KR200422308Y1 - Double check valve type reverse-flowing breaker - Google Patents

Abstract

The present invention relates to a double check valve type fluid backflow prevention device that is installed in a branch to the dedicated fire extinguishing pipe branch from the integrated main pipe to prevent the back flow of contaminated fluid (static water) in the digestive pipe pipe.

The present invention is a double check valve fluid backflow prevention device is installed to block the backflow of stagnant digestion water; A swing-type check valve installed at a part of the digestion pipe branch branched from the integrated main pipe in which the digestion pipe and the water supply pipe are integrated, and selectively opening and closing the flow path by the rotation of the disk to supply the fluid only in one direction; It is installed at intervals or integrally coupled with the swing-type check valve, it is configured to include a disk-type check valve for supplying fluid in one direction by selectively opening and closing the flow path by the forward and backward operation of the disk.

The present invention completely prevents the backflow of fluid due to abnormal operation of the fluid supply equipment through the double check valves of different types, and the inside of the check valve body is coated with a chemical resin material having corrosion resistance to It provides a highly efficient and practical fire alarm and backflow prevention device with an alarm alarm function that prevents pipe contamination and clogging caused by fire and quickly detects and copes with it in case of fire.

 Fire extinguishing pipe, water supply pipe, integrated pipe, check valve, double check valve, backflow prevention

Description

DOUBLE CHECK VALVE TYPE REVERSE-FLOWING BREAKER}

1 is an exemplary cross-sectional view showing an installation state of a swing type check valve according to the prior art;

Figure 2 is a schematic view showing the installation location of the backflow prevention device according to the present invention,

Figure 3 is an illustration of a backflow prevention device according to the present invention,

4 is an exemplary cross-sectional view of a disk check valve of the double check valve according to the present invention,

5 is an exemplary circuit diagram of an alarm pressure switch for explaining the fire alarm function according to the present invention.

♧ description of the symbols for the main parts of the drawing ♧

100 .... Integrated main pipe 110 .... Fire extinguishing pipe

210 ... swing check valve 220 ... disc check valve

300 .... Drain tube 310 .... Alarm pressure switch

The present invention relates to a double check valve type fluid backflow prevention device, and more specifically, a single valve is installed when the fluid is flowed back to the current fire pipe or the fire pipe of the integrated pipe facility in which the water supply pipe and the fire pipe are integrated. The double check valve type fluid backflow prevention device prevents corrosion of the digestion pipe and contamination of the integrated main pipe in the TWO PIPE LINE SYSTEM by effectively operating the remaining valves even if damaged. It is about.

In general, a check valve is one of directional control valves for allowing fluid to flow in only one direction. The check valve is mainly installed in a fire hydrant pipe or a water supply pipe of a building such as an apartment, an officetel, or a house.

Such check valves are disclosed in various forms such as swing type, tilting disc type, lift type, wafer disc type, stop type, and diaphragm type according to the use and characteristics.

Conventionally, since these check valves are installed in a fire extinguishing pipe (for sprinkler equipment) or a water supply pipe in a single type, the check valve may be vibrated due to high hydraulic pressure when a water hammer occurs due to a failure or malfunction of the fluid supply equipment. There was a problem that the fluid flowed backwards due to shock and its durability was deteriorated, and the check valve vibrated due to the water hammer which occurs when the high pressure water was suddenly supplied to the digestive pipe so that the contaminated extinguishing water flowed backward and There was also a problem of corrosion.

In particular, in recent years, in the case of designing and constructing a single line pipe combining a fire hydrant pipe and a water supply pipe, water hammer is generated due to damage or malfunction of the check valve as described above. Will cause serious problems of contamination.

To improve this, the double check valve (Double Check Valve) has been disclosed in Republic of Korea Patent Publication No. 2005-119536 (December 21, 2005).

However, in the case of the double check valve disclosed, since two swing-type check valves 10 as shown in FIG. 1 are simply installed at intervals, the check valves having the same size as those of the size increase are installed. If one is damaged, the other is easily damaged, and the reverse flow prevention function is reduced, and in the case of the swing check valve, since the body is made of cast iron, green water and rust when the extinguishing water is discharged due to the backflow of the fluid or the occurrence of a fire It is a situation that a lot of improvement is required, such as debris generated to contaminate the inside of the pipe or cause clogging of the pipe.

The present invention was devised to solve this problem in view of the above-described limitations of the prior art, and the water hammer caused by a sudden failure or malfunction of the fluid supply equipment in an integrated pipe in which the digestion pipe and the water supply pipe are integrated into one. Even if the backflow of the fluid occurs due to the high hydraulic pressure, the backflow of the fluid is completely blocked by the first and second check valves of different types to prevent contamination of water supply and improve the performance and durability of the fluid supply equipment. Double-check valve-type fluid backflow prevention function with fire alarm alarm function that can detect the contamination in the pipe or the blockage of the pipe and quickly detect it in case of fire by preventing the occurrence of rust by coating the body with corrosion-resistant chemical resin material. Its main purpose is to provide a device.

