JPH0637664U - Reed valve - Google Patents

Abstract

(57) [Summary] [Objective] To provide a reed valve capable of improving the durability of the reed. [Structure] The circulation hole 2 is provided on the outlet side of the circulation hole 2 of the case 1.
A lead 5 for opening and closing is provided. The elastic member 3 is attached to the peripheral portion of the outlet of the flow hole 2. The elastic member 3 contacts the lead 5 when the valve is closed, and secures the sealability of the lead 5 with respect to the flow hole 2. The elastic member 3 has a groove 14 formed at a portion corresponding to the peripheral end of the lead 5. Then, the lead 5 opens and closes the flow hole 2 according to the pressure of the acting fluid. Since the peripheral edge portion of the lead 5 is not in contact with the elastic member 3 due to the concave groove 14, even when the lead 5 is seated, the peripheral edge portion of the lead 5 is not subjected to impact force. Therefore, it is possible to prevent the peripheral end portion of the lead 5 from being damaged by the impact force generated when sitting. In addition, if necessary, the elastic member 3 is provided with the concave groove 1
You may form the relief groove which opens 4 outside.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a reed valve, and more particularly to a reed valve that opens and closes a reed according to the pressure of a fluid that acts to allow the fluid to flow in one direction.

[0002]

[Prior art and its problems]

 Conventionally, as this type of reed valve, one shown in FIG. 6 is known. That is, the reed valve shown in FIG. 6 is attached to a case 21 having a fluid flow hole 22 and a reed 25 that opens and closes the flow hole 22 and an opening peripheral portion of the flow hole 22 on the reed 25 side. An elastic member 23 that secures a sealing property by contacting with the lead 25 is provided. The lead 25 opens and closes the flow hole 22 in response to the pressure of the fluid acting on the lead 25, whereby the fluid is prevented from flowing. I try to distribute in the direction.

In FIG. 6, a case 21 has two fluid passage holes 22 formed therein, and a fluid inlet is formed inside the case 21 and an fluid outlet is formed outside the case 21. However, the inside and the outside of the case 21 are electrically connected.

A lead 25 is arranged on the outlet side of the flow hole 22 of the case 21. The lead 25 is formed in a thin plate and has elasticity, and the tip end thereof is cut out to be divided into two parts. The lead 25 is fixed to the case 21 at one end, which is the root portion, in a state where the divided two end portions are arranged so as to close the outlet of the through hole 22 of the case 21. Thus, the tip of the lead 25 can swing around the root.

A sheet-shaped elastic member 23 is attached to the peripheral portion of the outlet of the flow hole 22. The elastic member 23 is positioned so that the lead 25 abuts when the valve is closed, and the elastic member 23 ensures good sealing of the lead 25 with respect to the circulation hole 22.

Reference numeral 29 denotes a stopper, which is fixed to the case 21 in a state of having a curved shape and having one end thereof aligned with the root of the lead 25. By being positioned outside the lead 25, The lift amount of the lead 25 is regulated. Further, 28 is a screw, and the lead 25 and the stopper 29 are fixed to the case 21 by screwing the screw 28.

In the reed valve configured as described above, when the fluid pressure acts on the reed 25, the reed 25 is lifted by the action of the pressure to open the communication hole 22, and thus the inside of the case 21 is closed. The fluid will flow out to the outside through the circulation hole 22. Further, when the fluid tries to flow in the reverse direction, the lead 25 closes the flow hole 22 by its elastic force, thereby preventing the reverse flow of the fluid.

Here, in the conventional reed valve, as shown in FIG. 7, the main part of the cross section taken along the line CC in FIG. It was necessary to perform rounding by rounding the inside of 25 to form a rounded surface.

That is, the peripheral end portion of the lead 25 is a portion where the impact force is likely to be concentrated when the lead 25 is seated on the elastic member 23, so that the lead 25 is easily cracked or chipped. Therefore, by rounding the peripheral end surface of the lead 25, when the lead 25 is seated on the elastic member 23, the tip end portion of the peripheral end portion of the lead 25 is not subjected to impact force. .

