Sensing device
By using a threaded connection and sealing design between the sensor element and the base, the problem of difficult sensor element fixing and sealing is solved, realizing a high-efficiency and low-cost sensing device suitable for multi-purpose scenarios such as medium and high pressure and temperature measurement.
Patent Information
- Application Number
- CN202520172401.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-01-24
AI Technical Summary
The sealing of sensor elements in existing sensing devices is difficult, especially in high-pressure scenarios where the sealing effect is poor. Furthermore, the high cost of laser welding technology makes it difficult to meet the growing demand for combined pressure and temperature measurement.
By using a threaded connection between the sensor element and the base, a seal is achieved during the tightening process using the first and second sealing parts, which simplifies the structural design and reduces the manufacturing cost.
It achieves a reliable sealed connection between the sensor element and the base, improves assembly efficiency, reduces process costs, and adapts to various working conditions such as medium and high pressure, high temperature or low temperature, thus expanding its application range.
Smart Images
Figure CN223856621U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to sensing technique field, especially, a kind of sensing device is related. BACKGROUND
[0002] For medium-high pressure sensor, the fixed sealing of sensing element in the whole sensor is always difficult.According to the base material of sensing element, the sensing element of pressure sensor currently has ceramic, micro-electro-mechanical system (Micro-Electro-Mechanical System) silicon cup, metal base three kinds.Among them, ceramic sensing element generally adopts the way of pre-tightening compression sealing ring to fix and seal, this sealing method has larger leakage at low temperature, not suitable for high pressure scene with air pressure greater than 50Bar, and the product sealing design is more complex in the scene needing to integrate thermistor to measure temperature.Micro-electro-mechanical system silicon cup sensing element generally adopts brazing process to be fixed and sealed with pressure pipeline, although it is convenient to integrate thermistor to measure temperature, but it also cannot be applied to high pressure scene with air pressure greater than 50Bar.The bottom of metal base sensing element is generally connected and sealed with pressure pipeline by laser welding, and the top plane is a Wheatstone bridge made by special process, which is widely used in medium-high pressure scene with higher reliability requirement, but because the cost of laser welding process is higher, and has certain requirements for structural design, so the metal base sensing element is less used in medium pressure scene;In addition, for the growing demand of pressure and temperature two-in-one measurement, it needs to integrate thermistor, and the sensing element using laser welding needs complex seat structure design and higher process cost, which is not conducive to wide use. SUMMARY
[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide a sensing device for solving the problem of difficult fixation and sealing of sensing element in the prior art sensing device, to reduce the process cost of sensing device.
[0004] To achieve the above object and other related objects, the utility model provides a sensing device, which comprises:
[0005] A seat body is provided with a mounting channel and a first medium channel, and a first sealing part is arranged in the mounting channel.
[0006] A sensing element has a second medium channel and a second sealing part, the sensing element is screwed into the mounting channel and connected with the seat body, the second medium channel is communicated with the first medium channel, and the second sealing part is in contact with the first sealing part to seal the first medium channel and the second medium channel when the sensing element is connected and screwed with the seat body.
[0007] Optionally, the mounting channel comprises a connecting section, an inner side wall of the connecting section is provided with an internal thread, the sensing element has a first end extending into the mounting channel, and an outer side wall of the first end is provided with an external thread matched with the internal thread.
[0008] Optionally, the first medium channel is in communication with the mounting channel, and the second medium channel is arranged inside the sensing element and in communication with the first medium channel through an end wall of the first end.
[0009] Optionally, the mounting channel further comprises a sealing section, the sealing section is located between the connecting section and the first medium channel, and an inner side wall of the sealing section forms the first sealing part.
[0010] Optionally, the first sealing part and the second sealing part are in contact to form a face contact sealing.
[0011] Optionally, the first sealing part comprises a first taper surface, the second sealing part comprises a second taper surface matched with the first taper surface, and the second taper surface is in contact with the first taper surface to form the face contact sealing.
[0012] Optionally, the first sealing part and the second sealing part are in contact to form a line contact sealing.
