Rapid test tool suitable for low-temperature circulator

Abstract

The utility model discloses a rapid test tool suitable for a low temperature circulator, comprising a Dewar, a test groove is arranged in the Dewar, a backing plate is arranged in the test groove, SMA radio frequency coaxial connectors 1 are arranged in the test groove and at two sides of the backing plate, an end portion of the Dewar is fixed through a cover plate, and the Dewar is provided with a plurality of first SMA radio frequency coaxial connectors 2 and a plurality of second SMA radio frequency coaxial connectors 3. The cover plate is provided with an SMA radio frequency coaxial connector II which is connected with the SMA radio frequency coaxial connector I; the cover plate is connected with a transition flange through a pipe fitting, and the transition flange is connected with a vacuum device. The test tool with the internal vacuum test environment has a firm structure and good heat insulation capability, so that a simple Dewar structure can be firmly supported in the vacuum environment, the internal test environment of the Dewar is ensured through the cooperation of the SMA radio frequency coaxial connector I and the SMA radio frequency coaxial connector II, and the test efficiency of the Dewar is improved. And the quick clamping test of the to-be-tested piece is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to microwave device technical field, concretely relates to a kind of quick test tool suitable for cryogenic circulator. BACKGROUND

[0002] The working temperature zone of cryogenic circulator is about 4K-77K, mainly applied in superconducting quantum computing, deep space radio astronomy detection, radar and other systems, with the effect of improving standing wave between devices, preventing signal crosstalk, is the key device of the whole system.

[0003] The test environment of current cryogenic circulator is mainly to place the device in the low-temperature dewar test platform for testing, so that its temperature reaches the required test temperature, but the cryogenic circulator needs repeated and multiple tests during development, and this test method has the disadvantages of long cooling time, long rewarming time and long cycle test period, and cannot quickly verify its basic index performance, therefore, a test tool suitable for cryogenic circulator and capable of quick installation and improving efficiency is urgently needed. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is to provide a test tool capable of quick installation and improving efficiency.

[0005] To solve the above technical problems, the utility model provides the following technical scheme:

[0006] A quick test tool suitable for cryogenic circulator, comprising a dewar, a test groove is formed in the inside of the dewar, a backing plate is installed in the test groove, an SMA radio frequency coaxial connector one is arranged inside the test groove and at both sides of the backing plate, the end of the dewar is fixed by a cover plate, the cover plate is installed with an SMA radio frequency coaxial connector two connected with the SMA radio frequency coaxial connector one.

[0007] The cover plate is connected with a transition flange by a pipe fitting, and the transition flange is connected with a vacuum device.

[0008] The test tool with internal vacuum test environment provided by the application has a solid structure and good heat insulation capacity, so that the simple dewar structure can be firmly supported in vacuum environment, the cooperation of the SMA radio frequency coaxial connector one and the SMA radio frequency coaxial connector two ensures the test environment inside the dewar, and quick clamping test of the measured piece is realized.

[0009] As a further scheme of the utility model, the transition flange is provided with three interfaces, one of which is connected with a pipe fitting, one is connected with a manual valve, and the other is connected with a vacuum device.

[0010] As a further scheme of the utility model, the pipe fitting and the transition flange are fixed by a clamp.

[0011] As a further scheme of the utility model: the gasket adopts oxygen-free copper material.

[0012] As a further scheme of the utility model: the Dewar is in frame type structure, which adopts aluminum metal material.

[0013] As a further scheme of the utility model: the cover plate is provided with sealing ring one at the connecting position with the Dewar.

[0014] As a further scheme of the utility model: the SMA radio frequency coaxial connector two is provided with sealing ring two at the connecting position with the cover plate.

[0015] As a further scheme of the utility model: the pipe fitting is provided with sealing ring three at the connecting position with the cover plate.

[0016] As a further scheme of the utility model: the SMA radio frequency coaxial connector one adopts elbow SMA radio frequency coaxial connector.

[0017] As a further scheme of the utility model: the SMA radio frequency coaxial connector two adopts double female head SMA radio frequency coaxial connector.