However, in recent years, it has been required to use the lead 25 having a small thickness or to form a plurality of leads by stacking them. Accordingly, it has become technically difficult to form roundness on the peripheral end surface of the lead 25.

That is, if the thickness of the lead 25 is reduced, the lead 25 is likely to be deformed. Therefore, when the lead 25 is subjected to end face finishing by means such as barrel polishing, the lead 25 is deformed by its polishing force. However, it becomes impossible to perform sufficient R processing on the peripheral end surface of the lead 25.

Therefore, when the lead 25 whose peripheral end face is not sufficiently rounded is used as described above, the impact force is concentrated on the peripheral end portion of the lead 25 when seated, as described above. There is a problem that the lead 25 is likely to be cracked or chipped, and durability is deteriorated.

The present invention solves the above problems, and an object of the present invention is to provide a reed valve capable of improving durability even when a reed whose end surface is not finished is used. And

[0014]

[Means for solving problems]

 In order to solve the above-mentioned problems, the present invention provides a case having a fluid passage hole, a lead for opening and closing the fluid passage hole according to the pressure of the fluid, and a peripheral portion of an outlet of the passage hole. And a resilient member that comes into contact with the reed when the valve is closed, wherein the resilient member has a groove formed at a portion corresponding to a peripheral end portion of the reed. Is what you are doing.

[0015]

[Action]

 This device adopts the above means, and when the fluid pressure acts on the reed, the reed opens and closes the circulation hole of the case, thereby allowing the fluid to flow from the circulation hole or prevent backflow. As a result, the fluid will flow in only one direction.

Here, when the lead is seated on the elastic member, the impact force at the time of seating does not act on the peripheral end portion of the lead.

That is, since the peripheral end portion of the reed is open due to the presence of the groove even when the valve is closed, it is not in contact with the elastic member. The impact force when seated does not reach the peripheral edge of the lead.

Therefore, when the lead is seated, it is possible to prevent the impact force from being concentrated on the peripheral end portion of the lead, and as a result, it is possible to prevent the peripheral end portion of the lead from being cracked or chipped. The durability of the can be improved.

[0019]

【Example】

 Embodiments of the present invention shown in the drawings will be described below. FIG. 1 is a diagram showing an embodiment of a reed valve according to the present invention. That is, the reed valve shown in FIG. 1 is attached to a case 1 having a fluid flow hole 2, a reed 5 that opens and closes the flow hole 2 in accordance with the pressure of the fluid, and a peripheral portion of an outlet of the flow hole 2, An elastic member 3 is provided which abuts against the lead 5 when the valve is closed to ensure a sealing property therebetween, and the elastic member 3 has a groove 4 at a portion corresponding to the peripheral end of the lead 5. Are formed.

In FIG. 1, the case 1 has fluid passage holes 2 formed at two locations. With the passage holes 2, a fluid inlet is provided inside the case 1 and an fluid inlet is provided outside the case 1. Each of the outlets is opened so that the inside and the outside of the case 1 are electrically connected to each other via the flow hole 2.

At the outlet side of the flow hole 2 of the case 1, a lead 5 as shown in FIG. 3 is arranged. The lead 5 is formed in a thin plate shape and has elasticity, and is divided into two parts by cutting out the tip thereof. The lead 5 is fixed at its root end to the case 1 in a state in which the two-divided tip end side is arranged to close the outlet of the through hole 2 of the case 1. The tip portion of the lead 5 is swingable around the root portion.

At this time, holes 7 are formed at two positions at the root of the lead 5, and the holes 7 are aligned with the two screw holes 6 formed in the case 1 by a screw (not shown). By screwing, the root of the lead 5 is fixed to the case 1.

