Thermistor with high corrosion resistance

Abstract

The utility model relates to the technical field of thermistors, and discloses a high-corrosion-resistance thermistor which comprises a resistor body, a lead is arranged on the lower surface of the resistor body, a protective shell is arranged on the side wall of the resistor body, a sealing cover is arranged on the lower surface of the resistor body, and a fixing assembly is arranged on the side wall of the sealing cover. A sealing assembly is arranged on the upper surface of the sealing cover, the fixing assembly comprises a fixing block, the side wall of the fixing block is fixedly connected to the side wall of the sealing cover, a clamping sleeve is fixedly connected to the side wall of the protective shell, a first clamping groove is formed in the clamping sleeve, an elastic plate is fixedly connected to the upper surface of the fixing block, and a clamping block is fixedly connected to the side wall of the elastic plate. The sealing assembly comprises a mounting block, and the side wall of the mounting block is fixedly connected to the upper surface of the sealing cover. According to the utility model, the elastic plate slides into the clamping sleeve, so that the clamping block is clamped with the clamping groove I, the fixing effect is achieved, and the practicability of the equipment is improved through the structure.

Description

Technical Field

[0001] The utility model relates to the technical field of thermistors, in particular to a high-corrosion-resistant thermistor. Background Art

[0002] Temperature measurement is crucial in numerous fields, including industrial production, chemical engineering, petroleum, and marine applications. Thermistors are widely used as a common temperature sensor. In these complex and harsh environments, highly corrosion-resistant thermistors have emerged. They must operate stably and long-term in the presence of highly corrosive chemicals (such as strong acids, strong bases, and high-salinity solutions), extreme temperature fluctuations, and humidity. These environments place extremely high demands on thermistors' protective performance, ensuring not only accurate temperature measurement but also corrosion-resistant internal structures to maintain performance stability and service life, ultimately guaranteeing reliable operation of the entire monitoring system.

[0003] In existing technology, highly corrosion-resistant thermistors typically utilize a protective housing and sealing cover to protect the internal thermal element from the corrosive environment. Many designs directly weld the protective housing and sealing cover together. This welding method utilizes the high-temperature melting of the welding material, creating a secure connection between the protective housing and the sealing cover, theoretically achieving a hermetic seal around the thermistor.

[0004] Existing high-corrosion-resistant thermistors use welding to directly weld the protective shell and the sealing cover into one body. As a result, when the internal thermistor needs to be repaired, the welded parts need to be destroyed and cannot be reused. Therefore, a high-corrosion-resistant thermistor is proposed to solve the above problem. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a highly corrosion-resistant thermistor, which aims to improve the problem that the protective shell and the sealing cover are directly welded into one body by welding in the prior art, resulting in the need to destroy the welded parts and making it impossible to reuse the internal thermistor when it is repaired.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A highly corrosion-resistant thermistor, comprising a resistor body, a lead provided on the lower surface of the resistor body, a protective shell provided on the side wall of the resistor body, a sealing cover provided on the lower surface of the resistor body, a fixing assembly provided on the side wall of the sealing cover, and a sealing assembly provided on the upper surface of the sealing cover;

[0008] The fixed assembly comprises a fixed block, the fixed block is fixedly connected to the side wall of the sealing cover, a clamping sleeve is fixedly connected to the side wall of the protective shell, a clamping groove one is formed in the clamping sleeve, an elastic plate is fixedly connected to the upper surface of the fixed block, and a clamping block is fixedly connected to the side wall of the elastic plate.

[0009] As a further description of the above technical solution:

[0010] The sealing assembly comprises a mounting block, the mounting block is fixedly connected to the upper surface of the sealing cover, and a sealing ring is arranged on the side wall of the mounting block.

[0011] As a further description of the above technical solution:

[0012] The side wall of the elastic plate is slidably connected to the inside of the clamping sleeve, and the side wall of the clamping block is slidably connected to the inside of the clamping groove one.

[0013] As a further description of the above technical solution:

[0014] The inside of the protective shell is provided with a clamping groove two, and the side wall of the sealing ring is slidably connected to the inside of the clamping groove two.

[0015] As a further description of the above technical solution:

[0016] The side wall of the sealing ring is slidably connected to the side wall of the lead, and the side wall of the mounting block is slidably connected to the inside of the protective shell.

[0017] As a further description of the above technical solution:

[0018] The side wall of the protective shell is provided with an outer shell layer, and the side wall of the outer shell layer is provided with an intermediate layer.

[0019] As a further description of the above technical solution:

[0020] The side wall of the intermediate layer is provided with a corrosion-resistant layer, and the side wall of the corrosion-resistant layer is provided with an insulating layer.

[0021] As a further description of the above technical solution:

[0022] The side wall of the insulating layer is provided with a corrosion-resistant plating layer.

