CN207921463U

CN207921463U - A kind of electrically operated valve failure detector

Info

Publication number: CN207921463U
Application number: CN201820312186.8U
Authority: CN
Inventors: 刘川; 刘晓川
Original assignee: Dongchuan Wuhan Tap Water Science And Technology Development Co Ltd
Current assignee: Dongchuan Wuhan Tap Water Science And Technology Development Co Ltd
Priority date: 2018-03-07
Filing date: 2018-03-07
Publication date: 2018-09-28
Anticipated expiration: 2028-03-07

Abstract

The utility model discloses a kind of electrically operated valve failure detectors, including valve switch circuit and controller, the valve switch circuit includes the first limit switch SQ1 of executing agency's valve opening move distance for controlling electrically operated valve and closes the second limit switch SQ2 of valve move distance for controlling the executing agency of electrically operated valve, and the controller includes the first timer for obtaining electric time progress timing for the first static contact to the first limit switch SQ1 and the second timer for obtaining electric time progress timing for the first static contact to the second limit switch SQ2.The utility model be arranged the first timer and the second timer record respectively the first limit switch and the second limit switch the first static contact the electric time, and itself and the controlled valve time under normal condition are compared, and then judge electrically operated valve whether normal switch.

Description

A kind of electrically operated valve failure detector

Technical field

The utility model is related to fault detection techniques, more particularly, to a kind of electrically operated valve failure detector.

Background technology

Electrically operated valve can generate failure because of a variety of causes in use, and the final result of failure can make valve not It is controlled, can not be opened or tight shut-off.Currently, mostly by loading onto installation limit switch in motor-driven valve, and opened according to limit The feedback of pass judges whether the switch of electrically operated valve is normal, or is judged by driving the quality of the electrothermal relay of valve switch Whether it breaks down.However, in practical applications, although limit switch can judge whether electrically operated valve switchs, it is simultaneously Whether the switch for being unable to accurate judgement electrically operated valve is normal, such as when electrically operated valve is blocked or its own parts damages by foreign object And when frictional force being caused to increase, electrically operated valve can still switch, but its switching speed is slack-off, easily lead to electrically operated valve Control accuracy reduces, and can not reflect the slack-off problem of electrically operated valve switching speed only by limit switch.

Utility model content

The purpose of the utility model is to overcome above-mentioned technical deficiencies, propose a kind of electrically operated valve failure detector, solution Can not certainly judge to reflect in the prior art electrically operated valve switch whether normal technical problem.

To reach above-mentioned technical purpose, the technical solution of the utility model provides a kind of electrically operated valve failure detector, Including valve switch circuit and controller, the valve switch circuit includes executing agency's valve opening fortune for obtaining electrically operated valve First limit switch SQ1 of dynamic distance and the second limit that valve move distance is closed for obtaining the executing agency of electrically operated valve are opened SQ2 is closed, the controller includes obtain electric time progress timing first for the first static contact to the first limit switch SQ1 Timer and for the first static contact to the second limit switch SQ2 electric time carries out the second timer of timing.

Compared with prior art, the first timer is arranged in the utility model and the second timer records the first limit and opens respectively Close and the first static contact of the second limit switch the electric time, and it is carried out with the controlled valve time under normal condition pair Than, so judge electrically operated valve whether normal switch.

Description of the drawings

Fig. 1 is the connection block diagram of the electrically operated valve failure detector of the utility model；

Fig. 2 is the circuit theory schematic diagram of the valve switch circuit of the utility model；

Fig. 3 is the motor connection diagram of the electrically operated valve of the utility model.

Specific implementation mode

In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain The utility model is not used to limit the utility model.

As shown in Figure 1, the utility model provides a kind of electrically operated valve failure detector, including valve switch circuit 11 And controller 12, valve switch circuit 11 are mainly used for controlling the switch of electrically operated valve.

