Fault alarm device for current transformer

Abstract

The invention relates to the technical field of mutual inductor detection, and particularly discloses a current transformer fault alarm device, which comprises a current transformer body and an alarm, and is characterized in that when the current transformer body is abnormal, the current transformer body can shake, and a driving mechanism in the alarm can be driven to work under the shaking condition, so that the current transformer body is prevented from being damaged. The driving mechanism is used for driving the striking mechanism to strike the alarm bell, so that a sound is made to attract a worker, mechanical alarm can be realized through synchronous transmission of the driving mechanism and the striking mechanism, and misjudgment and other conditions in a strong electromagnetic environment can be avoided through mechanical alarm. Moreover, the work of the alarm is not affected by the temperature and humidity of the environment, and meanwhile, the later maintenance is facilitated, and the maintenance cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of transformer detection, in particular to a current transformer fault alarm device. Background Art

[0002] Current transformers are indispensable and important equipment in power systems, and their normal operation is crucial for power measurement, protection and control.

[0003] However, due to long-term operation in high voltage and high current environments, current transformers may experience faults such as insulation aging and winding short circuits. Once a fault occurs, if it is not discovered and handled in time, it may cause serious power accidents, resulting in huge economic losses and social impacts.

[0004] In the existing technology, current transformer fault detection methods mainly rely on electronic sensors and complex monitoring systems. Although these systems can provide relatively accurate fault information, they have some shortcomings. For example, electronic sensors are prone to misjudgment in strong electromagnetic interference environments, and the system costs are high and maintenance is complex. In addition, the reliability of electronic components is also affected by factors such as ambient temperature and humidity, and may not work normally under some harsh working conditions. Summary of the Invention

[0005] The purpose of the present invention is to provide a current transformer fault alarm device to solve the following technical problems:

[0006] (1) How to develop an alarm device with simple structure and high reliability.

[0007] The purpose of the present invention can be achieved through the following technical solutions:

[0008] A current transformer fault alarm device includes a current transformer body and an alarm, and further includes:

[0009] An alarm bell, arranged inside the alarm;

[0010] A blocking mechanism is provided in the alarm and is connected to the alarm bell;

[0011] A driving mechanism is arranged in the alarm;

[0012] The striking mechanism is arranged on one side of the driving mechanism and is driven to work by the driving mechanism.

[0013] Furthermore, the driving mechanism includes a driving warehouse and a driving ruler; the driving ruler is slidably arranged in the driving warehouse and passes through the driving warehouse; a sliding groove is provided on the side wall of the driving warehouse; a slider is fixedly connected to the side wall of the driving ruler; the slider is slidably connected in the sliding groove; teeth are provided on both sides of the driving ruler; an end of the driving ruler away from the teeth is fixedly connected to a reciprocating spring; an end of the reciprocating spring away from the driving ruler is fixedly connected to the bottom of the driving warehouse; the side wall of the driving warehouse is rotatably connected to gear 1; gear 2 is rotatably provided on both sides of gear 1; gear 2 is meshed with gear 1; a half gear is fixedly connected to gear 2; the half gear is movably meshed with the teeth; an end of the driving ruler away from the teeth abuts against the end of the current transformer body;

[0014] The driving mechanism comprises a first gear wheel, a second gear wheel, and a second gear wheel of the gear train is engaged with the first gear and the gear train is connected with the first gear of the gear train.

[0015] Furthermore, the gear 1 is smaller than the gear 2; and the half gears are mirror-imaged on both sides of the driving ruler.

[0016] Furthermore, the blocking mechanism includes a blocking plate; a limiting block is fixedly connected to the blocking plate; a limiting slot is provided on the top of the alarm; the limiting block is clamped in the limiting slot and slidably set in the limiting slot; the bottom of the blocking plate is fixedly connected to the alarm bell; a fixing spring is fixedly connected to the middle of the blocking plate; the fixing spring is fixedly connected to the fixing block at one end away from the blocking plate; a slot is provided on the top of the alarm; the size of the fixing block is consistent with the slot; a telescopic spring is fixedly connected to the side wall of the alarm; the end of the telescopic spring away from the alarm is fixedly connected to the blocking plate; a pull rod is fixedly connected to the side wall of the blocking plate; the pull rod extends out of the alarm setting.

