Testing instrument and testing method for functional state of electrically operated valve

Abstract

The invention relates to the technical field of mechanical maintenance, in particular to an instrument and a method for testing the functional state of an electrically operated valve. The test instrument for the functional state of the electric valve comprises a local control device used for receiving and issuing instructions; the local control device comprises a data acquisition control unit and an interface unit; the data acquisition control unit is connected with the interface unit; the data acquisition control unit sends a test control instruction through the interface unit, and the test control instruction is used for adjusting an input power supply of the electric valve; and the data acquisition control unit acquires state data and input current data of the electric valve through the interface unit, and performs early warning monitoring on the state data and the input current data. On-site operation of the electric valve is achieved, debugging and diagnosis work can be completed only by one group of personnel, human input is reduced, the construction period is shortened, personnel communication is not needed any more, the risk of communication failure is avoided, and safety is improved.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical maintenance, and in particular to a testing instrument and a testing method for the functional status of an electric valve. Background Art

[0002] After the electric valve is repaired, it must be debugged. During debugging, the electric valve needs to be frequently operated from the electric valve MCC (Motor Control Center) cabinet or DCS (Distributed Control System), and the parameters of the electric valve need to be measured, adjusted, and recorded on-site. At least two groups of people are required to complete this work. In addition, the MCC and DCS in the nuclear power plant are in different workshops, which are far away from the electric valve. Some valve workshops cannot communicate or communication is inconvenient. It takes a lot of manpower and a long construction period to complete the debugging of a single electric valve. In addition, due to poor communication, there is a risk of communication failure, which may damage the valve and burn the motor. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a testing instrument and a testing method for the functional status of an electric valve.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a test instrument for the functional status of an electric valve, comprising: a local control device for receiving and issuing instructions;

[0005] The local control device comprises a data acquisition control unit and an interface unit; the data acquisition control unit is connected to the interface unit;

[0006] The data acquisition control unit issues a test control instruction through the interface unit, and the test control instruction is used to adjust the input power supply of the electric valve;

[0007] The data acquisition control unit acquires the state data and input current data of the electric valve through the interface unit, and performs early warning monitoring on the state data and the input current data.

[0008] Preferably, it further comprises: a control drive unit for driving the electric valve;

[0009] The control driving unit comprises: a first control instruction receiving port;

[0010] The interface unit comprises: a control instruction sending port connected to the first control instruction receiving port;

[0011] The test control instructions include switch instructions;

[0012] The data acquisition control unit sends the switch instruction to the control drive unit through the control instruction sending port; the control drive unit receives the switch instruction output by the local control device and provides corresponding input power to the electric valve.

[0013] Preferably, the control drive unit comprises: an electric valve;

[0014] The local control device further includes: an alarm unit; the interface unit further includes a valve status input interface;

[0015] The valve state input interface is connected to the valve state output interface and the data acquisition control unit;

[0016] The valve status input interface transmits the received valve information to the data acquisition control unit; when the data acquisition control unit detects that the valve status signal is abnormal, the abnormal protection is triggered, and the data acquisition control unit sends a reset instruction and a locking instruction to the control instruction sending port;

[0017] The first control instruction receiving port sends the reset instruction and the locking instruction to the electric valve to control the reset and locking of the electric valve;

[0018] The data acquisition control unit sends an abnormal alarm instruction to the alarm unit to send out an audible and visual alarm signal.

[0019] Preferably, the control drive unit comprises: a power input terminal, a power output terminal, a phase sequence adjustment module, and a controllable three-phase power switch;

[0020] The phase sequence adjustment module and the controllable three-phase power switch are connected to the first control instruction receiving port;

[0021] The power input end and the power output end are electrically connected via the phase sequence adjustment module and the controllable three-phase power switch;

[0022] The power input terminal is connected to an external power supply;

[0023] The controllable three-phase power switch electrically connects or disconnects the external power supply and the phase sequence adjustment module according to the switch instruction;

[0024] The phase sequence adjustment module adjusts the phase sequence of the three-phase power transmitted by the controllable three-phase power switch according to the phase sequence requirement in the switch instruction; the phase sequence adjustment module outputs the three-phase power of the corresponding phase sequence to the power output end, drives the electric valve motor to rotate forward or reverse, and realizes the switch control function of the electric valve.

