JP2007330607A - Water flow detector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To certainly close an intake port of a water flow detector in a closed state of a butterfly valve. <P>SOLUTION: This water flow detector is used in a pre-operation type sprinkler facility for opening and closing a pipe with a control valve 1, and detects water flow with the water pressure introduced through the intake port 21 opening in the pipe in an opened state. The butterfly valve is used as the control valve 1, the intake port 21 is opened toward the end face 2a of a valve element 2 of the butterfly valve, and a projection 25 made of an elastic body coming into the intake port 21 in the closed state and water-tightly closing the intake 21 is disposed on the end face 2a of the valve element 2 facing the opening of the intake port 21. Since the projection 25 made of the elastic body comes into the intake port 21 following valve closing, even in a state just before the face direction of the valve element 2 becomes orthogonal to the pipe axis direction of the pipe, the projection 25 comes into the intake port 21 and water-tightly closes the intake port 21 as long as the control valve 1 is in the closed valve state. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a flowing water detection device used in a fire extinguishing sprinkler facility.

  In general, the water flow detection device used for fire extinguishing sprinkler equipment is installed in the middle of the pipe that leads to the sprinkler head installed on the ceiling of the building, and the sprinkler equipment is activated by detecting the water flowing in the pipe. The purpose is to send a predetermined alarm indicating that the user is doing.

For example, Patent Literature 1 discloses a technique of a flowing water detection device used in a sprinkler facility called wet.
In the wet sprinkler facility, the pipe leading to the sprinkler head is always maintained in a state of being filled with water, and the sprinkler head is provided with a heat sensitive part and sealed at room temperature.
When a fire occurs and the heat sensitive part melts with heat, the sealed part is opened and water discharge is started. When running water is generated in the pipe due to the water discharge, the valve body of the check valve provided in the middle of the pipe opens, and the flow path of the running water detector that has been blocked by the valve body is opened. Water pressure acts on the alarm device. When the water pressure acts on the alarm device, a predetermined alarm indicating that running water is generated in the pipe is issued.
JP 2005-95373 A

The flowing water detection device is also used in a sprinkler facility called a pre-actuated type.
In the pre-actuated sprinkler facility, pressurized air is filled on the secondary side and pressurized water is filled on the primary side across a control valve provided in the middle of the pipe leading to the sprinkler head. The sprinkler head is provided with a heat sensitive part as in the case of the wet type.
When a sensor provided separately from the sprinkler head detects the occurrence of a fire, the control valve is opened, the heat sensitive part of the sprinkler head is melted, the seal is opened, and water discharge is started.
Thus, water discharge is started by simultaneously opening the control valve and opening the seal of the heat sensitive part, and prevents erroneous water discharge due to malfunction of the device (for example, Patent Document 2, (See Patent Document 3).
JP-A-6-79014 Japanese Utility Model Publication No. 2-35760

In this pre-actuated sprinkler equipment, the valve type of the control valve is a ball valve type as shown in the above-mentioned Patent Document 2 in order to control the water supply to the sprinkler head based on the pressure difference between the primary side and the secondary side. Often things are adopted.
However, since the ball valve has a complicated mechanism and a large size, there is a case where a smaller and simpler valve type is desired.

  In that respect, the swing valve (swing valve) shown in Patent Document 3 has the advantage that the mechanism is not as complicated as the ball valve, and the device is relatively small.

However, the swing valve of the swing valve has a large swing radius because the rotary shaft of the valve body is provided on the outside of the valve hole or on either side from the center of the valve hole. A large swing radius of the valve body leads to an increase in the size of the valve box.
For this reason, in order to further reduce the size of the control valve, it can be said that it is desirable to employ a butterfly valve in which the rotating shaft of the valve body crosses the valve hole. This is because the butterfly valve can have a smaller swinging radius (turning radius) of the valve body than a swing valve having a valve hole of the same diameter.

When a butterfly valve is adopted as the control valve, it becomes a problem where the intake port of the water flow detector is installed.
In general, a butterfly valve has a large area where the valve body and the valve seat do not come into surface contact like a swing valve or a ball valve. For example, as shown in FIG. The ring 8 and the valve seat 7 provided around the valve hole are annularly contacted in a region w having a small width (width in the tube axis direction), and the water tightness between the primary side and the secondary side due to the contact in the narrow region w. Is maintained.
Since the width of the contact region w between the seat ring 8 and the valve seat 7 is narrow, even if the intake port 21 is opened in the valve seat 7 in the region w, the intake port is blocked as the valve body 2 opens and closes. It is difficult to open. This is because the width of the contact area w is close to or smaller than the inner diameter of the water intake.
Therefore, for example, as shown in Patent Document 3, the intake port of the water flow detection device is opened so as to face the end surface of the valve body, and a valve (protrusion) provided on the end surface of the valve body closes the opening of the intake port. The method to make is possible. Since the end surface of the valve element has a large area, it is suitable to close the intake port with the opening / closing operation of the valve body if the intake port of the water flow detection device faces the end surface.

  However, as shown in FIG. 7B, the butterfly valve is in a state (solid line state) slightly before the state in which the surface direction of the valve body 2 is orthogonal to the pipe axis direction of the pipe (chain line state), The valve closing operation may stop. In the state shown by the solid line, although the valve hole of the control valve is closed, the intake port of the flowing water detection device is not blocked, so that air pressure or water pressure acts on the flowing water detection device. For this reason, since the situation where an alarm device does not operate normally may occur, it is not preferable.

  Then, this invention makes it a subject to close the water intake of a flowing water detection apparatus reliably in the valve closing state of a butterfly valve.

