CN219107055U - Feed abnormity control system caused by high-low voltage protection - Google Patents
Feed abnormity control system caused by high-low voltage protection Download PDFInfo
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- CN219107055U CN219107055U CN202223531753.4U CN202223531753U CN219107055U CN 219107055 U CN219107055 U CN 219107055U CN 202223531753 U CN202223531753 U CN 202223531753U CN 219107055 U CN219107055 U CN 219107055U
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Abstract
The utility model provides a feed abnormity control system caused by high-low voltage protection, which effectively solves the problem that the reliable brake separation phenomenon cannot be completed when a comprehensive protector fails, and the underground coal mine safety production is seriously influenced. The utility model comprises a high-low voltage feed switch, the early warning system comprises a direct current power supply, a comprehensive protector ZB, a time relay SJ, a gas power-off instrument and a gas monitoring and controlling system, wherein the comprehensive protector ZB comprises an internal relay J, the time relay SJ comprises three groups of contacts which are respectively a normally open contact SJ-1 which is closed in a prompt mode, a normally closed contact SJ-2 which is closed in a delayed mode and a normally open contact SJ-3 which is opened in a delayed mode, and the gas power-off instrument controls the direct current power supply to supply power for the time relay SJ, so that the reliability of switching-off is improved, and the safety of underground production of a coal mine is also improved.
Description
Technical Field
The utility model relates to the field of coal mine electrical equipment, in particular to a feed abnormity control system caused by high-low voltage protection.
Background
In order to ensure the production safety of mines, a high-low voltage feed switch used in the underground of the coal mine is usually used as a main switch for local power supply, so that a gas monitoring and controlling system in the underground of the coal mine is used in combination with the high-low voltage feed switch, and when the local gas concentration in the underground of the coal mine exceeds a specified value, the monitoring and controlling system sends a power-off command to the specified high-low voltage feed switch, so that a gas power-off instrument cuts off a non-intrinsically safe power supply in a controlled range. At present, because the underground monitoring and monitoring system of the coal mine has a plurality of links and complicated circuits which need to be controlled when the control scheme of the gas overrun power failure is executed, the phenomenon of refusal of the high-low voltage feed switch is caused, therefore, the installation of the comprehensive protection device for the high-low voltage feed switch is a mode for ensuring the action of the high-low voltage feed switch, and a regular test method is usually adopted for timely finding out faults and eliminating the faults in advance.
The reliable power failure after the failure becomes the old and difficult problem to be solved currently urgently, and after local gas exceeds the limit, the power failure signal sent by the monitoring and control system directly provides information for the comprehensive protector, but the reality that the high and low voltage feed switch refuses to operate once the comprehensive protector fails is not considered, the reliable brake separation cannot be carried out, very serious consequences are brought, and serious influence is caused to underground coal mine safety production.
The present utility model thus provides a new solution to this problem.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model aims to provide a feed abnormity control system caused by high-low voltage protection, which effectively solves the problem that the reliable brake separation of a comprehensive protector cannot be completed when the comprehensive protector fails and seriously affects the underground coal mine safety production.
The technical scheme is that the feeding abnormity control system caused by high-low voltage protection comprises a high-low voltage feeding switch, wherein the early warning system comprises a direct-current power supply, a comprehensive protector ZB, a time relay SJ, a gas outage instrument and a gas monitoring and controlling system, the comprehensive protector ZB comprises an internal relay J, the time relay SJ comprises three groups of contacts which are respectively a normally open contact SJ-1 which is closed in a snap manner, a normally closed contact SJ-2 which is closed in a delay manner and a normally open contact SJ-3 which is opened in a delay manner;
and the gas outage instrument controls the power supply of the direct current power supply.
Further, the gas monitoring system detects the gas concentration in the coal mine well, and outputs three groups of gas concentration out-of-limit power-off signals when judging that the gas is out-of-limit, and the comprehensive protector ZB and the time relay SJ control the states of the high-low voltage feed switch.
Further, the direct current power supplies are respectively used for supplying power to an under-voltage coil QY of the high-low voltage feed switch, a switching-off coil FZ of the high-low voltage feed switch and a time relay SJ.
Further, the states of the high-low voltage feed switch comprise closing and tripping.
