Device for detecting sealing performance of transformer cover plate

Abstract

The utility model provides a transformer cover plate sealing performance detection device which comprises an oil tank, an oil inlet pipe is fixedly connected to the lower portion of the left side of the front end face of the oil tank, an oil outlet pipe is fixedly connected to the lower portion of the right side of the front end face of the oil tank, a lifting device is arranged in the middle of the upper end face of the oil tank, and a bearing frame is fixedly connected to the middle of the lifting device. Locking devices are fixedly connected to the middles of the left and right end faces of an inner cavity of the bearing frame, a box body is installed on the bottom end face of the inner cavity of the bearing frame, the left and right end faces of the box body are attached to the left and right locking devices, and the device is simple in structure, convenient to operate and capable of effectively and rapidly detecting the sealing performance of the transformer cover plate.

Description

Technical Field

[0001] The present disclosure specifically discloses a transformer production technology field, and in particular relates to a transformer cover sealing detection device. Background Art

[0002] The body of the oil-immersed transformer (windings and core) is installed in an oil tank filled with transformer oil to protect the transformer and extend its service life. During the production of the oil tank, it is necessary to conduct a sealing test on the oil tank to ensure the sealing and pressure-maintaining performance of the oil tank. When testing the oil tank, it is generally immersed in water and then observed whether there are bubbles around the oil tank to judge the sealing of the oil tank.

[0003] According to application number 202310608178.3, a sealing performance detection device for a transformer oil tank is disclosed, comprising a body, a detection groove being vertically opened on the upper surface of the body; a hollow plate being provided in the detection groove, L-shaped clamping plates being horizontally slidably arranged on both the left and right sides of the hollow plate, a sliding groove being vertically opened on the upper surface of the clamping plate, a resisting plate being vertically slidably arranged in the sliding groove, the resisting plate being locked by a locking assembly, two first mounting plates being fixedly mounted on the surface of the hollow plate, a first threaded rod having opposite thread directions on the left and right sides being rotatably mounted between the two first mounting plates, sliders being symmetrically threadedly sleeved on the first threaded rod, and the two sliders being fixedly connected to the two clamping plates respectively;

[0004] The existing sealing detection device cannot quickly fix the oil tank to be tested according to its size, and because the oil tank is located in water, the user can only judge whether the oil tank is leaking from the water surface, and the leakage point of the oil tank cannot be accurately observed. Therefore, we propose a transformer cover sealing detection device. Summary of the Invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, the present application aims to provide a structure that can be raised and lowered and adapted to different sizes.

[0006] A transformer cover sealing detection device includes an oil tank, an oil inlet pipe is fixedly connected to the lower left part of the front end surface of the oil tank, an oil outlet pipe is fixedly connected to the lower right part of the front end surface of the oil tank, a lifting device is provided in the middle of the upper end surface of the oil tank, a supporting frame is fixedly connected in the middle of the lifting device, a locking device is fixedly connected in the middle of the left and right end surfaces of the inner cavity of the supporting frame, a box body is installed on the bottom end surface of the inner cavity of the supporting frame, and the left and right end surfaces of the box body are in contact with the left and right locking devices.

[0007] According to the technical solution provided in the embodiment of the present application, the lifting device includes a servo motor, a screw rod, a fixed shell, a connecting plate and a limit rod. The middle parts of the left and right sides of the upper end surface of the oil tank are fixedly connected to the fixed shell. The top end surface of the fixed shell on the left is fixedly connected to the servo motor. The motor shaft of the servo motor extends through and extends to the inner cavity of the fixed shell on the left and is fixedly connected to the screw rod. The end of the screw rod is movably connected to the bottom end surface of the inner cavity of the fixed shell on the left, and the inner cavity of the fixed shell on the right is longitudinally fixedly connected to the limit rod. The outer walls of the middle parts of the screw rod and the limit rod are both sleeved with connecting plates, and the opposite surfaces of the left and right connecting plates are respectively fixedly connected to the left and right end surfaces of the supporting frame.

[0008] According to the technical solution provided in the embodiment of the present application, the width of the connecting plate matches the width of the inner cavity of the fixed shell, and the connecting plate on the left is threadedly connected to the screw rod.

