KR20220078137A - Dry and wet type valve having reducible a pressure - Google Patents

Abstract

The present invention relates to a valve applied to a sprinkler facility, and in particular, the differential pressure ratio can be formed larger than that of a dry valve, so that the problems and disadvantages of wet and dry valves can be overcome and sprayed from a sprinkler regardless of the number of floors of a building To equalize the pressure of fire extinguishing water, an inlet to which the primary side pipe to which the fire water is supplied is connected is formed at the upper end, and an outlet is formed at the lower end to which the secondary side pipe filled with compressed air or pressurized water is connected; It forms a cylindrical shape open in the vertical direction and is provided inside the body spaced apart from the side wall of the body to form a flow path between the side wall of the body, and an inflow path communicating with the flow path is formed through the upper part, and the inflow path is formed through the lower part a guide cap through which an outlet passage communicating with the flow passage is formed; a partition plate in the form of a plate and fixed at the center in the longitudinal direction of the guide cap to partition the upper and lower spaces, and having an adjustment hole in the center; A piston that forms a cylindrical shape open in the vertical direction and is provided on the upper side of the partition plate, which can block the inflow path while sealing the upper part of the guide cap; a return spring provided on the upper side of the partition plate to apply an elastic force to the piston; Having buoyancy and forming a cylinder having a diameter corresponding to the inner diameter of the guide cap, it is provided above the outlet path from the lower side of the partition plate, and the elastic force applied upward by the pressure reducing spring provided at the lower side, and the secondary side pipe buoyancy sphere affected by the pressure of; A piston shaft provided to pass through the control hole and connecting the piston and the buoyancy ball; a fine gap is formed between the adjustment hole and the piston shaft, so that the buoyancy force by the buoyancy ball and the elastic force of the return spring and the decompression spring When a fire occurs while the piston blocks the inflow path by the When the buoyancy ball moves downward, the piston moves together and the inflow path is opened, so fire water is supplied to the secondary side pipe through the inflow path, the flow path, and the outflow path, and is ejected through the sprinkler. It relates to a dry-wet valve having a pressure reducing function, characterized in that the function is made.

Description

Dry and wet type valve having reducible a pressure

The present invention relates to a valve applied to sprinkler equipment, and more particularly, to a dry-wet valve having a pressure reducing function with the functions of a dry valve, a wet valve, and a pressure reducing valve.

In general, sprinkler equipment is a facility that initially extinguishes a fire using fire water when a fire occurs. installed in buildings.

The sprinkler equipment has a wet, dry, preparatory operation, and a blitzkrieg type. Among them, wet sprinkler equipment is the most commonly used method, and pressurized water is always filled in the primary and secondary side pipes, so when a fire occurs, the head is opened by heat and pressurized water is sprayed. While it has the advantage that it has a simple structure and can be digested immediately, there is a disadvantage that it is not suitable for a place where there is a risk of freezing. In addition, the wet valve applied to the wet sprinkler facility has the same primary water supply pressure and secondary water supply pressure, so high pressure must be maintained on both sides. There is a technical limitation that it cannot be lowered.

In addition, the dry sprinkler installs a dry valve in the middle of the pipeline, fills the secondary side with compressed air using an automatic air compressor and pressurized water on the primary side, respectively, and when the head is opened by heat, the secondary side compressed air is released. A pressure drop occurs, and at this time, pressurized water from the primary side flows into the secondary side, and watering starts. It can be installed in places where there is a risk of freezing, but there are disadvantages in that the fire-extinguishing time is somewhat delayed and it is more expensive than wet equipment. In a dry valve applied to such a dry sprinkler facility, the ratio of the primary side water supply pressure and the secondary side air supply pressure is called a differential pressure ratio, and the differential pressure ratio is usually about 3 to 4:1. However, depending on the installation environment, it is necessary to lower the pressure of the secondary side pipe by increasing the differential pressure ratio. For this purpose, there is a technical limitation in making the size of the valve large.

