JP7580761B2 - Foot valve - Google Patents

Description

The present invention relates to a foot valve.

There has long been known a technique for providing strainers to pumps, piping, foot valves, etc., of water supply equipment that draws water from a water source and supplies it to a destination (see, for example, Patent Document 1). This type of strainer has a strainer rib and a flange, and this flange is fixed to the flange of another component with a bolt or the like. The strainer uses the strainer rib to prevent the intrusion of foreign matter.

JP 2015-222102 A

The strainer described above requires that the flanges be provided with seats for bolts and the like for fastening to other components. As such, when designing a strainer, it is difficult to miniaturize the flanges because they are designed to match the other components. One idea is to miniaturize the strainer by miniaturizing the strainer ribs, which do not affect the other components, but this would reduce the opening area of the strainer ribs, which could cause problems such as increased resistance to water passing through the strainer ribs.

SUMMARY OF THE PRESENT EMBODIMENTS An object of the present invention is to provide a foot valve that can ensure a sufficient opening area.

The foot valve of the present invention comprises a valve body having a first flange, a second flange having an opening and a plurality of bolt holes formed around the opening and used for fixing to the first flange, a plurality of first ribs whose ends are provided between adjacent bolt holes in the second flange in the arrangement direction of the plurality of bolt holes, and a plurality of second ribs whose ends are provided on the opening side of the bolt holes of the second flange, wherein the second flange has a recess in its inner peripheral surface that is recessed toward the outer peripheral surface of the second flange, ends of the first rib are formed on the edge of the recess and ends of the second rib are provided on the edge of the inner peripheral surface of the second flange, and the first rib is provided on the outer peripheral surface side of the second flange than the second rib.

According to the present invention, it is possible to provide a foot valve that can ensure a sufficient opening area.

FIG. 2 is a cross-sectional view showing the configuration of a foot valve according to one embodiment of the present invention. FIG. 4 is a perspective view showing the configuration of a strainer used in the foot valve. FIG. FIG. FIG. 11 is a plan view showing a configuration of a strainer according to another embodiment. FIG. 11 is a plan view showing a configuration of a portion of a strainer according to another embodiment.

A foot valve 10 according to one embodiment will be described with reference to Figures 1 to 4. Figure 1 is a cross-sectional view showing the configuration of the foot valve 10. Figure 2 is a perspective view showing the configuration of a strainer 50 used in the foot valve 10. Figure 3 is a plan view showing the configuration of the strainer 50. Figure 4 is a cross-sectional view showing the configuration of the strainer 50, specifically, showing the state cut along line F4-F4 shown in Figure 3.

As shown in FIG. 1, the foot valve 10 includes a valve body 20, a strainer 50, a lever 60, and a fixing device 70. The strainer 50 of the foot valve 10 is fixed to the flange of the valve body 20 by the fixing device 70.

The valve body 20 has a flange to which the strainer 50 is fixed by the bolts 71 of the fixing device 70. The valve body 20 has, for example, a valve seat member 21, a valve body 30, and a valve box 40.

The valve seat member 21 has a first opening 22. A part of the valve seat member 21 forms a valve seat against which the valve body 30 abuts. The outer periphery of the valve seat member 21 forms a flange 21a. A plurality of first bolt holes 25 are formed in the flange 21a, in which bolts 71 (described later) of the fixing device 70 are placed. The plurality of first bolt holes 25 are formed around the first opening 22. The plurality of first bolt holes 25 are arranged, for example, at equal intervals.

The valve seat member 21 also rotatably supports, for example, both the valve body 30 and the lever 60. The valve seat member 21 includes, for example, a first support portion 23 and a second support portion 24.

The first support portion 23 is provided inside the flange 21a on one main surface of the valve seat member 21. The first support portion 23 rotatably supports the valve body 30. The second support portion 24 is provided inside the flange 21a on the other main surface of the valve seat member 21. The second support portion 24 rotatably supports the lever 60.

The valve body 30 is supported by the first support portion 23 so as to be rotatable between a position where the first opening 22 is closed and a position where the first opening 22 is opened.
The valve body 30 includes, for example, a valve body main body 31 and a rotating shaft 32. The valve body main body 31 has a size capable of closing the first opening 22. An annular groove 31a is formed in the main surface of the valve body main body 31 facing the valve box 40. An O-ring 31b is provided in the groove 31a.
The rotating shaft 32 is provided on the valve body 31. The rotating shaft 32 is rotatably supported by the first support portion 23.

