WO1992012409A1 - Device for taking samples of loose materials, particularly feeding mixtures - Google Patents
Device for taking samples of loose materials, particularly feeding mixtures Download PDFInfo
- Publication number
- WO1992012409A1 WO1992012409A1 PCT/CS1991/000003 CS9100003W WO9212409A1 WO 1992012409 A1 WO1992012409 A1 WO 1992012409A1 CS 9100003 W CS9100003 W CS 9100003W WO 9212409 A1 WO9212409 A1 WO 9212409A1
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- WIPO (PCT)
- Prior art keywords
- cylindrical
- hollow sleeve
- sampling
- rotatably
- jacket
- Prior art date
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/20—Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/20—Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials
- G01N2001/2007—Flow conveyors
- G01N2001/2021—Flow conveyors falling under gravity
Definitions
- the invention relates to a device for taking samples of loose materials, particularly feeding mixtures, comprising a cylindrical sampling shovel with an inlet opening being controlled in the direction of shifting into a sealed through chamber arranged in a transport duct and back by a pneumatic cylinder.
- said device consists of a sealed through chamber arranged in a transport duct into which passes from a side a shiftable sampling tube, the open end of which is directed against the direction of the loose material flow, mentioned sampling tube being controlled by a control piston.
- the other end of the shiftable sampling tube leads out of the sealed chamber into a flexible tube designed to supply the sample of loose material to the analyzer.
- Another known device contains a rotary sampling tube arranged inclined up in the transport duct.
- the sampling tube inside the transport duct is provided with a channellike inlet and on the outside with a gear ring for rotary motoric adjustment of opened part of the sampling tube in the flow of loose material into the position to take sampie or into closed position.
- a shortcoming of the device with shiftable sampling tube is that mentioned device reaches by its opened end into the flow of loose material only in one place of the transport duct cross section and taken sample contains the components of the loose material which flow at this moment in this piece of the cross section.
- the sample contains also a relatively larger quantity of components flowing at the wall of the transport duct than in its central part. It is because the opened end of the sampling tube when moving in and out is a considerably longer time in the zone at the wall of the transport duct than in the zone remote from mentioned wall.
- Mentioned shortcoming is partly eliminated by another device with rotary sampling tube in which opened part of the sampling tube faces the flow of loose material by its whole surface for the same time, but again only in one place of the transport duct cross section and taken sample of loose material is again not satisfactory representative.
- the fact that the sampling tube is all the time inside the transport duct causes constant interference of the flow of air and of loose material between two samplings.
- a device for taking samples of loose materials, particularly feeding mixtures consisting of a cylindrical sampling shovel with an inlet opening being controlled in the direction of shifting in a sealed through chamber arranged in. a transport duct and back by a pneumatic cylinder according to the invention, the subject matter of which is that to sealed chamber is fixed a hollow sleeve of a sampling mechanism with in its interior shiftably located cylindrical cover rotatably located on a cylindrical sampling shovel, while in cylindrical jacket of hollow sleeve there is a rotatably located control ring which is in mesh on the one hand with a pinion of a controlling electric motor, on the other hand with cylindrical cover which is in its jacket provided with an inlet and outlet opening and said sampling shovel is provided with a bottom with center flange which is rotatably located on a piston rod of a pneumatic cylinder and which is provided with a radially directed guiding finger for shiftable location in a securing groove being formed longitudinally in internal surface of hollow
- the bottom of the hollow sleeve is provided with a couple of by 180° from each other located stop pins reaching into a cylindrical cavity between bottom of cylindrical cover and bottom of a hollow sleeve for a contact with guiding finger of sampling shovel which is in its bottom provided with a limiting pin reaching into a curved groove provided in bottom of cylindrical cover.
- hollow sleeve of sampling mechanism leads from a side perpendicularly into central part of a duct portion of a transport duct which is located rotatably between a couple of side fix parts of a duct portion, while it is provided with a gear ring being in mesh with a pinion of a driving electric motor which is fixed to a fix part of a duct portion.
- fix part of duct portion is surrounded by a collecting collar formed by an internal cylindrical jacket and coaxial external cylindrical jacket mutually interconnected by a chute bottom inclined towards an outlet throat, while collecting collar is provided with an annular cover located slidably rotatably on upper edges of internal cylindrical jacket and external cylindrical jacket and with a connecting throat fixed to a delivery throat of a sampling mechanism.
