CN218566712U

CN218566712U - Magnetic-sticking type temperature sensor

Info

Publication number: CN218566712U
Application number: CN202222681571.9U
Authority: CN
Inventors: 黎卓韬; 陈晨; 陈玉柱
Original assignee: Guangdong Paisheng Industrial Technology Co ltd
Current assignee: Guangdong Paisheng Industrial Technology Co ltd
Priority date: 2022-10-11
Filing date: 2022-10-11
Publication date: 2023-03-03
Anticipated expiration: 2032-10-11

Abstract

The utility model discloses a magnetism pastes formula temperature sensor, including temperature sensing element, probe rod, shell and permanent magnet, the inside front end of probe rod is arranged in to temperature sensing element, inside the probe rod is fixed in the shell, the front end of probe rod is exposed in the shell outsidely, the permanent magnet is fixed in on the shell probe rod exerted one end, and the shell passes through the permanent magnet and links to each other with metal container. The temperature sensor of the utility model can be fixed without processing such as hole opening of carbon steel or magnetizable container, and can be firmly fixed on the vertical outer wall of the metal container.

Description

Magnetic-sticking type temperature sensor

Technical Field

The utility model relates to a sensor technical field, the more specifically magnetism pastes formula temperature sensor that says so.

Background

The temperature sensor is one of four sensors commonly used in the field of modern industrial automation, and can be suitable for various industrial occasions. A probe is generally disposed on a conventional temperature sensor, and includes a temperature sensing element (generally, an RTD resistance temperature sensor), and a connector with threads is disposed on the probe. When the temperature sensor is used, the temperature sensor is fixed in a container or a pipeline containing a temperature medium through the connector, the temperature sensor and the medium are subjected to sufficient heat exchange, the electrical characteristics of the sensor are changed by the temperature change of the sensor, and therefore an electrical signal of the sensor is transmitted to the acquisition module.

For some special industrial occasions, holes cannot be formed in the industrial container, threads cannot be machined in the industrial container, and the temperature sensor cannot be connected and fixed with the container through the threads. When it is desired to detect the temperature of the medium in the container, the conventional temperature sensor cannot be used. In order to solve the problems, an external temperature sensor appears in the market at present, the external temperature sensor is a metal block with a cambered surface, and a temperature sensitive element is arranged in the metal block. When in use, the metal block is stuck on a metal container (carbon steel or magnetizable container) by heat-conducting silicone grease and gluing. However, for a station vertical to the outer wall, the externally-attached temperature sensor is generally difficult to fix and is not firm after being fixed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a magnetism pastes formula temperature sensor, this temperature sensor can fix under the condition that need not carry out processing such as trompil to carbon steel or magnetizable container, and also can firmly fix on the perpendicular outer wall of metal container.

The technical scheme is as follows:

the magnetic-pasting type temperature sensor comprises a temperature sensitive element, a probe rod, a shell and a permanent magnet, wherein the temperature sensitive element is arranged at the front end of the inner part of the probe rod, the probe rod is fixed in the shell, the front end of the probe rod is exposed out of the shell, the permanent magnet is fixed at one end, exposed out of the probe rod, of the shell, and the shell is connected with a metal container through the permanent magnet.

Preferably, a through hole is formed in the middle of the permanent magnet, the diameter of the through hole is matched with the outer diameter of the probe rod, and one end of the probe rod penetrates through the through hole and then is exposed outside the shell.

Preferably, the shell is provided with a fixing portion, the permanent magnet is matched with the fixing portion, and the permanent magnet is fixed in the fixing portion.

Preferably, the shell includes a shell outer tube and a base, the base is fixed on the shell outer tube, and the probe rod is fixed on the base.

Preferably, the housing further comprises a protective cap, the protective cap is in threaded connection with the base, and the permanent magnet is fixed on the protective cap.

Preferably, the base is provided with a first connecting surface and a second connecting surface, the base is connected with the front end surface of the outer tube of the shell through the first connecting surface, and the base is connected with the side surface connected with the front end surface of the outer tube of the shell through the second connecting surface.

Preferably, the base and the outer tube of the shell are connected by welding.

Preferably, the front end of the probe rod protrudes out of the front end of the shell, or the front end of the probe rod is flush with the front end of the shell.

Preferably, the magnetic-adhesion type temperature sensor further comprises a transmitting module and a cable, the transmitting module is fixed in the accommodating cavity of the shell, the temperature sensitive element is connected with the transmitting module, and one end of the cable is connected with the transmitting module.

