JP2013122304A - Resin valve allowing attachment and detachment/fixation between valve casing and lid to be easily and reliably performed - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a synthetic resin valve allowing attachment and disassembly between a valve casing and a lid to be easily performed by rotating the lid by 45 degrees or less and allowing the fixation after the mounting to be reliably performed.SOLUTION: In a valve of a two-way, three-way, angle shape, or the like made of synthetic resin such as vinyl chloride, for mounting a lid on a valve casing, cylindrical protrusions are provided at 2-4 places at positions obtained by equally dividing an upper outer peripheral surface of the valve casing into 2-4. Recessed grooves are provided at 2-4 longitudinal places at positions opposed to the protrusions of the valve casing on an inner peripheral surface of the lid covering it. Further, the recessed grooves are extended from middle parts, respectively, in the circumferential direction at 45 degrees or less. The mounting between the valve casing and the lid is performed by aligning the recessed grooves of the lid to the protrusions of the valve casing and by rotating it in a clockwise direction by 45 degrees or less. Alternatively, the disassembly may be performed by rotating the lid in a counterclockwise direction by 45 degrees or less. Further, a hemicylindrical small protrusion is provided at an intermediate position of two adjacent protrusions by the protrusions of the valve casing, and a hemicylindrical small recessed groove is provided between the adjacent two recessed grooves of the lid opposed thereto.

Description

  The present invention relates to a synthetic resin valve that is attached to a small-diameter air pipe such as a septic tank for purifying waste water or a pipe of a water supply / drainage device, and is used for various purposes such as adjustment of the amount of air and water and switching of the flow direction.

  In the above devices, valves used for controlling fluids such as air and water are usually large and inexpensive by injection molding resin materials such as vinyl chloride on main components such as valve boxes, valve bodies and lids. To be produced.

  This type of valve has a relatively small nominal diameter and is manufactured as a general-purpose valve with a light load of fluid conditions such as pressure and temperature. When assembling the valve, an adhesive is used after the final combination of the valve box and lid. The gap between the valve box and the lid is fixed to prevent the lid from coming off or the fluid from leaking during use.

  Therefore, it is handled as a so-called disposable valve that cannot be disassembled, inspected or reassembled after completion.

  As mentioned above, conventional valves require adhesive drying time because of the use of an adhesive in assembly, and care is required for handling. In addition, fluid valve seat leakage during the inspection process and use of the finished product, external When a nonconformity such as leakage or malfunction occurs, it is unreasonable and uneconomical that it cannot be disassembled, inspected (investigation of the cause of nonconformity), or remanufactured by replacing parts, and must be discarded or replaced with a new one. There was a problem. The present invention solves all of these conventional problems.

  The means taken by the present invention to solve the above-mentioned problem is to fit a protrusion provided on the upper outer peripheral surface of the valve box and a concave groove provided on the inner peripheral surface of the lid that covers this, along the groove. When the lid is rotated clockwise by 45 degrees or less, the semi-cylindrical small concave groove of the lid fits into a semi-cylindrical small protrusion provided separately on the outer peripheral surface of the valve box, and the valve box and the lid are fixed. . In addition, when the cover is turned counterclockwise, the fixing is released and the lid is rotated at 45 degrees or less so that it can be easily disassembled.

  According to the present invention, it is possible to easily and reliably assemble, disassemble, and fix the valve case and lid of various synthetic resin valves such as two-way, three-way, and angle types, and at the time of inspection and use after completion of assembly. Disassembling instead of discarding and replacing with a new valve for this nonconformity such as valve seat leakage, external leakage, malfunction, etc. (this requires valve piping adhesion or removal of welding or reworking). Inspection and regeneration are possible, and a reasonable and economical valve can be provided.

