Deluge valve

Abstract

To provide a deluge valve capable of appropriately exhausting air in any use state of vertical use and horizontal use by preventing mounting error of piping for exhaustion / drainage in a piston chamber in a plant, a construction site, etc.SOLUTION: A deluge valve 1 comprises: a primary chamber 5; a secondary chamber 9; a valve body 11 partitioning the primary chamber 5 and the secondary chamber 9; a piston 17 actuating the valve body 11; and a piston chamber 15 in which the piston 17 is disposed. An air exhaustion mechanism including one exhaust port 29 from which air at a pressurization side of the piston chamber 15 is exhausted is provided, and the air exhaustion mechanism is capable of exhausting the air from the exhaust port 29 in any use state of a vertical use time in which the mechanism is used while being disposed between primary piping 3 and secondary piping 7 disposed in a vertical direction, and a horizontal use time in which the mechanism is used while being disposed between the primary piping 3 and the secondary piping 7 disposed in a horizontal direction.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a pressure-release type simultaneous opening valve installed in a pipe for supplying fire extinguishing water in fire-fighting equipment.

Background Art

[0002] As a simultaneous opening valve used in fire-fighting equipment, there is a pressure-release type in which when pressure is applied to a piston provided at the tip of a piston stem protruding from a valve body, the valve body opens and the primary chamber and the secondary chamber communicate with each other. An example of such a pressure-release type simultaneous opening valve is disclosed in Patent Document 1.

[0003] As shown in FIG. 1 of Patent Document 1, the "pressure-release valve" of Patent Document 1 pressurizes the lower chamber 4 by allowing the high-pressure fire extinguishing water in the primary side flow path 1a to flow into the lower chamber 4 from the primary pressure inlet hole 6, and pushes up the piston 3 upward by this pressure to open the main valve 12. At the time of this pressurization (during the opening operation), if all the air in the pressurized side (lower chamber 4) of the piston chamber is not discharged, a predetermined pressure cannot be obtained due to the action of the expansion and contraction of the air, and the valve body may not open correctly. In this regard, Patent Document 1 discharges air from the small hole B provided in the piston 3 to the upper chamber 5 side. The discharge port for discharging the air on the pressurized side of the piston chamber such as the small hole B needs to be arranged at the highest position on the pressurized side of the piston chamber.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] FIG. 1 of Patent Document 1 described above shows a state of being disposed and used between pipes arranged horizontally (hereinafter referred to as "horizontal use"), but the arrangement of the pipes is not limited to this depending on the installation site. For example, when disposed and used between pipes arranged vertically (hereinafter referred to as "vertical use"), it is necessary to install it in a state rotated 90 degrees from the state of FIG. 1 of Patent Document 1. In that case, since the small hole B does not reach the highest position in the lower chamber 4, there is a risk that all the air in the lower chamber 4 cannot be discharged during pressurization and the operation becomes unstable.

[0006] The present invention has been made to solve such problems, and an object thereof is to provide a simultaneous opening valve capable of discharging all the air on the pressurized side of the piston chamber in any use state, whether vertical use or horizontal use.

Means for Solving the Problems

[0007] (1) The simultaneous opening valve according to the present invention includes a primary chamber, a secondary chamber, a valve body partitioning the primary chamber and the secondary chamber, a piston for operating the valve body, and a piston chamber in which the piston is disposed, and is provided with an air discharge mechanism having one discharge port for discharging the air on the pressurized side of the piston chamber. The air discharge mechanism is configured to be able to discharge the air from the discharge port in any use state, whether vertical use when disposed between a primary side pipe and a secondary side pipe arranged vertically or horizontal use when disposed between a primary side pipe and a secondary side pipe arranged horizontally.

