CN203416152U - Quick discharging and indicating device for explosion-proof frequency converter for mines - Google Patents
Quick discharging and indicating device for explosion-proof frequency converter for mines Download PDFInfo
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- CN203416152U CN203416152U CN201320358965.9U CN201320358965U CN203416152U CN 203416152 U CN203416152 U CN 203416152U CN 201320358965 U CN201320358965 U CN 201320358965U CN 203416152 U CN203416152 U CN 203416152U
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Abstract
The utility model relates to a quick discharging and indicating device for an explosion-proof frequency converter for mines. The quick discharging and indicating device is characterized by comprising a circuit and a resistor cooling device; the circuit comprises a vacuum relay K, a discharging resistor R1, an optocoupler relay loop, a capacitance-resistance absorbing loop, a reverse clamping circuit and a light-emitting diode circuit; one terminal of a normally-closed contact of the vacuum relay K is connected to a positive electrode of a capacitor C of the explosion-proof frequency converter, and the other terminal of the normally-closed contact is connected with the discharging resistor R1; and the optocoupler relay loop, a reverse clamping diode, the capacitance-resistance absorbing loop and the light-emitting diode circuit are connected between the other terminal of a resistor R1 of a discharging optocoupler relay U and a negative electrode of the capacitor of the explosion-proof frequency converter in parallel. The temperature of the discharging resistor is moderate and stable under the action of a cold plate, energy in the capacitor can be released to be within the safety standard in 15 minutes, the current capacitor residual energy is indicated to users during operation, signals are fed back to a controller in a device, and judgment data can be provided for other operations according to current discharging conditions of the capacitor.
Description
Technical field
This device relates to for there being the explosion-proof frequency converter of coal dust and explosive gas atmosphere under coal mine, and particularly a kind of repid discharge of explosion-isolating mine frequency converter and indicating device, for discharging fast and indicating the energy in the large electric capacity of its accumulator.
Background technology
Under coal mine, frequency converter used is high-power flame proof special converter, and wherein, filter is a large bulk capacitance, at equipment, after out of service and power-off, still stores energy in electric capacity, must discharge the energy storing in electric capacity by electric discharge device.
At present, the basic principle of general electric discharge device is that the two ends (being the two ends of DC bus) of using a resistance to be connected in parallel on electric capacity form RC discharge circuit, after power-off, discharge lentamente electric energy, RC discharge circuit is passive circuit, input signal is zero, be the zero input response of RC circuit, voltage closes over time and is:
In formula (1)
u c for the voltage at electric capacity two ends,
u 0 for the initial voltage at electric capacity two ends,
r,
cbe respectively resistance value and capacitance.Hence one can see that, and voltage is decayed exponentially, can carry out the controlled discharge time by the method for adjusting resistance value.
But existing like product cannot be indicated and signal feedback discharge process on market, user cannot grasp the implementation status of discharge process in real time, easily causes security incident when maintenance; And the heat that in discharge process, discharge resistance produces is larger, to itself and other components and parts, can cause harmful effect.
Simultaneously, GB GB 3836.1-2010 < < explosive atmosphere first: Device-General requires to stipulate in > >, the I class electric equipment (for the electric equipment of coal mine gas gas environment) of interior capacitor, when charging voltage is 200V or when above, to be longer than dump energy discharge time to the time of 0.2mJ.The supply power voltage of mineral electrical apparatus is generally 1140V and 3300V, and charging voltage is larger, and discharge time is longer.When system because a variety of causes breaks down, need to uncap inspection, while safeguarding, in order to ensure safety and to save time, need to discharge fast the energy storing on capacitor and indicate its current electriferous state, be controlled within 15 minutes.For above-mentioned reasons, actual production and maintenance need a kind of mineral electrical apparatus repid discharge and indicating device, and at present, there is no the report of this type of technology and product in domestic document.
Summary of the invention
The purpose of this utility model is exactly for overcoming the deficiencies in the prior art, for current electric discharge device, cannot indicate current state, feedback signal, shortcoming that discharge resistance caloric value is large to user, for a kind of repid discharge of explosion-isolating mine frequency converter and the design of indicating device, make can indicate in device busy process current discharge condition and by signal feedback to controller, improve discharge resistance mounting means, set up heat dissipation cold plate, and cold water circulating system is set in cold drawing, by cold drawing cold water circulating system, take away the heat of resistance internal cause discharge generation.Discharge resistance is under the effect of cold drawing, and temperature is moderate and stable.May ultimately reach the object of saving time, guarantee attendant's safety.Thereby eliminate the potential safety hazard of mine-used frequency-converter electric discharge device.
