Threading hole structure of low-pressure test box

Abstract

The utility model discloses a threading hole structure of a low-pressure test box. The threading hole structure comprises a hubbed flange plate, a switching cylinder and a connecting plug, wherein one end of the switching cylinder is provided with a plate-type flange plate, and the other end of the switching cylinder is provided with a bulge; the protruding end of the hubbed flange plate is embedded in the threading hole of the box wall, and the plate-type flange plate of the switching cylinder is fixedly connected with the hubbed flange plate through a bolt. According to the utility model, the connecting plug can be replaced at will according to actual requirements, and only the inner diameter of the connecting plug is matched with the diameter of a cable or a wire to be subjected to pipe penetration, so that a plurality of defects caused by large difference between the diameter of a threading hole of a traditional low-pressure box and the diameter of the cable or the wire to be subjected to pipe penetration can be effectively overcome.

Description

Technical Field

[0001] The utility model belongs to the field of low-pressure box testing, in particular to a wire threading hole structure of 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. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned defects of the existing low-pressure test box due to the excessively large diameter of the threading holes, and to provide a low-pressure box threading hole structure.

[0004] The purpose of the utility model is achieved by the following technical scheme: a low-pressure test box wire hole structure, including a neck flange, a plate flange at one end, a connecting tube with a protrusion at the other end, and a plug connector with a protrusion at one end; the protruding end of the neck flange is embedded in the wire hole of the box wall, the plate flange of the connecting tube is fixedly connected to the neck flange by bolts, the protrusion of the connecting tube and the protrusion of the plug connector are arranged opposite to each other, and a sealing ring is also provided between the two protrusions; the protrusion of the connecting tube and the protrusion of the plug connector are fixedly connected by fasteners.

[0005] Furthermore, the inner diameter of the adapter tube is the same as the inner diameter of the neck flange, and the inner diameter of the plug connector is smaller than the inner diameter of the adapter tube.

[0006] To ensure smooth threading, the neck flange and the adapter tube are located on the same straight line with the central axis of the plug connector.

[0007] In order to facilitate the rapid replacement of the plug connector, the fastener is preferably implemented by a quick clamp.

[0008] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0009] (1) The plug connector of the present invention can be replaced at will according to actual needs. It only needs to match the inner diameter of the plug connector with the diameter of the cable or wire to be passed through the pipe. This can effectively overcome the many defects caused by the large difference in diameter between the wire hole of the traditional low-pressure box and the cable or wire to be passed through the pipe.

[0010] (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.

[0011] (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 a suitable plug connector can be quickly matched according to the diameter of the cable or wire, and the gap between the cable or wire to be threaded and the inner wall of the plug connector can be minimized to ensure the test effect of the low-pressure test chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0013] Figure 2 This is a schematic structural diagram of the quick clamp of the present utility model.

[0014] The designations of the reference numerals in the above drawings are:

[0015] 1—box wall, 2—neck flange, 3—plate flange, 4—adapter, 5—sealing ring, 6—plug connector, 7—protrusion, 8—quick clamp. DETAILED DESCRIPTION

[0016] 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.

[0017] Example

[0018] 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 neck 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 neck flange 2 needs to match the inner diameter of the threading hole on the chamber wall 1. After the protruding end of the neck flange 2 is embedded in the threading hole, the gap left by the protruding end needs to be filled with sealant to ensure the tightness and sealing of this part.

[0019] A protrusion 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 and screw hole distribution position of the plate flange 3 must be consistent with the size and screw hole distribution position of the neck flange 2 to ensure that the plate flange 3 can be fastened to the neck flange 2 by bolts, so that the adapter tube 4 can be fixedly connected to the box wall 1 to form a whole.

[0020] A protrusion 7 is provided at one end of the plug connector 6. This protrusion 7 must match the size of the protrusion 7 on the adapter tube 4. Furthermore, the outer diameter of the plug connector 6 should be as close as possible to the outer diameter of the adapter tube 4 to ensure overall aesthetics. The inner diameter of the plug connector 6 should be as close as possible to the outer diameter of the cable or wire to be piped through. The inner diameter of the plug connector 6 should also be smaller than the inner diameters of the adapter tube 4 and the neck flange 2. However, the inner diameter of the adapter tube 4 should be the same as the inner diameter of the neck flange 2.

[0021] During connection, the protrusion 7 of the plug connector 6 is positioned opposite the protrusion 7 of the adapter tube 4, and a sealing ring 5 is placed between the two protrusions 7. After the protrusion 7 of the plug connector 6 and the protrusion 7 of the adapter tube 4 are positioned opposite each other, the two protrusions 7 are fastened together using fasteners, thereby achieving a fixed connection between the plug connector 6 and the adapter tube 4.

[0022] Since the inner diameter of the plug connector 6 matches the outer diameter of the cable or wire to be piped, the inner diameter of the plug connector 6 determines the outer diameter of the cable or wire to be piped. To ensure that the plug connector 6 can be quickly replaced, the fastener is preferably implemented using a quick clamp 8.

[0023] The quick clamp 8 is a common precision fastener, and its structure is as follows Figure 2 When in use, simply insert the protrusion 7 of the plug connector 6 and the protrusion 7 of the adapter tube 4 into the inner clamping end of the quick clamp 8, and then tighten the entire quick clamp 8 to quickly secure the plug connector 6 and the adapter tube 4. Conversely, simply loosen the quick clamp 8 to quickly separate the plug connector 6 and the adapter tube 4.

[0024] To ensure smooth pipe threading, after the neck flange 2, adapter tube 4 and plug connector 6 are connected in sequence, the central axes of the neck flange 2, adapter tube 4 and plug connector 6 need to be located on the same straight line.

[0025] At the same time, in order to ensure the sealing performance of the entire device, when the cable or wire to be passed through the pipe passes through the plug connector 6, if there is still a gap between the cable or wire and the inner wall of the plug connector 6, the gap needs to be sealed and filled to ensure that the low-pressure box will not encounter dangerous air pressure instability during operation.

[0026] As described above, the present invention can be well implemented.

Claims

1. A low pressure test box threading hole structure, characterized in that: It comprises a neck flange (2), a switching tube (4) provided with a plate flange (3) at one end and a protrusion (7) at the other end, and a plug connector (6) provided with the protrusion (7) at one end; the protruding end of the neck flange (2) is embedded in the threading hole of the box wall (1), the plate flange (3) of the switching tube (4) is fixedly connected to the neck flange (2) by bolts, the protrusion (7) of the switching tube (4) and the protrusion of the plug connector (6) are arranged opposite to each other, and a sealing ring (5) is further provided between the two protrusions (7); the protrusion (7) of the switching tube (4) and the protrusion (7) of the plug connector (6) are fixedly connected by fasteners.

2. The low pressure test box threading hole structure according to claim 1, characterized in that: The inner diameter of the adapter tube (4) is the same as the inner diameter of the neck flange (2), and the inner diameter of the plug connector (6) is smaller than the inner diameter of the adapter tube (4).

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

4. The low pressure test box threading hole structure according to claim 3, characterized in that: The fastener is a quick clamp (8).

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