SU25862A1 - Device for maintaining constant air pressure in the sprinkler network - Google Patents

Description

The invention relates to devices for maintaining constant air pressure in a sprinkler network, consisting of a tank with compressed air, an automatic regulator and a connecting air tube with a low-flow diaphragm placed inside it.

In the proposed device, in order to compensate for the usual air leakage through leakages of the sprinkler network, the latter is connected to the automatic regulator chamber, the lower chamber of which, separated from the first valve, is connected with a diaphragm tube to a compressed air reservoir. In a modification of the device, a signal check valve is installed on the connecting tank reservoir, between the diaphragm and the regulator.

In FIG. Figure 1 shows a vertical section of a device for maintaining a constant air in the sprinkler network; FIG. 2 is the same, modifying it.

The tank 11 (Fig. 1), filled with compressed air from the compressor 12, communicates via tube b to chamber B of an automatic controller, chamber A of which communicates via tube a with the air sprinkler network above the control and signal valve. On the tube b, a diaphragm 10 is installed with a mallet hole. Tank 11 is used as a battery to replenish air leakage through network leaks and must be adequately equipped. The small bore orifice 10 is designed to prevent air from flowing from the reservoir to the air network if the sprinkler is open, while at the same time it must compensate for the normal leakage from the closed sprinkler network. The automatic regulator is designed to maintain the pressure in the air network at the same level with the usual leakage from a closed network and consists of a housing 1, divided into two chambers АB with valve 2, rigidly connected by a rod 3 with a flexible diaphragm 4, which is clamped between flanges 5 and 9 The spring 7 by means of the rod 8 rests on the diaphragm 4 from the atmosphere. The nut 9 serves to adjust the spring pressure on the diaphragm.

The spring can be replaced by a lever and load system; how it is done on

safety valves. The working area of the valve 2 diaphragm 4 are equal to each other.

When pumping air into the tank 11, the air flows from it into the air network, the passage through tube b, valve 2, opened by pressing the spring 7, and the tube and. Increasing network pressure will deflect diaphragm 4, compressing the spring. When the pressure in the network is sufficient to overcome the resistance of the spring and bend the diaphragm so that valve 2 closes the opening between camera A and B, further air flow into the network will stop and the pressure in the network will stop at a certain level. Further pumping air into the tank will increase the pressure in the tank and chamber B of the regulator. About the increase in pressure in chamber B, the opening of the valve 2 of the regulator will not occur because the working areas of the disk 2 and the diaphragm 4 are the same. Air inflation can be stopped when air in the tank is sufficient.

With a slow leakage of air from a closed air network, the pressure in chamber A of the automatic regulator will drop, as a result of which spring 7 will raise valve 2 and air will flow into the network through the hole in the diaphragm 10. When the pressure in the network reaches the previous value, valve 2 will cover the hole between the chambers A and B of the controller and system balance will be restored.

When the sprinkler is opened, the valve will open for the same reason and the air will flow into the network, but due to the fact that the opening in the diaphragm 10 is very small compared to the hole of the sprinkler, the amount of air flowing out of the network will be significantly more than the amount of air coming from the tank, and therefore the network pressure will drop until the control signal valve is opened.

After the control - signal valve is opened, the pressure in the network starts to increase, as a result of which the regulator valve closes and the air supply to the network stops.

In a modification of the device shown in FIG. 2, on the tube connecting the compressed air tank 4 with an automatic regulator b, between the last and diaphragm 5 there is a signal control valve 3 separating the main line 1 supplying water from the main line of the air sprinkler network 2. Compressed air tank 4 -. the spirit is connected via a tube n to a compressor, an e-pipe with line 1, a pipe a with chamber A of valve 3, and, to prevent reverse movement of water or air from the tank to the line 1, is equipped with a valve 8; valve 9 locks the water out of the tank into the tube a. The signal and control valve 3 is equipped with a two-valve valve 7, the upper plate of which, separating chamber A from cadher B, has a larger area than the lower plate covering the outlet of line 1 to chamber B. Chamber A of valve 3 is connected by tube g to chamber G Torah b, chamber D of which tube d communicates with highway 2 of the air sprinkler network. In the saddle of the lower plate of the valve there is an annular groove B communicating with the tube k with the signaling device.

When the system is alerted, the values of pressure in different parts of the system will have the following relationship. The pressure in tank 4 should be equal to the pressure in line 1, but it can be more, depending on how much pressure is raised when pumped by the compressor. The same value is established in the pressure in the chamber A of the signal control valve 3 and in the chamber G of the automatic controller.

The pressure in the air network 2 will depend on the amount of pressure of the spring of the automatic regulator 6 and must be significantly lower than the pressure in chamber D. The same value will be the pressure in chamber B of the signal control valve 3.

At these pressure ratios, the valve of the automatic regulator 6 will be closed, because the pressure acting on the valve disk from the chamber D side is balanced by the same pressure acting on the diaphragm, since the valve areas and the diaphragm are equal to each other;

the valve 7 of the signal - control valve 3 will also be in the closed position,

With a conventional leak in a closed air network, the pressure will drop, the valve of the regulator 6 will open and the air from chamber A of the signal control valve 3 will flow into the network, but at the same time from the tank 4 through the diaphragm 5 air will flow into chamber A. diaphragm 5 should be sufficient to quickly compensate for the leakage of air in chamber A under conditions of normal air leakage from a closed air network.

When the sprinkler is opened, the regulator 6 will open and air will flow out of chamber A of the signal-control apparatus 3, but for the reason that air leakage from the network when the sprinkler is opened is significantly greater than normal air leakage from a closed network, the replenishment of chamber A will be delayed by the air diaphragm 5, pressure in chamber A will fall and valve 7 will open.

The subject matter of the invention.

1. A device for maintaining a constant air pressure in the sprinkler network, consisting of a tank with compressed air, an automatic controller and a connecting air tube with a diaphragm placed inside it, which has a small flow capacity, characterized in that the tank 11, in order to replenish the amount air in the sprinkler network, which is reduced due to normal leaks through leaks, is connected by tube b to chamber B of an automatic controller, to chamber A of which is attached through tube a sprinkler on the network.

2. Change the device described in paragraph 1, characterized in that on. tube b between the automatic regulator and the diaphragm is set by the control valve 3.

copyright certificate E. A. Teyhman

No. 25862.

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FIG. I