KR20190010939A - Apparatus for drain, vent and water filling for wet type sprinkler systems and Method for drain, vent and water filling of wet type sprinkler systems - Google Patents

Abstract

The present invention is characterized in that a drainage process for a water supply pipe and a branch pipe which are fire extinguishing pipes, an exhaust process, and an application process of an appendage dissolved with a dissolved oxygen scavenger are sequentially applied to the water pipe and the branch pipe, Drainage, exhaust and air-sucking device for wet sprinkler which can prevent formation of an air layer and prevent the formal corrosion of copper pipe by keeping dissolved oxygen concentration of several tens ppb or less at the appendage and drainage, The present invention relates to a drainage, an exhaust and an apposition device for a wet sprinkler according to the present invention, comprising: a common pipe selectively attachable to and detachable from a supply pipe of a secondary side of a wet type sprinkler device into which digestion water is introduced; A vacuum evacuating device for evacuating and discharging the extinguishing water and air remaining in the secondary side water supply pipe and the branch pipe of the wet sprinkler device through the common pipe; And an apparati to supply water to the secondary water supply pipe and the branch pipe through the common pipe; (Na ₂ SO ₃ ) or sodium hydrogensulfite (NaHSO ₃ ) to the impregnation device, and the dissolved oxygen scavenger is supplied from the impregnation device to the water supply pipe (X _{Na 2 SO 3} ) or sodium bisulfite (X _{NaHSO 3} ), the mass fraction of sodium sulfite (X _{Na 2 SO 3} ) or sodium bisulfite (X _{NaHSO 3} ) is _{greater than} the mass fraction of sodium sulfite Is calculated from Equation 1 or Equation 2 below.
(Formula 1) πr ² ㅧ l ㅧ ρ _H2O ㅧ X _Na2SO3 / M _Na2SO3 : 2 πr ㅧ t ㅧ l ㅧ _{ρ CuO / M CuO = 1:} 2
(r is the radius of copper pipe in mm, t is the thickness of the CuO film, ρ _CuO is the density of the CuO film (6.35 g / cm ³ ), ρ _H2O is the density of water (1 g / cm ³ ), M _CuO is the molecular weight of CuO 316 g / mol), 1 is the length of the copper pipe, M _Na2SO3 is the molecular weight of the sodium sulfite (126 g / mol), X _Na2SO3 is the mass fraction of sodium sulfite in the digestion water)
(Equation ²⁾ πr 2 l ㅧ ㅧ ρ _H2O ㅧ X _NaHSO3 / M _NaHSO3: 2 πr ㅧ t ㅧ l ㅧ _{ρ CuO / M CuO = 1:} 2
(r is the radius of copper pipe in mm, t is the thickness of the CuO film, ρ _CuO is the density of the CuO film (6.35 g / cm ³ ), ρ _H2O is the density of water (1 g / cm ³ ), M _CuO is the molecular weight of CuO 316g / mol), l is the molecular weight of the sodium length, M _NaHSO3 is hydrogen sulfite of copper tubing (104g / mol), X _NaHSO3 is of sodium bisulfite in the fire-fighting water weight fraction)

Description

Technical Field [0001] The present invention relates to drainage, exhaust and impregnation devices for wet sprinklers, and drainage, exhaust and impregnation methods for wet sprinkler devices using the same. }

The present invention relates to a drainage, an exhaust and an impregnation device for a wet sprinkler, and a drainage, exhaust and impregnation method using the same. More particularly, the present invention relates to a drainage, By sequentially applying drainage process, exhaust process and dissolved oxygen additive dissolved appendage to the engine, it is possible to prevent formation of a pressurized air layer in the water supply pipe and branch pipe and maintain the dissolved oxygen concentration of the appendage to several tens ppb or less Drainage, exhaust and apposition apparatuses for wet sprinklers capable of preventing formal corrosion of copper pipes, and methods of drainage, exhaust and apposition of wet sprinkler apparatuses using the same.

A sprinkler facility is mandatory in the tall buildings of eleven stories or more to suppress the fire at an early stage (see Non-Patent Document 1).

As shown in FIG. 1, the wet sprinkler facility of the sprinkler facility is generally divided into a water supply unit 110 for supplying water for fire extinguishing water, a water supply pipe 120, and a water supply pipe 120, and a sprinkler head 160 (Not shown). A check valve 130 selectively opened by a pressure difference is provided at one point of the water supply pipe 120. The water supply pipe includes a primary water supply pipe 121 between the water supply device 110 and the check valve 130, And a secondary side water supply pipe 122 between the check valve 130 and the branch pipe 150. A first pressure gauge 141 for measuring the pressure in the primary side water supply pipe 121 and a second pressure gauge 142 for measuring the pressure in the secondary side water supply pipe 122 are provided at the front end and the rear end of the check valve 130, Respectively. The first pressure gauge 141 is connected to one side 143 of the first pressure gauge valve and the second pressure gauge 142 is connected to one side of the second pressure gauge valve 144.

The principle of spraying the fire water through the sprinkler head 160 is as follows. When the sealed state of the sprinkler head 160 is released by the occurrence of fire in the state where the fire extinguishing water which is pressurized (0.5 to 0.7 MPa) is filled in the primary side water supply pipe 121 and the secondary side water supply pipe 122, And the branch pipe (150) are sprayed to the outside through the sprinkler head (160). A pressure difference is generated between the secondary water supply pipe 122 and the primary water supply pipe 121 as the fire water in the secondary water supply pipe 122 is injected through the sprinkler head 160. By this pressure difference, And the fire extinguishing water of the water supply unit 110 is supplied to the secondary water supply pipe 122 through the primary water supply pipe 121 so that it is possible to continuously supply the water for fire extinguishing water to the sprinkler head 160.

On the other hand, when the wet sprinkler facility is newly installed or after the fire occurs, the sprinkler head 160 is replaced, and the process of filling the secondary water supply pipe 122 and the branch pipe 150 with digestion water, that is, an appendage process, proceeds. In the appendage process, the water for fire extinguishing water of the water supply device 110 is supplied to the secondary water supply pipe 122 and the branch pipe (not shown) via the primary water supply pipe 121 while the sealed sprinkler head 160 is mounted on the end branch pipe 152 150 as shown in FIG.

The air in the secondary side water supply pipe 122 and the branch pipe 150 is pushed into the end branch pipe 152 by the high pressure fire water and is clogged by the sprinkler head 160 to be introduced into the end branch pipe 152 Remains. The air remaining in the end branch pipe 152 is pressurized by the high-pressure fire water, and is positioned on the upper side of the end branch pipe 152 due to the difference in specific gravity (refer to 'the pressurized air layer' in FIG. 6) .

When the pressurized air at a high pressure of 0.5 to 0.7 MPa is present on the upper side of the end branch pipe, the dissolved oxygen concentration of the digestive water in the branch pipe becomes generally higher, Formal corrosion is very likely to occur. Recently, it has been found that formal corrosion caused by the phenomenon of oxygen concentration cell action is a main cause of leakage of water in a wet sprinkler equipped with copper fire extinguishing pipes of some apartments in Korea (refer to non-patent document 2). FIG. 7 is a photograph of the inner surface of a sprinkler branch pipe made of a copper material in which leaking water is present, showing that the hole is deeply pitted due to a significant erosion of the inner surface of the digestive pipe due to the difference in dissolved oxygen concentration by the pressurized air layer.

If formal corrosion is already present in the pipeline, there is a difference in oxygen concentration between the formal corrosion zone, which is covered with cyan corrosion products and the dissolved oxygen, The battery phenomenon occurs, so that the formal corrosion in the fire extinguishing pipe made of copper is continued, and as a result, a hole is formed in the pipe to generate a leak (refer to Non-Patent Document 2).

As a method for preventing formal corrosion caused by a pressurized air layer present in the extinguishing piping, the present applicant has proposed a method for evacuating the pressurized air layer through a drain pipe or a test pipe by evacuating a pressurized air layer remaining in the extinguishing piping through vacuum or by purging an inert gas, (Korean Patent No. 1630742, Korean Patent No. 1631163). The present applicant has also proposed a technique capable of preventing the formation of a pressurized air layer in the extinguishing piping at the time of filling of the pressurized air layer with the extinguishing water after exhaust (Korean Patent No. 1734897).

Exhaust of the pressurized air layer through the vacuum exhaust system proposed in the present applicant (Korean Patent No. 1630742) or the purging method of the inert gas (Korean Patent No. 1631163) is premised on the drainage of the digestion water remaining in the digestion pipe. That is, the evacuation process of the pressurized air layer proceeds after the discharge of the water for extinguishing water. In the conventional case, the natural drainage method using gravity is used for drainage of water for digestion, but the gravity drainage method alone does not provide drainage completely.

