Granary stored grain sampling detector

Abstract

The utility model provides a granary grain storage sampling detector which comprises a sampling pipe, the lower end of the sampling pipe is closed, the side wall of the sampling pipe is provided with a first inlet, a sample separation switching pipe is arranged in the sampling pipe, two grain inlet channels and an air exchange channel which penetrate through the two ends are arranged in the sample separation switching pipe, the lower ports of the two grain inlet channels are blocked by net plates, the two grain inlet channels are provided with second inlets, and the first inlet is communicated with the air exchange channel; a gas baffle is arranged on the inner wall of the sampling pipe, is positioned below the first inlet, and can block the lower port of one grain inlet channel when the second inlet of the grain inlet channel coincides with the first inlet; the sampling machine comprises a main body, a sampling pipe joint and an air exhauster arranged on the main body, two chambers are arranged in the main body, a grain feeding butt joint hole and a ventilation butt joint hole are formed in the sampling pipe joint, the two grain feeding butt joint holes are communicated with the two chambers, a nut is rotationally connected to the outer side of the sampling pipe joint, and the nut is in threaded connection with the upper end of a sampling pipe. The two grain inlet channels of the sampling detector are used for sucking grains and emptying the grains respectively, and the sampling pipe does not need to be pulled out through alternate use.

Description

Technical Field

[0001] This utility model relates to the field of grain storage sampling technology, specifically a grain storage sampling detector. Background Technology

[0002] After the grain is purchased, it will be stored in the grain warehouse. After the grain is stored in the warehouse, it is necessary to take samples and test the grain to avoid problems such as mold and insect infestation.

[0003] Large grain silos use electric samplers for sampling and testing. During sampling, the sampling tube is inserted from the top of the grain pile downwards. Then, a negative pressure is created at the bottom of the sampling tube by electric suction, which draws the grain into the storage chamber of the electric sampler. However, when this type of electric sampler finishes sampling, the sampling tube is full of grain. If sampling is performed again at a different depth, it is impossible to effectively distinguish the grain sampled in the two samplings. If you want to sample at a different depth, you need to remove the sampling tube, empty the grain inside, and then insert it into the grain pile again. This is time-consuming and labor-intensive, especially when sampling at a deeper depth. Moreover, each insertion into the grain pile can only extract samples from one depth, which is inefficient. Utility Model Content

[0004] To address the technical problems existing in the background art, this utility model provides a grain storage sampling detector.

[0005] The technical solution of this utility model is as follows:

[0006] A grain storage sampling detector includes a sampler and a sampling tube. The sampling tube is closed at the lower end and has a first inlet on its side wall. A sampling switching tube is provided inside the tube. The outer diameter of the sampling switching tube is equal to the inner diameter of the sampling tube. It has two grain inlets and a ventilation channel that connect both ends. The lower ends of the two grain inlets are sealed with mesh plates. Each grain inlet has a second inlet. The two second inlets can coincide with the first inlet when the sampling switching tube is rotated. An air baffle is provided on the inner wall of the sampling tube. The air baffle is located below the first inlet and can block the lower end of the grain inlet when the second inlet of one grain inlet coincides with the first inlet.

[0007] The sampler includes a main body, a sampling tube connector, and an air pump mounted on the main body. The main body has two chambers with grain outlets at the bottom of each chamber. The sampling tube connector has grain inlet holes that connect to the two grain inlets and an air exchange hole that connects to the air exchange duct. The upper ends of the two grain inlet holes are connected to the two chambers via flexible hoses. The lower end of the sampling tube connector is connected to the upper end of the sampling switching tube and rotates synchronously. A nut is rotatably connected to the outside of the sampling tube connector. The nut is fitted onto the sampling tube connector and threadedly connected to the upper end of the sampling tube.

[0008] When in use, insert the sampling tube into the grain pile, and rotate the sampling tube connector to drive the sampling switching tube to rotate so that a second inlet coincides with the first inlet. Start the sampling machine, and the grain at the position corresponding to the first inlet is sucked into a grain inlet channel until it enters a chamber. The sampler obtains the sample grain through the grain outlet.

[0009] Once sufficient grain samples are obtained, the sampler is turned off. At this point, one feed duct is full of grain, while the other is empty. First, rotate the sampling switching tube to block the first inlet with the tube wall. Then, adjust the depth of the first inlet. Next, rotate the sampling switching tube to align the second inlet of the empty feed duct with the first inlet. At this point, the lower end of the feed duct is blocked by the baffle plate, while the lower ends of the other feed duct and the ventilation duct are not blocked. Start the sampler. Grain at the corresponding depth enters the other chamber from the empty feed duct. At the same time, grain in the full feed duct is sucked into its corresponding chamber and discharged to the top of the grain pile through the outlet. This method is used to empty the feed ducts for future use.

