CN217183029U - Secondary power supply circuit in flame-proof type low-voltage combined feed device - Google Patents
Secondary power supply circuit in flame-proof type low-voltage combined feed device Download PDFInfo
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- CN217183029U CN217183029U CN202220849752.5U CN202220849752U CN217183029U CN 217183029 U CN217183029 U CN 217183029U CN 202220849752 U CN202220849752 U CN 202220849752U CN 217183029 U CN217183029 U CN 217183029U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
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Abstract
The utility model provides a secondary power supply circuit among flame-proof type low pressure combination feed device, including two inlet wires, transformer T1, contactor KM1, KM2, switching power supply U1, UPS, circuit breaker ZK1, ZK2, branch master switch ZK3 to and at least one branch's power supply line; the first incoming line is used for connecting self-supply alternating voltage; the second circuit of inlet wires is used for connecting an external supply alternating voltage; two paths of incoming lines are provided, and external supply alternating current voltage can be switched and used when the mining explosion-proof mobile substation is powered off; the UPS is arranged to ensure that the power equipment is not powered off when power supply is switched; two inlet wires pass through contactor KM1 and realize interlocking, can not mutual interference.
Description
Technical Field
The utility model relates to a supply circuit, especially a secondary power supply circuit of flame-proof type low pressure combination feed device.
Background
The flameproof low-voltage combined feeder is underground common equipment such as a coal mine and the like, is used for converting 1140v or 660v alternating current into 220v or 133v alternating current and providing power for electric equipment such as an electric chassis, a network camera, a heater in a cabinet and the like; once the current secondary power supply module has a power failure accident, the power supply module can not supply power for the electric equipment, and the power supply requirement of the underground electric equipment can not be met.
Disclosure of Invention
The embodiment of the utility model provides a secondary power supply circuit among flame-proof type low pressure combination feed device, it has two way inlet wires and has interlocking protection to UPS has been increased and uninterrupted power supply has been realized. In order to realize the technical purpose, the embodiment of the utility model provides an adopt technical scheme is:
the embodiment of the utility model provides a secondary power supply circuit among flame-proof type low pressure combination feed device, including two inlet wires, transformer T1, contactor KM1, KM2, switching power supply U1, UPS, circuit breaker ZK1, ZK2, branch master switch ZK3 to and at least one branch power supply line;
the first incoming line is used for connecting self-supply alternating voltage; two incoming lines of the first incoming line are respectively connected with two primary ends of a transformer T1, one secondary end of the transformer T1 is connected with one end of a first pair of a breaker ZK1, the other end of the first pair of the breaker ZK1 is connected with one end of a coil of a contactor KM1 and one end of a normally open contact KM1-1 of a contactor KM1, and the other end of the normally open contact KM1 KM1-1 is connected with one end of a normally open contact KM2, one end of a normally open contact KM2-1 of the contactor KM2 and one end of the UPS input side; the other secondary end of the transformer T1 is connected with one end of a second junction of the breaker ZK1, the other end of the second junction of the breaker ZK1 is connected with the other end of a coil of a contactor KM1 and one end of a normally open contact KM1-2 of a contactor KM1, and the other end of the normally open contact KM1-2 of the contactor KM1 is connected with one end of a normally open contact KM2-2 of the contactor KM2 and the other end of the input side of the UPS;
