JP3429249B2 - Eccentric structure valve - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an eccentric structure valve which is interposed in a fluid passage and used for opening and closing the passage.

[0002]

2. Description of the Related Art Conventionally, an eccentric structure valve used for sewers has been known. This eccentric structure valve is suitable for fluids containing foreign matter such as soil and sludge, and is used for sludge drawing pipes in water purification plants and sewage treatment plants.

A known eccentric structure valve, as shown in FIG.
An upper opening valve box 3 having an inflow port 1 at one end and an outflow port 2 at the other end, a lid 5 for opening and closing the upper opening 4 of the valve box 3, and a swirl inside the valve box 3. A valve body 6 for closing and opening the outlet 2; and an upper shaft means 9 and a lower shaft means 10 provided on the upper and lower arm portions 7 and 8 of the valve body 6 and defining the pivot axis of the valve body 6, The lower shaft means 10 is rotatably supported by the bearing at the bottom of the valve box, and the upper shaft means 9 is rotatably supported by the bearing of the lid body 5. A fluid pipe is connected to the flange 1a of the inflow port 1 and the flange 2a of the outflow port 2. Therefore, the extension shaft portion 9a of the upper shaft means 9 is manually rotated via a handle or the like, or the upper shaft means 9 is rotated by an electric or pneumatic actuator 11 to rotate the valve body 6. By doing so, the outlet 2 is opened and closed. At this time, the pivot axis of the valve body 6 defined by the upper shaft means 9 and the lower shaft means 10 is slightly eccentric from the center of the valve box 3, and the valve body 6 is in close contact with the outlet 2 when fully closed. On the other hand, when fully opened, the valve element 6 is retracted to the side surface inside the valve box 3 so as not to obstruct the flow path of the fluid containing foreign matters such as earth and sand and dirt.

[0004]

By the way, the eccentric structure valve requires maintenance for internal inspection, cleaning, and the like. In this case, the valve body 3 can be removed by removing the lid 5.
The upper opening 4 is opened, the valve body 6 is taken out from the valve box 3, and after the desired work is completed, the valve body 6 is inserted into the valve box 3 again, the lid 5 is attached, and the upper opening 4 is formed. I will cover it.

However, in the conventional structure, the lid 5
Although the removal work and the removal work of the valve body 6 can be performed relatively easily, the insertion work of the valve body 6 and the attachment work of the lid body 5 are extremely difficult. In particular, the lid body 5 is fixedly attached to the valve box 3 by bolting, and the clearance is adjusted to position the upper shaft means 9 at the pivot axis.
When it is determined that the upper shaft means 9 is not located at the desired pivot axis after the lid 5 is attached, the bolts of the lid 5 are loosened again to adjust the clearance, and the work is performed. It is extremely complicated. Further, when the lid body 5 is attached to the valve box 3, since the upper opening 4 of the valve box 3 is simultaneously covered with the lid body 5, the internal state of the valve box 3 cannot be visually recognized, and the valve body 6 is installed in the correct posture. The work is made even more difficult because it cannot be confirmed whether or not it is present. Due to the structure of the eccentric structure valve, if the upper shaft means 9 of the valve body 6 is used in a state where the upper shaft means 9 is not positioned at a predetermined swivel axis, a serious problem is that the desired function cannot be achieved. Cause

[0006]

SUMMARY OF THE INVENTION In view of the above problems, the present invention takes out the work when the valve body is taken out from the valve box for maintenance or the like, and then the valve body is inserted and installed in the valve box again. This is to provide an eccentric structure valve in which the axial means of the valve element can be easily positioned on a predetermined pivot axis and the mounting state of the valve element can be easily checked. is there.

Therefore, the present invention is configured as a means, that is, a valve box having an upper opening having an inflow port at one end and an outflow port at the other end, and a lid body for opening and closing the upper opening of the valve box. A valve body that is swung inside the valve box to open and close the outlet, an upper shaft means and a lower shaft means that are provided in the upper and lower arm portions of the valve body and that define the swivel axis of the valve body. In an eccentric structure valve in which the shaft means is pivotally supported on the bottom of the valve box and the upper shaft means is inserted into the lid body, a bearing unit for pivotally supporting the upper shaft means is provided inside the lid body, and the bearing unit is used as a valve. It is detachably attached to a support seat formed on the inner peripheral portion of the upper opening of the box, and a centering means for positioning the upper shaft means to the pivot axis of the valve body is provided between the bearing unit and the support seat. .

The centering means preferably comprises a receiving surface provided on the support seat and a contact surface provided on the bearing unit so as to contact the receiving surface. The receiving surface and the contact surface are An arc surface is formed along a circle drawn around the turning axis of the valve body.

