Rapid temperature measuring thermocouple

Abstract

The utility model discloses a rapid temperature measuring thermocouple, which belongs to the technical field of thermocouples and comprises a thermocouple body, and the bottom of the thermocouple body is fixedly connected with an insulating tube. The protective tube is connected to the outer surface of the insulating tube in a sleeving mode, and a threaded protrusion is integrally formed on the top of the protective tube; the thermocouple further comprises a protective top cover used for protecting the top of the thermocouple body, and the bottom of the protective top cover is provided with a threaded installation hole used in cooperation with the threaded protrusion. By arranging the protective tube and the protective top cover, the thermocouple is simple in structure, convenient and practical, the thermocouple body can be well protected, the thermocouple body is prevented from being exposed in a high-temperature and high-humidity environment for a long time, meanwhile, the thermocouple body is prevented from being in direct contact with a corrosive object, aging of the thermocouple body is delayed, and the service life of the thermocouple body is prolonged. Meanwhile, the influence of the environment on the thermocouple body is reduced, thereby prolonging the service life of the thermocouple body and reducing the use cost.

Description

Technical Field

[0001] The utility model relates to the technical field of thermocouples, in particular to a rapid temperature measurement thermocouple. Background Art

[0002] Thermocouples are commonly used temperature measuring elements in temperature measuring instruments. They directly measure temperature and convert temperature signals into thermoelectric potential signals, which are then converted into the temperature of the measured medium through electrical instruments (secondary instruments). The appearance of various thermocouples is often very different due to needs, but their basic structure is roughly the same. They are usually composed of main parts such as thermocouples, insulating sleeve protection tubes and junction boxes. They are usually used in conjunction with display instruments, recording instruments and electronic regulators. Thermocouples have the advantages of simple structure, high accuracy, good stability and wide temperature measurement range. They are widely used in industrial automation, aerospace, scientific research and other fields. Its working principle is based on the thermoelectric effect, that is, when two different metals are connected together to form a loop, if the temperatures of the two connection points are different, current will be generated in the loop.

[0003] After searching, in the prior art, Chinese patent publication number: CN219474815U discloses a thermoelectric, the utility model: includes a junction box; a connecting pipe assembly, one end of the connecting pipe assembly is connected to the junction box, the connecting pipe assembly includes an insulating tube, a metal protection tube and a first non-metallic protection tube arranged in sequence from the inside to the outside along its radial direction; a sensor for temperature measurement, arranged in the end of the insulating tube away from the junction box. This solution arranges the first non-metallic protection tube in the outer layer and the metal protection tube in the inner layer, which can solve the problem of poor strength or poor corrosion resistance of the thermocouple protection tube during use.

[0004] But this device still has the following defects:

[0005] Thermocouples are often used in environments with high temperature and humidity, and may also be corroded by corrosive substances. This device and the prior art only protect the insulating tube portion of the thermocouple, while the top of the thermocouple is exposed and prone to aging and corrosion, which shortens the service life of the thermocouple and increases the cost of use. This device does not solve this problem. Utility Model Content

[0006] The purpose of the utility model is to provide a rapid temperature measurement thermocouple. By arranging a protective tube and a protective top cover, the thermocouple body can be well protected to avoid long-term exposure of the thermocouple body to a high temperature and high humidity environment. At the same time, it also avoids the thermocouple body from direct contact with corrosive objects, which can delay the aging of the thermocouple body and reduce the influence of the environment on the thermocouple body, thereby extending the service life of the thermocouple body and reducing the cost of use, so as to solve the problems raised in the above-mentioned background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A rapid temperature measurement thermocouple comprises a thermocouple body, the bottom of which is fixedly connected with an insulating tube;

[0009] It also includes a protection tube, which is sleeved on the outer surface of the insulating tube, and the top of the protection tube is integrally formed with a threaded protrusion, and the top surface of the protection tube is bonded with a first sealing rubber ring by glue;

[0010] It also includes a protective top cover for protecting the top of the thermocouple body, wherein a threaded mounting hole for use with the threaded protrusion is provided at the bottom of the protective top cover, a fixing ring for fixing the thermocouple body is provided above the threaded mounting hole, the fixing ring is fixedly connected to the inner wall of the protective top cover, and a connecting hole for the thermocouple body connecting socket to pass through is provided above the fixing ring.

[0011] Preferably, a limiting ring is provided at the top of the threaded mounting hole, and the limiting ring is integrally formed with the protective top cover.

[0012] Preferably, the protective top cover comprises two groups of symmetrically arranged protective shells, and mounting plates are integrally formed around the surfaces of the protective shells.

[0013] Preferably, bolts are threadedly connected on the mounting plate, and the two groups of protective shells are fixedly connected to the mounting plate through the bolts.

