Low-pressure test box switching device

Abstract

The utility model provides a low pressure test chamber switching device, which comprises an adapter body, a test chamber wall and screws, rubber strips are arranged on two sides of the middle section of the adapter body, a plurality of outer joints are arranged at the top end of the adapter body, and a plurality of inner joints are arranged at the bottom end of the adapter body. Blocking rings are arranged on the upper portion and the lower portion of the middle section of the adapter body, a sealing assembly is arranged between the two blocking rings, a mounting ring is arranged on the upper portion of the adapter body, a power module and an air pressure sensor are arranged at the top end of the mounting ring, a miniature air pump is arranged at the top end of the air pressure sensor, and the mounting ring is fixed to the wall of a test box through screws. The low-pressure test box switching device has excellent sealing performance, is very convenient to mount and dismount, can be connected with a plurality of wires at the same time, can effectively carry out switching when detection of different instruments is needed, and can also prevent the joints from loosening and slipping in the test process.

Description

Technical Field

[0001] The utility model relates to the field of electrical equipment detection, and more specifically, to a low-pressure test box switching device. Background Art

[0002] When the atmospheric pressure decreases, the mechanical and electrical properties of electrical equipment will be greatly affected, and the impact of low pressure on the product cannot be simulated under normal atmospheric conditions. Therefore, it is necessary to carry out low-pressure tests in a low-pressure test chamber. During the test, the device under test in the test chamber needs to be wired and connected with the tester outside the test chamber to measure the electrical performance parameters of the device under test during the test. Therefore, the low-pressure test chamber will have a channel for the cable to pass through. In order to ensure the low-pressure environment inside the low-pressure test chamber, the cable channel and the gaps between the cables need to be sealed with a large amount of sealant or vacuum mud. On the one hand, this sealing method is cumbersome to operate and prone to leakage, and sealant and vacuum mud are disposable products, which results in high cost of low-pressure testing.

[0003] In view of the above problems, as for the technical problems that the existing use of sealants and vacuum mud for plugging is cumbersome, prone to leakage, and has high cost, after a lot of searches, a low-pressure test box adapter device with patent number CN216595350U was found, which includes a detachable base arranged on the outside of the test box body, the main cross-section of the base is T-shaped, and a fitting sealing ring is arranged between the large head end of the base and the side plate of the test box body, and the large head end of the base is provided with a first wire hole coaxial with the reserved hole on the test box body; the small head end of the base is provided with a connecting hole, and the peripheral wall of the connecting hole is provided with an internal thread and the inner diameter of the connecting hole is larger than the inner diameter of the first wire hole; the base is fixedly provided with an extrusion sealing ring with a ring-shaped cross-section at the inner end of the connecting hole, and the inside of the extrusion sealing ring is filled with inert gas; however, the technical solution provided by the patent still has the following problems:

[0004] When the low-pressure test device is connected to an external test device, it is usually necessary to connect multiple joints, and multiple wiring holes need to be set in the adapter. However, the adapter is only provided with a single wiring hole, which cannot fully meet the actual application requirements. In addition, the adapter achieves the sealing effect by using a compression screw sleeve to extrude the sealing ring to deform. When multiple wiring holes are set, the installation process of the adapter will be more cumbersome, and the sealing ring will also squeeze the compression screw sleeve, making it difficult to disassemble the compression screw sleeve. Utility Model Content

[0005] The utility model aims to solve the technical problems raised by the above-mentioned background technology and provides a low-pressure test box adapter device, which has multiple sets of joints and is more convenient to disassemble and assemble.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a low-pressure test box adapter device, comprising: an adapter body, a test box wall and screws, rubber strips are arranged on both sides of the middle section of the adapter body, a plurality of external joints are arranged on the top of the adapter body, a plurality of internal joints are arranged on the bottom of the adapter body, barrier rings are arranged on the upper and lower parts of the middle section of the adapter body, a sealing assembly is arranged between the two barrier rings, a mounting ring is arranged on the upper part of the adapter body, a power module and an air pressure sensor are arranged on the top of the mounting ring, a micro air pump is arranged on the top of the air pressure sensor, and the mounting ring is fixed to the wall of the test box by screws.

[0007] A further preferred solution: the sealing assembly includes a fixed plate, an airbag, a magnetic block and an air duct, wherein the fixed plate is arranged in an arc shape, the airbag is arranged on the outer wall of the fixed plate, the magnetic block is fixedly installed at both ends of the fixed plate, and the air duct is installed at the top of the fixed plate.

[0008] A further preferred solution is that the fixing plate is a hollow plate, and a ventilation pipe is provided on the outer wall of the fixing plate, and the ventilation pipe is connected to the airbag.

[0009] A further preferred solution is that the air guide tube passes through the mounting ring and the barrier ring located at the upper portion and is connected to the micro air pump.