[0025] Preferably, the control drive unit further includes: a three-phase current output port and a current transformer;

[0026] The interface unit comprises: a three-phase current input port;

[0027] The three-phase current input port is connected to the three-phase current output port;

[0028] The current transformer collects the current signal between the power input terminal and the controllable three-phase power switch;

[0029] The current transformer transmits the current signal to the three-phase current output port through the three-phase current input port;

[0030] The three-phase current output port transmits the current signal to the data acquisition control unit;

[0031] When the data acquisition control unit detects that the value of any phase of the three-phase current is greater than the set overcurrent protection constant, the overcurrent protection is triggered, and the data acquisition control unit sends a reset instruction and a locking instruction to the control instruction sending port;

[0032] The first control instruction receiving port sends the reset instruction and the locking instruction to the electric valve to control the reset and locking of the electric valve;

[0033] The data acquisition control unit sends an overcurrent alarm instruction to the alarm unit to send out an audible and visual alarm signal.

[0034] Preferably, the control drive unit further includes: a three-phase input and output voltage detection module and a three-phase voltage output port;

[0035] The interface unit further includes: a three-phase voltage input port;

[0036] The three-phase voltage output port is connected to the three-phase voltage input port;

[0037] The three-phase input and output voltage detection module obtains the voltage data of the power input end and the power output end and transmits it to the data acquisition control unit through the three-phase voltage input port; when the data acquisition control unit detects that the phase sequence of the three-phase voltage is reversed, the data acquisition control unit sends the reverse sequence alarm instruction to the alarm unit; the alarm unit sends a reverse sequence optical alarm signal.

[0038] Preferably, it also includes: a connector for controlling the switch of the electric valve;

[0039] The connector includes a valve external socket, an electric valve access plug, a first valve state output interface and a second control instruction receiving port;

[0040] The local control device further comprises: a valve state input interface; the valve state input interface is connected to the first valve state output interface and the data acquisition control unit;

[0041] The valve status input interface transmits the received valve information to the data acquisition control unit;

[0042] The second control instruction receiving port is connected to the control instruction sending port;

[0043] The valve external socket is connected to the power input terminal;

[0044] The electric valve access plug is connected to the power output terminal;

[0045] The electric valve access plug also transmits the valve information to the first valve state output interface through a signal cable and is connected to the valve state output interface;

[0046] The switch instruction sent by the data acquisition control unit is sent to the electric valve through the second control instruction receiving port.

[0047] Preferably, it also includes: a laser displacement sensor for monitoring the displacement of the valve stem of the electric valve;

[0048] The interface unit further includes: a displacement port;

[0049] The displacement port is connected to the displacement laser displacement sensor and the data acquisition control unit;

[0050] When the data acquisition control unit monitors that the engineering quantity change trend of the displacement laser displacement sensor does not conform to the switch instruction issued by the data acquisition control unit, the reverse protection is triggered, and the data acquisition control unit sends a reset instruction and a locking instruction to the control instruction sending port, and the data acquisition control unit sends a reverse alarm instruction to the alarm unit to emit an audible and visual alarm signal.

[0051] Preferably, the local control device further comprises: a power supply module for providing power to the local control device;

[0052] The power module includes a rechargeable battery and a charging interface;

[0053] The rechargeable battery is connected to the data acquisition control unit and the charging interface.

[0054] The present invention also provides a method for testing the functional status of an electric valve, comprising:

[0055] The electric valve function status is tested using any of the electric valve function status testing instruments described above to obtain the test result of the electric valve.

[0056] The implementation of the present invention has the following beneficial effects:

[0057] The present invention constructs a test instrument for the functional status of an electric valve through an on-site control device for receiving and issuing instructions. The on-site control device includes a data acquisition control unit and an interface unit. The data acquisition control unit issues a test control instruction through the interface unit, and the test control instruction is used to adjust the input power of the electric valve. The input power of the electric valve can be adjusted through the on-site control device, and the on-site operation of the electric valve is realized. Only one group of personnel is needed to complete the debugging and diagnosis work, which reduces manpower input, shortens the construction period, eliminates the need for personnel communication, avoids the risk of communication failure, and improves safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0059] Figure 1 A structural diagram of a test instrument for the functional status of an electric valve in one embodiment;

[0060] Figure 2 A connection diagram of a control drive unit and a local control device in one embodiment;

[0061] Figure 3 is a structural diagram of a control drive unit in one embodiment;

[0062] Figure 4 is a structural diagram of a connector in one embodiment;

[0063] Figure 5 It is a structural diagram of a local control device in one embodiment. DETAILED DESCRIPTION

[0064] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0065] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

[0066] The test instrument for the functional status of an electric valve provided by the embodiment of the present invention is as follows: Figure 1As shown, it includes: a local control device for receiving and issuing instructions.

