Adapter for calibration of low pressure test chamber

Abstract

The utility model relates to a switching device for low gas pressure test box calibration, including standard pressure gauge connector, its characterized is still including connecting assembly, the standard pressure gauge connector is tubular thread structure, and the standard pressure gauge connector includes standard pressure gauge interface end and pressure signal import end, and the pressure signal import end is internal thread, and the connecting assembly includes support pipe and conical hose, and the support pipe is the whole structure formed by external thread pipe and hollow rotator, and the external thread pipe is connected through thread cooperation with the pressure signal import end, and the conical hose includes big head and small head, and the big head is sleeved on the hollow rotator, and the small head is low gas pressure test box test port, the utility model discloses adopt conical hose as low gas pressure test box test port, can cooperate with the interface of different structure forms and different sizes of low gas pressure test box, and can effectively prevent the leakage to guarantee the calibration accuracy, the utility model discloses reasonable structure, easy operation, connection fast reliable and excellent sealing performance.

Description

Technical Field

[0001] This utility model relates to a low-pressure test chamber, specifically an adapter for calibrating a low-pressure test chamber. Background Technology

[0002] Low-pressure test chambers can simulate low-pressure conditions in high-altitude or space environments and are widely used in aerospace, electronic components, materials science and other fields.

[0003] The accuracy and stability of the internal pressure parameters of a low-pressure test chamber are crucial, directly affecting the reliability of test results; therefore, calibration is essential. According to regulations, there are two main methods: first, setting different pressure values ​​at room temperature and calibrating the pressure parameters after stabilization; second, setting different pressure parameters under different temperature conditions and calibrating them simultaneously. Currently, at room temperature, the pressure gauge is typically placed inside the low-pressure test chamber, and readings are taken through an observation window. However, when calibrating under different temperature conditions, the pressure gauge is located outside the chamber and needs to be connected to the pressure test port of the low-pressure test chamber via a threaded connection or flange connection.

[0004] The following problems exist in practice:

[0005] 1. Interface mismatch

[0006] The pressure measurement / control interfaces (such as quick couplings, flanges, threaded interfaces) of low-pressure test chambers are often not compatible with the interfaces (such as G1 / 4, G1 / 8, NPT, compression fittings, etc.) of standard calibration equipment, and cannot be directly connected.

[0007] 2. Poor sealing performance

[0008] Using general-purpose adapters or hoses for temporary connections often leads to leaks due to poor sealing in low-pressure (high-vacuum) environments, which can seriously affect calibration accuracy and even damage the vacuum level of the test chamber.

[0009] 3. Cumbersome operation

[0010] Each calibration requires finding a suitable adapter, wrapping it with Teflon tape, and laboriously tightening it, which is inefficient and the repeated disassembly and assembly can easily damage the interface;

[0011] 4. No dedicated passage

[0012] Some test chambers do not have a dedicated calibration interface, requiring calibration to be performed on the working interface, which may affect the normal control of the test chamber or require the control system to be suspended.

[0013] To address the aforementioned shortcomings of existing technologies, this utility model proposes an adapter for calibrating low-pressure test chambers that features a reasonable structure, simple operation, fast and reliable connection, excellent sealing performance, and strong adaptability. Utility Model Content

[0014] The purpose of this invention is to provide an adapter for calibrating a low-pressure test chamber that has a reasonable structure, is easy to operate, has a fast and reliable connection, excellent sealing performance, and strong adaptability.

[0015] To achieve the above objectives, the present invention adopts the following technical solution:

[0016] An adapter for calibrating a low-pressure test chamber includes a standard pressure gauge connector, characterized by further including a connecting component. The standard pressure gauge connector has a tubular threaded structure and includes a standard pressure gauge interface end and a pressure signal inlet end. The pressure signal inlet end has an internal thread. The connecting component includes a support tube and a tapered flexible tube. The support tube is an integral structure formed by an externally threaded tube and a hollow rotating body. The externally threaded tube is connected to the pressure signal inlet end via a threaded fit. The tapered flexible tube includes a large end and a small end. The large end is fitted onto the hollow rotating body, and the small end is the test port of the low-pressure test chamber.

[0017] Furthermore, the hollow rotating body is frustum-shaped.

