JP2021105443A - Deluge valve for fire protection system, open type sprinkler system, and pre-action type flow water detection device - Google Patents

Abstract

To provide a deluge valve for a fire protection system which enables significant reduction of a pressure loss of a fire extinguishing agent.SOLUTION: A cylindrical packing 310 is a cylindrical body formed of an elastically deformable material, has an inner shape corresponding to outer shapes of frame-like valve bodies (240a, 240b, 250, 270, 280), and can house the frame-like valve bodies therein. When a water pressure in a packing chamber 300 is higher than a water pressure in a primary side inflow chamber 200a, the cylindrical packing 310 takes a first mode, in which the cylindrical packing 310 adheres to the frame-like valve bodies, to close an extinguishing agent passage 260 with the frame-like valve bodies. When the water pressure in the packing chamber 300 is lower than a water pressure in the primary side inflow chamber 200a, the cylindrical packing 310 takes a second mode, in which the cylindrical packing 310 separates from the frame-like valve bodies, to open the extinguishing agent passage 260.SELECTED DRAWING: Figure 4

Description

The present invention is a simultaneous release valve for firefighting equipment in which the flow path of the fire extinguishing agent in the valve chamber is closed or opened by increasing or decreasing the water pressure in the valve chamber, and an open sprinkler using this simultaneous release valve for firefighting equipment. Regarding equipment and pre-actuated water flow detection device.

Generally, fire sprinkler equipment sprays a fire extinguishing agent such as water at high pressure when a fire breaks out, and is classified into a closed type and an open type.

Closed sprinkler equipment includes wet, dry, and pre-actuated types, and a closed sprinkler head with a fire extinguishing agent outlet closed in normal times is used. On the other hand, in the open type sprinkler system, an open type sprinkler head in which the outlet of the fire extinguishing agent is opened in normal times and a simultaneous release valve are used. In the open sprinkler system, the fire extinguishing agent is sprayed all at once from a large number of open sprinkler heads installed in the protected area by opening the simultaneous release valves in the event of a fire. Such an open sprinkler system is effective in initially suppressing a fire.

The simultaneous release valve is closed in normal times, and is opened and operated in the event of a fire or inspection of firefighting equipment. In normal times, the piping as the primary side flow path of the simultaneous release valve is connected to a water tank installed in the building where there is no risk of freezing. The inside of the pipe as the primary side flow path is filled with a pressurized fire extinguishing agent. On the other hand, the piping as the secondary side flow path of the simultaneous release valve may be installed on the outer wall of the building or the like and connected to the sprinkler head, so that there is a risk of freezing. Therefore, the piping as the secondary side flow path is a dry piping whose inside is filled with air.

The simultaneous release valve is closed or opened by increasing or decreasing the water pressure in the valve chamber where the valve is provided. The water pressure in the valve chamber that operates the valve is increased by the water pressure of the fire extinguishing agent supplied from the primary side flow path, and the closed state of the valve is maintained well.

When a fire is detected when a fire occurs, for example, the solenoid valve of the simultaneous release valve is opened, and the fire extinguishing agent in the valve chamber flows out. As a result, the water pressure that kept the valve closed is lost, and the simultaneous release valve is completely opened. Then, the high-pressure fire extinguishing agent that has flowed into the simultaneous release valve from the primary side flow path by the fire extinguishing pump is sprayed from a plurality of open sprinkler heads connected to the secondary side flow path.

As prior art for such simultaneous release valves for firefighting equipment, the Republic of Korea Patent Application Publication No. 10-2014-0024611 (publication date: March 3, 2014, hereinafter referred to as "Patent Documents" listed in the following [Patent Documents] There is a "opening and closing device for simultaneous release valves for fire extinguishing equipment" in 1)).

The opening / closing device for the simultaneous release valve for firefighting equipment disclosed in Patent Document 1 includes an inflow chamber into which a fire extinguishing agent flows in, an outflow chamber in which the fire extinguishing agent flows out through the inflow chamber, and an inflow chamber and an outflow chamber by hydraulic pressure. A diaphragm that opens and closes the flow path between the fire extinguisher, a diaphragm chamber provided with this diaphragm, a shutoff valve that is connected to the primary side of the inflow chamber and opens and closes the inflow of fire extinguishing agent, and from this shutoff valve to the diaphragm chamber. It is configured to include a connecting line to be connected and a first manual valve connected in the middle of the connecting line to open and close the inflow of fire extinguishing agent into the diaphragm chamber.