[0013] Optionally, the first sealing part comprises a third taper surface, the second sealing part comprises a horizontal end surface of the first end of the sensing element, and an edge of the horizontal end surface is in contact with the third taper surface to form the line contact sealing.
[0014] Optionally, the seat body comprises a metal seat body, and the sensing element comprises a metal sensing element.
[0015] Optionally, the sensing device further comprises a circuit board assembly and a plug-in connector, the circuit board assembly is mounted on the seat body and electrically connected with the sensing element, and the plug-in connector is mounted on the seat body and electrically connected with the circuit board assembly.
[0016] Optionally, the sensing element is a pressure measuring unit, and the sensing device further comprises a temperature measuring unit, the temperature measuring unit is mounted on the seat body and electrically connected with the circuit board assembly.
[0017] As described above, the sensing device has at least the following beneficial effects: the sensing element is directly fixed by screwing with the seat body, and the first medium channel and the second medium channel are sealed and communicated by cooperating the first sealing part and the second sealing part during the screwing process, so that the connection and sealing are realized at the same time, the operation is convenient, the assembly efficiency is improved, and the structure is simplified and the cost is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 Structure diagram of the sensing device embodiment one of the present application;
[0019] Figure 2 For Figure 1 Partial sectional view of the sensing element and the seat body before assembly in the sensing device embodiment one of the present application;
[0020] Figure 3 For Figure 1 Partial sectional view of the sensing element and the seat body after assembly in the sensing device embodiment one of the present application;
[0021] Figure 4 Partial sectional view of the sensing element and the seat body before assembly in the sensing device embodiment two of the present application;
[0022] Figure 5 Partial sectional view of the sensing element and the seat body after assembly in the sensing device embodiment two of the present application;
[0023] Figure 6 Partial sectional view of the sensing device embodiment three of the present application.
[0024] Part number explanation
[0025] Seat body 1, first taper surface 11, first medium passage 12, internal thread 13, installation passage 14, third taper surface 15, sensing element 2, second sealing part 21, external thread 22, second medium passage 23, circuit board assembly 3, plug-in part 4, temperature measuring unit 5. DETAILED DESCRIPTION
[0026] The implementation manners of the present application are explained by specific embodiments below, and other advantages and effects of the present application can be easily understood by those skilled in the art from the content disclosed in the specification.
[0027] It should be understood that the structures, proportions, sizes, etc. shown in the drawings attached to the specification are only used to cooperate with the content disclosed in the specification for understanding and reading by those skilled in the art, and do not define the limiting conditions for the implementation of the present application, so they do not have technical substantive significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects and purposes that can be produced by the present application, should still fall within the scope of the technical content disclosed by the present application. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" in the specification are only for the convenience of clear understanding and reading, and are not used to limit the scope of the implementation of the present application. The change or adjustment of the relative relationship, without substantially changing the technical content, is also considered as the scope of the implementation of the present application.
[0028] Reference Figure 1 , Figure 2 ,Figure 4 and Figure 6 In some optional embodiments, the application provides a sensing device, which comprises a seat body 1 and a sensing element 2; in addition to the above-mentioned components, the sensing device can further comprise a circuit board assembly 3 and / or a plug-in connector 4 and / or a temperature measuring unit 5. Wherein, the seat body 1 is provided with a mounting channel 14 and a first medium channel 12, and the mounting channel 14 is provided with a first sealing portion; the sensing element 2 has a second medium channel 23 and a second sealing portion 21, the sensing element 2 is screwed into the mounting channel 14 and is threadedly connected with the seat body 1, the second medium channel 23 is communicated with the first medium channel 12, and the second sealing portion 21 is in contact with the first sealing portion to seal the first medium channel 12 and the second medium channel 23 when the sensing element 2 is screwed with the seat body 1. The sensing element 2 is threadedly connected with the seat body 1 and is in contact with the first sealing portion and the second sealing portion 21 to seal, so that the gas medium, liquid medium or other pressure medium enters the second medium channel 23 from the first medium channel 12, and the corresponding pressure is detected by the sensing element 2, avoiding the leakage of the pressure medium from the assembly gap between the sensing element 2 and the seat body 1 to affect the detection accuracy.
