JP2598674Y2 - Ball valve with strainer - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ball valve with a strainer in which a ball valve and a strainer are integrally formed.

[0002]

2. Description of the Related Art A ball valve with a strainer is widely used in fields such as LPG storage facilities and LPG supply piping. Such a ball valve with a strainer is disclosed, for example, in Japanese Utility Model Laid-Open Publication No. 64-3162. There is. This is provided with an outflow port on the left and right, a ball storage chamber communicating with the inflow port in the middle part, a valve stem penetration part in the middle upper part, a stopper at the upper end of the valve stem penetration part, and a ball in the middle lower part. A valve box provided with a filter storage chamber communicating with the storage chamber and the outlet, a lid screwed on the upper end of the valve rod penetration of the valve box, and a valve rod penetrating the lid and the valve rod penetration of the valve box; A handle fixed to the upper end of the valve stem and abutting against the stopper of the valve box when fully opened and fully closed, a filter mounted in the filter storage chamber of the valve box, and a plug screwed into the lower end of the filter storage chamber; A ball valve with a strainer having a pair of seat rings attached to the left and right ends of the ball storage chamber of the valve box, and a ball which is held between the seat rings, has a communication hole extending from the side surface to the lower surface, and is engaged with the lower end of the valve stem. It is. In that case, in the conventional ball valve with a strainer, the center line of the ball storage chamber of the valve box, the valve stem penetration part, and the filter storage chamber,
The valve is provided at the center between the inlet and the outlet of the valve box, that is, the interval between the inlet and the center line is equal to the interval between the outlet and the center line. Also, in the conventional ball valve with a strainer, only one stopper is provided at the upper end of the valve stem penetration portion of the valve box to come into contact with a stop formed at the tip of the handle when fully opened and to contact the side surface of the handle when fully closed. I was

[0003]

In the above-mentioned conventional ball valve with a strainer, the fluid that has flowed in from the inflow port turns 90 ° in the ball, goes downward, passes through the filter, and then goes to the outflow port. However, the inlet and the outlet are arranged coaxially, and in the above-mentioned conventional ball valve with a strainer, the interval between the inlet and the ball storage chamber and the interval between the filter storage chamber and the outlet are formed equal. The flow path from the filter storage chamber to the outlet is almost vertically upward, and then turns further horizontally to reach the outlet. That is, although the direction of the fluid entering the filter is downward, the fluid exiting the filter is almost upward, so that the flow direction of the fluid at the inlet and outlet of the filter is almost 180 °. For this reason, the flow path resistance increases, and the pressure loss increases. As a result, it is necessary to increase the pressure resistance of the ball valve with strainer itself and the pressure resistance of the pipeline, and it is necessary to increase the head of the pump that drives the fluid. Was occurring.

In the conventional ball valve with a strainer, only one stopper is provided at the upper end of the valve stem penetrating portion of the valve box, so that the handle can be mounted only in a fixed state. However, LPG storage facilities and LPG using this ball valve with strainer
In the field of supply piping or the like, two identical systems are often prepared and used by switching between the two systems. Therefore, piping is often symmetrical. As a result, as shown in FIG. 4, for example, in the right system, the inflow port is disposed on the right side, and the strained ball valve V is mounted. In the left system, the inflow port is disposed on the left side, and the strained ball valve V is mounted. . Here, when the handle 4 is rotated 90 ° clockwise from the fully open state O to the fully closed state S, the valve closing operation can be performed by rotating the handle 4 to the front open space in the right system, In the left system, the handle 4 is the back wall W
Therefore, there is a problem that the valve closing operation cannot be performed due to interference with the operation. Therefore, the present invention provides a ball valve with a strainer that has a small flow path resistance and therefore a small pressure loss, and also provides a ball valve with a strainer that can open and close without trouble by avoiding interference with a wall or the like. The purpose is to:

[0005]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object. That is, an outflow port is provided coaxially with the left and right, and a ball storage chamber communicating with the inflow port is provided at an intermediate portion. A valve box provided with a filter storage chamber communicating with a ball storage chamber and an outlet at an intermediate lower portion, a valve stem mounted on an upper portion of the valve box, a valve stem rotation handle fixed to an upper end of the valve stem, The filter installed in the filter storage room of the valve box, the seat ring mounted in the ball storage room of the valve box,
A ball valve with a strainer having a communication hole which is sandwiched by the seat ring, extends from the side surface to the lower surface, and has a ball engaged with the lower end of the valve stem. A strainer-equipped ball valve, which is provided so as to be closer to the inflow side than the center between the inflow port and the outflow port. At this time , two stoppers are formed at the upper end of the valve stem mounting portion of the valve box and are restricted in rotation by rotating the handle when the handle is fully opened and fully closed at a 180 ° rotationally symmetric position. When the handle is fully opened, the stopper abuts on one stopper. When fully closed, a stop portion having a stop width that comes into contact with the other stopper can be formed.

[0006]

The center line of the ball storage chamber of the valve box, the valve stem penetrating portion, and the filter storage chamber is shifted toward the inflow side from the center between the inflow port and the outflow port of the valve box, so that the inflow port and the ball storage are provided. The distance between the filter storage chamber and the outlet is increased, and the distance between the filter storage chamber and the outlet is increased. Of these, there is no particular difference from the related art since the fluid merely travels straight from the inlet to the ball storage chamber. However, since the distance between the filter storage chamber and the outlet is longer, it is not necessary to form the flow path of the filter storage chamber outlet upward, and the filter storage chamber is inclined obliquely upward. It can be a channel. As a result, the flow direction of the fluid at the inflow / outflow portion of the filter does not need to be turned by almost 180 °, so that the flow path resistance is significantly reduced and the pressure loss is also reduced. In the case of a ball valve with a strainer having two 180 ° rotationally symmetrical stoppers, even if the handle interferes with a wall or the like during the opening and closing operation, the opening and closing operation of the handle can be changed by 180 ° to perform the opening and closing operation without hindrance. Can be done.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 and 2 show a fully opened state of a ball valve V with a strainer according to an embodiment of the present invention. An inlet 1a is provided on the right side of the valve box 1, and an outlet 1b is provided on the left side. I have.
An intermediate portion of the valve box 1 that is biased toward the inlet 1a has an inlet 1
A ball storage chamber 1c communicating with the ball storage chamber 1c is provided. An upper portion of the intermediate portion is provided with a valve stem penetration portion 1d, and a lower portion of the intermediate portion is communicated with the ball storage chamber 1c and the outlet 1b. A filter storage chamber 1e is provided. Two stoppers 1f and 1g are projected from the upper end of the valve stem penetration portion 1d of the valve box in a 180 ° rotationally symmetrical manner, and a lid 2 is screwed on the upper end of the valve stem penetration portion 1d of the valve box. doing. This lid 2
The valve stem 3 penetrates through the stem penetrating portion 1d of the valve box, and the handle 4 is fixed to the upper end of the stem 3. The handle 4 has a stop portion 4a that contacts one of the stoppers 1f of the valve box when fully opened, and contacts the other 1g when fully closed.

[0008] A filter 5 is mounted in the filter storage chamber 1e of the valve box, and a plug 6 is screwed to a lower end of the filter storage chamber 1e. Thus, the plug 6 stores the filter 5 in the filter storage chamber 1e. The filter 5 is pressed toward the upper end to fix the filter 5. A pair of seat rings 7, 7 are attached to both left and right ends of the ball storage chamber 1c of the valve box, and balls 8 are mounted between the two seat rings 7, 7, and the seat ring 7 on the inflow side is The ball 8 is pressed toward the ball 8 by the retainer 9 and the insert 10, and the ball 8 is rotatably held between the two seat rings 7. A communication hole 8a is formed in the ball 8 from the side surface to the lower surface so as to communicate and shut off the inflow port 1a of the valve box and the filter storage chamber 1e. A notch 8b is formed in the upper part of the ball 8 from the near side to the far side in FIG.
At the center bottom of b, a hole 8c is formed toward the center of the ball. The lower end of the valve stem 3 is formed into a shape that fits into the notch 8b and the hole 8c of the ball, and thus the ball 8 is configured to rotate coaxially with the rotation of the valve stem 3. .

