Air suction type air sampling smoke alarm system

Abstract

The utility model discloses an air-breathing type air sampling smoke alarm system, which comprises an air-breathing type detector, a plurality of air sampling pipes communicated with the air-breathing type detector, an air pump, a first main pipe, a first branch pipe, a normally open electromagnetic valve and a control box, the air sampling pipe purging device has the advantages that the air pump, the first main pipe, the first branch pipe and the control box are matched, when the air sampling pipe needs to be purged, the control box controls the air pump to be started at regular time, the normally-open electromagnetic valve to be closed, and then the first valve is opened; high-pressure air flows into the air sampling pipe needing to be purged through the first main pipe and the first branch pipe to purge dust in the pipe, so that the air suction type air sampling smoke alarm system can be effectively and regularly cleaned, and compared with a mode of regularly cleaning the air sampling pipe manually, the air suction type air sampling smoke alarm system is simpler and higher in efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of fire early warning, in particular to an aspirated air sampling smoke alarm system. Background Art

[0002] The air sampling smoke warning system is a smoke detection alarm system that uses an air pump to actively draw air samples from the sampling pipe into the laser detection for high-sensitivity detection, and a microcomputer analyzes and judges, thereby early judging whether there is a potential fire. Since the air sampling smoke detection system has the advantages of high sensitivity, wide sensitivity range, flexible installation and easy maintenance, and can be applied to some special spaces that other traditional smoke detection systems cannot effectively protect, it will be more and more widely used in the field of smoke detection.

[0003] The suction air sampling smoke alarm system collects air samples through the sampling holes on the air sampling pipe network, detects them through the smoke detector, and alarms when the smoke concentration reaches the set value. Each smoke detector has its own suction motor, and the airflow in the protected area will carry the air sample into the sampling hole. These air samples are then transmitted to the smoke detector through the air sampling tube. However, after long-term use, the sampling tube of the air sampling smoke alarm system is prone to accumulate dust and even block the sampling hole, so the sampling tube needs to be backwashed to ensure the detection accuracy of the air sampling smoke alarm system. At present, manual methods are generally used to clean the air sampling tube regularly. The operation method is: pull out the air sampling tube from the smoke detector, block the air intake of the smoke detector with a sponge, and pass high-pressure air (about 0.4MPa) into the air sampling tube for about two minutes. This operation method is time-consuming and labor-intensive, and the pipe network is easily damaged after multiple plugging and unplugging. In addition, improper operation by personnel may also damage the smoke detector. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an aspirated air sampling smoke alarm system.

[0005] In order to solve the above technical problems, the technical solution of the utility model is:

[0006] An aspirated air sampling smoke alarm system comprises an aspirated detector, a plurality of air sampling tubes connected to the aspirated detector, an air pump, a first main pipe, a first branch pipe, a normally open solenoid valve, and a control box; the air outlet of the air pump is connected to one end of the first main pipe; the other end of the first main pipe is connected to a plurality of first branch pipes; the number of the first branch pipes is the same as the number of air sampling tubes; a plurality of the first branch pipes are respectively connected to a plurality of air sampling tubes; the air sampling tube is provided with the normally open solenoid valve; the normally open solenoid valve is located on the air sampling tube section between the aspirated detector and the first branch pipe; the control box is electrically connected to the aspirated detector and the air pump, respectively.

[0007] Furthermore, the first main pipe is detachably connected to a first valve.

[0008] Furthermore, the diameter of the first main pipe is greater than the diameter of the first branch pipe.

[0009] Furthermore, the diameter of the first branch pipe is larger than the diameter of the air sampling pipe.

[0010] Furthermore, the diameter of the first branch pipe is 30 mm; the diameter of the air sampling pipe is 25 mm.

[0011] Furthermore, the air sampling tube is connected to a plurality of capillary sampling tubes.

[0012] Furthermore, the lower end of the capillary sampling tube is detachably connected to a sampling head.

[0013] Furthermore, the capillary sampling tube is made of a soft tube.

[0014] Beneficial effects of the utility model:

[0015] By arranging an air pump, a first main pipe, a first branch pipe and a control box for coordination, when the air sampling tube needs to be purged, the air pump is controlled by the control box to start at a fixed time, the normally open solenoid valve is closed, and then the first valve is opened; high-pressure air flows into the air sampling tube that needs to be purged through the first main pipe and the first branch pipe to purge the dust in the tube, thereby effectively enabling the suction-type air sampling smoke alarm system to be cleaned regularly and being simpler, more convenient and more efficient than manual regular cleaning of the air sampling tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0018] In the figure, 1-aspirating detector, 2-air sampling tube, 3-air pump, 4-first main pipe, 5-first branch pipe, 6-normally open solenoid valve, 7-control box, 8-first valve, 9-capillary sampling tube, 10-sampling head. DETAILED DESCRIPTION

[0019] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0020] Reference Figure 1-2 As shown, an aspirating air sampling smoke alarm system includes an aspirating detector 1, a plurality of air sampling tubes 2 connected to the aspirating detector 1, an air pump 3, a first main pipe 4, a first branch pipe 5, a normally open solenoid valve 6, and a control box 7; the air outlet of the air pump 3 is connected to one end of the first main pipe 4; the other end of the first main pipe 4 is connected to a plurality of first branch pipes 5; the number of first branch pipes 5 is the same as the number of air sampling tubes 2; the plurality of first branch pipes 5 are respectively connected to the plurality of air sampling tubes 2; a normally open solenoid valve 6 is provided on the air sampling tube 2; the normally open solenoid valve 6 is located on the section of the air sampling tube 2 between the aspirating detector 1 and the first branch pipe 5; the control box 7 is electrically connected to the aspirating detector 1 and the air pump 3, respectively.

