A flameproof thermal resistor

Abstract

The utility model is applicable to the technical field of thermal resistors, and provides a flameproof thermal resistor, including an explosion-proof assembly shell, in which a temperature transmitter and a display compatible with the temperature transmitter are arranged; a detection rod assembled on the assembly shell, the detection rod is compatible with the temperature transmitter; a detachable protective cover arranged on the assembly shell for protecting the display; a visual baffle arranged on the protective cover; a flange mounted on the detection rod; and a limiting mechanism arranged on the protective cover for limiting. The flameproof thermal resistor provided by this scheme, through the design of a detachable protective cover, not only effectively isolates the display from the external environment, maintains its clarity and readability, but also facilitates the user to maintain and clean the display.

Description

Technical Field

[0001] The utility model belongs to the technical field of thermal resistors, and in particular relates to a flameproof thermal resistor. Background Art

[0002] With the rapid development of modern industry, the requirements for safe production are getting higher and higher, especially in flammable and explosive environments, which puts forward more stringent standards for the explosion-proof performance of electrical equipment. As a commonly used temperature measuring instrument, explosion-proof thermal resistors play an important role in industrial production.

[0003] The display interface of the explosion-proof thermal resistors currently on the market usually adopts an exposed design and lacks the necessary protective layer or protective shell. This makes the display interface susceptible to external environmental influences during long-term use, such as erosion by dust, oil, moisture, etc., causing the display interface to be blurred, distorted, or even damaged. In addition, due to the lack of protective measures, the display interface is also susceptible to mechanical damage such as impact and scratches, which further accelerates the aging of the equipment. Utility Model Content

[0004] The utility model provides a flameproof thermal resistor, aiming to solve the problem of insufficient display interface protection of flameproof thermal resistors on the current market.

[0005] The utility model is implemented in this way. A flameproof thermal resistor comprises: an explosion-proof assembly shell, in which a temperature transmitter and a display matched with the temperature transmitter are arranged; a detection rod assembled on the assembly shell, the detection rod is matched with the temperature transmitter; a detachable protective cover arranged on the assembly shell for protecting the display; a visual baffle arranged on the protective cover; a flange plate assembled on the detection rod; and a limiting mechanism arranged on the protective cover for limiting.

[0006] Preferably, the limiting mechanism comprises: a pin rod slidably mounted on the protective cover; a spring sleeved on the pin rod; a pull ring fixed on one end of the pin rod; and a fixed limiting block fixed on the other end of the pin rod.

[0007] Preferably, the assembly shell and the protective cover are both assembled with screws, the screws are provided with mounting plates, a rope ring is fixedly mounted on the mounting plate, and an anti-falling connecting rope is fixedly mounted on the rope ring.

[0008] Preferably, a lead-in hole is provided on the assembly shell, a dustproof and waterproof wiring tube is provided in the lead-in hole, and a limiting groove for clamping the limiting block is provided on the assembly shell.

[0009] Preferably, a sealing gasket is provided on the edge of the protective cover, and the flange is made of corrosion-resistant material and is provided with a plurality of assembly holes.

[0010] Preferably, a circuit board is arranged inside the assembly shell, and the temperature transmitter and the display are electrically connected to the circuit board to realize signal transmission and processing, and the circuit board adopts an anti-static design.

[0011] Preferably, the rope ring and the connecting rope are made of flame-retardant material, and the assembly shell and the protective cover are both provided with thread grooves matched with the screws.

[0012] Compared with the related art, the flameproof thermal resistor provided by the utility model has the following beneficial effects:

[0013] The design of the detachable protective cover not only effectively isolates the display from the external environment, maintaining its clarity and readability, but also facilitates the user's maintenance and cleaning of the display; in addition, the addition of a visual baffle further enhances the protection effect and reduces the risk of mechanical damage, while the flange design provides a convenient installation method, allowing the thermal resistor to be quickly fixed to the equipment to be measured. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the main structure of a flameproof thermal resistor provided by the utility model;

[0015] Figure 2 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0016] Figure 3 for Figure 2 An enlarged structural diagram of part A shown in FIG.