(Japanese Patent No. 1630742) proposed by the applicant of the present invention (Korean Patent No. 1630742) or an inert gas purging system (Korean Patent No. 1631163) is actually applied to the field, the vacuum exhaust or the inert gas filling The water pipe 120, the water supply valve 123, the check valve 130, the drain pipe 170, and the drain valve 171 must be separated from the drain valve 171 in a narrow And it is very difficult to connect a pipe for vacuum exhaust or inert gas filling to the drain valve 171 even if it is separated. In addition, although the vacuum valve or the inert gas filling can be performed through the test valve, the test valve 181 is normally located in the narrow space of the household, and it is expected that the equipment including the vacuum pump will be difficult to be brought in and operated in the household.

On the other hand, in order to stop the progress of the formal corrosion due to the oxygen concentration difference cell development, not only the air in the pipe is removed but also the dissolved oxygen concentration of the digestion water is made as low as 0.1 ppm or less, It is necessary to minimize the oxygen concentration difference between the adjacent portions.

Several methods have been used to lower the concentration of dissolved oxygen in water. A method of removing oxygen by a physical method such as a method of bubbling with nitrogen or a method of vacuum evacuation and a method of chemically reducing oxygen using a chemical such as sodium sulfite (Na ₂ SO ₃ ) or hydrazine (N ₂ H ₄ ) Method is used. It is known that the dissolved oxygen concentration can be lowered by 0.5 ppm by the nitrogen bubbling method and by 1 to 2 ppm by the vacuum evacuation method, and it can be lowered to the level of several ppb by the chemical method. When sodium sulfite is used in the chemical method, the dissolved oxygen is removed by the equation ( ₁ ), and when the sodium hydrogen sulfite (NaHSO ₃ ) is used, the dissolved oxygen is removed by the equation (2).

(Formula 1) Na ₂ SO ₃ + 1 / 2O _{2 -} > Na ₂ SO ₄

(Formula 2) NaHSO ₃ + 1 / 2O _{2 -} > NaHSO ₄

In order to prevent the corrosion of steel boilers, it is known to put about two to three times the chemical equivalent of sodium sulphate or hydrazine in the water required to completely eliminate the dissolved oxygen in the water. Specifically, 40 to 60 ppm of sodium sulfite is required to remove 5 ppm of dissolved oxygen. On the other hand, it is difficult to find examples of sodium sulfite or sodium hydrogen sulfite for corrosion prevention of copper piping. In particular, sodium sulfite or sodium bisulfite has not yet been used to prevent formal corrosion of sprinkler copper pipes.

It is a copper (II) oxide (CuO) film that is formed thickly on the inner surface of the pipe to act as an obstacle to remove dissolved oxygen by using sodium sulfite or sodium bisulfite in order to stop the formal corrosion already occurring in the copper fire extinguishing pipe. FIG. 8 shows a SEM photograph and a picture of a copper (II) oxide film formed thick in black inside a copper fire extinguishing pipe.

If sodium sulfite or sodium bisulfite is used at a rate of two or three times the chemical equivalent to remove dissolved oxygen as in the case of boilers, sodium or sodium bisulfite reacts with the already formed copper (II) oxide So that it is not used to remove dissolved oxygen and eventually does not prevent formal corrosion phenomenon. Therefore, it is concluded that sodium sulfite or sodium bisulfite should be used in sufficient amount to reduce all of the copper (II) oxide film to the copper (I) oxide film in order to prevent formal corrosion of the copper pipe.

Korean Patent No. 10-1630742 Korea Patent No. 10-1631163 Korean Patent No. 10-1734897

Enforcement Decree of the Fire Prevention, Fire Service Facilities Installation and Maintenance and Safety Management Act Article 15, Annex 5 Engineering Failure Analysis 64 (2016) 111-125 (Sang Hee Suh, Youngjoon Suh, Hyung Kyung Yoon, Jeong Han Oh, Youngjun Kim, KiMin Jung, HyukSang Kwon)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a water supply system, a water supply system and a water supply system, There is a first object of the present invention to provide a drainage, an exhaust and an appendage device for a wet sprinkler which can prevent a pressurized air layer from being formed in a branch pipe, and a drainage, an exhaust and an appendage method of the wet sprinkler device using the same.

(II) (CuO) film formed on the inner wall of the digestion pipe is treated with copper oxide (I) (Cu ₂ O) to remove the dissolved oxygen in the digestion water by using sodium sulfite or sodium hydrogen sulfite, By using the optimum amount of sodium sulfite or sodium hydrogensulfite required to reduce the dissolved oxygen by sodium sulfite or sodium hydrogen sulfite to maintain the dissolved oxygen concentration below several tens of ppb, A drainage, an exhaust and an appendage device for a wet sprinkler capable of preventing a drainage, an exhaust and an appendix of a wet sprinkler device using the same.

According to an aspect of the present invention, there is provided a drain pipe, an exhaust pipe, and an apposition device for a wet sprinkler, including: a common pipe selectively attachable to and detachable from a supply pipe of a secondary side of a wet type sprinkler device; A vacuum evacuating device for evacuating and discharging the extinguishing water and air remaining in the secondary side water supply pipe and the branch pipe of the wet sprinkler device through the common pipe; And an apparati to supply water to the secondary water supply pipe and the branch pipe through the common pipe; (Na ₂ SO ₃ ) or sodium hydrogensulfite (NaHSO ₃ ) to the impregnation device, and the dissolved oxygen scavenger is supplied from the impregnation device to the water supply pipe (X _Na2SO3 ) or sodium bisulfite (X _NaHSO3 ), the mass fraction of sodium sulfite (X _Na2SO3 ) or the mass fraction of sodium bisulfite (X _{NaHSO 3} ) is calculated from the following Equation 1 or Equation 2.

(Formula 1) πr ² ㅧ l ㅧ ρ _H2O ㅧ X _Na2SO3 / M _Na2SO3 : 2 πr ㅧ t ㅧ l ㅧ _{ρ CuO / M CuO = 1:} 2

(r is the radius of copper pipe in mm, t is the thickness of the CuO film, ρ _CuO is the density of the CuO film (6.35 g / cm ³ ), ρ _H2O is the density of water (1 g / cm ³ ), M _CuO is the molecular weight of CuO 316 g / mol), 1 is the length of the copper pipe, M _Na2SO3 is the molecular weight of the sodium sulfite (126 g / mol), X _Na2SO3 is the mass fraction of sodium sulfite in the digestion water)

(Equation ²⁾ πr 2 l ㅧ ㅧ ρ _H2O ㅧ X _NaHSO3 / M _NaHSO3: 2 πr ㅧ t ㅧ l ㅧ _{ρ CuO / M CuO = 1:} 2

(r is the radius of copper pipe in mm, t is the thickness of the CuO film, ρ _CuO is the density of the CuO film (6.35 g / cm ³ ), ρ _H2O is the density of water (1 g / cm ³ ), M _CuO is the molecular weight of CuO 316g / mol), l is the molecular weight of the sodium length, M _NaHSO3 is hydrogen sulfite of copper tubing (104g / mol), X _NaHSO3 is of sodium bisulfite in the fire-fighting water weight fraction)

In addition, the drainage, exhaust, and water supply device for a wet sprinkler according to the present invention may include a common pipe selectively attachable to and detachable from a water supply pipe of a secondary side of a wet type sprinkler device into which water for digestion is introduced; A high-pressure gas supply device for injecting high-pressure gas into the secondary-side water supply pipe through the common pipe, thereby forcibly draining the secondary water supply pipe and the remaining water in the branch pipe; A vacuum evacuating device for evacuating and discharging the extinguishing water and air remaining in the secondary side water supply pipe and the branch pipe of the wet sprinkler device through the common pipe; And an apparati to supply water to the secondary water supply pipe and the branch pipe through the common pipe; (Na ₂ SO ₃ ) or sodium hydrogensulfite (NaHSO ₃ ) to the impregnation device, and the dissolved oxygen scavenger is supplied from the impregnation device to the water supply pipe (X _{Na 2 SO 3} ) or sodium bisulfite (X _{NaHSO 3} ), the mass fraction of sodium sulfite (X _{Na 2 SO 3} ) or sodium bisulfite (X _{NaHSO 3} ) is _{greater than} the mass fraction of sodium sulfite Another characteristic is calculated from Equation 1 or Equation 2 below.

(Formula 1) πr ² ㅧ l ㅧ ρ _H2O ㅧ X _Na2SO3 / M _Na2SO3 : 2 πr ㅧ t ㅧ l ㅧ _{ρ CuO / M CuO = 1:} 2

(r is the radius of copper pipe in mm, t is the thickness of the CuO film, ρ _CuO is the density of the CuO film (6.35 g / cm ³ ), ρ _H2O is the density of water (1 g / cm ³ ), M _CuO is the molecular weight of CuO 316 g / mol), 1 is the length of the copper pipe, M _Na2SO3 is the molecular weight of the sodium sulfite (126 g / mol), X _Na2SO3 is the mass fraction of sodium sulfite in the digestion water)

(Equation ²⁾ πr 2 l ㅧ ㅧ ρ _H2O ㅧ X _NaHSO3 / M _NaHSO3: 2 πr ㅧ t ㅧ l ㅧ _{ρ CuO / M CuO = 1:} 2

(r is the radius of copper pipe in mm, t is the thickness of the CuO film, ρ _CuO is the density of the CuO film (6.35 g / cm ³ ), ρ _H2O is the density of water (1 g / cm ³ ), M _CuO is the molecular weight of CuO 316g / mol), l is the molecular weight of the sodium length, M _NaHSO3 is hydrogen sulfite of copper tubing (104g / mol), X _NaHSO3 is of sodium bisulfite in the fire-fighting water weight fraction)

The common pipe is selectively attachable to or detachable from a second pressure gauge valve or a common pipe connection valve provided in the secondary side water supply pipe. When the common pipe is connected to the second pressure gauge valve, the common pipe is connected to a portion where the second pressure gauge of the second pressure gauge valve is provided.

