JP3029114B2 - Valve support structure - Google Patents

Description

The present invention relates to a valve support structure, for example, a check valve for a fluid flowing in a pipe, a check valve having a flow control function, a relief valve, a variable flow control valve, and the like. The present invention relates to a valve body support structure that controls opening and closing of a flow path in a pipe.

(Prior Art) As a conventional valve body support structure, for example, there is one as shown in FIGS. In FIG. 12, reference numeral 1 denotes a check valve having a predetermined valve body support structure. The check valve 1 has a large-diameter hole 2a and a small-diameter hole 2b connected to the large-diameter hole 2a. A cylindrical body 2 forming a flow channel 3 for flowing, and a large-diameter hole portion of the cylindrical body 2
The valve body 5 includes a valve body 5 located inside 2a, a coil spring 6 for supporting the valve body 5, and a retaining ring 7 for fixing an end of the coil spring 6 to the tubular body 2. Reference numeral 2c denotes a mounting portion for mounting the check valve 1 to a device or the like.

As shown in FIG. 12, the valve element 5 is normally urged to the opening of the small diameter hole portion 2b by the contraction of the coil spring 6 in the axial direction, and the flow path 3 is closed. Therefore, the flow in the reverse direction indicated by the white arrow A is stopped. White arrow B in FIG.
With respect to the flow in the positive direction shown in (1), the valve element 5 is opened when the fluid force pushing the valve element 5 becomes larger than the urging force of the coil spring 6, thereby enabling the flow in the positive direction.

(Problems to be Solved by the Invention) However, since the check valve 1 uses the coil spring 6 and generates an urging force due to expansion and contraction of the coil spring in the axial direction, the valve 5 is opened to secure a necessary flow rate. The length L1 of the cylindrical body 2 to which the check valve 1 is assembled is relatively long with respect to the degree. For this reason, there is a problem that the pressure loss of the flow is increased, which hinders free piping design and is expensive.

Further, the valve element 5 has a structure in which the valve element 5 slides in the cylindrical body 2,
For smooth sliding, it is necessary to increase the finishing accuracy of the sliding surface 2d, and special processing such as polishing or honing is required. For this reason, there is also a problem that it becomes very expensive.

Therefore, the present invention provides a valve body support structure that can significantly reduce the axial length of the valve body support structure, facilitates piping design at low cost, has no sliding parts, and does not require special processing. The purpose is to do.

(Means for Solving the Problems) A valve body support structure according to the present invention has a large diameter hole and a small diameter hole connected to the large diameter hole and having a smaller diameter than the large diameter hole.
A pipe forming a flow path, a valve element located in the large-diameter hole and engaged with the small-diameter hole to open and close the flow path, and supporting a peripheral portion of the valve element in a surface direction substantially perpendicular to the axis, The valve body is urged from the large-diameter hole side to the small-diameter hole side, and a plate-like leg convexly curved from the large-diameter hole to the small-diameter hole is engaged with the large-diameter hole. A leaf spring integrally formed with an annular, partially cut-off locking portion, wherein the valve body moves parallel to the axis when the leg of the leaf spring flexes, The valve body is usually characterized in that the valve body is engaged in the small-diameter hole to inhibit the flow from the large-diameter hole to the small-diameter hole.

Further, a pipe body which has a small diameter hole portion which is continuous with the large diameter hole portion and the large diameter hole portion and has a smaller diameter than the large diameter hole portion, and which forms a flow path,
A valve body which is located in the large diameter hole part and is spaced apart from the opening of the small diameter hole part and which can be engaged with the opening of the small diameter hole part to open and close the flow path, and a peripheral part of the valve body in a plane direction substantially perpendicular to the axis. A plate that supports and urges the valve element from the small-diameter hole to the large-diameter hole when the valve element engages with the small-diameter hole. A leaf spring integrally formed with a leg portion and an annular and partially cut-off locking portion for locking the leg portion to the large-diameter hole portion,
When the leg portion of the leaf spring flexes, the valve element moves parallel to the axis, and the valve element normally opens a flow path, from the large-diameter hole side applied to the valve element to the small-diameter hole side. When the fluid force becomes equal to or more than the urging force of the leaf spring, the valve element closes the flow path and adjusts the flow rate.