[0017] Furthermore, two groups of blocking plates are provided; and the fixing blocks and fixing springs are provided separately.

[0018] Furthermore, the side wall of the alarm is provided with sound holes; and two groups of sound holes are provided.

[0019] Furthermore, the driving ruler is arranged above the first gear and parallel to the half gear.

[0020] Furthermore, the current transformer body model is LMZJ1-0.5 current transformer.

[0021] Beneficial effects of the present invention:

[0022] (1) In the present invention, when an abnormality occurs in the current transformer body, it will vibrate. In the case of vibration, it will drive the driving mechanism in the alarm to work, thereby using the driving mechanism to drive the striking mechanism to strike the alarm bell, thereby making a sound to attract staff. When the staff finds the abnormality, they first use the blocking mechanism to drive the alarm bell away from the striking mechanism to turn off the bell, and then repair the distribution cabinet and the current transformer body. Through the synchronous transmission of the driving mechanism and the striking mechanism, a mechanized alarm can be realized. Through the mechanized alarm, misjudgment and the like caused by a strong electromagnetic environment can be avoided, and the operation of the alarm will not be affected by the temperature and humidity of the environment. At the same time, it is convenient for later maintenance and reduces maintenance costs.

[0023] (2) The present invention uses mechanical drive to detect abnormal vibration of the current transformer body, drive the large gear to rotate with the driving ruler, and then trigger the alarm bell with the striking disk and striking head. This can avoid misjudgment of the sensor due to electromagnetic fields, thereby improving the accuracy of the alarm and making it easier for staff to carry out maintenance in the first place.

[0024] (3) The present invention utilizes a pull rod to pull the blocking plate inside the alarm to move. When the blocking plate is pulled, the alarm bell will be driven away from the striking disk, so that the striking head on the striking disk cannot strike the alarm bell. At the same time, the fixed block provided in the blocking plate will be pulled to the card slot. When it reaches the card slot, the fixed spring rebounds and bounces the fixed block into the card slot, thereby achieving the fixation of the blocking plate. When the maintenance is completed, the staff manually presses the fixed block and presses the fixed block out of the card slot, so that the fixed block loses the card connection of the card slot. After the card connection is lost, the telescopic spring on one side of the blocking plate rebounds and bounces the blocking plate and the alarm bell back to the top of the striking disk, and then performs the early warning work. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] Figure 1 It is a schematic diagram of the overall structure of the alarm in the present invention;

[0027] Figure 2 It is a front view of the overall structure of the striking mechanism of the present invention;

[0028] Figure 3 It is a schematic diagram of the overall structure of the striking mechanism of the present invention;

[0029] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0030] Figure 5 It is a schematic diagram of the overall structure of the driving mechanism of the present invention;

[0031] Figure 6 It is a schematic diagram of the overall structure of the half gear in the present invention;

[0032] Figure 7 It is a partial structural cross-sectional view of the alarm in the present invention;

[0033] Figure 8 yes Figure 7 Enlarged view of point B in the middle;

[0034] Figure 9 It is a schematic diagram of the overall structure of the blocking structure in the present invention.

[0035] Description of the drawings: 1. Current transformer body; 2. Alarm; 21. Sound outlet; 22. Slot; 23. Limiting slot; 3. Blocking mechanism; 31. Blocking plate; 32. Fixing spring; 33. Fixing block; 34. Pull rod; 35. Telescopic spring; 36. Alarm bell; 37. Limiting block; 4. Driving mechanism; 41. Driving compartment; 42. Slide; 43. Driving ruler; 431. Slider; 432. Tooth; 44 , reciprocating spring; 45, gear one; 46, gear two; 461, half gear; 5, striking mechanism; 51, connecting shaft; 52, large gear; 53, small gear; 531, driving connecting rod; 532, connecting pin; 54, connecting arm; 541, connecting column one; 542, connecting column two; 55, reciprocating disk; 551, rocker arm; 552, snap pin; 553, sliding arm; 56, striking disk; 561, striking head. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] See also Figures 1-9 As shown, the present application provides a current transformer fault alarm device, comprising a current transformer body 1 and an alarm 2, characterized in that it also includes:

[0038] An alarm bell 36 is provided inside the alarm device 2;

[0039] The blocking mechanism 3 is provided in the alarm 2 and is connected to the alarm bell 36;

[0040] A driving mechanism 4 is provided in the alarm 2;

[0041] The striking mechanism 5 is arranged on one side of the driving mechanism 4 and is driven by the driving mechanism 4;

[0042] During operation, in the prior art, the current transformer fault detection method mainly relies on electronic sensors and complex monitoring systems. Although these systems can provide relatively accurate fault information, they have some shortcomings. For example, electronic sensors are prone to misjudgment in a strong electromagnetic interference environment, and the system cost is high and maintenance is complicated. In addition, the reliability of electronic components is also affected by factors such as ambient temperature and humidity. Under some harsh working conditions, they may not work properly. In order to prevent such incidents from happening, the current transformer body 1 is generally installed in the distribution cabinet for protection and detection. First, the alarm 2 in the present invention is installed inside the distribution cabinet by fixing screws, and ensure that the driving mechanism 4 in the alarm 2 can contact with the current transformer body 1. When the current transformer When an abnormality occurs in the sensor body 1, it will vibrate. The vibration will drive the driving mechanism 4 in the alarm 2 to work, thereby using the driving mechanism 4 to drive the striking mechanism 5 to strike the alarm bell 36, thereby making a sound to attract staff. When the staff finds the abnormality, they first use the blocking mechanism 3 to drive the alarm bell 36 away from the striking mechanism 5 to turn off the bell, and then repair the distribution cabinet and the current transformer body 1. Through the synchronous transmission of the driving mechanism 4 and the striking mechanism 5, a mechanized alarm can be realized. Through the mechanized alarm, misjudgment and the like caused by a strong electromagnetic environment can be avoided, and the operation of the alarm 2 will not be affected by the temperature and humidity of the environment. At the same time, it is also convenient for later maintenance and reduces maintenance costs.

[0043] like Figure 2-Figure 6The cam 43 is provided with a plurality of teeth 432 on the cam 43, and the plurality of teeth 432 on the cam 43 are provided with a plurality of teeth 433 on the cam 43.

[0044] The striking mechanism 5 includes a large gear 52 and a small gear 53; the side wall of the drive chamber 41 is rotatably connected to a connecting shaft 51; the input end of the connecting shaft 51 is fixedly connected to the output end of gear 1 45; the end of the connecting shaft 51 away from the drive chamber 41 is fixedly connected to the large gear 52; the small gear 53 is rotatably set on the side of the large gear 52; the large gear 52 and the small gear 53 are meshed and connected; the side wall of the drive chamber 41 is fixedly connected to a connecting arm 54; a connecting column 1 541 and a connecting column 2 542 are rotatably connected to the connecting arm 54; the end of the connecting column 1 541 away from the connecting arm 54 is fixedly connected to a reciprocating disk 55; the middle of the reciprocating disk 55 is fixedly connected to a rocker arm 551; the rocker arm 551 is provided with two groups; a snap-on pin 552 is fixedly connected to the rocker arm 551; a sliding arm 553 is fixedly connected to the side wall of the reciprocating disk 55; a driving connecting rod 531 is rotatably connected to the pinion 53; the driving connecting rod 531 is rotatably connected to the connecting pin 532 at one end away from the pinion 53; the driving connecting rod 531 is clamped in the sliding arm 553 via the connecting pin 532; the end of the second connecting column 542 away from the connecting arm 54 is fixedly connected to the striking disk 56; the reciprocating disk 55 and the rocker arm 551 are arranged in the striking disk 56; striking heads 561 are fixedly connected at both ends of the striking disk 56; the alarm bell 36 is arranged at both ends of the striking disk 56;