The utility model is to realize by such technical scheme: the repid discharge of explosion-isolating mine frequency converter and indicating device, it is characterized in that, and comprise circuit and resistance heat abstractor, described circuit is by vacuum relay K, discharge resistance R
1, light coupling relay loop, resistance-capacitance absorption loop, back clamping circuit and circuit of LED form;
Normally-closed contact one end of vacuum relay K is connected to explosion-proof frequency converter capacitor C anodal (with a side of positive charge), and the other end of normally-closed contact connects discharge resistance R
1, electric discharge light coupling relay U resistance R
1the other end and explosion-proof frequency converter electric capacity negative pole between and connect light coupling relay loop, back clamping diode, resistance-capacitance absorption loop and circuit of LED;
Light coupling relay loop is by current-limiting resistance R
2, diode D
1be connected in series successively formation with the input of light coupling relay U isolation signals, back clamping circuit comprises back clamping diode D
2, resistance-capacitance absorption loop is by resistance R
3and capacitor C
1form, circuit of LED is by current-limiting resistance R
4, light-emitting diode D
3form;
During the electric discharge of explosion-proof frequency converter capacitor C, light-emitting diode D
3light, meanwhile, the feedback signal that light coupling relay U action produces sends by light coupling relay U feedback signal output the controller consisting of digital meter's controller to, by digital instrument, shows discharge capacity;
The thermal component of described resistance heat abstractor is processed by a rectangle cold drawing, and the inside of cold drawing is processed with water route, and water route comprises water inlet and delivery port;
Discharge resistance R
1lead-in wire by 2 splicing ears, fix, the contact of its packed part, on cold drawing, is insulated between splicing ear and cold drawing, cold drawing keeps cold water circulation in inner water route, takes away discharge resistance R
1the heat producing at discharge process, by cold drawing to discharge resistance R
1packed part heat radiation, keeps its temperature stabilization.
Beneficial effect is: for current electric discharge device, cannot indicate current state, feedback signal, shortcoming that discharge resistance caloric value is large to user, in this device busy process, can indicate current discharge condition and by signal feedback to controller, and, discharge resistance is under the effect of cold drawing, and temperature is moderate and stable.May ultimately reach the object of saving time, guarantee attendant's safety, the utility model is for the potential safety hazard of current mine-used frequency-converter electric discharge device, repid discharge and indicating device have been designed, within can the energy in electric capacity being discharged into safety standard in 15 minutes, and to user, indicate in current capacitor whether to also have dump energy in the course of the work, and by signal feedback to the controller in equipment, for it, grasp the current discharge scenario of electric capacity, for doing other operation, provide basis for estimation.
Accompanying drawing explanation
Fig. 1, repid discharge and indicating device circuit diagram;
Fig. 2, thermal component front view;
Fig. 3, thermal component left view;
Fig. 4, thermal component right view.
In figure: 1. cold drawing, 2. inner water route, 3. repid discharge and indicating device shell, 4. splicing ear, 21. water inlets, 22. delivery ports.
Embodiment
For clearer, understand the utility model, describe in conjunction with the accompanying drawings and embodiments the utility model in detail:
As shown in Figures 1 to 4, the repid discharge of explosion-isolating mine frequency converter and indicating device, comprise circuit and resistance heat abstractor, and described circuit is by vacuum relay K, discharge resistance R
1, light coupling relay loop, resistance-capacitance absorption loop, back clamping circuit and circuit of LED form,
Normally-closed contact one end of vacuum relay K is connected to explosion-proof frequency converter capacitor C anodal (with a side of positive charge), and the other end of normally-closed contact connects discharge resistance R
1, discharge resistance R
1the other end and explosion-proof frequency converter electric capacity negative pole between and connect light coupling relay loop, back clamping diode, resistance-capacitance absorption loop and circuit of LED.
Light coupling relay loop is by current-limiting resistance R
2, diode D
1be connected in series successively formation with the input of light coupling relay U isolation signals, back clamping circuit comprises back clamping diode D
2, resistance-capacitance absorption loop is by resistance R
3and capacitor C
1form, circuit of LED is by current-limiting resistance R
4, light-emitting diode D
3form.