Republic of Korea Patent Application Publication No. 10-2014-0024611 Japanese Unexamined Patent Publication No. 10-299938 Jikkenhei 6-50667 Gazette

<Problem of pressure loss>
Patent Document 1 does not disclose the mechanical structure of the simultaneous release valve for firefighting equipment. Therefore, Japanese Patent Application Laid-Open No. 10-299938 (Patent Document 2) and Jitsukaihei 6-50667 (Patent Document 3) are exemplified.

As disclosed in Patent Documents 2 and 3, in the conventional simultaneous release valve for firefighting equipment, the primary side inflow port and the secondary side inflow port have a linear shape in which the central axes of each are common. On the other hand, the central axes of the valve and the valve seat were orthogonal to the central axes of the primary side inflow port and the secondary side outflow port.

Because of this configuration, in the conventional simultaneous opening valve for firefighting equipment, when the valve is opened, the fire extinguishing agent that has flowed in from the primary side inflow bypasses in the direction of the valve chamber. It flows out to the secondary side outlet. That is, the fire extinguishing agent must bypass the valve chamber rather than flowing linearly from the primary side inlet to the secondary side outlet. Such "bending of the flow path" causes a pressure loss of the fire extinguishing agent between the primary side inlet and the secondary side outlet. The pressure loss of the fire extinguishing agent generated by the simultaneous release valve reduces the amount of the fire extinguishing agent sprayed from the plurality of sprinklers per unit time.

<Problem with opening / closing mechanism>
As disclosed in Patent Documents 2 and 3, the conventional simultaneous release valve for firefighting equipment includes an opening / closing mechanism for operating a valve (diaphragm or piston valve). The opening / closing mechanism needs to seal the moving parts such as the shaft (stem or spindle) for opening / closing the valve, resulting in a complicated structure with a large number of parts.

<Water hammer problem>
When the valve opens and closes rapidly, the inertia of the fluid causes an impact and high water pressure in the flow path. Such a phenomenon is generally called a water hammer. To prevent such water hammer, simultaneous opening valve firefighting equipment of Patent Document 2, by providing the pressure holding valve 19 _1, and limits the rapid movement of the diaphragm. Further, in the simultaneous release valve for firefighting equipment of Patent Document 3, a safety valve 27 is provided in the piston valve 21 to eliminate an abnormally high pressure in the pipe.

However, the configuration disclosed in Patent Documents 2 and 3 is a complicated valve structure generally called a "parent-child valve structure", which is poor in maintainability, and it takes time and effort to maintain a simultaneous release valve for firefighting equipment. On the other hand, if a complicated "parent-child valve structure" is not adopted, the simultaneous release valve for firefighting equipment suddenly opens and closes in response to a change in pressure, and a water hammer is generated in the pipe. Therefore, it is desirable to prevent water hammer with a very simple configuration.

<Problems with piping connection method>
As disclosed in Patent Documents 2 and 3, the conventional simultaneous release valve for firefighting equipment is provided with a flange for connecting pipes integrally with the valve body. For this reason, the conventional simultaneous release valve for firefighting equipment can only be connected to a pipe provided with a flange. In the field of firefighting equipment, various joints other than the flange method are adopted. In particular, the one-touch joint by coupling the coupling and the groove is very convenient because it does not require bolts, nuts and tools for coupling. As described above, if the simultaneous release valve for firefighting equipment having the same configuration can be combined with the joints of various types including the flange type, the application will be greatly expanded.

The present invention has been made in view of the above problems, and is a simultaneous release valve for firefighting equipment that enables the following A) to D), an open sprinkler system using this simultaneous release valve for firefighting equipment, and a preliminary. It is an object of the present invention to provide an actuated water flow detection device.
A) Significantly reduce the pressure loss of the fire extinguishing agent B) Significantly reduce the opening / closing mechanism C) Reduce the water hammer D) Combine with various types of joints

(1) In order to achieve the above object, the simultaneous release valve for fire extinguishing equipment of the present invention is a fire extinguishing equipment in which the flow path of the fire extinguisher in the valve chamber is closed or opened by increasing or decreasing the water pressure in the valve chamber. A simultaneous release valve for use, including a valve body, a frame-shaped valve body, and a tubular packing. The valve body includes the valve chamber, the primary side inlet of the fire extinguishing agent, and the fire extinguishing agent. A secondary side outlet is provided, and the primary side inlet and the secondary side outlet are provided in the valve body so as to face each other, and the frame-shaped valve body and the frame-shaped valve body and the inside of the valve chamber are provided. The tubular packing is housed, and the frame-shaped valve body can support the block body that blocks the flow of the fire extinguishing agent and the block body in the middle of the flow path and allow the fire extinguishing agent to pass through. The tubular packing is a tubular body made of an elastically deformable material, has an internal shape corresponding to the outer shape of the frame-shaped valve body, and has the frame-shaped inside. It is possible to accommodate the valve body, and when the water pressure on the outside of the tubular packing in the valve chamber is equal to or higher than the water pressure on the inside, it becomes the first form of being in close contact with the frame-shaped valve body, and the frame-shaped A second form in which the flow path of the fire extinguishing agent is closed together with the valve body, and when the water pressure on the outside of the tubular packing in the valve chamber is lower than the water pressure on the inside, the fire extinguishing agent separates from the frame-shaped valve body. The flow path of the fire extinguishing agent is opened.

