JP2992494B2 - Intake and exhaust valves - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a suction / discharge valve provided with a lever for forcibly opening a valve body.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 13 and 14, this type of intake / exhaust valve a is provided with an adjusting rod d disposed above a valve rod c for adjusting the lift of a valve body b. A structure is employed in which the valve body b is forcibly opened via the valve rod c by pressing the adjustment rod d with the lever f provided on the top part e so as to protrude and retract from the main body top e. Have been. In the mounting structure of the lever f at the top e, the ring-shaped base j of the support bracket i of the lever f is provided between the flange g provided around the bottom of the top e and the support nut h of the adjustment rod d. And a pair of upright walls k, k1 projecting upward in the diameter direction of the ring-shaped base j, and side walls l, l1 provided on the left and right sides of the lever f. The lever f is rotatably provided through the end of the work spring m.

[0003]

Therefore, in mounting the lever f, a tool for tightening the nut is required, and it is necessary to check the tightening of the support nut h. The workability was poor due to the large number of parts, i. Also, regardless of the installation state of the suction / discharge valve a, the lever f can be rotated around the top e so that the lever f can be operated at a free position. In order to secure this gap and to prevent the adjustment rod d from coming off, high precision is required for the pitch of the screw cut on the top e and the upper diameter of the support nut h. Also, as mentioned above,
Because of the nut tightening, depending on the installation location of the suction and discharge valve a, the support nut h may be loosened and removed due to external factors such as vibration, and the suction and discharge valve a may not function.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention provides a support fitting comprising a hook formed by a C-shaped snap ring, a pair of support plates disposed opposite to the hook, and the support fitting. Assemble a lever that rotatably mounts a support shaft to a shaft hole provided in the support plate, and slidably attach a latching portion to a groove formed on the outer periphery of the top of the main body from which the adjustment rod protrudes. This simplifies the work of assembling the lever to the main body.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a main body of an intake / exhaust valve in which a flow path of an inlet 2 and an outlet 3 are perpendicular to each other.
On the upper side, the primary (inlet 2) side channel 5 and secondary (outlet 3)
A spring box 8 provided with an outlet 3 is joined via a diaphragm 7 partitioned into a side flow path 6, and the secondary side flow path 6 is placed on the spring box 8.
And a cylindrical adjustment chamber 9 which is sectioned and formed.

The diaphragm 7 has an opening 10 formed in the center, a cylindrical valve port guide 11 is inserted into the opening 10, and a hollow portion of the valve port guide 11 is formed as a valve port 12. The primary opening end of the valve port guide 11 forms a valve seat 13.

Further, the valve port guide 11 is connected to the one of the diaphragms 7.
A disk-shaped diaphragm holder 14 joined to the next surface is provided around the valve seat 13 with a step.

A disk-shaped diaphragm holder 15 is also joined to the secondary surface of the diaphragm 7 in correspondence with the diaphragm holder 14, and the diaphragm holder 15 has an opening 16 corresponding to the diaphragm 7. Is provided in the center. In addition, an annular concave portion 17 is formed around the opening 16 on the non-joining surface of the diaphragm retainer 15, and the outer peripheral portion 18 of the concave portion 17 is formed in an inclined shape such that the diameter decreases as going upward.

The secondary opening end 13 of the valve port guide 11
a is bent so as to be hooked on the outer concave portion 17, and the bent portion 13 a is used to hold the primary-side diaphragm holder 1.
The diaphragm 7 is held between 4 and 15.

Reference numeral 19 denotes a valve stem guide integrally formed of plastic. The valve stem guide 19 is provided at the center of a cylindrical outer ring portion 20 having a predetermined diameter and a cylindrical guide portion 21 longer than this.
Are supported on the inner wall of the outer ring 20 by supporting pieces 22, 22a,... Projecting radially from the outer wall of the guide 21.

The outer ring portion 20, the guide portion 21, and the support piece
The hollow portions defined by 22, 22a are formed as flow passages 23, 23a which penetrate vertically, and are formed in the lower outer wall of the outer ring portion 20 corresponding to the flow passages 23, 23a. Matched nail pieces
24, 24a ... protruding.

Since the outer wall of the outer ring portion 20 having the claw pieces 24, 24a... Is easily elastically deformed in correspondence with the hollow portions 23, 23a.
Even if the outer surfaces of the claw pieces 24, 24a are inclined, they can be easily fitted into the concave portions 17, and the valve stem guide 19 is fixed to the diaphragm holder 15 on the secondary side. In the fixed state of the valve stem guide 19,
Since the joining surfaces of the outer peripheral portion 18 and the claw pieces 24, 24a are mutually inclined, they do not come off.

