Fault monitoring equipment for oil-immersed distribution transformer

Abstract

The utility model provides an oil-immersed distribution transformer fault monitoring device which comprises a transformer shell, one end of an inner cavity of the transformer shell is fixedly connected with a position restraining cylinder, the upper end of an inner cavity of the position restraining cylinder is fixedly connected with a transverse plate, the transverse plate is movably connected with an adjusting lead screw through a bearing, and the lower end of the adjusting lead screw is in threaded connection with a movable plate. And meanwhile, the upper end of an inner cavity of the binding cylinder is slidably connected with a floating plate, a through hole is correspondingly formed in the position, opposite to the adjusting lead screw, of the middle of the floating plate, and mounting frames are symmetrically connected to the side faces of the inner cavity of the transformer shell. According to the utility model, through the cooperation of the position restraining cylinder, the adjusting screw rod, the floating plate, the moving plate, the trigger, the ultrasonic range finder and the temperature sensor, the device can correspondingly monitor the liquid level height and the temperature of transformer oil in the transformer shell, so that when the liquid level height or the temperature of the transformer oil is abnormal, the transformer oil can be monitored; a person in charge can be notified in time, and the response speed of workers is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to transformer technical field, concretely relates to a kind of oil-immersed distribution transformer fault monitoring equipment. BACKGROUND

[0002] As the key equipment in power transmission system, the safety and stability of oil-immersed distribution transformer are very important, so when the running state of oil-immersed distribution transformer is abnormal, it needs to be handled in time, and oil-immersed transformer usually has faults such as excessive temperature of iron core, short circuit of winding and abnormal oil level of oil tank. At present, the method of artificial inspection is usually used to monitor and handle the faults of oil-immersed distribution transformer, but artificial inspection will consume a lot of manpower cost, and the inspection personnel may not be able to check the abnormal problems of transformer in time. For example, when the transformer oil in the oil-immersed distribution transformer with a fully sealed structure leaks unexpectedly or has abnormal temperature, it is difficult to find out in time, so as to ensure the fault monitoring effect of oil-immersed distribution transformer. At the same time, the single sensor monitoring structure is easy to cause false alarm or no alarm due to its own fault, so that the fault monitoring is not stable enough. SUMMARY

[0003] In order to overcome the defects of the prior art, the oil-immersed distribution transformer fault monitoring equipment is provided to solve the problems in the background art.

[0004] In order to achieve the above purpose, the oil-immersed distribution transformer fault monitoring equipment is provided, which comprises a transformer shell, an ultrasonic range finder and a PLC assembly are fixedly connected to the top of the inner cavity of the transformer shell respectively, one end of the inner cavity of the transformer shell is fixedly connected to a binding cylinder, the upper end of the inner cavity of the binding cylinder is fixedly connected to a horizontal plate, the horizontal plate is movably connected to an adjusting screw through a bearing, the lower end of the adjusting screw is screwed to a moving plate, the upper surface of the moving plate is symmetrically connected to a trigger, the upper end of the inner cavity of the binding cylinder is slidably connected to a floating plate, a through hole is formed in the middle of the floating plate corresponding to the position of the adjusting screw, and the side surface of the inner cavity of the transformer shell is symmetrically connected to a mounting frame, and the surface of the mounting frame is symmetrically connected to a temperature sensor.

[0005] Preferably, the mounting frame has two groups, both groups of mounting frames are in the shape of, and the upper surface of one group of mounting frames and the lower surface of the other group of mounting frames are fixedly connected to a plurality of temperature sensors at equal intervals along the length direction.

[0006] Preferably, the end surface of the mounting frame is in the shape of, the edges of the outer side surface of the mounting frame are in the shape of, and a plurality of reinforcing rods are fixedly connected between the two groups of mounting frames at equal intervals in parallel, and the plurality of reinforcing rods are in the shape of semicircular cylinder.

[0007] Preferably, the bundle position cylinder is in overall square cylinder structure, a plurality of groups of through holes are uniformly arranged on the lower end of the surface of the bundle position cylinder, and the upper and lower ends of the bundle position cylinder do not abut against the top and bottom of the inner cavity of the transformer shell.

[0008] Preferably, the horizontal plate fixedly connected at the opening of the upper end of the bundle position cylinder is in rectangular structure, the horizontal plate and the adjusting screw rod are combined to form T-shaped structure, the width of the horizontal plate is smaller than the width of the inner cavity of the bundle position cylinder, and the upper end of the adjusting screw rod is fixedly connected with the rotating plate.

[0009] Preferably, the floating plate is in overall rectangular structure, the through hole arranged in the middle of the floating plate is in cylindrical structure, the diameter of the through hole is greater than the diameter of the adjusting screw rod, the sealing cavity arranged in the inner part of the floating plate is in character-shaped structure, and the size of the outer side surface of the floating plate is matched with the size of the inner cavity of the bundle position cylinder.