A sheet-shaped elastic member 3 is attached to the peripheral portion of the outlet of the through hole 2. The elastic member 3 is positioned so that the outer peripheral portion of the lead 5 comes into contact when the valve is closed, and the elastic force of the elastic member 3 improves the sealing property of the lead 5 with respect to the flow hole 2, and The impact force generated when the lead 5 is seated is reduced.

Further, the elastic member 3 is provided with a concave groove 4 at a portion corresponding to the peripheral end portion of the lead 5 so as to surround the outlet of the flow hole 2, and by the concave groove 4, the lead groove is closed when the valve is closed. The peripheral edge portion 5 is not in contact with the elastic member 3.

Particularly, in this case, it is desirable that the shape of the concave groove 4 is formed so that the cross section has a U-shape as shown in the cross section taken along the line AA in FIG.

Although not shown, the case 1 may be provided with a stopper located outside the lead 5 if necessary. The stopper has a curved shape and is fixed to the case 1 with its one end aligned with the root of the lead, and regulates the lift amount of the lead 5.

Next, the operation of the above will be described. With this reed valve, due to the above configuration, a pressure difference is generated between the inside and the outside of the case 1 with the reed 5 as a boundary, and the pressure of the fluid inside the case 1 is higher than the pressure of the outside fluid. When it becomes relatively large, due to the pressure difference of the fluid, the lead 5 lifts to open the circulation hole 2, and as a result, the fluid inside the case 1 flows out to the outside through the circulation hole 2. Come to do.

Further, when the fluid outside the case 1 tries to return to the inside of the case 1, the elastic force of the lead 5 causes the reed 5 to close the through hole 2, so that the reverse flow of the fluid is blocked. . As a result of the above, the fluid will flow from the inner side of the case 1 to the outer side in only one direction.

Further, in this reed valve, the impact force generated at the time of sitting is not concentrated on the peripheral end portion of the reed 5.

That is, in the elastic member 3 with which the reed 5 abuts when the valve is closed, the concave groove 4 is formed along the peripheral end of the reed 5, whereby the peripheral edge of the reed 5 is closed when the valve is closed. Since the portion is open to the elastic member 3, the peripheral end portion of the lead 5 does not collide with the elastic member 3 when the lead 5 is seated.

Therefore, even if the peripheral end surface of the lead 5 is not rounded by applying an end surface finish, the impact force at the time of sitting is not concentrated on the peripheral end portion of the lead 5, but is relaxed. This prevents the leads 5 from being cracked or chipped by the impact force.

Further, in particular, by forming the groove 4 so that its cross section has a U shape, even if a strong impact force is applied when the lead 5 is seated, the elastic member 3 is less likely to be deformed. The elastic member 3 can be suppressed, and the elastic member 3 is less likely to crack, and the durability of the elastic member 3 is improved.

Next, a modified example of the above embodiment will be described with reference to FIG. That is, the reed valve shown in FIG. 4 is attached to a case 1 having a fluid flow hole 2, a reed (not shown) that opens and closes the flow hole 2 in accordance with the pressure of the fluid, and a peripheral portion of an outlet of the flow hole 2. An elastic member 13 is provided for contacting the reed when the valve is closed to ensure the sealing property therebetween, and the elastic member 13 has a groove 14 formed at a portion corresponding to the peripheral portion of the reed. And an escape groove 14a for opening the concave groove 14 to the outside. Note that, in FIG. 4, components having the same configurations as those of the above-described embodiment are designated by the same reference numerals, and thus detailed description of the configuration will be omitted.

In FIG. 4, the elastic member 13 has a concave groove 14 formed in a portion corresponding to the peripheral end portion of the lead (not shown). The concave groove 14 allows the peripheral edge portion of the lead to be closed when the valve is closed. Are not in contact with the elastic member 13.