The valve box 40 is provided on one of the main surfaces of the valve seat member 21. The valve body 30 is disposed inside the valve box 40. The valve box 40 includes, for example, a valve box main body 41 formed in a cylindrical shape and a flange 42 formed at one end of the valve box main body 41.

The flange 42 has a plurality of second bolt holes 43 in which the bolts 71 are placed. The second bolt holes 43 are arranged, for example, at equal intervals. The flange 42 is fixed to the valve seat member 21 by a fixing device 70.

In the valve body 20 configured in this manner, the flange 21a and the flange 42 form the first flange 20a to which the strainer 50 is fixed.

As shown in Figures 1 to 4, the strainer 50 has a second flange 51 and a strainer rib 52 provided on the second flange 51.

The strainer 50 is fixed to the first flange 21a of the valve body 20 by a fastener 70. The strainer 50 allows water to pass through the strainer ribs 52 and prevents the intrusion of foreign matter.

2, the second flange 51 has a second opening 55 and a plurality of third bolt holes 56. The second opening 55 faces the first opening 22 when the strainer 50 is fixed to the valve seat member 21. The plurality of third bolt holes 56 are formed between the second opening 55 and the outer peripheral surface of the second flange 51. The plurality of third bolt holes 56 are arranged, for example, at equal intervals.

As shown in Figs. 2 and 3, the second flange 51 has a plurality of recesses 51c formed therein. The recesses 51c are formed by recessing the inner circumferential surface 51b toward the outer circumferential surface of the second flange 51. The recesses 51c are formed in the region of the inner circumferential surface 51b between the two third bolt holes 56.

As shown in FIG. 2, the strainer rib 52 has a plurality of first ribs 57, a plurality of second ribs 58, and a reinforcing portion 53. In this embodiment, a first rib 57 is provided on each side of one second rib 58. By providing a first rib 57 on each side of the second rib 58, a gap is provided between the second rib 58 and the adjacent first rib 57 in the arrangement direction of the second ribs 58 and in the direction from the center of the second flange 51 to the outside. For this reason, it is preferable to provide a first rib 57 on each side of one second rib 58.

The end 57a of the first rib 57 is provided between adjacent third bolt holes 56 in the arrangement direction of the multiple third bolt holes 56. Note that the end 57a of one first rib 57 may be arranged between adjacent third bolt holes 56, or two or more end parts 57a of the first ribs 57 may be arranged. The end parts 57a are provided at positions that avoid the fastener 70. In the example of this embodiment, the end parts 57a of two first ribs 57 are arranged between two third bolt holes 56. The end parts 57a of the first ribs 57 are formed on the edge of the recess 51c. The end parts 57a of the multiple first ribs 57 are arranged, for example, on a circle of a predetermined radius from the center of the second flange 51.

The first ribs 57 are formed in a shape that extends from the second flange 51 to one side. Here, the one side refers to the side that is away from the valve body 20 when the strainer 50 is fixed to the valve body 20. The first ribs 57 extend, for example, from the second flange 51 along the axial direction of the second opening 55 or along a direction that is inclined relative to the axial direction of the second opening 55, and are formed in a shape in which the side opposite the second flange 51 is curved toward the center of the second opening 55.

The end 58a of the second rib 58 is provided on the second opening 55 side of the third bolt hole 56. The end 58a of one second rib 58 may be provided on the second opening 55 side of the third bolt hole 56, or two or more end 58a of the second rib 58 may be provided. The end 58a is provided at a position that avoids the fixing device 70. In this embodiment, the end 58a of one second rib 58 is provided on the second opening 55 side of the third bolt hole 56. The end 58a is provided on the edge of the inner circumferential surface 51b. The end 58a of the multiple second ribs 58 is arranged on a circle of a predetermined radius from the center of the second flange 51.

The second ribs 58 are formed in a shape that extends from the second flange 51 to one side. The second ribs 58 extend, for example, along the axis of the second opening 55 or along a direction that is inclined toward the axial direction of the second opening 55, and the end portion opposite the second flange 51 is formed in a shape that curves toward the center of the second flange 51.

In addition, the height of the multiple second ribs 58 from the second flange 51 is set to the same height as the height of the multiple first ribs 57 from the second flange 51.

The reinforcing portion 53 is formed, for example, in a plate shape. The reinforcing portion 53 is provided at one end of the plurality of first ribs 57 opposite the second flange 51, and at one end of the plurality of second ribs 58 opposite the second flange 51. The reinforcing portion 53 faces the second opening 55, for example, in the axial direction of the second opening 55.