In the guide portion 21, the outer wall of a portion protruding longer than the outer ring portion 20 is cut into a thin wall to form a small diameter portion,
The base end of the small diameter portion is a spring receiver 25.

Numeral 26 designates a valve element which is provided on the valve seat 13 so as to be detachable. A valve rod 27 projecting toward the secondary side is provided upright at the center of the valve element 26. Slidably penetrates the guide portion 21.

The valve stem 27 is provided with a flange-shaped spring receiver 28 at the tip,
A lift spring 29 is interposed between the spring receiver 28 and a spring receiver 25 provided on the valve rod guide 19 to urge the valve body 26 to close.

Also, the secondary side diaphragm retainer 15 and 2
An adjusting spring 30 is interposed between the upper surfaces of the secondary flow paths 6 to urge the diaphragm 7 so as to press the diaphragm 7 toward the primary flow path 5.

The control chamber 9, which is the top 9 of the main body 1, has an opening formed at the top, communicates with the secondary flow path 6 at the center of the bottom 31, and has a corresponding through hole 32 formed on the valve stem 27. I have.

Reference numeral 33 denotes an adjusting rod connected to the valve rod 27 for forcibly opening the valve element 26. The adjusting rod 33 is longer than the adjusting chamber 9,
It is slidably inserted through the through-hole 32, and its lower end is spaced apart on the valve rod 27.

The adjusting rod 33 is provided with upper and lower flanges at its center.
34, 34a are provided, and the lower flange 34a serves as a spring receiver. A return spring 35 is interposed between the spring receiver 34a and the inner bottom 31 of the adjustment chamber 9. Then, an adjusting rod 33 is provided in the opening of the adjusting chamber 9.
Is screwed into a screw cover 36 which slidably penetrates through the screw cover.
The lower portion 36 presses the flange piece 34 above the adjusting rod 33 to adjust the elasticity of the return spring 35, and the adjusting rod 33 is protruded into and out of the adjusting chamber 9.

Reference numeral 37 denotes a pressing operation portion of an adjusting rod 33 provided at an upper portion of the adjustment chamber 9, and the pressing operation portion 37 includes a support fitting 38 and a lever 39 mounted on the support fitting 38.

The support bracket 38 is integrally formed of a material having elasticity such as a spring steel material which does not cause plastic deformation, and has a pair of support plates 41 projecting upward from a latch portion 40 formed of a C-shaped retaining ring.
41a are arranged to face each other so as to have elasticity. Also, support plate 4
1, 41a are formed by bending a strip formed continuously in one radial direction of the hooking part 40 at a right angle, or by inclining outwardly at a predetermined angle without removing the springback, to form the support plates 41, 41a. The upper part may be slightly opened.

The support plates 41, 41a are formed such that the upper ends thereof are bent inwardly in an inclined manner, and the outer surfaces thereof are guided surfaces 42, 42a.
At the same time, shaft holes 43, 43a are formed at appropriate positions of the support plates 41, 41a.

The lever 39 forms a pressing portion 44 of the adjusting rod 33 by bending the distal end of the metal strip plate upward with a gentle curve and bending the distal end substantially vertically. Also, lever 39
Is formed so that the left and right ends of the central portion extend wider than the interval between the support plates 41 and 41a, and hook-shaped pieces 45 and 45a whose tips protrude forward from the extended ends are provided continuously.

The hook-like pieces 45, 45a are formed by bending inwardly a protruding piece continuously formed at the lower part of the tip, and connecting the protruding piece to the hook-like piece 45, 45a.
The support shafts 46, 46a project obliquely upward from the inside, and the outer inclined surfaces of the support shafts 46, 46a form guide surfaces 47, 47a.

The support shafts 46, 46a of the lever 39 are rotatably mounted in the shaft holes 43, 43a of the support fitting 38, while the adjustment chamber 9
A groove 48, which is wider than the thickness of the hooking portion 40, is engraved on the outer periphery of the upper portion of the supporting member 38. The hooking portion 40 of the support fitting 38 is rotatably attached to the adjustment chamber 9 in the groove 48, and the pressing operation portion 37 Is configured.

When the lever 39 is attached to the support bracket 38, the guide surfaces 42 and 42a of the support bracket 38 are attached to the guide surface 4 of the lever 39.
By pushing the guide surfaces 47 and 47a of the lever 39 along the slope while pressing the 7, 47a, and pushing down the lever 39,
The support shafts 46, 46a are easily fitted into the shaft holes 43, 43a.

In this mounting state, the support shafts 46, 46a are inclined upward, so that they do not easily come off the shaft holes 43, 43a, and the support plates 41, 41a inclined outward have hook-like pieces of the lever 39. Since the elasticity acts on the outside of the support plates 41, 41a of the 45, 45a, it is harder to come off.

