JPH09269283A - Sampling piping system for monitoring environment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sampling piping system for monitoring the environment in which the amounts of suction of airs sucked from each suction port of a sampling piping and the sensitivity do not vary at each suction port as well as obtain a sampling piping system for monitoring the environment in which the response time from each suction port does not vary. SOLUTION: The system S comprises a sampling piping 1 which is connected to the region to be monitored and has plural suction ports 2 of same bore, a suction part 6 which is connected to a piping 1 to stuck air from a suction port 2 and a detecting device 7 which detects physical factors from the air sucked through the sanction port 6. In this case, the line resistances of lice lines connected between the plural suction ports 2 of same bore and the suction part 6 are equal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an environment monitoring sampling pipe system for investigating and monitoring various factors (humidity, smoke, heat, combustion produced gas, etc.) intervening indoor air, which are related to a fire hazard and a phenomenon when a fire occurs. Regarding

[0002]

2. Description of the Related Art A conventional sampling pipe has a plurality of inlets at regular intervals in the longitudinal direction because it is necessary to take in air from one alarm area from dispersed positions in the alarm area. It was a pipe provided (JP-A-5-307690).

In the sampling pipe in which the suction ports having the same diameter are formed at equal intervals, comparing the air flow in the pipe on the suction side and the tip side of the pipe, a negative pressure ( The difference between the suction pressure and the atmospheric pressure) is considerably larger, and as a result, there is a considerable difference between the two in terms of the air intake amount.

Also, as in Japanese Utility Model Laid-Open No. 53-78991, the suction port is gradually increased toward the tip,
Alternatively, there is a pipe in which the suction ports are gradually and densely arranged toward the tip.

[0005] In this case, it is difficult to calculate the diameter of the suction port and the distance between dense and dense portions, and even if the equipment is designed according to the calculation, the suction amount in the actual equipment is such that the suction port has a small hole. Because of this, there are large variations in diameter accuracy and burrs on the edges of machined small holes, etc., and there was a limit to the accuracy in order to achieve the same inhalation amount.

As another method for reducing the variation in the suction amount, it is considered that the sampling pipe is made sufficiently thick. By doing this, the ventilation speed in the pipeline becomes gentle, and the piping friction loss proportional to the square of the speed can be made negligibly small.Therefore, there is no difference in the pressure between the suction side and the tip side, and there is almost no variation. Disappear.

However, this method has a fatal drawback that a large diameter pipe is used, so that it is not easy to handle in construction, the cost is high, the appearance is impaired, and above all, the response is extremely slow due to the slow ventilation rate. is there.

[0008]

Therefore, in the above-mentioned conventional example, if the suction amount of the suction port varies, the sensitivity greatly varies depending on the position of the caution area. In such a case, for example, when warning the fire, if the lowest sensitivity is set, the frequency of false alarms will increase at high sensitivity positions, and if the highest sensitivity is set, the alarm will be delayed at low sensitivity positions. Such problems occur.

Further, if a plurality of suction ports are provided in one pipe at regular intervals in the longitudinal direction, there will be a time difference in response between the suction portion side and the tip side. For example, in the case of monitoring every minute and recording events, if there is a time lag in the response, it is not possible to identify when the event occurred, making it difficult to accurately analyze the event, and to determine the cause of the accident. There will be cases where it will be affected.

In view of the above circumstances, an object of the present invention is to provide an environment monitoring sampling pipe in which the amount of air sucked from each suction port of the sampling pipe is the same and the sensitivity at each suction port does not vary. To get the system.

Another object is to obtain a sampling piping system for environment monitoring which has no difference in response time from each suction port.

[0012]

The present invention which achieves the above object will be described. A sampling pipe having a plurality of suction ports formed in the monitoring area and having the same diameter is connected to the sampling pipe. A sampling pipe system for environment monitoring, comprising: a suction unit that sucks air from the suction port; and a detection device that detects a physical factor from the air sucked by the suction unit. The sampling pipe system for environmental monitoring is characterized in that the conduit resistances of the conduits from each of the plurality of suction ports formed to have the same diameter are the same as each other.