the second circuit of inlet wires is used for connecting an external supply alternating voltage; one incoming line of the second incoming line is connected with one end of the first link of the breaker ZK2, the other end of the first link of the breaker ZK2 is connected with one end of a normally closed contact KM1, namely KM1-3, and the other end of the normally closed contact KM1-3 of the contactor KM1 is connected with one end of a normally open contact KM2-1 of the contactor KM2 and one end of the input side of the UPS; the other incoming line of the second incoming line is connected with one end of a second contact of the breaker ZK2, the other end of the second contact of the breaker ZK2 is connected with one end of a normally closed contact KM1-4 of a contactor KM1, and the other end of a normally closed contact KM1-4 of a contactor KM1 is connected with one end of a normally open contact KM2 KM2-2 and the other end of the input side of the UPS;
one input side end of a switching power supply U1 is connected with the other end of a normally open contact KM1-1 of a contactor KM1 and the other end of a normally closed contact KM1-3 of a contactor KM1, and the other input side end of a switching power supply U1 is connected with the other end of a normally open contact KM1 KM1-2 of a contactor KM1 and the other end of a normally closed contact KM1-4 of a contactor KM 1; two ends of the output side of the switching power supply U1 are respectively connected with two ends of the coil of the contactor KM 2;
one end of the output side of the UPS is connected with one end of a normally closed contact KM2-3 of a contactor KM2, and the other end of the output side of the UPS is connected with one end of a normally closed contact KM2-4 of a contactor KM 2; the other end of the normally closed contact KM2-3 of the contactor KM2 is connected with the other end of the normally open contact KM2, the other end of the normally open contact KM2-1 and one end of a first joint of a branch main switch ZK 3; the other end of the normally closed contact KM2-4 of the contactor KM2 is connected with the other end of the normally open contact KM2, which is 2-2, and the second joint end of a branch main switch ZK 3;
the other end of the first link and the other end of the second link of the branch master switch ZK3 are used for connecting branch power supply lines.
Preferably, two incoming lines of the first incoming line are respectively provided with fuse FU1 and FU 2.
Specifically, the branch power supply line comprises a branch switch 1ZK, a normally-open gated switch S1, a relay K1 and a low-voltage comprehensive protector;
one end of the first connection of the branch switch 1ZK is connected with the other end of the first connection of the branch main switch ZK3, and the other end of the first connection of the branch switch 1ZK is connected with one end of the gating switch S1 and one end of a normally open contact K1-1 of a relay K1; one end of the second branch of the branch switch 1ZK is connected with the other end of the second branch of the branch main switch ZK3, and the other end of the second branch of the branch switch 1ZK is connected with one end of a coil of a relay K1 and one end of a normally open contact K1-2 of a relay K1; the other end of the coil of the relay K1 is connected with the other end of the gating switch S1; the other end of the normally open contact K1-1 and the other end of the normally open contact K1-2 of the relay K1 are respectively connected with two ends of the input side of the low-voltage comprehensive protector; the output side of the low-voltage comprehensive protector is used for connecting electric equipment.
The embodiment of the utility model provides a beneficial effect that technical scheme brought is:
1) two paths of incoming wires are provided, and external supply alternating current voltage can be switched and used when the mining explosion-proof mobile substation is powered off.
2) The UPS is arranged, so that the power utilization equipment is guaranteed not to be powered off when power supply is switched.
3) Two inlet wires pass through contactor KM1 and realize interlocking, can not mutual interference.
