Coal conveying falling flow sampling device

Abstract

The invention belongs to the technical field of coal flow sampling, and discloses a coal conveying falling flow sampling device which comprises a coal conveying structure, a division conveying structure, a sampling structure and a rejected sample collecting structure. The coal flow conveyed by the coal conveying structure falls onto the division belt, the sampling opening is formed in the division belt, and the coal flow can fall onto the sampling belt through the sampling opening, so that a coal sample of a complete falling flow section is collected, and sampling bias is effectively prevented. The collected coal sample is sent out through the sampling belt for subsequent detection and the like; and the residual coal flow continues to be transmitted along with the division belt until the residual coal flow falls onto the rejected sample collecting structure. When the bias verification is subsequently carried out according to the national standard, manual sampling can be carried out on the rear side of the sampling port along the transmission direction of the division belt, so that manual sampling comparison of the area nearby mechanical sampling is realized; when the precision is checked, the rejected sample is prepared into a reserved sample again according to the national standard requirement. The device is provided with a discarded sample collecting structure, so that all discarded samples can be collected, and subsequent precision verification is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of coal flow sampling, and in particular to a coal conveying falling flow sampling device. Background Art

[0002] Mechanized belt sampling devices for coal ore are generally installed in power plants and ports for sampling coal ore. As a key device for coal quality supervision, the representativeness of its sampling and the reliability of its long-term operation are crucial.

[0003] The traditional coal flow sampling device cannot effectively collect the bottom coal sample because the scraper of the cross-belt sampler cannot completely fit with the coal conveyor belt, and the side plate of the falling flow sampler easily ejects the coal sample particles; that is, the cross-belt sampler easily discards the small powder particles at the bottom, while the falling flow sampler easily discards the large particles, which will lead to sampling bias. In addition, in the subsequent performance verification test of the mechanical sampler, the sampling of manual belt stop sampling and mechanical sampling were compared and analyzed, but the current belt coal conveyor system cannot be set to frequently start and stop with load, resulting in the reference method of sampling by manual belt stop specified in the national standard cannot be implemented in actual work. Summary of the invention

[0004] The object of the present invention is to provide a coal conveying falling flow sampling device, which can effectively ensure unbiased sampling while ensuring a complete coal flow shape.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A coal conveying falling flow sampling device is provided, comprising:

[0007] A coal conveying structure for conveying coal flow;

[0008] The contraction conveying structure is arranged below the coal conveying structure, and comprises a contraction belt and a first mounting frame. The contraction belt is drivably arranged on the first mounting frame along a first horizontal direction, and the contraction belt is used to receive the coal flow conveyed by the coal conveying structure. A sampling port is provided on the contraction belt;

[0009] A sampling structure, comprising a sampling belt and a second mounting frame, wherein the sampling belt is drivably arranged on the second mounting frame along a second horizontal direction, and the sampling belt is located below the sampling port, and is used to receive the coal sample collected through the sampling port, and the first horizontal direction is perpendicular to the second horizontal direction;

[0010] The discarded sample collection structure is arranged at the bottom side of the reduction conveying structure, and is used to receive the remaining coal flow after the reduction belt is sampled.

[0011] As an optional solution for the coal transport falling flow sampling device, the discarded sample collection structure includes:

[0012] A third mounting frame is disposed below the sampling belt;

[0013] The sample discarding belt is drivably arranged on the third mounting frame, and is used to receive the remaining coal flow after the sampling of the reduction belt.

[0014] As an optional solution for the coal conveyor falling flow sampling device, a scraper is provided on the third mounting frame, and one end of the scraper away from the third mounting frame abuts against the reduction belt.

[0015] As an optional solution for the coal conveying falling flow sampling device, the coal conveying falling flow sampling device also includes a lifting structure, the input end of the lifting structure is connected to the output end of the sample discarding belt, and the output end of the lifting structure is connected to the coal conveying structure.

[0016] As an optional solution for the coal conveying falling flow sampling device, the size of the sampling port is adjustable.

[0017] As an optional solution for the coal conveyor falling flow sampling device, a plurality of sampling ports are provided, and the plurality of sampling ports are arranged at intervals on the contraction belt.

[0018] As an optional solution for the coal conveyor falling flow sampling device, the sampling structure also includes a collector, and the collector is connected to the output end of the sampling belt.

[0019] As an optional solution for the coal conveying falling flow sampling device, the coal conveying structure includes:

[0020] A coal storage box for storing the coal flow to be transported;

[0021] A guide plate is arranged at the output end of the coal storage box and is located above the reduction belt.

