Transformer air tightness test device

Abstract

The utility model discloses a transformer air tightness test device, and relates to the technical field of transformer test. The air pump comprises a workbench, a through groove is formed in the workbench, an inner cavity of the through groove is communicated with an air conveying pipe, an air pump body is arranged on one side of the workbench, one end of the air conveying pipe is communicated with the output end of the air pump body, a containing table is movably arranged on the upper surface of the workbench, and an installation assembly is arranged between the workbench and the containing table. According to the transformer shell testing device, through the pressing mechanism, a transformer shell can be conveniently and tightly pressed on the placement table during testing, the situation that the shell is not tightly attached to the placement table is avoided, and therefore the accuracy of the testing result of the testing device is guaranteed; and a placement table matched with the transformer shell needing to be detected can be flexibly replaced on the device, so that the use convenience of the test device is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to transformer test technical field, concretely is a kind of transformer air tightness test device. BACKGROUND

[0002] In power system, transformer as core equipment, plays key role such as voltage conversion, electric energy distribution and transmission, and the normal operation of transformer is important to the stability and reliability of entire power system, and the air tightness of transformer shell is one of important factors influencing its performance and service life, and in test, generally adopt to be inverted in shell on placing table and carry out inflation to air tightness test to shell inside;

[0003] However, existing transformer shell air tightness test device still has some problems when using:

[0004] Firstly, existing in the test to transformer shell, lack the structure of shell compression, lead to shell not being closely combined with placing table in the test process, and then affect the test result of test device;

[0005] Secondly, transformer shell is recessed, and the placing table of adaptive shape can shorten the time of inflating to shell inside, however, existing placing table is usually fixedly installed on test device, which makes it not possible to quickly replace adaptive placing table during test. UTILITY MODEL CONTENTS

[0006] In order to solve the problem that transformer shell cannot be closely combined with placing table during existing test and placing table in device cannot be quickly replaced, the utility model aims at providing a kind of transformer air tightness test device.

[0007] In order to solve the above technical problem, the utility model adopts the following technical scheme: a kind of transformer air tightness test device, including workbench, the inside of workbench is provided with through slot, the inner chamber of through slot is connected with gas pipe, one side of workbench is equipped with air pump body, one end of gas pipe is connected with the output end of air pump body, the upper surface of workbench is movably provided with placing table, installation assembly is arranged between workbench and placing table, the upper surface of workbench is equipped with compression assembly, the compression assembly includes the guide groove of symmetrical distribution, the guide groove is fixedly installed on the upper surface of workbench, the upper surface of guide groove is fixedly connected with shell, and the inner chamber of shell is parallelly rotatably connected with center shaft, the upper surface of shell is fixedly installed with servo motor, and the output end of servo motor penetrates shell and is fixedly connected with one of center shaft, the outer surface of center shaft is fixedly sleeved with sprocket, the sprocket is meshingly connected with chain, the bottom end of center shaft penetrates shell and is fixedly connected with lead screw, and the outer surface of lead screw is threadedly sleeved with sliding block, and the opposite side of the relative surface of sliding block is fixedly connected with compression plate.

[0008] Preferably, the mounting assembly comprises symmetrically distributed insertion rods, corresponding insertion rods are movably inserted with one side of the placement table and the workbench, and the insertion rods and one side of the workbench are jointly screwed with screws.

[0009] Compared with the prior art, the utility model has the beneficial effects that:

[0010] 1、The application is convenient for tightly pressing the transformer shell on the placement table during testing through the pressing mechanism, avoids that the shell and the placement table are not tightly attached, and thus guarantees the accuracy of the test result of the test device.

[0011] 2、The application is convenient for flexibly replacing the placement table that is adapted to the transformer shell to be detected on the device in a movable manner through the mounting assembly, and improves the convenience of use of the test device. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] Figure 2 It is a structural schematic diagram of a part of the utility model.

[0015] Figure 3 It is a structural schematic diagram of a part of the utility model.

[0016] Figure 4 It is an exploded structural schematic diagram of the utility model.

