Drop-type fusion tube type PT (potential transformer) blocker

Abstract

The utility model discloses a drop type fusion tube type PT (potential transformer) interrupter, which relates to the technical field of electric power operation, comprises an upper moving contact and a lower moving contact, and is characterized in that a first bolt is arranged at the lower end of the upper moving contact, a positioning nut is arranged on the first bolt, an intelligent interrupting module and a drop type component are arranged between the upper moving contact and the lower moving contact, and the drop type component is connected with the intelligent interrupting module. The intelligent blocking module is detachably connected with the falling type assembly, the first bolt is movably connected with the intelligent blocking module, and the direction of the auxiliary ring can be conveniently adjusted, and the nut can be conveniently mounted and dismounted.

Description

Technical Field

[0001] The utility model relates to the technical field of power operation, in particular to a drop - type fuse - tube type PT blocker. Background Art

[0002] A potential transformer (referred to as PT hereinafter) is a very important device on a power line. When a fault occurs in a distribution network overhead line, a high - voltage test is often carried out on the overhead line or the fault is located by an insulation megger or an AC / DC fault detector (collectively referred to as a fault detector hereinafter). Due to the characteristic of the PT primary side to isolate AC and conduct DC, the DC high voltage will be directly short - circuited to the ground through the neutral point or penetrate into the adjacent phase, resulting in the inability of the fault detector to boost the voltage normally, thus affecting the fault troubleshooting. Therefore, in order to ensure the normal progress of the fault troubleshooting of the distribution network overhead line, it is necessary to manually disconnect the PTs at both ends of the fault line that are far apart, and manual switching on and off takes a lot of time.

[0003] In the existing device, its lower moving contact, fuse - tube and auxiliary ring need to be located in the same plane, and the lower moving contact and the auxiliary ring are respectively located on both sides of the fuse - tube. However, it is very difficult to make the lower moving contact, fuse - tube and auxiliary ring in the same plane through simple threaded connection, and the nut is relatively inconvenient during installation and disassembly. Content of the Utility Model

[0004] Aiming at the above deficiencies, the utility model provides a drop - type fuse - tube type PT blocker, which can facilitate the adjustment of the direction of the auxiliary ring and the installation and disassembly of the nut.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] The drop - type fuse - tube type PT blocker includes an upper moving contact and a lower moving contact. A first bolt is provided at the lower end of the upper moving contact, and a positioning nut is provided on the first bolt. An intelligent blocking module and a drop - type component are provided between the upper moving contact and the lower moving contact. The intelligent blocking module is detachably connected to the drop - type component, and the first bolt is movably connected to the intelligent blocking module.

[0007] Through the above scheme, the intelligent blocking module and the drop - type component together have the same size and installation method as the original drop - type fuse - tube, and do not change the original function of the fuse - tube. The intelligent blocking module can conduct the main network AC high voltage and automatically block the DC high voltage. Therefore, the fuse can be directly connected to the intelligent blocking module.

[0008] Further, an auxiliary ring is provided on one side of the upper moving contact.

[0009] Through the above further scheme, the direction of the auxiliary ring can be adjusted by the positioning nut.

[0010] Further, internal threads are provided at both ends of the intelligent blocking module. One end of the internal thread of the intelligent blocking module is threadedly connected to the first bolt, and the positioning nut is located between the upper moving contact and the intelligent blocking module.

[0011] Through the above further solution, the intelligent blocking module can be electrically connected to the upper moving contact through the first bolt.

[0012] Further, the drop - type component includes a nut, an upper ring, a fuse tube, and a lower ring. A second bolt is provided at the upper end of the upper ring. The nut is threadedly connected to the second bolt. A third bolt is provided end - to - end at the connection end of the nut and the second bolt. The third bolt is threadedly connected to the internal thread at the other end of the intelligent blocking module. One end of the fuse tube is fixedly connected to the upper ring, and the other end is fixedly connected to the lower ring.

[0013] Through the above further solution, the intelligent blocking module is threadedly connected to the nut, and the intelligent blocking module is connected to the upper moving contact, realizing the electrical connection between the upper moving contact and the nut.

[0014] Further, at least one flat surface is provided on the nut.

[0015] Through the above further solution, a customized wrench or a wrench on the market can be used to grip the nut, and thus the nut can be quickly disassembled or installed.

[0016] Further, the lower moving contact is fixedly connected to the lower ring. A pressing bolt and a tripping device are provided on the lower moving contact. The tripping device, the pressing bolt, and the lower ring are on the same horizontal plane, and the tripping device is located in the middle between the pressing bolt and the lower ring.

