A transformer partial discharge positioning device

Abstract

The utility model discloses a kind of transformer partial discharge positioning devices, including sensor body and flange plate, the sensor body is at flange plate top position, the sensor body is connected with wire inside, and wire one end passes through sensor body and extends outward, the sensor body top is equipped with reinforcing assembly, the reinforcing assembly includes mounting bracket, the mounting bracket is fixedly connected in sensor body top outer wall, four limit rods are fixedly connected in the mounting bracket inside, and four the limit rod is located in the left and right sides of mounting bracket inside in two groups respectively, and the same mobile seat is slidably sleeved between every two limit rods, the utility model is connected by setting reinforcing assembly, the shell of wire and sensor can be connected, so that guarantee wire when being pulled, alternative connecting end bears tension, can effectively avoid broken contact problem to affect the use of equipment.

Description

Technical Field

[0001] This utility model relates to the field of partial discharge detection technology, specifically a transformer partial discharge locating device. Background Technology

[0002] Transformers are crucial equipment in power systems, and their operating status directly affects the safety and stability of the power grid. Partial discharge is a common precursor to faults in transformer insulation systems. If it is not detected and addressed in time, it will lead to gradual deterioration of insulation performance, which may eventually cause transformer failure, resulting in power outages and causing huge economic losses to power companies and users.

[0003] A search revealed a utility model patent with Chinese patent publication number CN205941793U, which discloses a transformer partial discharge detection device, including a housing and a circuit board. The housing is provided with a display 1, function buttons, switches, and interfaces. The circuit board is located inside the housing and is provided with a microprocessor 2, a signal conversion circuit, a signal amplification circuit, and a power supply circuit 3. The device is characterized in that an ultrasonic detection sensor 8 and an ultra-high frequency detection sensor 9 are provided outside the housing.

[0004] The positioning device mentioned above is generally powered by an external cable. However, if a person trips over the cable while walking, it may cause a break in the connection between the cable and the sensor, thus rendering the device ineffective. There is room for improvement. Utility Model Content

[0005] The purpose of this invention is to provide a transformer partial discharge locating device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a transformer partial discharge positioning device, comprising a sensor body and a flange, wherein the sensor body is located at the top of the flange, and a wire is connected inside the sensor body, with one end of the wire passing through the sensor body and extending outward. A reinforcement component is installed on the top of the sensor body, the reinforcement component including a mounting frame, the mounting frame being fixedly connected to the outer wall of the top of the sensor body, and four limiting rods being fixedly connected inside the mounting frame, the four limiting rods being located in pairs on the left and right sides inside the mounting frame, and a common movable seat being slidably sleeved between the two limiting rods in each pair, and a clamping sleeve being fixedly connected to the end of each of the two movable seats that are close to each other, and both clamping sleeves wrapping around the outside of the wire, and a transmission structure is provided inside the mounting frame, the transmission structure including a bidirectional lead screw.

[0007] The wire and sensor housing can be connected to ensure that the wire bears the tension at the connection end when it is pulled, effectively preventing the problem of broken contact from affecting the use of the equipment. By turning the knob, the bidirectional lead screw rotates inside the mounting bracket. The moving seat, which is restricted by the limit rod, cannot rotate. The bidirectional lead screw can then drive the two moving seats to move closer to each other, and the two clamping sleeves can tightly clamp the wire. When the wire is pulled by an external force, the tension is transmitted through the wire to the clamping sleeve and the moving seat under the action of friction. Then, it is transmitted to the sensor body through the limit rod and the mounting bracket. Through this force transmission method, the tension will not act directly on the connection between the wire and the internal components of the sensor body, thus avoiding the occurrence of broken contact.

[0008] As a further preferred embodiment of this technical solution, the bidirectional lead screw is rotatably connected inside the mounting frame, and the two movable seats are respectively threaded to the threads at both ends of the bidirectional lead screw, with a knob provided in the middle of the bidirectional lead screw.

[0009] As a further preferred embodiment of this technical solution, a rubber sleeve is fixedly fitted onto the outside of each of the two clamping sleeves.

[0010] As a further preferred embodiment of this technical solution, a connecting assembly is installed between the sensor body and the flange. The connecting assembly includes a receiving groove opened on the outer wall of the top of the flange, and a limiting ring is slidably inserted into the receiving groove. The limiting ring is fixedly connected to the bottom of the outer circumference of the sensor body.

