A shock-resistant resistance temperature detector

Abstract

This utility model relates to the field of resistance temperature detectors (RTDs) technology and discloses a shock-resistant RTD, including a threaded mounting connector with a groove on its inner wall; a sleeve fixedly connected to the outer wall of a protective tube, with a retaining rod fixedly connected to the outer wall of the sleeve, a support mechanism at the top of the retaining rod, and a limiting ring fixedly connected to the bottom of the sleeve; a silicone sleeve fixedly connected to the inner wall of the retaining rod, with a silicone ring fixedly connected to the outer wall of the limiting ring; and a support mechanism including a support rod, one end of which is fixedly connected to the top of the retaining rod, and the other end of which is fixedly connected to a support plate, which has an arc-shaped plate structure. In this utility model, by fixing the protective tube to the interface of a pipeline or tank through the mounting mechanism, the vibration transmission path of the pipeline or tank can be isolated, thus protecting the RTD from vibration during use and laying a stable foundation for accurate temperature measurement by the RTD.

Description

Technical Field

[0001] This utility model relates to the field of resistance temperature detector (RTD) technology, and in particular to a shock-resistant RTD. Background Technology

[0002] Resistance temperature detectors (RTDs) are core temperature measuring elements used in industry. They typically consist of a sensing element, internal leads, insulating filler material, and an external protective tube. They are characterized by high measurement accuracy, good stability, and a wide temperature range. They are often installed on equipment such as pipes and tanks to monitor the temperature of fluids or materials in real time.

[0003] Currently, the installation method of RTDs on pipelines or tanks mostly relies on their own fixing nuts to firmly fix the RTD's protective tube to the equipment interface, so as to ensure that its temperature measuring end can penetrate into the specified position in the medium and maintain the stability and reliable sealing of the mechanical connection during long-term testing, avoiding loosening or falling off.

[0004] However, this rigid connection achieved through a fixing nut also has significant drawbacks. When the pipeline or tank vibrates due to fluid fluctuations, mechanical operation, or other factors, these vibrations are directly transmitted to the protective tube and internal structure of the resistance temperature detector (RTD) without any buffering, causing resonance in the RTD. This prolonged mechanical resonance can easily lead to fatigue damage, breakage, or performance degradation of the fragile internal temperature sensing element, leads, and solder joints, ultimately resulting in inaccurate temperature measurement. Therefore, a vibration-resistant RTD is proposed to address these issues. Utility Model Content

[0005] This invention provides a shock-resistant resistance temperature detector (RTD) that aims to improve the problem mentioned in the prior art where "the method of fixing the RTD results in poor shock resistance".

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a shock-resistant thermal resistor, comprising a junction box and a protective tube fixedly connected to the bottom end of the junction box, wherein the outer wall of the protective tube is provided with a mounting mechanism, the mounting mechanism comprising:

[0007] A threaded mounting connector, wherein the inner wall of the threaded mounting connector is provided with a groove;

[0008] A sleeve is fixedly connected to the outer wall of a protective tube. A locking rod is fixedly connected to the outer wall of the sleeve. A support mechanism is provided at the top of the locking rod. A limit ring is fixedly connected to the bottom of the sleeve.

[0009] A silicone sleeve is fixedly connected to the inner wall of the lever, and a silicone ring is fixedly connected to the outer wall of the limiting ring.

[0010] As a further description of the above technical solution:

[0011] The support mechanism includes a support rod, one end of which is fixedly connected to the top of the lever, and the other end of which is fixedly connected to a support plate.

[0012] As a further description of the above technical solution:

[0013] The support plate has an arc-shaped plate structure, and the inner arc surface of the support plate is attached to the outer wall of the junction box.

[0014] As a further description of the above technical solution:

[0015] The outer wall of the threaded mounting connector is fitted with a sealing ring.

[0016] As a further description of the above technical solution:

[0017] The lever has an L-shaped rod structure, and the silicone sleeve on the outer wall of the lever fits tightly against the inner wall of the slot.

[0018] As a further description of the above technical solution:

[0019] The outer diameter of the limiting ring is larger than the outer diameter of the sleeve, and the silicone ring on the outer wall of the limiting ring is tightly fitted to the inner wall of the threaded mounting connector.

[0020] As a further description of the above technical solution:

[0021] The threaded mounting connector is specifically a hexagonal nut, and the outer diameter of the sleeve is smaller than the inner diameter of the threaded mounting connector.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the protective tube is fixed at the interface of the pipeline or tank by the installation mechanism, which can isolate the vibration transmission path of the pipeline or tank. In this way, the thermal resistor is not affected by vibration during use, laying a stable foundation for the accurate temperature measurement of the thermal resistor.

