A high-pressure resistant temperature sensor

Abstract

This utility model relates to the field of temperature sensor technology and discloses a high-pressure resistant temperature sensor, including a housing made of high-strength material, having a convex surface A that directly contacts the medium inside the high-pressure chamber and a sealing surface C that contacts the solid surface of the high-pressure chamber cover; a thermistor element disposed within the housing for detecting the temperature of the medium inside the high-pressure chamber; a wire, one end connected to the thermistor element, and the other end led out to the outside through an opening in the solid part of the high-pressure chamber; and a sealing assembly disposed on the sealing surface for achieving high-pressure sealing under pressures of 200-600 MPa. By directly measuring the temperature of the high-pressure chamber, the medium inside the high-pressure chamber can be accurately measured, significantly improving the measurement accuracy. The measurement results can be used to effectively control the external heating system for precise temperature compensation, enabling rapid and accurate heating of the high-pressure chamber, ensuring that the products inside the high-pressure chamber highly conform to process requirements, thereby improving product quality and stability.

Description

Technical Field

[0001] This utility model relates to the field of temperature sensor technology, and in particular to a high-pressure resistant temperature sensor. Background Technology

[0002] In isostatic pressing equipment, current technology typically measures the temperature outside the high-pressure chamber. The heating medium is usually hot oil, which circulates through channels inside and outside the high-pressure chamber to heat it. Before normal operation, the high-pressure chamber needs to be heated, or preheated, to reach the process temperature. Only after reaching the process temperature can the high-pressure chamber meet the operating conditions. During operation, the pressure in the high-pressure chamber typically reaches 300-600 MPa, and the temperature reaches 100-200 degrees Celsius. Directly measuring the temperature of the medium inside the high-pressure chamber during this process becomes difficult.

[0003] Therefore, the purpose of this utility model is to provide a high-pressure resistant temperature sensor and its installation method to overcome the shortcomings of the prior art. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a high-pressure resistant temperature sensor, which aims to improve the problem that the existing technology cannot directly measure the temperature of the medium inside the chamber, thus making it impossible to accurately control the temperature of the medium inside the high-pressure chamber.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a high-pressure resistant temperature sensor, comprising: The shell is made of high-strength material and has a convex surface A that is in direct contact with the medium inside the high-pressure chamber and a sealing surface C that is in contact with the solid surface of the high-pressure chamber cover. The thermal element installed inside the housing is used to detect the temperature of the medium inside the high-pressure chamber. One end of the wire is connected to the thermistor, and the other end is led out to the outside through an opening in the high-pressure chamber body. The sealing assembly disposed on the sealing surface C is used to achieve high-pressure sealing under pressure of 200-600 MPa.

[0006] As a further description of the above technical solution: The sealing assembly includes a flexible O-ring and a metal gasket. The metal gasket has an angled structure, and the flexible O-ring and the metal gasket are sequentially attached to the sealing surface C.

[0007] As a further description of the above technical solution: The shell is made of high-strength steel, and both the convex surface A and the shell surface D are in direct contact with the medium inside the high-pressure chamber.

[0008] As a further description of the above technical solution: The housing is filled with filler, which wraps around the thermistor and the connection end of the wire to fix the thermistor.

[0009] As a further description of the above technical solution: The soft O-ring is made of high-pressure resistant elastic material, and the angle of the metal washer is 30°-60°.

[0010] This utility model has the following beneficial effects: 1. In this utility model, the medium inside the high-pressure chamber is accurately measured by directly measuring the temperature of the high-pressure chamber, which greatly improves the measurement accuracy. The measurement results are used to effectively control the external heating system for precise temperature compensation. In this way, the temperature of the medium can be accurately controlled and adjusted at any time. This solution is simple and easy to implement, and can quickly and accurately heat up the high-pressure chamber, ensuring that the products inside the high-pressure chamber are highly consistent with the process requirements, thereby improving product quality and stability.

[0011] 2. In this utility model, by setting a sealing assembly consisting of a soft O-ring and an angled metal gasket on the sealing surface C, the elastic deformation of the soft O-ring fills the gap and the rigidity of the metal gasket disperses the pressure, thereby achieving reliable sealing under ultra-high pressure environments of 200-600 MPa. This effectively prevents media leakage, provides a safe and stable working environment for the internal components of the sensor, and ensures the long-term stable operation of the equipment under extreme pressure.

