CN210741682U - Explosion-proof temperature sensor - Google Patents
Explosion-proof temperature sensor Download PDFInfo
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- CN210741682U CN210741682U CN201921773211.3U CN201921773211U CN210741682U CN 210741682 U CN210741682 U CN 210741682U CN 201921773211 U CN201921773211 U CN 201921773211U CN 210741682 U CN210741682 U CN 210741682U
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- temperature
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Abstract
The utility model relates to a temperature sensor field especially relates to an explosion-proof temperature sensor. The utility model provides an explosion-proof temperature sensor, its temperature sensor probe body includes probe and casing, its characterized in that the casing holds the chamber with explosion-proof metal cable joint connection formation in, and temperature switch sets up in holding the chamber and the bottom is parallel and offset with the interior content chamber wall that is close to the probe, it has heat conduction silica gel and compresses tightly to fill in the content intracavity temperature switch, temperature switch can be direct and take place heat exchange with the probe through heat conduction silica gel. The structure is simple, and the universality is wide; the heat transfer performance and the heat conduction performance are faster and more sensitive; when the built-in temperature switch reaches a set temperature limit value, the whole working system is powered off and stops running, and the safety of equipment and operators is ensured.
Description
Technical Field
The utility model relates to a temperature sensor field especially relates to an explosion-proof temperature sensor.
Background
The common temperature sensor is suitable for common working occasions, but some production sites are often accompanied by various flammable and explosive chemical gases and steam, if the common temperature sensor is used, the common temperature sensor is very unsafe, and in the field of explosion-proof temperature sensors, the design structure of the sensor is too complex to achieve the national explosion-proof level, so that the sensor has no universality.
The invention discloses a high-temperature sensor for transient response in a complex environment, which comprises a thermocouple, a tool pressing cap of a tool base and a sealing plug, wherein the tool pressing cap of the tool base is provided with an installation cavity and a connector, the connector is provided with a connecting thread, the inner cavity wall of the installation cavity is provided with an internal thread, the tool pressing cap is provided with an external thread matched with the internal thread of the installation cavity, the tool pressing cap is connected with the end wall of the installation cavity of the tool base through the sealing plug, high-temperature-resistant insulating ceramic tubes are fixed at the axial centers of the connector of the tool base and the tool pressing cap, and the thermocouple penetrates through the tool base, the tool pressing cap and the sealing plug.
Disclosure of Invention
In order to solve the problem, the utility model aims to provide an explosion-proof temperature sensor, simple structure just can realize fast whether the temperature of measuring under the flammable and explosive environment target object reaches the limit temperature in order to reach explosion-proof requirement simultaneously.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides an explosion-proof temperature sensor, includes temperature sensor probe body, temperature switch and explosion-proof metal cable joint, and its temperature sensor probe body includes probe and casing, its characterized in that the casing holds the chamber in being connected with explosion-proof metal cable joint and forming, and temperature switch sets up in holding the intracavity and the bottom is parallel and offset with the content cavity wall that is close to the probe, it has heat conduction silica gel and compresses tightly to fill in the content cavity temperature switch, temperature switch can be direct and take place the heat exchange with the temperature sensor probe body through heat conduction silica gel. The bottom of the temperature switch is arranged at the bottom of the content cavity of the probe body of the temperature sensor closest to the probe, the temperature switch is close to the heat source, the heat transfer efficiency is high, the bottom surface and the bottom of the content cavity are parallel to each other and are in contact with each other, the contact area is as large as possible, heat conduction is more convenient, under the condition of unilateral heat conduction, the efficiency of heat conduction is further improved, heat conduction silica gel can be filled, the heat conduction silica gel is guided in, the temperature switch can be fixed, meanwhile, the heat exchange can be rapidly carried out between the temperature switch and the probe body of the temperature sensor through the contact of a plurality of angles and the temperature switch, the measurement accuracy is improved, and the heat conduction silica gel has certain elasticity, can deform in a certain amount when the heat conduction silica gel is installed, and then enters the inner cavity, and installation.
