APPARATUS AND METHOD FOR TAKING SAMPLES

• US 20130220036A1
• Filed: 10/18/2011
• Published: 08/29/2013
• Est. Priority Date: 10/19/2010
• Status: Active Grant

• Current Assignee: Flsmidth A/S (Flsmidth & Company A/S)
• Original Assignee: Flsmidth A/S (Flsmidth & Company A/S)
• Inventors: Faust, Horst
• Granted Patent: US 9,151,699 B2
• Time in Patent Office: Days
• US Class Current: 73/863.41
• CPC Class Codes: G01N 1/02 Devices for withdrawing samples sampling of foundation soil E02D1/04; collecting or conveying radioactive samples G01T7/00, e.g. G01T7/02, G01T7/08
• CPC Class Codes: G01N 1/20 for flowing or falling materials G01N1/2035 G01N1/12, G01N1/14 take precedence
• CPC Class Codes: G01N 1/22 in the gaseous state specially adapted for biological material G01N33/497; measuring breath flow A61B5/087
• CPC Class Codes: G01N 1/2247 Sampling from a flowing stream of gas
• CPC Class Codes: G01N 2001/2092 Cross-cut sampling

Abstract

The invention relates to a device (1) for sampling, comprising a housing (2) having a housing chamber (8) which has two connection openings (10) for connecting one line portion in each case. The device (1) includes a withdrawal element (13) which is movable in the housing chamber (8). The withdrawal element is formed, at least in portions, in a profile-like manner, and bounds a hollow sampling region (19), extending along a profile longitudinal direction course (16), at the periphery of the sampling region, while leaving an entry opening (21) which extends along an opening longitudinal direction course (20). Guide means are provided by means of which a defined movement pattern of the withdrawal element (13) in the housing chamber (8) is predetermined, via which movement pattern at least one of the two opening cross-sections (32) in a projection view perpendicular thereto may be traversed over the entire area by means of the entry opening (21). The invention proposes that as a result of the movement pattern specified by the guide means, an orientation of the withdrawal element (13) in an observation plane which moves with the withdrawal element relative to a geometric intersection line of the observation plane with a nonmoving geometric reference plane which extends perpendicular to the observation plane and to at least one opening cross-section (32), remains the same when the withdrawal element (13) is moved.

Claims

1. A device for sampling, in particular for withdrawing samples from free-flowing and/or liquid and/or gaseous material, comprising a housing having a housing chamber which has two connection openings, spaced apart from one another, for connecting in each case a line portion through which a material flow may flow, the two connection openings in particular having identical opening cross-sections, and

the device including a withdrawal element which is movable in the housing chamber,

the withdrawal element being formed, at least in portions, in a profile-like manner, the withdrawal element bounding a hollow sampling region, extending along a profile longitudinal direction course, at the periphery of the sampling region, while leaving an entry opening which in particular is slit-like and which extends along an opening longitudinal direction course,

guide means being provided by means of which a defined movement pattern of the withdrawal element in the housing chamber is predetermined, via which movement pattern at least one of the two opening cross-sections in a projection view perpendicular thereto may be traversed over the entire area by means of the entry opening,

as a result of the movement pattern specified by the guide means, an orientation of the withdrawal element in an observation plane which moves with the withdrawal element relative to a geometric intersection line of the observation plane with a nonmoving geometric reference plane which extends perpendicular to the observation plane and to at least one opening cross-section, remaining the same when the withdrawal element is moved,

wherein the opening longitudinal direction course of the withdrawal element extends, in particular in an even manner, along a geometric spherical surface, and that a movement path or movement pattern of the withdrawal element extends geometrically in a circular direction about a rotational axis.

14. The method of claim 13, Wherein a device according to one or more of claims 1 to 12 is used.

2. A device for sampling, in particular for withdrawing samples from free-flowing and/or liquid and/or gaseous material,

comprising a housing having a housing chamber which has two connection openings, spaced apart from one another, for connecting in each case a line portion through which a material flow may flow, the two connection openings in particular having identical opening cross-sections, and

the device including a withdrawal element which is movable in the housing chamber,

the withdrawal element being formed, at least in portions, in a profile-like manner, the withdrawal element bounding a hollow sampling region, extending along a profile longitudinal direction course, at the periphery of the sampling region, while leaving an entry opening which in particular is slit-like and which extends along an opening longitudinal direction course,

guide means being provided by means of which a defined movement pattern of the withdrawal element in the housing chamber 44 is predetermined,

a line portion being connected to each of the two connection openings, from which one line portion extends horizontally or substantially horizontally, or from which both line portions extend horizontally or substantially horizontally

wherein the opening longitudinal direction course of the withdrawal element extends, in particular in an even manner, along a geometric spherical surface, and that a movement path or movement pattern of the withdrawal element extends geometrically in a circular direction about a rotational axis.