[0023] The utility model has the advantages of:

[0024] 1、The utility model discloses a fixed block, the fixed block is fixedly connected to the side wall of the sealing cover, a clamping sleeve is fixedly connected to the side wall of the protective shell, a clamping groove one is formed in the clamping sleeve, an elastic plate is fixedly connected to the upper surface of the fixed block, and a clamping block is fixedly connected to the side wall of the elastic plate.

[0025] 2、 The utility model discloses a sealing ring and card slot two cooperation enhance the sealing effect of sealing cover, through the cooperation between protective shell, shell layer, intermediate layer, corrosion -resistant layer, insulating layer, anticorrosive plating layer, improve the corrosion -resistant effect of thermistor. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The utility model discloses a high anticorrosion thermistor's three -dimensional schematic diagram is provided for the utility model;

[0027] Figure 2 The utility model discloses a high anticorrosion thermistor's fixed block's structural schematic diagram is provided for the utility model;

[0028] Figure 3 The utility model discloses a high anticorrosion thermistor's sealing cover's structural schematic diagram is provided for the utility model;

[0029] Figure 4 The utility model discloses a high anticorrosion thermistor's protective shell inside's structural schematic diagram is provided for the utility model.

[0030] LEGEND:

[0031] 1, resistance body;2, lead;3, protective shell;4, sealing cover;5, fixed block;6, elastic plate;7, clamping block;8, clamping sleeve;9, card slot one;10, card slot two;11, mounting block;12, sealing ring;13, shell layer;14, intermediate layer;15, corrosion -resistant layer;16, insulating layer;17, anticorrosive plating. DETAILED DESCRIPTION

[0032] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0033] REFERENCE Figure 1-Figure 2The utility model provides an embodiment of a high corrosion resistance thermistor, comprising a resistor body 1, a lead 2 provided on the lower surface of the resistor body 1, the function of the lead 2 being to connect the resistor body 1 to an external circuit, a protective shell 3 provided on the side wall of the resistor body 1, the protective shell 3 being mainly used to protect the resistor body 1 from corrosion by external corrosive substances. A sealing cover 4 is provided on the lower surface of the resistor body 1, and the sealing cover 4 and the protective shell 3 work together to further enhance the protection of the resistor body 1. A fixing assembly is provided on the side wall of the sealing cover 4, and a sealing assembly is provided on the upper surface of the sealing cover 4, which can prevent external corrosive substances from entering from the connection between the sealing cover 4 and the lower surface of the resistor body 1. The fixing assembly includes a fixing block 5, the side wall of the fixing block 5 is fixedly connected to the side wall of the sealing cover 4, the side wall of the protective shell 3 is fixedly connected to a clamping sleeve 8, a clamping slot 9 is provided inside the clamping sleeve 8, and an elastic plate 6 is fixedly connected to the upper surface of the fixing block 5. The elastic plate 6 has a certain elasticity and can undergo moderate deformation during the installation process, which is convenient for cooperation with the clamping sleeve 8. The side wall of the elastic plate 6 is fixedly connected to the clamping block 7, the side wall of the elastic plate 6 is slidably connected to the inside of the clamping sleeve 8, and the side wall of the clamping block 7 is slidably connected to the inside of the clamping groove 9. This connection method is convenient for installation and disassembly, while ensuring the firmness and sealing of the connection;

[0034] During the operation of the device, when installing the resistor body 1, first place the resistor body 1 inside the protective shell 3. The resistor body 1 is the core temperature measuring element, and its accurate installation position is crucial for subsequent normal operation. Place it close to the inner wall of the protective shell 3. The inner wall of the protective shell 3 can provide stable support for the resistor body 1 to prevent it from being damaged by shaking during the operation of the equipment. At the same time, the protective shell 3 can protect the resistor body 1 from the influence of the external corrosive environment. Then, by fitting the sealing cover 4 to the protective shell 3, the sealing cover 4 works together with the protective shell 3 in this process to form a relatively closed space to protect the resistor body 1. In this process, the elastic plate 6 will slide into the inside of the card sleeve 8 with the card block 7. The elastic plate 6 has good elasticity and can undergo moderate deformation during the installation process. This deformation ability allows the card block 7 to smoothly enter the inside of the card sleeve 8 along with the elastic plate 6. The card block 7 cooperates with the card slot 9 in the card sleeve 8 to achieve the connection between the sealing cover 4 and the protective shell 3. When entering the interior of the ferrule 8, the elastic plate 6 will be deformed. This deformation is to adapt to the space and structure inside the ferrule 8 so that the card block 7 can smoothly reach the position of the card slot 1 9. Until the card block 7 reaches the position of the card slot 1 9, the card block 7 will slide out of the card slot 1 9 due to the elastic extrusion of the elastic plate 6, allowing the elastic plate 6 to recover. Through this elastic restoring force, the card block 7 can be firmly stuck in the card slot 1 9, achieving a fixing effect. This fixing method is not only convenient to operate, but also allows the sealing cover 4 and the protective shell 3 to be easily separated when the resistor body 1 needs to be disassembled for maintenance, without causing damage to either. At the same time, when the sealing cover 4 slides in, the sealing ring 12 will slide into the interior of the card slot 2 10. The sealing ring 12 is a key component to ensure the sealing effect and can fill the tiny gap between the sealing cover 4 and the protective shell 3. By sliding the sealing cover 4 in, the sealing ring 12 is squeezed and deformed. This extrusion deformation enables the sealing ring 12 to better fit the inner wall of the card slot 2 10 and the side wall of the lead 2, thereby improving the sealing effect between the sealing cover 4 and the protective shell 3, effectively preventing external corrosive gases, liquids, etc. from entering the interior of the protective shell 3 through the gap, protecting the resistor body 1 and the lead 2 from corrosion, and ensuring the high corrosion resistance and normal operation of the equipment.

