CN212518844U

CN212518844U - Detection loop of fire-resistant oil cooling regeneration control system

Info

Publication number: CN212518844U
Application number: CN202021172065.1U
Authority: CN
Inventors: 詹爽; 李双龙; 冯泰峰; 高源龙; 刘伟哲
Original assignee: Datang Qitaihe Power Generation Co Ltd
Current assignee: Datang Qitaihe Power Generation Co Ltd
Priority date: 2020-06-19
Filing date: 2020-06-19
Publication date: 2021-02-09
Anticipated expiration: 2030-06-19

Abstract

The utility model relates to a fire-resistant oil cooling regeneration control system detection circuitry, include: the system comprises three phase lines, a motor M and a feedback loop, wherein the wiring terminal of the motor M is connected with the three phase lines, the feedback loop is connected between a B-phase power supply and a zero line N in series, a coil of a voltage relay YJ1 is connected between an A-phase power supply and a C-phase power supply in series, one end of a normally open contact YJ1.1 of the voltage relay YJ1 is connected with a public end, and the other end of the normally open contact YJ1.1 of the voltage relay YJ1 is connected with a normally open contact KM1.2 of a contactor KM1 in series and then connected with a DCS centralized control system; the utility model discloses the return circuit is simple reliable, can effectively reflect equipment running state, avoids appearing feedback and the actual non-corresponding state appearance, and simple structure, the installation of being convenient for need not to carry out the large tracts of land and changes and can accomplish, and the nature of leaning on is high, can actual monitoring running state, and the practicality is strong.

Description

Detection loop of fire-resistant oil cooling regeneration control system

Technical Field

The utility model belongs to the technical field of fire resistant oil regeneration system, concretely relates to fire resistant oil cooling regeneration control system detection circuitry.

Background

Electric power is an important energy source in the life and production of people at present, and has important influence on national construction. The main development mode of our country at present is thermal power, and in order to satisfy people's electric energy user demand, current unit capacity constantly increases, and in order to guarantee the normal clear of electricity generation process, the unit generally can use fire-resistant oil to the realization is to the unit lubrication and stability, promotes the generating efficiency. The use of the fire resistant oil ensures the normal operation of the current high-power and high-capacity unit and ensures the stability of the power generation process. However, the operation state detection loop of the existing power plant fire resistant oil cooling regeneration control system is simple in signal transmission, cannot ensure the reflection of the operation state, and the contactor and the excitation motor may not operate; the current uploading monitoring system needs to be additionally provided with equipment and lay a long cable, and signal interference needs to be considered; the running state is judged through the temperature of the fire-resistant oil, so that certain delay is realized, and the equipment monitoring is not facilitated.

SUMMERY OF THE UTILITY MODEL

The utility model overcomes the deficiencies in the prior art, the technical problem who solves is: the detection loop of the anti-fuel cooling regeneration control system is simple in structure, convenient to install, convenient to transform and accurate in measurement.

In order to solve the technical problem, the utility model discloses a technical scheme be: a fire resistant oil cooling regeneration control system detection circuit comprising: the three-phase power supply comprises three phase lines, a motor M and a feedback loop, wherein the wiring end of the motor M is connected with the three phase lines, a breaker QF1, a normally open contact KM1.1 of a contactor KM1 and a coil of a thermal relay FR1 are connected in series between the motor M and the three phase lines at one time, the feedback loop is connected in series between a B-phase power supply and a zero line N, the coil of a voltage relay YJ1 is connected in series between an A-phase power supply and a C-phase power supply, one end of the normally open contact YJ1.1 of the voltage relay YJ1 is connected with a public end, and the other end of the normally open contact YJ1.1 of the voltage relay YJ1 is connected with a normally open contact KM1.2 of a contactor.

Preferably, the feedback loop comprises a start button SB1 and a stop button SB2, a breaker QF2, a start button SB1, a stop button SB2, a coil of a contactor KM1 and a normally closed contact FR1.1 of a thermal relay FR1 are sequentially connected between the B-phase power supply and the neutral wire N in series, and a normally open contact KM1.3 of the contactor KM1 is connected in parallel at two ends of the start button SB 1.

Preferably, the feedback loop comprises a remote start button SB3 and a remote stop button SB4, the remote start button SB3 being connected in parallel across the start button SB1, the remote stop button SB4 being connected in series between the stop button SB2 and the coil of the contactor KM1.

