STRUCTURAL IMPROVEMENT OF PISTON SET FOR USE IN HYDRANT

Abstract

A structural improvement of piston set for use in hydrant is provided; a hydrant main body having a valve chamber for receiving a water control valve is mainly provided, the water control valve is composed of a valve member, rubber pads, a piston cylinder and a piston rod disposed inside the valve member, a valve rod, a cover, a valve cap, and a rotary button; the outer side of the piston cylinder is formed with different outer diameters, and preset portions thereof are formed with a water inlet and a water outlet holes, thus the piston rod can be adjusted to alter the relative relation, thereby achieving functions of starting/terminating water supply and adjusting water mixing ratio; and characterized in that: the piston cylinder is formed through a stainless steel base pipe and a plastic sleeve member enclosing the exterior thereof; accordingly, better industrial application valves are provided.

Claims

1. A structural improvement of piston set for use in hydrant, the hydrant mainly including a hydrant main body, two side of the hydrant main body being respectively formed with a water inlet pipe end for being connected to a water supplying pipeline, the front end thereof being extended with a water outlet pipe end for being connected to a water dispensing pipeline, preset locations defined at the two water inlet pipe ends being respectively disposed with a water control bolt for adjusting the water inlet amount, the center of the hydrant main body being upwardly extended with a valve chamber for receiving a water control valve, the water control valve being composed of a valve member, rubber pads at two sides of the valve member, a piston set disposed inside the valve member, a valve rod for operating the piston set, a cover, a valve cap, and a rotary button for locking and operating the valve rod, wherein the piston set being composed of a piston rod and a piston cylinder, the outer side of the piston cylinder being designed to be formed with different outer diameters, and preset portions thereof being formed with a water inlet and a water outlet holes, so that the valve rod being able to be operated for regulating and controlling the piston rod disposed in the interior so as to alter the relative relation, thereby achieving functions of starting/terminating water supply and adjusting the water mixing ratio; and characterized in that: the piston cylinder being formed through a stainless steel base pipe and a plastic sleeve member covering the exterior thereof, the stainless steel base pipe being formed through directly cutting a stainless steel pipe, and preset portions thereof being formed with a water inlet and a water outlet holes, after the stainless steel base pipe being disposed in a preset mold, the plastic sleeve member is formed through being injected into the mold having preset cavities, thereby enabling the plastic sleeve member to integrally enclose at the exterior of the stainless steel base pipe, and the plastic sleeve member being respectively formed with a hole slot corresponding to the water inlet and the water outlet holes of the stainless steel base pipe, thereby forming the piston cylinder having composite materials.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0008] FIG. 1 is a schematic view showing the structure according to one preferred embodiment of the present invention;

[0009] FIG. 2 is an exploded view showing the structure of the water control valve according to one preferred embodiment of the present invention;

[0010] FIG. 3 is a schematic view showing the structure of the piston cylinder according to one preferred embodiment of the present invention;

[0011] FIG. 4 is an exploded view showing the structure of the piston cylinder according to one preferred embodiment of the present invention; and

[0012] FIG. 5 is a schematic view showing the structural relation of the piston cylinder according to one preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0013] One preferred embodiment of the present invention will be described with reference to the drawings for illustrating the structural assembly, the technical means and the functions to be achieved by the present invention.