(2) Preferably, in the simultaneous release valve for firefighting equipment of the above (1), the primary side inlet, the secondary side outlet, the frame-shaped valve body, and the tubular packing have a central axis of each other. share it.

(3) Preferably, in the simultaneous opening valve for firefighting equipment according to (1) or (2), the frame-shaped valve body includes two frames having a substantially truncated cone shape, and each frame has a small diameter. The plurality of plate-shaped supporters are radially arranged at regular intervals between the first ring plate and the second ring plate having a large diameter, and the block bodies are two facing each other. It is supported between the first ring plates.

(4) Preferably, in the simultaneous release valve for firefighting equipment of the above (3), each of the first ring plate, the second ring plate, and the plurality of supporters constituting the frame is made of stainless steel plate.

(5) Preferably, in the simultaneous release valve for firefighting equipment of the above (4), grooves arranged radially are formed in each of the first and second ring plates, and both ends of each supporter are formed with grooves. A missing step portion and a protrusion portion protruding from the step portion are provided, and each supporter is welded to the first and second ring plates in a state where the protrusion portion is inserted into the groove portion.

(6) Preferably, in any one of the above (3) to (5), the simultaneous release valve for firefighting equipment is provided with a support plate interposed between the two first ring plates facing each other, and the two first rings are provided. By fixing the two block bodies from the back surface side of each of the plates to the front surface and the back surface of the support plate, the two frame bodies, the support plate, and the two block bodies are integrally assembled. It constitutes a frame-shaped valve body.

(7) Preferably, in the simultaneous release valve for firefighting equipment of the above (6), each of the two block bodies has a substantially conical shape, and the bottom surface of each block body is fixed to the front surface and the back surface of the support plate, respectively. NS.

(8) Preferably, in the simultaneous release valve for firefighting equipment according to (6) or (7), the peripheral edge portion of the support plate projects slightly outward from the peripheral edge portions of the two first ring plates, and the above. A recess having a shape corresponding to the peripheral edge of the support plate is provided in the center of the inner surface of the tubular packing, and when the tubular packing is in the first form, the recess is the peripheral edge of the support plate. Adhere to.

(9) Preferably, in any one of the above (1) to (8) for the simultaneous release valve for firefighting equipment, the primary side joint connected to the piping of the primary side flow path and the piping of the secondary side flow path The primary side joint is interchangeably connected to the primary side inflow port of the valve body, and the secondary side joint is the secondary side flow of the valve body. It is interchangeably connected to the outlet.

(10) Preferably, in the simultaneous release valve for firefighting equipment of the above (9), the fire extinguishing agent is supplied from the primary side joint to the valve chamber by being connected between the valve body and the primary side joint. A water supply pipe for draining the fire extinguishing agent in the valve chamber, which is connected to the valve body, is provided.

(11) In the simultaneous release valve for firefighting equipment according to (9) or (10), the primary side joint is another flange for connecting to one flange of the pipe of the primary side flow path, or the above. It has a groove for connecting to the coupling of the pipe of the primary side flow path.

(12) In any of the above-mentioned (9) to (11), the other flange for connecting the secondary side joint to one flange of the pipe of the secondary side flow path in the simultaneous release valve for firefighting equipment. Or, it has a groove for connecting to the coupling of the pipe of the secondary side flow path.

(13) In order to achieve the above object, the open sprinkler system of the present invention can be used from the simultaneous release valve for firefighting equipment according to any one of (1) to (12) above and the simultaneous release valve for firefighting equipment. It comprises a plurality of open sprinkler heads to which a fire extinguishing agent is supplied.

(14) In order to achieve the above object, the pre-actuated water flow detection device of the present invention includes the simultaneous release valve for firefighting equipment according to any one of (1) to (12) above and the simultaneous release valve for firefighting equipment. A detection means for detecting the flow of the fire extinguishing agent when the flow path is opened is provided.

Here, the term "fire extinguishing agent" as used herein refers to water, water containing an infiltrating agent, a foam fire extinguishing agent (including an aqueous solution), a strengthening liquid fire extinguishing agent, and other fire extinguishing agents that are liquid within the operating temperature range. include.

