JP2001280529A - Valve device having residual pressure release function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a valve device having a residual pressure release function exhausting after certainly stopping supply of compressed air in an opening/closing transition period. SOLUTION: In this valve device, a valve casing 2 is disposed with an auxiliary valve element 36 opening and closing an exhaust port 31 open on an outlet 4 side, such that the auxiliary valve element 36 can move inwardly and outwardly, while the auxiliary valve element 36 is energized outwardly by a spring 55. The lower face of an operation handle 20 opening and closing a valve element 15 restrains an end part of the auxiliary valve element 36 in a position except a valve closing position, such that the auxiliary valve element 36 cannot retreat outwardly, to retain the auxiliary valve element 36 to a closing position of the exhaust port 31. In the valve closing position, the restraint by the lower face is released to retreat the auxiliary valve element 36 outward by the energizing force of the spring 55 and to release the exhaust port 31 at the outward retreat position. Thereby, the auxiliary valve element 36 is retained by the restraint of the operation handle 20 not to be movable and to allow closing of the exhaust port 31 from a valve opening position to the valve closing position, so that the compressed air on the primary side does not leak outward from the exhaust port 31, in the process from the valve opening position to the valve closing position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air drive device using compressed air as an operation source, and a valve device having a residual pressure release function interposed in a pipe between the air source and the air source.

[0002]

2. Description of the Related Art A valve device such as a ball valve device is used to control the conduction of compressed air to an air-driven device. On the other hand, even when the ball valve device is switched to the valve closing position and the communication with the pressurized air is cut off when the operation of the air-driven device is stopped or during maintenance work, residual pressure exists on the side of the air-driven device. Then, the air-driven device may be operated by an unlocking operation, a disassembly operation, or the like of the air-driven device, which may cause a malfunction or an accident. Therefore, usually, a separate discharge valve is provided between the ball valve device and the air-driven device, and when the operation is stopped, the internal pressure of the air-driven device is made equal to the outside air by operating the discharge valve after switching the valve closing position of the ball valve device. Like that. By the way, if the discharge valve is separately provided, the number of parts is increased, and the valve closing operation is separately required, which is troublesome. Further, it is easy to forget to operate the discharge valve, and the safety management is sufficiently reliable. Not.

[0003] Therefore, as disclosed in Japanese Utility Model Laid-Open No. 5-71550, a ball valve device having an air venting function has been proposed. This device converts a ball-shaped valve element disposed in a valve chamber in a valve housing into a valve opening position and a valve closing position by an operation handle, and provides an air vent passage in the valve housing. In the ball-shaped valve body, a residual pressure passage connecting the outlet (secondary side) and the air vent passage is formed separately from the communication hole communicating the inlet (primary side) and the outlet (secondary side). This is related to the configuration described above. This has the advantage that the opening and closing of the pressurized fluid line and the discharge of the residual pressure can be performed in one operation by one valve.

[0004]

In the ball valve device having the above-mentioned residual pressure releasing function, the valve position is changed between a valve opening position and a valve closing position in accordance with the rotation of the operating handle. However, between the two positions, there is an angular region where both the communication hole of the ball-shaped valve element and the residual pressure passage communicate with the outlet (secondary side) at the same time. That is, the diameter of the communication hole of the ball valve is a large diameter that is substantially equal to the diameter of the inflow port and the outflow port in order to avoid pressure loss, and therefore, the operation angle of 90 ° between the valve opening position and the valve closing position. At an angle of about 60 ° or more, the communication state between the inflow port and the outflow port by the communication hole is maintained, and it is inevitable that the communication hole and the residual pressure passage communicate with each other through the outflow port. It is.

[0005] Therefore, during the valve closing operation, the compressed air on the primary side flows into the residual pressure passage through the communication hole and flows out from the air vent passage. It is conceivable that the outflow of the compressed air is mistakenly considered as the one in which the residual pressure has been released, and the compressed air is left as it is. In this state, the air pressure on the primary side is applied to the secondary side through the communication hole and is maintained, and the high pressure is applied to the secondary side. When the lock is released, the device operates due to the residual pressure, and there is a concern that a malfunction and a disaster due to the malfunction may occur. Further, the compressed air on the primary side leaks from the air vent passage, and the air is wasted.

