CN212409148U - Safety protection circuit of mine cooling system - Google Patents
Safety protection circuit of mine cooling system Download PDFInfo
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- CN212409148U CN212409148U CN202021067441.0U CN202021067441U CN212409148U CN 212409148 U CN212409148 U CN 212409148U CN 202021067441 U CN202021067441 U CN 202021067441U CN 212409148 U CN212409148 U CN 212409148U
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Abstract
A safety protection circuit of a mine cooling system relates to the technical field of underground coal mine cooling, and solves the problem of how to avoid the frost cracking of a corrugated copper pipe in a refrigerator; the positive pole and the negative pole of the 220V power supply are connected with the comprehensive circuit protection device through a miniature circuit breaker; the refrigerator remote control circuit comprises a remote control selection switch, a remote control closing button and a first normally open contact of a shutdown relay of the refrigeration pump, wherein the remote control selection switch, the remote control closing button, the circuit comprehensive protection device and the high-voltage circuit breaker are sequentially connected in series and then connected with a 220V power supply through a miniature circuit breaker; the remote control selection switch, a first normally open contact of a shutdown relay of the freezing pump, the comprehensive circuit protection device and the high-voltage circuit breaker are sequentially connected in series and then connected with a 220V power supply through the miniature circuit breaker; the refrigerator near control circuit, the line comprehensive protection device and the high-voltage circuit breaker are sequentially connected in series and then connected with a 220V power supply through a miniature circuit breaker; the freezing and cracking accidents of the corrugated copper pipe in the refrigerator are avoided, the safety protection function of the refrigerating system is optimized, and the safety of the refrigerating system is improved.
Description
Technical Field
The utility model belongs to the technical field of colliery is the temperature in the pit, concretely relates to mine cooling system safety protection circuit.
Background
The underground coal mine cooling system is provided with a group of heat and electric refrigerating units according to refrigerating capacity, a chilled water circulating pump is installed on the primary side of a ground refrigerating machine room, when the chilled water circulating pump stops running due to faults, a refrigerating unit cannot stop running and still continues to work, and the chilled water circulating pump cannot timely pump out chilled water in the refrigerating unit due to faults, so that the chilled water in the refrigerating unit can be frozen, and a corrugated copper pipe in the unit is frozen. The cost for replacing one corrugated copper pipe (the corrugated copper pipe and labor) is about 1000 yuan, the proportion of the frozen copper pipe caused by one fault is calculated according to 50%, and the economic loss is more than 45 ten thousand yuan; and when the coal mine is produced, once the refrigerating unit stops operating, the temperature of most underground working faces and the temperature of the tunneling head exceed the limit, so that the influence and loss caused by sunstroke of workers and face stop are extremely large.
Therefore, how to solve the problem that the refrigerating unit stops running when the refrigerating pump stops running is urgent, and meanwhile, an alarm is sent to remind an operator to check the fault reason in time and corresponding treatment is made.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that solve lies in how to realize that refrigerating unit also the bring to rest and send alarm signal when the freezing pump bring to rest to avoid the occurence of failure of corrugated copper pipe frost crack in the refrigerator.
The utility model discloses a solve above-mentioned technical problem through following technical scheme.
A safety protection circuit of a mine cooling system comprises a 220V power supply, a miniature circuit breaker (10), a line comprehensive protection device (1), a high-voltage circuit breaker (2), a refrigerator remote control circuit and a refrigerator near control circuit; the positive pole and the negative pole of the 220V power supply are connected with the comprehensive circuit protection device (1) through a miniature circuit breaker (10); the refrigerator remote control circuit comprises a remote control selection switch (11), a remote control closing button (14) and a first normally open contact (16) of a shutdown relay of a freezing pump, wherein the remote control selection switch (11), the remote control closing button (14), a line comprehensive protection device (1) and a high-voltage circuit breaker (2) are sequentially connected in series and then connected with a 220V power supply through a miniature circuit breaker (10); the remote control selection switch (11), a first normally open contact (16) of a shutdown relay of the freezing pump, the comprehensive circuit protection device (1) and the high-voltage circuit breaker (2) are sequentially connected in series and then connected with a 220V power supply through the miniature circuit breaker (10); the refrigerator near control circuit, the line comprehensive protection device (1) and the high-voltage circuit breaker (2) are sequentially connected in series and then connected with a 220V power supply through a miniature circuit breaker (10).
