CN217954709U - Closing detection circuit for drop-out fuse - Google Patents
Closing detection circuit for drop-out fuse Download PDFInfo
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- CN217954709U CN217954709U CN202221278810.XU CN202221278810U CN217954709U CN 217954709 U CN217954709 U CN 217954709U CN 202221278810 U CN202221278810 U CN 202221278810U CN 217954709 U CN217954709 U CN 217954709U
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- 238000001514 detection method Methods 0.000 title claims abstract description 28
- 238000005070 sampling Methods 0.000 claims abstract description 37
- 230000003750 conditioning effect Effects 0.000 claims abstract description 22
- 239000003990 capacitor Substances 0.000 claims description 18
- 230000003068 static effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000001012 protector Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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Abstract
The utility model discloses a combined floodgate detection circuitry for drop out fuse for judge whether combined floodgate of drop out fuse, including control circuit, voltage sampling circuit, signal conditioning circuit and combined floodgate sampling circuit that targets in place, voltage sampling circuit's output with signal conditioning circuit's input electric connection and signal conditioning circuit's output with combined floodgate sampling circuit's that targets in place output respectively with control circuit electric connection. The utility model discloses a combined floodgate detection circuitry for drop out fuse, it carries out a combined floodgate detection to the fuse-tube through voltage sampling circuit and signal conditioning circuit to sampling circuit that targets in place through the combined floodgate carries out the secondary and detects, targets in place with guaranteeing that the fuse-tube really closes a floodgate, and it has advantages such as detection precision height, security height and stable in structure.
Description
Technical Field
The utility model belongs to the technical field of drop out fuse, concretely relates to combined floodgate detection circuitry for drop out fuse.
Background
The fuse is an overcurrent protection electrical appliance. The protector is widely applied to high-low voltage distribution systems, control systems and electric equipment and is used as a short-circuit or overcurrent protector. When the current exceeds the specified value, the melt is fused by the heat generated by itself, and the circuit is disconnected. The electric drop-out fuse is an outdoor high-voltage protector, is assembled in a high-voltage side of a distribution transformer or a distribution line strut circuit, is used for short circuit and overload protection and switching on and off of the transformer and the circuit to accord with current, and is connected in series in a protected circuit.
The high-voltage drop-out fuse is arranged between a high-voltage line of a power grid and a transformer, so that the maintenance and the overhaul of transformer equipment and lines or the requirement of power limitation are facilitated. Ordinary high-voltage drop out fuse, generally by high-pressure vase, fuse tube, high-voltage switch wiring, fuse tube one end and vase high-voltage switch wiring swing joint, the other end passes through fuse activity shackle and connects on the vase, when separating brake or closing a floodgate, need use special high-voltage insulation stick manual work to push up or pull down, insulating boots and insulating gloves need be dressed to the during operation operating personnel, the operation is more troublesome, and the incident takes place easily, when the bad weather operation such as rain very easily takes place personal safety accident.
Publication number 208637377U, patent name: the utility model discloses an electronic drop out fuse's utility model patent, it carries out unmanned automatic switching-on and combined floodgate to the fuse-link through driving motor to solve the potential safety hazard that manual operation brought, but it can't learn whether combined floodgate targets in place when closing a floodgate, if the fuse drops easily that moving contact and static contact can't be closed a floodgate and target in place, thereby influences the break-make and bring the potential safety hazard.
Therefore, the above problems are further improved.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a detection circuitry that closes a floodgate for drop out fuse, it carries out a detection that closes a floodgate to the fuse-tube through voltage sampling circuit and signal conditioning circuit to sampling circuit that targets in place through closing a floodgate carries out the secondary and detects, in order to ensure that the fuse-tube really closes a floodgate and targets in place, it has advantages such as the detection precision is high, the security is high and stable in structure.