[0045] During operation, when installing the alarm 2, it is necessary to ensure that the driving ruler 43 at the bottom of the driving compartment 41 in the alarm 2 is in contact with the current transformer body 1, and the driving ruler 43 runs through the driving compartment 41, and one end of the reciprocating spring 44 is connected to the driving ruler 43, and the other end is connected to the driving compartment 41. The contact part between the driving ruler 43 and the current transformer body 1 is close to the reciprocating spring 44. When the current transformer body 1 vibrates abnormally, the driving ruler 43 and the reciprocating spring 44 will be squeezed, and the vibration is generally linear, thereby causing the driving ruler 43 to move linearly. During the movement, The teeth 432 on the driving ruler 43 drive the half gear 461 on the two sets of gear 2 46 to rotate, thereby driving gear 2 46 to rotate, and then driving gear 1 45 to rotate through gear 2 46. At the same time, due to the characteristics of the spring, after the driving force of the vibration is lost, the spring will drive the driving ruler 43 to move back. When moving back, the teeth 432 on the driving ruler 43 will drive the half gear 461 to rotate again, thereby continuously driving gear 1 45 to rotate. When gear 1 45 rotates, it will drive the external connecting shaft 51 to rotate, thereby using the large gear 52 to drive the small gear 53 to rotate. The gears 53 and 53 are different in size. When the large gear 52 rotates, it drives the small gear 53 to rotate multiple times. When shaking occurs, the driving connecting rod 531 is driven to rotate through the small gear 53. The small gear 53 is not arranged parallel to the large gear 52, which facilitates the rotation of the driving connecting rod 531. The driving connecting rod 531 is connected to the sliding arm 553 on the reciprocating disk 55 through the connecting pin 532. When the driving connecting rod 531 rotates, the reciprocating disk 55 is driven to move up and down through the sliding arm 553, thereby driving the two sets of rocker arms 551 on the reciprocating disk 55 to move in the striking disk 56. Due to the special shape of the striking disk 56, the rocker arms When 551 moves up and down, it can be stuck in the striking plate 56, thereby driving the striking plate 56 to move up and down. At the same time, the alarm bell 36 is set on the upper and lower sides of the striking plate 56. When moving up and down, the striking head 561 is used to hit the alarm bell 36 to make a sound. From the abnormal shaking of the current transformer body 1, to the driving ruler 43 driving the large gear 52 to rotate, and then to the striking plate 56 and the striking head 561 triggering the alarm bell 36, all are mechanically driven, which can avoid the sensor from misjudging due to the electromagnetic field, thereby improving the accuracy of the alarm and making it convenient for the staff to carry out maintenance at the first time.

[0046] like Figure 6 As shown, the gear 1 45 is smaller than the gear 2 46; the half gear 461 is mirror-imaged on both sides of the driving ruler 43;

[0047] During operation, gear 1 45 is smaller in size. When gear 2 46 rotates, it can drive gear 1 45 to rotate multiple times. At the same time, half gears 461 are provided on both sides of the driving ruler 43, and when the half gears 461 are driven to rotate, they will drive gear 2 46 to rotate, and then drive gear 1 45 to rotate. When gear 1 45 rotates, it will drive gear 2 46 on the other side to rotate, thereby driving the upper half gear 461 to rotate to the teeth 432 of the driving ruler 43, and then drive the other set of half gears 461 to rotate when the driving ruler 43 reciprocates. When the half gears 461 on both sides are repeatedly driven to rotate, gear 1 45 can be driven to rotate, thereby driving the large gear 52 to rotate.