[0022] As an optional solution for the coal conveying falling flow sampling device, the contraction conveying structure also includes two first baffles, which are arranged at intervals on both sides of the first mounting frame along the second horizontal direction, and each of the first baffles extends along the first horizontal direction.

[0023] As an optional solution for the coal conveying falling flow sampling device, the sampling structure also includes two second baffles, which are arranged at intervals on both sides of the second mounting frame along the first horizontal direction, and each second baffle extends along the second horizontal direction.

[0024] Beneficial effects of the present invention:

[0025] The present invention provides a coal conveying falling flow sampling device, comprising a coal conveying structure, a contraction transmission structure, a sampling structure and a discarded sample collection structure. The coal conveying structure is used to convey coal flow. The contraction transmission structure is arranged below the coal conveying structure, comprising a contraction belt and a first mounting frame. The contraction belt is drivably arranged on the first mounting frame along a first horizontal direction. The contraction belt is used to receive the coal flow conveyed by the coal conveying structure. A sampling port is provided on the contraction belt. The sampling structure comprises a sampling belt and a second mounting frame. The sampling belt is drivably arranged on the second mounting frame along a second horizontal direction. The sampling belt is located below the sampling port. The first horizontal direction is perpendicular to the second horizontal direction. The discarded sample collection structure is arranged at the bottom side of the contraction transmission structure, and is used to receive the remaining coal flow after the contraction belt sampling. The coal sample falling through the sampling port falls directly onto the sampling belt to collect the coal sample of the complete falling flow section, which can effectively prevent sampling bias. The collected coal sample is sent out through the sampling belt for subsequent detection, etc. The remaining coal flow continues to be driven with the contraction belt until it falls onto the discarded sample collection structure.

[0026] When the bias of the sampling device is subsequently verified, a human-machine comparison method is used in accordance with the national standard. The specific measures are to manually collect coal samples near the mechanical sampling, prepare samples for testing, and evaluate the deviation between mechanical sampling and manual sampling through calculation, which effectively solves the problem of being unable to perform manual sampling near the mechanical sampling coal flow in the traditional falling flow sampling method. Specifically, after the collected coal sample falls onto the sampling belt through the sampling port, the device can shut down the entire device, and perform manual sampling at the rear side of the sampling port along the transmission direction of the reduction belt, so as to achieve manual sampling comparison in the area near the mechanical sampling, and ensure that performance tests can be carried out in accordance with the national standard.

[0027] When the sampling device is verified for precision, the discarded samples need to be re-prepared into retained samples according to national standards. The device is provided with a discarded sample collection structure, which can collect all discarded samples for subsequent precision verification. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a coal conveying falling flow sampling device provided in an embodiment of a specific implementation of the present invention.

[0029] In the figure:

[0030] 1. Coal conveying structure; 11. Coal storage box; 12. Guide plate;

[0031] 2. contraction transmission structure; 21. contraction belt; 210. sampling port; 22. first mounting frame; 23. first baffle;

[0032] 3. Sampling structure; 31. Sampling belt; 32. Second mounting frame;

[0033] 4. Waste sample collection structure; 41. Third mounting frame; 42. Waste sample belt; 43. Scraper. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] In the description of this embodiment, the terms "upper", "lower", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0038] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0039] like Figure 1As shown, the present embodiment provides a coal conveying falling flow sampling device, including a coal conveying structure 1, a contraction conveying structure 2, a sampling structure 3 and a discarded sample collecting structure 4. The coal conveying structure 1 is used to convey the coal flow. The contraction conveying structure 2 is arranged below the coal conveying structure 1, and includes a contraction belt 21 and a first mounting frame 22. The contraction belt 21 is drivably arranged on the first mounting frame 22 along a first horizontal direction. The contraction belt 21 is used to receive the coal flow conveyed by the coal conveying structure 1. A sampling port 210 is provided on the contraction belt 21; the sampling structure 3 includes a sampling belt 31 and a second mounting frame 32. The sampling belt 31 is drivably arranged on the second mounting frame 32 along a second horizontal direction. The sampling belt 31 is located below the sampling port 210, and the first horizontal direction is perpendicular to the second horizontal direction; the discarded sample collecting structure 4 is arranged on the bottom side of the contraction conveying structure 2, and is used to receive the remaining coal flow after sampling by the contraction belt 21. The coal sample falling through the sampling port 210 falls directly onto the sampling belt 31 to collect the coal sample of the complete falling flow section, which can effectively prevent sampling bias. The collected coal sample is sent out through the sampling belt 31 for subsequent testing, etc. The remaining coal flow continues to be driven by the reduction belt 21 until it falls on the abandoned sample collection structure 4.