[0029] Optionally, the seat body 1 comprises a metal seat body, that is, the seat body 1 can be made of metal material.
[0030] Optionally, the sensing element 2 comprises a metal sensing element, that is, the sensing element 2 can be made of metal material, for example, a metal base sensing element.
[0031] Optionally, the circuit board assembly 3 is installed on the seat body 1 and is electrically connected with the sensing element 2, the plug-in connector 4 is installed on the seat body 1 and is electrically connected with the circuit board assembly 3, the information detected by the sensing element 2 is transmitted to the circuit board assembly 3, and is outputted to the outside by the plug-in connector 4.
[0032] Optionally, the mounting channel 14 comprises a connecting section, an inner thread 13 is arranged on the inner side wall of the connecting section, the sensing element 2 has a first end which extends into the mounting channel 14, and an outer thread 22 matched with the inner thread 13 is arranged on the outer side wall of the first end. The first end of the sensing element 2 is threadedly connected with the connecting section, the connection is firm and the operation is simple and convenient, especially compared with the connection by welding, the process is simplified and the process cost is reduced. Further, the sensing element 2 has a second end which is located outside the mounting channel 14, and a mounting matching portion is arranged on the outer side wall of the second end. Specifically, the cross section of the mounting matching portion can be a regular hexagon, so as to be matched with the mounting matching portion by a hexagonal sleeve to rotate and tighten or loosen the sensing element 2.
[0033] Optionally, the first medium channel 12 is in communication with the mounting channel 14, and the second medium channel 23 is arranged inside the sensing element 2, one end of the second medium channel 23 penetrates the end wall of the first end and is in communication with the first medium channel 12. The structure is designed so that when the sensing element 2 is connected to the seat body 1 by extending into the mounting channel 14, the second medium channel 23 is connected in alignment with the first medium channel 12, which is simple and convenient to install. Further, the mounting channel 14 further comprises a sealing section, which is located between the connecting section and the first medium channel 12, and the inner side wall of the sealing section forms a first sealing part. The sealing section is located at the outer periphery of the connection between the first medium channel 12 and the second medium channel 23, which is beneficial to avoid the leakage of pressure medium in the first medium channel 12 and the second medium channel 23.
[0034] The sensing device of the above embodiment, the sensing element 2 is connected to the seat body 1 by a threaded connection, and is sealed by contact between the first sealing part and the second sealing part 21 during connection. The sealing and connecting operation is simple and convenient, especially without the need for laser welding process, which is beneficial to reduce the process cost. In addition, the sensing element 2 does not need to be welded and fixed, which reduces the installation difficulty of the sensing element 2, thereby reducing the requirement for the installation position of the sensing element 2 on the seat body 1, which is beneficial to arrange the sensing element 2 eccentrically on the seat body 1 according to the demand, and the arrangement is more flexible, which is further beneficial to improve the range of applicable scenarios.
[0035] Referring to Figure 2 and Figure 3 In some optional embodiments, the first sealing part and the second sealing part 21 form a face contact sealing by contact.
[0036] Optionally, the first sealing part comprises a first taper surface 11, and the second sealing part 21 comprises a second taper surface matched with the first taper surface 11, and the second taper surface contacts the first taper surface 11 to form a face contact sealing. That is, the first taper surface 11 and the second taper surface can be matched to form a face contact with the same taper, which has a large contact area and is beneficial to improve the sealing performance and can adapt to medium-high pressure, high temperature or low temperature working conditions.
[0037] Referring to Figure 4 and Figure 5 In some optional embodiments, the first sealing part and the second sealing part 21 form a line contact sealing by contact.
[0038] Optionally, the first sealing part comprises a third taper surface 15, and the second sealing part 21 comprises a horizontal end surface of the first end of the sensing element 2, and the edge of the horizontal end surface contacts the third taper surface 15 to form a line contact sealing. That is, the outer contour of the horizontal end surface is matched with the third taper surface 15 to form a line contact, which has a simple structure, low processing difficulty and low cost, and can adapt to medium-high pressure, high temperature or low temperature working conditions.