Further, the gas outage instrument comprises a normally open contact K, and the normally open contact K is used for controlling a direct current power supply to supply power for the time relay SJ.
Further, the set of gas concentration overrun power-off signals are directly output to the comprehensive protector ZB.
Further, the other two groups of gas concentration overrun cut-off electric signals enable the normally closed contact SJ-2 which is closed by time delay of the time relay SJ to act with the normally open contact SJ-3 which is opened by time delay.
The utility model has the following beneficial effects:
by means of the time relay arranged by the control system, three groups of contacts, namely a normally open contact SJ-1 which is closed in a snap mode, a normally closed contact SJ-2 which is closed in a delay mode and a contact SJ-3 which is opened in a delay mode, are arranged on the time relay, under the action of a gas monitoring and controlling system, a comprehensive protector ZB and an internal relay J, tripping of a high-low voltage feed switch can be achieved even if the comprehensive protector ZB breaks down, and therefore the problem that the comprehensive protector cannot realize breaking off when in a fault and serious influence is caused on coal mine underground safety production is avoided, breaking off reliability is improved, and safety in coal mine underground production is also improved.
Drawings
FIG. 1 is a schematic diagram of a system according to the present utility model.
Detailed Description
The foregoing and other features, aspects and advantages of the present utility model will become more apparent from the following detailed description of the embodiments, which proceeds with reference to the accompanying fig. 1. The following embodiments are described in detail with reference to the drawings.
Exemplary embodiments of the present utility model will be described below with reference to the accompanying drawings.
The early warning system comprises a direct current power supply, a comprehensive protector ZB, a time relay SJ, a gas outage instrument and a gas monitoring and controlling system, wherein the comprehensive protector ZB comprises an internal relay J, the time relay SJ comprises three groups of contacts which are respectively a normally open contact SJ-1 which is closed in a transient mode, a normally closed contact SJ-2 which is closed in a delayed mode and a normally open contact SJ-3 which is opened in a delayed mode, the gas monitoring and controlling system detects the concentration of underground local gas of a coal mine and outputs three groups of gas concentration overrun outage signals when judging that the gas exceeds the limit, one group of gas concentration overrun outage signals are directly output to the comprehensive protector ZB through the closed normally open contact SJ-1, the comprehensive protector ZB enables the internal relay J to act, the contact J-1 of the internal relay J turns on the power supply of a switching-off coil FZ of a high-low voltage feed switch to trip the high-low voltage feed switch, the comprehensive protector ZB comprises the internal relay J, and the time relay SJ is selected to obtain the electric delay relay;
the other group of gas concentration overrun power-off signals enable normally open contacts SJ-2 to be closed in a delayed mode, and after the time delay, the power supply of a switching-off coil FZ of the high-low voltage feed switch is directly connected, so that the high-low voltage feed switch is tripped;
the third group of gas concentration overrun power-off signals enable the contact SJ-3 to be opened in a delayed mode, the power supply of the undervoltage coil QY of the high-low voltage feed switch is opened in a delayed mode, and the high-low voltage feed switch is tripped.
The direct current power supply is respectively used for supplying power to an under-voltage coil QY of the high-low voltage feed switch, a switching-off coil FZ of the high-low voltage feed switch and a time relay SJ, and the time relay SJ can also receive the power supply of the alternating current power supply, and the direct current power supply comprises two terminals L+ and L-.
The gas outage instrument comprises a normally open contact K, when the gas monitoring system detects that local gas in a coal mine is not out of limit, the normally open contact K is in a closed state, a time relay SJ is powered on, three pairs of contacts SJ-1, SJ-2 and SJ-3 of the time relay SJ are not kept in original states, namely the normally open contact SJ-1 is instantaneously closed, the normally closed contact SJ-2 is in a delayed open state, the normally open contact SJ-3 is in a delayed closed state, so that an undervoltage coil QY of a high-low voltage feed switch is powered on, and the high-low voltage feed switch is in a state of keeping original closing operation.
