Exhaust air conduit for a coating agent pump

Patent metadata

Field	Value
Publication number	US-10697443-B2
Application number	US-201515309448-A
Country	US
Kind code	B2
Filing date	May 4, 2015
Priority date	May 8, 2014
Publication date	Jun 30, 2020
Grant date	Jun 30, 2020

Abstract

An exhaust air conduit for a pneumatically powered pump, in particular, from a coating agent pump in a painting plant, is provided. The conduit includes an inlet for receiving the exhaust air from the pump, an outlet for discharging the exhaust air, and an exhaust air channel in which the exhaust air flows from the inlet to the outlet of the exhaust air conduit, and a housing member in which the exhaust air channel extends. A first thermal insulation element is provided in the region of a direction change of the exhaust air channel, in order to prevent an accumulation of the exhaust air directly at the inner wall of the exhaust air channel and thereby to lessen the cooling of the housing member.

First claim

The invention claimed is:

1. An exhaust air conduit for a pneumatically powered pump, the exhaust air conduit comprising:
a housing member;
a first insulation element mechanically coupled to the housing member and at least partially extending into the housing member, the first insulation element having less thermal conductivity than the housing member;
an exhaust air channel extending between an inlet and an outlet, the inlet opening into the housing member,
the housing member configured to receive exhaust air from a pump, the housing member configured to receive the volume of exhaust air at the inlet,
the outlet configured to discharge the exhaust air, the exhaust air channel having a first part disposed between the inlet and an opening into the first insulation element, the exhaust air channel having a second part axially extending between the opening into the first insulation element and the outlet, the inlet being radially spaced from the second part of the exhaust air channel,
wherein the first part of the exhaust air channel extends in a first direction obtuse to an exterior surface of the first insulation element within the housing member, the first part of the exhaust air channel having a direction change at the exterior surface of the first insulation element,
wherein the exhaust air channel, from the inlet to the outlet, has a maximum cross-sectional area at the inlet,
wherein a damper body is mechanically coupled to the housing member and thermally decoupled from the housing member, the damper body defining a chamber therein that is fluidly connected to the outlet of the exhaust air channel, the damper body being configured to receive the exhaust air discharged from the outlet, accommodate expansion of the exhaust air, and discharge the exhaust air,

wherein the damper body is mechanically coupled to the housing member with the first insulation element in series therebetween.

2. The exhaust air conduit of claim 1 , wherein the first insulation element thermally decouples the damper body from the housing member.

3. The exhaust air conduit according to claim 2 , wherein the first insulation element includes a plastic material.

4. The exhaust air conduit according to claim 1 , wherein a diaphragm valve with an elastic diaphragm is coupled in the housing member in fluid communication with the exhaust air channel, and the elastic diaphragm is a second insulation element.

5. The exhaust air conduit according to claim 1 , wherein the housing member is metallic.

6. A coating agent pump with an exhaust air conduit according to claim 1 .

7. The coating agent pump according to claim 6 , further comprising:
a first pumping cylinder,
a first piston which is displaceably coupled in the first pumping cylinder,
a second pumping cylinder,
a second piston which is displaceably coupled in the second pumping cylinder,
a coating agent inlet member opening into both the first and second pumping cylinders,
a coating agent outlet member opening into both the first and second pumping cylinders,
a piston rod coupled to each of the first piston and the second piston and configured to drive the first and second pistons,
a pneumatic cylinder, and
a third piston coupled in the pneumatic cylinder, the third piston configured to drive the piston rod.

8. The coating agent pump according to claim 7 , further comprising:
a first non-return valve arranged in the first piston,
a second non-return valve arranged in the second piston,
a third non-return valve arranged in the coating agent outlet member at the first pumping cylinder, and
a fourth non-return valve arranged in the coating agent outlet member at the second pumping cylinder,
wherein a valve is configured to control feed air into the pneumatic cylinder and the exhaust air out of the pneumatic cylinder, and
the first, second, and the third pistons are, respectively, coaxially arranged with each other and are each directly connected to the piston rod.

9. The exhaust air conduit according to claim 1 , wherein the second part of the exhaust air channel is defined within the first insulation element.

Assignees

• Duerr Systems Ag

Inventors

• Preuss Kevin
• Gerlach Roland
• Schäfer Ralf

Classifications

• F04B43/073

  the actuating fluid being controlled by at least one valve · CPC title

• F04B15/00

  Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts · CPC title

• F04B23/06

  the pumps being all of reciprocating positive-displacement type · CPC title

• F04B7/0266

  the inlet and discharge means being separate members · CPC title

• F04B9/133 Primary

  reciprocating movement of the pumping members being obtained by a double-acting elastic-fluid motor · CPC title