CN216349197U

CN216349197U - Thermocouple structure with double polycrystals

Info

Publication number: CN216349197U
Application number: CN202121787453.5U
Authority: CN
Inventors: 刘永灿; 游冠军
Original assignee: Wuxi Hongxin Sensor Technology Co ltd
Current assignee: Wuxi Hongxin Sensor Technology Co ltd
Priority date: 2021-08-02
Filing date: 2021-08-02
Publication date: 2022-04-19
Anticipated expiration: 2031-08-02

Abstract

The utility model discloses the technical field of temperature detection devices, in particular to a thermocouple structure with double polycrystals, which comprises a wire holder, an insulating tube, a protection tube, a thermode and a mounting sleeve, wherein the mounting sleeve is sleeved on one end of the thermode, which penetrates out of the protection tube, the lower end of the thermal electrode is provided with a hollow bulb, one end of the thermal electrode penetrating out of the protection tube is positioned in the bulb, the outer wall of the bulb is uniformly provided with a plurality of communicating holes communicated with the interior of the bulb, the bulb can protect the fluid from impacting the hot electrode, meanwhile, the intercommunicating pores are arranged, so that the thermal electrode can detect the temperature, and the impact on the thermal electrode is buffered by arranging the high-temperature resistant rubber sleeve, through setting up collet, rotating sleeve for the protection tube can install on fluid pipeline fast, and can adjust the degree of depth that the thermode stretched into in the fluid pipeline.

Description

Thermocouple structure with double polycrystals

Technical Field

The utility model relates to the technical field of temperature detection devices, in particular to a thermocouple structure with double polycrystals.

Background

In the industrial production process, the temperature is one of the important parameters to be measured and controlled, in the temperature measurement, the thermocouple is widely used, it has many advantages of simple structure, convenient manufacture, wide measurement range, high precision, small inertia and convenient remote transmission of output signal, in addition, because the thermocouple is a passive sensor, it does not need external power supply when measuring, it is very convenient to use, so it is often used to measure the temperature of gas or liquid in furnace and pipeline and the surface temperature of solid, the thermocouple is a temperature measuring element commonly used in temperature measuring instrument, it directly measures the temperature and converts the temperature signal into thermal electromotive force signal, and converts it into the temperature of measured medium by electric instrument (secondary instrument), the shapes of various thermocouples are often very different according to the need, but their basic structures are generally the same, usually by the thermal electrode, The main parts of the insulating sleeve protection tube, the junction box and the like are commonly matched with a display instrument, a recording instrument and an electronic regulator for use.

The current thermocouple mainly detects the fluid temperature in the fluid pipeline through the thermode, because the thermode is thinner, when the fluid velocity of flow in the fluid pipeline is bigger, the impact force to the thermode is bigger, and then produces the influence of buckling deformation easily to the thermode.

Based on this, the present invention designs a thermocouple structure with double polycrystals to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The present invention provides a thermocouple structure with double polycrystals, so as to solve the problem that the conventional thermocouple proposed in the above background technology mainly detects the temperature of a fluid in a fluid pipeline through a thermode, and because the thermode is thin, when the flow velocity of the fluid in the fluid pipeline is large, the impact force on the thermode is large, and further the thermode is easily affected by bending deformation.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a thermocouple structure with two polycrystal, includes connection terminal, insulating tube, protection tube, thermode, the thermode is installed on the connection terminal, insulating tube suit is in on the thermode and with the connection terminal is connected, the protection tube suit is in on the insulating tube, the coaxial rigid coupling of protection tube lower extreme has the installation cover, installation cover suit is in the thermode is worn out one of protection tube is served, and its lower extreme is equipped with a hollow bulb, the thermode is worn out the one end of protection tube is located in the bulb, evenly set up a plurality of intercommunicating pores rather than inside intercommunication on the bulb outer wall.

Preferably, a high-temperature-resistant rubber sleeve is arranged in the mounting sleeve in a penetrating manner, and the high-temperature-resistant rubber sleeve is sleeved on the thermoelectric electrode.

Preferably, the aperture of the communicating hole is not less than 2 mm.

Preferably, the wall thickness of the ball head is not less than 3 mm.

Preferably, the protective tube is sleeved with a mounting seat capable of freely sliding along the axial direction of the protective tube, an elastic chuck is fixedly connected to the mounting seat and comprises an integrated and coaxial cylindrical portion and a circular table portion, the cylindrical portion is fixedly connected to the mounting seat, the outer diameter of the circular table portion decreases gradually from top to bottom, a clamping hole for the hot electrode to be inserted and combined and a through hole is coaxially formed in the circular table portion, a plurality of notches communicated with the clamping hole and extending to the cylindrical portion are formed in the outer wall of the circular table portion, a rotating sleeve is sleeved on the cylindrical portion in a threaded manner, and a tapered groove matched with the circular table portion in shape and used for clamping the circular table portion is formed in the rotating sleeve.