[0017] Through the above further solution, when connecting the fuse wire, the distance that the fuse wire travels can be reduced, and the tripping device can keep the fuse wire in a taut state all the time.

[0018] Further, the upper ring, the fuse tube, and the lower ring are hollow inside, and the second bolt is hollow inside.

[0019] Through the above further solution, the fuse wire can penetrate into it, and the upper ring is sealed by the nut, which is convenient for self - generated gas - blowing arc extinguishing during over - current.

[0020] Further, the lower moving contact, the fuse tube, and the auxiliary ring are on the same plane, and the lower moving contact and the auxiliary ring are located on both sides of the fuse tube respectively.

[0021] Through the above further solution, it is convenient to push the upper moving contact through the auxiliary ring, so that the intelligent blocking module and the drop - type component rotate around the lower moving contact.

[0022] Further, a fuse is provided inside the fuse tube. A snap ring is provided at one end of the fuse. One end of the fuse with the snap ring passes through the upper ring to the end of the second bolt and is fixed by being pressed tightly with a nut. After the other end passes through the lower ring, it bypasses the release and is fixed by being pressed tightly with a compression bolt.

[0023] Through the above further solution, one end of the fuse with the snap ring is fixed by being pressed tightly through the cooperation of the nut and the second bolt, and the other end of the fuse is fixed by being pressed tightly with the compression bolt, so as to complete the line conduction through the intelligent interruption module and the fuse.

[0024] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0025] 1. Without changing the overall size of the original drop-type fuse tube, and at the same time having an intelligent interruption function, it can effectively block the direct short circuit to the ground or the intrusion into the adjacent phase of the DC high voltage (or the pulsed DC positioning signal below 10 Hz) through the neutral point of the primary side of the PT, ensuring that the staff can troubleshoot the line at any time without manually disconnecting the PT, greatly improving the troubleshooting efficiency and shortening the power outage duration;

[0026] 2. After connecting the drop-type fuse tube type PT intelligent interruptor to the distribution network overhead line, it will not affect the normal operation of the main line, nor will it affect the output accuracy of the secondary side of the PT, bringing great convenience to the grid maintenance work;

[0027] 3. Without changing the original installation method of the drop-type fuse tube, it can be installed live by using an insulating operating rod;

[0028] 4. It can directly disconnect the nearby PT through the intelligent interruption module. When a tripping phenomenon occurs, the operation and maintenance personnel can directly go to the site to troubleshoot with a fault detector, without the need for manual switching of the PT or selection of a location for use, and wiring according to the "proximity principle".

[0029] 5. The direction of the auxiliary ring can be adjusted through the positioning nut.

[0030] 6. At least one plane is provided on the nut, and the nut can be clamped by a customized wrench or a wrench on the market, so that the nut can be quickly disassembled or installed. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the description of the embodiments.

[0032] Figure 1 It is a schematic diagram of the overall structure in the present utility model;

[0033] Figure 2 It is a schematic diagram of the overall sectional structure in the present utility model;

[0034] Figure 3 Schematic diagram of the fuse connection structure in the present utility model;

[0035] Figure 4 Schematic diagram of the nut structure in the present utility model.

[0036] In the figure: 1. Upper moving contact; 11. Auxiliary ring; 12. First bolt; 121. Locknut; 2. Lower moving contact; 21. Compression bolt; 22. Release mechanism; 3. Intelligent blocking module; 31. Internal thread; 4. Drop - type component; 41. Nut; 411. Third bolt; 42. Upper ring; 421. Second bolt; 43. Fuse tube; 44. Lower ring; 5. Fuse; 51. Snap ring. Specific embodiments

[0037] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0038] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0039] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0040] Embodiment:

[0041] Refer to Figures 1 - 4As shown in the figure, the drop - type fuse tube - type PT blocker includes an upper moving contact 1 and a lower moving contact 2. On one side of the upper moving contact 1, there is an auxiliary ring 11. At the lower end of the upper moving contact 1, there is a first bolt 12. The first bolt 12 is thread - connected to the internal thread 31 at one end of the intelligent blocking module 3. There is a positioning nut 121 on the first bolt 12, and the positioning nut 121 is located between the upper moving contact 1 and the intelligent blocking module 3. The other end of the intelligent blocking module 3 also has an internal thread 31 and is thread - connected to the third bolt 411 at one end of the nut 41. The other end of the nut 41 is thread - connected to the second bolt 421 on the upper ring 42. The upper ring 42 is fixedly connected to the lower ring 44 through a fuse tube 43. One side of the lower ring 44 is fixedly connected to the lower moving contact 2. On the lower moving contact 2, there are a compression bolt 21 and a release mechanism 22. Inside the fuse tube 43, there is a fuse 5. One end of the fuse 5 has a snap ring 51. The end of the fuse 5 with the snap ring 51 passes through the upper ring 42 to the end of the second bolt 421 and is fixed by tightening with the nut 41. After the other end passes through the lower ring 44, it bypasses the release mechanism 22 and is fixed by tightening with the compression bolt 21.

