JP7361534B2 - relief valve device - Google Patents

Description

The present invention relates to a relief valve device that is connected in parallel to a flowing water detection device such as a sprinkler system and releases pressure increase on the secondary side to the primary side.

In conventional sprinkler fire extinguishing equipment, a water supply main is raised in the height direction of the building from a pressurized water supply device such as a fire pump, and from the water main, branch pipes are installed on each floor of the building to detect flowing water. A plurality of closed sprinkler heads are connected to the branch pipe, and the end of the branch pipe is connected to the drain pipe through an end test device.

When a fire occurs, the heat causes the sprinkler head to open and spray fire extinguishing water supplied from the pressurized water supply system to suppress the fire. When the sprinkler head opens, fire extinguishing water flows into the branch pipe, which opens the valve body of the flowing water detection device, activates the pressure switch, outputs a flowing water detection signal to the control panel, and alerts the control panel that a fire has occurred. A signal is sent to the fire receiver to output a fire alarm.

If the pressure inside the secondary piping of the flowing water detection device increases abnormally, such as during the summer, water may leak or component equipment may be damaged. For this reason, a relief valve device is installed in parallel with the water flow detection device to release the pressure increase on the secondary side to the primary side and prevent the flow from the primary side to the secondary side. This is to prevent damage etc. (Patent Document 1).

In such a relief valve device, when the operation period becomes long, foreign matter such as dirt adheres to the secondary side of the valve body that is closed for a long period of time, causing clogging, and the secondary side pressure increases. On the other hand, even if the valve body is opened, the increased pressure on the secondary side may not be able to be promptly released to the primary side.

To solve this problem, remove the relief valve device and disassemble and clean it during periodic inspections to remove foreign objects, but remove the relief valve device installed in a narrow space around the flowing water detection device. It is necessary to disassemble it, clean it, reassemble it, and put it back together, which is complicated, labor-intensive, and time-consuming.

On the other hand, the terminal test device installed at the end of the branch pipe of sprinkler fire extinguishing equipment consists of a terminal test valve and an orifice, and when the terminal test valve is opened, it produces a flow rate equivalent to the operation of one sprinkler head determined by the orifice. I'm trying to run a water test by running it through the water.

As such a terminal testing device, a ball valve with an orifice integrated therein has been proposed, and when the operating lever is turned 90 degrees in a predetermined direction, the ball valve opens and the water flows to the drain side through the orifice formed in the valve body. The amount of fire extinguishing water that is equivalent to operating one sprinkler head flows, and when the control lever is turned 90 degrees in the opposite direction, the orifice opens in the opposite direction and fire extinguishing water flows to the drain side, which removes debris that has adhered to the orifice. This makes it easy to remove foreign substances such as and clear clogging (Patent Document 2).

Japanese Patent Application Publication No. 7-265456 Japanese Patent Application Publication No. 2006-223418

By the way, similarly to the terminal testing device of Patent Document 2, it is conceivable that foreign substances such as dust can be easily removed by opening and closing the valve body using the operating lever in the relief valve device provided in parallel with the flowing water detection device.

However, the relief valve device installed in parallel with the flowing water detection device is a valve that opens and closes by moving the valve body in the axial direction against a spring against an increase in the pressure on the secondary side. Unable to apply removal structure.

In addition, the operating lever has a large movable range and space requirements when operating, so in order to place a relief valve device with an operating lever around the flowing water detection device, it is necessary to secure enough free space to allow the operating lever to be operated. Therefore, there is a problem in that the required installation space for the water flow detection device including the relief valve device becomes large.

To provide a relief valve device which enables the operation of a valve body that easily eliminates clogging by removing foreign matter while reducing the space required for operation without removing or disassembling the relief valve.

(Relief valve device for fire extinguishing equipment)
The present invention is a relief valve device that connects the secondary side to the primary side by opening a valve body to reduce the increased secondary side pressure when the secondary side pressure of a predetermined device increases,
a substantially cylindrical valve body with a primary side and a secondary side arranged in a straight line;
a cylindrical operating member disposed on the outer circumferential side of the valve body;
a clogging removal means that opens and closes a valve body to remove clogging substances by a predetermined operation of a cylindrical operating member ;
It is characterized by having the following.

