KR20010081344A - Leak of differential motion fire detector - Google Patents

Abstract

PURPOSE: A leak of a differential fire sensor is provided to use a leak ordinarily by producing the standardized products with a mechanical processing method by simpleness and minuteness. CONSTITUTION: The leak of the differential fire sensor includes a leak screw portion(110), a leak groove(120), a supporting face(140) and a leak packing(150). The leak groove(120) of the screw type is formed on the outer circumference of the leak screw portion(110). The leak screw portion(110) is inserted into the leak packing(150), in which a leak inserting hole(150) is formed. And the air outflow is carried out by the leak groove(120). A safe installation face(152) is located on the supporting face(140). An air outflow mouth(151) and an air outflow hole(153) are installed in the leak packing(150) for protecting the leak groove(120).

Description

Leak of differential motion fire detector

The present invention relates to a leak of a differential fire detector.

Generally, a fire detector attached to a ceiling or a wall to detect a fire such as a building is classified into a differential, constant temperature, ionized, and photoelectric type according to a structure, and the differential fire detector detects a change in temperature when a fire occurs. As a means to use the air expansion pressure of the sealed air chamber is divided into a spot type and a distribution type according to the formation method of the air chamber.

In detail, the spot type for detecting local heat changes is formed in a container-type air chamber, and the distributed type detector for detecting thermal changes in a distributed area is provided with an airtight air pipe installed in the sensing area. Use air expansion pressure.

The distributed differential fire detector is the same principle as the spot differential fire detector, so the description is limited to the spot type fire detector and collectively referred to as differential fire detector.

The differential fire detector is composed of a thermal sensing unit for switching the contact by the thermal effect, and a base for converting the thermal effect detected by the thermal sensing unit into a predetermined signal and transmitting it to the alarm device.

And the sensing part of the fire detector is coupled by the attachment terminal la and the holding terminal 2b of the base 2 attached to the ceiling surface as shown in FIG.

The base 2 to which the heat sensing unit is attached is provided with a power line input / output unit c on one side of the holding terminal 2b to provide a wiring binding structure, and the Korean Utility Model No. 073977 registered by the present applicant regarding the wiring binding structure. Explained by reference, and since there is no direct relationship with the present application, detailed illustration and description are omitted.

Briefly describing the structure of the differential fire detector, a portion of the sealed air chamber is attached with a diaphragm capable of driving the contact point by receiving the expanded air pressure.

In addition, the bottom of the diaphragm is provided with a movable and fixed contact point, and the electrical circuit is configured as a result of being switched on by the diaphragm.

Referring again to the configuration and leakage of the differential fire detector through the prior art Fig. 7 as follows.

As shown in FIG. 7, the leak 500 formed by penetrating the leak hole 501 is inserted into the leak insertion hole 551 of the leak backing 550 and installed in the inner chamber bar 531. Chamba 531 is attached to the diaphragm (533) to form an outer chamber bar 530 and the air chamber.

The formed air chamber is inserted into the fixing bolt 532 through the insertion hole 542 is fixed to the charm bar plate 540 by a fastening nut 590 and the charm bar plate 540 is movable contact point 520 and a fixed contact point ( The bolt 580 is inserted into the insertion hole 541 through the 510 and is fixedly installed by the nut part 571 of the attachment terminal 570.

The differential fire detector installed as described above is transferred to the movable contact point 520 through the diaphragm 533 to switch on the fixed contact point 510 to generate a fire alarm.

Leak, an important component of the differential fire detector, is used to prevent malfunction by leaking the expansion pressure of air to the outside of the air chamber when the ambient temperature rises during non-fire. It is used in all kinds of differential fire detectors.

In other words, in order to solve the accumulation of the expansion pressure of the air due to the thermal change in the case of non-fire, an air outlet is required in the air chamber, and a leak is used.

The leaks currently in use are glass rods with capillaries of approximately 0.1 mm.

The critical decision of the leak is determined by the air flow rate according to the size of the hole and the length of the hole, and the flow rate should be suitable for the test conditions for normal operation.

