Simulation device for detecting elastic property of sealing ring of transformer

Abstract

The utility model relates to a transformer sealing ring elastic performance detection simulation device, which comprises a detection box body, the upper end of the detection box body is provided with an opening and is sealed through a sealing cover plate, each side plate of the detection box body is provided with a sealing ring pressing assembly, and each sealing ring pressing assembly comprises a pressing flange and a detection blind plate. Wherein the detection blind plate is arranged on a corresponding side plate of the detection box body, a through hole is formed in the middle of the detection blind plate and communicated with the interior of the detection box body, a sealing ring groove is formed in the detection blind plate around the through hole in the middle, and after a sealing ring to be detected is arranged in the sealing ring groove, the pressing flange is fixedly arranged on the detection blind plate; the diameters of the sealing ring grooves in the detection blind plates of the side plates are different, and the sealing cover plate is provided with a vacuumizing opening which is plugged by a plug. According to the utility model, the vacuum state of the transformer oil tank can be simulated, and the compression simulation state of sealing rings with various sizes and specifications when the sealing rings are installed on the oil tank can be realized at one time.

Description

Technical Field

[0001] This utility model relates to the field of transformer sealing ring performance testing, specifically a transformer sealing ring elastic performance testing simulation device. Background Technology

[0002] A sealing ring is an insulating elastic element used for sealing, moisture protection, and dust prevention in transformers. Its performance is crucial to the reliability and stability of transformer operation. Furthermore, during transformer assembly, the elasticity of the sealing ring is used to tighten fasteners between transformer components and the tank wall, determining the sealing effect of the tank wall. After the transformer is put into operation, due to significant internal temperature variations, the elasticity of the sealing ring must maintain long-term sealing performance to ensure the safe operation of the transformer. Insufficient elasticity of the sealing ring over a long period can lead to transformer oil leakage and, in severe cases, even transformer malfunction.

[0003] In the existing technology, sealing rings are usually purchased finished products. After the finished products arrive at the factory, the inspection personnel are usually responsible for inspecting the appearance quality, size and other aspects of the sealing rings. However, the existing technology lacks long-term simulation testing of the elastic performance of sealing rings, especially the long-term elastic performance testing of sealing rings under certain pressure. Therefore, the existing technology cannot effectively determine the long-term endurance of the elastic performance of sealing rings, which may bring certain hidden dangers to the long-term operation of transformer products.

[0004] Existing technologies primarily focus on sealing tests of transformer components to assess their long-term operational reliability. For example, patent CN104198125B discloses a method for monitoring the sealing performance of transformer bushings. This method involves setting up a device to simulate the sealing state of transformer bushings, injecting oil into the device, sealing it, then evacuating the system and injecting SF6 gas into the device to test the sealing condition. The device also simulates poor sealing and water ingress by sealing the oil inlet and dripping water into the device. Additionally, some existing technologies include devices specifically designed to test the elasticity of elastic elements. For instance, patent CN221959712U discloses an elasticity testing device for elastic washers, capable of measuring and obtaining the elastic force curve of a spring washer under compression. However, since transformer sealing rings are typically installed at various mounting points on the oil tank, and their dimensions need to match those of related components, multiple sizes of sealing rings are often required on the same oil tank. Therefore, the aforementioned devices are not suitable for simulating and testing transformer sealing rings to obtain their long-term elasticity under certain pressure. Utility Model Content

[0005] The purpose of this invention is to provide a transformer sealing ring elastic performance testing simulation device, which can simulate the vacuum state of the transformer oil tank and simultaneously simulate the pressure state when sealing rings of various sizes and specifications are installed on the oil tank, thereby obtaining the long-term elastic performance of sealing rings of different specifications under certain pressure.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A transformer sealing ring elastic performance testing simulation device includes a testing chamber with an open top sealed by a sealing cover. Each side plate of the testing chamber is provided with a sealing ring clamping assembly, which includes a clamping flange and a testing blind plate. The testing blind plate is located on the corresponding side plate of the testing chamber and has a through hole in the middle that communicates with the interior of the testing chamber. A sealing ring groove is provided around the through hole in the middle of the testing blind plate. After the sealing ring to be tested is placed in the sealing ring groove, the clamping flange is fixed to the testing blind plate. The diameter of the sealing ring groove on the testing blind plate of each side plate is different. The sealing cover is provided with a vacuum port that is blocked by a plug.

[0008] The detection box is a square box. The detection box is provided with a first detection blind plate, a second detection blind plate, a third detection blind plate and a fourth detection blind plate in sequence on each side plate along the circumference. The area and the diameter of the central through hole of the first detection blind plate, the second detection blind plate, the third detection blind plate and the fourth detection blind plate are all different.