In addition, since the pressure applied to the sprinklers installed on each floor is different according to the trend of higher-rise buildings, when a fire occurs on the lower floor, the water in the water tank is rapidly depleted by spraying more water than necessary due to the high pressure due to the high pressure. occurs

1. Republic of Korea Patent No. 10-0498639 'Dry valve for sprinkler equipment'

The present invention is intended to solve the above problems, and since the differential pressure ratio can be made larger than that of the dry valve, the problems and disadvantages of the wet valve and the dry valve can be overcome, and fire extinguishing water sprayed from the sprinkler regardless of the number of floors of the building An object of the present invention is to provide a dry-wet combination valve having a pressure reducing function that can equalize the pressure of the .

In the present invention for achieving the above object, the dry-wet valve having a pressure reducing function has an empty inside and an inlet to which the primary side pipe to which firefighting water is supplied is connected is formed at the upper end, and the secondary side pipe is filled with compressed air or pressurized water at the lower end a body formed with an outlet to which it is connected; It forms a cylindrical shape open in the vertical direction and is provided inside the body spaced apart from the side wall of the body to form a flow path between the side wall of the body, and an inflow path communicating with the flow path is formed through the upper part, and the inflow path is formed through the lower part a guide cap through which an outlet passage communicating with the flow passage is formed; a partition plate in the form of a plate and fixed at the center in the longitudinal direction of the guide cap to partition the upper and lower spaces, and having an adjustment hole in the center; A piston that forms a cylindrical shape open in the vertical direction and is provided on the upper side of the partition plate, which can block the inflow path while sealing the upper part of the guide cap; a return spring provided on the upper side of the partition plate to apply an elastic force to the piston; Having buoyancy and forming a cylinder having a diameter corresponding to the inner diameter of the guide cap, it is provided above the outlet path from the lower side of the partition plate, and the elastic force applied upward by the pressure reducing spring provided at the lower side, and the secondary side pipe buoyancy sphere affected by the pressure of; A piston shaft provided to pass through the control hole and connecting the piston and the buoyancy ball; includes, a minute gap is formed between the adjustment hole and the piston shaft.

In addition, the buoyancy sphere further includes a spring support provided on the upper side of the outlet to support the pressure reducing spring placed on the upper side, wherein the spring support is provided in a ring shape having a diameter corresponding to the inner diameter of the guide cap. It may include a ring and a plurality of support rods radially formed from the center of the support ring.

In addition, the spring support may be fixed after changing the position in the vertical direction.

In addition, the guide cap may have a screw thread formed on its inner circumferential surface from the lower end to a predetermined point on the upper side of the outflow path, and a screw thread corresponding to the screw thread formed on the inner circumferential surface of the guide cap may be formed on the outer circumferential surface of the support ring.

In addition, the body is provided with a warning device for sounding a warning broadcast and an emergency bell on the outside, the partition plate is provided with a sensor for detecting the separation from the buoyancy ball, the buoyancy ball is spaced apart from the partition plate by the sensor When this is detected, the warning device may be activated.

In addition, the guide cap 20 may be formed in a ring shape and provided with a bump 24 and a fixed O-ring 1 along the inner periphery to seal the inflow path.

In addition, the thickness of the outer wall of the piston is formed to be thicker than the protruding length of the bump, and the part located on the inner side of the lower end of the piston is in the form of an upwardly slanted shape, and the upper end of the outer wall of the piston corresponds to the shape of the lower end of the bump can be formed.

In addition, an openable and openable fluid outlet at a lower point adjacent to the inflow path and an openable and openable air outlet at a central point in the longitudinal direction may be formed through the sidewall of the body.

In addition, the upper portion of the guide cap, an inner peripheral surface adjacent to the inflow path may be depressed inwardly to form a jamming preventing groove.

According to the present invention, when a fire occurs in a state in which the piston blocks the inflow path by the buoyancy force of the buoyancy ball and the elastic force of the return spring and the pressure reducing spring, the sprinkler is opened and the pressure of the secondary side pipe is lowered. When the fire extinguishing water supplied through the pipe moves through the minute gap and pressurizes the buoyancy ball, the piston moves together and the inflow path is opened, so that the fire water passes through the inflow path, the flow path, and the outflow path to the secondary side. It is supplied through a pipe and blows out through a sprinkler, so it can extinguish a fire. At the same time, the fire water supplied to the secondary side pipe applies pressure to the buoyancy port, and the pressure reducing valve function is performed.