A sampling pipe having a plurality of suction ports formed in the monitoring area and having the same diameter,
A sampling piping system for environment monitoring, comprising: a suction unit that is connected to the sampling pipe and sucks air from the suction port; and a detection device that detects a physical factor from the air sucked by the suction unit, The sampling pipe, each of the plurality of suction ports formed with the same bore, is formed at one end of each of the plurality of suction pipes formed with the same length and the same inner diameter, In addition, a collective suction pipe formed by collecting the plurality of suction pipes by connecting the other ends of the plurality of suction pipes to a header, and a common introduction pipe connecting the collective suction pipe and the suction unit. This is a sampling piping system for environmental monitoring.

Further, a plurality of collecting suction pipes, which are formed by collecting the plurality of suction pipes, are provided, and each of the plurality of collecting suction pipes and the introduction pipe are formed to have the same length and the same inner diameter. It is a sampling piping system for environment monitoring connected via each of a plurality of connecting pipes.

Embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows a piping system diagram when the sampling piping of the sampling piping system of the present invention is arranged on a ceiling surface or the like of a monitoring area.

In FIG. 1, reference numeral 10 is a monitoring area, and a sampling pipe 1 arranged in this monitoring area 10.
Are four suction pipes 3 having the same inner diameter and the same length, and suction ports formed at one end of each of the suction pipes 3, that is, at the respective tip ends with the same diameter. Two
And a header 4 to which the other end of each of the suction pipes 3, that is, a base end is connected, and a collective suction pipe 20 composed of four suction pipes. It is provided with a common introduction pipe 5 that connects the suction unit 6 via the header 4. Humidity, smell, smoke, heat from the sampling pipe 1, a suction unit 6 connected to one common introduction pipe 5 in the sampling pipe 1, and air sucked from the suction port 2 by the suction unit 6. Detection device 7 for detecting one or more of physical factors such as combustion product gas
The sampling piping system S is constituted by

As described above, the four suction tubes 3 have the same inner diameter,
One common introduction pipe 5 that is formed with the same pipe length, is assembled by the header 4 that is a header and is connected to the suction unit 6.
Since they are connected to each other, the pipe line configurations from the respective suction ports 2 to the suction portion 6 via the suction pipe 3, the header 4, and the introduction pipe 5 are the same. Therefore, since the pipeline resistances in the pipelines from the suction ports 2 to the suction portions 6, that is, the pipe friction losses, all exhibit the same situation, the suction amounts from all the suction ports 2 become equal, and the plurality of suction ports 2 have the same suction amount. , There is no difference in sensitivity. In addition, all the suction ports 2 to the suction unit 6
Since there is no difference in the response time up to, the accurate event analysis is possible.

In the above description, an example in which one suction port 2 is provided at the tip of each suction pipe 3 has been described, but the present invention is not limited to this.
It suffices that the conduit resistances in the conduits extending from the respective suction ports 2 to the suction section 6 are equal to each other.
The suction port 2 may be provided in the middle of each suction pipe 3, or a plurality of suction ports 2 may be provided in each suction pipe 3 evenly along the same circumference of the suction pipe.

In the figure, the header 4 of the collective suction pipe 20 in the sampling pipe 1 has a monitoring area 10.
Is arranged so as to be located in the central portion of each of the suction ports 2, and the suction pipes 3 are radially arranged from the header 4 and the suction ports 2 are disposed at appropriate positions. As described above, since the header 4 which is a header is interposed in the middle of the sampling pipe 1 as described above, when the position of the header 4 is determined to be substantially in the center of the monitoring area at the time of construction, the suction port 2 is opened. It is easy to place in an appropriate position and easy to construct. In addition, the header 4 can be fixed to a place where it can be easily attached such as a wall or a pillar, so workability is good.

