JPH1047496A - Valve system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To align a valve element in its vertical center with the center of a valve casing with great ease and quickness in an easier attitude and adjusting the valve element even when the valve casing is embedded in the ground with ease. SOLUTION: A valve system comprises a valve element 5 which turns inside a cylindrical passage 1A to open or close it on valve stems 2A and 2B rotatable on the axis center (a) which is perpendicular to the axis (b) of a valve casing 1 having the cylindrical passage 1A and passes the center of its streamline. A screw 28 is engaged into a tapped hole 27 formed at the upper end of the valve stem 2A along the axis with permitted further tightening or unscrewing to vertically align the valve element 5 through the valve stem 2A, and is supported by a cylindrical part 1a of the valve casing 1 corresponding to the upper end of the valve stem 2A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve device applied to, for example, a butterfly valve or a ball valve. The present invention relates to a valve device having a function for positioning in a direction.

[0002]

2. Description of the Related Art FIGS. 3 and 4 are a semi-longitudinal front view and a longitudinal side view of a general butterfly valve of this type of valve device. In each of these figures, a cylindrical flow passage in a valve box 1 is shown. The valve stems 2A and 2B, which are divided into upper and lower portions, respectively, are arranged vertically at a substantially central portion in the axial direction of the axial line 1A and opposed to each other in the radial direction.
A pivot 4 is rotatably supported around an axis a passing through the center of the upper shaft 2a. A coupling 4 which can be coupled to a rotation operating mechanism (not shown) via a key 3 is connected to the upper end of the upper valve stem 2A. Have been.

[0003] A circular valve element 5 disposed in the flow path 1A.
Are fixedly connected to the valve stems 2A and 2B via connecting pins 6 and 6, respectively.
The valve element 5 rotates in the flow path 1A with the rotation of A and 2B to open and close the flow path 1A.

In the butterfly valve having the above structure, the valve stems 2A, 2B are not only provided with the weights of the valve stems 2A, 2B and the valve body 5, but also depending on the shape of the valve body 5.
The thrust load is exerted by the pressure acting on the valve body 1. Therefore, it is necessary to adjust the position so that the vertical center of the valve body 5 matches the vertical center of the valve box 1 (the axis b of the flow path 1A). Becomes

FIG. 5 shows a specific configuration conventionally used as a position adjusting mechanism 7 in the above-mentioned rose fry valve. A lower bearing 8 provided at a lower end of the valve box 1 has a lower valve stem 2B. A thrust receiving member 10 positioned by the set bolt 9 is provided in correspondence with the above, and a position adjusting member 11 such as a spacer is interposed between the thrust receiving member 10 and the lower end of the lower valve stem 2B. Let me. By changing the thickness of the position adjusting member 11 or selecting the number of stacked members and displacing the lower valve stem 2B in the vertical direction, the vertical center of the valve body 5 is centered in the vertical direction of the valve box 1. The position is adjusted so as to conform to (the axis b of the flow path 1A). In FIG. 5,
A bolt 13 closes an opening at the lower end of the lower bearing 8.
The bottom cover is fixed to the valve box 1 through the bottom cover.

[0006]

In the conventional valve device having the above-described structure, the center of the valve body 5 in the vertical direction coincides with the center of the valve box 1 in the vertical direction (the axis b of the flow path 1A). Is provided at the lower end side of the lower valve stem 2B, so that the operator must not fall into the lower part of the valve box 1 at the time of assembling the valve device, performing a water pressure test, or performing adjustment after installation of the device. In addition, the adjustment work requires considerable time and labor. Also, depending on the place where the valve device is used, the valve box 1 may be used.
May be buried underground, and in this case, there is a problem that adjustment work after installation of the device is impossible or extremely difficult.

[0007] The present invention has been made in view of the above circumstances, and the vertical position of the valve body with respect to the valve box can be easily adjusted in a comfortable posture, and the valve box is placed underground. It is an object of the present invention to provide a valve device that can easily perform a predetermined position adjustment even when the valve device is buried.

[0008]

In order to achieve the above object, a valve device according to the present invention comprises a valve box having a cylindrical flow path, and a valve box which is perpendicular to the axis of the flow path of the valve box. And, a valve stem held in the valve box in a rotatable state around an axis passing through the center of the streamline, and the passage is rotated by rotating the valve stem in the flow passage to rotate the flow passage. In a valve device having a valve element that opens and closes, a screw for adjusting the vertical position of the valve element via the valve rod is provided in a screw hole formed along the axis at the upper end of the valve rod. It is screwed so as to be able to advance and retreat, and this screw is supported on the valve box side corresponding to the upper end of the valve stem. The valve body can be displaced up and down with respect to the valve box through the valve rod only by moving the Therefore, there is no need for the operator to sink into the lower part of the valve box, and the vertical position of the valve body with respect to the valve box can be easily and quickly adjusted only by moving the screw forward and backward while maintaining a comfortable posture. be able to. Further, not only after the installation of the device, but also the position can be easily adjusted under the condition that the valve box is buried underground.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a semi-longitudinal front view of a butterfly valve to which a valve device according to the present invention is applied, and the basic overall configuration of this butterfly valve is as shown in FIGS. 3 and 4. Description is omitted. In FIG. 1, the same reference numerals are given to the same or corresponding components as those shown in FIGS. 3 to 5, and detailed description thereof will be omitted.

