Temperature and pressure sensor

Abstract

The utility model belongs to the technical field of sensors, and discloses a temperature and pressure sensor, which comprises a shell, a first mounting cavity is arranged at the upper end of the shell, a first internal thread is arranged on the inner wall of the first mounting cavity, and a pressure leading port is arranged at the lower end of the shell; a through hole is formed in the center of the connecting piece, a second mounting cavity is formed in the position, close to the through hole, of the connecting piece, a first external thread is arranged on the outer wall of the connecting piece, and the connecting piece is connected with the shell through cooperation of the first external thread and the first internal thread; the pressure detection module is connected with the connecting piece through the through hole; and the temperature detection module is arranged in the second mounting cavity. According to the temperature and pressure composite sensor, the pressure detection module and the temperature detection module are arranged at the same time, temperature and pressure are measured at the same time, the integration level is high, the structure of the temperature and pressure composite sensor is simplified, the connecting piece is connected with the shell in a threaded fit mode, and the overall sealing performance is better.

Description

Technical Field

[0001] The utility model belongs to the technical field of sensors and relates to a temperature and pressure sensor. Background Art

[0002] Pressure sensors have excellent performance and are widely used in various industrial dynamic environments, aerospace technology, large hydraulic equipment and other areas. With the improvement of system performance requirements, higher requirements are placed on the pressure range of pressure sensors; in addition, existing sensors do not have the function of measuring temperature and pressure at the same time, or have measurement functions, but their process is difficult, production efficiency is low, and product costs are high. With the increasing degree of system integration, there is an increasing demand for using a single sensor to measure temperature and pressure at the same time; therefore, it is necessary to combine temperature sensors with pressure sensors to ensure measurement accuracy and accuracy of measurement results while further improving their high pressure resistance.

[0003] When a traditional pressure sensor is connected to a measuring pipe and the sealing performance of the pressure sensor is poor, excessive pressure will be quickly transmitted to the pressure sensor, causing a significant impact on the sensor's sensitive elements, greatly reducing the sensor's measurement accuracy and stability.

[0004] Based on this, the art urgently needs a temperature and pressure sensor to solve the above technical problems. Utility Model Content

[0005] In view of this, the purpose of the utility model is to solve the above problems and provide a temperature and pressure sensor that can measure temperature and pressure simultaneously and has good sealing performance.

[0006] In order to solve the above technical problems, the utility model provides a temperature and pressure sensor, comprising:

[0007] A housing, wherein a first installation cavity is disposed at the upper end of the housing, a first internal thread is disposed on the inner wall of the first installation cavity, and a pressure inlet is disposed at the lower end of the housing;

[0008] A connecting piece, wherein a through hole is provided at the center of the connecting piece, a second mounting cavity is provided near the through hole, a first external thread is provided on the outer wall of the connecting piece, and the connecting piece is connected to the housing through the first external thread and the first internal thread;

[0009] A pressure detection module, wherein the pressure detection module is connected to the connecting member through the through hole;

[0010] A temperature detection module is disposed in the second installation cavity.

[0011] As a further improvement of the present invention, the first installation cavity and the second installation cavity are both cylindrical cavities, the inner diameter of the first installation cavity is larger than the inner diameter of the second installation cavity, and the through hole is a cylindrical through hole.

[0012] As a further improvement of the present invention, a damper is also accommodated in the first installation cavity, the outer wall of the damper is provided with a second external thread, the inner wall of the first installation cavity is provided with a second internal thread, and the damper is connected to the shell through the second external thread and the second internal thread.

[0013] As a further improvement of the present invention, the damper is connected to the pressure detection module in the first installation cavity.

[0014] As a further improvement of the utility model, the damper is connected to the pressure inlet through a third cavity.

[0015] As a further improvement of the present invention, the pressure detection module is connected to the through hole by welding.

[0016] As a further improvement of the present invention, the first external thread of the connecting member and the first internal thread of the shell are connected in a matching connection area by welding.

