JPH0667968U - Ball valve - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a ball valve that is easy to assemble and disassemble and has no liquid storage pocket. [Structure] A pair of body divided portions 1 butted against each other
The flanges 1d of a and 1b are configured to be clamped as a whole by a ring-shaped clamping means 8. The clamp means 8 is composed of a pair of tightening portions 8a and 8b rotatably connected at one end, and a screw pin 8j and a nut 8i for tightening the other end. Nut 8i
And the screw pin 8j is tilted in the direction of the arrow X to release the pair of tightening portions 8a and 8b, whereby the pair of body divided portions 1a and 1b can be disassembled. A seal is provided between the ball valve and the body 1 to eliminate the liquid storage pocket.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a ball valve, and more particularly to a ball valve that is easy to assemble, disassemble, and clean, and that has no liquid pocket between the body and the ball valve.

[0002]

[Prior art]

 In a ball valve, its body is generally divided into two parts. The flanges of the pair of divided parts of the body are butted against each other, and both flanges are fixed by tightening bolts and nuts. Bolts and nuts are usually tightened at 4 to 8 points. Depending on the intended use, it is necessary to disassemble and clean the ball valve frequently, but in the case of the conventional bolt and nut tightening method described above, tighten the bolts and nuts at several points during assembly and disassembly. Or it needs to be removed, and the work is troublesome and takes a long time.

[0003]

[Problems to be solved by the device]

 Therefore, the technical problem to be solved by the present invention is to provide a structure of a ball valve which can be easily assembled and disassembled.

[0004]

[Means for Solving the Problems]

 In order to solve the above technical problems, the present invention provides a ball valve having the following configuration.

That is, the ball valve includes a body that is assembled by mutually assembling a pair of body divided portions so that they can be disassembled, a ball valve that is rotatably housed in the body, and the ball valve is connected to the body. And a ball valve rotating shaft that penetrates a predetermined portion of the abutting portion of the pair of body divided portions. Further, a clamp means for fixing the pair of body divided parts to each other and a seal housed in the body and covering the entire spherical outer peripheral surface of the ball valve are provided. Each body segment is substantially symmetrical to each other and has a flange on each outer periphery of its abutting ends. The clamping means is composed of a pair of roughly semi-ring-shaped tightening parts that are rotatably connected at one opposite end, and tightening means that connects the other opposite ends of each tightening part so that they can be tightened and released. The portion has a groove into which a pair of butting flanges of a pair of body divided portions are fitted at the time of tightening, and further, a predetermined portion of one tightening portion has a penetrating portion through which the ball valve rotating shaft penetrates. . The seal is composed of a pair of seal divided portions, and has a through hole through which the ball valve rotating shaft penetrates at a predetermined portion of the abutting portion. Then, when the clamp means is tightened, the pair of flanges of the paired body divided portion are liquid-tightly held.

[0006]

[Action / effect]

 According to the above configuration, the pair of tightening portions can be connected and tightened or separated and released only by operating one tightening means provided in the clamp means. By this, a pair of body divided parts can be combined or disassembled. Therefore, according to the configuration of the present invention, assembling and disassembling the ball valve becomes much easier than the conventional one, and the work efficiency can be improved.

In addition, according to the above configuration, since the liquid pool pocket (formed between the body and the ball valve) formed in the conventional ball valve is occupied by the seal, There is no liquid pocket. Therefore, there is an advantage that the problem of rust generation which has been generated in the conventional liquid pool pocket is solved, and the cleaning work can be facilitated even in the disassembling and cleaning work of the ball valve.

[0008]

【Example】

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

In the figure, 1 is a body, 2 is a ball valve rotatably housed in the body 1, 7 is a ball valve rotating shaft integrated with the ball valve 2, and 6 is a ball valve rotating shaft 7. It is a handle that is connected to the upper end to rotate, that is, open and close, the shaft 7 and the ball valve 2. A seal 3 is interposed between the inner peripheral surface of the body 1 and the outer peripheral surface of the ball valve 2.

The body 1 has a two-part structure and is composed of body divided portions 1a and 1b. The body divided portions 1a and 1b are substantially symmetrically formed with respect to each other. A flange 1d is provided on the outer circumference of each butt end of each body divided portion 1a, 1b. Each flange 1d has a butt end surface to be butted against each other and an inclined outer side surface 1e inclined toward the butt end surface side. The pair of flanges 1d, 1d are liquid tightly clamped by the clamp means 8.

The clamping means 8 has a pair of substantially semi-ring-shaped tightening portions 8a and 8b, and these tightening portions 8a and 8b rotate on one end side via a connecting link 8c and a pivot pin 8m. It is freely connected. The other opposing ends of the tightening portions 8a and 8b are formed as ears 8g so as to face each other. A fixed end of a screw pin 8j as a tightening means is rotatably connected to the ear portion 8g on the tightening portion 8a side by a pivot pin 8k. That is, a release slot 8h is formed in both ears 8g, and the fixed end of the screw pin 8j is fixed by the pivot pin 8k while being inserted into the slot 8h. The other end of the screw pin 8j is also inserted into the slot 8h of the ear portion 8g of the other tightening portion 8b. Therefore, the screw pin 8j can be rotated along the slot, that is, in the direction of arrow X in FIG. By this rotation, the lower tightening portion 8b can be rotated in the arrow Y direction. A nut 8i is screwed onto the screw pin 8j. By tightening the nut 8i to the screw pin 8j, the pair of flanges 1d and 1d can be tightened to each other.

