CN111503346B

CN111503346B - Multifunctional electric valve controller

Info

Publication number: CN111503346B
Application number: CN202010293264.6A
Authority: CN
Inventors: 陈银
Original assignee: Dongguan Xiangke Intelligent Control Equipment Co ltd
Current assignee: Dongguan Zhenfa Electromechanical Air Conditioning Engineering Co ltd
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2021-10-26
Anticipated expiration: 2040-04-15
Also published as: CN111503346A

Abstract

The invention relates to a multifunctional electric valve controller, belonging to the field of electric valve controllers and comprising a transmission mechanism and a drive circuit; the transmission mechanism comprises a motor, a first worm, a second worm, a first gear disc, a second gear disc, a spring limiting seat, a shell, a volute spring and a valve control shaft lever; the driving circuit comprises a CPU, a forward contactor, a reverse contactor, a switch control circuit, a signal transmitter, a matrix keyboard circuit and a power circuit; realize the auto-lock of electrically operated valve after opening and shutting through the cooperation of worm and toothed disc, avoid the influence of pipeline rivers fluctuation to motor drive stability, secondly, compensate the switch dynamics of valve through the volute spring, can make the average application of force of butterfly valve when opening and shutting close, through micro-gap switch and drive circuit's design, the degree of opening and shutting and the specific angle of opening and shutting that makes CPU can be simple clear calculate the butterfly valve, improve the accuracy of valve to water flow control.

Description

Multifunctional electric valve controller

Technical Field

The invention relates to a multifunctional electric valve controller, and belongs to the field of electric valve controllers.

Background

The valve is widely applied to pipelines in various industries such as household residences, agricultural irrigation, industrial automation and the like. Valves commonly used at the end of a pipeline, such as stop valves, gate valves, angle valves, ball valves, etc., can be opened and closed or the flow of fluid can be controlled as desired by rotating a handle connected to a valve stem.

The electric valve controller is used for controlling the opening and closing of the electric valve. Generally, an industrial pipeline control system is controlled in a remote control room when a common electric valve installed in an industrial pipeline needs to be remotely controlled to automatically adjust the valve to be opened and closed according to the requirements of a production process. In the known prior art, the automatic regulation control assembly is composed of a display instrument, a regulation module, a power driving element, a control button and the like; the general automatic adjusting controller only has an automatic adjusting function, and a manual operator is additionally arranged when the electric valve needs to be opened and closed electrically or manually.

The butterfly valve is a valve of wide application in the pipeline, and the butterfly valve is when the switching two kinds of circumstances, because the pressure of the valve left and right sides is inequality, often causes the butterfly valve easy when opening, the condition of difficulty during the closure, and the electric control device of butterfly valve when selecting, often needs the bigger motor of selection moment, is unfavorable for the control of electric valve cost.

Disclosure of Invention

The invention aims to solve the problems and designs the invention, firstly, the self-locking of the electric valve after opening and closing is realized through the matching of the worm and the gear disc, the influence of the water flow fluctuation of a pipeline on the driving stability of the motor is avoided, secondly, the average force application of the butterfly valve during opening and closing is similar through the compensation of the opening and closing force of the valve by the volute spring, and through the design of the micro switch and the driving circuit, a CPU can simply and clearly calculate the opening and closing degree and the specific opening and closing angle of the butterfly valve, thereby improving the accuracy of the valve in controlling the water flow.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a multifunctional electric valve controller comprises a transmission mechanism and a driving circuit;

the transmission mechanism comprises a motor, a first worm, a second worm, a first gear disc, a second gear disc, a spring limiting seat, a shell, a volute spring and a valve control shaft lever; a gear cavity is formed in the shell, a first worm, a second worm, a first gear disc and a second gear disc are respectively arranged in the gear cavity, the first worm is meshed with the first gear disc, the second worm is meshed with the second gear disc, and the first gear disc is coaxially connected with the second worm; the second gear wheel disc is coaxially connected with a valve control shaft lever of the electric valve; the motor is arranged in the shell, and a rotating shaft of the motor is coaxially connected with the first worm through the connector and drives the first worm to rotate;

the spring limiting seat is in a multi-layer overlapped and mutually spaced wheel disc shape, the spring limiting seat is coaxially sleeved outside the valve control shaft lever and is fixedly connected with the valve control shaft lever, the volute spring is arranged at a gap at the wheel disc position of the spring limiting seat, the inner side of the volute spring is fixedly connected with the spring limiting seat, the outer side of the volute spring is fixedly connected with the shell, and the volute spring is in a compressed state and has potential energy for pushing the electric valve to close;