[0010] Preferably, the baffle fixedly connected with the lower end of the adjusting screw rod is in circular structure, the moving plate screwed with the lower end of the adjusting screw rod is in square structure, the size of the moving plate is matched with the size of the inner cavity of the bundle position cylinder, a plurality of groups of through holes are uniformly arranged on the surface of the moving plate, and four groups of triggers are symmetrically connected to the upper surface of the moving plate.

[0011] Compared with the prior art, the device has the beneficial effects that: through the cooperation of the bundle position cylinder, the adjusting screw rod, the moving plate and the trigger, the moving range of the floating plate can be effectively limited, when the transformer oil surface in the transformer shell drops to the preset warning height, the floating plate can press down the trigger, so that the PLC component can send corresponding information to the responsible person for warning, the ultrasonic distance meter is arranged, so that the ultrasonic distance meter can monitor the height change of the transformer oil surface in real time, through the double monitoring structure, the monitoring effect of the device on the abnormal height of the transformer oil surface can be effectively enhanced, through the cooperation of the mounting frame and the temperature sensor, the device can monitor the temperature change at multiple positions in the transformer shell, so that the monitoring feedback efficiency and accuracy of the device on the temperature abnormal fault are improved, and the stability of the device in use is enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a front view schematic diagram of the embodiment of the utility model.

[0013] Figure 2 It is a side view schematic diagram of the embodiment of the utility model.

[0014] Figure 3 It is a top view schematic diagram of the embodiment of the utility model.

[0015] Figure 4 It is the A place of the embodiment of the utility model Figure 1 Enlarged schematic diagram.

[0016] In the figure: 1, transformer shell; 2, bundle position cylinder; 3, mounting frame; 4, reinforcing rod; 5, temperature sensor; 6, moving plate; 7, floating plate; 8, adjusting screw; 9, ultrasonic range finder; 10, cross plate; 11, PLC assembly; 12, trigger; 13, rotating plate. DETAILED DESCRIPTION

[0017] Referring to Figures 1 to 4 As shown in the utility model provides a kind of oil-immersed distribution transformer fault monitoring equipment, comprising: transformer shell 1, the top of the cavity of transformer shell 1 is respectively fixedly connected ultrasonic range finder 9 and PLC assembly 11, one end of the cavity of transformer shell 1 is fixedly connected bundle position cylinder 2, the upper end of the cavity of bundle position cylinder 2 is fixedly connected cross plate 10, and cross plate 10 is movably connected adjusting screw 8 by bearing, the lower end of adjusting screw 8 is screwed moving plate 6, and the upper surface of moving plate 6 is symmetrically connected trigger 12, while the upper end of the cavity of bundle position cylinder 2 is slidably connected floating plate 7, and the position corresponding to adjusting screw 8 is provided with through hole in the middle of floating plate 7, and the side of the cavity of transformer shell 1 is symmetrically connected mounting frame 3, and the surface of mounting frame 3 is symmetrically connected temperature sensor 5.

[0018] In this embodiment, when the transformer oil level inside the oil-immersed distribution transformer changes, the ultrasonic rangefinder 9 transmits the level change data to the electrically connected PLC component 11 in real time. When the level drops to a preset alarm value within the PLC component 11, the PLC component 11 checks for a trigger 12 signal. If no trigger 12 signal is received, the PLC component 11 sends a fault message for the ultrasonic rangefinder 9 to the relevant personnel via its built-in wireless transceiver module. As the transformer oil level decreases, the float 7 descends synchronously. When the level is below the height of the moving plate 6, the lower surface of the float 7 simultaneously abuts against the four sets of triggers 12 on the upper surface of the moving plate 6. The four sets of triggers 12 transmit signals to the electrically connected PLC component 11. Therefore, when the PLC component 11 receives signals from at least two sets of triggers 12, the PLC component 11 will... The built-in wireless transceiver module sends warnings about abnormal transformer oil levels to relevant personnel, improving worker response speed and accelerating the troubleshooting of oil-immersed distribution transformers. When the temperature of the transformer oil inside the transformer casing 1 changes, multiple temperature sensors 5 on the mounting frame 3 transmit the temperature of multiple points of the transformer oil in real time to the electrically connected PLC component 11. When the temperature of the transformer oil reaches the preset warning value inside the PLC component 11, the PLC component 11 will send a warning about abnormal transformer oil temperature to relevant personnel through the built-in wireless transceiver module. This effectively reduces the frequency of manual inspections, lowers the labor intensity of workers, and improves the timeliness of fault detection in oil-immersed distribution transformers. It also reduces the probability of further damage to oil-immersed distribution transformers due to untimely fault detection, minimizes unnecessary losses, and ensures normal power supply to related equipment.

