Packaging structure of welded pressure sensor

Abstract

The utility model belongs to the technical field of packaging, and particularly relates to a packaging structure of a welding type pressure sensor, which comprises a pressure core body, a stainless steel packaging sleeve is wrapped on the outer surface of the pressure core body, a packaging structure is arranged on the outer surface of the stainless steel packaging sleeve, and the packaging structure comprises a packaging shell. And the outer surface of the upper end of the stainless steel packaging sleeve is welded with the upper surface of the packaging shell. The packaging structure of the welding type pressure sensor has the advantages of being good in sealing performance and reliability, capable of effectively avoiding the failure of the sealing performance of the pressure core sensor, prolonging the service life of the pressure core sensor, and solving the problems that the sealing performance and reliability of an existing pressure sensor are reduced or even failed due to the fact that the existing pressure sensor adopts a traditional O-shaped ring packaging mode.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging, in particular to a packaging structure of a welding pressure sensor. Background Art

[0002] Pressure products are widely used in many fields such as industrial and agricultural production, environmental monitoring and scientific research. They are mainly composed of pressure sensors, detection circuits and transmission circuits. The working principle of pressure sensors is to convert changes in pressure into changes in electrical signals. The detection circuit detects the electrical signal generated by the pressure sensor. The transmission circuit converts the pressure information of the measured medium into a standard analog signal or digital signal. When the pressure sensor is used for pressure measurement, the sensitive part of the sensor must usually be directly exposed to the various media being measured, while the detection circuit and the transmission circuit need to be isolated from the measured medium. This requires that the packaging of the pressure sensor can not only seal and isolate the detection circuit and the transmission circuit, but also truly transmit the pressure to the sensitive part of the sensor. Therefore, its packaging design and production requirements are very high.

[0003] The reliability of pressure sensors depends largely on the reliability of packaging, which makes the packaging method of pressure sensors extremely important. The fundamental purpose of pressure sensor packaging is to ensure that pressure products can achieve various functions in their use environment for a long time, comprehensively and accurately. The packaging method, including the selection of materials, structures and processes, will greatly affect the performance and reliability of pressure sensors.

[0004] At present, the packaging method using O-rings is widely used in pressure sensors, which is an extrusion type sealing method.

[0005] like Figure 1 As shown in the figure, the pressure sensor mainly consists of a packaging shell, a pressure core and an O-ring. Its working principle is to rely on the elastic deformation of the sealing O-ring under the internal pressure of the medium to form contact pressure on the sealing contact surface to achieve a sealing effect.

[0006] However, in some applications, when the measured medium is a corrosive gas or liquid, or when the medium does not match the O-ring material, it will cause the O-ring to age and fail, greatly reducing the life and reliability of the pressure sensor.

[0007] In view of this, we provide a packaging structure for a pressure sensor. Utility Model Content

[0008] The purpose of the utility model is to provide a packaging structure of a welded pressure sensor to solve the problems raised in the above background technology.

[0009] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a packaging structure of a welded pressure sensor, including a pressure core, the outer surface of the pressure core is wrapped with a stainless steel packaging sleeve, the outer surface of the stainless steel packaging sleeve is provided with a packaging structure, and the packaging structure includes a packaging shell, and the upper end outer surface of the stainless steel packaging sleeve is welded to the upper surface of the packaging shell.

[0010] Preferably, the packaging structure further comprises a positioning groove provided on the upper surface of the packaging shell, the cross section of the positioning groove is in the shape of a U-shaped U, and the outer surface of the stainless steel packaging sleeve is clamped with the inner wall of the positioning groove via a connecting piece.

[0011] Preferably, installation grooves are provided on the left and right side surfaces of the stainless steel packaging sleeve and on the inner walls on both sides corresponding to the positioning grooves, and the connecting member includes a clamping block, a pin shaft and a spring.

[0012] Preferably, the pin shaft is rotatably sleeved on the inner wall of the installation groove, and the clamping block is fixedly sleeved on the outer surface of the pin shaft located on the inner side of the installation groove.

[0013] Preferably, the spring is symmetrically fixedly mounted on the inner wall of the mounting groove, one end of the spring is fixedly connected to a side surface of the clamping block, and the outer surface of the clamping block is clamped with the inner wall of the mounting groove located in the positioning groove.

[0014] Compared with the prior art, the beneficial effects of the utility model are: the packaging structure of the welded pressure sensor has good sealing and reliability, can effectively avoid the failure of the sealing of the pressure core sensor, extend the life of the pressure core sensor, and solve the problem of reduced sealing and reliability or even failure of the sensor caused by the traditional O-ring packaging method used in the existing pressure sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the packaging structure of an existing pressure sensor;

[0016] Figure 2 A three-dimensional diagram of a stainless steel packaging sleeve structure of a packaging structure of a welded pressure sensor proposed by the utility model;

[0017] Figure 3 A three-dimensional diagram of a packaging shell structure of a packaging structure of a welded pressure sensor proposed by the utility model;

[0018] Figure 4 The utility model provides a packaging structure of a welding pressure sensor Figure 3 A magnified view of the structure in the middle.