[0018] Compared with the prior art, the utility model has the beneficial effects that:

[0019] Firstly, the application provides a test tool of internal vacuum test environment, which has firm structure and good heat insulation capacity, so that the simple Dewar structure can be firmly supported in the vacuum environment, the cooperation of the SMA radio frequency coaxial connector one and the SMA radio frequency coaxial connector two guarantees the internal test environment of the Dewar, and the quick clamping test of the tested piece is realized, the test end of the test tool is soaked in liquid helium, the quick cooling and impact resistance can be achieved, and the cycle test period is shortened.

[0020] Secondly, the Dewar is in frame type aluminum metal structure, the gasket adopts oxygen-free copper, has good heat conductivity, can better transmit temperature to the tested piece, is light in weight, and the thin wall structure at the inner side avoids too much heat from being conducted to the upper side of the cover plate, so that the use of the component is affected; the sealing rings are arranged at multiple connecting positions, so that the airtight environment in the Dewar is guaranteed, and the test environment of the tested piece is guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structure schematic view of a quick test tool suitable for low-temperature circulator of the utility model embodiment;

[0022] EXPLANATION OF REFERENCE NUMERALS:

[0023] 1, dewar; 2, backing plate; 3, to be measured piece; 4, SMA radio frequency coaxial connector one; 5, cover plate; 6, sealing ring one; 7, SMA radio frequency coaxial connector two; 8, sealing ring two; 9, sealing ring three; 10, pipe; 11, clamp; 12, transition flange; 13, hand valve. DETAILED DESCRIPTION

[0024] To make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below, obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] Referring to Figure 1 A kind of quick test tool suitable for cryogenic circulator, including dewar 1, backing plate 2, to be measured piece 3, SMA radio frequency coaxial connector one 4, cover plate 5, sealing ring one 6, SMA radio frequency coaxial connector two 7, sealing ring two 8, sealing ring three 9, pipe 10, clamp 11, transition flange 12 and hand valve 13.

[0026] Referring to Figure 1 Dewar 1 is in the form of frame structure as a whole, which is made of aluminum material, has good thermal conductivity, is light in weight, and has thin-walled structure on the inner side of dewar 1, so that excessive heat can be avoided from being conducted to the cover plate 5 of dewar 1. A test groove is formed in the interior of dewar 1, and the cover plate 5 is installed on dewar 1 to seal the test groove, and a sealing ring one 6 is arranged at the connecting position of the cover plate 5 and the test groove for sealing.

[0027] Referring to Figure 1 The backing plate 2 is installed on the inner wall of dewar 1, and is made of oxygen-free copper material, which is easy to process and has good thermal conductivity, so that the temperature can be better transmitted to the to-be-measured piece 3.

[0028] Referring to Figure 1 The to-be-measured piece 3 is fixed on dewar 1 by means of the backing plate 2 and countersunk head screws.

[0029] Referring to Figure 1 Two groups of SMA radio frequency coaxial connectors one 4 are arranged on both sides of the backing plate 2, and the SMA radio frequency coaxial connectors one 4 are selected to be elbow SMA radio frequency coaxial connectors. The input and output interfaces of the to-be-measured piece 3 are connected to the elbow SMA radio frequency coaxial connectors, which are connected to soft cables. The soft cables are connected to the SMA radio frequency coaxial connector two 7, which is installed on the cover plate 5 and is selected to be a double female head SMA radio frequency coaxial connector.

[0030] Further, a sealing ring two 8 is arranged at the connection between the SMA radio frequency coaxial connector two 7 and the cover plate 5.

[0031] With reference to Figure 1 The pipe fitting 10 is connected to the cover plate 5, the pipe fitting 10 is a stainless steel welded pipe fitting, and the end face is processed after welding to ensure the connection plane precision, one end of the pipe fitting 10 is provided with a sealing ring three 9 and is fastened to the cover plate 5 by means of a screw, and the other end is connected to the transition flange 12 by means of a clamp 11, and a sealing ring is arranged in the middle of the connection between the two, the pipe fitting 10 is in communication with the inside of the Dewar 1 and is used for preparing for vacuumizing later.