  In order to solve the above problems, the present invention is used in a pre-actuated sprinkler facility that opens and closes a primary side and a secondary side of a pipe by a control valve, and opens into the pipe when the control valve is open. In the water flow detection device that detects the flow of water in the pipe by the water pressure introduced from the water intake, the control valve is a butterfly valve, and the water intake is on the end face of the valve body of the butterfly valve in the closed state Protrusions made of an elastic body that opens oppositely and enters the water intake port in a closed state and closes the water intake port at the end face of the valve body or the front end of the water intake port facing the opening of the water intake port. The provided configuration was adopted.

Since the protrusion made of an elastic body enters the intake port of the water flow detection device when the valve is closed, the valve body of the control valve is in a state where the surface direction of the valve body is perpendicular to the pipe axis direction of the pipe Even if the valve is closed in a state just before reaching (hereinafter referred to as “completely closed state”) (hereinafter referred to as “slowly closed state”), the protrusion enters the water intake and makes the water intake watertight. Can be closed.
In addition, the protrusion height of the protrusion, that is, the length that the protrusion can enter the water intake port is an error in the orientation of the valve body that is assumed in the valve-closed state (the stroke difference between the fully closed state and the slowly closed state). It can be set according to.
For example, the protrusion may be provided on the valve body side so that the valve body enters the water intake port as the valve body rotates in the valve closing direction, or a member provided with the protrusion is taken into the tip of the water intake port. The member provided with the protrusion is urged toward the open side (front end side) of the water inlet so that the valve body rotates in the valve closing direction. It is good also as a structure which is pushed into the obstruction | occlusion side (rear end side) of a water intake port against the said urging | biasing force, and a protrusion penetrates into a water intake port. As for the shape of the protrusion, the tip may be tapered so that it easily enters the water intake, or the inner peripheral surface of the water intake may be tapered.

  Further, as another means, it is used in a pre-acting sprinkler facility that opens and closes the primary side and secondary side of the pipe by a control valve, and is introduced from a water intake opening that opens into the pipe when the control valve is open. In the water flow detection device for detecting the flow of water in the pipe by the water pressure to be used, the control valve is a butterfly valve, and the water intake is opened facing the end face of the valve body of the butterfly valve in a closed state, A cylindrical member made of an elastic body is provided at the tip of the water intake port so as to be able to advance and retreat in the direction of the cylinder axis, and the inner peripheral portion of the cylindrical member is in watertight communication with the inside of the water intake port and the valve facing the cylindrical member The valve body is urged toward the end surface of the body, and the valve body rotates in the valve closing direction so that the end surface of the valve body abuts on the tip of the cylindrical member and the water intake is closed in a watertight manner. By rotating in the valve closing direction. Tubular member adopts the configuration is pushed into the rear end side by the valve body.

  When the cylindrical member made of an elastic body comes into contact with the end surface of the valve body as the valve body rotates in the valve closing direction, the water intake is closed in a watertight manner, and then the valve body further rotates. The tubular member is kept in contact with the end face of the valve body while being pushed in, and the water intake is also kept closed. For this reason, even if the control valve is in any state between the fully closed state and the slowly closed state, the inside of the water intake can be closed watertight.

  Further, as another means, it is used in a pre-actuated sprinkler facility that opens and closes the primary side and secondary side of the pipe by a control valve, and is introduced from a water intake opening in the pipe when the control valve is open. In the water flow detection device for detecting the flow of water in the pipe by the water pressure to be used, the control valve is a butterfly valve, and the water intake is opened facing the end face of the valve body of the butterfly valve in a closed state, A cylindrical member made of an elastic body is provided at the tip of the intake port, the inner peripheral portion of the cylindrical member is communicated with the inside of the intake port in a watertight manner, and the valve body rotates in the valve closing direction, thereby A configuration is adopted in which the water intake is closed in a water-tight manner by causing the end surface to contact the cylindrical member and deform the cylindrical member.

  In this configuration, the cylindrical member made of an elastic body is configured such that the end face of the valve body comes into contact with the cylindrical member in a state where the valve body reaches a certain opening degree as the valve body rotates in the valve closing direction. The shaped member is deformed. If the water intake is closed in a watertight manner due to this deformation, then, when the valve body is further rotated, the tubular member is maintained in its deformation, or further deformed and the water intake is maintained in a closed state. For this reason, even if the control valve is in any state between the fully closed state and the slowly closed state, the inside of the water intake can be closed watertight.

  Next, it is used in a pre-acting sprinkler facility that opens and closes a primary side and a secondary side of a pipe by a control valve, and the water pressure introduced from a water intake opening in the pipe when the control valve is open. In the water flow detection device for detecting the flow of water in the pipe, the control valve is a butterfly valve, the water intake is opened to the side of the end face of the valve body of the butterfly valve in a closed state, and the tip of the water intake A contact surface portion extending in a direction intersecting with the pipe axis direction of the pipe is formed, and the valve body is rotated in the valve closing direction on the end surface of the valve body facing the opening of the water intake port. A configuration is adopted in which a closed surface portion is provided that contacts the contact surface portion of the mouth and closes the water intake port in a watertight manner by the contact.

  In this configuration, the tip of the water intake port and the valve body have a contact surface portion and a closing surface portion, respectively, and the valve body reaches a certain degree of opening as the valve body rotates in the valve closing direction. The contact surface portion and the closed surface portion contact each other. The abutment is such that after the both surface portions abut once and the intake port is closed in a watertight manner, the valve body is further rotated, and then the intake port is closed while the contact force on the contact portion increases. Maintained. For this reason, even if the control valve is in any state between the fully closed state and the slowly closed state, the inside of the water intake can be closed watertight. In addition, if an elastic body is arrange | positioned in any one or both of the said contact surface part and a closing surface part, since the elastic body will maintain the contact | adherence, deform | transforming suitably, it is easy to maintain the watertight obstruction | occlusion of a water intake.

