CN202679340U - Universal single-line non-contact limit switch - Google Patents
Universal single-line non-contact limit switch Download PDFInfo
- Publication number
- CN202679340U CN202679340U CN 201220336210 CN201220336210U CN202679340U CN 202679340 U CN202679340 U CN 202679340U CN 201220336210 CN201220336210 CN 201220336210 CN 201220336210 U CN201220336210 U CN 201220336210U CN 202679340 U CN202679340 U CN 202679340U
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- Prior art keywords
- limit switch
- bidirectional
- switch
- triode thyristor
- anode
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Abstract
The utility model relates to a travel switch and specifically relates to a universal single-line non-contact limit switch. The limit switch is serially connected with a controlled contactor. The limit switch comprises a bidirectional silicon controlled rectifier, a trigger circuit of the bidirectional silicon controlled rectifier and an AC type infrared sensing switch. A first anode and a second anode of the bidirectional silicon controlled rectifier are serially connected with the coil of the controlled contactor and further connected on the two ends of a power supply through a control switch. The trigger circuit of the bidirectional silicon controlled rectifier comprises a bidirectional trigger diode with a first end connected with the control electrode of the bidirectional silicon controlled rectifier, a first resistor and a first capacitor respectively connected between a second end of the bidirectional trigger diode and the first anode of the bidirectional silicon controlled rectifier. The AC type infrared sensing switch is serially connected between the second end of the bidirectional trigger diode and the second anode of the bidirectional silicon controlled rectifier. The limit switch provided in the utility model has the advantages of single-line electricity acquisition, strong universality, no need of additional wires, simple manufacture, high reliability, working stability and long service lifetime.
Description
Technical field
The utility model relates to a kind of travel switch, particularly the contactless limit switch of a kind of single line.
Background technology
At present, the lead limit switch that uses on the industrial equipments such as the industrial equipments such as crane nearly all is the conventional mechanical limit switch that the contact collision type is arranged, this lead limit switch existing problems are: the mechanical driving part of lead limit switch is often because of loosening, jam and contact surface are dirty, wearing and tearing, bumping the reason such as chi distortion causes lead limit switch to lose efficacy, so that cause equipment fault and cause security incident, and the present contactless limit switch that the employing infra-red sensor switch is also arranged, but all because wiring complicated (needing in addition to increase power supply), poor reliability (the infra-red sensor switch overcurrent capability is little), versatility is poor, make the defectives such as complicated, its use is restricted, is difficult to apply.
The utility model content
The purpose of this utility model is the problem that exists for prior art, a kind of single-line electricity-getting, highly versatile are provided, do not need to increase in addition wiring, make simple, reliability is high, the contactless limit switch of universal single line of working stability, long service life.
The utility model adopts technical scheme to be for achieving the above object: the contactless limit switch of a kind of universal single line, this limit switch is connected with controlled contactor, described limit switch comprises bidirectional triode thyristor, the circuits for triggering of bidirectional triode thyristor, the AC type infra-red sensor switch, the first anode of bidirectional triode thyristor and second plate are connected with the coil of controlled contactor and are connected to both ends of power by control switch, the circuits for triggering of bidirectional triode thyristor comprise the bidirectional trigger diode that first end is connected with the control utmost point of bidirectional triode thyristor, be connected in respectively the first resistance and the first electric capacity between the first anode of bidirectional trigger diode the second end and bidirectional triode thyristor, the AC type infra-red sensor switch is connected between the second plate of the second end of bidirectional trigger diode and bidirectional triode thyristor.
Further technical scheme of the present utility model is: described limit switch also comprises the first anode that is connected in parallel on bidirectional triode thyristor and the anti-jamming circuit between second plate, and anti-jamming circuit comprises the second resistance and second electric capacity of mutual series connection.
Again further technical scheme of the present utility model is: described limit switch also comprises the indicating circuit that is connected in parallel on the first electric capacity two ends, and indicating circuit comprises the 3rd resistance and the indicator light of mutual series connection.
The contactless limit switch of the universal single line of the utility model is owing to adopt said structure, realized single-line electricity-getting, can directly replace existing all mechanical type limit switches, do not need to increase in addition wiring, the AC type infra-red sensor switch that adopts existing advanced person is that the high bidirectional triode thyristor of transducer and reliability is executive component, make its working stability reliable, spacing distance can be adjustable in the 0.1m-8m scope according to infra-red sensor switch, versatility extremely strong (can control all A.C. contactors in the 36V-380V scope), significantly promote useful life.
Below in conjunction with drawings and Examples the contactless limit switch of the universal single line of the utility model is described further.
Description of drawings
Fig. 1 is the contactless limit switch circuit theory of the universal single line of the utility model schematic diagram.
