Automatic closed sampling device for caustic soda flakes

Abstract

The utility model relates to the technical field of pipeline sampling, in particular to an automatic closed sampling device for caustic soda flakes, which comprises a sampling pipe, one end of the sampling pipe is used for being fixed on the side wall of a caustic soda flakes hopper, and the other end of the sampling pipe is fixedly provided with a closed bottom plate. One end of the sampling rod slidably penetrates through and extends out of the closed bottom plate and then is coaxially connected with the output end of the first air cylinder; a sampling groove is formed in the side wall of one end, away from the first cylinder, of the sampling rod; the first cylinder is in transmission connection with an output shaft of the servo motor; a sampling opening is formed in the side face of the bottom of the sampling pipe, a sampling cavity is connected to the sampling opening, the bottom of the sampling cavity is detachably communicated with a sampling bottle, and the side wall of the sampling cavity is communicated with a negative pressure suction mechanism; a scraping mechanism is arranged at one end of the sampling pipe connected with the caustic soda flake hopper. According to the utility model, residual caustic soda flakes can be prevented from influencing sampling representativeness; the problem of personnel injury caused by moisture absorption and unsafe factors in the manual sampling process of the caustic soda flakes is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline sampling technical field especially relates to a piece alkali automatic closed sampler. BACKGROUND

[0002] At present, piece alkali production belongs to continuity production, temperature is high and has strong corrosive nature, and the quality inspection and analysis of powder generally adopt manual sampling in time in the field discharge opening or packing bag, in the sampling process, because of manual sampling operation, the piece alkali in the air stays for a long time, which can absorb moisture and carbon dioxide in the air, resulting in unqualified piece alkali, and the sampling is not representative or the piece alkali absorbs moisture, which increases the unsafe factors in sampling and can cause the sample to lose representativeness. SUMMARY

[0003] The utility model solves the technical problem that the piece alkali automatic closed sampler provides, solves the problem that the piece alkali absorbs moisture and causes personnel injury in the manual sampling process.

[0004] The utility model discloses a kind of piece alkali automatic closed samplers, including sampling pipe, one end of the sampling pipe is used to be fixed on the side wall of piece alkali hopper, another end is fixedly provided with closed bottom plate, sampling rod is equipped in the sampling pipe, the sampling rod is coaxially connected with the output end of first cylinder after one end slidingly passing through and extending the closed bottom plate, the first cylinder is used to drive the sampling rod to insert the piece alkali hopper;Sampling groove is equipped on the side wall of the end of the sampling rod away from the first cylinder, the first cylinder is transmission connection with the output shaft of servo motor, for axial rotation under the driving of the servo motor;Sampling port is equipped on the bottom side of the sampling pipe, sampling cavity is connected at the sampling port, sampling bottle is detachably communicated at the bottom of the sampling cavity, negative pressure suction mechanism is communicated on the side wall of the sampling cavity;The end of the sampling pipe connected with the piece alkali hopper is equipped with scraping mechanism for scraping piece alkali in the sampling groove.

[0005] The utility model has the advantages that: the piece alkali in the sampling groove is scraped off before sampling, then the residual piece alkali is sucked back by negative pressure suction mechanism, to prevent the residual piece alkali from affecting sampling representativeness;The utility model carries out automatic sampling under completely closed condition, to solve the problem that piece alkali absorbs moisture and causes personnel injury in the manual sampling process.

[0006] On the basis of the above technical scheme, the utility model can also be improved as follows.

[0007] Further, sampling valve is provided at the sampling port, one end of the sampling valve is communicated with the sampling port, and the other end is communicated with the sampling cavity. Further, sampling valve is provided at the sampling port, one end of the sampling valve is communicated with the sampling port, and the other end is communicated with the sampling cavity.

[0008] The beneficial effect of the further scheme is that the sampling valve can seal the space in the sampling tube after sampling, ensure the sealing of the sampling tube, and avoid the influence of the external environment on sampling.

[0009] Further, the bottom opening of the sampling cavity is fixedly connected with a quick-release buckle, and the sampling bottle is detachably fixedly connected with the quick-release buckle.