In this invention, since the ratio of the cross-sectional area of the minute gap to the cross-sectional area of the buoyancy sphere is the differential pressure ratio, the differential pressure ratio can be increased, and the problems and disadvantages of the wet valve and the dry valve can be overcome, and the pressure reduction is achieved through the adjustment of the pressure reducing spring. can be done That is, by maintaining the low pressure of the secondary side pipe, it is possible to prevent the aging of the pipe, quickly extinguish the fire, and spray the fire extinguishing water at a constant pressure through the sprinkler regardless of the number of floors in the building.

1 is a longitudinal sectional view showing the structure of a dry-wet valve having a pressure reducing function according to the present invention;
Figure 2 is a partial enlarged view of A in Figure 1,
3 is a perspective view showing a piston applied to a dry-wet combination valve having a pressure reducing function according to the present invention;
4 is a perspective view showing a buoyancy ball applied to a dry-wet valve having a pressure reducing function according to the present invention;
5 is a perspective view showing a piston shaft applied to a dry-wet valve having a pressure reducing function according to the present invention;
Figure 6 is a partial enlarged view of B of Figure 1,
7 is a perspective view showing a spring support applied to a dry-wet valve having a pressure reducing function according to the present invention;
8 is a perspective view showing an upper portion of a guide cap applied to a dry-wet valve having a decompression function according to the present invention;

In the present invention, the differential pressure ratio can be made larger than that of the dry valve, so that the problems and disadvantages of the wet valve and the dry valve can be overcome, and the pressure of the fire extinguishing water sprayed from the sprinkler can be equalized regardless of the number of floors of the building. a body having an empty interior and an inlet to which a primary pipe to which fire extinguishing water is supplied is connected, and an outlet to which a secondary pipe filled with compressed air or pressurized water is connected at the lower end; It forms a cylindrical shape open in the vertical direction and is provided on the inside of the body spaced apart from the side wall of the body to form a flow path between the side wall of the body, and an inflow path communicating with the flow path is formed through the upper part, and at the lower part a guide cap through which an outlet passage communicating with the flow passage is formed; a partition plate in the form of a plate and fixed at the center in the longitudinal direction of the guide cap to partition the upper and lower spaces, and having an adjustment hole in the center; A piston that forms a cylindrical shape open in the vertical direction and is provided on the upper side of the partition plate, which can block the inflow path while sealing the upper part of the guide cap; a return spring provided on the upper side of the partition plate to apply an elastic force to the piston; Having buoyancy and forming a cylinder having a diameter corresponding to the inner diameter of the guide cap, it is provided above the outlet path from the lower side of the partition plate, and the elastic force applied upward by the pressure reducing spring provided at the lower side, and the secondary side pipe buoyancy ball affected by the pressure of; A piston shaft provided to pass through the adjustment hole and connecting the piston and the buoyancy ball; but, a fine gap is formed between the adjustment hole and the piston shaft, so that the buoyancy force by the buoyancy ball and the elastic force of the return spring and the decompression spring When a fire occurs while the piston blocks the inflow path by the When the buoyancy ball moves downward, the piston moves together and the inflow path is opened, so fire water is supplied to the secondary side pipe through the inflow path, the flow path, and the outflow path, and is ejected through the sprinkler. We propose a dry-wet valve having a pressure reducing function, characterized in that the function is made.

The scope of the present invention is not limited to the embodiments described below, and various modifications may be made by those of ordinary skill in the art without departing from the technical gist of the present invention.

Hereinafter, the dry-wet valve having a pressure-reducing function according to the present invention will be described in detail with reference to the accompanying FIGS. 1 to 7 .

As shown in Fig. 1, the present invention's dry-wet valve having a decompression function includes a body 10, a guide cap 20, a partition plate 30, a piston 40, a return spring 50, and a buoyancy ball. (60), a pressure reducing spring (70), and a piston shaft (80).