[0008] (2) Further, the simultaneous opening valve according to the present invention includes a primary chamber, a secondary chamber, a valve body that partitions the primary chamber and the secondary chamber, and a valve operating mechanism that operates the valve body. The valve operating mechanism includes a piston chamber into which water on the primary side is introduced, a piston movably provided in the piston chamber, a stem that interlocks the piston and the valve body, and a lid member that has a dome-shaped portion with the surface on the piston chamber side convex and covers the pressurized side in the piston chamber. The lid member has a discharge port formed on the outer peripheral portion of the dome-shaped portion for discharging air and water on the pressurized side of the piston chamber, and a groove-shaped portion that connects the discharge port and the central portion of the inner surface in the dome-shaped portion. When used vertically, disposed between the vertically arranged primary side pipe and secondary side pipe, the discharge port is arranged at the highest position in the dome-shaped portion. When used horizontally, disposed between the horizontally arranged primary side pipe and secondary side pipe, the bottom of the groove-shaped portion is arranged at the same height as or higher than the central portion of the dome-shaped portion. In any of the vertical use state and the horizontal use state, the air is configured to be discharged from the discharge port.

[0009] (3) Further, in the invention according to (1) or (2) above, an orifice is provided in the piston to communicate the pressurized side and the other side in the piston chamber.

Effect of the Invention

[0010] In the present invention, an air discharge mechanism having a single discharge port for discharging air on the pressurized side of the piston chamber is provided. The air discharge mechanism can discharge the air in the piston chamber from a single discharge port in any of the vertical use state and the horizontal use state, so that a stable operation can be realized regardless of the use state.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

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Figure 8

Figure 9

Figure 10

Embodiments for Carrying Out the Invention

[0012] Prior to describing an embodiment according to the present invention, the inventor will explain the process leading to the present invention. In order to solve the above-described problems, a simultaneous opening valve 33 as shown in Figs. 8 and 9 is assumed, for example, so that the air on the pressurized side of the piston chamber can be appropriately discharged in both the vertical use and horizontal use states.

[0013] The simultaneous opening valve 33 includes a primary chamber 5 communicating with the primary side pipe 3, a secondary chamber 9 communicating with the secondary side pipe 7, a valve body 11 partitioning the primary chamber 5 and the secondary chamber 9, and a valve operating mechanism 13 for operating the valve body 11. 5a and 9a are drain ports for draining the primary side and the secondary side of the valve body 11 during normal times, but the description thereof is omitted in this embodiment.

[0014] The valve operating mechanism 13 includes a piston chamber 15 into which water on the primary side of the valve body 11 is introduced, a piston 17 movably provided in the piston chamber 15, a stem 19 for interlocking the piston 17 and the valve body 11, and a lid member 35 covering the pressurized side in the piston chamber 15.

[0015] The lid member 35 has a dome-shaped portion 23 with the surface on the piston chamber 15 side being convex outward. An inlet port 25 for introducing water on the primary side of the valve body 11 into the piston chamber 15 is provided on the outer peripheral portion of the dome-shaped portion 23. The inlet port 25 is connected to the water supply port 5b of the primary chamber 5 via a pipe 27. Further, a first discharge port 37 and a second discharge port 39 for discharging air and water in the piston chamber 15 are formed on the outer peripheral portion and the central portion of the dome-shaped portion 23. The first discharge port 37 and the second discharge port 39 are selectively used depending on the usage state of the simultaneous opening valve 33. Hereinafter, this point will be specifically described.

[0016] FIG. 8 shows a vertical usage state in which the simultaneous opening valve 33 is disposed and used between the vertically arranged primary side pipe 3 and secondary side pipe 7. As shown in FIG. 8, when the simultaneous opening valve 33 is used vertically, exhaust and drainage are performed from the first discharge port 37 disposed at the highest position of the piston chamber 15. At this time, the second discharge port 39 is closed.

[0017] Also, when the quick-opening valve 33 is arranged and used between the primary-side pipe 3 and the secondary-side pipe 7 arranged horizontally, during horizontal use, as shown in Fig. 9, exhaust and drainage are carried out from the second discharge port 39. This is because the second discharge port 39 provided at the center of the dome-shaped portion 23 is arranged at the highest position of the piston chamber 15, so all the air in the piston chamber 15 can be discharged.

[0018] On the other hand, since the first discharge port 37 is provided at the outer peripheral portion of the dome-shaped portion 23, in the state during horizontal use, the opening of the first discharge port 37 (the portion indicated by the broken-line circle X in Fig. 9) will be located below the second discharge port 39, and all the air on the pressurized side of the piston chamber 15 cannot be discharged. Therefore, the first discharge port 37 is blocked during horizontal use.