Preferably, the alarm device further comprises an alarm device AL and a contactor KM2, wherein a starting button SB5 of the alarm device AL, a closing button SB6 of the alarm device AL and a coil of the contactor KM2 are sequentially connected between any two-phase power supplies in series, and a normally open contact KM2.1 of the contactor KM2 is connected to two ends of a starting button SB5 of the alarm device AL in parallel; a normally open contact KM2.2 of a contactor KM2, a normally closed contact KM1.4 of a contactor KM1 and an alarm AL are sequentially connected between any phase power supply and a zero line N in series.

Preferably, the safety device also comprises a fuse FU1 which is connected in series between the alarm AL and the neutral wire N.

Preferably, the alarm AL comprises at least one of: a sound emitting element for emitting a sound signal and a light emitting element for emitting a light signal.

Preferably, the voltage relay YJ1 is a 380V voltage relay.

Compared with the prior art, the utility model following beneficial effect has:

1. the utility model relates to a fire resistant oil cooling regeneration control system detection loop, the control power is taken from power supply B phase, and 380V voltage relay is added between power supply A, C phase for monitoring 380V three-phase power supply; a normally open contact YJ1.1 of a voltage relay YJ1 is connected to an operation feedback loop of the fire-resistant oil cooling regeneration system, and only when a power supply is electrified and a coil of an alternating current contactor KM1 is excited and a normally open contact KM1.2 of a contactor KM1 is closed, the DCS centralized control system can receive operation feedback information; the utility model has simple and reliable loop, can effectively reflect the running state of the equipment, and avoids the occurrence of feedback and actual non-corresponding state; use voltage relay commonly used to carry out the overlap joint and can reach the effect, use the component popularization, different voltage levels can be changed by oneself, and the original paper is small, the transformation position is few, occupation space not, simple structure, the installation of being convenient for need not to carry out the large tracts of land and changes and can accomplish, and the nature of leaning on is high, can actual monitoring running state, and the practicality is strong.

2. The utility model discloses still include alarm AL, contactor KM2, when the motor was shut down because of electric reason breaks down, can the automatic start alarm send failure alarm signal to be convenient for the timely discovery of trouble, reduce the loss that causes because of the trouble.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1 is an electrical schematic diagram of a detection loop of a fire-resistant oil cooling regeneration control system according to a first embodiment of the present invention;

fig. 2 is an electrical schematic diagram of a detection loop of a fire-resistant oil cooling regeneration control system according to a second embodiment of the present invention;

fig. 3 is an electrical schematic diagram of a detection loop of a fire-resistant oil cooling regeneration control system according to a third embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention; based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Fig. 1 is an electrical schematic diagram of a fire-resistant oil cooling regeneration control system detection loop provided in the first embodiment of the present invention, as shown in fig. 1, a fire-resistant oil cooling regeneration control system detection loop includes: the three-phase power supply comprises three phase lines, a motor M and a feedback loop, wherein the wiring end of the motor M is connected with the three phase lines, a breaker QF1, a normally open contact KM1.1 of a contactor KM1 and a coil of a thermal relay FR1 are connected in series between the motor M and the three phase lines at one time, the feedback loop is connected in series between a B-phase power supply and a zero line N, the coil of a voltage relay YJ1 is connected in series between an A-phase power supply and a C-phase power supply, one end of the normally open contact YJ1.1 of the voltage relay YJ1 is connected with a public end, and the other end of the normally open contact YJ1.1 of the voltage relay YJ1 is connected with a normally open contact KM1.2 of a contactor.

Further, the feedback loop comprises a starting button SB1 and a stopping button SB2, a coil of a breaker QF2, a starting button SB1, a stopping button SB2, a contactor KM1 and a normally closed electric contact FR1.1 of a thermal relay FR1 are sequentially connected between the B-phase power supply and the neutral wire N in series, and a normally open contact KM1.3 of the contactor KM1 is connected at two ends of the starting button SB1 in parallel.

