JPH08121613A - Butterfly valve - Google Patents

Abstract

PURPOSE: To shorten the assembly time and improve the quality by setting the dimension between the end faces of a metal piece smaller than the dimension between the side faces of a valve seat ring by the amount where an elastic body is compressed, and providing a compression metering device to which a clamp is fitted to set the operating force to open/close a valve in a condition reasonably suitable for the fluid. CONSTITUTION: The length between the end faces of a metal piece 9 of round rod shape is the length between the end faces of a valve seat ring side face 19 minus the length equivalent to the compression amount of rubber. The metal piece 9 of round rod shape is inserted between the outer diameter surface and the inner diameter surface of the valve seat ring 6 in an attachable/detachable manner. When clamps 7, 8 are fitted and tightened, the inclined surface 24 and the inclined surface 23 which are provided on a clamp inner diameter part and a valve box flange part 18 are abutted and slid to allow the contact surface 17 of the valve box presses the valve seat ring side face 19, and the end face of the metal piece 9 is abutted on the contact surface 17 of the valve box. Thus, the adjustment such as correction and renewal can be facilitated by the metal piece 9 which is attachable/detachable to set the withstanding pressure of a valve and the bearing pressure required for the valve seat surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sanitary specification pipe for beverages, dairy products, pharmaceutical products, etc., or a butterfly valve used for fluid control of a powder / granule mixing tank or related pipes. Is.

[0002]

2. Description of the Related Art In a conventional butterfly valve, the connection end with the pipe of the valve box is integrated, and for example, a flange type, a flange connection wafer type, a ferrule joint type, a screw type,
It was difficult to separate the valve box from the joint, because it was specified as a butt weld type. Also, all parts that come into contact with fluid, such as the sanitary valve box, valve body, and valve seat ring, are regularly disassembled, cleaned, and reassembled, but they require special technology and are easy to perform. There wasn't.

[0003]

A valve used in a sanitary relationship is required to have a structure in which the fluid is rectified and there is no liquid pool in the valve bore. Further, the valve is regularly disassembled, inspected, washed and That is, the reassembly can be surely restored. Therefore, the technical problem to be solved by the present invention is that the pipe connection end and the valve box can be easily separated. Also,
When disassembling and reassembling each part, the structure is such that it can be disassembled without using a special tool, and the horizontal and vertical axes of the valve are automatically retained. Furthermore, since the pressure resistance of the valve and the airtightness of the valve seat surface are maintained, a certain surface pressure is generated on the contact surface of the elastic valve seat ring, and the quality is guaranteed.

[0004]

In order to achieve the above object, the butterfly valve of the present invention has a valve box which is divided into left and right parts to have a straight pipe type and one end of which has a pipe side joint type. The flange is formed into a combined shape, and the other end is provided with a flange portion having a contact surface for receiving the valve seat ring inside the valve, and a so-called hub shape having a sloped surface at the back portion of the flange portion. In addition, on the inner diameter side of the vertically divided clamp, a slope part is provided for the slope of the valve box collar part, and both sides are slidably contacted by tightening the clamp so that both contact surfaces of the valve box form the valve seat ring. The mechanism that compresses the valve box and valve seat ring is used.

Further, a plurality of arc-shaped plate-like metal fittings are inscribed on the outer diameter surface of the valve seat ring, or a plurality of round bar-shaped metal fittings are arranged on the outer diameter surface of the valve seat ring. It is inserted in parallel with the horizontal axis between the inner diameter surface and the inner diameter surface, and both are detachably arranged. Since this elastic valve seat ring is sandwiched between the contact surfaces of the valve box and a predetermined surface pressure is generated between the contact surfaces, the length between the end surfaces of the metal fittings is adjusted to the size of compression depending on the pressure class. A compression amount sizing device is configured in which the elastic body is compressed until the end surface of the metal fitting is abutted against and fixed to the contact surface of the valve box.

Further, a plurality of round bar-shaped metal fittings having a length protruding from the side surface portion of the valve seat ring are detachably fixed between the outer diameter surface and the inner diameter surface of the valve seat ring. Then, a circular hole is provided on the contact surface of the valve box that receives the valve seat ring at a position facing the metal fitting, and the protruding portion of the metal fitting is fitted into the circular hole and engaged. As a result, the valve box, valve body, valve seat ring, and
The clamps are assembled to form a center of gravity between the divided valve boxes and a device for preventing twisting.

