Combined mutual inductor box body sealing performance detection device

Abstract

The utility model discloses a combined mutual inductor box sealing performance detection device which comprises a detection box, a sealing box cover is installed at an opening of the top surface of the detection box in an attached mode, and a bearing frame is welded to the bottom surface of the sealing box cover. The motor at the top of the lifting shell is started to work, so that the motor drives the screw rod at the output end of the motor to rotate, the left side face of the sealing box cover is connected with the screw rod through the threaded sleeve, and the right side face of the sealing box cover is in sliding connection with the sliding rods in the guide shell through the sliding sleeves; the threaded sleeve drives the sealing box cover to ascend / descend synchronously in the stage that the threaded sleeve moves along the surface of the threaded rod, and the lifting stability of the sealing box cover is maintained in the mode that the sliding rods and the sliding sleeves slide, so that on one hand, the sealing performance of the detection box in the air-tight sealing detection stage is guaranteed, and meanwhile, the opening in the top face of the detection box is rapidly opened and closed; on the other hand, feeding and discharging of the combined mutual inductor box body are easily achieved through lifting of the bearing frame.

Description

Technical Field

[0001] This utility model relates to the technical field of airtightness testing equipment, and in particular to a device for testing the airtightness of a combined current transformer housing. Background Technology

[0002] A combined instrument transformer enclosure is a protective enclosure for power equipment that integrates current transformers (CTs), voltage transformers (PTs), and measuring instruments. It is mainly used for high-voltage power metering and system monitoring, and also has electrical isolation and physical protection functions.

[0003] Currently, during the production process of combined instrument transformer enclosures, in order to provide a physical barrier to prevent personnel from directly contacting high-voltage components and to reduce the corrosion of internal components by environmental dust and moisture, the combined instrument transformer enclosures need to have sufficient airtightness. Therefore, airtightness testing equipment is required to test the sealing performance. However, the airtightness testing equipment on the market usually uses the water immersion method for airtightness testing, which has the problems of long testing time, inconvenient loading and unloading, and difficulty in completely removing moisture after testing.

[0004] To address this issue, a combined current transformer housing sealing test device is proposed, which has the advantages of rapid airtightness testing and convenient loading and unloading, thereby solving the problems mentioned in the background technology. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a combined current transformer housing sealing performance testing device.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a combined current transformer housing sealing performance testing device, including a testing box, a sealing cover fitted to the opening on the top surface of the testing box, a bearing frame welded to the bottom surface of the sealing cover, and a rubber sealing ring pasted on the edge of the sealing cover; a lifting shell welded to the left side wall of the testing box, and a motor fixedly installed on the top of the lifting shell; a screw fixed to the output end of the motor via a coupling, and a threaded sleeve threadedly connected to the portion of the screw extending into the lifting shell; one end of the threaded sleeve penetrating the lifting shell and connecting to the left side of the sealing cover; a guide shell welded to the right side wall of the testing box, and several sliding rods fixed inside the guide shell; a sliding sleeve fitted onto the surface of each sliding rod, and the sliding sleeve penetrating the guide shell and connecting to the right side of the sealing cover; a vacuum pump installed on the lower surface of the testing box, and a vacuum tube connected to the testing box at one end of the vacuum pump; and a pressure gauge installed on the outer surface of the testing box.

[0007] As a further description of the above technical solution: the bearing frame is U-shaped, and a back plate is welded to the lower back of the bearing frame corresponding to the combined transformer box.

[0008] As a further description of the above technical solution: the lifting shell has a receiving cavity corresponding to the screw, and the surface of the lifting shell has a first opening that communicates with the receiving cavity.

[0009] As a further description of the above technical solution: the surface of the guide shell is provided with a plurality of second openings, and the positions of the plurality of second openings correspond to the installation positions of a plurality of slide rods respectively.

[0010] As a further description of the above technical solution: the lengths of several sliding rods are all matched with the length of the screw, and the several sliding rods are arranged in parallel with the screw.

[0011] As a further description of the above technical solution: an exhaust pipe is installed on the surface of the detection box, and an electric valve is installed on the surface of the exhaust pipe.