[0040] When the bias of the sampling device is subsequently verified, a human-machine comparison method is used in accordance with the national standard. The specific measures are to manually collect coal samples near the mechanical sampling, prepare samples for testing, and evaluate the deviation between mechanical sampling and manual sampling by calculation, which effectively solves the problem that in the traditional falling flow sampling method, it is impossible to perform manual sampling near the mechanical sampling coal flow. Specifically, after the collected coal sample falls onto the sampling belt 31 through the sampling port 210, the device can shut down the entire device, and perform manual sampling at the rear side of the sampling port 210 along the transmission direction of the reduction belt 21, so as to realize the manual sampling comparison of the area near the mechanical sampling, and ensure that the performance test can be carried out in accordance with the national standard.

[0041] When the sampling device is subjected to precision verification, the discarded samples need to be re-prepared into retained samples according to national standards. The device is provided with a discarded sample collection structure 4, which can collect all discarded samples for subsequent precision verification.

[0042] Specifically, the first mounting frame 22 and the second mounting frame 32 are both provided with a driving mechanism, which is used to drive the transmission of the splitting belt 21 and the transmission of the sampling belt 31, respectively. Exemplarily, the driving mechanism is a motor commonly used in the art. In addition, the first mounting frame 22 and the second mounting frame 32 are also existing structures in the art, and their specific structures refer to the prior art and are not described here. The transmission direction of the splitting belt 21 and the sampling belt 31 is shown by the arrows in the figure.

[0043] Exemplarily, in this embodiment, the projection of the reduction belt 21 on the vertical plane is annular, that is, two reduction belts 21 are arranged at intervals in the vertical direction, the sampling structure 3 is arranged between the two reduction belts, and at least one end of the second mounting frame 31 extends to the outside of the two reduction belts 21 to ensure that the sampling belt 31 can transmit the collected coal samples.

[0044] Optionally, the sampling structure 3 further includes a collector (not shown), which is connected to the output end of the sampling belt 31 and is used to collect the collected coal samples. Specifically, the collector is a common device in the art, and its specific structure and principle refer to the prior art and are not described here.

[0045] Optionally, the size of the sampling port 210 is adjustable to meet different sampling requirements, and has good applicability. Specifically, when the dividing belt 21 is a rubber belt, the size of the sampling port 210 can be adjusted by adding a belt; when the dividing belt 21 is a crawler belt, the size of the sampling port 210 can be adjusted by extracting a crawler.

[0046] Optionally, a plurality of sampling ports 210 are provided, and the plurality of sampling ports 210 are arranged at intervals on the contraction belt 21. The above arrangement can adjust the contraction ratio of the contraction belt 21 to meet the requirement of the coal sample quantity. Alternatively, the size and number of the sampling ports 210 may not be adjusted, but the total length of the contraction belt 21 may be changed to adjust the contraction ratio of the contraction belt 21.

[0047] Optionally, the discarded sample collection structure 4 includes a third mounting frame 41 and a discarded sample belt 42. The third mounting frame 41 is arranged below the sampling belt 31. The discarded sample belt 42 is drivably arranged on the third mounting frame 41, and is used to receive the remaining coal flow after sampling by the reduction belt 21, and collect the remaining coal flow to facilitate subsequent precision verification. Specifically, the transmission direction of the discarded sample belt 42 is shown by the arrow in the figure.

[0048] Furthermore, a scraper 43 is provided on the third mounting frame 41, and one end of the scraper 43 away from the third mounting frame 41 abuts against the shrinking belt 21 to prevent the coal flow from adhering to the shrinking belt 21, ensuring that the remaining coal flow on the shrinking belt 21 can all fall onto the discarded sample belt 42, thereby ensuring the normal operation of the shrinking belt 21; at the same time, it can ensure that the coal flow can fall onto the discarded sample belt 42 along the scraper 43 in an orderly manner.

[0049] Optionally, the coal conveyor falling flow sampling device also includes a lifting structure (not shown in the figure), the input end of the lifting structure is connected to the output end of the sample discarding belt 42, and the output end of the lifting structure is connected to the coal conveying structure 1, so that all the remaining coal flow collected on the sample discarding belt 42 can be transported to the coal conveying structure 1, so as to facilitate subsequent further reduction sampling.

[0050] Specifically, the lifting structure is also an existing device in the art. Its specific structure and principle refer to the existing technology and will not be described in detail here.

