CN202514234U - Device for preventing mistaken explosion caused by electromagnetic interference in explosion relevant operation - Google Patents
Device for preventing mistaken explosion caused by electromagnetic interference in explosion relevant operation Download PDFInfo
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- CN202514234U CN202514234U CN 201220082562 CN201220082562U CN202514234U CN 202514234 U CN202514234 U CN 202514234U CN 201220082562 CN201220082562 CN 201220082562 CN 201220082562 U CN201220082562 U CN 201220082562U CN 202514234 U CN202514234 U CN 202514234U
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Abstract
The utility model relates to a device for preventing mistaken explosions caused by electromagnetic interference in explosion relevant operation. The device comprises an explosion initiating power supply, an explosion initiating controller and a power controlled switch which are connected to an initiating explosive device. A capacitor is connected between the explosion initiating controller and the power controlled switch, the other end of the capacitor is grounded. According to the device of the utility model, the explosion initiating controller and the power controlled switch are grounded through the capacitor therebetween, which enables the following advantages of the device: a risk of a mistaken explosion caused by spike pulses outputted by a power amplifying circuit which led by instability of power supply can be effectively eliminated; and a risk of a mistaken explosion caused by stray currents which enter an explosion initiating circuit through coupling in a complex electromagnetic environment can be effectively eliminated.
Description
Technical field
The utility model relates to a kind of circuit safety device, relates in particular to prevent in a kind of involving explosives operation that electromagnetic interference from causing the device that mistake is quick-fried, is widely used in the involving explosives operation of power amplification detonation chain control.
Background technology
At present, in engineering explosion, city controlled blasting, blast processing and relate in the scientific research test that explosive uses, adopt power amplification circuit to control mostly and detonate.Because the electromagnetic interference that various high-power electric appliances, communication base station, wireless device etc. cause in the actual life is ubiquitous; In the bursting work of power amplification circuit control; These electromagnetic interference may cause the quick-fried incident of mistake, even cause the serious accident of casualties.Cause electromagnetic interference to cause that the quick-fried reason of mistake mainly contains:
1. in the power amplifier detonation chain of insurance institution is arranged, when control system is sent the signal of arming, may produce the bigger spike of amplitude on the ignition signal line, this pulse signal is enough to cause that priming system detonates.
2. when comparatively strong electromagnetic interference occurring around the bursting work zone, these electromagnetic interference also may get into circuit through coupling with the form of stray electrical current, in circuit, inspire pulse signal, trigger the power control switch, thereby cause that the priming system mistake is quick-fried.
Because the quick-fried incident randomness of mistake that electromagnetic interference causes is big, and take precautions against difficulty, this problem becomes the maximum hidden danger that threatens bursting work personnel personal safety.For eliminating the potential safety hazard that electromagnetic interference is brought, the precautionary measures of taking at present are:
1. strengthen operating area electromagnetism control, when carrying out bursting work, close near the high-power electric appliance equipment in operating area, close Wireless Telecom Equipment, the operating personnel wears anti-static clothing, and is carrying out bursting work after the program of strict execution elimination static;
2. strengthen the insulation of detonation chain, guarantee that the detonating cord insulating barrier is intact, the circuit that will detonate in case of necessity is built on stilts to be laid, and carries out safeguard measure, prevents the interference that the breakage of line insulation layer, immersion etc. cause;
3. shorten the activity duration, particularly from being wired to the time of detonating.
Though above-mentioned measure can effectively reduce the quick-fried incident of the mistake that causes because of electromagnetic interference; But in the industrial environment in modern times; The bursting work zone exists a large amount of unknown electromagnetic interference sources toward contact, only depends on the electromagnetism control of operating area and the existing precautionary measures can't eliminate fully at all.
Summary of the invention
In order effectively to eliminate the spike that causes because of non-time break in the power amplification circuit; Eliminate under the complex electromagnetic environment through coupling and get into the spike that the stray electrical current of circuit causes; Thereby reduce the quick-fried probability of mistake, farthest ensure explosion practitioner's personal safety; The utility model provides and prevents in a kind of involving explosives operation that electromagnetic interference from causing the device that mistake is quick-fried; Comprise the power supply that detonates (1), initiation control device (2), the power control switch (3) that are connected with priming system (5); It is characterized in that: between said initiation control device (2) and power control switch (3), be connected with capacitor (4), the other end ground connection of this capacitor (4).
The utility model can have been obtained following technique effect through capacitor grounding simultaneously between initiation control device and power control switch:
1. can effectively eliminate the quick-fried risk of bringing because of the unstable spike that causes that power amplification circuit is exported of power supply of mistake;
2. can effectively eliminate under the complex electromagnetic environment through coupling and get into the quick-fried risk of mistake that spike that the stray electrical current of detonation chain causes brings.
Description of drawings
Fig. 1 is the circuit block diagram of the utility model
Mark among the figure: 1, the power supply that detonates, 2, the initiation control device, 3, the power control switch, 4, capacitor, 5, priming system (detonator).