[0021] In the present utility model, the aspirating detector 1 is the full name of the aspirating smoke fire detector, which is a fire warning device. The air in the protected area is sucked into the detector for analysis through the air sampling tube 2, so as to provide early warning of the fire. The air pump 3 can provide high-pressure air for the clean air sampling tube 2. Those skilled in the art can reasonably choose commercially available products for matching use according to the actual scenario; the first main pipe 4 and the first branch pipe 5 can pass high-pressure air into the air sampling tube 2 for flushing; the normally open solenoid valve 6 is in the open state during air detection, which can ensure normal air detection. The control box 7 is a commercially available product. The model used in the present utility model is FMST-FXV-22A. Those skilled in the art can choose according to the actual usage scenario, which is fully understandable to those skilled in the art of the prior art.

[0022] Specifically, in order to prevent gas from entering the air pump 3 from the first main pipe 4 during air detection, the first main pipe 4 is detachably connected to a first valve 8 .

[0023] Specifically, in order to ensure that the air pressure reaches the purge intensity, the diameter of the first main pipe 4 is larger than the diameter of the first branch pipe 5 .

[0024] Specifically, in order to ensure the air pressure, the diameter of the first branch pipe 5 is larger than the diameter of the air sampling pipe 2 .

[0025] Specifically, during use of the present invention, the diameter of the first branch tube 5 is 30 mm; the diameter of the air sampling tube 2 is 25 mm.

[0026] Specifically, in order to facilitate the collection of sample air, the air sampling tube 2 is connected to a plurality of capillary sampling tubes 9 .

[0027] Specifically, the lower end of the capillary sampling tube 9 is detachably connected to a sampling head 10 , which is in direct contact with the collected air and introduces the air into the air sampling tube 2 .

[0028] Specifically, the capillary sampling tube 9 is made of a hose, and the material of the capillary sampling hose should meet the flame retardancy requirement to ensure the safety and reliability of the system when a fire occurs.

[0029] The working principle of this utility model:

[0030] When in normal state, the control box 7 controls the air-suction detector 1 to work; at this time, the air sampling tube 2 is distributed in the area that needs to be detected, and the air is introduced into the air sampling tube 2 through the capillary sampling tube 9 and the sampling head 10. The normally open solenoid valve 6 on the air sampling tube 2 is in the open state, and the sample air enters the air-suction detector 1 for real-time detection. When the air sampling tube 2 needs to be purged, the air pump 3 is controlled by the control box 7 to start at a fixed time, the normally open solenoid valve 6 is closed, and then the first valve 8 is opened; high-pressure air flows into the air sampling tube 2 that needs to be purged through the first main pipe 4 and the first branch pipe 5 to purge the dust in the pipe; after the purging time is over, the air pump 3 is controlled by the control box 7 to close, and then the first valve 8 is closed, and the normally open solenoid valve 6 is opened. At this time, the air-suction air sampling smoke alarm system can perform normal air sampling detection.

[0031] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. An aspirating air sampling smoke alarm system, comprising an aspirating detector (1), and a plurality of air sampling tubes (2) connected to the aspirating detector (1), characterized in that: It also comprises an air pump (3), a first main pipe (4), a first branch pipe (5), a normally open electromagnetic valve (6), and a control box (7); the air outlet of the air pump (3) is connected to one end of the first main pipe (4); the other end of the first main pipe (4) is connected to a plurality of first branch pipes (5); the number of the first branch pipes (5) is the same as the number of the air sampling pipes (2); the plurality of first branch pipes (5) are respectively connected to a plurality of air sampling pipes (2); the normally open electromagnetic valve (6) is arranged on the air sampling pipe (2); the normally open electromagnetic valve (6) is located on the pipe section of the air sampling pipe (2) between the air suction detector (1) and the first branch pipe (5); the control box (7) is respectively electrically connected to the air suction detector (1) and the air pump (3).

2. The aspirated air sampling smoke alarm system according to claim 1, characterized in that: The first main pipe (4) is detachably connected to a first valve (8).

3. The aspirated air sampling smoke alarm system according to claim 1, characterized in that: The diameter of the first main pipe (4) is greater than the diameter of the first branch pipe (5).

4. The aspirated air sampling smoke alarm system according to claim 3 is characterized in that: The diameter of the first branch pipe (5) is greater than the diameter of the air sampling pipe (2).

5. The aspirated air sampling smoke alarm system according to claim 4, characterized in that: The diameter of the first branch pipe (5) is 30 mm; the diameter of the air sampling pipe (2) is 25 mm.

6. The aspirated air sampling smoke alarm system according to any one of claims 1 to 5, characterized in that: The air sampling tube (2) is connected to a plurality of capillary sampling tubes (9).

7. The aspirated air sampling smoke alarm system according to claim 6, characterized in that: The lower end of the capillary sampling tube (9) is detachably connected to a sampling head (10).

8. The aspirated air sampling smoke alarm system according to claim 6, characterized in that: The capillary sampling tube (9) is made of a soft tube.

Images