Detachable threading hole structure for low-pressure test box

Abstract

The utility model discloses a detachable threading hole structure for a low-pressure test box, which comprises an inner flange plate with a neck, an adapter cylinder with one end provided with a plate-type flange plate and the other end provided with a bulged disc, and a connecting plug with one end provided with a bulged disc and the other end provided with a plate-type flange plate, and the bulged end of the inner flange plate with the neck is embedded in a threading hole of a box wall. According to the utility model, the plug is arranged inside the connecting plug, and a cable or an electric wire to be perforated can directly penetrate through the plug, so that not only can the perforation requirements of cables or electric wires with various diameters be well met, but also many defects caused by overlarge threading holes of a traditional low-pressure box can be effectively overcome after penetration.

Description

Technical Field

[0001] The utility model belongs to the field of low-pressure box testing, and particularly relates to a detachable wire threading hole structure for a low-pressure test box. Background Art

[0002] Low-pressure test chambers are primarily used in the aviation, aerospace, information technology, and electronics industries to test the adaptability and reliability of instruments, electrical products, materials, components, and equipment under low pressure, high temperature, or low temperature, either individually or simultaneously. Low-pressure test chambers can also measure electrical performance parameters of test pieces while powered on. They consist of an insulated enclosure (pressure-bearing structure) at the front, a refrigeration and vacuum unit at the rear, and an electrical controller (system) located on the chamber door. Because the electrical controllers are housed within the low-pressure test chamber, control cables or wires for the corresponding electrical devices must be routed through from the outside. However, the wire holes in traditional low-pressure test chambers are designed with fixed diameters. These holes are too large for smaller diameter wires or cables, allowing dust to enter the chamber and severely compromising its airtightness, making them unsuitable for practical applications. At the same time, when the electrical controller inside the test box needs to be replaced, the corresponding cables or wires often need to be replaced. However, since the traditional wire holes often have their gaps sealed after threading, when the cables or wires need to be replaced, the sealant of the wire holes needs to be destroyed, which is not only not conducive to quick replacement, but also easy to damage the surface of the cables or wires, which can easily lead to safety hazards. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned defects and provide a detachable wire threading hole structure for a low-pressure test box that is convenient for quick replacement of cables and can be applied to cables of various outer diameters.

[0004] The purpose of the utility model is achieved by the following technical solutions: a detachable wire threading hole structure for a low-pressure test box, comprising a neck inner flange, a switching tube with a plate flange at one end and a protruding plate at the other end, a plug connector with a protruding plate at one end and a plate flange at the other end, the protruding end of the neck inner flange being embedded in the wire threading hole of the box wall; the plate flange of the switching tube and the neck inner flange are fixedly connected by bolts, the protruding plate of the switching tube and the protruding plate of the plug connector are arranged opposite to each other, and a sealing ring is provided between the two protruding plates; the protruding plate of the switching tube and the protruding plate of the plug connector are connected by fasteners; a plug is provided inside the plug connector, and a neck outer flange is provided on one side of the plate flange of the plug connector, and the neck outer flange is fixedly connected to the plate flange of the plug connector by bolts.

[0005] Furthermore, the inner diameter of the adapter tube is the same as the inner diameter of the necked inner flange.

[0006] To ensure easy installation, the central axes of the inner flange with neck, the adapter tube, the plug connector and the outer flange with neck are all located on the same straight line.

[0007] To facilitate quick disassembly, the fastener is a quick clamp.

[0008] In order to achieve better use effect, the plug is made of plastic in a truncated cone shape, and the interior of the plug connector is a truncated cone-shaped through cavity that matches the shape of the plug.

[0009] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0010] (1) The plug connector of the utility model is provided with a plug inside, and the cable or wire to be pierced can directly pass through the plug. Therefore, it can not only well meet the piercing needs of cables or wires of various diameters, but also effectively overcome the many defects caused by the over-large wire threading holes of traditional low-pressure boxes after penetration.

[0011] (2) The utility model provides a sealing ring between the adapter tube and the plug connector, which can effectively ensure the airtightness of the entire low-pressure box.

[0012] (3) The adapter tube and the plug connector of the utility model are connected by a quick clamp, so the plug connector can be easily disassembled so that the appropriate plug connector can be quickly matched according to the actual situation, and the gap between the cable or wire to be threaded and the inner diameter of the plug connector can be reduced as much as possible to ensure the test effect of the low-pressure test chamber. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0014] Figure 2 It is a structural diagram of a quick clamp.

[0015] The designations of the reference numerals in the above drawings are:

[0016] 1—Box wall, 2—Inner flange with neck, 3—Plate flange, 4—Adapter sleeve, 5—Sealing ring, 6—Plug connector, 7—Protruding plate, 8—Plug, 9—Outer flange with neck, 10—Bolt, 11—Quick clamp. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below with reference to specific embodiments, but the embodiments of the present invention are not limited thereto.

[0018] Example

[0019] like Figure 1 As shown, the bottom of the low-pressure test chamber wall 1 in this embodiment is provided with a threading hole. The necked inner flange 2 is a conventional flange with a protruding end at one end and a flat surface at the other end. To ensure effective installation, the outer diameter of the protruding end of the necked inner flange 2 needs to match the inner diameter of the threading hole on the chamber wall 1. When the protruding end of the necked inner flange 2 is embedded in the threading hole of the chamber wall 1, if there is still a gap between them, the gap needs to be filled with sealant to ensure the tightness and sealing of this part.

