JPH0710648U - Ball valve with strainer - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a ball valve with a strainer having a small flow path resistance and therefore a small pressure loss. [Construction] A valve box 1 having outlet ports 1a and 1b on the left and right sides, a ball storage chamber 1c provided at an intermediate portion, a valve rod penetrating portion 1d provided at an intermediate upper portion, and a filter storage chamber 1e provided at a lower intermediate portion.
, A lid 2 screwed to the upper end of the valve rod penetrating portion, a valve rod 3 penetrating the lid and the valve rod penetrating portion, a filter 5 attached to the filter housing chamber, and a lower end of the filter housing chamber. It is clamped by the plug 6, a pair of seat rings 7, 7 attached to the left and right ends of the ball storage chamber, and the seat ring.
In a ball valve V with a strainer having a communication hole 8a extending from the side surface to the lower surface and having a ball 8 engaging with the lower end of the valve rod, the ball storage chamber 1c, the valve rod penetrating portion 1d, and the filter storage chamber 1e are connected to the inlet port. It is characterized in that it is provided closer to the inflow port 1a side than the center between the 1a and the outflow port 1b.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a ball valve with a strainer in which a ball valve and a strainer are integrally formed.

[0002]

[Prior art]

 The ball valve with a strainer is widely used in the fields of LPG storage equipment, LPG supply piping, etc. As the ball valve with a strainer, for example, there is one disclosed in Japanese Utility Model Laid-Open No. 64-3162. It has outlets on the left and right sides, a ball storage chamber in the middle that communicates with the inlet, a valve rod penetrating part in the middle upper part, a stopper protruding from the upper end of the valve rod penetrating part, and a ball in the middle lower part. A valve box provided with a filter storage chamber that communicates with the storage chamber and the outlet, a lid screwed to the upper end of the valve rod penetrating portion of the valve casing, and a valve rod penetrating the lid and the valve rod penetrating portion of the valve casing. A handle that is fixed to the upper end of the valve stem and comes into contact with the stopper of the valve box when fully opened and fully closed, a filter installed in the filter housing chamber of the valve housing, and a plug screwed to the lower end of the filter housing chamber. , A strainer having a pair of seat rings attached to the left and right ends of the ball accommodating chamber of the valve box, and a ball held between the seat rings, having a communication hole extending from the side surface to the lower surface, and engaging with the lower end of the valve rod. It is an attached ball valve. At that time, in the conventional ball valve with strainer, the center line of the ball storage chamber of the valve box, the valve rod penetrating portion and the filter storage chamber is provided at the center of the inlet and outlet of the valve box, that is, the inlet. The distance between the center line and the center line is equal to the distance between the outlet and the center line. In the conventional ball valve with strainer, only one stopper is provided at the upper end of the valve stem penetrating part of the valve box, which comes into contact with the stop part formed at the tip of the handle when fully opened and with the side face of the handle when fully closed. It was being done.

[0003]

[Problems to be solved by the device]

 In the conventional ball valve with a strainer, the fluid flowing from the inflow port turns 90 ° in the ball and goes downward, and after passing through the filter, goes to the outflow port. However, the inflow port and the outflow port are arranged coaxially, and in the above conventional ball valve with a strainer, the space between the inflow port and the ball storage chamber and the space between the filter storage chamber and the outflow port are formed to be equal. Therefore, the flow path from the filter storage chamber to the outlet becomes almost vertically upward, and then it further turns horizontally to reach the outlet. That is, although the fluid entering the filter is directed downward, the fluid exiting the filter is directed almost upward, so that the flow direction of the fluid is turned about 180 ° at the inlet and outlet of the filter. For this reason, the flow path resistance increases, resulting in a large pressure loss. As a result, it becomes necessary to increase the pressure resistance of the ball valve with strainer itself and the pressure resistance of the pipeline, and also to raise the lift of the pump that drives the fluid. There was a need.

Further, in the above conventional ball valve with strainer, only one stopper is provided at the upper end of the valve rod penetrating portion of the valve box, and therefore the handle can be mounted only in a fixed state. . However, in fields such as LPG storage equipment and LPG supply piping that use this ball valve with strainer, it is common to prepare two identical systems and switch between the two systems for use, and therefore, symmetrical piping is required. Many. As a result, as shown in FIG. 4, for example, in the right system, the inlet is arranged on the right side and the ball valve V with a strainer is attached, and in the left system, the inlet is arranged on the left side and the ball valve V with a strainer is attached. It will be. Here, when the handle 4 is rotated clockwise 90 ° from the fully open state O to the fully closed state S, the handle 4 can be rotated to the front open space in the right system to perform the valve closing operation. The left system has a problem that the valve 4 cannot be closed because the handle 4 interferes with the back wall W. Therefore, the present invention provides a ball valve with a strainer that has a small flow path resistance and thus a small pressure loss, and also provides a ball valve with a strainer that can be opened and closed without interference with walls and the like. The purpose is to do.