(Measures for clearing blockage 1)
The means to clear the blockage is
a first conversion means for converting an axial movement of the cylindrical operating member into a movement in a direction substantially orthogonal to the axial direction ;
a second conversion means that converts the movement in the direction substantially perpendicular to the axial direction converted by the first conversion means into a movement in the direction of opening and closing the valve body;
Equipped with

(First conversion means and second conversion means)
The first conversion means is
an annular tapered groove formed on the inner circumferential surface of a cylindrical operating member disposed on the outside of the valve body so as to be freely movable in the axial direction, and having a tapered surface open on the axial center side;
a plurality of ball members arranged in the annular tapered groove;
a plurality of ball storage holes formed in the valve body and holding each of the plurality of ball members so as to be freely retractable in a direction substantially perpendicular to the axis;
The ball member is moved in and out of the ball storage hole by the movement of the annular tapered groove when the cylindrical operating member is moved in the axial direction, converting the ball member into a movement in a direction substantially perpendicular to the axis;
The second conversion means is
The valve body includes a conical member coaxially connected to the valve body, and moves in a direction substantially perpendicular to the axis of the ball member in conjunction with the protrusion and retraction of a plurality of ball members with respect to the conical outer peripheral surface of the conical member. The valve body is opened and closed by converting it into a movement in the direction of opening and closing.

(Clog clearing means 2)
The means to clear the blockage is
a third converting means for converting movement of the cylindrical operating member in the rotational direction due to rotational operation around the axis into movement in a direction substantially perpendicular to the axial direction ;
a fourth converting means that converts the movement in the direction substantially perpendicular to the axial direction converted by the third converting means into a movement in the direction of opening and closing the valve body;
Equipped with

(Third conversion means and fourth conversion means)
The third conversion means is
a plurality of annular cam grooves formed in predetermined angle units on the inner circumferential surface of a cylindrical operating member rotatably disposed around an axis on the outside of the valve body, the depth of the groove changing depending on the rotation angle;
a plurality of cam members disposed in each of the plurality of annular cam grooves;
a plurality of cam storage holes formed in the valve body and holding the cam member so as to be freely protrusive and retractable in a direction substantially perpendicular to the axis;
The cam member is moved in and out of the cam storage hole by the rotational movement of the annular cam groove when the cylindrical operating member is rotated around the axis, and is converted into a movement in a direction substantially perpendicular to the axis;
The fourth conversion means is
The valve body includes a conical member coaxially connected to the valve body, and in conjunction with the protrusion and retraction of a plurality of cam members with respect to the conical outer circumferential surface of the conical member, movement in a direction approximately perpendicular to the axis of the cam member is caused The valve body is opened and closed by converting it into a movement in the direction of opening and closing.

(basic effect)
According to the relief valve device of the present invention, the operation of the cylindrical operating member disposed outside the valve body can be performed by moving the cylindrical operating member in the axial direction along the central axis of the cylinder (slide operation) or rotating the cylindrical operating member around the axis. It can be operated without requiring a large operation space like a conventional control lever, and can be placed between the secondary and primary sides of a flowing water detection device as a designated device, for example, and connected to the piping. However, there is no need to expand the space for installing the water flow detection device including the relief valve device.

(Effect of clogging removal means 1)
Further, the clogging eliminating means 1 converts the movement of the cylindrical operating member in the axial direction into a movement in a direction substantially perpendicular to the axis, and further converts the movement in the direction of opening and closing the valve body into a movement in the direction of opening and closing the valve body. By acting on the valve, you can easily open and close the valve body to remove foreign matter such as dirt and eliminate clogging.

(Effects of first conversion means and second conversion means)
The first converting means converts the movement of the cylindrical operating member in the axial direction into a movement in a direction substantially perpendicular to the axis of the ball member, using the annular tapered groove, the ball member, and the ball storage hole; The second conversion means uses the ball member and the conical member to convert the movement of the ball member in a direction substantially perpendicular to the axis into movement in the direction of opening and closing the valve body (in this case, movement in the axial direction) and acts on the valve body. can be done. Therefore, by reciprocating the cylindrical operating member in the axial direction, it is possible to easily open and close the valve body repeatedly to remove foreign matter such as dust and eliminate clogging.