[0020] A protruding plate 7 is provided at one end of the adapter tube 4, and a plate flange 3 is provided at the other end thereof. The size of the plate flange 3 is consistent with the size of the neck inner flange 2 to ensure that the plate flange 3 can be fastened to the neck inner flange 2 by bolts 10, so that the adapter tube 4 can be fixedly connected to the box wall 1.

[0021] A protruding plate 7 is provided at one end of the plug connector 6, and a plate flange 3 is provided at the other end. The dimensions of the protruding plate 7 of the plug connector 6 are consistent with those of the adapter tube 4. Furthermore, to ensure the overall aesthetics of this embodiment, the outer diameter of the plug connector 6 is as close as possible to that of the adapter tube 4, and the inner diameter of the adapter tube 4 is the same as that of the necked inner flange 2.

[0022] During connection, the protruding disc 7 of the plug connector 6 is positioned opposite the protruding disc 7 of the adapter tube 4, and a sealing ring 5 is placed between the two protruding discs 7. After the protruding disc 7 of the plug connector 6 and the protruding disc 7 of the adapter tube 4 are positioned opposite each other, the two protruding discs 7 are fastened together using fasteners, thereby achieving a fixed connection between the plug connector 6 and the adapter tube 4.

[0023] The interior of the plug connector 6 is a through cavity, and a plug 8 is provided inside the plug connector 6, and the cable or wire to be threaded through the pipe needs to pass through the plug 8. To ensure the use effect, the shape of the through cavity must match the shape of the plug 8. In this embodiment, the through cavity is preferably set to a truncated cone-shaped through cavity, and the plug 8 is preferably made into a truncated cone shape, so that the plug 8 can be well embedded in the through cavity of the plug connector 6. To facilitate the penetration of the cable or wire, the plug 8 is preferably made of plastic or hard foam. Alternatively, in order to avoid wasting time on penetrating the plug 8 on site, the present embodiment can also directly pre-set a through hole on the plug 8. When threading the pipe, the cable or wire to be threaded through the pipe can directly pass through the through hole. Therefore, the aperture of the through hole must match the outer diameter of the cable or wire to be threaded through the pipe.

[0024] To facilitate the secure installation of the plug 8 within the plug connector 6, a necked outer flange 9 is provided at the outer end of the plug connector 6, i.e., the end of the plug connector 6 where the plate flange 3 is provided. The shape and size of the necked outer flange 9 must correspond to the shape and size of the plate flange 3 of the plug connector 6. During the securement process, the necked outer flange 9 is connected to the plate flange 3 of the plug connector 6 via bolts 10.

[0025] In order to ensure that the plug connector 6 can be replaced quickly, the fastener is preferably implemented by a quick clamp 11. The quick clamp 11 is a common precision fastener, and its structure is as follows Figure 2 When in use, simply insert the flange 7 of the plug connector 6 and the flange 7 of the adapter tube 4 into the inner clamping end of the quick clamp 11, and then tighten the entire quick clamp 11 to quickly and securely connect the plug connector 6 and the adapter tube 4. Conversely, simply loosen the quick clamp 11 to quickly separate the plug connector 6 and the adapter tube 4.

[0026] In order to ensure smooth pipe threading and reduce the bending of the cables or wires to be threaded as much as possible, the central axes of the above-mentioned necked inner flange 2, adapter tube 4, plug connector 6 and necked outer flange 9 are all located on the same straight line.

[0027] As described above, the present invention can be well implemented.

Claims

1. A detachable wire threading hole structure for a low pressure test box, characterized in that: The invention comprises a flange with a neck (2), a switching tube (4) provided with a plate flange (3) at one end and a protruding plate (7) at the other end, and a plug connector (6) provided with a protruding plate (7) at one end and a plate flange (3) at the other end, wherein the protruding end of the flange with a neck (2) is embedded in the threading hole of the box wall (1); the plate flange (3) of the switching tube (4) and the flange with a neck (2) are fixedly connected by bolts, and the protruding plate (7) of the switching tube (4) and the plug connector ( 6) are arranged opposite to each other, and a sealing ring (5) is provided between the two protruding discs (7); the protruding disc (7) of the adapter cylinder (4) and the protruding disc (7) of the plug connector (6) are connected by fasteners; a plug (8) is provided inside the plug connector (6), and a necked outer flange (9) is provided on one side of the plate flange (3) of the plug connector (6), and the necked outer flange (9) is fixedly connected to the plate flange (3) of the plug connector (6) by bolts (10).

2. The detachable wire threading hole structure for a low pressure test box according to claim 1, characterized in that: The inner diameter of the adapter cylinder (4) is the same as the inner diameter of the necked inner flange (2).

3. A detachable wire threading hole structure for a low pressure test box according to claim 1 or 2, characterized in that: The central axes of the necked inner flange (2), the adapter tube (4), the plug connector (6), and the necked outer flange (9) are all located on the same straight line.

4. The detachable wire threading hole structure for a low pressure test box according to claim 3, characterized in that: The fastener is a quick clamp (11).

5. The detachable wire threading hole structure for a low pressure test box according to claim 3, characterized in that: The plug (8) is in the shape of a truncated cone, and the interior of the plug connector (6) is a truncated cone-shaped through cavity, which matches the shape of the plug (8).

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