Further, at least one side surface of the temperature switch is parallel to and abutted against one side wall of the inner cavity. When the temperature switch is installed, the temperature switch can be placed in the middle of the bottom surface of the inner containing cavity firstly, and then the temperature switch is moved to one side to enable at least one side surface to be abutted to the side wall of the inner containing cavity, so that the temperature switch can be installed conveniently without considering the accurate positioning of the installation position of the temperature switch relative to the condition of being arranged in the middle of the bottom surface, and meanwhile, the temperature switch is prevented from being shaken and damaged, and the contact area between the temperature switch and the side wall of the inner containing cavity is increased.
Further, the shell is connected with the explosion-proof metal cable connector through threads. The threaded connection is convenient to install and disassemble, and meanwhile, the sealing performance of the inner containing cavity is guaranteed.
Furthermore, the number of the joggles at the threaded connection part is required to be more than 5 and the joggle length is required to be more than 8 mm. The requirements of the number of buttons and the meshing length enable the temperature sensor to meet the explosion-proof requirement.
Furthermore, the lower end of the explosion-proof metal cable connector extends into the inner containing cavity and compresses the heat-conducting silica gel. The lower end of the explosion-proof metal cable connector compresses the heat-conducting silica gel, so that the temperature switch is guaranteed to be compressed.
Furthermore, an outer ring is arranged on the explosion-proof metal cable connector and is abutted to the shell, so that the lower end of the explosion-proof metal cable connector can be prevented from excessively extending into the inner cavity.
Further, the probe is externally provided with an external thread. The probe body of the temperature sensor of the explosion-proof temperature sensor adopts a structure of the external thread of the probe body of the temperature sensor, and can be screwed and fixed with an internal thread structural member welded on the surface of an object to be measured, and actually, the probe body of the temperature sensor can also be connected with an internal thread structure which is originally existing on the object to be measured.
Further, a sealing ring is arranged between the explosion-proof metal cable joint and the flame-retardant cable with one end arranged therein
Through built-in sealing washer to the formation forms confined space in explosion-proof temperature sensor's inside, has guaranteed temperature sensor's leakproofness, avoids external environment's dust to get into, makes temperature sensor possess the explosion-proof performance requirement.
The utility model adopts the technical proposal, the structure is simple, and the utility model has wide universality; the temperature switch is parallel to and in contact with the side wall of the content cavity closest to the probe, so that the temperature switch is closer to a heat source and is pressed by using heat-conducting silica gel and coats the heat-conducting switch, heat is quickly transferred to the temperature switch, and the heat transfer performance and the heat conduction performance of the temperature sensor are quicker and more sensitive; the probe body of the temperature sensor is connected with the explosion-proof metal cable joint by adopting internal and external threads, and a threaded explosion-proof surface is formed at the contact part of the probe body and the explosion-proof metal cable joint, so that the explosion-proof performance requirement is met; when the built-in temperature switch reaches a set temperature limit value, the whole working system is powered off and stops running, and the safety of equipment and operators is ensured.
Drawings
Fig. 1 is a prior art explanatory diagram.
Fig. 2 is a cross-sectional view of the overall structure of the present invention.
