Shock resistant bimetallic thermometer

Abstract

The utility model discloses a kind of vibration-resistant bimetallic thermometers, including protective tube assembly and temperature measuring component, the protective tube assembly includes protective tube and connecting column, silicon oil is filled in the top inside of protective tube, the top of protective tube is fixedly connected with connecting column, the outer surface of the top of connecting column is installed with protective tube through movable screw, corner spring is provided in the inside of universal support, with good vibration resistance, the silicon oil filling in protective tube can make vibration transmission attenuation, effectively reduce the jitter of pointer, reduce reading deviation, so that product reading is more accurate, and reduce the pointer deformation, wear caused by long time high-frequency vibration environment, thickened universal support further improves the impact resistance and shock resistance of product, thickened universal support can better protect the corner spring between meter head component and protective tube assembly, reduce its risk of deformation due to violent vibration.

Description

Technical Field

[0001] This utility model relates to the field of temperature measurement equipment technology, specifically to a vibration-resistant bimetallic thermometer. Background Technology

[0002] A bimetallic thermometer is a temperature measuring device based on the principle of thermal expansion of a bimetallic strip. Its core is composed of two metal strips with significantly different coefficients of thermal expansion laminated together. When the temperature changes, the bimetallic strip bends and deforms due to the different expansion amounts of the two metals. This deformation is driven by a mechanical transmission mechanism to deflect a pointer, thereby indicating the temperature value on the dial. Due to its advantages such as simple structure, low cost, and no need for an external power supply, this type of thermometer is widely used in temperature monitoring scenarios of industrial equipment such as ship engines, generator sets, petrochemical pipelines, and compressors.

[0003] However, under conditions of violent transportation, frequent mechanical vibration, and drastic temperature changes, the reliability of traditional bimetallic thermometers faces severe challenges. Industrial equipment such as engine sets, bearings, and compressors generally experience high-frequency vibrations (frequency range 50-200Hz, acceleration 5-15g) during operation, which significantly affects the mechanical structural stability of bimetallic thermometers. This often results in deformation of bimetallic elements, pointers, and corner springs, and in severe cases, the connecting parts may also detach, causing the bimetallic thermometer to fail. Utility Model Content

[0004] The purpose of this invention is to provide a vibration-resistant bimetallic thermometer that uses silicone oil filling inside the protective tube to attenuate vibration transmission, effectively reduce pointer jitter, and reduce reading deviation, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a vibration-resistant bimetallic thermometer, comprising a protective tube assembly and a temperature measuring assembly. The protective tube assembly includes a protective tube and a connecting post. The top end of the protective tube is filled with silicone oil, and the top end of the protective tube is fixedly fitted with the connecting post. The outer circumferential surface of the top end of the connecting post is installed with the protective tube by a movable screw. A universal bracket is installed at the top end of the connecting post, and a corner spring is provided on the outside of the universal bracket. The temperature measuring assembly is installed inside the protective tube.

[0006] Preferably, the temperature measuring component includes a fixing block, a bimetallic temperature sensing element, and a first core rod. The first core rod is fixedly sleeved inside the protective tube, and the bottom end of the first core rod is fixedly connected to the fixing block. A groove is formed inside the adjacent ends of the first core rod and the fixing block, and the bimetallic temperature sensing element is fixedly installed in the groove.

[0007] Preferably, it also includes a watch head assembly, which is located above the universal bracket. The watch head assembly includes a watch case and a watch cover. The watch case is installed on the top of the universal bracket. The bottom end of the corner spring is fixedly connected to the first core rod. The top end of the corner spring is fixedly connected to the second core rod. The top end of the second core rod passes through one side of the universal bracket and the through end passes through the bottom of the watch case. The watch cover is installed on the top of the watch case.

[0008] Preferably, the watch head assembly further includes a drawing plate, which is installed in the bottom of the watch case by a number of drawing plate mounting screws. The top of the second mandrel protrudes from the center of the drawing plate, and a pointer is installed at its through end by the drawing plate screw.

[0009] Preferably, the watch case is fitted with safety glass near the cover, and an opening is provided at the bottom of the outer side of the watch case, where a sealing plug is installed.

[0010] Preferably, a U-shaped sealing ring is fitted on the outer wall of the safety glass, and the U-shaped sealing ring is fixedly fitted on the inner side of the top position of the watch case.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. It has good vibration resistance. The silicone oil filling inside the protective tube can attenuate vibration transmission, effectively reduce pointer jitter, reduce reading deviation, make the product reading more accurate, and reduce pointer deformation and wear caused by long-term high-frequency vibration environment, further improving the service life of the product. As a non-Newtonian fluid, silicone oil can effectively absorb mechanical vibration energy due to the shear thickening effect of its molecular chain.