[0048] like Figure 7-Figure 9 As shown, the blocking mechanism 3 includes a blocking plate 31; a limiting block 37 is fixedly connected to the blocking plate 31; a limiting slot 23 is provided on the top of the alarm 2; the limiting block 37 is engaged with the limiting slot 23 and slidably set in the limiting slot 23; the bottom of the blocking plate 31 is fixedly connected to the alarm bell 36; the middle of the blocking plate 31 is fixedly connected to a fixing spring 32; the end of the fixing spring 32 away from the blocking plate 31 is fixedly connected to the fixing block 33; the top of the alarm 2 is provided with a slot 22; the size of the fixing block 33 is consistent with the slot 22; the side wall of the alarm 2 is fixedly connected to a telescopic spring 35; the end of the telescopic spring 35 away from the alarm 2 is fixedly connected to the blocking plate 31; the side wall of the blocking plate 31 is fixedly connected to a pull rod 34; the pull rod 34 extends out of the alarm 2;

[0049] During operation, the alarm bell 36 is arranged above and below the striking disk 56 via the blocking plate 31. When the current transformer body 1 fails and shakes, the striking disk 56 will be used to strike the alarm bell 36, thereby generating a sound to issue a warning. When the staff comes to maintain, they first need to cancel the sound to avoid affecting subsequent maintenance. First, the staff pulls the pull rod 34 on one side of the alarm 2, and uses the pull rod 34 to pull the blocking plate 31 inside the alarm 2 to move. When the blocking plate 31 is pulled, it will drive the alarm bell 36 away from the striking disk 56, so that the striking head 561 on the striking disk 56 cannot strike the alarm bell 36. At the same time, the fixing block 33 set in the blocking plate 31 When the locking plate 56 is unlocked, the locking plate 51 is unlocked and the locking plate 52 is unlocked. When the locking plate 51 is unlocked, the locking plate 51 is unlocked and the locking plate 52 is unlocked. When the locking plate 51 is unlocked, the locking plate 51 is unlocked and the locking plate 52 is unlocked. When the locking plate 51 is unlocked, the locking plate 51 is unlocked and the locking plate 52 is unlocked. When the locking plate 51 is unlocked, the locking plate 51 is unlocked and the locking plate 52 is unlocked.

[0050] like Figure 7 As shown, the blocking plates 31 are provided in two groups; the fixing blocks 33 and the fixing springs 32 are provided separately;

[0051] During operation, since there are two groups of alarm bells 36, there are also two groups of blocking plates 31, but the fixing block 33 and the card slot 22 on the alarm 2 are set in one group, that is, they are set above the alarm 2, and there is no card slot 22 and fixing block 33 below. When the pull rod 34 is pulled, the two groups of blocking plates 31 can be driven to move at the same time, and when clamping, only the upper part needs to be clamped in place.

[0052] like Figure 1 As shown, the side wall of the alarm 2 is provided with sound holes 21; the sound holes 21 are provided with two groups;

[0053] During operation, the sound of the alarm bell 36 can be amplified through the sound outlet 21 .

[0054] like Figure 5 As shown, the driving ruler 43 is arranged above the gear 1 45 and is arranged parallel to the half gear 461;

[0055] During operation, the driving ruler 43 is arranged parallel to and meshes with the half gear 461, thereby driving the gear 1 45 to rotate.

[0056] like Figure 6 As shown, the current transformer body 1 is a LMZJ1-0.5 current transformer;

[0057] During operation, the present invention uses LMZJ1-0.5 current transformer as an example, and the alarm device 2 can be used not only for this type of transformer but also for the same type of transformer, and it is only necessary to contact the driving ruler 43 with the transformer.