[0017] Figure 4 It is a schematic diagram of the assembly structure of the pin rod, the limit block and the pull ring in the utility model.

[0018] Figure numerals: 1. Assembly shell; 2. Temperature transmitter; 3. Detection rod; 4. Display; 5. Protective cover; 6. Baffle; 7. Flange; 8. Pin rod; 9. Spring; 10. Pull ring; 11. Limit block; 12. Screw; 13. Mounting plate; 14. Rope ring; 15. Connecting rope; 16. Lead hole; 17. Wiring tube. DETAILED DESCRIPTION

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0020] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0021] The utility model embodiment provides a flameproof thermal resistor, such as Figure 1-4 As shown, the flameproof thermal resistor comprises: an flameproof assembly shell 1, in which a temperature transmitter 2 and a display 4 matched with the temperature transmitter 2 are arranged; a detection rod 3 assembled on the assembly shell 1, and the detection rod 3 is matched with the temperature transmitter 2; a detachable protective cover 5 arranged on the assembly shell 1 for protecting the display 4; a visual baffle 6 is arranged on the protective cover 5; a flange 7 assembled on the detection rod 3; and a limiting mechanism for limiting is arranged on the protective cover 5.

[0022] It should be noted that the display interface design of the explosion-proof thermal resistors on the market generally tends to be directly exposed to the outside without taking effective protective measures. This design method seems simple and intuitive in the early stage, but it exposes many problems in actual application; first, due to the lack of necessary protective layers or protective shells, the display interface is directly exposed to the external environment. Dust, oil, moisture and other pollutants will inevitably adhere to the display interface. Over a long period of time, these pollutants will not only affect the clarity of the display interface, making the readings blurred and difficult to recognize, but also cause chemical reactions on the display interface, resulting in fading, distortion and other phenomena; this not only affects the normal use of users, but also may pose a potential threat to the accuracy and reliability of the equipment; secondly, the exposed display interface is also susceptible to mechanical damage. At the production site, the equipment is often subjected to external forces such as impact and scratching by various objects. Due to the lack of protective measures, the display interface is easily affected by these external forces, resulting in scratches, breakage and other conditions. This not only affects the appearance of the device, but may also cause the display interface to not work properly, and even require the replacement of the entire thermal resistor; in addition, the display interface exposed to the external environment for a long time will also be affected by environmental factors such as temperature and humidity. Extreme high or low temperature environments may cause the display interface material to age and deform, thus affecting its normal use. A humid environment may cause the internal circuit of the display interface to short-circuit and damage, further accelerating the aging of the device;

[0023] In this embodiment, the explosion-proof assembly shell 1, as the main structure of the entire thermal resistor, not only has a flameproof function, but also provides a safe working environment, so that the internal temperature transmitter 2 and the display 4 can operate stably. This design ensures the safety of the equipment in flammable and explosive environments; secondly, the temperature transmitter 2 and the display 4 adapted thereto are the core components of the thermal resistor. The temperature transmitter 2 is responsible for sensing the temperature changes of the external environment and converting these changes into electrical signals, which are transmitted to the display 4 through the internal circuit system. The display 4 is responsible for displaying these signals in the form of numerical values ​​or images for the user to read; this design allows the user to intuitively understand the temperature conditions of the current environment; a detachable protective cover 5 is introduced; this protective cover 5 can effectively isolate the display 4 from the external environment, prevent dust, oil, moisture and other pollutants from adhering to the display interface, thereby maintaining its clarity and readability. At the same time, the detachable design of the protective cover 5 allows the user to easily maintain and clean the display 4; in addition, a visual baffle 6 is also provided on the protective cover 5. This design further enhances the protective effect without affecting the user's observation of the content of the display 4. The baffle 6 can effectively prevent external objects from directly hitting or scratching the display 4, reducing the risk of mechanical damage; the detection rod 3 is adapted to the temperature transmitter 2, and is responsible for connecting the temperature transmitter 2 with the external environment to realize real-time temperature sensing. The flange 7 assembled on the detection rod 3 provides a convenient installation method, so that the thermal resistor can be quickly fixed on the equipment to be measured; finally, in order to prevent the protective cover 5 from being opened or falling off inadvertently, the present embodiment also provides a limit mechanism on the protective cover 5; this mechanism can effectively lock the position of the protective cover 5 to prevent it from being accidentally opened, thereby ensuring continuous protection of the display 4.