[0007]

The dimension between the end faces of the metal fitting for keeping the amount of compression between the contact faces of the elastic valve seat ring constant is set systematically by the compression allowance corresponding to the pressure class of the valve. Further, since the metal fitting is closely attached to the valve seat ring and is detachably attached, it is easy to change the set value.

The caliber of the valve box is a straight tube type in which the fluid is a direct current,
One end is fitted to the joint shape of the pipe, the other end is provided with a collar portion, and a sloping surface is formed on the contact surface for receiving the valve seat ring and the back surface,
It is a so-called hub type. In addition, on the inner diameter side of the divided clamp, a sloped part is provided at a position corresponding to the hub shape of the valve box. A force for compressing the elastic body of the valve seat ring is generated on the contact surface of the valve box provided by tightening the screw.

Further, due to the tightening of the clamp, the end surface of the rigid metal member comes into contact with the contact surface of the valve box, and at this position, a planned surface pressure is generated on each contact surface of the elastic body. This valve box,
The valve body, the valve seat ring, and the clamp constitute a compression amount sizing device, and each part is fixedly assembled.

Further, a plurality of rigid rod-shaped metal fittings having a length protruding from both side surfaces of the valve seat ring are prepared, and the metal fittings are attached to the elastic body portion of the valve seat ring so as to be detachable. Also,
A plurality of circular holes are also provided on the contact surface of the valve box, which receives the valve seat ring, at a position where it is concentric with the metal fitting.

Next, the valve shaft with the valve element is penetrated into the shaft hole of the valve seat ring, and the metal fitting is fitted into the circular hole on the contact surface of the valve box to be attached and further clamped. By fixing and fixing the parts, a device that automatically keeps the center of each part and prevents twisting of both valve boxes is constructed and assembled.

[0012]

EXAMPLES Examples will be described with reference to the drawings.
FIG. 1 is an assembly view of an embodiment of the present invention when a valve is open, and is a cross-sectional view taken along the line AA of FIG. 4, in which the pair of valve boxes 1 and 2 have a straight pipe shape and pipes. The side connection end is a ferrule joint type, and the flange 18 at the other end is provided with a contact surface 17 for receiving the valve seat ring 6 and a ring-shaped recess 13 having a semicircular cross section. Further, the valve body and the valve shaft are integrally molded, or integrated by welding, or the shaft portion is joined by a corner or a spline shaft and a hole. The valve seat ring 6 is formed of synthetic rubber, and is assembled by penetrating the valve shaft with the valve body in the valve shaft hole. A convex portion 12 is provided on the side surface of the valve seat ring, and the convex portion 12 is fitted into the concave portion 13 of the valve box contact surface so that the valve box contact surface 17 and the valve seat ring side surface 19 abut. In addition, a plurality of stainless steel parallel pins serving as round bar-shaped metal fittings 9 are detachably inserted between the outer diameter surface and the inner diameter surface of the valve seat ring. Next, the clamps 7 and 8 are fitted and tightened. The inner diameter portion of the clamp and the slope 24 and the slope 23 provided on the flange portion of the valve box are brought into contact with each other and slid, and both contact surfaces of the valve box press-contact the side surfaces of the valve seat ring, and the end surface of the metal fitting 9 is attached to the valve box. Tighten until it touches both contact surfaces. As a result, the valve box, the valve seat ring, the valve body and the clamp are fixed and assembled.

FIG. 2 shows that, instead of the round bar-shaped metal fitting 9 inserted into the valve seat ring shown in FIG. 1, a plurality of stainless steel arc-shaped plates are brought into close contact with the outer diameter surface 20 of the valve seat ring. The metal fitting 10 is provided, and the end surface of the metal fitting is brought into contact with the contact surface of the valve box to be tightened. Further, it is an embodiment in which the connection end of the valve box with the pipe is butt-welded.

FIG. 3 is a sectional view of another portion in FIG. 1, in which the valve seat ring 6 is provided with a stainless steel parallel pin type metal fitting 1
1 is inserted. The length between the end faces of the parallel pin is set to a length protruding from the both side faces of the valve seat ring. In addition, a circular hole 15 is provided in the valve box contact surface 17 at a position facing the parallel pin, and concave and convex portions 12 and 13 are fitted and fixed. As a result, the divided valve box, valve body, valve seat ring and clamp are automatically assembled to prevent concentricity and twist.