The strainer 50 configured in this manner is made of, for example, resin, stainless steel, or cast iron. The material from which the strainer 50 is made is not limited. The second flange 51, the strainer rib 52, and the reinforcing portion 53 are, for example, integrally formed.

The lever 60 is configured to be capable of opening and closing the valve body 30 when operated. The lever 60 is provided, for example, on the second flange 51. The lever 60 includes, for example, a lever body 61 and an abutment portion 62.

One end of the lever body 61 is supported by the second support portion 24 so as to be rotatable in a direction toward the valve body 30 and in a direction away from the valve body 30. A part of the lever body 61 is movably disposed between two adjacent ribs of the strainer ribs 52. The other end of the lever body 61 is disposed outside the strainer 50.

The abutment portion 62 is provided at a position facing the valve body 30 in the rotational direction of the lever body 61. The abutment portion 62 is formed in a shape that protrudes from the lever body 61 toward the valve body 30. The abutment portion 62 moves the valve body 30 when the lever body 61 rotates toward the valve body 30 and abuts against the valve body 30.

The fixing device 70 fastens the flange 21a, the flange 42, and the second flange 51. The fixing device 70 includes, for example, a bolt 71 and a nut 72. The bolt 71 is inserted into the second bolt hole 43 of the valve box 40, the first bolt hole 25 of the valve seat member 21, and the third bolt hole 56 of the strainer 50. The head 71a of the bolt 71 is disposed, for example, on the flange 42. The multiple nuts 72 are disposed, for example, on the second flange 51.

The strainer 50 thus configured has a plurality of first ribs 57 whose ends 57a are provided between adjacent third bolt holes 56 of the second flange 51, and a plurality of second ribs 58 whose ends 58a are provided on the second opening 55 side of the third bolt holes 56 of the second flange 51.

In this way, since the first rib 57 is provided closer to the outer peripheral surface of the second flange 51 than the second rib 58, a gap through which water can flow can be formed between the first rib 57 and the second rib 58. Furthermore, since the total gap between adjacent first ribs 57 can be increased, the gap between adjacent first ribs 57 can be maintained at a desired gap even if the number of first ribs 57 is increased. Here, the desired gap is a gap that is set based on the size of foreign matter that is required for the strainer 50 to prevent intrusion. As a result, the total gap between adjacent first ribs 57 can be increased.

As a result, a gap through which water can flow can be formed between the first rib 57 and the second rib 58, and the total gap between adjacent first ribs 57 can be increased, thereby increasing the opening area of the strainer rib 52.

Therefore, even if the shape of the flange 51 and the height of the strainer rib 52 are the same, the opening area of the strainer rib can be made larger than that of a conventional strainer, so if there is excess opening area, it is possible to reduce the height of the strainer rib 52 from the second flange 51 to make it smaller. By making the strainer 50 smaller, it is possible to make the foot valve 10 smaller, lighter, and more cost-effective to manufacture.

Furthermore, since the first ribs 57 are provided on both sides of one second rib 58, the number of adjacent first ribs 57 and second ribs 58 can be increased, thereby increasing the opening area of the strainer 50.

Furthermore, since the gap between adjacent strainer ribs 52 can be maintained at the desired gap, in other words, the gap set based on the size of the foreign matter to be prevented from entering, which is required of the strainer, it is possible to movably position the lever body 61 between adjacent ribs without having to thin the lever body 61 from its previous thickness.
Furthermore, the strainer rib 52 includes a reinforcing portion 53. This can improve the strength of the strainer 50.

As described above, the strainer 50 and foot valve 10 according to the embodiment can increase the opening area of the strainer 50.

The present invention is not limited to the above-described embodiment. For example, in the above example, the third bolt holes 56 and the multiple second ribs 58 are configured to be the same in number, but this is not limiting. The third bolt holes 56 may be formed to match the number of bolts 71 required to secure the strainer 50 to the valve seat member 21. For example, as shown in FIG. 5, the number of the multiple second ribs 58 may be less than the number of the third bolt holes 56.

In the above example, the first rib 57 is formed on both sides of the second rib 58 in the circumferential direction of the second flange 51, but this is not limiting. In another example, as shown in FIG. 6, multiple second ribs 58 may be arranged adjacent to each other.

