CN109520883B - Coal sampler - Google Patents
Coal sampler Download PDFInfo
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- CN109520883B CN109520883B CN201811469605.XA CN201811469605A CN109520883B CN 109520883 B CN109520883 B CN 109520883B CN 201811469605 A CN201811469605 A CN 201811469605A CN 109520883 B CN109520883 B CN 109520883B
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- 239000003245 coal Substances 0.000 title claims abstract description 139
- 230000007246 mechanism Effects 0.000 claims abstract description 209
- 238000005303 weighing Methods 0.000 claims abstract description 45
- 238000005070 sampling Methods 0.000 claims abstract description 36
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 230000007306 turnover Effects 0.000 claims description 35
- 230000005540 biological transmission Effects 0.000 claims description 13
- 238000011049 filling Methods 0.000 claims description 9
- 230000007423 decrease Effects 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 230000001276 controlling effect Effects 0.000 description 10
- 230000000903 blocking effect Effects 0.000 description 6
- 230000000875 corresponding effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 238000007689 inspection Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 238000001035 drying Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
- G01N5/045—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder for determining moisture content
-
- 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
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a coal sampler, relates to the technical field of coal sampling equipment, and mainly aims to improve the accuracy of detecting the water content of a coal sample. The main technical scheme of the invention is as follows: the coal sampler comprises a frame, wherein a turning arm is rotatably arranged on the frame, and a sample adding mechanism and a first container which is communicated with an inlet of the sample adding mechanism and is used for containing a coal sample are arranged on the turning arm; the weighing mechanism is arranged on the rack, a second container is placed on the weighing mechanism, and the weighing mechanism is used for weighing the weight value of the coal sample in the second container; the first driving mechanism is connected with the overturning arm and used for driving the overturning arm to overturn so as to enable the first container to be inverted, and the outlet of the sample adding mechanism is opposite to the inlet of the second container; the first detection mechanism is used for detecting first state information of whether the overturning arm overturns or not; and the controller is respectively connected with the sample adding mechanism, the first detection mechanism and the weighing mechanism. The invention is mainly used for sampling and weighing coal.
Description
Technical Field
The invention relates to the technical field of coal sampling equipment, in particular to a coal sampler.
Background
Currently, the coal-related industries such as power plants, coal-making plants, steel plants, and the like generally settle accounts for the weight of the coal after moisture removal, so that the water content of the batch of coal becomes an important factor affecting the price of the coal, and therefore, the water content of the coal needs to be checked before the coal is settled.
In the prior art, a drying method is generally adopted to test the water content of coal, the method comprises sampling and weighing of the coal, specifically, the coal sample is manually filled into a vessel and weighed, and meanwhile, data are manually recorded, however, errors are easily generated because the coal sample is manually filled, weighed and recorded in the process, and thus, the test accuracy of the water content of the coal sample is lower.
Disclosure of Invention
In view of the above, the embodiment of the invention provides a coal sampler, which mainly aims to improve the accuracy of detecting the water content of a coal sample.
In order to achieve the above purpose, the present invention mainly provides the following technical solutions:
the embodiment of the invention provides a coal sampler, which comprises the following steps:
the device comprises a frame, wherein a turning arm is rotatably arranged on the frame, and a sample adding mechanism and a first container which is communicated with an inlet of the sample adding mechanism and is used for containing a coal sample are arranged on the turning arm;
the weighing mechanism is arranged on the rack, a second container is placed on the weighing mechanism, and the weighing mechanism is used for weighing the weight value of the coal sample in the second container;
the first driving mechanism is connected with the overturning arm and used for driving the overturning arm to overturn so as to enable the first container to be inverted, and the outlet of the sample adding mechanism is opposite to the inlet of the second container; and
the first detection mechanism is used for detecting first state information of whether the overturning arm overturns or not; and
the controller is respectively connected with the sample adding mechanism, the first detecting mechanism and the weighing mechanism and is used for receiving the first state information and controlling the sample adding mechanism to add the coal sample in the first container to the second container when the first state information is that the overturning arm overturns, and the controller is also used for receiving the weight value and controlling the sample adding mechanism to stop filling when the weight value is equal to a preset value.
Specifically, the sampling mechanism includes:
a receiving chamber having an inlet and an outlet, the inlet of the receiving chamber communicating with the outlet of the first container;
the first pushing rod is arranged in the accommodating chamber, and is provided with a first spiral blade which is arranged spirally along the length direction of the first pushing rod, one end of the first spiral blade is opposite to the inlet of the accommodating chamber, and the other end of the first spiral blade is opposite to the outlet of the accommodating chamber; and
the second driving mechanism is respectively connected with the controller and the first pushing rod and is used for driving the first pushing rod to rotate or stop driving along a first direction according to a control instruction of the controller so as to push out the coal sample in the accommodating chamber.
Specifically, the sampling mechanism further includes:
the second pushing rod is arranged in the accommodating chamber and is parallel to the first pushing rod, second spiral blades which are spirally arranged along the length direction of the second pushing rod are arranged on the second pushing rod, and the second spiral blades and the first spiral blades are mutually staggered;
the input end of the transmission mechanism is connected with the second driving mechanism, and the output end of the transmission mechanism is connected with the second pushing rod;
the second driving mechanism drives the second pushing rod to rotate through the transmission mechanism.
