JPS6212429B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a valve seat cleaning device for a swing type valve connected to a dust transport pipe or a fluid pipe containing dust.

Conventional swing type valves, e.g. Japanese Patent Publication No. 47-43255
In the valve disclosed in the publication, a rotary valve stem passes through a valve body and is pivotally supported, a valve body is provided inside the valve body of the valve body, and the valve body is swung by the valve body to open the valve body. The structure is such that the valve body valve seat is positioned so that it can come into contact with the valve box seat provided at the inlet, and the valve seat provided on the valve box side (valve box valve seat) contains fluid such as water, steam, air, etc. Although a cleaning device is installed that sprays and cleans the valve, such a device was not installed on the valve seat on the valve body side (valve body valve seat). Therefore, the valve body valve seat is cleaned, but the valve body valve seat is not cleaned, so the adhesion between the valve body valve seat and the valve body valve seat may become incomplete due to dirt and dust adhering to the valve body valve seat. Otherwise, the valve seat may be damaged and airtightness cannot be maintained, and equipment and maintenance costs are high because a pressure device for cleaning fluid and supply piping are required on the valve seat side of the valve box. There were some drawbacks, such as:

This invention eliminates the drawbacks of the above-mentioned conventional devices, and can clean not only the valve body valve seat but also the valve body valve seat, and does not require a pressurizing device for cleaning fluid, resulting in equipment cost. It is an object of the present invention to provide a valve seat cleaning device for a swing type valve, which can reduce the maintenance costs.

In order to achieve the above object, the present invention is characterized by adopting the following configuration. That is, a guide flange is provided on the outer peripheral edge of the valve seat of the valve body, a first scraping member that is slidable along the surface of the valve seat of the valve body is disposed on the guide flange, and a first scraping member that is slidable along the surface of the valve body of the valve body is disposed on the guide flange, and A second scraping member that is slidable along the surface of the seat is provided, a guide shaft is rotatably provided through the valve box, and the guide shaft is provided with a movable member that swings according to the opening/closing operation of the valve body. The proximal end of a bifurcated swinging member is fixed, and the proximal end of a connecting lever is pivotally supported at the distal end of one arm of the swinging member.
The tip of the other arm of the swinging member is engaged with the scraping member, and the tip of the other arm of the swinging member is engaged with the second scraping member, and the guide shaft and the valve stem are moved in the same direction as the valve stem rotates. They are connected via a connecting member so that they can rotate.

Next, the action will be explained.

When the valve stem is rotated from the valve body fully open position in the valve body closing direction, the valve body is gradually swung in the closing direction, and the guide shaft is rotated in the same direction via the connecting member, so that the oscillating member is swung, and as a result, the connecting lever, which is pivoted between the distal end and the base end of the other arm of the oscillating member, also moves following the oscillating movement of the oscillating member, and the distal end of the connecting lever The second scraping member engaged with the second scraping member slides along the surface of the valve seat of the valve body and scrapes off dust and the like adhering to the surface of the valve seat of the valve body. On the other hand, the first scraping member, which is engaged with the tip of one arm of the swinging member, also slides along the surface of the valve seat of the valve box of the guide flange, removing dust and dirt attached to the surface of the valve seat of the valve box. scrape off. When the valve body valve seat comes into contact with the valve box valve seat and the swinging of the valve body stops, the valve body becomes the fully closed position and the scraping by the first and second scraping members ends. Next, when the valve stem is rotated from the fully closed position of the valve body in the valve body opening direction, that is, in the opposite direction to that described above, the valve body, guide shaft, swinging member, and connecting lever are operated in the opposite direction to that described above. The first and second scraping members slide in the opposite direction and similarly scrape off the dust and the like adhering to both valve seats, respectively.

Since the present invention is constructed and operates as described above, it produces the following effects. In other words, it is possible to clean not only the valve seat of the valve body but also the valve seat of the valve body, and when the valve body is closed, both valve seats can be brought into close contact. The flow of fluid can be completely shut off, and both valve seats are not damaged by dirt or dust adhesion, so it is possible to maintain a long service life and maintain perfect airtightness. Further, since a pressurizing device or supply piping for the cleaning fluid is not required, equipment costs and maintenance costs are low, and the structure is simple and easy to manufacture.

An embodiment of the present invention will be described below with reference to the drawings.

The drawing shows an example in which the present invention is applied to a swing type valve connected to a waste transportation pipeline. In the figure, 1 is a valve box installed in a vertical pipe, 2 is a valve stem that is supported through the valve box 1, and 3 is fixed to the inside of the valve box of the valve stem 2 via an arm 4. The valve body 3 is a rectangular valve body, which swings upward by rotating the valve stem 2, and has a truncated conical shape provided at the valve body inlet 5 so as to protrude toward the inside of the valve body. It is positioned so as to be able to come into contact with the valve port pipe 6 to close the valve port 7, and by rotating the valve stem 2 in the opposite direction from this position, it swings downward and opens the valve port 7. ing. 8 is a pin for attaching the valve body 3 to the arm 4.