- Fig.1 is a schematic front view of the device for taking samples
- Fig.2 is a longitudinal axial section of the sampling mechanism in a front view along line II-II in Fig.3
- Fig.3 is a transversal section of the sampling mechanism along line III-III in Fig.2
- Fig.4 is a fro schematic view of the device with attached collecting collar
- Fig.5 is a vertical axial section of the collecting collar in front view
- Fig.6 is a ground plan of the collecting collar.
- Description of preferred embodiment Device for taking samples contains a duct portion 1 -Fig 1- the ends of which are provided with fix parts 2,3 with flanges 4 for connection with adjacent parts 5,6 of transport duct.
- Central part of duct portion 1 forms a rotary located sealed chamber 7. and a sampling mechanism 9. is fixed perpendicularly to jacket 8 of said chamber 7.
- a gear ring 10 which is in mesh with a pinion 11 located fixedly on the shaft of a driving elec trie motor 12 which is fixed to fix part 2 of duct portion
- Sampling mechanism 9 -Fig.2- consists of a two-part cylindrical hollow sleeve 13 located by its opened end in an opening 14 of jacket 8 of sealed chamber 7. while it is fixed to said jacket 8 for example by not shown screws.
- hollow sleeve 13 there is a shiftably and rotatably located cylindrical cover 15 provided at its opened end at jacket 8 of sealed chamber 7 with inlet and outlet opening 16 of the same size and shape like inlet opening 17 in sampling sho- vel 18.
- Sampling shovel 18 is located ro tatably in cylindrical cover 15 and consists of a hollow cylindrical body which is at jacket 8 of sealed chamber 7 closed by a fix cover 19 which forms a part of jacket 8 of sealed chamber 2 when sampling shovel 8 is in the position when no sample is being taken.
- sampling shovel 18 The interior of sampling shovel 18 is provided with a fix partition 20 limiting the length of its effective space 21 to a value corresponding with the length of inlet openning 17.
- Sampling shovel 18 is provided with bottom 22 with central flange 23 by which the sampling shovel 18 is rotatably locatd on a piston rod 24 of a pneumatic cylinder 25 which is fixed to bottom 26 of hollow sleeve 13.
- Cylindrical cover 15 is by its bottom 27. located rotat ⁇ bly on central flange 23. Connection of piston rod 24 with flange 23 enabling free rotary motion of central flange 23 of sampling shovel 18 and at the same time its forward and backward motion performed by piston rod 24.
- a guiding finger 31 To outer face of central flange 23 is fixed a guiding finger 31. which is arranged in a cylindrical hollow 32 between bottom 26 of hollow sleeve 13 and bottom 27 of cylindrical cover 15, where it can freely rotate together with central flange 23. Guiding finger 31 reaches by its free end into securing groove 33 made longitudinally in a part of hollow sleeve 13, while it corresponds with the length of maximum extension of piston rod 24.
- Bottom 27 of cylindrical cover 15 is provided with a curved groove 52 into which reaches a limiting pin 53 fixedly located in bottom 22 of sampling shovel 18, limiting pin 53 serves to limit maximum relative motion between cylindrical cover 15 and sampling shovel 18.
- bottom 26 of hollow sleeve 13 there are two fix stop pins 54 and 55 which reach into cylindrical hollow 32 and are arranged on a pitch circle under the angle of 180°.
- a control ring 34 In central pert of the length of hollow sleeve 13 is arranged a control ring 34 which slidably penetrates the wall of hollow sleeve 13 and by an entraining lug 35 created on internal surface of control ring 34 and reaching into a guiding groove 36 it is connected with cylindrical cover 15 which is shiftably arranged in control ring 34.
- Control ring 34 is in mesh with pinion 37 fixedly located on output shaft 38 of controlling electric motor 39. Because the control ring 34 divides the hollow sleeve 13 into two parts, said two parts are provided on the outside of control ring 34 with connecting flanges 40 connected for example by not shown screws.
- Hollow sleeve 13 is at jacket 8 of sealed chamber 2 provided with outlet opening 41 of loose material communicating with inlet and outlet opening 16 of cylindrical cover 15 end with inlet opening 17 of sampling shovel 18. Delivery throat 42 of a not shown delivery duct is connected to outlet opening
- Collecting collar 43 -Fig.5- is formed by internal cylindrical jacket 44 and coaxially with it arranged external cylindrical jacket 45 which are mutually connected by a chute bottom 46 inclined towards the lowest point where the chute bottom 46 continues in outlet throat 48 to which is connected a not shown delivery duct.
- Internal space 49 of collecting collar 43 is closed from up by an annular cover 50 located slidably rotatably on upper edges of internal cylindrical jacket 44 and external cylindrical jacket 45. Between each of the jackets 44,45 and annular cover 50 there is arranged a not shown seal, for example a usual labyrinth packing.