Embodiment
As shown in Figure 1, the contactless limit switch of the universal single line of the utility model, this limit switch is connected with controlled contactor KM, and described limit switch comprises circuits for triggering, the AC type infra-red sensor switch of bidirectional triode thyristor SCR, bidirectional triode thyristor, the first anode T of bidirectional triode thyristor SCR
1With second plate T
2Connect with the coil of controlled contactor and be connected to both ends of power by control switch.The circuits for triggering of bidirectional triode thyristor comprise bidirectional trigger diode DB that first end is connected with the control utmost point G of bidirectional triode thyristor SCR, are connected in the first anode T of bidirectional trigger diode DB the second end and bidirectional triode thyristor SCR respectively
1Between the first resistance R
1And the first capacitor C
1, the AC type infra-red sensor switch is connected on the second end of bidirectional trigger diode DB and the second plate T of bidirectional triode thyristor SCR
2Between, the AC type infra-red sensor switch is the infra-red sensor switch that can connect alternating current.
Described limit switch also comprises the first anode T that is connected in parallel on bidirectional triode thyristor SCR
1With second plate T
2Between anti-jamming circuit, anti-jamming circuit comprises the second resistance R of mutual series connection
2And the second capacitor C
2Limit switch also comprises and is connected in parallel on the first capacitor C
1The indicating circuit at two ends, indicating circuit comprise the 3rd resistance R of mutual series connection
3And indicator light L, indicator light L is LED light.
During use, the Closed control K switch, the AC type infra-red sensor switch is by coil, the first capacitor C of contactor KM
1, the first resistance R
1Get electric work, thereby the A point obtains voltage in the drawings, so that the control utmost point G of bidirectional triode thyristor SCR passes through the controlled voltage of bidirectional trigger diode DB, thereby make the first anode T of bidirectional triode thyristor SCR
1With second plate T
2Conducting, contactor work, the equipment of contactor control normally moves, and indicator light L is bright; When equipment runs to the stroke limit position, the AC type infra-red sensor switch detects the infrared external reflection echo, contact (not being that inventive point is not shown) in the AC type infra-red sensor switch disconnects, the A point voltage disappears, be the control utmost point G no-voltage of bidirectional triode thyristor SCR, the first anode T of bidirectional triode thyristor SCR
1With second plate T
2Turn-off, the coil losing electricity of contactor KM, the equipment of contactor control quits work, and indicator light L extinguishes.
Above embodiment only is preferred embodiment of the present utility model; as variation of the present utility model; bidirectional triode thyristor SCR also available ac solid relay substitutes; and also available once-through type infra-red sensor switch and the rectification circuit replacement of AC type infra-red sensor switch; all modifications of within spirit of the present utility model and principle, doing, be equal to replacement, all should be included within the protection range of the present utility model.
Claims (3)
1. contactless limit switch of universal single line, this limit switch is connected with controlled contactor (KM), it is characterized in that, described limit switch comprises circuits for triggering, the AC type infra-red sensor switch of bidirectional triode thyristor (SCR), bidirectional triode thyristor, the first anode (T of bidirectional triode thyristor
1) and second plate (T
2) connect with the coil of controlled contactor (KM) and be connected to both ends of power by control switch (K), the circuits for triggering of bidirectional triode thyristor comprise bidirectional trigger diode (DB) that first end is connected with the control utmost point (G) of bidirectional triode thyristor, are connected in the first anode (T of bidirectional trigger diode (DB) the second end and bidirectional triode thyristor respectively
1) between the first resistance (R
1) and the first electric capacity (C
1), the AC type infra-red sensor switch is connected on the second end of bidirectional trigger diode (DB) and the second plate (T of bidirectional triode thyristor
2) between.
2. the contactless limit switch of universal single line as claimed in claim 1 is characterized in that, described limit switch also comprises the first anode (T that is connected in parallel on bidirectional triode thyristor (SCR)
1) and second plate (T
2) between anti-jamming circuit, anti-jamming circuit comprises the second resistance (R of mutual series connection
2) and the second electric capacity (C
2).
3. the contactless limit switch of universal single line as claimed in claim 1 is characterized in that, described limit switch also comprises and is connected in parallel on the first electric capacity (C
1) indicating circuit at two ends, indicating circuit comprises the 3rd resistance (R of mutual series connection
3) and indicator light (L).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220336210 CN202679340U (en) | 2012-07-12 | 2012-07-12 | Universal single-line non-contact limit switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220336210 CN202679340U (en) | 2012-07-12 | 2012-07-12 | Universal single-line non-contact limit switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202679340U true CN202679340U (en) | 2013-01-16 |
Family
ID=47500212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220336210 Expired - Fee Related CN202679340U (en) | 2012-07-12 | 2012-07-12 | Universal single-line non-contact limit switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202679340U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109521803A (en) * | 2018-10-16 | 2019-03-26 | 滁州市云米工业设计有限公司 | A kind of range controlling mechanism device based on photoelectric reflection monitoring |
-
2012
- 2012-07-12 CN CN 201220336210 patent/CN202679340U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109521803A (en) * | 2018-10-16 | 2019-03-26 | 滁州市云米工业设计有限公司 | A kind of range controlling mechanism device based on photoelectric reflection monitoring |
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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: 20130116 Termination date: 20150712 |
|
| EXPY | Termination of patent right or utility model |