The valve port 7 of the valve port pipe 6 has a valve box valve seat 9 on its outer periphery.
is fixed, and this valve box valve seat 9 is provided with a square guide flange 10 on the outer peripheral edge.

A scraping member 11 is disposed on the guide flange 10 so as to be slidable up and down, and scrapes off dirt and dust adhering to the surface of the valve box valve seat 9.
As shown in FIGS. 4 and 5, the scraping member 11 has side plates 12 bent upward at right angles on both sides thereof, and a gap slightly larger than the thickness of the valve box valve seat 9 is created inside the side plates 12. Two rollers 13 and 13' are arranged so as to be located on the upper surface of the guide flange 10, and a roller 14 is arranged below the rollers 13 and 13' so as to be located on the lower surface of the guide flange 10. A shielding plate 15 is installed between the roller 14 and the valve seat 9 of the valve box.
has been established.

A valve seat 16 is embedded in the outer peripheral edge of the inlet side of the valve body 3 that contacts the valve box seat 9 so as to be flush with the upper surface of the valve body 3. A scraping member 1 is attached to the valve body 3.
7 are arranged to be able to freely slide up and down, and are designed to scrape off dirt and dust adhering to the surface of the valve body valve seat 16. As shown in FIG. 6, the scraping member 17 has a side plate 18 bent downward at a right angle on both sides thereof, and is connected with the scraping member 17, with a gap slightly larger than the thickness of the valve body 3 being formed on the inside of the side plate 18. Roller 19, 19'
A roller 20 is disposed coaxially with the roller 19' on the outside.

A guide shaft 21 is supported in the valve body 1 on the back side of the valve body in parallel with the valve rod 2. A base end of a substantially L-shaped guide lever 22 is pivotally supported at both ends of the guide shaft 21, and a guide groove 23 is formed at the tip of one arm of the guide lever 22, and this groove is connected to the roller 20. is slidably engaged with. Guide lever 2
The proximal end of a connecting lever 24 is pivotally supported at the tip of the other arm of 2, and the tip of the connecting lever 24 is attached to a pin 25 coaxially attached to the roller 13 on the outside of the side plate 12 of the scraping member 11. is connected to. Therefore, the guide lever 22 is opened and closed by the opening and closing operation of the valve body 3.
swings around the guide shaft 21, and the connecting lever 24 also moves following the swing of the guide lever 22, so the scraping member 17 scrapes along the surface of the valve seat 16. The member 11 will simultaneously slide up and down along the surface of the valve box valve seat 9.

As shown in FIGS. 2 and 7, a scraping lever 26 is fixed to one end of the guide shaft 21 passing through the valve box 1, and this lever 26 is equipped with a weight 27 and a roller 28 for applying downward rotational force. installed. Furthermore, an operating lever 29 is provided at one end of the valve stem 2 that has passed through the valve body 1, corresponding to the scraping lever 26.
is fixed, and this lever 29 has a long groove 3 at its lower end.
0 is formed, and a guide bar 31 which is slidably engaged with the roller 28 through this groove is telescopically supported by a screw. A counterweight 32 is fixed to the tip of the operating lever 29. Additionally, 33 in FIG. 2 is a sprocket fixed to the other end of the valve stem 2, and is connected to a drive device (not shown). Further, 34 is a stopper attached to the bracket of the valve box 1 to prevent the downward rotation of the scraping lever 26, 35 is a stopper of the scraping member 17 attached to the lower end of the valve body 3 in FIG. The stopper of the scraping member 11 attached to the lower end of the guide flange 10, 37 in FIG. 1 is a valve box outlet.

Next, the operation of the above embodiment will be explained.

