JP2559806Y2 - Manual operation device for valve device - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a manual operation device for a valve device,
In particular, the present invention relates to the operation mechanism, and can be used for an opening / closing operation mechanism of a valve body that linearly moves and opens and closes a circuit, such as a lift valve.

[0002]

[Prior Art and Issues] As a relief valve,
-146732, there is a circuit disclosed in Japanese Patent Application Laid-Open No. H06-146732, in which when the pressure in the circuit on the upstream side of the relief valve exceeds a certain level, the pressure is released and, if necessary, the circuit in the relief valve main body is released. It can be manually opened and closed.

For this reason, as shown in FIG.
In (1), when the internal pressure of the upstream circuit exceeds a certain level,
The reaction valve (2a) that moves downstream and the on-off valve (2b) that closes the valve port (21) formed in the reaction valve (2a) are coaxially built-in, and can be moved back and forth. An operating shaft (11), which can be maintained at two positions, a pushed position in a pressed state and an initial position in a non-pressed state, is disposed so as to be able to slide in an airtight state with respect to the valve case (1). , The operation axis (1
1) is coaxially opposed to the valve port (21) from the downstream side.

In this device, the responsive valve (2a) and the on-off valve (2b) are provided opposite to the inlet of the valve case (1), and the responsive valve (2a) is disposed downstream of the responsive valve (2a). It is normally set at a fixed position in the valve case (1). And, with respect to this response valve (2a),
(2b) is urged to the downstream side by a spring provided on the upstream side, and is normally maintained in a state where the valve port (21) is closed.

In this device, since the tip of the operating shaft (11) faces the valve port (21), when the internal pressure on the upstream side rises,
The response valve (2a) moves downstream against the corresponding spring (13), and the on-off valve (2b) also moves integrally therewith.When a predetermined movement amount is reached, the operation shaft (11) When the on-off valve (2b) is in contact with the tip of the valve, the on-off valve (2b) opens the valve port (21) and functions as a safety valve.

When the upstream side is in a negative pressure state, the responsive valve
While (2a) is maintained at the localized value, the on-off valve (2b) moves upstream against the urging force of the spring acting on the valve, and the negative pressure state is eliminated. In addition, the operation axis (1
When the operating shaft (11) is pushed in, the responsive valve (2a) is forced into the valve case.
The on-off valve (2b) is opened while maintaining the localization value in (1), and can be opened and closed manually.

As described above, this conventional device can be manually opened and closed, and functions as a relief valve when the pressure in the upstream circuit becomes higher than a certain level, and when the upstream side is in a negative pressure state. There is an advantage of exhibiting a function to solve this. However, in this conventional device, manual opening and closing operations are troublesome. In order to lock the operating shaft (11) from the non-advanced position to the advanced position, it is necessary to push the operating part of the operating shaft (11) and then rotate the operating part by a certain angle. Because it becomes.

In order to solve such inconvenience, it is not impossible to adopt a method of driving the operating shaft (11) forward and backward by adopting a conventionally known lever mechanism. By pressing (11), the valve is forcibly opened, so that the valve is opened when the operating part of the lever is pushed, and conversely, the valve is closed when the operating part of the lever is pulled up. The relationship between the lever position and the opening and closing of the valve is
The relationship between the opening and closing of the valve of the conventional lever type on-off valve and the position of the lever is the opposite relationship, and the possibility of erroneous operation remains.

The present invention has been made in view of the above-mentioned point, and is described as follows. A valve case (1) accommodates an on-off valve which is opened and closed by an external operation, and an operating shaft (1) for opening and closing this on-off valve.
1) is opposed from the downstream side of the on-off valve, and the opening and closing of the on-off valve can be opened and closed by a lever in the valve device manual operation device in which the on-off valve is opened by pushing the operating shaft (11). It is another object of the present invention to make the relationship between the opening and closing of the on-off valve and the attitude of the lever in the opening and closing operation by the lever similar to that of another ordinary lever-type manual operation device.