[0067] Specifically, local control devices refer to control panels, desks or operating equipment arranged near the controlled objects. Local control devices can realize local monitoring and control of electric valves.

[0068] The local control device comprises a data acquisition control unit and an interface unit. The data acquisition control unit is connected with the interface unit.

[0069] It should be noted that the data acquisition control unit is responsible for collecting and processing various signals from the electric valve, while the interface unit is responsible for communicating with the electric valve and other devices or equipment to achieve data transmission and reception.

[0070] The data acquisition control unit sends out a test control instruction through the interface unit, and the test control instruction is used to adjust the input power supply of the electric valve.

[0071] In some scenarios, the test control instructions are also used to control the operating status of the electric valve.

[0072] The data acquisition control unit acquires the state data and input current data of the electric valve through the interface unit, and performs early warning monitoring on the state data and input current data.

[0073] The present invention is connected to the electric valve through a data acquisition control unit and an interface unit, and controls the electric valve. The data acquisition control unit sends a test control instruction through the interface unit, and the test control instruction is used to adjust the input power of the electric valve. The input power of the electric valve can be adjusted through the local control device, and the electric valve is operated locally. The maintenance and debugging work of the electric valve only requires one group of personnel to complete the debugging and diagnosis work, which reduces manpower input, shortens the construction period, eliminates the need for personnel communication, avoids the risk of communication failure, and improves safety.

[0074] In some executable embodiments, it also includes: a control drive unit for driving the electric valve.

[0075] Optionally, the control drive unit is used to debug and diagnose the electric valve using local maintenance power when the MCC cabinet is unavailable.

[0076] The control driving unit comprises: a first control instruction receiving port.

[0077] It can be understood that the control drive unit receives the test control instruction output by the local control device through the first control instruction receiving port.

[0078] The interface unit includes: a control instruction sending port connected to the first control instruction receiving port.

[0079] It can be understood that the first control instruction receiving port is used to receive the test control instructions, and the control instruction sending port is used to send these test control instructions, thereby ensuring that the test control instructions can be accurately transmitted from the local control device to the control drive unit.

[0080] The test control instructions include switch instructions.

[0081] Optionally, the switch command includes a point-operated opening command, a point-operated closing command, a travel opening command, a travel closing command, a torque opening command, and a torque closing command. The test control command also includes an R / L switching command, a phase sequence adjustment command, an emergency stop command, and the like.

[0082] Specifically, the point-operated opening instruction is used to open the electric valve in a small range. The point-operated closing instruction: opposite to the point-operated opening instruction, it is used to close the electric valve in a small range.

[0083] The travel open command is used to control the device to open when it reaches a predetermined travel position, and is usually used in conjunction with a travel switch. The travel close command is used to control the device to close when it reaches a predetermined travel position.

[0084] Torque opening command is used to open the electric valve when a certain torque is reached. Torque closing command: opposite to torque opening command, it is used to close the electric valve when a certain torque is reached. R / L switching command is used to switch between right and left rotation, usually used to control the motor rotation direction of the electric valve.

[0085] The phase sequence adjustment instruction is used to adjust the phase sequence in the three-phase AC system to ensure the normal operation and protection of the electric valve. The correctness of the phase sequence plays a vital role in the operation and protection of the electric valve.

[0086] The emergency stop command is a safety command used to quickly stop equipment operation in an emergency to prevent accidents or damage.

[0087] The data acquisition control unit sends the switch command to the control drive unit through the control command sending port. The control drive unit receives the switch command output by the local control device and provides the corresponding input power to the electric valve.

[0088] The present invention realizes the switching of the electric valve by combining the local control device with the control drive unit, thereby realizing the local operation of the electric valve, ensuring the precise control of the electric valve and improving the safety.

[0089] In some executable embodiments, the local control device further includes: an alarm unit; and an interface unit further includes a valve status input interface.