The body 10 has an empty barrel shape inside, an inlet 11 to which a primary side pipe to which extinguishing water for extinguishing a fire is supplied can be connected is formed at the upper end, and a secondary side pipe filled with compressed air or pressurized water at the lower end An outlet 12 to which this is connected is formed. The sidewall of the body 10 is formed to have a larger diameter than the diameters of the inlet 11 and the outlet 12 . In addition, a bolt hole for coupling with a pipe may be formed at the ends of the inlet 11 and the outlet 12 .

The guide cap 20 has a hollow inside and forms a cylindrical shape open in the vertical direction, and is provided inside the body 10 spaced apart from the side wall of the body 10 . Accordingly, as shown in FIG. 1 , a flow path 21 is formed between the sidewall of the body 10 and the guide cap 20 . In addition, in the guide cap 20, an inflow path 22 communicating with the flow path 21 is formed on a lower side adjacent to the inlet 11 in the upper portion, and a flow path 21 and an upper side adjacent to the outlet 12 in the lower portion. The communicating outlet 23 is formed through. In addition, the upper portion of the guide cap 20, as shown in Figure 2, the inner peripheral surface adjacent to the inflow passage 22 is recessed inward, the jamming groove 25 may be formed. This jam-preventing groove 25 is a movable upper O-ring (2) and a movable lower O-ring (3) provided on the outer circumferential surface of the piston 40 blocking the inflow passage 22 when the piston 40 moves. To be easily moved together with the piston (40) without being caught on.

In addition, the guide cap 20 may be formed in a ring shape on the upper side adjacent to the inflow passage 22, as shown in FIGS. 1 and 2, and the bump 24 may protrude along the inner periphery. The bump 24 serves to seal the primary side pressurized water by inserting the fixed O-ring (1). As a specific example, as shown in FIG. 2 , the bump 24 may have a shape in which an inner portion of the lower end is slanted upward. In addition, an O-ring groove may be recessed in a portion adjacent to the guide cap 20 among the lower ends of the bump 24, and a fixed O-ring 1 may be provided in the corresponding O-ring groove.

The partition plate 30 forms a plate shape as shown in FIG. 1 and is fixed to the longitudinal center of the guide cap 20 to partition the upper and lower spaces. Accordingly, the upper space and the lower space of the guide cap 20 may have different pressures. And the control hole 31 is formed through the center of the partition plate (30).

As shown in FIGS. 1 and 3 , the piston 40 has a cylindrical shape that is opened in the vertical direction and is provided on the upper side of the partition plate 30 . Specifically, the piston 40 may have the same cylindrical shape as the inner diameter of the guide cap 20 , and may block the inflow path 22 while sealing the upper portion of the guide cap 20 . In addition, the piston 40 may be moved downward to open the inflow path 22 , and at this time, it moves while in contact with the inner side of the guide cap 20 . In addition, the piston 40 may have O-ring grooves recessed in each of the upper and lower portions of the outer peripheral surface, and a movable upper O-ring 2 and a movable lower O-ring 3 may be provided in each O-ring groove. Therefore, when the piston 40 blocks the inflow path 22 , the movable upper O-ring 2 and the movable lower O-ring 3 provided on the upper and lower portions of the outer peripheral surface of the piston 40 are connected to the prevent entry

And the piston 40 may form a cylindrical shape in which the thickness of the outer wall is thicker than the length at which the bump 24 protrudes, as shown in FIG. 1 . Accordingly, when the piston 40 blocks the inflow path 22 , the upper end of the outer wall of the piston 40 is in contact with the bump 24 . At this time, the upper end of the outer wall of the piston 40 is formed to correspond to the shape of the lower end of the bump 24 as shown in FIGS. 1 and 3 so that fire water does not flow into the gap between the piston 40 and the bump 24 . That is, the upper end of the outer wall of the piston 40 is formed so as to correspond to the lower end of the bump 24 , which is located on the inner side to form an upwardly slanted shape.

And as shown in FIG. 3, the piston 40 is formed in a ring shape and a connection protrusion 42 is provided at the center of the piston 40, and a plurality of piston spokes 41 are provided radially from the connection protrusion 42. can be formed. Accordingly, the fire extinguishing water supplied through the primary side pipe may be filled in the guide cap 20 positioned above the partition plate 30 through the space between the piston spokes 41 .