- Annular cover 50 is fixedly connected with sampling mechanism 9 by connecting throat 51.
- Cylindrical cover 15 Due to reverse motion of cylindrical cover 15 friction causes again entrainment of sampling shovel 18 until guiding finger 31 leans against further stop pin 54 whet stops entrainment of sampling shovel 18 and free end of guiding finger 31 gets in alignment with securing groove 33. Cylindrical cover 15 continues in its rotary motion during which said inlet opening is closed again, while the other end of curved groove 52 leans against limiting pin
- driving electric motor 12 is set in operation and electric motor 1 2 sets by its pinion 11 a gear ring 10 into rotary motion as well as central part of duct portion 1 located rotatably between fix parts 2 and 3 forming sealed chamber 2 with attached sampling mechanism J9.
- annular cover 50 rotates also and byits peripheral part it slides over upper edges of internal cylindrical jacket 44 and external cylindrical jacket 45.
- the device according to the invention can be used to take samples of loose material, for example cement, feeding mixtures and similar materials, especially in the cases when it is necessary to obtain objectively representative sample.
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- Hydrology & Water Resources (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
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- General Health & Medical Sciences (AREA)
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- Sampling And Sample Adjustment (AREA)
Abstract
The device containing a cylindrical sampling shovel (18) with inlet opening (17) being controlled in the direction of shifting inside sealed through chamber (7) arranged in a transport duct and back by pneumatic cylinder (25), to sealed chamber (7) is fixed a hollow sleeve (13) of sampling mechanism (9) with in the interior shiftably located cylindrical cover (15) rotatably located on cyindrical sampling shovel (18), while in cylindrical jacket of hollow sleeve (13) there is rotatably located control ring (34) which is in mesh on the one hand with pinion (37) of controlling electric motor (39), on the other hand with cylindrical cover (15) provided in its jacket with inlet and outlet opening (16) and the sampling shovel (18) is provided with bottom (22) with central flange (23) which is rotatably located on piston rod (24) of pneumatic cylinder (25) and it is provided with radially directed guiding finger (31) for shiftable location in securing groove (33) formed longitudinally in internal surface of hollow sleeve (13). Bottom (26) of hollow sleeve (13) can be provided with a couple of stop pins (54, 55) for a contact with a guiding finger (31) of sampling shovel (18) which can be in its bottom (22) provided with limiting pin (53) reaching into curved groove (52) in bottom (27) of cylindrical cover (15). Sealed chamber (7) can be located in the transport duct with the possibility to rotate by means of gear ring (10) and driving electric motor (12). Fix part (3) of the transport duct can be surrounded by collecting collar (43) with chute bottom (46) inclined towards the outlet throat (48).
Description
Device for taking samples of loose materials particularly feeding mixtures
Background of the invention
The invention relates to a device for taking samples of loose materials, particularly feeding mixtures, comprising a cylindrical sampling shovel with an inlet opening being controlled in the direction of shifting into a sealed through chamber arranged in a transport duct and back by a pneumatic cylinder.
Known state of the art
In many industrial branches, such as in the production of building materials, e.g. cement, in the food industry and in agriculture when preparing food mixtures and feeding mixtures consisting of a series of raw materials, it is necessary to check regularly the composition of said mixtures to be able to perform necessary corrections of the quantity of individual incoming raw materials already during the preparation of the mixture. To perform said analysis it is necessary to take representative samples of the mixture directly from the flow of loose material.
To take said samples sampling devices have been designed said devices are usually arranged in the system of other devices such as cyclone separator, homogenizer, dosirgmechanism for the analyzer and the actual analyzer.
Taking of the samples is usually performed so, that a part of the loose raw-material mixture flow is left to fall due to its own weight into a del very duct and from here it is supplied into a dosing mechanism of an analyzer, for example into collecting containers. Mentioned solution is ve
ry primitive. Because the structure of taken sample depends up to a considerable degree on the dimensions of individual components of loose raw-materials mixture, mentioned samples, especially when preparing feeding mixtures containing components from powder size up to several centimeters length, because the materials in question are for example complete or ground grains, hay, dried waste from the production of food, etc., are not sufficiently representative.
For this reason a device to take samples of loose materials has been designed, said device consists of a sealed through chamber arranged in a transport duct into which passes from a side a shiftable sampling tube, the open end of which is directed against the direction of the loose material flow, mentioned sampling tube being controlled by a control piston. The other end of the shiftable sampling tube leads out of the sealed chamber into a flexible tube designed to supply the sample of loose material to the analyzer.
