JP2015080553A - Fire hydrant device and fire hydrant valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fire hydrant device and a fire hydrant valve, enhancing seal reliability of a ball valve element by suppressing occurrence of loosening of an insert, and allowing replacement of a component unit.SOLUTION: A fire hydrant valve 20 includes: a valve body 21 disposed with a primary side inflow port 23 and a secondary side inflow port 24 on both sides of a valve chamber 22; a ball valve element 25 sandwiched by a pair of ball seats 26, 27, and stored inside the valve body 21 from the primary side inflow port 23 side; and an insert 28 produced in a cylindrical body formed with a male screw part 28a on one side of the outer circumferential face, screw-fitted in the valve body 21 from the primary side inflow port 23 side in a state that the male screw part 28a side is directed to the ball valve element 25, and pressing the ball valve element 25 sandwiched by the pair of ball seats 26, 27. The insert 28 is locked to the inner wall face of the valve body 21 by a locking screw 30 screw-fitted in a screw hoe 29 formed such that the screw hole 29 penetrates a circumferential wall of the insert 28.

Description

  The present invention relates to a fire hydrant device installed in a tunnel such as a highway, and a fire hydrant valve provided in the fire hydrant device.

  For example, in the conventional fire hydrant apparatus described in Patent Document 1, the fire hydrant door provided on the front surface of the housing is opened, the nozzle held inside the fire hydrant door is taken out, the hose is pulled out toward the fire extinguishing target, The hydrant opening / closing lever is opened to open the hydrant valve, and the pressurized water is discharged from the nozzle. The fire hydrant valve includes a valve body having a valve chamber in which a primary side inlet and a secondary side outlet are arranged, and a first side inlet and a secondary side outlet connected to each other through a ball seat in the valve body. Arranged so as to be rotatable around a second axis perpendicular to one axis, penetrates the valve hole in the direction of the first axis, and opens and closes between the primary inlet and the secondary outlet by rotation around the second axis And a ball valve body.

JP 2013-22343 A

  A conventional fire hydrant valve described in Patent Document 1 is inserted in the order of a ball seat, a ball valve body, and a ball seat into the valve body from the primary inlet side, and a valve lid (insert) is inserted into the primary side of the valve body. The valve chamber was configured by screwing into the inlet side to ensure the sealing performance of the ball valve body. Therefore, there is a problem that the valve lid is loosened due to vibration caused by the automobile traveling on the road and the like, and the sealing performance of the ball valve body is deteriorated with time.

  In order to solve such a problem, a countermeasure has been taken in which an adhesive is applied to the screwed portion between the valve lid and the valve body to bond and fix the valve lid and the valve body. However, with the measures to adhere and fix the valve lid and valve body, the valve lid cannot be removed and cannot be replaced in parts such as ball seats, and the entire fire hydrant valve must be replaced. There has been a problem of lowering.

  The present invention has been made to solve the above-described problems, and can suppress the occurrence of looseness of the insert over time, improve the sealing reliability of the ball valve body, and can be replaced in parts. It is an object of the present invention to provide a fire hydrant device and a fire hydrant valve that can improve maintenance performance.

  In the fire hydrant apparatus according to the present invention, the fire hydrant valve is sandwiched between the valve body in which the primary side inlet and the secondary side outlet are arranged on both sides of the valve chamber, and a pair of ball seats from the primary inlet side. The ball valve body housed in the valve body and a cylindrical body having a male threaded portion formed on one side of the outer peripheral surface, the primary threaded inlet facing the male threaded portion toward the ball valve body. An insert screwed into the valve body from the side and pressing the ball valve body sandwiched between the pair of ball seats, wherein a screw hole having a hole direction as a radial direction is formed on the peripheral wall of the insert. The insert is engaged with the inner wall surface of the valve body by a set screw screwed into the screw hole.