Specifically, a baffle is slidably arranged at the outlet of the sample adding mechanism;
the coal sampler further comprises:
the third driving mechanism is respectively connected with the controller and the baffle plate and is used for driving the baffle plate to close or open the outlet of the accommodating chamber;
the controller is further used for judging that when the first state information is that the overturning arm overturns, the third driving mechanism is controlled to drive the baffle to open the outlet of the accommodating chamber;
the controller is also used for judging that when the weight value is equal to a preset value, the third driving mechanism is controlled to drive the baffle to close the outlet of the accommodating chamber.
Further, the coal sampler further comprises:
the fourth driving mechanism is arranged on the overturning arm, a supporting piece is arranged at the output end of the fourth driving mechanism, the first container is supported on the supporting piece, and the fourth driving mechanism is used for driving the first container to move so that the first container is clamped between the supporting piece and the inlet of the sampling mechanism;
the second detection mechanism is connected with the controller and is used for detecting whether the bearing piece moves to a preset position or not, so that the first container is clamped between the bearing piece and the inlet of the accommodating chamber, and second state information is obtained;
the first driving mechanism is connected with the controller, and the controller is further used for receiving the second state information and controlling the first driving mechanism to drive the overturning arm to overturn when judging that the second state information is that the bearing piece moves to a preset position.
Further, the coal sampler further comprises:
the third detection mechanism is connected with the controller and is used for detecting whether the overturning arm is at an initial position or not and enabling the first container to be upright;
the controller is further configured to receive the third state information, and determine that when the third state information indicates that the turnover arm is at the initial position and the second state information indicates that the support moves to the preset position, control the first driving mechanism to drive the turnover arm to turn.
Specifically, a funnel is communicated with the inlet of the accommodating chamber, and the inlet of the accommodating chamber is communicated with the outlet of the first container through the funnel;
the two opposite sides of the funnel are respectively provided with a first air inlet and a second air inlet;
the outlet of the accommodating chamber is communicated with a conical tube body, the inner diameter of the tube body gradually decreases from the outlet of the accommodating chamber, the end part of the tube body is connected with a shield, and the shield can cover the weighing mechanism and the second container.
Specifically, the controller is further used for controlling the first driving mechanism to drive the overturning arm to overturn to an initial position after controlling the second driving mechanism to stop driving, and then controlling the second driving mechanism to drive the first pushing rod to rotate along a second direction so as to recycle the residual coal sample in the accommodating chamber to the first container;
the first direction is opposite to the second direction.
Specifically, the side wall of the accommodating chamber is provided with an air suction port and a third air inlet which are communicated with the inside of the accommodating chamber;
the coal sampler further comprises an exhaust fan and a gas tank which are respectively connected with the controller, wherein an inlet of the exhaust fan is communicated with the air suction port, and an outlet of the gas tank is communicated with the third air inlet;
the controller is also used for controlling the exhaust fan to form negative pressure in the accommodating chamber and controlling the air tank to charge air flow into the accommodating chamber after the negative pressure is formed.
Further, the coal sampler further comprises:
and the coal sample separator is communicated with the exhaust fan.
By means of the technical scheme, the coal sampler has at least the following beneficial effects:
according to the coal sampler provided by the embodiment of the invention, the turnover arm can be driven by the first driving mechanism to drive the sample adding mechanism and the first container to turn over, so that the first container is inverted, the outlet of the sample adding mechanism is opposite to the inlet of the second container on the weighing mechanism, the first detecting mechanism can detect the first state information of whether the turnover arm is turned over or not, the weighing mechanism can weigh the weight value of the coal sample in the second container, the controller can receive the first state information and can judge that the first state information is that the turnover arm is turned over, the sample adding mechanism is controlled to add the coal sample in the first container into the second container under the action of gravity, and meanwhile, the controller can also receive the weight value and can judge that the sample adding mechanism is controlled to stop adding the coal sample when the weight value is equal to the preset value, so that the coal sampler can automatically sample, fill and weigh the coal sample, the whole balance is not required to be manually intervened, the error is not easy to generate, the inspection accuracy of the water content of the coal sample is improved, and the inspection accuracy of the coal sample is ensured. Moreover, the turnover arm drives the first container to turn upside down, so that the coal sample can be filled into the second container along with the sampling mechanism under the action of gravity, and the coal sample to be assayed can be loosened in advance, so that the coal sample can enter the sampling mechanism to be filled more easily.
Drawings
FIG. 1 is a schematic diagram of a coal sampler according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the sample loading mechanism of FIG. 1;
FIG. 3 is a schematic view of the internal structure of the accommodating chamber in FIG. 2;
FIG. 4 is a schematic view of the structure of the invert arm of the coal sampler of FIG. 1 after inversion;
FIG. 5 is a schematic view of the first container of the coal sampler of FIG. 1 shown in an unsecured configuration;
fig. 6 is a block diagram of a control part of the coal sampler shown in fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings in the preferred embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the invention. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In the description of the present embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present embodiment and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of the present embodiment.