[0035] Reference Figure 3-Figure 4The sealing assembly comprises a mounting block 11 fixedly connected to the upper surface of the sealing cover 4, a sealing ring 12 arranged on the side wall of the mounting block 11, a clamping groove 10 arranged in the inner portion of the protective shell 3, and the side wall of the sealing ring 12 is slidably connected to the inner portion of the clamping groove 10. The cooperation between the clamping groove and the sealing ring 12 can effectively fill the gap between the protective shell 3 and the sealing cover 4, prevent the corrosive liquid, gas and the like from entering the inner portion from here, and thus protect the resistance body 1 and the lead wire 2. The side wall of the sealing ring 12 is slidably connected to the side wall of the lead wire 2, which can further enhance the sealing effect of the connecting portion between the lead wire 2, the sealing cover 4 and the protective shell 3. The side wall of the mounting block 11 is slidably connected to the inner portion of the protective shell 3, the side wall of the protective shell 3 is provided with an outer shell layer 13, the outer shell layer 13 mainly plays a preliminary physical protection role, resists some mechanical impact, dust and the like from the outside, protects the internal structure from being damaged by external physical factors, the side wall of the intermediate layer 14 is provided with a corrosion-resistant layer 15, the corrosion-resistant layer 15 can effectively resist the corrosion of corrosive substances such as acid and alkali, prevent these substances from penetrating into the inner portion of the protective shell 3, and thus protect the resistance body 1 from corrosion and prolong the service life of the high corrosion-resistant thermistor. The side wall of the corrosion-resistant layer 15 is provided with an insulating layer 16, the insulating layer 16 is mainly used for preventing current leakage and ensuring the electrical safety of the high corrosion-resistant thermistor during work, avoiding equipment failure or safety accidents caused by leakage and the like, the side wall of the insulating layer 16 is provided with a corrosion-resistant plating layer 17, the corrosion-resistant plating layer 17 further enhances the corrosion resistance of the protective shell 3, and the corrosion-resistant plating layer 17 can play a role in isolation and protection, and better protect the resistance body 1 in the inner portion of the protective shell 3.

[0036] The protective shell 3 is made of epoxy resin lacquer, which has excellent chemical resistance and can effectively resist corrosion from most corrosive substances such as acids and alkalis, providing a stable protective environment for the internal resistor body 1. It also has a certain degree of hardness and wear resistance, preventing damage to the protective shell 3 from friction and collisions with external objects during use. The outer shell 13 is made of fluororubber, which has excellent resistance to high temperatures, oil, chemicals, and aging. In the high-temperature, oily, and complex chemical environments that high-corrosion-resistant thermistors may face, the outer shell 13 serves as a first line of defense, effectively blocking these adverse factors and preventing them from damaging the internal structure. Furthermore, the high elasticity and flexibility of the fluororubber enable the outer shell 13 to elastically deform when subjected to certain external forces, absorbing and cushioning the impact and reducing damage to internal structures such as the intermediate layer 14. The intermediate layer 14 is made of alumina ceramic, which has high hardness, strength, wear resistance, and excellent high-temperature resistance. This provides additional mechanical support for the protective shell 3 and enhances the stability of the entire protective structure. When the device is subjected to external pressure or impact, the intermediate layer 14 prevents excessive deformation of the protective shell 3 and protects the internal corrosion-resistant layer 15 from damage. Furthermore, the chemical stability of alumina ceramics helps improve the overall corrosion resistance of the protective shell 3, further enhancing the protection of the internal resistor body 1. The corrosion-resistant layer 15 is made of polytetrafluoroethylene (PTFE), which has extremely strong corrosion resistance and effectively prevents corrosive substances such as acids, bases, and organic solvents from penetrating the protective shell 3 and reaching the resistor body 1. Furthermore, the PTFE surface is smooth and resilient to impurities and dirt, which helps keep the interior of the protective shell 3 clean and reduces corrosion problems caused by impurity accumulation. The insulating layer 16 is made of epoxy glass mesh, which has excellent insulating properties and effectively prevents current leakage, ensuring the electrical safety of the highly corrosion-resistant thermistor during operation. This prevents equipment failures or safety incidents caused by leakage and other problems, while also preventing external electric fields from affecting the measurement accuracy of the resistor body 1. Furthermore, the epoxy glass mesh possesses sufficient mechanical strength and heat resistance, ensuring stable insulation performance even in complex operating environments. The anti-corrosion coating 17 is made of nickel, which further enhances the corrosion resistance of the protective shell 3. Nickel has excellent corrosion resistance, especially in environments containing trace amounts of corrosive substances. The nickel coating can provide isolation and protection, preventing these corrosive substances from coming into contact with the base material of the protective shell 3. The nickel coating also enhances the aesthetics of the protective shell 3 and, to a certain extent, increases the surface hardness of the protective shell 3, enhancing its wear resistance.

