Detectable explosion-proof temperature sensing device
By designing an inert gas sealed cavity and a multi-stage sealing system in the temperature sensing device, the explosion-proof problem of the sensor in flammable and explosive environments is solved, achieving efficient explosion-proof and high-precision temperature measurement.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-15
- Publication Date
- 2026-04-10
AI Technical Summary
Existing temperature sensing devices have poor explosion-proof performance in environments where petroleum gas or natural gas is produced or extracted, as high temperatures or electrical sparks may ignite the petroleum gas or natural gas.
The design employs a sealed cavity filled with inert gas between the heat-insulating sleeve and the temperature sensor. Combined with a multi-stage dynamic sealing system consisting of a spring-reset gas check valve, a threaded sealing cap, and an elastic high-temperature resistant sealing gasket, it forms an inert gas isolation barrier, actively preventing the infiltration of external combustible gases and suppressing the leakage of internal electric sparks.
It effectively isolates external flammable gases from contact with the sensor, preventing explosions caused by electrical sparks or high temperatures, significantly improving explosion-proof performance, extending the device's service life, and maintaining temperature measurement sensitivity.
Smart Images
Figure CN224108944U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to detectable anti -explosion temperature sensing device technical field, concretely is a detectable anti -explosion temperature sensing device. BACKGROUND
[0002] The temperature sensor detection device disclosed in the utility model with the publication number CN216050372U includes a detection assembly and a heating assembly, the detection assembly includes a detection barrel, the top surface of the detection barrel is provided with a through hole, a support is arranged on the bottom surface of the detection barrel, the heating assembly is installed on the open end of the detection barrel, a plurality of threaded barrels are fixedly and uniformly arranged on the outer circumference of the detection barrel, and the threaded barrels are provided with a mounting barrel.
[0003] It can detect the temperature sensor, ensure the detection accuracy, and improve the detection effectiveness.
[0004] The technical scheme in the comparative document has the effect of ensuring detection accuracy, but the defects are more obvious, such as in the environment of oil gas or natural gas preparation or exploitation, when the temperature detection sensing device is used to detect the temperature, the high temperature or electric spark generated by the working of the temperature detection sensing device may cause the ignition of oil gas or natural gas, and the explosion-proof effect of the temperature detection sensing device is poor. UTILITY MODEL CONTENTS
[0005] In view of the defects of the prior art, the utility model provides a detectable anti -explosion temperature sensing device, which solves the problem that in the environment of oil gas or natural gas preparation or exploitation, when the temperature detection sensing device is used to detect the temperature, the high temperature or electric spark generated by the working of the temperature detection sensing device may cause the ignition of oil gas or natural gas, and the explosion-proof effect of the temperature detection sensing device is poor.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a detectable anti -explosion temperature sensing device, including, temperature sensor, the surface of temperature sensor is sleeved with heat -insulating sleeve, the top surface of heat -insulating sleeve is equipped with inlet pipe, installs gas check valve in inlet pipe, the top end of gas check valve is connected sealing cover through screw thread, the inner top wall of sealing cover is fixed with sealing rubber ring;
[0007] The interlayer between the heat -insulating sleeve and the temperature sensor forms a sealed cavity filled with inert gas, the end of the heat -insulating sleeve is fixed with a ring-shaped sealing gasket, and the inner circle of the sealing gasket is in interference fit with the detection end of the temperature sensor.
[0008] In a specific embodiment, the gas check valve is a spring return type structure, the valve body is made of corrosion-resistant metal, and the threaded connection part of the sealing cover is provided with an annular groove matched with the sealing rubber ring.
[0009] In a specific embodiment, the inert gas is nitrogen, and a positive pressure environment is maintained in the cavity of the heat insulation sleeve.
[0010] In a specific embodiment, the inner diameter of the sealing gasket is smaller than the outer diameter of the detection end of the temperature sensor, forming a dynamic sealing interface.
[0011] In a specific embodiment, the heat insulation sleeve is a composite layer structure, including a metal substrate layer and a surface heat insulation coating layer, and the thermal expansion coefficient of the heat insulation coating layer is lower than that of the metal substrate layer.
[0012] In a specific embodiment, the metal substrate layer is made of stainless steel, and the surface heat insulation coating layer is a ceramic coating layer.