The bearing unit is preferably composed of bridge-shaped support plates which are installed across the upper opening of the valve box. The bearing units are located on both sides of the support plate to form a working opening by the upper openings of the valve box. Form.

The bearing unit comprises a support plate removably attached to the support seat of the valve box, and a bearing plate removably attached to the central portion of the support plate and pivotally supporting the upper shaft means. Preferably, centering means is provided between the support plate and the support seat of the valve box, and centering complementing means is provided between the bearing plate and the support plate.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a vertical cross-sectional view of an eccentric structure valve according to an embodiment of the present invention, and FIG. 2 is a plan view with a lid body removed.

The eccentric structure valve has an upper opening valve box 23 having an inflow port 21 at one end and an outflow port 22 at the other end, and a valve box 2
A lid body 25 that opens and closes the upper opening 24 of the valve 3, a valve body 26 that is swung inside the valve box 23 to open and close the outlet 22, and upper and lower arm portions 27 and 28 of the valve body 26. Upper shaft means 29 for defining the turning axis AX of the valve body 26
And a lower shaft means 30. The upper shaft means 29 is
A boss portion 29a provided on the upper arm 27 and an upper shaft shaft 29 inserted into the boss portion 29a so as not to rotate relative to each other.
The upper shaft shaft 29b is inserted into the lid 25. The lower shaft means 30 is composed of a boss portion 30a provided on the lower arm 28 and a lower shaft shaft 30b inserted into the boss portion 30a, and the lower shaft shaft 30b is attached to the bottom of the valve box. . The flange 21a of the inflow port 21 and the flange 22 of the outflow port 22
A fluid pipe is connected to a.

Upper shaft shaft 29b of the upper shaft means 29
Is inserted from the lid body 25 and extended upward, and the extension shaft portion is manually rotated through a handle or the like, or when it is rotated by an electric or pneumatic actuator, the valve body 26 becomes It is rotated together with the upper arm 27 via a boss portion 29a integrated with the upper shaft 29b. At this time, the lower arm 28 attaches the boss 30a to the lower shaft 3
It is made to rotate around 0b. As a result, the valve body 26
Is swung around the swivel axis AX, and the outlet 22 is opened and closed. At the inner peripheral edge of the outlet 22 and the outer peripheral edge of the valve body 26 that are abutted against each other when closed, valve seats 31a and 31b of metal sheet type or elastic rubber sheet type are provided for making close contact or close contact. Has been.

The pivot axis AX of the valve body 26 defined by the upper shaft means 29 and the lower shaft means 30 is slightly eccentric from the center of the valve box 23, and when fully closed as shown in FIG. The valve seat 31b of No. 26 is brought into close contact with the valve seat 31a of the outflow port 22, while the valve body 26 is moved from the fully closed state to about 9
When the valve body 26 is fully opened by turning it by 0 degree, the valve body 26 is retracted to the side surface inside the valve box 23. The above configuration is the same as that of the conventional eccentric structure valve described with reference to FIG.

A support seat 32 is formed inside the lid 25 so as to project inward from the inner peripheral edge of the upper opening 24 of the valve box 23. The bearing seat 33 is supported by the support seat 32 and the bolts are supported. It is detachably attached by 34. The bearing unit 33 is composed of a support plate 35 that is detachably attached to the support seat 32, and a bearing plate 36 that is detachably attached to the central portion of the support plate 35. The bearing plate 36 serves to support the upper shaft means 29. It is rotatably supported. In the case of the illustrated example, the small diameter portion of the boss portion 29a is rotatably inserted into the central hole of the bearing plate 36, and a sealing means 37 such as an O-ring is provided inside the central hole between the bearing plate 36 and the upper shaft shaft 29b. Although the configuration is shown as being interposed, the configuration is not limited to this.

Support plate 35 which constitutes the bearing unit 33
2 is formed in a bridge shape across the upper opening 24 of the valve box 23, as shown in FIG. Therefore,
With the support plate 35 attached to the support seat 32, the upper opening 2
4 has working openings 38 located on both sides of the support plate 35, which are not closed and remain open. Therefore, the upper opening 2
4, a pair of support seats 32, 32 are formed in the diametrical direction, and both ends of the support plate 35 are mounted on the support seats 32, 32, and are fixed by bolts 34. .