Another known device contains a rotary sampling tube arranged inclined up in the transport duct. The sampling tube inside the transport duct is provided with a channellike inlet and on the outside with a gear ring for rotary motoric adjustment of opened part of the sampling tube in the flow of loose material into the position to take sampie or into closed position.
A shortcoming of the device with shiftable sampling tube is that mentioned device reaches by its opened end into the flow of loose material only in one place of the transport duct cross section and taken sample contains the components of the loose material which flow at this moment in this piece of the cross section. The sample contains also a relatively larger quantity of components flowing at the wall of the transport duct than in its central part. It is because the opened end of the sampling tube when moving in and out
is a considerably longer time in the zone at the wall of the transport duct than in the zone remote from mentioned wall.
Mentioned shortcoming is partly eliminated by another device with rotary sampling tube in which opened part of the sampling tube faces the flow of loose material by its whole surface for the same time, but again only in one place of the transport duct cross section and taken sample of loose material is again not satisfactory representative. The fact that the sampling tube is all the time inside the transport duct causes constant interference of the flow of air and of loose material between two samplings.
Brief summary of the invention
Mentioned shortcomings of known devices are eliminated by a device for taking samples of loose materials, particularly feeding mixtures, consisting of a cylindrical sampling shovel with an inlet opening being controlled in the direction of shifting in a sealed through chamber arranged in. a transport duct and back by a pneumatic cylinder according to the invention, the subject matter of which is that to sealed chamber is fixed a hollow sleeve of a sampling mechanism with in its interior shiftably located cylindrical cover rotatably located on a cylindrical sampling shovel, while in cylindrical jacket of hollow sleeve there is a rotatably located control ring which is in mesh on the one hand with a pinion of a controlling electric motor, on the other hand with cylindrical cover which is in its jacket provided with an inlet and outlet opening and said sampling shovel is provided with a bottom with center flange which is rotatably located on a piston rod of a pneumatic cylinder and which is provided with a radially directed guiding finger for shiftable location in a securing groove being formed longitudinally in internal surface of hollow sleeve.
It is also advantageous when the bottom of the hollow sleeve is provided with a couple of by 180° from each other located stop pins reaching into a cylindrical cavity between bottom of cylindrical cover and bottom of a hollow sleeve for a contact with guiding finger of sampling shovel which is in its bottom provided with a limiting pin reaching into a curved groove provided in bottom of cylindrical cover.
Further it is advantageous when hollow sleeve of sampling mechanism leads from a side perpendicularly into central part of a duct portion of a transport duct which is located rotatably between a couple of side fix parts of a duct portion, while it is provided with a gear ring being in mesh with a pinion of a driving electric motor which is fixed to a fix part of a duct portion.
It is also advantageous when fix part of duct portion is surrounded by a collecting collar formed by an internal cylindrical jacket and coaxial external cylindrical jacket mutually interconnected by a chute bottom inclined towards an outlet throat, while collecting collar is provided with an annular cover located slidably rotatably on upper edges of internal cylindrical jacket and external cylindrical jacket and with a connecting throat fixed to a delivery throat of a sampling mechanism. The advantage of the device according to the invention is that taken sample of a loose material is highly representative, because the device enables to take sample from an arbitrary place of the cross section, including from the whole cross section of the transport duct. Another edvantage is the possibility to use the same sampling device to take samples of different sizes and also according to the adjustment to take samples with certain maximum dimension of components of loose material. The device further
enables an undisturbed, continuous flow of loose material in the transport duct between two samplings.
Brief description of the drawings
The invention is illustrated by way of example in the drawings, where Fig.1 is a schematic front view of the device for taking samples, Fig.2 is a longitudinal axial section of the sampling mechanism in a front view along line II-II in Fig.3, Fig.3 is a transversal section of the sampling mechanism along line III-III in Fig.2, Fig.4 is a fro schematic view of the device with attached collecting collar, Fig.5 is a vertical axial section of the collecting collar in front view and Fig.6 is a ground plan of the collecting collar.