[Regarding the Invention of Claim 1]

[0011]

[Technical Means] The technical means of the present invention for solving the above-mentioned problem is that a shaft head (5) is continuously provided at the protruding end of the operating shaft (11) from the valve case (1). A spring (13) for urging the operating shaft (11) toward the protruding end side is interposed between (5) and the valve case (1), and the most protruding position of the operating shaft (11) is kept at a fixed position. Set the stopper (14) to be set on the valve case (1), and
A lever (3) whose output end is in contact with the upper end surface of (5) is rotatably supported by a bearing (4) provided on the valve case (1), and a fulcrum shaft (30) of the lever (3) is supported. The lever (3) is located at the position coinciding with the extension of the axis of the operating shaft (11) and above the shaft head (5) at the initial position, and the lever (3) is attached to the tip of the linear plate-shaped operating portion (32). On the other hand, an upright side portion (31) bent at a substantially right angle is formed, and the fulcrum shaft (30) of the lever (3) is connected to the vicinity of the distal end of the operating portion (32) and the upright side portion (31). ), And the fulcrum shaft (30) and the operation unit (3
The distance between the fulcrum axis (30) and the upright side (31) is set to be larger than the distance between the fulcrum axis (30) and the operation section (32). The shaft head (5) and the fulcrum shaft (3
0) is slightly smaller than or approximately equal to the distance from the distance.)

[0012]

The above technical means operates as follows. lever
The fulcrum shaft (30) of (3) is the tip of the operation part (32) and the upright side (31).
And the fulcrum shaft (30) is located above the shaft head (5) and coincides with the axis of the operating shaft (11). Also, the outer distance between the fulcrum shaft (30) and the operation unit (32) is slightly smaller or substantially smaller than the distance between the shaft head (5) where the operation shaft (11) is at the initial position and the fulcrum shaft (30). Matches.
Therefore, in a horizontal posture in which the operation unit (32) is perpendicular to the axis of the operation shaft (11), the vicinity of the distal end of the operation unit (32) is in contact with or facing the upper surface of the shaft head (5), The operating shaft (11) is not pushed. That is, when the operation unit (32) is in the horizontal posture, the on-off valve is in the valve closed state, which coincides with the posture in the case of a normal lever-type valve device.

In this state, when the lever (3) is turned so that the operation portion (32) is in the upright state, the upright side portion (31) comes into contact with the shaft head (5). At this time, the operation unit (32)
The fulcrum shaft (30) is located almost above the center of the
(3) is maintained in this position. Further, since the distance between the fulcrum shaft (30) and the upright side (31) is set to be larger than the distance between the fulcrum shaft (30) and the operation section (32), the shaft head is moved from the fulcrum shaft (30).
The distance to (5) is large, and the operating shaft (11) is pushed in a certain stroke compared to when the lever (3) is in the valve-closed position. As a result, the on-off valve is pushed by the operation shaft (11) and is maintained in the open state.

[0014]

[Effect] Even in a valve device in which the operating shaft (11) is pushed in and the on-off valve is opened, the relationship between the posture of the lever (3) and the on-off state of the on-off valve is the same as that of the conventional lever type. Since it matches the case of the valve device, erroneous operation can be prevented. [About the device of claim 2]

[0015]