[0014] Preferably, a sealing strip is provided at the contacting portion of the two groups of protective shells, and the sealing strip is bonded to the protective shell on one side by glue.

[0015] Preferably, a flange is fixedly mounted on the outer surface of the protection tube, a connecting hole is opened on the flange, and a second sealing rubber ring is bonded to the bottom of the flange by glue.

[0016] Preferably, a measuring end is provided at the bottom of the protection tube, and the measuring end is fixedly connected to the insulating tube.

[0017] Preferably, two groups of thermodes made of different materials are welded to the top of the measuring end, and the thermodes are arranged inside the insulation.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] The utility model has a simple structure, is convenient and practical, and can well protect the thermocouple body by arranging the protection tube and the protection top cover, avoids the thermocouple body from being exposed to the high temperature and high humidity environment for a long time, and also avoids the thermocouple body from directly contacting the corrosive objects, delays the aging of the thermocouple body, and reduces the influence of the environment on the thermocouple body, thereby prolonging the service life of the thermocouple body and reducing the use cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the cross-sectional structure of the protection pipe;

[0022] Figure 3 This is a schematic diagram of the protection tube structure;

[0023] Figure 4 It is a schematic diagram of the protective top cover structure;

[0024] Figure 5 It is a schematic diagram of the partial cross-sectional structure of the thermocouple body.

[0025] In the figure: 1. thermocouple body; 101. insulating tube; 102. measuring end; 103. thermoelectrode; 2. protective tube; 201. threaded protrusion; 202. first sealing rubber ring; 3. protective top cover; 301. threaded mounting hole; 302. fixing ring; 303. connecting through hole; 304. limiting ring; 305. protective shell; 306. mounting plate; 307. bolt; 308. sealing rubber strip; 4. flange; 5. connecting hole; 6. second sealing rubber ring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figures 1 to 5 , the utility model provides a technical solution:

[0028] A rapid temperature measurement thermocouple comprises a thermocouple body 1, the bottom of the thermocouple body 1 is fixedly connected with an insulating tube 101, a measuring end 102 is fixedly connected with the insulating tube 101, two groups of thermoelectrodes 103 made of different materials are welded to the top of the measuring end 102, and the thermoelectrodes 103 are arranged inside the insulation; by arranging the measuring end 102 on the outside of the bottom of the insulating tube 101, it can directly contact with the object to be measured, thereby improving the accuracy of the measurement.

[0029] It also includes a protective tube 2, a measuring end 102 is provided at the bottom of the protective tube 2. By providing the protective tube 2, the insulating tube 101 can be protected, thereby improving the service life of the thermocouple body 1. The protective tube 2 is sleeved on the outer surface of the insulating tube 101, and a threaded protrusion 201 is integrally formed on the top of the protective tube 2. The threaded protrusion 201 is convenient for connection and fixation with the protective top cover 3; a first sealing rubber ring 202 is bonded to the top surface of the protective tube 2 by glue, and the first sealing rubber ring 202 is provided to achieve a sealed connection between the protective tube 2 and the protective top cover 3, further reducing the influence of the external environment on the thermocouple body 1, thereby extending the service life; a flange 4 is fixedly installed on the outer surface of the protective tube 2, and a connecting hole 5 is opened on the flange 4. A second sealing rubber ring 6 is bonded to the bottom of the flange 4 by glue, and the flange 4 is convenient for connection and fixation with an external measuring pipeline, and is used in conjunction with the second sealing rubber ring 6 to increase the sealing of the connection.

[0030] The thermocouple body 1 is also provided with a protective top cover 3 for protecting the top of the thermocouple body 1. The bottom of the protective top cover 3 is provided with a threaded mounting hole 301 used in conjunction with the threaded protrusion 201. By providing the protective top cover 3, the top of the thermocouple body 1 can be protected, and the protective tube 2 is connected through the threaded mounting hole 301, so that the thermocouple body 1 can be protected as a whole, which greatly improves the service life of the thermocouple body 1; a fixing ring 302 for fixing the thermocouple body 1 is provided above the threaded mounting hole 301, and the fixing ring 302 is fixedly connected to the inner wall of the protective top cover 3, and a connecting through hole 303 for the thermocouple body 1 to pass through is provided above the fixing ring 302. By providing the fixing ring 302, the thermocouple body 1 in the protective top cover 3 can be fixed, and by providing the connecting through hole 303, it is convenient for the operator to connect the thermocouple body 1; a limiting ring 304 is provided on the top of the threaded mounting hole 301, and the limiting ring 304 is connected to the protective tube 2. The protective top cover 3 is integrally formed, and the position of the protective tube 2 can be limited by setting a limit ring 304. When used in conjunction with the first sealing rubber ring 202, the sealing performance can also be increased. The protective top cover 3 includes two groups of symmetrically arranged protective shells 305. The surfaces of the protective shells 305 are integrally provided with mounting plates 306. Bolts 307 are threadedly connected to the mounting plates 306. The two groups of protective shells 305 are fixedly connected by bolts 307 and the mounting plates 306. By setting the protective top cover 3 into two groups of symmetrical protective shells 305, it is convenient to install the protective top cover 3 on the outside of the thermocouple body 1, thereby reducing the operating difficulty of the operator. The contact portion of the two groups of protective shells 305 is provided with a sealing strip 308, and the sealing strip 308 is bonded to the protective shell 305 on one side by glue. By setting the sealing strip 308, the sealing performance of the inside of the protective top cover 3 is improved, and the influence of the external environment on the thermocouple body 1 is reduced, thereby increasing the service life.

