RU21395U1 - HEAT FIRE DETECTOR - Google Patents

Description

TAGSHYOZHYUZHENNYE DETECTOR Utility model relates to heat detectors for

with a fire alarm and automation system designed to work in difficult conditions) 1x - for example, in rooms with explosive and / or aggressive atmosphere.

A well-known thermal fire detector containing an open, receiver in the form of a radiator, an integrated element with a map-controlled contact seal, a thermomagnet friction core and a permanent magnet (AS USSR No. 1244686, class MKI S08B17 / 06, publ. 15.07.19) .

This detector has the highest reliability of early detection of changes in the surrounding air, but it cannot be used in conditions of exposure to an aggressive and explosive atmosphere, which limits the use of this detector.

The most vague analogue of the declared detector in terms of the number of common features is the thermal announcer, which is different in ac. USSR No. 1795492, class C08 B17 / 06, publ. 02/15/1993, and containing a sealed KOpjiyc in the form of terminal kings with a | x 1shka, having cable views and a temperature probe, in which there is a Fsvigelny element, an electrical unit (connected to the terminals of the box.

However, despite the high functional reliability of the device, the performance of this ignition gel is unacceptable, which is explained as being very large.

  MPK7S08V17 / 06

tbshyuvosshshashchaya part of the body, defining a different system, and a low value of the specific area indicator E1goy frequent, the highest heat loss from the sofuzhakyatsy red

In order to solve the problem of increasing the thermal fire performance, it is possible to use a hermetic case with a terminal box (6-6 short-circuit 1FISHKI, cable glands, etc.) power11 in which the thermocouple is spilled; in the form of a sealed thermosensitive muffler, a thin-walled sleeve is placed inside the horseway, outside of it is a developed thermowell {which understands the surface in the radiator, the heat-sensitive element is mounted in the pusza; which I am pressed into the radiator, and the axial working surfaces of the radiator and axial emphasis of the pusher are clamped by the inserted proximal vortex-tufter, the part of which is thermally insulated from the radiator and the sleeve, tartlor, by means of inserted gaskets and / or radial ones. To enhance this result, it is advisable to perform the radiator fins in black. It is also advisable to carry out the radiator cavity (1);

techno-kmgichnos1 construction facilitating assembly of the unit. The utility model is illustrated by hr, where: in FIG. 1 depicts a housing with a urine-sensitive head; in FIG. 2 is a sectional view of a case with a heat-sensitive probe in FIG. 1; Izvestatol consists of the Efyunyeprsvtschaemoy case 1 with kryppsoy 2,

heat-sensitive gaskets 3 and two cable inputs 4 with contact clips 5. Fasten the pins 3 by screwing them in: you must be connected to the bottom of the cfpus and heat-insulated from them; in which the thermosensitive element 7 is installed (predominantly, digital thermometer). The findings of the thermo-sensing element EGt 7 are connected by electrical wires 8 to the contact clamps 5 and flap compound 9.

The operating principle of the notification is based on the constant monitoring of the TeMnqmiypu O1 drying medium using a thermocouple element 7, made in the form of a MmqpcnpoiteccopHoro thermometer, which I plug into the sleeve 10, which has axial thrust 11 in the inward radial protrusions, and 3 is mounted time (thermal inertia), the head is filled with a developed heat-absorbing surface in the form of a radiator 12, whom (it is insulated from a co-operative cfpus. It is advisable to make the radiator fins 12 black, which improves the conditions of the transmission. T) the urine element 7 is in direct thermal contact with the sleeve 10 and, accordingly, with the radiator 12, by installing a sleeve 10 in the last fitting with guaranteed interference, for example, pressure. This is advisable (according to the conditions of manufacturability of the design), the radiator is 12 with a through cavity, and the sleeve 10 is in the form of a glass with a blind end wall, covered with bunk. Heat-insulating flaps 6 are in contact with the end parts 13 of the intermediate BiynKH 14 clamped in the axial direction

I am tertz 15 radii 12 and axial stop 11 of the sleeve 10, providing tepp (jupyat the sleeve 14 from the sleeve 10 and the radiator 12. Fortunately, the two instructions for assembling the assembly are carried out one-time with the fitting of the sleeve in the inner nonocib of the rod, the first one is pressed in between bushings 14 and thermo-insulating gaskets 6. Then, thermo-gel elements 7 with wires are introduced into the cavity of the casing, then the thermowells 10 are washed down with a compound to obtain the design of the urine-lance head in the form of a single part (non-analysis connection).

The operation of the inventive detector does not fundamentally differ from the operation of similar devices and is carried out as follows. With increasing ambient temperature, the heat flux is perceived mainly by the head 3, which has a developed heat-absorbing surface (radiator), and at the same time low mass, which increases the speed of the detector and reduces its inertia. The perceived heat is transferred from the radiator 12 to the heat-sensitive element 7 through the walls of the sleeve 10 with minimal thermal resistance. Thermal insulation of the radiator 12 from other parts of the unit, and primarily from the massive body 1, allows you to direct almost the entire heat flux to element 7, enhancing this effect, as well as blackening of the radiator fins.

Thus, the lightweight technological K (the construction of the thermosensitive head provides protection of the microprocessor under the influence of aggressive qdeq, improving the heat transfer conditions, increases the speed of the illuminator with a simultaneous decrease in inertia.

/ {IM5

Claims (6)

1. Thermal fire detector comprising a sealed enclosure with a terminal box, cable entries and a hollow probe, in which a thermosensitive element is located, electrically connected to the terminals of the box, characterized in that the probe is a sealed thermosensitive head attached to the housing, which has a developed heat-sensing outside a surface in the form of a radiator, while inside the head there is a sleeve having an external axial stop, and a heat-sensitive element is placed in the cavity of the sleeve, otorrhea mounted in the head with the provision of a thermal contact with the latter, and between the end face of the sleeve and the axial stop facing the end surface of the head body is sandwiched intermediate sleeve, thermally insulated from the head and sleeve.  2. The detector according to claim 1, characterized in that the intermediate sleeve is thermally insulated from the radiator and the sleeve by means of inserted heat-insulating gaskets located on the end surfaces.  3. The detector according to claim 2, characterized in that the intermediate sleeve and the sleeve are mounted with a guaranteed radial clearance.  4. The detector according to claim 1, characterized in that the axial stops on the sleeve are made in the form of an annular radial protrusion, the working end surface of which interacts with the corresponding end surface of the sleeve.  5. The detector according to claim 1, characterized in that the cavity in the radiator is made through, and the sleeve is made in the form of a glass with a blank end wall. 6. The detector according to claim 1, characterized in that the radiator fins have a black surface.