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Check Valve for Abrasive Blaster Pressure Vessel

a technology of abrasive blaster and pressure vessel, which is applied in the direction of mechanical equipment, functional valve types, transportation and packaging, etc., can solve the problems of inefficient method of closing the pressure system, and achieve the effect of reducing the likelihood of backflow

Inactive Publication Date: 2012-09-27
NGUYEN PHUONG TAYLOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is about a check valve assembly used in an abrasive blaster. The check valve is positioned in the pressure line upstream of the mushroom pop-up valve and is designed to prevent back flow into the external system. It includes a valve body with a valve chamber and a valve mechanism that opens and closes the valve chamber in response to the differential pressure level in the pressure system. The check valve also has a bleed hole for balancing the system during low pressure conditions. The ball valve is normally closed but can be opened when the pressure is high enough to lift the mushroom pop-up valve. When the pressure is relieved, the ball drops into the seat and closes off the pressure system as soon as pressure is low enough to permit the ball to drop. This prevents abrasive particles from back flowing into the system. The bleed hole provides a balancing feedback function and can be much smaller than the main valve bore. The ball valve can be biased towards the seat by gravity or other biasing means such as a compression spring or the like.

Problems solved by technology

However, it has been determined that this is an inefficient method for closing the pressure system to back flow of some of the particles.

Method used

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  • Check Valve for Abrasive Blaster Pressure Vessel
  • Check Valve for Abrasive Blaster Pressure Vessel
  • Check Valve for Abrasive Blaster Pressure Vessel

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Embodiment Construction

[0021]The check valve system 10 of the subject invention is adapted to be used in combination with the pressure vessel of an abrasive blaster system. As shown in FIG. 1, the pressure vessel 11 may be stationary or portable. When portable, the vessel 11 is mounted on a frame 12 having wheels 14, a load skid 16 by which the vessel may be stowed in a horizontal orientation, and a handle 18 for facilitating movement of the pressure vessel.

[0022]The pressure vessel 11 is subdivided into a plurality of chambers, and as here shown includes the upper chamber or pot 19 for holding the abrasive. The lower chamber 20 is the pressurized chamber. A source of pressurized fluid, typically air, is introduced into the vessel 11 and the pressure chamber 19 through an inlet pipe 22. The inlet pipe 22 is typically connected to piping and valves coupled to a source of pressurized air (not shown). The abrasive chamber 19 includes a lower inlet 24 through which the pressurized fluid flows to mix with the ...

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PUM

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Abstract

A check valve is installed in the pressure flow line of an abrasive blaster of the type having a pop-up valve which opens under pressure and closes when depressurized to a predetermined level. The check valve is upstream of the pop-up valve and includes a having a valve chamber in communication with the pressure system for seating a valve mechanism adapted for opening and closing the valve chamber in response to the pressure level in the pressure system for closing the pressure system to back flow when the pressure in the system reaches a predetermined level.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001]This application is a continuation of U.S. patent application Ser. No. 12 / 001,339 filed on Jan. 26, 2008 and claims full priority based on that application, such application fully incorporated herein by reference.BACKGROUND OF THE INVENTION [0002]1. Field of the Invention[0003]The invention is generally related to abrasive blaster system and is specifically directed to a balancing system for controlling backflow of abrasive into the pressure system during blow down operations.[0004]2. Discussion of the Prior Art[0005]Abrasive blaster systems are well known. Typical abrasive blaster include the 1.5, 3.5, 6.5, 8, 10 and 20 cubic feet abrasive blasters manufactured and sold by Axxiom Manufacturing, Inc., Fresno, Tex., USA and sold under the brand name SCHMIDT. These systems include a pressure vessel or tank having two chambers, a pressure chamber and an abrasive chamber. In order for the system to operate properly, the pressure chamber and ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F16K15/00
CPCH04B1/7156H04L5/0037H04L5/0023H04B2001/71563Y10T137/7904Y10T137/7838
Inventor NGUYEN, PHUONG TAYLOR
Owner NGUYEN PHUONG TAYLOR