CN211477434U

CN211477434U - Bimetal temperature transmitter

Info

Publication number: CN211477434U
Application number: CN201922056753.5U
Authority: CN
Inventors: 王荣庆
Original assignee: Shanghai Honglang Automation Instrument Co ltd
Current assignee: Shanghai Honglang Automation Instrument Co ltd
Priority date: 2019-11-26
Filing date: 2019-11-26
Publication date: 2020-09-11
Anticipated expiration: 2029-11-26

Abstract

The utility model discloses a bimetal temperature transmitter, including bimetal sensor and transmission module, transmission module includes the terminal box, the wiring mouth that makes things convenient for inside electric wire to come in and go out is seted up to the side of terminal box, the inside of terminal box is provided with temperature transmitter, temperature transmitter passes through the bottom of fixed screw fixed connection at the terminal box, temperature transmitter's upper surface is provided with binding post. This bimetal temperature transmitter, because the coefficient of thermal expansion on each component layer of bimetal inductor is different, when temperature variation, the deformation on initiative layer will be greater than the deformation on passive layer, thereby the whole of bimetal inductor will be to passive layer one side bending, thereby this kind of combined material's camber changes and produces deformation, the deformation volume of bimetal inductor is finally embodied with the figure through temperature transmitter's signal conversion, it is less that bimetal inductor receives the influence of temperature, and not influenced by the dirt, thereby the precision of detection has been improved.

Description

Bimetal temperature transmitter

Technical Field

The utility model relates to a temperature transmitter technical field specifically is a bimetal temperature transmitter.

Background

The temperature transmitter adopts a thermocouple and a thermal resistor as temperature measuring elements, signals output by the temperature measuring elements are transmitted to a transmitter module, and are converted into 4-20mA current signals 0-5V/0-10V voltage signals which are in linear relation with the temperature after being processed by circuits such as voltage stabilizing filtering, operational amplification, nonlinear correction, V/I conversion, constant current and reverse protection, and RS485 digital signals are output.

When the thermal resistor is used, the thermal resistor is arranged on a horizontal or vertical pipeline as far as possible, the thermal resistor is selected when the temperature is generally measured at-50-400 ℃, the measurement result is influenced when the temperature is too low or too high, the thermal resistor is limited by the temperature, when the thermocouple is used, if the thermocouple is insulated, the insulation between the thermocouple electrodes and the furnace wall is poor due to the fact that the protection tube and the stay wire plate are excessively polluted or salt slag, the insulation is more serious at high temperature, the loss of thermoelectric potential can be caused, interference can also be introduced, and the error caused by the interference can reach hundreds of degrees.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a bimetal temperature transmitter to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a bimetal temperature transmitter comprises a bimetal sensor and a transmission module, wherein the transmission module comprises a junction box, the side surface of the junction box is provided with a wiring port facilitating the coming in and coming out of an internal electric wire, the inside of the junction box is provided with a temperature transmitter, the temperature transmitter is fixedly connected to the bottom of the junction box through a fixing screw, the upper surface of the temperature transmitter is provided with a wiring terminal, two ends of the upper surface of the temperature transmitter are provided with mounting holes, the middle part of the upper surface of the temperature transmitter is provided with a lead hole, the upper surface of the temperature transmitter is respectively provided with a zero position adjusting button and a range adjusting button, the bottom end of the junction box is fixedly connected with a cold end pipe, the bottom end of the cold end pipe is in threaded connection with a movable nut, the bottom end of the movable nut is fixedly connected with a movable sleeve thread, the bottom fixedly connected with protection tube of flange, the inside cover of protection tube is equipped with bimetal inductor, bimetal inductor's surface cover is equipped with one deck insulator.

Preferably, the number of the connecting terminals is five, the connecting terminals are divided into two groups, one group of two connecting terminals are 24VDC direct current power supply connecting terminals, and one group of three connecting terminals are temperature sensing connecting terminals of the bimetallic sensor.