As shown in fig. 1, 4 and 6, an embodiment of the present invention provides a coal sampler, which comprises a frame 1, on which a turning arm 2 is rotatably arranged, the turning arm 2 is provided with a sampling mechanism 3 and a first container 4 which is communicated with an inlet of the sampling mechanism 3 and is used for holding a coal sample; the weighing mechanism 5 is arranged on the frame 1, a second container 51 is placed on the weighing mechanism, and the weighing mechanism 5 is used for weighing the weight value of the coal sample in the second container 51; a first driving mechanism 6 connected to the turning arm 2 for driving the turning arm 2 to turn upside down the first container 4, and the outlet of the sampling mechanism 3 is opposite to the inlet of the second container 51; a first detecting mechanism 7 for detecting first state information of whether the flipping arm 2 is flipped; and the controller 8 is respectively connected with the sampling mechanism 3, the first detection mechanism 7 and the weighing mechanism 5, and is used for receiving the first state information and judging that when the first state information is that the turnover arm 2 is turned over, the sampling mechanism 3 is controlled to fill the coal sample in the first container 4 into the second container 51, the controller 8 is also used for receiving the weight value, and when the weight value is equal to the preset value, the sampling mechanism 3 is controlled to stop filling.
In the coal sampler, a frame 1 may include a platform 11 and a bracket 12 disposed on the platform 11, a turnover arm 2 may be L-shaped, one end of the turnover arm 2 may be rotatably connected to the bracket 12 through a rotation shaft, a first container 4 and a sampling mechanism 3 may be disposed at the other end of the turnover arm 2, such that the two are located at one side of the bracket 12, and the first container 4 is located below the sampling mechanism 3, a first driving mechanism 6 may be a servo motor disposed on the platform 11, an output shaft of the servo motor may be connected to one end of the rotation shaft to drive the turnover arm 2 to turn over relative to the bracket 12, and the servo motor may be connected to the rotation shaft through a transmission for adjusting a turning speed of the turnover arm 2; the weighing mechanism 5 may be an electronic balance, the platform 11 may be provided with a through hole which is adapted to the outline shape of the electronic balance and is located at the other side of the bracket 12, so that the electronic balance may be disposed below the platform 11 and exposed on the surface of the platform 11 through the through hole, and the second container 51 may be placed on the electronic balance, where the position of the through hole should be kept opposite to the outlet of the overturned sampling mechanism 3; the first detecting mechanism 7 may have various structural forms, as long as it can detect the state information about whether the turnover arm 2 has been turned in place and send the state information to the controller 8, for example, the first detecting mechanism 7 may include a photoelectric sensor 71 disposed on the bracket 12 and a blocking sheet disposed on the turnover arm 2 for blocking the light signal sent by the photoelectric sensor, that is, when the turnover arm 2 is turned in place, the blocking sheet just blocks the light sent by the photoelectric sensor 71, so that the photoelectric sensor 71 sends a control signal to the controller 8; of course, the first detecting mechanism 7 may be implemented by other structures such as a position sensor, which is not limited herein; the controller 8 may be a programmable controller 8, which may control the sampling mechanism 3 to perform corresponding actions according to the control signal sent by the first detection mechanism 7 and the weight value sent by the weighing mechanism 5.
Specifically, when sampling and weighing are performed, the first driving mechanism 6 may drive the turning arm 2 to turn over, at this time, the first detecting mechanism 7 may detect whether the turning arm 2 turns over in place, until the turning arm 2 turns over in place, that is, when the first container 4 is inverted, the sampling mechanism 3 is located below the first container 4 and the outlet of the sampling mechanism is opposite to the second container 51, a control signal is sent to the controller 8, after the controller 8 receives the control signal, the controller 8 controls the sampling mechanism 3 to operate, so that the coal sample in the first container 4 is filled into the second container 51, so that the coal sample in the second container 51 is gradually increased and weighed in real time by the weighing mechanism 5, and when the controller 8 determines that the value of the coal sample in the second container 51 reaches a preset value, the sampling mechanism 3 is controlled to stop filling, so that an operator can put the second container 51 into the drying box to dry after the process of automatic sampling, filling and weighing of the coal sample is completed.
According to the coal sampler provided by the embodiment of the invention, the turnover arm can be driven by the first driving mechanism to drive the sample adding mechanism and the first container to turn over, so that the first container is inverted, the outlet of the sample adding mechanism is opposite to the inlet of the second container on the weighing mechanism, the first detecting mechanism can detect the first state information of whether the turnover arm is turned over or not, the weighing mechanism can weigh the weight value of the coal sample in the second container, the controller can receive the first state information and can judge that the first state information is that the turnover arm is turned over, the sample adding mechanism is controlled to add the coal sample in the first container into the second container under the action of gravity, and meanwhile, the controller can also receive the weight value and can judge that the sample adding mechanism is controlled to stop adding the coal sample when the weight value is equal to the preset value, so that the coal sampler can automatically sample, fill and weigh the coal sample, the whole balance is not required to be manually intervened, the error is not easy to generate, the inspection accuracy of the water content of the coal sample is improved, and the inspection accuracy of the coal sample is ensured. Moreover, the turnover arm drives the first container to turn upside down, so that the coal sample can be filled into the second container along with the sampling mechanism under the action of gravity, and the coal sample to be assayed can be loosened in advance, so that the coal sample can enter the sampling mechanism to be filled more easily.