[0005]

[Means for Solving the Problems]

 The present invention has been made to achieve the above-mentioned object. That is, the inlet and outlet are provided on the left and right sides, the ball storage chamber communicating with the inlet is provided at the middle portion, and the valve stem penetrating portion is provided at the upper middle portion. A valve box is provided with a stopper protruding from the upper end of the rod penetrating part and a filter accommodating chamber in the lower middle part that communicates with the ball accommodating chamber and the outlet. , The valve stem that penetrates the lid and the valve stem penetrating part of the valve casing, the handle that is fixed to the upper end of the valve stem and contacts the stopper of the valve casing when fully opened and fully closed, and the filter storage chamber of the valve casing. It has a filter attached to it, a screw that is screwed to the lower end of the filter storage chamber, a pair of seat rings attached to the left and right ends of the ball storage chamber of the valve box, and a communication ring that is sandwiched between the seat rings and extends from the side surface to the lower surface. Ball that engages with the lower end of the valve stem In a ball valve with a strainer that has a valve box, the ball storage chamber, valve stem penetrating portion and filter storage chamber of the valve box are installed closer to the inlet side than the center of the inlet and outlet of the valve box. A featured ball valve with strainer. At that time, two stoppers are formed at the upper end of the valve rod penetrating portion of the valve box for 180 ° rotation, and a stop portion is formed at the tip of the handle that abuts one stopper when fully opened and abuts the other stopper when fully closed. be able to.

[0006]

[Action]

 By aligning the center lines of the ball storage chamber, valve stem penetration and filter storage chamber of the valve box to the inlet side rather than the center of the inlet and outlet of the valve box, the inlet and the ball storage chamber are separated. The space between the filter storage chamber and the outflow port becomes longer. Among these, between the inflow port and the ball storage chamber, the fluid simply travels straight, so there is no particular difference from the conventional case. 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 flow path is inclined toward the upper outlet. It can be a flow path. As a result, the flow direction of the fluid does not have to be turned around 180 ° at the inflow / outflow portion of the filter, so that the flow path resistance is significantly reduced and the pressure loss is also reduced. With a ball valve with a strainer that has two stoppers that can be rotated by 180 °, even if the handle interferes with the wall during opening / closing, the handle mounting direction can be changed by 180 ° to allow opening / closing without hindrance. Will be possible.

[0007]

【Example】

 The present invention will be described with reference to the drawings. 1 and 2 show a fully open 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. ing. A ball storage chamber 1c communicating with the inflow port 1a is provided in an intermediate part of the valve box 1 which is offset to the inflow port 1a side, and a valve rod penetrating part 1d is provided in the upper part of the intermediate part. A filter storage chamber 1e communicating with the ball storage chamber 1c and the outlet 1b is provided in the lower part of the intermediate portion. Two stoppers 1f and 1g are provided on the upper end of the valve rod penetrating portion 1d of the valve box so as to be rotated by 180 °, and a lid 2 is screwed on the upper end of the valve rod penetrating portion 1d of the valve box. I'm wearing it. The valve rod 3 penetrates the lid 2 and the valve rod penetrating portion 1d of the valve box, and the handle 4 is fixed to the upper end of the valve rod 3. The handle 4 is formed with a stop portion 4a that comes into contact with one of the stoppers 1f of the valve box when fully opened, and comes into contact with the other 1g when fully closed.

A filter 5 is mounted in the filter storage chamber 1e of the valve box, and a plug 6 is screwed to the lower end of the filter storage chamber 1e. Thus, the plug 6 holds the filter 5 in the filter storage chamber 1e. The filter 5 is fixed by pressing it toward the upper end of 1e. A pair of seat rings 7 and 7 are attached to the left and right ends of the ball storage chamber 1c of the valve box, and balls 8 are mounted between the seat rings 7 and 7, and the seat ring 7 on the inlet side is attached. Is pressed toward the ball 8 side by the retainer 9 and the insert 10, and thus the ball 8 is rotatably sandwiched by the two seat rings 7, 7. The ball 8 is formed with a communication hole 8a extending from the side surface to the lower surface thereof so as to communicate / block the inflow port 1a of the valve box and the filter storage chamber 1e. Moreover, a notch 8b is formed in the upper part of the ball 8 from the front side to the back side of the paper of FIG. 1, and a hole 8c facing the center of the ball is formed at the center bottom of the notch 8b. . The lower end of the valve rod 3 is formed in a shape that fits into the notch 8b of the ball and the hole 8c, and thus the ball 8 is configured to rotate coaxially with the rotation of the valve rod 3. There is. .