In the valve body support structure, the valve body is preferably formed integrally with the leaf spring. Further, the leaf spring has a plate-like leg portion divided into a plurality of pieces in the circumferential direction around the valve element,
Preferably, a fluid can pass between adjacent legs. Further, the annular locking portion may be partially cut away.

Here, that the valve element is located in the large diameter hole means that the main part of the valve element is located in the large diameter hole. The term “tube” includes a cylindrical hole formed in a block-shaped casing.

(Operation) The valve body support structure according to claim 1 of the present invention generally has a leaf spring that supports the valve body with the flow path closed in a plane direction substantially perpendicular to the axis, and the valve spring is bent by the leaf spring. Since the urging force is generated on the body, the length in the axial direction is greatly reduced as compared with the case of the coil spring. Also, since there is no sliding portion, no special processing such as high precision and polishing is required, and since a part of the locking portion is cut off, its mounting is easy. Normally, the flow of the fluid from the large-diameter hole to the small-diameter hole is prohibited because the valve element engages with the small-diameter hole to close the flow path. When the fluid force on the side becomes equal to or greater than the urging force of the leaf spring, the fluid flows.

Further, the valve body support structure according to claim 2 of the present invention is provided with a leaf spring that supports the valve body in a surface direction substantially perpendicular to the axis,
Normally, since the valve element is located apart from the frontage of the small-diameter hole so that the valve element opens the flow path, the locking portion of the leaf spring is further formed in a partially cut annular shape. As in the above-described valve body support structure, the axial length is reduced, and mounting is facilitated. If the fluid force applied to the valve body by the fluid flowing from the large-diameter hole to the small-diameter hole is less than the urging force of the leaf spring, the fluid flows from the large-diameter hole to the small-diameter hole or to the small-diameter hole. Both flow from the hole side to the large diameter hole side. On the other hand, the flow rate in the reverse direction from the large-diameter hole to the small-diameter hole increases,
When the fluid force acting on the valve element is equal to or greater than a predetermined urging force, the valve element closes and shuts off the flow path. When the flow path is shut off, the fluid pressure on the large-diameter hole side increases, the valve body remains pressed against the small-diameter hole section, the flow path remains closed, and backflow is prohibited. Further, when the fluid force acting on the valve body becomes equal to or less than the aforementioned urging force, the valve body opens and the fluid flows. That is, it has a flow path adjusting function.

(Example) Hereinafter, an example of the present invention will be described.

1 to 5 are views showing a first embodiment of a valve body support structure according to the present invention.

First, the configuration will be described. In FIG. 1, reference numeral 11 denotes a check valve which is a valve body supporting structure, and the check valve 11 has a large-diameter hole.
A cylindrical member 12 having a small-diameter hole portion 12b connected to the large-diameter hole portion 12a and having a small diameter formed by the large-diameter hole portion, and forming a flow path 13 for flowing a fluid; and a large-diameter hole portion 12a of the cylindrical member 12 And has a conical valve element 15 which is located along the axis C and which is engaged with the small-diameter hole 12b and protrudes from the large-diameter hole to the small-diameter hole.

2 to 4, a peripheral groove 15a is provided in an outer peripheral portion of the valve body 15 in a circumferential direction, and the peripheral groove 15a supports the valve body 15 in a surface direction substantially perpendicular to the axis C. 16 are provided. The leaf spring 16 moves the valve body 15 from the large-diameter hole 12a side to the small-diameter hole 12b.
Side (in the direction of the white arrow A in FIG. 1). The leaf spring 16 has four plate-shaped legs 16a which are divided into four parts around the shaft cotton C in the circumferential direction and which are smoothly curved so as to protrude from the large-diameter hole 12a to the small-diameter hole 12b. Fluid can pass through during 16a. Reference numeral 17 denotes an annular retaining ring as a retaining portion of the leaf spring 16, and the retaining ring 17 is mounted in the large-diameter hole 12a. The retaining ring 17 is formed integrally with the leaf spring 16. The retaining ring 17 supports the valve body 15 along the axis C via the leaf spring 16 and normally the valve body 15 is engaged with the small diameter hole portion 12b by the urging force F of the leaf spring 16 so that the opening 13a of the flow path 13 is formed. Is closed, and as shown by the white arrow A in FIG. 1, the fluid in the opposite direction is prohibited from flowing from the large-diameter hole 12a to the small-diameter hole 12b. Also, as shown by the white arrow B in FIG. 5, when the fluid in the forward direction flows and the fluid force that presses the valve body 15 becomes larger than the urging force F of the leaf spring 16, the valve body 15 becomes small-diameter hole portion. Disengagement with 12b allows the fluid to flow when the flow path is heard.