The structure of the sample adding mechanism 3 may be various, as long as the sample adding mechanism can fill the coal sample in the first container 4 into the second container 51 after the overturning arm 2 overturns, and in order to make the structure of the sample adding mechanism 3 simpler and easy to operate, referring to fig. 2 and referring to fig. 1, the sample adding mechanism 3 may include a containing chamber 31, the containing chamber 31 has an inlet and an outlet, and the inlet of the containing chamber 31 is communicated with the outlet of the first container 4; a first push rod 32 disposed in the accommodating chamber 31 and provided with a first screw blade 321 spirally arranged along a length direction thereof, one end of the first screw blade 321 being opposite to an inlet of the accommodating chamber 31 and the other end being opposite to an outlet of the accommodating chamber 31; and a second driving mechanism 33 connected with the controller 8 and the first pushing rod 32 respectively, for driving the first pushing rod 32 to rotate or stop driving along the first direction according to the control instruction of the controller 8 so as to push out the coal sample in the accommodating chamber 31. Specifically, the inlet and outlet of the accommodating chamber 31 may be located at the upper and lower sides of the accommodating chamber 31 and at both ends thereof, respectively; the second driving mechanism 33 may be a motor, and an output shaft thereof is connected to an end of the first pushing rod 32; the first pushing rod 32 can be fixed in the accommodating chamber 31 through a bearing, and two ends of the first spiral sheet are opposite to the inlet and the outlet of the accommodating chamber 31 respectively, so that when the controller 8 controls the second driving mechanism 33 to drive the first pushing rod 32 to rotate, the first spiral blade 321 can rotate along with the first pushing rod 32, and therefore a coal sample falling into the accommodating chamber 31 can flow out from the inlet to the outlet of the accommodating chamber 31 under the spiral pushing of the first spiral blade 321. That is, when the controller 8 receives the control signal sent by the first detecting mechanism 7, that is, controls the second driving mechanism 33 to drive the first pushing rod 32 to rotate, so that the first spiral blade 321 is used to fill the coal sample in the first container 4 into the second container 51, the structure is simple, the operation is easy, and the controller 8 can control the driving mechanism to drive the first pushing rod 32 to rotate according to a preset rule, for example, when the controller 8 determines that the weight of the coal sample in the second container 51 is about to reach the preset value, the driving speed of the second driving mechanism 33 can be reduced, so as to further ensure the accuracy of weighing the coal sample. Of course, the sample loading mechanism 3 is not limited to the above-described structure, and may further include a receiving chamber, a conveying device disposed in the receiving chamber, and a plurality of pushing teeth disposed on the conveying device, wherein the pushing teeth may assist in pushing the coal sample, and the conveying device may be connected to the controller 8, so that the conveying device may perform transmission under the control of the controller 8, so as to convey the coal sample to the inlet of the receiving chamber 31.
If the water content of the coal sample is large, the coal sample is easy to be adhered into a block shape due to the large viscosity, and the block-shaped coal sample is easy to block the accommodating chamber 31, so that the sampling mechanism 3 cannot work, in order to solve the problem, referring to fig. 2 and 3, and referring to fig. 1, the sampling mechanism 3 can further comprise a second pushing rod 34, the second pushing rod 34 is arranged in the accommodating chamber 31 and parallel to the first pushing rod 32, the second pushing rod 34 is provided with second spiral blades 341 spirally arranged along the length direction of the second pushing rod, and the second spiral blades 341 and the first spiral blades 321 are mutually staggered; the input end of the transmission mechanism is connected with the second driving mechanism 33, and the output end of the transmission mechanism is connected with the second pushing rod 34; the second driving mechanism 33 drives the second push rod 34 to rotate through a transmission mechanism. Through setting up second catch bar 34 and second helical blade 341, and second catch bar 34 can also be fixed in holding room 31 through the bearing, and second helical blade 341 and first helical blade 321 staggered arrangement, namely every tooth of second helical blade 341 is located between two adjacent teeth of first helical blade 321 and is close to first catch bar 32, every tooth of first helical blade 321 is located between two adjacent teeth of second helical blade 341, make first helical blade 321 or second helical blade 341 can smash the cubic coal sample that is located between two adjacent teeth of opposite side at rotatory in-process, thereby make the coal sample can be withdrawed from holding room 31 smoothly, and then effectively prevented holding room 31 from blockking up, guaranteed the normal work of mechanism 3. The second driving mechanism 33 drives the second pushing rod 34 to rotate through a transmission mechanism, specifically, in order to make the structure of the sampling mechanism 3 simpler, the transmission mechanism may include a driving gear 35 and a driven gear 36, where the driving gear 35 may be fixed on the first pushing rod 32 by a snap spring 37, the driven gear 36 may be fixed on the second pushing rod 34 by another snap spring 37, and the two may be engaged and connected, so that the first pushing rod 32 and the second pushing rod 34 relatively rotate, as in the directions a and b in fig. 3, of course, a gear adding manner may also be adopted, so that the first pushing rod 32 and the second pushing rod 34 rotate in the same direction, which is not limited herein. Further, the number of the second pushing rods 34 may be plural, so that the function of preventing the clogging of the accommodating chamber 31 can be better performed.
