Pressure sensor testing device

Abstract

The invention relates to a pressure sensor testing device, and belongs to the technical field of sensor testing. The pressure sensor testing device comprises a shell and a connecting assembly, a cavity is formed in the shell, the connecting assembly comprises a first connecting piece and a second connecting piece, an annular limiting part is arranged on the outer side wall of the first connecting piece in the circumferential direction, the annular limiting part is provided with a first inclined face, and a limiting groove is formed in the second connecting piece; the groove wall of the limiting groove extends outwards to form a second inclined surface; the second connecting piece is arranged on the first surface of the shell and is communicated with the cavity; when at least part of the first connecting piece is inserted into the limiting groove, the first connecting piece communicates with the cavity through the second connecting piece, and the first inclined face abuts against the second inclined face. The first connecting piece and the second connecting piece are directly sealed through abutting of the first inclined face and the second inclined face, the problem that the connector is damaged by high-temperature and high-pressure gas is avoided, and the sealing effect of the shell is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of sensor testing, and in particular relates to a pressure sensor testing device. Background Art

[0002] Pressure sensors are widely used in various fields, such as aerospace, automobile manufacturing, petrochemical, medical equipment, etc. The accuracy and reliability of these sensors directly affect the performance and safety of the entire system. Therefore, the test equipment of pressure sensors plays a vital role in the sensor production and quality control process.

[0003] The test equipment of the pressure sensor usually includes a sealed test chamber, which is used to simulate different pressure environments to detect the performance of the sensor. The test chamber needs to be pressurized by a high-pressure delivery device. In order to ensure the sealing, the interface between the high-pressure delivery device and the test chamber is sealed by a sealing gasket.

[0004] However, the sealing gasket cannot withstand the impact of high temperature and high pressure, resulting in a decrease in the sealing effect at the interface between the high-pressure transmission equipment and the test cavity, affecting the pressure value in the test cavity and causing errors in the test of the pressure sensor. Summary of the invention

[0005] The embodiment of the present application provides a pressure sensor testing device, which is used to solve the problem in the prior art that the pressure sensor testing device has insufficient sealing, resulting in errors in the pressure sensor calibration.

[0006] The embodiment of the present application provides a pressure sensor testing device, comprising a housing and a connecting assembly, wherein a cavity is provided in the housing, and the connecting assembly comprises a first connecting member and a second connecting member, wherein an annular limiting portion is circumferentially provided on an outer wall of the first connecting member, wherein the annular limiting portion is provided with a first inclined surface, and a limiting groove is provided on the second connecting member, wherein a groove wall of the limiting groove extends outward to form a second inclined surface;

[0007] The second connecting member is disposed on the first surface of the housing and communicates with the cavity;

[0008] When at least part of the first connecting member is inserted into the limiting groove, the first connecting member is connected to the cavity through the second connecting member, and the first inclined surface abuts against the second inclined surface to seal the connection between the first connecting member and the second connecting member.

[0009] In the embodiment of the present application, the connection assembly further includes a first limiting ring and a second limiting ring arranged on the first limiting ring;

[0010] The first limiting ring is inserted into the second connecting member and is detachably connected to the second connecting member, and the second limiting ring abuts against the annular limiting portion to fix the first connecting member.

[0011] In the embodiment of the present application, an internal thread is provided on the inner side wall of the first limiting ring, and an external thread is provided on the outer side wall of the second connecting member, and the internal thread is threadably connected to the external thread;

[0012] Alternatively, a first bolt hole is provided on the first limiting ring, and a second bolt hole is provided on the second connecting member, and a bolt is connected to the second bolt hole through the first bolt hole to fix the first limiting ring to the second connecting member.

[0013] In an embodiment of the present application, a mounting hole is provided on the second surface of the shell, the bottom of the mounting hole is connected to the cavity, and the mounting hole is used to fix the pressure sensor.

[0014] In an embodiment of the present application, the mounting hole has a connecting section and a sealing section, the sealing section is connected to the cavity, the pressure sensor is connected to the connecting section, and the bottom of the pressure sensor is connected to the sealing section, so that the connection between the pressure sensor and the sealing section is sealed.

[0015] In the embodiment of the present application, the sealing section is in the shape of a truncated cone.

[0016] In the embodiment of the present application, the first limiting ring and the second limiting ring are integrally formed, and the first connecting member and the annular limiting portion are integrally formed.

[0017] In the embodiment of the present application, a buffer is provided between the contact surface of the second limiting ring and the annular limiting portion.