The vacuum exhaust apparatus includes a vacuum pump, a vacuum chamber, and a vacuum exhaust pipe. The vacuum exhaust pipe connects between the common pipe and the vacuum chamber. When the vacuum pump is operated, air in the secondary- Common piping. The vacuum exhaust pipe, and the vacuum chamber. When the digestion water remains in the secondary water supply pipe and the branch pipe, the digestion water is drained to the vacuum chamber.

A vacuum valve is provided at one side of the vacuum exhaust pipe, a vacuum system for measuring the degree of vacuum is provided at one side of the vacuum chamber, and a vent valve for recovering the vacuum chamber to atmospheric pressure is provided, and at the lower side of the vacuum chamber, And a vacuum chamber drain valve for discharging water for fire extinguishing water discharged from the water supply pipe and the branch pipe.

Wherein the apposition tank includes an apposition tank, an appendage pump, and an apposition pipe, wherein the apposition tank stores apposition water, and the apposition pump is provided in a form locked to the apposition water in the apposition tank, And supplies the water to the secondary water supply pipe and the branch pipe of the wet sprinkler device through the common pipe, and the water supply pipe is provided between the water supply pump and the common pipe.

One end of the flexible pipe is connected to a valve connected to a common pipe provided at one side of the second pressure gauge valve or the secondary side water pipe, and the other end of the flexible pipe is connected to a common And both ends of the flexible pipe are connected to each other through a second pressure gauge valve (or a valve connected to a common pipe provided at one side of the secondary side water supply pipe) and a common pipe and an adapter.

The drainage, exhaust and fill-in method of the wet sprinkler apparatus according to the present invention is characterized in that, in a state in which the common pipe of the drainage, exhaust, and / or sucking device for the wet sprinkler device is connected to the supply pipe of the secondary side of the wet sprinkler device, And discharging the fire extinguishing water remaining in the secondary water supply pipe and the branch pipe by the gravity drop through the drain pipe and the test pipe; A step of exhausting the air remaining in the secondary pipe and the branch pipe through a vacuum pump to the outside through a common pipe, a vacuum exhaust pipe, and a vacuum chamber in a state in which both the water supply valve, the drain valve and the test valve of the wet sprinkler device are shut off ; And the wet sprinkler system are connected to each other through a sucking pipe, a common pipe, a secondary side water supply pipe and a branch pipe which are brought into a vacuum state through an appendage pump in a state in which the water supply valve, the drain valve and the test valve are all blocked The method comprising the steps of:

In addition, the drainage, exhaust, and fill-in method of the wet sprinkler device according to the present invention is characterized in that, in a state in which the common pipe of the drainage, exhaust, and / or filling device for the wet sprinkler device is connected to the supply pipe of the secondary side of the wet sprinkler device, Opening the test valve and draining the water for fire extinguishing water remaining in the secondary side water supply pipe and the branch pipe by the gravity drop through the drain pipe and the test pipe; The water supply valve of the wet sprinkler device is shut off and either the drain valve or the test valve is opened and the high pressure gas is injected into the secondary side supply pipe and the branch pipe via the high pressure gas supply pipe and the common pipe through the high pressure gas supply device, Forced drainage of residual water in the secondary water supply pipe and branch pipe through the test pipe; A step of exhausting the air remaining in the secondary pipe and the branch pipe through a vacuum pump to the outside through a common pipe, a vacuum exhaust pipe, and a vacuum chamber in a state in which both the water supply valve, the drain valve and the test valve of the wet sprinkler device are shut off ; And the wet sprinkler system are connected to each other through a sucking pipe, a common pipe, a secondary side water supply pipe and a branch pipe which are brought into a vacuum state through an appendage pump in a state in which the water supply valve, the drain valve and the test valve are all blocked The method comprising the steps of:

In the step of evacuating the air remaining in the secondary side water supply pipe and the branch pipe by the vacuum pump, when the water for fire extinguishing remains in the secondary side water supply pipe and the branch pipe, the residual fire water is drained to the vacuum chamber.

The wet sprinkler device includes a water supply device for supplying water for fire fighting, a water supply pipe for transferring fire water to a sprinkler head, the water supply pipe being divided into a primary water supply pipe at the front end and a secondary water supply pipe at the rear end, A sprinkler head provided at one end of the branch pipe for spraying the water for extinguishing water to the outside, and a sprinkler head provided at one side of the secondary water supply pipe, A drain valve provided in the drain pipe, a test pipe in a form branched at one end of the branch pipe, and a test valve at one side of the test pipe.

The drainage, exhaust, and apposition apparatuses for a wet sprinkler according to the present invention and the method for draining, exhausting, and filling the wet sprinkler apparatus using the same have the following effects.

In the drainage process, the evacuation process, and the filling process of the wet sprinkler device, the forced drainage process using the high-pressure inert gas (or compressed air) and the additional drainage and the evacuation process using the vacuum pump are sequentially applied, Sufficient drainage and venting to the branch pipe is possible. It is possible to prevent the formation of the pressurized air layer in the branch pipe when the water for digestion water is filled, thereby suppressing the oxygen concentration difference cell phenomenon caused by the difference in the dissolved oxygen concentration.

In addition, according to the present invention, by using a separate appendage device using an underwater pump type sucking pump, it is possible to prevent the air entrainment generated at the time of sucking by using a water supply device that supplies the extinguishing water.

In addition, since the drainage, exhaust and air-sucking device for the wet sprinkler according to the present invention is selectively removable in the wet-type sprinkler device, the device is no longer required when the drainage- It is possible to overcome device space limitation of the device.

In addition, in order to remove dissolved oxygen in the copper pipe by using sodium sulfite or sodium bisulfite, it is required to reduce copper (II) oxide (CuO) present in the copper pipe to copper oxide (I) (Cu ₂ O) It is possible to improve the removal efficiency of dissolved oxygen by sodium sulfite by calculating the concentration of sodium sulfite or sodium hydrogen sulfite and adding sodium sulfite or sodium hydrogen sulfite corresponding to the calculated value.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a wet sprinkler facility according to the prior art; FIG.
FIG. 2 is a schematic view of a drainage, an exhaust and an impounding device and a wet sprinkler device for a wet sprinkler according to an embodiment of the present invention; FIG.
FIGS. 3A to 3C are reference views for explaining a method of draining, evacuating, and filling a wet sprinkler device using a drainage, an exhaust, and an apposition device for a wet sprinkler according to an embodiment of the present invention.
FIG. 4 is a schematic view of a drainage, an exhaust and an impounding device and a wet sprinkler device for a wet sprinkler according to another embodiment of the present invention. FIG.
FIG. 5 is a photograph showing an actual installation state of a drainage, an exhaust and an appendage device for a wet sprinkler, and a wet sprinkler device according to an embodiment of the present invention. FIG.
6 is a reference view showing a pressurized air layer formed in a branch pipe of a wet sprinkler facility according to the prior art.
Fig. 7 is a photograph showing a branch pipe corroded by the phenomenon of oxygen concentration difference cell. Fig.
FIG. 8 is a SEM photograph of a copper oxide (II) film formed thick in black inside a copper digesting pipe.
9 (a) is a view after the corroded copper digestion pipe is immersed in an aqueous sodium sulfite solution for 4 months, and FIG. 9 (b) shows a state in which the copper (II) oxide film formed inside the copper digestion pipe is partially SEM photographs of Cu (I) reduced in dense structure and EDS analysis at two locations.
FIG. 10 is a photograph showing the result of measurement of dissolved oxygen in a copper pipe by using a dissolved oxygen meter after putting a sodium sulfite aqueous solution having a concentration calculated by the method of the present invention in a sparkling copper pipe with a considerably increased corrosion for 4 months .

The present invention discloses a drainage, exhaust, and an appendage device for a wet sprinkler capable of draining, evacuating, and filling an extinguishing piping of a wet sprinkler device. In addition, the present invention provides a technique for suppressing the progress of pitting corrosion in the copper piping of the wet type sprinkler device in implementing the drainage, exhaust, and water filling device for a wet sprinkler.

The drainage, exhaust and water supply device for a wet sprinkler according to the present invention is connected to one side of the digestion pipe of the wet type sprinkler device to allow a sufficient drainage and exhaustion of the digestion pipe to prevent the formation of a pressurized air layer during the filling process, This paper proposes a technique to suppress the corrosion of the digestive pipe due to the oxygen concentration difference cell phenomenon by keeping the dissolved oxygen concentration in the digestive pipe low and uniform.