Preferably, the bimetal inductor is divided into an active layer and a passive layer, the metal material of the active layer is manganese-nickel-copper alloy, and the metal material of the passive layer is nickel-iron alloy.

Preferably, the insulator is made of mica sheets, and the protection tube is made of a corundum ceramic tube with high temperature resistance and high mechanical property.

Preferably, the length of the cold-end pipe is generally 150 mm, and a cold-end compensation element is arranged inside the cold-end pipe when the temperature is measured at a temperature lower than 120 ℃.

Preferably, both sides of the wiring terminal are provided with insulating baffles for preventing short circuit caused by touching of the wiring terminals.

Advantageous effects

The utility model provides a bimetal temperature transmitter possesses following beneficial effect:

1. this bimetal temperature transmitter, because the coefficient of thermal expansion on each component layer of bimetal inductor is different, when temperature variation, the deformation on initiative layer will be greater than the deformation on passive layer, thereby the whole of bimetal inductor will be to passive layer one side bending, thereby this kind of combined material's camber changes and produces deformation, the deformation volume of bimetal inductor is finally embodied with the figure through temperature transmitter's signal conversion, it is less that bimetal inductor receives the influence of temperature, and not influenced by the dirt, thereby the precision of detection has been improved.

2. This bimetal temperature changer can change the bimetal inductor through setting up movable nut to reach the effect of being convenient for keep a public place clean and portable, through setting up the loop screw thread, can fix this equipment at the surface of detecting the body, thereby environment to its influence when having reduced the detection, improved detection efficiency.

Drawings

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

FIG. 2 is a schematic diagram of a top view structure of the temperature transmitter of the present invention;

fig. 3 is a schematic view of the partial sectional structure of the bimetal sensor of the present invention.

In the figure: the temperature-sensing device comprises a junction box 1, a junction port 2, a temperature-sensing temperature transmitter 3, a temperature-sensing temperature.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: the utility model provides a bimetal temperature transmitter, including bimetal sensor and transmission module, the transmission module includes terminal box 1, the wiring mouth 2 that makes things convenient for inside electric wire to come in and go out is seted up to terminal box 1's side, terminal box 1's inside is provided with temperature transmitter 3, temperature transmitter 3 passes through 4 fixed connection in terminal box 1's bottom of fixed screw, temperature transmitter 3's upper surface is provided with binding post 5, binding post 5's quantity is five, binding post 5 divides into two sets ofly altogether, a set of two are 24VDC DC power supply binding post 16, a set of three temperature-sensing binding post 17 that is bimetal inductor, binding post 5's both sides all are provided with the insulating barrier 20 that prevents that the touching short circuit phenomenon of connecting wire from taking place, the security of whole device.

Mounting holes 6 have been seted up at temperature transmitter 3's upper surface both ends, lead hole 7 has been seted up at temperature transmitter 3's upper surface middle part, lead hole 7 mainly introduces the response of bimetal inductor to temperature-sensing binding post 17 on, guarantee the security and the aesthetic property of wiring, temperature transmitter 3's upper surface is provided with zero adjustment button 8 and range adjustment button 9, zero adjustment button 8 mainly plays the zero setting effect of device, zero setting all will be carried out before work at every turn, guarantee the accuracy of testing result, range adjustment button 9 mainly adjusts according to detecting approximate temperature range, prevent that the range is too big or the range undersize, influence the accuracy nature that detects.

The bottom fixedly connected with cold end pipe 10 of terminal box 1, the length of cold end pipe 10 is generally 150 millimeters, the inside of cold end pipe 10 is provided with cold junction compensation element, when being less than 120 ℃ temperature measurement, cold end pipe 10 length can 100 millimeters or 50 millimeters, when being greater than 250 ℃ temperature measurement, cold end pipe 10 sees the influence condition can suitably add to 250 millimeters or 300 millimeters, the bottom threaded connection of cold end pipe 10 has movable nut 11, can change bimetal inductor through movable nut 11, thereby reached and be convenient for keep a public place clean and portable effect, movable nut 11's bottom fixedly connected with loop screw thread 12, through loop screw thread 12, can fix this equipment at the surface of detecting the body, thereby environment to its influence when having reduced the detection, detection efficiency has been improved.