Further, referring to fig. 4 and 6 in combination with fig. 1, the outlet of the sampling mechanism 3 may be slidably provided with a baffle 28, that is, the baffle 28 may be slidably provided at the outlet of the accommodating chamber 31, and specific reference may be made to the structure of the gate valve; and the coal sampler may further comprise a third driving mechanism 39, wherein the third driving mechanism 39 is respectively connected with the controller 8 and the baffle 28 and is used for driving the baffle 28 to close or open the outlet of the accommodating chamber 31; the controller 8 may be further configured to control the third driving mechanism 39 to drive the shutter 28 to open the outlet of the accommodating chamber 31 when the first status information indicates that the flipping arm 2 has flipped; and the controller 8 may be further configured to control the third driving mechanism 39 to drive the baffle 28 to close the outlet of the accommodating chamber 31 when the weight value is equal to the preset value. By providing the baffle 28, it is possible to prevent the coal sample in the housing chamber 31 from flowing out through the outlet after the completion of the filling or before the start of the filling, thereby affecting the weighing result. Specifically, the third driving mechanism 39 may include a cylinder and a solenoid valve in communication with the cylinder, and the solenoid valve may be connected to the controller 8. That is, when the controller 8 receives the control signal sent by the first detecting mechanism 7 and indicating that the turning arm 2 has turned in place, the electromagnetic valve can be controlled to be opened, so that the air cylinder drives the baffle 28 to open the outlet of the accommodating chamber 31, and then the sample adding mechanism 3 is controlled to operate, and when the sample adding is finished, that is, when the controller 8 determines that the weight value of the weight information sent by the weighing mechanism 5 is equal to the preset value, the electromagnetic valve can be controlled to be closed, so that the air cylinder is deflated, so that the baffle 28 seals the outlet of the accommodating chamber 31, and the weighing accuracy of the weighing mechanism 5 is further ensured.
Further, referring to fig. 1, 5 and 6, the coal sampler further includes a fourth driving mechanism 9, the fourth driving mechanism 9 is disposed on the turning arm 2, the output end of the fourth driving mechanism is provided with a supporting member 91, the first container 4 is supported on the supporting member 91, the fourth driving mechanism 9 is used for driving the first container 4 to move, so that the first container 4 is clamped between the supporting member 91 and the inlet of the sampler 3, that is, the first container 4 is clamped between the supporting member 91 and the inlet of the accommodating chamber 31, so that the first container 4 is communicated with the accommodating chamber 31; a second detecting mechanism 10, connected to the controller 8, for detecting whether the supporting member 91 moves to a preset position, so that the first container 4 is clamped between the supporting member 91 and the inlet of the accommodating chamber 31; the first driving mechanism 6 is connected to the controller 8, and the controller 8 is further configured to receive the second status information, and determine that when the second status information is that the support 91 moves to the preset position, control the first driving mechanism 6 to drive the turning arm 2 to turn. After the first container 4 containing the assay is placed on the supporting member 91, the fourth driving mechanism 9 can drive the first container 4 to move upwards until the position of the supporting member 91 reaches the preset position, so that when the first container 4 is clamped and fixed between the inlet of the accommodating chamber 31 and the supporting member 91, the second detecting mechanism 10 sends a control signal to the controller 8, and the controller 8 controls the first driving mechanism 6 to drive the turnover arm 2 to turn according to the control signal, that is, only after the position of the first container 4 is fixed and stabilized, the controller 8 controls the turnover arm 2 to turn, thereby effectively preventing the coal sample from being scattered due to the fact that the first container 4 is not placed and stabilized and the turnover arm 2 turns. Wherein, the fourth driving mechanism 9 may be an air cylinder, the first container 4 may be a cylindrical bottle, and the supporting member 91 may include a supporting plate disposed at an end of a piston rod of the air cylinder and an annular collar disposed on the supporting plate, and the size and shape of the collar is adapted to the size and shape of the first container 4, so that the bottom end of the first container 4 may be inserted into the collar and supported on the supporting plate. The second detecting mechanism 10 may have various structural forms, as long as the structural form can detect the position information of the supporting member 91 and send the position information to the controller 8, for example, the second detecting mechanism 10 may include a magnetic member and a hall sensor matched with the magnetic member, the magnetic member may be disposed at a position of the supporting member 91 on a piston rod of the cylinder, the hall sensor may be disposed at the preset position, the preset position may be a position of the supporting member 91 capable of clamping the first container 4 between the supporting member and an inlet of the accommodating chamber 31, when the piston rod of the cylinder drives the magnetic member to move upwards to the preset position, that is, the hall sensor may send a control signal to the controller 8, then the controller 8 may indicate that the first container 4 is clamped between the supporting member 91 and the inlet of the accommodating chamber 31, and the controller 8 may control the first driving mechanism 6 to drive the turning arm 2 to turn according to the control signal. Of course, the second detecting mechanism 10 may be implemented by other structures such as a position sensor, which is not limited herein.
