JP2001065711A - Butterely valve for container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light butterfly valve for a container excellent in durability and easy to assemble, disassemble and wash. SOLUTION: In a butterfly valve having a main body 1 put the cylindrical half bodies with the same shape and size together in the axial direction symmetrically and put a band 2 around its outer periphery and a disc shape valve element 3 installed in the main body turnable and constituted by bearing the short shaft 13 projected from the one end side of the radial direction of the valve element 3 and the long shaft 14 projected from the other end side, penetrated the band 2 and installed a handle on its tip, to the main body 1 respectively, a cap shape bearing case 5 is installed attachably detachably in the opening 15 provided on the center of one end side of the radial direction of the main body 1. A Teflon resin slide bearing for bearing the short shaft 13 is installed in the bearing case 5 and a cylindrical bearing sleeve 6 is installed in the opening 16 provided on the center of the other end side. The Teflon resin slide bearing for bearing the long shaft 14 is installed in the bearing sleeve 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a butterfly valve provided at a discharge port of a hopper type container or the like for accommodating a powdery food material or a chemical material.

[0002]

2. Description of the Related Art A butterfly valve provided at a discharge port of a container or the like includes a cylindrical main body attached to the discharge port of a container or the like, and a disc-shaped valve body provided inside the main body. The body abuts two cylindrical halves of the same shape and the same size symmetrically in the axial direction, and integrates a band around the abutted outer peripheral center. A short axis portion protruding from one end side in the diameter direction of the valve body and a long axis portion protruding from the other end side are supported by a central portion on one end side and the other end side in the diameter direction of the main body. The long axis penetrates the band,
An operating handle or the like is connected to the tip.

In the conventional butterfly valve, only the long axis portion of the valve body is supported by two slide bearings made of Teflon resin or the like which are spaced apart in the axial direction. Therefore, the allowable pressure of the butterfly valve is increased to improve the durability. In such a case, the distance between the two bearings in the long shaft portion of the butterfly valve had to be increased. For this reason, it was not possible to reduce the size and weight of the butterfly valve having excellent durability.

[0004]

A variety of powdery raw materials are contained in a container, and each time the raw material changes, the butterfly valve is removed from the container and disassembled and washed. Normal,
Since the disassembly and cleaning of the butterfly valve is performed at least once a day, there has been a demand for a butterfly valve that is lightweight and easy to disassemble and assemble.

[0005] The present invention has been made in response to this demand, and an object thereof is to provide a butterfly valve having a high allowable pressure suitable for a hopper type container and the like, which is lightweight and easy to disassemble and assemble. It is in.

[0006]

In order to achieve the above-mentioned object, a means adopted by the present invention is to provide an opening at the center of one end and the other end in the diametrical direction of the butterfly valve body, and to provide an opening at the one end side. A bearing case for bearing the short shaft portion is detachably fitted with a bearing sleeve for bearing the long shaft portion in the opening at the other end side and fixed, and slide bearings such as Teflon resin are respectively provided on the inner peripheral surfaces of the bearing case and the bearing sleeve. Has been established.

[0007] Both openings of the main body have a rectangular cross section whose two sides are parallel to a plane including the axis of the main body and the valve body, and a portion that fits into the opening of the bearing case and the bearing sleeve is a rectangular parallelepiped that fits tightly. preferable. For example, the bearing case is a hat-shaped rectangular parallelepiped into which the short shaft part is inserted, the inside of the bearing sleeve is a cylindrical body through which the long shaft part penetrates, the lower part of the cylindrical body is a rectangular parallelepiped that fits exactly in the opening, and the upper part is a cylinder. Body.

The opening of the main body has a rectangular cross section having two sides parallel to the axes of the main body and the valve body, and a fixing pin is passed through the inner and outer surfaces of the bearing case, the bearing sleeve, and the opening which face each other. It is desirable to form concentric pin grooves. In the butterfly valve of the present invention, slide bearings made of Teflon resin or the like are provided on both the short shaft portion and the long shaft portion on both sides of the valve body, and the interval between the two slide bearings supporting the valve body is significantly increased. Compared with a conventional valve body provided only on one long axis portion, the durability is greatly increased, and the durability is improved. In addition, since the bearing sleeve accommodates only one slide bearing, the whole is compact and lightweight as compared with a conventional sleeve that accommodates two slide bearings.