Bottom fixedly connected with flange 13 of loop screw thread 12, the bottom fixedly connected with protection tube 14 of flange 13, the inside cover of protection tube 14 is equipped with bimetal inductor, bimetal inductor divide into active layer 18 and passive layer 19, the metal material of active layer 18 is manganese nickel copper alloy, the metal material of passive layer 19 is nickel iron alloy, the surface cover of bimetal inductor is equipped with one deck insulator 15, the material of insulator 15 is the mica sheet, the material of protection tube 14 is the temperature resistant, the corundum matter porcelain tube that mechanical properties is strong, protection tube 14 mainly protects inside bimetal material not to receive the damage.

The working principle is as follows: because the thermal expansion coefficients of all component layers of the bimetal sensor are different, when the temperature changes, the deformation of the active layer 18 is larger than that of the passive layer 19, so that the whole bimetal sensor can bend towards one side of the passive layer 19, the curvature of the composite material changes to generate deformation, the deformation of the bimetal sensor is finally reflected in a digital mode through the signal conversion of the temperature transmitter 3, the bimetal sensor is less affected by the temperature and is not affected by dirt, the detection effect is improved, the bimetal sensor can be replaced through the movable nut 11, the cleaning and portable effects are achieved, the equipment can be fixed on the outer surface of a detection body through the movable sleeve thread 12, the influence of the environment on the bimetal sensor during detection is reduced, and the detection efficiency is improved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a bimetal temperature transmitter, includes bimetal sensor and transmitting module, its characterized in that: the transformer module comprises a junction box (1), a wiring port (2) convenient for an internal electric wire to come in and go out is formed in the side face of the junction box (1), a temperature transmitter (3) is arranged inside the junction box (1), the temperature transmitter (3) is fixedly connected to the bottom of the junction box (1) through a fixing screw (4), a wiring terminal (5) is arranged on the upper surface of the temperature transmitter (3), mounting holes (6) are formed in two ends of the upper surface of the temperature transmitter (3), a lead hole (7) is formed in the middle of the upper surface of the temperature transmitter (3), a zero adjusting button (8) and a range adjusting button (9) are respectively arranged on the upper surface of the temperature transmitter (3), a cold end pipe (10) is fixedly connected to the bottom end of the junction box (1), and a movable nut (11) is connected to the bottom end of the cold end pipe (10), the bottom fixedly connected with loop screw thread (12) of activity nut (11), the bottom fixedly connected with flange (13) of loop screw thread (12), the bottom fixedly connected with protection tube (14) of flange (13), the inside cover of protection tube (14) is equipped with bimetal inductor, bimetal inductor's surface cover is equipped with one deck insulator (15).

2. The bimetallic temperature transmitter of claim 1, wherein: the number of the connecting terminals (5) is five, the connecting terminals (5) are divided into two groups, one group of two connecting terminals are 24VDC direct-current power supply connecting terminals (16), and the other group of three connecting terminals are temperature sensing connecting terminals (17) of the bimetallic sensor.

3. The bimetallic temperature transmitter of claim 1, wherein: the bimetal inductor is divided into an active layer (18) and a passive layer (19), the metal material of the active layer (18) is manganese-nickel-copper alloy, and the metal material of the passive layer (19) is nickel-iron alloy.

4. The bimetallic temperature transmitter of claim 1, wherein: the insulator (15) is made of mica sheets, and the protection tube (14) is made of a corundum ceramic tube with high temperature resistance and high mechanical property.

5. The bimetallic temperature transmitter of claim 1, wherein: the length of the cold end pipe (10) is generally 150 mm, and a cold end compensation element is arranged inside the cold end pipe (10).

6. The bimetallic temperature transmitter of claim 1, wherein: and the two sides of the wiring terminal (5) are provided with insulating baffles (20) for preventing short circuit caused by touching of the wiring terminals.