CN2103135U - Tile thermometric element - Google Patents

Abstract

The utility model relates to a tile temperature measure element, which is used for the temperature measure of bearing bushes, etc. in a heating control system. The structure of the traditional tile temperature measure element is changed, and a thermal resistor 20 contacts with the outside by copper materials. The time constant is reduced. The utility model relates to the integral sealed structure, and the oil-water insulating performance is good. The utility model uses the pressboard spring type installation structure and has the advantages of firm and reliable installation and high shock resistance of the elements.

Description

Tile thermometric element

The utility model relates to a kind of temperature element, is used for the temperature survey of heat control system intermediate bushing, thrust bearing shoe valve, guide shoe etc.

The WZG-001 that present China generally uses and the structure of WZG-010A type tile fragment temperature element are as shown in Figure 1.It is characterized by: envelope curve formation thermal resistance 7 is dyed in coiling on the plastic cord skeleton 6, in its bronze medal boiler clothing 8 of packing into, and oral area epoxy resin 5 sealing, thermal resistance two extension lines 11 stretch out outside the copper sheath by reinforced insulation pipe 4, and it can weld with outside line 1.During use, in the gaging hole 9 with whole temperature element insertion tile fragment 10, with the extension line clamping, the folder sign indicating number is fixed on the gaging hole tile fragment on every side by securing member 3 by a folder sign indicating number 2.In actual use, this tile fragment temperature element exists following weak point.

1, in actual use, cooling, lubricating oil is moisture sometimes, and the profit thing will enter gaging hole 9, infiltrate in the copper sheaths 8 by reinforced insulation pipe 4, form profit thing layer, can cause the short circuit of thermal resistance circuit, cause the temperature element operational failure.

2, since the gaging hole 9 in actual the use generally greater than the about 1～2mm of temperature element copper sheath 8 diameters; therefore the vibration of main equipment will cause the continuous and gaging hole wall bump of temperature element; usually make the circuit or the solder joint shake of temperature element inside disconnected; with the megawatt generating plant is example; this type of failure rate is about about 40%; cause and shut down maintenance, reduce productivity effect greatly.

3, owing to adopted the plastic cord skeleton, thermal resistance is poor with extraneous heat transmissibility, so the time constant of this temperature element is relatively large, allows time constant generally at 90 seconds.Because time constant is big, after often the temperature on the workplace of tile fragment had surpassed the critical temperature quite a while that allows, temperature element just reflected the value that transfinites, and will cause tile fragment workplace scaling loss like this.Therefore this temperature element can not satisfy the ask for something of modern production.

4, adopt the folder coding mode that extension line is fixed.Because the general sheet copper that adopts of folder sign indicating number is made, its clamping force is little, and long-time running work will make the plastic packets point sheath of extension line clamping place come off, thereby cause the extension line wearing and tearing, make line short or open circuit.

The purpose of this utility model just is to overcome above-mentioned weak point of the prior art, and a kind of insulation, antidetonation, performance is good, time constant is little, solid and reliable tile fragment temperature element are provided.

The purpose of this utility model can reach by following measures: the last coiling enameled wire of copper line skeleton forms thermal resistance, in its copper sheath of packing into, one end of copper line skeleton and the welding of the top end face of copper sheath, the other end is clamped in the copper sheath inwall by a chuck, the thermal resistance extension line adopts whole of the bifilar king's of moulding RVV to draw, RVV is inner to adopt binding to fasten at the chuck two ends, and soak insullac and adopt epoxy resin the sealing of copper sheath mouth, the temperature element head that combinations thereof becomes is packed in the gaging hole of tile fragment, spring on the RVV is pressed in the temperature element head in the gaging hole, the other end of spring contacts with a pressing plate, and pressing plate is fixed on the tile fragment by securing member.

Below in conjunction with drawings and Examples the utility model is further described.

Fig. 2 is a structural drawing of the present utility model.Enameled wire is wound on formation thermal resistance 20 on the copper line skeleton 21, in its copper sheath 19 of packing into, one end of copper line skeleton and the top end face of copper sheath weld together, the copper product that makes thermal resistance pass through good heat-transfer like this contacts with extraneous, thereby can reduce the time constant of whole temperature element; The other end of copper line skeleton is clamped in the copper sheath inwall by a chuck 17, thereby makes thermal resistance firmly be fixed in the copper sheath; The thermal resistance extension line adopts 13 whole of the bifilar king's of moulding RVV to draw, and RVV is inner to adopt binding 18 to fasten at the chuck two ends, and soaks insullac, and the copper sheath mouth adopts epoxy resin 16 sealing, thereby makes the profit thing be difficult to enter copper sheath inside; During use, the temperature element head that combinations thereof is become is packed in the gaging hole 9 of tile fragment 10, and the spring 15 on the RVV is pressed in the temperature element head in the gaging hole, and the other end of spring contacts with a pressing plate 22, and pressing plate is fixed on the tile fragment by securing member 14.Like this, whole temperature element is pressed in the gaging hole of tile fragment securely, makes the vibration of main equipment can not cause the bump of measuring sensor in gaging hole.

Compared with prior art, the utlity model has following advantage:

1, profit good insulation preformance.

2, temperature element tightly is pressed in the gaging hole of tile fragment, and the anti-seismic performance of element is good, the reliability height.

3, adopt copper line skeleton and, reduced the time constant of temperature element, experiment showed, that its permission time constant is about 10 seconds itself and the welding of copper sheath top end face.

4, install firmly, can not cause the extension line wear phenomenon.

Claims (1)

1, a kind of heat control system intermediate bushing that is used for, thrust bearing shoe valve, the thermometric tile fragment temperature element of guide shoe etc., by thermal resistance, copper sheath, compositions such as stationary installation, it is characterized in that: the coiling enameled wire forms thermal resistance 20 on the copper line skeleton 21, in its copper sheath 19 of packing into, one end of copper line skeleton and the welding of the top end face of copper sheath, the other end is clamped in the copper sheath inwall by a chuck 17, the thermal resistance extension line adopts 13 whole of the bifilar king's of moulding RVV to draw, RVV is inner to adopt binding 18 to fasten at the chuck two ends, and soak insullac, adopt epoxy resin 16 with the sealing of copper sheath mouth, the temperature element head that combinations thereof becomes is packed in the gaging hole of tile fragment, spring 15 on the RVV is pressed in the temperature element head in the gaging hole, and the other end of spring contacts with a pressing plate 22, and pressing plate is fixed on the tile fragment by securing member 14.

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