[Technical Means] This invention solves the same problem as the invention of the first aspect, and the technical means adopted for this purpose is “the projecting end of the operating shaft (11) from the valve case (1). A shaft head (5) is connected to the shaft, and a spring (13) for urging the operating shaft (11) toward the protruding end is interposed between the shaft head (5) and the valve case (1). In addition, a stopper (14) for setting the most protruding position of the operating shaft (11) at a fixed position is provided on the valve case (1), and a fulcrum shaft (30) is provided at the upper end of the shaft head (5). A lever that allows the linear plate-shaped operation unit (32) to rotate from a horizontal position to an upright position
(3), the lever (3) is provided with an upright piece (33) having the fulcrum shaft (30) protruding from the operating section (32), and the upright piece (33) is A first side (33a) parallel to the section (32) and a second side (33b) substantially perpendicular thereto and located on the operation end side of the operation section (32) with respect to the fulcrum shaft (30). , These first
The fulcrum axis (30) is in a range surrounded by the side (33a) and the second side (33b).
And a tongue piece (4) that contacts the first and second sides from above and is perpendicular to the axis of the operating shaft (11).
(1) is attached to the valve case (1), and the distance between the fulcrum shaft (30) and the first side (33a) is larger than the distance between the fulcrum shaft (30) and the second side (33b). The distance between the fulcrum axis (30) and the first side (33a) is set to a large value.
(41) is slightly smaller than or substantially equal to the distance between the fulcrum shaft (30). "

[0016]

According to the above technical means, when the lever (3) is set so that the operating portion (32) is in a horizontal posture, the first side (33a) is in contact with the tongue piece (41). opposite. Support shaft (30)
The distance between the operating axis (11) and the first side (33a) is set to be slightly smaller than or substantially equal to the distance between the tongue piece (41) at the initial position and the fulcrum axis (30). The shaft (11) is not pushed in, and the on-off valve in the valve case (1) is closed.

Next, when the operating portion (32) of the lever (3) is turned to an upright posture, the upright piece (30) is pivoted about the fulcrum shaft (30).
(33) rotates, but at this time, the shaft head with respect to the tongue (41)
Since the upright piece (33) pivotally supported by (5) is located below, the first side (33a) and the second side (33b) come into contact with the lower surface of the tongue piece (41) and rotate, The operation axis (11) is moved according to the distance from the axis (30) to each part of each of these sides. Since the distance between the fulcrum axis (30) and the second side (33b) is set to be larger than the distance between the fulcrum axis (30) and the first side (33a), the operating unit (32) is in an upright posture. In this case, the distance between the fulcrum shaft (30) and the tongue piece (41) becomes longer, and the operation shaft (11) is pushed in accordingly. As a result, the on-off valve in the valve case (1) is pushed in the valve opening direction to open.

As described above, also in the case of the present invention, the same effects as those of the first aspect of the present invention can be obtained.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. Example 1 Example 1 shown in FIGS. 2 to 5 is similar to the conventional example,
The on-off valve of a relief valve comprising a response valve (2a) and an on-off valve (2b)
(2b) can be forcibly opened and closed.

In this embodiment, a connection cap (15) having a small-diameter connection port is screwed into the inlet side of the valve case (1), and the valve chamber () is closed by the connection cap (15). The above-mentioned response valve (2a) is provided in the outer periphery of the valve chamber (20) so as to be able to slide up and down in an airtight state, and a spring (2) disposed between the upper end wall surface of the valve chamber (20) and the response valve (2a). 22) According to the response valve
(2a) is biased downward. And in the normal state,
The responsive valve (2a) comes into contact with the inner end of the connection cap (15), and the inoperative position of the responsive valve (2a) is determined.

On the downstream side of the valve port (21) of the response valve (2a), a bearing rod (23) is installed, and an opening / closing valve having a valve shaft (24) inserted therethrough.
(2b) is opposed from the upstream side of the valve port (21), and is normally urged in the valve closing direction by a spring (25) interposed between the tip of the valve shaft (24) and the bearing rod (23). ing. Therefore, when the response valve (2a) is upwardly responded to by the pressure of the upstream circuit, the on-off valve (2b) is also activated integrally therewith.