First normally open contact (16) of shut down relay through the cryopump and remote control option switch (11), circuit integrated protection device (1), high voltage circuit breaker (2) establish ties in proper order, in case the extrinsic cycle cryopump stop operation, the first normally open contact (16) of shut down relay of cryopump are closed, high voltage circuit breaker (2) separating brake, the refrigerator stops the operation immediately, the occurence of failure of corrugated copper pipe frost crack in the refrigerator has been avoided, refrigerating system's safety protection function has been optimized, very big improvement refrigerating system's safety.
As the utility model discloses technical scheme's further improvement, mine cooling system safety protection circuit still include alarm circuit, alarm circuit include DC24V power, the shut down relay second normally open contact (31) of freezing pump, auxiliary relay (32), auxiliary relay normally open contact (33), warning electric bell (34), the shut down relay second normally open contact (31) of freezing pump, establish ties with auxiliary relay (32) and connect at DC24V power both ends, after auxiliary relay normally open contact (33) establish ties with warning electric bell (34) at DC24V power both ends.
As a further improvement of the technical scheme of the utility model, the refrigerator near control circuit comprises a near control selection switch (12), a near control switch-on button (13) and a near control switch-off button (15); the near control selection switch (12), the near control closing button (13), the line comprehensive protection device (1) and the high-voltage circuit breaker (2) are sequentially connected in series and then connected with a 220V power supply through a miniature circuit breaker (10); the near-control selection switch (12), the near-control opening button (15), the line comprehensive protection device (1) and the high-voltage circuit breaker (2) are sequentially connected in series and then connected with a 220V power supply through the miniature circuit breaker (10).
As the utility model discloses technical scheme's further improvement, mine cooling system safety protection circuit still include quick-break overtemperature overvoltage protection unit (17), circuit integrated protection device (1), high voltage circuit breaker (2) establish ties in proper order after be connected with the 220V power through miniature circuit breaker (10).
As the technical scheme of the utility model further improves, high voltage circuit breaker (2) still include shutting unit (24), the positive, negative pole of 220V power is passed through miniature circuit breaker (10) and is connected with shutting unit (24).
As the further improvement of the technical proposal of the utility model, the model of the line comprehensive protection device (1) is NSP 788.
As the further improvement of the technical proposal of the utility model, the model of the high-voltage circuit breaker (2) is a 10kV high-voltage vacuum circuit breaker, the model is zw32-12/630 a.
As the further improvement of the technical proposal of the utility model, the refrigerating machine is two groups of electric refrigerating units, and the refrigerating capacity is not lower than 2 multiplied by 6 MW.
As a further improvement of the technical proposal of the utility model, the model of the refrigerator is YKQ2QRK35 DHG.
The utility model has the advantages that:
(1) first normally open contact (16) of shut down relay through the cryopump and remote control option switch (11), circuit integrated protection device (1), high voltage circuit breaker (2) establish ties in proper order, in case the extrinsic cycle cryopump stop operation, the first normally open contact (16) of shut down relay of cryopump are closed, high voltage circuit breaker (2) separating brake, the refrigerator stops the operation immediately, the occurence of failure of corrugated copper pipe frost crack in the refrigerator has been avoided, refrigerating system's safety protection function has been optimized, very big improvement refrigerating system's safety.
(2) An alarm circuit is designed, and when the external circulation refrigerating pump stops operating, the alarm circuit gives an alarm to prompt a worker to maintain in time.
(3) A quick-break overtemperature overvoltage protection unit is designed to protect quick break, overtemperature and CT overvoltage of a circuit.
