CN220730946U - Explosion-proof electric cabinet of combustible gas alarm interlocking exhaust fan - Google Patents
Explosion-proof electric cabinet of combustible gas alarm interlocking exhaust fan Download PDFInfo
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- CN220730946U CN220730946U CN202321995376.1U CN202321995376U CN220730946U CN 220730946 U CN220730946 U CN 220730946U CN 202321995376 U CN202321995376 U CN 202321995376U CN 220730946 U CN220730946 U CN 220730946U
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- electric cabinet
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- 238000012544 monitoring process Methods 0.000 claims abstract description 25
- 238000001514 detection method Methods 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Abstract
The utility model provides an explosion-proof electric cabinet of a combustible gas alarm interlocking exhaust fan, which comprises an explosion-proof electric cabinet, wherein a fan power supply circuit, a monitoring signal feedback circuit and a trigger locking circuit are arranged in the explosion-proof electric cabinet, a fan power supply cable wiring terminal and a fan wiring terminal are arranged at two ends of the fan power supply circuit, a contactor is arranged between the fan power supply cable wiring terminal and the fan wiring terminal, the contactor is controlled by the monitoring signal feedback circuit, the monitoring signal feedback circuit is connected with the trigger locking circuit, and locking of a set time after triggering of an intermediate relay arranged on the monitoring signal feedback circuit is realized. The utility model has the beneficial effect of solving the problem that the intermediate relay at the input end frequently acts due to signal fluctuation of the exhaust fan. The standby triggering structure is arranged, so that the normal operation can be kept under the circumstance that part of the circuit is damaged. The explosion-proof box shell is adjusted, the explosion-proof cavity and the safety-increasing cavity are arranged, and the installation difficulty is reduced on the premise of meeting the use standard, so that the explosion-proof box is suitable for popularization and use.
Description
Technical Field
The utility model relates to the field of explosion-proof electric control appliances, in particular to an explosion-proof electric control box of a flammable gas alarm interlocking exhaust fan.
Background
The combustible gas alarming explosion-proof electric cabinet is used for receiving the electric signal sent by the detecting instrument and sending out an alarm to control the exhaust fan to work. The existing explosion-proof electric cabinet has the following problems:
1. the prior explosion-proof electric cabinet causes frequent actions of the intermediate relay at the input end due to fluctuation of the flammable gas alarm near the alarm value, so that the exhaust fan is repeatedly started in a short time, and the exhaust fan is damaged.
2. The existing explosion-proof electric cabinet control circuit is simpler, the situation that the exhaust fan cannot be started easily occurs when the explosion-proof electric cabinet control circuit breaks down, and potential safety hazards are increased.
3. The existing explosion-proof electric cabinet adopts an integral explosion-proof structural standard, so that great difficulty exists in installation, and the installation and maintenance are not facilitated.
Disclosure of Invention
The utility model overcomes the defects in the prior art and provides the explosion-proof electric cabinet of the flammable gas alarm interlocking exhaust fan.
The aim of the utility model is achieved by the following technical scheme.
The utility model provides a flammable gas reports to police and interlocks explosion-proof electric cabinet of exhaust fan, including explosion-proof electric cabinet, be equipped with fan power supply circuit, monitoring signal feedback circuit and trigger locking circuit in the explosion-proof electric cabinet, fan power supply circuit both ends are equipped with fan power supply cable binding post and fan binding post, be equipped with the contactor between fan power supply cable binding post and the fan binding post, the contactor passes through monitoring signal feedback circuit control, monitoring signal feedback circuit is connected with trigger locking circuit, carry out the locking of settlement time after the intermediate relay that sets up on the realization monitoring signal feedback circuit triggers.
The fan power supply circuit comprises a fan power supply cable wiring terminal, a breaker QF1, a first auxiliary contact of a contactor KM1 and a fan wiring terminal, wherein the fan power supply cable wiring terminal is sequentially connected with the breaker QF1, the first auxiliary contact of the contactor KM1 and the fan wiring terminal in series, and a circuit between the breaker QF1 and the first auxiliary contact of the contactor KM1 is connected with the monitoring signal feedback circuit.
And the fan power supply cable wiring terminal and the fan wiring terminal are connected in parallel and provided with a breaker QF2.
The monitoring signal feedback circuit comprises a direct-current stabilized power supply, an intermediate relay KA2, an intermediate relay KA1 and an instrument wiring terminal, wherein an alternating-current end of the direct-current stabilized power supply is respectively connected with the fan power supply circuit and the trigger locking circuit, and the direct-current end of the direct-current stabilized power supply is sequentially connected with a second auxiliary contact of the contactor KM1, an auxiliary contact of the intermediate relay KA2, a coil part of the intermediate relay KA1 and the instrument wiring terminal in series.