Drawings
Fig. 1 is an electrical schematic diagram of a secondary power supply circuit according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
As shown in fig. 1, the embodiment of the utility model provides a secondary power supply circuit in flame-proof type low pressure combination feed device, including two inlet wires, transformer T1, contactor KM1, KM2, switching power supply U1, UPS, circuit breaker ZK1, ZK2, branch master switch ZK3 and at least one branch power supply line;
the first incoming line is used for connecting self-supply alternating voltage; the self-supply alternating voltage is 1140v or 660v alternating voltage output by the mining explosion-proof mobile substation; two incoming lines of the first incoming line are respectively connected with two primary ends of a transformer T1, one secondary end of the transformer T1 is connected with one end of a first pair of a breaker ZK1, the other end of the first pair of the breaker ZK1 is connected with one end of a coil of a contactor KM1 and one end of a normally open contact KM1-1 of a contactor KM1, and the other end of the normally open contact KM1 KM1-1 is connected with one end of a normally open contact KM2, one end of a normally open contact KM2-1 of the contactor KM2 and one end of the UPS input side; the other secondary end of the transformer T1 is connected with one end of a second junction of the breaker ZK1, the other end of the second junction of the breaker ZK1 is connected with the other end of a coil of a contactor KM1 and one end of a normally open contact KM1-2 of a contactor KM1, and the other end of the normally open contact KM1-2 of the contactor KM1 is connected with one end of a normally open contact KM2-2 of the contactor KM2 and the other end of the input side of the UPS;
the second circuit of inlet wires is used for connecting an external supply alternating voltage; the external supply alternating voltage is 220v alternating voltage of one path under the mine; one incoming line of the second incoming line is connected with one end of the first link of the breaker ZK2, the other end of the first link of the breaker ZK2 is connected with one end of a normally closed contact KM1, namely KM1-3, and the other end of the normally closed contact KM1-3 of the contactor KM1 is connected with one end of a normally open contact KM2-1 of the contactor KM2 and one end of the input side of the UPS; the other incoming line of the second incoming line is connected with one end of a second contact of the breaker ZK2, the other end of the second contact of the breaker ZK2 is connected with one end of a normally closed contact KM1-4 of a contactor KM1, and the other end of a normally closed contact KM1-4 of a contactor KM1 is connected with one end of a normally open contact KM2 KM2-2 and the other end of the input side of the UPS;
one input side end of a switching power supply U1 is connected with the other end of a normally open contact KM1-1 of a contactor KM1 and the other end of a normally closed contact KM1-3 of a contactor KM1, and the other input side end of a switching power supply U1 is connected with the other end of a normally open contact KM1 KM1-2 of a contactor KM1 and the other end of a normally closed contact KM1-4 of a contactor KM 1; two ends of the output side of the switching power supply U1 are respectively connected with two ends of the coil of the contactor KM 2;
one end of the output side of the UPS is connected with one end of a normally closed contact KM2-3 of a contactor KM2, and the other end of the output side of the UPS is connected with one end of a normally closed contact KM2-4 of a contactor KM 2; the other end of the normally closed contact KM2-3 of the contactor KM2 is connected with the other end of the normally open contact KM2, the other end of the normally open contact KM2-1 and one end of a first joint of a branch main switch ZK 3; the other end of the normally closed contact KM2-4 of the contactor KM2 is connected with the other end of the normally open contact KM2, which is 2-2, and the second joint end of a branch main switch ZK 3;
the other end of the first link and the other end of the second link of the branch master switch ZK3 are used for connecting branch power supply lines.
Under normal conditions, the mining explosion-proof mobile substation outputs self-supply alternating-current voltage, a breaker ZK1 is closed, a coil of a contactor KM1 is electrified, normally closed contacts KM1, KM1-1 and KM1-2 are closed, and a switching power supply U1 and a UPS are electrified; a coil of a contactor KM2 at the output side of the switching power supply U1 is electrified, and normally open contacts KM2-1 and KM2-2 of a contactor KM2 are closed; if the branch main switch ZK3 is closed, each branch power supply line can obtain the alternating current after the voltage of the self-supply alternating current voltage is reduced by the transformer T1; meanwhile, the normally closed contacts KM2-3 and KM2-4 of a contactor KM2 on the output side of the UPS are disconnected, so that the UPS can store electric energy but does not need to output the electric energy;