[0011] As a further preferred embodiment of this technical solution, a pull ring is slidably sleeved on the outside of the sensor body, and an extension ring is coaxially fixed at the middle position of the outer circumference of the sensor body. The pull ring and the extension ring are in contact. A threaded tube is coaxially fixed on the outer wall of the top of the flange, and the pull ring is threadedly sleeved on the outside of the threaded tube.

[0012] When the sensor body needs maintenance, turn the pull ring counterclockwise. The pull ring will gradually rotate and disengage from the threaded tube. The sensor body and extension ring will no longer be under pressure, and the sensor body can be quickly removed, making the operation more convenient. After the work is completed, put the sensor body into the receiving groove. Due to the presence of the limit ring, the sensor body will not continue to move downward. Then, turn the pull ring clockwise. The pull ring will move downward along the threaded tube, and then the pull ring will contact the extension ring. The sensor body will be squeezed and tightly contacted with the receiving groove, and the sensor body will be fixed to the flange.

[0013] As a further preferred embodiment of this technical solution, a placement groove is provided on the outer top wall of the extension ring and the inner bottom wall of the receiving groove, and a sealing ring is provided inside each of the two placement grooves.

[0014] As a further preferred embodiment of this technical solution, the thread helix angle of the threads at both ends of the bidirectional lead screw is less than the equivalent friction angle.

[0015] This utility model provides a transformer partial discharge locating device, which has the following beneficial effects:

[0016] (1) By setting up a reinforcement component, the present invention can connect the wire and the sensor housing, thereby ensuring that the wire can bear the tension at the connection end when it is pulled, which can effectively avoid the problem of broken contact affecting the use of the equipment. By driving the double screw to rotate inside the mounting frame through the knob, the moving seat restricted by the limit rod cannot rotate. The double screw can drive the two moving seats to move closer to each other, and the two clamping sleeves can clamp the wire tightly. When the wire is pulled by an external force, under the action of friction, the tension is transmitted through the wire to the clamping sleeve and the moving seat, and then through the limit rod and the mounting frame to the sensor body. Through this force transmission method, the tension will not act directly on the connection between the wire and the internal components of the sensor body, thereby avoiding the occurrence of broken contact.

[0017] (2) By setting up a connecting component, when the sensor body needs to be repaired, the pull ring is rotated counterclockwise. The pull ring gradually rotates away from the threaded tube, and the sensor body and the extension ring are no longer under pressure. The sensor body can be quickly removed, making the operation more convenient. After the work is completed, the sensor body is placed in the receiving groove. Due to the presence of the limiting ring, the sensor body will not continue to move downward. Then, the pull ring is rotated clockwise. The pull ring moves downward along the threaded tube. Then, the pull ring contacts the extension ring, and the sensor body will be squeezed and tightly contacted with the receiving groove. The sensor body will be fixed to the flange. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall first-view structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the overall second-view structure of this utility model;

[0020] Figure 3 For the present utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0021] Figure 4 For the present utility model Figure 2 Enlarged structural diagram at point B;

[0022] In the diagram: 1. Sensor body; 2. Wire; 3. Flange; 4. Reinforcing assembly; 5. Connecting assembly; 401. Mounting bracket; 402. Two-way lead screw; 403. Limiting rod; 404. Moving seat; 405. Clamping sleeve; 406. Rubber sleeve; 501. Receiving groove; 502. Limiting ring; 503. Threaded pipe; 504. Pulling ring; 505. Extension ring; 506. Sealing ring. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0024] This utility model provides a technical solution: such as Figure 1 , Figure 2 and Figure 4 As shown, in this embodiment, a transformer partial discharge locating device includes a sensor body 1 (a UHF sensor; when a partial discharge occurs, it excites a steep pulse current, which radiates electromagnetic waves into the surrounding space, with a frequency range of several GHz, belonging to the UHF band (300MHz-3GHz). The UHF method utilizes the UHF sensor to receive these electromagnetic wave signals, and through signal analysis and processing, determines the occurrence of partial discharge and locates the discharge position. This is analogous to how, in the dark, a partial discharge acts as a "signal light," its emitted electromagnetic wave signals are like light, and the UHF sensor is like the "eye," capturing these light signals to determine the location of the partial discharge.) and a flange 3, with the sensor body 1 located at the top of the flange 3. A wire 2 is connected inside the sensor body 1, with one end of the wire 2 passing through the sensor body 1 and extending outwards. The unit is equipped with a reinforcement component 4, which includes a mounting frame 401. The mounting frame 401 is fixedly connected to the top outer wall of the sensor body 1. Four limiting rods 403 are fixedly connected inside the mounting frame 401. The four limiting rods 403 are located in pairs on the left and right sides inside the mounting frame 401, and the same movable seat 404 is slidably sleeved between the two limiting rods 403 in each pair. A clamping sleeve 405 is fixedly connected to the end of each movable seat 404 that is close to each other, and both clamping sleeves 405 are wrapped around the outside of the wire 2. The mounting frame 401 is equipped with a transmission structure, which includes a bidirectional lead screw 402. For newly built substations, it is recommended to open detection holes in the transformer body and install 1-3 UHF sensors, which can further improve the sensitivity of partial discharge detection and make fault location possible (the manufacturer needs to cooperate to open detection holes in the transformer body and install the UHF sensors at the time of transformer delivery). For power plants undergoing technical upgrades, we recommend installing UHF sensors at the transformer drain port or manhole (replace the manhole baffle with the UHF sensor during transformer maintenance).