Preferably, magnesium oxide is filled between the inner wall of the probe rod and the temperature sensitive element.

The advantages or principles of the invention are explained below:

the magnet type temperature sensor is characterized in that a permanent magnet is fixed on a shell, the permanent magnet has the characteristics of strong magnetism and high temperature resistance, and the permanent magnet has excellent magnetism in an environment below 350 ℃. When the temperature sensor is used, the temperature sensor can be fixed on a carbon steel or magnetizable metal container through the permanent magnet, and the front end of the probe rod is tightly attached to the outer wall of the container, so that the temperature of a medium in the container is detected through the temperature sensitive element. The permanent magnet is directly fixed with the container, and can be firmly fixed on the vertical outer wall of the container and is easy to fix. The processing such as drilling holes on the carbon steel or the magnetizable container is not needed.

Drawings

Fig. 1 is a sectional view of a magnet type temperature sensor according to the present invention;

fig. 2 is an exploded view of the magnet type temperature sensor of the present invention;

FIG. 3 is a cross-sectional view of a magnetic temperature sensor according to one embodiment;

description of reference numerals:

10. a temperature sensitive element; 20. a probe rod; 30. a housing; 40. a permanent magnet; 31. an accommodating cavity; 41. a through hole; 32. a fixed part; 33. a housing outer tube; 34. a base; 35. a protective cap; 341. a first connection face; 342. a second connection face; 50. a transmitting module; 60. and (3) a cable.

Detailed Description

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "center", "inner", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.

As shown in fig. 1 and fig. 2, the present embodiment discloses a magnetic-type temperature sensor, which includes a temperature sensing element 10, a probe 20, a housing 30 and a permanent magnet 40. Wherein, the temperature sensitive element 10 is arranged at the front end of the inner part of the probe rod 20. Preferably, the temperature sensitive element 10 is an RTD resistance temperature sensor, an NTC thermistor, a thermocouple, etc., and the electrical signal of the temperature sensitive element 10 changes linearly with the change of temperature.

The housing 30 has a receiving cavity 31 therein, and the probe 20 is fixed in the receiving cavity 31 inside the housing 30 and protected by the housing 30. The probe 20 is a tubular structure, and the front end part of the probe is sealed to seal the temperature sensitive element 10 inside. The length of the protective probe 20 can be determined according to the field use requirement. In order to improve the detection effect of the temperature sensor, a powder filler with high thermal conductivity and high insulation degree is filled between the inner wall of the probe rod 20 and the temperature sensitive element 10 to ensure that the temperature sensitive element 10 is well fixed and obtain good heat sensitivity. Preferably, the powdered filler is magnesium oxide.

The front end of the probe rod 20 is exposed out of the casing 30, the permanent magnet 40 is fixed on the exposed end of the probe rod 20 on the casing 30, and the casing 30 is connected with the metal container through the permanent magnet 40. The permanent magnet 40 is of an annular structure, a through hole 41 is formed in the middle of the permanent magnet 40, the diameter of the through hole 41 is matched with the outer diameter of the probe rod 20, and one end of the probe rod 20 passes through the through hole 41 and then is exposed outside the shell 30.

In order to fix the permanent magnet 40 to the housing 30, the housing 30 of the present embodiment is provided with a fixing portion 32, the permanent magnet 40 is matched with the fixing portion 32, and the permanent magnet 40 is fixed in the fixing portion 32. Preferably, the fixing portion 32 is a fixing groove matched with the annular permanent magnet 40.

The casing 30 includes a casing outer tube 33 and a base 34, the base 34 is fixed on the casing outer tube 33, and the probe 20 is fixed on the base 34. The probe rod 20 and the base 34 are fixed by girth welding. Further, the housing 30 further includes a protective cap 35, the protective cap 35 is screwed with the base 34, and the permanent magnet 40 is fixed on the protective cap 35.

In order to seal the connection between the outer casing tube 33 and the base 34, a first connection surface 341 and a second connection surface 342 are provided on the base 34, the base 34 is connected to the front end surface of the outer casing tube 33 through the first connection surface 341, and the base 34 is connected to the side surface connected to the front end surface of the outer casing tube 33 through the second connection surface 342. The connection between the base 34 and the outer tube 33 of the shell is welded. Through the above connection mode, the connection position of the base 34 and the outer tube 33 of the shell is hermetically connected.

