CN204028247U - A kind of explosion-proof frequency converter loop is detected and feedback sense circuit - Google Patents
A kind of explosion-proof frequency converter loop is detected and feedback sense circuit Download PDFInfo
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- CN204028247U CN204028247U CN201420386916.0U CN201420386916U CN204028247U CN 204028247 U CN204028247 U CN 204028247U CN 201420386916 U CN201420386916 U CN 201420386916U CN 204028247 U CN204028247 U CN 204028247U
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Abstract
The utility model discloses a kind of explosion-proof frequency converter loop detects and feedback sense circuit, comprise connection terminal, control loop, backfeed loop and earth leakage search/lockout module LD, control loop comprises relay K 1, K2, K5～K7 and energization delay relay KT3, backfeed loop comprises relay K 3 and K4, the coil of relay K 1, K3, K4, K5, K6 and K7 and energization delay relay KT3 is connected with zero line with live wire respectively, and relay K 2 coils are connected with zero line with the first normally closed contact 1K1 respectively; The 3rd normally closed contact 3K1 of relay K 1 is connected with earth leakage search/lockout module LD with normally opened contact 3K2 with the second normally closed contact 2K2 of normally opened contact 4K1 and relay K 2, and relay normally closed contact is connected with normally opened contact mechanical synchronization.The utlity model has detect rapid, non-maintaining, volume is little, the feature of convenient in carrying, can be widely used in explosion-proof technology field.
Description
Technical field
The utility model relates to explosion-proof technology field, particularly relates to a kind of explosion-proof frequency converter loop and detects and feedback sense circuit.
Background technology
Because the tunnel under coal mine is narrow, explosion-proof frequency converter cannot be accomplished the so large volume of picture integrated cabinet, and for the explosion-proof frequency converter function of colliery configuration is very complicated, the complexity of its electric loop is even higher than integrated cabinet, can not arbitrarily simplify, virtually increased again the workload of design effort, particularly existing explosion-proof frequency converter loop is detected and feedback sense circuit,, not only detection efficiency is low, and it is many to take up room, can not meet the requirement of modern extractive industry.So, design the explosion-proof frequency converter of economical rationality, be the power of seek assiduously in the industry always.
Utility model content
The purpose of this utility model is in order to overcome the deficiency of above-mentioned background technology, provides a kind of explosion-proof frequency converter loop to detect and feedback sense circuit, make it have identification fast, detect rapid, non-maintaining, volume is little, the feature of convenient in carrying.
A kind of explosion-proof frequency converter loop that the utility model provides is detected and feedback sense circuit, comprise the connection terminal that live wire and zero line form, control loop, backfeed loop and earth leakage search/lockout module LD, described control loop comprises relay K 1, K2, K5～K7 and energization delay relay KT3, described backfeed loop comprises relay K 3 and K4, one end of relay K 1 coil is passed through the normally closed contact of relay K 4 successively, the normally opened contact of the normally closed contact of relay K 5 and energization delay relay KT3 is connected with live wire, the other end of relay K 1 coil is connected with zero line, one end of relay K 2 coils is connected with the normally closed contact of K4 by the first normally closed contact 1K1 of relay K 1, the other end of relay K 2 coils is connected with zero line with the other end of relay K 1 coil respectively, described relay K 3, K4, one end of K6 and K7 coil is all connected with live wire, described relay K 3, K4, the other end of K6 and K7 coil is all connected with zero line with the other end of relay K 1 coil, one end of relay K 5 coils is connected with live wire by the first normally closed contact 1K2 of relay K 2 and the second normally closed contact 2K1 of relay K 1 successively, the other end of relay K 5 coils is connected with zero line with the other end of relay K 1 coil respectively, the coil of energization delay relay KT3 is connected with normally closed contact 1LD one end of zero line and earth leakage search/lockout module LD respectively, the described normally closed contact 1LD other end is connected with live wire, one end of the 3rd normally closed contact 3K1 of relay K 1 is connected with one end of the second normally closed contact 2K2 of relay K 2, the other end of the other end of the 3rd normally closed contact 3K1 of relay K 1 and the second normally closed contact 2K2 of relay K 2 is connected with stitch 5 with the stitch 11 of earth leakage search/lockout module LD respectively, the equal ground connection of the other end of the 3rd normally closed contact 3K1 of stitch 11 and relay K 1, the two ends of the normally opened contact 4K1 of relay K 1 are connected with the normally opened contact 3K2 two ends of relay K 2 respectively, and be connected with the other end of the stitch 6 of earth leakage search/lockout module LD and the second normally closed contact 2K2 of relay K 2 respectively, the stitch 12 of earth leakage search/lockout module LD is connected with the voltage output end of frequency converter, the normally closed contact 1K1 of relay K 1, 2K1, 3K1 is connected with normally opened contact 4K1 mechanical synchronization, the normally closed contact 1K2 of relay K 2, 2K2 is connected with normally opened contact 3K2 mechanical synchronization.