An object of the present invention is to provide a valve device having a residual pressure release function free of such problems.

[0007]

According to the present invention, there is provided a valve housing having a valve chamber between an inlet and an outlet, a valve housing disposed in the valve chamber, and having an inlet and an outlet at an open position. And a valve body that shuts off the inflow port and the outflow port at the valve closing position, and is disposed outside the valve housing, and opens and closes the valve body by a rotation operation. In the valve device provided with an operation handle for converting into an exhaust port, an exhaust port opened to the outflow port side and an operating hole communicating with the exhaust port are connected to the valve housing, and the exhaust port is opened and closed by the operating hole. The auxiliary valve body is disposed so as to be movable inward and outward, and the auxiliary valve body is urged outward by a spring, and the operating handle is set at the lower surface of the auxiliary valve body at a position other than the valve closing position. The auxiliary valve body is held at a position where the exhaust port is closed. In the closed position, the restraint by the lower surface is restricted. Dividing by the auxiliary valve body by the biasing force of the power spring is outwardly retracted, this outward retracted position, a valve device having a residual pressure release function, characterized in that so as to open the exhaust port.

In this configuration, when the operating handle is in the valve open position, the inflow port and the outflow port communicate with each other, and compressed air is supplied from the air source to an air drive device using compressed air as an operation source. . In this state, the auxiliary valve body is restrained by the operation handle so as not to move outward and the exhaust port is kept closed, so that air does not escape from the air outlet.

When the communication with the air source is released when the air drive device is stopped or the like, the operation handle is set to the valve closing position. Thereby, the inflow port and the outflow port are shut off by the valve element, and the upper end of the auxiliary valve element is inserted into the opening hole by the urging force of the spring, the auxiliary valve element retreats outward, and the exhaust port Is released to the air vent position. Therefore, the compressed air in the outlet side (secondary side) pipe flows out from the exhaust port, and the residual pressure is eliminated.

On the other hand, from the valve opening position to the valve closing position, the auxiliary valve body is immovably held by the restraint of the operation handle, and the exhaust port is kept closed. That is, the exhaust port and the air outlet communicate with each other after the inlet and the outlet are completely shut off by the valve body. Therefore, in the process from the valve opening position to the valve closing position, the supply of air is reliably stopped and then the exhaust is performed, so that the compressed air on the primary side does not leak to the outside from the exhaust port.

Here, an arc-shaped guide groove centered on the pivot point is formed in the operation handle, and the end thereof has
An open hole having a diameter larger than the groove width is connected, and an insert portion having a diameter that can be inserted into the open hole is formed at the upper end of the auxiliary valve body, and can be inserted into the guide groove on the insert portion. The operating handle is coupled to the operating handle through a flexible neck, and at the position except for the valve closing position, the neck is inserted into the guide groove, and the upper end of the insertion portion of the auxiliary valve body is guided by the guide groove. The auxiliary valve body is held at a position that closes the exhaust port by restraining the exhaust port from being evacuated outward at the lower surface of the peripheral edge of the road. A configuration is proposed in which the restraint is released to release the auxiliary valve body outward by the urging force of the spring to open the exhaust port and restrain the rotation of the operation handle.

In this configuration, at the valve closing position, the insertion portion of the auxiliary valve body can be inserted into an open hole formed in the operation handle, and at other positions, the neck portion is inserted into the guide groove, The protrusion of the auxiliary valve body is restrained. In this configuration,
In order to move the operation handle from the valve-closed position to the valve-opened position, the operation head is pushed in with a finger, and its neck is aligned with the guide groove, and then the operation handle is turned. For this reason, unlocking by pressing the operation head and rotation of the operation handle are required, resulting in two actions. The valve opening operation can be confirmed, and the operation handle is rotated from the valve closing position by an inadvertent erroneous operation. do it,
The valve body is switched from the exhaust state to the air supply state, and it is possible to prevent a disaster or the like from occurring due to malfunction of the air drive device. In addition, in such a configuration, since the operation head of the auxiliary valve body projects from the upper surface of the operation handle, the pressing operation is facilitated.