Example of conventional angle valve An example of the valve of the present invention Valve box according to the present invention Lid according to the present invention

FIG. 1 shows an embodiment of a conventional angle type valve.
The rubber seat valve seat 4 and the valve body 3 (with the O-ring 5 attached) are attached to the valve box 1a, and an adhesive is applied to the outer peripheral surface (C) of the valve box, and then the lid 2a is fitted and fixed. After the adhesive is dried and fixed, the handle 6 is attached, fixed with the handle nut 7a, and the scale seal 8 is attached to the upper surface of the lid 2a to complete the assembly.

  The function of the valve is described as follows. In FIG. 1, a valve groove is provided on the valve seat surface of the valve body 3 and is seated on the rubber seat valve seat 4. The fluid flows in from the inlet A side of the valve, and the fluid flows out from the outlet B by the counterclockwise rotation of the handle 7a. The flow path area of the valve body 3 is changed by operating the handle 7a, and the fluid flows from 0 to 100%.

  In the conventional valve having such a structure, the mounting of the valve box 1a and the lid 2a is assembled with an adhesive, and when the valve seat leakage, external leakage or malfunction occurs during the inspection process or use, the valve is disassembled and inspected. It is impossible to regenerate the valve by replacing parts, etc., and it must be disposed of and replaced with a new one.

FIG. 2 shows an embodiment of the present invention.
The rubber seat valve seat 4 and the valve body 3 (with the O-ring 5 attached) are attached to the valve box 1b of the present invention, and the lid 2a is fitted and fixed. Thereafter, the handle 6 is attached, fixed with the handle fixture 7b, and the scale seal 8 is attached to the upper surface of the lid 2b to complete the assembly. Parts other than the rubber seat valve seat 4 and the O-ring 5 are injection-molded with a synthetic resin such as vinyl chloride.

  At the time of use after the pipe is attached, the fluid flows from the inlet A of the valve box 1b, and flows out from the outlet B of the valve box 1b by rotating the handle 6 counterclockwise. A flow path groove is formed in the valve seat surface of the valve body 3, and when the indication on the scale seal 8 by the handle 6 is 0 (closed), the fluid is closed, and the handle 6 is turned counterclockwise. When rotating, the flow passage area of the valve body 3 changes and the fluid flows out from the outlet B from 0 to 100%.

In the valve having such a structure, the manner of mounting, fixing, and disassembling the valve box 1b and the lid 2b will be described. FIG. 3 shows a valve box 1b according to the present invention, and FIG. 4 shows a lid 2b according to the present invention.
Cylindrical protrusions 10 and 11 are formed at the position where the upper outer peripheral surface of the valve box 1b is equally divided into two parts, and the diameters of these are different from each other. It prevents assembly. A semi-cylindrical small protrusion 12 is formed at an intermediate position between these protrusions, and the corner of the small protrusion 12 has an R shape only on one side (upper side in the top view).

  Grooves 13 and 14 are provided on the inner peripheral surface of the lid 2b covering the valve box 1b at positions opposite to the protrusions of the valve box, and these are formed upward from the lower end of the lid 2b, respectively, and further along the inner peripheral surface. It is extended in a clockwise direction (viewed from below) with a gentle gradient up to 45 degrees. The widths of the concave grooves 13 and 14 correspond to the diameters of the cylindrical protrusions 10 and 11 of the valve box, and have a difference in size. In addition, a semi-cylindrical small groove 15 is formed in the inner peripheral part between these two grooves.

  In order to attach and fix the lid 2b to the valve box 1b, the concave grooves 13 and 14 on the inner peripheral surface of the lid 2b are aligned with the protrusions 10 and 11 on the upper outer peripheral surface of the valve box 1b and inserted in the clockwise direction. Rotate 45 degrees. Then, the semi-cylindrical small protrusion 12 of the valve box 1b is deformed into an elliptical shape by the lid 2b, the semi-cylindrical small concave groove 15 is fitted into the small protrusion 12, and the lid 2b returns to a circular shape, Fixed. At this time, since the corners of the small protrusions 12 have an R shape, the lid 2b can easily ride. On the contrary, when turning counterclockwise to remove the lid 2b, the lid 2b is difficult to get over the small protrusion 12 because there is no R at the opposite corner of the small protrusion 12. That is, the lid does not easily come off due to vibration or shock of the pipe during use of the valve.

