Shielding device for electrical calibration

Abstract

The utility model discloses a shielding device for electrical calibration, which belongs to the field of electrical calibration and comprises a movable box body, a cavity is arranged on the upper surface of the movable box body, an electrical shielding tube interface is fixedly mounted on the front surface of the movable box body, a through hole is arranged on one side of the electrical shielding tube interface, and a through hole is formed in the other side of the electrical shielding tube interface. A through hole in one side of the electric shielding pipe connector penetrates into the movable box body, a cover plate is connected to the upper surface of the movable box body in a penetrating mode, an inserting part is arranged on one side of the lower surface of the cover plate, a finger-shaped part is arranged on the other side of the lower surface of the cover plate and is of an arc-shaped structure, and the lower surface of the inserting part is connected to the inner side wall of the movable box body in a penetrating mode. The cover plate is stably and fixedly installed on the surface of the movable box body through the two acting points, a stable, reliable and convenient-to-disassemble structure is constructed, a continuous and stable protection environment is provided for precise elements in the box body, the risk of equipment failures caused by environmental factors is greatly reduced, daily protection requirements are met, and emergency maintenance convenience is achieved.

Description

Technical Field

[0001] This utility model relates to the field of electrical school calibration technology, specifically a shielding device for electrical school calibration. Background Technology

[0002] In today's era of rapid technological development, electronic devices and electrical systems have become deeply integrated into all aspects of people's lives and production. From smartphones and smart home appliances in the civilian sector to automated production lines and smart grids in the industrial sector, and even military communications and aerospace electronic equipment, all rely on precise electrical calibration to maintain their reliable operation and performance optimization. As a result, electrical calibration work has become increasingly crucial, and correspondingly, stringent requirements have been placed on the control of the electromagnetic environment in which calibration work takes place. This is the important background for the emergence of shielding devices for electrical calibration.

[0003] In existing electrical calibration methods, when calibrating a high-precision oscilloscope, the instantaneous electromagnetic pulse generated by a nearby mobile phone call can cause the oscilloscope waveform to jitter, resulting in inaccurate measurement data. This forces the calibration work to be interrupted, requiring a lot of manpower and time for recalibration, which greatly reduces calibration efficiency and the reliability of the results.

[0004] In the past, simple shielding materials such as metal foil and wire mesh were often used to deal with electromagnetic interference. Metal foil is thin and light. Although it has a certain ability to reflect high-frequency electromagnetic waves, it is easily damaged and has poor sealing. Electromagnetic waves can easily penetrate into the interior through the gaps. Furthermore, because the shielding room has a fixed space and a large volume, it is inconvenient to move the equipment in and out, and it is not suitable for frequent field calibration or multi-site distributed calibration needs.

[0005] Therefore, this utility model provides a shielding device for electrical school certification to solve the above problems. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] This invention provides a shielding device for electrical school certification, which aims to solve the problems mentioned in the background art.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model provides the following technical solution: It includes a movable box body, the upper surface of which is provided with a cavity. An electrical shielding tube interface is fixedly installed on the front of the movable box body. A through hole is provided on one side of the electrical shielding tube interface, extending through the interior of the movable box body. A cover plate is connected through the upper surface of the movable box body. A plug-in portion is provided on one side of the lower surface of the cover plate, and a finger-shaped portion is provided on the other side of the lower surface of the cover plate. The finger-shaped portion has an arc-shaped structure. The lower surface of the plug-in portion is connected through the inner wall of the movable box body. One arc-shaped end of the finger-shaped portion abuts against the back of the movable box body. A shielding box is fixedly installed on the inner bottom wall of the movable box body, and a shielding sealing mechanism is fixedly installed on one side of the shielding box.

[0010] As a preferred technical solution of this application, the shielding and sealing mechanism includes a straight tube sleeve fixedly installed on one side of the shielding box, with an external thread on one edge of the outer arc surface of the straight tube sleeve and a placement cavity on the inner arc surface of the straight tube sleeve.

[0011] As a preferred technical solution of this application, a sealing outer ring is movably sleeved on the outer arc surface of the straight pipe sleeve, and the inner arc surface of the sealing outer ring is provided with an internal thread, which is adapted to the external thread of the straight pipe sleeve.

[0012] As a preferred technical solution of this application, the inner arc surface of the placement cavity is movably fitted with a sealing inner ring, and a concave groove is provided on one side of the outer arc surface of the sealing inner ring. A sealing ring is fitted on the inner arc surface of the concave groove, and the outer arc surface of the sealing ring is attached to the inner arc surface of the straight tube sleeve.

[0013] As a preferred technical solution of this application, an anti-rotation protrusion is provided on the other side of the outer arc surface of the sealing inner ring, and the top of the anti-rotation protrusion abuts against the internal thread of the sealing outer ring.

[0014] As a preferred technical solution of this application, a gland head is sleeved on one side of the outer arc surface of the sealing outer ring, and a through hole is opened on one side surface of the gland head, extending into the interior of the straight tube sleeve.

