CN217813746U

CN217813746U - Braking air brake control system of generator set

Info

Publication number: CN217813746U
Application number: CN202221448541.7U
Authority: CN
Inventors: 庞锋; 林银花; 罗柳军
Original assignee: Guangxi Guiguan Electric Power Co ltd; Longan Jinjitan Power Plant Of Guangxi Guiguan Electric Power Co ltd
Current assignee: Guangxi Guiguan Electric Power Co ltd; Longan Jinjitan Power Plant Of Guangxi Guiguan Electric Power Co ltd
Priority date: 2022-06-10
Filing date: 2022-06-10
Publication date: 2022-11-15
Anticipated expiration: 2032-06-10

Abstract

The utility model discloses a generating set braking air brake control system, which comprises a brake, motorised valve M1, motorised valve M2, input control circuit, withdraw from control circuit, DC power supply, AC power supply and power inverter, power inverter's input corresponds respectively and is connected with DC power supply and AC power supply, power inverter's output is connected with respectively and drops into control circuit, withdraw from control circuit, motorised valve M1's power return and motorised valve M2's power return, the closed switch that triggers that drops into control circuit connects on motorised valve M2's power return, the closed switch that triggers that withdraws from control circuit connects on motorised valve M1's power return, and motorised valve M1 and motorised valve M2 are shutting each other, in order control brake to brake or the operation of returning. The utility model discloses a braking air brake braking control system adopts power inverter to supply power, and power inverter is by two way mains operated of alternating current power supply and DC power supply, ensures braking air brake control system's reliable power supply.

Description

Braking air brake control system of generator set

Technical Field

The utility model relates to a power station generating set technical field, especially a generating set braking air brake control system.

Background

After receiving the shutdown command, whether the unit can be reliably shut down is the most basic requirement. The reliable input of the brake is an effective means for preventing the unit equipment accidents such as bearing bush burning and the like caused by the fact that the oil film of the bearing is damaged due to the long-time idle running of the unit. At present, when a plant alternating current power supply disappears, a brake can not be normally switched on or off, if a wind brake switching-on or switching-off indicator lamp can not be normally lighted after the plant alternating current power supply is powered on again, the brake can not be ensured to be reliably switched on, the unit can be idled, and the unit equipment damage event can occur.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a to above-mentioned problem, provide a generating set braking air brake control system, can ensure that generating set can normally shut down under the unusual condition that the alternating current power supply of whole factory disappears.

In order to achieve the above purpose, the utility model adopts the technical proposal that:

the braking air brake control system of the generator set comprises a brake, an electric valve M1, an electric valve M2, an input control loop, an exit control loop, a direct current power supply, an alternating current power supply and a power supply inverter, wherein the input end of the power supply inverter is respectively and correspondingly connected with the direct current power supply and the alternating current power supply, the output end of the power supply inverter is respectively connected with the input control loop, the exit control loop, the power supply loop of the electric valve M1 and the power supply loop of the electric valve M2, a triggering closing switch of the input control loop is connected to the power supply loop of the electric valve M2, a triggering closing switch of the exit control loop is connected to the power supply loop of the electric valve M1, and the electric valve M1 and the electric valve M2 are mutually locked to control the brake to brake or reset.

The input control loop comprises a relay KA1, an indicating red light HL1, a field input button SA contact I and an upper computer input switch, a trigger closing switch of the input control loop is a normally open contact I of the relay KA1, the field input button SA contact I and the upper computer input switch are connected in parallel and then connected with a coil of the relay KA1, and the indicating red light HL1 is connected with the coil of the relay KA1 in parallel to form the input control loop. The upper computer input switch is a normally open switch element and is connected to the upper computer so as to be controlled by the upper computer to be closed and conducted. When the device is used, the contact I of the upper computer input switch or the field input button SA is closed and conducted, the coil of the relay KA1 is electrified to act, the normally open contact I of the relay KA1 is closed and conducted, the power supply loop of the electric valve M2 is electrified to open the exhaust gas path of the resetting cavity, and the resetting cavity of the brake exhausts gas to perform braking operation (input braking).