[0025] The bidirectional lead screw 402 is rotatably connected inside the mounting bracket 401, and two movable seats 404 are threadedly connected to the threads at both ends of the bidirectional lead screw 402. A knob is provided in the middle of the bidirectional lead screw 402.

[0026] Each of the two clamping sleeves 405 is fixedly fitted with a rubber sleeve 406, which can prevent the wire 2 from being damaged by compression and can increase the friction between the clamping sleeve 405 and the wire 2.

[0027] By rotating the bidirectional lead screw 402 inside the mounting bracket 401 using a knob, the movable seat 404, which is restricted by the limiting rod 403, cannot rotate. The bidirectional lead screw 402 can then drive the two movable seats 404 to move closer to each other, and the two clamping sleeves 405 can tightly clamp the wire 2. When the wire 2 is pulled by an external force, under the action of friction, the pulling force is transmitted through the wire 2 to the clamping sleeve 405 and the movable seat 404, and then through the limiting rod 403 and the mounting bracket 401 to the sensor body 1. Through this force transmission method, the pulling force will not act directly on the connection between the wire 2 and the internal components of the sensor body 1, thereby avoiding the occurrence of contact failure.

[0028] like Figure 2 and Figure 4 As shown, a connecting assembly 5 is installed between the sensor body 1 and the flange 3. The connecting assembly 5 includes a receiving groove 501 opened on the top outer wall of the flange 3. A limiting ring 502 is slidably inserted into the receiving groove 501. The limiting ring 502 is fixedly connected to the bottom of the outer circumference of the sensor body 1.

[0029] A pull ring 504 is slidably sleeved on the outside of the sensor body 1. An extension ring 505 is coaxially fixed at the middle position of the outer circumference of the sensor body 1. The pull ring 504 and the extension ring 505 are in contact. A threaded tube 503 is coaxially fixed on the outer wall of the top of the flange 3. The pull ring 504 is threadedly sleeved on the outside of the threaded tube 503.

[0030] When the sensor body 1 needs maintenance, rotate the pull ring 504 counterclockwise. The pull ring 504 gradually rotates and disengages from the threaded tube 503. The sensor body 1 and the extension ring 505 are no longer under pressure, and the sensor body 1 can be quickly removed, making the operation more convenient. After the work is completed, put the sensor body 1 into the receiving groove 501. Due to the presence of the limit ring 502, the sensor body 1 will not continue to move downward. Then rotate the pull ring 504 clockwise. The pull ring 504 moves downward along the threaded tube 503. Then the pull ring 504 contacts the extension ring 505, and the sensor body 1 will be squeezed and in close contact with the receiving groove 501. The sensor body 1 will then be fixed to the flange 3.

[0031] like Figure 4As shown, a placement groove is provided on the top outer wall of the extension ring 505 and the bottom inner wall of the receiving groove 501, and a sealing ring 506 is provided inside the two placement grooves to prevent dust, moisture and other substances from entering the connection between the sensor body 1 and the flange 3.

[0032] like Figure 1 and Figure 2 As shown, the thread helix angle of the threads at both ends of the bidirectional lead screw 402 is less than the equivalent friction angle, which gives it self-locking properties and ensures that the positions of the two movable seats 404 connected to it will not change during use.