[0010] The beneficial effect of the further scheme is that the quick-release buckle can facilitate the disassembly and assembly of the sampling bottle.

[0011] Further, a communication hole for the sampling rod to pass through is arranged on the sidewall of the caustic soda hopper, and a plugging mechanism for plugging the communication hole is arranged on both ends of the sampling rod.

[0012] The beneficial effect of the further scheme is that the plugging mechanism at both ends of the sampling rod can prevent the caustic soda in the caustic soda hopper from being sucked when the negative pressure suction mechanism sucks the residual caustic soda in the sampling tube, and the plugging mechanism close to the caustic soda hopper can isolate the caustic soda hopper and the sampling tube after sampling, so as to prevent the caustic soda in the caustic soda hopper from entering the sampling tube when no sampling is performed.

[0013] Further, the plugging mechanism comprises a plugging plate, and two plugging plates are fixedly arranged on the sampling rod at intervals, and the sampling groove is arranged between the two plugging plates.

[0014] The beneficial effect of the further scheme is that the plugging mechanism adopts a plugging plate to plug the communication hole, and the structure is simple.

[0015] Further, the communication hole is a circular hole, at least two ends of the sampling rod are in a cylindrical structure with the same diameter as the inner diameter of the communication hole, and the cylindrical structure and the circular hole are in sliding sealing to form the plugging mechanism.

[0016] The beneficial effect of the further scheme is that the two ends of the sampling rod adopt a cylindrical structure with the same diameter as the inner diameter of the communication hole, and the communication hole is plugged in a sliding sealing manner, so that the structure of the sampling rod is simpler.

[0017] Further, the scraping mechanism comprises a second air cylinder and a first scraper, the second air cylinder is arranged vertically below one end of the sampling tube connected to the caustic soda hopper, the output end of the second air cylinder is fixedly connected with the first scraper for driving the first scraper to extend into the sampling groove, and the upper part of the first scraper matches the cross-sectional shape of the sampling groove.

[0018] The beneficial effect of the further scheme is that the first scraper is pushed by the second cylinder, the upper part of the first scraper is inserted into the sampling groove, the residual caustic soda on the inner wall of the sampling groove is scraped in the case of linear motion of the sampling rod, then the first scraper is retracted by the second cylinder to exit the sampling groove, and the linear motion and rotation of the sampling rod are not affected.

[0019] Further, the scraping mechanism comprises a flexible scraper, and the bottom end of the flexible scraper is fixed on the bottom inner wall of the sampling tube.

[0020] The beneficial effect of the further scheme is that the scraping mechanism adopts the flexible scraper, the structure is simple, and the flexible scraper does not affect the linear motion and rotation of the sampling rod.

[0021] Further, the scraping mechanism comprises a second scraper and an elastic telescopic piece, the bottom of the elastic telescopic piece is fixed on the bottom inner wall of the sampling tube, the top of the elastic telescopic piece is fixedly connected with the second scraper, the upper part of the second scraper is matched with the cross-sectional shape of the sampling groove, and the two ends of the sampling groove are in arc transition.

[0022] The beneficial effect of the further scheme is that the scraping mechanism adopts the second scraper driven by the elastic telescopic piece, when the sampling rod is rotated to be downward, the second scraper is inserted into the sampling groove under the action of the elastic telescopic piece, when the sampling rod is linearly moved, the second scraper is moved to the two ends of the sampling groove, and under the action of the arc transition, the second scraper is separated from the sampling groove along the arc transition and is abutted against the outer wall of the sampling rod, and since the two ends of the sampling rod are in cylindrical structure, the abutment of the second scraper on the two ends of the sampling rod does not affect the rotation of the sampling rod.

[0023] Further, the negative pressure suction mechanism comprises a negative pressure cavity and a negative pressure fan installed in the negative pressure cavity, one end of the negative pressure cavity is communicated with the side wall of the sampling cavity, and the other end of the negative pressure cavity is communicated with the recovery container.