Differential fire detectors operate when the ambient temperature rises above a certain rate of rise.In the test method, a step rise operation test, a linear rise operation test, and a step rise non-operation test, which calculate the operation time according to the temperature change under the condition of the specified temperature and wind speed. There is a linear rise suboperation test.

In more detail, the staircase lift operation test should be operated within 30 seconds by applying it to a vertical airflow at 20 ° C higher than room temperature and having a wind speed of 70cm / s.

In other words, differential fire detectors should be installed in accordance with all the above test conditions to prevent malfunctions and malfunctions.

In other words, it is essential to control the spacing of the contacts suitable to the test conditions and to use the appropriate leaks, and after the installation, the gap between the contacts and the normal maintenance of the leaks must be maintained to be a reliable differential fire detector that eliminates malfunctions and malfunctions.

As described above, conventional leaks are drawn into a glass tube by melting air, drawing it out, and capillary pores formed by the air inside.

However, since the capillary is naturally formed by the air inside by drawing the glass tube, the capillary should be tested before it is used because the size of the hole is not constant due to the degree of drawing, temperature and humidity.

The leak test is carried out by means of a leak tester which is checked for a certain amount of air outflow time under constant air pressure.

And since the leakage of air is influenced by the diameter and length of the hole, the glass tube drawn to about 1m is cut into about 20mm and used as a leak. According to the size of the hole, approximately 20mm or so is inspected with a leak tester to select the good products. In some cases, a defective rate of 50% or more may occur.

In the summer of high humidity in the process of drawing glass tubes, it is impossible to produce in summer, and the failure rate is increased even when considering the failure rate in the drawing process because it is drawn by experience.

In addition, the operator may be injured by the sharpness of the cutting surface in the process of inserting the leak into the leak box to mount the leak, so the jig is used. The leak diameter is about 3mm, and the leak hole is damaged by the broken debris. A blockage can also occur.

When a differential fire detector is attached to the site, the leak hole may be clogged by dust or water vapor.

As described above, the leak, which is a means for preventing malfunction of the conventional differential fire detector, is a problem in the process of drawing a leak hole of about 0.1 mm by drawing a glass tube in the production process and cutting the drawn product about 20 mm in length. There are many difficulties, such as the problem of workability to select the good products through the leak tester and insert the selected leaks into the leak boxing in order to mount the selected good leak on the differential fire detector.

Accordingly, the present invention is to provide a leak that can be used universally by producing a standardized product in an easy and precise mechanical processing method.

In detail, the leak is formed by forming the end portion by punching the tip of the leak spiral portion and the leak spiral portion in which a spiral leak groove is formed by a method of rotating or rolling the outer circumferential surface of a stainless rod having a predetermined length.

Then, the leak backing formed with a leak insertion hole that can closely contact the spiral portion of the leak is molded with rubber, and the leak is inserted into the leak insertion hole. This provides a leak through which the predetermined amount of air can be discharged through the inner circumferential surface and the leak groove of the leak insertion hole through the present invention.

The leak provided through the present invention can be produced without the problem of humidity that is a problem in the conventional leak production environment, and made a standardization that can be produced in a large amount of uniform products by mechanical processing by suitable design value of the leak groove The problem of excessive defect occurrence and the complexity of the inspection process that occurred in the conventional leak can be avoided.

In addition, the leak of the present invention can eliminate the problem of the worker's wound and the breakage of the leak and clogging of the leak hole occurred in the work process to be mounted on the differential fire detector compared to the conventional glass leak.

As described above, through the leak of the present invention, technical problems such as productivity, workability, and durability standardization, which are problems of the leak that are conventionally used, have been solved.