when the mining explosion-proof mobile substation stops outputting due to some reason (such as short-circuit protection), the coil of the contactor KM1 loses power, the normally open contacts KM1-1 and KM1-2 of the contactor KM1 are disconnected, the normally closed contacts KM1-3 and KM1-4 are closed, at this time, the switching power supply U1 is powered off, the coil of the contactor KM2 is powered off instantly, the normally open contacts KM2-1 and KM2-2 of the contactor KM2 are disconnected, and the normally closed contacts KM2-3 and KM2-4 are closed, so that the UPS can immediately output electric energy;
when the UPS supplies power, a period of time is sufficient for switching to use the second incoming line; at the moment, the breaker ZK2 is closed, the switching power supply U1 and the UPS are powered on, the coil of the contactor KM2 is powered on, so that the normally open contacts KM2-1 and KM2-2 of the contactor KM2 are closed instantly, the normally closed contacts KM2-3 and KM2-4 are disconnected, the external alternating voltage of the second incoming line supplies power to each branch power supply line, the output side of the UPS does not supply power continuously because the normally closed contacts KM2-3 and KM2-4 are disconnected, and the UPS can store electric energy but does not need to output the electric energy;
as the optimization of the embodiment, two incoming lines of the first incoming line are respectively provided with safety FU1 and FU 2; providing overcurrent and short-circuit protection functions;
in the present embodiment, the circuit forms of the branch power supply lines are the same; in the embodiment, a total of 12 branch power supply circuits are arranged; take the first branch supply line as an example;
the branch power supply line comprises a branch switch 1ZK, a normally-open type gating switch S1, a relay K1 and a low-voltage comprehensive protector; in the flame-proof type low-voltage combined feed device, one or more feed units can be combined, each feed unit is provided with a door, and a door control switch S1 is closed when the door on the feed unit is closed;
one end of the first connection of the branch switch 1ZK is connected with the other end of the first connection of the branch main switch ZK3, and the other end of the first connection of the branch switch 1ZK is connected with one end of the gating switch S1 and one end of a normally open contact K1-1 of a relay K1; one end of the second branch of the branch switch 1ZK is connected with the other end of the second branch of the branch main switch ZK3, and the other end of the second branch of the branch switch 1ZK is connected with one end of a coil of a relay K1 and one end of a normally open contact K1-2 of a relay K1; the other end of the coil of the relay K1 is connected with the other end of the gating switch S1; the other end of the normally open contact K1-1 and the other end of the normally open contact K1-2 of the relay K1 are respectively connected with two ends of the input side of the low-voltage comprehensive protector; the output side of the low-voltage comprehensive protector is used for connecting electric equipment, such as an electric chassis vehicle, illumination in a cabinet and the like;
when a door on the feed unit is closed, the door control switch S1 is closed, the branch switch 1ZK is closed, the coil of the relay K1 is electrified, the normally open contacts K1-1 and K1-2 of the relay K1 are closed, and the low-voltage comprehensive protector is electrified and can supply power for electric equipment; when a door on the feed unit is opened, the door control switch S1 is switched off, at the moment, the coil of the relay K1 loses power, the normally open contacts K1-1 and K1-2 of the relay K1 are switched off, the low-voltage comprehensive protector loses power, and all electric equipment loses power, so that the live-wire operation is prevented, and the danger is avoided.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the examples, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.
Claims (3)
1. A secondary power supply circuit in an explosion-proof low-voltage combined feed device is characterized by comprising two incoming lines, a transformer T1, a contactor KM1, a contactor KM2, a switching power supply U1, a UPS, a breaker ZK1, a ZK2, a branch main switch ZK3 and at least one branch power supply line;
the first incoming line is used for connecting self-supply alternating voltage; two incoming lines of the first incoming line are respectively connected with two primary ends of a transformer T1, one secondary end of the transformer T1 is connected with one end of a first pair of a breaker ZK1, the other end of the first pair of the breaker ZK1 is connected with one end of a coil of a contactor KM1 and one end of a normally open contact KM1-1 of a contactor KM1, and the other end of the normally open contact KM1 KM1-1 is connected with one end of a normally open contact KM2, one end of a normally open contact KM2-1 of the contactor KM2 and one end of the UPS input side; the other secondary end of the transformer T1 is connected with one end of a second junction of the breaker ZK1, the other end of the second junction of the breaker ZK1 is connected with the other end of a coil of a contactor KM1 and one end of a normally open contact KM1-2 of a contactor KM1, and the other end of the normally open contact KM1-2 of the contactor KM1 is connected with one end of a normally open contact KM2-2 of the contactor KM2 and the other end of the input side of the UPS;