In order to achieve the above object, the utility model provides a closing detection circuitry for drop out fuse for judge whether closing a floodgate of drop out fuse, including control circuit, voltage sampling circuit, signal conditioning circuit and the combined floodgate sampling circuit that targets in place, voltage sampling circuit's output with signal conditioning circuit's input electric connection and signal conditioning circuit's output with combined floodgate sampling circuit's that targets in place output respectively with control circuit electric connection, wherein:
the control circuit comprises a controller U201, the voltage sampling circuit (when the switch is switched on, a high-voltage circuit is conducted to a terminal, so that whether the moving contact touches a fixed contact or not can be judged by acquiring whether the moving contact has voltage or not) comprises a transformer T300, a transformer T301 and a transformer T302, the signal conditioning circuit comprises an operational amplifier U300B, an operational amplifier U300A and an operational amplifier U301A, the output end of the transformer T300 is electrically connected with the negative input end of the operational amplifier U300B, the output end of the operational amplifier U300B is electrically connected with a first acquisition end of the controller U201, the output end of the transformer T301 is electrically connected with the negative input end of the operational amplifier U300A, the output end of the operational amplifier U300A is electrically connected with a second acquisition end of the controller U201, the output end of the transformer T302 is electrically connected with the negative input end of the operational amplifier U301A, and the output end of the operational amplifier U301A is electrically connected with a third acquisition end of the controller U201;
the switching-on in-place sampling circuit comprises a photoelectric coupler U302, a photoelectric coupler U303 and a photoelectric coupler U304, wherein a collector electrode of the photoelectric coupler U302 is electrically connected with a fourth acquisition end (29 pin) of the controller U201, a collector electrode of the photoelectric coupler U303 is electrically connected with a fifth acquisition end (26 pin) of the controller U201, and a collector electrode of the photoelectric coupler U304 is electrically connected with a sixth acquisition end (27 pin) of the controller U201.
As a further preferable technical solution of the above technical solution, an input end (1 pin) of the transformer T300 is connected to a first (drop-out fuse) input end (UA) through a resistor R350, a resistor R300 is connected between a negative input end and an output end of the operational amplifier U300B, two ends of the resistor R300 are connected in parallel to a capacitor C300, the output end of the operational amplifier U300B is electrically connected to a connection end 10 pin of the controller U201 through a resistor R301, and one end of the resistor R301, which is far away from the operational amplifier U300B, is further grounded through a capacitor C302;
an input end (1 pin) of the transformer T301 is connected to a second (drop-out fuse) input end (UB) through a resistor R351, a resistor R302 is connected between a negative input end and an output end of the operational amplifier U300A, two ends of the resistor R302 are connected in parallel to a capacitor C303, an output end of the operational amplifier U300A is electrically connected to a connection end 9 pin of the controller U201 through a resistor R305, and one end of the resistor R305 away from the operational amplifier U300A is further grounded through a capacitor C304;
an input end (1 pin) of the transformer T302 is connected to a third (drop-out fuse) input end (UC) through a resistor R352, a resistor R311 is connected between a negative input end and an output end of the operational amplifier U301A, two ends of the resistor R311 are connected in parallel to a capacitor C306, the output end of the operational amplifier U301A is electrically connected to a connection end 8 pin of the controller U201 through a resistor R313, and one end, far away from the operational amplifier U301A, of the resistor R313 is grounded through a capacitor C308.
As a further preferable technical solution of the above technical solution, the collector of the photocoupler U302 is further connected to a power supply terminal (VCC 1) through a resistor R317, and a resistor R438 and a light emitting diode D409 connected in series are connected in parallel at two ends of the resistor R317;
the collector of the photoelectric coupler U303 is also connected with a power supply end (VCC 1) through a resistor R319, and two ends of the resistor R319 are connected with a resistor R439 and a light emitting diode D410 which are connected in series in parallel;
the collector of the photocoupler U304 is also connected with a power supply terminal (VCC 1) through a resistor R321, and a resistor R440 and a light emitting diode D411 which are connected in series are connected in parallel at two ends of the resistor R321.
As a further preferable technical solution of the above technical solution, the closing detection circuit for a drop-out fuse further includes a power supply circuit, and the power supply circuit is electrically connected to the control circuit, the voltage sampling circuit, the signal conditioning circuit, and the closing in-place sampling circuit, respectively.
As a further preferable technical solution of the above technical solution, the anode of the photocoupler U302 is connected to the power supply terminal (VCC 2) through a resistor R316, the anode of the photocoupler U303 is connected to the power supply terminal (VCC 2) through a resistor R318, and the anode of the photocoupler U304 is connected to the power supply terminal (VCC 2) through a resistor R320.
Drawings
Fig. 1 is a control circuit diagram of a closing detection circuit for a drop-out fuse of the present invention.
Fig. 2 is the utility model discloses a voltage sampling circuit and signal conditioning circuit diagram for drop out fuse's combined floodgate detection circuitry.
Fig. 3 is the utility model discloses a combined floodgate sampling circuit diagram that targets in place that is used for combined floodgate detection circuitry of drop out fuse.
Fig. 4 is a power circuit diagram of a closing detection circuit for a drop-out fuse of the present invention.
Fig. 5 is a drop-out fuse structure diagram of the closing detection circuit for a drop-out fuse of the present invention.