[0013] Further, an exhaust port opening to the outlet side flow path, an operating hole having one end communicating with the exhaust port and the other end opening outward, and a plurality of operating holes communicating with the operating hole are provided in the valve housing. Forming an air outlet hole, and communicating the air outlet hole with the exhaust port through the operation hole at an outward retreat position of the auxiliary valve body attached to the operation hole,
It is possible to adopt a configuration in which the residual pressure is removed from the plurality of air outlets. In this configuration, the residual pressure from the exhaust port is dispersed and injected from the plurality of air outlets, but at this time, the working hole behind the air outlet acts as a resonator, Similar to the operation of a so-called perforated tube type silencer, a silencing effect is produced.

The valve element need not necessarily be a ball-type valve element. However, by using a ball-shaped valve body having a communication hole, the inflow port and the outflow port can be communicated without pressure loss. That is, the valve body is a ball-shaped valve body having a communication hole formed therein, and the ball-shaped valve body is pivotally supported by an operation handle, so that the inflow port and the outflow port communicate with each other through the communication hole by the rotation operation. A configuration has been proposed in which conversion control is performed between a valve opening position and a valve closing position that shuts off the inflow port and the outflow port.

[0015]

1 to 6 show a ball valve device 1 according to one embodiment of the present invention. This ball valve device 1
Is a valve housing 2 provided with a valve chamber 5 between an inlet 3 and an outlet 4, a valve body 15 disposed in the valve chamber 5, and a residual pressure release part according to a main part of the present invention. 30.

Here, in the valve housing 2, a male screw ring 9a having an inflow port 3 inside is screwed to an end of a pipe section 6 in which the valve chamber 5 and the outflow port 4 are disposed in a penetrating manner. Further, a valve holding portion 7 is coupled to a side portion of the pipe portion 6, and female screws 8 a and 8 b are formed on the inner peripheral surfaces of the inflow port 3 and the outflow port 4.

A packing 11 made of synthetic resin is fitted to the valve seat of the valve chamber 5, and a ball-shaped valve body 15 fitted in the valve chamber 5 is rotatably supported on the inner peripheral spherical surface thereof. ing.

The valve body 15 has a communication hole 16 having the same inner diameter as the inflow port 3 and the outflow port 4. Further, the valve element 15 is connected in a rotational direction to a lower end of a shaft rod 17 inserted into a shaft hole 18 vertically penetrating the valve holding section 7. It is screw-fixed by a handle 20 and a nut 21. As a result, the valve element 15 is pivotally supported by the end of the operation handle 20, and when the operation handle 20 is rotated, the valve element 15 is rotated, and the communication hole 16 is connected to the inflow port 3 and the outflow port 4 by means described later. Due to the communicating valve opening position and its 90 ° rotation, the inlet 3, outlet 4
Is converted to a valve-closing position at which the valve is closed.

Next, the configuration of the residual pressure release section 30 will be described. An exhaust port 31 is formed on the peripheral wall of the outlet 4. The exhaust port 31 is connected to a lower end of an operating hole 32 formed through the valve holding portion 7 through a tapered end port 33, and is opened and closed by an auxiliary valve body 36 mounted in the operating hole 32. You. The operating hole 32 communicates with a plurality of vertically formed air outlets 35 (see FIG. 3) at the front edge of the valve holding portion 7.

The auxiliary valve element 36 has a mounting hole 3 opening downward.
8 comprises an elevating valve 37 formed therein and an elastic contact valve 40 provided in the mounting hole 38. More specifically, a locking ring 43 is provided on the inner periphery of the lower end opening of the mounting hole 38.
Is fitted on the elastic valve 40 in the elevating valve 37, and the elastic contact valve 40 is urged downward by the elastic member 44. At the lower end of the elastic contact valve 40, an engaging step 41 is formed which can abut on the locking ring 43. Further, an O-ring 34 is fitted to the lower end of the elastic valve 40.
Thus, the auxiliary valve element 36 is moved by the urging force of the ridge 44 between the position where the O-ring 34 is pressed against the tapered end 33 to block the exhaust port 31 (see FIGS. 1 and 4) and the position where the elevating valve 37 rises. The locking ring 4 is urged by the spring 44.
3 is engaged with the engagement step 41, and is converted to the outward retreat position (see FIG. 6) which rises integrally.