In the simultaneous release valve for firefighting equipment of the present invention, the tubular packing is deformed into the first or second form with respect to the frame-shaped valve body fixed in the valve body, and the flow path of the fire extinguishing agent is opened and closed. It has a new valve structure not found in conventional technology. Due to such a novel valve structure, the simultaneous release valve for firefighting equipment of the present invention, the open sprinkler equipment using this simultaneous release valve for firefighting equipment, and the pre-actuated water flow detection device are each described in A) to D) above. Is possible.

It is a perspective view which shows the simultaneous release valve for firefighting equipment which concerns on 1st Embodiment of this invention. It is a side view which shows the simultaneous release valve for the firefighting equipment. It is an exploded perspective view which shows the simultaneous release valve for firefighting equipment. It is sectional drawing which shows the closed state of the simultaneous release valve for firefighting equipment. It is sectional drawing which shows the open state of the simultaneous release valve for firefighting equipment. It is sectional drawing which shows the simultaneous release valve for firefighting equipment which concerns on 2nd Embodiment of this invention.

The embodiments of the present invention described below are examples for explaining the structure and function, and the scope of rights of the present invention should not be construed as being limited by the description and embodiments of the present specification.

That is, the embodiments can be modified in various ways and can be in various forms, so that the scope of rights of the present invention should be understood to include equality in which the technical idea can be realized. Is.

Also, the objects and effects of the present invention presented herein do not mean that all of them are included in a particular embodiment, nor that they must include only such effects. It should not be understood that such an interpretation limits the scope of rights of the present invention.

Hereinafter, the configuration and effect of a preferred embodiment capable of effectively reproducing the features of the present invention will be described in detail with reference to the drawings attached to the application.

<First Embodiment>
FIG. 1 is a perspective view showing a simultaneous release valve for firefighting equipment according to the first embodiment of the present invention. FIG. 2 is a side view of the simultaneous release valve for firefighting equipment of the present embodiment. FIG. 3 is an exploded perspective view of the simultaneous release valve for firefighting equipment of the present embodiment. 4 and 5 are cross-sectional views showing a closed state and an open state of the simultaneous release valve for firefighting equipment of the present embodiment.

The simultaneous release valve for firefighting equipment of the present embodiment shown in these drawings includes a valve body 100, a frame-shaped valve body (240a, 240b, 250, 270, 280), a tubular packing 310, a primary side joint 110a, and a secondary. It is characterized by being composed of a side joint 110b. The valve chamber of the valve body 100 is composed of a primary side inflow chamber 200a, a secondary side outflow chamber 200b, and a packing chamber 300, and the tubular packing 310 operates in the packing chamber 300. The primary side joint 110a and the secondary side joint 110b are connected to each pipe as a primary side flow path and a secondary side flow path (not shown).

Although not shown, the piping as the primary side flow path is connected to a pump for supplying a fire extinguishing agent to the simultaneous release valve for firefighting equipment. On the other hand, the piping as the secondary side flow path is connected to a large number of open sprinkler heads installed in the protected area.

As shown in FIG. 4, connection flanges 101 are provided at the upper and lower portions of the valve body 100. For example, the inner opening of the lower connecting flange 101 is the primary side inlet, the inner opening of the upper connecting flange 101 is the secondary side outlet, and the fire extinguishing agent flowing in from the primary side is the valve body. It is supplied to the secondary side through the inside of 100. The valve chamber in the valve body 100 is divided into a primary side inflow chamber 200a, a secondary side outflow chamber 200b, and a packing chamber 300 by a frame-shaped valve body.

As shown in FIG. 3, the frame-shaped valve body includes two frames having a substantially truncated cone shape, and each frame has a first ring plate 240a having a small diameter and a second ring plate 240b having a large diameter. A plurality of plate-shaped supporters 250 are arranged radially at regular intervals between them. A circular support plate 270 is interposed between the two first ring plates 240a facing each other. Bolt holes 271 are provided on the front surface and the back surface of the support plate 270, respectively. By fixing the two block bodies 280 to the bolt holes 271 of the support plate 270 from the back surface side of each of the two first ring plates 240a, the two frame bodies (240a, 240b, 250) and the support plate 270 are fixed. A frame-shaped valve body is constructed in which the two block bodies 280 are integrally assembled.

As shown in FIG. 4, in the valve body 100, the inside of the frame body located on the primary side of the frame-shaped valve body is the primary side inflow chamber 200a. The inside of the frame body located on the secondary side of the frame-shaped valve body is the secondary side outflow chamber 200b. Further, the outside of the two frames integrally assembled is a packing chamber 300 extending from the primary side to the secondary side in the valve body 100. Then, the plurality of supporters 250 constituting the two frames form a flow path 260 of the fire extinguishing agent from the primary side inflow chamber 200a to the secondary side outflow chamber 200b through the packing chamber 300.

