CN215681801U - Coal road local fan power supply operation circuit - Google Patents
Coal road local fan power supply operation circuit Download PDFInfo
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- CN215681801U CN215681801U CN202121857558.3U CN202121857558U CN215681801U CN 215681801 U CN215681801 U CN 215681801U CN 202121857558 U CN202121857558 U CN 202121857558U CN 215681801 U CN215681801 U CN 215681801U
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Abstract
The utility model discloses a power supply operation circuit for a coal roadway local fan, which comprises a first power supply, a second power supply, a first main office control circuit, a first standby office control circuit, a second main office control circuit and a second standby office control circuit which are sequentially numbered, wherein the first power supply and the second power supply come from a second section of bus of a substation; the first main office control circuit, the first standby office control circuit, the second main office control circuit and the second standby office control circuit have the same structure; the utility model has the advantages that: the air supply can not be interrupted on the working face, the gas concentration of the working face is prevented from exceeding the limit, potential safety hazards are eliminated, and the safety of the working face is guaranteed.
Description
Technical Field
The utility model relates to the technical field of power supply of local fans of coal mines, in particular to a power supply operation circuit of a local fan of a coal roadway.
Background
At present, the following three power supply modes are generally adopted in a power supply mode of a local fan of a coal mine:
1. power supply mode adopting single power supply and same line
The power supply mode is simple, but when the power supply line and the electric equipment of the coal roadway working face are in failure, the office fan of the working face stops working, and therefore the gas concentration of the working face exceeds the standard. Therefore, the power supply reliability of the mode is poor, and great potential safety hazard exists.
2. Three-special two-locking technology using single power supply
The third special is that the power supply equipment of the local fan adopts a special transformer, a special cable and a special switch, and the double-locking is wind power locking and gas power locking. The locking system has the function that power can be supplied to the electrical equipment on the working face of the coal roadway only when the local fan is in normal operation for air supply and the concentration of gas in the working face of the coal roadway does not exceed the specification. Once the local fan stops running, the power supply can be automatically cut off; when the gas concentration of the coal roadway working face exceeds the specification, the power supply in the control range of the probe is automatically cut off, and the local fan continues to operate; if the gas concentration in the local fan stopping and wind stopping area exceeds the specification, the local fan is locked.
The power supply mode is that the electric equipment and the local fan on the working face of the coal roadway are still the same power supply but different loops. The power supply circuit of the electrical equipment on the coal roadway working face is separated from the power supply circuit of the local fan, and when the power supply circuit on the coal roadway working face has faults of short circuit, electric leakage and the like, the normal operation of the local fan on the coal roadway working face is not influenced. However, once the power supply is in power failure for maintenance or mechanical and electrical faults occur, the operation of the local fan is affected, so that great potential safety hazards exist, and further improvement is needed.
3. Three-special two-locking technology adopting double power supplies
In order to ensure the implementation of three-special two-locking, the three-special two-locking technology of the single power supply is changed into a double power supply, and all local fans adopt a more flexible, safer and more reliable power supply mode of three-special two-locking of the double power supply. However, once the main local fan device fails, the operation of the local fan is affected when the standby local fan cannot be started, so that the gas concentration on the working surface is out of limit, and great potential safety hazards exist.
To sum up, the existing power supply mode of the local fan in the coal mine has great potential safety hazard.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a coal mine local fan power supply mode in the prior art has larger potential safety hazard.
The utility model solves the technical problems through the following technical means: a power supply operation circuit for a coal roadway local fan comprises a first power supply, a second power supply, a first main office control circuit, a first standby office control circuit, a second main office control circuit and a second standby office control circuit which are sequentially numbered, wherein the first power supply and the second power supply come from a second section of bus of a substation, the third power supply and the fourth power supply come from a first section of bus of the substation, the first power supply is connected with the second main office control circuit, the second power supply is connected with the first standby office control circuit, the third power supply is connected with the second standby office control circuit, and the fourth power supply is connected with the first main office control circuit; the first main office control circuit, the first standby office control circuit, the second main office control circuit and the second standby office control circuit are identical in structure, the first main office control circuit comprises a transformer, a main feed switch and a plurality of office fans which are connected in sequence, the primary side of the transformer is connected with a fourth power supply, each office fan is connected with a plurality of fans, and air outlets of all the fans are communicated with an air inlet of an air duct.
The utility model has the advantages that the first main office control circuit, the first standby office control circuit, the second main office control circuit and the second standby office control circuit are connected with different power supplies, the office fan work of the circuit of other power supplies is not influenced when one power supply fails or is overhauled, the first power supply and the second power supply which respectively supply power to the second main office control circuit and the first standby office control circuit come from the second section of bus of a substation, the fourth power supply and the third power supply which respectively supply power to the first main office control circuit and the second standby office control circuit come from the first section of bus of the substation, even if one bus power supply in the second section of bus of the substation or the bus of the first section of bus of the substation is overhauled or failed, the power supply of the bus circuit which does not fail or is overhauled normally runs, the whole scheme ensures that at least one office fan runs, ensures that the air supply is not interrupted on the working face, and avoids the gas concentration of the working face from exceeding the limit, the potential safety hazard is eliminated, and the safety of the working face is guaranteed.