The return spring 50 is provided on the upper side of the partition plate 30 , and applies an elastic force to the piston 40 . And the decompression spring 70 is provided below the buoyancy sphere 60 to be described later, and applies an elastic force to the buoyancy sphere 60 .

The buoyancy sphere 60 forms a barrel shape having a diameter corresponding to the inner diameter of the guide cap 20 while having buoyancy, as shown in FIGS. 1 and 4 . And the buoyancy sphere 60 is provided above the outlet passage 23 from the lower side of the partition plate 30, and is affected by the elastic force applied upward by the pressure reducing spring 70 and the pressure of the secondary side pipe. In addition, an O-ring groove may be recessed in the upper outer peripheral surface of the buoyancy sphere 60 , and an O-ring 4 may be provided in the O-ring groove. When the piston 40 blocks the inflow path 22 , the buoyancy sphere 60 is preferably in contact with the partition plate 30 .

The piston shaft 80 is formed in the form of a rod having a predetermined length as shown in FIGS. 1 and 5 and is provided to pass through the adjustment hole 31, and at one end is attached to the connection protrusion 42 of the piston 40. The buoyancy ball 60 is coupled to the other end. That is, according to the movement of the buoyancy sphere 60 , the piston 40 is integrally moved with the buoyancy sphere 60 through the piston shaft 80 . Specifically, when the piston 40 and the buoyancy sphere 60 are coupled to one end and the other end of the piston shaft 80, the piston 40 blocks the inflow path 22, and the buoyancy sphere 60 is a partition plate It has a predetermined length to achieve a state in contact with (30). In particular, the piston shaft 80 in the present invention is formed to have a smaller diameter than the adjustment hole 31 as shown in FIG. For example, the diameter of the piston shaft may be 10mm, and the diameter of the adjustment hole 31 may be 10.2mm.

In the present invention as described above, in a state in which the piston 40 blocks the inflow path 22 by the buoyancy force of the buoyancy tool 60 and the elastic force of the return spring 50 and the pressure reducing spring 70, the fire When this occurs, as the pressure of the secondary side pipe is lowered as the sprinkler is opened, the fire extinguishing water supplied through the primary side pipe is moved through the fine gap between the adjustment space 31 and the piston shaft 80 to create the buoyancy tool 60. When the buoyancy port 60 is moved downward by pressurization, the piston 40 is moved together and the inflow path is opened, so that the fire water passes through the inflow path 22, the flow path 21, and the outflow path 23 to the secondary side pipe. It is supplied and ejected through a sprinkler, so that the fire can be extinguished. At the same time, the fire extinguishing water supplied to the secondary side pipe applies pressure to the buoyancy port 60, and a pressure reducing valve function is performed.

In the present invention, the ratio of the cross-sectional area of the minute gap to the cross-sectional area of the buoyancy ball 60 is the differential pressure ratio. For example, when the diameter of the piston shaft 80 is 10 mm, the cross-sectional area is 78.5 mm 2 , and the diameter of the adjustment hole 31 is In the case of 10.2mm, the cross-sectional area is 81.6714㎟, and the cross-sectional area of the minute gap is 3.1714㎟. At this time, when the diameter of the buoyancy sphere 60 is 100 mm, its cross-sectional area is 7850 mm 2 , and the differential pressure ratio is 2475:1. As described above, the present invention can increase the differential pressure ratio, thereby overcoming the problems and disadvantages of the wet valve and the dry valve. In addition, the fire extinguishing water supplied to the secondary side pipe is reduced to a pressure of 1/2475 compared to the pressure in the primary side pipe, and since the buoyancy port 60 is pressurized with the reduced pressure, it serves as a pressure reducing valve.

On the other hand, the present invention may further include a spring support 90 provided on the upper side than the outlet path 23 from the lower side of the buoyancy sphere 60 as shown in FIGS. 1 and 7 . The spring support 90 includes a support ring 91 having a ring shape having a diameter corresponding to the inner diameter of the guide cap 20 and a plurality of support rods 92 radially formed from the center of the support ring 91 . Including, the pressure reducing spring 70 is placed on the upper side of the support rod 92 is supported.