Further, referring to fig. 1 and 6, the coal sampler further includes a third detecting mechanism 13, where the third detecting mechanism 13 is connected to the controller 8 and is used to detect whether the turning arm 2 is in the initial position, and third status information that makes the first container 4 stand upright; the controller 8 is further configured to receive the third status information, and determine that when the third status information indicates that the turning arm 2 is at the initial position and the second status information indicates that the supporting member 91 moves to the preset position, control the first driving mechanism 6 to drive the turning arm 2 to turn. The third detecting mechanism 13 may have various structural forms, as long as it can detect whether the turnover arm 2 is at the initial position and send the state information to the controller 8, for example, the third detecting mechanism 13 may include a photoelectric sensor 131 disposed on the support 12 and a blocking piece 132 disposed on the turnover arm 2 for blocking the light signal sent by the photoelectric sensor 131, that is, when the turnover arm 2 is at the initial position, the blocking piece 132 just blocks the light sent by the photoelectric sensor 131, so that the photoelectric sensor 131 sends the corresponding control signal to the controller 8, and meanwhile, the support 91 moves to the preset position, so that the hall sensor sends the corresponding control signal to the controller 8, so that the controller 8 can control the first driving mechanism 6 to drive the turnover arm 2 to turn according to the corresponding control signals sent by the photoelectric sensor 131 and the hall sensor, that is, only when the turnover arm 2 is at the initial position, the first container 4 is standing, and after the first container 4 is fixed, the controller 8 controls the turnover arm 2 to turn over, so that the first container 4 is better prevented from falling off the coal. Of course, the first detecting mechanism 7 may be implemented by other structures such as a position sensor, which is not limited herein.
In order to facilitate the coal sample in the first container 4 to fall into the accommodating chamber 31 more smoothly after the overturning arm 2 is overturned, referring to fig. 1 and 4, a funnel 310 may be connected to the inlet of the accommodating chamber 31, so that the inlet of the accommodating chamber 31 is connected to the outlet of the first container 4 through the funnel 310. The inclination angle of the tapered portion of the hopper 310 may be designed according to the viscosity of the coal sample. In addition, in order to prevent the coal sample from being stuck in the funnel 310, a first air inlet 311 and a second air inlet 312 may be respectively provided at opposite sides of the funnel 310, and in particular, when the method is implemented, air flows may be alternately filled into the funnel 310 through the first air inlet 311 and the second air inlet 312 from opposite directions, so that air vibration is generated in the funnel 310, and thus the coal sample stuck in the funnel 310 may smoothly enter the accommodating chamber 31, and further the sample filling mechanism 3 may smoothly fill the coal sample into the second container 51. In addition, in order to make the coal sample smoothly flow out to the second container 51 and prevent the weighing mechanism 5 from being influenced by external factors when accurately weighing the coal sample in the second container 51, the conical pipe body 313 can be communicated at the outlet of the accommodating chamber 31, and the inner diameter of the pipe body 313 is gradually reduced from the outlet of the accommodating chamber 31, so that the pipe body 313 can play a better guiding role on the flowing out of the coal sample, so that the coal sample can flow out conveniently; the end part of the pipe body 313 can be connected with the protective cover 314, the protective cover 314 can cover the weighing mechanism 5 and the second container 51, and after the overturning arm 2 overturns, the protective cover 314 can cover the weighing mechanism 5 and the second container 51, so that the influence of external factors on the weighing accuracy of the weighing mechanism 5 is effectively prevented.
Specifically, referring to fig. 1, 2 and 3, the controller 8 is further configured to control the second driving mechanism 33 to stop driving, control the first driving mechanism 6 to drive the turning arm 2 to turn to the initial position, and control the second driving mechanism 33 to drive the first pushing rod 32 to rotate along the second direction, so as to recycle the residual coal sample in the accommodating chamber 31 to the first container 4; the first direction and the second direction are opposite. When the controller 8 controls the sampling mechanism 3 to stop filling, i.e. controls the second driving mechanism 33 to stop driving, the controller 8 can control the first driving mechanism 6 to drive the turning arm 2 to turn to the initial position, so that the sampling mechanism 3 is positioned above the first container 4, the first container 4 is upright, and then control the second driving mechanism 33 to drive the first pushing rod 32 to rotate along the direction opposite to the first direction, so that the residual coal sample in the accommodating chamber 31 can be moved from the outlet end to the inlet end of the accommodating chamber 31 under the reverse spiral pushing of the first spiral blade 321 until the residual coal sample flows into the first container 4, thereby realizing recovery of the residual coal sample and avoiding waste of the coal sample.