[0010] The grain storage sampling detector provided in this application allows for the alternating use of two grain inlets by rotating the sampling switching tube. While one grain inlet is drawing sample grain, the other grain inlet is simultaneously emptied for future use. Samples can be taken from different depths of the grain pile without having to pull out the sampling tube. This method is accurate, time-saving, labor-saving, and improves sampling efficiency.

[0011] Preferably, the two feed inlets and one ventilation inlet are distributed around the central axis of the sample switching tube.

[0012] Preferably, the cross-sections of the two feed inlets and one ventilation inlet are all fan-shaped, with the center of the circle on the central axis of the sample switching tube.

[0013] Preferably, the two feed channels and one ventilation channel are formed by the inner hole of the sample switching tube through a partition.

[0014] Preferably, the central angles of the two feed inlet cross sections are equal and less than or equal to the central angle of the air exchange cross section.

[0015] Preferably, the central angle of the two feed passage sections is 110 to 120 degrees.

[0016] Preferably, the upper end face of the sample switching tube wall is provided with a groove, and the lower end of the sample tube connector is provided with a locking tooth that engages with the groove.

[0017] Preferably, multiple slots are evenly provided along the circumference of the sample switching tube wall, and the circumferential width of at least one slot is different from that of the other slots.

[0018] Preferably, it also includes an extension tube, the upper and lower ends of which are threadedly connected to a nut and the upper end of a sampling tube, respectively. The extension tube is provided with a transmission tube, which is provided with three channels that are respectively connected to two feed channels and one ventilation channel. The lower end face of the transmission tube wall is provided with transmission teeth that engage with the slot of the sample switching tube, and the upper end face of the tube wall is provided with a transmission groove that engages with the teeth of the sampling tube connector.

[0019] Preferably, the lower end of the sampling tube is conical.

[0020] This utility model provides a grain storage sampling detector that uses two grain inlet channels alternately by rotating the sampling switching tube. While one grain inlet channel is taking samples, the other grain inlet channel is simultaneously emptied for the next use. Samples can be taken from different depths of the grain pile without removing the sampling tube. The sampling is accurate, time-saving, labor-saving, and improves sampling efficiency. Attached Figure Description

[0021] In the attached diagram:

[0022] Figure 1 A schematic diagram of a grain sampling detector for grain storage.

[0023] Figure 2 This is a schematic diagram of a sampling tube;

[0024] Figure 3 This is a top view of the cross-section of the sampling tube;

[0025] Figure 4 This is a schematic diagram of the sampling tube and the sampling tube connector;

[0026] Figure 5 This is a schematic diagram of the sampling tube, extension tube, and sampling tube connector.

[0027] The components represented by the various reference numerals in the diagram are:

[0028] 1. Sampler; 11. Main body; 111. Chamber; 112. Grain outlet; 12. Sampling tube connector; 121. Grain inlet connection hole; 122. Ventilation connection hole; 123. Clamping teeth; 13. Nut; 14. Air extractor; 2. Sampling tube; 21. First inlet; 22. Air baffle; 3. Sampling switching tube; 31. Grain inlet channel; 32. Ventilation channel; 33. Mesh plate; 34. Second inlet; 35. Slot; 4. Extension tube; 5. Transmission tube; 51. Transmission teeth; 52. Transmission groove. Detailed Implementation

[0029] Example 1

[0030] like Figures 1 to 4 As shown, this embodiment of the invention provides a grain storage sampling detector, including a sampler 1 and a sampling tube 2. Wherein,

[0031] The lower end of the sampling tube 2 is closed, and a first inlet 21 is opened on the side wall. A sample switching tube 3 is provided inside the tube.

[0032] The outer diameter of the sampling switching tube 3 is equal to the inner diameter of the sampling tube 2. It has two feed channels 31 that run through both ends and a ventilation channel 32. The lower ends of the two feed channels 31 are sealed with mesh plates 33. Each of the two feed channels 31 is provided with a second inlet 34, which can coincide with the first inlet 21 when the sampling switching tube 3 rotates.