The spring support 90 is configured to be fixed after changing its position in the vertical direction, so that the elastic force applied to the buoyancy sphere 60 by the pressure reducing spring 70 can be adjusted. For example, as shown in FIG. 1 , the guide cap 20 has a screw thread formed on its inner circumferential surface from the lower end to a predetermined point on the upper side of the outflow path 23 , and the outer circumferential surface of the support ring 91 is the guide cap 20 . A thread corresponding to the thread formed on the inner circumferential surface may be formed. Accordingly, by rotating the support ring 91 to move upward or downward along the screw thread, the elastic force applied to the buoyancy ball 60 by the pressure reducing spring 70 can be adjusted. By using this, as the number of floors of a building increases or decreases, the position of the spring support 90 is changed so that fire extinguishing water of a constant pressure can be sprayed through the sprinkler regardless of the number of floors of the building.

And, as shown in Figure 1, the body 10 may be provided with a warning device 13 for sounding a warning broadcast and an emergency bell on the outside, and the partition plate 30 has a sensor for detecting the separation from the buoyancy ball 60 (32) may be provided. Accordingly, when it is sensed by the sensor 32 that the buoyancy ball 60 is spaced apart from the partition plate 30 , a fire occurs and the sprinkler is operated, so the warning device 13 may be configured to operate.

And in order to set the present invention as a dry valve or a wet valve, on the side wall of the body 10, as shown in FIG. 1, a fluid outlet 14 that can be opened and closed at a lower point adjacent to the inflow path 22 may be formed, and an openable and openable air outlet 15 may be formed through the central point in the longitudinal direction. Pressurized water may be introduced or discharged through the fluid outlet 14 , and air may be introduced or discharged through the air outlet 15 . In addition, the present invention, as shown in Figure 1, the primary side pressure gauge 5 for measuring the pressure on the upper side of the partition plate 30 in the space in the guide cap 20, and 2 for measuring the pressure on the flow path 21 It may further include a vehicle pressure gauge (6).

Looking at the setting when using as a dry valve, first, in a state in which the piston 40 blocks the inflow path 22, air is injected through the air outlet 15, then the primary side valve is opened, and the primary side pressure gauge ( Control the pressure while comparing the pressure with 5) and the secondary side pressure gauge (6).

Looking at the setting when using as a wet valve, water (pressurized water) is supplied to the secondary side pipe by opening the primary side valve. Close the primary valve and open the fluid outlet 14 to discharge the water in the valve and close it, then inject a small amount of air through the air inlet to adjust the pressure, and then open the primary valve.

As an example, the primary side fire extinguishing water pressure in the present invention in which the diameter of the buoyancy sphere 60 is 100mm based on the sprinkler minimum radiation pressure of 0.1MPA is 78.5kg. At this time, when the cross-sectional area ratio between the piston 40 and the minute gap is 100:1, the pressure applied to the upper surface of the buoyancy sphere 60 is 785 g. Therefore, by adding the effect of 60% of the elastic force of the return spring 50 and 40% of the buoyancy force of the buoyancy ball 60, if the force acting upward on the buoyancy ball 60 is 785 g or more, the piston 40 is the inlet ( 22) is blocked.

When the present invention is used as a wet valve, it is preferable to install it vertically at a position higher than the pipe of the sprinkler.

1: Fixed O-ring 2: Removable upper O-ring
3: Removable lower O-ring 4: O-ring
5: Primary pressure gauge 6: Secondary pressure gauge
10: body 11: inlet
12: spillway 13: warning device
14: fluid outlet 14: air outlet
20: guide cap 21: euro
22: inflow path 23: outflow path
24: bump 25: jam prevention groove
30: partition plate 31: adjustment hole
32: sensor
40: piston 41: piston rod
42: connection protrusion
50: return spring
60: buoyancy ball
70: pressure reducing spring
80: piston shaft
90: spring support plate 91: support ring
92: support rod

Claims (9)