The magnetic-adhesion type temperature sensor further comprises a transmitting module 50 and a cable 60, wherein the transmitting module 50 is fixed in the accommodating cavity 31 of the shell 30, the temperature sensitive element 10 is connected with the transmitting module 50, and one end of the cable 60 is connected with the transmitting module 50. The transmitting module 50 is a transmitting module 50 commonly used in the existing temperature sensor, and is mainly used for acquiring an electrical signal of the temperature sensitive element 10 and converting the electrical signal into a standard signal commonly used in the industrial field, including 4-20 mA, 0-5V, RS485 Modbus _ RTU, and the like. The transmission module 50 has a temperature compensation function, a linearization adjustment function, a linear global transfer function, and the like.

In one embodiment, as shown in fig. 3, the front end of the probe 20 may protrude from the front end of the housing 30, and the protruding length may be set as required, so that the probe 20 can be more close to the medium to be measured in the container. In use, the probe 20 can be placed inside the container through an opening in the container. In another embodiment, as shown in FIG. 1, the front end of the probe 20 is flush with or slightly protruding from the front end of the housing 30, and the front end of the probe 20 is flush with the outer wall of the container when in use.

The magnet type temperature sensor of the present embodiment has the permanent magnet 40 fixed to the housing 30, and the permanent magnet 40 has the characteristics of strong magnetism and high temperature resistance, and has excellent magnetism in an environment below 350 ℃. When the temperature sensor is used, the temperature sensor can be fixed on a carbon steel or magnetizable metal container through the permanent magnet 40, and the front end of the probe rod 20 is tightly attached to the outer wall of the container, so that the temperature of a medium in the container is detected through the temperature sensitive element 10. The permanent magnet 40 is directly fixed with the container, and can be firmly fixed on the vertical outer wall of the container and is easy to fix. The processing such as drilling is not needed to be carried out on the carbon steel or the magnetizable container, and the installation and the disassembly are convenient.

The 'container' and the 'metal container' are carbon steel or magnetizable metal containers.

The embodiment of the present invention is not limited to this, according to the above-mentioned content of the present invention, the common technical knowledge and the conventional means in the field are utilized, without departing from the basic technical idea of the present invention, the present invention can also make other modifications, replacements or combinations in various forms, all falling within the protection scope of the present invention.

Claims

1. The magnetic-pasting type temperature sensor is characterized by comprising a temperature sensitive element, a probe rod, a shell and a permanent magnet, wherein the temperature sensitive element is arranged at the front end of the interior of the probe rod, the probe rod is fixed in the shell, the front end of the probe rod is exposed out of the shell, the permanent magnet is fixed at one exposed end of the probe rod on the shell, and the shell is connected with a metal container through the permanent magnet.

2. The magnetic-patch temperature sensor according to claim 1, wherein a through hole is formed in the middle of the permanent magnet, the diameter of the through hole is matched with the outer diameter of the probe rod, and one end of the probe rod passes through the through hole and then is exposed outside the shell.

3. The magnetic contact type temperature sensor according to claim 1, wherein the housing is provided with a fixing portion, and the permanent magnet is matched with the fixing portion and fixed in the fixing portion.

4. The magnetically-bonded temperature sensor according to any one of claims 1 to 3, wherein the housing comprises an outer housing tube and a base, the base is fixed on the outer housing tube, and the probe is fixed on the base.

5. The magnetic contact temperature sensor of claim 4, wherein the housing further comprises a protective cap, the protective cap is in threaded connection with the base, and the permanent magnet is fixed to the protective cap.

6. The magnetic contact type temperature sensor according to claim 4, wherein the base has a first connecting surface and a second connecting surface, the base is connected to the front end surface of the outer tube of the housing through the first connecting surface, and the base is connected to the side surface of the outer tube of the housing through the second connecting surface.

7. The magnetic temperature sensor of claim 4, wherein the base is connected to the outer tube of the housing by welding.

8. The magnetic temperature sensor according to any one of claims 1 to 3, wherein the front end of the probe protrudes from the front end of the housing, or the front end of the probe is flush with the front end of the housing.

9. The magnetic temperature sensor according to any one of claims 1 to 3, further comprising a transmitting module and a cable, wherein the transmitting module is fixed in the accommodating cavity of the housing, the temperature sensitive element is connected with the transmitting module, and one end of the cable is connected with the transmitting module.

10. The magnetic temperature sensor of claim 1, wherein magnesium oxide is filled between the inner wall of the probe and the temperature sensitive element.