The present invention proposes a method for forced drainage of water in a water supply pipe and a branch pipe by purging a high pressure inert gas or compressed air into a water pipe and a branch pipe for draining water pipes and branch pipes which are digestive pipes, The present invention also discloses a method for evacuating the air in the water supply pipe and the branch pipe while discharging the remaining water for digestion in the water supply pipe and the branch pipe by using the exhaust device. In addition, the present invention provides a technique for minimizing air entrapment in the case of an appendage by causing an appendage process to proceed to a vacuum state pipe through an appendage device to which an appendage pump of the form of an underwater pump is applied.

The present invention provides a technique capable of overcoming device space limitations due to drainage, exhaustion, and filling of fire extinguishing pipes by selectively allowing the drainage, exhaust, and impregnation devices for wet sprinklers to be selectively attached to fire extinguishing pipes of wet sprinkler devices.

In addition, the present invention, as described above, provides a technique for suppressing the progress of pitting corrosion in a copper pipe of a wet type sprinkler device in realizing a drainage, exhaust, and an apposition device for a wet sprinkler present.

As mentioned in the Background of the Invention, the pitting corrosion of the copper pipe is caused by the phenomenon of oxygen concentration cell action, and the oxygen concentration difference cell phenomenon occurs in the adjacent region And the corrosion reaction (Cu → Cu ²⁺ + 2e) occurs due to the difference in oxygen concentration. Therefore, in order to suppress the occurrence of the oxygen concentration difference cell phenomenon, the dissolved oxygen concentration in the copper pipe must be minimized.

The present invention provides a method for removing dissolved oxygen in digestion water using sodium sulfite (Na ₂ SO ₃ ) or sodium hydrogensulfite (NaHSO ₃ ) as a method for minimizing dissolved oxygen concentration in a copper pipe.

As is well known, sodium sulfite (Na ₂ SO ₃ ) and sodium hydrogen sulfite (NaHSO ₃ ) are used as dissolved oxygen scavengers. However, when sodium sulfite (Na ₂ SO ₃ ) or sodium hydrogensulfite (NaHSO ₃ ) is added to remove dissolved oxygen in the copper pipe, copper oxide (II) (CuO ) To the copper oxide (I) (Cu ₂ O) proceeds.

Specifically, the dissolved oxygen in water reacts with sodium sulfite (Na ₂ SO ₃ ) or sodium hydrogensulfite (NaHSO ₃ ) and its concentration becomes very low. The reduction reaction of copper (II) oxide to copper oxide (I) And has a characteristic of proceeding in a low dissolved oxygen environment. Therefore, when sodium sulfite or sodium hydrogen sulfite is added to lower the dissolved oxygen concentration, the reduction reaction of copper (II) oxide to copper oxide (I) proceeds (see Equation 3 below). The oxygen generated as a by-product in the reduction reaction of copper (II) oxide with copper (I) oxide is again removed by the reaction with sodium sulfite or sodium hydrogen sulfite (see equations 1 and 2 below). Sodium bisulfite and sodium bisulfite do not react directly with copper (II) oxide, but by the sequential reaction described above, copper (II) oxide is eventually reduced to copper (I) oxide (see Equations 4 and 5 below) .

Thus, when sodium sulfite (Na ₂ SO ₃ ) or sodium hydrogen sulfite (NaHSO ₃ ) is added to remove dissolved oxygen in the copper pipe, a considerable amount of sodium sulfite (Na ₂ SO ₃ ) or sodium hydrogen sulfite (NaHSO ₃ ) It is used for copper oxide reduction reaction rather than oxygen removal, and the dissolved oxygen removal efficiency becomes insignificant.

(Formula 1) Na ₂ SO ₃ + 1 / 2O _{2 -} > Na ₂ SO ₄

(Formula 2) NaHSO ₃ + 1 / 2O _{2 -} > NaHSO ₄

(3) 2CuO - > Cu ₂ O + 1 / 2O ₂

(Formula 4) Na ₂ SO ₃ + ₂ CuO - > Cu ₂ O + Na ₂ SO ₄

(Formula 5) NaHSO ₃ + ₂ CuO - > Cu ₂ O + NaHSO ₄

Thus, the present invention is a copper oxide (II) (CuO) a copper oxide (I) sodium sulfite (Na ₂ SO ₃₎ or sodium bisulfite (NaHSO ₃₎ required to return to (Cu ₂ O) present in the copper pipes calculating a concentration, which corresponds to the excess value of the calculated concentration of sodium sulfite (Na ₂ SO ₃₎ or sodium bisulfite (NaHSO ₃₎ the charge by sodium sulfite (Na ₂ SO ₃₎ by the copper oxide reduction reaction or hydrogen sulfite And minimizes the influence of the dissolved oxygen removal reaction of sodium (NaHSO ₃ ). That is, the concentration of sodium sulfite (Na ₂ SO ₃ ) or sodium hydrogensulfite (NaHSO ₃ ) required for the reduction reaction of copper (II) oxide (CuO) into copper oxide (I) (Cu ₂ O) Most of the copper (II) oxide (CuO) present in the copper pipe is converted into copper oxide (I) (Cu ₂ (II)) by introducing sodium sulfite (Na ₂ SO ₃ ) or sodium hydrogen sulfite (NaHSO ₃ ) (Na ₂ SO ₃ ) or sodium hydrogensulfite (NaHSO ₃ ) to improve the efficiency of the removal of dissolved oxygen by making a sufficient contribution to the dissolved oxygen removal reaction.

The minimum concentration of the copper oxide (II) (CuO), copper oxide (I) sodium sulfite (Na ₂ SO ₃₎ or sodium bisulfite (NaHSO ₃₎ required to return to (Cu ₂ O) to present in the copper pipe is as follows: It is calculated through the same process.

For the reduction reaction of copper (II) oxide (CuO) to copper oxide (I) (Cu ₂ O) as shown in Formula 4, 1 mole of sodium sulfite (Na ₂ SO ₃ ) is required. In addition, the required sodium sulphate volume in the copper piping is summarized as πr ² ㅧ ㅧ ρ _H2O ㅧ X _Na2SO3 / M _Na2SO3 , and the copper oxide (II) (CuO) volume in the copper pipe is 2πr ㅧ t ㅧ ㅧ _{Cu CuO} / M _CuO . The mass fraction of sodium sulphate (X _Na2SO3 ) in digestion water is summarized as a function of the thickness t of copper oxide (II) and the inner diameter r of the pipe. If instead of using a sodium sulfite, sodium hydrogen sulfite (NaHSO _3), the weight fraction of (X _NaHSO3) of sodium bisulfite is calculated through the expression (8) and (9) below.

(Equation 6) πr ² ㅧ l ㅧ ρ _H2O ㅧ X _Na2SO3 / M _Na2SO3 : 2 πr ㅧ t ㅧ l ㅧ _{ρ CuO / M CuO = 1:} 2

(Equation 7) X _Na2SO3 ? 2.53? T / r

(r is the radius of copper pipe in mm, t is the thickness of the CuO film, ρ _CuO is the density of the CuO film (6.35 g / cm ³ ), ρ _H2O is the density of water (1 g / cm ³ ), M _CuO is the molecular weight of CuO 316 g / mol), 1 is the length of the copper pipe, M _Na2SO3 is the molecular weight of the sodium sulfite (126 g / mol), X _Na2SO3 is the mass fraction of sodium sulfite in the digestion water)

(Equation 8) πr ² l ㅧ ㅧ ρ _H2O ㅧ X _NaHSO3 / M _NaHSO3: 2 πr ㅧ t ㅧ l ㅧ _{ρ CuO / M CuO = 1:} 2

(Equation 9) X _NaHSO3 ? 2.09? T / r

(r is the radius of copper pipe in mm, t is the thickness of the CuO film, ρ _CuO is the density of the CuO film (6.35 g / cm ³ ), ρ _H2O is the density of water (1 g / cm ³ ), M _CuO is the molecular weight of CuO 316g / mol), l is the molecular weight of the sodium length, M _NaHSO3 is hydrogen sulfite of copper tubing (104g / mol), X _NaHSO3 is of sodium bisulfite in the fire-fighting water weight fraction)

The mass fraction (X _Na2SO3 ) or sodium bisulfite (X _NaHSO3 ) of the sodium sulfite in the digestion water is calculated through Equations 7 and 9 and the mass fraction of sodium sulfite in the calculated digestion water (X _Na2SO3), or the oxidation of sodium sulfite or most of the copper (II) (CuO oxide present in the sodium bisulfite when added to the fire-fighting water, copper tubing) that corresponds to the excess value of the sulfur by weight of sodium hydrogen fraction (X _NaHSO3) copper (I) (Cu ₂ O) and remove dissolved oxygen in the copper pipe.