In technique scheme, between described relay K 1 coil and the normally closed contact of relay K 4, be provided with frequency converter output switch D06, described relay K 3, K4, K6 and K7 coil are all connected with live wire by frequency converter output switch D01, D02, D03 and D04 respectively.
In technique scheme, also comprise blower fan F, described blower fan F one end is all connected with live wire by frequency converter output switch D05, and the described blower fan F other end is connected with zero line with the other end of relay K 1 coil respectively.
The utility model explosion-proof frequency converter loop is detected and feedback sense circuit, there is following beneficial effect: the adhesive action of relay K 1 and K2 coil is for detecting the steering logic and order to main contactor and buffering contactor in control loop, the first normally closed contact 1K1 by relay K 1 is for detection of the interlock function of main contactor and buffering contactor, be connected to energization delay relay KT3 upper row and become a loop, DO6 is frequency converter output switch, and this frequency converter output switch is controlled by frequency converter self; The adhesive action of relay K 5 coils is for the detection to electric leakage signal; The adhesive action of relay K 6 coils is that DO3 is frequency converter output switch for detecting the control of control loop to outside cooling fan, and this frequency converter output switch is controlled by frequency converter self; The adhesive action of relay K 7 coils is for detecting the control of explosion-proof frequency converter control loop to filter capacitor, DO4 is frequency converter output switch, this frequency converter output switch is controlled by frequency converter self, F is the radiator fan of frequency converter inside, DO5 is frequency converter output switch, and this frequency converter output switch is controlled by frequency converter self.
Whether the adhesive action of relay K 3 coils is correct for detecting the run signal loop of explosion-proof frequency converter, and DO1 is frequency converter output switch, and this frequency converter output switch is controlled by frequency converter self; Whether the adhesive action of relay K 4 coils is correct for detecting the fault-signal loop of explosion-proof frequency converter, and DO2 is frequency converter output switch, and this frequency converter output switch is controlled by frequency converter self; Relay K 3 and K4 can detect run signal and the fault-signal in the backfeed loop in explosion-proof frequency converter respectively quickly and easily.
Backfeed loop substitutes original main contactor with relay K 3 and K4 and buffering contactor is realized the detection of electrical leakage to motor.The action of the second normally closed contact 2K1 of relay K 1 and the first normally closed contact 1K2 of relay K 2 is used for detecting feedback electric leakage signal to play protection motor and frequency converter.The action of the 3rd normally closed contact 3K1 of relay K 1 and the action of normally opened contact 4K1 and the normally closed contact 2K2 of relay K 2 and normally opened contact 3K2 detects earth leakage protection actuating signal.And the stitch 11 of earth leakage search/lockout module LD and stitch 5 are common, cooperate to detect normally closed contact 3K1 and 2K2, the stitch 11 of earth leakage search/lockout module LD and the common cooperation of stitch 6 are to detect normally opened contact 4K1 and 3K2.
Explosion-proof frequency converter loop is detected with feedback sense circuit and can be placed in completely on worktable and complete and install and detect; then its integral installation is docked with corresponding electrical part in explosion-proof cavity; realize modularization Fast Installation, reached the object of protection explosion-proof frequency converter control loop and backfeed loop.And core part is to have substituted original main contactor and buffering contactor, relay independently separately, compared to existing explosion-proof frequency converter loop, detect and feedback sense circuit, each independent relay has been realized respectively test separately, has been installed separately.Meanwhile, 220V alternating current need not pass through other outer power supply source, and whether steering logic that can direct-detection control loop is correct, and everything goes well with your work and safety to ensure again the charged line inspection.
When explosion-proof frequency converter control loop and backfeed loop exist circuit question to overhaul, because explosion-proof frequency converter volume is less than normal, cannot hold maintainer, only need on worktable, just can complete the maintenance of whole Frequency Converter Control loop and backfeed loop, maintainer only need to just can easily complete before worktable, and needn't squat, on explosion-resistant enclosure limit, be engaged in maintenance, both alleviate labour intensity, also improved work efficiency, optimized working environment.