In FIG. 6, as an example, two second ribs 58 are arranged adjacent to each other, and two first ribs 57 are arranged adjacent to each other on either side of the second ribs 58. By arranging multiple second ribs 58 adjacent to each other, a large space can be secured for arranging the head 71a of the bolt 71 or the nut 72. Therefore, by arranging multiple second ribs 58 adjacent to each other in the circumferential direction according to the size of the head 71a of the bolt 71 or the nut 72, a space according to the size of the head 71a of the bolt 71 or the nut 72 can be secured.

In addition, in the above example, the shape formed by the line connecting the ends 57a of the multiple first ribs 57 on the second flange 51 side, and the shape formed by the line connecting the ends 58a of the multiple second ribs 58 on the second flange 51 side are circular, but this is not limiting.

In another example, the shape formed by the line connecting the ends 57a of the multiple first ribs 57 on the second flange 51 side and the shape formed by the line connecting the ends 58a of the multiple second ribs 58 on the second flange 51 side may be rectangular. Alternatively, the shape formed by the line connecting the ends 57a of the multiple first ribs 57 on the second flange 51 side and the shape formed by the line connecting the ends 58a of the multiple second ribs 58 on the second flange 51 side may be a polygon other than a rectangle, such as a hexagon, or an ellipse.

In the above example, the strainer 50 is described as being used in the foot valve 10, but is not limited to this. The strainer 50 may be used in other components of the fluid circuit, such as valves other than the foot valve, pumps, and pipes.

In the above example, the configuration in which the three flanges 21a, 42, and 51 are fixed together has been described as an example, but this is not limiting. In other examples, the flanges 21a and 51 may be fixed together, or the flanges 42 and 51 may be fixed together. In other words, the flange 51 may be fixed to at least one of the flanges 21a and 42.

The present invention is not limited to the above-mentioned embodiment, and can be modified in various ways without departing from the gist of the present invention. The embodiments may be combined as appropriate, and in that case, the combined effect can be obtained. Furthermore, the above-mentioned embodiment includes various inventions, and various inventions can be extracted by combinations selected from the multiple components disclosed. For example, if the problem can be solved and the effect can be obtained even if some components are deleted from all the components shown in the embodiment, the configuration from which the components are deleted can be extracted as an invention.
The following provides a description equivalent to the invention described in the original claims of this application.
[1] A flange having an opening and a plurality of bolt holes formed around the opening;
a strainer rib including a plurality of first ribs whose ends are provided between adjacent bolt holes in the arrangement direction of the plurality of bolt holes of the flange, and a plurality of second ribs whose ends are provided on the opening side of the bolt holes of the flange;
A strainer comprising:
[2] The strainer described in [1], wherein the first rib is provided on both sides of the second rib.
[3] A valve body having a first flange;
a strainer including: a second flange having an opening and a plurality of bolt holes formed around the opening and used for fixing to the first flange; a plurality of first ribs each having an end provided between adjacent bolt holes in the arrangement direction of the plurality of bolt holes of the second flange; and a plurality of second ribs each having an end provided on the opening side of the bolt holes of the second flange;
A foot valve comprising:
[4] The foot valve according to [3], wherein the first rib is provided on both sides of the second rib.

10...foot valve, 20...valve body, 21...valve seat member, 22...first opening, 23...first support portion, 24...second support portion, 25...first bolt hole, 30...valve disc, 31...valve disc body, 31a...groove, 31b...O-ring, 32...rotating shaft, 40...valve box, 41...valve box body, 42...flange, 43...second bolt hole, 50...strainer, 51...second flange, 51b...inner surface, 51c...recess, 52...strainer rib, 53...reinforcement portion, 55...second opening, 56...third bolt hole, 57...first rib, 57a...end portion, 58...second rib, 58a...end portion, 60...lever, 61...lever body, 62...contact portion, 70...fixing device, 71...bolt, 71a...head, 72...nut.

Claims (2)

a valve body having a first flange;
a strainer including: a second flange having an opening and a plurality of bolt holes formed around the opening and used for fixing to the first flange; a plurality of first ribs each having an end provided between adjacent bolt holes in the arrangement direction of the plurality of bolt holes of the second flange; and a plurality of second ribs each having an end provided on the opening side of the bolt holes of the second flange;
Equipped with
the second flange has an inner circumferential surface thereof having a recess recessed toward an outer circumferential surface thereof,
an end of the first rib is formed on an edge of the recess;
an end portion of the second rib is provided on an edge portion of the inner circumferential surface of the second flange,
The first rib is provided closer to the outer circumferential surface of the second flange than the second rib . The foot valve of claim 1 , wherein the first rib is provided on either side of the second rib.