According to this invention, since the insert fastened to the valve body is locked to the inner wall surface of the valve body by the set screw screwed into the screw hole, occurrence of looseness of the insert due to vibration or the like is generated. It is suppressed and the sealing reliability of the ball valve body is enhanced.
In addition, since the set screw can be loosened and the insert can be removed, the ball seat or the like can be replaced on a component-by-part basis, and maintenance is improved.

It is a front view which shows the fire hydrant apparatus which concerns on Embodiment 1 of this invention. It is a partially broken top view which shows the state which opened the fire hydrant door of the fire hydrant apparatus which concerns on Embodiment 1 of this invention. It is a side view which shows the state which opened the fire hydrant door of the fire hydrant apparatus which concerns on Embodiment 1 of this invention. It is a side view which shows the fire hydrant valve unit in the fire hydrant apparatus which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the fire hydrant valve unit in the fire hydrant apparatus which concerns on Embodiment 1 of this invention. It is sectional drawing explaining operation | movement of the fire hydrant valve in the fire hydrant apparatus which concerns on Embodiment 1 of this invention.

  Hereinafter, preferred embodiments of a fire hydrant apparatus and a fire hydrant valve of the present invention will be described with reference to the drawings.

Embodiment 1 FIG.
1 is a front view showing a fire hydrant device according to Embodiment 1 of the present invention, FIG. 2 is a partially broken top view showing a state where the fire hydrant door of the fire hydrant device according to Embodiment 1 of the present invention is opened, and FIG. FIG. 4 is a side view showing a state where the fire hydrant door of the fire hydrant device according to Embodiment 1 of the present invention is opened, FIG. 4 is a side view showing the fire hydrant valve unit in the fire hydrant device according to Embodiment 1 of the present invention, and FIG. FIG. 6 is a cross-sectional view illustrating a fire hydrant valve unit in the fire hydrant device according to Embodiment 1 of the present invention, and FIG. 6 is a cross-sectional view illustrating the operation of the fire hydrant valve in the fire hydrant device according to Embodiment 1 of the present invention. (A) shows a closed state, (b) of FIG. 6 shows an open state.

  1 to 3, a fire hydrant device 1 is an emergency facility that is installed in, for example, a tunnel or the like and has a fire monitoring and reporting function in addition to a fire extinguishing function. And a front panel 3 that is fastened and fixed to the front surface of the housing 2 and closes the front opening of the housing 2. A fire extinguishing hose 5 having a fire extinguishing nozzle 5a at the tip and wound in an inner winding around a hose bucket 6 serving as a hose accommodating portion is accommodated in the inner central portion of the main body composed of the housing 2 and the front panel 3. Yes. A fire extinguisher 4 and various electric devices (not shown) are housed on one side in the body width direction of the housing part of the fire hose 5 in the body. A piping system 7 including a fire hydrant valve unit 8 in which the fire hydrant valve 20 and the automatic pressure regulating valve 31 are integrally formed is housed in the lower part of the other side in the body width direction of the housing part of the fire hose 5 in the body. The secondary side of the fire hydrant valve 20 is connected to the fire hose 5.

  The front panel 3 is provided with an opening 3 a facing the fire hose 5, the piping system 7, and the like and having an opening shape of a rectangle, and an opening 3 b facing the fire extinguisher 4. The fire hydrant door 9 is attached to the lower edge of the opening 3a by a hinge (not shown) having a width direction as the rotation axis direction so that the lower side of the opening 3a can be opened and closed, and opens and closes the fire hydrant valve 20. An open / close lever 10 is installed on the back surface of the fire hydrant door 9. In addition, the maintenance door 11 is attached to the upper end edge of the opening 3a by a hinge (not shown) whose width direction is the rotation axis direction so that the upper side of the opening 3a can be opened and closed.