Embodiment
Understand and enforcement the utility model for the ease of those of ordinary skills, the utility model is done further to describe in detail below in conjunction with accompanying drawing and embodiment.
Prevent in a kind of involving explosives operation as shown in Figure 1 that electromagnetic interference from causing the circuit arrangement that mistake is quick-fried; Comprise the power supply 1 that detonates, initiation control device (time break generator) 2, the power control switch (insurance institution) 3 and capacitor 4 that are connected with priming system 5, what the power supply 1 that detonates, initiation control device (time break generator) 2, power control switch (insurance institution) 3 adopted is existing known components and parts.Capacitor 4 is confirmed according to the circuit load situation, under ageing prerequisite is detonated in assurance, preferentially selects the capacitor of larger capacity for use.One of capacitor 4 terminates between initiation control device 2 and the power control switch 3, other end ground connection.
During use, connect after each parts the energized switch.When the moment that mains switch is connected, because power supply stability itself is bad, then in circuit, may excite the big spike of amplitude after perhaps connecting, such spike may trigger power control switch or insurance institution, thus the mistake that causes priming system is quick-fried.Because serial connection capacitor 4 between initiation control device 2 and power control switch 3; The spike that is produced by power end is through this capacitor 4 time; Act on the filtering that realizes spike through the filtering of capacitor with at a distance from straight, thereby elimination causes the quick-fried risk of mistake that the spike of power amplification circuit output brings because of power supply is unstable.
If what adopt is stable power comparatively, then whole detonation chain treating under the triggering state, and the signal of telecommunication that is sent by the initiation control device instructs the ignition of the output priming system of control circuit.If comparatively strong electromagnetic interference is arranged in the circuit near region; This electromagnetic interference can excite the big spike of amplitude through coupling in detonation chain; Form one or several duration are short, amplitude is high spike; These pulse signals may trigger power control switch or insurance institution, thereby the mistake that causes priming system is quick-fried.In like manner; Because serial connection capacitor 4 between initiation control device 2 and power control switch 3; The spike that is produced by power end is through electric capacity the time; Act on the filtering that realizes spike through the filtering of electric capacity with at a distance from straight, thereby elimination causes the quick-fried risk of mistake that the spike of power amplification circuit output brings because of power supply is unstable.
In the power control circuit, when priming system does not trigger, in the circuit light current path, the effect of initiation control device is that a high level of output and the ignition signal with certain energy trigger power control switch or arming.The initiation control device often is arranged on explosion face safety zone far away, and power control switch or safeties are arranged near the priming system setting to guarantee handling safety usually.Therefore, the effect that capacitor is set in this position is to eliminate from power supply issuable spike between as the priming system of ignition energy outlet terminal, causes and misses quick-fried purpose thereby reach anti-electromagnetic interference.
In the present embodiment position capacitor is set, sends the process that afterwards capacitor is had a charging in firing command, this will cause the time delay about several milliseconds.But, have only whole small time-delay for short-delay blasting, and can not cause the relative time delay between each millisecond detonating point.Hence one can see that, and the utility model is not suitable for the strict especially firing circuit of signal real-time.
Above execution mode is merely a kind of execution mode of the utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Its concrete structure and size can be adjusted according to actual needs accordingly.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to the protection range of the utility model.
Claims (1)
1. prevent that electromagnetic interference from causing the device that mistake is quick-fried in an involving explosives operation; Comprise the power supply that detonates (1), initiation control device (2), the power control switch (3) that are connected with priming system (5); It is characterized in that: between said initiation control device (2) and power control switch (3), be connected with capacitor (4), the other end ground connection of this capacitor (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220082562 CN202514234U (en) | 2012-03-07 | 2012-03-07 | Device for preventing mistaken explosion caused by electromagnetic interference in explosion relevant operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220082562 CN202514234U (en) | 2012-03-07 | 2012-03-07 | Device for preventing mistaken explosion caused by electromagnetic interference in explosion relevant operation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202514234U true CN202514234U (en) | 2012-10-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220082562 Expired - Fee Related CN202514234U (en) | 2012-03-07 | 2012-03-07 | Device for preventing mistaken explosion caused by electromagnetic interference in explosion relevant operation |
Country Status (1)
| Country | Link |
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| CN (1) | CN202514234U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103312145A (en) * | 2012-03-07 | 2013-09-18 | 中国人民解放军总参谋部工程兵科研三所 | Device for preventing mistaken explosions caused by electromagnetic interference in explosion-relevant operations |
-
2012
- 2012-03-07 CN CN 201220082562 patent/CN202514234U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103312145A (en) * | 2012-03-07 | 2013-09-18 | 中国人民解放军总参谋部工程兵科研三所 | Device for preventing mistaken explosions caused by electromagnetic interference in explosion-relevant operations |
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Legal Events
| 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 |
Granted publication date: 20121031 Termination date: 20140307 |