Here, in the frame-shaped valve body of the present embodiment, each of the first ring plate 240a, the second ring plate 240b, and the plurality of supporters 250 constituting each frame body is made of stainless steel plate. It is possible to cast the entire frame-shaped valve body, but in the case of casting, the wall thickness of the plurality of supporters 250 must be increased in order to obtain sufficient strength. By making the frame-shaped valve body from the stainless steel plate as in the present embodiment, the wall thickness of the plurality of supporters 250 can be reduced, and the area of the flow path 260 can be expanded to the maximum.

In such a case, only the plurality of supporters 250 may be formed of stainless steel plates to expand the area of the passage 260, but as in the present embodiment, the first ring plate 240a, the second ring plate 240b, and the plurality of supporters 250 may be formed. If all of the supporters 250 of the above are made of stainless steel plates, welding between these parts becomes easy, and the durability of the frame-shaped valve body can be improved.

As shown in the enlarged view in FIG. 5, groove portions 241 arranged radially are formed in each of the first and second ring plates 240a and 240b. On the other hand, at both ends of each supporter 250, a missing step portion 251 and a protrusion 252 protruding from the step portion 251 are provided. Each supporter 250 is welded to the first and second ring plates 240a and 240b with the protrusion 252 inserted into the groove 241.

The stepped portion 251 of each supporter 250 is supported by one surface of the first and second ring plates 240a and 240b, and the protruding portion 252 of each supporter 250 is a groove portion of the first and second ring plates 240a and 240b. It is sandwiched between 241 parts, and the parts are welded to each other. As a result, the tightening force and durability between the parts can be improved.

As shown in FIG. 4, the support plate 270 is held between the holes of the two first ring plates 240a facing each other. As described above, bolt holes 271 are provided on the front surface and the back surface of the support plate 270, respectively, and two block bodies 280 are fixed to each bolt hole 271. Each block body 280 has a substantially conical shape, and its bottom surface is fixed to the front surface and the back surface of the support plate 270, respectively. The substantially conical surface of the block body 280 promotes a smooth flow of the fire extinguishing agent and reduces pressure loss. Such a block body 280 plays a role of closing each hole of the two first ring plates 240a and integrally connecting the two frames constituting the primary side inflow chamber 200a and the secondary side outflow chamber 200b. ..

The tubular packing 310 is a tubular body made of an elastically deformable material, has an inner shape corresponding to the outer shape of the frame-shaped valve body, and can accommodate the frame-shaped valve body inside. As shown in FIG. 4, when the water pressure of the packing chamber 300 is equal to or higher than the water pressure of the primary side inflow chamber 200a in the valve body 100, the tubular packing 310 becomes the first form in which the tubular packing 310 is in close contact with the frame-shaped valve body. Therefore, the flow path 260 of the fire extinguishing agent formed by the plurality of supporters 250 is closed. On the other hand, as shown in FIG. 5, when the water pressure in the packing chamber 300 is lower than the water pressure in the primary side inflow chamber 200a in the valve body 100, the tubular packing 310 separates from the frame-shaped valve body. In the form, the flow path 260 of the fire extinguishing agent formed by the plurality of supporters 250 is opened. Such a tubular packing 310 is formed of a natural or synthetic rubber material, and is preferably formed of, for example, ethylene propylene diene rubber (EPDM) having a hardness of 75 ± 5.

Since the water pressure in the packing chamber 300 is given from the primary side flow path, it is theoretically the same as the water pressure in the primary side inflow chamber 200a and does not exceed the water pressure in the primary side inflow chamber 200a. When the water pressure of the packing chamber 300 becomes the same as the water pressure of the primary side inflow chamber 200a, the tubular packing 310 becomes the first form in which the tubular packing 310 is in close contact with the frame-shaped valve body due to its own elasticity.

Here, as shown in the enlarged views in FIGS. 4, 5 and 6, the peripheral edge portion of the support plate 270 projects slightly outward from the peripheral edge portions of the two first ring plates 240a. On the other hand, in the center of the inner surface of the tubular packing 310, a recess 311 having a shape corresponding to the peripheral edge of the support plate 270 is provided. When the tubular packing 310 is in the first form, the recess 311 sandwiches the peripheral edge portion of the support plate 270 and comes into close contact with the peripheral edge portion. The close contact between the recess 311 and the peripheral edge of the support plate 270 satisfactorily blocks the flow of the fire extinguishing agent from the primary side inflow chamber 200a to the secondary side outflow chamber 200b when the tubular packing 310 is in the closed state.

