Limestone powder acceptance sampling device and sampling method

Abstract

The limestone powder acceptance sampling device comprises a sampling mechanism installed on a discharging pipe of a limestone powder bin, the sampling mechanism comprises a sampling pipe which is horizontally arranged and penetrates through the discharging pipe, one end of the sampling pipe is blocked, the other end of the sampling pipe is open, and a sampling rod is inserted into the sampling pipe through the opening; the tail end of the sampling rod is connected with a pull rod for pushing and pulling to adjust the position of the sampling rod; a limiting piece for limiting the pull rod is arranged on the sampling tube; a feeding hole is formed in the upper pipe wall of the sampling pipe and is positioned in the blanking pipe; the sampling rod is provided with at least two sampling grooves which are distributed along the axial direction of the sampling rod; discharging ports corresponding to the sampling grooves are formed in the lower pipe wall of the sampling pipe, and the discharging ports are located outside the discharging pipe. The sampling device is installed on the discharging pipe of the limestone powder bin, climbing operation is not needed in the sampling process, the safety coefficient is high, flying dust cannot occur in the sampling process, and the production environment cannot be polluted.

Description

Technical Field

[0001] The invention relates to the technical field of limestone powder sampling, and in particular to a limestone powder acceptance sampling device and a sampling method. Background Art

[0002] Limestone-gypsum wet flue gas desulfurization technology is a widely used flue gas desulfurization technology in power plants. The limestone slurry comes from the limestone powder silo system. The limestone powder silo system is used for storage and weighing and unloading of limestone-gypsum desulfurization devices in power plants. It can be used as a receiving unit or a feeding unit. It, together with self-unloading sealed tank trucks, limestone slurry pools, etc., constitute a complete limestone powder silo system. The quality of limestone powder directly affects the quality of gypsum slurry and the efficiency of desulfurization reaction. It is an important indicator related to environmental protection standards.

[0003] At present, most thermal power plants take samples of limestone powder in the following way: when a limestone tanker arrives, workers climb onto the tanker and stand at the sampling port of the tanker, inserting sampling rods into the limestone powder to collect samples. This is highly dangerous, and dust will be generated during the sampling process, causing environmental pollution.

[0004] Based on the above technical problems, the inventor proposed a limestone powder acceptance sampling device and sampling method. The sampling device is installed on the discharge pipe of the limestone powder silo. There is no need to climb high when sampling, and the safety factor is high. In addition, no dust will be generated during sampling, and the production environment will not be polluted. Summary of the invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a limestone powder acceptance sampling device.

[0006] According to a first aspect of the present invention, there is provided a limestone powder acceptance sampling device, comprising a sampling mechanism installed on a feed pipe of a limestone powder bin, wherein the sampling mechanism comprises a sampling tube which is arranged horizontally and passes through the feed pipe, wherein one end of the sampling tube is blocked and the other end is open, and a sampling rod is inserted into the sampling tube through the opening; the end of the sampling rod is connected to a pull rod for pushing and pulling to adjust the position of the sampling rod, and a limiting member for limiting the pull rod is provided on the sampling tube; a feed port is provided on the upper tube wall of the sampling tube, and the feed port is located inside the feed pipe; at least two sampling slots are provided on the sampling rod along the axial direction thereof; a discharge port corresponding to each sampling slot is provided on the lower tube wall of the sampling tube, and the discharge port is located outside the feed pipe, and a sample bottle is threadedly connected to each discharge port.

[0007] Preferably, the limiting member includes a support rod and a U-shaped limiting plate for clamping the pull rod, the lower end of the U-shaped limiting plate is fixedly connected to the connecting block, one end of the support rod is fixedly connected to the sampling tube, and the other end of the support rod is connected to the connecting block by a fastening bolt. The fastening bolt can be adjusted to be loose, thereby realizing the swing adjustment of the U-shaped limiting plate. When the sampling rod is pushed and pulled, the pull rod is located in the groove of the U-shaped limiting plate, and the U-shaped limiting plate plays a limiting role to prevent the sampling rod from turning over. When the sampling rod needs to be turned over and unloaded, the U-shaped limiting plate is rotated to release the limit on the pull rod, so that the sampling rod can be rotated.

[0008] Preferably, in order to facilitate identification of the insertion depth of the sampling rod, so that the operator can know whether the sampling slot on the sampling rod is in a material receiving state or a non-material receiving state, a bracket is installed on the sampling tube, an indicator arrow is installed on the bracket, and marking lines are provided on the sampling rod and the pull rod. When the first marking line on the sampling rod is opposite to the indicator arrow, the sampling rod blocks the feed port; when the second marking line on the sampling rod is opposite to the indicator arrow, the first sampling slot on the sampling rod is opposite to the feed port, and the limestone powder in the feed tube enters the sampling slot through the feed port to achieve the first sampling; as the sampling rod is further inserted, when the first marking line on the pull rod is opposite to the indicator arrow, the sampling rod blocks the feed port again; after a certain interval, the sampling rod is further inserted, and when the second marking line on the pull rod is opposite to the indicator arrow, the second sampling slot on the sampling rod is opposite to the feed port, and the limestone powder in the feed tube enters the sampling slot through the feed port to achieve the second sampling.