[0033] This utility model provides a transformer partial discharge locating device, the specific working principle of which is as follows:

[0034] When the device is working, the double-acting lead screw 402 is driven to rotate inside the mounting bracket 401 by the knob. The movable seat 404, which is restricted by the limiting rod 403, cannot rotate. The double-acting lead screw 402 can drive the two movable seats 404 to move closer to each other, and the two clamping sleeves 405 can clamp the wire 2 tightly. When the wire 2 is pulled by an external force, under the action of friction, the pulling force is transmitted through the wire 2 to the clamping sleeve 405 and the movable seat 404, and then through the limiting rod 403 and the mounting bracket 401 to the sensor body 1. Through this force transmission method, the pulling force will not act directly on the connection between the wire 2 and the internal components of the sensor body 1, thereby avoiding the occurrence of disconnection problems. When the sensor body 1 needs maintenance, rotate the pull ring 504 counterclockwise. The pull ring 504 gradually rotates and disengages from the threaded tube 503. The sensor body 1 and the extension ring 505 are no longer under pressure, and the sensor body 1 can be quickly removed, making the operation more convenient. After the work is completed, put the sensor body 1 into the receiving groove 501. Due to the presence of the limit ring 502, the sensor body 1 will not continue to move downward. Then rotate the pull ring 504 clockwise. The pull ring 504 moves downward along the threaded tube 503. Then the pull ring 504 contacts the extension ring 505, and the sensor body 1 will be squeezed and in close contact with the receiving groove 501. The sensor body 1 will then be fixed to the flange 3.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A transformer partial discharge locating device, comprising a sensor body (1) and a flange (3), characterized in that: The sensor body (1) is located at the top of the flange (3). A wire (2) is connected inside the sensor body (1), and one end of the wire (2) passes through the sensor body (1) and extends outward. A reinforcement component (4) is installed on the top of the sensor body (1). The reinforcement component (4) includes a mounting bracket (401). The mounting bracket (401) is fixedly connected to the top outer wall of the sensor body (1). Four limiting rods (403) are fixedly connected inside the mounting bracket (401). The four limiting rods (403) are located in pairs on the left and right sides inside the mounting bracket (401). The same moving seat (404) is slidably sleeved between the two limiting rods (403) in each pair. A clamping sleeve (405) is fixedly connected to the end of the two moving seats (404) that are close to each other. Both clamping sleeves (405) are wrapped around the outside of the wire (2). A transmission structure is provided inside the mounting bracket (401), and the transmission structure includes a bidirectional lead screw (402).

2. The transformer partial discharge locating device according to claim 1, characterized in that: The bidirectional lead screw (402) is rotatably connected inside the mounting bracket (401), and the two movable seats (404) are respectively threaded to the threads at both ends of the bidirectional lead screw (402). A knob is provided in the middle of the bidirectional lead screw (402).

3. The transformer partial discharge locating device according to claim 1, characterized in that: Each of the two clamping sleeves (405) is fixedly fitted with a rubber sleeve (406).

4. The transformer partial discharge locating device according to claim 1, characterized in that: A connecting assembly (5) is installed between the sensor body (1) and the flange (3). The connecting assembly (5) includes a receiving groove (501) opened on the top outer wall of the flange (3). A limiting ring (502) is slidably inserted inside the receiving groove (501). The limiting ring (502) is fixedly connected to the bottom of the outer circumference of the sensor body (1).

5. A transformer partial discharge locating device according to claim 4, characterized in that: A pull ring (504) is slidably sleeved on the outside of the sensor body (1). An extension ring (505) is coaxially fixed at the middle position of the outer circumference of the sensor body (1). The pull ring (504) and the extension ring (505) are in contact. A threaded tube (503) is coaxially fixed on the outer wall of the top of the flange (3). The pull ring (504) is threadedly sleeved on the outside of the threaded tube (503).

6. A transformer partial discharge locating device according to claim 5, characterized in that: The outer top wall of the extension ring (505) and the inner bottom wall of the receiving groove (501) are each provided with a placement groove, and a sealing ring (506) is provided inside each of the two placement grooves.

7. A transformer partial discharge locating device according to claim 1, characterized in that: The thread helix angle of the threads at both ends of the bidirectional lead screw (402) is less than the equivalent friction angle.

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