Further, the elevating valve 37 includes a narrow rod portion 49 that forms a gap 48 with the inner surface of the operating hole 32, a sliding portion 46 slidably fitted to the operating hole 32, An insertion portion 50 having a diameter smaller than 46, and a neck 5 having a diameter smaller than the insertion portion 50.
1 and an operation head 52 having substantially the same diameter as the insertion portion 50 are sequentially coupled in the vertical direction. The elevating valve 37 has a spline 55 disposed in the gap 48 and is inserted into the operating hole 32 together with the elastic valve 40.

On the other hand, the operation handle 20 extends on the auxiliary valve element 36, and is a virtual arc centered on the axis (rotation fulcrum) of the shaft 17 and passing on the auxiliary valve element 36. An arcuate guide channel 22 is formed along the line. An open hole 23 is formed at an end of the guide groove 22. The fan angle from the center of the opening 23 to the other end of the guide groove 22 is approximately 90 °. The width of the guide channel 22 is larger than the diameter of the neck 51 (about 1 mm), and
Is larger (about 0.5 mm) than the diameter of the insertion section 50 and the operation head 52. When the operation handle 20 is rotated about the shaft 17, the valve body 15 rotates, and the inlet 3 and the outlet 4 are closed at a position where the opening 23 coincides with the operation head 52. Valve position. The communication hole 1 is located at a position where the other end of the guide channel 22 coincides with the operation head 52.
6 is a valve opening position communicating with the inflow port 3 and the outflow port 4.
The exact stop position of the operating handle 20 is set such that the notch end faces 20a, 20b of the handle abut against the end faces 7a, 7b of the stopper provided on the valve holding part 7, so that the rotation angle becomes 90 °. Stipulated.

When the opening 23 is located at the valve closing position that coincides with the operation head 52, the opening 23 is larger than the diameter of the insertion portion 50. , Into the opening 23. This insertion position is defined by the upper end of the sliding portion 46 abutting the lower surface around the opening 23. In this state, the sliding portion 46 moves outward along the operation hole 32, the gap 48 covers the entire air outlet hole 35, and the locking ring 43 elastically contacts with the lift valve 37. By engaging with the engaging step 41 of the valve 40, the resilient valve 40 also moves outward integrally, whereby the O
A gap is formed between the ring 34 and the tapered end port 33, the exhaust port 31 is opened, and the exhaust port 31 and the air outlet 35 communicate with each other via the gap 48. That is, the outlet 4 is in a state of communicating with the outside air.

When the operating handle 20 does not coincide with the opening 23 and the operating head 52, the neck 51 is inserted into the guide channel 22, and the upper surface of the insertion portion 50 is positioned on both sides of the lower surface of the guide channel 22. The urging force of the ridge 55 keeps it pressed. In this state, the auxiliary valve element 36 is shown in FIGS.
In this position, the O-ring 34 of the elastic contact valve 40 is pressed against the end port 33 by the urging force of the ridge 44, and the exhaust port 31 is shut off.

Next, the operation of the above configuration will be described.
In the above-described ball valve device 1, the female screw 8a of the inflow port 3
Is connected to a conduit communicating with the compressed air source, and the outlet 4
The female screw 8b is connected to a pipeline communicating with the air drive device. Then, in order to supply compressed air to the air-driven device, the operation handle 20 is set to the valve-open position as shown in FIGS. A position that matches the heart. In this position, the communication hole 16 of the valve body 15 is in a position to communicate the inflow port 3 and the outflow port 4, and the compressed air flows to the air driving device, so that the air driving device can be operated.

In the case where the operation of the air drive device is stopped and the communication with the compressed air source is cut off, the operation handle 20 is rotated in the reverse direction so that the opening hole 23 and the elevating valve 37 coincide. The position shown in FIG. At this point,
The insertion portion 50 engaged with the lower surface of the guide groove 22 is released from the restraint, and the urging force of the spline 55 causes the sliding portion 46 to be engaged.
Is raised (retracted outward) until the upper end of the opening comes into contact with the periphery of the lower surface of the opening 23, and the insertion portion 50 is inserted into the opening 23 (see FIG. 6). Then, with the elevation of the elevating valve 37, the resilient valve 40 in which the locking ring 43 is engaged with the engagement step 41 is also elevated, and as described above, the exhaust port 31 is opened, and the exhaust port 3 is opened.
1 communicates with the air outlet 35. Further, in this state, the valve body 15 rotates 90 ° due to the rotation of the shaft rod 17, and the inflow port 3 and the outflow port 4 are shut off.
At the same time when the valve is closed, the exhaust port 31 is opened, and the residual pressure in the pipe on the side of the air-driven device is released from the air outlet 35. Here, outlet 4
Is determined by the spring constant of the spring 44.
That is, the sum of the atmospheric pressure and the spring pressure of the spring 44 and the outlet 4
When the pressure in the side pipe line becomes substantially equilibrium, the exhaust port 31 is blocked by the elastic valve 40. Therefore, by appropriately selecting the spring constant of the ridge 44,
The maximum hermetic pressure of the outlet 4 can be chosen at will.