[0009] The outer side of the upper opening of the detection box is provided with a box edge, and the outer edge of the sealing cover is provided with a vertical cover baffle. The sealing cover is fixed to the box edge by a connecting assembly, and a box sealing ring is provided between the sealing cover and the box edge, wherein the box sealing ring is located at the inner end of the box edge, and the cover baffle is located at the outer side of the box edge.

[0010] The outer end of the box is provided with a supporting cylinder that contacts the sealing cover plate, and the diameter of the supporting cylinder is smaller than the diameter of the box sealing ring. The connecting component is located between the supporting cylinder and the box sealing ring.

[0011] The upper side of the sealing cover is provided with a lifting ring.

[0012] The testing box is mounted on a support, and the lower end of the support is equipped with self-locking casters.

[0013] The bracket is provided with an mounting plate at its upper end, and the bottom plate of the detection box is fixed to the mounting plate.

[0014] The advantages and positive effects of this utility model are as follows:

[0015] 1. The detection box of this utility model can simulate the vacuum state of the transformer oil tank, and the sealing ring clamping components on each side plate of the detection box can simulate the pressure state when sealing rings of different sizes and specifications are installed on the oil tank. Thus, the pressure simulation state when sealing rings of various sizes and specifications are installed on the oil tank can be realized at one time, thereby obtaining the long-term elastic performance of sealing rings of different specifications under certain pressure.

[0016] 2. The sealing ring compression assembly of this utility model includes a compression flange and a detection blind plate. The detection blind plate is located on the corresponding side plate of the detection box and has a through hole in the middle that communicates with the inside of the detection box, thereby simulating the corresponding installation position on the transformer tank. The compression flange applies a certain pressure to the sealing ring on the detection blind plate to simulate the long-term pressure state of the sealing ring. The compression flange is easy to install and remove, and the gap between it and the detection blind plate can be detected by plug gauge or other tools, thereby ensuring that the compression of the sealing ring under test meets the test requirements.

[0017] 3. The detection box of this utility model is mounted on a movable support, which ensures a simple and compact overall structure while allowing for flexible movement according to actual needs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall design of this utility model.

[0019] Figure 2 for Figure 1 Cross-sectional view of the front and rear directions of the detection chamber.

[0020] Figure 3 for Figure 1 Cross-sectional view of the detection chamber from left to right.

[0021] Figure 4 for Figure 1 Front view of the first blind flange in the test.

[0022] Figure 5 for Figure 4 Front view of the second blind flange in the middle.

[0023] Figure 6 for Figure 4 Front view of the third inspection blind flange.

[0024] Figure 7 for Figure 4 Top view of the detection chamber.

[0025] Wherein, 1 is the testing chamber, 101 is the first clamping flange, 102 is the first testing blind flange, 103 is the positioning element, 104 is the second clamping flange, 105 is the second testing blind flange, 106 is the bottom plate of the chamber, 107 is the third clamping flange, 108 is the third testing blind flange, 109 is the edge of the chamber, 110 is the supporting cylinder, 111 is the fourth clamping flange, 112 is the fourth testing blind flange, 2 is the sealing cover, 201 is the lifting ring, 202 is the plug, 203 is the cover baffle, 3 is the bracket, 301 is the mounting plate, 302 is the self-locking moving wheel, 4 is the sealing ring to be tested, 5 is the connecting assembly, and 6 is the sealing ring of the chamber. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings.

[0027] like Figures 1-7 As shown, this utility model includes a detection chamber 1, and the upper end of the detection chamber 1 is open and sealed by a sealing cover plate 2. Each side plate of the detection chamber 1 is provided with a sealing ring pressing assembly, and the sealing ring pressing assembly includes a pressing flange and a detection blind plate. The detection blind plate is provided on the corresponding side plate of the detection chamber 1 and has a through hole in the middle that communicates with the interior of the detection chamber 1. A sealing ring groove is provided around the through hole in the middle of the detection blind plate. After the sealing ring 4 to be tested is placed in the sealing ring groove, the pressing flange is fixed on the detection blind plate and presses the sealing ring 4 to be tested. The diameter of the sealing ring groove on the detection blind plate of each side plate is different. The sealing cover plate 2 is provided with a vacuum port that is blocked by a plug 202.