The reference numerals include: 10. a drop-out fuse; 11. a fuse tube; 111. a moving contact; 12. a extinguishing shield; 121. static contact; 3. swinging arms; 14. a push-pull rod; 15. a drive motor; 16. a drive gear; 17. a drive rod; 18. and (7) a pin shaft.
Detailed Description
The following description is provided to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents and other technical solutions without departing from the spirit and scope of the invention.
The utility model discloses a combined floodgate detection circuitry for drop out fuse combines preferred embodiment below, makes further description to utility model's concrete embodiment.
In the embodiment of the present invention, those skilled in the art will note that the drop-out fuse and the like of the present invention can be regarded as the prior art.
Preferred embodiments.
The utility model discloses a closing detection circuitry for drop out fuse for judge whether closing a floodgate of drop out fuse, including control circuit, voltage sampling circuit, signal conditioning circuit and the combined floodgate sampling circuit that targets in place, voltage sampling circuit's output with signal conditioning circuit's input electric connection and signal conditioning circuit's output with combined floodgate sampling circuit's that targets in place output respectively with control circuit electric connection, wherein:
the control circuit comprises a controller U201, the voltage sampling circuit (when a switch is switched on, a high-voltage circuit is conducted to a terminal, so that whether a moving contact touches a fixed contact or not can be judged by acquiring whether voltage exists on the moving contact and the like) comprises a transformer T300, a transformer T301 and a transformer T302, the signal conditioning circuit comprises an operational amplifier U300B, an operational amplifier U300A and an operational amplifier U301A, the output end of the transformer T300 is electrically connected with the negative input end of the operational amplifier U300B, the output end of the operational amplifier U300B is electrically connected with the first acquisition end of the controller U201, the output end of the transformer T301 is electrically connected with the negative input end of the operational amplifier U300A, the output end of the operational amplifier U300A is electrically connected with the second acquisition end of the controller U201, the output end of the transformer T302 is electrically connected with the negative input end of the operational amplifier U301A, and the output end of the operational amplifier U301A is electrically connected with the third acquisition end of the controller U201;
the switching-on in-place sampling circuit comprises a photoelectric coupler U302, a photoelectric coupler U303 and a photoelectric coupler U304, wherein a collector electrode of the photoelectric coupler U302 is electrically connected with a fourth acquisition end (29 pin) of the controller U201, a collector electrode of the photoelectric coupler U303 is electrically connected with a fifth acquisition end (26 pin) of the controller U201, and a collector electrode of the photoelectric coupler U304 is electrically connected with a sixth acquisition end (27 pin) of the controller U201.
Specifically, an input end (1 pin) of the transformer T300 is connected to an input end (UA) of a first (drop-out fuse) through a resistor R350, a resistor R300 is connected between a negative input end and an output end of the operational amplifier U300B, two ends of the resistor R300 are connected in parallel with a capacitor C300, the output end of the operational amplifier U300B is electrically connected to a connection end 10 pin of the controller U201 through a resistor R301, and one end of the resistor R301, which is far away from the operational amplifier U300B, is also grounded through a capacitor C302;
an input end (1 pin) of the transformer T301 is connected to a second (drop-out fuse) input end (UB) through a resistor R351, a resistor R302 is connected between a negative input end and an output end of the operational amplifier U300A, two ends of the resistor R302 are connected in parallel to a capacitor C303, an output end of the operational amplifier U300A is electrically connected to a connection end 9 pin of the controller U201 through a resistor R305, and one end of the resistor R305 away from the operational amplifier U300A is further grounded through a capacitor C304;
an input end (1 pin) of the transformer T302 is connected to a third (drop-out fuse) input end (UC) through a resistor R352, a resistor R311 is connected between a negative input end and an output end of the operational amplifier U301A, two ends of the resistor R311 are connected in parallel to a capacitor C306, the output end of the operational amplifier U301A is electrically connected to a connection end 8 pin of the controller U201 through a resistor R313, and one end, far away from the operational amplifier U301A, of the resistor R313 is grounded through a capacitor C308.
More specifically, the collector of the photocoupler U302 is further connected to a power supply terminal (VCC 1) through a resistor R317, and two ends of the resistor R317 are connected in parallel to a resistor R438 and a light emitting diode D409 which are connected in series;
the collector of the photoelectric coupler U303 is also connected with a power supply end (VCC 1) through a resistor R319, and two ends of the resistor R319 are connected with a resistor R439 and a light emitting diode D410 which are connected in series in parallel;
the collector of the photocoupler U304 is also connected with a power supply terminal (VCC 1) through a resistor R321, and a resistor R440 and a light emitting diode D411 which are connected in series are connected in parallel at two ends of the resistor R321.