FIG. 4 is an assembly drawing of an embodiment according to the present invention.
It is a side view which made a valve shaft center a longitudinal section at the time of valve opening in the state where a drive mechanism was removed. First, the short shaft 5 of the valve shaft with the valve body 3,
Next, the long shaft 4 is inserted through the shaft hole of the valve seat ring 6 and assembled,
The valve seat ring is sandwiched between a pair of valve boxes 1 and 2. At this time, the convex portion 12 of the ring surface and the concave portion 13 of the valve box contact surface are fitted to each other to maintain the center.

FIG. 5 is a front assembly view when the valve is opened in FIG. 4, and a valve box and a valve are provided by tightening bolts, nuts 25 or eye bolts and wing nuts provided on the outer ears of the clamps 7, 8. The body, the seat ring and the clamp are each taut and fixed.

FIG. 6 is a front view of an embodiment of the valve seat ring 6 according to the present invention. The elastic body portion is made of synthetic rubber made of a material suitable for the fluid used and is formed in a ring shape. A plurality of through holes 21 are arranged parallel to the horizontal axis on both sides of the hole 16 for inserting the valve shaft. In the through hole, a plurality of stainless steel round bar-shaped metal fittings 9 with a constant amount of rubber compression are provided.
Is detachably inserted. Further, a plurality of stainless steel parallel pin-shaped metal fittings 11 are inserted and attached for the purpose of retaining the valve box and preventing twisting. The positions and number of the metal fittings are set in consideration of the size of the valve, the compressive strength of the material, and the like, and the arrangement shown in the figure is one example.

FIG. 7 is a vertical cross-sectional view taken along the line BB in FIG. 6, in which both side surfaces 19 of the valve seat ring have a recess 13 on the valve box contact surface.
A convex portion 12 that fits with and holds the center is provided. Further, a plurality of through holes 21 are arranged in parallel with the horizontal axis between the outer diameter surface 20 and the inner diameter surface 22.

FIG. 8 is an enlarged cross-sectional view of the portion of FIG. 7 in which the metal fitting is inserted into the through hole 21 of the valve seat ring. A parallel pin made of stainless steel is used as the round bar-shaped metal fitting 9, and the length L between the end faces of the parallel pin is longer than the length m between the end faces of the valve seat ring side surface 19 by a length α corresponding to the rubber compression amount. It is set to the size obtained by subtracting only that, that is, the number 1.

[Equation 1]

FIG. 9 is an enlarged sectional view of a portion of FIG. 8 in which another metal fitting is inserted into the through hole 21 of the valve seat ring.
A parallel pin 11 made of stainless steel is used as the metal fitting, and the length between the end faces of the parallel pin is set to a dimension projecting from the valve seat ring side surface 19, and the projecting portion is a circular hole 15 disposed in the valve box contact surface 17. Is fitted and fastened.

FIG. 10 is a front view of an embodiment of the valve boxes 1 and 2 according to the present invention, in which a ring-shaped semi-circular groove recess 13 and a plurality of circular holes 15 are provided on a contact surface 17. .

FIG. 11 is a side sectional view of FIG. 10, in which the connection end to the pipe is a butt-welded type, the other end is a collar portion 18, the contact surface 17 for receiving the valve seat ring 6 and the slope 23 on the rear surface.
Is provided.

FIG. 12 is a partially enlarged sectional view of the collar portion 18 in FIG. 11, in which the contact surface 17 is provided with a ring-shaped semi-circular groove and a circular hole 15 as the concave portion 13.

FIG. 13 is a three-dimensional view of the arcuate plate-shaped metal fitting 10 of FIG. 2 in which a stainless steel plate is formed into an arcuate shape.

[0025]

Since the present invention is constructed as described above, it has the following effects.

By providing the valve seat ring and the contact surface with a device for sizing the amount of compression of the elastic member, the pressure resistance of the valve and
When setting the surface pressure required to maintain the airtightness of the valve seat surface, it is now possible to easily make adjustments such as corrections and new adjustments with the detachable rigid metal fittings. Therefore, it is possible to set the conditions suitable for the fluid without excessive or insufficient operation force for opening and closing the valve.

A plurality of metal fittings protruding from both side surfaces of the valve seat ring are mounted, and a circular hole is provided in an end surface of the valve housing, and the metal fittings are fitted and engaged with each other to divide the valve housing. Since they are connected, the horizontal axis and vertical axis of the valve can be retained during assembly, and the twist generated from the piping side can be automatically prevented.