In the pressing operation section 37, the lever 39 is arranged between the support plates 41, 41a, and the hook-shaped pieces 45, 45a are arranged outside the support plates 41, 41a to connect the support shafts 46, 46a. Support plate 41, 41a
Are mounted on the shaft holes 43 and 43a from the outside, but the present invention is not limited to such a system, and the following configuration may be adopted.

That is, the upper end of the support fitting 38 is formed to be bent outward in an inclined manner, and its inner surface is formed as the guide surfaces 42 and 42a. The support plates 41 and 41a may be inclined slightly inward in the opposite direction to the above, so that the upper portions of the support plates 41 and 41a are slightly closed.

In the lever 39, the width of the central portion where the hook-shaped pieces 45, 45a are provided is made narrower than the distance between the support plates 41, 41a.
The support shafts 46, 46a are projected obliquely upward from the outside of 45a. In the lever 39, it is not necessary to provide the hook-shaped pieces 45, 45a whose distal ends project forward.
The support shafts 46, 46a may be directly provided on the left and right ends of the 39.

The mounting of the lever 39 to the support fitting 38 is the same as described above, and the mounting state is as shown in FIGS. 9 and 10, and the lever including the hook-shaped pieces 45, 45a between the support plates 41, 41a. The rod 39 is arranged, and the support shafts 46, 46a are mounted in the shaft holes 43, 43a from inside the support plates 41, 41a. On the other hand, in the support fitting 38 provided with the support plates 41, 41a inclined inward, elasticity acts on the inside of the support plates 41, 41a, and the support shafts 46, 46a are moved from the shaft holes 43, 43a. It is hard to come off.

Next, the operation of the suction and discharge valve according to the present invention will be described. When the pressure in the primary flow path 5 rises above the secondary flow path 6, the diaphragm 7 is pressed toward the secondary flow path 6 against the elastic force of the adjusting spring 30.

The valve rod 27 moves together with the diaphragm 7, and the tip of the valve rod 27 contacts the lower end of the adjusting rod 33.
The valve stem 27 is pushed back against the elastic force of 29, thereby
When the valve 26 is opened and the fluid flows from the primary flow path 5 to the secondary flow path 6 and the pressure in the primary flow path 5 decreases, the valve element 26 closes.

When the valve body 26 is forcibly opened, the projecting end of the adjusting rod 33 is raised by raising the base end of the lever 39.
With the curved surface at the tip of
The pressing part 44 of the lever 39 is an adjusting rod against the elastic force of the return spring 35.
The protruding end of 33 is pressed downward, whereby the adjusting rod 33 pushes down the valve rod 27 to open the valve element 26.

[0035]

In short, according to the present invention, an adjusting rod 33 which is connected to the valve rod 27 and forcibly opens the valve body 26 is protruded from the top 9 of the main body 1 so as to be freely protruded and retracted. Lever provided
In the suction and discharge valve provided with the top 39 of the main body 1, the top 9
A groove 48 is engraved on the outer periphery, and a locking portion 40 made of a C-shaped retaining ring is rotatably mounted on the top portion 9 in the groove 48, so that a dedicated jig for the C-shaped retaining ring is used. Opening 40 allows easy installation simply by fitting it into groove 48.

Also, a pair of support plates projecting upward from the hooking portion 40 are provided.
The support shafts 41 and 41a are provided so as to have elasticity, and the support shafts 46 and 46a protruding from the lever 39 are rotatably mounted in the shaft holes 43 and 43a penetrating the support plates 41 and 41a. , Support plate 4
The lever 39 can be easily assembled simply by bending the support shafts 46, 46a by the protrusions of the support shafts 46, 46a by their elasticity, and mounting the support shafts 46, 46a in the shaft holes 43, 43a. 41, 41a
The shafts 46, 46a do not come off because of the elastic return.

As described above, according to the present invention, the support plate 41,
The hook 40 (support bracket 38) provided with 41a, the two articles of the lever 39 and the number of parts are small, the assembly of both articles, and the main body 1
Since the number of mounting steps to the top 9 is reduced and the mounting is not performed by the support nut h as in the conventional case, it is not necessary to engrave a male screw on the top 9 and the manufacturing cost can be reduced. Further, the lever 39 can be prevented from coming off due to an external factor such as vibration during use of the main body 1.

At the left and right ends of the lever 39, hook-shaped pieces 45, 45a projecting forward are provided.
a Since the support shafts 46, 46a project diagonally upward inside the tip, the lever 39 is arranged between the support plates 41, 41a, and the hook-shaped pieces 45, 45a are arranged outside the support plates 41, 41a. And spindle 4
6, 46a can be mounted in the shaft holes 43, 43a from outside the support plates 41, 41a.