Detect and compare with feedback sense circuit with existing explosion-proof frequency converter loop, have advantages of that identification is rapid, detection efficiency is high, non-maintaining, volume is little, convenient in carrying.
Accompanying drawing explanation
Fig. 1 is the structural representation of the detection of the utility model explosion-proof frequency converter loop and feedback sense circuit.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail, but this embodiment should not be construed as restriction of the present utility model.
Referring to Fig. 1, the utility model explosion-proof frequency converter loop is detected and feedback sense circuit, comprises connection terminal, control loop, backfeed loop, earth leakage search/lockout module LD and blower fan F that live wire and zero line form.
Described control loop comprises relay K 1, K2, K5～K7 and energization delay relay KT3, described backfeed loop comprises relay K 3 and K4, one end of relay K 1 coil is passed through the normally closed contact of relay K 4 successively, the normally opened contact of the normally closed contact of relay K 5 and energization delay relay KT3 is connected with live wire, the other end of relay K 1 coil is connected with zero line, one end of relay K 2 coils is connected with the normally closed contact of K4 by the first normally closed contact 1K1 of relay K 1, the other end of relay K 2 coils is connected with zero line with the other end of relay K 1 coil respectively, described relay K 3, K4, one end of K6 and K7 coil is all connected with live wire, described relay K 3, K4, the other end of K6 and K7 coil is all connected with zero line with the other end of relay K 1 coil, one end of relay K 5 coils is connected with live wire by the first normally closed contact 1K2 of relay K 2 and the second normally closed contact 2K1 of relay K 1 successively, the other end of relay K 5 coils is connected with zero line with the other end of relay K 1 coil respectively, the coil of energization delay relay KT3 is connected with normally closed contact 1LD one end of zero line and earth leakage search/lockout module LD respectively, the described normally closed contact 1LD other end is connected with live wire, one end of the 3rd normally closed contact 3K1 of relay K 1 is connected with one end of the second normally closed contact 2K2 of relay K 2, the other end of the other end of the 3rd normally closed contact 3K1 of relay K 1 and the second normally closed contact 2K2 of relay K 2 is connected with stitch 5 with the stitch 11 of earth leakage search/lockout module LD respectively, the equal ground connection of the other end of the 3rd normally closed contact 3K1 of stitch 11 and relay K 1, the two ends of the normally opened contact 4K1 of relay K 1 are connected with the normally opened contact 3K2 two ends of relay K 2 respectively, and be connected with the other end of the stitch 6 of earth leakage search/lockout module LD and the second normally closed contact 2K2 of relay K 2 respectively, the stitch 12 of earth leakage search/lockout module LD is connected with the voltage output end of frequency converter, the normally closed contact 1K1 of relay K 1, 2K1, 3K1 is connected with normally opened contact 4K1 mechanical synchronization, the normally closed contact 1K2 of relay K 2, 2K2 is connected with normally opened contact 3K2 mechanical synchronization.
Between described relay K 1 coil and the normally closed contact of relay K 4, be provided with frequency converter output switch D06, described relay K 3, K4, K6 and K7 coil are all connected with live wire by frequency converter output switch D01, D02, D03 and D04 respectively.
Described blower fan F one end is all connected with live wire by frequency converter output switch D05, and the described blower fan F other end is connected with zero line with the other end of relay K 1 coil respectively.
The adhesive action of relay K 1 and K2 coil is for detecting the steering logic and order to main contactor and buffering contactor in control loop, the first normally closed contact 1K1 by relay K 1 is for detection of the interlock function of main contactor and buffering contactor, be connected to energization delay relay KT3 upper row and become a loop, DO6 is frequency converter output switch, and this frequency converter output switch is controlled by frequency converter self; The adhesive action of relay K 5 coils is for the detection to electric leakage signal; The adhesive action of relay K 6 coils is that DO3 is frequency converter output switch for detecting the control of control loop to outside cooling fan, and this frequency converter output switch is controlled by frequency converter self; The adhesive action of relay K 7 coils is for detecting the control of explosion-proof frequency converter control loop to filter capacitor, DO4 is frequency converter output switch, this frequency converter output switch is controlled by frequency converter self, F is the radiator fan of frequency converter inside, DO5 is frequency converter output switch, and this frequency converter output switch is controlled by frequency converter self.