[0009] According to the technical solution provided in the embodiment of the present application, the locking device includes a rubber plate, a fixed plate, a telescopic rod and a return spring. The telescopic rods are evenly fixedly connected at the transverse center lines of the left and right end surfaces of the inner cavity of the load-bearing frame, the ends of the telescopic rods are fixedly connected to the fixed plates, and a return spring is sleeved on the outside of the telescopic rods. One end of the return spring is fixedly connected to the left and right end surfaces of the inner cavity of the load-bearing frame, and the other end of the return spring is fixedly connected to the end surface away from the fixed plate, and the rubber plate is fixedly connected to the end surface close to the fixed plate.

[0010] According to the technical solution provided in the embodiment of the present application, an air pump is fixedly connected to the middle of the upper end surface of the box body, and an air guide pipe is fixedly connected to the air outlet of the air pump, and the end of the air guide pipe extends through the upper part of the inner cavity of the box body.

[0011] According to the technical solution provided in the embodiment of the present application, the bottom end surface of the supporting frame is evenly provided with through openings, the bottom end surface of the supporting frame is evenly fixedly connected with support bars, and a box is placed on the upper end surface of the support bar.

[0012] In summary, the present application discloses a transformer cover sealing detection device.

[0013] Beneficial effects:

[0014] 1. Through the lifting device, load-bearing frame, through-port and support bar, the lifting device drives the left and right connecting plates to rise and fall, thereby driving the load-bearing frame to rise and fall, ensuring that the box body enters the oil tank for sealing detection. Through the cooperation of the through-port and support bar, the sealing of the lower end surface of the box body can be conveniently detected.

[0015] 2. Through the locking device, air pump and air duct, the locking device is supported by the elastic potential energy of the reset spring and the telescopic rod to ensure that the rubber plate can stably lock the box, ensure the stability of the box, and effectively prevent the box from floating. Through the air pump and air duct, the sealing between the cover and the box can be detected, and the air leak can be observed through the water flow traces. Use the air pump to continue pressurizing and observe the position of bubbles generated on the surface of the box to determine the air leak. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0017] Figure 1 This is a schematic diagram of the transformer cover sealing detection device in this application;

[0018] Figure 2 It is a schematic cross-sectional view of the transformer cover sealing detection device in this application.

[0019] In the figure: 1. Oil tank; 2. Oil inlet pipe; 3. Oil outlet pipe; 4. Lifting device; 41. Servo motor; 42. Screw rod; 43. Fixed housing; 44. Connecting plate; 45. Limit rod; 5. Carrying frame; 6. Locking device; 61. Rubber plate; 62. Fixed plate; 63. Telescopic rod; 64. Return spring; 7. Box body; 8. Through port; 9. Support bar; 10. Air pump; 11. Air guide pipe. DETAILED DESCRIPTION

[0020] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the relevant invention and are not intended to limit the invention. It should also be noted that, for ease of description, only portions relevant to the invention are shown in the accompanying drawings.

[0021] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0022] As mentioned in the background technology, the sealing detection device in the prior art cannot be quickly fixed according to the size of the oil tank to be tested, and because when the oil tank is located in water, the user can only judge whether the oil tank is leaking from the water surface, and the leakage point of the oil tank cannot be accurately observed. Therefore, the present disclosure proposes a structure that can be raised and lowered and adapted to different sizes.

[0023] Example 1

[0024] See also Figure 1A transformer cover sealing detection device includes an oil tank 1. In order to facilitate the replenishment of the oil tank 1, an oil inlet pipe 2 is fixedly connected to the lower left part of the front end surface of the oil tank 1. In order to facilitate the storage of oil and prevent the oil from being contaminated, an oil outlet pipe 3 is fixedly connected to the lower right part of the front end surface of the oil tank 1. In order to facilitate the lifting and lowering of the box body 7 for sealing detection, a lifting device 4 is provided in the middle of the upper end surface of the oil tank 1, and the lifting device 4 can facilitate the placement of the box body 7.

[0025] See also Figure 1 In order to facilitate the placement of the box body 7, a supporting frame 5 is fixedly connected to the middle part of the lifting device 4, and the supporting frame 5 is groove-shaped, which is convenient for taking out or placing the box body 7 from the front and back sides. In order to prevent the box body 7 from floating upward due to the buoyancy of the oil when entering the oil tank 1, a locking device 6 is fixedly connected to the middle part of the left and right end surfaces of the inner cavity of the supporting frame 5. The locking device 6 can fix the left and right end surfaces of the box body 7. The box body 7 is installed on the bottom end surface of the inner cavity of the supporting frame 5, and the left and right end surfaces of the box body 7 are in contact with the left and right locking devices 6, effectively ensuring the stability of the box body 7.