[0039] The sensor device of the above embodiment, the first sealing part cooperates with the second sealing part 21 to form different forms of sealing, which can meet the requirements of different working conditions and has wide application range.
[0040] Referring to Figure 6 In some optional embodiments, the sensor element 2 comprises a pressure measuring unit, the temperature measuring unit 5 is installed on the seat body 1, and the temperature measuring unit 5 is electrically connected with the circuit board assembly 3; wherein the axial center line of the pressure measuring unit is offset from the axial center line of the seat body 1, or in other words, the pressure measuring unit is eccentrically installed on the seat body 1, which facilitates the installation of the temperature measuring unit 5 and is conducive to realizing the compatibility of pressure measurement and temperature measurement, and the application range is more flexible and extensive, thereby reducing the structural design complexity of the multi-in-one sensor device for pressure, temperature and the like, and thus being conducive to reducing the cost.
[0041] The sensor device of the utility model, sensor element 2 and seat body 1 are connected and fixed through the threaded connection mode, and the connection operation is simple, convenient and fast, and the sensor element 2 and the seat body 1 are sealed through the cooperation of the first sealing part and the second sealing part 21 at the same time of connection, which is simple in structure and reliable in sealing, reduces the process difficulty and cost, and has wide application range.
[0042] In the description of the present specification, the description of the terms "the present embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0043] The above embodiments only exemplarily illustrate the principle and effect of the utility model, and are not used to limit the utility model. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the utility model. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the utility model should be covered by the claims of the utility model.
Claims
1. A sensing device, characterized by The application relates to a sensor device. The seat body is provided with a mounting channel and a first medium channel, and the mounting channel is provided with a first sealing part. The sensor element has a second medium channel and a second sealing part, the sensor element extends into the mounting channel and is threadedly connected with the seat body, the second medium channel communicates with the first medium channel, and the second sealing part contacts and seals the first medium channel and the second medium channel when the sensor element is connected and screwed with the seat body.
2. The sensing device of claim 1, wherein, The mounting channel comprises a connecting section, the inner side wall of the connecting section is provided with an internal thread, the sensor element has a first end extending into the mounting channel, and the outer side wall of the first end is provided with an external thread matched with the internal thread.
3. The sensing device of claim 2, wherein, The first medium channel communicates with the mounting channel, the second medium channel is arranged inside the sensor element, and one end of the second medium channel penetrates through the end wall of the first end and communicates with the first medium channel.
4. The sensing device of claim 2, wherein, The mounting channel further comprises a sealing section, the sealing section is located between the connecting section and the first medium channel, and the inner side wall of the sealing section forms the first sealing part.
5. The sensing device according to any one of claims 1 to 4, characterized in that The first sealing part and the second sealing part contact and form face contact sealing.
6. The sensing device of claim 5, wherein, The first sealing part comprises a first taper surface, the second sealing part comprises a second taper surface matched with the first taper surface, and the second taper surface contacts the first taper surface to form the face contact sealing.
7. The sensing device according to any one of claims 1 to 4, characterized in that The first sealing part and the second sealing part contact and form line contact sealing.
8. The sensing device of claim 7, wherein, The first sealing part comprises a third taper surface, the second sealing part comprises a horizontal end surface of the first end of the sensor element, and the edge of the horizontal end surface contacts the third taper surface to form the line contact sealing.
9. The sensing device of claim 1, wherein, The seat body comprises a metal seat body, and the sensor element comprises a metal sensor element.
10. The sensing device of claim 1 or 9, wherein, The sensor device further comprises a circuit board assembly and a plug-in connector, the circuit board assembly is mounted on the seat body and electrically connected with the sensor element, and the plug-in connector is mounted on the seat body and electrically connected with the circuit board assembly.
11. The sensing device of claim 10, wherein, The sensor element is a pressure measuring unit, the sensor device further comprises a temperature measuring unit, the temperature measuring unit is mounted on the seat body and electrically connected with the circuit board assembly.