3. The device of claim 2, wherein a back surface of the withdrawal element facing away from the entry opening extends longitudinally and transversely with respect to the opening longitudinal direction course along a spherical surface, and that the housing chamber has an inner wall portion between the two connection openings which extends along a geometric spherical surface and conforms without play or with little play to the surface of the withdrawal element during a portion of its movement.

4. The device of claim 2, wherein the withdrawal element may be completely moved, in a projection view in each case perpendicular to the opening cross-sections, out of an overlap with one opening cross-section or with both opening cross-sections.

5. The device of claim 4, wherein the withdrawal element, at two possible positions within its movement path which are opposite one another, may be completely moved, in a projection view in each case perpendicular to the opening cross-sections, out of an overlap with one opening cross-section or with both opening cross-section.

6. The device of claim 2, wherein the withdrawal element has a grooved shape, at least in portions, or is formed as an elongated hollow body that is slitted along its opening longitudinal direction course, in particular as a slitted tube-like hollow body, which at at least one lengthwise end of the hollow sampling region merges into an exit opening which in particular is enclosed along its entire periphery.

7. The device of claim 2, wherein the length of the entry opening corresponds to at least the maximum extent of at least one of the opening cross-sections in at least one of the cross-sectional directions, and in particular corresponds at least to the diameter (D) of the free opening cross-section.

8. The device of claim 2, wherein the width (b) of the entry opening transverse to the opening longitudinal direction course and/or the width of the cross-section of the hollow sampling region transverse to the profile longitudinal direction course is/are continuous, or constant at least in portions, and is/are smaller than the maximum extent, in particular smaller than the diameter (D), of the free opening cross-section of the connection openings.

9. The device of claim 2, wherein the opening cross-sections of the two connection openings are situated parallel to one another at a distance from one another, and situated concentrically with respect to one another in a projection direction perpendicular to their cross-sectional planes.

10. The device of claim 2, wherein the movement direction of the withdrawal element is oriented transversely, in particular perpendicularly, with respect to the opening longitudinal direction course of the withdrawal element or of the hollow sampling region.

11. The device of claim 2, wherein a drive device, in particular an electric, pneumatic, or hydraulic drive or the like, is provided for the movement drive of the withdrawal element, the drive device being adapted to a movement of the withdrawal element at a constant speed or at a speed that varies with time.

12. The device of claim 2, wherein there is no rotational stop, so that the withdrawal element may rotate about its rotational axis without limitation.

13. A method for sampling, in particular for withdrawing samples from free-flowing and/or liquid and/or gaseous material, comprising the following method steps:

providing a device for sampling, comprising a housing having an inner housing chamber which has two connection openings, spaced apart from one another, for connecting in each case a line portion through which a material flow may flow, the two connection openings in particular having identical opening cross-sections, and

the device including a withdrawal element which is movable in the housing chamber,

the withdrawal element being formed, at least in portions, in a profile-like manner, the withdrawal element bounding a hollow sampling region, extending along a profile longitudinal direction course, at the periphery of the sampling region, while leaving an entry opening which in particular is slit-like and which extends along an opening longitudinal direction course,

guide means being provided by means of which a defined movement pattern or movement path of the withdrawal element in the housing chamber is predetermined, along which at least one of the two opening cross-sections in a projection view perpendicular thereto may be traversed over the entire area by means of the entry opening,

while a material flow is conducted through the housing chamber by means of the two connection openings, the withdrawal element being moved through the housing chamber, so that the orientation of the withdrawal element in an observation plane which moves with the withdrawal element relative to a geometric intersection line of the observation plane with a nonmoving geometric reference plane which extends perpendicular to at least one opening cross-section, remains the same when the withdrawal element is moved,

wherein a device is used, for which the opening longitudinal direction course of the withdrawal element extends, in particular in an even manner, along a geometric spherical surface, and for which a movement path or movement pattern of the withdrawal element extends geometrically in a circular direction about a rotational axis (14).

15. The method according to claim 13, wherein during a collection operation, the flow cross-section is traversed by the entry opening of the withdrawal element in a projection view, one or more times over the entire area, or that a continuous sample discharge is provided, multiple cross-sectional traversals by the withdrawal element taking place over a collection period of any desired length.