CN203349946U

CN203349946U - Pressure type thermometer

Info

Publication number: CN203349946U
Application number: CN 201320330716
Authority: CN
Inventors: 孙博睿
Original assignee: NANYANG HUAYE EXPLOSION PROTECTED INSTRUMENT CO Ltd
Current assignee: NANYANG HUAYE EXPLOSION PROTECTED INSTRUMENT CO Ltd
Priority date: 2013-06-08
Filing date: 2013-06-08
Publication date: 2013-12-18
Anticipated expiration: 2023-06-08

Abstract

The utility model discloses a pressure type thermometer using a spring tube in a plurality of loops of O shapes. The pressure type thermometer comprises a thermometer main body, a capillary and a temperature-sensitive bag; the thermometer main body is composed of a housing, a dial and a spring tube in plurality of loops; and spring tube in the plurality of loops is winded by a flat copper pipe on the same horizontal surface, the center of the flat copper pipe is connected with a pointer rotating shaft connected with a pointer, and the end of the periphery of the flat copper pipe is connected with the temperature-sensitive bag via the capillary. By adopting the above technical scheme, rotation of the pointer can be drove directly by expansion caused by heat and contraction caused by cold of the spring tube in the plurality of loops of the O shapes, a gear amplifying structure is needless, and many problems brought by the gear structure can be overcome. Compared with the prior art, the pressure type thermometer can satisfy requirements of the pointer and raise the precision of temperature measurement, and the elasticity of the spring tube is good, the spring tube is not easy to break, so the service life of the pressure type thermometer is long.

Description

The pressure type thermometer

Technical field

The utility model relates to the pressure type thermometric instrument, is specifically related to a kind of use multi-turn 0 shape bourdon tube pressure type thermometer.

Background technology

What traditional pressure type thermometric instrument adopted is C shape bourdon tube, and this bourdon tube is subject to the restriction of length, and bourdon tube free end travel distance is less, can not meet the requirement of pointer action, so the displacement that must adopt gear mechanism to amplify bourdon tube.Even it is high again that the gear mechanism precision is done, also there is certain back lash, when temperature changes up and down, forward and reverse reversing will occur in gear, during motion, must produce hysteresis phenomenon, the accuracy of impact indication.Moreover the thermometric instrument of this structure will inevitably affect the precision of instrument own and serviceable life because drive disk assembly is more.This has great impact for the accuracy of measuring various medium temperatures in industrial occasions, urgently develops that a kind of precision is high, the new-type pressure and temp instrument of long service life.

Summary of the invention

In order to address the above problem, the purpose of this utility model is to provide a kind of use multi-turn 0 shape bourdon tube pressure type thermometer, can meet the pointer requirement, increases temperature measurement accuracy; And the bourdon tube good springiness, frangibility not, long service life.

To achieve these goals, the technical solution adopted in the utility model is: described pressure type thermometer has thermometer main body, kapillary and temperature-sensitive bag, and wherein the thermometer main body is comprised of shell, dial plate and multi-turn bourdon tube; Described multi-turn spring is to be formed by flat copper tube coiling on same level, its center-side pointer shaft of ining succession, and the rotating shaft pointer of ining succession, its peripheral ends is connected with the temperature-sensitive bag by kapillary.

In the bourdon tube of described pressure type thermometer, encapsulation is not mercury, is a kind of harmless liquid, there is no environmental pollution.

For obtaining the said goods, the manufacture craft that the utility model is taked is: while making this bourdon tube, require copper pipe purity high, good springiness; The pipe of producing requires tube wall thin, and thickness is even, and error is at 0.01mm; Length surpasses 1.4m, draws difficulty larger.When this pressure type thermometric instrument, after first body being flattened in parastate, the relative center line in both sides, 1.4m must not surpass 1mm with interior error, then coiling body on the thermometer gauge stand, while winding process needs quench coiling, the 0 type bourdon tube coiled requires evenly smooth.

This multi-turn 0 shape bourdon tube has following characteristics: earthquake-proof function is good, is applicable to shake temperature survey on fierce diesel engine, air compressor machine; The simple science of gear train, failure rate is low; Long service life; Accurately, error is less in action; Be quick on the draw, there is no hysteresis phenomenon; Hand motion is level and smooth, there is no the bouncing pilotage phenomenon; Collocation structure is special, the occasion that the cold and hot variation of the temperature that conforms is larger; Installation site and angle are not had to specific (special) requirements; Adopt harmless medium, security performance is good; Non-corrosiveness, containing low-melting-point metal, not can be applicable to the core field; The thermometer bulb size scope of application is very wide.

Because the utility model has been taked technique scheme, by the next direct push pointer rotation of the rising-heat contracting-cold of multi-turn 0 type bourdon tube, without the gear enlarger, many drawbacks that gear mechanism brings have been overcome.This pressure type thermometric instrument, when work, because multi-turn 0 type bourdon tube free end travel is larger, expands with heat and contract with cold direct push pointer rotation by it, and without the process intermediate transmission mechanism, temperature measurement accuracy increases.Simultaneously, because the material purity of 0 type bourdon tube is high, good springiness, and through quenching technical, frangibility, can not affect its normal operation.Compared with prior art, the utlity model has and can meet the pointer requirement, increase temperature measurement accuracy; And the bourdon tube good springiness, frangibility not, the advantages such as thermometric instrument long service life.

The accompanying drawing explanation

Below in conjunction with accompanying drawing and example, architectural feature of the present utility model is described further.

Fig. 1 is structural representation of the present utility model.

Fig. 2 is multi-turn 0 type bourdon tube front view of the present utility model.

Fig. 3 is thermometer main body right view of the present utility model.

Fig. 4 is thermometer main body cross-sectional view of the present utility model.

In accompanying drawing, 1. thermometer main body, 2. kapillary, 3. temperature-sensitive bag, 4. pointer, 5. multi-turn bourdon tube.

Embodiment

Referring to accompanying drawing, pressure type thermometer described in the utility model has thermometer main body 1, kapillary 2 and temperature-sensitive bag 3, and wherein thermometer main body 1 is comprised of shell, dial plate and multi-turn bourdon tube 5; Described multi-turn bourdon tube 5 is to be formed by flat copper tube coiling on same level, its center-side pointer shaft of ining succession, and the rotating shaft pointer 4 of ining succession, its peripheral ends is connected with temperature-sensitive bag 3 by kapillary 2.

Claims

1. a pressure type thermometer ,described pressure type thermometer has thermometer main body, kapillary and temperature-sensitive bag, it is characterized in that described thermometer main body is comprised of shell, dial plate and multi-turn bourdon tube; Described multi-turn spring is to be formed by flat copper tube coiling on same level, its center-side pointer shaft of ining succession, and the rotating shaft pointer of ining succession, its peripheral ends is connected with the temperature-sensitive bag by kapillary.