Specifically, referring to fig. 1 and 2, an air suction port 315 and a third air intake port 316 communicating with the inside thereof may also be provided on the side wall of the accommodating chamber 31; the coal sampler may further include an exhaust fan 14 and a gas tank 15 containing high-pressure gas, which are respectively connected to the controller 8, wherein an inlet of the exhaust fan 14 is communicated with the air suction port 315, and an outlet of the gas tank 15 is communicated with the third air inlet 316; wherein, the controller 8 can be connected with the high-pressure gas tank 15 through an electromagnetic valve; the controller 8 is also used for controlling the suction fan 14 to form negative pressure in the accommodating chamber 31 and controlling the gas tank 15 to charge high-pressure air flow into the accommodating chamber 31 after the negative pressure is formed. Through the arrangement of the exhaust fan 14 and the air tank 15 filled with high-pressure air, after the recovery of the residual coal sample in the accommodating chamber 31 is finished, in order to further clean the residual coal sample in the accommodating chamber 31 and avoid mutual pollution among different batches of coal samples, the controller 8 can control the exhaust fan 14 to be started, the exhaust fan 14 forms negative pressure in the accommodating chamber 31 through the air suction port 315, then the controller 8 can also control the electromagnetic valve to be started, the high-pressure air tank 15 is filled with high-pressure air flow into the accommodating chamber 31 through the third air inlet 316, so that the residual coal sample in the accommodating chamber 31 flows away along with the negative pressure, the accommodating chamber 31 is cleaned, no residual coal sample exists in the accommodating chamber 31 of the sample adding mechanism 3 after each sampling and weighing, and mutual pollution among different batches of coal samples is effectively avoided. The controller 8 may determine whether the recovery of the residual coal sample in the accommodating chamber 31 is completed by recording the number of turns of the reverse rotation of the first push rod 32, that is, when the controller 8 determines that the number of turns of the reverse rotation of the first push rod 32 reaches a preset number of turns, the air exhauster 14 may be controlled to be started, after the air exhauster 14 is started for a preset time, the electromagnetic valve may be controlled to be opened, so that the high-pressure air tank 15 fills the accommodating chamber 31 with high-pressure air flow, and of course, the preset number of turns is understood as that when the first push rod 32 reversely rotates to the preset number of turns, the recovery of the residual coal sample in the accommodating chamber 31 is completed; the predetermined time is understood to be when the suction fan 14 is operated for the predetermined time, and the negative pressure is formed in the accommodating chamber 31.
Specifically, referring to fig. 3, the number of the third air inlets 316 may be plural, the plurality of third air inlets 316 may be uniformly distributed on both sides of the accommodating chamber 31, and each third air inlet 316 may correspond to a position between adjacent teeth of the first spiral blade 321 or the second spiral blade 341, so that the high-pressure air flow entering through each third air inlet 316 may flush the surface of the corresponding spiral blade, meanwhile, the number of electromagnetic valves connected to the air tank 15 may be plural, or a multi-position multi-electromagnetic valve may be selected to control opening or closing of the corresponding third air inlet 316, so that the controller 8 may alternately open each third air inlet 316 according to a certain direction through control of the electromagnetic valve, so that the air tank 15 may alternately charge the high-pressure air flow into the accommodating chamber 31 through the alternately opened third air inlet 316, so that air oscillation may be formed in the accommodating chamber 31, and the coal sample adhered in the accommodating chamber 31 may fall off and flow along with the negative pressure direction, and of course, a collection container may be provided in communication with the accommodating chamber 31, so that the residual coal sample may be sucked into the accommodating chamber 31 along with the negative pressure oscillation, and the residual coal sample may be cleaned.
Further, referring to fig. 1, the coal sampler further includes a coal sample separator 16, the coal sample separator 16 being in communication with the suction fan 14 for separating and collecting a coal sample in the air stream drawn by the suction fan 14. Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A coal sampler, comprising:
the device comprises a frame, wherein a turning arm is rotatably arranged on the frame, and a sample adding mechanism and a first container which is communicated with an inlet of the sample adding mechanism and is used for containing a coal sample are arranged on the turning arm;
the weighing mechanism is arranged on the rack, a second container is placed on the weighing mechanism, and the weighing mechanism is used for weighing the weight value of the coal sample in the second container;
the first driving mechanism is connected with the overturning arm and used for driving the overturning arm to overturn so as to enable the first container to be inverted, and the outlet of the sample adding mechanism is opposite to the inlet of the second container;
the first detection mechanism is used for detecting first state information of whether the overturning arm overturns or not; and
the controller is respectively connected with the sample adding mechanism, the first detecting mechanism and the weighing mechanism and is used for receiving the first state information and controlling the sample adding mechanism to add the coal sample in the first container to the second container when the first state information is that the overturning arm overturns, and the controller is also used for receiving the weight value and controlling the sample adding mechanism to stop filling when the weight value is equal to a preset value.