(4) The locking unit is designed, and when a circuit fault is detected, the locking unit is used for locking the high-voltage circuit breaker to prevent the high-voltage circuit breaker from being closed in a fault state to cause an accident.
(5) The high-voltage circuit breaker is a 10kV high-voltage vacuum circuit breaker with the model of zw32-12/630a, the rated power frequency withstand voltage of the high-voltage vacuum circuit breaker can reach 42kV, the weight is light, and the mechanical life is long.
(6) The line comprehensive protection device is NSP788, and is high in test precision, strong in anti-interference capacity and reliable in protection action.
(7) The refrigerating capacity of the refrigerating machine is 1 multiplied by 6MW, the refrigerating capacity of the two groups of electric refrigerating units is 2 multiplied by 6MW, and 3 refrigerating units are connected in parallel for operation. The two groups of electric refrigerating unit units are manufactured by York corporation, the model is YKQ2QRK35DHG, the power of a refrigerating motor of the model is 1328KW, the voltage grade is 10KV, the refrigerating capacity is large, the operation is stable and reliable, and the electric refrigerating unit is suitable for mines.
Drawings
FIG. 1 is a control schematic diagram of a refrigerator high-voltage cabinet of a safety protection circuit of a mine cooling system according to an embodiment of the present invention;
FIG. 2 is an alarm schematic diagram of a safety protection circuit of a mine cooling system according to an embodiment of the present invention;
FIG. 3 is a diagram of the electrical main wiring of the refrigerator of the safety protection circuit of the mine cooling system according to the embodiment of the present invention;
fig. 4 is an electrical main wiring diagram of a freezing pump of a safety protection circuit of a mine cooling system according to an embodiment of the present invention;
fig. 5 the utility model discloses PLC control refrigerator shutdown procedure picture of mine cooling system safety protection circuit.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. 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.
The technical solution of the present invention is further described below with reference to the drawings and specific embodiments of the specification:
example one
As shown in fig. 1 to 5, in a safety protection circuit of a mine cooling system, a positive electrode and a negative electrode of a 220V power supply are respectively connected with a pin C11 and a pin C18 of a line comprehensive protection device 1 through a miniature circuit breaker 10, and are used for supplying power to the line comprehensive protection device 1.
The remote control selection switch 11, the remote control closing button 14, a pin C14 of the integrated circuit protection device 1, a pin C12 of the integrated circuit protection device 1 and a closing coil 21 of the high-voltage circuit breaker are sequentially connected in series and then connected with a 220V power supply through the miniature circuit breaker 10.
The remote control selection switch 11, a first normally open contact 16 of a shutdown relay of the freezing pump, a pin C16 of the comprehensive circuit protection device 1, a pin C15 of the comprehensive circuit protection device 1, a high-voltage circuit breaker state switch 22 and a high-voltage circuit breaker opening coil 23 are sequentially connected in series and then connected with a 220V power supply through the miniature circuit breaker 10.
The line comprehensive protection device (1) is NSP788 in model, and is high in test precision, strong in anti-interference capability and reliable in protection action.
The high-voltage circuit breaker (2) is a 10kV high-voltage vacuum circuit breaker, the model is zw32-12/630a, the rated power frequency withstand voltage of the high-voltage vacuum circuit breaker can reach 42kV, the weight is light, and the mechanical life is long.
The refrigerating capacity of the refrigerating machine is 1 multiplied by 6MW, the refrigerating capacity of the two groups of electric refrigerating units is 2 multiplied by 6MW, and 3 refrigerating units are connected in parallel for operation. The two groups of electric refrigerating unit units are manufactured by York corporation, the model is YKQ2QRK35DHG, the power of a refrigerating motor of the model is 1328KW, the voltage grade is 10KV, the refrigerating capacity is large, the operation is stable and reliable, and the electric refrigerating unit is suitable for mines.
The near control selection switch 12, the near control closing button 13, a pin C14 of the integrated circuit protection device 1, a pin C13 of the integrated circuit protection device 1 and a closing coil 21 of the high-voltage circuit breaker are sequentially connected in series and then connected with a 220V power supply through the miniature circuit breaker 10.