Between the support plate 35 which constitutes the bearing unit 33 and the support seats 32, 32, there is provided centering means 39 for positioning the upper shaft means 29 at the pivot axis AX. The centering means 39 is composed of a receiving surface 32b standing upright from the supporting surface 32a of the supporting seat 32, and a contact surface 35a provided on both end edges of the supporting plate 35 so as to be in close contact with the receiving surface 32b. As shown in FIG. 2, the circle 32b and the contact surface 35a are circles C drawn around the turning axis AX.
An arc surface is formed along (shown by a chain line in FIG. 2). Therefore, when the bolt 34 is inserted into the bolt hole of the support plate 35 and screwed into the screw hole of the support seat 32, the support plate 35 has a clearance with respect to the bolt 34 through the bolt hole,
Since the contact surface 35a is tightly fitted to the receiving surface 32b, there is almost no clearance between the support plate 35 and the support seat 32 for positioning.

In the bearing unit 33, the bearing plate 36
Is inserted into the recess 40 of the support plate 35 and the bolt 4
It is detachably attached by 1. The outer circumference of the bearing plate 36 and the inner circumference of the recess 40 are formed in a circular shape centering on the turning axis AX, but by forming a minute clearance in which the bearing plate 36 can float inside the recess 40, centering is performed. Complementing means 42 is configured. Therefore, by finely moving the bearing plate 36 inside the recess 40 before tightening the bolts 41, it is possible to adjust the position of the upper shaft means 29 so as to accurately coincide with the turning axis AX.

According to the above structure, the eccentric structure valve mounts the bearing unit 33 on the support seat 3 at the time of factory shipment or on-site installation.
In the state in which the lower shaft means 3 is attached to the lower shaft means 3, the centering complementing means 42 adjusts the position of the bearing plate 36 with respect to the support plate 35.
With 0, the positioning adjustment can be performed so that the upper shaft means 29 exactly coincides with the turning axis AX. This adjustment work is performed with the lid 25 removed, but the valve box 23
Since the work opening 38 is provided in the upper opening 24 of the, the operator can easily perform the work while visually observing the inside of the valve box 23.

In this way, the eccentric structure valve has the shaft means 2
Since 9 and 30 are made to coincide with the turning axis AX, the upper opening 24 is covered with a lid 25 and installed and used for a desired purpose by a conventional method, but the inside is inspected for maintenance and the like. When it becomes necessary to do so, the lid 25 is removed and the work is performed. Although not shown, the lid 25 is attached to the top of the valve box 23 by bolts, and can be easily attached and detached only by removing and inserting the bolts.
Then, when the lid 25 is removed, the working opening 38 appears, so that the inside of the valve box 23 can be easily inspected while the valve body 23 is axially supported by the bearing unit 33. If there is no abnormality inside and it is not necessary to take out the valve body 26 from the valve box 23, the lid body 25 can be attached again as it is, so that a simple and quick inspection can be performed.

By the way, when it is necessary to take out the valve element 26 from the valve box 23, the bolt 34 is removed so that the bearing means 36 supporting the upper shaft means 29 remains attached to the support plate 35. , The valve unit 2 together with the bearing unit 33
6 should be taken out from the valve box 23. Then, after the predetermined work such as internal inspection or cleaning of the valve box 23 is completed, the valve element 26 may be inserted into the valve box 23 together with the bearing unit 33.

At the time of this insertion, since the working opening 38 is provided with the bearing unit 33 facing the upper opening 24, the inside of the valve box 23 can be visually checked and the fingers can be inserted. The shaft means 30 can be easily assembled.

Further, the bearing unit 33 can be mounted by simply inserting the contact surface 35a of the support plate 35 into the receiving surface 32b of the support seat 32 and returning it to its original position by the centering means 39 formed between the two surfaces. Since the positioning is ensured, no adjustment work is required for aligning the upper shaft means 29 with the pivot axis AX when the support plate 35 is mounted and fixed to the support surface 32a of the mounting seat 32 with the bolts 34. That is, in the mutual relation between the bearing unit 33 and the valve body 26, the upper shaft means 29 is previously aligned with the turning axis AX via the centering complementing means 42, and the bearing unit 33 and the valve box 23 are mutually opposed. In the above, since the predetermined positioning relationship is formed by the centering means 39, when the assembly of the bearing unit 33 and the valve element 26 taken out from the valve box 23 is inserted into the valve box 23 again, the contact surface of the support plate 35 is 35a support seat 32
If it is simply fitted into the receiving surface 32b of the upper shaft means 2
9 is made to coincide with the turning axis AX.

