Valve

Abstract

To provide a valve which has both a handle position fixing mechanism and an opening degree display mechanism with a simple configuration.SOLUTION: A valve has: a scale part 8 which is attached to a valve body 10 and displays a scale of an opening degree; and an opening degree indication part 6 which includes an indication line 6c attached on a peripheral face of a handle 2 and displayed along a peripheral direction, and in which the indication line 6c displays an opening degree by indicating the scale of the scale part 8. A screw hole 6b including a female screw part 7b is formed on an inner peripheral face of the opening degree indication part 6. By screwing a male screw member 7b into the screw hole 6b, the male screw member comes into contact with the valve body 10 through a through hole 2b formed on the handle 2.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a valve for connecting and blocking the flow of a fluid, and more particularly to a valve having a mechanism for locking the operation of the valve and a function for displaying the valve opening. [Background technology]

[0002] Conventionally, diaphragm valves have been used as valves for flowing beverages, medicinal liquids, etc. Diaphragm valves are usually used by switching between a fully open and a fully closed state, but manual valves that use a handle as an opening / closing mechanism allow the opening to be adjusted by the position of the handle, allowing a predetermined flow rate to be flowed (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4232921 Summary of the Invention [Problem to be solved by the invention]

[0004] When a diaphragm valve adjusts the opening degree depending on the handle position to allow a predetermined flow rate, it is desirable to provide a mechanism capable of displaying the opening degree and a mechanism for fixing the handle position. It is desirable that these mechanisms be retrofittable to a diaphragm valve that switches between fully open and fully closed states, and that the number of parts be minimized. The locking device for a manually operated fluid controller described in Cited Document 1 comprises a C-shaped handle clamping portion that fits into the base of the handle and a mounting portion that extends downward at a substantially right angle from the base end of the clamping portion and abuts the lower end of the bonnet. One side of the C-shaped split of the handle clamping portion has a female thread, and the other side has a through-hole, allowing the locking device to be fixed at any vertical position with a bolt. When the handle is not being fixed, the bolt is loosened, and when it is needed, the tip of the mounting portion is abutted against a straight portion of the bonnet to prevent the handle from rotating.

[0005] The locking device for the manually operated fluid controller described in Cited Document 1 allows the handle to be fixed in any position, but does not have an opening degree display function that shows the degree of opening, so if an opening degree display is required, it must be prepared separately.

[0006] The present invention has been made in view of the above points, and an object of the present invention is to provide a valve having both a handle position fixing mechanism and an opening degree display mechanism with a simple configuration. [Means for solving the problem]

[0007] The valve according to the present invention, which has been made to solve the above problems, is a valve having a valve body having a fluid passage, a valve element that opens and closes the fluid passage by coming into contact with and separating from a valve seat formed in the valve body, and a stem that operates the valve element by turning a handle that is screwed into the body and connected to an end thereof, and has a scale portion attached to the valve body to indicate the degree of opening, and an opening indicator portion that is attached to the circumferential surface of the handle and has an indicator line that is displayed along the circumferential direction, and indicates the degree of opening by pointing to the scale on the scale portion, and the opening indicator portion has an inner circumferential surface NineA through hole is formed in the handle, and a male screw member is screwed into the threaded hole so that the male screw member abuts against the valve body via a through hole formed in the handle.

[0008] This valve has a male threaded member at the opening indicator. screw hole The opening indicator is fixed to the handle by screwing it into the handle and then abutting and pressing it against the outer surface of the handle via the handle through-hole, and the handle can be fixed, so that opening indication and handle fixation can be achieved with a simple structure.

[0009] The opening indicator is formed with a plurality of through-holes, and is attached with at least one of the through-holes aligned with the position of the through-hole in the handle. By providing additional screw holes at positions that do not match the through-holes, the opening indicator is firmly fixed to the handle. [Effects of the Invention]

[0010] According to the present invention, it is possible to display the valve opening and fix the handle position with a simple structure. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a front view of a valve according to the present invention. [Figure 2] 2 is a side view of the valve including a cross section taken along line XX in FIG. 1. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the following embodiments are essentially preferred examples and are not intended to limit the scope of the present invention, its applications, or its uses.

[0013] <Embodiment 1> An embodiment of the valve according to the present invention Figures 1 and 2Although a diaphragm valve is shown as an example of the valve in this embodiment, the valve is not limited to this and can also be applied to, for example, a manual needle valve.

[0014] The valve 1 according to the present invention is a valve 1 having a valve body 10 with a fluid passage, a valve element that opens and closes the fluid passage by coming into contact with and separating from a valve seat formed in the valve body 10, and a stem 3 that operates the valve element by turning a handle that is threaded into the body and connected to its end, and is provided with a scale 8 attached to the valve body 10 and displays a scale of the opening degree, and an opening indicator 6 that is attached to the circumferential surface of the handle 2 and has an indicator line 6c that is displayed along the circumferential direction, and indicates the opening degree by the indicator line 6c pointing to the scale on the scale 8. The opening indicator 6 has an inner circumferential surface Screw hole 6a forming a male threaded member 7a The screw hole 6a The male screw member is screwed into the through hole formed in the handle 2. 2c 1. The valve body 10 is brought into contact with the valve body 10 via the

[0015] The valve of the present invention is not particularly limited, and may be any valve that can be opened and closed by manually rotating a handle. For example, in a diaphragm valve, the valve element is a diaphragm, and a diaphragm holder connected to a stem 3 moves axially as the handle 2 is rotated, deforming the diaphragm and opening and closing the fluid passage.