The body 10 having an inlet 11 connected to the primary side pipe to which the fire extinguishing water is supplied is formed at the upper end, and an outlet 12 to the lower end connected to the secondary side pipe filled with compressed air or pressurized water;
It forms a cylindrical shape open in the vertical direction and is provided inside the body 10 spaced apart from the side wall of the body 10 to form a flow path 21 between the side wall of the body 10 and the flow path at the top a guide cap 20 through which an inflow passage 22 communicating with the 21 is formed through, and an outlet passage 23 communicating with the flow passage 21 at a lower portion thereof;
a partition plate 30 in the form of a plate and fixed in the center in the longitudinal direction of the guide cap 20 to partition the upper and lower spaces and having an adjustment hole 31 in the center;
A piston 40 that forms a cylindrical shape open in the vertical direction and is provided on the upper side of the partition plate 30 to block the inflow passage 22 while sealing the upper portion of the guide cap 20;
a return spring 50 provided on the upper side of the partition plate 30 to apply an elastic force to the piston 40;
While having buoyancy, it has a cylindrical shape having a diameter corresponding to the inner diameter of the guide cap 20, is provided above the outlet passage 23 from the lower side of the partition plate 30, and is provided at the lower side of the pressure reducing spring 70 Buoyancy sphere (60) that is affected by the elastic force acting upward by the and the pressure of the secondary side pipe;
A piston shaft 80 provided to pass through the adjustment hole 31 and connecting the piston 40 and the buoyancy sphere 60;
A fine gap is formed between the adjustment hole 31 and the piston shaft 70,
In the state where the piston 40 blocks the inflow path 22 by the buoyancy force of the buoyancy tool 60 and the elastic force of the return spring 50 and the pressure reducing spring 70, when a fire occurs, the sprinkler opens 2 As the pressure of the secondary side pipe decreases, the fire water supplied through the primary side pipe moves through the minute gap and pressurizes the buoyancy sphere 60. When the buoyancy sphere 60 moves downward, the piston 40 moves together. As the inflow passage 22 is opened, fire water is supplied to the secondary side pipe passing through the inflow passage 22, the flow passage 21, and the outflow passage 23, and is ejected through the sprinkler, and at the same time to the buoyancy port 60 A dry-wet valve with a pressure reduction function, characterized in that the pressure reduction function is achieved by applying pressure. According to claim 1,
Further comprising a spring support member 90 provided above the outlet passage 23 from the lower side of the buoyancy sphere 60 to support the pressure reducing spring 70 placed on the upper side,
The spring support 90 includes a support ring 91 having a ring shape having a diameter corresponding to the inner diameter of the guide cap 20, and a plurality of support rods radially formed from the center of the support ring 91 ( 92), characterized in that it includes a dry-wet valve with a pressure reducing function. 3. The method of claim 2,
The spring support (90) can be fixed after changing the position in the vertical direction, so that the elastic force can be adjusted. 4. The method of claim 3,
The guide cap 20 has a screw thread formed on the inner peripheral surface from the lower end to a predetermined point on the upper side of the outlet passage 23,
On the outer peripheral surface of the support ring 91, a thread corresponding to the thread formed on the inner peripheral surface of the guide cap 20 is formed, and the elastic force can be adjusted by rotating the support ring 91 having a decompression function. Dry-wet valve. According to claim 1,
The body 10 is provided with a warning device 13 for sounding a warning broadcast and an emergency bell on the outside,
The partition plate 30 is provided with a sensor 32 for detecting the separation from the buoyancy sphere 60,
When it is sensed by the sensor (32) that the buoyancy ball (60) is separated from the partition plate (30), the warning device (13) is activated. According to claim 1,
The guide cap (20) is formed in a ring shape and provided with a bump (24) and a fixed O-ring (1) along the inner periphery to seal the inflow path. 7. The method of claim 6,
The piston 10 is formed to have a thickness of the outer wall thicker than the length at which the bump 24 protrudes,
The bump (24) forms a shape in which a portion located on the inner side of the lower end is slanted upward,
An upper end of the outer wall of the piston (40) is formed to correspond to the shape of the lower end of the bump (24). According to claim 1,
A fluid outlet 14 that can be opened and closed at a lower point adjacent to the inlet 22 and an air outlet 15 that can be opened and closed at a central point in the longitudinal direction are formed through the side wall of the body 10 A dry-wet valve with a pressure-reducing function. According to claim 1,
In the upper portion of the guide cap (20), an inner peripheral surface adjacent to the inflow passage (22) is recessed inward to form a jam-preventing groove (25).

Images