The exit control loop comprises a relay KA2, an indicating green lamp HL2, a field exit button FA contact I and an upper computer exit switch, a trigger closing switch of the exit control loop is a relay KA2 normally open contact I, the field exit button FA contact I and the upper computer exit switch are connected in parallel and then connected with a relay KA2 coil, and the indicating green lamp HL2 is connected in parallel with the relay KA2 coil to form the exit control loop. The upper computer exit switch is a normally open switch element and is connected to the upper computer so as to be controlled by the upper computer to be closed and conducted. When the device is used, the contact I of the upper computer exit switch or the field exit button FA is closed and conducted, the coil of the relay KA2 is electrified to act, the normally open contact I of the relay KA2 is closed and conducted, the power supply loop of the electric valve M1 is electrified to open the exhaust gas path of the control cavity, and the exhaust of the brake cavity of the brake carries out resetting operation (exit brake).

As mentioned above, the power supply of the braking air brake control system of the generator set is supplied by the power supply inverter device, the power supply inverter device is supplied by two paths of power supplies, the power supply inverter device is normally supplied by the station AC power supply, when the AC power supply is powered off, the DC power supply is supplied by the DC power supply, the DC power supply is inverted into the AC power supply to realize power supply, the continuous power supply of the braking air brake control system is ensured, and the reliability is improved.

As an option, in one example, the site input button SA contact II is connected to the exit control circuit, and the site input button SA contact II is a closed contact linked with the contact I thereof, and when the site input brake operation is performed, the site input button SA contact II is linked to open the exit control circuit, thereby ensuring that no malfunction occurs.

As an option, in one example, the field quit button FA contact II is connected to the input control circuit, the field quit button FA contact II is a closed contact linked with the contact I, and when the field quit brake operation is performed, the field quit button FA contact II is linked to open and disconnect the input control circuit, so that the misoperation is avoided.

As an option, in an example, the normally open contact II of the relay KA1 is connected in series with the normally closed contact of the relay KA2 and then connected in parallel with the contact I of the field-input button SA to form a self-holding circuit for input braking, so as to perform a self-holding function.

As an option, in one example, the normally open contact II of the relay KA2 is connected with the normally closed contact of the relay KA1 in series and then connected with the contact I of the field exit button FA in parallel to form an exit brake self-holding circuit, and the exit brake self-holding circuit plays a self-holding role. And a coil of the relay KA2 is connected with a time relay T1 in parallel, the delay time is 5-10S, typically 6, 7 or 8S, and the function of time delay exit is achieved.

As an option, in one example, the output end of the power inverter is connected to the input control loop, the exit control loop, the power loop of the electric valve M1 and the power loop of the electric valve M2 through the air switch, respectively, for breaking and safety.

Due to the adoption of the technical scheme, the utility model discloses following beneficial effect has:

1. the utility model discloses a generating set braking air brake control system, generating set braking air brake braking control system power supply is supplied power by power inverter, and power inverter is by two way mains operated of alternating current power supply and DC power supply, by the house service AC power supply under the normal condition, by the DC power supply after AC power supply outage, with the DC contravariant becoming the alternating current in order to realize the power supply this moment, ensure that braking air brake control system continuously has the electricity, improve the reliability.

2. A brake-on/brake-off self-holding circuit can be formed to function as a self-holding circuit for continuously holding the brake-on/brake-off operation after the brake-on/brake-off operation is performed.

Drawings

Fig. 1 is a circuit diagram of the present invention.

Fig. 2 is an enlarged view of the upper half of fig. 1.

Fig. 3 is an enlarged view of the lower half of fig. 1.

Fig. 4 is a block diagram of the brake and the electric valve gas circuit connection of the present invention.

Detailed Description

Examples

Referring to fig. 1-4, the braking air brake control system of the generator set of this embodiment includes a brake, an electric valve M1, an electric valve M2, an input control loop, an exit control loop, a dc power supply, an ac power supply, and a power supply inverter, wherein an input end of the power supply inverter is respectively and correspondingly connected with the dc power supply and the ac power supply, an output end of the power supply inverter is respectively connected with the input control loop, the exit control loop, a power supply loop of the electric valve M1, and a power supply loop of the electric valve M2, a trigger closing switch of the input control loop is connected to the power supply loop of the electric valve M2, a trigger closing switch of the exit control loop is connected to the power supply loop of the electric valve M1, and the electric valve M1 and the electric valve M2 are connected to each other, so as to control the brake to perform braking or resetting operation.

