JPH04124169U - Joint for differential type distributed sensor - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the joint used to connect the air pipe installed in the fire prevention compartment and used for fire detection to the detector. [Structure] Air pipes are installed in a wide range of fireproof areas, and when the ambient temperature rises rapidly, the expansion of the air inside the air pipes is transmitted to a detector to notify the occurrence of a fire. When installing the air pipes, joints are used instead of soldering to connect the air pipes to each other and to connect the air pipes to the detector, so there is no need to apply corrosion prevention treatment to the connecting parts, making construction quick and safe.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

For example, this idea is based on the air pipes installed in fireproof compartments and the air inside the pipes when a fire occurs. For differential distributed type sensors that are activated by thermal expansion and connected to a fire alarm detector. This article relates to the improvement of joints, especially joints for connecting air pipes.

0002

[Conventional technology]

Differential distributed type detectors are equipped with air pipes installed in fireproof areas over a wide area, and are designed to prevent fires occurring in the surrounding area. When the ambient temperature exceeds a certain temperature rise rate, the air in the air tube expands and the detector is Activate to notify the occurrence of fire.

0003 Figure 4 is a cross-sectional view showing an example of a conventional differential distribution type sensor joint, an automatic fire alarm system. Preparations will be carried out in accordance with the standards of the Fire and Disaster Management Agency. 2 is an air pipe, and 20 is a connecting pipe. fire prevention district The air pipes 2 laid across the entire area are interconnected to ensure the specified length. This is done by soldering using the connecting tube 20. When soldering, make sure that the air pipe 2 Polish the ends and apply lead solder, then insert the air pipe 2 from both sides of the connecting pipe 20. The work is carried out after polishing the surface of the connecting pipe 20. Corrosion etc. on the connection part after soldering Painting is applied to prevent the occurrence of In addition, if air pipe 2 is a vinyl-coated pipe, the connection Cover the connecting part with vinyl tube.

[0004] FIG. 5 is a side view showing an example of an air pipe, and FIG. 6 is a front view of FIG. Support, 2 1 is a wire. A thin copper tube with an outer diameter of 2.0 is used as the air tube 2, and a wire 21 is attached to fix it. It is specified that the air pipe 2 is used at a maximum length of 100 m and has an exposed length of 20 m or more. In addition, a messenger wire attached to the air pipe 2 and fixed at key points with a bind wire is used.

[0005]

[Problem that the idea aims to solve] With the conventional differential type distributed sensor joints as described above, the differential type distributed type sensor has a wide It is applied to fire prevention divisions, and air pipes 2 are installed throughout the fire prevention division to detect fire. . These air pipes 2 are connected to other air pipes 2 and inspected to ensure the specified length. connected to the output device. For the above connection, soldering using a connecting pipe 20 is used. Before soldering, the ends of the air pipe 2 and the surfaces of the connecting pipe 20 must be polished in advance, and the ends must be pre-polished. Preparatory soldering is applied, but these operations take time. Soldering iron for soldering It is dangerous because it requires a separate power supply and the work is done at high places and in dark and poor conditions. Efficiency decreases.

[0006] After soldering, apply paint or wrap vinyl tubes on the connecting parts to prevent corrosion. must be coated with Furthermore, after connection, solder leaks into the small diameter air pipe 2. Conduct a distribution test to check for clogging due to leakage or water droplets. Use of scrap materials must be performed by experienced technicians to ensure quality soldering. There was a problem with becoming.

[0007] This invention was made in order to solve this problem, and the air pipes 2 are connected to each other. Scrap materials can be used to connect the detector and air pipe 2 without soldering. A differential distribution type that allows for quick and safe installation of air pipes 2 over the entire wide fireproof area. The purpose is to obtain a joint for a sensor.

[0008]

[Means to solve the problem]

The joint for a differential type distributed sensor according to this invention has an air pipe insertion hole in the center. It consists of a cylindrical body with a screw on the outer circumferential surface and a soft metal member, into which an air pipe is inserted. An annular seal and a screw for inserting an air pipe into the seal and tightening it to the body are installed. It is equipped with a fixture that connects the trachea to the body in an airtight manner.

[0009]

[Effect]

In this design, it is used to connect air pipes to each other and to connect the detector and air pipes. The fitting has an air pipe insertion hole in the center and a threaded outer surface with a seal inside. When the set fixture is tightened to the body, the soft metal seal deforms and the air pipe is connected. It is fixed to the hand, and the air tube and body can be airtight. Insertion hole passing through two air pipes Connect the air pipes by inserting them into the body and tightening the fixings with internal seals from both sides of the body. can be made airtight. In addition, a detector was installed on one side of the body and a seal was installed on the other side of the body. When the fixture is tightened, the connection between the detector and the air pipe can be made airtight.

0010 Since soldering is not used for the above connections, polish and guide the parts to be soldered. The soldering process and the power supply for the soldering iron can be eliminated. Also, corrosion of the connection part There is no need to apply paint or cover the vinyl tube to prevent this, simplifying the construction process. can. The fitting consists of a body, a seal, and a fixture and does not use a power source, so it is possible to connect air pipes to each other. Connection and connection work with the detector is easy, so it can be used even in high places. It can be done quickly and safely. Therefore, the differential type distributed sensor applied to wide fire protection areas The air pipes used in the heat receiving section can be easily made of offcuts to ensure the specified length. Can be done.

[0011]

【Example】

An embodiment of this invention will be described in detail with reference to the accompanying drawings. Figure 1 is a sectional view showing an embodiment of this invention, 2 is the same as the conventional joint described above, 1 is a joint, and 3 is a body with an insertion hole for the air pipe 2 in the center and a thread on the outer circumferential surface. , 4 is a fixture attached to the body 3, and 5 is a seal. In the joint for a differential type distributed sensor configured as described above, a seal 5 and a fixture 3 are arranged on both sides of the body 2, and air is inserted into the insertion hole of the body 2 so as to be slidable from both directions. The tube 2 is inserted and its ends are positioned within the respective insertion holes.