And a fuse is arranged on a circuit for connecting the direct-current stabilized power supply with the fan power supply circuit.
The trigger locking circuit comprises an auxiliary contact of an intermediate relay KA1, a time relay KT1, a contactor KM1, an intermediate relay KA2, an indicator lamp HL1, an indicator lamp HL2, a third auxiliary contact of the contactor KM1 and an auxiliary contact of the intermediate relay KA2, wherein the auxiliary contact of the signal detection intermediate relay KA1 is connected with a trigger input end of the time relay KT1 in series, and a delay disconnection output contact of the time relay KT1 is connected with a coil part of the contactor KM1, a coil part of the intermediate relay KA2 and the indicator lamp HL2 in series;
the fan power supply circuit supplies power to an alternating current power supply, the alternating current power supply is sequentially connected with a direct current stabilized power supply input end, a time relay KT1 power supply end, a power supply indicating circuit and a locking and holding circuit in parallel through a fuse, a contactor KM1 normally-closed contact is connected in series between the alternating current power supply and a power supply indicating lamp HL1, and the power supply indicating lamp HL1 is shared by power supply indication and stop indication.
The explosion-proof electric cabinet is internally provided with an explosion-proof cavity and an increased safety cavity, the fan power supply circuit, the monitoring signal feedback circuit and the electric elements of the trigger locking circuit are arranged in the explosion-proof cavity, and the indicator lamp HL1, the indicator lamp HL2 and the wiring terminal are arranged in the increased safety cavity.
The connecting wire harness between the explosion-proof cavity and the safety-increasing cavity is sealed through resin pouring.
The circuit breaker QF1 and the circuit breaker QF2 are controlled by adopting a knob, and the knob is arranged on the outer wall of the explosion-proof electric cabinet.
The beneficial effects of the utility model are as follows: the trigger locking circuit is arranged, so that the frequent action of the intermediate relay at the input end caused by signal fluctuation of the exhaust fan is avoided, and the damage of the exhaust fan is avoided. On the basis, the control circuit is optimized, a standby trigger structure is arranged, double insurance is carried out, and normal operation can be kept under the circumstance that part of the circuit is damaged. Meanwhile, the explosion-proof box shell is adjusted, the explosion-proof cavity and the safety-increasing cavity are arranged separately, and the installation difficulty is reduced on the premise of meeting the use standard, so that the explosion-proof box is suitable for popularization and use.
Drawings
FIG. 1 is a circuit diagram of the present utility model;
FIG. 2 is a schematic diagram of the structure of an explosion-proof electric cabinet;
in the figure: 1. an explosion-proof electric control box; 2. an explosion-proof cavity; 3. and the safety-increasing cavity.
Detailed Description
The technical scheme of the utility model is further described by specific examples.
Example 1
The utility model provides a combustible gas reports to police interlocking exhaust fan explosion-proof electric cabinet 1, including explosion-proof electric cabinet 1, be equipped with fan power supply circuit, monitoring signal feedback circuit and trigger locking circuit in the explosion-proof electric cabinet 1, fan power supply circuit both ends are equipped with fan power supply cable binding post and fan binding post, be equipped with the contactor between fan power supply cable binding post and the fan binding post, the contactor passes through monitoring signal feedback circuit control, monitoring signal feedback circuit is connected with trigger locking circuit, carry out the locking of settlement time after the intermediate relay that sets up on the realization monitoring signal feedback circuit triggers.
The fan power supply circuit comprises a fan power supply cable wiring terminal, a breaker QF1, a first auxiliary contact of a contactor KM1 and a fan wiring terminal, wherein the fan power supply cable wiring terminal is sequentially connected with the breaker QF1, the first auxiliary contact of the contactor KM1 and the fan wiring terminal in series, and a circuit between the breaker QF1 and the first auxiliary contact of the contactor KM1 is connected with a monitoring signal feedback circuit.
The monitoring signal feedback circuit comprises a direct-current stabilized power supply, an intermediate relay KA2, an intermediate relay KA1 and an instrument wiring terminal, wherein an alternating-current end of the direct-current stabilized power supply is respectively connected with the fan power supply circuit and the trigger locking circuit, and the direct-current end of the direct-current stabilized power supply is sequentially connected with a second auxiliary contact of the contactor KM1, an auxiliary contact of the intermediate relay KA2, a coil part of the intermediate relay KA1 and the instrument wiring terminal in series.