  In addition, the pipe is used by a pre-actuated sprinkler facility that opens and closes a primary side and a secondary side of the pipe by a control valve, and is supplied by water pressure introduced from a water intake opening in the pipe when the control valve is open. In the flowing water detection device for detecting the flow of water in the inside, the control valve is a butterfly valve, and a plurality of seat rings are provided in parallel around the entire circumference of the valve body of the butterfly valve. The outer periphery is in contact with the valve seat of the control valve, and the water intake port passes through the valve seat and opens in the pipe between contact portions of the valve seat and the seat rings in the closed state. Adopted.

If a plurality of seat rings are provided in parallel on the valve body, out of the seat rings contacting the valve seat in the fully closed state, both seat rings located on both sides in the tube axis direction and on the outermost side are respectively provided on the valve seat. Overlapping part is set between the area sandwiched between the contacted parts and the area sandwiched between the two seat rings located on both sides in the tube axis direction and the outermost part in the loosely closed state. can do. At this time, the space partitioned by the both seat rings and the valve seat located at the outermost side in the tube axis direction is always watertight by the both seat rings and the valve seat between the fully closed state and the slowly closed state. It is maintained and the water pressure in the piping is not in effect.
Therefore, if the intake port is opened at the overlapping portion, the inside of the intake port can be tightly closed regardless of the state of the control valve between the fully closed state and the slowly closed state.

  Furthermore, it is used in a pre-acting sprinkler facility that opens and closes a primary side and a secondary side of a pipe by a control valve, and the pipe is caused by water pressure introduced from a water intake opening in the pipe when the control valve is open. In the flowing water detection device for detecting the flow of water in the inside, the control valve is a butterfly valve, a seat ring is provided on the entire circumference of the valve body of the butterfly valve, and the outer periphery of the seat ring faces the valve seat of the control valve. The structure which made it contact and the said water intake port penetrated the said valve seat and was opened in the said piping by the contact surface of the said valve seat and the said seat ring was employ | adopted.

  If the seat ring of the valve body is configured to come into surface contact with the valve seat of the control valve, the intake port is provided through the valve seat in the surface contact area so that the valve body of the control valve is In any state between the closed state and the slowly closed state, the intake port can be set to be watertightly closed. In addition, the area which concerns on the surface contact needs to be wider than the diameter of the water intake (pipe axis direction width).

  In addition, the pipe is used by a pre-actuated sprinkler facility that opens and closes a primary side and a secondary side of the pipe by a control valve, and is supplied by water pressure introduced from a water intake opening in the pipe when the control valve is open. In the water flow detection device for detecting the flow of water in the inside, the control valve is a butterfly valve, the valve seat of the butterfly valve is provided movably in the pipe axis direction, and the water intake faces the valve seat and the pipe The valve seat was moved in the tube axis direction by opening the inside of the butterfly valve in the valve closing direction, and the water intake was closed watertight.

  In this configuration, the valve seat is allowed to move in the tube axis direction within a certain range. Therefore, the valve body comes into contact with the valve seat as it rotates in the valve closing direction, and the valve seat is thereby contacted. Moves in the direction of the pipe axis and closes the water intake tightly. After the water intake is closed tightly, if the valve body is further rotated, the valve seat stops moving while the water intake is closed, and the valve body is further rotated to the fully closed state. To do. For this reason, even if the control valve is in any state between the fully closed state and the slowly closed state, the inside of the water intake can be closed watertight. In addition, after a valve seat closes a water intake, it is good also as a structure which a valve seat moves to a pipe-axis direction further with rotation in the valve closing direction further. At this time, after the valve seat closes the intake port in the loosely closed state, the intake port is always kept closed even if the valve seat moves further in the tube axis direction until the valve seat reaches the fully closed state. It is necessary.

  In addition, the pipe is used by a pre-actuated sprinkler facility that opens and closes a primary side and a secondary side of the pipe by a control valve, and is supplied by water pressure introduced from a water intake opening in the pipe when the control valve is open. In the water flow detection device for detecting the flow of water in the water, the control valve is a butterfly valve, the intake port is opened through the valve seat of the butterfly valve, and the valve body of the butterfly valve is closed. A configuration was adopted in which the valve seat was deformed by rotating in the valve direction and the water intake was closed in a watertight manner.

  In this configuration, as the valve body rotates in the valve closing direction, the valve body comes into contact with the valve seat and deforms the valve seat in a state of reaching a certain opening degree. If the water intake is closed in a watertight manner by this deformation, then the valve seat is further deformed when the valve body is further rotated, or is further deformed to maintain the water intake closed. For this reason, even if the control valve is in any state between the fully closed state and the slowly closed state, the inside of the water intake can be closed watertight.

  Furthermore, it is used in a pre-acting sprinkler facility that opens and closes a primary side and a secondary side of a pipe by a control valve, and the pipe is caused by water pressure introduced from a water intake opening in the pipe when the control valve is open. In the water flow detection device for detecting the flow of water in the inside, the control valve is a butterfly valve, the water intake port is opened in the axial direction toward the valve body of the butterfly valve, and a closing member is provided at the tip of the water intake port Is provided so as to be able to advance and retreat in the tube axis direction so that the intake port can be opened and closed by the advancement and retraction, and the closing member is urged toward the valve body by a spring, and the valve body is closed in the closing member. A spring that abuts against the end face of the valve body by rotating the spring, and the elastic force of the spring that urges toward the valve body side is set to be weaker than the elastic force of the spring that abuts against the end face of the valve body Configuration And use.