[0033] The inner wall of the sampling tube 2 is provided with an air baffle 22, which is located below the first inlet 21. When the second inlet 34 of a feed channel 31 coincides with the first inlet 21, the air baffle 22 can block the lower port of the feed channel 31.

[0034] The sampler 1 includes a main body 11, a sampling tube connector 12, and an air pump 14 installed on the main body 11.

[0035] The main body 11 has two chambers 111, and the bottom of the two chambers 111 has a grain outlet 112.

[0036] The sampling tube connector 12 is provided with a grain inlet docking hole 121 that connects to the two grain inlets 31 respectively, and an air exchange docking hole 122 that connects to the air exchange channel 32. The upper ends of the two grain inlet docking holes 121 are connected to the two chambers 111 respectively through flexible tubes. The lower end of the sampling tube connector 12 is connected to the upper end of the sampling switching tube 3 and rotates synchronously. A nut 13 is rotatably connected to the outside of the sampling tube connector 12. The nut 13 is fitted on the sampling tube connector 12 and is threaded to the upper end of the sampling tube 2.

[0037] More in detail, such as Figure 2 As shown, the lower end of the sampling tube is conical to reduce the resistance when the sampling tube is inserted into the grain pile.

[0038] The first inlet 21 is located near the lower end of the sampling tube, and the baffle plate 22 is located below the first inlet 21, protruding horizontally inward from the inner wall of the sampling tube. The baffle plate 22 is spaced from the lower end of the sampling tube to form a ventilation space.

[0039] The sampling switching tube 3 is located inside the sampling tube, coaxial with the sampling tube, and in close contact with the interior of the sampling tube. It can rotate horizontally relative to the sampling tube around its central axis. By rotating the sampling switching tube 3, the two second inlets 34 are made to coincide with the first inlet 21. When the sampling switching tube 3 is inside the sampling tube, its lower end abuts against the baffle plate 22. The baffle plate 22 supports the sampling switching tube 3. The shape of the baffle plate 22 is such that when the sampling switching tube 3 is rotated and one of the second inlets 34 coincides with the first inlet 21, the baffle plate 22 can completely close the lower end of the feed channel 31 corresponding to the second inlet 34, but does not close the lower end of the other feed channel 31 and the lower end of the ventilation channel 32. Thus, the lower ends of the unclosed feed channel 31 and the lower ends of the ventilation channel 32 are connected through the ventilation space below the baffle plate 22.

[0040] Thus, when the vacuum pump 14 is started, the closed grain inlet channel 31 generates negative pressure at the second inlet 34 to suck up grain, while the unclosed grain inlet channel 31 generates suction. Since its lower end is connected to the ventilation channel 32, which is connected to the external environment, external air enters the unclosed grain inlet channel 31 through the ventilation channel 32, causing gas or grain to flow in the unclosed grain inlet channel 31. If the unclosed grain inlet channel 31 is full of grain, this part of the grain will be drawn into the chamber 111 of the sampler 1, thereby achieving the purpose of emptying the unclosed grain inlet channel 31.

[0041] The lower ends of the two grain inlets 31 are sealed with mesh panels 33, which not only prevents grain from entering the ventilation space, but also ensures the connection between the unsealed grain inlets 31 and the ventilation channel 32.

[0042] In addition, there are two sections of the sample switching tube 3 between the two second inlets 34, and at least one section of the tube wall is wider than the first inlet 21 so that rotating the sample switching tube 3 can block the first inlet 21, thereby preventing grain from entering the grain inlet channel 31 during the insertion of the sampling tube into the grain pile.

[0043] More specifically, such as Figure 3 As shown, in this embodiment, two grain inlets 31 and one ventilation inlet 32 ​​are distributed around the central axis of the sample switching tube 3, and the cross-sections are preferably fan-shaped, with the center of the circle on the central axis of the sample switching tube 3.

[0044] Two grain inlets 31 and one ventilation duct 32 can be formed by the inner hole of the sample switching tube 3 through a partition.

[0045] The central angles of the two grain inlet channels 31 are equal and less than or equal to the central angle of the ventilation channel 32, preferably 110 to 120 degrees, so that the air intake of the ventilation channel 32 can meet the air extraction of the unsealed grain inlet channel 31, and avoid negative pressure in the grain inlet channel 31, which would affect the emptying operation of the grain inlet channel 31.

[0046] Please refer to the following: Figure 4 As shown, the shape and arrangement of the grain inlet connection hole 121 and the ventilation connection hole 122 in the sampling tube connector 12 are the same as those of the grain inlet channel 31 and the ventilation channel 32 in the sampling switching tube 3, so that they can correspond completely one by one.