Furthermore, there are two local fans in the first main office control circuit, and each local fan is connected with two fans.
Furthermore, there are two air ducts, the first standby control circuit and the local fan in the first main control circuit share one air duct, and the second main control circuit and the local fan in the second standby control circuit share one air duct.
Furthermore, the first section of bus of the substation and the second section of bus of the substation are buses of the substation in the coal mining area.
Furthermore, the models of the first power supply to the fourth power supply are all PBG-10.
Further, the transformer is of a type KBSG-630/10.
Further, the model of the main feed switch is KBZ16-630 or BKD 16-630Z.
Furthermore, the type of the local fan is BKD16-400Z or KBZ-400.
The utility model has the advantages that: the utility model has the advantages that the first main office control circuit, the first standby office control circuit, the second main office control circuit and the second standby office control circuit are connected with different power supplies, the office fan work of the circuit of other power supplies is not influenced when one power supply fails or is overhauled, the first power supply and the second power supply which respectively supply power to the second main office control circuit and the first standby office control circuit come from the second section of bus of a substation, the fourth power supply and the third power supply which respectively supply power to the first main office control circuit and the second standby office control circuit come from the first section of bus of the substation, even if one bus power supply in the second section of bus of the substation or the bus of the first section of bus of the substation is overhauled or failed, the power supply of the bus circuit which does not fail or is overhauled normally runs, the whole scheme ensures that at least one office fan runs, ensures that the air supply is not interrupted on the working face, and avoids the gas concentration of the working face from exceeding the limit, the potential safety hazard is eliminated, and the safety of the working face is guaranteed.
Drawings
Fig. 1 is a schematic diagram of a power supply operation circuit of a coal roadway local fan disclosed by the utility model.
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 embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, a power supply operation circuit for a coal roadway local fan includes a first power supply 1 to a fourth power supply 4, a first main office control circuit 5, a first standby office control circuit 6, a second main office control circuit 7, and a second standby office control circuit 8, which are numbered in sequence, where the first power supply 1 and the second power supply 2 are from a bus of a section ii of a substation, the third power supply 3 and the fourth power supply 4 are from a bus of a section i of the substation, the first power supply 1 is connected with the second main office control circuit 7, the second power supply 2 is connected with the first standby office control circuit 6, the third power supply 3 is connected with the second standby office control circuit 8, and the fourth power supply 4 is connected with the first main office control circuit 5.
The first main office control circuit 5, the first standby office control circuit 6, the second main office control circuit 7 and the second standby office control circuit 8 are identical in structure, wherein the first main office control circuit 5 comprises a transformer 9, a main feed switch 11 and a plurality of office fans 12 which are sequentially connected, the primary side of the transformer 9 is connected with the fourth power supply 4, each office fan 12 is connected with a plurality of fans, and air outlets of all the fans are communicated with air inlets of air ducts.
The number of the local fans 12 in the first main office control circuit 5 is two, and each local fan 12 is connected with two fans. The number of the air ducts is two, the first standby control circuit 6 and the local fan 12 in the first main control circuit 5 share one air duct, and the second main control circuit 7 and the local fan 12 in the second standby control circuit 8 share one air duct. And the first section of bus of the substation and the second section of bus of the substation are buses of the substation in the coal mining area. The models of the first power supply 1 to the fourth power supply 4 are all PBG-10. The transformer 9 is of a type KBSG-630/10. The type of the main feed switch 11 is KBZ16-630 or BKD 16-630Z. The model of the local fan 12 is BKD16-400Z or KBZ-400.
In practical application, the office fans 12 in the first main office control circuit 5, the first standby office control circuit 6, the second main office control circuit 7 and the second standby office control circuit 8 may be simultaneously turned on, or only one or more of them may be turned on, but in order to ensure the implementation effect, the main and standby office control circuits are generally turned on alternately at fixed periods, and the two control circuits turned on in each fixed period must be turned on in different bus sections of the substation, for example, the first main office control circuit 5 and the second main office control circuit 7 are turned on in the current fixed period, and the first standby office control circuit 6 and the second standby office control circuit 8 are turned on in the next fixed period.