[0090] It is understood that the alarm unit is a component of the local control device, which is used to issue an alarm when an abnormal situation is detected. These abnormal situations may include electric valve failure, abnormal phase sequence, etc.

[0091] Optionally, the alarm unit may be an audible and visual alarm, or an alarm signal sent to a control center, or an electronic component or device with a reminder effect, so that operators can respond in time.

[0092] The valve state input interface is connected with the valve state output interface and the data acquisition control unit.

[0093] As you can understand, the valve status input interface collects valve status data such as opening and pressure in real time, and feeds it back to the data acquisition control unit through the valve status output interface to ensure the accuracy of operation. At the same time, it supports remote control and automation, reduces the need for on-site operation, and reduces labor costs. In addition, the data acquisition control unit can perform fault diagnosis, improve safety, and reduce accident risks.

[0094] The valve status input interface transmits the received valve information to the data acquisition control unit. When the data acquisition control unit detects that the valve status signal is abnormal, the abnormal protection is triggered, and the data acquisition control unit sends the reset command and the locking command to the control command sending port. The first control command receiving port sends the reset command and the locking command to the electric valve to control the reset and locking of the electric valve.

[0095] Reset refers to the ability of the valve to automatically return to a preset safe position (usually the closed position) when the electric valve loses power or fails. Depending on the design of the electric valve and the application requirements, reset can be automatic or manual. Automatic reset is usually achieved through a built-in spring mechanism or other automatic return device, while manual reset requires the operator to manually adjust the valve to a safe position after power failure.

[0096] The latching function ensures that the electric valve remains in its current position when it receives a latching command and does not change state due to external interference or power failure. It is very important for the stability and safety of the commissioning and maintenance of the electric valve process. The latching can be mechanical or electronic. Mechanical latching may involve a locking device such as a locking pin or locking nut, while electronic latching may involve the electric valve using a special control signal or software setting to maintain the valve position.

[0097] The data acquisition control unit sends an abnormal alarm instruction to the alarm unit to send out an audible and visual alarm signal.

[0098] The sound and light alarm signals are sent out simultaneously through visual and auditory means, which improves the intuitiveness and perception of the alarm, allowing personnel working in complex or noisy environments to quickly perceive the alarm.

[0099] In some executable embodiments, the control drive unit includes: a power input terminal, a power output terminal, a phase sequence adjustment module, and a controllable three-phase power switch.

[0100] The phase sequence adjustment module and the controllable three-phase power switch are connected to the first control instruction receiving port.

[0101] The power input terminal and the power output terminal are electrically connected via a phase sequence adjustment module and a controllable three-phase power switch.

[0102] The power input terminal is connected to an external power source.

[0103] Optionally, the external power supply includes an on-site maintenance power supply. By controlling the input end of the drive unit, when the MCC cabinet is unavailable, the on-site temporary maintenance power supply can be used as the power supply of the electric valve to debug and diagnose the electric valve.

[0104] The controllable three-phase power switch electrically connects or disconnects the external power supply to or from the phase sequence adjustment module according to the slave switch instruction.

[0105] Furthermore, the controllable three-phase power switch is closed by means of a switch instruction, and the three-phase power is sent to the phase sequence adjustment module.

[0106] The phase sequence adjustment module adjusts the phase sequence of the three-phase power transmitted by the controllable three-phase power switch according to the phase sequence requirements in the switch command. The phase sequence adjustment module outputs the three-phase power of the corresponding phase sequence to the power output terminal, drives the electric valve motor to rotate forward or reverse, and realizes the switch control function of the electric valve.

[0107] It can be understood that correctly adjusting the phase sequence can prevent the electric valve from operating in the wrong direction or at an inappropriate time, thereby avoiding equipment damage or failure caused by incorrect phase sequence, reducing the risk of accidents, and ensuring the safety of personnel and equipment.

[0108] Phase sequence adjustment enables the electric valve to be compatible with different power supply systems, especially in situations where the power supply phase sequence may change, thereby enhancing the adaptability and flexibility of the present invention.

[0109] In some executable embodiments, the control drive unit further includes: a three-phase current output port and a current transformer.

[0110] Furthermore, the current transformer is used to measure the three-phase power supply current flowing through the control or drive device.

[0111] The interface unit includes: a three-phase current input port.

[0112] The three-phase current input port is connected to the three-phase current output port.

[0113] The current transformer collects the current signal between the power input terminal and the controllable three-phase power switch.