[0018] In the embodiment of the present application, the angle between the first inclined surface and the outer side wall of the first connecting member is 15-45 degrees.

[0019] In the embodiment of the present application, the shell is a carbon steel shell.

[0020] A pressure sensor testing device provided by an embodiment of the present application includes a housing and a connecting assembly, wherein a cavity is arranged in the housing, and the connecting assembly includes a first connecting member and a second connecting member, wherein an annular limiting portion is arranged circumferentially on the outer wall of the first connecting member, wherein the annular limiting portion is arranged with a first inclined surface, and a limiting groove is arranged on the second connecting member, wherein the groove wall of the limiting groove extends outward to form a second inclined surface; the second connecting member is arranged on the first surface of the housing and is connected to the cavity; when at least part of the first connecting member is inserted into the limiting groove, the first connecting member is connected to the cavity through the second connecting member, and the first inclined surface abuts against the second inclined surface, so that the connection between the first connecting member and the second connecting member is sealed. The first connecting member and the second connecting member are directly sealed by abutting against the first inclined surface and the second inclined surface, thereby avoiding the problem that the interface is damaged by high-temperature and high-pressure gas, and improving the sealing effect of the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the description, are used to explain the principles of the embodiments of the present application.

[0022] Figure 1 A schematic diagram of the structure of the pressure sensor testing device provided in this application;

[0023] Figure 2 A cross-sectional view of a pressure sensor testing device provided for the present application;

[0024] Figure 3 for Figure 2 A magnified view of middle;

[0025] Figure 4 for Figure 2 Enlarged view of middle B;

[0026] Figure 5 A schematic diagram of the structure of the pressure sensor testing device provided in this application before installation;

[0027] Figure 6 for Figure 4 Schematic diagram of the structure in which the first limiting ring and the second connecting member are connected by bolts.

[0028] Reference numerals:

[0029] 100-housing;

[0030] 110- cavity;

[0031] 120-Mounting hole;

[0032] 121-connecting section;

[0033] 122-sealing section;

[0034] 200-connection components;

[0035] 210-first connecting member;

[0036] 220- second connecting member;

[0037] 221-limiting slot;

[0038] 230- annular limiting portion;

[0039] 240- first inclined surface;

[0040] 250-Second bevel;

[0041] 260-first limiting ring;

[0042] 261-first bolt hole;

[0043] 262-second bolt hole;

[0044] 263-bolt;

[0045] 270-second limiting ring;

[0046] 300 - Pressure sensor.

[0047] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0049] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein.

[0050] In the embodiments of the present application, the words "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0051] In the description of the embodiments of the present application, it should be understood that the terms "inside", "outside", "top", "bottom", "front", "back", etc. indicating the orientation or position relationship (if any) are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0052] Pressure sensors are electronic components that can convert pressure signals into usable electrical signals. Pressure sensors are widely used. The demand for high-pressure sensors stems from their ability to more accurately monitor and control high-pressure environments, which is crucial to ensuring safe and reliable operation of the system.

[0053] During the development phase of high-pressure sensors, continuous testing is required to verify whether their functional parameters meet the design requirements. Therefore, special testing equipment must be made to withstand the destructive effects of high pressure and high temperature.

[0054] The existing testing method is to use the manufactured device as a carrier, and connect the high-pressure delivery device and the pressure sensor to be tested at both ends, so that the high-pressure delivery device and the pressure sensor to be tested have a sealed connection effect.

[0055] Existing pressure sensor test equipment usually includes a sealed test chamber, which is used to simulate different pressure environments to test the performance of the pressure sensor. The test chamber needs to be pressurized by a high-pressure delivery device. In order to ensure the sealing, the interface between the high-pressure delivery device and the test chamber is sealed by a sealing gasket.

[0056] However, existing sealing gaskets cannot withstand the damage caused by high temperature and high pressure, resulting in a decrease in the sealing effect, affecting the sealing of the test cavity and causing errors in the calibration of the pressure sensor.

[0057] Therefore, the present application provides a pressure sensor testing device, which is used to solve the problem that the pressure sensor testing device in the prior art is not sufficiently sealed, resulting in errors in the pressure sensor calibration. The present application will be further described below in conjunction with the accompanying drawings.

