Large-aperture temperature sensor

Abstract

The invention relates to the technical field of a temperature sensor, and specifically relates to a large-aperture temperature sensor. The large-aperture temperature sensor comprises a temperature sensor housing, a temperature probe, a probe protective tube, a sleeve, a positioning sleeve and a fastening screw. The sleeve is a cylindrical shell with an opening at one end; the positioning sleeve is composed of a baffle table and a connection sleeve at the lower end of the baffle table; the connection sleeve has a lower end fixedly connected with the opening end of the sleeve and an upper end fixedly connected with the baffle table; the centers of the baffle table, the connection sleeve and the sleeve are provided with a through hole; the outer wall of the connection sleeve is provided with an outer thread; the temperature sensor housing is internally provided with a temperature-sensing element; the temperature probe and the temperature-sensing element are connected; the probe protective tube sleeves the temperature probe; and the probe protective tube passes through the positioning sleeve and the lower portion of the probe protective tube is sealed in the sleeve. The large-aperture temperature sensor is characterized in that an outer hexagonal nut sleeves the upper end of the probe protective tube, the lower end of the outer hexagonal nut on the probe protective tube is provided with a connection screw rod, and the upper portion of the center of the positioning sleeve is provided with a fastening screwed hole. By adopting such a structure, the large-aperture temperature sensor has the advantages of simple structure, convenient use, firmness and durability, convenient installation, reliable fixation, safety and theft prevention, and the like.

Description

technical field [0001] The invention relates to the technical field of temperature sensors, in particular to a large-diameter temperature sensor. Background technique [0002] As we all know, the temperature sensor converts the temperature of the object into an electrical signal output to obtain a specific temperature value. The temperature sensor used on the existing large-diameter heat meter includes a temperature sensor housing, a temperature probe, a probe protection tube, a sleeve cylinder, a positioning sleeve and a set screw, the sleeve is a cylinder with one end open, and the positioning sleeve is composed of a stopper and a connecting sleeve at the lower end of the stopper. There is an external thread, the lower end of the connecting sleeve is fixedly connected with the open end of the sleeve, and the upper end is fixedly connected with the block, the center of the block, the connecting sleeve and the sleeve is provided with a through hole, and the temperature sens...

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Problems solved by technology

[0002] As we all know, the temperature sensor converts the temperature of the object into an electrical signal output to obtain a specific temperature value. The temperature sensor used on the existing large-diameter heat meter includes a temperature sensor housing, a temperature probe, a probe protection tube, a sleeve cylinder, a positioning sleeve and a set screw, the sleeve is a cylinder with one end open, and the positioning sleeve is composed of a stopper and a connecting sleeve at the lower end of the stopper. There is an external thread, the lower end of the connecting sleeve is fixedly connected with the open end of the sleeve, and the upper end is fixedly connected with the block, the center of the block, the connecting sleeve and the sleeve is provided with a through hole, and the temperature sensor housing is equipped with a temperature sensing element. The needle is connected with the temperature sensing element, the temperature probe is covered with a probe protection tube, the probe protection tube passes through the positioning sleeve, and the lower part is sealed in the sleeve to achieve the function of secondary protection. The probe protection tube is tightened The fixed screw passes through the fixed screw hole on the side of the block and conflicts with the positioning sleeve to achieve the function of positioning the probe protection tube. When in use, it is connected to the tube body through the connecting sleeve. The disadvantages are: first, because the probe protection tube The upper part is exposed, and its ability to withstand external force is relatively weak, and it is easy to break under the action of external force, causing the temperature probe to fail to sense the temperature normally; the second is that the temperature probe is directly inserted into the positioning sleeve and sleeve by the probe protection tube , the side is fixed by set screws. The disadvantage of this structure is that the probe protection tube cannot be completely fixed. If the set screws are tightened forcefully, the probe protection tube will be flattened. If external force is used, the probe protection tube can be directly protected. Tube pulled out of positioning sleeve and sleeve, resulting in theft of temperature sensor

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