  In this configuration, as the valve body rotates in the valve closing direction, the spring provided on the closing member comes into contact with the end surface of the valve body in a state where the opening degree reaches a certain degree. Thereafter, when the valve body further rotates in the valve closing direction, a spring having a weaker elastic force, that is, a spring that urges the closing member toward the valve body is compressed, and the closing member closes the water intake port in a watertight manner. Further, when the valve body rotates in the valve closing direction, the spring with the weaker elastic force is not further compressed, so the spring with the stronger elastic force, that is, the spring that contacts the end face of the valve body is compressed, The water intake is kept closed. For this reason, even if the control valve is in any state between the fully closed state and the slowly closed state, the inside of the water intake can be closed watertight.

  In the present invention, in the state where the butterfly valve type control valve is closed, any of the state between the state in which the surface of the valve body is orthogonal to the pipe axis direction of the pipe and the state slightly before the orthogonal state Even in this state, the water intake of the water flow detector can be reliably closed.

(First embodiment)
A first embodiment will be described with reference to FIGS. 1 to 3. In the water flow detection device of this embodiment, in a fire extinguishing sprinkler facility, a control valve 1 of a butterfly valve type is provided in the middle of a pipe leading to a sprinkler head installed on a ceiling or the like in a building. Pressurized air is supplied to the secondary side 4 across the control valve 1 and water is supplied to the primary side 3 at a predetermined water pressure. Further, the sprinkler head is provided with a heat sensitive part that melts at a predetermined temperature, and the heat sensitive part hermetically seals the inside of the pipe on the secondary side 4 at room temperature.

  In addition to the sprinkler head, a sensor is also installed on the ceiling or the like. When this sensor detects the occurrence of a fire, the valve body 2 of the control valve 1 is opened. Also, in the event of a fire, the heat sensitive part of the sprinkler head melts at the same time and the seal is opened, so that the water that has flowed into the secondary side 4 due to the opening of the control valve 1 has been filled in the secondary side 4 As air is pushed out, water discharge begins.

  When the control valve 1 is opened and water flows from the primary side 3 to the secondary side 4 of the piping, the flowing water detection device detects the flowing water generated in the piping, and the sprinkler equipment is activated. A predetermined alarm indicating that the user is present is transmitted.

As shown in FIGS. 3 (a) and 3 (b), the detection of the flowing water is performed by using the water intake pipe 31, the water pressure introduced from the water intake 21 that opens into the pipe only when the control valve 1 is open. Detection is performed by the alarm pressure switch 30 via the pipe 33. The alarm pressure switch 30 can detect the presence / absence of flowing water based on the difference between the pressure when there is no flowing water in the pipe and the pressure when flowing water is generated.
In the figure, "32" is an orifice for ensuring the action of water pressure on the alarm pressure switch 30, "38" is a drain outlet for discharging water that has passed through the orifice, and "33a" is a signal stop. It is a valve. “34” is a pressure gauge intake pipe leading to the secondary pressure gauge 34b, and “34a” is a gauge valve. Further, reference numeral “36” is a pressure gauge intake pipe leading to the primary pressure gauge 37, “36a” is a gauge valve, “35” is a communication pipe, and “35a” is a test valve.

  Further, the control valve 1 includes a pressure switch 40 for pressure reduction alarm that operates based on the water pressure on the primary side 3 and the air pressure on the secondary side 4. As shown in FIG. 3, the decompression alarm intake pipes 41 and 42 drawn from the primary side 3 and the secondary side 4 through the on-off valves 41 a and 42 a are connected by a communication pipe 44, respectively. One of the communication pipes 44 communicates with the pressure reducing alarm pressure switch 40 via the branch pipe 43 and the signal stop valve 43a, and the other communicates with the discharge port 46 via the discharge pipe 45 and the discharge valve 45a.

The intake pipe 31 leading to the alarm pressure switch 30 is connected to the intake pipe 20 inserted into the valve box 5. The intake pipe 20 is inserted into and joined to a pipe-diameter through hole formed on the secondary valve chamber 4 side of the valve box 5, and its tip 22 bends 90 degrees toward the primary valve chamber 3 side. ing.
The intake pipe 20 constitutes a water intake (intake channel) 21 for the water flow detection device, and the tip 22 of the water intake 21 is located on the periphery of the end surface 2 a of the valve body 2 when the control valve 1 is closed. It opens to the near part.

  On the end surface 2a of the valve body 2 facing the opening of the water intake 21, when the valve body 2 is closed, the protrusion enters the water intake 21 and closes the water intake 21 in a watertight manner. 25 is provided. The protrusion 25 is formed of a deformable elastic body such as rubber, and may be cylindrical or columnar as long as it fits snugly into the water intake 21 and closes the water intake 21. It may be. In this embodiment, the projection 25 has a cylindrical shape in accordance with the shape of the water intake 21 having a circular cross section.

  When the valve body 2 rotates in the valve closing direction, that is, in the direction opposite to the arrow A shown in FIG. 2, the protrusion 25 enters the water intake 21. At this time, the tip of the projection 25 is formed with a tapered surface that gradually becomes thinner toward the tip, so that it easily enters the water intake 21.

The valve body 2 indicated by a solid line in FIG. 2 shows a completely closed state in which the surface direction of the valve body 2 is orthogonal to the pipe axis direction of the pipe, and the valve body 2 contacts the stopper 9 and does not rotate any more. It is like that. The chain line in the figure shows the loosely closed state slightly before reaching the fully closed state, and in any state, the control valve 1 is in the closed state, and the primary side valve chamber 3 to the secondary side valve chamber. The distribution of water to 4 has stopped.
Since the protrusion 25 has a certain length in the tube axis direction, the protrusion 25 enters the water intake 21 at any position during the transition from the fully closed state to the slowly closed state. The mouth 21 can be closed watertight. In addition, the protrusion height from the end surface 2a of the protrusion 25, that is, the length that the protrusion 25 can enter the water intake 21 is set in consideration of the stroke difference between the fully closed state and the slowly closed state. Can do.

