Multi-point multi-branch armored thermocouple

Abstract

This utility model discloses a multi-point, multi-support armored thermocouple, comprising an armored thermocouple body, with several probes fixedly connected to the bottom of the body. A sleeve is fixedly connected to the outer wall of each probe near its top, and a flange is fixedly connected to the outer wall of the sleeve. A protective shell is provided at the bottom of the flange. A first step and a second step are provided on the outer wall of the sleeve near its bottom. A first platform and a second platform are fixedly connected sequentially from top to bottom to the inner wall of the protective shell. This utility model, through the cooperation of the sleeve, spring washer, and protective shell, employs a stepped diameter and elastic washer support design for the armored thermocouple. By setting multiple elastic support points along the probe length, it combines the stability of rigid support with the adaptability of flexible probes, making it particularly suitable for applications with long probes, high vibration, and large temperature differences. This significantly improves measurement accuracy, reliability, and service life.

Description

Technical Field

[0001] This utility model relates to the field of thermocouple technology, specifically to a multi-point, multi-branch armored thermocouple. Background Technology

[0002] Armored thermocouples are a type of thermocouple with a special structure and superior performance, developed from ordinary thermocouples. Due to their excellent performance, armored thermocouples are widely used in various applications requiring reliable, rapid, and durable temperature measurement, especially in harsh environments or where installation is limited.

[0003] Currently, most traditional armored thermocouples use threads or flanges for connection. Under conditions such as long probes, large pipe diameters, high flow rates, strong vibrations, or significant thermal expansion, the enormous stress generated between the thermocouple probe and the sheath can easily cause the probe to bend or break, affecting not only stability but also measurement accuracy.

[0004] Therefore, we propose to design a multi-point, multi-branch armored thermocouple. Utility Model Content

[0005] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0006] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution: A multi-point, multi-branch armored thermocouple includes an armored thermocouple body, a plurality of probes fixedly connected to the bottom of the armored thermocouple body, a sleeve fixedly connected to the outer wall of the plurality of probes near the top, a flange fixedly connected to the outer wall of the sleeve, a pipe mounting flange provided at the bottom of the flange, and a protective shell fixedly connected to the bottom of the pipe mounting flange. The outer wall of the sleeve near the bottom is provided with a first step and a second step. The inner wall of the protective shell is fixedly connected with a first platform and a second platform from top to bottom. A first spring washer is provided between the bottom of the first step and the first platform, and a second spring washer is provided between the bottom of the second step and the second platform.

[0007] In a preferred embodiment of the multi-point, multi-branch armored thermocouple described in this utility model, both the first spring washer and the second spring washer are arranged in a "C"-shaped open ring, which provides radial multi-point support between the platform and the step, thus facilitating the limitation of the lateral vibration of the probe.

[0008] In a preferred embodiment of the multi-point, multi-branch armored thermocouple described in this utility model, a gap is provided between the inner sidewalls of the first and second steps and the outer sidewall of the sleeve, and the inner sidewalls of the first and second spring washers are tightly fitted to the outer sidewall of the sleeve to ensure sealing and reduce the gap between the sleeve and the platform where the medium enters.

[0009] As a preferred embodiment of the multi-point, multi-branch armored thermocouple described in this utility model, annular grooves are provided on the top of both the first platform and the second platform. The two annular grooves respectively correspond to and fit with the bottom of the first spring washer and the second spring washer. If necessary, the spring washer can be fixed in the annular groove by welding or other means to facilitate the positioning of the first spring washer and the second spring washer.

[0010] In a preferred embodiment of the multi-point, multi-branch armored thermocouple described in this utility model, the first spring washer and the second spring washer are both made of Hastelloy alloy, which is elastic and can adapt to slight changes in tube diameter when the sheath undergoes thermal expansion.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This invention utilizes a sheath, spring washer, and protective shell in a coordinated manner, employing a stepped diameter and elastic washer-supported armored thermocouple design. By setting multiple elastic support points along the probe length, it combines the stability of rigid support with the adaptability of a flexible probe, making it particularly suitable for applications with long probes, high vibration, and large temperature differences. This significantly improves measurement accuracy, reliability, and service life. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a schematic diagram of the appearance of a multi-point, multi-branch armored thermocouple according to the present invention; Figure 2 This is a schematic diagram of the installation of a multi-point, multi-branch armored thermocouple according to the present invention. Figure 3 for Figure 2 A schematic diagram of the structure at point A in the middle.