[0012] This utility model has the following beneficial effects:

[0013] In this invention, by starting the motor at the top of the lifting housing, the motor drives the screw at its output end to rotate. Since the left side of the sealing box cover is connected to the screw through a threaded sleeve, and the right side of the sealing box cover is slidably connected to several sliding rods in the guide housing through several sliding sleeves, as the screw rotates, the threaded sleeve moves along the surface of the screw, driving the sealing box cover to rise / fall synchronously. The stability of the lifting and lowering of the sealing box cover is maintained by the sliding of several sliding rods and several sliding sleeves. In this way, on the one hand, the airtightness of the test box is guaranteed during the airtightness test stage, while the top opening of the test box can be opened and closed quickly. On the other hand, it is easy to load and unload the combined current transformer box by lifting the support frame.

[0014] In this invention, a vacuum pump, a vacuum tube, and a pressure gauge are installed on the side wall of the testing chamber. By starting the vacuum pump, air is drawn from inside the testing chamber through the vacuum tube. During this process, the pressure gauge monitors the air pressure inside the testing chamber in real time. Under the same vacuuming time, the sealing performance of the combined transformer housing can be tested by observing the pressure gauge reading, thereby improving the efficiency of the combined transformer housing sealing performance test. Moreover, unlike the traditional water immersion test method, this method avoids the situation where moisture is difficult to completely remove from the combined transformer housing after testing. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the combined current transformer housing sealing test device of this utility model;

[0016] Figure 2 A 3D view of the sealed box lid;

[0017] Figure 3 This is a 3D view of the lifting shell;

[0018] Figure 4 This is a schematic diagram of the guide shell structure.

[0019] Legend:

[0020] 1. Testing box; 2. Sealed box cover; 3. Rubber sealing ring; 4. Bearing frame; 5. Lifting shell; 6. Guide shell; 7. Vacuum pump; 8. Vacuum tube; 9. Motor; 10. Screw; 11. Threaded sleeve; 12. Sliding rod; 13. Sliding sleeve; 14. Pressure gauge; 15. First opening; 16. Second opening. Detailed Implementation

[0021] 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.

[0022] According to an embodiment of the present invention, a device for detecting the sealing performance of a combined current transformer housing is provided.

[0023] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figure 1-4As shown, the combined transformer housing sealing test device according to an embodiment of the present invention includes a test box 1. A sealing box cover 2 is fitted to the open top surface of the test box 1, and a bearing frame 4 is welded to the bottom surface of the sealing box cover 2. A rubber sealing ring 3 is attached to the edge of the sealing box cover 2. A lifting shell 5 is welded to the left side wall of the test box 1, and a motor 9 is fixedly installed on the top of the lifting shell 5. A screw 10 is fixed to the output end of the motor 9 through a coupling, and a threaded sleeve 11 is threadedly connected to the part of the screw 10 extending into the interior of the lifting shell 5. One end of the threaded sleeve 11 passes through the lifting shell 5 and connects to the left side of the sealing box cover 2. A guide shell 6 is welded to the right side wall of the test box 1, and several sliding rods 12 are fixed inside the guide shell 6. A sliding sleeve 13 is fitted onto the surface of each sliding rod 12, and the sliding sleeve 13 passes through the guide shell 6 and connects to the right side of the sealing box cover 2. The test box 1 is connected to the test box 1. A vacuum pump 7 is installed on the lower surface of the test box 1, and a vacuum tube 8 connected to the test box 1 is provided at one end of the vacuum tube. A pressure gauge 14 is installed on the outer surface of the test box 1. The control method of the motor 9 and the vacuum pump 7 in this utility model is to control them by manually starting and stopping the switch. The wiring diagram of the power components and the supply of power are common knowledge in this field. Since this utility model is mainly used to protect mechanical devices, the control method and wiring layout will not be explained in detail. The air tightness test of this device is based on the following: under the same vacuuming time and the same size combined transformer box, if the value of the pressure gauge 14 continues to increase after the vacuuming time, the air tightness of the combined transformer box is qualified. If the value of the pressure gauge 14 changes relatively little after the vacuuming time, the air tightness of the combined transformer box is unqualified.

[0024] In one embodiment, the support frame 4 has an overall U-shaped structure, and a back plate is welded to the back of the lower part of the support frame 4 corresponding to the combined current transformer box. This structure provides back support for the combined current transformer box inside the support frame 4, increasing the stability of the installation.

[0025] In one embodiment, a receiving cavity is provided inside the lifting housing 5 corresponding to the screw 10, and a first opening 15 communicating with the receiving cavity is provided on the surface of the lifting housing 5. This structure facilitates the installation of the screw 10, and the setting of the first opening 15 makes it easy to make way for the lifting of the threaded sleeve 11.

[0026] In one embodiment, the surface of the guide shell 6 is provided with a plurality of second openings 16, and the positions of the plurality of second openings 16 correspond to the installation positions of a plurality of slide rods 12 respectively. With this structure, it is easy to make way for a plurality of slide sleeves 13.