The near control selection switch 12, the near control opening button 15, a pin C16 of the comprehensive circuit protection device 1, a pin C15 of the comprehensive circuit protection device 1, the high-voltage circuit breaker state switch 22 and the high-voltage circuit breaker opening coil 23 are sequentially connected in series and then connected with a 220V power supply through the miniature circuit breaker 10.
The quick-break over-temperature and over-voltage protection unit 17, a C17 pin of the comprehensive circuit protection device 1, a C15 pin of the comprehensive circuit protection device 1, a high-voltage circuit breaker state switch 22 and a high-voltage circuit breaker opening coil 23 are sequentially connected in series and then connected with a 220V power supply through a miniature circuit breaker 10; the quick-break overtemperature overvoltage protection unit 17 is used for quick break, overtemperature and CT overvoltage protection of a circuit.
The positive pole and the negative pole of the 220V power supply are connected with the locking unit 24 through the miniature circuit breaker 10, and when a circuit fault is detected, the locking unit 24 is used for locking the high-voltage circuit breaker 2 to prevent the high-voltage circuit breaker 2 from being closed in a fault state to cause an accident.
The second normally open contact 31 of the stop relay of the freezing pump is connected with the intermediate relay 32 in series and then connected with two ends of a DC24V power supply, the normally open contact 33 of the intermediate relay is connected with the alarm bell 34 in series and then connected with two ends of a DC24V power supply, and the second normally open contact 31 of the stop relay of the freezing pump is consistent with the first normally open contact 16 of the stop relay of the freezing pump in switching state.
1) Remote control starting of refrigerator
When the remote control selection switch 11 is switched on and the remote control closing button 14 is pressed, the closing coil 21 of the high-voltage circuit breaker is electrified, the high-voltage circuit breaker is closed, the refrigerator operates, and at the moment, the state switch 22 of the high-voltage circuit breaker is in a closed state.
2) Remote control stop for refrigerator
Close remote control option switch 11, when the freezer pump contactor normally open contact was closed, the refrigerator was shut down the coil and is got electric, and the refrigerator was shut down the normally open contact and is closed, and the output was shut down the relay coil and is got electric this moment, and the first normally open contact 16 of the shut down relay of freezer pump is closed this moment, and high voltage circuit breaker separating brake coil 23 gets electric, makes the high voltage circuit breaker trip to make the refrigerator shut down, high voltage circuit breaker state switch 22 was in the off-state this moment.
3) Near-controlled opening of refrigerator
When the close control selection switch 12 is switched on and the close control closing button 13 is pressed, the closing coil 21 of the high-voltage circuit breaker is electrified, the high-voltage circuit breaker is closed, the refrigerator operates, and at the moment, the state switch 22 of the high-voltage circuit breaker is in a closed state.
4) Closely controlled stop for refrigerator
When the close control selection switch 12 is closed and the close control opening button 15 is pressed, the opening coil 23 of the high-voltage circuit breaker is electrified, the high-voltage circuit breaker is tripped, the refrigerator is stopped, and at the moment, the state switch 22 of the high-voltage circuit breaker is in an open state.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; 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 technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (9)
1. A safety protection circuit of a mine cooling system is characterized by comprising a 220V power supply, a miniature circuit breaker (10), a line comprehensive protection device (1), a high-voltage circuit breaker (2), a refrigerator remote control circuit and a refrigerator near control circuit; the positive pole and the negative pole of the 220V power supply are connected with the comprehensive circuit protection device (1) through a miniature circuit breaker (10); the refrigerator remote control circuit comprises a remote control selection switch (11), a remote control closing button (14) and a first normally open contact (16) of a shutdown relay of a freezing pump, wherein the remote control selection switch (11), the remote control closing button (14), a line comprehensive protection device (1) and a high-voltage circuit breaker (2) are sequentially connected in series and then connected with a 220V power supply through a miniature circuit breaker (10); the remote control selection switch (11), a first normally open contact (16) of a shutdown relay of the freezing pump, the comprehensive circuit protection device (1) and the high-voltage circuit breaker (2) are sequentially connected in series and then connected with a 220V power supply through the miniature circuit breaker (10); the refrigerator near control circuit, the line comprehensive protection device (1) and the high-voltage circuit breaker (2) are sequentially connected in series and then connected with a 220V power supply through a miniature circuit breaker (10).
