FR2611311A1 - High-temperature thermal probe device - Google Patents

Abstract

The subject of the invention relates to a high-temperature thermal probe device. It consists of a combination of a thermo-contact assembly 8, 9 and with the transmissions 5, 11 controlling a breaker switch firstly with a heat-retractable enveloping sheath 2 and then with high-temperature wiring 12. It is intended for the automatic regulation of heating appliances and allows incorporation in any recuperator through its thermal protection system and its wiring which are allied to the simplification of its elements, increasing the duration of use and the reliability thereof.

Description

 The object of the invention relates to a high temperature thermal probe dis2osltlf.

 I1 are intended for the automatic regulation of the heating fittings and allows to integrate into all recuperators by its thermal protection system, its setting combined with the simplification of its elements increasing the duration of use and its reliability.

 I1 is known to use thermal probes or thermocontact with bimetal sensors whose deformation ensures the openings or closings of circuits, but these devices can not be used for high temperatures exceeding 3305 due to the disintegration of the elements subjected to tnermic effects ce which distorts their operation and the transmissions reduces their reliability and results in rapid decommissioning.

 The device according to the invention eliminates these drawbacks by the positioning of its sensor and transmission elements as well as by their simplification ensuring the instantaneous nature of the control by eliminating any possibility of stopping by its thermal insulation, its refractory resistance, the insulation of the box containing the moving parts and finally by the high temperature wiring preserving the sensitivity of the thermal sensor.

 It is made up of the ccr.:binaisen of a thermocontact and transmission assembly controlling a switch first with an enveloping heat-shrinkable sheath and then with high temperature wiring.

In the accompanying drawings, given by way of nonlimiting example, of one of the embodiments of the subject of the invention
Figure 1 shows the probe or thermal switch with its heat-shrinkable sheath seen in longitudinal section.

 Figure 2 shows the deformation of the bimetal sensor.

 FIG. 3 is a view of the probe as a whole seen in elevation.

 Figures 4, 5 show various applications.

 FIG. 6 represents a control circuit for the thermal switch.

 The probe or thermal switch consists of a housing 1, fig 1, made of refractory material with heat-shrinkable sheath 2 molded the entire ceramic housing 1 with an open base receiving a flange 3 comprising an axial vertical bearing 4 formed by a hole in which slides the transmission shaft 5 supporting at its upper part a bracket 6 carries contact 7.

 The open base is closed by a bimetallic metal disc 8, (fig 1, 2) whose concave face is in contact with the transmission rod 5.

 The upper part of the case contains a lamellar contact 9, the bending of which 10 is fixed by the part 11 constituting a connection sleeve with the line 12 while the end 13 produces a contact pad closing or opening the circuit.

 This metal disc ö under the effect of temperature passes from the concave state S, FIG. 2, to the convex state 14.

 This deformation drives the drive shaft 5 which via the lamella 9 opens or closes the electrical circuit.

 The disc 8 is maintained in its functional position by the capsule 15.

 The cabal 12 is sheathed by a high temperature refractory fireproof protective lining 16 and connected to the sheath 2.

 A thermal sensor or thermo contact conductor connection 17 extending by a heat conductive threaded rod 18 completes this one-piece assembly, fig 3.

 This thermal contact plate against the wall 19 of a chimney or other hot air duct by a hole 21 so that the rod 18 forms an overhang whose surface is increased by the bolt 22 which is also used for stabilizing its positioning .

 This probe can be placed on domestic chimneys as well as on gas and smart gas evacuation pipes from factories such as ceramic kilns, brickyards, pasta factories, etc., and this, as well on main pipes. 23 only on deflections of hot air outlet 23 '.

 The circuit can be formed, FIG. 6, by the line 24, the probe 1, constitutes a switch opening and closing the circuit 20, 27 of the turbine 25, or of any signaling control device or of heating regulation, in order to obtain operation at preset temperatures.

 It is possible to ensure total automatic control and cause, as necessary, both a shutdown of heating with, if necessary, the switching on of a refrigerator or its restarting at a pre-set temperature.

 The protective sheath 2 allows installation on all circuits at very high temperatures, avoiding damage to the transmission members and ensuring their longevity of use with increased reliability.

 However, the shapes, dimensions and arrangements of the various elements may vary within the limit of the equivalents, as moreover the materials used for their manufacture without changing the general design of the invention which has just been described.

Claims (3)

 10 A thermal or high-temperature probe device having for its object the first conibination of a bimetallic strip thermal switch and its control transmission assembly in its refractory box protected by a heat-shrink tubing.  table and its thermal sensor, then high ground wiring? erature allowing implantation on circuits of more than 3000 avoiding deformation and malfunctions while extending its duration characterized by a housing (1) covered by a heat-shrinkable sheath (2) with line wire  (16) protected by a refractory lining with material resistant to very high temperatures, while the bila :: disc cannot be deformed  (8) under the effect of a thermal sensor (17) extended by a conductive threaded rod (18) passing through the wall (19) of a chimney and stabilized by a nut (22) itself constituting a collection mass in direct contact with the thermal stream of hot air to be checked.  20 Device according to claim 1 characterized in that the thermal sensor allows adjustment of the triggering of the control which transmits 1 i: npulsion by a bimetal membrane (8) a transmissive shaft t5) secured to a bracket (6 ) contact carrier (7) acting on a switch formed by a flexible blade (9) with elbow (10) ensuring its attachment to the connection sleeve (11) with the line (12) all comprising an isothermal assembly for thermal protection high temperature.  30 Device according to claim 1, characterized in that the thermoswitch (1) is fixed on a chimney wall (19) or any hot air duct (23 ') so that the thermal sensor (17) presses against the hot wall, while the rods (18) and bolts (22) increase the high temperature thermal capture surfaces.  40 Device according to Claim 1, characterized in that the probe or thermo-conduit (2) is placed on a liana (24) connecting it with the turbine (25) or control receiver in order to open or close the circuit (26 , 27).