the first worm and the second worm are perpendicular to each other, a trigger is arranged at one end of the first worm, which is far away from the motor, a microswitch is arranged on the shell, and the microswitch corresponds to the trigger and is triggered to be opened and closed by the trigger;

the driving circuit comprises a CPU, a forward contactor, a reverse contactor, a switch control circuit, a signal transmitter, a matrix keyboard circuit and a power circuit; the forward contactor and the reverse contactor are respectively connected between the motor and the power supply and are respectively used for controlling the motor to rotate forward and backward; the switch control circuit is respectively and electrically connected with the forward contactor and the reverse contactor and used for supplying power to one of the forward contactor and the reverse contactor, and the CPU is respectively and electrically connected with the power circuit, the signal transmitter, the matrix keyboard circuit, the micro switch and the switch control circuit; the electric motor rotates every circle to trigger the micro switch to be opened and closed once, and the CPU calculates the opening and closing degree of the electric valve according to the opening and closing times of the micro switch and the gear ratio of the transmission mechanism.

Further, the first worm rotates for a circle, and the rotation angle of the first gear disc is 3-5 degrees; the second worm rotates for a circle, and the rotation angle of the second gear disc is 3-5 degrees.

Further, the signal transmitter outputs a current signal of 4-20 mA.

Furthermore, an elastic compensation cavity is arranged in the shell, the spring limiting seat is arranged in the elastic compensation cavity, 3-5 intervals for accommodating the volute springs are arranged on the spring limiting seat, and connection points of the volute springs and the elastic compensation cavity are uniformly distributed on the circumferential direction of the side wall of the elastic compensation cavity.

Furthermore, a touch cavity is arranged in the shell and is separated from the gear cavity, and the end part of the first worm penetrates through the side wall of the gear cavity and extends into the touch cavity; the microswitch is arranged on the side wall of the touch cavity, and the trigger is arranged at the part of the first worm extending into the touch cavity.

Further, a thermal protection switch is provided in the motor, the thermal protection switch is electrically connected to the CPU, and when the motor is overheated, the CPU controls the switch control circuit to cut off the power supply to the forward contactor or the reverse contactor.

The invention has the beneficial effects that:

1. the invention is designed aiming at that the valve is easy to reversely push the valve control shaft lever to rotate under the action of water pressure because the moment of the valve is larger in the opening and closing process of the butterfly valve, the self-locking of the electric valve after the opening and closing is realized by utilizing the matching of the worm and the gear disc, the rotation direction can only drive the gear disc through the worm without causing the phenomenon that the gear disc drives the worm, and further, the influence of water pressure fluctuation on the driving stability of the motor in the opening and closing process is avoided;

2. the matching of the two sets of worms and the gear disc is used, the first worm has the function of triggering the micro switch, and the meshing part of the second worm and the second gear disc is easy to wear on the butterfly valve with larger moment, and the second worm and the second gear disc are directly replaced, compared with the first worm, so that the replacement is more convenient, the maintenance cost is lower, and through the transmission relationship of the multiple sets, not only are the transmission gears more, but also the size requirement of the gear disc is smaller, so that the size of the electric valve controller is smaller;

3. the spiral spring is used for compensating the opening and closing force of the valve, and the spiral spring with proper potential energy can be adopted, so that the power required to be released by the motor when the butterfly valve is opened is similar to the power required to be released by the motor when the butterfly valve is closed and opened;

4. through the design of the micro switch and the driving circuit, the CPU can simply and clearly calculate the opening and closing degree and the specific opening and closing angle of the butterfly valve, and the accuracy of the valve for controlling the water flow is improved.

Drawings

FIG. 1 is a structural diagram of a driving circuit of the multifunctional electric valve controller;

fig. 2 is an exemplary diagram of a transmission mechanism of the multifunctional electrically operated valve controller.

Reference numerals: 1-motor, 2-connector, 3-first worm, 4-gear cavity, 5-micro switch, 6-trigger, 7-second worm, 8-first gear disc, 9-second gear disc, 10-spring limit seat, 11-shell, 12-volute spring, 13-valve control shaft lever, 14-forward contactor, 15-reverse contactor, 16-switch control circuit, 17-signal transmitter, 18-matrix keyboard circuit, 19-power circuit and 20-thermal protection switch.

