CN209804429U - Voltage transformer capable of preventing short circuit damage - Google Patents
Voltage transformer capable of preventing short circuit damage Download PDFInfo
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- CN209804429U CN209804429U CN201920697136.0U CN201920697136U CN209804429U CN 209804429 U CN209804429 U CN 209804429U CN 201920697136 U CN201920697136 U CN 201920697136U CN 209804429 U CN209804429 U CN 209804429U
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Abstract
The utility model relates to a prevent voltage transformer of short circuit damage, including shell, first iron core, alarm mechanism, primary winding, secondary winding, slide rheostat, fuse and wiring end, alarm mechanism includes second iron core, iron plate, spring, battery case, bee calling organ, alarm lamp and two trigger assembly, trigger assembly includes riser and diaphragm, and the short circuit fault equipment that takes place when this prevent voltage transformer of short circuit damage utilizes the fuse to prevent to detect voltage damages, when utilizing slide rheostat to adjust the electric current through primary winding, reminds through alarm mechanism, prevents that the electric current through winding in proper order is too big and arouse the burnout of fuse, reduces the frequency that the fuse was changed, when guaranteeing voltage safety inspection, makes voltage detection more convenient to reduce the replacement cost, thereby improved the practicality of equipment.
Description
Technical Field
The utility model relates to a mutual-inductor field, in particular to prevent voltage transformer of short circuit damage.
Background
A voltage transformer, an instrument used to transform voltage on a line. The voltage transformer is mainly used for supplying power to a measuring instrument and a relay protection device, measuring the voltage, power and electric energy of a line, or protecting valuable equipment, a motor and a transformer in the line when the line fails, so that the capacity of the voltage transformer is small, generally only a few volt-amperes, dozens of volt-amperes, and maximally not more than one thousand volt-amperes.
The impedance of the voltage transformer is very small, once the secondary side is short-circuited, the current will increase rapidly and burn out the coil, therefore, the primary side of the voltage transformer is connected with the fuse, the secondary side is reliably grounded, and when the primary side and the secondary side are damaged in an insulation way, the secondary side has high potential to the ground to cause personal and equipment accidents. Although the existing voltage transformer can prevent short circuit damage through accessing the fuse, in the operation process, the fuse is easy to frequently burn and damage for protecting the operator, so that the operator needs to frequently replace the fuse, the operation is complex, the cost of voltage measurement is increased, and the practicability of the existing voltage transformer is further reduced.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: in order to overcome the defects of the prior art, the voltage transformer capable of preventing short circuit damage is provided.
The utility model provides a technical scheme that its technical problem adopted is: a voltage transformer capable of preventing short circuit damage comprises a shell, a first iron core, an alarm mechanism, a primary winding, a secondary winding, a sliding rheostat, a fuse and a wiring end, wherein a strip-shaped opening is formed in the shell, the sliding rheostat is fixed below the strip-shaped opening, the first iron core is fixed in the shell, the secondary winding is arranged on one side of the first iron core, two ends of the secondary winding are located outside the shell, one end of the primary winding is arranged outside the shell, the other end of the primary winding is connected with the sliding rheostat through one side, away from the second winding, of the first iron core and the alarm mechanism in sequence, the sliding rheostat is connected with the fuse, the fuse is fixed on the shell, and the fuse is connected with the wiring end;
Alarm mechanism includes second iron core, iron plate, spring, battery case, bee calling organ, alarm lamp and two trigger assembly, the second iron core is fixed in the shell, primary winding twines on the second iron core, primary winding distributes along the axis spiral of second iron core, iron plate is located the top of second iron core, iron plate passes through the top that the spring set up in the shell, the spring is in tensile state, and two trigger assembly are located the both sides between iron plate and the second iron core respectively, the one end of battery case is connected with one of them trigger assembly, the other end of battery case loops through bee calling organ and alarm lamp and is connected with another trigger assembly, battery case, bee calling organ and alarm lamp all fix the top at the shell.
as preferred, for the break-make of the mobile control bee calling organ through iron plate and the alarm lamp place return circuit, trigger assembly includes riser and diaphragm, the preparation material of riser and diaphragm is copper, the top of riser is fixed at the top in the shell, the bottom and the diaphragm fixed connection of riser, the small distance between two diaphragms is less than the length of iron plate, in two diaphragms, one of them diaphragm is connected with the battery case electricity, and another diaphragm is connected with the alarm lamp electricity.
