Self-adaptive stroke gas valve control device

Abstract

The utility model relates to a valve, and provides a self-adaptive stroke gas valve control device, which comprises a singlechip control circuit, a current detection circuit, a motor driving circuit and a gas valve switch manipulator, the gas valve opening and closing manipulator is connected with an opening and closing handle of the gas valve to drive the opening and closing handle of the gas valve to rotate to open the gas valve or close the gas valve, and the single chip microcomputer control circuit is connected with the gas valve opening and closing manipulator through the motor driving circuit and drives and controls the gas valve opening and closing manipulator. The current detection circuit is connected with the motor driving circuit to detect the current change of the motor driving circuit, and the current detection circuit is connected with the input end of the single chip microcomputer control circuit. The gas valve control device solves the problem that an existing gas valve control device is prone to damage in use or high in manufacturing cost.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a gas valve control device with an adaptive stroke. Background Art

[0002] At present, traditional gas detectors can send out an alarm signal when detecting that the concentration of the measured gas in the environment exceeds the threshold. At the same time, the gas valve control device (hereinafter referred to as the valve control device) set in the gas detector controls the valve switch handle to close the gas valve, thereby automatically preventing the gas from leaking further in an unattended environment. Traditional valve control devices generally use a delay control method or a limit control method when controlling the closing of the gas valve.

[0003] The delay control method is to control the operation of the motor of the gas valve switch manipulator to drive the switch handle of the gas valve to close the gas valve, and then stop the motor operation after a fixed delay. Since the manufacturers of gas valve switch manipulators are uneven, the motor operation speed, mechanical error inside the mechanical system and other standards are different, and even the gas valve switch manipulators produced by the same manufacturer may have individual differences, if the delay is set too long, the motor of the gas valve switch manipulator will still receive the running signal after reaching the end of the stroke (that is, the position of completely closing the valve). At this time, the motor will be blocked for a long time and cause irreversible damage to the valve control device or the gas valve switch manipulator; if the delay is set too short, the motor of the gas valve switch manipulator will receive the stop signal before reaching the end of the stroke (that is, the position of completely closing the valve), the valve cannot be completely closed, and the gas will continue to leak.

[0004] The control method with limit requires adding a limit sensor to the gas valve switch robot, which can give a limit signal and stop the motor after the gas valve switch robot motor reaches the closed position. However, it increases the component cost, production cost and installation cost of the limit sensor, resulting in a waste of resources. Utility Model Content

[0005] Therefore, in view of the above problems, the utility model proposes a gas valve control device with a simple structure, which can effectively close the gas valve to prevent leakage and does not require a limit sensor and has a low production cost and an adaptive stroke.

[0006] To solve this technical problem, the utility model adopts the following solution: a gas valve control device with adaptive stroke, including a single-chip control circuit, a current detection circuit, a motor drive circuit and a gas valve switch manipulator, the gas valve switch manipulator is connected to the switch handle of the gas valve to drive the switch handle of the gas valve to rotate to open or close the gas valve, the single-chip control circuit is connected to and drives the gas valve switch manipulator through the motor drive circuit, the current detection circuit is connected to the motor drive circuit to detect the current change of the motor drive circuit, and the current detection circuit is connected to the input end of the single-chip control circuit.

[0007] A further improvement is that the gas valve switch manipulator includes a mounting base, a motor and a rotating arm. The mounting base is fixed on a pipe connected to the gas valve. The motor is arranged on the mounting base and the output end of the motor is connected to one end of the rotating arm to drive the rotating arm to rotate forward and reversely. The other end of the rotating arm is connected to the switch handle of the gas valve.

[0008] As a further improvement, the rotating arm is connected to the switch handle of the gas valve via a limiting connecting piece.

[0009] As a further improvement, the limit connecting member is a retaining screw clamped on both sides of the switch handle of the gas valve.

[0010] As a further improvement, the gas valve switch manipulator also includes an electromagnetic automatic clutch, the output end of the motor is connected to the rotating arm via the clutch, and the electromagnetic automatic clutch is connected to and controlled by the single-chip microcomputer control circuit.

[0011] As a further improvement, the single chip microcomputer control circuit is a BA45F6753 chip and its peripheral circuits.

[0012] By adopting the above-mentioned technical scheme, the beneficial effects of the utility model are as follows: the current change of the motor drive circuit is detected in real time through the current detection circuit such as the sampling resistor, and the current change is fed back to the single-chip control circuit, so that when the motor drive circuit is connected and drives the control gas valve switch manipulator to close the switch handle of the gas valve, it can be determined that the valve stroke has reached the end of the stroke according to the sharp change of the current, so that the single-chip control circuit controls the motor drive circuit to stop running, so that the gas valve control device of the utility model can adapt to gas valve switch manipulators with different strokes: gas valve switch manipulators with different strokes can be directly adapted to ensure that when reaching the end of the stroke, no long-term stalling will occur, and the circuit overload will be avoided to cause damage to the gas valve switch manipulator or the gas valve control device, without increasing the cost, and it is suitable for various gas valve switch manipulators of different models and different operating speeds, without the need to install additional limit sensors, the cost is low, the structure is simple, and the gas valve can be effectively closed to avoid leakage. An electromagnetic automatic clutch is arranged on the gas valve switch manipulator, so that the user can realize manual control when not using automatic closing or opening of the gas valve, which is more convenient to use and can be widely promoted and applied. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0014] Figure 2 This is a curve diagram of current variation during the valve closing process of an embodiment of the utility model;

[0015] Figure 3 It is a partial circuit schematic diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0016] The utility model is now further described in conjunction with the accompanying drawings and specific implementation methods.