[0019] In a preferred embodiment, there are two sets of mounting frames 3. Both sets of mounting frames 3 are of the U-shape, and multiple sets of temperature sensors 5 are fixedly connected at equal intervals along the length direction on the upper surface of one set of mounting frames 3 and the lower surface of the other set of mounting frames 3.

[0020] In this embodiment, as Figure 1 , Figure 2 and Figure 3 The mounting frame 3 allows multiple temperature sensors 5 to be fixedly connected inside the transformer housing 1, enabling the PLC component 11 to monitor temperature changes at multiple points in the transformer oil in real time, facilitating maintenance workers to promptly detect abnormal transformer oil temperatures.

[0021] As a preferred embodiment, the end face of the mounting frame 3 is U-shaped, the edges of the outer side of the mounting frame 3 are all arc-shaped, and multiple sets of reinforcing rods 4 are fixedly connected between the two sets of mounting frames 3 in parallel and at equal intervals. At the same time, the multiple sets of reinforcing rods 4 are all semi-cylindrical.

[0022] In the embodiment, as shown in Figure 1 , Figure 2 and Figure 3 , the arrangement of the reinforcing rod 4 can effectively enhance the structural strength of the connection between the two groups of mounting frames 3, thereby assisting in enhancing the stability of the connection between the mounting frame 3 and the transformer shell 1, and the arc surface structure of the mounting frame 3 and the reinforcing rod 4 can effectively reduce the probability of excessive accumulation of electric charge and improve the safety of the equipment during use.

[0023] As a preferred embodiment, the bundle position cylinder 2 is in the overall square cylinder structure, a plurality of through holes are uniformly arranged on the lower end surface of the bundle position cylinder 2, and the upper and lower ends of the bundle position cylinder 2 do not abut against the top and bottom of the inner cavity of the transformer shell 1.

[0024] In the embodiment, as shown in Figure 1 and Figure 2 , the bundle position cylinder 2 is made of insulating material, and the through holes arranged on the lower end of the bundle position cylinder 2 enable the transformer oil filled in the transformer shell 1 to flow smoothly into the inside of the bundle position cylinder 2, and the bundle position cylinder 2 is provided with openings at both ends, so that the liquid level inside the bundle position cylinder 2 is equal to the liquid level on the outside of the bundle position cylinder 2.

[0025] As a preferred embodiment, the horizontal plate 10 fixedly connected to the opening at the upper end of the bundle position cylinder 2 is in the rectangular structure, the horizontal plate 10 and the adjusting screw rod 8 are combined together to form the T-shaped structure, the width of the horizontal plate 10 is less than the width of the inner cavity of the bundle position cylinder 2, and the upper end of the adjusting screw rod 8 is fixedly connected with the rotating plate 13.

[0026] In the embodiment, as shown in Figure 2 , Figure 3 and Figure 4 , the arrangement of the horizontal plate 10 enables the adjusting screw rod 8 to stably rotate at the upper end of the inner cavity of the bundle position cylinder 2, and avoids the opening at the upper end of the bundle position cylinder 2 from being blocked, thereby ensuring the accuracy of the liquid level in the inner cavity of the bundle position cylinder 2 and the liquid level on the outside of the bundle position cylinder 2.

[0027] As a preferred embodiment, the floating plate 7 is in the overall rectangular structure, the through hole arranged in the middle of the floating plate 7 is in the cylindrical structure, the diameter of the through hole is greater than the diameter of the adjusting screw rod 8, the sealing cavity arranged in the inside of the floating plate 7 is in the back-shaped structure, and the size of the outside of the floating plate 7 is adapted to the size of the inner cavity of the bundle position cylinder 2.

[0028] In the embodiment, as shown in Figure 2 , Figure 3 and Figure 4The hollow structure of the float plate 7 can effectively enhance the buoyancy of the float plate 7 on the surface of the transformer oil, ensuring that the float plate 7 can change synchronously with the change of the transformer oil level. At the same time, the size of the outer side of the float plate 7 and the opening of the through hole can enhance the stability of the float plate 7 when it moves, and avoid the problem of mutual interference between the float plate 7 and the adjusting screw 8.

[0029] In a preferred embodiment, the baffle fixedly connected to the lower end of the adjusting screw 8 has a circular structure, while the movable plate 6 screwed to the lower end of the adjusting screw 8 has a square structure. The size of the movable plate 6 is compatible with the inner cavity of the positioning cylinder 2. Multiple sets of through holes are evenly opened on the surface of the movable plate 6, and four sets of triggers 12 are symmetrically connected to the upper surface of the movable plate 6.