Description of preferred embodiment Device for taking samples contains a duct portion 1 -Fig 1- the ends of which are provided with fix parts 2,3 with flanges 4 for connection with adjacent parts 5,6 of transport duct. Central part of duct portion 1 forms a rotary located sealed chamber 7. and a sampling mechanism 9. is fixed perpendicularly to jacket 8 of said chamber 7. To jacket 8 is further fixed a gear ring 10 which is in mesh with a pinion 11 located fixedly on the shaft of a driving elec trie motor 12 which is fixed to fix part 2 of duct portion
Sampling mechanism 9 -Fig.2- consists of a two-part cylindrical hollow sleeve 13 located by its opened end in an opening 14 of jacket 8 of sealed chamber 7. while it is fixed to said jacket 8 for example by not shown screws. In hollow sleeve 13 there is a shiftably and rotatably located cylindrical cover 15 provided at its opened end at jacket 8 of sealed chamber 7 with inlet and outlet opening 16 of the same size and shape like inlet opening 17 in sampling sho-
vel 18. Sampling shovel 18 is located ro tatably in cylindrical cover 15 and consists of a hollow cylindrical body which is at jacket 8 of sealed chamber 7 closed by a fix cover 19 which forms a part of jacket 8 of sealed chamber 2 when sampling shovel 8 is in the position when no sample is being taken. The interior of sampling shovel 18 is provided with a fix partition 20 limiting the length of its effective space 21 to a value corresponding with the length of inlet openning 17. Sampling shovel 18 is provided with bottom 22 with central flange 23 by which the sampling shovel 18 is rotatably locatd on a piston rod 24 of a pneumatic cylinder 25 which is fixed to bottom 26 of hollow sleeve 13. Cylindrical cover 15 is by its bottom 27. located rotatβbly on central flange 23. Connection of piston rod 24 with flange 23 enabling free rotary motion of central flange 23 of sampling shovel 18 and at the same time its forward and backward motion performed by piston rod 24. is made for example by a shoulder 28 on piston rod 24 and nut 29 screwed on free end of piston rod 24 in blind hollow 30 in sampling shovel 18 being provided with a not shown assembly opening. To outer face of central flange 23 is fixed a guiding finger 31. which is arranged in a cylindrical hollow 32 between bottom 26 of hollow sleeve 13 and bottom 27 of cylindrical cover 15, where it can freely rotate together with central flange 23. Guiding finger 31 reaches by its free end into securing groove 33 made longitudinally in a part of hollow sleeve 13, while it corresponds with the length of maximum extension of piston rod 24. Bottom 27 of cylindrical cover 15 is provided with a curved groove 52 into which reaches a limiting pin 53 fixedly located in bottom 22 of sampling shovel 18, limiting pin 53 serves to limit maximum relative motion between cylindrical cover 15 and sampling shovel 18. In bottom 26 of hollow sleeve 13 there are two fix stop pins 54 and 55 which reach into cylindrical hollow 32 and are arranged on a pitch circle under the
angle of 180°. In central pert of the length of hollow sleeve 13 is arranged a control ring 34 which slidably penetrates the wall of hollow sleeve 13 and by an entraining lug 35 created on internal surface of control ring 34 and reaching into a guiding groove 36 it is connected with cylindrical cover 15 which is shiftably arranged in control ring 34. Control ring 34 is in mesh with pinion 37 fixedly located on output shaft 38 of controlling electric motor 39. Because the control ring 34 divides the hollow sleeve 13 into two parts, said two parts are provided on the outside of control ring 34 with connecting flanges 40 connected for example by not shown screws. Hollow sleeve 13 is at jacket 8 of sealed chamber 2 provided with outlet opening 41 of loose material communicating with inlet and outlet opening 16 of cylindrical cover 15 end with inlet opening 17 of sampling shovel 18. Delivery throat 42 of a not shown delivery duct is connected to outlet opening
Device for taking samples of loose materials can be pro vided with a collecting collar 43 -Fig.4- fixed to fix part 2 of duct portion 1. Collecting collar 43 -Fig.5- is formed by internal cylindrical jacket 44 and coaxially with it arranged external cylindrical jacket 45 which are mutually connected by a chute bottom 46 inclined towards the lowest point where the chute bottom 46 continues in outlet throat 48 to which is connected a not shown delivery duct. Internal space 49 of collecting collar 43 is closed from up by an annular cover 50 located slidably rotatably on upper edges of internal cylindrical jacket 44 and external cylindrical jacket 45. Between each of the jackets 44,45 and annular cover 50 there is arranged a not shown seal, for example a usual labyrinth packing. Annular cover 50 is fixedly connected with sampling mechanism 9
by connecting throat 51.