As described above, the amount of sodium sulfite corresponding to the mass fraction (X _{Na 2 SO 3} ) of sodium sulfite is the amount required to reduce copper (II) oxide (CuO) to copper oxide (Cu ₂ O) In order to reduce the dissolved oxygen in the digestion water by using sodium sulfite (or sodium hydrogen sulfite), the mass fraction (X _{Na 2 SO 3} ) of the sodium sulfite (or the mass fraction of sodium bisulfite (X _{NaHSO 3} ) Sodium sulfite should be supplied. Therefore, in order to reduce copper (II) oxide (CuO) to copper oxide (I) (Cu ₂ O) and remove dissolved oxygen in water for digestion, the mass fraction of sodium sulfite (X _{Na 2 SO 3} ) Mass fraction (X _{NaHSO 3} )), for example, 1.5 times the mass fraction of sodium sulphate.

Hereinafter, a drainage, an exhaust and an impregnation device for a wet sprinkler according to an embodiment of the present invention, and a method for draining, evacuating, and filling a wet sprinkler device using the same will be described in detail with reference to the drawings.

The drainage, drainage and drainage device for a wet sprinkler according to one embodiment of the present invention is connected to one side of a wet sprinkler device. Exactly, the drainage, exhaust and air-sucking device for a wet sprinkler according to an embodiment of the present invention is connected to one side of a secondary side water supply pipe of a wet sprinkler device to drain, drain, and fill water for the secondary side water supply pipe and branch pipe of the wet sprinkler device It plays an ongoing role.

The construction of the wet sprinkler device to which the drain, the exhaust and the water sucking device for the wet sprinkler device according to the embodiment of the present invention are connected will be described in detail below. In the wet sprinkler device according to the embodiment of the present invention Drainage, exhaust and an appendix are described.

Referring to FIG. 2, a drainage, exhaust, and an impounding device for a wet sprinkler according to an embodiment of the present invention is connected to one side of a wet sprinkler device. Exactly, the drainage, exhaust and air-sucking device for a wet sprinkler according to an embodiment of the present invention is connected to one side of the secondary-side water supply pipe 122 of the wet-type sprinkler device, so that the secondary-side water supply pipe 122 and the branch pipe 150 Drainage, exhaustion, and appendage.

The construction of the wet sprinkler device to which the drain, the exhaust and the water sucking device for the wet sprinkler device according to the embodiment of the present invention are connected will be described in detail below. In the wet sprinkler device according to the embodiment of the present invention Drainage, exhaust and an appendix are described.

2, a drain, an exhaust, and an impounding device for a wet sprinkler according to an embodiment of the present invention includes a common pipe 10, a high-pressure gas supply device 230, a vacuum exhaust device 210, 220).

The common pipe 10 is connected to the secondary side water supply pipe 122 to supply high pressure gas to the secondary side water supply pipe 122 for forced drainage, drainage of residual digestion water from the secondary side water supply pipe 122, And the supply water for supplying water to the secondary side water supply pipe 122. Specifically, a high-pressure gas such as inert gas or compressed air of about 0.5 MPa of the high-pressure gas supply device 230 is supplied to the secondary-side water supply pipe 122 of the wet-type sprinkler device through the common pipe 10, The secondary water supply pipe 122 and the branch pipe 150 of the wet sprinkler device can be drained through the operation of the vacuum exhaust device 210. [ The main water supply pipe 122 and the branch pipe (not shown) are connected to each other through the common pipe 10, 150).

The common piping 10 is provided at one side of the secondary side water supply pipe 122 of the wet type sprinkler device as described above. In one embodiment, the common piping 10 may be selectively detachably attached to the second pressure gage valve 144 of the secondary side water supply pipe 122 As shown in FIG. Of course, it is also possible to provide a common pipe connection valve (not shown) at one point of the secondary-side water supply pipe 122 and to connect the common pipe 10 to the common pipe connection valve. When the common piping 10 is connected to the second pressure gauge valve 144 of the secondary side water supply pipe 122, the second pressure gauge 142 of the second pressure gauge valve 144 is replaced by the adapter 11, 10 can be connected. That is, it is possible to replace the second pressure gauge 142 and connect the common pipe 10 to the second pressure gauge valve 144. When the drainage, the exhaust and the filling are completed, the common pipe 10 is connected to the second pressure gauge valve 144 And connect the second pressure gauge 142 to the second pressure gauge valve 144.

One end of the flexible pipe may be connected to a second pressure gauge valve 144 or a second side water pipe (not shown) 122 and the other end of the flexible tubing may be connected to the common tubing 10. In this case, The flexible piping also functions as the common piping 10 as described above, and one section of the common piping 10 can be constructed as a flexible piping for ease of detachment from the secondary piping 122. Both ends of the flexible pipe are connected to the second pressure gauge valve 144 (or the valve connected to the common pipe 10 provided at one side of the secondary side water supply pipe 122), the common pipe 10 and the adapters 11 and 12 It can be screwed.

The high-pressure gas supply device 230, the vacuum exhaust device 210, and the impregnation device 220 are as follows.

The high-pressure gas supply device 230 injects inert gas or compressed air of about 0.5 MPa into the secondary-side water supply pipe 122 and the branch pipe 150 of the wet-type sprinkler device through the common pipe 10 as described above, And serves to forcefully discharge the water for fire extinguishing remaining in the main water supply pipe 122 and the branch pipe 150.

A high pressure gas supply pipe 231 is provided between the high pressure gas supply device 230 and the common pipe 10 and a high pressure gas supply valve 231 for controlling the supply of high pressure gas to one side of the high pressure gas supply pipe 231, (232).

The vacuum exhaust apparatus 210 includes a vacuum pump 211, a vacuum chamber 212, and a vacuum exhaust pipe 213. The vacuum exhaust pipe 213 connects the common pipe 10 and the vacuum chamber 212. When the vacuum pump 211 is operated, the air in the secondary side water supply pipe 122 and the branch pipe 150 is exhausted to the outside through the common pipe 10, the vacuum exhaust pipe 213 and the vacuum chamber 212, The fire extinguishing water is also drained to the vacuum chamber 212 when the fire extinguishing water remains in the secondary side water supply pipe 122 and the branch pipe 150.

A vacuum valve 214 for controlling the application of vacuum pressure is provided at one side of the vacuum exhaust pipe 213 and a vacuum system 215 for measuring the degree of vacuum is provided at one side of the vacuum chamber 212, A vent valve 216 is provided for recovering the vacuum chamber 212 to atmospheric pressure after completing vacuum evacuation of the vacuum chamber 122 and the branch pipe 150. Further, a vacuum chamber drain valve 217 for discharging the water for fire extinguishing water from the secondary water supply pipe 122 and the branch pipe 150 is further provided at a lower end of the vacuum chamber 212. In addition, a vacuum tube 218 is provided between the vacuum pump 211 and the vacuum chamber 212.

Next, the impregnation device 220 includes an impregnation tank 221, an impounding pump 222, and an impounding pipe 223. The sucking tank 221 stores the sucking water and the sucking pump 222 is provided in the sucking tank 221 so as to be submerged in the sucking water to supply the sucking water to the sucking pipe 223 and the common pipe 10 To the secondary water supply pipe (122) and the branch pipe (150) of the wet sprinkler device. The sucking pipe 223 is provided between the sucking pump 222 and the common pipe 10 and a sucking valve 224 is provided at one side of the sucking pipe 223 for controlling whether the sucking water is supplied or not.

A dissolved oxygen scavenger supply device 225 is provided on one side of the uptake tank 221. The oxygen scavenger supply 225 appendix tank sodium sulfite (Na ₂ SO ₃₎ or sodium sulphite (Na ₂ SO ₃₎ An apparatus for supplying, sodium sulfite (Na ₂ SO ₃₎ or sodium sulphite (Na ₂ SO ₃ are supplied to the secondary side water supply pipe 122 and the branch pipe 150 together with the water for impregnation to remove the dissolved oxygen present in the secondary side water supply pipe 122 and the branch pipe 150.

As previously described for the role of sodium sulphate (and sodium hydrogen sulphite), sodium sulphite contributes to the dissolved oxygen removal reaction and the copper oxide reduction reaction.

Specifically, it is as follows. On the inner walls of the secondary side water supply pipe 122 and the branch pipe 150 made of copper (Cu), copper (II) oxide (CuO) having a maximum thickness of 20 탆 is present. Hereinafter, the secondary water supply pipe 122 and the branch pipe 150 will be referred to as "copper pipe" for convenience of explanation.

When copper (II) oxide (CuO) is present in a copper pipe, sodium sulfite (Na ₂ SO ₃ ) or sodium hydrogensulfite (NaHSO ₃ ) chemically reacts with copper oxide (II) (CuO) in addition to reaction with dissolved oxygen (See equations 4 and 5). Therefore, when sodium sulfite (Na ₂ SO ₃ ) or sodium hydrogensulfite (NaHSO ₃ ) is added to remove dissolved oxygen in the copper pipe, a considerable amount of sodium sulfite (Na ₂ SO ₃ ) or sodium hydrogen sulfite (NaHSO ₃ ) (Na ₂ SO ₃ ) or sodium hydrogensulfite (NaHSO ₃ ), the dissolved oxygen removal efficiency becomes insignificant.