The present invention, in order to achieve the above technical problem, in the double check valve type fluid backflow prevention device is installed to block the backflow of stagnant digestion water; A swing-type check valve installed at a part of the digestion pipe branch branched from the integrated main pipe in which the digestion pipe and the water supply pipe are integrated, and selectively opening and closing the flow path by the rotation of the disk to supply the fluid only in one direction; Technical features of the present invention include disc-type check valves which are installed at intervals with the swing-type check valves or are integrally installed and integrally connected to each other and supply the fluid only in one direction by selectively opening and closing the flow path by the forward and backward motion of the disc. There is this.

At this time, the swing type check valve is provided with a drain pipe, the upper part of the drain pipe to detect the pressure drop of the extinguishing water caused at the same time as the operation of the sprinkler device to send a fire signal to the receiver installed in the control panel of the fluid supply equipment The alarm pressure switch is further installed in the technical features, and the inside of the swing-type check valve body has a technical feature in the coating of a corrosion-resistant polyethylene resin.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment according to the present invention.

Figure 2 is a schematic view showing the installation of the backflow prevention device according to the present invention, Figure 3 is an illustration of a backflow prevention device according to the present invention, Figure 4 is an exemplary of the disk check valve of the double check valve according to the present invention 5 is an exemplary circuit diagram of an alarm pressure switch for explaining a fire alarm function according to the present invention.

As shown in Figure 2, the backflow prevention device 200 according to the present invention is a fire extinguishing pipe 110 is branched from one side of the integrated pipe 100, the fire pipe and the water supply pipe is integrated into one and connected to the sprinkler facility, such as a building (110) ) Is installed on.

The backflow prevention device 200 includes a double check valve in which check valves are integrally installed in a double manner at intervals along the longitudinal direction of the digestive pipe 110.

That is, as shown in (a), (b) of Figure 3, the double check valve is a swing type check valve 210 and the disc type check valve 220 are installed integrally at intervals alternately with each other. Consists of the configuration.

That is, as shown in (a), the swing type check valve 210 is installed on the upper side of the digestive pipe 110 in the flow direction of the fluid, the disk type check valve 220 is spaced apart from the lower side It may be composed of a structure that is integrally installed on one tube with each other; In addition, as shown in (b), the disk-type check valve 220 is installed on the upper side of the digestive pipe 110 in the flow direction of the fluid, the swing-type check valve 210 is integrated with the lower side at a distance therefrom It may be configured as a structure installed.

At this time, the swing type check valve 210 has the shape and structure as mentioned in the prior art is preferably installed in the alarm check valve (Alarm Check Valve), the disk type check valve 220 of FIG. As shown in (a) and (b), two types of flange type and screw type can be used.

Here, since the swing type check valve 210 has the same structure as that of FIG. 1, a detailed description thereof will be omitted and only the disc type check valve 220 will be described.

That is, in the case of the flange type of the disk-type check valve 220, as shown in Figure 4 (a), having a fixing flange and formed of stainless steel or brass material and the body 221 Disk 222 disposed to open and close the flow path 225 formed in the inner side thereof, a spring 223 for elastically pressing the disk 222, and the body 221 to fix and support the spring 223. It consists of a structure including a spring sheet 224 fixed to the inner peripheral surface of the.

Meanwhile, in the case of the screw type, as shown in FIG. 4 (b), the body 221 'formed of stainless steel or brass and the flow passage 225' formed therein are mostly formed similarly to the flange type. A disk 222 'that opens and closes, a spring 223' that elastically presses it, and a locking jaw 224 'on which the spring 223' is seated, and includes an outer circumferential surface of the upper, lower, or upper and lower ends of the body 221 '. The fastening screw thread (226, 227) is formed in the structure.

Therefore, the installation form of the integrated double check valve according to the present invention is, for example, swing type check valve + flange disc type check valve, swing type check valve + screw disc type check valve, flange disc type check valve + swing type check valve, screw disc It can have 4 types like type check valve + swing type check valve.

In this way, different types of check valves, in particular, durability and design optimization can be achieved, and the reverse flow prevention characteristic can be further improved by arranging disc-type check valves having a small installation area.

In particular, since the disc-type check valve 220 opens and closes the valve while the built-in disk moves in parallel with the digestive water, the sealant is more tightly and tightly sealed as the pressure of the countercurrent digestion water increases, so that the seal is more perfect. (Seal) can be provided.

Furthermore, the swing type check valve 210 is different from the disc type check valve 220 because the body is formed of iron castings, so that rust or debris is generated when used for a long time. It is preferable to zoom by coating the inner surface of the body of the swing-type check valve (210).

In addition, the fire extinguishing pipe 110, in which the double check valve is installed, is also made of stainless steel, brass, CPU resin, etc. in order to prevent the occurrence of rust and debris, or the inner circumference when using a normal galvanized steel pipe. Polyethylene resin, which is the corrosion-resistant material described above, is coated with a certain thickness (not particularly limited in thickness, but preferably coated in a range of 0.1 to 20 mm in view of the tube diameter and flow rate) to further increase durability of the fluid supply equipment. It is particularly desirable to be able to.

And, as shown in Figure 3, the fire extinguishing pipe 110, preferably one side of the pipe is provided with a swing type check valve 210, the drain pipe 300 is formed branched, the drain pipe 300 alarm A pressure switch 310 is installed.