By the way, during the period from the valve opening position to the valve closing position, the neck 51 slides on the guide groove 22 and the insertion portion 50 is maintained in a state of being restrained by the lower surface of the guide groove 22. The auxiliary valve body 36 is maintained in the state shown in FIG. 4, and the elastic contact valve 40 is held at a position where the O-ring 34 is pressed against the tapered end port 33 by the ridge 44 to shield the exhaust port 31. Therefore, while the operation handle 20 is being rotated, the communication hole 16 is rotated to rotate about 6 ° during the operation angle of 90 °.
In the angle range of about 0 °, the inflow port 3 and the outflow port 4 are in communication with each other through the communication hole 16. Is retracted outward, and the exhaust port 31 is opened. During that time, the closed state is maintained, so that the compressed air from the inflow port 3 is discharged to the air outlet 35 during the rotation of the operation handle 20. It will not be done.

When the communication with the compressed air is to be resumed from the valve-closed state, the operation head 52 is pushed in with a finger so that the guide groove 22 and the neck 51 are aligned. Rotate. That is, in the valve closing position, the insertion handle 50 is inserted into the opening hole 23 and the operation handle 20 is immovable, and the operation of the operation handle 20 is enabled only by pushing the operation head 52. For this reason,
The valve closing position is locked, and in order to open the valve, two actions of pressing the operation head 52 and rotating the operation handle 20 are required. An operation error such as opening the operation handle 20 is avoided. In addition, in this configuration, since the operation head 52 of the auxiliary valve body 36 protrudes from the upper surface of the operation handle 20, this pressing operation becomes easy.

In the above embodiment, a plurality of air outlets 35 communicating with the working holes 32 are formed. Here, four holes are formed with the diameter of the exhaust port 31 being φ4 and the diameter of the air blowing hole 35 being φ2. For this reason, the residual pressure from the exhaust port is dispersed and injected from the plurality of air outlets. At this time, the working hole 32 behind the air outlet acts as a resonance interference cylinder. Similar to the operation of the silencer, a silencing effect is produced.

FIG. 7 shows an embodiment according to a configuration in which a silencer 60 is disposed in the air outlet 35 in order to prevent noise caused by such exhaust. In this case, the air outlet 3
Reference numeral 5 denotes a single large-diameter air supply hole, which may be connected to the silencer 60.
Depending on the performance of the device, an optional silencing effect can be produced.

In the configuration of the above-described embodiment, the O-ring 34 is fitted to the lower end of the resilient valve 40 and the end port 33 is tapered, but as shown in FIG. A tapered surface 61 is formed at the lower end of the
4 may be formed.

In the above-described structure, the engaging step 41 of the elastic contact valve 40 is engaged by the locking ring 43 so that the elevating valve 37 and the elastic contact valve 40 can be integrally raised and lowered. As shown in FIG. 9, a locking projection 63 may be formed at the lower end of the elevating valve 37 instead of the locking ring 43.

Further, the above-described structure is similar to that of the operation handle 20 shown in FIG.
A guide channel 22 and an opening 23 are formed in the guide channel 22.
The auxiliary valve body 36 is restrained by the opening hole 23, and the auxiliary valve body 36 is released by the opening hole 23.
As shown by the arrow, the upper end of the auxiliary valve element 36 may be supported by the lower surface of the operation handle 20 without forming the guide groove 22 so that the auxiliary valve element 36 cannot be retracted outward. In this case,
In the configuration shown in FIG. 6, the neck 51 and the operation head 52 may be removed, and the upper end of the insertion section 50 (this surface is the operation surface) may be brought into contact with the lower surface of the operation handle 20. Further, as shown in FIG. 10, when the opening 23 is removed and the operation handle 20 is set to the closed position, the operation handle 20 is retracted sideways from above the auxiliary valve body 36, whereby the auxiliary valve body 36 is restrained. You may make it cancel. In this configuration,
Since there is nothing obstructing the pressing operation of the insertion portion 50, even if the operation head 52 is omitted, the operation handle 20 can be moved onto the insertion portion 50 while pressing the insertion portion 50 with a finger. Thus, the operation head 52 can be omitted.