As shown in Figure 2 and Figure 3, the present embodiment includes that valve switch circuit 11 includes fuse FU1, fuse FU2, opens Button SB1, close button SB2, positive contactor, reversion contactor, the first limit switch SQ1, the second limit switch SQ2, the Three limit switch SQ3, the 4th limit switch SQ4, the first indicator light L1, the second indicator light L2, third indicator light L3, it is specific to connect When, one end SB1 of releasing the button is connect by fuse FU1 with firewire L11, the contactor of the other end and reversion contactor is normally closed tactile Head KMR3 connections, and the other end of the contactor normally closed interlock KMR3 of contactor is inverted then by the contactor line of positive contactor Circle KMF0 is connect with the first static contact of third limit switch SQ3, and the moving contact of third limit switch SQ3 is then opened with the first limit The first static contact connection of SQ1 is closed, the moving contact of the first limit switch SQ1 is connect with zero curve, and the second of the first limit switch SQ1 Static contact is connect with the first indicator light L1；The one end close button SB2 connect by fuse FU1 with firewire L11, the other end with just The contactor normally closed interlock KMF3 connections of contactor, and the other end of the contactor normally closed interlock KMF3 of positive contactor then leads to The contactor coil KMR0 for crossing reversion contactor is connect with the first static contact of the 4th limit switch SQ4, the 4th limit switch SQ4 Moving contact then connect with the first static contact of the second limit switch SQ2, the moving contact of the second limit switch SQ2 connects with zero curve It connects；The second static contact of first limit switch SQ1 is connect with the first indicator light L1, the first indicator light L1 by fuse FU2 with Firewire connects, and the second static contact of the second limit switch SQ2 is connect with the second indicator light L2, and the second indicator light L2 passes through fuse FU2 is connect with firewire, and the second static contact of third limit switch SQ3 and the 4th limit switch SQ4 connect with third indicator light L3 It connects, third indicator light L3 is connect by fuse FU2 with firewire；First normally open contact KMR1 of the reversion contactor and rotating forward First normally open contact KMF1 of contactor may be contained between the motor M of electrically operated valve and alternating current, can control motor M's respectively It rotates forward and rotates backward, and the first limit switch SQ1, the second limit switch SQ2, third limit switch SQ3, the 4th limit The moving contact of bit switch SQ4 is connect with the executing agency of electrically operated valve so that the first limit switch SQ1 and third limit switch Move distance when executing agency's valve opening door of SQ3 control electrically operated valves, and the second limit switch SQ2 and the 4th limit switch SQ4 then controls move distance when executing agency's closing valve of electrically operated valve；Meanwhile the second of the positive contactor is normally opened tactile Head KMF2 is in parallel with the first limit switch SQ1, the second normally open contact KMR2 and the second limit switch SQ2 of the reversion contactor It is in parallel.

When the valve switch circuit 11 of the present embodiment specifically acts on, when opening electrically operated valve, pressable is released the button SB1, then the contactor coil KMF0 of positive contactor obtain electric, the first normally open contact KMF1 of positive contactor and second it is normally opened touch Head KMF2 is closed, may make the first limit switch SQ1 and third limit switch SQ3 persistently electric, and electrically operated valve simultaneously Motor M obtain electric, can rotate forward to drive the executing agency of electrically operated valve to act, while the contactor of positive contactor is normal It closes contact KMF3 then to disconnect, can avoid valve opening circuit and valve closing circuit simultaneously turns on, and when executing agency drives the first limit When bit switch SQ1 moving contacts move to defined position, the first static contact of the first limit switch SQ1 is separated with moving contact, And be connected between its second static contact and moving contact, then the contactor coil KMF0 dead electricity of positive contactor, and the first indicator light L1 obtains electric to form the open instruction of electrically operated valve, while the first normally open contact KMF1 disconnections of positive contactor, electrically operated valve Motor M dead electricity, stopping action of its executing agency, the contactor normally closed interlock KMF3 of positive contactor is closed；It is electronic when closing When valve, pressable close button SB2, then invert contactor contactor coil KMR0 obtain it is electric, invert contactor first often Open contact KMR1 and the second normally open contact KMR2 are closed, and the second limit switch SQ2, the 4th limit switch SQ4 may make to hold It is continuous to obtain, and the motor M of electrically operated valve is obtained, and can be rotated backward to drive the executing agency of electrically operated valve act, and ought the When the moving contact of two limit switch SQ2 moves to defined position, the first static contact and moving contact of the second limit switch SQ2 is disconnected It opens, the second static contact is then connected to moving contact, therefore inverts the contactor coil KMR0 dead electricity of contactor, the motor of electrically operated valve M dead electricity, its executing agency's stopping action, while the second indicator light L2 obtain electric to form the closing instruction of electrically operated valve；Third limits Bit switch SQ3 and the 4th limit switch SQ4 can then be controlled in the first limit switch SQ1 and the second limit switch SQ damages respectively Power-off persistently rotates motor M and executing agency is caused to be damaged which obviate the motor M of electrically operated valve, third indicator light L3 Third limit switch SQ3 and the 4th limit switch SQ4 controls when then can be to the first limit switch SQ1 and the second limit switch SQ damages System power-off is indicated.

Wherein, the first indicator light of the present embodiment L1, the second indicator light L2, third indicator light L3 difference red light, green light and Huang Lamp.