When the system is used, the circuit breakers QF1 and QF2 are closed, a power supply is led into a detection loop, when a starting button SB1 is pressed, a coil of the contactor KM1 is electrified, a normally open contact KM1.1 of the contactor KM1, a normally open contact KM1.2 of the contactor KM1 and a normally open contact KM1.3 of the contactor KM1 are closed, if a three-phase power supply is electrified, a voltage relay YJ1 is electrified, a normally open contact YJ1.1 of the voltage relay YJ1 is closed, information of an operating state of an anti-fuel oil cooling regeneration control system is sent to a DCS centralized control system, and a worker accurately judges the operating state of the anti-fuel oil cooling regeneration control system, the control power supply in the embodiment is taken from a power supply B phase, and a 380V voltage relay is additionally arranged between power supply A, C phases and used for monitoring the 380V; a normally open contact YJ1.1 of a voltage relay YJ1 is connected to an operation feedback loop of the fire-resistant oil cooling regeneration system, and only when a power supply is electrified and a coil of an alternating current contactor KM1 is excited and a normally open contact KM1.2 of a contactor KM1 is closed, the DCS centralized control system can receive operation feedback information; the loop of the embodiment is simple and reliable, the running state of the equipment can be effectively reflected, and the feedback and actual non-corresponding state is avoided; use voltage relay commonly used to carry out the overlap joint and can reach the effect, use the component popularization, different voltage levels can be changed by oneself, and the original paper is small, the transformation position is few, occupation space not, simple structure, the installation of being convenient for need not to carry out the large tracts of land and changes and can accomplish, and the nature of leaning on is high, can actual monitoring running state, and the practicality is strong.

In the embodiment, the coil of the voltage relay YJ1, the power cable and the feedback cable do not carry current, and a 1.5 square millimeter multi-strand cable is used; when the DCS/PLC feedback state and the actual operation state possibly have a non-corresponding state, the adjustment can be carried out by using the method.

Fig. 2 is an electrical schematic diagram of a detection loop of a fire-resistant oil cooling regeneration control system according to a second embodiment of the present invention, as shown in fig. 2, the feedback loop includes a remote start button SB3 and a remote stop button SB4, the remote start button SB3 is connected in parallel to both ends of a start button SB1, and the remote stop button SB4 is connected in series between a stop button SB2 and a coil of a contactor KM 1; when the device is used, the circuit breakers QF1 and QF2 are closed, so that a power supply is introduced into a detection loop, when a background worker presses a remote start button SB3, a coil of the contactor KM1 is electrified, a normally open contact KM1.1 of the contactor KM1, a normally open contact KM1.2 of the contactor KM1 and a normally open contact KM1.3 of the contactor KM1 are closed, if a three-phase power supply is electrified, a voltage relay YJ1 is electrified, a normally open contact YJ1.1 of the voltage relay YJ1 is closed, and information that the anti-fuel oil cooling regeneration control system is in a running state is sent to a DCS centralized control system; in the embodiment, by adding the remote start button SB3 and the remote stop button SB4, the working personnel can conveniently perform remote operation in the background, and the working efficiency and the safety are improved.

Fig. 3 is an electrical schematic diagram of a detection loop of a fire-resistant oil cooling regeneration control system according to a third embodiment of the present invention, as shown in fig. 3, further including an alarm AL and a contactor KM2, wherein a start button SB5 of the alarm AL, a close button SB6 of the alarm AL, and a coil of the contactor KM2 are sequentially connected in series between any two-phase power supplies, and a normally open contact KM2.1 of the contactor KM2 is connected in parallel at two ends of a start button SB5 of the alarm AL; a normally open contact KM2.2 of a contactor KM2, a normally closed contact KM1.4 of a contactor KM1 and an alarm AL are sequentially connected between any phase power supply and a zero line N in series, as shown in figure 3, a starting button SB5 of the alarm AL, a closing button SB6 of the alarm AL and coils of the contactor KM2 are connected between an A-phase power supply and a C-phase power supply in series, a normally open contact KM2.2 of a contactor KM2, a normally closed contact KM1.4 of a contactor KM1 and the alarm AL are connected between the A-phase power supply and the zero line N in series,

and the fuse FU1 is connected in series between the alarm AL and the zero line N, so that the damage of the circuit overload or short circuit to the elements in the circuit is prevented, and the type of the fuse FU1 can be selected according to the element with the minimum rated current in the circuit.