(Second embodiment)
FIG. 4A shows a second embodiment. In this embodiment, instead of the projection 25 of the first embodiment, a cylindrical member (tube) 26 made of an elastic body is provided at the tip 22 of the water intake 21. The cylindrical member 26 is provided so as to be able to advance and retract in the cylinder axis direction with respect to the water intake port 21, and is prevented from falling off when the locking portions 22 a and 26 a are locked.
The inner peripheral portion of the cylindrical member 26 is in watertight communication with the inside of the water intake 21 at any of the advancement and retreat positions. Moreover, the cylindrical member 26 is urged | biased toward the end surface 2a of the valve body 2 which opposes with the spring 26b.

  When the valve body 2 rotates in the valve closing direction, the end surface 2a of the valve body 2 comes into contact with the tip of the cylindrical member 26 and closes the water intake 21 in a watertight manner. A chain line state shown in FIG. 4A indicates the loosely closed state. Further, when the valve body 2 rotates in the valve closing direction, the tubular member 26 is pushed to the rear end side by the valve body 2 and reaches a fully closed state shown by a solid line in the figure. During this time, the tip of the cylindrical member 26 is always in close contact with the end surface 2a of the valve body 2, and the water intake 21 is always watertightly closed.

(Third embodiment)
FIG. 4B shows a third embodiment. In this embodiment, instead of the cylindrical member 26 of the second embodiment, a cylindrical member (tube) 27 that is deformed by contacting the end surface 2a of the valve body 2 is provided.
The inner peripheral portion of the tubular member 27 communicates with the inside of the water intake 21 in a watertight manner. When the valve body 2 rotates in the valve closing direction, the end surface 2 a of the valve body 2 is connected to the tubular member 27. The water intake 21 is closed in a watertight manner by abutting and bending and deforming the cylindrical member 27 as shown in the figure. The valve body 2 indicated by a solid line in FIG. 4B shows the fully closed state. A chain line indicates the loosely closed state. During the period from the slowly closed state to the fully closed state, the intake port 21 is always watertightly closed by the deformation of the cylindrical member 27.

(Fourth embodiment)
FIG. 4C shows a fourth embodiment. In this embodiment, instead of the protrusion 25 of the first embodiment, a closing member 28 having a protrusion 28a made of an elastic body is provided on the water intake 21 side.

The structure of the closing member 28 will be described. A cylindrical case 28d is fitted to the tip 22 of the water intake 21 and a locking lid 28c is fitted and fixed to the tip end surface of the case 28d. The inside of the case 28d communicates with the inside of the water intake 21 only through a through hole 28e formed at the center of the rear end side end surface, and the front end side is connected to the inside of the pipe through a through hole 28f formed in the locking lid 28c. Always communicate with.
The closing member 28 includes a spherical portion at the tip and a cylindrical portion (projection) 28a at the rear end, and is housed in the case 28d and is urged toward the tip by a spring 28b.

By rotating the valve body 2 in the valve closing direction, as shown in FIG. 4C, the end surface 2a of the valve body 2 comes into contact with the spherical surface portion of the closing member 28 protruding from the locking lid 28c. The closing member 28 is pushed toward the rear end side, and the cylindrical portion (projection) 28a enters the through hole 28e to close the water intake 21 in a watertight manner. A solid line state shown in FIG. 4C indicates the fully closed state. A chain line indicates a loosely closed state. During the period from the slowly closed state to the fully closed state, the cylindrical portion 28a of the closing member 28 always enters the through hole 28e and closes the water intake 21 in a watertight manner (see FIG. 4D). Stroke s).
At this time, since the tip of the closing member 28 has a spherical shape, even if the contact angle with the end surface 2a of the valve body 2 rotating around the valve shaft 6 varies, the cylindrical member ( A stable pushing force can always be applied in the direction in which the projection 28a enters the through hole 28e.

(Fifth embodiment)
FIG. 4 (e) shows a fifth embodiment. In this embodiment, instead of the water intake pipe 20 of each of the above embodiments, a water intake pipe 20 that extends straight in the radial direction of the valve box 5 and does not bend in the pipe axis direction is employed.
Since the intake pipe 20 is linear, the intake pipe 20 is screwed into the valve box 5 via the screw portions 23 and 24 and can be easily fixed. Moreover, removal is also easy. Reference numeral “20a” in the figure is a packing.

A cylindrical member 27 made of an elastic material such as rubber is attached to the tip of the water intake 21. At the tip of the tubular member 27, an inclined surface (abutment surface portion) 29a is formed which gradually moves away from the inner peripheral surface of the pipe as it is away from the end surface 2a of the valve body 2 in the valve-closed state.
Further, the end surface 2a of the valve body 2 facing the inclined surface 29a abuts on the inclined surface 29a when the valve body 2 rotates in the valve closing direction, and the water intake 21 is brought into contact with the end surface 2a. A protrusion 29 having an inclined surface (closed surface portion) 29b that closes water tightly is provided.