Preferably, in order to reinforce the connection between the transverse plate and the vertical plate, the vertical plate and the transverse plate are of an integrally formed structure.
Preferably, in order to fix the moving direction of the iron plate, the trigger assembly further comprises a sliding ring and a sliding rod, the sliding ring is fixed on one side, close to the spring, of the vertical plate, the sliding rod is fixed above the iron plate, and the sliding ring is sleeved on the sliding rod.
Preferably, the tension spring is suitable for working environments such as high and low temperature and corrosion resistance, and in order to prolong the service life of the spring, the spring is the tension spring.
Preferably, in order to conveniently operate the slide rheostat, a frame and a sliding block are arranged above the strip-shaped opening, the frame is U-shaped, two ends of the frame are fixed above the shell, the sliding block is sleeved on the horizontal portion of the frame, and the sliding block is fixedly connected with the sliding rheostat.
the beneficial effects of the utility model are that, this prevent short circuit fault's voltage transformer utilizes the fuse to prevent that short circuit fault equipment from damaging when detecting voltage, when utilizing the current of slip rheostat regulation through primary winding, indicates through alarm mechanism, prevents that the electric current through winding in proper order is too big and arouse burning out of fuse, reduces the frequency that the fuse was changed, when guaranteeing voltage safety detection, makes voltage detection more convenient to reduce the replacement cost, thereby improved the practicality of equipment.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic structural diagram of the short-circuit damage prevention voltage transformer of the present invention;
FIG. 2 is a schematic structural diagram of the alarm mechanism of the short-circuit damage prevention voltage transformer of the present invention;
In the figure: 1. the magnetic switch comprises a shell, 2 parts of a first iron core, 3 parts of a primary winding, 4 parts of a secondary winding, 5 parts of a sliding rheostat, 6 parts of a fuse, 7 parts of a terminal, 8 parts of a second iron core, 9 parts of an iron plate, 10 parts of a spring, 11 parts of a battery box, 12 parts of an alarm lamp, 13 parts of a vertical plate, 14 parts of a transverse plate, 15 parts of a sliding ring, 16 parts of a sliding rod, 17 parts of a frame, 18 parts of a sliding block and 19 parts of a buzzer.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
as shown in FIG. 1, a voltage transformer for preventing short-circuit damage comprises a housing 1, a first iron core 2, an alarm mechanism, a primary winding 3, a secondary winding 4, a slide rheostat 5, a fuse 6 and a terminal 7, the casing 1 is provided with a strip-shaped opening, the slide rheostat 5 is fixed below the strip-shaped opening, the first iron core 2 is fixed in the casing 1, the secondary winding 4 is arranged at one side of the first iron core 2, two ends of the secondary winding 4 are both positioned outside the shell 1, one end of the primary winding 3 is arranged outside the shell 1, the other end of the primary winding 3 is connected with the slide rheostat 5 through one side of the first iron core 2 which is far away from the second winding and the alarm mechanism in sequence, the sliding rheostat 5 is characterized in that a sliding rheostat end is connected with a fuse 6, the fuse 6 is fixed on the shell 1, and the fuse 6 is connected with a terminal 7;
When the voltage transformer is used for measurement, after the sliding resistance end of the sliding rheostat 5 is moved to the end with the maximum resistance value of the sliding rheostat 5, two input ends of a secondary winding 4 at one side of a shell 1 are connected with an external voltage measuring instrument, a primary winding 3 and a terminal 7 at the other side of the shell 1 are connected with an external high-voltage cable for measurement, the primary side of a first iron core 2 is protected by a fuse 6 and the sliding rheostat 5, wherein the fuse 6 can prevent the primary winding 3 from being damaged due to overhigh temperature, the sliding rheostat 5 can reduce the current passing through the primary winding 3 by increasing the resistance value, prevent the fuse 6 from being frequently damaged and replaced due to overhigh temperature of the primary winding 3, when the current passes through the primary winding 3, alternating magnetic flux is generated at one side of the first iron core 2, and the alternating magnetic flux is conducted to the position of the secondary winding, the alternating magnetic flux is induced by the secondary winding 4, so that the voltage measuring instrument can detect the voltage at the end of the secondary winding 4 and further convert the voltage into the voltage at the end of the primary winding 3 to realize the measurement of high voltage, in order to improve the detection precision, a user can operate the sliding resistance end of the sliding rheostat 5 through the strip-shaped opening to reduce the resistance value of the sliding rheostat 5, thereby increasing the current passing through the primary winding 3, when the current is overlarge, the alarm mechanism gives an alarm prompt to prevent an operator from continuously reducing the resistance value of the sliding rheostat 5 to cause overlarge current and burn the fuse 6, therefore, through the combination of the fuse 6, the sliding rheostat 5 and the alarm mechanism, the measurement of high voltage is facilitated, the safety and reliability of the measurement operation are ensured, the occurrence of short-circuit accidents is avoided, the burning times of the fuse 6 are reduced, the complexity of the operation and the increase of the detection cost, thereby improving the practicability of the equipment.