When judging that underground coal mine gas exceeds the limit, the gas monitoring system outputs three groups of gas concentration overrun power-off signals, a normally open contact K of a gas power-off instrument is opened, a time relay SJ cannot obtain a power supply supplied by a direct current power supply, the time relay SJ enables a normally open contact SJ-1 to be opened instantaneously and a normally closed contact SJ-2 to be closed in a delayed manner, a normally open contact SJ-3 is opened in a delayed manner, a trip signal is output by a comprehensive protector ZB at the moment after the time relay SJ is powered off, the power supply built in the trip signal is used for supplying power to an internal relay J, and the normally open contact J1-1 of the internal relay J is closed to be connected with a power supply of a switching-off coil FZ, so that a high-low voltage feed switch trips;
in addition, the normally closed contact SJ-2 of the time relay SJ is closed after a period of time delay, the breaking coil FZ power supply is turned on, the normally open contact SJ-3 in the opposite state is in a delayed action to break the undervoltage coil QY power supply, and the high and low voltage feed switch is tripped under the common (independently tripping) action of the normally closed contact SJ-2, wherein the time delay can be set by itself, such as 1-3s;
under the normal condition of the comprehensive protector ZB, when the gas concentration emitted by the gas monitoring and controlling system exceeds the limit, the gas power-off instrument cuts off the power supply of the time relay SJ, the normally open contact SJ-1 of the time relay SJ is instantaneously cut off, the comprehensive protector ZB outputs a tripping signal, the tripping signal enables the internal relay J of the comprehensive protector ZB to immediately act, the power supply of the switching-off coil FZ of the high-low voltage feed switch is switched on, and the power supply of the undervoltage coil QY is switched off, so that the high-low voltage feed switch trips.
When the comprehensive protector ZB breaks down and the monitoring system sends out a gas concentration overrun outage signal after gas overrun, the normally open contact K of the gas outage instrument is disconnected, the time relay SJ cannot obtain the power supply of the direct-current power supply, the normally open contact SJ-1 is instantaneously disconnected, the comprehensive protector ZB cannot output a tripping signal at the moment, the internal relay J cannot be operated due to the fault of the comprehensive protector ZB, the power supply of the split gate coil FZ cannot be connected and the power supply of the undervoltage coil QY cannot be disconnected, the high-low voltage feed switch cannot trip, but at the moment, the normally open contact SJ-2 of the time relay SJ is in delayed connection, the power supply of the split gate coil FZ of the high-low voltage feed switch is directly connected, meanwhile, the contact SJ-3 is in delayed connection, the power supply of the undervoltage coil QY is cut off, the normally open contact SJ-3 is in delayed connection, and the high-low voltage feed switch trips, namely the normally closed contact SJ-2 and the normally open contact SJ-3 which are in delayed connection are in the time when the comprehensive protector ZB cannot complete tripping.
When the utility model is used, the high-low voltage feed switch used is a common explosion-proof vacuum feed switch used in underground coal mine, the time relay SJ is a power-on delay relay of GRT8-At, the voltage range is wide (12V-240V voltage is optional), the AC/DC (AC/DC) is universal, the time relay SJ2 has the advantages that two pairs of instantaneous contacts, namely 11 pins are public terminals, 12 pins are normally closed leading-out terminals, 14 pins are normally open leading-out terminals, and secondly, three pairs of contacts with adjustable action delay, namely 15 pins are public terminals, 16 pins are normally closed terminals with delay cut-off, 18 pins are normally open terminals with delay cut-off, namely 11 pins and 14 pins used in the scheme, the delay action uses 15 pins and 16 pins, the terminals A1 and A2 are power pins of the time relay SJ, are connected to two ends of a 24VDC direct current power supply, wherein the positive electrode of the A2 is connected with the positive electrode of the power supply, the negative electrode of the gas cut-off instrument is controlled by a gas cut-off instrument, and the normally closed coil is normally closed when the gas cut-off instrument is not powered on, and the normally closed by the normally open contact is normally closed, and the normally closed coil is normally closed, and the normally open contact is opened when the normally closed, and the normally closed contact is opened, and the normally closed when the normally closed and the normally closed contact is opened, and the normally closed is opened; once the normally open contact K of the gas concentration overrun gas outage instrument is powered off, the time relay SJ is powered off, the normally open contact 11 pin and the normally open contact 14 pin which are instantaneously closed of the time relay SJ are powered off to disconnect the pins 15 and 18 of the comprehensive protector, a gas concentration overrun outage signal is input, if the comprehensive protector ZB works normally at the moment, a tripping signal is sent out by the comprehensive protector ZB and then tripping is carried out, meanwhile, the normally closed contact 15 pin and the normally closed contact 16 pin SJ2-2 are delayed to be connected with the power supply of the switching-off coil FZ, and in addition, the normally open contact SJ-3 is delayed to be powered off the power supply of the undervoltage coil QY, so that the switching-off coil FZ does not directly drive the high-low voltage feed switch to trip through the protection device.