[0114] By collecting current signals, the present invention can monitor the current size at the power input end to ensure that it does not exceed the safe operating range of the device. This is crucial for overcurrent protection and can prevent the device from being damaged due to excessive current.

[0115] The current transformer transmits the current signal to the three-phase current output port through the three-phase current input port.

[0116] The three-phase current output port transmits the current signal to the data acquisition control unit.

[0117] When the data acquisition control unit detects that the value of any phase of the three-phase current is greater than the set overcurrent protection constant, the overcurrent protection is triggered, and the data acquisition control unit sends a reset instruction and a locking instruction to the control instruction sending port.

[0118] Specifically, the data acquisition control unit can monitor the current size at the power input terminal by acquiring the collected current signal to ensure that the current does not exceed the safe working range of the electric valve, thereby preventing the electric valve from being damaged due to excessive current.

[0119] The first control instruction receiving port sends the reset instruction and the locking instruction to the electric valve to control the reset and locking of the electric valve.

[0120] The data acquisition control unit sends an over-current alarm instruction to the alarm unit to send out an audible and visual alarm signal.

[0121] In some executable embodiments, the control drive unit further includes: a three-phase input and output voltage detection module and a three-phase voltage output port.

[0122] Specifically, monitoring the three-phase voltage can detect abnormal conditions such as overvoltage, undervoltage, phase loss, and voltage imbalance, thereby protecting the equipment from damage and ensuring the stable operation of the system. In a three-phase system, the correct phase sequence is crucial to the running direction of the electric valve. Collecting voltage signals can help the present invention confirm whether the phase sequence is correct to avoid equipment reversal or failure.

[0123] The interface unit also includes: a three-phase voltage input port.

[0124] The three-phase voltage output port is connected to the three-phase voltage input port.

[0125] The three-phase input and output voltage detection module obtains the voltage data of the power input and power output ends and transmits it to the data acquisition control unit through the three-phase voltage input port. When the data acquisition control unit detects that the phase sequence of the three-phase voltage is reversed, the data acquisition control unit sends a reverse sequence alarm instruction to the alarm unit. The alarm unit sends a reverse sequence optical alarm signal.

[0126] It should be noted that the phase sequence needs to be adjusted manually. If the valve is locked due to the reverse sequence signal, it is impossible to determine the cause of the valve failure (because the above overcurrent and other conditions will still cause locking). Secondly, when the electric head is running in reverse phase sequence, it will not damage the equipment. Therefore, when the data acquisition control unit detects that the three-phase voltage phase sequence is reversed, only a light alarm is issued. By using sound and light alarms and light alarms to distinguish between equipment production damage events, the alertness of the staff is improved. Avoid the staff's vigilance being reduced due to the use of the same alarm signal.

[0127] In some executable embodiments, such as Figure 2 As shown in the figure, the plug is the plug of the electric valve, and the 380V power supply is an external power supply with a voltage of 380V. The control drive unit and the local control device exchange data between three-phase voltage, three-phase current and test control instructions. The local control device obtains the valve state data of the electric valve from the plug of the electric valve.

[0128] Alternatively, if Figure 3 As shown, the control drive unit includes a first control instruction receiving port, a power input port, a power output port, a phase sequence adjustment module, a controllable three-phase power switch, a three-phase current output port, a current transformer, a three-phase input and output voltage detection module and a three-phase voltage output port. The three-phase input and output voltage detection module includes output voltage monitoring and three-phase input voltage monitoring.

[0129] The first control instruction receiving port is connected to the phase sequence adjustment module and the controllable three-phase power switch. The first control instruction receiving port transmits the phase sequence adjustment instruction to the phase sequence adjustment module, and the first control instruction receiving port transmits the switch instruction to the controllable three-phase power switch. The current transformer collects the current signal between the power input terminal and the controllable three-phase power switch and transmits it to the three-phase current output port. The phase sequence adjustment module and the controllable three-phase power switch, the controllable three-phase power switch is used to control whether the current received by the power input terminal is transmitted to the phase sequence adjustment module. The phase sequence adjustment module is also connected to the power output terminal to control the phase of the electrical signal output by the power output terminal to prevent damage to the electric valve. The output voltage monitoring is used to collect the voltage signal between the output of the power output terminal and the phase sequence adjustment module, and transmit it to the three-phase voltage output port. The three-phase input voltage monitoring is used to collect the voltage signal between the power input terminal and the controllable three-phase power switch, and transmit it to the three-phase voltage output port.