Detailed Description

As shown in the attached drawings, the invention relates to a multifunctional electric valve controller, which comprises a transmission mechanism and a driving circuit.

The transmission mechanism comprises a motor 1, a first worm 3, a second worm 7, a first gear disc 8, a second gear disc 9, a spring limiting seat 10, a shell, a volute spring 12 and a valve control shaft lever 13.

A gear cavity 4, a touch cavity and an elastic compensation cavity are arranged in the shell.

The first worm 3, the second worm 7, the first gear disc 8 and the second gear disc 9 are respectively arranged in the gear cavity 4, the first worm 3 and the second worm 7 are vertical to each other, the first worm 3 is meshed with the first gear disc 8, the second worm 7 is meshed with the second gear disc 9, and the first gear disc 8 is coaxially connected with the second worm 7; the second gear disc 9 is coaxially connected with a valve control shaft lever 13 of the electric valve; the first worm 3 rotates for a circle, and the rotation angle of the first gear disc 8 is 3-5 degrees; the second worm 7 rotates for a circle, and the rotation angle of the second gear wheel disc 9 is 3-5 degrees.

An electric motor 1 is also arranged in the shell, and the rotating shaft of the electric motor 1 is coaxially connected with a first worm 3 through a connector 2 and drives the first worm 3 to rotate.

An elastic force compensation cavity is arranged in the shell, the spring limiting seat 10 is arranged in the elastic force compensation cavity, the spring limiting seats 10 are in a disc shape which is overlapped in multiple layers and spaced from each other, the spring limiting seat 10 is coaxially sleeved outside the valve control shaft rod 13 and fixedly connected with the valve control shaft rod, the spiral springs 12 are arranged at intervals of the disc position of the spring limiting seat 10, the number of the intervals is 3-5, each interval is internally provided with a spiral spring 12, the inner side of each spiral spring 12 is fixedly connected with the spring limiting seat 10, the outer side of each spiral spring 12 is fixedly connected with the shell, connecting points of each spiral spring 12 and the elastic force compensation cavity are uniformly distributed on the circumferential direction of the side wall of the elastic force compensation cavity, and each spiral spring 12 is in a compression state and has potential energy for pushing the electric valve to be closed; the spiral spring 12 with proper potential energy can be adopted to compensate the opening and closing force of the valve through the spiral spring 12, so that the power required to be released by the motor 1 when the butterfly valve is opened is similar to the power required to be released by the motor 1 when the butterfly valve is closed.

A touch cavity is also arranged in the shell, the touch cavity is separated from the gear cavity 4, and the end part of the first worm 3 passes through the side wall of the gear cavity 4 and extends into the touch cavity; the microswitch 5 is arranged on the side wall of the touch cavity, the trigger 6 is arranged at one end of the first worm 3 far away from the motor 1, the trigger 6 is arranged at the part of the first worm 3 extending into the touch cavity, the microswitch 5 corresponds to the trigger 6 and is triggered to open and close by the trigger 6, and the microswitch 5 and the driving circuit are designed, so that the CPU can simply and clearly calculate the opening and closing degree and the specific opening and closing angle of the butterfly valve, and the accuracy of the valve in controlling the water flow is improved.

The driving circuit comprises a CPU, a forward contactor 14, a reverse contactor 15, a switch control circuit 16, a signal transmitter 17, a matrix keyboard circuit 18 and a power circuit 19; the forward contactor 14 and the reverse contactor 15 are respectively connected between the motor 1 and a power supply and are respectively used for controlling the motor 1 to rotate forward and backward; the switch control circuit 16 is respectively electrically connected with the forward contactor 14 and the reverse contactor 15 and used for supplying power to one of the forward contactor and the reverse contactor, and the CPU is respectively electrically connected with the power circuit 19, the signal transmitter 17, the matrix keyboard circuit 18, the microswitch 5 and the switch control circuit 16; the electric motor 1 rotates every week to trigger the micro switch 5 to open and close once, and the CPU calculates the opening and closing degree of the electric valve through the opening and closing times of the micro switch 5 and the gear ratio of the transmission mechanism; the signal transmitter 17 outputs a 4-20mA current signal, and the signal data may include electric valve position information, current status, history, etc.