[0047] In addition, the upper end face of the sample switching tube 3 is provided with a groove 35, and the lower end of the sampling tube connector 12 is provided with a locking tooth 123 that engages with the groove 35. The sampling tube connector 12 is connected to the sampling tube through a nut 13. When connected, the locking tooth 123 is engaged in the groove 35. While fixing the nut 13 or the sampling tube, the sampling tube connector 12 is rotated. The sampling tube connector 12 transmits torque to the sample switching tube 3 through the engagement of the locking tooth 123 and the groove 35, driving the sample switching tube 3 to rotate, thereby realizing the alternating overlap of the two second inlets 34 and the first inlet 21.

[0048] Preferably, multiple slots 35 are evenly provided along the circumference of the sample switching tube 3, and at least one of the slots 35 has a different circumferential width than the other slots 35, so that when the sample tube connector 12 is connected to the sample tube, it can play a foolproof role and avoid the grain inlet connection hole 121 and the ventilation connection hole 122 being difficult to align with the grain inlet channel 31 and the ventilation channel 32.

[0049] The upper end of the ventilation port 122 is directly exposed and connected to the surrounding air. The two grain inlet ports 121 are connected to the two chambers 111 of the sampler 1 via flexible hoses. The air extractor 14 simultaneously extracts air from the two chambers 111. The grain in the two grain inlets 31 enters the two chambers 111 through the two grain inlet ports 121, and then the grain is sampled through the grain outlet 112. The grain in the other chamber 111 is discharged to the top of the grain pile.

[0050] A switch valve (not shown in the figure) may be installed at the grain outlet 112.

[0051] In this embodiment, the other structural components of the sampler 1 can refer to the structure of the sampler 1 in existing products, and will not be described in detail in this embodiment.

[0052] When using the grain storage sampling detector provided in this embodiment, the sampling tube 2 is inserted into the grain pile. By fixing the sampling tube and rotating the sampling tube connector 12, the sampling switching tube 3 is rotated so that a second inlet 34 coincides with the first inlet 21. Then the sampler 1 is started, and the grain at the position corresponding to the first inlet 21 is sucked into the grain inlet channel 31 connected to it until it enters a chamber 111. The sampler obtains the sample grain through the grain outlet 112.

[0053] Once sufficient grain samples are obtained, the sampler 1 is turned off. At this point, one grain inlet channel 31 is filled with grain, while the other is empty. Then, the sampling switching tube 3 is rotated to block the first inlet 21 with its wall (the ventilation channel 32 can be rotated towards the first inlet 21 to block the first inlet 21 with its corresponding wall). The depth of the first inlet 21 is then adjusted by inserting and removing the sampling tube. The sampling switching tube 3 is then rotated again to make the second inlet 34 of the empty grain inlet channel 31 coincide with the first inlet 21. At this point, the lower end of the grain inlet channel 31 is blocked by the baffle plate 22, while the lower ends of the other grain inlet channel 31 and the ventilation channel 32 are not blocked. The sampler 1 is then started, and grain at the corresponding depth enters the other chamber 111 from the empty grain inlet channel 31 for sampling. At the same time, the grain in the grain-filled grain inlet channel 31 is sucked into its corresponding chamber 111 and discharged to the top of the grain pile through the grain outlet 112. This method is used to empty the grain inlet channel 31 for future use.

[0054] Example 2

[0055] like Figure 5 As shown, this embodiment is basically the same as Embodiment 1, except that the grain storage sampling detector also includes an extension tube 4, and the sampling tube 2 is indirectly connected to the sampling tube connector 12 through the extension tube 4. The extension tube 4 is used to increase the insertion depth of the sampling tube 2.

[0056] Specifically, the upper and lower ends of the extension tube 4 are threaded, and are threaded to the nut 13 and the upper end of the sampling tube 2. The inner and outer diameters of the extension tube 4 are the same as those of the sampling tube.

[0057] The extension tube 4 is equipped with a transmission tube 5. The transmission tube 5 is equipped with three channels that are respectively connected to two grain inlets 31 and one ventilation channel 32. The lower end face of the tube wall of the transmission tube 5 is equipped with a transmission tooth 51 that engages with the slot 35 of the sample switching tube 3. The upper end face of the tube wall is equipped with a transmission groove 52 that engages with the tooth 123 of the sample tube connector 12.