In case of necessity to take a sample of loose material flowing through transport duct, compressed air is supplied into pneumatic cylinder 25 from which piston rod 24 shifts out together with sampling shovel 18 and cylindrical cover 15, which are thus shifted from hollow sleeve 13 of sampling mechanism 9 into sealed chamber 7 and in it in the flow of loose material in the place of sealed chamber 7 cross section from which the sample is to be taken. When shifting sampling shovel 18 into mentioned operational position its inlet opening 17 points up, that is against the flow of loose material. Shifting with this position of inlet opening 17 is secured by guiding finger 31 which, except for the starting position of sampling shovel 18, reaches into securing groove 33 in hollow sleeve 13. During movement of sampling shovel 18 into operational position, inlet opening 17 is covered by cylindrical cover 15. After positioning of sampling shovel 18 with cylindrical cover 15 in previously selected operational position controlling electric motor 39 is set in operation and pinion 37 located on output shaft 38. of electric motor 39 starts rotary motion of control ring 34. Because the latter is by its lug 35 reaching into guiding groove 36 connected with cylindrical cover 15 their rotation in hollow sleeve 13 takes place and at the same time cylindrical cover 15 moves over external surface of sampling shovel 18 which remains stationary because its guiding finger 31 is in securing groove 33. Rotation of cylindrical cover 15 proceeds then independently for example until the moment of complete opening of inlet opening 17 what takes place when inlet and outlet opening 16 in cylindrical cover 15 gets in alignment with inlet opening 17 of sampling shovel 18. During independent rotary motion of cylindrical cover 15 a relative motion between curved groove 52 and limiting pin 53. takes place, in
opened position of inlet opening 17 mentioned curved groove 52 leans by one of its ends against limiting pin 5 3 . Speed of opening and time of opening of inlet opening 17 are advantageously controlled by a not shown computer.
After expiration of selected time of opening of inlet opening 17 during which the components of loose material enter into effective space 21 of sampling shovel 18 controlling electric motor 39 is set in operation again but in reverse sense and control ring 34 rotates backwards what causes closing of inlet opening 17 of sampling shovel 18 in the moment when the other end of curved groove 52 leans against limiting pin 53. Compressed air is then supplied in the other end of pneumatic cylinder 25 what causes backwards motion of piston rod 24 together with sampling shovel 18 and with cylindrical cover 15 until mentioned parts come into starting position in which guiding finger 31 gets out of mesh with securing groove 13 and enters said cylindrical cavity 32. By setting the controlling electric motor 39 in operation in original sense of rotation pinion 37 and control ring 34 cause rotation of cy lindrical cover 15 and due to mutual friction also entrainment of sampling shovel 18 with guiding finger 31. until the latter leans against stop pin 54 what happens after turning of sampling shovel 18 by 180° when inlet opening 17 of sampling shovel 1 8 is completely aligned with outlet opening 41 in hollow sleeve 13 of sampling mechanism 9.
Due to leaning of guiding finger 31 against stop pin 54 entrainment of sampling shovel 18 is stopped, while rotary motion of cylindrical cover 15 continues until its inlet and outlet opening 16 gets in alignment with inlet opening 1_7 and with outlet opening 41 when taken sample of loose material leaves effective space 21 in sampling shovel 18 and through delivery throat 42 it enters into a not shown delivery duct through which it is transported either by gravity or pneumatically directly or via for example a cyclone separator, homogenizer and dosing mechs-
nism to an analyzer. During mentioned indeipedent rotary motion of cylindrical cover 15 relative motion between curved groove 2 and limiting pin 53 takes place again until the first end of curved groove 52 leans against limiting pin 53.
Due to reverse motion of cylindrical cover 15 friction causes again entrainment of sampling shovel 18 until guiding finger 31 leans against further stop pin 54 whet stops entrainment of sampling shovel 18 and free end of guiding finger 31 gets in alignment with securing groove 33. Cylindrical cover 15 continues in its rotary motion during which said inlet opening is closed again, while the other end of curved groove 52 leans against limiting pin
53 Sampling mechanism 9 is thus reedy for further taking of a sample of loose material.
In case of a requirement for taking sample from various places of the cross section of sealed chamber 7, driving electric motor 12 is set in operation and electric motor 1 2 sets by its pinion 11 a gear ring 10 into rotary motion as well as central part of duct portion 1 located rotatably between fix parts 2 and 3 forming sealed chamber 2 with attached sampling mechanism J9.
According to the magnitude of the angle of rotation of mentioned sealed chamber 2, or continuous sampling during entire extent of rotation, which is not complete 360°, it is possible to use different mode of sampling and moreover it is possible to combine it with the depth of shifting sampling shovel 18 into sealed chamber 7. In case that the device is provided with collecting collar 43 -Fig.4- emptying of effective space 21 through
connecting throat 51 into internal space 49 onto chute bottom 46 takes place, over chute bottom 46 the sample of loose material slips to the lowest point, wherefrom it falls into outlet throat 48 and from here it is again either by gravity of pneumatically transported in final phase to an analyzer.