[0019] As described above, for the quick-opening valve 33 shown in Figs. 8 and 9, during vertical use, the first discharge port 37 is arranged at the highest position of the piston chamber 15, and during horizontal use, the second discharge port 39 is arranged at the highest position of the piston chamber 15. Therefore, by selectively using the first discharge port 37 and the second discharge port 39 according to the use state, air can be appropriately discharged in either the vertical use state or the horizontal use state.

[0020] As described above, the quick-opening valve 33 is used by attaching the pipe 31 for exhaust and drainage to one of the first discharge port 37 and the second discharge port 39 and blocking the other according to the use state at the site. However, the attachment and blocking of the pipe 31 to the first discharge port 37 and the second discharge port 39 may be carried out in advance at a factory or the like. In that case, product management and process management corresponding to the site are required, and there is also a risk of piping errors such as attaching the pipe to a discharge port other than the one to which the pipe should originally be attached. Also, when attaching the pipe 31 at the site, there was a risk that the on-site operator might mistake the discharge port to be used. Furthermore, when the shapes of the first discharge port 37 and the second discharge port 39 are different, it is also necessary to prepare pipes 31 corresponding to their respective shapes, and product management is complicated. Therefore, in order to solve the above problems, the inventor has intensively studied a method that can discharge the air on the pressurized side of the piston chamber in any usage state, whether vertical or horizontal, through a single discharge port, and thus arrived at the present invention.

[0021] FIG. 1 is a cross-sectional view of the simultaneous opening valve 1 according to an embodiment of the present invention, showing the cross-section taken along line B-B in FIG. 2(b). In FIG. 1, the same parts as in FIGS. 8 and 9 are denoted by the same reference numerals. FIG. 2 shows the external appearance of the simultaneous opening valve 1. FIG. 2(a) is a perspective view, and FIG. 2(b) is a view taken along the arrow A-A in FIG. 2(a). As shown in FIGS. 1 and 2, the simultaneous opening valve 1 according to the present embodiment includes a primary chamber 5 communicating with the primary side pipe 3, a secondary chamber 9 communicating with the secondary side pipe 7, a valve body 11 partitioning the primary chamber 5 and the secondary chamber 9, and a valve operating mechanism 13 for operating the valve body 11. Drain ports 5a and 9a for draining the primary side and the secondary side of the valve body 11 are provided in the primary chamber 5 and the secondary chamber 9. The pipes connected to the drain ports 5a and 9a are not shown.

[0022] The valve operating mechanism 13 includes a piston chamber 15 into which the water on the primary side is introduced, a piston 17 movably provided in the piston chamber 15, a stem 19 for interlocking the piston 17 and the valve body 11, and a lid member 21 covering the pressurized side in the piston chamber 15. Hereinafter, the lid member 21, which is a characteristic part of the present embodiment, will be described in detail with reference to FIGS. 3 and 4.

[0023] FIG. 3 shows the lid member 21 alone. FIG. 3(a) is a perspective view seen from the outside, and FIG. 3(b) is a perspective view seen from the inside. FIG. 4(a) shows the lid member 21 alone in FIG. 2(b), and FIG. 4(b) is a view showing the back side (inside) of the lid member 21 shown in FIG. 4(a).

[0024] As shown in Fig. 3(b), the lid member 21 has a dome-shaped portion 23 with a surface on the piston chamber 15 side being convex outward. The reason for shaping a part of the lid member 21 into a dome shape is to increase the strength compared to a flat disc shape. If the dome-shaped portion 23 is shaped to be convex inward, the center of the dome-shaped portion 23 is likely to interfere with the piston 17, or water is likely to accumulate on the outer surface of the dome-shaped portion 23 during horizontal use, leading to easy corrosion. Therefore, the dome-shaped portion 23 preferably has a shape that is convex outward.

[0025] The lid member 21 is provided with a flange portion 24, and bolt holes 24a for inserting bolts for attaching to the simultaneous opening valve 1 are formed in the flange portion 24.