The upper ends of the support plates 41, 41a are bent inwardly in an inclined manner, and the support plates 41, 41a and the support shafts 46, 46a are formed.
Guide surfaces 42, 42a, 47 and 47a, the guide surfaces 47 and 47a of the lever 39 are pressed against the guide surfaces 42 and 42a of the support plates 41 and 41a, and the guide surfaces 42 and 42a of the lever 39 are pressed along the slope. By simply sliding the guide surfaces 47 and 47a of the rod 39, the support plates 41 and 41a are bent inward against the elastic force thereof. The support shafts 46 and 46a can be fitted and mounted. When the lever 39 is mounted, the support shaft 46,
Since 46a is inclined upward, it is difficult to come off the shaft holes 43 and 43a.

Also, since the support plates 41 and 41a are provided so as to be inclined outward, when the lever 39 is mounted, the hook-shaped piece 4
Since the elasticity acts on the outside of the support plates 41, 41a of the 5, 45a, the lever 39 is harder to come off.

The support shaft 4 is provided obliquely upward on the left and right ends of the lever 39.
Since the protrusions 46 and 46a are provided, the support shafts 46 and 46a can be mounted in the shaft holes 43 and 43a from inside the support plates 41 and 41a by disposing the lever 39 between the support plates 41 and 41a. Support plate 41, 41
The upper end of a is bent outward and inclined, and the supporting plates 41, 41
The inner inclined surface of a and the outer inclined surface of the support shaft are
a, 47, 47a, by pushing down the lever 39 while pushing the guide surfaces 47, 47a of the lever 39 against the guide surfaces 42, 42a of the support plates 41, 41a, the shaft hole 43, The support shafts 46, 46a can be fitted and mounted on the 43a, and the lever 39 can be assembled.

Further, since the support plates 41 and 41a are provided to be inclined inward, the support plates 41 and 41a can be mounted even when the lever 39 is mounted.
Elasticity acts on the inside of 41a, and the support shafts 46, 46a
Its practical effect is extremely large, such as making it difficult to deviate from 43a.

[Brief description of the drawings]

FIG. 1 is a sectional view of a suction / discharge valve main body.

FIG. 2 is a perspective view of a top of a main body.

FIG. 3 is a plan view of a support fitting.

FIG. 4 is a front view of a support fitting.

FIG. 5 is a side view of the support fitting.

FIG. 6 is a plan view of a lever.

FIG. 7 is a front view of a lever.

FIG. 8 is a side view of the lever.

FIG. 9 is a front view showing a modification of the pressing operation unit.

FIG. 10 is a side view showing a modification of the pressing operation unit.

FIG. 11 is an enlarged view showing a fixed state of a valve stem guide.

FIG. 12 is a plan view of a valve stem guide.

FIG. 13 is a sectional view of a conventional suction and discharge valve.

FIG. 14 is a perspective view showing an attached state of a lever.

[Explanation of symbols]

 1 Body 9 Top 26 Valve body 27 Valve rod 33 Adjustment rod 39 Lever 40 Hook 41, 41a Support plate 42, 42a Guide surface 43, 43a Shaft hole 44 Pressing part 45, 45a Hook-shaped piece 46, 46a Support shaft 47 , 47a Guide surface 48 Groove

Claims (5)

(57) [Claims] 1. A suction / discharge system comprising: an adjusting rod connected to a valve stem for forcibly opening a valve body, protrudingly protruding and retracting from the top of the main body, and a lever provided with a pressing portion of the adjusting rod provided on the top of the main body. In the valve, a groove is engraved on the outer periphery of the top portion, and a locking portion formed of a C-shaped retaining ring is rotatably attached to the top portion in the groove portion, and a pair of support plates projecting upward from the locking portion have elasticity. And a support shaft provided on a lever is rotatably mounted in a shaft hole passing through the support plate. 2. A hook-like piece whose tip projects forward at the left and right ends of the lever, and a support shaft projects obliquely upward inside the tip of the hook-like piece. 2. The intake / discharge valve according to claim 1, wherein the portion is bent inwardly in an inclined manner, and the outer inclined surfaces of the support plate and the support shaft are formed as guide surfaces. 3. The intake and exhaust valve according to claim 2, wherein the support plate is provided to be inclined outward. 4. A support shaft protrudes obliquely upward from the left and right ends of the lever, and the upper end of the support plate is bent outward so as to be inclined. The intake and exhaust valve according to claim 1, wherein the surface is an induction surface. 5. The intake and exhaust valve according to claim 4, wherein the support plate is provided to be inclined inward.