JPS6121659Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an opening/closing device for a cone valve (such as a funnel valve or a cockpit valve) having a conical valve body that rotates inside a body having a fluid inlet and outlet passage.

Some so-called cone valves, which control fluid by means of a conical valve body rotating inside a body with fluid inlet and outlet passages, reduce the opening and closing torque of the valve, making the opening and closing operation easier, and have a long-term lifespan. In order to keep the seal portion airtight, some valves open and close the valve by moving the valve body up and down and seating it on and off from the seal member of the body before and after the valve body rotates. However, these operating mechanisms have a large number of parts and have a complicated shape, resulting in increased processing and assembly man-hours and increased costs.

In this type of cone valve, the present invention enables both the movement of the valve body into and out of the sealing member and the rotation of the valve body by operating a single manual shaft.
It is an object of the present invention to provide a cone valve opening/closing device that can be easily and reliably operated, has a simple structure, and is inexpensive.

Another purpose of the present invention is to reduce the rotational movement of the valve body near the beginning and end of rotation, thereby softening the impact of the rotational movement, and improving the performance of the valve by preventing sudden changes in the fluid. It is to be.

An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1 and 2, 1 is a fluid passage 1a.
and a body having a valve seat 1b; 2 is a cone-shaped valve body having one fluid passage 2a and a valve seat 2b;
3 is an upper lid fixed to the body 1; 4 is a valve shaft fixed to the valve body 2; 5, 6, and 11 are bearings for supporting the valve body 2 and the valve shaft 4 in a rotatable and vertically movable manner; 7 is a valve Shaft seal, 8 is seal holder,
9 is a mechanism case fixed to the upper lid 3, and 10 is a lid of the mechanism case 9.

The valve shaft 4 facing into the mechanism case 9 has one radial groove 14a, and arcuate surfaces 14 on both sides of this groove.
A driven lever 14 having a Geneva tooth profile, which is formed so that the angle between the center of each arc and the center of the valve shaft is 90 degrees, is fixed to the drive levers 14 and 14c, and a drive wheel 13 in the form of a disk is provided. A pin 13a protruding perpendicularly to the plate surface is provided near the peripheral edge of the drive vehicle plate surface, and a concentric annular wall 13b having a notch 13c facing the pin 13a is provided on the plate surface inside the pin 13a. The driven wheel 13 is fixed to the drive shaft 12 which is arranged parallel to the valve shaft 4 in the mechanism case 9, and the pin 13a is engaged with the groove 14a of the driven lever 14, and the annular wall 13
b fits into the arcuate surfaces 14b and 14c of the driven lever 14, and the driven lever 14 is formed to rotate intermittently as the drive wheel 13 rotates. Furthermore, the drive wheel 13 has an abutment piece 28 that abuts against a fully closed stopper 9a provided in the mechanism case 9, and an abutment piece 28 that abuts against a fully open stopper 9b that is provided symmetrically within the mechanism case 9 and the fully closed stopper 9a. The mating pieces 29 are respectively provided symmetrically about the pin 13a. This determines the rotation angle of the drive wheel 13, which is determined by the rotation angle of the valve body 2 required to open and close the rotary valve.

In the figure, a drive wheel 13 has a stop pin 2 attached to a drive shaft 12 rotatably supported by bearings 19 and 20.
1, and the driven lever 14 is fixed to the valve shaft 4 by a key 24 and a locking nut 25. Furthermore, the drive shaft 1 inside the mechanism case 9
2 and the valve shaft 4 are provided with a pair of gears 15 and 16, the gear 15 is fixed to the drive shaft 12 by a key 22 and a retaining ring 23, and the gear 16 is connected to a threaded portion 4a provided on the outer periphery of the valve shaft 4. Matching lift nut 18
It is fixed to the outer periphery of with a set screw 27.
A flange-like annular flange 18a is provided at the end of the lift nut 18, and the lift nut 18 is rotatably supported by the mechanism case 9 by a thrust ring 17 that holds the flange 18a and a stop bolt 17a. . Therefore, when the lift nut 18 is rotated, the valve shaft 4 can be moved up and down by the threaded screw 4a, and by the engagement of the gears 15 and 16, the handle 26 attached to one end of the drive shaft 12 is rotated. The valve body 2 fixed to the other end of the valve shaft 4 moves up and down.