[0026] Also, as shown in Figs. 3 and 4, an inlet 25 for introducing the water on the primary side of the valve body 11 into the piston chamber 15 is provided on the outer peripheral portion of the dome-shaped portion 23, and it is connected to the water supply port 5b of the primary chamber 5 which is the primary side of the valve body 11 via a pipe 27 (see Fig. 1). A pressure regulating valve (not shown) may be provided in the pipe 27.

[0027] Furthermore, one discharge port 29 for discharging the pressurized air and water (fire extinguishing water) in the piston chamber 15 is provided on the outer peripheral portion of the dome-shaped portion 23 in the lid member 21, and the discharge port 29 is connected to the inlet 9b of the secondary chamber 9 via a pipe 31. It should be noted that the above is configured to discharge the pressurized air and water in the piston chamber 15 to the secondary chamber 9, but the discharge destination is not limited to this and may be for discharging to the atmosphere or draining water.

[0028] Also, a groove-shaped portion 23b connecting the central portion 23a of the inner surface of the dome-shaped portion 23 and the discharge port 29 is formed on the inner surface of the dome-shaped portion 23 (see Figs. 3(b) and 4(b)). The discharge port 29 and the groove-shaped portion 23b in the present embodiment correspond to one of the components of the air discharge mechanism of the present invention. Hereinafter, the groove-shaped portion 23b will be described in detail with reference to Fig. 1.

[0029] FIG. 1 shows a state in horizontal use where the simultaneous opening valve 1 is disposed between the primary side pipe 3 and the secondary side pipe 7 arranged horizontally, and is a cross-section taken along line B-B in FIG. 2(b), i.e., a cross-section passing through the bottom of the groove-shaped portion 23b. As shown in the enlarged view of FIG. 1, the groove-shaped portion 23b is formed such that, in horizontal use, the bottom of the groove-shaped portion 23b is arranged at the same height as the central portion 23a of the dome-shaped portion 23 or at a position higher than the central portion 23a.

[0030] In the simultaneous opening valve 33 of FIG. 9 described above, when the liquid level of the fire extinguishing water introduced into the piston chamber 15 reaches the portion shown by the broken-line circle X in FIG. 9, the space inside the dome-shaped portion 23 and the first discharge port 37 is partitioned, and the air remaining inside the dome-shaped portion 23 cannot be discharged from the first discharge port 37. However, in the simultaneous opening valve 1 of the present embodiment, due to the formation of the groove-shaped portion 23b, such partitioning does not occur, and air can be appropriately discharged from the discharge port 29 until the pressurized side of the piston chamber 15 is filled with fire extinguishing water.

[0031] Since no air remains in the piston chamber 15 as described above, the simultaneous opening valve 1 shown in FIG. 1 can obtain a predetermined pressure during pressurization in horizontal use, and the valve operating mechanism 13 operates reliably and the valve body 11 opens (see FIG. 5).

[0032] Note that a convex-shaped portion 23c is formed in the corresponding portion outside the lid member 23 at the portion where the groove-shaped portion 23b is formed (see FIGS. 3(a) and 4(a)). As can be seen from the cross-section of FIG. 1, the portion where the groove-shaped portion 23b is formed also ensures the same thickness as other portions, and the strength of the lid member 23 is similar to that of the conventional lid member 35.

[0033] Next, the case where the simultaneous opening valve 1 of the present embodiment described above is used vertically will be described. FIG. 6 is a cross-sectional view of the simultaneous opening valve 1 in a state of vertical use disposed between the primary side pipe 3 and the secondary side pipe 7 arranged vertically. As shown in FIG. 6, in vertical use, the discharge port 29 is arranged at the highest position in the dome-shaped portion 23. Thus, when fire extinguishing water is introduced from the inlet 25, the air on the pressurized side of the piston chamber 15 can be appropriately discharged from the discharge port 29 before the liquid level of the fire extinguishing water reaches the discharge port 29. Therefore, a predetermined pressure can be obtained during pressurization, and the valve operating mechanism 13 operates reliably to open the valve body 11, similar to the horizontal use shown in FIG. 1.