Also, the two halves forming the main body are the same shape and the same size and have no direction in the combination. It becomes even easier.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A butterfly valve according to the present invention will be described based on an embodiment shown in the drawings. 1 and 2 are a front view and a plan view of the embodiment. The butterfly valve includes a main body 1 and a valve body 3, and the valve body 3 is provided inside the main body 1 so as to be able to rotate half a turn. The main body 1 has an opening 5 on one end side in the diameter direction, in the figure, on the lower end side, and has an opening 16 on the other end side, in the figure, on the upper end side. The bearing case 5 is fitted in the opening 15, and the bearing sleeve 6 is fitted in the opening 16 via the pins 17 and 20, and is fixed to the main body 1.

A short shaft portion 13 protrudes from one end of the disc-shaped valve element 3 in the diameter direction and enters the bearing case 5, and a long shaft portion 14 protrudes from the other end and penetrates the bearing sleeve 6. . The handle block 10 is detachably fixed to the tip of the long shaft portion 14 protruding from the bearing sleeve 6, and the handle lever 9 is attached to the handle block. The main body 1 is composed of semi-cylindrical halves 11 and 12 having the same shape and the same size butted symmetrically in the axial direction, and joined by a band 2 hung on the center of the outer periphery. The central part of the outer periphery of the main body 1 which is the abutting part of the halves 11, 12 projects in a mountain shape, and the cross-sectional V
Put the band 2 in the shape of a letter. Ferrules are formed on the outer peripheral surfaces of the halves 11 and 12 so as to fit the outlets of the containers.

The band 2 has a ring 23 for passing the bearing sleeve 6 at the center, a bolt 24 at one end, and a bolt 2 at the other end.
4 has a nut hook 26 for hooking a nut 25 fitted thereon. Tighten the nut 25 of the band 2 to fit the half 11,
12 are integrated into a main body 1. It is known to integrate the two halves of the butterfly valve body with such a band.

A liner 4 made of silicone rubber is attached to the center of the inner peripheral surface of the main body 1. The short axis portion 13 and the long axis portion 1 of the valve element 3
4 penetrates the liner 4. As shown in FIGS. 3 and 4, the opening 15 formed by the halves 11 and 12 of the main body 1 has a square cross section whose two sides are parallel to the axis of the main body 1 and the valve body 3. The bearing case 5 that fits tightly is a hat having a cylindrical blind hole in a rectangular parallelepiped. Concentric pin grooves 18 and 19 are provided on inner and outer surfaces of the bearing case 5 and the opening 15 which are in contact with each other and are parallel to the axis of the main body 1, and through two pins 17 which pass through the concentric pin grooves 18 and 19. The bearing case 5 is detachably fixed to the main body 1. A slide bearing 7 made of Teflon resin is provided in the bearing case 5, and a short shaft portion 13 protruding from the valve body 3 through the liner 4 is supported by the slide bearing 7.

The bearing sleeve 6 has a rectangular parallelepiped shape at the lower end, a cylindrical shape on the lower end, and a cylindrical shape with a flange at the uppermost portion, and a long shaft portion 14 penetrates the inside. As shown in FIGS. 4 and 5,
The opening 16 formed by the halves 11 and 12 of the main body 1 has a square cross section whose two sides are parallel to the axis of the main body 1 and the valve body 3, and the lower end of the rectangular parallelepiped of the bearing sleeve 6 is tight in the opening 16. Fit. Concentric pin grooves 21 and 22 for passing a common pin 20 are provided on both inner and outer side surfaces of the bearing sleeve 6 and the opening 16 which are parallel to the axis of the main body 1 and are in contact with each other. 6 is detachably fixed to the main body 1.
A slide bearing 8 made of Teflon resin is provided inside a rectangular parallelepiped at the lower end of the bearing sleeve 6, and a long shaft portion 14 protruding from the valve body 3 through the liner 4 is supported.