The alarm AL comprises at least one of: a sound emitting element for emitting a sound signal and a light emitting element for emitting a light signal; the sounding element comprises an electric bell, a loudspeaker, a buzzer and the like; the light emitting elements include incandescent lamps, organic light emitting diode arrays, and the like.

When the device is used, the breaker QF1 and the breaker QF2 are closed, a power supply is introduced into a detection loop, when the start button SB1 is pressed, the coil of the contactor KM1 is electrified, the normally-open contact KM1.1 of the contactor KM1, the normally-open contact KM1.2 of the contactor KM1 and the normally-open contact KM1.3 of the contactor KM1 are closed, the normally-closed contact KM1.4 of the contactor 685km 2 is opened, the start button SB5 of the alarm AL is pressed, the coil of the contactor KM2 is electrified, the normally-open contact KM2.1 of the contactor KM2 and the normally-open contact KM2.2 of the contactor KM2 are closed, the alarm AL is in an activated state, when the motor M1 is affected by abnormal electrical factors (such as overload, overcurrent, phase failure, short circuit, three-phase imbalance and the like), at least one contact of the thermal relays FR1 is opened, so that a circuit is cut off, and when the normally-open contact KM1 is changed from closed contact KM1.3 to open contact KM 894, enabling the alarm AL to start to send out audible and visual alarm signals; in the embodiment, when the motor is in failure shutdown due to electrical reasons, the alarm device can be automatically started to send out a failure alarm signal, so that the failure can be timely found, and the loss caused by the failure is reduced.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A fire resistant oil cooling regeneration control system detection circuit comprising: three-phase line, motor M and feedback loop that three phase current drawn forth, motor M's wiring end links to each other its characterized in that with three-phase line: the motor M and the three-phase line are connected with a breaker QF1, a normally open contact KM1.1 of a contactor KM1 and a coil of a thermal relay FR1 in series at one time, a feedback loop is connected between a B-phase power supply and a zero line N in series, a coil of a voltage relay YJ1 is connected between an A-phase power supply and a C-phase power supply in series, one end of a normally open contact YJ1.1 of the voltage relay YJ1 is connected with a public end, and the other end of the normally open contact YJ1.1 of the voltage relay YJ1 is connected with a normally open contact KM1.2 of a contactor KM1 in series and then connected with a.

2. The detection circuit of the fire-resistant oil cooling regeneration control system according to claim 1, characterized in that: the feedback loop comprises a starting button SB1 and a stopping button SB2, a coil of a breaker QF2, a starting button SB1, a stopping button SB2, a contactor KM1 and a normally closed electric contact FR1.1 of a thermal relay FR1 are sequentially connected between a B-phase power supply and a neutral wire N in series, and a normally open contact KM1.3 of the contactor KM1 is connected with two ends of the starting button SB1 in parallel.

3. The detection circuit of the fire-resistant oil cooling regeneration control system according to claim 2, characterized in that: the feedback loop comprises a remote start button SB3 and a remote stop button SB4, the remote start button SB3 being connected in parallel across the start button SB1, the remote stop button SB4 being connected in series between the stop button SB2 and the coil of the contactor KM1.

4. The detection circuit of the fire-resistant oil cooling regeneration control system according to claim 1, characterized in that: the alarm device comprises an alarm AL and a contactor KM2, wherein a starting button SB5 of the alarm AL, a closing button SB6 of the alarm AL and a coil of the contactor KM2 are sequentially connected between any two-phase power supplies in series, and a normally open contact KM2.1 of the contactor KM2 is connected to two ends of a starting button SB5 of the alarm AL in parallel; a normally open contact KM2.2 of a contactor KM2, a normally closed contact KM1.4 of a contactor KM1 and an alarm AL are sequentially connected between any phase power supply and a zero line N in series.

5. The detection circuit of the fire-resistant oil cooling regeneration control system according to claim 4, characterized in that: the safety alarm further comprises a fuse FU1 which is connected between the alarm AL and the zero line N in series.

6. The detection circuit of the fire-resistant oil cooling regeneration control system according to claim 4, characterized in that: the alarm AL comprises at least one of: a sound emitting element for emitting a sound signal and a light emitting element for emitting a light signal.

7. The detection circuit of the fire-resistant oil cooling regeneration control system according to claim 1, characterized in that: the voltage relay YJ1 is a 380V voltage relay.