position so that the front end thread of the ejector pin always cooperates with the valve core and prevents the ejector pin from falling out of the valve core.

[0022] Preferably, the sensor is a potentiometer, the outer ring of the potentiometer is fixedly mounted on the bracket, and the inner ring is installed in cooperation with the guide sleeve, so that the guide sleeve drives the inner ring of the potentiometer to rotate.

[0023] Preferably, the potentiometer is an angle potentiometer.

[0024] Preferably, the outer ring of the potentiometer is provided with a mounting ear, and the potentiometer is mounted on the bracket through the mounting ear.

[0025] Preferably, the motor is a stepper motor or a servo motor.

[0026] Preferably, the guide sleeve has a central opening in a square shape or other shapes that can be used for rotation (such as a regular polygon, plum blossom shape, etc.); the rear end of the ejector pin is correspondingly a square column or other shapes that can be used for rotation, which is gap-matched with the guide sleeve.

[0027] The bracket 7 includes a left support frame 71, a right support frame 72, an upper support frame 73, and a lower support frame 74. The left support frame 71 is fixed to the flow valve 8 by using a pin fixing device 6, and the right support frame 72 is fixed to the motor 1 by using a cross bolt. Then, a square guide sleeve is put on the four corners of the pin of the flow valve from left to right, and one end of the square guide sleeve is put into the coupling 2. The coupling 2 is connected to the motor 1, and the upper support frame 73 and the lower support frame 74 are put together and fixed to the left support frame 71 and the right support frame 72 by using hexagonal bolts.

[0028] The present invention has a compact and small structure; a stepper motor is used to drive the opening and closing of the ejector pin to accurately control the number of rotations and angles; the device uses a sensor to determine whether the flow valve is completely closed to ensure that the motor is not over-tightened after closing; the device uses a torque coupling or an elastic coupling to connect the motor and the needle valve rotation, which can avoid the time difference caused by the sensor feedback accuracy error and ensure that the torque generated before the motor stops completely will damage the needle valve.

[0029] A method for controlling flow: initially, the flow valve is in a tightly closed state, and this state is assumed to be the valve zero position, and the initial position is calibrated to zero by setting a sensor; when the flow valve needs to be opened, the motor is controlled by a controller, and the motor drives the torque coupling, and the torque coupling drives the guide sleeve to rotate, thereby driving the ejector pin to open the valve of the flow valve, and the motor is controlled to rotate forward or reversely as needed during the process, so as to achieve fine control of the flow of the flow valve; when the flow valve needs to be closed, the motor is controlled to reverse through the controller, and when the sensor detects the previously calibrated zero position, the controller will use the zero position as a reference and continue to control the motor to rotate a compensation angle to ensure that the valve is in a tight and leak-proof state.

[0030] The present invention is applicable to flow valves, such as needle valves, stop valves, etc., and in order to ensure that the flow valve is tightly closed, a complementary mode of a sensor and a torque coupling or an elastic coupling is adopted. When the device needs to be closed during use, the motor drives the guide sleeve to rotate in the opposite direction. When the sensor detects the sensing point of the guide sleeve, it can be considered that the flow valve has reached the calibrated zero position. Theoretically, the flow valve is already in a tightly closed state, but due to the accuracy error of the sensor itself, it may not be tightly closed. In order to ensure that the valve is in a tightly closed state, when the sensor detects the calibrated zero position, the motor does not stop rotating but defaults to this point as a zero-degree angle position. The preset program allows the stepper motor to rotate a set angle based on the zero-degree angle. This angle is a compensation angle calculated based on the accuracy of the sensor and the elastic deformation of the spring-type torque coupling, thereby generating sufficient torque, ensuring that the valve has sufficient tightening force without damaging the valve and the motor.

[0031] Preferably, the compensation angle is calculated based on the torque of the torque coupling and the operating conditions, and is adjusted by a controller. In this embodiment, it is 2-5 degrees.

[0032] The present invention drives the torque coupling through a stepper motor, and the torque coupling drives the four-way guide sleeve to rotate. After the four-way guide sleeve rotates, the needle valve ejector rotates and retracts in the guide sleeve to realize the opening and closing degree of the needle valve. When closing, the sensor sheet of the four-way guide sleeve is detected by the sensor, and it can be judged whether the needle valve is completely closed. During use, the device drives the rotation of the motor to adjust the opening and closing degree of the needle valve according to the electrical signal feedback from different usage conditions, so as to realize the precise and slow increase and decrease of the flow rate.

[0033] In the description of the invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0034] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] The components used in the present invention are all universal standard parts or components known to technical personnel in this field, and their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods, such as the coordination between the ejector pin and the valve core, the structure of the guide sleeve movably connected to the ejector pin, etc.

[0036] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the present invention.

Claims

1. A flow control regulating device, characterized in that: include: Bracket; A coupling, fixedly mounted on the rear of the bracket, wherein the coupling is a torsion coupling or an elastic coupling; A motor, connected and fixed to the rear end of the coupling; A guide sleeve, sleeved and connected to the front end of the coupling; An ejector pin fixing device is fixed to the front portion of the bracket; An ejector pin is mounted on the ejector pin fixing device; the rear end of the ejector pin is movably connected to the guide sleeve, and the front end of the ejector pin acts on the valve core of the flow valve; A sensor, fixedly mounted on the bracket, for detecting the rotation angle of the guide sleeve; A controller, receiving a sensor signal and controlling the operation of the motor; Initially, the flow valve is in a tightly closed state, and the initial valve position is calibrated as zero position by setting the sensor; When the sensor detects the calibrated zero position, the controller takes the zero position as a reference and continues to control the motor to drive the coupling to rotate another compensation angle, thereby generating sufficient torque to keep the valve in a tight and leak-proof state.

2. A flow control regulating device according to claim 1, characterized in that: The ejector pin fixing device is an ejector pin nut.

3. A flow control regulating device according to claim 1 or 2, characterized in that: The sensor is a potentiometer, the outer ring of the potentiometer is fixedly mounted on the bracket, and the inner ring is installed in cooperation with the guide sleeve, so that the guide sleeve drives the inner ring of the potentiometer to rotate.

4. A flow control regulating device according to claim 3, characterized in that: The potentiometer is an angle potentiometer.

5. A flow control regulating device according to claim 3 or 4, characterized in that: The outer ring of the potentiometer is provided with a mounting ear, and the potentiometer is mounted on the bracket through the mounting ear.

6. A flow control regulating device according to claim 1 or 2, characterized in that: The motor is a stepper motor or a servo motor.

7. A flow control regulating device according to claim 1, characterized in that: The guide sleeve is a square guide sleeve with a square central opening; The rear end of the ejector pin is a square column, which is clearance-matched with the square guide sleeve.

8. A method for regulating flow rate using the device of claim 1, characterized in that: Initially, the flow valve is in a tightly closed state, and the initial valve position is calibrated as zero position by setting the sensor; When the flow valve needs to be opened, the controller controls the motor, the motor drives the coupling, the coupling drives the guide sleeve to rotate, and then drives the ejector pin to open the valve of the flow valve. The motor is controlled to rotate forward or reversely as needed during the process, so as to achieve fine control of the flow of the flow valve; When the flow valve needs to be closed, the controller controls the motor to reverse. When the sensor detects the previously calibrated zero position, the controller uses the zero position as a reference and continues to control the motor to rotate a compensation angle to ensure that the valve is in a tight and leak-proof state.

9. A method for controlling flow rate according to claim 8, characterized in that: The compensation angle is 2-5 degrees.

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