Thus, the present invention is a copper oxide (II) (CuO) a copper oxide (I) sodium sulfite (Na ₂ SO ₃₎ or sodium bisulfite (NaHSO ₃₎ required to return to (Cu ₂ O) present in the copper pipes (Na ₂ SO ₃ ) or sodium hydrogensulfite (NaHSO ₃ ) corresponding to a value exceeding the calculated concentration, for example, 1.5 times as much as the concentration of sodium sulfite (Na ₂ SO ₃ ) ₂ SO ₃ ) or sodium hydrogen sulfite (NaHSO ₃ ) is minimized. That is, the concentration of sodium sulfite (Na ₂ SO ₃ ) or sodium hydrogensulfite (NaHSO ₃ ) required for the reduction reaction of copper (II) oxide (CuO) to copper oxide (I) (Cu ₂ O) (II) (CuO) present in the copper pipe by injecting sodium sulfite (Na ₂ SO ₃ ) or sodium hydrogensulfite (NaHSO ₃ ), which is 1.5 times the concentration of the copper oxide (I) (Cu ₂ O) as well as contributing sufficiently to the dissolved oxygen removal reaction to improve the removal efficiency of dissolved oxygen by sodium sulfite or sodium bisulfite.

The minimum concentration of the copper oxide (II) (CuO), copper oxide (I) sodium sulfite (Na ₂ SO ₃₎ or sodium bisulfite (NaHSO ₃₎ required to return to (Cu ₂ O) to present in the copper pipe is as follows: It is calculated through the same process.

For the reduction reaction of copper (II) oxide (CuO) to copper oxide (I) (Cu ₂ O) as shown in Formula 4, 1 mole of sodium sulfite (Na ₂ SO ₃ ) is required. In addition, the required sodium sulphate volume in the copper piping is summarized as πr ² ㅧ ㅧ ρ _H2O ㅧ X _Na2SO3 / M _Na2SO3 , and the copper oxide (II) (CuO) volume in the copper pipe is 2πr ㅧ t ㅧ ㅧ _{Cu CuO} / M _CuO . The mass fraction of sodium sulphate (X _Na2SO3 ) in digestion water is summarized as a function of the thickness t of copper oxide (II) and the inner diameter r of the pipe. When using sodium bisulfite (NaHSO _3), the weight fraction of (X _NaHSO3) of sodium bisulfite is calculated through the expression (8) and (9) below.

(Equation 6) πr ² ㅧ l ㅧ ρ _H2O ㅧ X _Na2SO3 / M _Na2SO3 : 2 πr ㅧ t ㅧ l ㅧ _{ρ CuO / M CuO = 1:} 2

(Equation 7) X _Na2SO3 ? 2.53? T / r

(r is the radius of copper pipe in mm, t is the thickness of the CuO film, ρ _CuO is the density of the CuO film (6.35 g / cm ³ ), ρ _H2O is the density of water (1 g / cm ³ ), M _CuO is the molecular weight of CuO 316 g / mol), 1 is the length of the copper pipe, M _Na2SO3 is the molecular weight of the sodium sulfite (126 g / mol), X _Na2SO3 is the mass fraction of sodium sulfite in the digestion water)

(Equation 8) πr ² l ㅧ ㅧ ρ _H2O ㅧ X _NaHSO3 / M _NaHSO3: 2 πr ㅧ t ㅧ l ㅧ _{ρ CuO / M CuO = 1:} 2

(Equation 9) X _NaHSO3 ? 2.09? T / r

(r is the radius of copper pipe in mm, t is the thickness of the CuO film, ρ _CuO is the density of the CuO film (6.35 g / cm ³ ), ρ _H2O is the density of water (1 g / cm ³ ), M _CuO is the molecular weight of CuO 316g / mol), l is the molecular weight of the sodium length, M _NaHSO3 is hydrogen sulfite of copper tubing (104g / mol), X _NaHSO3 is of sodium bisulfite in the fire-fighting water weight fraction)

The mass fraction (X _Na2SO3 ) or sodium bisulfite (X _NaHSO3 ) of the sodium sulfite in the digestion water is calculated through Equations 7 and 9 and the mass fraction of sodium sulfite in the calculated digestion water (X _{Na 2 SO 3} ) or sodium bisulfite (X _{NaHSO 3} ), for example, 1.5 times the amount of sodium sulfite or sodium bisulfite added to the water for digestion, most of the copper oxide (II ) (CuO) to copper oxide (I) (Cu ₂ O), and dissolved oxygen in the copper pipe can be removed.

Table 1 below shows the minimum concentrations of sodium sulfite and sodium hydrogensulfite required according to the thickness of copper (II) oxide when the inner diameter of the pipe is 26 mm, and is calculated through Equation 7 and Equation 9. These sodium sulfite and The minimum concentration of sodium bisulfite is about 20 times the amount put in to prevent boiler corrosion.

≪ Concentration (%) of sodium sulfite and sodium hydrogen sulfite required according to copper (II) oxide thickness & Thickness (탆) of copper (II) oxide film 5 10 20 Minimum Sodium Sulfate Concentration (%) 0.1 0.2 0.4 Minimum sodium bisulfite concentration (%) 0.08 0.16 0.32

9 (a) is a view after the corroded copper digestion pipe is immersed in an aqueous sodium sulfite solution for 4 months, and FIG. 9 (b) shows a state in which the copper (II) oxide film formed inside the copper digestion pipe is replaced by sodium sulfite SEM photographs reduced to copper (I) partially dense structure and EDS analysis results at two locations are shown. Referring to FIG. 9 (a), it can be seen that the cut surface of the copper fire extinguishing pipe is glazed without corroding, showing that the dissolved oxygen concentration is kept very low and the corrosion is stopped. As shown in FIG. 10, the sodium sulfite aqueous solution having a concentration calculated by the above method was placed in a sprinkler copper pipe which had undergone significant corrosion and was maintained for 4 months. Then, dissolved oxygen in the copper pipe was measured using a dissolved oxygen concentration meter As a result, it can be seen that the dissolved oxygen concentration is maintained at a level that can not be measured by the dissolved oxygen concentration measuring device (0.0 ppm).

As described above, the drainage, exhaust, and water-filling device for a wet sprinkler device according to an embodiment of the present invention is described, and the optimal amount of sodium sulfite (or sodium bisulfite) supplied to the filling tank has been described. Next, a wet sprinkler device in which a drain, an exhaust, and an apposition device for a wet sprinkler device according to an embodiment of the present invention are selectively detached will be described.

Referring to FIG. 2, the wet sprinkler device includes a water supply device 110 and a water supply pipe 120. The water supply device 110 stores fire water and supplies fire water to the water pipe 120 and the water pipe 120 supplies fire water to the sprinkler head 160.

A check valve 130 is provided at one point of the water supply pipe 120 and a water supply pipe 120 at a front end of the check valve 130, that is, a water supply device 110 and a check valve 130 And the water supply pipe 120 at the rear end of the check valve 130 is referred to as a secondary water supply pipe 122. The water supply pipe 120, The check valve 130 is selectively opened only in the direction of the secondary side water supply pipe 122 and the opening and closing of the check valve 130 is interlocked with the pressure difference between the primary side water supply pipe 121 and the secondary side water supply pipe 122 do. That is, the first pressure gauge 141 and the second pressure gauge 142 are provided in the primary side water supply pipe 121 and the secondary side water supply pipe 122, respectively, and the pressure difference between the first pressure gauge 141 and the second pressure gauge 142 When the set reference value is exceeded, the check valve 130 is opened. The first pressure gauge 141 is provided on one side of the first pressure gauge valve 143 and the second pressure gauge 142 is provided on one side of the second pressure gauge valve 144. A water supply valve 123 is provided at one side of the primary side water supply pipe 121 for selectively opening and closing the supply of water for fire extinguishing water from the water supply device 110 to the water supply pipe 120.

A branch pipe 150 branched from the secondary pipe 122 is provided at one end of the secondary pipe 122 and a sprinkler head 160 is installed at one side of the branch pipe 150 to discharge the pipe water . The branch pipe 150 may be composed of a combination of the main pipe 151 and the auxiliary pipe 152, if necessary. In addition, the secondary side water supply pipe 122 may extend and be connected to the test pipe 180. The test pipe 180 is used to check whether the wet sprinkler device is operating normally or not, and may be connected to the main water pipe 190. A test valve 181, a test pressure gauge 182, and a test pressure gauge valve 183 are provided on one side of the test pipe 180.

On the other hand, a drain pipe 170 is provided at one side of the secondary side water supply pipe 122. The drain pipe 170 is branched from the secondary pipe 122 in the same manner as the branch pipe 150. The drain pipe 170 is basically connected to the secondary pipe for adjusting the water pressure in the secondary pipe 122 122 for draining water for fire extinguishing or discharging fire extinguishing water for washing the branch pipe 150 and the check valve 130. The drain pipe 170 is extended to be connected to the main drain pipe 190 and a drain valve 171 is provided at one side of the drain pipe 170.