  The electric device mounting plate 12 is fastened and fixed to the front panel 3 at the four corners, and is disposed so as to extend in the vertical direction on the opening 3a side (the other side in the width direction) of the opening 3b. A red indicator lamp 13, an emergency transmitter 14 and the like are attached to the electrical equipment mounting plate 12, and electrical equipment such as a telephone jack and an emergency outlet is provided. The red indicator lamp 13 clearly indicates the installation position of the fire hydrant apparatus 1, protrudes above the electric device mounting plate 12, and protrudes from the front surface of the front panel 3. When the emergency transmitter 14 performs a push button operation in the event of a fire accident, a fire report is made to a monitoring center (not shown). When a fire report is received from the emergency transmitter 14 at the monitoring center, a blinking signal is transmitted, and the red indicator lamp 13 that has been constantly lit is blinked.

  A fire extinguisher door 15 is attached to one side edge of the width direction of the opening 3b by a hinge (not shown) whose vertical direction is the rotation axis direction so that the opening 3b can be opened and closed.

  Next, the configuration of the fire hydrant valve unit 8 will be described with reference to FIGS. 4 to 6.

  The fire hydrant valve unit 8 is arranged on the secondary side of the fire hydrant valve 20, the automatic pressure regulating valve 31 that is disposed on the secondary side of the fire hydrant valve 20, and on the secondary side of the fire hydrant valve 20. An automatic drain valve (not shown, but the discharge port 50 to which the automatic drain valve is connected is shown in FIG. 5) that discharges non-pressurized fire-fighting water is sometimes disposed on the primary side of the hydrant valve 20 to distribute water The flange portion 17 coupled to the branch pipe (not shown) from the main pipe, the joint portion 40 to which the fire hose 5 is connected, and the operation force of the fire hydrant valve opening / closing lever 10 transmitted via the wire 16 A passive portion 18 that converts the rotational force of the drive shaft 19 is integrally formed.

  The fire hydrant valve 20 includes a valve body 21 having a valve chamber 22 in which a primary inlet 23 and a secondary outlet 24 are disposed, and a primary side flow sandwiched between ball seats 26 and 27 in the valve body 21. It is rotatably arranged around a second axis B orthogonal to the first axis A connecting the inlet 23 and the secondary outlet 24, and the valve hole 25a penetrates in a direction orthogonal to the second axis B, so that the second axis B A ball valve body 25 that opens and closes between the primary side inlet 23 and the secondary side outlet 24 by rotation around and a cylindrical body in which a male screw portion 28a is formed on one side of the outer peripheral surface is produced. 21, and an insert 28 that is screwed into an internal thread portion formed on the inner surface of the primary side inlet 23 of the 21 and ensures the sealing performance of the ball valve body 25. Further, the screw hole 29 is opposite to the other side of the male thread portion 28a of the peripheral wall (tubular body) of the insert 28, that is, the ball valve body 25 side of the peripheral wall (tubular body) of the insert 28, with the hole direction as the radial direction. It is formed through the side.

  The fire hydrant valve 20 is inserted into the valve body 21 from the primary inflow port 23 side in the order of the ball seat 26, the ball valve body 25, and the ball seat 27, with the male screw portion side facing the ball valve body 25, and the insert 28 Is assembled by screwing into a female thread portion 28a formed on the inner surface of the primary inlet 23 of the valve body 21. The insert 28 is fastened with a set fastening force, tightens a set screw 30 screwed into the screw hole 29 from the inner diameter side of the insert 28, and causes the tip of the set screw 30 to bite into the inner wall surface of the valve body 21. The valve body 21 is fixed. As a result, the ball valve element 25 sandwiched between the ball seats 26 and 27 is pressurized between the shoulder portion 24 a protruding from the inlet side of the secondary outlet 24 and the insert 28 by the fastening force of the insert 28. The ball valve body 25 is secured by being pinched.

  Then, the operating force of the fire hydrant valve opening / closing lever 10 is transmitted to the passive portion 18 via the wire 16 and converted to the rotational force of the drive shaft 19. Therefore, the drive shaft 19 is rotated, the ball valve body 25 is rotated around the second axis B, and the closed position shown in FIG. 6A (the hole direction of the valve hole 25a is orthogonal to the first axis A). And the open position shown in FIG. 6B (the hole direction of the valve hole 25a coincides with the first axis A).