[0017] As a further improvement of the present invention, the second external thread of the damper and the second internal thread of the housing are connected in a matching connection area by welding.

[0018] As a further improvement of the present invention, a first flexible circuit component is provided in the second installation cavity, and the first flexible circuit component is used to electrically connect the temperature detection module with an external device.

[0019] As a further improvement of the present invention, a second flexible circuit component is provided in the third cavity, and the second flexible circuit component is used to electrically connect the pressure detection module with an external device.

[0020] The technical effect of the present application is: compared with the prior art, the temperature and pressure sensor provided by the utility model realizes simultaneous measurement of temperature and pressure by simultaneously setting a pressure detection module and a temperature detection module, has high integration, simplifies the structure of the temperature and pressure composite sensor, enables it to simultaneously complete the measurement of hydraulic temperature and pressure, and greatly reduces the product volume and weight while ensuring the pressure test accuracy and the use temperature zone. By setting a connecting piece to connect the shell through the first external thread and the first internal thread, the pressure resistance of the sensor is enhanced without changing the external dimensions of the sensor, so that the temperature and pressure sensor can be used under higher pressure conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only part of the embodiments of the utility model, rather than all the embodiments. For ordinary technicians in this field, without paying creative work, other drawings obtained based on these drawings all fall within the scope of protection of this application.

[0022] Figure 1 It is a three-dimensional diagram of a temperature and pressure sensor provided by an embodiment of the utility model;

[0023] Figure 2 It is a cross-sectional view of a temperature and pressure sensor provided by an embodiment of the utility model;

[0024] Figure 3 It is a three-dimensional diagram of a housing provided by an embodiment of the utility model;

[0025] Figure 4 This is a front view of the housing provided by the embodiment of the utility model

[0026] Figure 5 It is a three-dimensional diagram of a connecting piece provided by an embodiment of the utility model;

[0027] Figure 6 It is a top view of the connecting piece provided by the embodiment of the utility model;

[0028] Figure 7 It is a stereoscopic diagram of a damper provided by an embodiment of the utility model.

[0029] Among them, 1 is a shell, 11 is a first installation cavity, 111 is a first internal thread, 12 is a pressure inlet, 2 is a connecting piece, 21 is a through hole, 22 is a second installation cavity, 23 is a first external thread, 3 is a damper, 31 is a second external thread, 4 is a pressure detection module, and 5 is a temperature detection module. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0031] In order to make the description of the disclosed content more detailed and complete, the following is an illustrative description of the implementation method and specific examples of the utility model; however, this is not the only form of implementing or using the specific examples of the utility model. The implementation method covers the features of multiple specific examples and the method steps and their sequence for constructing and operating these specific examples. However, other specific examples can also be used to achieve the same or equal functions and step sequences. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0033] It should be understood that the terms "first", "second", etc. in the specification and claims of the present invention 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 invention described herein can be implemented in an order other than those illustrated or described herein.

[0034] In the description of the present invention, the terms "front", "rear", "top", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0035] Please refer to Figure 1-Figure 7 The utility model provides a temperature and pressure sensor to solve the problem of how to realize the sensor to measure temperature and pressure at the same time with good sealing performance.

[0036] For details, please refer to Figure 1A three-dimensional diagram of a temperature and pressure sensor provided for an embodiment of the utility model includes a housing 1, a connector 2 threadedly connected to the housing 1, a pressure detection module 4 and a temperature detection module 5 built into the connector 2. By simultaneously providing the pressure detection module 4 and the temperature detection module 5, simultaneous measurement of temperature and pressure is achieved, with high integration, and the structure of the temperature and pressure composite sensor is simplified, so that it can simultaneously complete the measurement of hydraulic temperature and pressure. On the premise of ensuring the pressure test accuracy and the use temperature range, the product volume and weight are greatly reduced, and the structure of the temperature and pressure composite sensor is simplified. By providing the connector 2 threadedly connected to the housing 1, the overall sealing performance is better, thereby ensuring the measurement accuracy and the accuracy of the measurement results, while further improving its high pressure resistance.