[0028] In use, different sizes of the sealing rings 4 to be tested are respectively placed in the sealing ring grooves on the corresponding test blind plates and respectively pressed and fixed by the corresponding clamping flanges. Then, the plug 202 on the sealing cover plate 2 is removed and the vacuum port is connected to the vacuum equipment to evacuate the inside of the test chamber 1 to the required vacuum degree. After the test chamber 1 is placed for the set test time, each sealing ring 4 to be tested is removed and its elastic performance is tested. This determines whether the long-term elastic performance of each sealing ring 4 under a certain pressure (applied by the clamping flange) meets the requirements. The elastic performance test can be judged by the size change of the sealing ring 4 to be tested, or by using relevant equipment (such as the elastic testing device in patent CN221959712U) to obtain the elastic performance curve of the sealing ring 4 to be tested. This is a well-known technology in the field. In addition, the sealing ring 4 to be tested in this utility model is mainly used at various installation ports on the tank wall. During testing, the vacuum state inside the transformer tank can be simulated by simply drawing a vacuum. The sealing cover plate 2 can also be further equipped with an oil filling port with a plug according to actual needs. In this way, oil can be injected into the test box 1 during testing to further simulate the state of the transformer tank.

[0029] like Figures 1-7 As shown, in this embodiment, the detection box 1 is a square box. Along the circumferential direction, the detection box 1 has a first detection blind plate 102, a second detection blind plate 105, a third detection blind plate 108, and a fourth detection blind plate 112 sequentially arranged on each side plate. Furthermore, the areas, central through-hole diameters, and sealing ring groove diameters of the first detection blind plate 102, second detection blind plate 105, third detection blind plate 108, and fourth detection blind plate 112 are all different. For example… Figure 4 and Figure 5 As shown, in this embodiment, the first detection blind plate 102 is square in shape, and the second detection blind plate 105 is circular in shape. The diameter of the through hole in the middle and the diameter of the sealing ring groove are different. Figure 4 and Figure 6 As shown, in this embodiment, both the first detection blind plate 102 and the fourth detection blind plate 112 are square in shape, but the size and area of ​​the central through hole are different, as are the diameters of the sealing ring grooves. The shape and central through hole diameter of each detection blind plate are designed according to the corresponding mounting holes on the transformer tank, while the sealing ring groove of each detection blind plate is designed according to the corresponding sealing ring 4 to be tested. In this way, this embodiment can simultaneously realize the simulated testing of four types of sealing rings 4 to be tested, thus improving the testing efficiency.

[0030] like Figures 1-7 As shown, in this embodiment, the outer side of the first detection blind plate 102 is fixedly connected to the first clamping flange 101 by the positioning element 103; the outer side of the second detection blind plate 105 is fixedly connected to the second clamping flange 104 by the positioning element 103; the outer side of the third detection blind plate 108 is fixedly connected to the third clamping flange 107 by the positioning element 103; and the outer side of the fourth detection blind plate 112 is fixedly connected to the fourth clamping flange 111 by the positioning element 103. The shapes of the first clamping flange 101, the second clamping flange 104, the third clamping flange 107, and the fourth clamping flange 111 are designed according to the shape of the corresponding detection blind plate. The positioning element 103 can be a screw, bolt, or other positioning element as needed. In this embodiment, the first clamping flange 101, the third clamping flange 107, and the fourth clamping flange 111 have relatively small areas and are connected to the corresponding detection blind plate by screws; the second clamping flange 104 has relatively large areas and is connected to the corresponding detection blind plate by bolts or screws evenly distributed in the circumferential direction.

[0031] like Figures 2-3As shown, in this embodiment, the outer side of the upper opening of the detection chamber 1 is provided with a horizontal chamber rim 109, and the outer edge of the sealing cover 2 is provided with a downwardly vertical cover baffle 203. The sealing cover 2 is fixed to the chamber rim 109 by a connecting assembly 5, and a chamber sealing ring 6 is provided between the sealing cover 2 and the chamber rim 109. The chamber sealing ring 6 is located at the inner end of the chamber rim 109 to ensure the internal sealing of the detection chamber 1, and the cover baffle 203 is located on the outer side of the chamber rim 109 to provide protection. In this embodiment, the connecting assembly 5 can be a bolt and nut assembly.

[0032] like Figures 2-3 As shown, in this embodiment, a supporting cylinder 110 is provided at the outer end of the box edge 109 to contact the sealing cover plate 2 to ensure that the sealing cover plate 2 is horizontal as a whole. At the same time, the diameter of the supporting cylinder 110 is smaller than the diameter of the box sealing ring 6 to ensure that the box sealing ring 6 can be fully pressed by the sealing cover plate 2 to ensure a seal. In this embodiment, the supporting cylinder 110 is made of round steel.

[0033] like Figures 2-3 As shown in this embodiment, the upper side of the sealing cover plate 2 is provided with a lifting ring 201 to facilitate the overall hoisting and transfer of this utility model.

[0034] like Figures 1-3 As shown, in this embodiment, the detection box 1 is mounted on a bracket 3. The bracket 3 has an upper mounting plate 301, and the bottom plate 106 of the detection box 1 is welded and fixed to the mounting plate 301. Each leg of the bracket 3 has a self-locking caster 302 at its lower end to allow the invention to move on-site. After moving into position, the self-locking caster 302 can lock the invention in place. The self-locking caster 302 is a known technology in the art and is a commercially available product. In this embodiment, the bracket 3 has four legs. To ensure support strength, opposite legs of the bracket 3 can be connected by reinforcing plates, resulting in a total of two reinforcing plates arranged in a cross shape to ensure the support strength of the bracket 3.