[0024] 2. In this utility model, the axial positioning of the junction box can be limited by the design of the support mechanism, so that the junction box can be effectively fixed when the thermal resistor is in use, avoiding the thermal resistor from wobbling due to being top-heavy. This further ensures the stability of the thermal resistor during use. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the overall structure of the installation mechanism and support mechanism of this utility model;

[0027] Figure 3 This utility model Figure 2 A schematic diagram of the exploded structure;

[0028] Figure 4 This utility model Figure 2 A partial cross-sectional structural diagram.

[0029] Legend:

[0030] 1. Junction box; 2. Protective tube; 3. Mounting mechanism; 31. Threaded mounting connector; 32. Sleeve; 33. Silicone sleeve; 34. Slot; 35. Locking rod; 36. Limiting ring; 37. Silicone ring; 4. Support mechanism; 41. Support rod; 42. Support plate; 5. Sealing ring. Detailed Implementation

[0031] 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.

[0032] Reference Figure 1 - Figure 3 One embodiment of this utility model is a shock-resistant thermal resistor, which includes a junction box 1 and a protective tube 2 fixedly connected to the bottom of the junction box 1. The outer wall of the protective tube 2 is provided with an installation mechanism 3, which can fix the protective tube 2 to the interface of a pipeline or tank.

[0033] Reference Figure 2 - Figure 4The installation mechanism 3 includes a threaded mounting connector 31. In use, the threaded mounting connector 31 is threadedly connected to the interface of a pipe or tank. The inner wall of the threaded mounting connector 31 has a groove 34. A clamping rod 35 drives a silicone sleeve 33 to press against the inside of the groove 34, radially limiting the threaded mounting connector 31 and preventing it from rotating on the outer wall of the sleeve 32. A sealing ring 5 is clamped to the outer wall of the threaded mounting connector 31, sealing the connection between the threaded mounting connector 31 and the pipe or tank. The sleeve 32 is fixedly connected to the outer wall of the protective pipe 2. A locking rod 35 is fixedly connected to the outer wall of the sleeve 32. A support mechanism 4 is provided at the top of the locking rod 35. A limiting ring 36 is fixedly connected to the bottom of the sleeve 32. The threaded mounting connector 31 can be axially limited to the outer wall of the sleeve 32 by the cooperation of the locking rod 35 and the limiting ring 36. A silicone sleeve 33 is fixedly connected to the inner wall of the locking rod 35. A silicone ring 37 is fixedly connected to the outer wall of the limiting ring 36. The silicone ring 37 can separate the outer wall of the limiting ring 36 from the inner wall of the threaded mounting connector 31, thereby blocking the vibration transmission path between the threaded mounting connector 31 and the limiting ring 36.

[0034] Reference Figure 3 - Figure 4 The locking rod 35 has an L-shaped rod structure. The L-shaped locking rod 35 drives the silicone sleeve 33 to press against the top of the threaded mounting connector 31, which can limit the top of the threaded mounting connector 31, so that the threaded mounting connector 31 cannot move upward on the outer wall of the sleeve 32. The silicone sleeve 33 on the outer wall of the locking rod 35 fits tightly with the inner wall of the locking groove 34. By wrapping the locking rod 35 with the silicone sleeve 33, the vibration transmission path between the threaded mounting connector 31 and the locking rod 35 can be blocked.

[0035] Reference Figure 4 The outer diameter of the limiting ring 36 is larger than the outer diameter of the sleeve 32. The silicone ring 37 on the outer wall of the limiting ring 36 is tightly fitted with the inner wall of the threaded mounting connector 31. The diameter of the limiting ring 36 is larger than the diameter of the sleeve 32. The limiting ring 36 can drive the silicone ring 37 to press against the inner wall of the threaded mounting connector 31, so that the threaded mounting connector 31 cannot move downward on the outer wall of the sleeve 32.

[0036] Reference Figure 2 - Figure 4 The threaded mounting connector 31 is specifically a hexagonal nut. The outer diameter of the sleeve 32 is smaller than the inner diameter of the threaded mounting connector 31. Therefore, the outer wall of the sleeve 32 and the inner wall of the threaded mounting connector 31 are in a non-contact state.

[0037] Reference Figure 1 - Figure 3The support mechanism 4 includes a support rod 41. One end of the support rod 41 is fixedly connected to the top of the clamping rod 35, and the other end of the support rod 41 is fixedly connected to a support plate 42. The support plate 42 is an arc-shaped plate structure. The inner arc surface of the support plate 42 is attached to the outer wall of the junction box 1. The bottom of the junction box 1 can be supported by the support rod 41 and the support plate 42. The thermal resistor is prone to top-heavy operation due to its long length, which can cause it to sway. This situation can be avoided by the support of the support rod 41 and the support plate 42.