[0013] 2. It has good shock resistance. The thickened universal bracket further improves the product's impact resistance and shock resistance. During transportation, it is difficult to avoid some severe vibration and rough handling. The thickened universal bracket can better protect the corner spring between the meter assembly and the protective tube assembly, reducing the risk of deformation due to severe vibration. Compared with ordinary corner springs, the reinforced corner spring has better impact resistance and shock resistance.

[0014] 3. It has excellent sealing performance. The meter assembly uses a U-shaped sealing ring with better sealing performance. It relies on the elastic deformation of the lip to form a sealing interface. Its design allows the lip to fit tightly with the sealing surface after riveting. Combined with fluid pressure, it enhances the self-sealing effect, reduces water ingress and component corrosion damage, and improves the durability and service life of the equipment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a vibration-resistant bimetallic thermometer according to the present invention;

[0016] Figure 2This is a schematic diagram of the temperature measuring component in this utility model;

[0017] Figure 3 This is a schematic diagram of the protective tube assembly in this utility model;

[0018] Figure 4 This is a structural schematic diagram of the universal bracket in this utility model from the front view.

[0019] Figure 5 This is a side view of the universal bracket in this utility model.

[0020] Figure 6 This is a schematic diagram of the angle spring in this utility model.

[0021] In the diagram: 1. Fixing block; 2. Bimetallic temperature sensing element; 3. First core rod; 4. Protective tube; 5. Connecting post; 6. Movable screw; 7. Universal bracket; 8. Angle spring; 9. Drawing board screw; 10. Drawing board mounting screw; 11. Drawing board; 12. Pointer; 13. Case; 14. Cover; 15. U-shaped sealing ring; 16. Safety glass; 17. Sealing plug; 18. Silicone oil; 19. Second core rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-6 The figure shows a vibration-resistant bimetallic thermometer, including a protective tube assembly and a temperature measuring assembly. The protective tube assembly includes a protective tube 4 and a connecting post 5. The top end of the protective tube 4 is filled with silicone oil 18. The connecting post 5 is fixedly sleeved on the top end of the protective tube 4. The outer circular surface of the top end of the connecting post 5 is installed with the protective tube 4 by a movable screw 6. A universal bracket 7 is installed on the top of the connecting post 5. An angle spring 8 is provided on the inner side of the universal bracket 7. The temperature measuring assembly is installed inside the protective tube 4.

[0024] It is worth noting that when the temperature changes, the bimetallic temperature sensing element 2 will bend and deform due to the different coefficients of thermal expansion of the metal materials on both sides. This bending deformation is transmitted to the first core rod 3 and the second core rod 19 through the connecting structure. The first core rod 3 is connected to the corner spring 8. When the bimetallic temperature sensing element 2 deforms, the second core rod 19 drives the corner spring 8 to rotate accordingly. This rotation is converted into the movement of the pointer 12 on the drawing board 11, thereby indicating the current temperature value. In order to improve the vibration resistance, silicone oil 18 is poured into the top of the protective tube 4. As a non-Newtonian fluid, the shear thickening effect of the molecular chain of silicone oil 18 can effectively absorb mechanical vibration energy, thereby reducing the jitter of the pointer 12, reducing the reading deviation, and making the product reading more accurate. At the same time, the use of silicone oil 18 also reduces the pointer deformation and wear caused by long-term high-frequency vibration environment, further improving the service life of the product.

[0025] Please see Figure 1 The temperature sensing component is located inside the protective tube 4. The temperature sensing component includes a fixing block 1, a bimetallic temperature sensing element 2, and a first core rod 3. The first core rod 3 is fixedly sleeved inside the protective tube 4. The bottom end of the first core rod 3 is fixedly connected to the fixing block 1. A groove is opened inside the adjacent ends of the first core rod 3 and the fixing block 1. The bimetallic temperature sensing element 2 is fixedly installed in the groove. As the core component of temperature sensing, the bimetallic temperature sensing element 2 has a unique design that allows it to produce significant changes when the temperature changes.

[0026] Please see Figure 1 The meter head assembly is located above the universal bracket 7. The meter head assembly includes a meter case 13 and a meter cover 14. The meter case 13 is installed on the top of the universal bracket 7. The bottom end of the angle spring 8 is fixedly connected to the first core rod 3. The top end of the angle spring 8 is fixedly connected to the second core rod 19. The top end of the second core rod 19 passes through one side of the universal bracket 7 and the through end passes through the bottom of the meter case 13. The meter cover 14 is installed on the top of the meter case 13. The meter head assembly also includes a drawing plate 11. The drawing plate 11 is installed in the bottom of the meter case 13 by several drawing plate mounting screws 10. The top end of the second core rod 19 passes through the center of the drawing plate 11, and the through end is installed with a pointer 12 by a drawing plate screw 9. The angle spring 8 is made of reinforced spring steel. This reinforced design significantly improves the structural strength of the angle spring 8 and enhances its vibration resistance. When the thermometer is subjected to external vibration or impact, the reinforced angle spring 8 can more effectively maintain its shape and stability, ensuring the smooth operation of the internal components of the thermometer and the accuracy of the measurement results.

