JP2606355Y2 - Opening display mechanism for valve reducer - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for indicating the opening of a valve speed reducer.

[0002]

2. Description of the Related Art As shown in FIGS. 3 and 4, in a conventional valve speed reducer, a driving force applied to an input sun gear 2 via a cap 1 is fixed to a first planetary gear 3 and a case 4 by an interface. The reduction gear ratio is transmitted to the output shaft carrier 8 via the null gear 5, the sun gear 6, and the second planetary gear 7, and the operation rod of the valve that fits in the shaft hole of the output shaft carrier 8 is formed in the gear train. It is rotating with.

[0003] A memory carrier 9 which is rotatably fitted to the input shaft 2a of the input sun gear 2 is provided on the sun gear 6
The opening pointer 10 is fixed to the memory carrier 9 and the cover 11 formed with the opening scale is fixed to the case 4 so as to rotate integrally with the memory carrier 9. The opening degree of the valve is indicated by indicating the opening scale 12 of the cover 11 by the opening degree pointer 10 that rotates integrally.

[0004]

However, in the above-described conventional configuration, the number of rotations of the memory carrier 9 located on the upper side of the gear train forming the power transmission system and the output shaft carrier 8 located on the lower side are different, and the output power is different. The rotation angle of the opening pointer 10 is 90 ° with respect to the rotation angle 90 ° required for the shaft carrier 8.
There was a problem of becoming larger than °. In particular, if the reduction ratio is increased by increasing the number of deceleration stages, the rotation angle of the opening pointer 10 becomes 360 ° or more, and there is a problem that it does not serve as an opening instruction.

[0005] The present invention solves the above-mentioned problems.
Provided is an opening degree display mechanism for a valve reducer that allows the rotation angle of the opening degree pointer to correspond to the actual rotation angle of the valve body regardless of the reduction ratio formed by a gear train between the input shaft and the output shaft. The purpose is to do.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an opening degree display mechanism for a valve speed reducer according to the present invention includes a main power transmission system having an appropriate reduction ratio between an input shaft and an output shaft. In the interposed valve speed reducer, an opening scale is provided on a cover fixed to the case that does not rotate, and an opening pointer carrier is rotatably fitted to the input shaft so that the opening pointer carrier is freely rotatable. the opening guideline for instructing provided, which is interposed a driven force transmission system between the input shaft and the opening guide carrier, constitutes a reduction ratio in the driven force transmission system to the same reduction ratio in the main power transmission system And the main power transmission system
Is the first internal gear provided on the inner peripheral surface of the case and
And the second internal gear and the input shaft support fixed to the input shaft.
Gear that is concentric with the axis of the input shaft sun gear.
Gear, the input shaft sun gear and the first internal gear.
And the sun gear is rotatably provided via the first gear shaft.
A first planetary gear and a rotatable arrangement in the case,
An output shaft carrier fitted to the output shaft; a sun gear;
Mesh with the internal gear, and the second gear shaft on the output shaft carrier.
Multi-stage with a second planetary gear rotatably provided via
To the first floor, and the sub power transmission system includes an input shaft sun gear and a first
Planetary gear, first internal gear, and first gear
First opening connected to one end of the shaft and rotatably provided on the input shaft
Gear and an opening gear provided on the cover meshing with the first opening gear.
A second opening gear rotatably supported by a gear shaft and an opening gear shaft
To rotate freely, and rotate integrally with the second opening gear to open.
With the third opening gear meshing with the degree pointer carrier
It is configured to speed up .

[0007]

According to the above construction, the rotation of the input shaft causes the opening pointer carrier to rotate around the axis of the input shaft with the reduction ratio of the slave power transmission system. The opening degree is indicated on the opening scale provided in the above. At this time, the rotation of the input shaft causes the rotation angle given to the output shaft via the main power transmission system to be the same as the rotation angle given to the opening pointer carrier via the sub power transmission system.
The rotation angle of the opening pointer by the rotation of the opening pointer carrier and the rotation angle given to the valve body of the valve by the rotation of the output shaft become the same as the actual value.