[0037] Working principle: When using the device, when installing the resistor body 1, first put the resistor body 1 into the protective shell 3 so that it is close to the inner wall of the protective shell 3, and then fit the sealing cover 4 with the protective shell 3. During this process, the elastic plate 6 will slide into the clamping sleeve 8 with the card block 7. When entering the clamping sleeve 8, the elastic plate 6 will be deformed until the card block 7 reaches the position of the card slot 9. At this time, the card block 7 will slide out of the card slot 9 due to the elastic extrusion of the elastic plate 6, so that the elastic plate 6 will recover and achieve a fixing effect. At the same time, when the sealing cover 4 slides in, the sealing ring 12 will slide into the inside of the card slot 2 10. The sliding of the sealing cover 4 causes the sealing ring 12 to be squeezed and deformed, thereby improving the sealing effect between the sealing cover 4 and the protective shell 3. The protective shell 3 is made of epoxy resin paint material, the outer shell layer 13 is made of fluororubber material, the middle layer 14 is made of alumina ceramic material, the corrosion-resistant layer 15 is made of polytetrafluoroethylene material, the insulating layer 16 is made of epoxy glass mesh cloth material, and the anti-corrosion coating 17 is made of nickel-plated material.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A highly corrosion-resistant thermistor, comprising a resistor body (1), characterized in that: The lower surface of the resistor body (1) is provided with a lead (2), the side wall of the resistor body (1) is provided with a protective shell (3), the lower surface of the resistor body (1) is provided with a sealing cover (4), the side wall of the sealing cover (4) is provided with a fixing component, and the upper surface of the sealing cover (4) is provided with a sealing component; The fixing assembly comprises a fixing block (5), the side wall of the fixing block (5) is fixedly connected to the side wall of the sealing cover (4), the side wall of the protective shell (3) is fixedly connected to a clamping sleeve (8), a clamping groove (9) is provided inside the clamping sleeve (8), the upper surface of the fixing block (5) is fixedly connected to an elastic plate (6), and the side wall of the elastic plate (6) is fixedly connected to a clamping block (7).

2. The high corrosion resistance thermistor according to claim 1, characterized in that: The sealing assembly comprises a mounting block (11), a side wall of the mounting block (11) being fixedly connected to the upper surface of the sealing cover (4), and a sealing ring (12) being provided on the side wall of the mounting block (11).

3. The high corrosion resistance thermistor according to claim 1, characterized in that: The side wall of the elastic plate (6) is slidably connected to the inside of the clamping sleeve (8), and the side wall of the clamping block (7) is slidably connected to the inside of the clamping slot (9).

4. The high corrosion resistance thermistor according to claim 2, characterized in that: A second card slot (10) is provided inside the protective shell (3), and the side wall of the sealing ring (12) is slidably connected inside the second card slot (10).

5. The high corrosion resistance thermistor according to claim 2, characterized in that: The side wall of the sealing ring (12) is slidably connected to the side wall of the lead (2), and the side wall of the mounting block (11) is slidably connected to the inside of the protective shell (3).

6. The high corrosion resistance thermistor according to claim 2, characterized in that: The side wall of the protective shell (3) is provided with an outer shell layer (13), and the side wall of the outer shell layer (13) is provided with an intermediate layer (14).

7. The high corrosion resistance thermistor according to claim 6, characterized in that: The side wall of the intermediate layer (14) is provided with a corrosion-resistant layer (15), and the side wall of the corrosion-resistant layer (15) is provided with an insulating layer (16).

8. The high corrosion resistance thermistor according to claim 7, characterized in that: The side wall of the insulating layer (16) is provided with an anti-corrosion coating (17).

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