1 is a perspective view of a fire detector to which the present invention is applied

2 is a rear exploded view of a fire detector showing a mounting position of the present invention;

3 is a block diagram of a fire detector equipped with the present invention

4 is a cross-sectional view of a fire detector equipped with the present invention

5 is an embodiment of the present invention

Figure 6 is another embodiment of the present invention

7 is a block diagram according to the leak and the use example of the prior art

※ Explanation of code for main part of drawing ※

1: detection unit 2: base

1a: Mounting terminal 2b: Holding terminal

10: Chamba 20: Diamond Flam

30 Bracket 31: Bracket Support

40: movable contact point 41: movable contact point guide

50: fixed contact point 51: fixed contact point lead

60: fixing plate 61, 62, 63: insertion hole

64 Pilot screw insertion slot 65: Pilot screw

70: Charm bar 71: Insertion groove

72: Charm bar insertion groove 73: Light emitting diode insertion hole

74: leak holder 80: circuit board

100,200,300: Leak 110,210: Leak spiral

120,220,320: Leak groove 130,230,330: Close contact surface

353,140,240: Ground 150,250,350: Leakback

151,351: Air outlet 152,252: Leak insertion

153: air outlet hole 340, 154: seating surface

251: Holding 310: Insertion rod through hole

352: insertion rod

500: leak 501: leak hole

510: fixed contact point 520: movable contact point

530: outboard 531: outboard

532: fixing bolt 533: diaphragm

540: Charm bar 541,542,543: Insertion

550: Leakback 551: Leak insertion hole

552: fixed groove 570: mounting terminal

Exemplary embodiments for realizing the present invention will now be described in detail with reference to the accompanying drawings.

1 is a perspective view in which the detection unit 1 of the leak-equipped differential fire detector of the present invention is separated from the base 2.

The sensing unit 1 is attached to the holding terminal 2b of the base 2 by the attachment terminal 1a and is attached thereto. The holding terminal 2b has an inlet c for connecting the input / output wire to one side thereof. Formed

2 shows a circuit protection cover 90 of a differential fire detector having a leak holder 74 on which the leak 100 and the leak backing 150 of the present invention may be mounted. The sensing unit in which the clipper 92 is deployed is shown.

Figure 3 is a configuration diagram of the detection unit of the differential fire detector made of the configuration of the main components, including the leak of the present invention.

The configuration of the differential fire detector will be described with reference to the configuration diagram of FIG. 3 and the configuration sectional view of FIG. 4 as follows.

The fixed contact table 50 and the movable contact table 40 are soldered and fixed by inserting the contact point leads 41 and 51 into the contact table fixing holes 62 and 63 of the fixing plate 60, and the bracket support 30 is fixed. The bracket 30 is fixed to the fixing plate 60 by being inserted into the insertion hole 61 to fix the solder.

The bracket 30 and the diaphragm 20 in which the contact points 40 and 50 and the fixing plate 60 are integrated are inserted into the insertion grooves 71 of the charm bar plate 70 and fixed by sealing with epoxy or the like.

The Chamba 10 is inserted into the Chamba insert groove 72 to seal and fix with epoxy or the like to form an air chamber together with the diaphragm 20.

The leak holder 74 is installed in a portion of the formed air chamber to insert the leak 100 and the leak backing 150 into the leak chamber.

The circuit board 80 is mounted on the bottom of the chamfer plate 70 to form a circuit, and the light emitting diode 81 is inserted into the insertion hole 73.

The differential fire detector configured as described above constitutes a circuit by driving the movable contact table 40 by the diaphragm 20 which receives the expansion pressure generated by the thermal expansion of the air chamber formed by the chambar 10. Done.

At this time, the inflated air pressure flows out to the outside through the leak groove 120 formed in the leak 100 in order to solve the air expansion pressure according to the change in the surrounding temperature during the non-fire

At this time, the role of the leak groove 120 is very important as a means for excluding malfunctions with the maintenance of a constant contact interval and will be described as follows.

That is, the light emitting diode 81 maintains the state of light emission in the event of a malfunction by a continuous circuit configured on the circuit board 80, thereby providing easy maintenance.

The role of the light emitting diode 81 is not for the alarm but for the maintenance, which may infer the severity of the malfunction problem, and the cause of the problem is the use of the abnormal leak and the change of the contact interval.