Further, as shown in FIG.
0, an inclined pressing guide 65 is formed on the upper surface of the auxiliary valve element 3 by the rotation of the operation handle 20.
6 may be pushed down to shield the exhaust port 31. In this case, the operation of pressing down the auxiliary valve element 36 becomes unnecessary, and the valve closing operation becomes one action.
Therefore, although there is a problem in safety confirmation, operability is improved.

The valve body is not necessarily limited to a ball-shaped valve body, but may be any valve that can be opened and closed by turning the operation handle 20. The operation handle is not limited to the lever shape, and various other shapes such as a round shape can be proposed.

[0036]

According to the present invention, an auxiliary valve element for opening and closing an exhaust port opened on the outlet side is movably disposed in the valve housing so as to be movable inward and outward, and the auxiliary valve element is externally attached by a spring. With momentum,
Except for the valve closing position, the operating handle that opens and closes the valve body holds the end of the auxiliary valve body at its lower surface so that it cannot escape outward, and holds the auxiliary valve body at the position that closes the exhaust port. In the closed position, the restraint by the lower surface is released, the auxiliary valve body is retracted outward by the urging force of the spring, and the exhaust port is opened at the outward retracted position. Therefore, from the valve opening position to the valve closing position,
Due to the restraint of the operation handle, the auxiliary valve body is immovably held and the exhaust port is closed, and in the process, the compressed air on the primary side does not leak to the outside from the exhaust port and the air outlet, Operation mistakes and wasted compressed air due to leakage of compressed air from the air outlet during opening and closing operations are avoided.

Further, an arc-shaped guide groove and an open hole are coupled to the operation handle, and at a position other than the valve closing position, the neck portion of the auxiliary valve body is inserted into the guide groove to retreat outward. When the operation handle is moved from the closed position to the open position in the configuration in which the auxiliary valve body is released from the open position and the exhaust port is opened by releasing the restriction of the auxiliary valve body by the opening hole in the closed position. In order to turn the operating handle after pushing the operating head with a finger and aligning its neck with the guide channel, the pressing operation of the operating head and the turning of the operating handle are required, and the lock is required. It is a two-action to remove and turn, it is possible to confirm the valve opening operation, and it is possible to prevent a disaster due to careless rotation of the operation handle or the like. Further, in such a configuration, since the operation head of the auxiliary valve body projects from the upper surface of the operation handle, the pressing operation is facilitated.

Further, the valve housing has an exhaust port opening to the flow path on the outlet side, one end communicating with the exhaust port, an operating hole opening the other end outward, and a plurality of communicating holes communicating with the operating hole. Forming an air outlet hole, and communicating the air outlet hole with the exhaust port through the operation hole at an outward retreat position of the auxiliary valve body attached to the operation hole,
In the configuration in which the residual pressure is removed from the plurality of air outlets, the residual pressure from the exhaust port is dispersed and injected from the plurality of air outlets. The working hole behind will act as a resonance interferometer,
Similar to the operation of a so-called perforated tube type silencer, a silencing effect is produced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a ball valve device 1. FIG.

FIG. 2 is a plan view of the ball valve device 1. FIG.

FIG. 3 is a side view of the ball valve device 1 viewed from an outflow side.

FIG. 4 is a longitudinal sectional side view showing a residual pressure release section 30.

FIG. 5 is a plan view of the ball valve device 1 in a valve closed state.

FIG. 6 is a vertical sectional side view showing the residual pressure release section 30 in a valve open state.

FIG. 7 is a side view of the ball valve device 1 of the embodiment provided with the silencer 60.

FIG. 8 shows a residual pressure release portion 3 showing another closing mechanism of the exhaust port 31.
It is a vertical side view of the principal part of No. 0.