[0013] Compared with the prior art, the utility model provides a kind of detectable explosion-proof temperature sensing device, with the following beneficial effects:
[0014] In the technical scheme disclosed by the utility model, the inert gas is filled in the sealed cavity between the heat insulation sleeve and the temperature sensor, and a multistage dynamic sealing system of spring return type gas one-way valve, threaded sealing cover and elastic high-temperature-resistant sealing gasket is combined to form an inert gas isolation barrier in the flammable and explosive environment, actively block the infiltration of external combustible gas and inhibit the leakage of internal electric spark, realize the intrinsic explosion-proof from the dual dimensions of physical isolation and pressure control, and completely eliminate the safety hazards of traditional temperature sensor 1 caused by high temperature or electric spark igniting petroleum gas or natural gas.
[0015] The sealed cavity formed by the heat insulation sleeve and the temperature sensor filled with inert gas and maintained in a positive pressure environment can effectively isolate the external combustible gas from contacting the sensor, avoid explosion caused by electric spark or high temperature, and significantly improve the explosion-proof performance of the device in the high-risk environment of petroleum gas or natural gas; The heat insulation sleeve of composite layer structure combines stainless steel substrate layer and ceramic coating layer, with mechanical strength and heat insulation performance; By designing the thermal expansion coefficient of the heat insulation coating layer to be lower than that of the metal substrate layer, the structural deformation under high temperature can be reduced, the sealing stability of the cavity can be ensured, and the service life of the device can be prolonged; In terms of dynamic sealing structure design, the elastic high-temperature-resistant sealing gasket is interference-fitted with the detection end, forming a self-adapting deformation sealing interface, which not only ensures the freedom of the detection end, but also maintains airtightness under extreme temperature fluctuations, avoiding leakage of inert gas; The overall structure is isolated by inert gas, protected by multiple seals and applied with high-temperature-resistant materials, achieving the function of explosion-proof while not affecting the detection sensitivity of the temperature sensor, meeting the high-precision temperature measurement demand in flammable and explosive scenes. BRIEF DESCRIPTION OF DRAWINGS
[0016] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
[0017] Figure 1 It is the whole structure schematic diagram of the utility model;
[0018] Figure 2 It is the inert gas structure schematic diagram of the utility model;
[0019] Figure 3 It is the heat insulation sleeve structure schematic diagram of the utility model;
[0020] Figure 4 It is the split structure schematic diagram of the utility model.
[0021] In the drawing: 1, temperature sensor; 2, heat insulation sleeve; 3, air inlet pipe; 4, gas check valve; 5, sealing cover; 6, sealing rubber ring; 7, inert gas; 8, sealing gasket. DETAILED DESCRIPTION
[0022] The embodiments of the present application will be described in detail below with the accompanying drawings and embodiments, so that the realization process of how to apply technical means to solve technical problems and achieve technical effects of the present application can be fully understood and implemented.
[0023] Figures 1-4 For an embodiment of the utility model, a kind of detectable explosion-proof temperature sensing device, comprising, temperature sensor 1, the surface of temperature sensor 1 is sleeved with heat insulation sleeve 2, the top surface of heat insulation sleeve 2 is equipped with air inlet pipe 3, gas check valve 4 is installed in air inlet pipe 3, the top end of gas check valve 4 is connected sealing cover 5 by screw thread, and sealing cover 5 is fixed with sealing rubber ring 6 in inner top wall.
[0024] The specific problem that the specific embodiment is aimed at is that when using temperature detection sensing device to detect temperature in the environment of oil gas or natural gas preparation or exploitation, oil gas or natural gas may be ignited due to high temperature or electric spark generated by its work, and the explosion-proof effect of the temperature detection sensing device is poor. The utility model utilizes the design of inert gas 7 filled in the closed cavity between heat insulation sleeve 2 and temperature sensor 1, and the multistage dynamic sealing system of spring return type gas check valve 4, threaded sealing cover 5 and elastic high-temperature-resistant sealing gasket 8, to form inert gas 7 isolation barrier in flammable and explosive environment, actively block the infiltration of external combustible gas and inhibit the leakage of internal electric spark, realize intrinsic explosion-proof from physical isolation and pressure control dual dimensions, and completely eliminate the safety hazard that traditional temperature sensor is ignited by oil gas or natural gas due to high temperature or electric spark.