Accordingly, the opening degree indicator indirectly indicates the opening degree of the valve body by instructing the notation of the opening degree scale, and directly indicates the opening degree of the valve body by the rotation angle of the opening degree indicator itself. Since it is displayed, the opening degree of the valve body is displayed in two ways. Therefore, the operator can recognize the opening degree of the valve body numerically or proportionally by the notation of the opening degree scale, and can directly recognize the rotation position of the valve body by the rotation position of the opening degree pointer. In addition, the above-described recognition can be performed more easily by rotating the opening degree pointer around the axis of the input shaft.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1 and 2, a case 22 of a valve speed reducer 21 (symbol indicates the entire apparatus) is fixed to a valve box (not shown) of a valve. At the same time, the cover 24 is fixed on the internal gear 23 with fixing bolts 25. The internal gear 23 has a first internal gear 23a and a second internal gear 23b on an inner peripheral surface. The cover 24 is an input shaft 26 a of the input shaft sun gear 26.
The opening pointer carrier 27 which is fitted to the outside is rotatably supported, and the opening pointer carrier 27 rotatably supports the input shaft 26a. A cap 28 is fixed to the input shaft 26a with a shear pin 28a. This cap 28
Has a head 28b that engages with an operation handle (not shown).

A sun gear 2 is provided below the input shaft sun gear 26.
9 is rotatably disposed concentrically with the axis of the input shaft sun gear 26, and the sun gear 29 rotatably supports the first planetary gear 30 by the first gear shaft 31. The first planetary gear 30 is connected to the input shaft sun gear 26.
And one end of the first gear shaft 31 is connected to a first opening gear 32 rotatably fitted to the input shaft 26a.

An output shaft carrier 33 is rotatably disposed in the case 22. The output shaft carrier 33 has a shaft hole 33a that fits into a valve stem of a valve that forms an output shaft. The output shaft carrier 33 rotatably supports a second planetary gear 34 by a second gear shaft 35. The second planetary gear 34 meshes with the sun gear 29,
It is in mesh with the second internal gear 23b.

Accordingly, the input shaft sun gear 26, the first planetary gear 30, the first internal gear 23a and the second
The gear train including the internal gear 23b, the sun gear 29, the second planetary gear 34, and the output shaft carrier 33 has an appropriate reduction ratio R, and a main power transmission system is provided between the input shaft 26a and the output shaft (valve rod). Has formed.

On the other hand, as shown in FIG. 2, an opening scale 36 is shown on the upper surface of the cover 24.
Is fixed to the opening pointer carrier 27 and disposed above the cover 24.

The first opening gear 32 meshes with a second opening gear 39 rotatably supported by an opening gear shaft 38 provided on the cover 24, and the second opening gear 39 is rotated by the opening gear shaft 38. It rotates integrally with the third opening gear 40 rotatably supported. The third opening gear 40 meshes with the opening indicator carrier 27.

Therefore, the input shaft sun gear 26, the first planetary gear 30, the first opening gear 32, and the second opening gear 3
The gear train composed of the gear 9, the third opening gear 40, and the opening pointer carrier 27 forms an appropriate reduction ratio R ₀ , and forms a power transmission system between the input shaft 26 a and the opening pointer carrier 27. .

By the way, the input shaft 2 in the above-described speed reducer
6a and the rotation angle α of the output shaft carrier 33 (output shaft), there is a relationship of θ = α / R, and the rotation angle θ of the input shaft 26a and the rotation angle of the opening pointer carrier 27 There is a relationship θ = β / R ₀ between β. Therefore, between the main power transmission system and the sub power transmission system, α = β · R /
There is a relationship R ₀ , and the output shaft carrier 33 (output shaft)
Is the same angle, that is, α = β = 90 °, then R ₀ =
R may be set.

Therefore, the reduction ratio between the gears is set such that the reduction ratio R of the main power transmission system and the reduction ratio R ₀ of the sub power transmission system are the same. Hereinafter, the operation of the above configuration will be described. To open and close the valve, the cap 28 is rotated by an operation handle (not shown), and the input shaft 26 is opened.
The input shaft sun gear 26 is rotated together with a. The rotational force applied to the input shaft sun gear 26 is transmitted to the output shaft carrier 33 (output shaft) via the main power transmission system, and a predetermined reduction ratio R
As a result, the output shaft rotates and the valve body of the valve opens to a predetermined opening degree.

