A temperature measuring fixture

Abstract

The utility model discloses a temperature measuring fixing device relates to temperature gauge installation technical field, including threaded connector, butt joint screw hole, internal protective sleeve, outer protective sleeve, the outer protective sleeve is used for first contact process medium, bears scouring, corrosion, pressure and most mechanical stress, the internal protective sleeve is used for providing the insertion space for temperature sensor, the utility model discloses through setting outer protective sleeve, internal protective sleeve, through outer protective sleeve bears scouring, corrosion, pressure and most mechanical stress, makes internal protective sleeve can make thinner, its thermal response speed is far faster than a single -layer thick wall sheath that is made for bearing the same mechanical strength, and the medium layer flow slowly in the outer protective sleeve and internal protective sleeve middle, has played " damping " effect, can buffer the quick fluctuation of process medium temperature, makes the measured value more stable.

Description

Technical Field

[0001] This utility model relates to the field of thermometer installation technology, specifically a temperature measurement fixing device. Background Technology

[0002] A temperature sensor is a temperature measurement device that can sense temperature and convert it into a usable output signal. A mounting sleeve, also known as a protective sleeve, is a mechanical structural component installed outside a temperature sensor (such as a thermocouple or resistance temperature detector). Its main function is to protect the fragile and expensive temperature sensor, enabling it to work safely and for a long time in harsh industrial environments.

[0003] The mounting sleeve provides key protection in the following aspects: 1. Mechanical protection: to prevent damage caused by high-speed flow of the medium, scouring or impact of solid particles or materials; 2. Chemical corrosion protection: Prevents corrosive and toxic process media from directly contacting and corroding the sensor; 3. Pressure protection: Withstands the pressure inside process pipelines or equipment to prevent media leakage; 4. Thermal stress / thermal shock protection: In high-temperature or rapidly changing environments, the sheath can buffer thermal stress and prevent the sensor from being damaged due to uneven thermal expansion and contraction. 5. Easy to maintain: The sensor can be removed from the sheath for calibration, repair or replacement without the need to stop the machine or drain the process medium; Since the sheath increases the thermal resistance and mass between the sensor and the measured medium, it will increase the system's time constant and slow down the response. Therefore, the wall thickness of the sheath needs to be set as thin as possible. However, in order to ensure sufficient mechanical protection strength, the wall thickness of the sheath cannot be optimized to be thinner. Based on this, a temperature measurement fixing device is provided. Utility Model Content

[0004] The purpose of this invention is to provide a temperature measurement fixing device in order to solve the problems mentioned above.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a temperature metering fixing device, comprising a threaded connector and a mating screw hole, wherein the mating screw hole is formed on the top of the threaded connector, and an inner protective sleeve communicating with the inner cavity of the threaded connector is fixed at the bottom of the threaded connector, and an outer protective sleeve distributed on the outside of the inner protective sleeve is also fixed at the bottom of the threaded connector. The bottom of the inner protective sleeve is sealed, and the inner diameter of the outer protective sleeve is larger than the outer diameter of the inner protective sleeve, while the bottom of the outer protective sleeve is open. The outer protective sleeve is used to contact the process medium first and withstand scouring, corrosion, pressure and most of the mechanical stress, while the inner protective sleeve is used to provide an insertion space for the temperature sensor.

[0006] As a further embodiment of this utility model: the outer protective sleeve has a wall thickness of 1.5mm-3.0mm, the inner protective sleeve has a wall thickness of 0.5mm-1.5mm, and the gap between the outer protective sleeve and the inner protective sleeve is set between 1mm-3mm.

[0007] As a further improvement of this utility model: the height of the outer protective sleeve is less than the height of the inner protective sleeve, and the height difference between the bottom of the outer protective sleeve and the bottom of the inner protective sleeve is 10mm-30mm.

[0008] As a further improvement of this utility model: the outer protective sleeve has a flow groove on its outer side that communicates with the inner cavity of the outer protective sleeve. The flow groove is arranged in multiple groups from top to bottom, and each group of the flow groove is composed of multiple straight grooves distributed in a ring.