[0025] The interlayer between the heat insulation sleeve 2 and the temperature sensor 1 forms a sealed cavity filled with inert gas 7, the end of the heat insulation sleeve 2 is fixed with an annular sealing gasket 8, the inner ring of the sealing gasket 8 is in interference fit with the detection end of the temperature sensor 1, in the specific embodiment, the inert gas 7 is nitrogen, and the cavity in the heat insulation sleeve 2 maintains a positive pressure environment, the heat insulation sleeve 2 is a composite layer structure, including a metal base material layer and a surface heat insulation coating, and the thermal expansion coefficient of the heat insulation coating is lower than that of the metal base material layer. The sealed cavity formed by the heat insulation sleeve 2 and the temperature sensor 1 is filled with inert gas 7 and maintains a positive pressure environment, which can effectively isolate the external combustible gas from contacting the sensor, avoid explosion caused by electric spark or high temperature, and significantly improve the explosion-proof performance of the device in the high-risk environment of petroleum gas or natural gas; the heat insulation sleeve 2 with a composite layer structure is combined with a stainless steel base material layer and a ceramic coating, which has mechanical strength and heat insulation performance; by designing the thermal expansion coefficient of the heat insulation coating to be lower than that of the metal base material layer, the structural deformation under high temperature can be reduced, the cavity sealing stability can be ensured, and the service life of the device can be prolonged; in terms of dynamic sealing structure design, the elastic high-temperature-resistant sealing gasket 8 is in interference fit with the detection end, forming a self-adapting deformation sealing interface, which can not only ensure the freedom of the detection end, but also maintain the air tightness under extreme temperature fluctuations and avoid the leakage of inert gas 7; the overall structure is isolated by inert gas 7, multiple sealing protection and high-temperature-resistant material application, which realizes the explosion-proof function while not affecting the detection sensitivity of the temperature sensor 1, and meets the high-precision temperature measurement demand in the flammable and explosive scene.
[0026] In the specific embodiment, the top end of the gas one-way valve 4 is connected with the sealing cover 5 through threads, the inner top wall of the sealing cover 5 is fixed with the sealing rubber ring 6, the gas one-way valve 4 is a spring reset type structure, the valve body is made of corrosion-resistant metal, and the threaded connection part of the sealing cover 5 is provided with an annular groove matched with the sealing rubber ring 6; the cooperative design of the gas one-way valve 4 and the threaded sealing cover 5 adopts double sealing of the corrosion-resistant metal valve body and the sealing rubber ring 6, which can not only supplement the inert gas 7 through the gas inlet pipe 3, but also quickly seal the cavity, so as to ensure the long-term maintenance of the positive pressure environment.
[0027] The control mode of the utility model is automatically controlled through the controller, and the control circuit of the controller can be realized through simple programming of the person skilled in the art, and the power supply also belongs to the public knowledge in the art, and the utility model is mainly used for protecting the mechanical device, so the control mode and the circuit connection of the utility model will not be explained in detail.
[0028] It should be noted that in this paper, the term "includes", "contains" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device.
[0029] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A device for detecting explosion-proof temperature, comprising a temperature sensor (1), characterized in that: The surface of the temperature sensor (1) is fitted with a heat insulation sleeve (2), and the top surface of the heat insulation sleeve (2) is provided with an air inlet pipe (3). A gas one-way valve (4) is installed inside the air inlet pipe (3). The top of the gas one-way valve (4) is connected to a sealing cap (5) by a thread. A sealing rubber ring (6) is fixed on the inner top wall of the sealing cap (5). The interlayer between the heat insulation sleeve (2) and the temperature sensor (1) forms a sealed cavity filled with inert gas (7). An annular sealing gasket (8) is fixed at the end of the heat insulation sleeve (2). The inner ring of the sealing gasket (8) and the detection end of the temperature sensor (1) form an interference fit.
2. The explosion-proof temperature sensing device according to claim 1, characterized in that: The gas check valve (4) is a spring-reset type structure. Its valve body is made of corrosion-resistant metal, and the threaded connection part of the sealing cover (5) is provided with an annular groove that matches the sealing ring (6).
3. The explosion-proof temperature sensing device according to claim 1, characterized in that: The inert gas (7) is nitrogen, and the cavity of the heat insulation sleeve (2) maintains a positive pressure environment.
4. The explosion-proof temperature sensing device according to claim 1, characterized in that: The inner diameter of the sealing gasket (8) is smaller than the outer diameter of the detection end of the temperature sensor (1), forming a dynamic sealing interface.
5. The explosion-proof temperature sensing device according to claim 1, characterized in that: The heat insulation sleeve (2) has a composite layer structure, including a metal substrate layer and a surface heat insulation coating. The coefficient of thermal expansion of the heat insulation coating is lower than that of the metal substrate layer.
6. The explosion-proof temperature sensing device according to claim 5, characterized in that: The metal substrate layer is made of stainless steel, and the surface heat insulation coating is a ceramic coating.