[0042] Among them, the release mechanism 22, the compression bolt 21, and the lower ring 44 are on the same horizontal plane. The release mechanism 22 is located in the middle between the compression bolt 21 and the lower ring 44. When connecting the fuse 5, it can reduce the walking distance of the fuse 5 and ensure that the fuse 5 is in a straightened state. The middle of the release mechanism 22 is concave, which can prevent the fuse 5 from sliding.

[0043] Among them, the intelligent blocking module 3 will conduct the main network AC high voltage and automatically block the DC high voltage. Therefore, the fuse 5 can be directly connected to the intelligent blocking module 3, and is directly short - circuited to the ground through the neutral point of the primary side of the PT or inserted into the adjacent phase, ensuring that the staff does not need to manually disconnect the PT. The PT can be directly disconnected through the intelligent blocking module 3, and the line can be troubleshot at any time, greatly improving the troubleshooting efficiency and shortening the power outage duration.

[0044] Among them, there is at least one flat surface on the nut 41, which is convenient to use a customized wrench or a wrench on the market to clamp the nut 41 and tighten the nut 41 with the intelligent blocking module 3 and tighten it with the second bolt 421, so that the nut 41 can be quickly disassembled or installed.

[0045] Among them, the upper ring 42, the fuse tube 43, and the lower ring 44 are hollow inside, and the second bolt 421 is hollow inside. The upper ring 42 is sleeved on the upper end of the fuse tube 43 and fixed by screws. The lower ring 44 is sleeved on the lower end of the fuse tube 43 and fixed by screws. The end of the fuse 5 without the snap ring 51 is inserted from the upper end of the second bolt 421, passes through the upper ring 42, the fuse tube 43, and the lower ring 44, which not only makes the installation of the fuse 5 convenient but also can protect the fuse 5. The second bolt 421 is blocked by the nut 41. After the fuse 5 melts, an arc is generated. Under the action of the arc, the fuse tube 43 generates a large amount of gas. Since the upper end is sealed, the gas sprays downward and blows out the arc.

[0046] Among them, the lower moving contact 2, the fuse tube 43 and the auxiliary ring 11 are located in the same plane. The lower moving contact 2 and the auxiliary ring 11 are respectively located on both sides of the fuse tube 43, facilitating the pushing of the upper moving contact 1 through the auxiliary ring 11, so that the intelligent blocking module 3 and the drop-type component 4 rotate around the lower moving contact 2.

[0047] Among them, the first bolt 12, the second bolt 421, the third bolt 411, the nut 41, the upper moving contact 1 and the lower moving contact 2 are all made of conductive materials, and the materials of the upper moving contact 1 and the lower moving contact 2 are preferably silver.

[0048] Among them, the first bolt 12 is an M10 bolt, and the third bolt 411 is an M12 bolt.

[0049] The assembly process of the drop-type fuse tube 43 type PT blocker of the present utility model is as follows:

[0050] a. Thread the first bolt 12 at the lower end of the upper moving contact 1 with the internal thread 31 at the upper end of the intelligent blocking module 3;

[0051] b. Thread the internal thread 31 at the lower end of the intelligent blocking module 3 with the third bolt 411 at the upper end of the nut 41;

[0052] c. Fix and install the upper ring 42 and the lower ring 44 at both ends of the fuse tube 43 respectively;

[0053] d. Pass the end of the fuse wire 5 without the snap ring 51 through the upper ring 42, the fuse tube 43 and the lower ring 44 in sequence from the second bolt 421, place the snap ring 51 on the top of the second bolt 421, and thread the nut 41 with the second bolt 421 to press and fix the snap ring 51. The end of the fuse wire 5 without the snap ring 51 bypasses the release 22 and is pressed and fixed by the pressing bolt 21;

[0054] e. Use a wrench to adjust the positioning nut 121, rotate the upper moving contact 1 to make the auxiliary ring 11 in the same plane as the lower moving contact 2 and the fuse tube 43, and then tighten the positioning nut 121 downward to fix the upper moving contact 1 and the intelligent blocking module 3;

[0055] f. When loading and unloading the fuse wire 5, hold the nut 41 and the fuse tube 43 with both hands, unscrew the nut 41 from the upper ring 42, and then perform the operations described in d and e in the above process.