When the valve stem 2 is rotated from the valve body fully open position shown in FIG. 1 in the valve body closing direction via the sprocket 33, the valve body 3 gradually swings upward. At the same time, valve stem 2
The actuating lever 29 fixed to is also rotated, and the actuating lever 29 moves the guide bar 31 downward, and the actuating lever 29 moves the guide bar 31 downward.
1 and the scraping lever 26 engaged with the roller 28 are also moved around the guide shaft 21 by the action of the weight 27.
It rotates to a position where it comes into contact with the stopper 34 shown by the imaginary line in the figure. Along with this rotation, the guide lever 22 fixed to the guide shaft 21 also swings upward in accordance with the upward movement of the valve body 3 so that the roller 20 slides in the guide groove 23. The roller 2 is inserted into the long groove 23 formed at the tip of one arm of the
The scraping member 17 engaged with the rollers 19 and 1
9' runs on the back surface of the valve body 3 and slides from the bottom to the top of the valve body 3, and scrapes off dust and the like adhering to the surface of the valve seat 16 during this sliding movement. On the other hand, since the connecting lever 24 also moves upward due to the swinging of the guide lever, the scraping member 11 connected to the tip of the connecting lever 24 by the pin 25 also moves the rollers 13 and 13' onto the guide flange 10. A roller 14 runs along the upper surface and the lower surface and slides from below to above the guide flange 10, and scrapes off dust and the like adhering to the surface of the valve box valve seat 9 during this sliding movement.
When the scraping lever 26 comes into contact with the stopper 34, both scraping members 17,
11 are respectively stopped at the upper ends of the valve body 3 and the guide flange 10, the valve body valve seat 16 and the valve body valve seat 9 are in close contact with each other, and the valve body 3 closes the valve port 7 of the valve port pipe 6. becomes. At this time, the scraping member 11 is located above the scraping member 17, and the two members do not come into contact with each other.

Next, when the valve stem 2 is rotated in the opposite direction from the above through the sprocket 33 from this valve body fully closed position, the valve body 3
gradually swings downward to open the valve port 7. At the same time, the actuating lever 29 also rotates in the opposite direction, and the actuating lever 29 moves the guide bar 31 upward.
The scraping lever 26, which is engaged with the roller 28, is also reversely rotated about the guide shaft 21 to its original position shown by the solid line in FIG. Along with this rotation, the guide lever 22 fixed to the guide shaft 21 also moves into the guide groove 2.
3, the roller 20 slides downward as the valve body 3 moves downward, so the scraping member 17 slides from above to below the valve body 3, and during this sliding. Scrape off any dust or dirt adhering to the surface of the valve body valve seat 16. On the other hand, as the guide lever 22 swings, the connecting lever 24 also moves downward.
The scraping member 11 slides from above to below the guide flange 10, and scrapes off dust and the like adhering to the surface of the valve box valve seat 9 during this sliding movement. Then, the scraping member 17 and the scraping member 11 contact the stopper 35 with the side plate 12 and stop, respectively, and the guide lever 22 also engages the roller 28 with the lower end of the long groove 30 of the guide bar 31, Actuation lever 2
9 and the valve stem 2 are prevented from further rotation, and the valve body 3 fully opens the valve port 7. As described above, by opening and closing the valve body 3 once, both the valve body valve seat 9 and the valve body valve seat 16 are cleaned twice.

Although the above embodiment describes a swing type valve connected to a vertical pipe, it goes without saying that the present invention is not limited to this and can also be applied to a horizontal pipe, for example, a fluid pipe containing dust. Of course, the detailed design of the present invention can be changed as appropriate.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal side view of one embodiment of the present invention, FIG. 2 is a longitudinal rear view, and FIG. 3 is an enlarged sectional view of main parts.
FIG. 4 is an enlarged side view of the scraping member 11, FIG. 5 is a front view taken along the line - in FIG. 4, and FIG. 6 is a side view of the scraping member 17. , FIG. 7 is a side view showing a connecting member between the valve stem and the guide shaft. DESCRIPTION OF SYMBOLS 1... Valve box, 2... Valve stem, 3... Valve body, 5... Valve box inlet, 9... Valve box valve seat, 10... Guide flange, 11
... scraping member, 16... valve body valve seat, 17... scraping member, 21... guide shaft, 22... guide lever.

Claims (1)

[Claims] 1 A valve in which a rotary valve stem is pivotally supported through a valve body, a valve body is provided in the interior of the valve body, and this valve body is swung by the valve body and provided at the inlet of the valve body. In a swing type valve configured so that a valve body valve seat can be positioned in contact with a box valve seat, a guide flange is provided on the outer peripheral edge of the valve box valve seat, and a guide flange is provided with a guide flange on the surface of the valve box valve seat. a first scraping member slidable along the valve body; a second scraping member slidable along the valve body; a second scraping member slidable along the valve seat; A guide shaft is rotatably provided, and the base end of a bifurcated swinging member that swings as the valve body opens and closes is fixed to the guide shaft, and one arm of the swinging member is fixed to the guide shaft. The proximal end of the connecting lever is pivoted to the distal end,
The distal end of this connecting lever is engaged with the first scraping member, and the distal end of the other arm of the swinging member is engaged with the second scraping member.
A swing type valve, which is engaged with a scraping member and connects the guide shaft and the valve stem through a connecting member such that the guide shaft rotates in the same direction as the valve stem rotates. Seat cleaning device.