[0026] See also Figure 2 In order to facilitate the placement of the box body 7 in the inner cavity of the oil tank 1 for sealing detection, a lifting device 4 is composed of a servo motor 41, a screw rod 42, a fixed shell 43, a connecting plate 44 and a limit rod 45. The fixed shells 43 are fixedly connected to the middle parts of the left and right sides of the upper end surface of the oil tank 1, and the fixed shells 43 are in a groove structure, and the openings of the fixed shells 43 are opposite to each other. The servo motor 41 is fixedly connected to the top surface of the left fixed shell 43, and the motor shaft of the servo motor 41 extends through the inner cavity of the left fixed shell 43 and is fixedly connected to the screw rod 42, and the end of the screw rod 42 is movably connected to the bottom end surface of the inner cavity of the left fixed shell 43, and the limit rod 45 is longitudinally fixedly connected to the inner cavity of the right fixed shell 43. Connecting plates 44 are sleeved on the outer walls of the middle parts of the screw rod 42 and the limiting rod 45, and the opposite surfaces of the left and right connecting plates 44 are fixedly connected to the left and right end surfaces of the supporting frame 5 respectively to ensure the stability of the supporting frame 5.

[0027] See also Figure 2 In order to prevent the connecting plate 44 from rotating, the width of the connecting plate 44 matches the width of the inner cavity of the fixed shell 43, and the left connecting plate 44 is threadedly connected to the screw rod 42 to ensure that the screw rod 42 rotates, which can drive the left connecting plate 44 to rise and fall, and through the limiting rod 45 and the supporting frame 5, drive the right connecting plate 44 to rise and fall at the same time.

[0028] See also Figure 2In order to ensure the stability of the box body 7 and prevent the box body 7 from floating up due to buoyancy, a locking device 6 is composed of a rubber plate 61, a fixed plate 62, a telescopic rod 63 and a return spring 64. The telescopic rods 63 are evenly fixedly connected at the transverse center lines of the left and right end surfaces of the inner cavity of the load-bearing frame 5, and the fixed plate 62 is fixedly connected to the end of the telescopic rod 63. A return spring 64 is sleeved on the outside of the telescopic rod 63, and one end of the return spring 64 is fixedly connected to the left and right end surfaces of the inner cavity of the load-bearing frame 5, and the other end of the return spring 64 is fixedly connected to the end surface away from the fixed plate 62. In order to increase the friction between the fixed plate 62 and the box body 7, a rubber plate 61 is fixedly connected to the end surface close to the fixed plate 62.

[0029] See also Figure 2 In order to detect the sealing between the upper end cover of the box body 7 and the box body 7, an air pump 10 is fixedly connected to the middle of the upper end surface of the box body 7, and the air outlet of the air pump 10 is fixedly connected to an air guide pipe 11, and the end of the air guide pipe 11 extends through the upper part of the inner cavity of the box body 7. When the gap between the cover and the box body 7 is large and the leakage cannot be observed through the water flow traces, the air pump 10 is used to continue to pressurize and observe the position of bubbles generated on the surface of the box body 7 to determine the leakage.

[0030] Example 2

[0031] See also Figure 1 In order to allow the supporting frame 5 and the box body 7 to sink into the inner cavity of the oil tank 1, the oil cannot detect the lower part of the box body 7, or the oil cannot penetrate into the bottom of the supporting frame 5, resulting in oil overflow. Through holes 8 are evenly opened on the bottom end surface of the supporting frame 5 to facilitate the flow of oil. In order to facilitate the detection and observation of whether there is any leakage at the bottom of the box body 7, support bars 9 are evenly fixedly connected to the bottom end surface of the supporting frame 5, and the box body 7 is placed on the upper end surface of the support bar 9.