As shown in FIG. 3, the primary side joint 110a and the secondary side joint 110b are flange type joints, and flanges 111 and 112 are provided at both ends, respectively. By bolting one flange 111 of the primary side joint 110a to the connection flange 101 on the primary side of the valve body 100, the primary side joint 110a becomes integral with the valve body 100. On the other hand, by fastening one flange 111 of the secondary side joint 110b to the secondary side connection flange 101 of the valve body 100 with a bolt, the secondary side joint 110b becomes integral with the valve body 100. In this way, by making the primary side joint 110a and the secondary side joint 110b separate parts from the valve body 100, various joints other than the flange type (for example, the coupling type joint shown in FIG. 6) can be used. It can be replaced.

A flange (not shown) provided in the pipe as the primary side flow path is fastened to the other flange 112 of the primary side joint 110a with bolts. A flange (not shown) provided in the pipe as the secondary side flow path is fastened to the flange 112 of the secondary side joint 110b with bolts.

As shown in FIG. 4, a water supply pipe 120 is connected between the valve body 100 and the primary side joint 110a. A manual first ball valve 121 is connected in the middle of the water supply pipe 120. The water supply pipe 120 connects the packing chamber 300 of the valve body 100 with the inside of the primary side joint 110a. When the first ball valve 121 is opened, the fire extinguishing agent that has flowed into the inside of the primary side joint 110a from the primary side flow path is supplied into the packing chamber 300 through the water supply pipe 120. As a result, the water pressure of the packing chamber 300 becomes equal to or higher than the water pressure of the primary side inflow chamber 200a, and the tubular packing 310 becomes the first form in which the tubular packing 310 is in close contact with the frame-shaped valve body, and the fire extinguishing is formed by the plurality of supporters 250. The flow path 260 of the agent is closed.

Further, a drain pipe 130 is connected to the valve body 100. An automatic solenoid valve 131 and a manual second ball valve 132 are connected in the middle of the drain pipe 130. The drain pipe 130 communicates the packing chamber 300 to the outside. When either the solenoid valve 131 or the second ball valve 132 is opened, the fire extinguishing agent filling the packing chamber 300 is drained to the outside. As a result, the water pressure in the packing chamber 300 becomes lower than the water pressure in the primary side inflow chamber 200a, and the tubular packing 310 becomes a second form separated from the frame-shaped valve body and is formed by the plurality of supporters 250. The flow path 260 of the fire extinguishing agent is opened.

As shown in FIGS. 1 and 2, a test pipe 140 is connected between the primary side joint 110a and the secondary side joint 110b. A pressure sensor 141, a pressure gauge 142, and a manual third ball valve 143 are connected in the middle of the test pipe 140. Further, a manual drain valve 150 is connected to the secondary side joint 110b. When the third ball valve 143 is opened during the inspection of firefighting equipment, the fire extinguishing agent that has flowed into the inside of the primary side joint 110a from the primary side flow path passes through the test pipe 140 and enters the inside of the secondary side joint 110b. Inflow directly. The fire extinguishing agent that has flowed into the inside of the secondary side joint 110b can be drained to the outside through the drain valve 150.

<Second Embodiment>
FIG. 6 is a cross-sectional view showing a simultaneous release valve for firefighting equipment according to the second embodiment of the present invention. As described above, the simultaneous release valve for firefighting equipment of the present embodiment has various joints other than the flange type by making the primary side joint 110a and the secondary side joint 110b separate parts from the valve body 100. Can be exchanged for.

In the simultaneous release valve for firefighting equipment shown in FIG. 6, the primary side joint 110a and the secondary side joint 110b are coupling type joints, respectively. That is, in FIG. 6, the primary side joint 110a is formed with a groove 113 for connecting to a coupling (not shown) provided in the piping of the primary side flow path. Similarly, the secondary side joint 110b is also formed with a groove 113 for connecting to a coupling (not shown) provided in the piping of the secondary side flow path.

Couplings (not shown) do not require bolts, nuts and tools, and can be connected to each groove 113 of the primary side joint 110a and the secondary side joint 110b with one touch, making the pipe connection work quicker and easier. It becomes possible to do.

<Effect>
The simultaneous release valve for firefighting equipment of the first and second embodiments described above has a tubular packing 310 with respect to a frame-shaped valve body (240a, 240b, 250, 270, 280) fixed in the valve body 100. It has a novel valve structure that is not found in the prior art, that is transformed into the first or second form to open and close the flow path of the fire extinguishing agent. Due to such a novel valve structure, the simultaneous release valve for firefighting equipment of each embodiment has the following effects.