(Effect of clogging removal means 2)
Further, the clogging eliminating means converts the rotational movement of the cylindrical operating member around the axis into a movement in a direction substantially perpendicular to the axis, and further converts it into movement in the direction of opening and closing the valve body. By acting on the body, the valve body can be opened and closed to remove foreign matter such as dirt and easily clear blockages.

(Effects of third conversion means and fourth conversion means)
Further, the third conversion means converts movement in the rotational direction due to rotational operation of the cylindrical operating member around the axis into movement in a direction substantially perpendicular to the axis of the cam member using the annular cam groove, the cam member, and the cam storage hole. Furthermore, a conical member coaxially connected to the cam member and the valve body converts movement in a direction approximately perpendicular to the axis of the cam member into movement in the direction of opening and closing the valve body (in this case, movement in the axial direction). By acting on the valve body, by reciprocating the cylindrical operating member around the axis, the valve body can be repeatedly opened and closed to remove foreign matter such as dust, and clogging can be easily cleared.

Explanatory diagram showing the outline of the branch pipe system of sprinkler fire extinguishing equipment equipped with a running water detection device An explanatory diagram showing a first embodiment of the relief valve device according to the present invention in an axial longitudinal section An explanatory diagram showing a cross section taken along the a-a arrow in FIG. Explanatory diagram showing the operation of the clogging removal means provided in the relief valve device An explanatory diagram showing a state in which the valve body is opened by moving the cylindrical operating member in the axial direction in Fig. 2 An explanatory diagram showing a modification of the first embodiment in FIG. 2 in an axial cross section An explanatory diagram showing a second embodiment of the relief valve device according to the present invention in an axial longitudinal section An explanatory diagram showing a cross section taken along arrow bb in FIG. An explanatory diagram showing a cross section of the cylindrical operating member of FIG. 8 taken out. FIG. 10(A) is an explanatory view showing the structure of an initial position return means for returning the cylindrical operating member to the initial position in FIG. 7; FIG. ) shows a linearly developed longitudinal section taken along the line dd in FIG. 10(A), and FIG. 10(C) shows an operating state in which the coil spring is compressed by rotation of the cylindrical operating member. An explanatory diagram showing a state in which the valve body is opened by rotating the cylindrical operating member around the axis in Fig. 7 in an axial longitudinal section. Explanatory diagram showing a cross section taken along the line ee in FIG. 11

[Summary of sprinkler fire extinguishing equipment]
As shown in FIG. 1, in the sprinkler fire extinguishing equipment, a branch pipe 12 is connected to a main water supply pipe 11 from a pressurized water supply device such as a fire pump, for example, via a control valve 15 and a water flow detection device 10 for each floor of a building. A sprinkler head 14 is connected to the secondary side, and an end test valve 16 and an orifice 18 are connected to the end.

As is well known, in the running water detection device 10, when the sprinkler head 14 is activated to spray fire extinguishing water in the event of a fire, the pressure switch 20 is turned on and outputs a running water detection signal.

A secondary side pressure gauge 24 is connected to the flowing water detection device 10 through a gate valve 22, and a primary side pressure gauge 28 is connected through a gate valve 26. A relief valve device 30 is connected, and a drain valve 27 is connected to the primary side of the relief valve device 30.

[First embodiment of relief valve device]
(Structure of relief valve device)
As shown in FIG. 2, the relief valve device 30 of this embodiment has primary side and secondary side valve bodies 32, 34, and the secondary side port 31 and the primary side port 35 are open, respectively. There is.

A valve seat 52 is disposed inside the valve bodies 32, 34, and a spring 54 presses the valve body 46 against the valve seat 52 to normally hold it in the closed position.

The opening force determined by the secondary pressure P2 applied to the valve body 46 and its pressure receiving area is F2, the closing force determined by the primary pressure P1 applied to the valve body 46 and its pressure receiving area is F1, and the pressing force of the spring 54 is If it is F3,
F2≦(F1+F3)
At this time, the valve body 46 is in contact with the valve seat 52 and closed.