[0009] As a further improvement of this utility model, the two adjacent vertical sets of flow channels are staggered in opposite directions along the annular axis.

[0010] Compared with the prior art, the beneficial effects of this utility model are: By setting up an outer protective sleeve and an inner protective sleeve, the outer protective sleeve withstands scouring, corrosion, pressure, and most of the mechanical stress, allowing the inner protective sleeve to be made thinner. Its thermal response speed is much faster than that of a single-layer thick-walled sleeve made to withstand the same mechanical strength. In addition, the medium layer between the outer and inner protective sleeves flows slowly, playing a "damping" role, which can buffer the rapid fluctuations in the temperature of the process medium and make the measured values ​​more stable. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural schematic diagram from another perspective of the present invention; Figure 3 This is a cross-sectional view of the structure of this utility model.

[0012] In the diagram: 1. Threaded connector; 2. Butt screw hole; 3. Inner protective sleeve; 4. Outer protective sleeve; 5. Flow groove. Detailed Implementation

[0013] 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.

[0014] Please see Figures 1-3 In this embodiment of the present invention, a temperature metering fixing device includes a threaded connector 1 and a mating screw hole 2. The mating screw hole 2 is formed on the top of the threaded connector 1. An inner protective sleeve 3 that communicates with the inner cavity of the threaded connector 1 is fixed at the bottom of the threaded connector 1. An outer protective sleeve 4 distributed on the outside of the inner protective sleeve 3 is also fixed at the bottom of the threaded connector 1. The bottom of the inner protective sleeve 3 is sealed, and the inner diameter of the outer protective sleeve 4 is larger than the outer diameter of the inner protective sleeve 3, and the bottom of the outer protective sleeve 4 is open. The outer protective sleeve 4 is used to contact the process medium first and withstand scouring, corrosion, pressure and most of the mechanical stress, while the inner protective sleeve 3 is used to provide an insertion space for the temperature sensor.

[0015] In this embodiment, it should be noted that the threaded connector 1 has threads formed on the outside for threaded connection and fixation with the reserved detection port on the equipment. The threaded connector 1 can also be configured as a flange connection or a fixed connection structure as needed. The temperature sensor is assembled with the threaded connector 1 by threaded connection with the mating screw hole 2. When in use, the outer protective sleeve 4 is thick and has an open bottom, which can act as a mechanical and chemical protective barrier: it first comes into contact with the process medium and bears the scouring, corrosion, pressure and most of the mechanical stress. The bottom opening ensures that the medium can flow into the cavity between the inner and outer layers without obstruction. The inner protective sleeve 3 is thin and sealed at the bottom. Its main function is to provide a stable heat conduction environment for the sensor. It is immersed in the relatively "static" medium introduced by the outer protective sleeve 4. Due to its thin wall and low thermal resistance, it can quickly transfer heat from the medium to the sensor inside. Since the outer protective sleeve 4 undertakes all the "dirty and tiring work", the inner protective sleeve 3 can be made thinner. Its thermal response speed is much faster than that of a single-layer thick-walled sleeve made to withstand the same mechanical strength. In addition, the medium layer between the outer protective sleeve 4 and the inner protective sleeve 3 flows slowly, which plays a "damping" role. It can buffer the rapid fluctuation of the process medium temperature, making the measured value more stable and closer to the average temperature of the medium, rather than the temperature that changes drastically in an instant. It should be noted that this device is suitable for relatively clean liquid or gaseous media that are not prone to scaling, but is extremely unsuitable for slurries, mud, easily crystallizing or viscous media (high risk of clogging). It should also be noted that the outer protective sleeve 4 can be designed to be detachable. If the outer protective sleeve 4 is damaged due to corrosion or erosion, only the outer protective sleeve 4 can be replaced, while the inner protective sleeve 3 and the sensor can be retained, which may reduce maintenance costs.