During rotation of sealed chamber 2 annular cover 50 rotates also and byits peripheral part it slides over upper edges of internal cylindrical jacket 44 and external cylindrical jacket 45.
The device according to the invention can be used to take samples of loose material, for example cement, feeding mixtures and similar materials, especially in the cases when it is necessary to obtain objectively representative sample.
Claims
1. Device for taking samples of loose materials,particularly feeding mixtures, containing a cylindrical samp- ling shovel with an inlet opening, being controlled in the direction of shifting in a sealed through chamber arranged in transport duct and back by a pneumatic cylinder, being characterized in that to sealed chember /7/ is fixed a hollow sleeve /13/ of a sampling mechanism /9/ with in its interior shiftably located cylindrieal cover /15/ rotatably located on cylindrical sampling shovel /18/, while in cylindrical jacket of hollow sleeve /13/ there is a rotatably located control ring /34/ which is in mesh on the one hand with pinion /37/ of controlling electric motor /39/, on the other hand with cylindrieoal cover / 15/ which is in its jacket provided with an inlet and outlet opening /16/ and said sampling shovel /18/ is provided with a bottom/22/ with central flange /23/ which is rotatably located on piston rod /24/ of pneumatic cylinder /25/ and which is provided with a radially directed guiding finger/31/ for shiftable location in securing groove /33/ being formed longitudinally in internal surface of hollow sleeve /13/.
2. Device according to claim 1, being characterized in
that bottom /26/ of hollow sleeve /13/ is provided with a couple of by 180° from each other spaced stop pins /54,55/ reaching into cylindrical cavity /32/ between bottom /27/ of cylindrical cover /15/ and bottom /26/ of hollow sleeve /13/ for a contact with guiding finger /31/ of sampling shovel /16/ which is in its bottom/22/ provided with limiti ng pin /53/ reaching into curved groove /52/ provided in the bottom /27/ of cylindrical cover /15/.
3. Device according to claim 1, being characterized in
that hollow sleeve /13/ of sampling mechanism /9/
leads from a side perpendicularly into central part of duct portion /1/ of transport duct which is located rotatably between a couple of side fix parts /2 and3 / of duct portion /1/, while it is provided with a gear ring /10/ being in mesh with pinion /11/ of driving electric motor /12/ which is fixed to fix part /2/ of duct portion /1/.
4. Device according to claim 1 , being characterized in
that fix part /3/ of duct portion /1/ is surrounded by collecting collar /43/ formed by internal cylindrical jacket /44/ and by a coaxial external cylindrical jacket /45/ mutually interconnected by a chute bottom /46/ inclined towards outlet throat /48/, while collecting collar /43/ is provided with annular cover /50/ located slidably rotatably on upper edges of internal cylindrical jacket /44/ and external cylindrical jacket /45/ and with connecting throat /51/ fixed to delivery throat /42/ of sampling mechanism /9/.
AMENDED CLAIMS
[received by the International Bureau on 9 June 1992 (09.06.92); original claims 1-4 replaced by amended claims 1-3 (2 pages)]
1. Device for taking samples of loose materials, particularly feeting mixtures, containing a cylindrical sampling shovel rotatably located in cylindrical cover which is shiftably located in a hollow sleeve of a sampling mechanism fixed to a sealed chamber arranged in the transport duct, while the sampling shovel is with its bottom rotatably fixed to a piston rod of a pneumatic cylinder, being characterized in that the sampling shovel (18) is provided with a radially directed quiding finger (31) for shiftable location in the securing groove (33) extending longitudinelly in the internal surface of the hollow sleeve (13), the bottom (26) of which is provided with a couple of stop pins (54, 55) spaced by 180 ° from each other and reaching into the cylindrical cavity (32) between the bottom (27) of the cylindrical cover (15) and the bottom (26) of the hollow sleeve (13) for the contact with the guiding finger (31) of the sampling shovel (18), which is in its bottom (22) provided with the limiting pin (53) reaching into the curved groove (52) provided in the bottom (27) of the cylindrical cover (15).
2. Device according to claim 1, being characterized in that hollow sleeve (13) of sampling mechanism
(9) leads from a side perpendicularly into central part of duct portion (1) of transport duct which is located rotatably between a couple of side fix parts (2 and 3) of duct postion (1), while it is provided with a gear ring (10) being in mesh with pinion (11) of driving electric motor (12) which is fixed to fix part (2) of duct portion (1).