The header 4 is further described. The header 4 collects a plurality of suction pipes 3 in the collecting suction pipe 20 and communicates them with one introducing pipe 5. Details of the header 4 in the present invention are shown in FIGS. That is, in the figure, four inlet side connection ports 4b having the same diameter are formed evenly on the outer periphery of the header 4 formed in a cylindrical shape, and the central portion of the upper surface (or the lower surface) may be formed. One outlet side connection port 4a is formed. Therefore, the distances from the inlet side connection ports 4b to the outlet side connection ports 4a are all equal. The base ends of the four suction pipes 3 are connected to the inlet-side connection ports 4b of the header 4, and the single common introduction pipe 5 is connected to the outlet-side connection port 4a. As described above, since the distances between the inlet-side connection ports 4b and the outlet-side connection ports 4a, which have the same diameter, are all equal, the amount of suction sucked from the suction ports 2 of the suction pipes 3 in the header 4 is equal. There is no difference in.

Although not shown, the header 4 has an inspection port through which dust and the like can be cleaned.

The number of the inlet side connection ports 4b in the header 4 depends on the number of the suction pipes 3 to be connected, and is not limited to the above four.

Further, the structure of the header 4 is not limited to the above, each inlet side connection port is formed with the same diameter, and the distance between each inlet side connection port and the outlet side connection port is equal. Since it may have any configuration, for example,
As shown in FIG. 4, a plurality of inlet-side connection ports 4b having the same diameter are provided uniformly on the same circumference centered on the center of the upper surface (or the lower surface) of the header formed in a cylindrical shape. The outlet side connection port 4a may be provided at the center of the upper surface.

The sampling pipe 1 in the sampling pipe system S of the present invention includes, as the suction pipes 3 constituting the collective suction pipe 20, for example, a stainless pipe, a steel pipe,
A flexible pipe such as a vinyl pipe that can be bent is used. Therefore, as shown in FIG. 5, since the suction tube 3 can be bent and arranged according to the installation position of the suction port 2, the workability is very good.

The piping system diagram shown in FIG. 6 shows an embodiment of the sampling piping 1 in the sampling piping system S of the present invention using a piping system different from the above. That is, four collecting pipes 20 each having four suction pipes 3 connected to the header 4 are evenly arranged in one monitoring area 10, and the headers 4 of the collecting pipes 20 are connected to each other. Connecting pipe 8 from the connecting part 9 to the common introducing pipe 5
The connecting pipe 8 has the same pipe line resistance from each header 4 to the connecting portion 9, that is, in the present embodiment, the connecting pipe 8 has the same inner diameter and the same pipe length. It is constructed so that it becomes small. In this embodiment, a part of the connecting pipes 8 forming the respective conduits from the header 4 of each collective suction pipe 20 to the connecting part 9 is common between the respective headers 4 to the connecting part 9. And the connecting pipe 8 is formed in an H shape. With this configuration, even if a plurality of collecting suction pipes 20 including a plurality of suction pipes 3 are arranged in one monitoring area 10, the resistance of the suction pipe 2 from the suction port 2 to the suction portion 6 is reduced. They can be the same, and there is no difference in the suction amount and the response time to the suction portion at each suction port 2.

The connecting pipes 8 may be four independent pipes having the same inner diameter and the same length from each header 4 to the connecting portion 9, and the connecting pipes 8 are provided. Alternatively, four common introduction pipes 5 having the same inner diameter and the same length may be provided and directly connected to the header 4 of each collective suction pipe 20.

If a plurality of collective suction pipes 20 constituted by a plurality of suction pipes 3 can be arranged in one monitoring area 10, a large number of suction ports 2 can be easily arranged, and the monitoring area can be formed. Since it can be widely used, it is suitable for installing a sampling piping system in a wide monitoring area, and the workability is also very good.

The structure of the suction port 2 will be described. When the suction port 2 is a single-port nozzle 2a with a filter connected to the tip of the suction tube 3 as shown in FIG.
Insects and dust do not enter through the suction port 2. Therefore, there is no possibility that insects and dust will be accumulated in the pipeline and the pipeline friction will be increased, resulting in a decrease in sensitivity, and it will not be known where the insects and dust are accumulated in the pipeline. Also disappears. Also, insects fly to the detection device, block the sensor main part of the detection device,
There is nothing that causes a failure.