[0038] Working principle: The diameter of the limiting ring 36 is larger than that of the sleeve 32. The limiting ring 36 can drive the silicone ring 37 to press against the inner wall of the threaded mounting connector 31, so that the threaded mounting connector 31 cannot move downward on the outer wall of the sleeve 32. At the same time, the L-shaped locking rod 35 drives the silicone sleeve 33 to press against the top of the threaded mounting connector 31, which can limit the top of the threaded mounting connector 31, so that the threaded mounting connector 31 cannot move upward on the outer wall of the sleeve 32. In this way, the threaded mounting connector 31 is axially limited. At the same time, the locking rod 35 drives the silicone sleeve 33 to press against the inside of the locking groove 34, which can radially limit the threaded mounting connector 31, so that it cannot rotate on the outer wall of the sleeve 32. In this way, the threaded mounting connector 31 and the sleeve 32 can be completely fixed together.

[0039] In use, the threaded mounting connector 31 is threadedly connected to the interface of the pipe or tank. The sealing ring 5 can be used to seal the connection between the threaded mounting connector 31 and the pipe or tank, thus completing the installation of the thermal resistor.

[0040] During temperature measurement, the silicone ring 37 separates the outer wall of the limiting ring 36 from the inner wall of the threaded mounting connector 31, thereby blocking the vibration transmission path between the threaded mounting connector 31 and the limiting ring 36 and preventing the vibration of the pipeline or tank from being transmitted to the limiting ring 36 through the threaded mounting connector 31. The silicone sleeve 33 wraps around the clamping rod 35, separating the clamping rod 35 from the threaded mounting connector 31 and the clamping groove 34, thereby blocking the vibration transmission path between the threaded mounting connector 31 and the clamping rod 35 and preventing the mechanical vibration of the pipeline or tank from being transmitted to the clamping rod 35 through the threaded mounting connector 31. This prevents the sleeve 32 from being interfered with by mechanical vibration, thus protecting the thermal resistor from vibration during use.

[0041] When the thermal resistor is in use, the bottom of the junction box 1 can be supported by the support rod 41 and the support plate 42, which can limit the radial movement of the junction box 1 and prevent the top of the thermal resistor from becoming unstable due to its long length, thus ensuring the stability of the thermal resistor during use.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A shock-resistant resistance temperature detector (RTD), comprising a junction box (1) and a protective tube (2) fixedly connected to the bottom end of the junction box (1), characterized in that: The outer wall of the protective tube (2) is provided with an installation mechanism (3), the installation mechanism (3) includes: A threaded mounting connector (31) has a groove (34) on its inner wall. Sleeve (32), the sleeve (32) is fixedly connected to the outer wall of the protective tube (2), the outer wall of the sleeve (32) is fixedly connected to a clamping rod (35), the top end of the clamping rod (35) is provided with a support mechanism (4), and the bottom end of the sleeve (32) is fixedly connected to a limit ring (36). A silicone sleeve (33) is fixedly connected to the inner wall of the lever (35), and a silicone ring (37) is fixedly connected to the outer wall of the limiting ring (36).

2. The shock-resistant resistance temperature detector according to claim 1, characterized in that: The support mechanism (4) includes a support rod (41), one end of which is fixedly connected to the top of the lever (35), and the other end of which is fixedly connected to a support plate (42).

3. The shock-resistant resistance temperature detector according to claim 2, characterized in that: The support plate (42) is an arc-shaped plate structure, and the inner arc surface of the support plate (42) is attached to the outer wall of the junction box (1).

4. The shock-resistant resistance temperature detector according to claim 1, characterized in that: The outer wall of the threaded mounting connector (31) is fitted with a sealing ring (5).

5. The shock-resistant resistance temperature detector according to claim 1, characterized in that: The lever (35) is an L-shaped lever structure, and the silicone sleeve (33) on the outer wall of the lever (35) is tightly fitted to the inner wall of the slot (34).

6. The shock-resistant resistance temperature detector according to claim 1, characterized in that: The outer diameter of the limiting ring (36) is larger than the outer diameter of the sleeve (32), and the silicone ring (37) on the outer wall of the limiting ring (36) is in close contact with the inner wall of the threaded mounting connector (31).

7. The shock-resistant resistance temperature detector according to claim 1, characterized in that: The threaded mounting connector (31) is specifically a hexagonal nut, and the outer diameter of the sleeve (32) is smaller than the inner diameter of the threaded mounting connector (31).

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