Accordingly, the present invention solves the problem of malfunction by providing the leak 100 and the leak backing 150 as shown in FIG.

5 is a configuration diagram of the leak of the present invention that solves the technical problems such as productivity, workability, durability, standardization, which is a problem of the leak used in the conventional differential fire detector as described above.

To describe this in more detail, the leek groove 120 is formed by a lottery or headlamp on a predetermined length of the rod, and one side end of the rod forms a seating surface 140 to form a leak having an end portion.

In addition, the leak inlet 152, the air outlet 151, and the air outlet hole 153 are molded with a rubber of a predetermined length to form the leak backing 150.

As shown in the cross-sectional view, the leak helix portion 110 is inserted into the leak insertion hole 152 to seat the seating surface 154 on the support surface 140.

At this time, the inner circumferential surface of the leak insertion hole 152 is in close contact with the contact surface 130 to induce air leakage from the air chamber to the leak groove 120.

At this time, since the leak groove 120 is formed in a spiral of a constant pitch, the leak resistance of the air can be obtained from the leak spiral portion 110 having a small length when the air is leaked, so that the sensing unit can be slimmed without restriction of the leak spiral portion 110. Can be achieved.

Air leaked through the leak groove 120 is stably discharged to the outside by the air outlet hole 153 and the air outlet 151, and is protected by the support surface 140 and the seating surface 154. 120 can be isolated from the effects of dust, water vapor, etc. to eliminate clogging.

FIG. 6 illustrates an embodiment in which the leak groove 220 formed in the leak 200 is opposite in the helical direction, and the shape of the groove is not circular in comparison with the embodiment shown in FIG. 5 as another embodiment of the present invention. Leak backing 250 is to secure the air outflow path to the outside by installing the support (251).

The leak 300 of another embodiment forms the leak groove 320 on the inner circumferential surface of the hollow round bar and inserts the insertion rod 352 into the through hole 310 by the leak groove 320 as shown in the cross section. An air outlet pipe is secured and an air outlet 351 is installed to stabilize the outflow of air, and the leak groove 320 is protected from dust and water vapor by the support surface 353 and the seating surface 340.

By solving the technical problem, which has been a problem in the leak of the conventional differential fire detector through the present invention, it is possible to standardize the leak and to slim the detection unit.

In other words, the conventional leak requires a pipe length of a constant length according to the diameter of the leak hole because the leak hole is formed through the center of the straight glass rod.

That is, the conventionally employed leaks have a diameter of about 0.1 mm and a length of about 20 mm. In order to reduce the length of the leaks, the diameter of the leak hole must be smaller, but there is a difficulty in processing.

Due to this, the leak length is pointed out as a problem in the design process of the appearance and aesthetically slim detector.

However, since the leak of the present invention adopts a spiral, it is possible to obtain a pipeline resistance that is required even for a small length of the leak rod.

In other words, it enables slim products for the aesthetic appearance of differential fire detectors. By solving the problems as described above and providing a slim product to promote the development of related industries and to ensure the reliability of the product.

Claims (3)

The fire detector, which is switched on by operating the contact point with the expansion pressure according to the thermal expansion of the air by the thermal effect, is installed in a part of the air chamber, and the air leak pipe is installed in a part of the air chamber to solve the expansion pressure of the air due to the temperature change in case of non-fire. In The fire spiral characterized by inserting the leak spiral portion 110 with a spiral leak groove 120 on the outer circumferential surface into the leak backing 150 formed with the leak insertion opening 152 and the air flow out by the leak groove 120 sensor The method of claim 1, wherein the seating surface 152 of the leak backing 150 is installed on the support surface 140 to protect the leak groove 120, the air outlet 151 and the air outlet hole 153 is installed. Featuring a fire detector. According to claim 1, the insertion rod 352 formed in the leak backing 350 is inserted into the insertion rod through hole 310 of the leak 300, the leak groove 320 is formed on the inner circumferential surface of the hollow round bar and the leak hole 320 Fire detector characterized in that the outflow of air by.