[0019] Figure 1 Middle: 1. Pressure core; 2. O-ring; 3. Packaging jacket;

[0020] Figure 2-4 In: 1. pressure core; 2. stainless steel packaging sleeve; 3. packaging shell; 31. positioning groove; 32. mounting groove; 33. clamping block; 34. pin shaft; 35. spring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 2-Figure 4 The utility model provides a technical solution: a packaging structure of a welded pressure sensor, including a pressure core 1, the pressure core 1 including an upper substrate, a lower substrate, an isolation sintered body arranged between the upper substrate and the lower substrate for support, an upper electrode arranged below the upper substrate, and a lower electrode arranged above the lower electrode. Since the pressure core 1 belongs to the prior art, it is not drawn in the figure. The outer surface of the pressure core 1 is wrapped with a stainless steel packaging sleeve 2, and the stainless steel packaging sleeve 2 is assembled on the surface of the pressure core 1 through a standard process. The outer surface of the stainless steel packaging sleeve 2 is provided with a packaging structure, and the packaging structure includes a packaging shell 3. The upper end outer surface of the stainless steel packaging sleeve 2 is welded to the upper surface of the packaging shell 3. By setting the packaging structure, it has good sealing and reliability, can effectively avoid the failure of the sealing of the pressure core 1 sensor, extend the life of the pressure core 1 sensor, and solve the problem of reduced sealing and reliability or even failure of the existing pressure sensor using the traditional O-ring packaging method.

[0023] Furthermore, the packaging structure also includes a positioning groove 31 opened on the upper surface of the packaging shell 3, and the cross-section of the positioning groove 31 is in the shape of a U-shaped character. The outer surface of the stainless steel packaging sleeve 2 is clamped with the inner wall of the positioning groove 31 through a connecting piece. The left and right side surfaces of the stainless steel packaging sleeve 2 and the inner walls on both sides corresponding to the positioning groove 31 are provided with mounting grooves 32. The connecting piece includes a clamping block 33, a pin shaft 34 and a spring 35. The pin shaft 34 is rotatably sleeved on the inner wall of the mounting groove 32, and the clamping block 33 is fixedly sleeved on the outer surface of the pin shaft 34 located on the inner side of the mounting groove 32. The spring 35 is symmetrically fixedly installed on the inner wall of the mounting groove 32. One end of the spring 35 is fixedly connected to one side surface of the clamping block 33, and the outer surface of the clamping block 33 is clamped with the inner wall of the mounting groove 32 located in the positioning groove 31. Under the action of the spring 35, the clamping block 33 is driven to clamp with the mounting groove 32 in the positioning groove 31, so as to achieve preliminary packaging of the stainless steel packaging sleeve 2 and the packaging shell 3.

[0024] Working principle: insert the stainless steel packaging sleeve 2 wrapped with the pressure core 1 into the packaging shell 3, so that the clamping block 33 on the stainless steel packaging sleeve 2 is slidably sleeved with the inner wall of the positioning groove 31. Since the clamping block 33 is slidably sleeved with the positioning groove 31, the spring 35 is in a compressed state. After the stainless steel packaging sleeve 2 is fully inserted into the packaging shell 3, under the action of the spring 35, the clamping block 33 is driven to clamp with the installation groove 32 in the positioning groove 31, and the stainless steel packaging sleeve 2 and the packaging shell 3 are initially packaged. At this time, the pressure core 1 is finally packaged by welding the stainless steel packaging outer sleeve and the packaging shell 3.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A packaging structure of a welded pressure sensor, comprising a pressure core (1), characterized in that: The outer surface of the pressure core (1) is wrapped with a stainless steel packaging sleeve (2), the outer surface of the stainless steel packaging sleeve (2) is provided with a packaging structure, and the packaging structure includes a packaging shell (3), and the upper end outer surface of the stainless steel packaging sleeve (2) is welded to the upper surface of the packaging shell (3).

2. The packaging structure of a welded pressure sensor according to claim 1, characterized in that: The packaging structure further comprises a positioning groove (31) formed on the upper surface of the packaging shell (3); the cross section of the positioning groove (31) is in the shape of a Chinese character “Yu”; the outer surface of the stainless steel packaging sleeve (2) is clamped with the inner wall of the positioning groove (31) via a connecting piece.

3. The packaging structure of a welded pressure sensor according to claim 2, characterized in that: The left and right side surfaces of the stainless steel packaging sleeve (2) and the inner walls on both sides corresponding to the positioning groove (31) are provided with mounting grooves (32), and the connecting member comprises a clamping block (33), a pin shaft (34) and a spring (35).

4. The packaging structure of a welded pressure sensor according to claim 3, characterized in that: The pin shaft (34) is rotatably sleeved on the inner wall of the installation groove (32), and the clamping block (33) is fixedly sleeved on the outer surface of the pin shaft (34) located on the inner side of the installation groove (32).

5. The packaging structure of a welded pressure sensor according to claim 4, characterized in that: The spring (35) is symmetrically fixedly mounted on the inner wall of the mounting groove (32), one end of the spring (35) is fixedly connected to a side surface of the clamping block (33), and the outer surface of the clamping block (33) is clamped to the inner wall of the mounting groove (32) located in the positioning groove (31).

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