[0015] As a preferred technical solution of this application, the inner arc surface of the straight tube sleeve has a corner ring iron core, and the outer arc surface of the corner ring iron core is movably sleeved with a shielding spring, and the outer arc surface of the shielding spring is attached to the inner arc surface of the straight tube sleeve.

[0016] (III) Beneficial Effects

[0017] 1. The cover plate is firmly fixed to the surface of the movable box by two force points, which creates a stable, reliable and easy-to-disassemble structure. This provides a continuous and stable protective environment for the precision components inside the box, greatly reducing the risk of equipment failure caused by environmental factors, and facilitating daily protection needs and emergency maintenance.

[0018] 2. Through the sealing and shielding system of the inner sealing ring, outer sealing ring and sealing ring working together, the connecting wires are protected from electromagnetic interference during the electrical calibration process, ensuring that the calibration data is accurate and reliable. Attached Figure Description

[0019] Figure 1 A schematic diagram of the overall structure of a movable box for a shielding device used in electrical schools;

[0020] Figure 2 This is an exploded structural diagram of a shielding device used in electrical engineering schools.

[0021] Figure 3 A schematic cross-sectional view of the shielding and sealing mechanism of a shielding device for use in electrical schools.

[0022] Figure 4 A schematic diagram showing the disassembly structure of the shielding sealing mechanism of a shielding device for use in electrical schools.

[0023] Figure 5 This is a schematic diagram of the overall planar section structure of a shielding device used in electrical school certification.

[0024] In the picture:

[0025] 1. Movable housing; 2. Electrically shielded tube interface; 3. Cover plate; 301. Insertion part; 302. Finger-shaped part; 4. Shielding box; 5. Shielding sealing mechanism; 501. Straight tube sleeve; 502. External thread; 503. Placement cavity; 504. Sealing outer ring; 505. Internal thread; 506. Sealing inner ring; 507. Sealing ring; 508. Anti-rotation protrusion; 509. Gland head; 6. Angle ring core; 7. Shielding spring. Detailed Implementation

[0026] 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.

[0027] This utility model provides a shielding device for electrical school certification, such as... Figures 1 to 5As shown, the device includes a movable box 1, with a cavity on its upper surface. An electrical shielding tube interface 2 is fixedly installed on the front of the movable box 1. A through hole is provided on one side of the electrical shielding tube interface 2, extending into the interior of the movable box 1. A cover plate 3 is connected through the upper surface of the movable box 1. A plug-in part 301 is provided on one side of the lower surface of the cover plate 3, and a finger-shaped part 302 is provided on the other side of the lower surface of the cover plate 3. The finger-shaped part 302 has an arc-shaped structure. The lower surface of the plug-in part 301 is connected through the inner wall of the movable box 1. One arc-shaped end of the finger-shaped part 302 abuts against the back of the movable box 1. A shielding box 4 is fixedly installed on the inner bottom wall of the movable box 1, and a shielding sealing mechanism 5 is fixedly installed on one side of the shielding box 4.

[0028] The cover plate 3 of the mobile box 1 is designed to be detachable, which greatly facilitates the daily maintenance and troubleshooting of the shielding box 4. When a sudden failure occurs inside the shielding box 4, technicians can quickly remove the cover plate 3 and disassemble and repair the internal body in a timely and efficient manner. The reason why the cover plate 3 and the mobile box 1 can be easily disassembled and securely connected is that the cover plate 3 has a carefully constructed insertion part 301 and a finger-shaped part 302 on both sides. In the initial state, the insertion part 301 is tilted outward, which reserves deformation space for subsequent insertion. When the cover plate 3 is inserted into the cavity inside the mobile box 1, the inner wall of the cavity applies pressure to the insertion part 301. Due to its own flexibility and plasticity, the insertion part 301 deforms to fit the inner wall of the cavity. The top of the deformed insertion part 301 abuts against the inner side wall of the mobile box 1. With the help of the reverse force given by the side wall, the position of the cover plate 3 is initially locked.

[0029] Meanwhile, the finger-shaped part 302 located at the rear end is made of a molded elastic element. When the finger-shaped part 302 touches the back of the movable box 1, its own elasticity instantly and tightly adheres to the surface of the movable box 1, maximizing the contact area and friction. With the abutment force of the plug part 301 on the side wall and the adhesion elasticity of the finger-shaped part 302 on the back, the cover plate 3 is firmly fixed to the surface of the movable box 1 from two force points, forming a stable, reliable and easy-to-disassemble connection mode, which is convenient for daily protection needs and emergency maintenance.