In addition, the secondary pressure P2 increases and F2>(F1+F3)
When the relationship is reached, the valve body 46 opens and lowers the increased secondary side pressure P2.

(Structure of clogging removal means)
As shown in FIGS. 2 and 3, the cylindrical operating member 36 is fitted into the outer circumferential step 55 on the lower side of the valve body 32 so as to be movable from above in the axial direction within a predetermined range (stroke). 62 to prevent it from coming off, and a spring 56 is installed inside the lower end to maintain the initial position shown.

The clogging eliminating means of this embodiment includes a first converting means that converts an axial movement of the cylindrical operating member 36 into a movement in a direction substantially perpendicular to the axis; It is comprised of a second conversion means that converts the movement in the direction substantially perpendicular to the converted axis into the movement in the direction of opening and closing the valve body 46.

The first converting means includes an annular tapered groove 38 formed on the inner circumferential surface of the cylindrical operating member 36 and having a tapered surface open toward the axis, for example four ball members 40 disposed in the annular tapered groove 38, and a valve. It is composed of a ball storage hole 50 that holds each of the ball members 40 formed in the body 32 and arranged in the annular tapered groove 38 so as to be freely retractable in a direction substantially perpendicular to the axis, and allows the cylindrical operating member 36 to reciprocate in the axial direction. The movement of the annular tapered groove 38 when the movement operation is performed causes the ball member 40 to move in and out of the ball storage hole 50 provided in the valve body 32, converting the ball member 40 into movement in a direction substantially perpendicular to the axis.

The second conversion means includes a conical member 42 connected to a valve body 46 via a valve shaft 48, the conical member 42 having a conical outer peripheral surface 44, and forming a plurality of communication holes 43 in the axial direction. , is integrated with the valve body 46 so as to be freely movable in the axial direction. At the initial position shown in FIG. 2, the ball member 40 is in contact with the conical outer circumferential surface 44 of the conical member 42 so as to surround the circumference, and the movement of the ball member 40 to appear and retract as converted by the first converting means That is, the valve body 46 is opened and closed by converting the movement of the ball member 40 in a direction substantially perpendicular to the axis, that is, the axial direction, into a direction that opens and closes the valve body 46, that is, a movement in the axial direction.

That is, as the ball member 40 moves in and out of the annular tapered groove 38, the valve body 46 moves in the opening/closing direction due to the movement of the ball member 40 repeatedly coming into contact (pressing) and not contacting the conical outer peripheral surface 44. , thereby opening and closing the valve body 46.

(Operating function of clogging removal means)
As shown in FIG. 4, the amount of movement in the axial direction when the cylindrical operating member 36 is axially moved to a position where it becomes the cylindrical operating member 36' indicated by the dotted line is defined as L1. As a result, the annular tapered groove 38 also moves, and the ball member 40 stored in the ball storage hole 50 moves toward the axis and moves to the position of the ball member 40' shown by the dotted line, which is substantially perpendicular to the axis 45 at this time. Let L2 be the amount of movement in the direction.

When the ball member 40 moves to the position of the ball member 40', the conical member 42 moves in the axial direction due to the contact (pressure) of the ball member 40 against the conical outer peripheral surface 44, and as shown in FIG. The valve body 46 connected at 48 is moved in the opening direction, and the amount of axial movement of the conical member 42 at this time is defined as L3.

Here, if the taper angle of the upper tapered surface of the annular tapered groove 38 with respect to the axial direction is θ1, then the distance between the movement amount L1 of the cylindrical operating member 36 and the movement amount L2 of the ball member 40 is L2/L1=tanθ1.
There is a relationship between

Further, if the taper angle of the conical outer circumferential surface 44 of the conical member 42 is θ2, then the distance between the movement amount L2 of the ball member 40 and the movement amount L3 of the conical member 42 is L2/L3=tanθ2.
There is a relationship between

Therefore, between the amount of movement L1 caused by the movement operation of the cylindrical operating member 36 and the amount of movement L3 of the conical member 42, that is, the amount of movement L3 of the valve body 46 toward the open side, there is a difference L3=(tanθ1/tanθ2)・L1 =K・L1
There is a relationship between

Here, (tan θ1/tan θ2) is a predetermined constant K, which becomes 1 or more by setting θ1>θ2, and as a result, the axial movement amount of the cylindrical operating member 36 is expanded K times and the valve body 46 can be moved to the open side.