The ball valve with strainer V of the present embodiment is constructed as described above, and the ball storage chamber 1 of the valve box is provided.
c, the center lines of the valve stem penetration portion 1d and the filter storage chamber 1e are provided closer to the inflow port 1a side than the center of the inflow port 1a and the outflow port 1b of the valve box. The distance between the outlet and the outlet 1b is longer than in the conventional example. As a result, the flow path 1h at the outlet of the filter storage chamber 1e
Is a path obliquely obliquely directed toward the outflow port 1b, so that the pressure loss of the ball valve with strainer V is reduced as compared with the conventional example. Now, the distance between the surfaces, that is, the distance between the flange on the inlet 1a side and the flange on the outlet 1b side is 1
For a 10 mm product, the distance from the end face of the flange on the inlet 1a side to the center line of the ball storage chamber 1c, the valve stem penetrating portion 1d and the filter storage chamber 1e is 44.5mm, and the center from the end face of the flange on the outlet 1b side. 6 to the line
The pressure loss of the product with 5.5 mm was compared with the conventional example, that is, the pressure loss of the product whose center line was 55 mm from both the end face of the flange on the inlet 1a side and the end face of the flange on the outlet 1b side. It was found that an improvement of about 12.5% in value was obtained.

Also, in this embodiment, the valve stem penetrating portion 1d of the valve box is used.
Two stoppers 1f and 1g at the upper end are provided in a 180 ° rotationally symmetric manner. Therefore, as shown in FIG. 3, for example, in the case of the right system, by attaching the handle 4 in the same manner as in FIGS. 1 and 2, the stop portion 4a of the handle comes into contact with the one stopper 1f in the fully open state O (see FIGS. 2 and 3). From the right line of the right system) to the fully closed state S (see the two-dot chain line of the right system in FIG. 5 and FIG. 3) in which the stop portion 4a contacts the other stopper 1g. This can be performed in the open space on the near side without interfering with the wall W. On the other hand, in the left system, the ball valve with strainer V is mounted symmetrically with the right system, and then the handle 4
° and install it in the same direction as the right system,
From the fully opened state O (see the solid line on the left system in FIG. 3) in which the stop portion 4a of the handle contacts the other stopper 1g,
The opening / closing operation of the valve until the fully closed state S (see the two-dot chain line in the left system in FIG. 3) in which the stop portion 4a abuts on one of the stoppers 1f is similarly opened to the front side without interfering with the wall W. Can be done within

[0011]

According to the present invention, a ball valve with a strainer having a small flow path resistance and hence a small pressure loss can be obtained, and a ball with a strainer which can open and close without trouble by avoiding interference with a wall or the like. A valve was obtained.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a valve opening state of an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a schematic plan view showing the same mounting state.

FIG. 4 is a schematic plan view showing a mounting state of a conventional example.

FIG. 5 is a plan view showing a closed state of the embodiment of the present invention;

Continuation of the front page (56) References Japanese Utility Model Showa 64-3162 (JP, U) Japanese Utility Model Showa 62-66072 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F16K 5 / 08 B01D 35/02 F16K 51/00 F16K 31/44-31/62

Claims (2)

(57) [Scope of request for utility model registration] 1. A valve having an outflow port provided coaxially in the left and right directions, a ball storage chamber communicating with the inflow port at an intermediate portion, and a filter storage chamber communicating with the ball storage chamber and the outflow port at a lower intermediate portion. A box, a valve stem mounted on an upper part of the valve box, a handle for rotating a valve stem fixed to an upper end of the valve stem, a filter mounted in the filter storage chamber of the valve box, and a ball storage chamber of the valve box A ball ring having a strainer, the ball ring having a communication hole extending from a side surface to a lower surface, the ball being engaged with the lower end of the valve stem. A ball valve with a strainer, wherein the filter storage chamber is provided so as to be shifted toward the inflow port side from the center of the inflow port and the outflow port of the valve box. 2. A stopper is provided at the upper end of the valve stem mounting portion of the valve box, the stopper being abutted when the handle is fully opened and fully closed to restrict rotation.
2. The strainer according to claim 1 , wherein two stop portions are formed at rotationally symmetric positions and have a stop width that contacts one of the stoppers when the handle is fully opened and contacts the other stopper when fully closed. With ball valve.