CN2766125Y

CN2766125Y - Check butterfly valve

Info

Publication number: CN2766125Y
Application number: CN 200520039303
Authority: CN
Inventors: 宋激扬; 徐珍
Original assignee: SHANGHAI BIAOYI VALVE CO Ltd
Current assignee: SHANGHAI BIAOYI VALVE CO Ltd
Priority date: 2005-01-27
Filing date: 2005-01-27
Publication date: 2006-03-22
Anticipated expiration: 2015-01-27

Abstract

The utility model discloses a butterfly check valve. The utility model is characterized in that an electrical apparatus comprises a control circuit which comprises a programmable controller PLC, a remote control circuit, a valve position control circuit and a peripheral circuit which are connected the input end of the control circuit which comprises the programmable controller PLC, and a remote control circuit, a valve position control circuit and a peripheral circuit comprising a frequency conversion speed regulator which are connected with the output end of the control circuit comprising the programmable controller PLC. The utility model adopts the combination of the programmable controller PLC and a frequency converter. A control program can be compiled by using various universal programming programs, and can be modified and adjusted repeatedly to furthest satisfy the operational requirements for users. Besides, the control program has the memory function when electricity is lost. The utility model fills the national blank technically, and can be used as a substitute for the same product at home and abroad.

Description

A kind of non-return butterfly valve

Technical field:

The utility model relates to a kind of valve, and the non-return butterfly valve of the specifically a kind of exit of pump of the circulation that is used for thermal power plant and the water turbine ingress of hydroelectric power plant especially relates to the connecting structure for electrical equipment in this non-return butterfly valve.

Background technique:

In the exit of pump of the circulation of thermal power plant and the water turbine ingress of hydroelectric power plant, all need be equipped with and prevent that water hammer from producing and preventing the valve that medium flows backwards.The valve that initial period uses is a gate valve and safety check, is progressively replaced by the various non-return butterfly valves that surge then.Hydraulic butterfly check valve is still the leading products in this field at present, but because the required installing space of non-return butterfly valve that surges is bigger, and have the problem of hydraulic oil pollution.In recent years, the technician is many from electrical control aspect consideration solution.By retrieval " Chinese patent Information Network ", find two kinds of correlation techniques altogether: one is that the patent No. is 2353990 electronic speed-regulating butterfly valve, adopts double-speed motor to reach the valve speed and closes speed and the requirement of time; Also having one is that the patent No. is 217746 regulable speed type electric butterfly valve, reaches the job requirement of valve by the programmable device and the frequency variator that continuously changes the operating motor power supply frequency of preliminary election programming usefulness.But the price of double-speed motor is still relatively more expensive at present, and parameter is set the back and is difficult for revising, though and change the requirement of electric machine frequency arrival valve working is present more advanced method, but the function ratio of programmable device is more single, and exist parameter to set the defective that the back is difficult for modification, can not satisfy the technical requirements of user Geng Gao.

Summary of the invention:

The purpose of this utility model provides a kind of non-return butterfly valve that can test repeatedly, adjust valve closing speed.

To achieve these goals, the technical solution of the utility model is: a kind of non-return butterfly valve, it comprises the butterfly valve body, the transmission device that is connected the control valve switch with the butterfly valve body, the Electric actuator that cooperates with transmission device, the electric device of control Electric actuator, it is characterized in that: electric device comprises the control circuit that contains programmable controller PLC, the circuit for remotely controlling that is connected with the control circuit input end that contains programmable controller PLC, valve position control circuit and contain the peripheral circuit of variable-frequency governor, be connected with the control circuit output terminal of programmable controller PLC circuit for remotely controlling, valve position control circuit and peripheral circuit.