Further, the wall thickness of the cylindrical operating member 36 can be made to be approximately the same as the wall thickness of the valve bodies 32 and 34, for example, and the outer diameter of the cylindrical operating member 36 can be made relatively small. It can be operated in a smaller space compared to the space required for operation. Furthermore, compared to the case where a lever is used as the operating member, the possibility of accidentally colliding with an object and damaging the operating member is reduced.

(Clog clearing operation)
During periodic inspection of sprinkler fire extinguishing equipment, etc., with the gate valve 26 shown in FIG. 1 closed and the drain valve 27 opened, the cylindrical operating member 36 of the relief valve device 30 is moved by the arrow as shown in FIG. As shown in A, a movement operation is performed to reciprocate in the axial direction.

By this operation, the valve body 46 is opened and closed via the annular tapered groove 38, the ball member 40, and the conical member 42, and when the valve body 46 is opened, fire extinguishing water flows from the secondary side to the primary side, and the valve body 46 is opened and closed. Eliminate blockages by discharging foreign matter such as dust that has adhered to the secondary side of the

[Modification of the first embodiment]
As shown in FIG. 6, in the relief valve device 30 of this embodiment, a valve seat 52a is arranged at the internal opening end of the secondary side port 31a of the secondary side valve body 32a, and the valve body 46a is held by a spring 54a. It is pressed against the valve seat 52a and is normally held in the closed position.

A cylindrical operating member 36a is fitted on the outside of the outer periphery of the primary side valve body 34a so as to be movable in the axial direction within a predetermined range (stroke), and is prevented from coming off on the inside of the upper end with a stop ring 62, and with a stepped inside of the lower end. A spring 56 is installed in the section to maintain the initial position shown. Since the specific configuration of the clogging eliminating means of this embodiment is the same as that of the embodiment of FIG. 2, the same reference numerals are given and the description thereof will be omitted.

In this embodiment as well, when the cylindrical operating member 36 is moved back and forth, the valve body 46a is opened and closed via the annular tapered groove 38, the ball member 40, and the conical member 42, and when the valve body 46a is opened. Fire extinguishing water flows from the secondary side to the primary side to discharge foreign matter such as dust adhering to the secondary side of the valve body 46a and eliminate the blockage.

[Second embodiment of relief valve device]
(Structure of clogging removal means)
As shown in FIGS. 7 and 8, the relief valve device 30 of this embodiment opens and closes the valve body 46 by rotating a cylindrical operating member 36 disposed outside the outer periphery of the valve body 32 to reciprocate around the axis. The device is characterized by being provided with a clogging eliminating means for discharging foreign matter such as dust to eliminate clogging.

The cylindrical operating member 36 is fitted in the upper part of the flange 74 on the lower side of the outer periphery of the valve body 32 in the axial direction, and is prevented from coming off by the engagement of the retaining ring 62 on the inner side of the upper end, so that the cylindrical operating member 36 can freely rotate to the outside of the valve body 32. Placed. Further, the cylindrical operating member 36 is held at the initial position shown in the figure by an initial position return means, which will be described later.

The clogging eliminating means of the present embodiment includes a third converting means that converts the movement of the cylindrical operating member 36 in the rotational direction due to the rotational operation around the axis into a movement in a direction substantially perpendicular to the axis; It is constituted by a fourth converting means that converts a movement in a direction substantially perpendicular to the converted axis into a movement in a direction to open and close the valve body 46.

The third converting means is provided with an annular cam groove 70 that is formed at predetermined angular units at four locations on the inner circumferential surface of the cylindrical operating member 36, and the depth of the annular cam groove 70 is as shown in FIG. The cam groove has a shape that is deepest at the initial position and becomes shallower as the rotation angle changes. A ball member 40 functioning as a cam member is disposed in the annular cam groove 70, and the ball member 40 is retractably housed in a ball housing hole 50 provided in the valve body 32 that functions as a cam housing hole.