As shown in fig. 2, the alarm mechanism includes a second iron core 8, an iron plate 9, a spring 10, a battery box 11, a buzzer 19, an alarm lamp 12 and two trigger assemblies, the second iron core 8 is fixed in the shell 1, the primary winding 3 is wound on the second iron core 8, the primary winding 3 is spirally distributed along the axis of the second iron core 8, the iron plate 9 is positioned above the second iron core 8, the iron plate 9 is arranged at the top in the shell 1 through a spring 10, the spring 10 is in a stretching state, the two trigger assemblies are respectively positioned at two sides between the iron plate 9 and the second iron core 8, one end of the battery box 11 is connected with one trigger component, the other end of the battery box 11 is connected with the other trigger component through the buzzer 19 and the alarm lamp 12 in turn, the battery box 11, the buzzer 19 and the alarm lamp 12 are all fixed above the shell 1.
When voltage detection is carried out, high voltage passes through the first winding, so that current passes through the first winding, a magnetic field is generated around the second iron core 8, the higher the passing current is, the stronger the magnetic field intensity is, when a user adjusts the resistance value of the slide rheostat 5, the current passing through the first winding is reversely changed along with the change of the resistance value of the slide rheostat 5, after the resistance value of the slide rheostat 5 is adjusted to be smaller, the current passing through the first winding is increased, the attraction force on the iron plate 9 is gradually increased, the attraction iron plate 9 moves downwards, so that the stretching length of the spring 10 is also increased, when the current is increased to a certain value, the stretching length of the spring 10 is increased to be electrically connected with the iron plate 9 and two trigger components, at the moment, the battery in the battery box 11 supplies power to the buzzer 19 and the alarm lamp 12, the buzzer 19 and the alarm lamp 12 are positioned in a power supply loop of the, buzzer 19 sends out alarm sound, and alarm lamp 12 is luminous simultaneously, warns operating personnel, and suggestion operating personnel increases the resistance of slide rheostat 5, avoids causing the increase of current through winding in proper order behind the continuation increase resistance for fuse 6 takes place to burn out the phenomenon for protective apparatus safety inspection, and then has realized the protection to fuse 6 through alarm mechanism, avoids the voltage test in-process electric current too big.
Preferably, in order to control the on-off of a loop where the buzzer 19 and the alarm lamp 12 are located through the movement of the iron plate 9, the trigger assembly comprises a vertical plate 13 and a horizontal plate 14, the vertical plate 13 and the horizontal plate 14 are made of copper, the top end of the vertical plate 13 is fixed at the top in the shell 1, the bottom end of the vertical plate 13 is fixedly connected with the horizontal plate 14, the small distance between the two horizontal plates 14 is smaller than the length of the iron plate 9, one horizontal plate 14 in the two horizontal plates 14 is electrically connected with the battery box 11, and the other horizontal plate 14 is electrically connected with the alarm lamp 12. Utilize riser 13 to fix the position of diaphragm 14, the minimum distance of two diaphragms 14 is less than the length of iron plate 9, be convenient for iron plate 9 after receiving the appeal downstream of second iron core 8, the both ends of iron plate 9 can contact with diaphragm 14, in the power supply circuit that buzzer 19 and speaker were located this moment, switch on two diaphragm 14 that separate the isolation by iron plate 9, make buzzer 19 and speaker be in the power supply circuit that switches on, send out alarm sound and the luminous suggestion of reporting to the police of alarm lamp 12 through buzzer 19.