In the wet sprinkler device having the above-described configuration, the drain, the exhaust and the water-collecting device for the wet sprinkler device according to the embodiment of the present invention are provided in a manner to be selectively attached to and detached from one side of the secondary water pipe of the wet sprinkler device. Specifically, as described above, the common piping of the drain, the exhaust, and the sucking device for the wet sprinkler device is connected to the secondary supply pipe of the wet sprinkler device. In one embodiment, the common pipe is connected to the second pressure gauge A valve or a common pipe connecting valve.

Next, the operation of the drainage, exhaust, and water supply device for a wet sprinkler device according to an embodiment of the present invention will be described.

According to the drainage, drainage, and drainage device for a wet sprinkler device according to an embodiment of the present invention, sequential progression of draining, exhausting, and filling of a wet sprinkler device is possible. First, the drainage process will be described as follows.

In the state where the common piping 10 of the drainage, exhaust, and the filling device for the wet sprinkler device is connected to the secondary-side water supply pipe 122 of the wet sprinkler device, drainage by gravity drop is induced. More specifically, the water discharge valve 171 and the test valve 181 of the wet sprinkler device are opened so that the fire extinguishing water remaining in the secondary water supply pipe 122 and the branch pipe 150 is discharged to the drain pipe 170 and the test pipe (Not shown).

The water supply valve 123 is shut off and a high pressure inert gas or a high pressure gas is supplied through the high pressure gas supply device 230 in a state in which one of the drain valve 171 and the test valve 181 is opened, The compressed air is injected into the secondary side water supply pipe 122 and the branch pipe 150 via the high-pressure gas supply pipe 231 and the common pipe 10. The fire extinguishing water remaining in the secondary side water supply pipe 122 and the branch pipe 150 by the high pressure gas injection is forcibly drained through the drain pipe 172 or the test pipe 180 (see FIG. At this time, the vacuum valve 214 of the vacuum exhaust device 210 and the sucking valve 224 of the sucking device 220 are shut off. When the inert gas is used as the high-pressure gas, inert gas is injected to discharge the residual digestion water, and then inert gas is additionally injected into the secondary-side water supply pipe 122 and the branch pipe 150, and the secondary- It is also possible to maintain the state where the inert gas is filled in the branch pipe 150. When the subsequent exhaust process is performed in this state, the oxygen removal in the secondary pipe 122 and the branch pipe 150 is more completely performed .

When the drainage due to the gravity drop and the forced draining by the high-pressure gas are completed, the evacuation process using the vacuum exhaust apparatus 210 proceeds (see FIG. 3B).

The vacuum pump 211 is operated while the water supply valve 123, the drain valve 171 and the test valve 181 of the wet sprinkler device are all shut off. The air remaining in the secondary side water supply pipe 122 and the branch pipe 150 and the check valve 130 is exhausted to the vacuum chamber 212 via the common pipe 10 and the vacuum exhaust pipe 213. When the vacuum evacuation process is completed, the vent valve 216 is opened to return the vacuum chamber 212 to atmospheric pressure. On the other hand, when the digestion water remains in the water supply pipe 122 and the branch pipe 150 in the vacuum evacuation process, the residual digestion water is drained to the vacuum chamber. In the exhaust process using the vacuum exhaust apparatus 210, all the valves of the high-pressure gas supply apparatus 230 and the injector apparatus 210 are shut off.

When the evacuation process using the vacuum evacuation device 210 is completed, an appendage process proceeds (see FIG. 3C).

The water supply valve 123, the drain valve 171 and the test valve 181 of the wet sprinkler device are shut off, and the secondary water supply pipe 122 and the branch pipe 150 are attached to the water supply pipe. Concretely, the water supply water in the water supply tank 221 is introduced into the secondary water supply pipe 122 and the branch pipe 150 through the water pipe 223 and the common pipe 10 through the water pump 222. At this time, all the valves of the high-pressure gas supply device 230 and the vacuum exhaust device 210 are shut off.

A predetermined amount of sodium sulfite or sodium hydrogensulfite is preliminarily introduced into the water for introduction into the secondary water supply pipe 122 and the branch pipe 150 through the dissolved oxygen scavenger supply device 225. [ The amount of sodium sulfite or the amount of sodium hydrogen sulfite to be added to the sucking water is determined by the amount of copper (II) oxide (CuO) present in the copper pipes (the secondary supply pipe 122 and the branch pipe 150). Specifically, the mass fraction (X _{Na 2 SO 3} ) (or the sodium fraction of sodium bisulfite (X _{NaHSO 3} )) of the sodium sulfite is calculated through the above formula 7 (or formula 9) and the mass of the sodium sulfite A sodium sulfite (or sodium bisulfite) corresponding to a value exceeding a fraction (X _{Na 2 SO 3} ) (or a mass fraction of sodium bisulfite (X _{NaHSO 3} ), for example, 1.5 times) is added to the water for appendix.

When the drainage process, the evacuation process, and the filling process are completed as described above, the drainage, exhaust, and / or water supply devices for the wet sprinkler device according to the embodiment of the present invention are detached from the water supply pipe 122 on the secondary side of the wet sprinkler device. When the common pipe 10 is connected to the second pressure gauge valve, the common pipe 10 is detached from the second pressure gauge valve 144 and the second pressure gauge 142 is connected to the detached portion of the common pipe 10 . When the common piping 10 is connected to the connection valve for connecting the common piping 10 of the secondary piping 122, the common piping 10 is detached from the common piping connection valve. Further, a flexible pipe is applied to one section of the common pipe 10, and the flexible pipe is detached when the flexible pipe is connected to the second pressure gauge valve or the common pipe connecting valve.

As described above, the construction and operation of the drainage, drainage, and drainage device for a wet sprinkler device according to one embodiment of the present invention have been described.

On the other hand, in the above-described embodiment, the configuration of the high-pressure gas supply device 230 may be omitted as shown in Fig. In this case, the forced drainage process by the high-pressure gas supply device 230 is omitted, and the drainage generated incidentally in the exhaust process by the vacuum exhaust device 210 may correspond to the drainage process. That is, when the configuration of the high-pressure gas supply device 230 is omitted, the evacuation and evacuation process is simultaneously performed by the vacuum evacuation device 210.

10: common piping 11, 12: adapter
110: water supply device 120: water supply pipe
121: Primary supply pipe 122: Secondary supply pipe
123: water supply valve 130: check valve
141: first pressure gauge 142: second pressure gauge
143: first pressure gauge valve 144: second pressure gauge valve
150: Branch 151: Main branch
152: auxiliary branch pipe 160: sprinkler head
170: Drain pipe 171: Drain valve
180: Test piping 181: Test valve
182: Test pressure gauge 182: Test pressure gauge valve
190: Main drain
210: Vacuum exhaust device 211: Vacuum pump
212: Vacuum chamber 213: Vacuum exhaust pipe
214: vacuum valve 215: vacuum gauge
216: Vent valve 217: Vacuum chamber drain valve
218: vacuum tube 220: appendix
221: an appendix tank 222: an appendix pump
223: Suction piping 224: Suction valve
225: Dissolved Oxygen Removal Feeder 230: High Pressure Gas Feeder
231: high-pressure gas supply pipe 232: high-pressure gas supply valve

Claims (12)