[0035] The working principle of this utility model is as follows:

[0036] The following steps are included when using this utility model:

[0037] Step 1: Move this utility model to the detection area;

[0038] Step 2: Remove each clamping flange from its corresponding test blind plate, and then place the test sealing rings 5 ​​of different sizes and specifications into the sealing ring grooves on the corresponding test blind plates. At this time, a small amount of glue can be applied to temporarily fix the test sealing rings 5 ​​as needed. Then, reinstall each clamping flange on its corresponding test blind plate and press the corresponding test sealing rings 5 ​​together. At this time, the gap between the clamping flange and the test blind plate can be checked by plug gauge or other tools to ensure that the compression of the test sealing rings 5 ​​meets the test requirements. This is a well-known technology in the field.

[0039] Step 3: Remove the plug 202 from the sealing cover 203 and connect the vacuum port to the vacuum equipment, which is a technology known in the art;

[0040] Step 4: Start the vacuum equipment to evacuate the inside of the test chamber 1 to the required vacuum level, and then place the test chamber 1 for a set time. The inside of the test chamber 1 can be equipped with a vacuum detection element (such as a vacuum gauge) as needed to detect whether the vacuum level inside the chamber meets the requirements in real time. If the requirements are not met, the vacuum equipment can be started to ensure that the vacuum level inside the chamber always meets the simulated test requirements. The vacuum detection element is a commercially available product.

[0041] Step 5: After the test chamber 1 has been placed for a set time, remove each of the test sealing rings 4 and test whether the long-term elastic performance under a certain pressure (applied by the clamping flange) meets the requirements.

[0042] Additionally, when the inside of the inspection chamber 1 needs cleaning, the sealing cover 203 can be opened.

Claims

1. A simulation device for testing the elastic performance of transformer sealing rings, characterized in that: The test chamber (1) is included, and the upper end of the test chamber (1) is open and sealed by a sealing cover plate (2). Each side plate of the test chamber (1) is provided with a sealing ring clamping assembly, and the sealing ring clamping assembly includes a clamping flange and a test blind plate. The test blind plate is provided on the corresponding side plate of the test chamber (1) and has a through hole in the middle that communicates with the inside of the test chamber (1). The test blind plate has a sealing ring groove around the through hole in the middle. After the sealing ring (4) to be tested is placed in the sealing ring groove, the clamping flange is fixed on the test blind plate. The diameter of the sealing ring groove on the test blind plate of each side plate is different. The sealing cover plate (2) is provided with a vacuum port that is blocked by a plug (202).

2. The transformer sealing ring elastic performance testing simulation device according to claim 1, characterized in that: The detection box (1) is a square box. The detection box (1) is provided with a first detection blind plate (102), a second detection blind plate (105), a third detection blind plate (108) and a fourth detection blind plate (112) in sequence on each side plate along the circumferential direction. The area and the diameter of the central through hole of the first detection blind plate (102), the second detection blind plate (105), the third detection blind plate (108) and the fourth detection blind plate (112) are all different.

3. The transformer sealing ring elastic performance testing simulation device according to claim 1, characterized in that: The detection box (1) has a box edge (109) on the outer side of the upper opening. The sealing cover (2) has a vertical cover baffle (203) on its outer edge. The sealing cover (2) is fixed to the box edge (109) by a connecting component (5). A box sealing ring (6) is provided between the sealing cover (2) and the box edge (109). The box sealing ring (6) is located at the inner end of the box edge (109), and the cover baffle (203) is located on the outer side of the box edge (109).

4. The transformer sealing ring elastic performance testing simulation device according to claim 3, characterized in that: The outer end of the box edge (109) is provided with a supporting cylinder (110) that contacts the sealing cover plate (2), and the diameter of the supporting cylinder (110) is smaller than the diameter of the box sealing ring (6). The connecting component (5) is located between the supporting cylinder (110) and the box sealing ring (6).

5. The transformer sealing ring elastic performance testing simulation device according to claim 1, characterized in that: The sealing cover (2) is provided with a lifting ring (201) on the upper side.

6. The transformer sealing ring elastic performance testing simulation device according to claim 1, characterized in that: The detection box (1) is mounted on a bracket (3), and the lower end of the bracket (3) is provided with a self-locking moving wheel (302).

7. The transformer sealing ring elastic performance testing simulation device according to claim 6, characterized in that: The bracket (3) is provided with an mounting plate (301) at its upper end, and the bottom plate (106) of the detection box (1) is fixed on the mounting plate (301).

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