[0017] In the drawing: 1, workbench; 2, pressing assembly; 21, chain wheel; 22, screw rod; 23, sliding block; 24, pressing plate; 25, guide groove; 26, servo motor; 27, shell; 28, chain; 29, central shaft; 3, mounting assembly; 31, first clamping groove; 32, insertion rod; 33, screw; 34, second clamping groove; 35, first threaded groove; 36, second threaded groove; 4, placement table; 5, air pump body; 6, gas conveying pipe; 7, through groove; 8, through hole. DETAILED DESCRIPTION

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example: Figures 1-4 As shown, this utility model provides a transformer airtightness testing device, including a workbench 1. The workbench 1 has a through groove 7 inside, and the inner cavity of the through groove 7 is connected to an air supply pipe 6. An air pump body 5 is provided on one side of the workbench 1. One end of the air supply pipe 6 is connected to the output end of the air pump body 5. The air pump body 5 can inflate the transformer shell placed on the placement platform 4 through the air supply pipe 6 and the through groove 7, providing an air source for the airtightness test. The placement platform 4 is movably mounted on the upper surface of the workbench 1. The placement platform 4 is a rubber platform. The rubber material of the placement platform 4 has a certain elasticity, which can better contact the transformer shell and enhance the sealing performance. The upper surface of the placement platform 4 has a through hole 8 for use with the air supply pipe 6. The air supply pipe 6 is movably inserted into the through hole 8. The air supply pipe 6 and the through hole 8 on the placement platform 4 are movably inserted into each other, which facilitates installation and disassembly and ensures that the gas can smoothly enter the transformer shell through the air supply pipe 6.

[0020] An installation component 3 is provided between the workbench 1 and the placement platform 4. The installation component 3 facilitates the installation and disassembly of the placement platform 4 and allows for quick replacement of the appropriate placement platform 4. The upper surface of the workbench 1 is provided with a clamping component 2. The clamping component 2 can press the transformer shell tightly onto the placement platform 4 during the test, ensuring that the shell and the placement platform 4 fit tightly and ensuring accurate test results.

[0021] The clamping assembly 2 includes symmetrically distributed guide grooves 25, which are fixedly installed on the upper surface of the workbench 1. A housing 27 is fixedly connected to the upper surface of the guide grooves 25, and a central shaft 29 is rotatably connected to the inner cavity of the housing 27. A servo motor 26 is fixedly installed on the upper surface of the housing 27, and the output end of the servo motor 26 passes through the housing 27 and is fixedly connected to one of the central shafts 29. After the servo motor 26 is started, it drives the central shaft 29 to rotate. A sprocket 21 is fixedly sleeved on the outer surface of the central shaft 29, and a chain 28 is meshed between the sprockets 21. The bottom end of the central shaft 29 passes through the housing 27 and is fixedly connected to a lead screw 22. The sprocket 21 on the central shaft 29 drives the two lead screws 22 to rotate synchronously through the chain 28.

[0022] The bottom end of the lead screw 22 is rotationally connected with the inner cavity of the guide groove 25, ensuring the stability of the rotation of the lead screw 22, the outer surfaces of the lead screw 22 are provided with the same thread direction, and the outer surfaces of the lead screw 22 are sleeved with the sliding blocks 23, ensuring that the two sliding blocks 23 are driven by the rotation of the lead screw 22 to move up and down in the same direction, the sliding blocks 23 are slidingly connected with the inner cavity of the guide groove 25, and the guide groove 25 plays a guiding role on the sliding blocks 23, and the opposite side of the relative surface of the sliding block 23 is fixedly connected with the pressing plate 24, and the stable movement of the sliding block 23 drives the stable movement of the pressing plate 24, so that the pressing process is stable and reliable, the transformer shell and the placement table 4 are tightly fitted, and the accuracy of the structure of the test device is ensured.

[0023] The mounting assembly 3 comprises symmetrical insertion rods 32, and the insertion rods 32 are movably inserted with one side of the placement table 4 and the workbench 1, the upper surface of the placement table 4 is symmetrically provided with first clamping grooves 31 matched with the insertion rods 32, and the two sides of the workbench 1 are symmetrically provided with second clamping grooves 34 matched with the insertion rods 32, and the insertion rods 32 are movably inserted with the corresponding first clamping grooves 31 and second clamping grooves 34, the insertion rods 32 are inserted into the first clamping grooves 31 of the placement table 4 and the second clamping grooves 34 of the workbench 1, and the accuracy of the insertion position of the insertion rods 32 with the placement table 4 and the workbench 1 is ensured.

[0024] The insertion rod 32 is threadedly connected with a screw 33 on one side of the workbench 1, one side of the insertion rod 32 is provided with a first threaded groove 35 matched with the screw 33, the two sides of the workbench 1 are symmetrically provided with second threaded grooves 36 matched with the screw 33, and the screw 33 is threadedly connected with the corresponding first threaded groove 35 and second threaded groove 36, and the screw 33 is screwed into the first threaded groove 35 and second threaded groove 36 for fixation, and the reverse operation can be performed when disassembling, which facilitates quick installation and replacement of the placement table 4, improves the convenience of use of the test device, and can quickly adapt to the appropriate placement table 4 according to different transformer shells.