[0031] When in use, the device is moved to a designated position, and two sets of protective shells 305 are respectively attached to the top two sides of the thermocouple body 1, and the connection jack of the thermocouple body 1 is aligned with the connection through hole 303, and multiple sets of corresponding mounting plates 306 are connected by bolts 307, and the bolts 307 are tightened by external tools, so that the two sets of protective shells 305 are fixed to the top outer side of the thermocouple body 1, and at the same time, the two sets of protective shells 305 squeeze the first sealing rubber ring 202, so that the sealing strip 308 fills the gap between the two sets of protective shells 305, and the protective tube 2 is sleeved on the surface of the insulating tube 101 and moved upward. , align the threaded protrusion 201 with the threaded mounting hole 301, rotate the protective tube 2, tighten the threaded protrusion 201 on the top of the protective tube 2 into the threaded mounting hole 301, connect and fix the protective tube 2 and the protective top cover 3, and at the same time, the first sealing rubber ring 202 on the top of the protective tube 2 is squeezed between the protective tube 2 and the limit ring 304 to achieve a sealed connection between the two, move the device so that the protective tube 2 and the measuring end 102 are inserted into the external measuring pipe, align the flange 4 and the external measuring pipe, and connect and fix them through an external connecting piece, and finally insert the external connecting wire into the connection hole 303 to connect it to the thermocouple body 1.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rapid temperature measurement thermocouple, characterized in that: It comprises a thermocouple body (1), the bottom of which is fixedly connected to an insulating tube (101); It also comprises a protection tube (2), the protection tube (2) being sleeved on the outer surface of the insulating tube (101), the top of the protection tube (2) being integrally formed with a threaded protrusion (201), and the top surface of the protection tube (2) being bonded with a first sealing rubber ring (202) by glue; It also includes a protective top cover (3) for protecting the top of the thermocouple body (1), wherein the bottom of the protective top cover (3) is provided with a threaded mounting hole (301) for use with the threaded protrusion (201), and a fixing ring (302) for fixing the thermocouple body (1) is provided above the threaded mounting hole (301), and the fixing ring (302) is fixedly connected to the inner wall of the protective top cover (3), and a connection through hole (303) for the connection socket of the thermocouple body (1) to pass through is provided above the fixing ring (302).

2. A rapid temperature measurement thermocouple according to claim 1, characterized in that: A limiting ring (304) is provided at the top of the threaded mounting hole (301), and the limiting ring (304) is integrally formed with the protective top cover (3).

3. A rapid temperature measurement thermocouple according to claim 2, characterized in that: The protective top cover (3) comprises two groups of symmetrically arranged protective shells (305), and the surfaces of the protective shells (305) are integrally provided with mounting plates (306) all around.

4. A rapid temperature measurement thermocouple according to claim 3, characterized in that: Bolts (307) are threadedly connected to the mounting plate (306), and the two groups of protective shells (305) are fixedly connected via the bolts (307) and the mounting plate (306).

5. A rapid temperature measurement thermocouple according to claim 4, characterized in that: A sealing strip (308) is provided at the contacting portion of the two groups of protective shells (305), and the sealing strip (308) is bonded to the protective shell (305) on one side by glue.

6. A rapid temperature measurement thermocouple according to claim 1, characterized in that: A flange (4) is fixedly mounted on the outer surface of the protection tube (2), a connection hole (5) is provided on the flange (4), and a second sealing rubber ring (6) is bonded to the bottom of the flange (4) by glue.

7. A rapid temperature measurement thermocouple according to claim 6, characterized in that: A measuring end (102) is provided at the bottom of the protection tube (2), and the measuring end (102) is fixedly connected to the insulating tube (101).

8. A rapid temperature measurement thermocouple according to claim 7, characterized in that: Two groups of thermocouples (103) made of different materials are welded to the top of the measuring end (102), and the thermocouples (103) are arranged inside the insulation.

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