[0030] The shielding and sealing mechanism 5 includes a straight tube sleeve 501 fixedly installed on one side of the shielding box 4. An external thread 502 is provided on one edge of the outer arc surface of the straight tube sleeve 501. A placement cavity 503 is provided on the inner arc surface of the straight tube sleeve 501. A sealing outer ring 504 is movably sleeved on the outer arc surface of the straight tube sleeve 501. An internal thread 505 is provided on the inner arc surface of the sealing outer ring 504, and the internal thread 505 is adapted to the external thread 502 of the straight tube sleeve 501. A sealing inner ring 506 is movably sleeved on the inner arc surface of the placement cavity 503. A concave groove is provided on one side of the outer arc surface of the sealing inner ring 506, and a sealing... The outer arc surface of the sealing ring 507 is attached to the inner arc surface of the straight tube sleeve 501. The other side of the outer arc surface of the inner sealing ring 506 is provided with an anti-rotation protrusion 508. The top of the anti-rotation protrusion 508 abuts against the internal thread 505 of the outer sealing ring 504. A gland head 509 is sleeved on one side of the outer arc surface of the outer sealing ring 504. A through hole is opened on one side surface of the gland head 509 and extends into the interior of the straight tube sleeve 501. An inner arc surface corner ring core 6 of the straight tube sleeve 501 is movably sleeved with a shielding spring 7. The outer arc surface of the shielding spring 7 is attached to the inner arc surface of the straight tube sleeve 501.

[0031] During the calibration process, the connecting wire is inserted into the straight tube sleeve 501. The built-in sealing inner ring 506, with its flexible material, tightly wraps the wire, effectively filling any tiny gaps that may exist between the wire and the inner wall of the straight tube sleeve 501. It connects the shielding wire and the shielding spring 7, expanding under the diameter of the wire, thus initially constructing a solid sealing barrier to prevent external electromagnetic interference from quietly seeping in.

[0032] Meanwhile, the outer sealing ring 504, located on the outside, gradually approaches the straight tube sleeve 501 under the threaded structure. As the threads tighten, the outer sealing ring 504 continues to shift until its front bent end abuts against the outer arc surface of the wire. The tight fit between this bent end and the outer surface of the wire not only further compresses potential gaps and strengthens the sealing effect, but also provides stable support to the wire from the outside, preventing it from becoming loose or shifting. The sealing ring 507 is fitted onto the outer arc surface of the inner sealing ring 506. When tightly nested within the inner sealing ring 506, it uses its own elastic deformation to fit the remaining tiny gaps between the inner sealing ring 506 and the wire and straight tube sleeve 501, completely isolating external electromagnetic interference and achieving a seamless sealing protection effect. Through the sealing and shielding system under the synergistic structure of the inner sealing ring 506, the outer sealing ring 504, and the sealing ring 507, the connection wire is protected from electromagnetic interference during electrical calibration, ensuring accurate and reliable calibration data.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A shielding device for electrical school certification, comprising a movable housing (1), characterized in that: The upper surface of the movable box (1) is provided with a cavity. An electric shielding tube interface (2) is fixedly installed on the front of the movable box (1). A through hole is provided on one side of the electric shielding tube interface (2). The through hole on one side of the electric shielding tube interface (2) extends into the interior of the movable box (1). A cover plate (3) is connected through the upper surface of the movable box (1). A plug-in part (301) is provided on one side of the lower surface of the cover plate (3). A finger-shaped part (302) is provided on the other side of the lower surface of the cover plate (3). The finger-shaped part (302) has an arc-shaped structure. The lower surface of the plug-in part (301) is connected through the inner wall of the movable box (1). The arc-shaped end of one side of the finger-shaped part (302) abuts against the back of the movable box (1). A shielding box (4) is fixedly installed on the inner bottom wall of the movable box (1). A shielding sealing mechanism (5) is fixedly installed on one side of the shielding box (4).

2. The shielding device for electrical school certification according to claim 1, characterized in that: The shielding and sealing mechanism (5) includes a straight tube sleeve (501) fixedly installed on one side of the shielding box (4). The straight tube sleeve (501) has an external thread (502) on one edge of the outer arc surface and a placement cavity (503) on the inner arc surface of the straight tube sleeve (501).

3. A shielding device for electrical school certification according to claim 2, characterized in that: A sealing outer ring (504) is movably sleeved on the outer arc surface of the straight pipe sleeve (501). The inner arc surface of the sealing outer ring (504) is provided with an internal thread (505), which is adapted to the external thread (502) of the straight pipe sleeve (501).

4. A shielding device for electrical school certification according to claim 3, characterized in that: The inner arc surface of the placement cavity (503) is movably fitted with a sealing inner ring (506). The outer arc surface of the sealing inner ring (506) is provided with a concave groove. The inner arc surface of the concave groove is fitted with a sealing ring (507). The outer arc surface of the sealing ring (507) is attached to the inner arc surface of the straight tube sleeve (501).

5. A shielding device for electrical school certification according to claim 4, characterized in that: The outer arc surface of the inner sealing ring (506) is provided with an anti-rotation protrusion (508), and the top of the anti-rotation protrusion (508) abuts against the internal thread (505) of the outer sealing ring (504).

6. A shielding device for electrical school certification according to claim 3, characterized in that: A gland head (509) is fitted onto one side of the outer arc surface of the sealing outer ring (504). A through hole is opened on one side surface of the gland head (509) and extends into the interior of the straight tube sleeve (501).

7. A shielding device for electrical school certification according to claim 6, characterized in that: The inner arc surface of the straight tube sleeve (501) has a corner ring core (6), and the outer arc surface of the corner ring core (6) is movably sleeved with a shielding spring (7), and the outer arc surface of the shielding spring (7) is attached to the inner arc surface of the straight tube sleeve (501).

Images