3. Device according to claim 1, being characterized in that fix part (3) of duct portion (1) is surrounded by collecting collar (43) formed by internal cylindrical jacket (44) and by a coaxial external cylindrical jacket (45) mutually interconnected by a chute bottom (46) inclined towards outlet throat (48), while collecting collar (43) is provided with annular cover (50) located slidably rotatably on upper edges of internal cylindrical jacket (44) and external cylindrical jacket (45) and with connecting throat (51) fixed to delivery throat (42) of sampling mechanism (9).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS906986A CS698690A3 (en) | 1990-12-29 | 1990-12-29 | Withdrawing head for loose materials sampling |
| CSPV6986-90 | 1990-12-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1992012409A1 true WO1992012409A1 (en) | 1992-07-23 |
Family
ID=5418142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CS1991/000003 Ceased WO1992012409A1 (en) | 1990-12-29 | 1991-12-20 | Device for taking samples of loose materials, particularly feeding mixtures |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU9118991A (en) |
| CS (1) | CS698690A3 (en) |
| WO (1) | WO1992012409A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113740099A (en) * | 2021-09-03 | 2021-12-03 | 中国科学院空间应用工程与技术中心 | While-drilling lateral sampling mechanism based on curved surface unfolding mechanism |
| CN114018641A (en) * | 2021-11-03 | 2022-02-08 | 山东省农业科学院畜牧兽医研究所 | Sampling device for measuring feed moisture |
| CN114371031A (en) * | 2021-12-21 | 2022-04-19 | 江苏德邦多菱健康科技有限公司 | Tricalcium phosphate fluency initial detection device and method capable of sampling at multiple points |
| CN118857842A (en) * | 2024-09-26 | 2024-10-29 | 北京中煤煤炭洗选技术有限公司 | Coal preparation sampling device and use method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115372078B (en) * | 2022-08-06 | 2024-12-27 | 山东万邦石油科技股份有限公司 | Sampler for bulk cargo conveying system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3659461A (en) * | 1970-06-18 | 1972-05-02 | Great Northern Nekoosa Corp | Line sampling device |
| US4024765A (en) * | 1973-11-29 | 1977-05-24 | Jean Abonnenc | Automatic volumetric device for taking samples of granular or powdered material |
| US4433587A (en) * | 1983-01-17 | 1984-02-28 | Gustafson, Inc. | Sampler for flowing pressurized dry material |
| US4702114A (en) * | 1984-05-07 | 1987-10-27 | Omya S.A. | Device for withdrawing and conditioning samples of materials in solid, liquid or gaseous form, for the purpose of analysis thereof |
-
1990
- 1990-12-29 CS CS906986A patent/CS698690A3/en unknown
-
1991
- 1991-12-20 AU AU91189/91A patent/AU9118991A/en not_active Abandoned
- 1991-12-20 WO PCT/CS1991/000003 patent/WO1992012409A1/en not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3659461A (en) * | 1970-06-18 | 1972-05-02 | Great Northern Nekoosa Corp | Line sampling device |
| US4024765A (en) * | 1973-11-29 | 1977-05-24 | Jean Abonnenc | Automatic volumetric device for taking samples of granular or powdered material |
| US4433587A (en) * | 1983-01-17 | 1984-02-28 | Gustafson, Inc. | Sampler for flowing pressurized dry material |
| US4702114A (en) * | 1984-05-07 | 1987-10-27 | Omya S.A. | Device for withdrawing and conditioning samples of materials in solid, liquid or gaseous form, for the purpose of analysis thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113740099A (en) * | 2021-09-03 | 2021-12-03 | 中国科学院空间应用工程与技术中心 | While-drilling lateral sampling mechanism based on curved surface unfolding mechanism |
| CN114018641A (en) * | 2021-11-03 | 2022-02-08 | 山东省农业科学院畜牧兽医研究所 | Sampling device for measuring feed moisture |
| CN114018641B (en) * | 2021-11-03 | 2023-10-13 | 山东省农业科学院畜牧兽医研究所 | Sampling device for feed moisture measurement |
| CN114371031A (en) * | 2021-12-21 | 2022-04-19 | 江苏德邦多菱健康科技有限公司 | Tricalcium phosphate fluency initial detection device and method capable of sampling at multiple points |
| CN114371031B (en) * | 2021-12-21 | 2022-10-28 | 江苏德邦多菱健康科技有限公司 | Tricalcium phosphate fluency initial detection device and method capable of sampling at multiple points |
| CN118857842A (en) * | 2024-09-26 | 2024-10-29 | 北京中煤煤炭洗选技术有限公司 | Coal preparation sampling device and use method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| AU9118991A (en) | 1992-08-17 |
| CS698690A3 (en) | 1992-07-15 |
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