[0024] In a further preferred embodiment of the utility model, the limiting mechanism includes: a pin rod 8 slidably mounted on the protective cover 5; a spring 9 sleeved on the pin rod 8; a pull ring 10 fixed on one end of the pin rod 8; and a fixed limiting block 11 fixed on the other end of the pin rod 8.

[0025] In this embodiment, a limiting mechanism is specially designed to fix and limit the protective cover 5. This mechanism not only ensures the stability of the protective cover 5, but also provides a convenient operation experience for the user; specifically, the pin 8 is one of the core components of the limiting mechanism. It is slidably mounted on the protective cover 5 and can move along a certain trajectory. The moving range of the pin 8 is carefully designed to ensure that it can accurately snap into or out of the corresponding position on the assembly shell 1 when needed; in order to enable the pin 8 to automatically return to its initial position for the next use, the spring 9 is sleeved on the pin 8. The elastic force of the spring 9 enables the pin 8 to always maintain a tendency in a certain direction when not subject to external force, thereby ensuring the self-locking function of the limiting mechanism; in order to facilitate the user to operate the pin 8, the pull ring 10 is fixed to one end of the pin 8. The design of the pull ring 10 allows the user to easily pull or push the pin 8 by hand movements without the use of other tools; the fixed limit block 11 is fixed to the other end of the pin 8. This limit block 11 is designed to match the corresponding structure on the assembly shell 1. When the pin 8 moves to a specific position, the limit block 11 can be inserted into the corresponding notch or hole of the assembly shell 1, thereby fixing the protective cover 5. Through the design of the above-mentioned limit mechanism, the user can easily open or close the protective cover 5, while ensuring that the protective cover 5 can be firmly fixed on the assembly shell 1 when closed, and will not be easily opened by external factors. This design not only enhances the protection performance of the flameproof thermal resistor, but also improves the user experience.

[0026] In a further preferred embodiment of the utility model, the assembly shell 1 and the protective cover 5 are both equipped with screws 12, the screws 12 are provided with mounting plates 13, the mounting plates 13 are fixedly mounted with rope rings 14, and the rope rings 14 are fixedly mounted with anti-drop connection ropes 15.

[0027] In this embodiment, the connection and fixing method between the assembly shell 1 and the protective cover 5 is optimized, and an anti-drop mechanism is specially designed. This improvement not only enhances the stability of the device, but also improves the safety of use; specifically, the screws 12 are assembled on the assembly shell 1 and the protective cover 5, and they play a key connection role. By tightening the screws 12, it can be ensured that the protective cover 5 fits tightly on the assembly shell 1, thereby preventing the external environment from affecting the internal components; in order to further enhance the fixing effect of the screws 12, the mounting plate 13 is arranged on the screws 12; the mounting plate 13 not only increases the contact area between the screws 12 and the assembly shell 1 or the protective cover 5, improves the stability of the connection, but also provides a convenient mounting point; it is based on this characteristic of the mounting plate 13 that the rope ring 14 is fixedly installed on the mounting plate 13, and the design of the rope ring 14 cleverly utilizes the supporting effect of the mounting plate 13, so that it can stably withstand the tension; the connecting rope 15 is fixed above the rope ring 14. The function of this connecting rope 15 is to prevent the protective cover 5 from falling or losing inadvertently. When the user opens the protective cover 5 for inspection or maintenance, the connecting rope 15 can ensure that the protective cover 5 is always connected to the assembly shell 1, and the protective cover 5 will not fall off even if the user accidentally lets go.