[0058] in, Figure 1 This is a schematic diagram of the structure of the pressure sensor testing device provided in this application. Figure 2 A cross-sectional view of the pressure sensor testing device provided in this application. Figure 3 for Figure 2 A is an enlarged view of the middle image. Figure 4 for Figure 2 Enlarged view of B. Figure 5 This is a schematic diagram of the structure of the pressure sensor testing device provided in this application before installation. Figure 6 for Figure 4 Schematic diagram of the structure in which the first limiting ring and the second connecting member are connected by bolts.

[0059] Combination Figure 1-5 As shown, an embodiment of the present application provides a pressure sensor testing device, including a shell 100 and a connecting assembly 200, wherein a cavity 110 is arranged in the shell 100, and the connecting assembly 200 includes a first connecting member 210 and a second connecting member 220, and an annular limiting portion 230 is circumferentially arranged on the outer wall of the first connecting member 210, and the annular limiting portion 230 is provided with a first inclined surface 240, and a limiting groove 221 is arranged inside the second connecting member 220, and the groove wall of the limiting groove 221 extends outward to form a second inclined surface 250.

[0060] The second connecting member 220 is disposed on the first surface of the housing 100 and communicates with the cavity 110 .

[0061] When at least part of the first connector 210 is inserted into the limiting groove 221 , the first connector 210 is connected to the cavity 110 through the second connector 220 , and the first inclined surface 240 abuts against the second inclined surface 250 to seal the connection between the first connector 210 and the second connector 220 .

[0062] The first connecting member 210 and the second connecting member 220 are directly sealed by abutting against the first inclined surface 240 and the second inclined surface 250 , thereby preventing the sealing portion from being damaged by high-temperature and high-pressure gas, thereby improving the sealing effect of the housing 100 .

[0063] Among them, the connecting component 200 is used to connect the cavity 110 in the shell 100 with the high-pressure delivery equipment, and the component is used to achieve the sealing of the connection between the pipeline of the high-pressure delivery equipment and the cavity 110 to avoid leakage of the high-pressure gas delivered by the high-pressure delivery equipment.

[0064] For example, the housing 100 is in a rectangular or cube shape, and is made of materials such as stainless steel, brass, aluminum alloy, and engineering plastics that have pressure resistance, corrosion resistance, sealing, and mechanical strength. Figure 2 As shown, the cavity 110 is composed of a section of a horizontal cylindrical cavity and a section of a vertical cylindrical cavity, wherein the length of the horizontal cylindrical cavity is greater than that of the vertical cylindrical cavity.

[0065] The first surface is the outer wall of the housing 100, the second connector 220 is fixedly arranged on the first surface, a limiting groove 221 is arranged inside the second connector 220, and the limiting groove 221 is connected to the cavity 110. The groove wall of the limiting groove 221 extends outward by 1-2 cm to form a second inclined surface 250. The annular limiting portion 230 is located on the outer wall of the first connector 210 and is spaced 1-2 cm from the first end of the first connector 210.

[0066] When the first connector 210 is inserted into the second connector 220, the first end of the first connector 210 is inserted into the limiting groove 221, and the first inclined surface 240 on the annular limiting portion 230 abuts against the second inclined surface 250 in the limiting groove 221, thereby achieving a sealed connection between the limiting groove 221 and the annular limiting portion 230. At this time, the second end of the first connector 210 is connected to the high-pressure delivery device, and the high-pressure delivery device delivers high-pressure gas to the cavity 110 through the limiting groove 221 through the first connector 210. Since the inclined surface seal is adopted between the limiting groove 221 and the annular limiting portion 230, the sealing surface becomes narrower. Under a certain sealing action, the sealing specific pressure of this seal is greatly increased, and it is easier to achieve sealing, ensuring the sealing between the high-pressure delivery device and the cavity 110, so that the pressure value in the cavity 110 is consistent with the pressure value delivered by the high-pressure delivery device, which facilitates the calibration of the pressure sensor 300.

[0067] It should be noted that the first connecting member 210 can also be fixed on the second connecting member 220 by the friction between the first inclined surface 240 and the second inclined surface 250. However, during the pressurization process, the friction between the first inclined surface 240 and the second inclined surface 250 may not be able to meet the excessively high pressure value, so a component for limiting the movement of the first connecting member 210 is provided below in this embodiment.

[0068] In the embodiment of the present application, the connection assembly 200 further includes a first limiting ring 260 and a second limiting ring 270 disposed on the first limiting ring 260 .

[0069] The first limiting ring 260 is inserted into the second connecting member 220 and is detachably connected to the second connecting member 220 . The second limiting ring 270 abuts against the annular limiting portion 230 to fix the first connecting member 210 .