The trigger locking circuit comprises an auxiliary contact of an intermediate relay KA1, a time relay KT1, a contactor KM1, an intermediate relay KA2, an indicator lamp HL1, an indicator lamp HL2, a third auxiliary contact of the contactor KM1 and an auxiliary contact of the intermediate relay KA2, wherein the auxiliary contact of the signal detection intermediate relay KA1 is connected with a trigger input end of the time relay KT1 in series, and a delay disconnection output contact of the time relay KT1 is connected with a coil part of the contactor KM1, a coil part of the intermediate relay KA2 and the indicator lamp HL2 in series;
the fan power supply circuit supplies power to an alternating current power supply, the alternating current power supply is sequentially connected with a direct current stabilized power supply input end, a time relay KT1 power end, a power indication circuit and a locking and holding circuit in parallel through a fuse, a normally closed contact of a contactor KM1 is connected in series between the alternating current power supply and a power indication lamp HL1, and the power indication lamp HL1 is shared by the power indication and the stop indication.
As shown in fig. 1, a fan power supply cable wiring terminal and a fan wiring terminal are respectively connected with corresponding elements to realize a power supply circuit of an exhaust fan, a breaker QF1 and a contactor KM1 first auxiliary contact are arranged on the section of circuit in series and used for controlling whether the power supply circuit of the exhaust fan is closed, the normal use interrupt circuit QF1 is in a closed state, the contactor KM1 first auxiliary contact keeps in a normally open state, when an electric signal of an instrument wiring terminal is received by an intermediate relay KA1, a coil of the intermediate relay KA1 is attracted, the corresponding contactor KA1 is changed into a closed state from the normally open state, a coil part of the time relay KT1 is electrified, the time relay KT1 delays to open and output the contact to be closed, at the moment, the intermediate relay KM1 is electrified with an indicator lamp HL2, the coil of the intermediate relay KM1 is electrified to attract and control the contactor KM1 first auxiliary contact to reversely work, and the power supply circuit of the fan power supply cable wiring terminal and the fan wiring terminal is communicated to realize starting of the exhaust fan; the auxiliary contact of the intermediate relay KA2 reversely works from a normally closed state to an open state to stop the intermediate relay KA1 from reacting to the instrument wiring terminal, so as to realize a locking function; the reverse operation of the third auxiliary contact of the contactor KM1 is changed from a normally closed state to an open state, the indicator lamp HL1 is powered off, and the indicator lamp HL2 is lighted.
Wherein the setting time of the time relay KT1 is adjusted between 0.05s and 300 hours, and 20 minutes is more preferable. In order to prevent the failure of the breaker QF1 and the incapability of starting the exhaust fan, a breaker QF2 is additionally arranged to forcedly start the exhaust fan.
Example two
On the basis of the first embodiment, a standby trigger circuit structure is added. The two ends of the contact KM1 are parallelly connected with an intermediate relay KA2 contact, and the two ends of the coil part of the contact KM1 and the indicator lamp HL2 are parallelly connected with an intermediate relay KA2 coil part.
In order to avoid the problem that the monitoring signal feedback circuit cannot operate due to faults of the second contactor KM1, an intermediate relay KA2 is additionally arranged, when the faults of the second contactor KM1 cannot be switched on, work can be completed through a branch of the intermediate relay KA2, and in the locking process, the contactor KA2 is controlled to be opened through the electric attraction of the intermediate relay KA2, so that the locking function is completed.
Example III
On the basis of the first embodiment and the second embodiment, the explosion-proof electric cabinet is divided into an explosion-proof cavity and an safety-increasing cavity, and important elements are arranged in the explosion-proof cavity to adapt to dangerous environments of an explosive gas environment I area and below, wherein the stop indicator lamp, the running indicator lamp and the wiring terminal are arranged in the safety-increasing An Qiang body, so that the installation burden is reduced.
The foregoing describes the embodiments of the present utility model in detail, but the description is only a preferred embodiment of the present utility model and should not be construed as limiting the scope of the utility model. All equivalent changes and modifications within the scope of the present utility model are intended to be covered by the present utility model.
Claims (9)
1. The utility model provides a combustible gas reports to police and interlocks explosion-proof electric cabinet of exhaust fan which characterized in that: including explosion-proof electric cabinet, be equipped with fan power supply circuit, monitoring signal feedback circuit and trigger locking circuit in the explosion-proof electric cabinet, fan power supply circuit both ends are equipped with fan power supply cable binding post and fan binding post, are equipped with the contactor between fan power supply cable binding post and the fan binding post, and the contactor passes through monitoring signal feedback circuit control, and monitoring signal feedback circuit is connected with trigger locking circuit, carries out the locking of settlement time after realizing the intermediate relay that sets up on the monitoring signal feedback circuit triggers.