[0028] In a further preferred embodiment of the utility model, the assembly shell 1 is provided with a lead-in hole 16 , a dustproof and waterproof wiring tube 17 is provided in the lead-in hole 16 , and the assembly shell 1 is provided with a limiting groove for fixing the limiting block 11 .

[0029] In this embodiment, the lead hole 16 is cleverly arranged on the assembly shell 1. This design not only provides convenience for the wiring of the thermal resistor, but also ensures the neatness and beauty of the wiring. More importantly, the setting of the lead hole 16 makes the connection between the external wire and the internal circuit more direct and efficient, reducing the performance loss or safety hazards caused by improper wiring. In order to further improve the safety and stability of the lead, a dustproof and waterproof wiring tube 17 is introduced and installed in the lead hole 16. This wiring tube 17 has excellent dustproof and waterproof performance, can effectively isolate pollutants such as dust and moisture in the external environment, and protect the internal circuit from damage. At the same time, the wiring tube 17 also has good insulation performance, can prevent short circuit or leakage between wires, and ensure the stable operation of the equipment. In addition, for the use of the limit mechanism, a limit groove specifically used for clamping the limit block 11 is also opened on the assembly shell 1. This design enables the limit block 11 to be accurately clamped into the notch when it moves to a specific position, thereby realizing the stable fixation of the protective cover 5. The setting of the limit groove not only enhances the reliability of the limit mechanism, but also simplifies the user's operation process and improves the use efficiency.

[0030] In a further preferred embodiment of the present invention, a sealing gasket is provided at the edge of the protective cover 5, and the flange 7 is made of corrosion-resistant material and is provided with a plurality of assembly holes.

[0031] In this embodiment, in order to improve the sealing performance between the protective cover 5 and the assembly shell 1, a sealing gasket is specially provided on the edge of the protective cover 5. This design can effectively fill the tiny gap between the protective cover 5 and the assembly shell 1, and prevent external dust, moisture and other pollutants from entering the assembly shell 1, thereby ensuring the safe operation of the display 4 and the internal circuit. At the same time, the use of the sealing gasket can also reduce the friction and looseness between the assembly shell 1 and the protective cover 5 caused by vibration or impact, further improving the stability and reliability of the equipment; secondly, for the material and structural design of the flange 7, this embodiment is made of corrosion-resistant material, and a number of assembly holes are provided thereon. The use of corrosion-resistant materials enables the flange 7 to maintain its performance and appearance for a long time in a harsh industrial environment, and is not easily corroded by factors such as chemicals or high temperature. The design of the assembly holes facilitates the connection and fixation of the flange 7 with other equipment, making the installation and maintenance process of the entire thermal resistor more convenient.

[0032] In a further preferred embodiment of the utility model, a circuit board is arranged inside the assembly shell 1, and the temperature transmitter 2 and the display 4 are electrically connected to the circuit board to realize signal transmission and processing, and the circuit board adopts an anti-static design.

[0033] In this embodiment, the circuit board is the core component of the entire electronic device and is responsible for connecting and controlling various functional modules. In this embodiment, the temperature transmitter 2 and the display 4 are electrically connected to the circuit board, thereby realizing data transmission and interaction. The temperature transmitter 2 converts the sensed temperature signal into an electrical signal and transmits it to the circuit board; after the circuit board processes these signals, it transmits the results to the display 4 for display. This process allows users to understand the changes in ambient temperature in real time.

[0034] In a further preferred embodiment of the utility model, the rope ring 14 and the connecting rope 15 are made of flame-retardant material, and the assembly shell 1 and the protective cover 5 are both provided with thread grooves adapted to the screws 12 .

