The present invention related to drain-proof of valves, and in particular to a wear-resistant valve assembly.
With reference to
In above mentioned prior art structure, although the drain proof ring 32′ and the drain proof washer 33′ have the effect of water proof, but as the valve is used for a long time, it is possible that the frictions between the drain proof ring, drain proof washer and the valve seat will damage the valve assembly so that the drain proof effect is deteriorated.
Therefore, there is an eager demand for a novel device which can improve the prior art defect and has the effect of enhancing the seal effect between the elements of the valve unit. However, it is helpful to prolong the lifetime of the valve.
Therefore, there is an eager demand for a novel design which can improve the above mentioned defects.
Accordingly, the object of the present invention is to provide wear-proof valve assembly, wherein a valve disk wear-resistant layer is in contact with a valve body wear-resistant layer and a drain-proof-ring wear-resistant layer is in contact with a valve seat wear-resistant layer, and thus the wear proof effect of the valve is preferred than those of no wear-resistant. Therefore, even the valve is used for a longer time, the drain-proof of the valve is retained as the original valve. The lifetime of the valve is prolonged and the maintenance work is reduced greatly.
In order that those skilled in the art can further understand the present invention, a description will be provided in the following in details. However, these descriptions and the appended drawings are only used to cause those skilled in the art to understand the objects, features, and characteristics of the present invention, but not to be used to confine the scope and spirit of the present invention defined in the appended claims.
With reference to
The structure of the present invention has the following elements.
A valve body 1 has a chamber 10 therein.
A stem 2 penetrates through the valve body 1 so as to protrude into the chamber 10 (see
A valve disk 31 is installed in the chamber 10 of the valve body 1 and contacts an inner wall of the valve body 1. A radial hole 310 (see
The feature of the present invention is that a valve body wear-resistant layer 105 is formed at an inner ring area of the valve body, which is also at a position contacting the valve disk 31. The valve body wear-resistant layer 105 is made of carbon alloy, such as tungsten carbide or chromium carbide; or satellite alloy such as stellite-6, stellite-12, stellite-20. In manufacturing, the valve body wear-resistant layer 105 is formed by the method of flame ultrasonic spray.
A valve disk wear-resistant layer 315 is formed on an outer ring of the valve disk 31 at a position contacting the valve body 1. The the valve disk wear-resistant layer 315 is made of carbon alloy, such as tungsten carbide or chromium carbide; or satellite alloy such as stellite-6, stellite-12, stellite-20. In manufacturing, the valve disk wear-resistant layer 315 is formed by the method of flame ultrasonic spray.
In assembly, the valve disk 31 is installed in the chamber 10 of the valve body 1 and contacts an inner wall of the annular seat 30. The stem 2 passes through radial hole 310 along the valve disk 31 so that rotation of the stem 2 will rotate the valve disk 31 for opening or closing the valve. At this state, the valve body wear-resistant layer 105 is in contact with the valve disk wear-resistant layer 315. Due to the wear-resistant effect of the two wear-resistant layers, the wearing in the valve body 1 and the valve disk 31 is greatly reduced. Thus the drain-proof of the valve is retained as the original valve. As a result the lifetime of the valve is prolonged. Maintenance and repairing works of the valve is reduced.
Furthermore, in one embodiment of the present invention, the valve disk 31 of the present invention is formed as a triple-eccentric structure. The detail will be described herein with referring to
A maximum radial axis P of the valve disk 31 is shifted with a distance A from a radial line P′ passing transversal center of the chamber 10 (see
Furthermore, an axial central line Q of the valve disk 31 is shifted from an axial center line Q′ of the chamber 10 of the valve body 1.
With reference to
As illustrated in
A valve disk wear-resistant layer 315 is formed on an outer ring of the valve disk 31 at a position contacting the valve body 1. The valve disk wear-resistant layer 315 is made of carbon alloy, such as tungsten carbide or chromium carbide; or satellite alloy such as stellite-6, stellite-12, and stellite-20. In manufacturing, the valve disk wear-resistant layer 315 is formed by the method of flame ultrasonic spray.
With reference to
An annular seat 30 is received in an annular trench formed in a wall of the chamber 10. A radial cross section of the annular seat 30 has a trapezoidal shape. In the present invention, the annular seat 30 is detachable.
A drain proof structure 3 includes the following elements:
A drain-proof ring 32 is an O ring and is arranged at an outer side of the valve disk 31 to resist against the valve seat 30.
The drain-proof ring 32 is preferably made of silicon gal or graphite or PTEF, etc. In assembly state, a periphery of the drain-proof ring 32 resists against an inner wall of the annular seat 30 so as to tightly seal the space between the drain-proof ring 32 and the annular seat 30.
A waterproof washer 33 is a ring and is received in the annular trench at one side of the valve disk 31 and is between the valve disk 31 and the rain proof ring 32. Preferably, the waterproof washer 33 is made of metal or metal alloy.
As illustrated in
A valve disk wear-resistant layer 315 is formed on an outer annular area of the valve disk 31 at a position contacting the valve body 1. The valve disk wear-resistant layer 315 is made of carbon alloy, such as tungsten carbide or chromium carbide; or satellite alloy such as stellite-6, stellite-12, and stellite-20. In manufacturing, the valve disk wear-resistant layer 315 is formed by the method of flame ultrasonic spray.
Moreover, as illustrated in
A valve seat wear-resistant layer 305 is formed on an inner annular area of the annular seat 30 at a position contacting the valve disk 1. The valve seat wear-resistant layer 305 is made of carbon alloy, such as tungsten carbide or chromium carbide; or satellite alloy such as stellite-6, stellite-12, and stellite-20. In manufacturing, the valve body wear-resistant layer 105 is formed by the method of flame ultrasonic spray. With reference to
Referring to
Moreover, the valve disk wear-resistant layer 315 is in contact with the valve body wear-resistant layer 105 and the drain-proof-ring wear-resistant layer 325 is in contact with the valve seat wear-resistant layer 305, and thus the wear proof effect of the valve is preferred than those of no wear-resistant. Therefore, even the valve is used for a longer time, the drain-proof of the valve is retained as the original valve. The lifetime of the valve is prolonged and the maintenance work is reduced greatly.
The present invention is thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.