The automatic pressure regulating valve 31 includes a valve body 32 and a spring case 33 that covers a lower opening of the valve body 32. A pressure regulating chamber 35 surrounded by a spool 34 is formed in the valve body 32. At the upper end and the lower end of the spool 34, a sheet 36 having an inner peripheral surface formed in a convex shape is disposed. A stem 37 having two valves 38 is disposed in the center of the spool 34. At the lower end of the stem 37, a pressure receiving disk 51 for detecting the secondary pressure is provided. The valve bodies 21 and 32 are integrally formed so that the inlet 35 a of the pressure regulating chamber 35 communicates with the secondary outlet 24 of the fire hydrant valve 20. An outlet 35 b of the pressure regulating chamber 35 is communicated with a fluid outlet 40 as a joint portion through a flow path 39. A spring 41 is disposed in the spring case 33 and presses the stem 37 upward in FIG. 5 with a set biasing force.
Therefore, in the normal state in which the fire hydrant valve 20 is closed, the automatic pressure regulating valve 31 has the upper end of the stem 37 on the inner wall surface of the valve body 31 as shown in FIG. In contact with each other, the gap between the inner peripheral surface of the seat 36 and the valve 38 is widened.

  And in the automatic pressure regulation valve 31, when the fire hydrant valve 20 is opened, the water for fire extinguishing flows into the pressure regulation chamber 35 from the inlet 35a. The fire-extinguishing water that has flowed into the pressure regulation chamber 35 passes between the inner peripheral surface of the seat 36 and the valve 38 of the stem 37 and flows in the direction of the fluid outlet 40 through the flow path 39. At this time, if the pressure in the flow path 39 is too large, the stem 37 has a large valve closing force based on the downward force generated on the pressure receiving surface of the pressure receiving disk 51, and resists the biasing force of the spring 41. It moves downward in FIG. As a result, the gap between the inner peripheral surface of the seat 36 and the valve 38 is narrowed, and the fire-extinguishing water flowing out from the pressure regulating chamber 35 is regulated and discharged from the fluid outlet 40 at the set pressure. If the pressure in the flow path 39 is too small, the stem 37 moves upward in FIG. As a result, the gap between the inner peripheral surface of the seat 36 and the valve 38 is widened, and the fire-extinguishing water flowing out from the pressure regulating chamber 35 is regulated and discharged from the fluid outlet 40 at the set pressure.

  In the fire hydrant device 1 configured as described above, when a fire occurs, the user opens the fire hydrant door 9 and opens the opening 3a. Therefore, the user pulls the fire hydrant valve opening / closing lever 10 and moves from the closed position to the open position. The turning torque of the fire hydrant valve opening / closing lever 10 is transmitted to the passive portion 18 through the wire 16 and the fire hydrant valve 20 is opened. Thereby, the water for fire extinguishing is supplied to the automatic pressure regulating valve 31 from the water distribution main (not shown) through the fire hydrant valve 20, and the water for fire extinguishing adjusted by the automatic pressure regulating valve 31 is supplied to the fire hose 5 for extinguishing the fire. Water discharge is started from the nozzle 5a. The user holds the fire-extinguishing nozzle 5a and pulls out the fire-extinguishing hose 5 toward the fire occurrence site and performs fire-extinguishing activities.

  According to the first embodiment, in the fire hydrant valve 20, the insert 28 is fastened to the primary flow path 23 side of the valve body 21 with the set fastening force, and the sealing performance of the ball valve body 25 is ensured. Thus, the set screw 30 screwed into the screw hole 29 is tightened, and the tip of the set screw 30 is bitten into the inner wall surface of the valve body 21. Therefore, since the insert 28 is locked to the inner wall surface of the valve body 21 by the set screw 30 and the rotation around the axis of the insert 28 is restricted, the insertion of the insert 28 due to vibration caused by the automobile traveling on the road or the like. Occurrence of loosening can be prevented. Thereby, the set fastening force of the insert 28 is maintained for a long period of time, and the sealing reliability of the ball valve body 25 can be enhanced. Further, since the insert 28 can be removed by loosening the set screw 30, for example, when the ball sheets 26 and 27 are worn, the ball sheets 26 and 27 can be replaced in units of parts, and the maintainability is improved. It is done.