Here, the alarm pressure switch 310 is one of known fire extinguishing equipment switches for opening a valve or sending a fire signal to a receiving panel when water flow occurs by water flow detection, for example, as shown in the circuit diagram of FIG. Kit) is built-in, if the common terminal (COM) and NO terminal are contacted with each other due to the flow of water, there is a delay of about 5 seconds due to the retard kit, and then the signal through the common terminal (COM) by the biased voltage Is sent to the receiver (installed in the fluid supply control panel), it is possible to detect the occurrence of a fire while preventing misunderstanding by water hammer.

That is, the alarm pressure switch 310 is connected to the alarm check valve containing the swing-type check valve 210 by a separate pipe, and the limit switch is built in the pipe to pressurized water at the boundary of the clapper. The primary side pressure gauge and the secondary side pressure gauge maintain the same pressure by dividing the device side (primary side) and the sprinkler head side (secondary side). When generated, the secondary pressure is reduced according to the discharge of the pressurized filled digestive water of the fire extinguishing pipe 110 connected to the sprinkler and the limit switch is operated so that the alarm pressure switch 310 is operated to send a fire occurrence signal to the receiver. It is.

In addition, the drain pipe 300 is a pipe additionally installed to discharge the stagnant extinguishing water during cleaning or repair of the digestive paper pipe (110).

In addition, the double check valve described above is preferably easily fixed by the flange 400 and the bolt and nut 410 for fixing it.

The working relationship of the present invention made of such a configuration is as follows.

The water supplied through the integrated main pipe 100 is partially moved to the sprinkler of the building fire extinguishing facility through the fire extinguishing pipe 110 to maintain a state filled with pressure.

At this time, the water (digested water) passed through the fire extinguishing pipe 110 is supplied via two check valves, that is, a disk type check valve 220 and a swing type check valve 210, so that drinking water is provided by a double check valve. The integrated main pipe 100 to be supplied is securely cut off.

In such a state, if a water hammer is generated due to a malfunction or malfunction of the fluid supply system, the check valve closest to the sprinkler device, that is, as illustrated in FIG. ) Is not completely sealed due to damage or vibration, etc., even if the back of the extinguishing water is different from the disk type check valve 220, which is a check valve of the other type, so that the double is securely sealed from the fire pipe 110 to the integrated main pipe ( 110) prevents the backwater from flowing back.

This is because the swing-type check valve 210 performs a swing motion that rotates with respect to the forward and reverse flow directions of the digestive water, while the disk-type check valve 220 linearly moves parallel to the forward and reverse directions of the digestive water. Therefore, by forming two different check valves having different types of operation as a single unit at intervals, it is possible to reliably prevent damage or damage due to perfect sealing effect against severe water hammer.

Furthermore, since the corrosion resistant material is coated inside the body of the swing type check valve 210, there is no occurrence of rust or debris therein, thereby causing a malfunction or a slight backflow of the swing type check valve 210 itself. Even if it occurs, there is no problem of contaminated water supply (drinking water).

In addition, when the fire is generated while the state is maintained and the sprinkler is activated, the secondary pressure drops rapidly, and the fire occurrence signal is sent to the receiver configured in the control panel of the fluid supplying facility from the alarm pressure switch 310 which detects this. It can be detected early and early due to reoccurrence.

Therefore, it is possible to provide a safe and early fire alarm, it is possible to provide a backflow prevention device of the fire extinguishing fluid is not generated rust and debris.

As described in detail above, the present invention completely blocks the backflow of the fluid due to abnormal operation of the fluid supply equipment through the double check valves of different types, and the inside of the check valve body is coated with a corrosion resistant material, It provides a highly efficient and practical fire alarm and backflow prevention device by preventing pipe contamination and clogging of rust, and also equipped with an alarm alarm function to detect and cope with a fire quickly.

Claims (3)

A double check valve type fluid backflow prevention device installed to block backflow of stagnant extinguishing water; Existing pipeline system is installed in a part of the digestion pipe (110) branched from the fire pipe and the integrated main pipe (100) in which the fire pipe and the water supply pipe are integrated, and the fluid flow in one direction by selectively opening and closing the flow path by the rotation of the disk. Swing type check valve 210 to be supplied only; The swing-type check valve 210 is installed at intervals or integrally coupled to one another, and includes a disk-type check valve 220 to supply the fluid in one direction by selectively opening and closing the flow path by the forward and backward operation of the disk. Double check valve fluid backflow prevention device, characterized in that configured to. The method according to claim 1; The swing type check valve 210 is provided with a drain pipe 300, the upper portion of the drain pipe 300 detects the pressure drop of the extinguishing water caused at the same time as the operation of the sprinkler device to the fire signal of the fluid supply equipment Double check valve fluid backflow prevention device, characterized in that the alarm pressure switch 310 to be sent to the receiver installed in the control panel is further installed. The method according to claim 1 or 2; The double check valve fluid backflow prevention device, characterized in that the inside of the body of the swing-type check valve 210 is coated with a polyethylene resin having corrosion resistance.

Images