[0034] As described above, in the present embodiment, an air discharge mechanism is provided, which is composed of the discharge port 29 provided on the outer peripheral portion of the dome-shaped portion 23 of the lid member 21 and the groove-shaped portion 23b connecting the discharge port 29 and the central portion 23a of the inner surface in the dome-shaped portion 23. Therefore, the air on the pressurized side of the piston chamber 15 can be appropriately discharged in any usage state, whether it is vertical use or horizontal use.

[0035] In addition, since there is only one discharge port 29 for discharging the air on the pressurized side of the piston chamber 15, there is no possibility of misconnection of the piping 31 in the factory or at the site, and product management, process management, and on-site construction become easy.

[0036] It should be noted that the present invention is not limited to the above configuration, and various aspects within the scope described in the claims are also included in the present invention. For example, in the above embodiment, the water on the primary side of the valve body 11 is introduced into the piston chamber 15 from the water supply port 5b provided in the primary chamber 5, but the water supply port 5b may be provided in the primary side piping 3.

[0037] In addition, the above embodiment is an example using the lid member 21 in which the discharge port 29 is formed in the outer peripheral portion of the dome-shaped portion 23, but as another aspect of the lid member, a lid member 32 as shown in FIG. 7 may be used. The lid member 32 shown in FIG. 7 has the discharge port 29 provided on the side surface of the flange portion 24, and a through hole 24b is formed in the flange portion 24 so as to connect the discharge port 29 and the piston chamber 15. The lid member 32 has a groove-shaped portion 23b that connects the through-hole 24b and the central portion 23a of the dome-shaped portion 23. As shown in Fig. 7(a), the groove-shaped portion 23b is formed such that the bottom of the groove of the groove-shaped portion 23b is arranged at the same height as the central portion 23a or at a higher position than the central portion 23a during horizontal use. Also, as shown in Fig. 7(b), the lid member 32 has the discharge port 29 arranged at the highest position during vertical use.

[0038] Even when the lid member 32 configured as described above is used, similar to the case of using the lid member 21 in which the discharge port 29 is formed in the outer peripheral portion of the dome-shaped portion 23, the air on the pressurized side of the piston can be appropriately discharged from the discharge port 29 in both the horizontal use state and the vertical use state. However, the portion forming the through-hole 24b may be provided with a convex portion in the corresponding portion outside the flange portion 24 so as not to be thin-walled to ensure strength.

[0039] In addition, the simultaneous opening valve 1 of the present embodiment can appropriately discharge the air in the piston chamber in any of the horizontal use state and the vertical use state as described above. However, in order to obtain this effect, it is necessary to use it in the correct installation state as shown in Figs. 1 and 6. However, in the case of horizontal use, it may be difficult to install as shown in Fig. 1 due to reasons such as ensuring the installation space and maintainability.

[0040] For example, in the simultaneous opening valve 1 of Fig. 1, since the lower end of the stem 19 protrudes from the lower part of the simultaneous opening valve 1 during the opening operation (see Fig. 5), it is necessary to secure a space for the stem 19 to operate below the simultaneous opening valve 1. Furthermore, when performing maintenance (such as removing clogging) on the valve body 11 and its nearby components, the lid member at the lower part of the main body is removed for the operation. Therefore, it is also necessary to secure a space required for such an operation below the simultaneous opening valve 1. However, when the connecting pipe is close to the ground, it is difficult to secure the above space.

[0041] In addition, although the valve body 11 side has a higher disassembly frequency due to maintenance compared to the piston chamber 15 side, during maintenance, it is necessary for the operator to disassemble and assemble the valve body 11 while looking up at the inside of the simultaneous opening valve 1 from below, so the workability is not good. In particular, if the size of the simultaneous opening valve 1 is large, the valve body 11 is also heavy, making the work from below even more difficult.

[0042] For the reasons described above, there is a desire to arrange the valve body 11 on the upper side and the piston chamber 15 on the lower side when used horizontally. Therefore, FIG. 10 shows another embodiment of the simultaneous opening valve 1 that can meet such a desire. Note that FIG. 10 shows the manual start valve 41 that is omitted in FIGS. 1 and the like. The manual start valve 41 is for an operator who has visually confirmed a fire to manually start the simultaneous opening valve. By opening the manual start valve 41, the water in the primary chamber 5 is introduced from the inlet 25 into the piston chamber 15. Although not shown, it is common to provide an electric valve in parallel with the manual start valve 41. The electric valve is opened remotely by a receiving panel that has received a fire signal from a fire detector or the like. The simultaneous opening valve is opened either by manually opening the manual start valve 41 or remotely opening the electric valve.