Wherein the valve position control circuit is: the remote control switch middle end is connected with power supply one end, remote port is connected with long-range pass valve normal open switch one end with long-range valve normal open switch one end of opening respectively, long-range open the valve normal open switch the other end connect successively again open valve put in place the relay normally closed switch, opened moment relay normally closed switch, closed the valve relay normally closed switch and opened the coil of valve relay, finally be connected to the power supply the other end; The long-range pass valve normal open switch the other end connect to close the valve relay normally closed switch that puts in place again successively, closed moment relay normally closed switch, open the coil of valve relay normally closed switch and pass valve relay, finally be connected to the power supply the other end, remote control switch is held on the spot respectively and is opened valve normal open switch one end on the spot and close valve normal open switch one end on the spot and be connected, opening the valve normal open switch the other end on the spot is connected with the above-mentioned long-range valve Chang Kaikai valve the other end of opening, closing the valve Chang Kaikai valve the other end on the spot is connected with the above-mentioned long-range pass valve normal open switch the other end, open the valve relay normal open switch and to open the valve normal open switch on the spot in parallel, close the valve relay normal open switch and to close valve Chang Kaikai valve on the spot in parallel.

Wherein circuit for remotely controlling is: be installed in the butterfly valve body open valve put in place often open near switch with open put in place the coil of relay of valve and be connected in series in both ends of power; The moment of opening that is installed in the butterfly valve body is often opened near switch and the coil of driving the moment relay and is connected in series in both ends of power; Be installed in pass valve in the butterfly valve body put in place often open near switch with open put in place the coil of relay of valve and be connected in series in both ends of power; Be installed in pass in the butterfly valve body moment often open near switch and the coil that closed the moment relay and be connected in series in both ends of power.

Adopt programmable controller PLC to combine with frequency variator, control program can use multiple universal programming programming, and can test repeatedly, adjust, can satisfy user's operation requirement to greatest extent, has the dead electricity memory function simultaneously, when sending a telegram here once more after the electric network source dead electricity in the valve running, the pairing curve continuation in the working position of valve is carried out and is put in place in the time of still can dead electricity being installed.

Description of drawings:

Fig. 1 is a schematic representation of the present utility model

Fig. 2 is an electrical schematic diagram of the present utility model

Embodiment:

Below in conjunction with drawings and Examples the utility model is further described.

The utility model comprises butterfly valve body 1, is connected the transmission device 2 of control valve switch with butterfly valve body 1, the Electric actuator 3 that cooperates with transmission device, the electric device 4 of control Electric actuator.Wherein Electric actuator 3 is an electric motor.Wherein electric device comprises the control circuit 5 that contains programmable controller PLC and frequency speed regulator, the circuit for remotely controlling 6 that is connected with control circuit 5 input ends that contain programmable controller PLC, valve position control circuit 7 and the peripheral circuit 8 of speed regulator frequently, be connected with control circuit 5 output terminals of programmable controller PLC circuit for remotely controlling 6, valve position control circuit 7 and contain the peripheral circuit 8 of variable-frequency governor.Wherein the valve position control circuit is: be installed in the butterfly valve body 1 open valve put in place often open near switch S Q3-4 with open put in place the coil of relay J KW of valve and be connected in series in both ends of power; The moment of opening that is installed in the butterfly valve body 1 is often opened near switch S Q1 and is connected in series in both ends of power with the coil of opening moment relay J KG; Be installed in pass valve in the butterfly valve body 1 put in place often open near switch S Q5-6 with open put in place the coil of relay J GW of valve and be connected in series in both ends of power; Be installed in pass in the butterfly valve body 1 moment often open near switch S Q2 and be connected in series in both ends of power with the coil that closed moment relay J GG.Wherein circuit for remotely controlling is: remote control switch SAl middle end is connected with power supply one end, remote port is connected with long-range pass valve normal open switch DL2 one end with long-range valve normal open switch DL1 one end of opening respectively, long-range open the valve normal open switch DL1 the other end connect successively again open valve put in place relay J KW normally closed switch, opened moment relay J KG normally closed switch, closed valve relay JG normally closed switch and opened the coil of valve relay JK, finally be connected to the power supply the other end; The long-range pass valve normal open switch DL2 the other end connect to close the valve relay J GW normally closed switch that puts in place again successively, closed moment relay J GG normally closed switch, open the coil of valve relay JK normally closed switch and pass valve relay JG, finally be connected to the power supply the other end, remote control switch is held on the spot respectively and is opened valve normal open switch SB1 one end on the spot and close valve normal open switch SB2 one end on the spot and be connected, opening the valve normal open switch SB1 the other end on the spot is connected with the above-mentioned long-range valve Chang Kaikai valve DL1 the other end of opening, closing the valve Chang Kaikai valve SB2 the other end on the spot is connected with the above-mentioned long-range pass valve normal open switch DL2 the other end, open valve relay JK normal open switch and to open valve normal open switch SB1 on the spot in parallel, close valve relay JG normal open switch and to close valve Chang Kaikai valve SB2 on the spot in parallel, contain the programmable controller PLC and the control circuit of frequency speed regulator and the peripheral circuit of variable-frequency governor in the utility model are prior art, are not described specifically at this.Wherein the model of PLC is 6ES7 214/IBD22/OBXO.