[0051] Optionally, the coal conveying structure 1 includes a coal storage box 11 and a guide plate 12. The coal storage box 11 is used to store the coal flow to be transported. The guide plate 12 is arranged at the output end of the coal storage box 11 and is located above the contraction belt 21. Under the guidance of the guide plate 12, the coal flow smoothly and gently falls on the contraction belt 21, and the coal flow can also be shaped, which is conducive to the subsequent sampling of the complete coal flow. Alternatively, in other embodiments, the guide plate 12 may not be provided, and the coal flow directly falls on the contraction belt 21 through the outlet of the coal storage box 11, which can also ensure the sampling of the complete coal flow cross section.

[0052] Optionally, the contraction conveying structure 2 further includes two first baffles 23, which are spaced apart on both sides of the first mounting frame 22 along the second horizontal direction, and each first baffle 23 extends along the first horizontal direction. Under the stopping action of the first baffles 23, the splashing of the coal falling onto the contraction belt 21 can be effectively avoided.

[0053] Optionally, the sampling structure 3 further includes two second baffles (not shown in the figure), which are arranged at intervals on both sides of the second mounting frame 32 along the first horizontal direction, and each second baffle extends along the second horizontal direction. Under the stopping effect of the second baffles, the coal sample falling onto the sampling belt 31 through the sampling port 210 can be effectively prevented from splashing, thereby ensuring the integrity of the coal sample.

[0054] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A coal transport falling flow sampling device, characterized in that: include: A coal conveying structure (1) for conveying a coal flow; The contraction conveying structure (2) is arranged below the coal conveying structure (1), and comprises a contraction belt (21) and a first mounting frame (22). The contraction belt (21) is drivably arranged on the first mounting frame (22) along a first horizontal direction. The contraction belt (21) is used to receive the coal flow conveyed by the coal conveying structure (1); a sampling port (210) is provided on the contraction belt (21); A sampling structure (3), comprising a sampling belt (31) and a second mounting frame (32), wherein the sampling belt (31) is drivably arranged on the second mounting frame (32) along a second horizontal direction, and the sampling belt (31) is located below the sampling port (210) and is used to receive the coal sample collected through the sampling port (210), and the first horizontal direction is perpendicular to the second horizontal direction; The discarded sample collection structure (4) is arranged on the bottom side of the reduction conveying structure (2) and is used to receive the remaining coal flow after sampling by the reduction belt (21).

2. The coal transport falling flow sampling device according to claim 1, characterized in that: The discarded sample collection structure (4) comprises: A third mounting frame (41) is disposed below the sampling belt (31); The sample discarding belt (42) is drivably arranged on the third mounting frame (41) and is used to receive the remaining coal flow after sampling by the reduction belt (21).

3. The coal transport falling flow sampling device according to claim 2, characterized in that: The third mounting frame (41) is provided with a scraper (43), and one end of the scraper (43) away from the third mounting frame (41) abuts against the shrinking belt (21).

4. The coal transport falling flow sampling device according to claim 2, characterized in that: The coal conveying falling flow sampling device also includes a lifting structure, the input end of the lifting structure is connected to the output end of the sample discarding belt (42), and the output end of the lifting structure is connected to the coal conveying structure (1).

5. The coal transport falling flow sampling device according to claim 1, characterized in that: The size of the sampling port (210) is adjustable.

6. The coal transport falling flow sampling device according to claim 1, characterized in that: A plurality of sampling ports (210) are provided, and the plurality of sampling ports (210) are arranged at intervals on the shrinking belt (21).

7. The coal transport falling flow sampling device according to any one of claims 1 to 6, characterized in that: The sampling structure (3) also includes a collector, which is connected to the output end of the sampling belt (31).

8. The coal transport falling flow sampling device according to any one of claims 1 to 6, characterized in that: The coal conveying structure (1) comprises: A coal storage box (11) for storing the coal flow to be transported; A guide plate (12) is arranged at the output end of the coal storage box (11) and is located above the reduction belt (21).

9. The coal transport falling flow sampling device according to any one of claims 1 to 6, characterized in that: The contraction transmission structure (2) further comprises two first baffles (23), the two first baffles (23) being arranged at intervals on both sides of the first mounting frame (22) along the second horizontal direction, and each of the first baffles (23) extending along the first horizontal direction.

10. The coal transport falling flow sampling device according to any one of claims 1 to 6, characterized in that: The sampling structure (3) further comprises two second baffles, which are arranged at intervals on both sides of the second mounting frame (32) along the first horizontal direction, and each second baffle extends along the second horizontal direction.

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