[0016] [Scale] The scale unit 8 is composed of a base portion 80 fixed to the valve body 10 and a scale display portion 81 extending in the axial direction from the base portion 80. In FIG. 1, the base portion 80 is fixed to the top surface of the valve body 10 with bolts B, but this is not limiting and it may be fixed to the side surface or bonnet portion, or may be fixed by adhesive or fitting. The scale display portion 81 of the scale unit 8 may be designed to directly display a scale indicating a plane perpendicular to the axial direction of the stem 3, but in this embodiment, Stem 3A scale plate 82 is used, which has a long hole formed in it so that it can be adjusted in the axial direction and is screwed to the scale display part 81. The scale has an upper scale that indicates the fully open position of the valve 1, a lower scale that indicates the fully closed position, and an intermediate scale between them that indicates the intermediate open position. The scale can be seen from the front of the valve 1, but depending on the application, it may also be visible from the side or back.

[0017] [Opening degree indicator] The opening indicator 6 is a cylindrical member that extends from the grip portion 2a of the handle 2 toward the valve body and is attached to the circumferential surface of the skirt portion 2b that covers the bonnet portion 10b of the valve body 10. The opening indicator 6 is provided with an indicator line 6c along the entire circumferential direction, which indicates the opening of the valve 1 by matching with the scale of the scale portion 8 described above. The opening can be determined by checking the scale with which the indicator line 6c matches. At least one threaded hole 6a is formed in the opening indicator 6, and this threaded hole 6a is aligned with a through-hole 2c formed in the skirt portion 2b. A long male-threaded member 7a is then threaded into the threaded hole 6a, and its tip reaches the through-hole 2c, thereby fixing the opening indicator 6 to the handle 2. Further threading of the male-threaded member 7a allows it to abut against the bonnet portion 10b of the valve body 10 via the through-hole 2c. The opening indicator 6 also has a threaded hole 6b that does not match with the through-hole 2c formed in the skirt portion 2b. of The tip of a short male screw member 7b that screws into this screw hole 6b abuts against the surface of the skirt portion 2b, thereby firmly fixing the opening degree indicating portion 6 to the handle 2.

[0018] The operation of the valve 1 according to the present invention, configured as described above, will now be described. Typically, the valve 1 installed between the piping of a facility is manually fully opened to allow the required fluid to flow from upstream to downstream within the flow path. At this time, the scale above the scale 8 and the indicator line 6c on the opening indicator 6 coincide, indicating that the valve is fully open. At this time, the male screw member 7a, which is threaded into the threaded hole 6a of the opening indicator 6, can be further screwed in until the male screw member 7a abuts against the outer surface of the valve body 10, thereby fixing the handle 2.

[0019] Next, to block the flow of fluid, first, the male threaded member 7a that abuts against the outer surface of the valve body 10 is slightly loosened to release the handle. Then, the handle 2 is tightened until the lower scale of the scale portion 8 is aligned with the indicator line 6c of the position indicator 6, and the valve 1 is in the fully closed position. After this, just as when fully open, the male threaded member 7a that is threaded into the threaded hole 6a of the position indicator 6 is further screwed in until the tip of the male threaded member 7a abuts against the outer surface of the valve body 10, thereby locking the handle 2 and preventing the valve 1 from opening unintentionally.

[0020] To allow fluid to flow in the partially open state, first, the male threaded member 7a abutting the outer surface of the valve body 10 is slightly loosened to release the handle. Then, the handle 2 is rotated to the desired opening, and the male threaded member 7a, which is threaded into the threaded hole 6a of the position indicator 6, is further screwed in, just as in the fully open and fully closed states, until the tip of the male threaded member 7a abuts the outer surface of the valve body 10, thereby fixing the handle 1. The desired opening may be determined by aligning the middle scale of the scale 8 with the indicator line of the position indicator, or it may be determined by the number of rotations of the handle 2. In either case, in the partially open state, the indicator line 6c of the position indicator 6 is between the upper and lower scales, and can be visually confirmed. [Industrial Applicability]

[0021] The valve of the present invention can display the valve opening and fix the handle position with a simple structure, and therefore can be suitably used as a manual valve that requires both functions. [Explanation of symbols]

[0022] 1 valve 10 Valve body 10b Bonnet 2 handles 2a Grip part 2b Skirt part 2c through hole 3 Stem 6 Opening degree indicator 6a screw hole 6b screw hole 6c indicator line 7a Male thread member 7b Male thread member 8 Scale

Claims

1. a valve body having a fluid passage; a valve body that opens and closes the fluid passage by coming into contact with and separating from a valve seat formed in the body; a stem that operates the valve body by rotating a handle that is screwed into the body and connected to an end of the stem, a scale attached to the valve body to indicate the valve opening; an opening degree indicator that is attached to the circumferential surface of the handle and has an indicator line that is displayed along the circumferential direction, and that indicates the opening degree by pointing the indicator line to the scale; A threaded hole with a female thread portion on its inner circumferential surface is formed in the opening degree indicating portion, and a male screw member is threaded into the threaded hole so that the male screw member abuts against the valve body via a through hole formed in the handle.

2. 2. The valve according to claim 1, wherein the opening degree indicator has a plurality of threaded holes formed therethrough, and at least one of the threaded holes is attached to the handle so as to coincide with the position of the through hole.

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