[0056] Through the above process, the end of the fuse wire 5 with the snap ring 51 is pressed and fixed by the cooperation of the nut 41 and the second bolt 421, the other end of the fuse wire 5 is pressed and fixed by the pressing bolt 21, and one end of the intelligent blocking module 3 is fixedly connected to the upper moving contact 1 and the other end is fixedly connected to the nut 41, so that the circuit is conducted through the intelligent blocking module 3 and the fuse wire 5.

[0057] When the drop - type fuse - tube - type PT blocker of the present utility model is installed on the distribution network overhead line and a tripping phenomenon occurs:

[0058] The intelligent blocking module 3 can directly disconnect the nearby PT. The operation and maintenance personnel can directly go to the site to troubleshoot with a fault detector. There is no need for manual disconnection and connection of the PT, nor for selecting a location for use. It is wired according to the "proximity principle". If there is no fault, power can be directly restored. For the line that recovers after a transient fault, the outage duration of the substitute maintenance is shortened from several hours to within 30 minutes; for conventional faults (grounding or phase - to - phase short - circuit faults), the outage duration of the substitute maintenance is also significantly shortened, saving at least 1 - 3 hours of the time for manual disconnection and connection of the PT.

[0059] The above - mentioned is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A drop-out fused tube type PT circuit breaker, comprising an upper moving contact (1) and a lower moving contact (2), characterized in that: A first bolt (12) is provided at the lower end of the upper moving contact (1), a positioning nut (121) is provided on the first bolt (12), an intelligent blocking module (3) and a drop-type assembly (4) are provided between the upper moving contact (1) and the lower moving contact (2), the intelligent blocking module (3) and the drop-type assembly (4) are detachably connected, and the first bolt (12) and the intelligent blocking module (3) are movably connected.

2. The drop-type fused tube PT blocker according to claim 1 is characterized in that: An auxiliary ring (11) is provided on one side of the upper moving contact (1).

3. The drop-type fused tube PT blocker according to claim 1 is characterized in that: Both ends of the intelligent blocking module (3) are provided with internal threads (31); the internal threads (31) at one end of the intelligent blocking module (3) are threadedly connected to the first bolt (12); and the positioning nut (121) is located between the upper moving contact (1) and the intelligent blocking module (3).

4. The drop-type fused tube PT blocker according to claim 3 is characterized in that: The drop-type assembly (4) comprises a nut (41), an upper ring (42), a melting tube (43) and a lower ring (44); a second bolt (421) is provided at the upper end of the upper ring (42); the nut (41) is threadedly connected to the second bolt (421); a third bolt (411) is provided at the connecting ends of the nut (41) and the second bolt (421); the third bolt (411) is threadedly connected to the internal thread (31) at the other end of the intelligent blocking module (3); one end of the melting tube (43) is fixedly connected to the upper ring (42), and the other end is fixedly connected to the lower ring (44).

5. The drop-type fused tube PT blocker according to claim 4 is characterized in that: The nut (41) is provided with at least one flat surface.

6. The drop-type fused tube PT blocker according to claim 4, characterized in that: The lower moving contact (2) is fixedly connected to the lower ring (44); a clamping bolt (21) and a release (22) are provided on the lower moving contact (2); the release (22), the clamping bolt (21) and the lower ring (44) are located on the same horizontal plane; the release (22) is located between the clamping bolt (21) and the lower ring (44).

7. The drop-type fused tube PT blocker according to claim 4, characterized in that: The upper ring (42), the melting tube (43) and the lower ring (44) are hollow inside, and the second bolt (421) is hollow inside.

8. The drop-out fused tube PT blocker according to claim 6, characterized in that: The lower moving contact (2), the melting tube (43) and the auxiliary ring (11) are located on the same plane, and the lower moving contact (2) and the auxiliary ring (11) are respectively located on both sides of the melting tube (43).

9. The drop-out fused tube type PT blocker according to claim 7, characterized in that: A fuse (5) is arranged in the melting tube (43), and a clamping ring (51) is arranged at one end of the fuse (5). One end of the fuse (5) provided with the clamping ring (51) passes through the upper ring (42) to the end of the second bolt (421) and is compressed and fixed by the nut (41), and the other end passes through the lower ring (44) and bypasses the releaser (22) to the clamping bolt (21) and is compressed and fixed.

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