[0130] In some executable embodiments, the invention further includes: a connector for controlling the switch of the electric valve.

[0131] The connector includes a valve external socket, an electric valve access plug, a first valve state output interface and a second control instruction receiving port.

[0132] The local control device also includes: a valve state input interface. The valve state input interface is connected with the valve second door state output interface and the data acquisition control unit.

[0133] The valve status input interface transmits the received valve information to the data acquisition control unit.

[0134] The second control instruction receiving port is connected to the control instruction sending port.

[0135] The valve external socket is connected to the power input terminal.

[0136] The electric valve access plug is connected to the power output terminal.

[0137] The electric valve access plug also transmits valve information to the valve status output interface through the signal cable and is connected to the valve status output interface.

[0138] The switch command issued by the data acquisition control unit is sent to the electric valve through the second control command receiving port.

[0139] Alternatively, if Figure 4 As shown, when used on site, unplug the formal plug on the electric valve, insert the valve external socket, insert the electric valve access plug of the connector into the electric valve socket, and then connect the "valve state" port (first valve state output interface) and "control instruction" port (second control instruction receiving port) on the connector socket with the "valve state" port (valve state input interface) and "control instruction" port (control instruction sending port) of the local control device. The valve external socket is connected to the electric valve access plug through a power cable and a signal cable. The power cable transmits power to the electric valve, and the signal cable transmits the valve state information of the electric valve to the connector, and then the connector transmits it to the local control device.

[0140] In some executable embodiments, it further comprises: a laser displacement sensor for monitoring the displacement of the valve stem of the electric valve. The interface unit further comprises: a displacement port.

[0141] The displacement port is connected with a displacement laser displacement sensor and a data acquisition control unit.

[0142] Optionally, the displacement port is connected to the data acquisition control unit via a displacement channel.

[0143] When the data acquisition control unit monitors that the engineering quantity change trend of the displacement laser displacement sensor does not conform to the switch instruction issued by the data acquisition control unit, the reverse protection is triggered, and the data acquisition control unit sends a reset instruction and a locking instruction to the control instruction sending port. The data acquisition control unit sends a reverse alarm instruction to the alarm unit to emit an audible and visual alarm signal.

[0144] Specifically, the laser displacement sensor is used to monitor the displacement of the valve stem. The valve stem displacement is converted into a corresponding electrical signal after the laser displacement sensor, output to the displacement port, and measured, collected and converted (converted into engineering quantity) through the displacement channel.

[0145] Through the consistency of the valve stem displacement change trend and the switch command, it is judged whether the valve is reversed, and reverse protection is added. After the reverse protection is triggered, the power supply is automatically switched, the switch command issued by the reset lock is reset, the valve is placed in a safe state, and the corresponding sound and light alarm is issued, which improves the safety of on-site work and eliminates the risk of damaging the electric valve due to failure to cut off the power supply in time when the valve reverses during debugging and diagnosis.

[0146] In some executable embodiments, the local control device further includes: a power supply module for providing power to the local control device.

[0147] The power module includes a rechargeable battery and a charging interface.

[0148] The rechargeable battery is connected with the data acquisition control unit and the charging interface.

[0149] Built-in rechargeable battery, no additional power supply is required when in use, reducing on-site workload, avoiding the risks of providing power supply and during use, while reducing the weight of the device and the intensity of on-site handling work for staff.

[0150] In some executable embodiments, the local control device further includes: a control button.

[0151] The control button is connected to the data acquisition control unit, and various test control instructions are sent to the data acquisition control unit. After logical processing and analysis by the data acquisition control unit, the corresponding switch instructions are output through the output channel to the control instruction sending port, and then transmitted to the electric valve.

[0152] In some executable embodiments, the local control device further includes: a communication port and a display unit.

[0153] The communication port is connected to the data acquisition control unit, and receives various test control instructions from the outside to the data acquisition control unit. After logical processing and analysis by the data acquisition control unit, the corresponding switch instructions are output through the output channel to the control instruction sending port, and then transmitted to the electric valve.

[0154] The display unit sends various test control instructions to the communication port, which are then sent to the data acquisition control unit by the communication port.