2. The coal sampler of claim 1, wherein the sampling mechanism comprises:
a receiving chamber having an inlet and an outlet, the inlet of the receiving chamber communicating with the outlet of the first container;
the first pushing rod is arranged in the accommodating chamber, and is provided with a first spiral blade which is arranged spirally along the length direction of the first pushing rod, one end of the first spiral blade is opposite to the inlet of the accommodating chamber, and the other end of the first spiral blade is opposite to the outlet of the accommodating chamber; and
the second driving mechanism is respectively connected with the controller and the first pushing rod and is used for driving the first pushing rod to rotate or stop driving along a first direction according to a control instruction of the controller so as to push out the coal sample in the accommodating chamber.
3. The coal sampler of claim 2, wherein the loading mechanism further comprises:
the second pushing rod is arranged in the accommodating chamber and is parallel to the first pushing rod, second spiral blades which are spirally arranged along the length direction of the second pushing rod are arranged on the second pushing rod, and the second spiral blades and the first spiral blades are mutually staggered;
the input end of the transmission mechanism is connected with the second driving mechanism, and the output end of the transmission mechanism is connected with the second pushing rod;
the second driving mechanism drives the second pushing rod to rotate through the transmission mechanism.
4. A coal sampler according to claim 2 or 3, characterized in that,
a baffle is arranged at the outlet of the sample adding mechanism in a sliding way;
the coal sampler further comprises:
the third driving mechanism is respectively connected with the controller and the baffle plate and is used for driving the baffle plate to close or open the outlet of the accommodating chamber;
the controller is further used for judging that when the first state information is that the overturning arm overturns, the third driving mechanism is controlled to drive the baffle to open the outlet of the accommodating chamber;
the controller is also used for judging that when the weight value is equal to a preset value, the third driving mechanism is controlled to drive the baffle to close the outlet of the accommodating chamber.
5. The coal sampler of any one of claims 1 to 3 and further comprising:
the fourth driving mechanism is arranged on the overturning arm, a supporting piece is arranged at the output end of the fourth driving mechanism, the first container is supported on the supporting piece, and the fourth driving mechanism is used for driving the first container to move so that the first container is clamped between the supporting piece and the inlet of the sampling mechanism;
the second detection mechanism is connected with the controller and is used for detecting whether the bearing piece moves to a preset position or not, so that the first container is clamped between the bearing piece and the inlet of the accommodating chamber, and second state information is obtained;
the first driving mechanism is connected with the controller, and the controller is further used for receiving the second state information and controlling the first driving mechanism to drive the overturning arm to overturn when judging that the second state information is that the bearing piece moves to a preset position.
6. The coal sampler of claim 5, further comprising:
the third detection mechanism is connected with the controller and is used for detecting whether the overturning arm is at an initial position or not and enabling the first container to be upright;
the controller is further configured to receive the third state information, and determine that when the third state information indicates that the turnover arm is at the initial position and the second state information indicates that the support moves to the preset position, control the first driving mechanism to drive the turnover arm to turn.
7. A coal sampler according to claim 2 or 3, characterized in that,
the inlet of the accommodating chamber is communicated with the funnel, and the inlet of the accommodating chamber is communicated with the outlet of the first container through the funnel;
the two opposite sides of the funnel are respectively provided with a first air inlet and a second air inlet;
the outlet of the accommodating chamber is communicated with a conical tube body, the inner diameter of the tube body gradually decreases from the outlet of the accommodating chamber, the end part of the tube body is connected with a shield, and the shield can cover the weighing mechanism and the second container.
8. A coal sampler according to claim 2 or 3, characterized in that,
the controller is also used for controlling the first driving mechanism to drive the overturning arm to overturn to an initial position after controlling the second driving mechanism to stop driving, and then controlling the second driving mechanism to drive the first pushing rod to rotate along a second direction so as to recycle the residual coal sample in the accommodating chamber to the first container;
the first direction is opposite to the second direction.
9. A coal sampler according to claim 2 or 3, characterized in that,
the side wall of the accommodating chamber is provided with an air suction port and a third air inlet which are communicated with the inside of the accommodating chamber;
the coal sampler further comprises an exhaust fan and a gas tank which are respectively connected with the controller, wherein an inlet of the exhaust fan is communicated with the air suction port, and an outlet of the gas tank is communicated with the third air inlet;
the controller is also used for controlling the exhaust fan to form negative pressure in the accommodating chamber and controlling the air tank to charge air flow into the accommodating chamber after the negative pressure is formed.
10. The coal sampler of claim 9, further comprising:
and the coal sample separator is communicated with the exhaust fan.
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| CN201811469605.XA CN109520883B (en) | 2018-11-28 | 2018-11-28 | Coal sampler |
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| CN201811469605.XA CN109520883B (en) | 2018-11-28 | 2018-11-28 | Coal sampler |
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| CN109855709B (en) * | 2019-03-28 | 2024-02-06 | 上海汇像信息技术有限公司 | Automatic sampling and weighing device and weighing method for granular or powder samples |
| CN110260962B (en) * | 2019-05-30 | 2024-05-28 | 平顶山天安煤业股份有限公司 | Powder micro weighing device |
| CN115575658A (en) * | 2022-09-29 | 2023-01-06 | 时新(上海)产品设计有限公司 | Sample adding mechanism |
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