Next, the opening/closing operation of the cone valve constructed as described above will be explained based on FIGS. 1 to 5. still,
3 to 5 are cross-sectional views taken along the line B--B in FIG. 1, showing the operating mechanism shown in FIG. 2 as viewed from below.

(1) Lifting operation of the valve body FIGS. 1 and 2 show a state in which the valve body 2 is in a fully closed position and the seal members of the valve seats 1b and 2b are crimped. FIG. 3 shows the positional relationship between the driving wheel 13 and the driven lever 14 in the above state.

When the handle 26 is turned counterclockwise in FIG. 2 from this state (the drive shaft 12 turns clockwise in FIG. 3), the drive wheel 13 rotates;
Since the circular arc surface 14b of the driven lever 14 and the outer peripheral surface of the annular wall 13b of the drive wheel 13 only slide, the driven lever 14 does not rotate, and therefore the valve body 2 fixed to the valve shaft 4 also does not rotate. . but,
As the drive wheel 13 rotates, the gear 15 provided on the drive shaft 12 rotates, so the lift nut 18 rotates via the gear 16 that meshes with the gear 15.
The valve shaft 4 screwed into the lift nut is raised (referred to as a lift) to lift the valve body 2. That is, only the lift is performed without rotating the valve body 2. This operation occurs when the pin 13a moves into the groove 1 shown by the imaginary line in FIG.
This is done while the driving wheel 13 rotates up to the vicinity of the inlet of 4a, and this is explained with reference to FIG. does not change at all, and the lift amount B changes from point O to point P.

(2) Opening operation of the valve body When the lift operation is completed and the handle 26 is further turned, the pin 13a of the driving wheel 13 will move to the driven lever 14.
The driven lever 14 also starts rotating together with the drive wheel 13, so that the driven lever 14 applies an opening action to the valve body 2 via the valve shaft 4. When the driven lever 14 rotates,
As shown in FIG. 4, the driven lever 14 is connected to the annular wall 1
The pin 13a fits into the notch 13c of the pin 3b.
fits into the groove 14a. Then, as the rotation continues, the pin 13a rotates the driven lever 14 while returning through the groove 14a, and as shown in FIG. 5, the abutting piece 29 abuts against the full-open stopper 9b and stops. During this time, the lift nut 18 also rotates via the gears 15 and 16, but since the valve shaft 4 also rotates in the same direction as the lift nut 18 together with the driven lever 14, the amount of lift does not change much. To explain this with reference to FIG. 6, as the lift nut 18 rotates, the lift amount B attempts to move from point P to point Q on the virtual line, but as the valve shaft 4 rotates together with the driven lever 14, the amount of lift B moves back. S is subtracted and the lift amount remains substantially from point P to point R. Incidentally, the increase or decrease of the lift amount while reaching the R point is controlled by the pin 13 that rotates the driven lever 14.
Since the position of a changes within the groove 14a, the valve stem 4 rotates slowly at first, and the deeper the pin 13a enters the groove 14a and gets closer to the valve stem 4, the faster the pin 13a turns, and eventually the pin 13a returns to the groove 14a and rotates as shown in FIG. This is because it rotates slowly as it reaches the fully open state.

(3) Closing operation of the valve body The closing operation is the complete opposite of the lift operation and opening operation described above.

First, from the valve fully open position shown in Figure 5,
If the handle 26 is turned in the opposite direction, the driving wheel 1
The pin 13a of No. 3 is the guide path 14 of the driven lever 14.
a to reversely rotate the lever 14, thereby applying a closing action to the valve body 2 via the valve shaft 4.
When the valve body 2 is closed and the pin 13a and the groove 14a are disengaged from each other (the imaginary line in FIG. 3), the driven lever 14 stops rotating and the valve body 2 stops rotating.

On the other hand, in parallel with the rotation of the driving wheel 13, the lift nut is also rotated by the gears 15 and 16.
Since the valve shaft 4 is also rotating in the same direction as the rotational direction of the lift nut 18, the amount of lift remains approximately constant during the closing operation, although it increases or decreases somewhat depending on the relative angles of these.

(4) Seating operation of the valve body When the handle 26 is further rotated in the closing direction,
Similar to item (1) above, since the pin 13a and the groove 14a are disengaged, the driven lever 1
4 does not rotate and the valve body 2 also does not rotate.