[0024]

According to the present invention as set forth in claims 1 and 2, the eccentric structure valve is provided with a bearing unit 33 for supporting the upper shaft means 29 of the valve body 26 inside the lid body 25, and the bearing unit 33 is provided. The unit 33 is detachably attached to a support seat 32 formed in the inner peripheral portion of the upper opening 24 of the valve box 23, and the upper shaft means 29 is provided between the bearing unit 33 and the support seat 32 at the turning axis AX of the valve body 26. Since the centering means 39 for positioning is provided, the valve element 26 is taken out from the valve box 23 and is again attached.
When inserting the valve into the valve box 23, the work is extremely easy, and in particular, the upper shaft means 29 of the valve body 26 is automatically positioned along the predetermined turning axis AX.

According to the present invention of claim 3,
The bearing unit 33 is composed of a bridge-shaped support plate 35 that is installed across the upper opening 24 of the valve box 23. The bearing unit 33 is located on both sides of the support plate 35, and the work opening 38 is formed by the upper opening 24 of the valve box 23. Valve box 23 because it is configured to form
When the lid 25 is removed from the valve body 26, the inside of the valve box 23 can be inspected while the valve body 26 is still pivotally supported by the bearing unit 33. Moreover, even when the valve element 26 taken out from the valve box 23 is inserted into the valve box 23 again, the working opening 38 is provided with the bearing unit 33 assembled to the valve element 26 facing the upper opening 24. Therefore, the attitude control of the valve element 26 inside the valve box 23 can be easily performed, and the workability is improved.

Further, according to the present invention described in claim 4,
Since the centering complementing means 42 is provided between the bearing plate 36 and the support plate 35 that form the bearing unit 33, the initial axial alignment between the valve body 26 and the bearing unit 33 can be performed accurately. Since there is no need for subsequent axis alignment, there is an effect that the work can be facilitated.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an eccentric structure valve according to an embodiment of the present invention.

FIG. 2 is a plan view showing a state in which a lid is removed.

FIG. 3 is a perspective view showing a partially broken view of an eccentric structure valve according to a conventional example.

[Explanation of symbols]

21 Inlet 22 Outlet 23 valve box 24 Upper opening 25 Lid 26 valve body 27 Upper arm 28 Lower arm 29 Upper shaft means 30 Lower shaft means 32 Support seat 32a support surface 32b receiving surface 33 Bearing unit 35 Support plate 35a contact surface 36 bearing plate 38 Working opening 39 Centering means 42 Centering Complementary Means

Front page continued (58) Fields surveyed (Int.Cl. ⁷ , DB name) F16K 27/00-27/12 F16K 1/16-1/226 F16K 5/00-5/20 F16K 3/22

Claims (4)

(57) [Claims] 1. An inflow port 21 is provided at one end and an outflow port 2 is provided at the other end.
2, an upper opening valve box 23, a lid body 24 that opens and closes the upper opening 24 of the valve box 23, and a valve body 26 that is swung inside the valve box 23 to open and close the outlet 22. Provided on the upper and lower arm portions 27 and 28 of the valve body 26,
An eccentric structure including an upper shaft means 29 and a lower shaft means 30 for defining a turning axis AX of the lower shaft means 30, the lower shaft means 30 being pivotally supported on the bottom of the valve box, and the upper shaft means 29 being inserted into the lid 25. In the valve, a bearing unit 33 that pivotally supports the upper shaft means 29 is provided inside the lid 25, and the bearing unit 33 is detachably attached to a support seat 32 formed in the inner peripheral portion of the upper opening 24 of the valve box 23. , The upper shaft means 2 between the bearing unit 33 and the support seat 32.
An eccentric structure valve characterized in that centering means 39 for positioning 9 at the turning axis AX of the valve body 26 is provided. 2. The centering means 39 comprises a receiving surface 32b provided upright on the support seat 32, and a contact surface 35a provided on the bearing unit 33 so as to abut the receiving surface 32b. 32b and the contact surface 35a, the valve body 26
The eccentric structure valve according to claim 1, wherein the eccentric structure valve is formed by forming an arc surface along a circle drawn around the turning axis AX of FIG. 3. The bearing unit 33 is composed of a bridge-shaped support plate 35 which is installed across the upper opening 24 of the valve box 23, and is located on both sides of the support plate 35 and the upper opening of the valve box 23. The eccentric structure valve according to claim 1 or 2, wherein a working opening is formed by 24. 4. The bearing unit 33 is detachably attached to the support seat 32 of the valve box 23, and is detachably attached to the central portion of the support plate 35 and pivotally supports the upper shaft means 29. Bearing plate 36 and supporting plate 3
5 and centering means 39 between the support seat 32 of the valve box 23, and centering complementing means 4 between the bearing plate 36 and the support plate 35.
The eccentric structure valve according to claim 1, 2 or 3, wherein the eccentric structure valve is provided.