The utility model has the following beneficial effects:
(1) By means of the time relay arranged in the control system, three groups of contacts, namely a normally open contact SJ-1 which is closed in a snap manner, a normally closed contact SJ-2 which is closed in a delay manner and a contact SJ-3 which is opened in a delay manner, are arranged on the time relay, under the action of a gas monitoring and controlling system, an internal relay J and a comprehensive protector ZB, even if the comprehensive protector ZB breaks down, the high-low voltage feed switch can trip, so that the problem that the comprehensive protector cannot realize brake separation when the comprehensive protector breaks down and serious influence is caused on underground coal mine safety production is avoided, the brake separation reliability is improved, and the safety in underground coal mine production is also improved;
(2) Under the mutually matched action of three groups of contacts of the time relay SJ and the comprehensive protector, which are arranged by the control system, the high-low voltage feed switch is switched off by the driving under-voltage coil QY and the switching-off coil FZ, so that reliable action can be ensured after local gas overruns, and the safety operation under the coal mine is improved.
Claims (7)
1. The feed abnormality control system caused by high-low voltage protection comprises a high-low voltage feed switch and is characterized by comprising a direct-current power supply, a comprehensive protector ZB, a time relay SJ, a gas outage instrument and a gas monitoring and controlling system, wherein the comprehensive protector ZB comprises an internal relay J, and the time relay SJ comprises three groups of contacts which are respectively a normally open contact SJ-1 which is closed in a snap manner, a normally closed contact SJ-2 which is closed in a delay manner and a normally open contact SJ-3 which is opened in a delay manner;
and the gas outage instrument controls the power supply of the direct current power supply.
2. The abnormal feed control system caused by high and low voltage protection according to claim 1, wherein the gas monitoring system detects the gas concentration in the coal mine well and outputs three groups of gas concentration overrun power-off signals when judging that the gas exceeds the limit, and the comprehensive protector ZB and the time relay SJ control the state of the high and low voltage feed switch.
3. The abnormal feed control system caused by high and low voltage protection according to claim 1, wherein the direct current power supply supplies power to an under-voltage coil QY of the high and low voltage feed switch, a switching-off coil FZ of the high and low voltage feed switch and a time relay SJ respectively.
4. The abnormal feed control system caused by high and low voltage protection according to claim 1, wherein the state of the high and low voltage feed switch comprises closing and tripping.
5. The abnormal feed control system caused by high and low voltage protection according to claim 1, wherein the gas power-off instrument comprises a normally open contact K, and the normally open contact K is used for controlling a direct current power supply to supply power for the time relay SJ.
6. The abnormal feed control system caused by high and low voltage protection according to claim 2, wherein the set of gas concentration overrun power-off signals are directly output to the comprehensive protector ZB.
7. The abnormal feed control system caused by high and low voltage protection according to claim 2, wherein the other two groups of gas concentration overrun cut-off electric signals enable the normally closed contact SJ-2 which is closed by time delay and the normally open contact SJ-3 which is opened by time delay of the time relay SJ to act.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223531753.4U CN219107055U (en) | 2022-12-29 | 2022-12-29 | Feed abnormity control system caused by high-low voltage protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223531753.4U CN219107055U (en) | 2022-12-29 | 2022-12-29 | Feed abnormity control system caused by high-low voltage protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219107055U true CN219107055U (en) | 2023-05-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223531753.4U Active CN219107055U (en) | 2022-12-29 | 2022-12-29 | Feed abnormity control system caused by high-low voltage protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219107055U (en) |
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- 2022-12-29 CN CN202223531753.4U patent/CN219107055U/en active Active
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