Fig. 3 is an outline view of the probe body of the temperature sensor of the utility model.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The utility model provides an explosion-proof temperature sensor, is shown as figure 2 ~ 3, includes temperature sensor probe body, temperature switch 2 and explosion-proof metal cable joint 5, and its temperature sensor probe body includes probe 1 and casing 8, its characterized in that the casing holds the chamber in being connected with explosion-proof metal cable joint and forming, and temperature switch sets up in holding the intracavity and the bottom parallel and counterbalance with the interior content chamber wall that is close to the probe, it has heat conduction silica gel 3 and compresses tightly to fill in the content chamber temperature switch, temperature switch can be direct and take place the heat exchange with the temperature sensor probe body through heat conduction silica gel. The bottom of the temperature switch is arranged at the bottom of the inner cavity and is close to the heat conduction source, namely the probe, the heat transfer efficiency is high, the bottom surface of the temperature switch is parallel to and contacts with the bottom of the inner cavity, the contact area of the bottom surface of the temperature switch and the bottom of the inner cavity is increased as much as possible, the heat conduction is more convenient, and the temperature switch cannot contact with all side walls due to the heat shrink tube, under the condition of single-side heat conduction, in order to further improve the heat conduction efficiency, the heat conduction silica gel can be filled, the heat conduction silica gel is led in to fix the temperature switch, and simultaneously contacts with the temperature switch from a plurality of angles to help the temperature switch to exchange heat with the probe body of the temperature sensor more quickly, so that the measurement accuracy is improved, and the heat conduction silica gel has certain elasticity, can deform a certain amount when being installed and then enters the inner cavity, and the installation is more convenient.
Because the existence of pyrocondensation pipe 4, temperature switch can not contact with all lateral walls, and temperature switch can set up at the middle part of holding the chamber diapire including or offset with a part of lateral wall, and for the condition that temperature switch set up at the middle part of holding the chamber diapire in, set up temperature switch in one side, can arrange temperature switch in the bottom surface middle part earlier in the installation, offset temperature switch and lateral wall with fixed temperature switch's position again, and need not carry out spacingly specially again, the installation of the temperature switch of being more convenient for. The following are specific examples.
As shown in fig. 2, the right side of the temperature switch is parallel to and against the inner cavity side wall.
The shell and the explosion-proof metal cable are connected to form an inner containing cavity, a temperature switch and heat-conducting silica gel are required to be arranged in the inner containing cavity, the inner containing cavity is stable in structure and convenient to mount, and the inner thread and the outer thread are connected in a preferable implementation mode. The following are preferred embodiments.
As shown in fig. 2, the housing is connected with the explosion-proof metal cable joint through threads.
The threads are required to meet the requirements on the number of joggles and the length of joggles in order to ensure that the tightness of the inner cavity can meet certain requirements to prevent explosion. Therefore, the number of the joggles at the threaded connection part is required to be more than 5 and the joggle length is more than 8 mm.
The heat conduction silica gel compresses tightly temperature switch, so need have other parts to do further fixedly to heat conduction silica gel because heat conduction silica gel's elasticity. The following are preferred embodiments.
As shown in fig. 2, the lower end of the explosion-proof metal cable connector extends into the inner cavity and compresses the heat-conducting silica gel.
In order to prevent the lower end of the metal cable connector from extending too far into the inner cavity, a certain limit needs to be imposed on the extension length of the lower end of the connector, which is the following preferred embodiment.
As shown in fig. 2, the explosion-proof metal cable joint is provided with an outer ring 9 abutting against the housing.
In order to measure the temperature of an object, an explosion-proof temperature sensor needs to connect a sensor probe with the measured object, and the following embodiment adopts a structure of external threads of the probe body of the temperature sensor, and can be screwed and fixedly installed with an internal thread structural part welded on the surface of the object to be measured. The following are specific embodiments.
As shown in fig. 2, the probe is externally provided with external threads.
In order to meet the requirement of explosion prevention, a threaded explosion-proof surface is required to be formed between the explosion-proof metal cable connector and the object of the probe body of the temperature sensor for explosion prevention, and the explosion-proof metal cable connector and the flame-retardant cable 7 arranged in the explosion-proof metal cable connector are also required to be sufficiently sealed. The following are specific embodiments.
As shown in fig. 2, a packing 6 is provided between the explosion-proof metal cable joint and a flame-retardant cable 7 having one end provided therein.