Thereby, the third conversion means causes the ball member 40 to protrude and retract from the ball storage hole 50 by the movement of the annular cam groove 70 in the rotational direction accompanying the rotational operation of reciprocating the cylindrical operating member 36 around the axis, so that the ball member 40 is moved approximately perpendicularly to the axis. Convert it into a movement in the direction you want to move.

The fourth conversion means includes a conical member 42 coaxially connected to the valve body 46 via a valve shaft 48, the conical member 42 having a conical outer peripheral surface 44, and a plurality of communicating holes in the axial direction. 43, and is incorporated integrally with the valve body 46 so as to be freely movable in the axial direction.

The ball member 40 is in contact with the conical outer circumferential surface 44 of the conical member 42 in an initial position so as to surround it, and as in the first embodiment, the ball member 40 is moved in and out of the conical outer circumferential surface 44 in conjunction with the movement of the ball member 40 into and out of the conical outer circumferential surface 44. The valve body 46 is opened and closed by converting the movement of the ball member 40 in a direction substantially perpendicular to the axis into a movement in the direction of opening and closing the valve body 46 .

(Means for returning the cylindrical operating member to its initial position)
As shown in FIG. 10A, balls 76 are fitted into ball grooves 77 formed at 120° intervals in the flange 74 of the valve body 32 shown in FIG. The lower end surface 36b of the cylindrical operating member 36 is rotatably supported within a predetermined angular range about the shaft 45 with low friction by point contact of balls 76 arranged at three locations on the collar surface 74a.

Further, spring storage grooves 78 are formed at three locations on the collar surface 74a between the positions where the balls 76 are disposed in the circumferential direction, and a coil spring 80 is incorporated therein. As shown in FIG. 10(B), the tip of a pin 82 fixed upright on the lower end surface 36b of the cylindrical operating member 36 is inserted into the spring storage groove 78, and is in contact with one end of the coil spring 80. .

As shown in FIG. 10(C), when the operator rotates the cylindrical operating member 36 in the direction of arrow C, the coil spring 80 is compressed by the movement of the pin 82, and the cylindrical operating member 36 is restored to its initial position. When a force is generated and the operator releases his/her hand, the cylindrical operating member 36 is pushed by the coil spring 80 and returned to its initial position.

Note that the initial position return means in FIG. 10 is not limited to this, and includes any suitable structure as long as it generates a restoring force in the direction of returning to the initial position as the cylindrical operating member 36 is rotated. Further, the means for returning the cylindrical operating member 36 to its initial position is not essential; for example, a structure for positioning the cylindrical operating member 36 between an initial position (valve body closed position) and a rotational position (valve body open position) is provided, The valve body 46 may be opened and closed by performing a rotation operation in which the shaped operation member 36 is reciprocated.

(Clog clearing operation)
In the initial state of the cylindrical operating member 36 shown in FIGS. 7 and 8, the ball member 40 is at the deepest initial position of the annular cam groove 70, and the valve body 46 is pressed against the valve seat 52 by the spring 54. , is in a closed state.

In this state, when a rotational operation is performed to reciprocate the cylindrical operating member 36 around the axis as shown by arrow B in FIG. 11, the conical member 42 moves in a direction substantially perpendicular to the axis of the ball member 40, as shown in FIG. This movement is converted into a movement in the direction of opening and closing the valve body 46, thereby causing the valve body 46 to open and close.

During periodic inspections, etc., the gate valve 26 shown in Fig. 1 is closed and the drain valve 27 is opened, so when the valve body 46 is opened, fire extinguishing water flows from the secondary side to the primary side, and the valve body Remove foreign matter such as dust adhering to the secondary side of 46 to clear the blockage.

In this embodiment, the ball member 40 is used as the cam member, but the present invention is not limited to this, and includes cam members having an appropriate shape.