On the other hand, the operating shaft (11) extends from the upper end wall of the valve chamber (20).
Project so as to face the valve shaft (24), and the operation shaft (1
1) penetrates the constituent wall surface of the valve chamber (20) in an outer peripheral airtight state.
A shaft head (5) is connected to a protruding end of the valve case (1) protruding outside the valve case (1). A flange (51) extends from the lower end of the shaft head (5), and the flange (51) is attached to and fixed to a cylindrical portion protruding from the upper surface of the valve case (1). The spring (13a) is accommodated in a spring chamber (13a) formed by a cap-shaped stopper (14) that is screwed into the spring (13a), and a spring (51) is interposed between the bottom wall of the spring chamber and the flange portion (51). 13), the most protruding position of the operation shaft (11) is determined by the contact between the stopper (14) and the flange portion (51).

The bearing (4) has a structure in which a plate is bent into a U-shaped cross section. The stopper (14) and the shaft head (5) project between a pair of bearing plates (42). Provided and bearing
The bottom wall portion of (4) is sandwiched between the stopper (14) and the packing retainer (16) and is fixed to the valve case (1). On the other hand, the working end of the operating portion (32) of the lever (3) has an upright side portion (31).
An upright piece (31a) is formed, and shaft support pieces (34) and (34) are provided on both sides of the upright piece (31a).
A gourd-shaped opening (35) is formed in a range extending from between the shaft supporting sides in the vicinity of the tip of the upright piece (31a), and a portion of the opening located between the shaft supporting pieces (34) and (34) is a shaft. The enlarged portion is larger than the cylindrical shaft (52) protruding from the upper surface of the head (5), and the range from this enlarged portion to the vicinity of the tip of the upright piece (31a) is a small-diameter portion at the lower end of the cylindrical shaft (52). The interval is set slightly larger than the interval.

The lever (3) having the above configuration is adjusted so that the enlarged portion of the opening (35) and the cylindrical shaft (52) coincide with each other.
(34) is inserted between the bearing plates (42) and (42), and the fulcrum shaft (30) is inserted between the shaft support piece (34) and the bearing plate (42).
(3) is rotatably supported about the fulcrum shaft (30). In this embodiment, an elastic ring made of a wire bent in a C shape is used.
The fulcrum shafts (30) and (30) are configured to protrude inward from both ends of (30a). Therefore, the bearing plates (42) (42) and the shaft support
The lever (3) is attached to the bearing (4) by inserting the fulcrum shafts (30) and (30) from the outside between these shaft holes while maintaining (34) and (34) at appropriate positions.

In the above embodiment, the operating shaft (11) is in the initial position (the state at the highest position in FIG. 2),
When (2a) is in the inoperative position and the on-off valve (2b) closes the valve port (21), there is a slight gap between the tip of the operating shaft (11) and the tip of the valve shaft (24). In this valve-closed state, the lower surface of the operating unit (32) in the horizontal posture substantially coincides with the upper surface of the shaft head (5). This state is lever (3)
In the closed position.

When the lever (3) is rotated from this valve closing position so that the operating portion (32) is in the upright position, the distance between the fulcrum shaft (30) and the outer surface of the upright side portion (31) is increased. Since the distance between the fulcrum shaft (30) and the lower surface (outer surface) of the operation unit (32) in the valve-closing position is set to be larger, the shaft head (5) and the integral with the shaft head (5) correspond to this difference. Operation shaft (11) is pushed in. Thereby, the on-off valve (2b) opens.

Even if the lever (3) is in the valve closing position, if the internal pressure of the upstream circuit becomes higher than the set pressure, the responsive valve
(2a) reacts against the biasing force of the spring (22), and the on-off valve (2b) that responds integrally with the spring (22) has the valve shaft (24) as in the above case.
Is pushed by the operating shaft (11), and the on-off valve (2
b) is opened. That is, it functions as a relief valve or a safety valve.