[0070] The first limiting ring 260 and the second connecting member 220 may be threaded or bolted. The second limiting ring 270 is disposed on the side wall of the first limiting ring 260, and the inner diameter of the second limiting ring 270 is smaller than the inner diameter of the first limiting ring 260. The first limiting ring 260 is used to connect with the second connecting member 220, and the second limiting ring 270 is used to abut against the annular limiting portion 230, so as to prevent the first connecting member 210 from coming out of the second connecting member 220.

[0071] like Figure 5 As shown, exemplarily, when a threaded connection is adopted between the first limiting ring 260 and the second connecting member 220, an internal thread is provided on the inner wall of the first limiting ring 260, and an external thread is provided on the outer wall of the second connecting member 220. When the first limiting ring 260 is installed on the second connecting member 220, the internal thread is threadedly connected with the external thread.

[0072] It can be seen from the above scheme that the connection with the second connecting member 220 can be achieved by rotating the first limiting ring 260, and the number of rotations can be controlled to control the force applied by the second limiting ring 270 on the annular limiting portion 230, so that when the first connecting member 210 is inserted into the second connecting member 220, the friction between the first inclined surface 240 and the second inclined surface 250 is not too large, so as to avoid the situation where the first connecting member 210 cannot be removed from the second connecting member 220 later.

[0073] like Figure 6 As shown, exemplarily, when the first limiting ring 260 and the second connecting member 220 are connected by bolts, at least two opposite first bolt holes 261 are provided on the first limiting ring 260, and corresponding second bolt holes 262 are provided on the second connecting member 220. The first limiting ring 260 and the second connecting member 220 are fixed by bolts 263 that pass through the first bolt holes 261 and the second bolt holes 262 in sequence, so that the second limiting ring 270 abuts against the annular limiting portion 230, thereby achieving the purpose of fixing the first connecting member 210.

[0074] like Figure 4 As shown, in the embodiment of the present application, a mounting hole 120 is provided on the second surface of the housing 100 , the mounting hole 120 is communicated with the cavity 110 , and the mounting hole 120 is used to connect the pressure sensor 300 .

[0075] The second surface is the upper surface of the housing 100. In order to realize the connection between the pressure sensor 300 and the mounting hole 120, a threaded column is provided at the bottom of the pressure sensor 300, and the interior of the threaded column is hollow. When the pressure sensor 300 is installed in the mounting hole 120 through the threaded column, the cavity 110 is connected to the internal components of the pressure sensor 300 through the hollow structure of the threaded column, thereby applying pressure to the internal components of the pressure sensor 300. By comparing the data between the pressure applied to the cavity 110 by the pressurizing device and the pressure of the cavity 110 on the pressure sensor 300, it is verified whether the pressure sensor 300 meets the design requirements.

[0076] In the embodiment of the present application, the mounting hole 120 has a connecting section 121 and a sealing section 122. The sealing section 122 is connected to the cavity 110. The pressure sensor 300 is connected to the connecting section 121. The bottom of the pressure sensor 300 abuts against the sealing section 122 to seal the connection between the pressure sensor 300 and the sealing section 122.

[0077] In order to prevent the air in the cavity 110 from overflowing from the connection surface between the threaded column and the mounting hole 120, the bottom of the threaded column is set to a plane, and the plane of the threaded column abuts against the side wall of the sealing section 122, thereby achieving a sealed connection between the threaded column and the sealing section 122.

[0078] In the embodiment of the present application, the sealing section 122 is in the shape of a truncated cone. The bottom of the threaded column is also in the shape of a truncated cone, and the truncated cone structure is used to realize the inclined connection between the threaded column and the sealing section 122, so as to achieve the purpose of further sealing.

[0079] In the embodiment of the present application, the first limiting ring 260 and the second limiting ring 270 are integrally formed, and the first connecting member 210 and the annular limiting portion 230 are integrally formed, so that the connection strength between the first limiting ring 260 and the second limiting ring 270, and between the first connecting member 210 and the annular limiting portion 230 is greater, thereby avoiding the influence of the high pressure in the cavity 110.

[0080] In the embodiment of the present application, a buffer is provided between the contact surface of the second limiting ring 270 and the annular limiting portion 230 to avoid friction between the second limiting ring 270 and the annular limiting portion 230 and to increase the service life of the second limiting ring 270 and the annular limiting portion 230 .