Preferably, the vertical plate 13 and the horizontal plate 14 are integrally formed to reinforce the connection between the horizontal plate 14 and the vertical plate 13 by utilizing the stability of the integrally formed structure.
Preferably, in order to fix the moving direction of the iron plate 9, the trigger assembly further comprises a sliding ring 15 and a sliding rod 16, the sliding ring 15 is fixed on one side of the vertical plate 13 close to the spring 10, the sliding rod 16 is fixed above the iron plate 9, and the sliding ring 15 is sleeved on the sliding rod 16. The sliding ring 15 fixed on the vertical plate 13 fixes the moving direction of the sliding rod 16, the sliding rod 16 is fixedly connected with the iron plate 9, thereby fixing the moving direction of the iron plate 9, and when the deformation amount of the spring 10 changes, the iron plate 9 moves along the moving direction of the sliding ring 15.
Preferably, the tension spring is suitable for working environments such as high and low temperature and corrosion resistance, and the spring 10 is a tension spring in order to prolong the service life of the spring 10.
Preferably, in order to facilitate the operation of the sliding rheostat 5, a frame 17 and a sliding block 18 are arranged above the strip-shaped opening, the frame 17 is U-shaped, both ends of the frame 17 are fixed above the housing 1, the sliding block 18 is sleeved on the horizontal portion of the frame 17, and the sliding block 18 is fixedly connected with the sliding rheostat end of the sliding rheostat 5. The user can move on the frame 17 through the sliding block 18, and the sliding variable resistance end of the sliding variable resistor 5 is operated by the bracket to move, so that the device is more convenient to use and operate.
This voltage transformer prevents through fuse 6 that short circuit from taking place to damage among the testing process equipment, utilize slide rheostat 5 to adjust its resistance, change the electric current through first winding, be convenient for when the one side of first iron core 2 that is close to secondary winding 4 carries out voltage measurement, utilize alarm mechanism to protect equipment, when the electric current through first winding is too big, iron plate 9 contacts with two diaphragm 14 that trigger the subassembly, make buzzer 19 and speaker be in the power supply loop of the battery in battery case 11, indicate through sound production and luminous, avoid the electric current too big, reduce the number of times that fuse 6 burns out, thereby make voltage detection safer the while, it is more convenient to operate, reduce the required cost of changing fuse 6, thereby the practicality of equipment has been improved.
Compared with the prior art, this prevent short-circuit failure's voltage transformer utilizes fuse 6 to prevent that short-circuit failure equipment from damaging when detecting voltage, when utilizing slide rheostat 5 to adjust the electric current through primary winding 3, indicate through alarm mechanism, prevent that the electric current through winding in proper order is too big and arouse burning out of fuse 6, reduce the frequency that fuse 6 changed, when guaranteeing voltage safety detection, make voltage detection more convenient, and reduce the replacement cost, thereby the practicality of equipment has been improved.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (6)
1. The voltage transformer capable of preventing short circuit damage is characterized by comprising a shell (1), a first iron core (2), an alarm mechanism, a primary winding (3), a secondary winding (4), a sliding rheostat (5), a fuse (6) and a wiring end (7), wherein a strip-shaped opening is formed in the shell (1), the sliding rheostat (5) is fixed below the strip-shaped opening, the first iron core (2) is fixed in the shell (1), the secondary winding (4) is arranged on one side of the first iron core (2), two ends of the secondary winding (4) are located outside the shell (1), one end of the primary winding (3) is arranged outside the shell (1), the other end of the primary winding (3) is connected with the sliding rheostat (5) through the alarm mechanism and one side, far away from the second winding, of the first iron core (2) in sequence, the sliding rheostat (5) is characterized in that the sliding rheostat end is connected with a fuse (6), the fuse (6) is fixed on the shell (1), and the fuse (6) is connected with a terminal (7);
The alarm mechanism comprises a second iron core (8), an iron plate (9), a spring (10), a battery box (11), a buzzer (19), an alarm lamp (12) and two trigger components, wherein the second iron core (8) is fixed in the shell (1), a primary winding (3) is wound on the second iron core (8), the primary winding (3) is spirally distributed along the axis of the second iron core (8), the iron plate (9) is positioned above the second iron core (8), the iron plate (9) is arranged at the top in the shell (1) through the spring (10), the spring (10) is in a stretching state, the two trigger components are respectively positioned at two sides between the iron plate (9) and the second iron core (8), one end of the battery box (11) is connected with one of the trigger components, the other end of the battery box (11) is connected with the other trigger component through the buzzer (19) and the alarm lamp (12) in sequence, the battery box (11), the buzzer (19) and the alarm lamp (12) are all fixed above the shell (1).