[0027] Please see Figure 1The watch case 13 is fitted with safety glass 16 near the cover 14. A through-hole is provided at the bottom of the outer side of the watch case 13, and a sealing plug 17 is installed at the through-hole. The sealing plug 17 is removed, and silicone oil 18 is added to the bottom inside the watch case 13. The silicone oil 18 will flow into the interior of the protective tube 4. The filling of silicone oil 18 plays a role in lubrication and shock absorption, effectively improving the measurement accuracy and stability of the thermometer in a vibration environment.

[0028] Please see Figure 1 A U-shaped sealing ring 15 is fitted on the outer wall of the safety glass 16. The U-shaped sealing ring 15 is fixedly fitted on the inner side of the top position of the housing 13. The safety glass 16 effectively prevents the pointer 12 from being damaged by accidental collision when rotating at high speed, improving the overall durability of the thermometer. At the same time, users can observe the status of the components behind the safety glass 16 to understand the working status of the thermometer at any time, facilitating timely maintenance and upkeep. The U-shaped sealing ring 15 is made of fluororubber. This material was chosen because fluororubber has excellent oil resistance, solvent resistance, high temperature resistance, and good sealing performance. The U-shaped sealing ring 15 increases the sealing of the safety glass 16, preventing the entry of fine particles and water molecules from the outside, effectively protecting the internal components from contamination and corrosion, and ensuring the thermometer works stably for a long time. In addition, the fluororubber material also has good elasticity, which provides shock-resistant protection for the sides of the safety glass 16.

[0029] Silicone Oil 18 is a high-density methyl silicone oil. This high-density methyl silicone oil has excellent stability and lubricity, and can maintain good performance even under extreme temperature conditions. It can effectively reduce the wear of temperature sensing components in vibration environments, and ensure the measurement accuracy and durability of the thermometer.

[0030] The protective tube 4 is mainly made of 304 stainless steel. This material was chosen because 304 stainless steel has good corrosion resistance and high temperature resistance.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vibration-resistant bimetallic thermometer, comprising a protective tube assembly and a temperature measuring assembly, characterized in that, The protective tube assembly includes a protective tube (4) and a connecting post (5). The inside of the protective tube (4) is filled with silicone oil (18). The top end of the protective tube (4) is fixedly fitted with the connecting post (5). The outer circular surface of the top end of the connecting post (5) is installed with the protective tube (4) by a movable screw (6). A universal bracket (7) is installed on the top of the connecting post (5). An angle spring (8) is provided on the inner side of the universal bracket (7). The temperature measuring component is installed inside the protective tube (4).

2. The vibration-resistant bimetallic thermometer according to claim 1, characterized in that: The temperature measuring component is located inside the protective tube (4). The temperature measuring component includes a fixing block (1), a bimetallic temperature sensing element (2), and a first core rod (3). The first core rod (3) is fixedly sleeved inside the protective tube (4). The bottom end of the first core rod (3) is fixedly connected to the fixing block (1). The adjacent ends of the first core rod (3) and the fixing block (1) are provided with grooves. The bimetallic temperature sensing element (2) is fixedly installed in the groove.

3. The vibration-resistant bimetallic thermometer according to claim 2, characterized in that: It also includes a meter head assembly, which is located above the universal bracket (7). The meter head assembly includes a meter case (13) and a meter cover (14). The meter case (13) is installed on the top of the universal bracket (7). Angle spring (8) is fixedly sleeved on the outside of the top of the first core rod (3). Angle spring (8) is fixedly sleeved on the bottom of the second core rod (19). The top of the second core rod (19) passes through one side of the universal bracket (7), and the through end passes through the bottom of the meter case (13). The meter cover (14) is installed on the top of the meter case (13).

4. The vibration-resistant bimetallic thermometer according to claim 3, characterized in that: The watch head assembly also includes a drawing plate (11), which is installed in the bottom of the watch case (13) by a number of drawing plate mounting screws (10). The top of the second mandrel (19) protrudes from the center of the drawing plate (11), and the pointer (12) is installed at its through end by the drawing plate screw (9).

5. The vibration-resistant bimetallic thermometer according to claim 3, characterized in that: The watch case (13) is fitted with a safety glass (16) near the cover (14), and a passage is provided at the bottom of the outer side of the watch case (13), where a sealing plug (17) is installed.

6. The vibration-resistant bimetallic thermometer according to claim 5, characterized in that: The outer wall of the safety glass (16) is fitted with a U-shaped sealing ring (15), which is fixedly fitted inside the top of the watch case (13).

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