The utility model explosion-proof frequency converter loop is detected with the principle of work of feedback sense circuit: whether the adhesive action of relay K 3 coils is correct for detecting the run signal loop of explosion-proof frequency converter, DO1 is frequency converter output switch, and this frequency converter output switch is controlled by frequency converter self; Whether the adhesive action of relay K 4 coils is correct for detecting the fault-signal loop of explosion-proof frequency converter, and DO2 is frequency converter output switch, and this frequency converter output switch is controlled by frequency converter self; Relay K 3 and K4 can detect run signal and the fault-signal in the backfeed loop in explosion-proof frequency converter respectively quickly and easily.
Backfeed loop substitutes original main contactor with relay K 3 and K4 and buffering contactor is realized the detection of electrical leakage to motor.The action of the second normally closed contact 2K1 of relay K 1 and the first normally closed contact 1K2 of relay K 2 is used for detecting feedback electric leakage signal to play protection motor and frequency converter.The action of the 3rd normally closed contact 3K1 of relay K 1 and the action of normally opened contact 4K1 and the normally closed contact 2K2 of relay K 2 and normally opened contact 3K2 detects earth leakage protection actuating signal.And the stitch 11 of earth leakage search/lockout module LD and stitch 5 are common, cooperate to detect normally closed contact 3K1 and 2K2, the stitch 11 of earth leakage search/lockout module LD and the common cooperation of stitch 6 are to detect normally opened contact 4K1 and 3K2.
The utility model explosion-proof frequency converter loop is detected with the course of work of feedback sense circuit as follows: after explosion-proof frequency converter energising, live wire L and the zero line N of 220V obtain electric, the energization delay relay KT3 of explosion-proof frequency converter starts timing, energization delay relay KT3 timing 20 seconds, at this moment to start to detect explosion-proof frequency converter be whether stitch 12 has shorted to earth or phase fault situation to occur to motor (not shown) junction to the earth leakage search/lockout module LD of explosion-proof frequency converter, if had, earth leakage search/lockout module LD normally closed contact 1LD (stitch 7 and 8) becomes normally opened contact by normally closed contact, then the also adhesive of coil of relay K 5, cut off explosion-proof frequency converter main circuit (circuit in explosion-proof frequency converter) power supply, if do not had, carry out next step, after energization delay relay KT3 timing finishes, relay K 2 coils obtain electric adhesive, the normally opened contact of corresponding relay K 2 becomes normally closed contact, normally closed contact becomes normally opened contact, 1K2 disconnects leakage detecting circuit, 2K2 disconnects the ground loop of earth leakage search/lockout module LD, 3K2 connects earth leakage search/lockout module LD operating loop, explosion-proof frequency converter starts to deposit electricity simultaneously, after frequency converter voltage is raised to more than 80%, DO6 becomes normally closed contact by normally opened contact, relay K 1 coil adhesive, the normally opened contact of corresponding relay K 1 becomes normally closed contact, normally closed contact becomes normally opened contact, the first normally closed contact 1K1 disconnects, and become interlocking with relay K 2 row, the second normally closed contact 2K1 disconnects leakage detecting circuit, the 3rd normally closed contact 3K1 disconnects the ground loop of earth leakage search/lockout module LD, normally opened contact 4K1 connects the operating loop of earth leakage search/lockout module LD.Frequency converter output switch DO1, DO2, DO3, DO4, DO5, DO6 are the output connection of explosion-proof frequency converter control circuit and power circuit.
Obviously, those skilled in the art can carry out various changes and modification and not depart from spirit and scope of the present utility model the utility model.Like this, if within of the present utility model these are revised and modification belongs to the scope of the utility model claim and equivalent technologies thereof, the utility model is also intended to comprise these changes and modification interior.
The content not being described in detail in this instructions belongs to the known prior art of professional and technical personnel in the field.