A thermal protection switch 20 is provided in the motor 1, the thermal protection switch 20 is electrically connected to the CPU, and when the motor 1 is overheated, the CPU controls the switch control circuit 16 to cut off the power supply to the forward contactor 14 or the reverse contactor 15. The foregoing examples are provided for clarity of illustration only and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are intended to be within the scope of the invention.

Claims

1. A multifunctional electric valve controller is characterized by comprising a transmission mechanism and a driving circuit; the transmission mechanism comprises a motor (1), a first worm (3), a second worm (7), a first gear disc (8), a second gear disc (9), a spring limiting seat (10), a shell, a volute spring (12) and a valve control shaft lever (13); a gear cavity (4) is formed in the shell, a first worm (3), a second worm (7), a first gear disc (8) and a second gear disc (9) are respectively arranged in the gear cavity (4), the first worm (3) is meshed with the first gear disc (8), the second worm (7) is meshed with the second gear disc (9), and the first gear disc (8) is coaxially connected with the second worm (7); the second gear disc (9) is coaxially connected with a valve control shaft lever (13) of the electric valve; the motor (1) is arranged in the shell, and a rotating shaft of the motor (1) is coaxially connected with the first worm (3) through the connector (2) and drives the first worm (3) to rotate; the spring limiting seat (10) is in a multi-layer overlapped and mutually spaced wheel disc shape, the spring limiting seat (10) is coaxially sleeved outside the valve control shaft rod (13) and is fixedly connected with the valve control shaft rod, the volute spring (12) is arranged at the interval of the wheel disc of the spring limiting seat (10), the inner side of the volute spring (12) is fixedly connected with the spring limiting seat (10), the outer side of the volute spring (12) is fixedly connected with the shell, and the volute spring (12) is in a compressed state and has potential energy for pushing the electric valve to close; the first worm (3) and the second worm (7) are perpendicular to each other, a trigger (6) is arranged at one end, away from the motor (1), of the first worm (3), a microswitch (5) is arranged on the shell, and the microswitch (5) corresponds to the trigger (6) and is triggered to be opened and closed by the trigger (6); the driving circuit comprises a CPU, a forward contactor (14), a reverse contactor (15), a switch control circuit (16), a signal transmitter (17), a matrix keyboard circuit (18) and a power circuit (19); the forward contactor (14) and the reverse contactor (15) are respectively connected between the motor (1) and a power supply and are respectively used for controlling the motor (1) to rotate forward and backward; the switch control circuit (16) is respectively and electrically connected with the forward contactor (14) and the reverse contactor (15) and used for supplying power to one of the forward contactor and the reverse contactor, and the CPU is respectively and electrically connected with the power circuit (19), the signal transmitter (17), the matrix keyboard circuit (18), the micro switch (5) and the switch control circuit (16); the electric motor (1) rotates every circle to trigger the micro switch (5) to open and close once, and the CPU calculates the opening and closing degree of the electric valve through the opening and closing times of the micro switch (5) and the gear ratio of the transmission mechanism.

2. The multi-functional electrically operated valve controller of claim 1, characterized by, the first worm (3) rotates a round, the first gear plate (8) turns the angle 3-5 degrees; the second worm (7) rotates for a circle, and the rotation angle of the second gear disc (9) is 3-5 degrees.

3. A multi-function electrically operated valve controller as recited in claim 2 wherein the signal transmitter (17) outputs a 4-20mA current signal.

4. The multi-functional electrically operated valve controller of claim 1, characterized in that there is a spring compensation chamber in the housing, the spring retainer (10) is disposed in the spring compensation chamber, and there are 3-5 spaces for accommodating the volute springs (12) on the spring retainer (10), and the connection points of the volute springs (12) and the spring compensation chamber are evenly distributed on the side wall of the spring compensation chamber in the circumferential direction.

5. A multifunctional electric valve controller as claimed in claim 1, wherein a triggering chamber is further provided in the housing, the triggering chamber being separated from the gear chamber (4), the end of the first worm (3) passing through the side wall of the gear chamber (4) and extending into the triggering chamber; the microswitch (5) is arranged on the side wall of the touch cavity, and the trigger (6) is arranged at the part of the first worm (3) extending into the touch cavity.

6. Multifunction electric valve controller according to claim 1, characterized in that a thermal protection switch (20) is provided in the electric motor (1), which thermal protection switch (20) is electrically connected to the CPU, which CPU controls the switch control circuit (16) to disconnect the supply of power to the forward contactor (14) or to the reverse contactor (15) when the electric motor (1) is overheated.