[0009] Preferably, two sampling grooves are provided on the sampling rod, and two discharge ports are provided on the lower tube wall of the sampling tube.

[0010] Preferably, a handle is connected to the end of the pull rod to facilitate holding.

[0011] In a second aspect, the present invention provides a sampling method for the above-mentioned limestone powder acceptance sampling device, comprising the following steps:

[0012] (1) Push the sampling rod so that the first sampling slot is opposite to the feed port to complete the first sampling;

[0013] (2) Push the sampling rod so that the second sampling slot is opposite to the feed port to complete the second sampling;

[0014] (3) Further push the sampling rod until it reaches the end of the sampling tube, and rotate the U-shaped limit plate to release the limit on the pull rod;

[0015] (4) Rotate the pull rod to drive the sampling rod to rotate, so that each sampling slot is opposite to the discharge port, and the limestone powder in the sampling slot is poured out and received by the sample receiving bottle;

[0016] (5) After the pull rod is rotated in the opposite direction, it is pulled back to its original position, and the U-shaped limit plate is rotated to limit the pull rod again, waiting for the next sampling.

[0017] The beneficial effects of the present invention are:

[0018] 1. The present invention installs the sampling device on the discharge pipe of the limestone powder silo, and does not require climbing work during sampling, has a high safety factor, and does not generate dust during sampling, thereby not polluting the production environment.

[0019] 2. Multiple sampling can be achieved through the ingenious design of the sampling mechanism, and the samples taken multiple times are poured and stored separately, which is convenient for distinguishing batches of test samples. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the working state before sampling of the present invention;

[0021] Figure 2 This is a schematic diagram of the working state of the present invention when sampling for the first time;

[0022] Figure 3 This is a schematic diagram of the working state of the second sampling of the present invention;

[0023] Figure 4 This is a schematic diagram of the working state of the sampling rod of the present invention when pouring materials;

[0024] Figure 5 It is a side view of the limiting member of the present invention.

[0025] As shown in the figure:

[0026] 1. Limestone powder bin, 2. Feeding pipe, 3. Sampling tube, 4. Discharge port, 5. Sample bottle, 6. Sampling rod, 7. Sampling slot, 8. Feed port, 9. Marking line, 10. Bracket, 11. Indicator arrow, 12. Support rod, 13. U-shaped limit plate, 14. Pull rod, 15. Handle, 16. Groove, 17. Connecting block. DETAILED DESCRIPTION

[0027] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0028] A limestone powder acceptance sampling device, such as Figure 1-5As shown, the present invention includes a sampling mechanism installed on the feeding pipe 2 of the limestone powder silo 1, and the sampling mechanism includes a sampling tube 3 arranged horizontally and passing through the feeding pipe 2, and the connection position between the sampling tube 3 and the feeding pipe 2 is welded to prevent dust leakage. One end of the sampling tube 3 is blocked, and the other end is open, and the sampling rod 6 is inserted into the sampling tube 3 through the opening. The end of the sampling rod 6 is connected to a pull rod 14 for pushing and pulling to adjust the position of the sampling rod 6, and a limiter for limiting the pull rod 14 is provided on the sampling tube 3. A feed port 8 is provided on the upper tube wall of the sampling tube 3, and the feed port 8 is located inside the feeding pipe 2. At least two sampling slots 7 are distributed along the axial direction of the sampling rod 6. A discharge port 4 corresponding to each sampling slot 7 is provided on the lower tube wall of the sampling tube 3, and the discharge port 4 is located outside the feeding pipe 2, and a sample bottle 5 is threadedly connected to each discharge port 4. Further, the sampling rod 6 is a rectangular sampling rod.

[0029] In this embodiment, two sampling grooves 7 are provided on the sampling rod 6 , and two discharge ports 4 are provided on the lower tube wall of the sampling tube 3 .

[0030] In this embodiment, the limiting member includes a support rod 12 and a U-shaped limiting plate 13 for clamping the pull rod 14. The lower end of the U-shaped limiting plate 13 is fixedly connected to a connecting block 17. One end of the support rod 12 is fixedly connected to the sampling tube 3, and the other end of the support rod 12 is connected to the connecting block 17 by a fastening bolt. The fastening bolt can be adjusted to loosen and tighten, thereby realizing the swing adjustment of the U-shaped limiting plate 13. When the sampling rod 6 is pushed and pulled, the pull rod 14 is located in the groove 16 of the U-shaped limiting plate 13, and the U-shaped limiting plate 13 plays a limiting role to prevent the sampling rod 6 from turning over. When the sampling rod 6 needs to be turned over and unloaded, the U-shaped limiting plate 13 is rotated to release the limit on the pull rod 14, so that the sampling rod 6 can be rotated.

[0031] In this embodiment, a handle 15 is connected to the end of the pull rod 14 to facilitate holding.

