Flush valve, dust collector and dust collection system

Patent metadata

Field	Value
Publication number	US-11458430-B2
Application number	US-202017037801-A
Country	US
Kind code	B2
Filing date	Sep 30, 2020
Priority date	Oct 7, 2019
Publication date	Oct 4, 2022
Grant date	Oct 4, 2022

Abstract

A flush valve, a dust collector provided with such a flush valve and a dust collection system, are disclosed. The flush valve includes a valve body and a valve spool. The valve body is internally provided with a fluid passageway. The valve body is provided with an inlet, a first outlet and a second outlet. The first outlet is fluidly connected to a device to be flushed. The valve spool includes a movable part, a fixed part and an elastic part, the fixed part being provided in the valve body, and the elastic part elastically connecting said fixed part to the movable part. One end of the movable part being provided with a first spool land for blocking the first outlet. The first spool land being configured to be pushed away from said first outlet by fluid in the fluid passageway when the pressure drops due to blockage.

First claim

What is claimed is:

1. A flush valve for use in a dust collector, said flush valve comprising:
a valve body, and
a valve spool, wherein the valve body is internally provided with a fluid passageway, and the valve body is provided with an inlet, a first outlet and a second outlet, wherein said fluid passageway fluidly connects said inlet to said first and second outlets, and whereby said first outlet is adapted to be fluidly connected with a device to be flushed,
said valve spool comprising a movable part, a fixed part and an elastic part, wherein the fixed part is provided in the valve body, wherein the elastic part is elastically connected between the fixed part and the movable part, wherein one end of the movable part is provided with a first spool land for blocking said first outlet, and
said first spool land being configured to be pushed away from said first outlet by a fluid in said fluid passageway to enable flushing said device to be flushed when the pressure of said device to be flushed drops due to blockage.

2. The flush valve according to claim 1 , wherein said movable part is further provided with a second spool land, said second spool land being configured to block said second outlet when said first spool land does not close off said first outlet.

3. The flush valve according to claim 1 , wherein an installation cavity is arranged in the valve body, said installation cavity and said fluid passageway being arranged at intervals, and said fixed part being provided inside said installation cavity.

4. A dust collector comprising:
a Venturi negative pressure generating part configured to generate negative pressure through a Venturi effect,
a dust collection part configured to collect dust through the negative pressure generated by said Venturi negative pressure generating part,
a filter part constituting a device to be flushed, said filter part being arranged between said dust collection part and said Venturi negative pressure generating part to define a filtered space, and
the flush valve according to claim 1 , wherein the second outlet of said flush valve is fluidly connected to said the Venturi negative pressure generating part, and said first outlet of the flush valve is fluidly connected with said filter part.

5. The dust collector according to claim 4 , wherein said dust collector is configured to be connected with an air source through said inlet of said flush valve, and said Venturi negative pressure generating part comprises a Venturi tube, and said second outlet is fluidly connected to said Venturi tube.

6. The dust collector according to claim 5 , wherein said dust collector further comprises:
a second air delivery pipe, said second air delivery pipe being fluidly connected to said second outlet, and
a spray head of said second air delivery pipe being adapted to extend into a nozzle of said Venturi tube.

7. The dust collector according to claim 6 , wherein said Venturi tube is provided with an air delivery pipe mounting hole and an airflow collection area, said air delivery pipe mounting hole being fluidly connected to said second air delivery pipe, and said airflow collection area being configured to collect airflow from said dust collection part.

8. The dust collector according to claim 7 , wherein said air delivery pipe mounting hole and said airflow collection area are both positioned at the same axial end of said Venturi tube, and a pipe mounting ring is arranged between said air delivery pipe mounting hole and said second air delivery pipe.

9. The dust collector according to claim 5 , wherein said dust collection part comprises a housing, said Venturi tube and said filter part both are mounted in said housing, and a dust collection space is formed inside said housing but outside said filter part.

10. The dust collector according to claim 9 , wherein a gas collection device is arranged outside said housing, said gas collection device being fluidly connected to said Venturi negative pressure generating part, said dust collector further comprising a vacuum gauge outside said housing for measuring the air pressure of the filtered space.

11. The dust collector according to claim 9 , wherein a dust carrying arrangement is configured to be detachably mounted below the housing, the dust carrying arrangement being in fluid communication with said dust collection space, and wherein extendable legs are arranged outside said housing, said legs being adapted to elevate and support said housing to form a space suitable for mounting said dust carrying arrangement at least partially underneath said housing.

12. The dust collector according to claim 11 , wherein a sliding support is provided which is configured to extend downwards out of the housing, said sliding support being adapted to support said housing.

13. A dust collection system, comprising a dust hood, a connecting pipe and the dust collector according to claim 4 , wherein the connecting pipe is connected between the dust hood and the dust collector.

Assignees

• Atlas Copco Airpower Nv
• Atlas Copco Airpower Naamlooze Vennootschap

Inventors

• Rajput Prashant K
• Patil Vishal Krishnarao
• Sharma Vijay Sohanlal
• Arjune Srinivasan Venkataramani

Classifications

• F16K11/04 Primary

  comprising only lift valves · CPC title

• B01D46/71

  with pressurised gas, e.g. pulsed air · CPC title

• A47L7/0095

  Suction cleaners or attachments adapted to collect dust or waste from power tools · CPC title

• B01D46/446

  by pressure measuring · CPC title

• F16K27/0263

  multiple way valves · CPC title