On the other hand, the retaining ring 17 which is a locking portion of the leaf spring 16 has a structure in which a part thereof is separated, for example, a structure in which a part is cut off. Is getting easier. That is, by cutting off a part of the annular retaining ring 17, the valve body 15 and the leaf spring 16 can be easily attached to the large-diameter hole portion 12a of the tubular member 12.

 Next, the operation will be described.

The check valve 11 of the present invention includes a leaf spring 16 and a retaining ring 17 that normally support the valve body 15 that is engaged with the small-diameter hole portion 12b and closes the flow path 13 in a surface direction substantially perpendicular to the axis C. The valve body
15 is closed by being urged from the large-diameter hole 12a side to the small-diameter hole 12b side by a slight axial bending of the leg 16a of the leaf spring 16.

Normally, since the valve element 15 closes the flow path, the large-diameter hole 12
The flow in the reverse direction from the a side to the small diameter hole 12b side is prohibited.
On the other hand, when the fluid force of the forward fluid flowing from the small-diameter hole portion 12b side to the large-diameter hole portion 12a side becomes larger than the urging force of the leaf spring 16,
The valve element 15 opens the flow path apart from the small-diameter hole portion 12b, and the fluid in the forward direction flows.

In the valve body support structure of the present embodiment, the axial length L2 of the check valve having a diameter of 1/4 inch is 1/4 of the axial length L1 of the conventional check valve 1. , Greatly shortened. In addition, the valve body support structure of the present embodiment has no sliding portion, and no special processing such as polishing of the inner surface of the cylindrical member 12 is required, so that the manufacturing process is easy and quick.

Further, since the retaining ring 17 serving as the locking portion of the leaf spring 16 is formed in an annular shape with a part thereof cut off, attachment of the valve element 15 and the leaf spring 16 to the inside of the tubular member 12 is facilitated.

Next, a second embodiment of the valve body support structure according to claim 1 will be described.

FIGS. 6 and 7 are views showing a main part of a second embodiment of the valve body support structure according to claim 1. In both figures, the same components as those in the first embodiment are denoted by the same reference numerals. I have.

In the main part of the check valve 31, a valve body 15 and a leaf spring 16 are provided.
And a retaining ring 37 as a locking portion thereof are integrally formed, and the integration of these members makes manufacture easy and inexpensive. In addition, since the retaining ring 17 is cut off so as to cut off a part thereof, the diameter of the retaining ring 37 can be easily changed, and the leaf spring 16 can be easily mounted in the large-diameter hole portion 12a of the tubular member 12. .

Next, an embodiment of the valve body support structure according to claim 2 of the present invention will be described.

8 to 11 are views showing an embodiment of a valve body supporting structure according to claim 2, in which the same reference numerals are given to the same components as those in the above-described example.

 First, the configuration will be described.

8 to 10, reference numeral 111 denotes a check valve with an adjusting function, which is a valve body support structure.