[0035] In this embodiment, the material of the rope ring 14 and the connecting rope 15 is specially selected from flame-retardant materials; this improvement makes the rope ring 14 and the connecting rope 15 less likely to burn when facing high temperature or fire source, thereby improving the safety of the entire equipment. In the application scenario of flameproof thermal resistors, especially in flammable and explosive industrial environments, the use of flame-retardant materials is particularly important. They can effectively prevent equipment damage and accident risks caused by accidental fire or high temperature; secondly, for the design of the thread groove on the assembly shell 1 and the protective cover 5, the compatibility with the screw 12 is particularly emphasized in this embodiment. This means that the parameters such as the size, shape and depth of the thread groove are carefully designed to ensure that the screw 12 can be tightly and firmly fixed on the assembly shell 1 and the protective cover 5. This design not only simplifies the installation process and improves the installation efficiency, but also enhances the overall stability of the equipment. Through the close fit between the thread groove and the screw 12, the user can easily fix the protective cover 5 on the assembly shell 1 to achieve rapid assembly and disassembly of the equipment.

[0036] In summary, the explosion-proof thermal resistor provided by the present technical solution significantly improves the protection performance and service life of the display interface by introducing key components such as the explosion-proof assembly shell 1, the detachable protective cover 5, the visual baffle 6 and the limiting mechanism; this design not only solves the problem that the display interface of the traditional thermal resistor is exposed, susceptible to contamination and mechanical damage, but also improves the stability and reliability of the equipment, providing a strong guarantee for the safety and stability of industrial production.

[0037] Compared with the related art, the design of the detachable protective cover 5 not only effectively isolates the display 4 from the external environment and maintains its clarity and readability, but also facilitates the user's maintenance and cleaning of the display 4; in addition, by adding a visual baffle 6, the protection effect is further enhanced and the risk of mechanical damage is reduced, and the design of the flange 7 provides a convenient installation method, so that the thermal resistor can be quickly fixed on the equipment to be measured.

[0038] It is worth noting that the circuits, electronic components and modules involved in the present utility model are all prior art and can be fully implemented by those skilled in the art. Needless to say, the content protected by the present utility model does not involve improvements to software and methods.

[0039] In the several embodiments provided in the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are only schematic, such as the division of the above-mentioned units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunication or other forms.

[0040] The above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit the protection scope of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Although the utility model has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the utility model according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the utility model in essence, and these technical solutions also belong to the scope of protection of the utility model.

Claims

1. A flameproof thermal resistor, characterized in that: include: An explosion-proof assembly shell, wherein a temperature transmitter and a display adapted to the temperature transmitter are arranged in the assembly shell; A detection rod mounted on the mounting shell, the detection rod being matched with the temperature transmitter; A detachable protective cover disposed on the assembly shell for protecting the display; A visual baffle is arranged on the protective cover; A flange mounted on the detection rod; A limiting mechanism is arranged on the protective cover for limiting position.

2. The flameproof thermal resistor according to claim 1, characterized in that: The limiting mechanism comprises: A pin rod slidably mounted on the protective cover; A spring sleeved on the pin rod; A pull ring fixed to one end of the pin rod; A clamping type limiting block is fixed on the other end of the pin rod.

3. The flameproof thermal resistor according to claim 1, characterized in that: The assembly shell and the protective cover are both assembled with screws, the screws are provided with mounting plates, a rope ring is fixedly mounted on the mounting plate, and an anti-falling connecting rope is fixedly mounted on the rope ring.

4. The flameproof thermal resistor according to claim 2, characterized in that: The assembly shell is provided with a lead-in hole, a dustproof and waterproof wiring tube is arranged in the lead-in hole, and the assembly shell is provided with a limiting groove for clamping the limiting block.

5. The flameproof thermal resistor according to claim 1, characterized in that: A sealing gasket is arranged on the edge of the protective cover, and the flange is made of corrosion-resistant material and is provided with a plurality of assembly holes.

6. The flameproof thermal resistor according to claim 1, characterized in that: A circuit board is arranged inside the assembly shell, and the temperature transmitter and the display are both electrically connected to the circuit board to realize signal transmission and processing, and the circuit board adopts an anti-static design.

7. The flameproof thermal resistor according to claim 3, characterized in that: The rope ring and the connecting rope are made of flame-retardant material, and the assembly shell and the protective cover are both provided with thread grooves matched with the screws.

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