[0028]

According to the sampling pipe system for environmental monitoring of the present invention constructed as described above, the sampling pipe so that the inside diameter of the pipe and the length of the pipe of the pipe passage from each suction port to the suction portion are all the same. Since all of the pipe friction losses in the pipe lines from the respective suction ports to the suction portion are the same, the suction amount of air from all the suction ports becomes equal. Therefore, there is no difference in sensitivity between the suction ports.

Further, since there is no difference in response time from all the suction ports to the suction unit, that is, the detection device, accurate event analysis is possible.

[Brief description of drawings]

FIG. 1 is a piping system diagram of sampling piping in an environment monitoring sampling piping system of the present invention.

FIG. 2 is a top view of a header used for sampling piping in the environment monitoring sampling piping system of the present invention.

FIG. 3 is a front view of the same.

FIG. 4 is a top view of a header according to another embodiment different from the headers of FIGS. 2 and 3.

FIG. 5 is a piping system diagram of another embodiment of the sampling pipe in the environment monitoring sampling pipe system of the present invention.

FIG. 6 is a piping system diagram of still another embodiment of the sampling pipe in the environment monitoring sampling pipe system of the present invention.

FIG. 7 is a front view of a nozzle used for sampling piping in the environment monitoring sampling piping system of the present invention.

[Explanation of symbols]

 1 Sampling pipe 2 Suction port 3 Suction pipe 4 Header 4a Outlet side connection port 4b Inlet side connection port 5 Common introduction pipe 6 Suction part 7 Detection device 8 Connection pipe 10 Monitoring area 20 Collective suction pipe

Claims (6)

[Claims] 1. A sampling pipe having a plurality of suction ports formed in the monitoring area and having the same diameter, a suction unit connected to the sampling pipe for sucking air from the suction port, and the suction unit. A detection device for detecting a physical factor from the air sucked by the section, and an environmental monitoring sampling pipe system, wherein the sampling pipe is provided with the suction ports from each of a plurality of suction ports formed with the same diameter. A sampling piping system for environmental monitoring, characterized in that the resistances of the conduits leading to the section are the same. 2. A sampling pipe having a plurality of suction ports formed in the monitoring area and having the same diameter, a suction unit connected to the sampling pipe for sucking air from the suction port, and the suction unit. A detection device for detecting a physical factor from the air sucked by the section, and a sampling pipe system for environment monitoring, comprising: the sampling pipe, each of a plurality of suction ports formed with the same diameter, The suction tube is formed at one end of each of a plurality of suction tubes having the same length and the same inner diameter, and the other end of each of the plurality of suction tubes is connected to a header to make a plurality of suction tubes. An environmental monitoring sampling pipe system comprising: a collecting suction pipe formed by collecting pipes; and a common introduction pipe connecting the collecting suction pipe and the suction unit. 3. A plurality of collecting suction pipes, each of which is formed by assembling the plurality of suction pipes, and each of the plurality of collecting suction pipes and the introduction pipe are formed to have the same length and the same inner diameter. The sampling pipe system for environment monitoring according to claim 2, wherein the sampling pipe system is connected via each of a plurality of connecting pipes. 4. The environment monitoring sampling pipe system according to claim 2, wherein a part or all of the suction pipe is formed of a flexible pipe and is bendable. 5. The header of the collective suction pipe is provided with a plurality of inlet side connection ports to which the suction pipes are connected and which are formed with the same diameter, and an outlet side connection port to which the introduction pipe is connected. The sampling pipe system for environmental monitoring according to claim 2, 3, or 4, wherein all the distances between the inlet side connection port and the outlet side connection port are the same. 6. The environment monitoring sampling pipe system according to claim 2, wherein the suction port is a single port nozzle with a filter.