When switch is put when long-range, can long-rangely carry out various manipulations controls to valve, when switch is put this locality, can handle control to valve on the spot, and switch is put when stopping, control circuit quits work.And the valve position control circuit can valve the switch situation feed back.

Adopt programmable controller PLC to combine with frequency variator, control program can use multiple universal programming programming, and test modifications, adjustment repeatedly, can satisfy user's operation requirement to greatest extent.

Claims

1, a kind of non-return butterfly valve, it comprises butterfly valve body (1), the transmission device (2) that is connected the control valve switch with butterfly valve body (1), the Electric actuator that cooperates with transmission device (3), the electric device (4) of control Electric actuator, it is characterized in that: electric device comprises the control circuit that contains programmable controller (PLC), the circuit for remotely controlling that is connected with the control circuit input end that contains programmable controller (PLC), valve position control circuit and contain the peripheral circuit of variable-frequency governor, be connected with the control circuit output terminal of programmable controller (PLC) circuit for remotely controlling, valve position control circuit and peripheral circuit.

2, non-return butterfly valve as claimed in claim 1, it is characterized in that, circuit for remotely controlling is: remote control switch (SA1) middle end is connected with power supply one end, remote port is connected with long-range pass valve normal open switch (DL2) end with long-range valve normal open switch (DL1) end of opening respectively, long-range open valve normal open switch (DL1) the other end connect successively again open valve put in place relay (JKW) normally closed switch, opened moment relay (JKG) normally closed switch, closed valve relay (JG) normally closed switch and opened the coil of valve relay (JK), finally be connected to the power supply the other end; Long-range pass valve normal open switch (DL2) the other end connect to close valve relay (JGW) normally closed switch that puts in place again successively, closed moment relay (JGG) normally closed switch, open the coil of valve relay (JK) normally closed switch and pass valve relay (JG), finally be connected to the power supply the other end, remote control switch is held on the spot respectively and is opened valve normal open switch (SB1) end on the spot and close valve normal open switch (SB2) end on the spot and be connected, opening valve normal open switch (SB1) the other end on the spot is connected with above-mentioned long-range valve Chang Kaikai valve (DL1) the other end of opening, closing valve Chang Kaikai valve (SB2) the other end on the spot is connected with above-mentioned long-range pass valve normal open switch (DL2) the other end, open valve relay (JK) normal open switch and to open valve normal open switch (SB1) on the spot in parallel, close valve relay (JG) normal open switch and to close valve Chang Kaikai valve (SB2) on the spot in parallel.

3, hydraulic butterfly check valve as claimed in claim 1 is characterized in that, the valve position control circuit is: be installed in the butterfly valve body (1) open valve put in place often open near switch (SQ3-4) with open put in place the coil of relay (JKW) of valve and be connected in series in both ends of power; The moment of opening that is installed in the butterfly valve body (1) is often opened near switch (SQ1) and the coil of driving moment relay (JKG) and is connected in series in both ends of power; Be installed in pass valve in the butterfly valve body (1) put in place often open near switch (SQ5-6) with open put in place the coil of relay (JGW) of valve and be connected in series in both ends of power; Be installed in pass in the butterfly valve body (1) moment often open near switch (SQ2) and the coil that closed moment relay (JGG) and be connected in series in both ends of power.