[0027] In one embodiment, the lengths of several slide rods 12 are matched with the length of screw 10, and the slide rods 12 and screw 10 are arranged in parallel. With this structure, it is easy to maintain the smoothness of the lifting and lowering of the sealing box cover 2.

[0028] In one embodiment, an exhaust pipe is mounted on the surface of the test chamber 1, and an electric valve is mounted on the surface of the exhaust pipe. The exhaust pipe and the electric valve are located on the back of the test chamber 1 (not shown in the figure) and are used to restore the internal and external air pressure of the test chamber 1 after vacuuming.

[0029] Working principle:

[0030] In use, the current transformer housing to be tested is first placed in the support frame 4. The motor 9 at the top of the lifting housing 5 is then activated, causing the motor 9 to rotate the screw 10 at its output end. Since the left side of the sealing cover 2 is connected to the screw 10 via a threaded sleeve 11, and the right side of the sealing cover 2 is slidably connected to several sliding rods 12 inside the guide housing 6 via several sliding sleeves 13, as the screw 10 rotates, the threaded sleeve 11 moves along the surface of the screw 10, causing the sealing cover 2 to descend synchronously. The smoothness of the lifting and lowering of the sealing cover 2 is maintained by the sliding of several sliding rods 12 and several sliding sleeves 13 until the sealing cover 2 is in contact with the test... The opening of box 1 is sealed with a rubber sealing ring 3. When testing for air tightness, the vacuum pump 7 is started, causing the vacuum pump 7 to extract air from the inside of test box 1 through the vacuum tube 8. During this process, the pressure value inside test box 1 is monitored in real time by pressure gauge 14. Under the same vacuuming time, the air tightness of the combined transformer box can be tested by observing the value of pressure gauge 14. If the value of pressure gauge 14 continues to increase after one end of the vacuuming time, the air tightness of the combined transformer box is qualified. If the value of pressure gauge 14 changes relatively little after one end of the vacuuming time, the air tightness of the combined transformer box is unqualified.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A combined current transformer enclosure sealing performance testing device, comprising a testing box (1), characterized in that: A sealing cover (2) is fitted to the opening on the top surface of the test box (1), and a bearing frame (4) is welded to the bottom surface of the sealing cover (2). A rubber sealing ring (3) is pasted on the edge of the sealing cover (2). A lifting shell (5) is welded to the left side wall of the test box (1), and a motor (9) is fixedly installed on the top of the lifting shell (5). A screw (10) is fixed to the output end of the motor (9) through a coupling, and a threaded sleeve (11) is threaded to the part of the screw (10) that extends into the lifting shell (5). One end of the threaded sleeve (11) penetrates the lifting shell. (5) Connected to the left side of the sealing box cover (2), the right side wall of the test box (1) is welded with a guide shell (6), and several sliding rods (12) are fixed inside the guide shell (6). Each sliding rod (12) is fitted with a sliding sleeve (13), and the sliding sleeve (13) passes through the guide shell (6) and connects to the right side of the sealing box cover (2). A vacuum pump (7) is installed on the lower surface of the test box (1), and a vacuum tube (8) connected to the test box (1) is provided at one end of the vacuum pump. A pressure gauge (14) is installed on the outer surface of the test box (1).

2. The combined current transformer enclosure sealing performance testing device according to claim 1, characterized in that: The bearing frame (4) has a U-shaped structure, and the back of the lower part of the bearing frame (4) is welded with a back plate corresponding to the combined transformer box.

3. The combined current transformer enclosure sealing performance testing device according to claim 1, characterized in that: The lifting shell (5) has a cavity corresponding to the screw (10) inside, and the surface of the lifting shell (5) has a first opening (15) that communicates with the cavity.

4. The combined current transformer enclosure sealing performance testing device according to claim 1, characterized in that: The surface of the guide shell (6) is provided with a plurality of second openings (16), and the positions of the plurality of second openings (16) correspond to the installation positions of a plurality of slide rods (12).

5. The combined current transformer enclosure sealing performance testing device according to claim 1, characterized in that: The lengths of several slide rods (12) are matched with the length of screw (10), and the slide rods (12) and screw (10) are arranged in parallel.

6. The combined current transformer enclosure sealing performance testing device according to claim 1, characterized in that: The surface of the test box (1) is equipped with an exhaust pipe, and an electric valve is installed on the surface of the exhaust pipe.

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