[0014] Referring from FIG. 1 to FIG. 5, according to one preferred embodiment of the present invention, a hydrant provided by the present invention mainly includes a hydrant main body (10), two sides of the hydrant main body (10) are respectively formed with a water inlet pipe end (11, 12) for being connected to a water supplying pipeline (not shown in figures), the front end thereof is extended with a water outlet pipe end (13) for being connected to a water dispensing pipeline (not shown in figures), preset locations defined at the two water inlet pipe ends (11, 12) are respectively disposed with a water control bolt (111, 121) for adjusting the water inlet amount, the center of the hydrant main body (10) is upwardly extended with a valve chamber (not shown in figures) for receiving a water control valve (20), the water control valve (20) is composed of a valve member (21), rubber pads (22) at two sides of the valve member (21), a piston set (30) disposed inside the valve member (21), a valve rod (23) for operating the piston set (30), a cover (24), a valve cap (25), and a rotary button (26) for locking and operating the valve rod (23), wherein the piston set (30) is composed of a piston rod (31) and a piston cylinder (32), the outer side of the piston cylinder (32) is designed to be formed with different outer diameters and formed through a stainless steel base pipe (33) and a plastic sleeve member (34) covering the exterior thereof, the stainless steel base pipe (33) is formed through directly cutting a stainless steel pipe, and preset portions thereof are formed with a water inlet and a water outlet holes (35, 36), then the stainless steel base pipe (33) is disposed in a preset mold (not show in figures), a plastic material is adopted for being injected so as to enclose the stainless steel base pipe (33), with a cavity design inside the mold, the plastic sleeve member (34) having a preformed status with various diameters is formed, and the plastic sleeve member (34) is respectively formed with a hole slot (37, 38) corresponding to the water inlet and the water outlet holes (35, 36) of the stainless steel base pipe (33), so that the stainless steel base pipe (33) can be integrally enclosed in the interior of the plastic sleeve member (34) for forming the piston cylinder (32) having composite materials; accordingly, under the principle of not affecting the structural status and the functions to be achieved, the original structural strength can be remained, meanwhile an excellent sealing effect can be formed between the rubber pads (22) at the two sides of the valve member (21) and the piston cylinder (32), and the outer circumference of the plastic sleeve member (34) of the piston cylinder (32) is formed with a plurality of annular slots (341) for allowing O-rings (39) to be mounted, so when the piston cylinder (32) is disposed inside the valve member (21), a watertight relation can be established, and the water inlet and the water outlet holes thereof and the water inlet and the water outlet holes of the valve member (21) are spaced from each other for forming independent water passageways, so that the valve rod (23) can be operated for regulating and controlling the piston rod (31) disposed in the interior so as to alter the relative relation with the piston cylinder (32), thereby achieving functions of starting/terminating water supply and adjusting the water mixing ratio.

[0015] Accordingly, without altering the whole assembling components and the functional frame of the hydrant, the present invention enables the piston cylinder of the piston set to be formed through the stainless steel base pipe being enclosed by injecting the plastic sleeve member so as to be provided with a structural design with composite materials, and without affecting the whole assembling relation and the functions to be achieved, the processing procedure of the piston cylinder can be simplified, so that the cost of the stainless steel can be saved while the structural strength being remained, and because the exterior of the piston cylinder is provided with the plastic material, an excellent sealing effect can be formed with the rubber pads at the two sides of the valve member; as such, the present invention is provided with better economic benefits and more practical in industrial use, and disadvantages existed in the conventional structure of the piston cylinder being formed through directly turning a stainless steel bar can be solved.

[0016] Based on what has been disclosed above, with the structural improvement of piston set for use in hydrant provided by the present invention, under the principle of not altering the conventional structural assembly of the hydrant and the functions to be achieved, the piston cylinder of the piston set is formed through the stainless steel base pipe being enclosed by the plastic sleeve member so as to form a structure having composite materials, thus the processing procedure of the piston cylinder can be simplified and the cost of the stainless steel can be saved, the original structural strength can be remained and the watertight effect can be enhanced; accordingly, the structural improvement of piston set for use in hydrant provided by the present invention is more suitable to be applied in the industrial use and has a better application value. Moreover, the structural improvement of piston set for use in hydrant provided by the present invention is able to solve the disadvantages and shortages existed in the prior art.

[0017] Many modifications and other embodiments of the inventions set forth herein will come to mind to one skilled in the art to which these inventions pertain having the benefit of the teachings presented in the foregoing descriptions and the associated drawings. Therefore, it is to be understood that the inventions are not to be limited to the specific examples of the embodiments disclosed and that modifications and other embodiments are intended to be included within the scope of the appended claims. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.