[0032] With reference to Figure 1 The transition flange 12 is provided with three connection surfaces, that is, three connection openings, the end face is connected from a small inner diameter to a large inner diameter, the small inner diameter is connected to the pipe fitting 10, the large inner diameter is connected to the manual valve 13, and the side face is connected to the vacuum device, and a sealing ring is arranged at each connection position; after the vacuum device is vacuumized from the side face of the transition flange 12, the manual valve 13 is tightened, so that the Dewar 1 is vacuumized.

[0033] The specific operation principle of the present application is as follows:

[0034] During installation, the measured piece 3 is fixed on the Dewar 1 by means of the backing plate 2 and the countersunk screw, the input and output interfaces of the measured piece 3 are connected by means of the SMA radio frequency coaxial connector one 4, the SMA radio frequency coaxial connector one 4 is connected with a flexible cable, and the flexible cable is connected with the SMA radio frequency coaxial connector two 7; the pipe fitting 10 is a steel pipe welding piece, the end face is processed after welding to ensure the connection plane precision, one end is provided with a sealing ring 9 and is fastened to the cover plate 5 by means of a screw, and the other end is connected to the transition flange 12 by means of a clamp 11; the three connection surfaces of the transition flange 12 are connected to the pipe fitting 10 through a small inner diameter, connected to the manual valve 13 through a large inner diameter, and connected to the vacuum device through a side face, and are all provided with sealing rings.

[0035] During use, after the inner wall of the Dewar 1 is vacuumized from the side face of the transition flange 12 by means of the vacuum device, the manual valve 13 is tightened, and then the Dewar 1 is placed into liquid helium, so that the measured piece 3 can be tested, and the rapid cooling and impact resistance are achieved.

[0036] The above examples are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing examples, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing examples can be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A rapid testing fixture suitable for cryogenic circulators, characterized in that, The device includes a Dewar (1), which has a test slot inside. A pad (2) is installed inside the test slot. An SMA RF coaxial connector (4) is provided inside the test slot and on both sides of the pad (2). The end of the Dewar (1) is fixed by a cover plate (5). An SMA RF coaxial connector (7) connected to the SMA RF coaxial connector (4) is installed on the cover plate (5). The cover plate (5) is connected to the transition flange (12) via the pipe fitting (10), and the transition flange (12) is connected to the vacuum device.

2. The rapid testing fixture for cryogenic circulators according to claim 1, characterized in that: The transition flange (12) has three interfaces, one of which is connected to the pipe fitting (10), one of which is connected to the manual valve (13), and the other of which is connected to the vacuum device.

3. A rapid testing fixture for cryogenic circulators according to claim 2, characterized in that: The pipe fitting (10) is fixed to the transition flange (12) by a clamp (11).

4. A rapid testing fixture for cryogenic circulators according to claim 1, characterized in that: The pad (2) is made of oxygen-free copper.

5. A rapid testing fixture for cryogenic circulators according to claim 1, characterized in that: The Dewar (1) has a frame-like structure and is made of aluminum.

6. A rapid testing fixture for cryogenic circulators according to claim 1, characterized in that: A sealing ring (6) is provided at the connection position between the cover plate (5) and the Dewar (1).

7. A rapid testing fixture for cryogenic circulators according to claim 1, characterized in that: A sealing ring 2 (8) is provided at the connection position between the SMA radio frequency coaxial connector 2 (7) and the cover plate (5).

8. A rapid testing fixture for cryogenic circulators according to claim 1, characterized in that: A sealing ring 3 (9) is provided at the connection position between the pipe fitting (10) and the cover plate (5).

9. A rapid testing fixture for cryogenic circulators according to claim 1, characterized in that: The SMA RF coaxial connector (4) is a bent SMA RF coaxial connector.

10. A rapid testing fixture for cryogenic circulators according to claim 1, characterized in that: The SMA RF coaxial connector 2 (7) adopts a double female SMA RF coaxial connector.

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