[0037] For further information, see Figure 2-6 The upper end of the housing 1 is provided with a first installation cavity 11, the inner wall of the first installation cavity 11 is provided with a first internal thread 111, and the lower end of the housing 1 is provided with a pressure inlet 12; the center of the connector 2 is provided with a through hole 21, the connector 2 is provided with a second installation cavity 22 near the through hole 21, the outer wall of the connector 2 is provided with a first external thread 23, and the connector 2 is connected to the housing 1 through the first external thread 23 and the first internal thread 111; the pressure detection module 4 is connected to the connector 2 through the through hole 21; the temperature detection module 5 is arranged in the second installation cavity 22. By arranging the connector 2 to be connected to the housing 1 through the first external thread 23 and the first internal thread 111, the pressure resistance of the sensor is enhanced without changing the external dimensions of the sensor, so that the temperature and pressure sensor can be used under high pressure conditions.

[0038] As a further improvement of the present invention, the first installation cavity 11 and the second installation cavity 22 are both cylindrical cavities, the inner diameter of the first installation cavity 11 is larger than the inner diameter of the second installation cavity 22 , and the through hole 21 is a cylindrical through hole 21 . The inner wall of the cylindrical chamber of the first installation cavity 11 is provided with a first internal thread 111, which cooperates with the first external thread 23 on the outer wall of the connecting member 2 to realize the threaded connection between the shell 1 and the connecting member 2, thereby ensuring the tightness of the connection between the shell 1 and the connecting member 2, enhancing the pressure resistance of the temperature and pressure sensor, and enabling the temperature and pressure sensor to be applied in a working environment with relatively high pressure. By setting the first installation cavity 11 as a cylindrical cavity, the first internal thread 111 and the first external thread 23 are tightened when they are connected, thereby further ensuring the pressure resistance of the temperature and pressure sensor. The second installation cavity 22 is smaller than the inner diameter of the first installation cavity 11, and the second installation cavity 22 is used to install and position the temperature detection module 5. Preferably, the temperature measurement function of the temperature detection module 5 can be realized by a platinum resistor, and a corresponding wire is arranged to be led out through the second installation cavity 22. After the medium temperature is transmitted to the platinum resistor, a temperature signal is output. The second installation cavity 22 is used as a temperature measurement channel to realize medium temperature measurement under the premise of occupying a small space, thereby greatly reducing the volume and weight of the product, and making the temperature and pressure sensor more lightweight and miniaturized.

[0039] As a further improvement of the present invention, see Figure 7 The first installation cavity 11 also contains a damper 3, the outer wall of the damper 3 is provided with a second external thread 31, the inner wall of the first installation cavity 11 is provided with a second internal thread, and the damper 3 is connected to the housing 1 through the second external thread 31 and the second internal thread. The damper 3 is connected to the pressure detection module 4 in the first cavity. The damper 3 is connected to the pressure inlet 12 through the third cavity. The connection between the damper 3 and the housing 1 is achieved by setting a second external thread 31 on the outer wall of the damper 3 and cooperating with the second internal thread on the inner wall of the first installation cavity 11, thereby further improving the sealing performance of the temperature and pressure sensor. By setting the damper 3 to reduce vibration and dissipate energy, when the temperature and pressure sensor performs pressure measurement, the hydraulic pressure can enter through the pressure inlet 12 and reach the damper 3 along the third cavity. After the damper 3 reduces the impact of the hydraulic pressure on the pressure detection module 4, the hydraulic pressure reaches the pressure detection module 4 after passing through the damper 3 for pressure measurement. The pressure detection module 4 senses the hydraulic pressure and outputs a pressure signal. By setting the damper 3, the liquid pressure is prevented from directly reaching the pressure detection module 4, thereby ensuring the strength of the pressure-resistant position, and making the temperature and pressure sensor have higher high-pressure resistance.

[0040] As a further improvement of the present invention, the pressure detection module 4 is connected to the through hole 21 by welding.