[0018] Furthermore, the ratio of the outer diameter of the large end to the outer diameter of the small end is 2:1 to 2.5:1.

[0019] Furthermore, the standard pressure gauge interface end has an internal thread.

[0020] This utility model adopts a quick-change, universal connector design, which significantly simplifies the installation and disassembly process of calibration equipment, greatly improves work efficiency, and is especially suitable for frequent calibration or on-site calibration.

[0021] This invention uses a conical flexible tube as the test port of the low-pressure test chamber, which can be matched with different structural forms and different sizes of interfaces of the low-pressure test chamber, and can effectively prevent leakage to ensure calibration accuracy.

[0022] This utility model has a reasonable structure, is easy to operate, connects quickly and reliably, has excellent sealing performance, and is highly adaptable. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the standard pressure gauge connector of this utility model;

[0025] Figure 3This is a schematic diagram of the structure of the connecting component of this utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the conical flexible tube of this utility model.

[0027] In the diagram: 1-Standard pressure gauge connector; 1.1-Standard pressure gauge interface; 1.2-Pressure signal input end; 2-Connecting assembly; 2.1-Support tube; 2.1.1-Externally threaded tube; 2.1.2-Hollow rotating body; 2.2-Conical hose; 2.2.1-Large end; 2.2.2-Small end. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but these embodiments should not be construed as limiting the present invention.

[0029] The adapter device for calibrating a low-pressure test chamber shown in the figure includes a standard pressure gauge connector 1 and a connecting component 2. The standard pressure gauge connector 1 has a tubular threaded structure and includes a standard pressure gauge interface end 1.1 and a pressure signal inlet end 1.2. The pressure signal inlet end 1.2 has an internal thread. The connecting component 2 includes a support tube 2.1 and a tapered hose 2.2. The support tube 2.1 is an integral structure formed by an externally threaded tube 2.1.1 and a hollow rotating body 2.1.2. The externally threaded tube 2.1.1 is connected to the pressure signal inlet end 1.2 by a threaded fit. The tapered hose 2.2 includes a large end 2.2.1 and a small end 2.2.2. The large end 2.2.1 is fitted onto the hollow rotating body 2.1.2, and the small end 2.2.2 is the test port of the low-pressure test chamber.

[0030] A preferred embodiment is that, in the above scheme, the hollow rotating body 2.1.2 is frustum-shaped.

[0031] A preferred embodiment is that, in the above scheme, the ratio of the outer diameter of the large end 2.2.1 to the small end 2.2.2 is 2:1 to 2.5:1.

[0032] A preferred embodiment is that, in the above scheme, the standard pressure gauge interface end 1.1 has an internal thread.

[0033] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

Claims

1. An adapter for calibrating a low-pressure test chamber, comprising a standard pressure gauge connector (1), characterized in that: It also includes a connecting component (2). The standard pressure gauge connector (1) has a tubular thread structure. The standard pressure gauge connector (1) includes a standard pressure gauge interface end (1.1) and a pressure signal inlet end (1.2). The pressure signal inlet end (1.2) has an internal thread. The connecting component (2) includes a support tube (2.1) and a tapered hose (2.2). The support tube (2.1) is an integral structure formed by an external thread tube (2.1.1) and a hollow rotating body (2.1.2). The external thread tube (2.1.1) and the pressure signal inlet end (1.2) are connected by a threaded fit. The tapered hose (2.2) includes a large end (2.2.1) and a small end (2.2.2). The large end (2.2.1) is fitted onto the hollow rotating body (2.1.2), and the small end (2.2.2) is the test port of the low-pressure test chamber.

2. The adapter for calibrating a low-pressure test chamber according to claim 1, characterized in that: The hollow rotating body (2.1.2) is frustum-shaped.

3. The adapter for calibrating a low-pressure test chamber according to claim 1 or 2, characterized in that: The ratio of the outer diameter of the larger end (2.2.1) to the smaller end (2.2.2) is 2:1 to 2.5:

1.

4. The adapter for calibrating a low-pressure test chamber according to claim 1 or 2, characterized in that: The standard pressure gauge interface (1.1) has an internal thread.

5. The adapter for calibrating a low-pressure test chamber according to claim 1 or 2, characterized in that: The standard pressure gauge interface (1.1) has an internal thread.

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