[0012] 3. In this invention, the thermistor and wire connection ends are encased in a filling material within the housing, enhancing the overall structure's impact resistance and preventing measurement deviations caused by vibration or displacement of the component under high pressure. Simultaneously, the design of leading the wires through a solid opening in the high-pressure chamber and filling it with sealant prevents damage from high-pressure compression and ensures stable temperature signal transmission. These designs enable the sensor to maintain stable operation even under severe pressure fluctuations, improving the equipment's versatility and flexibility, reducing production interruptions due to equipment failure, and thus increasing production efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main body of the present invention; Figure 2 This is a side view of the O-ring and metal washer of the present invention; Figure 3 This is a schematic diagram of the soft O-ring structure of the present invention; Figure 4 This is a schematic diagram of region B of the present invention; Figure 5 This is a schematic diagram of the sealing ring of the present invention.

[0014] Legend: The components include: 1. Housing; 2. Thermistor; 3. Wire; 4. Filler; 5. Soft O-ring; 6. Metal gasket. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Reference Figure 1-5 One embodiment of this utility model is a high-pressure resistant temperature sensor, comprising: The shell 1 is made of high-strength material and has a convex surface A that is in direct contact with the medium inside the high-pressure chamber and a sealing surface C that is in contact with the solid surface of the high-pressure chamber cover. The thermal element 2, installed inside the housing 1, is used to detect the temperature of the medium inside the high-pressure chamber; One end of the wire 3 is connected to the thermal element 2, and the other end is led out to the outside through the opening in the solid part of the high-pressure chamber; The sealing assembly, located on the sealing surface C, is used to achieve high-pressure sealing under pressures of 200-600 MPa.

[0017] The sealing assembly includes a flexible O-ring 5 and a metal gasket 6. The metal gasket 6 has an angled structure, and the flexible O-ring 5 and the metal gasket 6 are sequentially attached to the sealing surface C. Specifically, the sealing assembly includes a flexible O-ring 5 and a metal gasket 6, which work together to form a highly efficient sealing structure. The metal gasket 6 has an angled structure, which allows the pressure to be evenly distributed on the gasket surface, avoiding excessive local stress that could lead to seal failure. The flexible O-ring 5 and the metal gasket 6 are sequentially attached to the sealing surface C, with the flexible O-ring 5 closer to the sealing surface C and the metal gasket 6 on the outer side. When pressure is applied, the metal gasket 6 can evenly transfer the pressure to the flexible O-ring 5, causing it to undergo elastic deformation and tightly fill the gap between the sealing surface and the cover, achieving a reliable seal.

[0018] The shell 1 is made of high-strength steel, and both the convex surface A and the D surface of the shell 1 are in direct contact with the medium inside the high-pressure chamber. Specifically, the shell 1 is made of high-strength steel, which undergoes a special heat treatment process, resulting in extremely high tensile and yield strength. It can withstand working pressures of 300-600 MPa without plastic deformation. Both the convex surface A and the D surface of the shell 1 are in direct contact with the medium inside the high-pressure chamber. This multi-contact surface design further expands the temperature sensing range, enabling the thermistor 2 to acquire medium temperature information more comprehensively and quickly, thus improving the accuracy and timeliness of temperature measurement.

[0019] The housing 1 is filled with filler 4, which wraps the connection end of the thermal element 2 and the wire 3 to fix the thermal element 2. Specifically, the housing 1 is filled with filler 4, which is made of a material that is resistant to high temperature and high pressure and has good adhesion. The filler 4 wraps around the connection ends of the thermistor 2 and the wire 3. On the one hand, it can firmly fix the thermistor 2 in the housing 1, preventing displacement due to vibration or pressure fluctuations under high pressure environment and ensuring temperature measurement accuracy; on the other hand, it can enhance the impact resistance of the overall structure, so that the sensor can maintain structural stability under drastic pressure changes and extend its service life.

[0020] The soft O-ring 5 is made of high-pressure resistant elastic material, and the angle of the metal washer 6 is 30°-60°. Specifically, the flexible O-ring 5 is made of a high-pressure resistant elastic material. This material has excellent elastic recovery and resistance to media corrosion. After deformation under high pressure, it can quickly rebound and maintain a continuous sealing state. It can also withstand working temperatures of 100-200 degrees Celsius and is not prone to aging. The angle of the metal gasket 6 is 30°-60°. This angle range allows the metal gasket 6 to evenly transmit force to the flexible O-ring 5 when under pressure. This ensures that the flexible O-ring 5 can fully deform to achieve a seal, while avoiding uneven pressure distribution due to improper angle. This ensures that the sealing assembly can work reliably for a long time in ultra-high pressure environments of 300-600 MPa.