<< Reduction of pressure loss >>
The simultaneous release valves for firefighting equipment of the first and second embodiments described above can significantly reduce the pressure loss of the fire extinguishing agent. That is, as shown in FIGS. 4 to 6, the simultaneous release valves for firefighting equipment of each embodiment are, in order from the primary side, the primary side inflow chamber 200a and the frame-shaped valve bodies (240a, 240b, 250, 270). 280), the central axes of the tubular packing 310 and the secondary outflow chamber 200b are aligned. This means that there is no "bending of the flow path" of the fire extinguishing agent in the valve body 100. Therefore, as shown by the arrow in FIG. 5, the fire extinguishing agent supplied to the valve body 100 flows substantially straight from the primary side inflow chamber 200a to the secondary side outflow chamber 200b. As a result, the pressure loss of the fire extinguishing agent between the primary side inlet and the secondary side outlet is significantly reduced. By reducing the pressure loss of the fire extinguishing agent, simultaneous watering is effectively performed from a large number of open sprinkler heads installed in the protected area, and the initial suppression of the fire becomes extremely good.

Further, the frame-shaped valve body forming the flow path 260 of the fire extinguishing agent is composed of a thin plate material such as a first ring plate 240a, a second ring plate 240b, and a plate-shaped supporter 250. With this configuration, the area of the fire extinguishing agent flow path 260 can be expanded to the maximum. As a result, the pressure loss of the fire extinguishing agent between the primary side inlet and the secondary side outlet is further reduced.

<< Reduction of opening and closing mechanism >>
The tubular packing 310 of a tubular body made of an elastically deformable material is deformed into the first form shown in FIG. 4 and the second form shown in FIG. 5, thereby opening and closing the flow path 260 of the fire extinguishing agent. There is. Therefore, no mechanical mechanism for opening and closing the tubular packing 310 is required, and there is no need to seal the moving parts, so that the number of parts can be significantly reduced and the structure can be greatly simplified. can.

<< Reduction of water hammer >>
In the conventional simultaneous release valve, the valve is suddenly opened and closed by an opening / closing mechanism, so that a water hammer is generated in the flow path. On the other hand, in the tubular packing 310 of each embodiment, the rubber tubular body contracts and expands according to the differential pressure between the packing chamber 300 and the primary side inflow chamber 200a, and the tubular packing 310 has the same as the first embodiment shown in FIG. It gradually transforms into the second form shown in FIG. As a result, the water hammer at the time of opening and the time of closing is greatly reduced. In particular, the simultaneous release valve for firefighting equipment of each embodiment has a structure because the tubular packing 310 does not suddenly deform even if the "parent-child valve structure" disclosed in Patent Documents 2 and 3 is not provided. Is greatly simplified, and maintenance of the simultaneous release valve for firefighting equipment becomes extremely easy.

<< Replacing the joint >>
The simultaneous release valve for firefighting equipment of each embodiment can be replaced with various joints including the flange method by making the primary side joint 110a and the secondary side joint 110b separate parts from the valve body 100. .. As a result, it is possible to combine a simultaneous release valve for firefighting equipment having the same configuration with joints of various types, and its application is greatly expanded.

<< Applications of simultaneous release valves for firefighting equipment >>
The simultaneous release valve for firefighting equipment of each embodiment can form an open type sprinkler equipment together with an open type sprinkler head in which the outlet of the fire extinguishing agent is opened in normal times. Specifically, a pipe for a secondary side flow path (not shown) is connected to a secondary side joint 110b of a simultaneous release valve for firefighting equipment, and a plurality of open sprinkler heads are connected to the pipe for the secondary side flow path. do. By opening the simultaneous release valve for firefighting equipment in the event of a fire, the fire extinguishing agent is supplied to a plurality of open sprinkler heads installed in the protected area all at once.

Further, the simultaneous release valve for firefighting equipment of each embodiment can be used as a pre-actuated water flow detection device by providing a flow water detection means. The detection means detects the flow of the fire extinguishing agent when the flow path of the simultaneous release valve for firefighting equipment is opened. An alarm is issued based on the detection result of the detection means.

100 Valve body 101 Connection flange 110a Primary side joint 110b Secondary side joint 111, 112 Flange
113 Groove 120 Water supply pipe 121 1st ball valve 131 Solenoid valve 132 2nd ball valve 140 Test piping 141 Pressure sensor 142 Pressure gauge 143 3rd ball valve 150 Drain valve 200a Primary side inflow chamber 200b Secondary side outflow chamber 240a 1st Ring plate 240b 2nd ring plate 241 Groove 250 Supporter 251 Step 252 Protrusion 260 Flow path 270 Support plate 271 Bolt hole 280 Block body 300 Packing chamber 310 Cylindrical packing 311 Recess

Claims (14)