During the electric discharge of explosion-proof frequency converter capacitor C, light-emitting diode is lighted, meanwhile, the feedback signal that light coupling relay action produces sends by light coupling relay U feedback signal output the controller consisting of digital meter's controller to, by digital instrument, shows discharge capacity.
The thermal component of described resistance heat abstractor is processed by a rectangle cold drawing 1, and the inside of cold drawing 1 is processed with water route 2, and water route 2 comprises water inlet 21 and delivery port 22, discharge resistance R
1lead-in wire fixing by 2 splicing ears 4, its packed part contact is on cold drawing, insulation between splicing ear 4 and cold drawing 1, keeps cold water to circulate in the inner water route 2 of cold drawing 1, take away discharge resistance R
1the heat producing at discharge process, by 1 couple of discharge resistance R of cold drawing
1packed part heat radiation, keeps its temperature stabilization.
The repid discharge of explosion-isolating mine frequency converter and the design of indicating device, within operative installations is realized, in 15 minutes, the energy in the capacitor of mine-used frequency-converter is discharged into safety standard, and to user, indicate in current capacitor and whether also have dump energy to reduce the harmful effect to equipment itself and other components and parts in the course of the work.
According to the above description, in conjunction with art technology, can realize scheme of the present utility model.
Claims (1)
1. the repid discharge of explosion-isolating mine frequency converter and an indicating device, is characterized in that, comprises circuit and resistance heat abstractor, and described circuit is by vacuum relay K, discharge resistance R
1, light coupling relay loop, resistance-capacitance absorption loop, back clamping circuit and circuit of LED form;
It is anodal that normally-closed contact one end of vacuum relay K is connected to explosion-proof frequency converter capacitor C, and the other end of normally-closed contact connects discharge resistance R
1, electric discharge light coupling relay U resistance R
1the other end and explosion-proof frequency converter electric capacity negative pole between and connect light coupling relay loop, back clamping diode, resistance-capacitance absorption loop and circuit of LED;
Light coupling relay loop is by current-limiting resistance R
2, diode D
1be connected in series successively formation with the input of light coupling relay U isolation signals, back clamping circuit comprises back clamping diode D
2, resistance-capacitance absorption loop is by resistance R
3and capacitor C
1form, circuit of LED is by current-limiting resistance R
4, light-emitting diode D
3form;
During the electric discharge of explosion-proof frequency converter capacitor C, light-emitting diode D
3light, meanwhile, the feedback signal that light coupling relay U action produces sends by light coupling relay U feedback signal output the controller consisting of digital meter's controller to, by digital instrument, shows discharge capacity;
The thermal component of described resistance heat abstractor is processed by a rectangle cold drawing (1), and the inside of cold drawing (1) is processed with water route (2), and water route (2) comprise water inlet (21) and delivery port (22), discharge resistance R
1lead-in wire fixing by 2 splicing ears (4), its packed part contact, on cold drawing, is insulated between splicing ear (4) and cold drawing (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320358965.9U CN203416152U (en) | 2013-06-21 | 2013-06-21 | Quick discharging and indicating device for explosion-proof frequency converter for mines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320358965.9U CN203416152U (en) | 2013-06-21 | 2013-06-21 | Quick discharging and indicating device for explosion-proof frequency converter for mines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203416152U true CN203416152U (en) | 2014-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320358965.9U Expired - Fee Related CN203416152U (en) | 2013-06-21 | 2013-06-21 | Quick discharging and indicating device for explosion-proof frequency converter for mines |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203416152U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104998743A (en) * | 2015-06-08 | 2015-10-28 | 于浩 | Refrigerating explosion-proof valve for hock-type refined all-purpose muller |
| CN105119473A (en) * | 2015-08-28 | 2015-12-02 | 洛阳中重自动化工程有限责任公司 | Safety interlocking protection explosion-proof frequency converter for mine elevator and method |
-
2013
- 2013-06-21 CN CN201320358965.9U patent/CN203416152U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104998743A (en) * | 2015-06-08 | 2015-10-28 | 于浩 | Refrigerating explosion-proof valve for hock-type refined all-purpose muller |
| CN105119473A (en) * | 2015-08-28 | 2015-12-02 | 洛阳中重自动化工程有限责任公司 | Safety interlocking protection explosion-proof frequency converter for mine elevator and method |
| CN105119473B (en) * | 2015-08-28 | 2018-01-30 | 洛阳中重自动化工程有限责任公司 | A kind of explosion-proof frequency converter and method of mine hoist security interlocking protection |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140129 Termination date: 20170621 |