During the overhaul period of the substation, two local fans 12 are still guaranteed to normally operate, if the high-protection switch of the I section of the bus of the substation is in power failure overhaul period, each local fan 12 in the first main office control circuit 5 and the second standby office control circuit 8 stops operating due to overhaul, the local fan 12 in the first standby office control circuit 6 is started (the operating state of the local fan 12 is changed from the operation of the original first main office control circuit 5 and the original second main office control circuit 7 into the operation of the first standby office control circuit 6 and the second main office control circuit 7), all the operating local fans 12 are still distributed on two sections of low-voltage switches in the substation, namely two different power supplies, the phenomenon of load concentration cannot occur, the risk of tripping caused by equipment faults such as overload and the like is reduced, the service life of the equipment is prolonged, and safe and stable air supply on the head is guaranteed.
When any one of the local fans 12 running in the maintenance period has a fault, at least another local fan 12 can still run normally, and uninterrupted air supply of a working face is guaranteed.
The coal mine working face is different in air supply quantity according to actual conditions, different operation modes can be selected and switched along with the air supply quantity demand, and safety is guaranteed. When the air quantity demand is not large, the control circuits of two operation local fans 12 in different bus sections in the substation can respectively select to start a first stage; and gradually increasing and starting the secondary local fan 12 along with the increase of the requirement of the extended air volume of the tunnel, and flexibly selecting. When the motor or the circuit of a certain office fan 12 has an unexpected fault, other motors can still ensure the operation of a private office, and the safety is ensured.
Through the technical scheme, the first main office control circuit 5, the first standby control circuit 6, the second main office control circuit 7 and the second standby control circuit 8 of the utility model are connected with different power supplies, the work of a office fan 12 of a circuit where other power supplies are positioned is not influenced when one power supply fails or is overhauled, a first power supply 1 and a second power supply 2 which respectively supply power to the second main office control circuit 7 and the first standby control circuit 6 come from a bus of a section II of a substation, a fourth power supply 4 and a third power supply 3 which respectively supply power to the first main office control circuit 5 and the second standby control circuit 8 come from a bus of the section I of the substation, even if one bus power supply in the bus of the section II of the substation or one bus power supply in the bus of the section I of the substation is overhauled or has a fault, the power supply of the circuit where the bus which does not have the fault or is overhauled normally operates, the whole scheme ensures that at least one office fan 12 is operated, the air supply can not be interrupted on the working face, the gas concentration of the working face is prevented from exceeding the limit, potential safety hazards are eliminated, and the safety of the working face is guaranteed.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. A power supply operation circuit for a coal roadway local fan is characterized by comprising a first power supply, a second power supply, a first main office control circuit, a first standby office control circuit, a second main office control circuit and a second standby office control circuit which are sequentially numbered, wherein the first power supply and the second power supply come from a bus of a section II of a substation, the third power supply and the fourth power supply come from a bus of a section I of the substation, the first power supply is connected with the second main office control circuit, the second power supply is connected with the first standby office control circuit, the third power supply is connected with the second standby office control circuit, and the fourth power supply is connected with the first main office control circuit; the first main office control circuit, the first standby office control circuit, the second main office control circuit and the second standby office control circuit are identical in structure, the first main office control circuit comprises a transformer, a main feed switch and a plurality of office fans which are connected in sequence, the primary side of the transformer is connected with a fourth power supply, each office fan is connected with a plurality of fans, and air outlets of all the fans are communicated with an air inlet of an air duct.
2. A coal roadway local fan power supply operating circuit as claimed in claim 1, wherein there are two local fans in the first main office control circuit, and each local fan is connected to two fans.
3. The coal roadway local fan power supply operation circuit according to claim 1, wherein there are two air ducts, the local fan in the first standby control circuit and the first main control circuit shares an air duct, and the local fan in the second main control circuit and the second standby control circuit shares an air duct.
4. The coal roadway local fan power supply operation circuit as claimed in claim 1, wherein the first section bus of the substation and the second section bus of the substation are buses of a substation in a coal mining area.
5. A coal roadway local fan power supply operating circuit as claimed in claim 1, wherein the first power supply to the fourth power supply are all PBG-10 in type.
6. A coal roadway fan power supply operating circuit as claimed in claim 1, wherein the transformer is of type KBSG-630/10.
7. A coal roadway fan power supply operating circuit as claimed in claim 1, wherein the type of the main feed switch is KBZ16-630 or BKD 16-630Z.
8. The power supply operation circuit of the coal roadway local fan as claimed in claim 1, wherein the local fan is of BKD16-400Z or KBZ-400.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121857558.3U CN215681801U (en) | 2021-08-09 | 2021-08-09 | Coal road local fan power supply operation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121857558.3U CN215681801U (en) | 2021-08-09 | 2021-08-09 | Coal road local fan power supply operation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215681801U true CN215681801U (en) | 2022-01-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121857558.3U Active CN215681801U (en) | 2021-08-09 | 2021-08-09 | Coal road local fan power supply operation circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215681801U (en) |
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2021
- 2021-08-09 CN CN202121857558.3U patent/CN215681801U/en active Active
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