2. The mine cooling system safety protection circuit according to claim 1, characterized by further comprising an alarm circuit, wherein the alarm circuit comprises a DC24V power supply, a shutdown relay second normally open contact (31) of the freezing pump, an intermediate relay (32), an intermediate relay normally open contact (33) and an alarm electric bell (34), the shutdown relay second normally open contact (31) of the freezing pump is connected with the intermediate relay (32) in series and then connected to two ends of the DC24V power supply, and the intermediate relay normally open contact (33) is connected with the alarm electric bell (34) in series and then connected to two ends of the DC24V power supply.
3. The mine cooling system safety protection circuit according to claim 1, wherein the refrigerator proximity control circuit comprises a proximity control selection switch (12), a proximity control closing button (13) and a proximity control opening button (15); the near control selection switch (12), the near control closing button (13), the line comprehensive protection device (1) and the high-voltage circuit breaker (2) are sequentially connected in series and then connected with a 220V power supply through a miniature circuit breaker (10); the near-control selection switch (12), the near-control opening button (15), the line comprehensive protection device (1) and the high-voltage circuit breaker (2) are sequentially connected in series and then connected with a 220V power supply through the miniature circuit breaker (10).
4. The mine cooling system safety protection circuit according to claim 1, further comprising a quick-break over-temperature and over-voltage protection unit (17), wherein the quick-break over-temperature and over-voltage protection unit (17), the line comprehensive protection device (1) and the high-voltage circuit breaker (2) are sequentially connected in series and then connected with a 220V power supply through a miniature circuit breaker (10).
5. The mine cooling system safety protection circuit according to claim 1, characterized in that the high voltage circuit breaker (2) further comprises a locking unit (24), and the positive pole and the negative pole of the 220V power supply are connected with the locking unit (24) through a miniature circuit breaker (10).
6. The mine cooling system safety protection circuit according to claim 1, characterized in that the type of the line comprehensive protection device (1) is NSP 788.
7. The mine cooling system safety protection circuit according to claim 1, characterized in that the high voltage circuit breaker (2) is a 10kV high voltage vacuum circuit breaker, which is of type zw32-12/630 a.
8. The safety protection circuit of claim 1, wherein the refrigerating machines are two groups of electric refrigerating units, and the refrigerating capacity is not less than 2 x 6 MW.
9. The mine cooling system safety protection circuit of claim 1, wherein the refrigerator model is YKQ2QRK35 DHG.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021067441.0U CN212409148U (en) | 2020-06-11 | 2020-06-11 | Safety protection circuit of mine cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021067441.0U CN212409148U (en) | 2020-06-11 | 2020-06-11 | Safety protection circuit of mine cooling system |
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| Publication Number | Publication Date |
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| CN212409148U true CN212409148U (en) | 2021-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021067441.0U Active CN212409148U (en) | 2020-06-11 | 2020-06-11 | Safety protection circuit of mine cooling system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111536727A (en) * | 2020-06-11 | 2020-08-14 | 淮南矿业(集团)有限责任公司 | Safety protection circuit of mine cooling system and control method |
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2020
- 2020-06-11 CN CN202021067441.0U patent/CN212409148U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111536727A (en) * | 2020-06-11 | 2020-08-14 | 淮南矿业(集团)有限责任公司 | Safety protection circuit of mine cooling system and control method |
| CN111536727B (en) * | 2020-06-11 | 2023-12-26 | 淮南矿业(集团)有限责任公司 | Safety protection circuit of mine cooling system and control method |
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