On the other hand, the rotational force applied to the input shaft sun gear 26 is transmitted to the opening indicator carrier 27 via the auxiliary power transmission system, and the opening indicator carrier 27 rotates at a predetermined reduction ratio _R0. An opening indicator 37 provided on the carrier 27 indicates an opening on an opening scale 36 provided on the cover 24.

At this time, since the reduction ratio R of the main power transmission system and the reduction ratio R ₀ of the sub power transmission system are the same, the input shaft 26
By the rotation of a, the rotation angle α given to the output shaft via the main power transmission system becomes equal to the rotation angle β given to the opening hand carrier 27 via the sub power transmission system. The rotation angle of the opening pointer 37 due to the rotation and the rotation angle given to the valve body of the valve by the rotation of the output shaft become the same as the actual value.

For this reason, the opening degree indicator 37 indicates the opening scale 3
6, the opening degree of the valve body is indirectly displayed by instructing the notation of 6, and the opening degree of the valve body is directly displayed by the rotation angle of the opening degree indicator 37 itself. It will be displayed in two ways. Therefore, the operator can recognize the opening degree of the valve element numerically or proportionally by the notation of the opening degree scale 36, and can directly recognize the rotation position of the valve element by the rotation position of the opening degree pointer 37. . Moreover, since the opening degree pointer 37 rotates around the axis of the input shaft 26a, the above-described recognition becomes easier.

[0021]

As described above, according to the present invention, the opening pointer indirectly indicates the opening of the valve body by instructing the notation of the opening scale, and the rotation angle of the opening pointer itself. Since the opening of the valve body is directly displayed, the opening degree of the valve body is displayed in two ways, and the operator can indirectly and directly recognize the opening degree of the valve body. Can be. Moreover, since the opening degree pointer rotates around the axis of the input shaft, the above-described recognition becomes easier.

[Brief description of the drawings]

FIG. 1 is a sectional view of a valve speed reducer according to an embodiment of the present invention.

FIG. 2 is a plan view of the valve speed reducer in the embodiment.

FIG. 3 is a sectional view of a conventional valve speed reducer.

FIG. 4 is a plan view of a conventional valve speed reducer.

[Explanation of symbols]

 24 Cover 26a Input shaft 26 Input shaft sun gear 27 Opening indicator carrier 32 First opening gear 39 Second opening gear 40 Third opening gear

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F16K 37/00 F16K 31/53

Claims (1)

(57) [Scope of request for utility model registration] 1. A valve speed reducer having a main power transmission system having an appropriate speed reduction ratio between an input shaft and an output shaft, wherein a cover fixed to a non-rotating case side is provided with an opening scale and an input scale is provided. The opening pointer carrier is rotatably fitted on the shaft, the opening pointer indicating the opening scale is provided on the opening pointer carrier, and a power transmission system is interposed between the input shaft and the opening pointer carrier. However, the speed reduction ratio of the slave power transmission system is configured to be the same as the speed reduction ratio of the main power transmission system.
Therefore, the main power transmission system is connected to the first interface provided on the inner peripheral surface of the case.
Fixed to the input shaft with the null gear and the second internal gear
Input shaft sun gear and concentric with the shaft center of the input shaft sun gear
Sun gear, input shaft sun gear and first interface
Meshes with the null gear and rotates with the sun gear via the first gear shaft
The first planetary gear freely provided and the rotating
Output shaft carrier that fits into the output shaft
The output shaft carrier meshes with the gear and the second internal gear.
Second planetary rotatably provided on a second gear shaft via a second gear shaft
The gears reduce the gears in multiple stages, and the auxiliary power transmission system includes an input shaft sun gear and a first planetary gear.
Gear, the first internal gear, and one end of the first gear shaft.
A first opening gear rotatably provided on the input shaft;
It engages with the opening gear and rotates automatically with the opening gear shaft provided on the cover.
The second opening gear that is supported at the moment and the opening gear shaft make it rotatable
It is supported and rotates together with the second opening gear to move the opening
An opening indicating mechanism for a valve reducer, wherein the opening is reduced in multiple stages by a third opening gear that meshes with the opening .