The input control circuit and the exit control circuit will be described below by taking a relay control circuit as an example, and other existing circuits having the same function and function may be used instead.

The input control loop comprises a relay KA1, an indicating red light HL1, a field input button SA contact I and an upper computer input switch D044, a trigger closing switch of the input control loop is the normally open contact I of the relay KA1, the field input button SA contact I and the upper computer input switch are connected in parallel and then connected with a coil of the relay KA1, and the indicating red light HL1 is connected with the coil of the relay KA1 in parallel to form the input control loop. The upper computer input switch D044 is a normally open switch element and is connected to the upper computer to be controlled by the upper computer to be closed and conducted; the input switch D044 of the upper computer and the upper computer thereof are all the existing technologies, typically a relay control circuit, and are not described herein again. When the device is used, the contact I of the upper computer input switch or the field input button SA is closed and conducted, the coil of the relay KA1 is electrified to act, the normally open contact I of the relay KA1 is closed and conducted, the power supply loop of the electric valve M2 is electrified to open the exhaust gas path of the resetting cavity, and the resetting cavity of the brake exhausts gas to perform braking operation (input braking).

The quitting control loop comprises a relay KA2, an indicating green lamp HL2, a field quitting button FA contact I and an upper computer quitting switch D045, a trigger closing switch of the quitting control loop is the relay KA2 normally open contact I, the field quitting button FA contact I and the upper computer quitting switch are connected in parallel and then connected with a relay KA2 coil, and the indicating green lamp HL2 is connected with the relay KA2 coil in parallel to form the quitting control loop. The upper computer exit switch D045 is a normally open switch element and is connected to the upper computer to be controlled by the upper computer to be closed and conducted; the upper computer exit switch D045 and the upper computer thereof are all of the prior art, typically, such as a relay control circuit, and are not described herein again. When the device is used, the contact I of the upper computer exit switch or the field exit button FA is closed and conducted, the coil of the relay KA2 is electrified to act, the normally open contact I of the relay KA2 is closed and conducted, the power supply loop of the electric valve M1 is electrified to open the exhaust gas path of the control cavity, and the exhaust of the brake cavity of the brake carries out resetting operation (exit brake).

The brake and the electric valves M1 and M2 are connected in a circuit manner as shown in figure 3, the gas circuit connection is as shown in figure 4, existing equipment such as a negative pressure fan and the like can be adopted to provide a P pressure gas source, the electric valve M1 is opened to feed air into a brake cavity, the electric valve M1 is closed to discharge air from the brake cavity, the electric valve M2 is opened to discharge air from a resetting cavity, the electric valve M2 is closed to feed air into the resetting cavity, and the brake cavity and the resetting cavity are switched to be inflated and discharged to realize brake air brake control.

As mentioned above, the power supply of the braking air brake control system of the generator set is supplied by the power supply inverter, the power supply inverter is supplied by two paths of power supplies, the power supply inverter is normally supplied by the factory alternating current power supply, when the alternating current power supply is powered off, the direct current power supply is supplied by the direct current power supply, the direct current power supply is inverted into the alternating current power supply to realize power supply, the continuous power supply of the braking air brake control system is ensured, and the reliability is improved.

As an option, in one example, the field quit button FA contact II is connected to the input control loop, the field quit button FA contact II is a closed contact linked with the contact I, and when the field quit brake operation is performed, the field quit button FA contact II is linked to open the input control loop, so that the misoperation is avoided.

As an option, in an example, the normally open contact II of the relay KA2 is connected in series with the normally closed contact of the relay KA1 and then connected in parallel with the contact I of the field release button FA to form a release brake self-holding circuit, so as to perform a self-holding function. And a coil of the relay KA2 is connected with a time relay T1 in parallel, the delay time is 5-10S, typically 6, 7 or 8S, and the function of delayed exit is achieved.

As an option, in one example, the input control loop, the exit control loop, the power loop of the electric valve M1 and the power loop of the electric valve M2 are respectively connected to the output end of the power inverter through an air switch for breaking and safety.