Further, the elastic member 13 is formed with recessed escape grooves 14a that open the recessed grooves 14 to the outside at a plurality of required positions, and the escape grooves 14a form the recessed grooves 14a. It has electrical continuity with the outside.

In particular, in this case, as shown in FIG. 5 along the line BB in FIG. 4, the concave groove 14 has its bottom surface aligned with the end surface of the case 1 on the outlet side, or the case 1. It is desirable to form it so that it is slightly higher than the end face on the outlet side.

Then, as described above, by forming the escape groove 14a that opens the concave groove 14 to the outside in the elastic member 13, the concave groove 14 is formed of carbon, condensed water, or the like. Will be able to prevent it from being buried.

For example, when the reed valve is attached to the intake side or the exhaust side of the engine, the fluid often contains dust formed of carbon, condensed water, or the like. By repeating the opening and closing of the leads, dust in the fluid enters the inside of the concave groove 14 of the elastic member 13 because the concave groove 14 is electrically connected to the outside by the escape groove 14a. The dust that has entered the concave groove 14 is discharged to the outside via the escape groove 14a.

Therefore, in this reed valve, since the concave groove 14 of the elastic member 13 is not filled with dust during use, the close contact between the reed and the elastic member 13 is always maintained when the valve is closed. It is ensured satisfactorily, and as a result, the sealing property of the lead with respect to the flow hole 2 is improved.

In the above case, the shapes of the concave grooves 4 and 14 are not particularly limited. That is, when the grooves 4 and 14 have a rectangular cross-sectional shape, when the lead 5 is seated, the stress against the impact force at the time of seating is concentrated on the corners of the bottoms of the grooves 4 and 14. Although the inner peripheral edge portions of the elastic members 3 and 13 may be cracked or chipped, in order to relieve the stress generated at the bottoms of the recessed grooves 4 and 14, as shown in the above embodiment, It is desirable that the concave grooves 4 and 14 have a U-shaped cross-section so that the bottoms of the concave grooves 4 and 14 are rounded.

[0041]

[Effect of device]

 As described above, according to the present invention, the elastic member, which is attached to the peripheral portion of the outlet of the through hole and which the reed abuts when the valve is closed, has the concave groove formed at the portion corresponding to the peripheral end of the reed. Therefore, the recessed groove can prevent the impact force from acting on the peripheral end portion of the lead when the lead is seated.

Therefore, even if the end surface finish which has been conventionally required is not applied to the lead, it is possible to prevent the lead from being cracked or chipped due to the impact force at the time of sitting, and as a result, the durability of the lead is improved. The effect is that you will be able to.

[Brief description of drawings]

FIG. 1 is a diagram illustrating an embodiment of the present invention.

FIG. 2 is a diagram showing a cross-sectional view taken along the line AA in FIG.

FIG. 3 is a diagram showing a state in which leads are attached to a case.

FIG. 4 is a diagram illustrating a modified example of the present invention.

5 is a diagram showing a cross-sectional view taken along line BB in FIG.

FIG. 6 is a diagram showing a conventional example.

7 is a diagram showing a main part of a cross section taken along line CC of FIG.

[Explanation of symbols]

 1, 21 ... Case 2, 22 ... Circulation hole 3, 13, 23 ... Elastic member 4, 14 ... Recessed groove 14a ... Relief groove 5, 25 ... Lead 6 ... Screw hole 7 ... Hole 28 …… Screw 29 …… Stopper

Claims (1)

[Scope of utility model registration request] 1. A case (1) having a fluid flow hole (2), a lead (5) for opening and closing the fluid flow hole (2) according to the pressure of the fluid, and an outlet of the fluid flow hole (2). The lead (5) is attached to the peripheral portion and when the valve is closed.
A reed valve provided with elastic members (3) and (13) that come into contact with the elastic member (3) and (13), wherein the elastic members (3) and (13) have a groove (4) at a portion corresponding to a peripheral end portion of the reed (5). ) (1
4) A reed valve characterized by being formed.