[0010] A further preferred solution is that a terminal is provided in the external joint, a fastener is provided on the inner wall of the external joint, and the fastener is connected to the inner wall of the external joint through two sets of upper and lower elastic reset parts, wherein the upper elastic reset part is shorter than the lower elastic reset part.

[0011] A further preferred solution: the rubber strip is located between the magnetic blocks.

[0012] A further preferred solution is that the air guide tube of the induction head in the sealing assembly of the air pressure sensor enters the airbag, a control switch is provided on the top of the air pressure sensor, and the air pressure sensor is electrically connected to the micro air pump and the power module.

[0013] Beneficial effects:

[0014] 1. By providing a sealing assembly with an airbag installed, the adapter is installed into the wall of the test box. After that, the airbag will be filled with air and then expand, occupying the gap between the wall of the test box and the adapter to achieve a sealing effect. When disassembling and replacing the adapter, the micro air pump can also extract the gas in the airbag through the air guide tube to shrink the airbag, which is convenient for disassembly of the adapter;

[0015] 2. By providing multiple joints and fasteners in the joints, multiple wires can be connected at the same time when in use. When different instruments need to be tested, they can be effectively transferred, and the joints can also be loosened and slipped during the test;

[0016] 3. In summary, this type of low-pressure test chamber adapter has a sealing component with an airbag installed and a joint with fasteners inside. While having excellent sealing performance, the installation and disassembly of the adapter is also very convenient, and it can connect multiple wires at the same time. When different instruments need to be tested, the connection can be effectively performed, and it can also prevent the joints from loosening and slipping during the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2 This is a schematic diagram of the sealing component structure of the utility model.

[0019] Figure 3 It is a side sectional view of the installation of the utility model.

[0020] Figure 4 It is a cross-sectional view of the external joint of the utility model.

[0021] Figure 1-4 In: 1. Adapter body; 101. Rubber strip; 2. Barrier ring; 3. Mounting ring; 4. Sealing assembly; 401. Fixing plate; 402. Air bag; 403. Magnetic block; 404. Air guide tube; 5. External connector; 501. Terminal block; 502. Fastener; 6. Internal connector; 7. Micro air pump; 8. Air pressure sensor; 9. Power module; 10. Screws; 11. Test chamber wall. DETAILED DESCRIPTION

[0022] The following will be combined with the attached embodiment of the present utility model Figure 1-Figure 4 , clearly and completely describe the technical solutions in the embodiments of the utility model.

[0023] See also Figure 1-4In the embodiment of the utility model, a low-pressure test box adapter device includes: an adapter body 1, a test box wall 11 and screws 10, rubber strips 101 are arranged on both sides of the middle section of the adapter body 1, a plurality of external joints 5 are arranged on the top of the adapter body 1, a plurality of internal joints 6 are arranged on the bottom of the adapter body 1, barrier rings 2 are arranged on the upper and lower parts of the middle section of the adapter body 1, a sealing component 4 is arranged between the two barrier rings 2, a mounting ring 3 is arranged on the upper part of the adapter body 1, a power module 9 and an air pressure sensor 8 are arranged on the top of the mounting ring 3, a micro air pump 7 is arranged on the top of the air pressure sensor 8, and the mounting ring 3 is fixed to the test box wall 11 by screws 10; when the adapter is installed in the test box wall 11, the micro air pump is started. 7 extracts the gas in the airbag 402 in the sealing component 4, reduces the volume of the airbag 402, and makes the diameter of the airbag 402 smaller than the diameter of the barrier ring 2, so as to prevent the airbag 402 from being scratched by the test box wall 11 during the installation of the adapter. After the adapter is installed in the test box wall 11, the adapter is fixed with screws 10, and then the control switch on the air pressure sensor 8 is pressed, and the micro air pump 7 starts to pass air into the airbag 402, so that the airbag 402 expands and occupies the gap between the test box wall 11 and the adapter to achieve a sealing effect. When disassembling and replacing the adapter, the micro air pump 7 can also extract the gas in the airbag 402 through the air guide tube 404 to shrink the airbag 402, which is convenient for disassembling the adapter. .

[0024] In an embodiment of the utility model, the sealing component 4 includes a fixed plate 401, an airbag 402, a magnetic block 403 and an air duct 404, wherein the fixed plate 401 is arranged in an arc shape, the airbag 402 is arranged on the outer wall of the fixed plate 401, the magnetic block 403 is fixedly installed at both ends of the fixed plate 401, and the air duct 404 is installed on the top of the fixed plate 401. The sealing components 4 on both sides are installed on both sides of the adapter body 1 through the magnetic blocks 403. After the adapter is installed into the test box wall 11, the airbag 402 will be filled with air and then expand, occupying the gap between the test box wall 11 and the adapter to achieve a sealing effect.