the second circuit of inlet wires is used for connecting an external supply alternating voltage; one incoming line of the second incoming line is connected with one end of the first link of the breaker ZK2, the other end of the first link of the breaker ZK2 is connected with one end of a normally closed contact KM1, namely KM1-3, and the other end of the normally closed contact KM1-3 of the contactor KM1 is connected with one end of a normally open contact KM2-1 of the contactor KM2 and one end of the input side of the UPS; the other incoming line of the second incoming line is connected with one end of a second contact of the breaker ZK2, the other end of the second contact of the breaker ZK2 is connected with one end of a normally closed contact KM1-4 of a contactor KM1, and the other end of a normally closed contact KM1-4 of a contactor KM1 is connected with one end of a normally open contact KM2 KM2-2 and the other end of the input side of the UPS;
one input side end of a switching power supply U1 is connected with the other end of a normally open contact KM1-1 of a contactor KM1 and the other end of a normally closed contact KM1-3 of a contactor KM1, and the other input side end of a switching power supply U1 is connected with the other end of a normally open contact KM1 KM1-2 of a contactor KM1 and the other end of a normally closed contact KM1-4 of a contactor KM 1; two ends of the output side of the switching power supply U1 are respectively connected with two ends of the coil of the contactor KM 2;
one end of the output side of the UPS is connected with one end of a normally closed contact KM2-3 of a contactor KM2, and the other end of the output side of the UPS is connected with one end of a normally closed contact KM2-4 of a contactor KM 2; the other end of the normally closed contact KM2-3 of the contactor KM2 is connected with the other end of the normally open contact KM2, the other end of the normally open contact KM2-1 and one end of a first joint of a branch main switch ZK 3; the other end of the normally closed contact KM2-4 of the contactor KM2 is connected with the other end of the normally open contact KM2, which is 2-2, and the second joint end of a branch main switch ZK 3;
the other end of the first link and the other end of the second link of the branch master switch ZK3 are used for connecting branch power supply lines.
2. The secondary power supply circuit in the flameproof low-voltage combined feed device of claim 1,
two incoming lines of the first incoming line are respectively provided with a fuse FU1 and a fuse FU 2.
3. The secondary power supply circuit in the flameproof low-voltage combined feed device of claim 1,
the branch power supply line comprises a branch switch 1ZK, a normally-open type gating switch S1, a relay K1 and a low-voltage comprehensive protector;
one end of the first connection of the branch switch 1ZK is connected with the other end of the first connection of the branch main switch ZK3, and the other end of the first connection of the branch switch 1ZK is connected with one end of the gating switch S1 and one end of a normally open contact K1-1 of a relay K1; one end of the second branch of the branch switch 1ZK is connected with the other end of the second branch of the branch main switch ZK3, and the other end of the second branch of the branch switch 1ZK is connected with one end of a coil of a relay K1 and one end of a normally open contact K1-2 of a relay K1; the other end of the coil of the relay K1 is connected with the other end of the gating switch S1; the other end of the normally open contact K1-1 and the other end of the normally open contact K1-2 of the relay K1 are respectively connected with two ends of the input side of the low-voltage comprehensive protector; the output side of the low-voltage comprehensive protector is used for connecting electric equipment.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220849752.5U CN217183029U (en) | 2022-04-13 | 2022-04-13 | Secondary power supply circuit in flame-proof type low-voltage combined feed device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220849752.5U CN217183029U (en) | 2022-04-13 | 2022-04-13 | Secondary power supply circuit in flame-proof type low-voltage combined feed device |
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| CN217183029U true CN217183029U (en) | 2022-08-12 |
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| CN202220849752.5U Active CN217183029U (en) | 2022-04-13 | 2022-04-13 | Secondary power supply circuit in flame-proof type low-voltage combined feed device |
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