JPS6143028Y2 - - Google Patents

Description

[Detailed explanation of the idea]

[Industrial Application Field] The present invention relates to an improvement of a lever handle used in a butterfly valve. [Problems to be solved by conventional techniques and inventions] FIG. 2 shows an example of the top part (corner part connected to the lever handle) of a conventional stem. As shown in the figure, since the diameter of the stem becomes thicker as the valve size increases, the size of the corner inevitably increases, and lever handles having a fitting part with this corner are not common. If we dare to standardize the
As shown in Figure 3, since it is not possible to make the corners in the size range of 50A to 100A the same size, the breaking strength of the corners will be the same value, and the large size will be insufficient in strength, making it impossible to implement. It is. For the above reasons, conventionally it was considered impossible to standardize lever handles and it was not possible to provide compatibility. [Means for solving the problem] The present invention was made to solve this problem, and its gist is that the top of the disk drive stem is made to have a width across flats, and that around the stem is Mounting a bush having an outer diameter that is the same as the circular cross-sectional groove provided at the lower part of the lever handle and an inner diameter that is the same as the stem diameter, the bush fitting into the circular cross-sectional groove of the lever handle, The width across flats of the stem depends on the butterfly valve, characterized in that the lever handle is configured to fit into a rectangular groove provided above the circular cross-sectional groove of the lever handle. [Function] Fig. 4 shows an outline of the present invention, in which the fitting portion of the stem connected to the handle is chamfered on two sides, and the width across the flats is manufactured to the same size for each size. In this case, the strength problem is solved because the breaking strength of the portion increases as the size increases. Next, as shown in FIG. 5, if the fitting part of the lever handle is provided in accordance with the large size 100A, it can be used within the range of sizes 50A to 100A. However, if this condition is applied to size 50A, the wobbling in the direction parallel to the two surfaces will be excessive.
This is especially a fatal flaw in the case of lock lever type butterfly valves. Therefore, the present invention provides a bushing as shown in FIG. 8 to solve the problem of rattling in the parallel direction, and at the same time realizes interchangeability of the handle. In other words, conventionally there were nine types of lever handles for sizes 50A to 300A, but according to the present invention, as is clear from Table 1, only three types are required, which is very convenient for retailers and end users. [Embodiment and effects of the invention] Next, referring to the drawings showing an embodiment of the present invention, to explain in detail, in FIG. It is a lever handle that fits with the 4 is a bush installed between the stem 2 and the lever handle 3 to eliminate the above-mentioned wobbling, and 5 is a nut for fixing the stem 2 and the lever handle 3. Inner diameter di of bush 4 in Fig. 8
corresponds to the outer diameter of the stem top of each size, and the outer diameter dimension do is the same size as the circular cross-sectional groove 6 of the bushing fitting part of the lever handle 3 shown in FIGS. 6 and 7. Furthermore, as shown in FIG. 6, a rectangular groove 8 is provided above the circular cross-sectional groove 6 of the lever handle to fit with the width across flats 7 of the top of the stem, thereby creating a structure for transmitting the rotational driving force of the lever handle to the stem. It's summery. This invention relates to a lever handle used in butterfly valves, and its purpose is to provide the market with a product with a low total cost by ensuring compatibility of the lever handle, and to provide a product with a low total cost to the market. The aim is to facilitate the use of the products by end users and other handlers. As shown in the example in Table 1, the lengths of conventional lever handles are roughly divided into three types, and for example, it appears that a common lever handle can be applied to the size range of 50A to 100A. But in reality
Due to the lack of compatibility in the size range of 50A to 100A, many users feel inconvenienced, and there are strong calls for improvements.

【table】

[Table] Lever handles are often damaged during transportation or use, and when needed in an emergency, they are not interchangeable, which causes a great deal of hardship for field personnel. Therefore, the object of the present invention is to provide a product that eliminates such unreasonableness. Next, based on FIGS. 2 to 5, the top of the stem 2, which was conventionally ``incompatible'', is screwed, and the lever handle is fixed to the stem 2 with a nut 5. According to the lever handle of this invention, several sizes of butterfly valves can be driven by simply using a bushing that has an "inner diameter that matches the outer diameter of the top of the stem" and an "outer diameter that matches the circular cross-sectional groove of the lever handle." However, one type of lever can be commonly used. As described above, the present invention is highly effective in realizing compatibility with lever handles for driving disks of butterfly valves and ball valves, and in reducing total costs including maintenance costs and stock costs.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing an embodiment of the present invention, Fig. 2 is an illustrative diagram of the top of a conventional stem, Fig. 3 is an illustrative diagram of the same as the above, and Fig. 4 is an illustration of the present invention. FIG. 5 is an exemplary view showing the fitting part of the lever handle of the present invention; FIG. 6 is an exemplary view of the lever handle of the present invention; FIG. 7 is an explanatory view of the assembly of the same; FIG. The figure is an exemplary view of a bush used in the present invention. DESCRIPTION OF SYMBOLS 1...Butterfly valve body, 2...Stem for disc drive, 3...Lever handle, 4...Button, 5...Nut, 6...Circular cross-sectional groove of the button fitting part of the lever handle, 7...Stem Width across flats at top, 8... Rectangular groove of lever handle.

Claims (1)

[Scope of utility model registration request] The top of the disk drive stem is made to have a width across flats, and around the stem is attached a bush whose outer diameter is the same as the circular cross-sectional groove provided at the bottom of the lever handle and whose inner diameter is the same as the stem diameter. and a lever handle configured such that the bush fits into the circular cross-sectional groove of the lever handle, and the width across flats of the stem fits into a rectangular groove provided above the circular cross-sectional groove of the lever handle. A butterfly valve is featured.