[0041] As a further improvement of the present invention, the first external thread 23 of the connecting piece 2 and the first internal thread 111 of the shell 1 are connected by welding in the matching connection area. Optionally, the welding method of the first external thread 23 of the connecting piece 2 and the first internal thread 111 of the shell 1 is laser welding. Laser welding makes the connection between the connecting piece 2 and the shell 1 tighter, further improving the sealing of the temperature and pressure sensor; the second external thread 31 of the damper 3 and the second internal thread of the shell 1 are connected by welding in the matching connection area. Optionally, the welding method of the second external thread 31 of the damper 3 and the second internal thread of the shell 1 is argon arc welding. Argon arc welding makes the connection between the damper 3 and the shell 1 tighter, ensuring that the pressure detection module 4 will not generate pressure leakage when measuring pressure, affecting the measurement accuracy, ensuring the pressure resistance, so that the temperature and pressure sensor has higher high pressure resistance performance, ensuring the measurement accuracy and the accuracy of the measurement results, while further improving its high pressure resistance.

[0042] As a further improvement of the present invention, a first flexible circuit component (not shown) is provided in the second cavity, and the first flexible circuit component is used to electrically connect the temperature detection module 5 with an external device. A second flexible circuit component (not shown) is provided in the third cavity, and the second flexible circuit component is used to electrically connect the pressure detection module 4 with an external device. By providing the first flexible circuit component and the second flexible circuit component to electrically connect the temperature detection module 5 and the pressure detection module 4 with an external device respectively, the temperature signal measured by the temperature detection module 5 and the pressure signal measured by the pressure detection module 4 can be output to the external device in a timely manner for display, thereby realizing the real-time measurement data display of the temperature and pressure of the temperature and pressure sensor, and improving the user experience.

[0043] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] The above embodiments only express the preferred implementation of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A temperature and pressure sensor, characterized in that: include, A housing, wherein a first installation cavity is disposed at the upper end of the housing, a first internal thread is disposed on the inner wall of the first installation cavity, and a pressure inlet is disposed at the lower end of the housing; A connecting piece, wherein a through hole is provided at the center of the connecting piece, a second mounting cavity is provided near the through hole, a first external thread is provided on the outer wall of the connecting piece, and the connecting piece is connected to the housing through the first external thread and the first internal thread; A pressure detection module, wherein the pressure detection module is connected to the connecting member through the through hole; A temperature detection module is disposed in the second installation cavity.

2. A temperature and pressure sensor according to claim 1, characterized in that: The first installation cavity and the second installation cavity are both cylindrical cavities, the inner diameter of the first installation cavity is greater than the inner diameter of the second installation cavity, and the through hole is a cylindrical through hole.

3. A temperature and pressure sensor according to claim 2, characterized in that: A damper is also accommodated in the first installation cavity. The outer wall of the damper is provided with a second external thread, and the inner wall of the first installation cavity is provided with a second internal thread. The damper is connected to the housing through the cooperation of the second external thread and the second internal thread.

4. A temperature and pressure sensor according to claim 3, characterized in that: The damper is in communication with the pressure detection module in the first installation cavity.

5. A temperature and pressure sensor according to claim 4, characterized in that: The damper is communicated with the pressure inlet through a third cavity.

6. A temperature and pressure sensor according to claim 1, characterized in that: The pressure detection module is connected to the through hole by welding.

7. A temperature and pressure sensor according to claim 1, characterized in that: The first external thread of the connecting member and the first internal thread of the housing are connected in a matching connection area by welding.

8. A temperature and pressure sensor according to claim 3, characterized in that: The second external thread of the damper is connected to the second internal thread of the housing in a matching connection area by welding.

9. A temperature and pressure sensor according to claim 1, characterized in that: A first flexible circuit component is disposed in the second installation cavity, and the first flexible circuit component is used to electrically connect the temperature detection module with an external device.

10. The temperature and pressure sensor according to claim 5, characterized in that: A second flexible circuit component is disposed in the third cavity, and the second flexible circuit component is used to electrically connect the pressure detection module with an external device.

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