[0155] Optionally, the display unit is connected to the local control device via a data line. When the electric valve is debugged and diagnosed, the three-phase voltage, three-phase current, displacement, valve status, and various operating instructions issued from the local control device uploaded by the local control device are received via the data line, and the received data is displayed in the form of a trend chart and indicator lights. At the same time, when the local control device is switched to "remote" operation, point operation open, point operation close, stroke open, stroke close, torque open, and torque close control instructions can be sent to the local control device through the operation panel on the display operation unit.

[0156] In one embodiment, Figure 5 As shown, the local control device includes an interface unit, a data acquisition control unit, a power module, an alarm unit, a communication port and a control button.

[0157] The interface unit includes: a displacement port, a three-phase current input port, a control instruction sending port, a three-phase voltage input port and a valve state input port. The displacement port is connected to the data acquisition control unit through a displacement channel. The three-phase current input port is connected to the data acquisition control unit through a current channel. The control instruction sending port is connected to the data acquisition control unit through an output channel. The three-phase voltage input port is connected to the data acquisition control unit through a voltage channel. The valve state input port is connected to the data acquisition control unit. The data acquisition control unit can be a single-chip microcomputer.

[0158] The power module includes a rechargeable battery and a charging port. The rechargeable battery can be 12V. The rechargeable battery is connected to the data acquisition control unit and the charging port. The charging port is also connected to a 220V external power supply through an adapter.

[0159] The communication port is connected with the data acquisition control unit and the display unit.

[0160] The control buttons and data acquisition control unit are used to trigger corresponding instructions. The control buttons include point operation on, point operation off, travel on, travel off, torque on, torque off, R / L switching, phase sequence adjustment, and emergency stop. Different control buttons can trigger the data acquisition control unit to issue different instructions.

[0161] The alarm module includes light alarm, sound alarm and phase sequence indication. The light alarm and phase sequence indication can be LED light prompt alarm, and the sound alarm is the sound emitted by speakers, horns, etc.

[0162] The optical alarm, the sound alarm and the phase sequence indication are connected with the data acquisition control unit.

[0163] In some scenarios, the display unit may also be a smart device connected to the local control device wirelessly.

[0164] When the local control device detects that there are local and remote control commands at the same time, the abnormal protection is triggered, the switch command issued is reset and locked, and an audible and visual alarm signal is issued. Specifically, the data acquisition control unit can perform the monitoring.

[0165] The local control device of the present invention has light weight, small size, few accessories (displacement sensor and special connection cable), and is convenient for on-site transportation and carrying.

[0166] The present invention also provides a method for testing the functional status of an electric valve, comprising:

[0167] The electric valve function status is tested using any of the above electric valve function status testing instruments to obtain the test result of the electric valve.

[0168] The above embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, the above technical features can be freely combined without departing from the concept of the present invention, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the coverage of the claims of the present invention.

Claims

1. The test instrument for the functional status of electric valves is characterized by: include: A local control device for receiving and issuing commands; The local control device includes a data acquisition control unit and an interface unit; The data acquisition control unit is connected to the interface unit; The data acquisition control unit issues a test control instruction through the interface unit, and the test control instruction is used to adjust the input power supply of the electric valve; The data acquisition control unit acquires the state data and input current data of the electric valve through the interface unit, and performs early warning monitoring on the state data and the input current data.

2. The electric valve function status tester according to claim 1, characterized in that: Also includes: A control drive unit for driving the electric valve; The control driving unit comprises: a first control instruction receiving port; The interface unit comprises: a control instruction sending port connected to the first control instruction receiving port; The test control instructions include switch instructions; The data acquisition control unit sends the switch instruction to the control drive unit through the control instruction sending port; the control drive unit receives the switch instruction output by the local control device and provides corresponding input power to the electric valve.

3. The electric valve function status tester according to claim 2, characterized in that: The local control device further includes: an alarm unit; the interface unit further includes a valve status input interface; The valve state input interface is connected to the electric valve and the data acquisition control unit; The valve status input interface transmits the received valve information to the data acquisition control unit; when the data acquisition control unit detects that the valve status signal is abnormal, the abnormal protection is triggered, and the data acquisition control unit sends a reset instruction and a locking instruction to the control instruction sending port; The valve state input interface sends the reset instruction and the locking instruction to the electric valve to control the reset and locking of the electric valve; The data acquisition control unit sends an abnormal alarm instruction to the alarm unit to send out an audible and visual alarm signal.