Although the main body 1 is made of stainless steel, the outer diameter at the center of the outer peripheral surface is relatively small and light because the slide bearings are provided on both sides in the diameter direction. For example, the weight of the butterfly valve of the present invention is 3.5K at a nominal diameter of 150A.
gf, 200A, is about 7 kgf, which is less than half that of the conventional one. Further, since the Teflon bearings 7 and 8 are provided on both sides in the diameter direction of the valve body 3, the allowable pressure is greatly increased, and the durability is improved. For example, nominal diameter 150A
The allowable pressure of the butterfly valve of the present invention is 0.2 MPa, which is much larger than the conventional one of 300 mmAq.

Since the two halves 11 and 12 have the same shape and the same size and have no direction, the assembling is easier than that of the conventional combination. The bearing case 5 and the bearing sleeve 6 can be easily positioned and fixed by the pins 17 and 20. Furthermore, since the butterfly valve of the embodiment has a simple structure as a whole, it is extremely easy to disassemble, assemble, and clean.

[0017]

As described above, the butterfly valve of the present invention is different from the conventional type in which only one long-axis portion in the diameter direction of the valve body is bearing by a Teflon resin slide bearing, and is different from the conventional system in which both sides in the diameter direction of the valve body are different. Since the bearing is a system using a Teflon resin slide bearing, the following excellent effects can be obtained. 1. The outer diameter at the center of the outer peripheral surface of the main body is reduced, and the weight is reduced. 2. The allowable pressure is greatly increased, and the durability is improved. 3. The two halves for assembling the body have no direction in combination and are easy to assemble. 4. The overall structure is simple and easy to disassemble, assemble and clean.

[Brief description of the drawings]

FIG. 1 is a front view of a butterfly valve according to an embodiment of the present invention;

FIG. 2 is a plan view of the butterfly valve of FIG. 1;

FIG. 3 is an enlarged side sectional view of the bearing case of FIG. 1;

4 is a view taken in the direction of arrows IV-IV in FIG. 3;

FIG. 5 is an enlarged side sectional view of a main part of the bearing sleeve of FIG. 1;

6 is a view taken along line VI-VI in FIG. 5;

[Explanation of symbols]

 1: Body 2: Band 3: Valve element 4: Liner 5: Bearing case 6: Bearing sleeve 7, 8: Slide bearing 9: Handle lever 10: Handle block 11, 12: Half body 13: Short shaft part 14: Long shaft Part 15: Opening (1 end side) 16: Opening (other end side) 17: Pin 18, 19: Pin groove 20: Pin 21, 22: Pin groove 23: Ring 24: Bolt 25: Nut 26: Nut hook

Claims (3)

[Claims] 1. A cylindrical body (1), and a disc-shaped valve body (3) rotatably provided in the body, wherein the body has two cylindrical bodies of the same shape and the same size. The halves (11, 12) are symmetrically abutted in the axial direction, and a band (2)
The valve body has a short shaft portion (13) protruding from one end in the diameter direction and a long shaft portion (1) protruding from the other end and penetrating the band and having a handle or the like attached to the tip.
4), wherein the main body is a butterfly valve that bears the short axis portion at one end side in the diameter direction and the long axis portion at the other end side, and one end side and the other end side in the diameter direction of the main body. A hat-shaped bearing case (5) for inserting the short shaft and a cylindrical bearing sleeve (6) for penetrating the long shaft are inserted into openings (15, 16) formed by the halves at the center. A butterfly valve for a container, characterized in that slide bearings (7, 8) are provided in the bearing case and the bearing sleeve, respectively, which are removably fitted and fixed, and slide bearings (7, 8) for bearing the short shaft portion and the long shaft portion, respectively. . 2. The opening (15, 16) has a rectangular cross section whose two sides are parallel to the axis of the main body (1) and the axis of the valve body (3),
A butterfly valve for a container, wherein at least a portion of the bearing case (5) and the bearing sleeve (6) that engages with the opening is a rectangular parallelepiped fitted into the opening without a gap. 3. A concentric pin groove (18, 19, 21) parallel to the axis of the main body (1) is formed in a contact surface between the bearing case (5), the bearing sleeve (6) and the opening (15, 16). , 22)
3. The butterfly valve for a container according to claim 2, wherein the bearing case and the bearing sleeve are detachably fixed to the main body via pins (17, 20) inserted into the pin grooves.