[0058] Working principle of the present invention: When installing the alarm 2, it is necessary to ensure that the driving ruler 43 at the bottom of the driving compartment 41 in the alarm 2 is in contact with the current transformer body 1, and the driving ruler 43 runs through the driving compartment 41, and one end of the reciprocating spring 44 is connected to the driving ruler 43, and the other end is connected to the driving compartment 41. The contact part of the driving ruler 43 with the current transformer body 1 is close to the reciprocating spring 44. When the current transformer body 1 vibrates abnormally, it will squeeze the driving ruler 43 and the reciprocating spring 44, and the vibration is generally linear, thereby causing the driving ruler 43 to move linearly. During the movement, the teeth 432 on the driving ruler 43 will drive the half gear 461 on the two sets of gear 2 46 to rotate, thereby driving the gear 2 46 to rotate, and then driving the gear 1 45 to rotate through the gear 2 46. At the same time, due to the characteristics of the spring, after the driving force of the vibration is lost, the spring will drive the driving ruler 43 to move back. When moving back, the teeth 432 on the driving ruler 43 will drive the half gear 461 to rotate again, thereby continuously driving the gear 1 45 to rotate. When the gear 1 45 rotates, it will drive the external connecting shaft 51 to rotate, thereby utilizing the large The gear 52 drives the small gear 53 to rotate. Due to the different sizes of the large gear 52, when the large gear 52 rotates, it drives the small gear 53 to rotate multiple circles. Therefore, when shaking occurs, the small gear 53 drives the driving connecting rod 531 to rotate. The driving connecting rod 531 is engaged with the sliding arm 553 on the reciprocating plate 55 through the connecting pin 532. When the driving connecting rod 531 rotates, the sliding arm 553 drives the reciprocating plate 55 to move up and down, thereby driving the two sets of rocker arms 551 on the reciprocating plate 55 to move in the striking plate 56. Due to the special shape of the striking plate 56, the rocker arms 551 move up and down. When it moves, it can be stuck in the striking plate 56, thereby driving the striking plate 56 to move up and down. At the same time, the alarm bell 36 is set on the upper and lower sides of the striking plate 56. When moving up and down, the striking head 561 is used to hit the alarm bell 36 to make a sound. From the abnormal shaking of the current transformer body 1, to the driving ruler 43 driving the large gear 52 to rotate, and then to the striking plate 56 and the striking head 561 triggering the alarm bell 36, they are all mechanically driven, which can avoid the sensor from misjudging due to the electromagnetic field, thereby improving the accuracy of the alarm and making it convenient for the staff to carry out maintenance at the first time.

[0059] Among them, the alarm bell 36 is set above and below the striking disk 56 through the blocking plate 31. When the current transformer body 1 fails and shakes, the striking disk 56 will be used to strike the alarm bell 36, thereby generating a sound to issue a warning. When the staff comes to maintain, they first need to cancel the sound to avoid affecting subsequent maintenance. First, the staff pulls the pull rod 34 on one side of the alarm 2, and uses the pull rod 34 to pull the blocking plate 31 inside the alarm 2 to move. When the blocking plate 31 is pulled, it will drive the alarm bell 36 away from the striking disk 56, so that the striking head 561 on the striking disk 56 cannot strike the alarm bell 36. At the same time, the fixed block 33 set in the blocking plate 31 When the locking plate 56 is unlocked, the locking plate 51 is unlocked and the locking plate 52 is unlocked. When the locking plate 51 is unlocked, the locking plate 51 is unlocked and the locking plate 52 is unlocked. When the locking plate 51 is unlocked, the locking plate 51 is unlocked and the locking plate 52 is unlocked. When the locking plate 51 is unlocked, the locking plate 51 is unlocked and the locking plate 52 is unlocked. When the locking plate 51 is unlocked, the locking plate 51 is unlocked and the locking plate 52 is unlocked.

[0060] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A current transformer fault alarm device, comprising a current transformer body (1) and an alarm (2), characterized in that: Also includes: An alarm bell (36) is provided inside the alarm device (2); A blocking mechanism (3) is provided in the alarm (2) and is connected to the alarm bell (36); A driving mechanism (4) is arranged in the alarm (2); The striking mechanism (5) is arranged on one side of the driving mechanism (4) and is driven to work by the driving mechanism (4).