A simultaneous release valve for firefighting equipment in which the flow path of the fire extinguishing agent in the valve chamber is closed or opened by increasing or decreasing the water pressure in the valve chamber.
Includes valve body, frame-shaped valve body, and tubular packing,
The valve body includes the valve chamber, the primary side inflow port of the fire extinguishing agent, and the secondary side outlet of the fire extinguishing agent. The valve body is provided so as to face each other, and the frame-shaped valve body and the tubular packing are housed inside the valve chamber.
The frame-shaped valve body includes a block body that blocks the flow of the fire extinguishing agent, and a plurality of supporters that support the block body in the middle of the flow path and allow the fire extinguishing agent to pass through.
The tubular packing is a tubular body made of an elastically deformable material, has an inner shape corresponding to the outer shape of the frame-shaped valve body, and can accommodate the frame-shaped valve body inside. When the water pressure on the outside of the tubular packing in the valve chamber is equal to or higher than the water pressure on the inside, the first form is in close contact with the frame-shaped valve body, and the fire extinguishing agent flows together with the frame-shaped valve body. When the passage is closed and the water pressure on the outside of the tubular packing in the valve chamber is lower than the water pressure on the inside, the second form separates from the frame-shaped valve body and opens the flow path of the fire extinguishing agent. Simultaneous release valve for firefighting equipment. The simultaneous release valve for firefighting equipment according to claim 1, wherein the primary side inflow port, the secondary side outflow port, the frame-shaped valve body, and the tubular packing share a central axis with each other. The frame-shaped valve body includes two frames having a substantially truncated cone shape, and each frame is formed between a first ring plate having a small diameter and a second ring plate having a large diameter. The block body is supported between the two first ring plates facing each other, and the supporters of the above are arranged radially at regular intervals, and the simultaneous opening for firefighting equipment according to claim 1 or 2. valve. The simultaneous release valve for firefighting equipment according to claim 3, wherein each of the first ring plate, the second ring plate, and the plurality of supporters constituting the frame is made of stainless steel plate. Grooves arranged radially are formed in each of the first and second ring plates.
At both ends of each supporter, a missing step portion and a protrusion portion protruding from the step portion are provided.
The simultaneous release valve for firefighting equipment according to claim 4, wherein each supporter is welded to the first and second ring plates with the protrusion inserted into the groove. A support plate interposed between the two first ring plates facing each other is provided.
By fixing the two block bodies from the back surface side of each of the two first ring plates to the front surface and the back surface of the support plate, the two frame bodies, the support plate and the two block bodies can be formed. The simultaneous release valve for firefighting equipment according to any one of claims 3 to 5, which constitutes the frame-shaped valve body integrally assembled. The simultaneous release valve for firefighting equipment according to claim 6, wherein each of the two block bodies has a substantially conical shape, and the bottom surface of each block body is fixed to the front surface and the back surface of the support plate, respectively. The peripheral edge of the support plate protrudes slightly outward from the peripheral edge of the two first ring plates.
A recess having a shape corresponding to the peripheral edge of the support plate is provided in the center of the inner surface of the tubular packing, and when the tubular packing is in the first form, the recess is the peripheral edge of the support plate. The simultaneous release valve for firefighting equipment according to claim 6 or 7, which is in close contact with the part. A primary side joint connected to the piping of the primary side flow path and a secondary side joint connected to the piping of the secondary side flow path are provided, and the primary side joint is the primary side of the valve body. The simultaneous firefighting equipment according to any one of claims 1 to 8, which is interchangeably connected to the inflow port and the secondary side joint is interchangeably connected to the secondary side outlet of the valve body. Open valve. A water supply pipe connected between the valve body and the primary side joint and for supplying a fire extinguishing agent from the primary side joint into the valve chamber.
A drainage pipe connected to the valve body for draining the fire extinguishing agent in the valve chamber,
9. The simultaneous release valve for firefighting equipment according to claim 9. Claimed that the primary side joint has a groove for connecting to one flange of the pipe of the primary side flow path or a coupling of the pipe of the primary side flow path. Item 9. A simultaneous release valve for firefighting equipment according to item 9. Claimed that the secondary side joint has a groove for connecting to one flange of the pipe of the secondary side flow path or a coupling of the pipe of the secondary side flow path. Item 2. The simultaneous release valve for firefighting equipment according to any one of Items 9 to 11. An open type including the simultaneous release valve for firefighting equipment according to any one of claims 1 to 12 and a plurality of open type sprinkler heads to which a fire extinguishing agent is simultaneously supplied from the simultaneous release valve for firefighting equipment. Sprinkler equipment. The simultaneous release valve for firefighting equipment according to any one of claims 1 to 12, and the detecting means for detecting the flow of the fire extinguishing agent when the flow path of the simultaneous release valve for firefighting equipment is opened. Pre-actuated water flow detection device equipped.

Images