2. The combustible gas alarm interlocking exhaust fan explosion-proof electric cabinet according to claim 1, wherein: the fan power supply circuit comprises a fan power supply cable wiring terminal, a breaker QF1, a first auxiliary contact of a contactor KM1 and a fan wiring terminal, wherein the fan power supply cable wiring terminal is sequentially connected with the breaker QF1, the first auxiliary contact of the contactor KM1 and the fan wiring terminal in series, and a circuit between the breaker QF1 and the first auxiliary contact of the contactor KM1 is connected with the monitoring signal feedback circuit.
3. The combustible gas alarm interlocking exhaust fan explosion-proof electric cabinet according to claim 2, wherein: and the fan power supply cable wiring terminal and the fan wiring terminal are connected in parallel and provided with a breaker QF2.
4. The combustible gas alarm interlocking exhaust fan explosion-proof electric cabinet according to claim 2, wherein: the monitoring signal feedback circuit comprises a direct-current stabilized power supply, an intermediate relay KA2, an intermediate relay KA1 and an instrument wiring terminal, wherein an alternating-current end of the direct-current stabilized power supply is respectively connected with the fan power supply circuit and the trigger locking circuit, and the direct-current end of the direct-current stabilized power supply is sequentially connected with a second auxiliary contact of the contactor KM1, an auxiliary contact of the intermediate relay KA2, a coil part of the intermediate relay KA1 and the instrument wiring terminal in series.
5. The combustible gas alarm interlocking exhaust fan explosion-proof electric cabinet of claim 4, wherein: and a fuse is arranged on a circuit for connecting the direct-current stabilized power supply with the fan power supply circuit.
6. The combustible gas alarm interlocking exhaust fan explosion-proof electric cabinet of claim 5, wherein: the trigger locking circuit comprises an auxiliary contact of an intermediate relay KA1, a time relay KT1, a contactor KM1, an intermediate relay KA2, an indicator lamp HL1, an indicator lamp HL2, a third auxiliary contact of the contactor KM1 and an auxiliary contact of the intermediate relay KA2, wherein the auxiliary contact of the signal detection intermediate relay KA1 is connected with a trigger input end of the time relay KT1 in series, and a delay disconnection output contact of the time relay KT1 is connected with a coil part of the contactor KM1, a coil part of the intermediate relay KA2 and the indicator lamp HL2 in series;
the fan power supply circuit supplies power to an alternating current power supply, the alternating current power supply is sequentially connected with a direct current stabilized power supply input end, a time relay KT1 power supply end, a power supply indicating circuit and a locking and holding circuit in parallel through a fuse, a contactor KM1 normally-closed contact is connected in series between the alternating current power supply and a power supply indicating lamp HL1, and the power supply indicating lamp HL1 is shared by power supply indication and stop indication.
7. The combustible gas alarm interlocking exhaust fan explosion-proof electric cabinet of claim 6, wherein: the explosion-proof electric cabinet is internally provided with an explosion-proof cavity and an increased safety cavity, the fan power supply circuit, the monitoring signal feedback circuit and the electric elements of the trigger locking circuit are arranged in the explosion-proof cavity, and the indicator lamp HL1, the indicator lamp HL2 and the wiring terminal are arranged in the increased safety cavity.
8. The combustible gas alarm interlocking exhaust fan explosion-proof electric cabinet of claim 7, wherein: the connecting wire harness between the explosion-proof cavity and the safety-increasing cavity is sealed through resin pouring.
9. The combustible gas alarm interlocking exhaust fan explosion-proof electric cabinet of claim 7, wherein: the circuit breaker QF1 and the circuit breaker QF2 are controlled by adopting a knob, and the knob is arranged on the outer wall of the explosion-proof electric cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321995376.1U CN220730946U (en) | 2023-07-27 | 2023-07-27 | Explosion-proof electric cabinet of combustible gas alarm interlocking exhaust fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321995376.1U CN220730946U (en) | 2023-07-27 | 2023-07-27 | Explosion-proof electric cabinet of combustible gas alarm interlocking exhaust fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220730946U true CN220730946U (en) | 2024-04-05 |
Family
ID=90526384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321995376.1U Active CN220730946U (en) | 2023-07-27 | 2023-07-27 | Explosion-proof electric cabinet of combustible gas alarm interlocking exhaust fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220730946U (en) |
-
2023
- 2023-07-27 CN CN202321995376.1U patent/CN220730946U/en active Active
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