4. The electric valve function status tester according to claim 3, characterized in that: The control drive unit comprises: a power input terminal, a power output terminal, a phase sequence adjustment module, and a controllable three-phase power switch; The phase sequence adjustment module and the controllable three-phase power switch are connected to the first control instruction receiving port; The power input end and the power output end are electrically connected via the phase sequence adjustment module and the controllable three-phase power switch; The power input terminal is connected to an external power supply; The controllable three-phase power switch electrically connects or disconnects the external power supply and the phase sequence adjustment module according to the switch instruction; The phase sequence adjustment module adjusts the phase sequence of the three-phase power transmitted by the controllable three-phase power switch according to the phase sequence requirement in the switch instruction; the phase sequence adjustment module outputs the three-phase power of the corresponding phase sequence to the power output end, drives the electric valve motor to rotate forward or reverse, and realizes the switch control function of the electric valve.

5. The electric valve function status tester according to claim 4, characterized in that: The control drive unit further includes: a three-phase current output port and a current transformer; The interface unit comprises: a three-phase current input port; The three-phase current input port is connected to the three-phase current output port; The current transformer collects the current signal between the power input terminal and the controllable three-phase power switch; The current transformer transmits the current signal to the three-phase current output port through the three-phase current input port; The three-phase current output port transmits the current signal to the data acquisition control unit; When the data acquisition control unit detects that the value of any phase of the three-phase current is greater than the set overcurrent protection constant, the overcurrent protection is triggered, and the data acquisition control unit sends a reset instruction and a locking instruction to the control instruction sending port; The first control instruction receiving port sends the reset instruction and the locking instruction to the electric valve to control the reset and locking of the electric valve; The data acquisition control unit sends an overcurrent alarm instruction to the alarm unit to send out an audible and visual alarm signal.

6. The electric valve function status tester according to claim 4, characterized in that: The control drive unit further includes: a three-phase input and output voltage detection module and a three-phase voltage output port; The interface unit further includes: a three-phase voltage input port; The three-phase voltage output port is connected to the three-phase voltage input port; The three-phase input and output voltage detection module obtains the voltage data of the power input end and the power output end and transmits it to the data acquisition control unit through the three-phase voltage input port; when the data acquisition control unit detects that the phase sequence of the three-phase voltage is reversed, the data acquisition control unit sends the reverse sequence alarm instruction to the alarm unit; the alarm unit sends a reverse sequence optical alarm signal.

7. The electric valve function status tester according to claim 2, characterized in that: Also includes: A connector for controlling the switch of the electric valve; The connector includes a valve external socket, an electric valve access plug, a first valve state output interface and a second control instruction receiving port; The local control device further comprises: a valve state input interface; the valve state input interface is connected to the first valve state output interface and the data acquisition control unit; The valve status input interface transmits the received valve information to the data acquisition control unit; The second control instruction receiving port is connected to the control instruction sending port; The valve external socket is connected to the power input terminal; The electric valve access plug is connected to the power output terminal; The electric valve access plug also transmits the valve information to the first valve state output interface through a signal cable and is connected to the valve state output interface; The switch instruction sent by the data acquisition control unit is sent to the electric valve through the second control instruction receiving port.

8. The electric valve function status tester according to claim 3, characterized in that: It also includes: a laser displacement sensor for monitoring the displacement of the valve stem of the electric valve; The interface unit further includes: a displacement port; The displacement port is connected to the displacement laser displacement sensor and the data acquisition control unit; When the data acquisition control unit monitors that the engineering quantity change trend of the displacement laser displacement sensor does not conform to the switch instruction issued by the data acquisition control unit, the reverse protection is triggered, and the data acquisition control unit sends a reset instruction and a locking instruction to the control instruction sending port, and the data acquisition control unit sends a reverse alarm instruction to the alarm unit to emit an audible and visual alarm signal.

9. The electric valve function status tester according to claim 8, characterized in that: The local control device further comprises: a power supply module for providing power to the local control device; The power module includes a rechargeable battery and a charging interface; The rechargeable battery is connected to the data acquisition control unit and the charging interface.

10. The electric valve function status testing method is characterized by: include: The electric valve functional status is tested using the electric valve functional status testing instrument as described in any one of claims 1 to 9 to obtain the test result of the electric valve.

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