Before measurement, the insulation resistance value of the two stages of the flame-retardant cable and the probe body of the temperature sensor needs to be ensured to be more than 2 megaohms. The surface of any object to be measured can be welded and fixed with a binding component with internal threads and a probe body of a temperature sensor, the probe body of the temperature sensor of the explosion-proof temperature sensor is contacted with the object to be measured and is screwed and fixed by threads, when the temperature of the object to be measured rises, heat can be rapidly transferred to heat-conducting silica gel through the probe body of the temperature sensor, the heat of the heat-conducting silica gel is transferred to a temperature switch, the temperature switch is provided with a temperature limit value, when the temperature of the object to be measured reaches the limit value set by the temperature switch, a disconnected switch signal can be generated in the temperature switch, so that the whole working system stops working or suspends working, and the object to be measured is prevented from being damaged even the whole working system because the temperature of the object to be; when the whole working system stops working and the temperature is reduced to the limit value set by the temperature switch, a closed switch signal is generated inside the temperature switch, and the whole system can continue working. Therefore, the safe and stable operation of the whole working system can be controlled and protected through the explosion-proof temperature sensor. In the same way, the explosion-proof temperature sensor can be applied to the working occasions needing explosion prevention, and the implementation mode is the same as that described.
The switching signal principle is that two sheets are arranged inside, when the temperature rises, the two copper sheets are disconnected (equivalent to the disconnection of a switch) through expansion with heat and contraction with cold, after the disconnection, a relay in an electrical system connected behind is disconnected, the whole system is also disconnected, and the whole system stops working, when the temperature falls, the two sheets are adhered together after contraction with cold, the switch is equivalent to the closing of the switch, and the circuit is equivalent to the closing of the circuit, so that the working can be continued.
Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention.
Claims (8)
1. The utility model provides an explosion-proof temperature sensor, includes temperature sensor probe body, temperature switch and explosion-proof metal cable joint, and its temperature sensor probe body includes probe and casing, its characterized in that the casing holds the chamber in being connected with explosion-proof metal cable joint and forming, and temperature switch sets up in holding the intracavity and the bottom is parallel and offset with the content cavity wall that is close to the probe, it has heat conduction silica gel and compresses tightly to fill in the content cavity temperature switch, temperature switch can be direct and take place the heat exchange with the temperature sensor probe body through heat conduction silica gel.
2. An explosion proof temperature sensor as claimed in claim 1, wherein at least one side wall of said temperature switch is parallel to and against a side wall of said inner chamber.
3. An explosion proof temperature sensor according to claim 1, wherein the housing is threadedly connected to the explosion proof metal cable connector.
4. An explosion proof temperature sensor according to claim 3, characterized in that the number of meshing engagements at said threaded connection is required to be 5 or more and the length of meshing is 8mm or more.
5. The explosion-proof temperature sensor of claim 1, 2 or 3, wherein the lower end of the explosion-proof metal cable connector extends into the inner cavity and compresses the heat-conducting silica gel.
6. An explosion proof temperature sensor according to claim 5, wherein the explosion proof metal cable connector is provided with an outer ring which abuts against the housing.
7. An explosion proof temperature sensor according to claim 6, wherein the probe is externally provided with external threads for connection to the object to be measured.
8. An explosion proof temperature sensor according to claim 7, wherein a sealing ring is provided between the explosion proof metal cable connector and the flame retardant cable having one end disposed therein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921773211.3U CN210741682U (en) | 2019-10-21 | 2019-10-21 | Explosion-proof temperature sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921773211.3U CN210741682U (en) | 2019-10-21 | 2019-10-21 | Explosion-proof temperature sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210741682U true CN210741682U (en) | 2020-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921773211.3U Active CN210741682U (en) | 2019-10-21 | 2019-10-21 | Explosion-proof temperature sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210741682U (en) |
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2019
- 2019-10-21 CN CN201921773211.3U patent/CN210741682U/en active Active
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Address after: 313300 Zhongli Machinery Co., Ltd., Xiaquan village, Lingfeng street, Anji County, Huzhou City, Zhejiang Province Patentee after: Zhejiang Zhongli Machinery Co., Ltd Address before: Di Pu Zhen Xia Quan Cun, Anji County, Huzhou City, Zhejiang Province Patentee before: Zhejiang Zhongli Machinery Co.,Ltd. |