The gear 1 that moves together with the rotation of the drive wheel 13
5 and 16, the lift nut 18 is rotated. Since the rotation direction at this time is opposite to the rotation direction in item (1), the rotating lift nut 18 applies a seating motion to the valve body 2 via the threaded portion 4a and the valve shaft 4, and the valve seats 1b, 2b Crimp the seal member. The seating operation of the valve body 2 is completed when the stopper 28 abuts against the abutting portion 9a of the mechanism case 9.

With the above items (1) to (4), one cycle of the opening/closing operation of the rotary valve is performed smoothly and reliably.

As shown in Figures 1 and 2, the main part of the present invention is simply a combination of a driving wheel and a driven lever, which partially have the tooth profile of a Geneva gear, and a plurality of gear elements. Because of its structure, it is easy to manufacture. In addition, the opening and closing operation of the valve body is performed when the pin 13a is inserted into the groove 14.
The rotation radius of the driven lever 14 changes as it moves within a, with a large rotation radius at the beginning of rotation, gradually becoming smaller, and then returning to a large rotation radius again.
Conversely, the rotation speed of the driven lever is slow at the beginning of rotation, then gradually increases, and then rotates slowly again. Therefore, the load fluctuation associated with rotational movement is smooth, making it easy to operate.
Because it softens the impact of rotational movement, it operates reliably without mechanical strain, resulting in a highly reliable operating mechanism.

Furthermore, since the opening/closing characteristic of the valve shows an S-shaped curve as shown in the valve opening degree A shown in FIG. The flow rate can be adjusted smoothly without causing sudden changes to the flowing fluid. This not only helps prevent water hammer phenomenon in the flow path and does not damage the strength of the valve, but also protects other equipment in the flow path system.

In the above embodiment, the lift nut 18 is rotated via the gears 15 and 16, but the gear 1
It is also possible to adopt a link mechanism instead of 5 and 16. Furthermore, by changing the engagement between the driving wheel 13 and the driven lever 14, it is also possible to freely change each direction of movement. Furthermore, by attaching an electric operating machine in place of the handle 26, motor drive is also possible.

Since the device of the present invention is as described above, the following effects can be obtained.

(1) The number of parts is relatively small, and processing, assembly, and adjustment are easy.

(2) It is inexpensive.

(3) Since the rotational movement of the valve body is characterized by deceleration relative to the rotation angle of the handle near the beginning and end of rotation, it is possible to soften the impact of the rotational movement and prevent sudden changes in the fluid. . (See Figure 6) (4) The valve can be opened and closed and the seat member can be attached and detached easily and reliably using a single handle.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the device of the present invention;
Figure 2 is a sectional view taken along the line A-A in Figure 1, Figures 3 to 5 are explanatory diagrams of the operation of the members in the BB-B cross-sectional view of Figure 1, and Figure 6 is the handle rotation angle. FIG. 3 is a diagram showing the relationship between the valve opening degree and the lift amount. 1...Body, 2...Valve body, 3...Top lid, 4...
Valve stem, 9... Mechanism case, 12... Drive shaft, 18
... Drive wheel, 13a ... Pin, 13b ... Concentric annular wall, 13c ... Notch, 14 ... Followed lever, 14a ... Radial groove, 14b, 14c ... Concave arc surface, 15, 16 ... ...Gear, 17...Thrust ring, 18...Lift nut, 26...Handle.

Claims (1)

[Scope of utility model registration request] In cone valves, which control fluid by means of a conical valve body that rotates inside the body with fluid inlet and outlet passages, a part of the drive shaft is cut out on the drive shaft, which is installed parallel to the valve shaft at the top of the valve shaft. A drive wheel having a concentric annular wall and a pin is provided, and a driven lever is provided on the valve shaft, having a groove that engages with the pin and a concave arc surface that engages with the annular wall on both sides thereof, and a gear on the drive shaft. Another gear that meshes with this gear is attached concentrically to the outer circumference of the lift nut that engages with a screw provided on the outer circumference of the valve shaft, and the lift nut and drive shaft are rotatably attached to the mechanism case that houses these mechanisms. A cone valve opening/closing operating device that sequentially performs seating/seating movement and opening/closing rotational movement of the valve body.