[0017] refer to Figure 1-Figure 3The preferred adaptive stroke gas valve control device of the utility model comprises a single-chip control circuit 1, a current detection circuit 2, a motor drive circuit 3 and a gas valve switch manipulator, the gas valve switch manipulator is connected to a switch handle 51 of a gas valve 5 to drive the switch handle 51 of the gas valve 5 to rotate to open or close the gas valve 5, the gas valve 5 is a gas ball valve, the single-chip control circuit 1 is a BA45F6753 chip and its peripheral circuits, the single-chip control circuit 1 is connected to and drives the control gas valve switch manipulator via the motor drive circuit 3, the current detection circuit 2 is connected to the motor drive circuit 3 to detect the current change of the motor drive circuit 3, the current detection circuit 2 and the single-chip control circuit 1 is connected to the input end, the current detection circuit 2 is a sampling resistor, the gas valve switch manipulator includes a mounting seat 41, a motor 42, an electromagnetic automatic clutch 43 and a rotating arm 44, the mounting seat 41 is fixedly arranged on the pipeline connected to the gas valve 5, the motor 42 is arranged on the mounting seat 41, and the output end of the motor 42 is connected to one end of the rotating arm 44 through the electromagnetic automatic clutch 43 to drive the rotating arm 44 to rotate forward and reversely, the electromagnetic automatic clutch 43 is connected to and controlled by the single-chip control circuit 1, the other end of the rotating arm 44 is provided with a limit connector 441, the rotating arm 44 is connected to the switch handle 51 of the gas valve 5 through the limit connector 441, and the limit connector 441 is a clamping screw clamped on both sides of the switch handle 51 of the gas valve 5.

[0018] Working principle: When the gas valve 5 is to be closed, the 19th pin of the single-chip control circuit 1 outputs the valve control signal to the motor drive circuit 3, and the motor 42 of the gas valve switch manipulator that closes the gas valve 5 starts to run. The current detection circuit 2 collects the current information of the motor 42 through the sampling resistor. The larger the current, the larger the voltage across the sampling resistor. At this time, the current signal is converted into a voltage signal and sent to the 11th pin of the single-chip control circuit 1. The analog signal is converted into a digital signal through the built-in ADC analog-to-digital converter (Analog-to-Digital Converter) of the single-chip control circuit 1, and the current change during the valve closing process is calculated and judged by the program. Figure 2 As shown, when a current peak is detected, it is determined that the motor 42 has reached the end of its stroke. At this time, the single-chip control circuit 1 immediately controls the motor 42 to stop running through the motor drive circuit 3. In this way, the gas valve control device can adapt to the valve closing of motors with different strokes without increasing costs, and avoid motor or circuit overload damage caused by long-term stalling.

[0019] The gas valve in the utility model can also be other valves for controlling gas flow or closing gas flow, and the free end of the rotating arm can also be connected to the switch handle of the gas valve by other structures with equivalent functions. The single chip control circuit can also be controlled by the system controller connected to the gas detector.

[0020] Although the present invention has been specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes may be made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. An adaptive stroke gas valve control device, comprising a single chip control circuit, a current detection circuit, a motor drive circuit and a gas valve switch manipulator, the gas valve switch manipulator is connected to the switch handle of the gas valve to drive the switch handle of the gas valve to rotate to open or close the gas valve, characterized in that: The single-chip control circuit is connected to and drives the gas valve switch manipulator via the motor drive circuit. The current detection circuit is connected to the motor drive circuit to detect the current change of the motor drive circuit. The current detection circuit is connected to the input end of the single-chip control circuit.

2. The gas valve control device with adaptive stroke according to claim 1, characterized in that: The gas valve switch robot includes a mounting seat, a motor and a rotating arm. The mounting seat is fixed on a pipeline connected to the gas valve. The motor is arranged on the mounting seat and the output end of the motor is connected to one end of the rotating arm to drive the rotating arm to rotate forward and reversely. The other end of the rotating arm is connected to the switch handle of the gas valve.

3. The self-adaptive stroke gas valve control device according to claim 2, characterized in that: The rotating arm is connected to the switch handle of the gas valve via a limiting connecting piece.

4. The self-adaptive stroke gas valve control device according to claim 3, characterized in that: The limit connecting piece is a clamping screw clamped on both sides of the switch handle of the gas valve.

5. The self-adaptive stroke gas valve control device according to claim 2, characterized in that: The gas valve switch manipulator also includes an electromagnetic automatic clutch, the output end of the motor is connected to the rotating arm via the clutch, and the electromagnetic automatic clutch is connected to and controlled by the single-chip microcomputer control circuit.

6. The self-adaptive stroke gas valve control device according to claim 1, characterized in that: The single chip control circuit is the BA45F6753 chip and its peripheral circuits.

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