[0025] In the embodiment of the utility model, the fixing plate 401 is a hollow plate, and a ventilation pipe is provided on the outer wall of the fixing plate 401, and the ventilation pipe is connected to the airbag 402;

[0026] After passing through the mounting ring 3 and the barrier ring 2 at the top, the air duct 404 is connected to the micro air pump 7. The micro air pump 7 can pass external air into the airbag 402 through the air duct 404 to expand the airbag 402. When disassembling and replacing the adapter device, the micro air pump 7 can also extract the gas in the airbag 402 through the air duct 404 to shrink the airbag 402, thereby facilitating the disassembly of the adapter device.

[0027] In the embodiment of the utility model, a terminal 501 is provided in the external connector 5, and a fastener 502 is provided on the inner wall of the external connector 5. The fastener 502 is connected to the inner wall of the external connector 5 through two sets of upper and lower elastic reset parts, wherein the upper elastic reset part is shorter than the lower elastic reset part. When the connector of the external testing device is connected to the external connector 5, the fastener 502 can play a role of clamping and tightening to prevent loosening and slipping between the connectors during the test.

[0028] In the embodiment of the utility model, the rubber strip 101 is located between the magnetic blocks 403. When the magnetic blocks 403 on both sides are attracted to each other, the rubber strip 101 will be deformed under the squeezing of the magnetic blocks 403, thereby reducing the gap between the adapter and the test box wall 11 and enhancing the sealing effect of the sealing assembly 4.

[0029] In the embodiment of the utility model, the induction head air guide tube 404 in the sealing component 4 of the air pressure sensor 8 enters the air bag 402, and a control switch is arranged at the top of the air pressure sensor 8, and the air pressure sensor 8 is electrically connected with the micro air pump 7 and the power supply module 9. After the adapter is installed into the test box wall 11, the control switch on the air pressure sensor 8 is pressed, and the micro air pump 7 starts to pass air into the air bag 402 to expand the air bag 402. At the same time, the air pressure sensor 8 continuously senses and detects the air pressure in the air bag 402. After the air pressure in the air bag 402 reaches the target value, the micro air pump 7 is controlled to be closed, so as to prevent the air bag 402 from being damaged due to excessive internal air pressure. At the same time, when the outside temperature rises and the air pressure in the air bag 402 increases, the micro air pump 7 can timely extract the excess gas in the air bag 402, and when the outside temperature drops and the air pressure in the air bag 402 decreases, the micro air pump 7 can also timely supply air to the air bag 402.

Claims

1. A low pressure test chamber adapter, include: An adapter body (1), a test box wall (11) and screws (10), characterized in that: rubber strips (101) are arranged on both sides of the middle section of the adapter body (1), a plurality of external joints (5) are arranged at the top of the adapter body (1), a plurality of internal joints (6) are arranged at the bottom of the adapter body (1), barrier rings (2) are arranged at the upper and lower parts of the middle section of the adapter body (1), a sealing component (4) is arranged between the two barrier rings (2), a mounting ring (3) is arranged at the upper part of the adapter body (1), a power module (9) and an air pressure sensor (8) are arranged at the top of the mounting ring (3), a micro air pump (7) is arranged at the top of the air pressure sensor (8), and the mounting ring (3) is fixed to the test box wall (11) by screws (10).

2. A low pressure test box adapter according to claim 1, Features: The sealing assembly (4) comprises a fixing plate (401), an air bag (402), a magnetic block (403) and an air guide tube (404), wherein the fixing plate (401) is arranged in an arc shape, the air bag (402) is arranged on the outer wall of the fixing plate (401), the magnetic block (403) is fixedly installed at both ends of the fixing plate (401), and the air guide tube (404) is installed at the top of the fixing plate (401).

3. A low pressure test box adapter according to claim 2, Features: The fixing plate (401) is a hollow plate, and a ventilation pipe is provided on the outer wall of the fixing plate (401), and the ventilation pipe is connected to the air bag (402).

4. A low pressure test box adapter according to claim 2, Features: The air guide tube (404) passes through the mounting ring (3) and the barrier ring (2) located at the upper portion, and is then connected to the micro air pump (7).

5. A low pressure test box adapter according to claim 1, Features: The external connector (5) is provided with a terminal post (501), and a fastener (502) is provided on the inner wall of the external connector (5). The fastener (502) is connected to the inner wall of the external connector (5) via two sets of upper and lower elastic reset members, wherein the upper elastic reset member is shorter than the lower elastic reset member.

6. A low pressure test box adapter according to claim 2, Features: The rubber strip (101) is located between the magnetic blocks (403).

7. A low pressure test box adapter according to claim 1, Features: The induction head air guide tube (404) in the sealing component (4) of the air pressure sensor (8) enters the air bag (402), a control switch is arranged at the top of the air pressure sensor (8), and the air pressure sensor (8) is electrically connected to the micro air pump (7) and the power module (9).

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