[0013] Legend: 1. Armored thermocouple body; 2. Probe; 3. Sheath; 301. First step; 302. Second step; 4. Flange; 5. Protective shell; 501. First platform; 502. Second platform; 6. First spring washer; 7. Second spring washer. Detailed Implementation

[0014] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0015] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0017] Please see Figure 1-3 This utility model provides a multi-point, multi-branch armored thermocouple, including an armored thermocouple body 1, a plurality of probes 2 fixedly connected to the bottom of the armored thermocouple body 1, a sleeve 3 fixedly connected to the outer wall of the plurality of probes 2 near the top, a flange 4 fixedly connected to the outer wall of the sleeve 3, a pipe mounting flange provided at the bottom of the flange 4, and a protective shell 5 fixedly connected to the bottom of the pipe mounting flange.

[0018] The outer wall of the sleeve 3 near the bottom is provided with a first step 301 and a second step 302. The inner wall of the protective shell 5 is fixedly connected with a first platform 501 and a second platform 502 from top to bottom. A first spring washer 6 is provided between the bottom of the first step 301 and the first platform 501, and a second spring washer 7 is provided between the bottom of the second step 302 and the second platform 502.

[0019] The inner walls of the first step 301 and the second step 302 are provided with gaps between them and the outer walls of the sleeve 3 to accommodate the thermal expansion of the sleeve 3. The inner walls of the first spring washer 6 and the second spring washer 7 are tightly fitted to the outer walls of the sleeve 3 to ensure sealing and reduce the gap between the sleeve 3 and the platform from the medium entering the sleeve 3.

[0020] In this embodiment, both the first spring washer 6 and the second spring washer 7 are arranged in a "C"-shaped open ring, which provides radial multi-point support between the platform and the step, making it easier to limit the lateral vibration of the probe 2.

[0021] The top of both the first platform 501 and the second platform 502 is provided with annular grooves. The two annular grooves are respectively matched with the bottom of the first spring washer 6 and the second spring washer 7. If necessary, the spring washers can be fixed in the annular grooves by welding or other means to facilitate the positioning of the first spring washer 6 and the second spring washer 7.

[0022] In this embodiment, both the first spring washer 6 and the second spring washer 7 are made of Hastelloy alloy, which is elastic and can adapt to slight changes in pipe diameter when the sleeve 3 undergoes thermal expansion.

[0023] In use, the pipe mounting flange is pre-installed on the thick-walled pipe on which the thermocouple is to be installed. The protective shell 5 is located inside the pipe. The protective shell 5 is provided with a first platform 501 and a second platform 502. The top of the two platforms is respectively provided with a first spring washer 6 and a second spring washer 7.

[0024] During installation, the armored thermocouple body 1 is inserted into the center of the pipe mounting flange, and the flange 4 is fixed to the pipe mounting flange with bolts. At this time, the first step 301 and the second step 302 opened on the outside of the sleeve 3 abut against the top of the first spring washer 6 and the second spring washer 7, respectively.

[0025] Under conditions of long probe, large pipe diameter, high flow rate, strong vibration or significant thermal expansion, the probe rod 2 and the sleeve 3 are allowed to extend and retract freely in the axial direction. By compressing and stretching the spring washer, the pressure on the spring washer is buffered, thereby avoiding the huge stress caused by thermal expansion, which could lead to bending or breakage of the probe rod 2.

[0026] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A multi-point, multi-branch armored thermocouple, comprising an armored thermocouple body (1), characterized in that, The armored thermocouple body (1) has several probes (2) fixedly connected to its bottom. The outer walls of the probes (2) near the top are fixedly connected to sleeves (3). The outer walls of the sleeves (3) are fixedly connected to flanges (4). The bottom of the flanges (4) is provided with pipe mounting flanges. The bottom of the pipe mounting flanges is fixedly connected to protective shells (5). The outer wall of the sleeve (3) near the bottom is provided with a first step (301) and a second step (302). The inner wall of the protective shell (5) is fixedly connected with a first platform (501) and a second platform (502) from top to bottom. A first spring washer (6) is provided between the bottom of the first step (301) and the first platform (501). A second spring washer (7) is provided between the bottom of the second step (302) and the second platform (502).

2. A multi-point, multi-branch armored thermocouple according to claim 1, characterized in that, The first spring washer (6) and the second spring washer (7) are both arranged in a "C"-shaped open ring.

3. A multi-point, multi-branch armored thermocouple according to claim 1, characterized in that, There is a gap between the inner wall of the first step (301) and the second step (302) and the outer wall of the sleeve (3), and the inner walls of the first spring washer (6) and the second spring washer (7) are tightly fitted to the outer wall of the sleeve (3).

4. A multi-point, multi-branch armored thermocouple according to claim 1, characterized in that, The top of the first platform (501) and the second platform (502) are provided with annular grooves, and the two annular grooves are respectively matched with the bottom of the first spring washer (6) and the second spring washer (7).

5. A multi-point, multi-branch armored thermocouple according to claim 1, characterized in that, The first spring washer (6) and the second spring washer (7) are both made of Hastelloy alloy.

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