2. A current transformer fault alarm device according to claim 1, characterized in that: The driving mechanism (4) comprises a driving chamber (41) and a driving ruler (43); the driving ruler (43) is slidably arranged in the driving chamber (41) and is arranged through the driving chamber (41); a sliding groove (42) is provided on the side wall of the driving chamber (41); a slider (431) is fixedly connected to the side wall of the driving ruler (43); the slider (431) is slidably connected in the sliding groove (42); teeth (432) are provided on both sides of the driving ruler (43); a reciprocating spring (44) is fixedly connected to the end of the driving ruler (43) away from the teeth (432); One end of the reciprocating spring (44) away from the driving ruler (43) is fixedly connected to the bottom of the driving chamber (41); the side wall of the driving chamber (41) is rotatably connected to a gear 1 (45); gear 2 (46) is rotatably provided on both sides of the gear 1 (45); the gear 2 (46) is meshed with the gear 1 (45); a half gear (461) is fixedly connected to the gear 2 (46); the half gear (461) is movably meshed with the teeth (432); the end of the driving ruler (43) away from the teeth (432) is in contact with the end of the current transformer body (1); The striking mechanism (5) comprises a large gear (52) and a small gear (53); the side wall of the driving chamber (41) is rotatably connected to a connecting shaft (51); the input end of the connecting shaft (51) is fixedly connected to the output end of the gear 1 (45); the end of the connecting shaft (51) away from the driving chamber (41) is fixedly connected to the large gear (52); the small gear (53) is rotatably arranged on the side of the large gear (52); the large gear (52) and the small gear (53) are meshed and connected; the side wall of the driving chamber (41) is fixedly connected to a connecting arm (54); a connecting column 1 (541) and a connecting column 2 (542) are rotatably connected to the connecting arm (54); the end of the connecting column 1 (541) away from the connecting arm (54) is fixedly connected to a reciprocating disk (55); the middle part of the reciprocating disk (55) is fixedly connected to a rocker arm ( 551); the rocker arm (551) is provided with two groups; the rocker arm (551) is fixedly connected with a snap-in pin (552); the side wall of the reciprocating disk (55) is fixedly connected with a sliding arm (553); the pinion (53) is rotatably connected with a driving connecting rod (531); the end of the driving connecting rod (531) away from the pinion (53) is rotatably connected with a connecting pin (532); the driving connecting rod (531) is snapped into the sliding arm (553) via the connecting pin (532); the end of the second connecting column (542) away from the connecting arm (54) is fixedly connected with a striking disk (56); the reciprocating disk (55) and the rocker arm (551) are arranged in the striking disk (56); the two ends of the striking disk (56) are fixedly connected with striking heads (561); the alarm bell (36) is arranged at both ends of the striking disk (56).

3. A current transformer fault alarm device according to claim 2, characterized in that: The gear 1 (45) is smaller than the gear 2 (46); the half gear (461) is mirror-imaged and arranged on both sides of the driving ruler (43).

4. A current transformer fault alarm device according to claim 3, characterized in that: The blocking mechanism (3) comprises a blocking plate (31); a limiting block (37) is fixedly connected to the blocking plate (31); a limiting groove (23) is provided on the top of the alarm (2); the limiting block (37) is engaged with the limiting groove (23) and is slidably arranged in the limiting groove (23); the bottom of the blocking plate (31) is fixedly connected to the alarm bell (36); a fixing spring (32) is fixedly connected to the middle of the blocking plate (31); the fixing spring (32) is away from the blocking plate One end of the (31) is fixedly connected to a fixing block (33); a slot (22) is provided on the top of the alarm (2); the size of the fixing block (33) is consistent with the slot (22); a telescopic spring (35) is fixedly connected to the side wall of the alarm (2); the end of the telescopic spring (35) away from the alarm (2) is fixedly connected to the blocking plate (31); a pull rod (34) is fixedly connected to the side wall of the blocking plate (31); the pull rod (34) is extended out of the alarm (2).

5. A current transformer fault alarm device according to claim 4, characterized in that: The blocking plates (31) are provided in two groups; the fixing blocks (33) and the fixing springs (32) are provided separately.

6. A current transformer fault alarm device according to claim 5, characterized in that: The side wall of the alarm (2) is provided with sound holes (21); two groups of the sound holes (21) are provided.

7. A current transformer fault alarm device according to claim 6, characterized in that: The driving ruler (43) is arranged above the gear 1 (45) and is arranged parallel to the half gear (461).

8. A current transformer fault alarm device according to claim 7, characterized in that: The current transformer body (1) is of the LMZJ1-0.5 type.

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