Also, when the upstream side of the response valve (2a) and the on-off valve (2b) becomes a negative pressure, the on-off valve (2b) is opened in the same manner as the conventional one. That is, it functions as an air supply valve.
In this embodiment, the outer surface of the plate-shaped upright piece (31a) is the upright side portion (31). However, as shown in FIG. 5, a shaft support piece (3) that stands upright from both sides of the lever (3). 34) The tip side of (34) may be made to coincide with the outer side surface of the upright piece (31a), and this tip side may be used as the upright side portion (31).

[Embodiment 2] This embodiment corresponds to the invention of claim 2.
The configuration inside the valve case (1) is the same as in the first embodiment.
Since the manual operation device provided in the penetrating portion of the operation shaft (11) is different, this point will be described.

As shown in FIGS. 6 and 7, the stopper (14) is inserted into the cylindrical portion formed on the outer surface of the valve case (1) through the penetrating portion of the operating shaft (11).
The flange (51) formed at the lower end of the shaft head (5) is housed in a spring chamber (13a) formed by the stopper (14) and the cylindrical portion. A spring (13) is interposed between the bottom of (13a) and the flange portion (51), and the operation shaft (11) is urged in a protruding direction (upward direction).

The lever (3) is rotatably supported by the upper end of the shaft head (5). For this purpose, the following configuration is adopted. A shaft hole through which the fulcrum shaft (30) is inserted is formed in an upright piece (33) which is erected from both sides on the working end side of the lever (3).
A pair of shaft holes (53) (53) are also formed in the radial direction at the upper end of (5). A fixing plate (40) having a pair of support plates (45) (45) parallel to each other with a shaft head (5) protruding from the valve case (1) is fixed to the valve case (1). (45) (45) has a long hole (43) (43) of a fixed length at a position facing the shaft hole (53) (53).
Are formed. The length of this long hole (43) is
Is set to be longer than the pushing stroke of the operation shaft (11) required to open the valve.

A U-shaped retaining ring made of an elastic wire
The fulcrum shafts (30) and (30) protruding from both ends of (36) are supported on the support plate (45).
(45) through the slots (43) and (43) from outside the upright pieces (3
When the lever (3) is inserted into the shaft hole of the shaft head (5) and the shaft head (5), the lever (3) is rotatably mounted on the shaft head (5). Upright piece (33)
Is generally rectangular and has a first side (33a) parallel to the operation unit (32) and a position substantially perpendicular to the first side (33a) and on the operation end side of the operation unit (32) with respect to the fulcrum shaft (30). And a shaft hole for inserting the fulcrum shaft (30) in a range surrounded by the first side (33a) and the second side (33b).

On the other hand, a tongue piece (41) is provided on the upper end of the support plate (45).
The first side (33a) of the upright piece (33) that is in a horizontal position with respect to the shaft head (5) when the tongue piece (41) is in the re-elevated position. ). With the above configuration, when the lever (3) is in the horizontal position, the operating shaft (11) is not pushed in as shown in FIG. 6, and when the lever (3) is turned to the upright position, As shown in 8,
The tongue piece (41) and the second side (33b) come into contact with each other, and the shaft head (5) is pushed in by the above-described action. That is, the shaft head (5) is pushed in by a stroke substantially matching the difference between the distance from the shaft hole of the fulcrum shaft (30) to the first side (33a) and the distance from the shaft hole to the second side (33b). As a result, the on-off valve (2b) is opened.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a conventional example.

FIG. 2 is a sectional view of the first embodiment of the present invention.

FIG. 3 is a front view thereof.

FIG. 4 is a plan view of the lever (3).

FIG. 5 is an explanatory view of another example of the lever (3).

FIG. 6 is a sectional view of a main part of the second embodiment.

FIG. 7 is a front view thereof.

FIG. 8 is a diagram illustrating the relationship between the lever (3) and the tongue piece (41) in the valve-open state according to the second embodiment.