2. The voltage transformer capable of preventing short circuit damage of claim 1, wherein the trigger assembly comprises a vertical plate (13) and a horizontal plate (14), the vertical plate (13) and the horizontal plate (14) are made of copper, the top end of the vertical plate (13) is fixed on the top of the inside of the shell (1), the bottom end of the vertical plate (13) is fixedly connected with the horizontal plate (14), the small distance between the two horizontal plates (14) is smaller than the length of the iron plate (9), one horizontal plate (14) of the two horizontal plates (14) is electrically connected with the battery box (11), and the other horizontal plate (14) is electrically connected with the alarm lamp (12).
3. The short-circuit damage prevention voltage transformer according to claim 2, characterized in that the vertical plates (13) and the transverse plates (14) are of an integrally formed structure.
4. The short-circuit damage prevention voltage transformer according to claim 2, characterized in that the trigger assembly further comprises a sliding ring (15) and a sliding rod (16), the sliding ring (15) is fixed on one side of the riser (13) close to the spring (10), the sliding rod (16) is fixed above the iron plate (9), and the sliding ring (15) is sleeved on the sliding rod (16).
5. The short-circuit damage prevention voltage transformer according to claim 1, characterized in that the spring (10) is a tension spring.
6. The voltage transformer capable of preventing short circuit damage according to claim 1, wherein a frame (17) and a sliding block (18) are arranged above the strip-shaped opening, the frame (17) is U-shaped, two ends of the frame (17) are fixed above the shell (1), the sliding block (18) is sleeved on the horizontal portion of the frame (17), and the sliding block (18) is fixedly connected with the sliding rheostat (5) sliding rheostat end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920697136.0U CN209804429U (en) | 2019-05-15 | 2019-05-15 | Voltage transformer capable of preventing short circuit damage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920697136.0U CN209804429U (en) | 2019-05-15 | 2019-05-15 | Voltage transformer capable of preventing short circuit damage |
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| Publication Number | Publication Date |
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| CN209804429U true CN209804429U (en) | 2019-12-17 |
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| CN201920697136.0U Active CN209804429U (en) | 2019-05-15 | 2019-05-15 | Voltage transformer capable of preventing short circuit damage |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111796162A (en) * | 2020-06-24 | 2020-10-20 | 国网浙江平湖市供电有限公司 | Visual distribution network fault studying and judging system |
| CN113281558A (en) * | 2021-04-20 | 2021-08-20 | 国网新疆电力有限公司昌吉供电公司 | Distribution network overvoltage detection alarm device |
-
2019
- 2019-05-15 CN CN201920697136.0U patent/CN209804429U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111796162A (en) * | 2020-06-24 | 2020-10-20 | 国网浙江平湖市供电有限公司 | Visual distribution network fault studying and judging system |
| CN113281558A (en) * | 2021-04-20 | 2021-08-20 | 国网新疆电力有限公司昌吉供电公司 | Distribution network overvoltage detection alarm device |
| CN113281558B (en) * | 2021-04-20 | 2023-09-05 | 国网新疆电力有限公司昌吉供电公司 | Overvoltage detection alarm device for power distribution network |
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