[0025] Working principle: first, according to the shape and size of the transformer shell to be detected, select the appropriate placement table 4, install the placement table 4 on the workbench 1 through the mounting assembly 3, insert the insertion rods 32 into the first clamping grooves 31 and second clamping grooves 34 respectively, and then screw the screws 33 into the corresponding first threaded grooves 35 and second threaded grooves 36, realize the fixed connection of the insertion rods 32 with the workbench 1, and complete the installation of the placement table 4, which is simple and convenient to operate.

[0026] After the placement table 4 is installed, the transformer shell to be detected is placed on the placement table 4 at an appropriate position.

[0027] Then, start servo motor 26 in compression assembly 2, the output end of servo motor 26 drives the rotation of the center shaft 29 fixedly connected with it, and synchronous rotation of the two center shafts 29 is realized through the cooperation of sprocket 21 and chain 28, screw rod 22 rotates with center shaft 29 and the screw thread direction on the outer surface of screw rod 22 is the same, when the two screw rods 22 rotate synchronously, drive the sliding block 23 to slide in the guide groove 25, the sliding block 23 moves and drives the compression plate 24 to move, the compression plate 24 tightly presses the transformer shell on the placing table 4, ensures that the shell is tightly attached to the placing table 4 and provides good sealing conditions for air tightness test.

[0028] Then, open air pump body 5, the gas generated by air pump body 5 is transported to the inside of the transformer shell through gas conveying pipe 6, through through slot 7 inside workbench 1 and through hole 8 on placing table 4, through slot 7 and through hole 8 provide a through channel for gas conveying pipe 6, after a certain pressure gas is filled into the transformer shell, keep for a period of time, observe whether there is gas leakage phenomenon around the transformer shell, so as to judge whether the air tightness of the transformer shell is qualified.

[0029] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A transformer tightness testing device comprising a worktable (1), characterized in that: The inner part of the workbench (1) is provided with a through groove (7), the inner cavity of the through groove (7) is provided with a gas conveying pipe (6), one side of the workbench (1) is provided with an air pump body (5), one end of the gas conveying pipe (6) is communicated with the output end of the air pump body (5), the upper surface of the workbench (1) is movably provided with a placing table (4), the workbench (1) and the placing table (4) are provided with a mounting assembly (3), and the upper surface of the workbench (1) is provided with a pressing assembly (2). The pressing assembly (2) comprises symmetrically distributed guide grooves (25), the guide grooves (25) are fixedly installed on the upper surface of the workbench (1), the upper surface of the guide groove (25) is fixedly connected with a shell (27), and the inner cavity of the shell (27) is rotatably connected with a center shaft (29), the upper surface of the shell (27) is fixedly installed with a servo motor (26), and the output end of the servo motor (26) penetrates the shell (27) and is fixedly connected with one of the center shafts (29), the outer surface of the center shaft (29) is fixedly sleeved with a chain wheel (21), the chain wheels (21) are meshingly connected with a chain (28), the bottom end of the center shaft (29) penetrates the shell (27) and is fixedly connected with a lead screw (22), and the outer surface of the lead screw (22) is threadedly sleeved with a sliding block (23), and the opposite side of the sliding block (23) is fixedly connected with a pressing plate (24).

2. The transformer gas tightness test device according to claim 1, characterized in that: The mounting assembly (3) comprises symmetrically distributed insertion rods (32), and the insertion rods (32) are movably inserted into the placing table (4) and one side of the workbench (1).

3. The transformer gas tightness test device of claim 1, wherein: The upper surface of the placing table (4) is provided with a through hole (8) matched with the gas conveying pipe (6), and the gas conveying pipe (6) is movably inserted into the through hole (8).

4. The transformer gas tightness test device of claim 1, wherein: The bottom end of the lead screw (22) is rotatably connected with the inner cavity of the guide groove (25), and the outer surfaces of the lead screw (22) are arranged in the same screw direction.

5. The transformer gas tightness test device of claim 1, wherein: The sliding block (23) is slidably connected with the inner cavity of the guide groove (25).

6. The transformer gas tightness test device of claim 1, wherein: The placing table (4) is a rubber table.

7. The transformer gas tightness test device of claim 2, wherein: The upper surface of the placing table (4) is symmetrically provided with a first clamping groove (31) matched with the insertion rod (32), and the two sides of the workbench (1) are symmetrically provided with a second clamping groove (34) matched with the insertion rod (32).

8. The transformer gas tightness test device of claim 2, wherein: One side of the insertion rod (32) is provided with a first threaded groove (35) matched with the screw (33), and the two sides of the workbench (1) are symmetrically provided with a second threaded groove (36) matched with the screw (33), and the screw (33) is threadedly connected with the corresponding first threaded groove (35) and second threaded groove (36).

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