The strainer-equipped ball valve V of the present embodiment is configured as described above, and the center line of the ball storage chamber 1c, the valve rod penetrating portion 1d and the filter storage chamber 1e of the valve box is the inlet of the valve box. Since it is provided closer to the inlet 1a side than the center between the outlet 1a and the outlet 1b, the distance between the filter storage chamber 1e and the outlet 1b becomes longer than in the conventional example. As a result, the flow passage 1h at the outlet of the filter storage chamber 1e becomes a flow passage oblique to the flow outlet 1b located obliquely above, so that the pressure loss of the ball valve V with strainer is reduced as compared with the conventional example. Now for the product with the face-to-face dimension, that is, the gap between the inlet 1a side flange and the outlet 1b side flange of 110 mm, from the end face of the inlet 1a side flange, the ball storage chamber 1c, the valve rod penetrating portion 1d and the filter storage chamber The distance to the center line of 1e is 44. 5 mm, the pressure loss of a product in which the distance from the end face of the outlet 1b side flange to the center line is 65.5 mm is the conventional example, that is, the center line is also the outlet 1b side flange from the end face of the inlet 1a side flange. It was found that an improvement of about 12.5% was obtained in the CV value when compared with the pressure loss of the product which was 55 mm from the end face.

Further, in the present embodiment, two stoppers 1f and 1g at the upper end of the valve rod penetrating portion 1d of the valve box are provided for 180 ° rotation. Therefore, as shown in FIG. 3, for example, in the right system, by attaching the handle 4 in the same manner as in FIGS. 1 and 2, from the fully open state O in which the stop portion 4a of the handle comes into contact with one stopper 1f, the stop portion 4a is stopped. The valve opening / closing operation up to the fully closed state S in which 4a contacts the other stopper 1g can be performed in the open space on the front side without interfering with the wall W. On the other hand, in the left system, the ball valve with strainer V is installed symmetrically with the right system, and then the handle 4 is changed by 180 ° and installed in the same direction as the right system, so that the handle top portion 4a becomes the other. Similarly, the opening and closing operations of the valve from the fully open state O in which the stopper 1g abuts to the fully closed state S in which the stop portion 4a abuts one stopper 1f are similarly performed in the open space on the front side without interfering with the wall W. It can be carried out.

[0011]

[Effect of device]

 According to the present invention, a ball valve with a strainer having a small flow resistance and therefore a small pressure loss can be obtained, and a ball valve with a strainer capable of performing opening / closing operations without hindrance by interfering with a wall or the like is obtained. .

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an opened 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 a mounting state of the same.

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

[Explanation of symbols]

1 ... Valve box 1a ... Inflow port 1
b ... Outflow port 1c ... Ball storage chamber 1d ... Valve rod penetrating portion 1
e ... Filter storage chamber 1f, 1g ... Stopper 1h ... Filter storage chamber outlet flow path 2 ... Lid 3 ... Valve rod 4
... Handle 4a ... Stop part 5 ... Filter 6
… Plug 7… Seat ring 8… Ball 8
a ... communication hole 8b ... notch 8c ... hole 9
… Retainer 10… Insert V… Ball valve with strainer O… Fully open S… Fully closed W
…wall

Claims (2)

[Scope of utility model registration request] Claims: 1. Outlet inlets are provided on the left and right, a ball storage chamber communicating with the inlets is provided at an intermediate portion, a valve rod penetrating portion is provided at an intermediate upper portion, and a stopper is provided at an upper end of the valve rod penetrating portion. ,
A valve box provided with a filter storage chamber communicating with the ball storage chamber and the outlet in the lower middle portion, a lid screwed to the upper end of the valve rod penetrating portion of the valve box, and the valve of the lid and the valve box. A valve rod penetrating the rod penetrating portion, a handle fixed to the upper end of the valve rod and abutting against the stopper of the valve box at the time of fully opening and fully closing,
A filter attached to the filter storage chamber of the valve box,
A plug screwed to the lower end of the filter storage chamber, a pair of seat rings attached to the left and right ends of the ball storage chamber of the valve box, and a communication hole that is sandwiched between the seat rings and extends from the side surface to the lower surface, In a ball valve with a strainer having a ball that engages with the lower end of the valve stem, the ball storage chamber of the valve box, the valve rod penetrating portion, and the filter storage chamber may be located closer to the center of the inlet and outlet of the valve box. A ball valve with a strainer, which is provided so as to be biased toward the inlet side. 2. A stopper formed at the upper end of the valve rod penetrating portion of the valve box is formed with two stoppers for 180 ° rotation. The stopper portion abuts one stopper when fully opened and the other stopper when fully closed. The ball valve with a strainer according to claim 1, which is formed at the tip.