Each tightening portion 8a, 8b has a groove 8d into which the pair of butt flanges 1d, 1d are fitted at the time of tightening. The groove 8d has an inclined inner side surface 8e corresponding to the inclined outer side surface 1e of the flange 1d. In other words, when the clamps 8 are tightened, the inclined inner side surfaces 8e press the inclined outer side surfaces 1e of the flange 1d toward each other, so that the abutting end faces of the body divided portions can be abutted with a sufficient pressure. You can do it. A ring-shaped seal 5 is interposed between the abutting end faces of the pair of body divided portions 1a and 1b. The seal 5 is located between the first ring portion 5a sandwiched between the pair of body divided portions 1a and 1b and, in the assembled state, around the ball valve rotating shaft 7 and between the seal 3 and the body 1. It is composed of the second ring portion 5b (see FIGS. 1 and 2). A tubular portion 8f is formed in the central portion of one tightening portion 8a, and the ball valve rotating shaft 7 penetrates through the tubular portion 8f.

The above-mentioned seal 3 also has a split structure, and is composed of two seal divided portions 3a and 3b. Then, a through hole 3c through which the ball valve rotating shaft 7 penetrates is formed at a predetermined portion of these butted portions, that is, in the upper center portion in the drawing.

For the seal 3, it is preferable to use a fluorocarbon resin, particularly a tetrafluoroethylene resin (registered trademark: Teflon). The seal 3 is fitted and fixed at a predetermined position on the inner peripheral surface of the body 1. In order to further seal between the inner peripheral surface of the body 1 and the seal 3, ring-shaped seals 4a and 4b are provided at the fluid inlet and outlet of the body 1, respectively. It is preferable that the ring-shaped seals 4a and 4b have a hardness lower than that of the seal 3, for example, a material in which various rubbers are mixed with tetrafluoroethylene resin.

In the figure, 1 c is a through hole formed in each body divided portion 1 a, 1 b of the body 1, and 2 a is a through hole formed in the ball valve 2.

In the above structure, the ball valve 2 and the body 1 are sealed by the seal 3 and the ring-shaped seals 4a and 4b. Therefore, even when the ball valve 2 is closed, the liquid accumulated in the through hole 2a is prevented from entering between the spherical outer peripheral surface of the ball valve 2 and the inner peripheral surface of the body 1. That is, the liquid is configured not to reach the ball valve rotating shaft 7.

Further, in the above structure, since the seal 3 is made of tetrafluoroethylene resin, its coefficient of friction is small, and therefore the ball valve can rotate very smoothly.

Further, in the above-mentioned configuration, the simple operation of tightening or releasing the nut 8i, the turning operation of the screw pin 8j, and the fitting of the upper tightening portion 8a to the ball valve turning shaft 7 or By pulling out, the tightening portions 8a, 8b of the clamp means 8 can be tightened or released, and thereby the pair of body divided portions 1a, 1b can be assembled or disassembled.

[Brief description of drawings]

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

FIG. 2 is a perspective view of a seal 5 used in FIG.

FIG. 3 is a right side view of the ball valve of FIG. 1 with a part thereof broken away.

[Explanation of symbols]

1 Body 1a, 1b Body split part 1c Through hole 1d Flange 1e Inclined outer surface 2 Ball valve 2a Through hole 3 Seal 3a, 3b Seal split part 3c Through hole 4a, 4b Seal 5 Seal 5a First ring part 5b Second ring part 6 Handle 7 Ball Valve Rotating Shaft 8 Clamping Means 8a, 8b Tightening Part 8c Connecting Link 8d Groove 8e Inclined Inner Side 8f Cylinder 8g Ear 8h Slot 8i Nut 8j Screw Pin 8k, 8m Pivot Pin

Claims (1)

[Scope of utility model registration request] 1. A body (1) assembled by assembling a pair of body divided parts (1a, 1b) so that they can be disassembled from each other.
A ball valve (2) rotatably housed in the body (1), and a pair of body split parts (1) connected to the ball valve (2).
A ball valve rotating shaft (7) penetrating a predetermined part of a butting part of (a, 1b), and a clamp for fixing a pair of body divided parts (1a, 1b) to each other. A means (8) and a seal (3) housed in the body (1) and covering the entire spherical outer peripheral surface of the ball valve (2) are provided, the body divided parts (1a, 1b) being substantially mutually It is symmetrical and has a flange (1d) on the outer periphery of each abutting end, and the clamping means (8) is a pair of substantially semi-ring-shaped tightening portions (8a, 8b) rotatably connected at one opposing end. When,
Tighten the other facing end of each tightening part (8a, 8b).
It is composed of tightening means (8i, 8j, 8k) releasably connected, and each tightening part (8a, 8b) is a pair of butting flanges of a pair of body divided parts (1a, 1b) at the time of tightening.
Has a groove (8d) into which (1d, 1d) is fitted, and further has a penetrating portion (8f) through which the ball valve rotating shaft (7) penetrates at a predetermined portion of one tightening portion (1a), The seal (3) is composed of a pair of seal divided portions (3a, 3b), and a ball valve rotating shaft is provided at a predetermined portion of the abutting portions.
(7) has a through hole (3c) penetrating therethrough, and by clamping the clamping means (8), the pair of flanges (1d, 1d) of the paired body divided portions (1a, 1b) are liquid-tightly held. A ball valve that is characterized.