[Modification of the present invention]
(Flowing water detection device)
The above embodiment takes as an example a relief valve device installed in a flowing water detection device of sprinkler fire extinguishing equipment, but is not limited to this, and may be a relief valve device installed in a flowing water detection device of foam fire extinguishing equipment, and further, This applies to relief valve devices installed in appropriate equipment installed in aqueous medium supply systems.

(others)
Further, the present invention includes appropriate modifications without impairing its objects and advantages, and is not limited by the numerical values shown in the above embodiments.

10: Flowing water detection device 12: Branch pipe 14: Sprinkler heads 22, 26: Gate valve 27: Drain valve 30: Relief valve device 32, 32a, 34, 34a: Valve body 36, 36a: Cylindrical operating member 38: Annular taper Groove 40: Ball member 42: Conical member 44: Conical outer peripheral surface 46, 46a: Valve body 50: Ball storage hole 52, 52a: Valve seat seat 70: Annular cam groove

Claims (5)

A relief valve device that connects the secondary side to the primary side by opening a valve body to reduce the increased secondary side pressure when the secondary side pressure of a predetermined device increases,
a substantially cylindrical valve body in which the primary side and the secondary side are arranged linearly;
a cylindrical operating member disposed on the outer peripheral side of the valve body;
clogging removal means for opening and closing the valve body to remove clogging substances by a predetermined operation of the cylindrical operating member ;
A relief valve device comprising:
In the relief valve device according to claim 1,
The clogging removal means is
a first converting means for converting the axial movement of the cylindrical operating member into a movement in a direction substantially orthogonal to the axial direction ;
a second converting means that converts the movement in a direction substantially perpendicular to the axial direction converted by the first converting means into a movement in the direction of opening and closing the valve body;
A relief valve device comprising:
In the relief valve device according to claim 2,
The first conversion means includes:
an annular tapered groove formed on the inner circumferential surface of the cylindrical operating member disposed outside the valve body so as to be movable in the axial direction, and having a tapered surface open toward the axial center;
a plurality of ball members arranged in the annular tapered groove;
a plurality of ball storage holes formed in the valve body and holding each of the plurality of ball members so as to be freely retractable in a direction substantially perpendicular to the axis;
The movement of the annular tapered groove when the cylindrical operating member is moved in the axial direction causes the ball member to move in and out of the ball storage hole, converting the ball member into a movement in a direction substantially perpendicular to the axis;
The second conversion means:
a conical member coaxially connected to the valve body, and movement of the ball member in a direction substantially perpendicular to the axis in conjunction with the protrusion and retraction of the plurality of ball members with respect to the conical outer circumferential surface of the conical member; converting the motion into a movement in the direction of opening and closing the valve body to open and close the valve body,
A relief valve device characterized by:
In the relief valve device according to claim 1,
The clogging removal means is
a third converting means for converting a movement of the cylindrical operating member in a rotational direction due to a rotational operation around the axis into a movement in a direction substantially perpendicular to the axial direction ;
a fourth converting means for converting the movement in a direction substantially orthogonal to the axial direction converted by the third converting means into a movement in a direction for opening and closing the valve body;
A relief valve device comprising:
In the relief valve device according to claim 4,
The third conversion means is
a plurality of annular cam grooves formed in predetermined angular units on the inner circumferential surface of the cylindrical operating member disposed on the outside of the valve body so as to be rotatable around the axis, the depth of the groove changing depending on the rotation angle; and,
a plurality of cam members disposed in each of the plurality of annular cam grooves;
a plurality of cam storage holes formed in the valve body and holding the cam member so as to be freely protrusive and retractable in a direction substantially perpendicular to the axis;
The movement of the annular cam groove in the rotational direction when the cylindrical operating member is rotated about the axis causes the cam member to move in and out of the cam storage hole in a direction substantially perpendicular to the axis. Convert to
The fourth conversion means is
a conical member coaxially connected to the valve body, and movement of the cam member in a direction substantially perpendicular to the axis in conjunction with the protrusion and retraction of the plurality of cam members with respect to the conical outer circumferential surface of the conical member; A relief valve device characterized in that the valve body is opened and closed by converting the movement into a movement in the direction of opening and closing the valve body.

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