[0043] The simultaneous opening valve 43 shown in FIG. 10 is provided with an orifice 45 that communicates the pressurized side and the other side in the piston chamber 15 with the piston 17 in addition to the configuration of the simultaneous opening valve 1 described above. By providing the orifice 45, the simultaneous opening valve 43 can discharge all the air on the pressurized side in the piston chamber 15 to the other side through the orifice 45 even when the valve body 11 is arranged on the upper side and the piston chamber 15 is arranged on the lower side and used horizontally as shown in FIG. 10. In addition, the simultaneous opening valve 43 can appropriately discharge the air on the pressurized side of the piston chamber 15 from the discharge port 29 of the lid member 21 in the same manner as the simultaneous opening valve 1 even in the horizontal use state where the piston chamber 15 is arranged on the upper side and the valve body 11 is arranged on the lower side as shown in FIG. 1 or in the vertical use state as shown in FIG. 6. Therefore, it is an example that can cope with more diverse use states.

Explanation of Signs

[0044] 1 One-way open valve 3 Primary side piping 5 Primary chamber 5a Drain outlet 5b Water supply port 7 Secondary side piping 9 Secondary chamber 9a Drain outlet 9b Inlet 11 Valve body 13 Valve operating mechanism 15 Piston chamber 17 Piston 19 Stem 21 Cover member 23 Dome-shaped part 23a Central part 23b Groove-shaped part 23c Convex-shaped part 24 Flange part 24a Bolt hole 24b Through hole 25 Inlet 27 Pipe 29 Outlet 31 Pipe 32 Cover member (other aspect) 33 One-way open valve (assumed example) 35 Cover member (assumed example) 37 First outlet 39 Second outlet 41 Manual start valve 43 One-way open valve (other aspect) 45 Orifice

Claims

1. An all - open valve comprising a primary chamber, a secondary chamber, a valve body separating the primary chamber and the secondary chamber, a piston for operating the valve body, and a piston chamber in which the piston is disposed, comprising an air discharge mechanism having one discharge port for discharging air on the pressurized side of the piston chamber, wherein the air discharge mechanism is arranged between a primary - side pipe and a secondary - side pipe arranged vertically and used in the vertical use state, and between a primary - side pipe and a secondary - side pipe arranged horizontally and used in the horizontal use state, and the discharge port is arranged at the highest position on the pressurized side of the piston chamber so that the air can be discharged in any use state. The all - open valve is characterized by this.

2. An all - open valve comprising a primary chamber, a secondary chamber, a valve body separating the primary chamber and the secondary chamber, and a valve operating mechanism for operating the valve body. The valve operating mechanism comprises a piston chamber into which primary - side water is introduced, a piston movably provided in the piston chamber, a stem for interlocking the piston and the valve body, and a lid member having a dome - shaped portion with an outer - convex surface on the piston - chamber side and covering the pressurized side in the piston chamber. The all - open valve is characterized by this. The lid member has a discharge port formed on the outer peripheral portion of the dome - shaped portion for discharging air and water on the pressurized side of the piston chamber, and a groove - shaped portion connecting the discharge port and the central portion of the inner surface of the dome - shaped portion. In the vertical use state where it is arranged between a primary - side pipe and a secondary - side pipe arranged vertically and used, the discharge port is arranged at the highest position in the dome - shaped portion. In the horizontal use state where it is arranged between a primary - side pipe and a secondary - side pipe arranged horizontally and used, the bottom of the groove - shaped portion is arranged at the same height as or higher than the central portion of the dome - shaped portion. The all - open valve is characterized in that it is configured to be able to discharge the air from the discharge port in any of the vertical use state and the horizontal use state.

3. The all - open valve according to claim 1 or 2, characterized in that an orifice for communicating the pressurized side and the other side in the piston chamber is provided in the piston.

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