[0032] In this embodiment, in order to facilitate the identification of the insertion depth of the sampling rod 6 so that the operator can know whether the sampling slot 7 on the sampling rod 6 is in a material receiving state or a non-material receiving state, a bracket 10 is installed on the sampling tube 3, an indicator arrow 11 is installed on the bracket 10, and marking lines 9 are provided on the sampling rod 6 and the pull rod 14. When the first marking line 9 on the sampling rod 6 is opposite to the indicating arrow 11, the sampling rod 6 blocks the feed port 8; when the second marking line 9 on the sampling rod 6 is opposite to the indicating arrow 11, the first sampling slot 7 on the sampling rod 6 is opposite to the feed port 8, and the limestone powder in the discharge pipe 2 enters the sampling slot 7 through the feed port 8 to achieve the first sampling; as the sampling rod 6 is further inserted, when the first marking line 9 on the pull rod 14 is opposite to the indicating arrow 11, the sampling rod 6 blocks the feed port 8 again; after a certain interval, the sampling rod 6 is further inserted, and when the second marking line 9 on the pull rod 14 is opposite to the indicating arrow 11, the second sampling slot 7 on the sampling rod 6 is opposite to the feed port 8, and the limestone powder in the discharge pipe 2 enters the sampling slot 7 through the feed port 8 to achieve the second sampling.

[0033] The sampling method of the above-mentioned limestone powder acceptance sampling device comprises the following steps:

[0034] (1) Push the sampling rod 6 so that the first sampling slot 7 is opposite to the feed port 8, completing the first sampling;

[0035] (2) Push the sampling rod 6 so that the second sampling slot 7 is opposite to the feed port 8, completing the second sampling;

[0036] (3) Further push the sampling rod 6 to make it reach the end of the sampling tube 3, and rotate the U-shaped limiting plate 13 to release the limiting position of the pull rod 14;

[0037] (4) Rotate the pull rod 14 to drive the sampling rod 6 to rotate, so that each sampling slot 7 is opposite to the discharge port 4, and the limestone powder in the sampling slot 7 is poured out and received by the sample receiving bottle 5;

[0038] (5) After the pull rod 14 is rotated in the opposite direction, it is pulled back to its original position, and the U-shaped limiting plate 13 is rotated to limit the pull rod 14 again, waiting for the next sampling.

[0039] Of course, the above description is not limited to the above examples. Technical features not described in the present invention can be achieved by or by using existing technologies, which will not be described here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not depart from the purpose of the present invention, and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A limestone powder acceptance sampling device, characterized in that: The invention comprises a sampling mechanism installed on a feeding pipe of a limestone powder bin, wherein the sampling mechanism comprises a sampling pipe which is arranged horizontally and passes through the feeding pipe, wherein one end of the sampling pipe is blocked and the other end is open, and a sampling rod is inserted into the sampling tube through the opening; the end of the sampling rod is connected to a pull rod which is used for pushing and pulling to adjust the position of the sampling rod, and a limiting member for limiting the pull rod is provided on the sampling tube; a feed port is provided on the upper tube wall of the sampling tube, and the feed port is located inside the feeding pipe; at least two sampling grooves are provided on the sampling rod along the axial direction thereof; a discharge port corresponding to each sampling groove is provided on the lower tube wall of the sampling tube, and the discharge port is located outside the feeding pipe, and a sample bottle is threadedly connected to each discharge port.

2. A limestone powder acceptance sampling device according to claim 1, characterized in that: The limiting member includes a support rod and a U-shaped limiting plate for clamping the pull rod, the lower end of the U-shaped limiting plate is fixedly connected to the connecting block, one end of the support rod is fixedly connected to the sampling tube, and the other end of the support rod is connected to the connecting block by a fastening bolt.

3. A limestone powder acceptance sampling device according to claim 1, characterized in that: A bracket is installed on the sampling tube, an indicating arrow is installed on the bracket, and marking lines are provided on the sampling rod and the pull rod.

4. A limestone powder acceptance sampling device according to claim 1, characterized in that: Two sampling slots are arranged on the sampling rod, and two discharge ports are arranged on the lower tube wall of the sampling tube.

5. A limestone powder acceptance sampling device according to claim 1, characterized in that: Attach a handle to the end of the pull rod.

6. The sampling method of the sampling device according to any one of claims 1 to 5, characterized in that , including the following steps: (1) Push the sampling rod so that the first sampling slot is opposite to the feed port to complete the first sampling; (2) Push the sampling rod so that the second sampling slot is opposite to the feed port to complete the second sampling; (3) Further push the sampling rod until it reaches the end of the sampling tube, and rotate the U-shaped limit plate to release the limit on the pull rod; (4) Rotate the pull rod to drive the sampling rod to rotate, so that each sampling slot is opposite to the discharge port, and the limestone powder in the sampling slot is poured out and received by the sample receiving bottle; (5) After the pull rod is rotated in the opposite direction, it is pulled back to its original position, and the U-shaped limit plate is rotated to limit the pull rod again, waiting for the next sampling.

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