As shown in Figure 1, although above-mentioned valve switch circuit 11 can indicate the switch of electrically operated valve, it can not reflect The switching speed of electrically operated valve, therefore controller 12 described in the present embodiment includes for the first stationary contact to the first limit switch SQ1 Head electric time carry out timing the first timer 12a and for the first static contact to the second limit switch SQ2 it is electric Time carries out the second timer 12b of timing, for judging whether the first timing signal of the first timer 12a is more than the First comparison module 12c of one threshold value, the first report for sending out alarm signal when the first timing signal is more than first threshold Warn device 12d, for judging whether the second timing signal of the second timer 12b is more than the second comparison module of second threshold 12e, the second alarm 12f for sending out alarm signal when the second timing signal is more than second threshold, can pass through first The electric time that obtains that timer 12a calculates the first static contact of the first limit switch SQ1 is opened in real time with the valve for obtaining electrically operated valve It opens the time, and the valve real-time opening time is opened into valve times with minimum setting and is compared, if less than minimum setting valve opening door Time then illustrates that valve opening is normal, and valve times are opened if more than maximum setting, then controls the first alarm 12d alarms, so as to It is overhauled in operating personnel；Calculate the first static contact of the second limit switch SQ2 by the second timer 12b simultaneously obtains the electric time The valve real-time shut-in time to obtain electrically operated valve, and valve real-time shut-in time and minimum setting closing valve time are carried out Compare, if less than the minimum setting closing valve time, illustrates that valve is closed normally, set the closing valve time if more than maximum, then The second alarm 12f alarms are controlled, in order to which operating personnel overhaul.

The microcontroller with clocking capability, PLC controller 12 can be used in the controller 12 of the present embodiment, obtains to obtain electric signal And timing is carried out, then timing signal is compared as this field routine techniques with given threshold, therefore is not described in detail；This Circuit control can also be used in the controller 12 of embodiment, when using circuit control, the first timer 12a and the second timer 12b can be used conventional electromagnetic shooting point timer, and the first comparison module 12c and the second comparison module 12e are conventional comparison Voice guard or light crossing-signal can be used in circuit, the first alarm 12d and the second alarm 12f, and setting first is needed to drive Dynamic model block 12g and the second drive module 12h is to respectively drive the first alarm 12d and the second alarm 12f alarms, and first drives Dynamic model block 12g and the second drive module 12h are all made of conventional driving circuit.

Specific embodiment of the present utility model described above does not constitute the restriction to scope of protection of the utility model. The various other corresponding changes and deformation that any technical concept according to the present utility model is made, should be included in this practicality In novel scope of the claims.

Claims

1. a kind of electrically operated valve failure detector, which is characterized in that including valve switch circuit and controller, the valve is opened Powered-down road includes the first limit switch SQ1 of executing agency's valve opening move distance for controlling electrically operated valve and for controlling The second limit switch SQ2 of valve move distance is closed in the executing agency of electrically operated valve, and the controller includes for being limited to first The first static contact of switch SQ1 electric time carries out the first timer of timing and for the to the second limit switch SQ2 The second timer for obtaining electric time progress timing of one static contact.

2. electrically operated valve failure detector according to claim 1, which is characterized in that the controller further includes being used for Judge whether the first timing signal of first timer is more than the first comparison module of first threshold, for when the first timing Signal sends out the first alarm of alarm signal, for judging that the second timing of second timer is believed when being more than first threshold Number whether be more than second threshold the second comparison module, for when the second timing signal be more than second threshold when send out alarm signal The second alarm.

3. electrically operated valve failure detector according to claim 2, which is characterized in that the valve switch circuit also wraps The SB1 that releases the button, close button SB2, positive contactor, reversion contactor are included, the SB1 that releases the button, inverts contactor Contactor normally closed interlock KMR3, the contactor coil KMF0 of positive contactor, the first limit switch SQ1 the first terminals successively It is series between firewire and zero curve, the close button SB2, the contactor normally closed interlock KMF3 of positive contactor, reversion contact The contactor coil KMR0 of device, the second limit switch SQ2 the first terminals be sequentially connected in series between firewire and zero curve；It is described anti- First normally open contact KMR1 of contactor and the first normally open contact KMF1 of positive contactor may be contained within the electricity of electrically operated valve Between machine and alternating current.

4. electrically operated valve failure detector according to claim 3, which is characterized in that the second of the positive contactor Normally open contact KMF2 is in parallel with the first limit switch SQ1, the limits of the second normally open contact KMR2 and second of the reversion contactor Switch SQ2 is in parallel.

5. electrically operated valve failure detector according to claim 4, which is characterized in that the valve switch circuit also wraps Include the third limit between the contactor coil KMF0 for being series at positive contactor and the first terminals of the first limit switch SQ1 Switch SQ3, and be series between the contactor coil KMR0 and the first terminals of the second limit switch SQ2 of reversion contactor The 4th limit switch SQ4.

6. electrically operated valve failure detector according to claim 5, which is characterized in that the valve switch circuit also wraps Include the first indicator light L1 being connect with the second static contact of the first limit switch SQ1, second with the second limit switch SQ2 Second indicator light L2 of static contact connection, it connect with the second static contact of third limit switch SQ3 and the 4th limit switch SQ4 Third indicator light L3.