[0030] In this embodiment, as Figure 2 and Figure 4 The baffle effectively prevents the moving plate 6 from accidentally disengaging from the adjusting screw 8. The evenly spaced through holes on the surface of the moving plate 6 allow transformer oil to pass smoothly through the moving plate 6, enabling the float plate 7 to float above the moving plate 6. At the same time, the multiple sets of triggers 12 effectively reduce the probability of failure to monitor fault information in a timely manner due to the failure of a single trigger 12, thereby improving the stability and accuracy of the equipment during use.

[0031] This utility model's oil-immersed distribution transformer fault monitoring device, through the cooperation of a positioning cylinder 2, adjusting screw 8, float plate 7, moving plate 6, trigger 12, ultrasonic rangefinder 9, and temperature sensor 5, enables the device to monitor the level and temperature of the transformer oil inside the transformer casing 1. When the level or temperature of the transformer oil is abnormal, it can promptly notify the responsible personnel, improving the worker's response speed and reducing the probability of further damage to the oil-immersed distribution transformer. Simultaneously, the coordinated use of multiple monitoring structures can effectively reduce the probability of false alarms or no fault reporting, ensuring the safety of the oil-immersed distribution transformer.

[0032] The parts of the circuits, electronic components and modules involved in this application are all prior art, which can be fully implemented by those skilled in the art, and the content protected by this utility model does not involve any improvement to the software and methods.

Claims

1. An oil-immersed distribution transformer fault monitoring apparatus comprising: Transformer shell (1), the top of the cavity of transformer shell (1) is respectively fixedly connected with ultrasonic range finder (9) and PLC assembly (11), characterized by: one end of the cavity of transformer shell (1) is fixedly connected with a binding cylinder (2), the upper end of the cavity of binding cylinder (2) is fixedly connected with a cross plate (10), and the cross plate (10) is movably connected with an adjusting screw rod (8) through a bearing, the lower end of the adjusting screw rod (8) is screwed with a moving plate (6), the upper surface of the moving plate (6) is symmetrically connected with a trigger (12), meanwhile, the upper end of the cavity of the binding cylinder (2) is slidably connected with a floating plate (7), a through hole is formed in the floating plate (7) corresponding to the position of the adjusting screw rod (8), and the side surface of the cavity of the transformer shell (1) is symmetrically connected with a mounting frame (3), and the surface of the mounting frame (3) is symmetrically connected with a temperature sensor (5).

2. The oil-immersed distribution transformer fault monitoring device according to claim 1, characterized in that, The mounting frame (3) has two groups, and the two groups of mounting frames (3) are in a structure, and the upper surface of one group of mounting frames (3) and the lower surface of the other group of mounting frames (3) are fixedly connected with a plurality of temperature sensors (5) at equal intervals along the length direction.

3. The oil-immersed distribution transformer fault monitoring device according to claim 1, characterized in that, The end surface of the mounting frame (3) is in a structure, the edges of the outer side surface of the mounting frame (3) are in an arc structure, and a plurality of reinforcing rods (4) are fixedly connected between the two groups of mounting frames (3) in parallel at equal intervals.

4. The oil-immersed distribution transformer fault monitoring device according to claim 1, characterized in that, The binding cylinder (2) is in a square cylindrical structure, a plurality of through holes are uniformly formed in the lower end of the surface of the binding cylinder (2), and the upper and lower ends of the binding cylinder (2) do not abut against the top and bottom of the cavity of the transformer shell (1).

5. The oil-immersed distribution transformer fault monitoring device according to claim 1, characterized in that, The cross plate (10) fixedly connected with the upper end of the binding cylinder (2) is in a rectangular structure, the cross plate (10) and the adjusting screw rod (8) are combined to form a T-shaped structure, and the width of the cross plate (10) is less than the width of the cavity of the binding cylinder (2), and the upper end of the adjusting screw rod (8) is fixedly connected with a rotating plate (13).

6. The oil-immersed distribution transformer fault monitoring device according to claim 1, characterized in that, The floating plate (7) is in a rectangular structure, the through hole formed in the middle of the floating plate (7) is in a cylindrical structure, and the diameter of the through hole is greater than the diameter of the adjusting screw rod (8), and the sealing cavity formed in the floating plate (7) is in a character structure, and the size of the outer side surface of the floating plate (7) is matched with the size of the cavity of the binding cylinder (2).

7. The oil-immersed distribution transformer fault monitoring device according to claim 1, characterized in that, The baffle fixedly connected with the lower end of the adjusting screw rod (8) is in a circular structure, the moving plate (6) screwed with the lower end of the adjusting screw rod (8) is in a square structure, and the size of the moving plate (6) is matched with the size of the cavity of the binding cylinder (2), and a plurality of through holes are uniformly formed in the surface of the moving plate (6), and four groups of triggers (12) are symmetrically connected with the upper surface of the moving plate (6).

Images