[Explanation of symbols]

 (1) ・ ・ ・ Valve case (11) ・ ・ ・ Operation shaft (5) ・ ・ ・ Shaft head (13) ・ ・ ・ Spring (14) ・ ・ ・ Stopper (3) ・ ・ ・ Lever (4) ・ ・・ Bearing (30) ・ ・ ・ Support shaft (32) ・ ・ ・ Operation part (31) ・ ・ ・ Erect side (33) ・ ・ ・ Erect piece (33a) ・ ・ First side (33b) ・ ・ Second Side (41) ・ ・ ・ Tongue (40) ・ ・ ・ Fixed plate

Claims (2)

(57) [Scope of request for utility model registration] An on-off valve which is opened and closed by an external operation is accommodated in a valve case (1), and an operation shaft (11) for opening and closing this on-off valve is opposed from a downstream side of said on-off valve, and said operation is performed. In a manual operation device of a valve device in which an on-off valve is opened by pushing a shaft (11), a shaft head (5) is connected to a protruding end of an operation shaft (11) from a valve case (1), This axis head
A spring (13) for urging the operating shaft (11) toward the protruding end side is interposed between (5) and the valve case (1), and the most protruding position of the operating shaft (11) is kept at a fixed position. A stopper (14) to be set is provided on the valve case (1), and a lever (3) whose output end is in contact with the upper end surface of the shaft head (5) is rotated by a bearing (4) provided on the valve case (1). The lever (3) is pivotally supported, and the fulcrum shaft (30) of the lever (3) is positioned above the shaft head (5) at the position coinciding with the extension of the axis of the operating shaft (11) and at the initial position. The lever (3) has a configuration in which an upright side portion (31) bent substantially at right angles to the tip of a linear plate-shaped operation portion (32) is formed, and the lever (3)
The fulcrum shaft (30) is set in a range surrounded by the vicinity of the tip of the operation unit (32) and the upright side (31),
The fulcrum axis (30) is larger than the distance between the fulcrum axis (30) and the operation unit (32).
The distance between the fulcrum shaft (30) and the operation unit (32) is set to be large, and the outer distance between the fulcrum shaft (30) and the operation unit (32) is set to the shaft head (5) and the fulcrum when the operation shaft (11) is at the initial position. A manual operating device for the valve device, which is slightly smaller or substantially coincident with the distance from the shaft (30). 2. An on-off valve which is opened and closed by an external operation is accommodated in a valve case (1), and an operating shaft (11) for opening and closing the on-off valve is opposed from a downstream side of the on-off valve, and In a manual operation device of a valve device in which the opening and closing valve is opened by pushing the shaft (11), a flange body shaft head (5) is connected to the protruding end of the operation shaft (11) from the valve case (1). And
A spring (13) for urging the operating shaft (11) toward the protruding end is interposed between the shaft head (5) and the valve case (1), and the most protruding position of the operating shaft (11) is determined. Stopper set at a fixed position (14)
Is provided in the valve case (1), and a fulcrum shaft is provided at the upper end of the shaft head (5).
A lever (3) having a linear plate-shaped operating portion (32) having a range from a horizontal position to an upright position;
In (3), an upright piece (33) provided with the fulcrum shaft (30) is protruded from the operating section (32), and the upright piece (33) has a third piece parallel to the operating section (32). One side (33a) and substantially perpendicular to it and the fulcrum axis
The second side (3) located on the operation end side of the operation unit (32) with respect to (30)
3b), the first side (33a) and the second side (33a).
b) Place the fulcrum axis (30) in the area surrounded by, and
The first and second sides are in contact with each other from above and the operating shaft
Fixing plate (4) having a tongue (41) perpendicular to the axis of (11)
0) is attached to the valve case (1), and the fulcrum shaft (30) and the first side (3
The distance between the fulcrum axis (30) and the second side (33b) is set to be larger than the distance between the fulcrum axis (30) and the first side (33a). A manual operation device for a valve device wherein the distance between the tongue piece (41) and the fulcrum shaft (30) is slightly smaller or substantially equal to the distance.