[0058] The cross-section of the transmission tube 5 is the same as that of the sample switching tube 3.

[0059] The sampling tube 2 and the sampling tube connector 12 can be connected with different numbers of extension tubes 4 and transmission tubes 5 as needed.

[0060] The grain storage sampling detector provided in this application allows for the alternating use of two grain inlet channels 31 by rotating the sampling switching tube 3. While one grain inlet channel 31 is absorbing sample grain, the other grain inlet channel 31 is simultaneously emptied for future use. Samples can be taken from different depths of the grain pile without removing the sampling tube, resulting in accurate, time-saving, and labor-saving sampling, thus improving sampling efficiency.

Claims

1. A grain storage sampling detector, comprising a sampler (1) and a sampling tube (2), characterized in that, The sampling tube (2) is closed at the lower end and has a first inlet (21) on the side wall. A sampling switching tube (3) is provided inside the tube. The outer diameter of the sampling switching tube (3) is equal to the inner diameter of the sampling tube (2). It has two feed channels (31) that pass through both ends and a ventilation channel (32). The lower ends of the two feed channels (31) are sealed with mesh plates (33). Both feed channels (31) are provided with second inlets (34). The two second inlets (34) can overlap with the first inlet (21) when the sampling switching tube (3) rotates. The inner wall of the sampling tube (2) is provided with a baffle plate (22). The baffle plate (22) is located below the first inlet (21) and can block the lower end of the feed channel (31) when the second inlet (34) of a feed channel (31) overlaps with the first inlet (21). The sampler (1) includes a main body (11), a sampling tube connector (12), and an air pump (14) installed on the main body (11). The main body (11) has two chambers (111), and the bottom of the two chambers (111) has a grain outlet (112). The sampling tube connector (12) has a grain inlet docking hole (121) that connects to the two grain inlets (31) respectively, and an air exchange docking hole (122) that connects to the air exchange channel (32). The upper ends of the two grain inlet docking holes (121) are connected to the two chambers (111) respectively through flexible tubes. The lower end of the sampling tube connector (12) is connected to the upper end of the sampling switching tube (3) and rotates synchronously. A nut (13) is rotatably connected to the outside of the sampling tube connector (12). The nut (13) is fitted on the sampling tube connector (12) and threadedly connected to the upper end of the sampling tube (2).

2. A grain bin stored grain sampling probe as described in claim 1, wherein, The two feed channels (31) and one ventilation channel (32) are distributed around the central axis of the sample switching tube (3).

3. A grain bin stored grain sampling probe as described in claim 2, wherein, The cross-sections of the two feed channels (31) and one ventilation channel (32) are all fan-shaped, and the center of the circle is on the central axis of the sample switching tube (3).

4. A grain bin stored grain sampling probe as set forth in claim 3, wherein, The two feed channels (31) and one ventilation channel (32) are formed by the inner hole of the sample switching tube (3) through a partition.

5. A grain bin stored grain sampling probe as set forth in claim 4, wherein, The central angles of the two feed passages (31) are equal and less than or equal to the central angle of the ventilation passage (32).

6. A grain bin stored grain sampling probe as set forth in claim 5, wherein, The central angle of the cross section of the two feed channels (31) is 110 to 120 degrees.

7. A grain bin stored grain sampling probe as described in claim 1, wherein, The upper end face of the sample switching tube (3) is provided with a groove (35), and the lower end of the sample tube connector (12) is provided with a locking tooth (123) that engages with the groove (35).

8. A grain storage sampling detector as described in claim 7, characterized in that, The slots (35) are evenly provided in multiple ways along the circumference of the sample switching tube (3), and the circumferential width of at least one slot (35) is different from that of the other slots (35).

9. A grain bin stored grain sampling probe as set forth in claim 8, wherein, It also includes an extension tube (4), the upper and lower ends of which are threadedly connected to the nut (13) and the upper end of the sampling tube (2), respectively. The extension tube (4) is provided with a transmission tube (5), and the transmission tube (5) is provided with three channels that are respectively connected to two feed channels (31) and one ventilation channel (32). The lower end face of the tube wall of the transmission tube (5) is provided with a transmission tooth (51) that engages with the slot (35) of the sample switching tube (3), and the upper end face of the tube wall is provided with a transmission groove (52) that engages with the tooth (123) of the sampling tube connector (12).

10. A bulk grain sampling probe according to any one of claims 1 to 9 wherein, The lower end of the sampling tube (2) is conical.

Images