[0012] When the fixture 3 in which the seal 5 is installed is fastened to the body 3 from both directions, the seal 4, which is made of a soft metal member such as aluminum, deforms and is pressed against the air pipe 2. Mutual connections can be made airtight. As described above, the air pipes 2 can be easily and quickly connected to each other using the two sets of joints 1 without using a soldering iron or the like.

FIG. 2 is a sectional view showing another embodiment of this invention, and is an example of how the air pipe 2 is connected to the sensor. Reference numerals 2, 4, and 5 are the same as in the above embodiment, and 6 indicates a one-way body having a screw provided only on one side of the outer peripheral surface. The one-way body 6 has an insertion hole so that the air pipe 2 can be inserted only from one side, and a detector etc. is provided on the other side. When the air pipe 2 is inserted into the insertion hole of the one-way body 6 and the fixture 4 with a seal 5 made of aluminum or the like inside is fastened to the one-way body 6 from this direction, the seal 5 made of a soft metal member is inserted. In this modification, the detector and the air pipe 2 can be airtightly connected using a pair of joints 1 .

FIG. 3 is a piping diagram showing an example of the application of this invention to a multi-story parking lot, in which 10 is a multi-story parking lot, 11 is a heat receiving part consisting of air pipes 2 provided throughout the fire prevention area, and 12 is a fire prevention part. 13 is a cock stand for switching the passage of the air pipe 2, 14 is a cock handle, 15 is a test hole for supplying test air, 16 is a leak hole, 17 is a diaphragm, and 18 is a contact point.

[0015] A differential distributed type sensor is used to detect a fire that occurs in the multi-story parking lot 10, which has a standard height of about 30 m. The air pipes 2 are arranged in multiple stages throughout the fireproof compartment so that the heat receiving section 11 of the sensor can detect the rate of increase in ambient temperature. The air pipe 2 of the heat receiving section 11 is connected to the cock stand 13 of the detector 12 , and by switching the cock handle 14, one end is connected to the diaphragm 17 and the other end is connected to the leak hole 16.

The diaphragm 17 does not operate because the pressure escaping from the air leak hole 16 due to the expansion and contraction of the air in the air pipe 2 due to normal changes in ambient temperature within the multi-story parking lot 10 is in equilibrium with the atmospheric pressure. However, if a fire breaks out in the multi-storey parking lot 10 and the rate of increase in ambient temperature increases, and the air inside the air pipe 2 expands and the amount exceeds the amount of leakage from the leak hole 16, the amount of air inside the detector 12 will increase. The diaphragm 17 is activated and the contact 18 is closed, thereby transmitting the occurrence of a fire. Further, by operating the cock handle 14 to switch the cock stand 13 and supplying air from the test hole 15, the operation of the diaphragm 17 can be tested.

As described above, the fixtures 4 and seals 5 constituting the joint 1 are provided on both sides of the body 2 to interconnect the air pipes 2, and the fixtures 4 are fastened from both sides of the body 2. In addition, to connect the detector 12 and the air pipe 2, the detector 12 is provided on one side of the one-way body 6, and a seal 5 constituting the joint 1 is installed on the other side of the one-way body 6, and a fixture 4 is installed. They can be connected together airtight by simply tightening them. Moreover, since no special tools or power sources are used, construction work can be carried out quickly and safely even at high places within the multi-story parking lot 10. Since soldering is not used, there is no need to apply paint or cover the vinyl tube to prevent corrosion of the connection parts, and furthermore, solder leakage into the air pipe 2 and generation of water droplets can be prevented.

[0018]

[Effect of the idea]

As explained above, this idea is to insert an air pipe into the insertion hole of the body with a screw on the outer circumference. The simple structure of inserting the fixing device with an internal seal and fastening it to the body makes it easy to connect air pipes. Interconnections and connections between detectors and air pipes can be constructed quickly and safely. Connection part The danger of blockage can be avoided. Applying paint to prevent corrosion on connection parts This has the effect of eliminating the need to cover the vinyl tube.

[Brief explanation of drawings]

[Fig. 1] Cross-sectional view showing one embodiment of this invention

[Fig. 2] Cross-sectional view showing another embodiment of this invention

[Figure 3] Piping diagram showing an example of application of this invention to a multi-story parking lot

[Fig. 4] A cross-sectional view showing an example of a conventional joint for a differential type distributed sensor.

[Fig. 5] Side view showing an example of an air pipe

[Figure 6] Front view of Figure 5

[Explanation of symbols] 1 Joint 2 Air pipe 3 Body 4 Fixture 5 Seal

Claims (3)

[Scope of utility model registration request] Claim 1: A differential distributed sensing system in which an air pipe is installed in a fireproof compartment, the air pipe is connected to a detector, and as the ambient temperature rises, the air inside the air pipe expands and activates the sensor to alert the fire. A dexterous joint consists of a cylindrical body with an air tube insertion hole in the center and a screw on the outer circumferential surface, an annular seal made of a soft metal member into which the air tube is inserted, and an annular seal through which the air tube is inserted. A joint for a differential type distributed sensor, characterized in that it is provided with a fixture for airtightly connecting an air pipe and the body, the fitting having the seal therein and a screw for fastening to the body. 2. The joint for a differential type distributed sensor according to claim 1, wherein the body can be fastened with a fixture having a seal therein from both directions. 3. The joint for a differential type distributed sensor according to claim 1, wherein the body can be fastened with a fixture having a seal therein from one direction.