  Here, when the insert 28 is fixed to the valve body 21 with an adhesive, it is difficult to remove the insert 28 at the time of maintenance. However, the set screw 30 is smaller than the insert 28 and has a smaller area for application of the adhesive. An adhesive may be applied to 30 and screwed into the screw hole 29, and the set screw 30 may be tightened to be locked to the inner wall surface of the valve body 21. As a result, the set screw 30 is adhesively fixed to the screw hole 29 and the loosening of the set screw 30 due to vibration can be prevented, so that the fastening force of the set screw 30 is not reduced. Therefore, since the occurrence of looseness of the insert 28 can be reliably prevented, the seal reliability of the ball valve body 25 can be ensured for a long time. When using a set screw 30 with an M3 (outer diameter of the screw portion 3 mm), if a screw loosening prevention adhesive with a breaking strength exceeding 3 N · m is used, the force to loosen the set screw 30 during maintenance Is likely to crush the hole in the head of the set screw 30, so it is desirable to use a low-strength screw loosening adhesive having a breaking strength of 3 N · m or less.

  DESCRIPTION OF SYMBOLS 1 Fire hydrant apparatus, 5 Fire hose, 5a Fire extinguishing nozzle, 20 Fire hydrant valve, 21 Valve body, 22 Valve chamber, 23 Primary side inlet, 24 Secondary side outlet, 25 Ball valve body, 26, 27 Ball seat , 28 Inserts, 29 Screw holes, 30 Set screws.

Claims (7)

In the fire hydrant device that discharges water from the hose with nozzle by opening the fire hydrant valve,
The fire hydrant valve is accommodated in the valve body from the primary inlet side by being sandwiched between a valve body having a primary inlet and a secondary outlet arranged on both sides of the valve chamber, and a pair of ball seats. The ball valve body is made into a cylindrical body having a male screw portion formed on one side of the outer peripheral surface, and the male screw portion side is directed to the ball valve body from the primary inlet port side to the valve body. An insert that is screwed and presses the ball valve body sandwiched between the pair of ball seats,
A screw hole whose radial direction is the hole direction is formed so as to penetrate the peripheral wall of the insert,
The fire hydrant apparatus, wherein the insert is locked to the inner wall surface of the valve body by a set screw screwed into the screw hole.   The fire hydrant device according to claim 1, wherein the set screw is fixed to the screw hole with an adhesive.   The fire hydrant device according to claim 2, wherein the outer diameter of the screw portion of the set screw is 3 mm or less, and the adhesive is an adhesive having a breaking strength of 3 N · m or less.   The fire hydrant device according to any one of claims 1 to 3, wherein the fire hydrant valve is formed integrally with an automatic pressure regulating valve. A valve body having a primary side inlet and a secondary side outlet arranged on both sides of the valve chamber;
A ball valve body sandwiched between a pair of ball seats and housed in the valve body from the primary inlet side;
A male threaded portion is produced in a cylindrical body formed on one side of the outer peripheral surface, and the male threaded portion side is screwed onto the valve body from the primary inflow side with the ball valve body facing, and the pair An insert for pressing the ball valve body sandwiched between the ball seats,
A screw hole whose radial direction is the hole direction is formed so as to penetrate the peripheral wall of the insert,
The fire hydrant valve, wherein the insert is locked to the inner wall surface of the valve body by a set screw screwed into the screw hole.   The fire hydrant valve according to claim 4, wherein the set screw is fixed to the screw hole with an adhesive.   6. The fire hydrant valve according to claim 5, wherein the outer diameter of the screw portion of the set screw is 3 mm or less, and the adhesive is an adhesive having a breaking strength of 3 N · m or less.

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