A common pipeline which is selectively detachable from the secondary side water supply pipe of the wet type sprinkler device into which the digestive water is introduced;
A vacuum evacuating device for evacuating and discharging the extinguishing water and air remaining in the secondary side water supply pipe and the branch pipe of the wet sprinkler device through the common pipe; And
An appratus for supplying sucking water to the secondary water supply pipe and the branch pipe through the common pipe;
And a dissolved oxygen scavenger supply device for supplying sodium hydrosulfide (Na ₂ SO ₃ ) or sodium hydrogensulfite (NaHSO ₃ ) to the impregnation device,
The concentration of sodium sulfite in the digestion water supplied to the secondary supply pipe and the branch pipe from the appendix exceeds the mass fraction (X _{Na 2 SO 3} ) of sodium sulfite or the mass fraction (X _{NaHSO 3} ) of sodium hydrogen sulfite, (X _{Na 2 SO 3} ) or sodium hydrogen sulfite (X _{NaHSO 3} ) is calculated from the following equation (1) or ( ₂ ).
(Formula 1) πr ² ㅧ l ㅧ ρ _H2O ㅧ X _Na2SO3 / M _Na2SO3 : 2 πr ㅧ t ㅧ l ㅧ _{ρ CuO / M CuO = 1:} 2
(r is the radius of copper pipe in mm, t is the thickness of the CuO film, ρ _CuO is the density of the CuO film (6.35 g / cm ³ ), ρ _H2O is the density of water (1 g / cm ³ ), M _CuO is the molecular weight of CuO 316 g / mol), 1 is the length of the copper pipe, M _Na2SO3 is the molecular weight of the sodium sulfite (126 g / mol), X _Na2SO3 is the mass fraction of sodium sulfite in the digestion water)
(Equation ²⁾ πr 2 l ㅧ ㅧ ρ _H2O ㅧ X _NaHSO3 / M _NaHSO3: 2 πr ㅧ t ㅧ l ㅧ _{ρ CuO / M CuO = 1:} 2
(r is the radius of copper pipe in mm, t is the thickness of the CuO film, ρ _CuO is the density of the CuO film (6.35 g / cm ³ ), ρ _H2O is the density of water (1 g / cm ³ ), M _CuO is the molecular weight of CuO 316g / mol), l is the molecular weight of the sodium length, M _NaHSO3 is hydrogen sulfite of copper tubing (104g / mol), X _NaHSO3 is of sodium bisulfite in the fire-fighting water weight fraction)
A common pipeline which is selectively detachable from the secondary side water supply pipe of the wet type sprinkler device into which the digestive water is introduced;
A high-pressure gas supply device for injecting high-pressure gas into the secondary-side water supply pipe through the common pipe, thereby forcibly draining the secondary water supply pipe and the remaining water in the branch pipe;
A vacuum evacuating device for evacuating and discharging the extinguishing water and air remaining in the secondary side water supply pipe and the branch pipe of the wet sprinkler device through the common pipe; And
An appratus for supplying sucking water to the secondary water supply pipe and the branch pipe through the common pipe;
And a dissolved oxygen scavenger supply device for supplying sodium hydrosulfide (Na ₂ SO ₃ ) or sodium hydrogensulfite (NaHSO ₃ ) to the impregnation device,
The concentration of sodium sulfite in the digestion water supplied to the secondary supply pipe and the branch pipe from the appendix exceeds the mass fraction (X _{Na 2 SO 3} ) of sodium sulfite or the mass fraction (X _{NaHSO 3} ) of sodium hydrogen sulfite, (X _{Na 2 SO 3} ) or sodium hydrogen sulfite (X _{NaHSO 3} ) is calculated from the following equation (1) or ( ₂ ).
(Formula 1) πr ² ㅧ l ㅧ ρ _H2O ㅧ X _Na2SO3 / M _Na2SO3 : 2 πr ㅧ t ㅧ l ㅧ _{ρ CuO / M CuO = 1:} 2
(r is the radius of copper pipe in mm, t is the thickness of the CuO film, ρ _CuO is the density of the CuO film (6.35 g / cm ³ ), ρ _H2O is the density of water (1 g / cm ³ ), M _CuO is the molecular weight of CuO 316 g / mol), 1 is the length of the copper pipe, M _Na2SO3 is the molecular weight of the sodium sulfite (126 g / mol), X _Na2SO3 is the mass fraction of sodium sulfite in the digestion water)
(Equation ²⁾ πr 2 l ㅧ ㅧ ρ _H2O ㅧ X _NaHSO3 / M _NaHSO3: 2 πr ㅧ t ㅧ l ㅧ _{ρ CuO / M CuO = 1:} 2
(r is the radius of copper pipe in mm, t is the thickness of the CuO film, ρ _CuO is the density of the CuO film (6.35 g / cm ³ ), ρ _H2O is the density of water (1 g / cm ³ ), M _CuO is the molecular weight of CuO 316g / mol), l is the molecular weight of the sodium length, M _NaHSO3 is hydrogen sulfite of copper tubing (104g / mol), X _NaHSO3 is of sodium bisulfite in the fire-fighting water weight fraction)
The apparatus according to claim 1 or 2, wherein the common pipe is selectively attachable to and detachable from a second pressure gauge valve or a common pipe connection valve provided in the secondary side water supply pipe.
The apparatus according to claim 3, wherein when the common pipe is connected to the second pressure gauge valve, the common pipe is connected to a portion where the second pressure gauge of the second pressure gauge valve is provided. Appendage device.
The vacuum degassing apparatus according to claim 1 or 2, wherein the vacuum evacuation apparatus comprises a vacuum pump, a vacuum chamber, and a vacuum evacuation pipe,
The vacuum exhaust pipe connects between the common pipe and the vacuum chamber,
When the vacuum pump is operated, the air in the secondary side water supply pipe and the branch pipe are common piping. Wherein the water is exhausted to the outside via a vacuum exhaust pipe and a vacuum chamber, and when the water for fire extinguishing remains in the secondary water supply pipe and the branch pipe, the water for fire extinguishing water is drained to the vacuum chamber.
6. The vacuum cleaner according to claim 5, wherein a vacuum valve is provided at one side of the vacuum exhaust pipe, a vacuum system for measuring the degree of vacuum is provided at one side of the vacuum chamber, and a vent valve for recovering the vacuum chamber to atmospheric pressure is provided, And a vacuum chamber drain valve for discharging the water for fire extinguishing water discharged from the secondary side water supply pipe and the branch pipe is provided at the lower side of the water discharge, exhaust and water filling device for the wet sprinkler device.
[3] The apparatus according to claim 1 or 2, wherein the apposition device comprises an apposition tank, an apposition pump, and an apposition pipe,
The impregnation tank stores impounded water, and the impoundment pump is provided in a form of being submerged in the impounded water in the impounded water tank to supply the impounded water to the secondary water supply pipe and the branch pipe of the wet sprinkler device via the impounded water pipe and the common pipe , And the sucking pipe is provided between the sucking pump and the common pipe.
4. The method of claim 3, wherein one section of the common piping is formed of a flexible tube,
One end of the flexible pipe is connected to a common pipe connected valve provided at one side of the second pressure gauge valve or the secondary pipe, and the other end of the flexible pipe is connected to the common pipe, and both ends of the flexible pipe are connected to the second pressure gauge valve A common piping connected valve provided at one side of the secondary side water supply pipe), and a common pipe and an adapter.
A method for drainage, exhaust and an appendix of a wet sprinkler device using drainage, exhaust and an apparati of a wet sprinkler device according to claim 1,
With the common piping of the drainage, exhaust and impregnation device for the wet sprinkler device connected to the secondary supply line of the wet sprinkler device, open the drain valve and the test valve of the wet sprinkler device to remove the residual water from the secondary supply line and branch line Draining through the drain pipe and the test pipe by gravity drop;
A step of exhausting the air remaining in the secondary pipe and the branch pipe through a vacuum pump to the outside through a common pipe, a vacuum exhaust pipe, and a vacuum chamber in a state in which both the water supply valve, the drain valve and the test valve of the wet sprinkler device are shut off ; And
In the wet sprinkler system, in the state where the water supply valve, the drain valve and the test valve are all shut off, the water for the water for filling the water in the filling tank is attached to the secondary water supply pipe and the branch pipe which are vacuumed through the filling pipe, the common pipe, And a drain, an exhaust, and an appendage of the wet sprinkler device.
A method of drainage, exhaust and an appendix of a wet sprinkler device using drainage, exhaust and an apparati of the wet sprinkler device of claim 2,
With the common piping of the drainage, exhaust and impregnation device for the wet sprinkler device connected to the secondary supply line of the wet sprinkler device, open the drain valve and the test valve of the wet sprinkler device to remove the residual water from the secondary supply line and branch line Draining through the drain pipe and the test pipe by gravity drop;
The water supply valve of the wet sprinkler device is shut off and either the drain valve or the test valve is opened and the high pressure gas is injected into the secondary side supply pipe and the branch pipe via the high pressure gas supply pipe and the common pipe through the high pressure gas supply device, Forced drainage of residual water in the secondary water supply pipe and branch pipe through the test pipe;
A step of exhausting the air remaining in the secondary pipe and the branch pipe through a vacuum pump to the outside through a common pipe, a vacuum exhaust pipe, and a vacuum chamber in a state in which both the water supply valve, the drain valve and the test valve of the wet sprinkler device are shut off ; And
In the wet sprinkler system, in the state where the water supply valve, the drain valve and the test valve are all shut off, the water for the water for filling the water in the filling tank is attached to the secondary water supply pipe and the branch pipe which are vacuumed through the filling pipe, the common pipe, And a drain, an exhaust, and an appendage of the wet sprinkler device.
11. The method according to claim 9 or 10, wherein, in the step of exhausting the air remaining in the secondary side water supply pipe and the branch pipe by a vacuum pump,
And the remaining water for digestion is drained to the vacuum chamber when the digestion water remains in the secondary water supply pipe and the branch pipe.
12. A device according to any one of claims 9 to 11, wherein the wet sprinkler device
A water supply pipe for supplying water for fire extinguishing water to the sprinkler head and divided into a primary water supply pipe at the front end and a secondary water supply pipe at the rear end with respect to the check valve and a water supply valve provided at the primary water supply pipe A sprinkler head provided at one end of the branch pipe for spraying the extinguishing water to the outside and a sprinkler head provided at one end of the secondary water supply pipe, A drain pipe, a drain valve provided in the drain pipe, a test pipe in a form branched at one end of the branch pipe, and a test valve at one side of the test pipe. And an appendage method.

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