[0081] In the embodiment of the present application, the angle between the first inclined surface 240 and the outer side wall of the first connecting member 210 is 15-45 degrees, and the corresponding angle between the second inclined surface 250 and the outer side wall of the first connecting member 210 is also 15-45 degrees.

[0082] In the embodiment of the present application, the housing 100 is a carbon steel housing. Carbon steel has excellent mechanical properties, including tensile strength, yield strength and hardness, and can maintain stable sealing performance under various working conditions. Therefore, the housing 100 made of carbon steel can meet the high pressure environment required by the present application.

[0083] Based on the above advantages, the first connecting member 210 and the second connecting member 220 may also be made of carbon steel.

[0084] A pressure sensor testing device provided in an embodiment of the present application directly performs sealing by abutting the first bevel and the second bevel on the first connecting member and the second connecting member, thereby avoiding the problem of the interface being damaged by high-temperature and high-pressure gas and improving the sealing effect of the shell.

[0085] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. The above embodiments are only used to illustrate the technical solution of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

[0086] In general, terms should be understood, at least in part, by the context in which they are used. For example, the terms "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "one" or "a plurality of" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0087] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).

Claims

1. A pressure sensor testing device, characterized in that: The invention comprises a shell (100) and a connection assembly (200), wherein a cavity (110) is arranged in the shell (100), and the connection assembly (200) comprises a first connection member (210) and a second connection member (220), wherein an outer wall of the first connection member (210) is circumferentially provided with an annular limiting portion (230), and the annular limiting portion (230) is provided with a first inclined surface (240), and a limiting groove (221) is provided on the second connection member (220), and the groove wall of the limiting groove (221) extends outward to form a second inclined surface (250); The second connecting member (220) is arranged on the first surface of the housing (100), and the limiting groove (221) is in communication with the cavity (110); When at least a portion of the first connecting member (210) is inserted into the limiting groove (221), the first connecting member (210) is connected to the cavity (110) through the second connecting member (220), and the first inclined surface (240) abuts against the second inclined surface (250) to seal the connection between the first connecting member (210) and the second connecting member (220).

2. The pressure sensor testing device according to claim 1, characterized in that: The connection assembly (200) further comprises a first limiting ring (260) and a second limiting ring (270) arranged on the first limiting ring (260); The first limiting ring (260) is inserted into the second connecting member (220) and is detachably connected to the second connecting member (220), and the second limiting ring (270) abuts against the annular limiting portion (230) to fix the first connecting member (210).

3. The pressure sensor testing device according to claim 2, characterized in that: An internal thread is provided on the inner side wall of the first limiting ring (260), and an external thread is provided on the outer side wall of the second connecting member (220), and the internal thread is threadably connected to the external thread; Alternatively, a first bolt hole (261) is provided on the first limiting ring (260), and a second bolt hole (262) is provided on the second connecting member (220), and a bolt (263) is connected to the second bolt hole (262) through the first bolt hole (261) to fix the first limiting ring (260) to the second connecting member (220).

4. The pressure sensor testing device according to claim 3, characterized in that: A mounting hole (120) is provided on the second surface of the housing (100), the mounting hole (120) being in communication with the cavity (110), and the mounting hole (120) is used to connect a pressure sensor.

5. The pressure sensor testing device according to claim 4, characterized in that: The mounting hole (120) comprises a connecting section (121) and a sealing section (122); the sealing section (122) is in communication with the cavity (110); the pressure sensor (300) is connected to the connecting section (121); the bottom of the pressure sensor (300) abuts against the sealing section (122) so that the connection between the pressure sensor (300) and the sealing section (122) is sealed.

6. The pressure sensor testing device according to claim 5, characterized in that: The sealing section (122) is in the shape of a truncated cone.

7. The pressure sensor testing device according to any one of claims 2 to 6, characterized in that: The first limiting ring (260) and the second limiting ring (270) are integrally formed, and the first connecting member (210) and the annular limiting portion (230) are integrally formed.

8. The pressure sensor testing device according to any one of claims 2 to 6, characterized in that: A buffer is provided between the contact surface between the second limiting ring (270) and the annular limiting portion (230).

9. The pressure sensor testing device according to any one of claims 1 to 6, characterized in that: The included angle between the first inclined surface (240) and the outer side wall of the first connecting member (210) is 15-45 degrees.

10. The pressure sensor testing device according to any one of claims 1 to 6, characterized in that: The housing (100) is a carbon steel shell.

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