DESCRIPTION OF SYMBOLS 1a: Valve box 1b of the conventional angle type valve 1b: Valve box 2a of the valve of the present invention 2d: Lid of the conventional angle type valve 2b: Lid of the valve of the present invention 3: Valve body 4: Rubber seat valve seat 5: Attached to the valve body O-ring 6: handle 7a: handle nut 7b of a conventional angle valve: handle fixture 8: scale seal 10: upper protrusion 11 on the upper outer peripheral surface of the valve box of the valve of the present invention 11: of the valve of the present invention Upper convex small 12 on the upper outer peripheral surface of the valve box: Semi-cylindrical small convex 13 on the outer peripheral surface of the valve box of the present invention 13: Large groove 14 on the inner peripheral surface of the lid of the present valve: Small groove 15 on the inner peripheral surface of the lid of the valve of the present invention: Semi-cylindrical small groove on the inner peripheral surface of the cover of the present invention valve

Claims (5)

  In order to easily and reliably mount and disassemble the valve box and lid of the valve, two to four cylindrical protrusions are provided at positions where the upper outer peripheral surface of the valve box is equally divided into two to four parts, and this is covered. Two to four concave grooves are provided in the longitudinal direction on the inner peripheral surface of the lid at positions opposite to the protrusions of the valve box, and each groove is extended at 45 degrees or less in the circumferential direction. The valve box and the lid are mounted by aligning the groove of the lid with the convexity of the valve box, fitting the lid, and then rotating it by 45 degrees or less in the clockwise direction. Valve that can be performed by rotating at less than a degree. In addition, the shape of the protrusion provided in the valve box may be an oval or a rectangular cylinder other than the cylinder.   When extending the concave groove of the lid from the vertical direction to the circumferential direction at 45 degrees or less, by giving a gentle slope of one-sided up, the protrusion of the valve box is always kept in the concave groove of the lid when the lid rotates. 2. The valve according to claim 1, wherein the valve is prevented from rattling between the lid and the valve box because it is pressed against the wall surface.   A semi-cylindrical small protrusion is provided between two adjacent concave grooves of the lid opposite to the valve box by providing a semi-cylindrical small protrusion at an intermediate position between two adjacent protrusions. A groove is provided. As a result, when the lid is rotated clockwise by 45 degrees or less, the lid is deformed into an elliptical shape, and the semi-cylindrical small concave groove gets over the semi-cylindrical small protrusion of the valve box, and the two are fitted. Then, the lid returns to the original circular shape, and the valve box and the lid are fixed. When disassembling, when the cover is rotated counterclockwise, the cover deforms into an elliptical shape, the semi-cylindrical small groove gets over the semi-cylindrical small protrusion of the valve box, the cover returns to a circular shape, and the fixation is released. The valve according to claim 1 or 2, wherein the valve is provided.   In the above, only one side of the semi-cylindrical small protrusion of the valve box has an R-surface shape, and the semi-cylindrical small groove is easy to ride on when the lid is mounted, and the semi-cylindrical small groove on disassembly Is difficult to get on. That is, the valve according to claim 1, 2, or 3 that is easy to attach a lid and is difficult to disassemble.   Claims wherein a difference is made in the size of the protrusions at the two to four locations of the valve box, and the size of the corresponding groove in the cover is also changed in the same manner to prevent erroneous assembly of the valve box and the cover. The valve according to 1 or 2 or 3 or 4. It is also possible to prevent erroneous assembly by changing the mounting angles of the 2-4 protrusions of the valve box and the 2-4 recess grooves of the lid.

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