[0016] Please refer to this carefully. Figures 1-3 The outer protective sleeve 4 has a wall thickness of 1.5mm-3.0mm, the inner protective sleeve 3 has a wall thickness of 0.5mm-1.5mm, and the gap between the outer protective sleeve 4 and the inner protective sleeve 3 is set between 1mm and 3mm. The height of the outer protective sleeve 4 is less than the height of the inner protective sleeve 3, and the height difference between the bottom of the outer protective sleeve 4 and the bottom of the inner protective sleeve 3 is 10mm-30mm.

[0017] In this embodiment: the thickness of the outer protective sleeve 4 and the inner protective sleeve 3 can be adjusted according to the working conditions, for example: The outer protective sleeve 4 has a thickness of 2.0 mm, which is sufficient to withstand pressure and provide mechanical strength; Inner protective sleeve thickness: 1.0 mm: as thin as possible while ensuring machinability; Gap: 1.5 mm, ensuring smooth flow of the medium and achieving efficient response; Height difference: The bottom of the outer protective sleeve 4 is 15mm shorter than that of the inner protective sleeve 3, so that the bottom opening of the outer protective sleeve 4 is not blocked by the bottom of the inner protective sleeve 3, which is conducive to convection circulation.

[0018] Please refer to this carefully. Figures 1-3 The outer protective sleeve 4 has a flow groove 5 that communicates with the inner cavity of the outer protective sleeve 4. The flow groove 5 is arranged in multiple groups from top to bottom, and each group of flow grooves 5 is composed of multiple straight grooves distributed in a ring.

[0019] In this embodiment: the flow groove 5 allows the medium to directly contact the side wall of the inner protective sleeve through the flow groove 5. The flow groove 5 and the bottom opening of the outer protective sleeve 4 work together to form a more efficient and three-dimensional convection channel between the inner and outer protective sleeves. The medium can enter from multiple positions at the bottom and sides and flow out from the top or other positions, ensuring that the medium in the jacket is constantly renewed and the temperature is consistent with the mainstream, avoiding the occurrence of local high temperature or low temperature "dead zones".

[0020] Please refer to this carefully. Figures 1-3 The two adjacent vertical flow channels 5 are staggered in opposite directions along the annular ring.

[0021] In this embodiment, this structure is used to ensure that the outer protective sleeve 4 has sufficient structural strength.

[0022] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A temperature metering fixing device, comprising a threaded connector (1) and a mating screw hole (2), wherein the mating screw hole (2) is formed on the top of the threaded connector (1), characterized in that, The bottom of the threaded connector (1) is fixed with an inner protective sleeve (3) that communicates with the inner cavity of the threaded connector (1), and the bottom of the threaded connector (1) is also fixed with an outer protective sleeve (4) distributed on the outside of the inner protective sleeve (3). The bottom of the inner protective sleeve (3) is sealed, and the inner diameter of the outer protective sleeve (4) is larger than the outer diameter of the inner protective sleeve (3) and the bottom of the outer protective sleeve (4) is open. The outer protective sleeve (4) is used to contact the process medium first and withstand scouring, corrosion, pressure and most of the mechanical stress, while the inner protective sleeve (3) is used to provide an insertion space for the temperature sensor.

2. The temperature metering fixing device according to claim 1, characterized in that, The outer protective sleeve (4) has a wall thickness of 1.5mm-3.0mm, the inner protective sleeve (3) has a wall thickness of 0.5mm-1.5mm, and the gap between the outer protective sleeve (4) and the inner protective sleeve (3) is set between 1mm-3mm.

3. The temperature metering fixing device according to claim 1, characterized in that, The height of the outer protective sleeve (4) is less than the height of the inner protective sleeve (3), and the height difference between the bottom of the outer protective sleeve (4) and the bottom of the inner protective sleeve (3) is 10mm-30mm.

4. The temperature metering fixing device according to claim 1, characterized in that, The outer protective sleeve (4) has a flow groove (5) that communicates with the inner cavity of the outer protective sleeve (4). The flow groove (5) is arranged in multiple groups from top to bottom, and each group of the flow groove (5) is composed of multiple annularly distributed straight grooves.

5. A temperature metering fixing device according to claim 4, characterized in that, The two adjacent vertical flow channels (5) are staggered in opposite directions along the ring.

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