When the valve body 2 rotates in the valve closing direction, the inclined surface 29b of the projection 29 provided on the valve body 2 abuts on the inclined surface 29a of the cylindrical member 27 to close the water intake 21 in a watertight manner. . The chain line state shown in FIG. 4 (e) indicates the loosely closed state. Further, when the valve body 2 is rotated in the valve closing direction, the cylindrical member 27 is pushed to the secondary side 4 by the projection 29 and reaches a fully closed state shown by a solid line in the figure. During this time, the inclined surfaces 29a and 29b of the cylindrical member 27 and the projection 29 are always in surface contact with each other, and the water intake 21 is always closed in a watertight manner.
In addition, the surface direction of the said contact surface part 29a and the said closing surface part 29b is not limited to the aspect shown in FIG.4 (e), The surface direction of the contact surface part 29a cross | intersects the pipe-axis direction of the said piping. In the valve body 2 side, the valve body 2 is closed in contact with the contact surface portion 29a by rotating in the valve closing direction, and the water intake 21 is closed in a watertight manner by the contact. What is necessary is just to provide the surface part 29b. The configuration of the contact surface portion 29a and the closing surface portion 29b may be a flat inclined surface or an inclined surface with a curved surface as long as the intake port 21 can be closed.

(Sixth embodiment)
FIG. 5A shows a sixth embodiment. In this embodiment, two seat rings 8, 8 are provided in parallel on the entire circumference of the valve body 2, and each seat ring 8, 8 is in any closed state from the fully closed state to the slowly closed state. The water intake 21 of the water flow detector is provided so as to penetrate the valve seat 7 in the radial direction. The opening position of the water intake 21 into the pipe is between the contact portions of the valve seat 7 and the seat rings 8 and 8 in the closed state. The valve body 2 shown in the drawing shows a completely closed state.
From the fully closed state to the loosely closed state in which the valve body 2 is slightly rotated in the valve opening direction, the opening of the water intake 21 can be always sandwiched between the two seat rings 8 and 8 and closed in a watertight manner. it can.

(Seventh embodiment)
FIG. 5B shows a seventh embodiment. In this embodiment, instead of the two seat rings 8 and 8 of the sixth embodiment, a single seat ring 8 is provided, and the seat ring 8 has a seal that makes surface contact with the valve seat 7 of the control valve 1 on the outer periphery thereof. A surface is provided.
A water intake 21 of the water flow detection device is provided so as to penetrate the valve seat 7 in the radial direction, and is opened in the pipe at a contact surface between the valve seat 7 and the seat ring 8. Since the opening of the water intake 21 is in the contact surface between the valve seat 7 and the seat ring 8, the water intake 21 is always closed until the valve body 2 is moved from the fully closed state to the slowly closed state.

(Eighth embodiment)
FIG. 5C shows an eighth embodiment. In this embodiment, a valve seat 51 (7) made of a deformable elastic body such as rubber is fitted into a groove in the circumferential direction formed in the valve box 5 and fixed. On the valve seat 51, a ridge 51a extending in the tube axis direction is formed over the entire circumference, and the ridge 51a meshes with a recess 51b formed in the groove of the valve box 5 to prevent its dropout. Is done.
The water intake 21 faces the end surface in the pipe axis direction of the valve seat 51 and opens into the pipe, and the valve seat 51 is urged to the right in the drawing by a spring 51c.
For this reason, in the valve open state, the water intake 21 is in a state in which its tip 22 is opened in the pipe (a chain line position in the figure), and the valve body 2 is rotated in the valve closing direction to be in the gently closed state. If it arrives, the said valve seat 51 will move to the left side in the figure, and will close the said water intake 21 watertightly. After the intake port 21 is closed, the movement of the valve seat 51 is stopped and the valve body 2 is rotated until the valve body 2 is completely closed. During this time, the water intake 21 is always watertightly closed.

In addition, as shown in FIG.5 (d), in the end surface of the valve seat 51 of the side facing the front-end | tip 22 of the said water intake 21, it penetrates in the said water intake 21 in a valve closing state, and the water intake 21 is made watertight. A configuration in which the protrusion 51d made of the closing elastic body is provided can also be employed.
Since the protrusion 51d has a certain length in the tube axis direction, the protrusion 51d is placed in the water intake 21 at any position during the period from the fully closed state of the valve body 2 to the slowly closed state. It can be set to enter and close the water intake 21 in a watertight manner. The protrusion height of the protrusion 51d from the end face of the valve seat 51, that is, the length by which the protrusion 51d can enter the intake port 21 takes into account the stroke difference between the fully closed state and the slowly closed state. Can be set.

  Further, at the tip 22 of the water intake 21 shown in FIG. 5 (c), the tubular member 26 which can be moved forward and backward shown in FIG. 4 (a), or the deformable tubular member 27 shown in FIG. 4 (b), or A configuration in which the closing member 28 shown in FIG.

(Ninth embodiment)
FIG. 5E shows a ninth embodiment. In this embodiment, the water intake 21 of the water flow detection device passes through the valve seat 52 (7) and opens into the pipe, and the seat ring 8 provided in the valve body 2 when the control valve 1 is closed. In this configuration, the water intake 21 is closed in a water-tight manner by deforming the valve seat 52 by abutting the outer periphery of the valve seat 52.
The valve seat 52 (7) is made of a deformable elastic body such as rubber, and is fitted and fixed in a groove on the entire circumference in the circumferential direction formed in the valve box 5. On the valve seat 52, a protrusion 52a extending in the tube axis direction is formed over the entire circumference, and the protrusion 52a meshes with a recess 52b formed in a groove of the valve box 5 to prevent its dropout. Is done.
The water intake 21 passes through the valve seat 52 and opens into the pipe. In the valve open state, the water intake 21 is in a state where its tip 22 is opened in the pipe. When the valve body 2 is rotated in the valve closing direction to reach the above-mentioned slowly closed state, the valve seat 52 is deformed as shown in the figure, and then the valve body 2 is rotated until the valve body 2 is fully closed. During this time, the water intake 21 is always watertightly closed.