[0021] Working Principle: First, the housing 1, as the core load-bearing component, is made of high-strength steel. Its convex surface A directly contacts the medium inside the high-pressure chamber, and surface D also participates in medium contact. This multi-contact surface design expands the sensing range of the temperature sensing element, ensuring that the thermistor 2 can capture subtle changes in the medium temperature in real time. Thermistor 2 is encapsulated inside the housing 1 and connected to external equipment via wires 3. The filler 4 inside the housing 1 forms a stable enclosure for the thermistor 2 and the connection end of the wires 3. This not only avoids measurement deviations caused by vibration or displacement of the element under high pressure but also enhances the overall structure's impact resistance, allowing the sensor to maintain a stable working state even under severe pressure fluctuations.

[0022] The flexible O-ring 5 is made of high-pressure resistant elastic material and has good deformation capacity. When subjected to external pressure, it can tightly fit the sealing surface C and the solid surface of the high-pressure chamber cover, filling tiny gaps. The metal gasket 6 with an angle of 30°-60° evenly distributes the pressure through its rigid structure, preventing the flexible O-ring 5 from failing due to excessive local stress. This composite design of elastic sealing and rigid support can maintain sealing performance even under extreme pressures of 300-600 MPa, effectively preventing media leakage and providing a safe working environment for internal components.

[0023] During installation, first, the sealing surface C of the sensor is placed against the solid surface of the high-pressure chamber cover, ensuring that the convex surface A faces the medium inside the chamber. This step lays the foundation for subsequent direct temperature measurement. Next, the sealing components are installed in the order of soft O-ring 5 first, followed by metal gasket 6, ensuring a tight fit between the seals. Then, the sensor is pressed and fixed in place by flanges and bolts. During the bolt tightening process, the metal gasket 6 generates preload and compresses the soft O-ring 5, forming an initial seal. The internal pressure of the high-pressure chamber during operation further enhances the fit of the seals, achieving a pressure-reinforced sealing effect. Finally, the wire 3 is led out through an opening in the solid part of the high-pressure chamber. The diameter of the opening is smaller than the diameter of the wire 3 and is filled with sealant. This prevents the wire 3 from being damaged by high pressure and avoids leakage of the medium through the opening, ensuring stable transmission of the temperature signal to the external control system.

[0024] In operation, when the temperature of the medium inside the high-pressure chamber changes, the thermistor 2 quickly senses the temperature signal through its convex surfaces A and D, converts it into an electrical signal, and transmits it to external equipment via wire 3. Because the sensor is in direct contact with the medium, it avoids the heat conduction loss and hysteresis problems caused by indirect temperature measurement in existing technologies, significantly reducing measurement errors. Based on real-time temperature data, the external control system can precisely adjust the heating system to compensate for the temperature in the high-pressure chamber. For example, when the medium temperature is detected to be lower than the process requirements, the heating power is increased promptly; when the temperature is too high, the heating intensity is automatically reduced, thereby achieving dynamic temperature balance of the medium. This closed-loop control mechanism not only ensures that the temperature inside the high-pressure chamber always meets the process standards, but also reduces heating time through rapid response, improving production efficiency, while avoiding product quality deviations caused by temperature fluctuations, significantly enhancing product stability.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-pressure resistant temperature sensor, characterized in that, include: The shell (1) is made of high-strength material and has a convex surface A that is in direct contact with the medium inside the high-pressure chamber and a sealing surface C that is in contact with the solid surface of the high-pressure chamber cover; The thermal element (2) installed inside the housing (1) is used to detect the temperature of the medium inside the high-pressure chamber; One end of the wire (3) is connected to the thermal element (2), and the other end is led out to the outside through the opening of the high-pressure chamber body; The sealing assembly disposed on the sealing surface C is used to achieve high-pressure sealing under pressure of 200-600 MPa.

2. The high-pressure resistant temperature sensor according to claim 1, characterized in that, The sealing assembly includes a soft O-ring (5) and a metal gasket (6). The metal gasket (6) has an angled structure, and the soft O-ring (5) and the metal gasket (6) are sequentially attached to the sealing surface C.

3. The high-pressure resistant temperature sensor according to claim 1, characterized in that, The shell (1) is made of high-strength steel, and the convex surface A and the D surface of the shell (1) are in direct contact with the medium inside the high-pressure chamber.

4. A high-pressure resistant temperature sensor according to claim 1, characterized in that, The housing (1) is filled with filler (4), which wraps the connection end of the thermistor (2) and the wire (3) to fix the thermistor (2).

5. A high-pressure resistant temperature sensor according to claim 2, characterized in that, The soft O-ring (5) is made of high-pressure resistant elastic material, and the angle of the metal washer (6) is 30°-60°.

Images