As shown in fig. 1 to 4, the braking control system of the braking air brake of the generator set according to the preferred embodiment is composed of a power supply inverter, an electric valve, a relay, a control button and the like, and is installed in a braking control cabinet. The power supply inverter is an existing component, and is typically a dual-power supply inverter power supply device of CT200/220-500 VA. When the air switch is installed, firstly, proper cables are selected according to capacity, a circuit is laid, one path of alternating current power supply of a power supply cabinet beside a machine is connected, one path of direct current power supply of a direct current system is connected to the input end of a power supply of a double-power-supply inversion device, the output end of the direct current system is connected to the upper end of an air switch K2, and relevant marks and line marks are made; then, connecting the power supply of the brake electric valve and the power supply of the control loop to the inner side of the corresponding terminal, connecting the power supply output end of the double-power-supply inverter device to the outer side of the corresponding terminal, and making related marks and line labels; and finally, in a shutdown state, the power supply is respectively disconnected from the air switch, and the brake cabinet on-off brake is tested and debugged under the condition that the AC/DC power supply is simulated to be disconnected and disappear.

The braking air brake control system of the generator set is supplied with power by the power supply inverter, the power supply inverter is supplied with power by two paths of power supplies, namely an alternating current power supply and a direct current power supply, and is supplied with power by a factory alternating current power supply under normal conditions.

It should be noted that, one or more than two examples of the above embodiments may be preferably combined with each other according to actual needs, a plurality of examples are illustrated by a set of drawings with combined technical features, and the exit switch of the upper computer and the upper computer connected thereto are implemented by using existing technologies, which are not necessarily described herein.

The above description is intended to illustrate and describe the preferred embodiments of the invention, but not to limit the scope of the invention, and all equivalent changes and modifications made in accordance with the teachings of the present invention are intended to be covered by the present invention.

Claims

1. The utility model provides a generating set braking air brake control system which characterized in that: the brake control system comprises a brake, an electric valve M1, an electric valve M2, an input control loop, a quit control loop, a direct current power supply, an alternating current power supply and a power supply inverter, wherein the input end of the power supply inverter is correspondingly connected with the direct current power supply and the alternating current power supply respectively, the output end of the power supply inverter is connected with the input control loop, the quit control loop, the power supply loop of the electric valve M1 and the power supply loop of the electric valve M2 respectively, a trigger closing switch of the input control loop is connected onto the power supply loop of the electric valve M2, the trigger closing switch of the quit control loop is connected onto the power supply loop of the electric valve M1, and the electric valve M1 and the electric valve M2 are locked with each other to control the brake to perform braking or resetting operation.

2. The genset brake control system of claim 1 wherein: the input control loop comprises a relay KA1, an indicating red light HL1, a field input button SA contact I and an upper computer input switch, a trigger closing switch of the input control loop is a normally open contact I of the relay KA1, the field input button SA contact I and the upper computer input switch are connected in parallel and then connected with a coil of the relay KA1, and the indicating red light HL1 is connected with the coil of the relay KA1 in parallel to form the input control loop.

3. The genset brake control system of claim 2 wherein: the on-site input button SA contact II is connected to an exit control loop; the upper computer input switch is a normally open switch element and is connected to the upper computer to be controlled by the upper computer to be closed and conducted.

4. The genset brake control system of claim 2 wherein: the quitting control loop comprises a relay KA2, an indicating green lamp HL2, a field quitting button FA contact I and an upper computer quitting switch, a trigger closing switch of the quitting control loop is a relay KA2 normally open contact I, the field quitting button FA contact I and the upper computer quitting switch are connected in parallel and then connected with a relay KA2 coil, and the indicating green lamp HL2 is connected with the relay KA2 coil in parallel to form the quitting control loop.

5. The genset brake control system of claim 4 wherein: the field quit button FA contact II is connected to the input control loop; the upper computer exit switch is a normally open switch element and is connected to the upper computer so as to be controlled by the upper computer to be closed and conducted.

6. The genset brake control system of claim 4 wherein: and the normally open contact II of the relay KA1 is connected with the normally closed contact of the relay KA2 in series and then connected with the contact I of the on-site input button SA in parallel.

7. The genset brake control system of claim 4 wherein: the normally open contact II of the relay KA2 is connected with the normally closed contact of the relay KA1 in series and then connected with the field exit button FA contact I in parallel, and a time relay T1 is connected to a coil of the relay KA2 in parallel.

8. The genset brake control system of claim 4 wherein: the output end of the power supply inverter is respectively connected with an input control loop, an exit control loop, a power supply loop of an electric valve M1 and a power supply loop of an electric valve M2 through an air switch.