The engaging portion 15b that engages with the front opening 12c of the valve body 15 of the check valve 111 with adjustment function is located within the large-diameter hole 12a at a predetermined distance Lo from the opening 12c of the small-diameter hole 12b, The channel 14 can be opened and closed by engaging with the opening 12c of the small diameter hole 12b. The valve element 15 is the same as the valve element 15 of the above-described example shown in FIG. Reference numeral 16 denotes a leaf spring. The leaf spring 16 supports the valve body 15 in a surface direction substantially perpendicular to the axis C, and is attached to the large-diameter hole portion 12a via an annular retaining ring 17 serving as a locking member. . The leaf spring 16 has an urging force Fo for urging the valve body 15 from the small-diameter hole 12b to the large-diameter hole 12a when the valve body 15 moves toward the small-diameter hole 12b by a distance Lo and engages with the small-diameter hole 12b. It has been made like that. The leaf spring 16 is the third or fourth
This is the same component as the leaf spring 16 of the above example shown in the figure. Check valve
The valve element 15 and the leaf spring 16 of 111 are the same parts as the valve element 15 and the leaf spring 16 of the check valve 11 of the above-described example, but the valve 15 and the retaining ring 17 is attached to the large-diameter hole portion 12a such that the distance between the valve element and the opening is a predetermined distance Lo. Thereby, the valve body 15 and the frontage 1
The spring force at the time of engagement with 3a is generated in a direction opposite to the above example.

 Next, the operation will be described.

Also in the present embodiment, since the valve body support structure using the same components as the valve body 15, leaf spring 16 and retaining ring 17 of the above-described example, the axial length of the check valve 111 is the same as described above. It can be greatly shortened, and the manufacturing process is easy, quick, and inexpensive.

In addition, the check valve 111 with the adjusting function usually has the valve body 15
3 is open, if the fluid force applied to the valve body 15 by the fluid flowing from the large-diameter hole portion 12a side to the small-diameter hole portion 12b side is equal to or less than the urging force of the leaf spring 16, the fluid is large-diameter hole. The gas flows from the portion 12a to the small-diameter hole 12b, or from the small-diameter hole 12b to the large-diameter hole 12a. On the other hand, when the flow rate from the large-diameter hole portion 12a side to the small-diameter hole portion 12b side increases and the fluid force acting on the valve body 15 becomes equal to or greater than the urging force Fo, the valve body 15 moves, and as shown in FIG. As shown, in order to adjust the flow rate, the flow path 13 is shut off to prohibit the flow in the reverse direction. That is, the valve support structure 111
Acts as a check valve having a flow control function.

The urging force Fo of the leaf spring 16 is determined by the material, the plate thickness, the plate width, the plate length and the amount of bending of the leaf spring 16, so that the material is determined by the property of the flowing fluid, and is required in a state of flowing in both directions. The flow rate determines the diameter of the flow path and the degree of opening of the valve element, and determines the amount of deflection and the plate length. The spring strength is determined by the required cutoff flow rate, and the plate thickness and the plate width can be appropriately determined. Further, by making the valve body 15 axially symmetrical, the apparent force received by the valve body 15 when the fluid flows can be limited to only the axial direction. That is, if the plurality of legs supporting the valve element 15 are evenly arranged in the circumferential direction of the valve element 15 and the biasing force of the legs of each leaf spring 16 is designed and manufactured to be the same, each leaf spring 16 Becomes the same, and the valve element 15 moves in parallel.

In the above-described embodiment, the case of the check valve and the check valve having the adjusting function has been described.In the present invention, however, the present invention is not limited to the check valve, and a relief valve using a conventional coil spring, The present invention can also be applied to a fluid control device including a valve body and a spring body, such as a variable flow control valve.

(Effects) As described above, according to the valve body support structure of the first aspect of the present invention, a leaf spring that supports the valve body in a plane direction perpendicular to the axis is provided, and the locking portion is provided with one. Since the part is cut off in an annular shape, the axial length of the valve body support structure can be greatly reduced, piping design can be easily done, there is no sliding part, there is no need for special processing, and it is inexpensive In addition to that, the mounting can be facilitated.

Further, according to the valve body support structure of the second aspect, in addition to the effect of the first aspect, it is possible to have a flow rate adjusting function.