The switching-on detection circuit for the drop-out fuse further comprises a power supply circuit, and the power supply circuit is electrically connected with the control circuit, the voltage sampling circuit, the signal conditioning circuit and the switching-on in-place sampling circuit respectively.
Furthermore, the anode of the photocoupler U302 is connected to the power supply terminal (VCC 2) through a resistor R316, the anode of the photocoupler U303 is connected to the power supply terminal (VCC 2) through a resistor R318, and the anode of the photocoupler U304 is connected to the power supply terminal (VCC 2) through a resistor R320.
Preferably, the principle of the utility model is that:
as shown in fig. 5, the automatic drop-out fuse includes a fuse tube 11, a blowout shield 12, a swing arm 13, a push-pull rod 14, a driving motor 15, a driving gear 16 and a driving rod 17, and conventionally (the conventional fuse is not provided with driving components such as the driving motor and the like during dropping) all manually pushes the fuse tube from bottom to top by using a pin 18 as a turning point, so that a moving contact 111 of the fuse tube 11 touches a static contact 121 of the blowout shield 12, thereby completing a closing action, and the moving contact is separated from the static contact during opening;
the utility model discloses a to reduce the potential safety hazard, thus realize separating brake and combined floodgate automatically, the divide-shut brake control circuit of the utility model is generally located the switch board, and the switch board is located drop out fuse's edge, thus carries out the separating brake and the combined floodgate of wired connection to drop out fuse, because high-voltage line has three lines, so every line all need install a drop out fuse, three supporting use, thus cooperate the three-phase of high-voltage circuit;
when the fuse is required to be switched on, the control circuit receives a switching-on instruction (which can be in a form of a button), and then outputs the switching-on instruction to three relays of the switching-on circuit, each relay corresponds to one driving motor, so that each driving motor rotates forwards, the driving motor and a driving gear of the driving motor rotate, the driving rod is driven to move upwards in an inclined mode, the push-pull rod is driven, the push-pull rod drives the fuse tube to coaxially rotate around the pin shaft until the moving contact is combined with the fixed contact, and therefore the switching-on operation of 3 drop-out fuses is achieved;
the utility model discloses an it is preferable that the switching-on department of moving contact samples through the voltage sampling circuit, and three voltage sampling circuits correspond the three-phase of high-voltage line respectively, and the input of transformer is connected sampling end department, then handles the transmission to control circuit after the voltage of gathering through signal conditioning circuit, thereby judges whether there is voltage signal at control circuit department, if yes, judges that the switching-on is successful, otherwise the switching-on is unsuccessful;
and (2) secondary closing detection, namely, although a voltage signal is detected, judging whether closing is successful, but whether closing is in place cannot be judged, and the closing is probably only slightly contacted and is not stable, so that a mechanical position sensor can be installed at the static contact, when the moving contact touches the static contact and is in place, the moving contact touches the mechanical position sensor, and therefore photoelectric couplers connected with the sensor are switched on (each photoelectric coupler is in contact and switched on through a cathode (LimitA +, limitB + or LimitC +), and then the photoelectric coupler outputs a closing in-place signal to a control circuit, so that closing in place is known), so that a signal generated by the photoelectric coupler is transmitted to the control circuit, if the control circuit receives the signal transmitted by the photoelectric coupler, judging that closing is in place, and otherwise, not in place. Double detection, the precision is higher.
It is worth mentioning that the technical features such as the drop-out fuse that the utility model discloses the patent application relates to should be regarded as prior art, and the concrete structure of these technical features, theory of operation and the control mode that may involve, spatial arrangement mode adopt the conventional selection in this field can, should not be regarded as the invention point of the utility model discloses a place, the utility model discloses a do not further specifically expand the detailed description.