(Tenth embodiment)
The tenth embodiment is shown in FIGS. 6 (a) and 6 (b). This embodiment is used in a pre-acting sprinkler facility that opens and closes a primary side 3 and a secondary side 4 of a pipe by means of a control valve 1, and a water intake 21 that opens into the pipe when the control valve 1 is open. In the flowing water detection device for detecting the flow of water in the pipe by the water pressure introduced from the pipe, the control valve 1 is a butterfly valve, and the water intake 21 is directed toward the valve body 2 in the pipe axial direction of the pipe. A closing member 61 that is opened and movable in the direction of the pipe axis is provided at the water intake 21.

The closing member 61 is provided with a shaft-shaped guide member 61c. The guide member 61c is fitted into a guide hole 61d formed in the valve box 5, and the movement in the tube axis direction is guided.
Further, the closing member 61 is biased in a direction away from the water intake 21 by a spring 61 a provided at the tip 22 of the water intake 21, and is provided on the end member 2 of the valve body 2 on the closing member 61. It contacts through another spring 61b.

When the valve body 2 is in the closed state, the spring 61b of the closing member 61 is in contact with the end surface 2a of the valve body 2, and the closing member 61 is pushed up from the valve body 2 via the spring 61b to the intake port 21. It is in contact. In this state, the water intake 21 is closed (chain line state shown in FIG. 6B).
When the valve body 2 is rotated from the closed state to the open state, the closing member 61 released from the pushing force from the valve body 2 is separated from the water intake 21 by the urging force of the spring 61a, and the water intake 21 is It is opened (solid line state shown in FIG. 6B).
At this time, if the elastic force of the spring 61a is set to be weaker than the elastic force of the other spring 61b, the closing member 61 is always kept until the valve body 2 of the control valve 1 changes from the loosely closed state to the fully closed state. The water intake 21 can be closed.

  In the above embodiment, the so-called dry pre-acting sprinkler facility that fills the secondary side 4 with compressed air when the control valve 1 is closed has been described, but the present invention is also applicable to a wet pre-acting sprinkler facility that fills the secondary side 4. Is possible.

1 shows a first embodiment, (a) is a front view, (b) is an xx cross-sectional view of (a). Enlarged view of the main part of FIG. Explanatory drawing which shows the effect | action of a flowing water detection apparatus The principal part enlarged view which shows 2nd embodiment The principal part enlarged view which shows 3rd embodiment The principal part enlarged view which shows 4th embodiment FIG. 4 (c) shows the main part, where (a) shows the operation when the control valve is closed, and (b) shows the operation when the control valve is opened. The principal part enlarged view which shows 5th embodiment The principal part enlarged view which shows 6th embodiment The principal part enlarged view which shows 7th embodiment The principal part enlarged view which shows 8th embodiment Enlarged view of the main part of FIG. The principal part enlarged view which shows 9th embodiment The principal part enlarged view which shows 10th Embodiment Main part enlarged view of the conventional example

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Control valve 2 Valve body 2a End surface 3 Primary side (primary side valve chamber)
4 Secondary side (secondary valve chamber)
5 Valve box 6 Valve shaft 7 Valve seat 8 Seat ring 9 Stopper 20 Water intake pipe 20a Packing 21 Water intake 22 Opening (tip)
22a, 26a Locking portion 23, 24 Screw portion 25, 28a, 29 Protrusion 26, 27 Tubular member (tube)
26b, 28b Spring 28 Closing member 28c Locking tool 28d Case 28e, 28f Through hole 29a, 29b Inclined surface 30 Alarm pressure switch 31 Intake pipe 32 Orifice 33, 43 Branch pipe 33a, 43a Signal stop valve 34, 36 For pressure gauge Intake pipe 34a, 36a Gauge valve 34b Secondary side pressure gauge 35 Communication pipe 35a Test valve 37 Primary side pressure gauge 38 Discharge port
40 Pressure switch 41, 42 for depressurization alarm Intake pipe 41a, 42a for depressurization alarm 44 On-off valve 44 Communication pipe 45 Drain pipe 45a Drain valve 46 Drain

Claims (9)