[Brief description of the drawings]

1 to 5 are views showing a first embodiment of a valve body support structure according to claim 1 of the present invention. FIG.
The figure is a side view of the valve body, FIG.
FIG. 4 is an enlarged cross-sectional view of the main part, and FIG. 5 is a longitudinal cross-sectional view showing the operation. 6 and 7 are views showing a second embodiment of the valve body support structure according to claim 1 of the present invention. FIG. 6 is a front view of the main part, and FIG. 7 is a sectional view of the main part. It is. 8 to 11 are views showing an embodiment of a valve body supporting structure according to claim 2 of the present invention. FIG. 8 is a longitudinal sectional view, FIG. The figure is a cross-sectional view of the main part, No. 11
The figure is a longitudinal sectional view showing the operation. 12 and 13 are views showing a conventional valve body support structure.
The figure is a longitudinal sectional view, and FIG. 13 is a longitudinal sectional view showing the operation. 11, 31 ... check valve (valve support structure), 12 ... tubular member (tube), 13 ... flow path, 15 ... valve, 16, 116 ... leaf spring (spring), 16a … Leg, 17, 37… retaining ring (locking part), 111… check valve with adjustment function, C… axis.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kenji Mine 1-1-1, Kyobashi, Chuo-ku, Tokyo Inside Bridgestone Flowtech Co., Ltd. (72) Inventor Shinichiro Kato 1-1-1, Kyobashi, Chuo-ku, Tokyo No. Bridgestone Flowtech Co., Ltd. (56) References Japanese Utility Model Showa 51-126428 (JP, U) Japanese Utility Model Showa 50-124622 (JP, U) Japanese Utility Model Showa 50-75431 (JP, U) Japanese Utility Model Showa 60-84870 (JP, U) Japanese Utility Model 1-65990 (JP, U) Japanese Utility Model 63-152972 (JP, U) Japanese Utility Model 62-97390 (JP, U)

Claims (5)

(57) [Claims] 1. A pipe body having a large-diameter hole portion and a small-diameter hole portion connected to the large-diameter hole portion and having a smaller diameter than the large-diameter hole portion, forming a flow path, and a small-diameter hole portion located in the large-diameter hole portion. A valve element that opens and closes the flow path by engaging with the valve element; and supporting the peripheral part of the valve element in a surface direction substantially perpendicular to the axis to urge the valve element from the large-diameter hole side to the small-diameter hole side. A plate formed integrally with a plate-like leg portion convexly curved from the diameter hole portion toward the small-diameter hole portion and an annular and partially cut-off locking portion for locking the leg portion to the large-diameter hole portion. When the leg of the leaf spring flexes, the valve body moves parallel to the axis, and the valve body normally engages the valve body in the small-diameter hole, and the large-diameter hole A valve body support structure characterized in that flow from the side to the small-diameter hole side is prohibited. 2. A pipe having a large-diameter hole, a small-diameter hole connected to the large-diameter hole, and having a smaller diameter than the large-diameter hole, forming a flow path, and an opening of the small-diameter hole in the large-diameter hole. And a valve element which is located at a distance from the opening and which can open and close the flow path by engaging with the opening of the small diameter hole, and supporting the peripheral part of the valve element in a plane direction substantially perpendicular to the axis so that the valve element When engaged, the valve body is urged from the small-diameter hole side to the large-diameter hole side, and a plate-shaped leg convexly curved from the small-diameter hole to the large-diameter hole and the large-diameter leg are formed. A plate spring integrally formed with an annular and partially cut-off locking portion that locks into the hole, wherein the valve body moves parallel to the axis when the leg of the plate spring flexes. Normally, the valve element opens the flow path, and when the fluid force applied to the valve element from the large-diameter hole side to the small-diameter hole side is equal to or greater than the urging force of the leaf spring, the valve element closes the flow path to reduce the flow rate. It is characterized by adjusting Valve body support structure that. 3. The valve body support structure according to claim 1, wherein the valve body is formed integrally with a leaf spring. 4. The valve body supporting structure according to claim 1, wherein the leaf spring has a plurality of plate-shaped legs circumferentially divided around the valve body, and adjacent leg portions. A valve body support structure characterized in that a fluid can pass between them. 5. The valve body support structure according to claim 1, wherein a part of the annular locking portion is cut off.