All the rigid metal fittings and parts of the above apparatus are detachably mounted, and all the parts are disassembled into individual parts.
In addition, since the inner diameter of the valve box is a straight pipe and the valve body and valve shaft are integrated, fluid does not stay and there is no liquid accumulation due to gaps, preventing contamination from microorganisms and other physics. Was done. Therefore, no special technical consideration was taken in the series of operations of disassembly-inspection-accurate cleaning-reassembly, which are sanitary conditions that are regularly performed, and the assembly time was shortened and the quality was improved.

[Brief description of drawings]

1 is an assembly view of a butterfly valve according to the present invention when the valve is open, and is a cross-sectional view taken along the line AA of FIG.

FIG. 2 is a cross-sectional view of another embodiment in FIG.

FIG. 3 is a cross-sectional view of another portion in FIG.

FIG. 4 is an assembly view of the embodiment according to the present invention, which is a side elevational cross-sectional view when the valve is open.

5 is a front assembly view in FIG. 4. FIG.

FIG. 6 is a front view of an embodiment of a valve seat ring according to the present invention.

FIG. 7 is a vertical sectional view taken along the line BB in FIG.

8 is a partially enlarged cross-sectional view of FIG.

9 is an enlarged cross-sectional view of another portion in FIG.

FIG. 10 is a front view of an embodiment of a valve box according to the present invention.

11 is a cross-sectional view of a side surface portion in FIG.

FIG. 12 is a partially enlarged cross-sectional view of the collar portion in FIG.

FIG. 13 is a three-dimensional view of an embodiment of the arcuate plate-shaped metal fitting 10 according to the present invention.

[Explanation of symbols]

 1 valve box 2 valve box 3 valve body 4 long axis 5 short axis 6 valve seat ring 7 clamp 8 clamp 9 round bar type metal fitting 10 arc-shaped metal plate-shaped metal fitting 11 parallel pin type metal fitting 12 valve seat ring side projection 13 Valve box contact surface recess 14 Valve box bore surface 15 Circular hole 16 Valve shaft hole 17 Valve box contact surface 18 Valve box flange 19 Side surface of valve seat ring 20 Outer diameter surface of valve seat ring 21 Valve seat ring Through hole 22 Inside diameter of valve seat ring 23 Slope of valve box collar 24 Slope of clamp inner diameter 25 Tightening bolts and nuts

Claims (3)

[Claims] 1. A valve box (1,) in which a valve shaft with a valve body (3) is attached to a shaft hole of a valve seat ring (6) made of an elastic body so as to penetrate therethrough, and the valve seat ring is divided. In the butterfly valve which is sandwiched by the contact surface (17) of 2), fitted with the clamps (7, 8), and opened and closed by the rotational displacement about the valve shaft, the valve box (1, 2) One end has a shape adapted to the joint shape on the pipe side, and the other end is provided with a flange portion (18) having a contact surface (17) for receiving a valve seat ring and a back surface with an inclined surface (23), Further, a slant surface (24) which comes into contact with and slides on the slant surface of the valve box collar portion is also provided on the inner diameter portion of the clamp (7, 8), and further, the outer diameter surface (20) of the valve seat ring. And a plurality of rigid rod-shaped metal fittings (9) between the inner surface and the inner diameter surface (22),
It is inserted in close contact with the elastic body of the valve seat ring, and the dimension between the end faces of the fitting is made smaller than the dimension between the side surfaces (19) of the valve seat ring by the amount by which the elastic body is compressed, and the clamp is fitted. Thus, the butterfly valve is provided with a compression amount sizing device for tightening the end surface of the metal fitting by contacting the contact surface of the valve box. 2. A plurality of rigid, arcuate plate-shaped metal fittings (10) are closely attached to the outer diameter surface (20) of the valve seat ring, and the dimension between the end surfaces of the metal fittings is determined by the side surface of the valve seat ring. (19) A compression amount sizing device in which the size is made smaller than the space size by the amount by which the elastic body is compressed, and the clamp is fitted so that the end surface of the metal fitting is brought into contact with the contact surface of the valve box and tightened. The butterfly valve according to claim 1, further comprising: 3. A plurality of rigid and parallel pin-shaped metal fittings (11) between the outer diameter surface (20) and the inner diameter surface (22) of the valve seat ring (6) are closely attached to the elastic body of the valve seat ring. And the end faces of the metal fittings are dimensioned so as to project from the side faces of the valve seat ring, and the contact surface (17) for receiving the valve seat ring of the valve box is
A plurality of circular holes (15) are provided, and a portion of the metal fitting projecting from the side surface of the valve seat ring is engaged with the circular hole, and the runout between the divided valve boxes (1, 2) and The butterfly valve according to claim 1, further comprising a device for preventing twisting.