Water pressure used in a pre-actuated sprinkler facility that opens and closes the primary side 3 and the secondary side 4 of the pipe by the control valve 1 and is introduced from a water intake 21 that opens into the pipe when the control valve 1 is open. In the flowing water detection device for detecting the flow of water in the pipe by
The control valve 1 is a butterfly valve, the intake port 21 is opened facing the end surface 2 a of the valve body 2 of the butterfly valve in the closed state, and the valve body 2 facing the opening of the intake port 21 is opened. Protrusion 25, 28a made of an elastic body that enters the water intake 21 in a valve-closed state and closes the water intake 21 in a watertight manner is provided at the end surface 2a or the front end of the water intake 21. . Water pressure used in a pre-actuated sprinkler facility that opens and closes the primary side 3 and the secondary side 4 of the pipe by the control valve 1 and is introduced from a water intake 21 that opens into the pipe when the control valve 1 is open. In the flowing water detection device for detecting the flow of water in the pipe by
The control valve 1 is a butterfly valve, the intake port 21 is opened facing the end surface 2a of the valve body 2 of the butterfly valve in the closed state, and a cylindrical member made of an elastic body at the tip of the intake port 21 26 is provided so as to be able to advance and retract in the direction of the cylinder axis, and the inner peripheral portion of the cylindrical member 26 is connected to the water intake 21 in a watertight manner, and the cylindrical member 26 is directed toward the end surface 2a of the valve body 2 that faces the cylindrical member 26. When the valve body 2 is urged and the valve body 2 rotates in the valve closing direction, the end surface 2a of the valve body 2 comes into contact with the tip of the cylindrical member 26 to close the water intake 21 in a watertight manner. The water flow detecting device is characterized in that the tubular member 26 is pushed into the rear end side by the valve body 2 by rotating in the valve closing direction. Water pressure used in a pre-actuated sprinkler facility that opens and closes the primary side 3 and the secondary side 4 of the pipe by the control valve 1 and is introduced from a water intake 21 that opens into the pipe when the control valve 1 is open. In the flowing water detection device for detecting the flow of water in the pipe by
The control valve 1 is a butterfly valve, the intake port 21 is opened facing the end surface 2a of the valve body 2 of the butterfly valve in the closed state, and a cylindrical member made of an elastic body at the tip of the intake port 21 27, the inner peripheral portion of the tubular member 27 is communicated with the water intake 21 in a water-tight manner, and the valve body 2 rotates in the valve closing direction, whereby the end surface 2a of the valve body 2 is moved to the tubular member. 27. The water flow detection device characterized in that the water intake 21 is closed in a watertight manner by abutting on the member 27 and deforming the cylindrical member 27. Water pressure used in a pre-actuated sprinkler facility that opens and closes the primary side 3 and the secondary side 4 of the pipe by the control valve 1 and is introduced from a water intake 21 that opens into the pipe when the control valve 1 is open. In the flowing water detection device for detecting the flow of water in the pipe by
The control valve 1 is a butterfly valve, the intake port 21 is opened to the side of the end surface 2a of the valve body 2 of the butterfly valve in a closed state, and the tip of the intake port 21 is arranged in the pipe axis direction of the pipe. A contact surface portion 29a extending in the intersecting direction is formed, and the valve body 2 rotates in the valve closing direction on the end surface 2a of the valve body 2 facing the opening of the water intake 21. A water flow detection device comprising a closing surface portion 29b that contacts the contact surface portion 29a and closes the water intake 21 in a watertight manner by the contact. Water pressure used in a pre-actuated sprinkler facility that opens and closes the primary side 3 and the secondary side 4 of the pipe by the control valve 1 and is introduced from a water intake 21 that opens into the pipe when the control valve 1 is open. In the flowing water detection device for detecting the flow of water in the pipe by
The control valve 1 is a butterfly valve, and a plurality of seat rings 8, 8 are provided in parallel on the entire circumference of the valve body 2 of the butterfly valve, and the outer periphery of each seat ring 8, 8 is the control valve in the closed state. 1 in contact with the valve seat 7, and the water intake 21 passes through the valve seat 7 between the contact portions of the valve seat 7 and the seat rings 8, 8 in the closed state. A flowing water detection device characterized in that it is opened. Water pressure used in a pre-actuated sprinkler facility that opens and closes the primary side 3 and the secondary side 4 of the pipe by the control valve 1 and is introduced from a water intake 21 that opens into the pipe when the control valve 1 is open. In the flowing water detection device for detecting the flow of water in the pipe by
The control valve 1 is a butterfly valve, a seat ring 8 is provided on the entire circumference of the valve body 2 of the butterfly valve, the outer periphery of the seat ring 8 is brought into surface contact with the valve seat 7 of the control valve 1, and the water intake 21 The water flow detecting device is characterized in that the valve seat 7 is opened in the pipe through the contact surface between the valve seat 7 and the seat ring 8. Water pressure used in a pre-actuated sprinkler facility that opens and closes the primary side 3 and the secondary side 4 of the pipe by the control valve 1 and is introduced from a water intake 21 that opens into the pipe when the control valve 1 is open. In the flowing water detection device for detecting the flow of water in the pipe by
The control valve 1 is a butterfly valve, the valve seat 7 of the butterfly valve is movably provided in the pipe axis direction, the water intake 21 faces the valve seat 7 and opens into the pipe, and the butterfly valve The water flow detection device characterized in that the valve seat 7 moves in the direction of the tube axis by the valve body 2 rotating in the valve closing direction to close the water intake 21 in a watertight manner. Water pressure used in a pre-actuated sprinkler facility that opens and closes the primary side 3 and the secondary side 4 of the pipe by the control valve 1 and is introduced from a water intake 21 that opens into the pipe when the control valve 1 is open. In the flowing water detection device for detecting the flow of water in the pipe by
The control valve 1 is a butterfly valve, the intake port 21 is opened in the pipe through the valve seat 7 of the butterfly valve, and the valve body 2 of the butterfly valve rotates in the valve closing direction. The flowing water detection device, wherein the valve seat 7 is deformed to close the water intake 21 in a watertight manner. Water pressure used in a pre-actuated sprinkler facility that opens and closes the primary side 3 and the secondary side 4 of the pipe by the control valve 1 and is introduced from a water intake 21 that opens into the pipe when the control valve 1 is open. In the flowing water detection device for detecting the flow of water in the pipe by
The control valve 1 is a butterfly valve, the intake port 21 is opened in the tube axis direction toward the valve body 2 of the butterfly valve, and a closing member 61 is freely advanced and retracted in the tube axis direction at the tip of the intake port 21. The intake port 21 can be freely opened and closed by its advancement and retraction, and the closing member 61 is urged toward the valve body 2 by a spring 61a, and the valve body 2 is moved toward the closing member 61 in the valve closing direction. A spring 61b that abuts on the end surface 2a of the valve body 2 by rotating is provided, and a spring 61b that abuts the elastic force of the spring 61a biased toward the valve body 2 side on the end surface 2a of the valve body 2 A flowing water detection device characterized in that it is set to be weaker than the elastic force.

Images