CN2472209Y

CN2472209Y - Thermocoupler with protector

Info

Publication number: CN2472209Y
Application number: CN 01238822
Authority: CN
Inventors: 杜跃
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-04-11
Filing date: 2001-04-11
Publication date: 2002-01-16
Anticipated expiration: 2011-04-11

Abstract

The utility model belongs to the technical field of a thermocouple with a protective unit designed for use on gas appliances, which comprises a positive pole and a negative pole; wherein, the positive pole and the negative pole are welded together at the end. The utility model is characterized in that a metal casing is sleeved on the head of the thermocouple; the metal casing and the thermocouple are bonded and fixed by the high-temperature resistant inorganic silicate high temperature glue. The utility model has the advantages of small volume, lightweight and long service life, therefore is applicable for popularization and application on gas appliances.

Description

A kind of thermopair with protective device

The utility model relates to a kind of thermopair, especially with the thermopair technical field of protective device.

Existing thermopair generally is to adopt different metal materials as positive pole and negative pole, then at head with being welded to connect, this has been a general knowledge.But when work, the weld of thermopair is in the thermal-flame always, growth in time, after to a certain degree, the external branch of weld consumes gradually, makes positive pole and negative pole no longer be in the fusion state, can be separated from each other, thereby lose the ability that produces the temperature difference heat galvanic couple, the life-span of thermopair so far finishes.In order to address this problem; a lot of scientific and technical personnel have designed new thermopair; generalized case is the thermopair of band protective device; it as the patent No. 87214110 Chinese patent " electric thermo-couple protector "; the protective device of this thermopair; has the cavity that the heat supply galvanic couple inserts; it is characterized in that described protective device is coated with based on graphite and adds the protective seam of silit, bentonitic clay, water glass at its outside surface, the content of graphite at the content of 80-95%, silit at 3-15%, bentonite content at 1-10%, water glass content at 1-10%.It can alleviate the turbid oxidation of gas effectively, resist and wash away, and has isolated the direct effect of molten iron in the regular hour, has delayed the melting loss of protective device and thermopair, even at the cupola furnace place of work under bad environment thermometric, also can reach 25 hours its serviceable life.But this thermopair relatively is suitable for the thermometric that cupola furnace, blast furnace, electric furnace, crucible oven etc. are located; and be not suitable in gas appliance, using in the robot control system(RCS); and the whole protecting device volume is bigger, weight is heavier, temperature difference loss is also bigger; the assembling of protective device and thermopair is general socket connection; accidentally usually can come off in the use; the sleeve pipe of protective device has certain degree of difficulty owing to adopt multiple special composition to make in the making.Developing rapidly along with the combustion gas cause on the other hand, the critical elements thermopair purposes that is used for robot control system(RCS) is more and more wide, in the robot control system(RCS) of whole gas appliance, because thermopair is in the flame of high temperature always, therefore also become the element of the easiest loss, in gas appliance such as gas heating stove, other parts are also not bad, because the damage of thermopair may make scrapping maybe of whole combustion gas tool use, this brings very big inconvenience and loss for people's live and work.

The purpose of this utility model is adapted at using in the robot control system(RCS) in the gas appliance with regard to being to provide at above-mentioned prior art present situation a kind of, can increases the service life, the thermopair of light and handy band protective device easy to use.

The purpose of this utility model is achieved in that the thermopair of this kind band protective device; it includes positive pole and negative pole; anodal and negative pole is welded together with welding in the end; it is characterized in that being with metal sleeve, have resistant to elevated temperatures inorganic silicate high-temp glue to be adhesively fixed between metal sleeve and the thermopair at the head of thermopair.

Above-mentioned positive pole and negative pole wherein a utmost point are made plug, and an other utmost point is made the tubulose of hollow, are undergauges at head position, and cooperate socket with plug, and metal sleeve is limited in the position between position and termination of contracting simultaneously.

The thermopair of the utility model band protective device is owing to adopt metal sleeve to be bonded in the head of thermopair; be more suitable on gas appliance, using; and sleeve pipe is made easily; metal sleeve is to be bonded on the thermopair; can not come off easily; use more convenient; whole thermopair volume is little; in light weight; can prolong the mission life of thermopair in thermal-flame effectively; generally can improve its serviceable life 3-5 doubly, and cost is more about 4% than only having increased originally, so very be adapted at promoting the use of on the gas appliance.

Description of drawings.

The thermocouple structure synoptic diagram of Fig. 1, the utility model band protective device.

Below in conjunction with description of drawings embodiment of the present utility model is described in further detail.

As scheme institute and look; the thermopair of this band protective device; it includes positive pole and negative pole; positive pole and negative pole wherein a utmost point are made plug 2; an other utmost point is made the tubulose 1 of hollow; at head position is undergauge; and be engaged in head with plug 2 and connect together; anodal and negative pole is welded together with welding in the end; head at thermopair is with resistant to elevated temperatures alloying metal sleeve pipe 3; alloying metal sleeve pipe 3 only is limited in position between undergauge position and the termination, can alleviate the volume and weight of protective device like this, has resistant to elevated temperatures inorganic silicate high-temp glue 4 to be adhesively fixed between metal sleeve and the thermopair; this high-temp glue is high temperature resistant to reach 1460 ℃; and play heat transfer; fill; fixing effect generally can not come off protective device and thermopair easily, uses more convenient.Thermopair after the improvement is when work, the direct burnt together gold of flame sleeve pipe, heat passes to welding position anodal and negative pole by alloy sleeve and high temperature glue-line, welding point is no longer directly accepted the heating of thermal-flame, therefore not easy consumption is put in welding, can keep the welding structure of long period, thereby guarantees the existence of thermoelectric force, can prolong the serviceable life of in thermal-flame, working effectively, be adapted at promoting the use of on the gas appliance.

Claims

1, a kind of thermopair with protective device; it includes positive pole and negative pole; anodal and negative pole is welded together with welding in the end, it is characterized in that being with metal sleeve at the head of thermopair, has resistant to elevated temperatures inorganic silicate high-temp glue to be adhesively fixed between metal sleeve and the thermopair.

2, thermopair as claimed in claim 1, it is characterized in that described positive pole and negative pole wherein a utmost point make plug, an other utmost point is made the tubulose of hollow, is undergauge at head position, and cooperating socket with plug, metal sleeve is limited in position between undergauge position and the termination simultaneously.