It will be apparent to those skilled in the art that modifications and variations can be made in the above-described embodiments, or some features of the invention may be substituted or omitted, and any modification, substitution, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (5)
1. The utility model provides a closing detection circuitry for drop out fuse for judge whether closing of drop out fuse, its characterized in that includes control circuit, voltage sampling circuit, signal conditioning circuit and the sampling circuit that targets in place that closes a floodgate, voltage sampling circuit's output with signal conditioning circuit's input electric connection and signal conditioning circuit's output with the sampling circuit that targets in place that closes a floodgate output respectively with control circuit electric connection, wherein:
the control circuit comprises a controller U201, the voltage sampling circuit comprises a transformer T300, a transformer T301 and a transformer T302, the signal conditioning circuit comprises an operational amplifier U300B, an operational amplifier U300A and an operational amplifier U301A, the output end of the transformer T300 is electrically connected with the negative input end of the operational amplifier U300B, the output end of the operational amplifier U300B is electrically connected with the first acquisition end of the controller U201, the output end of the transformer T301 is electrically connected with the negative input end of the operational amplifier U300A, the output end of the operational amplifier U300A is electrically connected with the second acquisition end of the controller U201, the output end of the transformer T302 is electrically connected with the negative input end of the operational amplifier U301A, and the output end of the operational amplifier U301A is electrically connected with the third acquisition end of the controller U201;
the switching-on in-place sampling circuit comprises a photoelectric coupler U302, a photoelectric coupler U303 and a photoelectric coupler U304, wherein a collector electrode of the photoelectric coupler U302 is electrically connected with a fourth collecting end of the controller U201, a collector electrode of the photoelectric coupler U303 is electrically connected with a fifth collecting end of the controller U201, and a collector electrode of the photoelectric coupler U304 is electrically connected with a sixth collecting end of the controller U201.
2. The closing detection circuit for the drop-out fuse as claimed in claim 1, wherein the input terminal of the transformer T300 is connected to the first input terminal through a resistor R350, a resistor R300 is connected between the negative input terminal and the output terminal of the operational amplifier U300B, two ends of the resistor R300 are connected in parallel to a capacitor C300, the output terminal of the operational amplifier U300B is electrically connected to the connection terminal of the controller U201 through a resistor R301, and one end of the resistor R301 away from the operational amplifier U300B is further grounded through a capacitor C302;
the input end of the transformer T301 is connected to the second input end through a resistor R351, a resistor R302 is connected between the negative input end and the output end of the operational amplifier U300A, two ends of the resistor R302 are connected in parallel with a capacitor C303, the output end of the operational amplifier U300A is electrically connected to the connection end of the controller U201 through a resistor R305, and one end of the resistor R305, which is far away from the operational amplifier U300A, is also grounded through a capacitor C304;
the input end of the transformer T302 is connected to the third input end through a resistor R352, a resistor R311 is connected between the negative input end and the output end of the operational amplifier U301A, two ends of the resistor R311 are connected in parallel with a capacitor C306, the output end of the operational amplifier U301A is electrically connected to the connection end of the controller U201 through a resistor R313, and one end of the resistor R313 far away from the operational amplifier U301A is also grounded through a capacitor C308.
3. The closing detection circuit for the drop-out fuse according to claim 2, wherein the collector of the photocoupler U302 is further connected to a power supply terminal through a resistor R317, and two ends of the resistor R317 are connected in parallel to a resistor R438 and a light emitting diode D409 which are connected in series;
the collector of the photoelectric coupler U303 is also connected with a power supply end through a resistor R319, and two ends of the resistor R319 are connected with a resistor R439 and a light emitting diode D410 which are connected in series in parallel;
the collector of the photocoupler U304 is also connected with a power supply end through a resistor R321, and two ends of the resistor R321 are connected with a resistor R440 and a light emitting diode D411 which are connected in series in parallel.
4. The closing detection circuit for the drop-out fuse according to claim 3, wherein the closing detection circuit for the drop-out fuse further comprises a power circuit, and the power circuit is electrically connected with the control circuit, the voltage sampling circuit, the signal conditioning circuit and the closing in-place sampling circuit respectively.
5. The closing detection circuit for the drop-out fuse as recited in claim 4, wherein the anode of the photocoupler U302 is connected to the power supply terminal through a resistor R316, the anode of the photocoupler U303 is connected to the power supply terminal through a resistor R318, and the anode of the photocoupler U304 is connected to the power supply terminal through a resistor R320.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221278810.XU CN217954709U (en) | 2022-05-25 | 2022-05-25 | Closing detection circuit for drop-out fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221278810.XU CN217954709U (en) | 2022-05-25 | 2022-05-25 | Closing detection circuit for drop-out fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217954709U true CN217954709U (en) | 2022-12-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221278810.XU Expired - Fee Related CN217954709U (en) | 2022-05-25 | 2022-05-25 | Closing detection circuit for drop-out fuse |
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| Country | Link |
|---|---|
| CN (1) | CN217954709U (en) |
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2022
- 2022-05-25 CN CN202221278810.XU patent/CN217954709U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| 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: 20221202 |