[0032] Working principle: when in use, the box body 7 to be tested is placed on the upper end surface of the support bar 9 of the bottom end surface of the inner cavity of the supporting frame 5. In order to adapt to the size of the box body 7, the fixing plates 62 are pulled to both sides, and reset by the return spring 64 and the telescopic rod 63, driving the fixing plates 62 and the rubber plates 61 to move closer to the inside, ensuring that the rubber plates on both sides fit the left and right end surfaces of the box body 7 to ensure the stability of the box body 7. By connecting with an external power supply, starting the servo motor 41, the servo motor 41 drives the screw rod 42 to rotate, and the limit rod 45 and the supporting frame 5 are limited. The screw rod 42 rotates to drive the left and right connecting plates 44 to rise and fall, and the connecting plates 44 drive the supporting frame 5 to rise and fall, and the supporting frame 5 drives the box body 7 to rise and fall. When the box body 7 enters the oil tank 1, the leakage of the box body 7 can be understood by observing the generation of bubbles. When the gap between the cover plate and the box body 7 is large and the leakage cannot be observed by the water flow marks, the air pump 10 is used to continue pressurizing and the position of the bubbles generated on the surface of the box body 7 is observed to determine the leakage.

[0033] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention herein is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features having similar functions disclosed in this application.

Claims

1. A transformer cover sealing detection device, comprising an oil tank (1), characterized in that: The lower left portion of the front end face of the oil tank (1) is fixedly connected to an oil inlet pipe (2), the lower right portion of the front end face of the oil tank (1) is fixedly connected to an oil outlet pipe (3), the middle portion of the upper end face of the oil tank (1) is provided with a lifting device (4), the middle portion of the lifting device (4) is fixedly connected to a supporting frame (5), the middle portions of the left and right end faces of the inner cavity of the supporting frame (5) are fixedly connected to a locking device (6), the bottom end face of the inner cavity of the supporting frame (5) is installed with a box body (7), and the left and right end faces of the box body (7) are in contact with the left and right locking devices (6).

2. The transformer cover sealing detection device according to claim 1, characterized in that: The lifting device (4) comprises a servo motor (41), a screw rod (42), a fixed housing (43), a connecting plate (44) and a limiting rod (45). The middle parts of the left and right sides of the upper end surface of the oil tank (1) are fixedly connected to the fixed housing (43). The top end surface of the left fixed housing (43) is fixedly connected to the servo motor (41). The motor shaft of the servo motor (41) extends through the inner cavity of the left fixed housing (43) and is fixedly connected to the screw rod (42). The end of the screw rod (42) is movably connected to the bottom end surface of the inner cavity of the left fixed housing (43). The inner cavity of the right fixed housing (43) is longitudinally fixedly connected to the limiting rod (45). The outer walls of the middle parts of the screw rod (42) and the limiting rod (45) are both sleeved with connecting plates (44). The opposite surfaces of the left and right connecting plates (44) are fixedly connected to the left and right end surfaces of the supporting frame (5) respectively.

3. The transformer cover sealing detection device according to claim 2, characterized in that: The width of the connecting plate (44) matches the width of the inner cavity of the fixed housing (43), and the left connecting plate (44) is threadedly connected to the screw rod (42).

4. The transformer cover sealing detection device according to claim 1, characterized in that: The locking device (6) comprises a rubber plate (61), a fixed plate (62), a telescopic rod (63) and a return spring (64); the telescopic rod (63) is evenly fixedly connected to the transverse center line of the left and right end surfaces of the inner cavity of the supporting frame (5); the end of the telescopic rod (63) is fixedly connected to the fixed plate (62); the outer surface of the telescopic rod (63) is covered with a return spring (64); one end of the return spring (64) is fixedly connected to the left and right end surfaces of the inner cavity of the supporting frame (5); the other end of the return spring (64) is fixedly connected to an end surface away from the fixed plate (62); and the rubber plate (61) is fixedly connected to an end surface close to the fixed plate (62).

5. The transformer cover sealing detection device according to claim 1, characterized in that: An air pump (10) is fixedly connected to the middle of the upper end surface of the box body (7), and an air outlet of the air pump (10) is fixedly connected to an air guide pipe (11), and the end of the air guide pipe (11) extends through the upper part of the inner cavity of the box body (7).

6. The transformer cover sealing detection device according to claim 1, characterized in that: The bottom end surface of the supporting frame (5) is evenly provided with through openings (8), the bottom end surface of the supporting frame (5) is evenly fixedly connected with support bars (9), and the upper end surface of the support bars (9) is provided with a box body (7).

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