FIG. 9 shows a residual pressure release portion 3 showing another locking mechanism of the elastic connection valve 40.
It is a vertical side view of the principal part of No. 0.

FIG. 10 is a plan view of a ball valve device 1 showing a modification of the operation handle 20.

FIG. 11 is a conceptual diagram showing a modification in which an inclined pressing guide 65 is formed on the upper surface of the insertion section 50.

[Explanation of symbols]

 Reference Signs List 1 ball valve device 2 valve housing 3 inflow port 4 outflow port 5 valve chamber 15 valve body 16 communication hole 20 operation handle 22 guide groove 23 open hole 30 residual pressure release portion 31 exhaust port 32 working hole 35 air outlet 36 auxiliary Valve element 37 Elevating valve 40 Elastic valve 44 Spring 50 Insertion part 51 Neck 52 Operating head 55 Spring 60 Silencer

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (reference) F16K 51/00 F16K 51/00 cf term (reference) 3H051 AA07 BB07 BB10 CC03 CC11 CC16 FF08 3H054 AA03 BB18 BB30 CC03 CD02 GG09 GG14 3H063 AA06 BB15 BB39 BB45 DA03 DC01 EE12 GG02 GG13 3H064 AA07 BA01 CA08 CA13 DA03 3H066 AA06 BA19 BA32 EA14 EA35

Claims (4)

[Claims] 1. A valve housing having a valve chamber between an inlet and an outlet, disposed in the valve chamber, communicating the inlet and the outlet at an open position, and closing the valve. A valve body that shuts off the inflow port and the outflow port at a position, and an operation handle that is disposed outside the valve housing and converts the valve body between a valve opening position and a valve closing position by a rotation operation. In the valve device, in the valve housing, an exhaust port that opens to the outlet side, and an operating hole that communicates with the exhaust port are coupled,
An auxiliary valve body that opens and closes an exhaust port is disposed in the operation hole so as to be movable inward and outward, and the auxiliary valve body is urged outward by a spring, and the operation handle is moved to a position excluding its valve closing position. In the lower surface, the end of the auxiliary valve body is restrained so as not to be able to retreat outward, and the auxiliary valve body is held at a position for closing the exhaust port. In the valve closing position, the restraint by the lower surface is released. ,
A valve device having a residual pressure release function, characterized in that the auxiliary valve element is retracted outward by the urging force of the spring, and the exhaust port is opened at this outward retracted position. 2. An arcuate guide groove centered on the pivot point is formed in the operation handle, and an open hole having a diameter larger than the width of the groove is formed at the end of the guide groove. A fitting portion having a diameter capable of fitting into the opening hole is formed at an upper end portion of the valve body, and an operating head is coupled to the fitting portion via a neck portion that can be inserted into the guide groove. At a position other than the valve closing position of the handle, the neck is inserted into the guide groove, and the upper end of the auxiliary valve body is restrained so as not to be able to retreat outward on the lower peripheral surface of the guide groove. Is held at the position where the exhaust port is closed, and at the valve closing position, the upper end of the insertion portion of the auxiliary valve body is inserted into the opening hole to release the restraint, and the auxiliary valve body is retracted outward by the urging force of the spring. The residual pressure release machine according to claim 1, wherein the exhaust port is opened to restrict the rotation of the operation handle. A valve device with a function. 3. An exhaust port opening to the outlet-side flow path, an operating hole having one end communicating with the exhaust port and the other end opening outward, and a plurality of operating holes communicating with the operating hole. At the retreating position of the auxiliary valve body attached to the working hole, the air blowing hole communicates with the exhaust port through the working hole, and the residual pressure is generated from the plurality of air blowing holes. 3. The valve device having a residual pressure release function according to claim 1, wherein the valve device is configured to eliminate the pressure drop. 4. The valve body is a ball-shaped valve body having a communication hole formed therein, and the ball-shaped valve body is pivotally supported by an operation handle, and the inlet and the outlet are formed through the communication hole by rotating the valve body. The valve having a residual pressure release function according to any one of claims 1 to 3, wherein the valve is controlled to be converted into a valve opening position where the valve communicates with a valve and a valve closing position where the inlet and the outlet are shut off. apparatus.