Claims (3)
1. an explosion-proof frequency converter loop is detected and feedback sense circuit, comprise the connection terminal that live wire and zero line form, control loop, backfeed loop and earth leakage search/lockout module LD, it is characterized in that: described control loop comprises relay K 1, K2, K5～K7 and energization delay relay KT3, described backfeed loop comprises relay K 3 and K4, one end of relay K 1 coil is passed through the normally closed contact of relay K 4 successively, the normally opened contact of the normally closed contact of relay K 5 and energization delay relay KT3 is connected with live wire, the other end of relay K 1 coil is connected with zero line, one end of relay K 2 coils is connected with the normally closed contact of K4 by the first normally closed contact 1K1 of relay K 1, the other end of relay K 2 coils is connected with zero line with the other end of relay K 1 coil respectively, described relay K 3, K4, one end of K6 and K7 coil is all connected with live wire, described relay K 3, K4, the other end of K6 and K7 coil is all connected with zero line with the other end of relay K 1 coil, one end of relay K 5 coils is connected with live wire by the first normally closed contact 1K2 of relay K 2 and the second normally closed contact 2K1 of relay K 1 successively, the other end of relay K 5 coils is connected with zero line with the other end of relay K 1 coil respectively, the coil of energization delay relay KT3 is connected with normally closed contact 1LD one end of zero line and earth leakage search/lockout module LD respectively, the described normally closed contact 1LD other end is connected with live wire, one end of the 3rd normally closed contact 3K1 of relay K 1 is connected with one end of the second normally closed contact 2K2 of relay K 2, the other end of the other end of the 3rd normally closed contact 3K1 of relay K 1 and the second normally closed contact 2K2 of relay K 2 is connected with stitch 5 with the stitch 11 of earth leakage search/lockout module LD respectively, the equal ground connection of the other end of the 3rd normally closed contact 3K1 of stitch 11 and relay K 1, the two ends of the normally opened contact 4K1 of relay K 1 are connected with the normally opened contact 3K2 two ends of relay K 2 respectively, and be connected with the other end of the stitch 6 of earth leakage search/lockout module LD and the second normally closed contact 2K2 of relay K 2 respectively, the stitch 12 of earth leakage search/lockout module LD is connected with the voltage output end of frequency converter, the normally closed contact 1K1 of relay K 1, 2K1, 3K1 is connected with normally opened contact 4K1 mechanical synchronization, the normally closed contact 1K2 of relay K 2, 2K2 is connected with normally opened contact 3K2 mechanical synchronization.
2. explosion-proof frequency converter according to claim 1 loop is detected and feedback sense circuit, it is characterized in that: between described relay K 1 coil and the normally closed contact of relay K 4, be provided with frequency converter output switch D06, described relay K 3, K4, K6 and K7 coil are all connected with live wire by frequency converter output switch D01, D02, D03 and D04 respectively.
3. explosion-proof frequency converter according to claim 1 and 2 loop is detected and feedback sense circuit, it is characterized in that: also comprise blower fan F, described blower fan F one end is all connected with live wire by frequency converter output switch D05, and the described blower fan F other end is connected with zero line with the other end of relay K 1 coil respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420386916.0U CN204028247U (en) | 2014-07-14 | 2014-07-14 | A kind of explosion-proof frequency converter loop is detected and feedback sense circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420386916.0U CN204028247U (en) | 2014-07-14 | 2014-07-14 | A kind of explosion-proof frequency converter loop is detected and feedback sense circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107676208A (en) * | 2017-11-07 | 2018-02-09 | 江西鑫通机械制造有限公司 | Explosion-proof engine starting protection circuit and its control method |
| CN109049593A (en) * | 2018-07-13 | 2018-12-21 | 海天塑机集团有限公司 | A kind of safety return circuit of the vertical injection molding machine with servo turntable |
| CN112261748A (en) * | 2020-11-03 | 2021-01-22 | 安邦电气股份有限公司 | Explosion-proof self-temperature-limiting electric tracing band |
-
2014
- 2014-07-14 CN CN201420386916.0U patent/CN204028247U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107676208A (en) * | 2017-11-07 | 2018-02-09 | 江西鑫通机械制造有限公司 | Explosion-proof engine starting protection circuit and its control method |
| CN107676208B (en) * | 2017-11-07 | 2023-11-24 | 江西鑫通机械制造有限公司 | Explosion-proof engine starting protection circuit and control method thereof |
| CN109049593A (en) * | 2018-07-13 | 2018-12-21 | 海天塑机集团有限公司 | A kind of safety return circuit of the vertical injection molding machine with servo turntable |
| CN109049593B (en) * | 2018-07-13 | 2024-04-30 | 海天塑机集团有限公司 | Safety loop of vertical injection molding machine with servo turntable |
| CN112261748A (en) * | 2020-11-03 | 2021-01-22 | 安邦电气股份有限公司 | Explosion-proof self-temperature-limiting electric tracing band |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141217 Termination date: 20190714 |
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| CF01 | Termination of patent right due to non-payment of annual fee |