Compared with the prior art, the utility model has the beneficial effects that: through setting up the bulb, can protect the impact of fluid to the thermode, set up the intercommunicating pore simultaneously, can make the thermode carry out temperature detection, through setting up high temperature resistant rubber sleeve for the thermode receives the impact and is cushioned, through setting up collet, rotating sleeve, makes the protection tube can install on fluid pipeline fast, and can adjust the depth that the thermode stretched into in the fluid pipeline.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the final assembly of the present invention;

FIG. 2 is an enlarged view of a portion of the structure at A in FIG. 1;

fig. 3 is a schematic structural view of the collet of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1-wire holder, 2-insulating tube, 3-protective tube, 4-taper groove, 5-circular table part, 6-rotating sleeve, 7-mounting seat, 8-mounting sleeve, 9-high temperature resistant rubber sleeve, 10-thermode, 11-ball head, 12-clamping hole, 13-notch, 14-cylindrical part and 15-communicating hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a thermocouple structure with double polycrystals comprises a wire holder 1, an insulating tube 2, a protection tube 3 and a thermode 10, wherein the thermode 10 is installed on the wire holder 1, the insulating tube 2 is sleeved on the thermode 10 and connected with the wire holder 1, the protection tube 3 is sleeved on the insulating tube 2, a mounting seat 7 capable of freely sliding along the axial direction of the protection tube 3 is sleeved on the protection tube 3, an elastic chuck is fixedly connected onto the mounting seat 7 and comprises an integral and coaxial cylindrical portion 14 and a circular table portion 5, the cylindrical portion 14 is fixedly connected onto the mounting seat 7, the outer diameter of the circular table portion 5 sequentially decreases from top to bottom, a through-hole-shaped clamping hole 12 in which a heating electrode 10 is inserted is coaxially formed in the mounting seat 7, a plurality of notches 13 which are communicated with the clamping hole 12 and extend to the cylindrical portion 14 are formed in the outer wall of the circular table portion 5, a rotating sleeve 6 is sleeved on the circular table portion 14 in a threaded manner, and a shape matched with the circular table portion 5 is formed in the rotating sleeve 6, And the cone groove 4 for clamping the circular platform part 5, when mounting, mounting the mounting base 7 on the external fluid pipeline through the screw, then driving the protection tube 3 to move up and down, adjusting the depth of the lower end of the thermode 10 extending into the fluid pipeline, then rotating the rotating sleeve 6, screwing the rotating sleeve 6 on the cylindrical part 14, and moving upwards, so that the circular platform part 5 is clamped with the inner wall of the cone groove 4, during the clamping process, the inner wall of the cone groove 4 and the circular platform part 5 slide relatively, at the same time, the inner wall of the cone groove 4 generates the radial inner side extrusion force to the circular platform part 5, in addition, the circular platform part 5 is provided with a gap 13, so that the circular platform part 5 generates the radial inner side elastic shrinkage, thereby the clamping hole 12 on the circular platform part 5 clamps the protection tube 3, so as to adjust the depth of the thermode 10 extending into the fluid pipeline, the lower end of the protection tube 3 is coaxially and fixedly connected with the mounting sleeve 8, the mounting sleeve 8 is sleeved on one end of the thermode 10 penetrating out of the protection tube 3, wear to be equipped with high temperature resistant rubber sleeve 9 in the installation cover 8, high temperature resistant rubber sleeve 9 suit is on thermode 10, high temperature resistant rubber sleeve 9 has the buffering when making thermode 10 receive radial extrusion force, 8 lower extremes of installation cover are equipped with a hollow bulb 11, the one end that thermode 10 wore out protection tube 3 is located bulb 11, evenly set up a plurality of intercommunicating pores 15 rather than inside intercommunication on the bulb 11 outer wall, fluid in the fluid pipeline is by intercommunicating pore 15 get into in bulb 11, and detect the fluid temperature in bulb 11 by thermode 10, the aperture of intercommunicating pore 15 is not less than 2mm, make in the fluid can flow into bulb 11 more rapidly, bulb 11 wall thickness is not less than 3mm, improve the anti fluid impact capacity of bulb 11.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the utility model disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the utility model to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best utilize the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A thermocouple structure with double polycrystals comprises a wire holder (1), an insulating tube (2), a protection tube (3) and a hot electrode (10), the thermode (10) is arranged on the wire holder (1), the insulation tube (2) is sleeved on the thermode (10) and connected with the wire holder (1), the protection tube (3) is sleeved on the insulation tube (2), it is characterized in that the lower end of the protection tube (3) is coaxially and fixedly connected with an installation sleeve (8), the mounting sleeve (8) is sleeved on one end of the thermode (10) penetrating out of the protection tube (3), the lower end of the heating tube is provided with a hollow bulb (11), one end of the heating electrode (10) penetrating out of the protection tube (3) is positioned in the bulb (11), the outer wall of the bulb (11) is uniformly provided with a plurality of communicating holes (15) communicated with the interior of the bulb.

2. The thermocouple structure with double polycrystal according to claim 1, wherein a high temperature resistant rubber sleeve (9) is penetrated in the mounting sleeve (8), and the high temperature resistant rubber sleeve (9) is sleeved on the hot electrode (10).

3. A thermocouple structure having a double polycrystal according to claim 1, wherein the diameter of the communication hole (15) is not less than 2 mm.

4. A thermocouple structure having a double polycrystal according to claim 1, wherein the wall thickness of the ball head (11) is not less than 3 mm.

5. The thermocouple structure with the double polycrystals according to claim 1, wherein the protection tube (3) is sleeved with an installation seat (7) capable of freely sliding along an axial direction thereof, the installation seat (7) is fixedly connected with an elastic chuck, the elastic chuck comprises an integrated and coaxial cylindrical portion (14) and a circular table portion (5), the cylindrical portion (14) is fixedly connected to the installation seat (7), the outer diameter of the circular table portion (5) decreases from top to bottom in sequence, a through hole type clamping hole (12) for the insertion of the hot electrode (10) is coaxially formed in the circular table portion, a plurality of notches (13) which are communicated with the clamping hole (12) and extend to the cylindrical portion (14) are formed in the outer wall of the circular table portion (5), the circular table portion (14) is sleeved with a rotating sleeve (6) in a threaded manner, and the rotating sleeve (6) is provided with a groove which is matched with the circular table portion (5) in shape, And a tapered groove (4) for engaging the circular table portion (5).