In FIG. 1, a bearing 21 of an upper valve stem 2A is shown.
A rotation operation mechanism 23 is installed above the camera via a stand 22. The rotation operation mechanism 23 includes an operation handle 24 and a reduction gear mechanism 25 that reduces the rotation of the operation handle 24 and transmits the reduced rotation to the upper end extension 2a of the upper valve stem 2A. The cylindrical portion 1a surrounding the outer periphery of the upper end extension 2a is formed as a part of the valve box 1. A position adjusting mechanism 26 for adjusting the vertical position of the valve body 5 is provided between the cylindrical portion 1a and the upper end extension 2a of the upper valve stem 2A.

As shown in FIG. 2, the position adjusting mechanism 26 has a screw hole 27 formed along the axis a at the upper end of the upper end extension 2a of the upper valve stem 2A. The valve body 5 is inserted into the hole 27 through the upper valve stem 2A.
A screw 28 for adjusting the position in the vertical direction is screwed so as to be able to move up and down, and this screw 28 is a part of the valve box 1 via a flange 28a fixed to the upper end thereof. It is configured to be engaged and supported by the portion 1a. In FIG. 2, reference numeral 29 denotes a lot bolt for locking the screw 28 after the position of the valve body 5 in the vertical direction is adjusted.

In the butterfly valve configured as described above, the screw 28 provided on the rotary operation mechanism 23 side is moved forward and backward with respect to the screw hole 27, and the screwing amount is changed, so that the upper part is formed. Displacing the valve element 5 in the vertical direction with respect to the valve box 1 via the valve rod 2A so that the vertical center of the valve element 5 coincides with the vertical center of the valve box 1 (the axis b of the flow path 1A). It is not necessary for the operator to go under the valve box 1 at the time of valve assembly, water pressure test, or position adjustment after installation, and it is possible to easily perform predetermined adjustment work while maintaining a comfortable posture. Can be done quickly. Further, even under the condition that the valve box 1 is buried in the ground, the position can be arbitrarily and easily adjusted after the installation, so that an emergency can be promptly dealt with.

In the above-described embodiment, the description has been given of the case where the present invention is applied to a butterfly valve. However, when the present invention is applied to a ball valve, the same effects as described above can be obtained.

[0014]

As described above, according to the present invention, it is very simple and easy to change the screwing amount by moving the screw into and out of the screw hole formed in the upper end of the valve stem. The valve body can be displaced up and down with respect to the valve box through the valve stem simply by performing operation in a proper posture, and therefore, it is necessary for the operator to dive into the lower part of the valve box when assembling or installing the valve device. Therefore, the vertical position adjustment of the valve body with respect to the valve box can be performed very easily and quickly. In addition, it is possible to easily and quickly perform the position adjustment under the condition that the valve box is buried in the ground, as well as after the installation of the device.

[Brief description of the drawings]

FIG. 1 is a semi-longitudinal front view of a butterfly valve to which a valve device according to the present invention is applied.

FIG. 2 is an enlarged vertical sectional front view of a valve body position adjusting mechanism in the butterfly valve;

FIG. 3 is a semi-longitudinal front view showing the general configuration of a general butterfly valve.

FIG. 4 is a semi-longitudinal side view showing an overall configuration of the butterfly valve.

FIG. 5 is an enlarged vertical sectional front view of a valve body position adjusting mechanism in a conventional butterfly valve.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Valve box 1A Flow path 2A, 2B Valve stem 5 Valve body 27 Screw hole 28 Screw a Rotation axis b Flow path axis

Claims (1)

[Claims] 1. A valve box having a cylindrical flow path, wherein the valve box is rotatable about an axis perpendicular to the axis of the flow path of the valve box and passing through the center of the stream line. A valve device comprising: a valve stem held by the valve box; and a valve element that rotates in the flow passage with the rotation of the valve stem to open and close the flow passage. A screw for adjusting the position of the valve element in the vertical direction is screwed into the screw hole formed along with the valve rod so as to advance and retreat, and this screw corresponds to the upper end of the valve rod. A valve device, which is supported on the side of a valve box.