[0024] The beneficial effect of the further scheme is that the negative pressure suction mechanism adopts the negative pressure cavity provided with the negative pressure fan, and the structure is simple. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structural schematic view of the utility model embodiment one;

[0026] Figure 2 It is a structural schematic view of the utility model embodiment two;

[0027] Figure 3 It is a structural schematic view of the utility model embodiment three;

[0028] Figure 4 This is a schematic structural diagram of the fourth embodiment of the present utility model;

[0029] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0030] 1. Sampling tube; 2. Caustic soda hopper; 3. Closing bottom plate; 4. Sampling rod; 5. First cylinder; 6. Sampling trough; 7. Servo motor; 8. Sampling port; 9. Sampling cavity; 10. Sampling bottle; 11. Sampling valve; 12. Quick release buckle; 13. Connecting hole; 14. Sealing plate; 15. Second cylinder; 16. First scraper; 17. Flexible scraper brush; 18. Second scraper; 19. Elastic expansion member; 20. Negative pressure cavity; 21. Negative pressure fan. DETAILED DESCRIPTION

[0031] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0032] Example 1

[0033] like Figure 1 As shown, this embodiment includes a sampling tube 1, one end of the sampling tube 1 is used to be fixed on the side wall of the caustic soda hopper 2, and the other end is fixedly provided with a closed bottom plate 3. A sampling rod 4 is provided in the sampling tube 1, and one end of the sampling rod 4 slides through and extends out of the closed bottom plate 3 and is coaxially connected to the output end of the first cylinder 5. The first cylinder 5 is used to drive the sampling rod 4 to insert into the caustic soda hopper 2; a sampling groove 6 is provided on the side wall of the sampling rod 4 away from the end of the first cylinder 5, and the first cylinder 5 is connected to the servo motor. The output shaft of the machine 7 is connected in a transmission manner, and the servo motor 7 is fixed to the periphery of the flake caustic soda hopper 2 through a mounting bracket, and is used for axial rotation driven by the servo motor 7; a sampling port 8 is provided on the bottom side of the sampling tube 1, and a sampling cavity 9 is connected to the sampling port 8. The bottom of the sampling cavity 9 is detachably connected to a sampling bottle 10, and the side wall of the sampling cavity 9 is connected to a negative pressure suction mechanism; a scraping mechanism for scraping the flake caustic soda in the sampling groove 6 is provided at one end of the sampling tube 1 connected to the flake caustic soda hopper 2.

[0034] In order to facilitate the flake caustic soda collected by the sampling groove 6 to fall into the sampling bottle 10, the sampling port 8 preferably adopts a funnel-shaped structure.

[0035] In this embodiment, a sampling valve 11 is provided at the sampling port 8. One end of the sampling valve 11 is connected to the sampling port 8, and the other end is connected to the sampling cavity 9. The setting of the sampling valve 11 can seal and isolate the space in the sampling tube 1 after the sampling is completed, thereby ensuring the sealing of the sampling tube 1 and preventing the external environment from affecting the sampling.

[0036] The bottom opening of the sampling cavity 9 is fixedly connected with a quick-release buckle 12, and the sampling bottle 10 is detachably fixedly connected with the quick-release buckle 12, so that the quick-release buckle 12 can conveniently disassemble and assemble the sampling bottle 10.

[0037] In the embodiment, the negative pressure suction mechanism comprises a negative pressure cavity 20 and a negative pressure fan 21 installed in the negative pressure cavity 20, one end of the negative pressure cavity 20 is communicated with the side wall of the sampling cavity 9, and the other end of the negative pressure cavity 20 is communicated with a recovery container.

[0038] In the embodiment, the side wall of the flake caustic soda hopper 2 is provided with a communication hole 13 for the sampling rod 4 to pass through, and the two ends of the sampling rod 4 are provided with blocking mechanisms for blocking the communication hole 13, so that the blocking mechanisms at the two ends of the sampling rod 4 can prevent the flake caustic soda in the flake caustic soda hopper 2 from being sucked when the negative pressure suction mechanism sucks the residual flake caustic soda in the sampling tube 1, and at the same time, the blocking mechanism close to the flake caustic soda hopper 2 can isolate the flake caustic soda hopper 2 and the sampling tube 1 after sampling, so as to prevent the flake caustic soda in the flake caustic soda hopper 2 from entering the sampling tube 1 when no sampling is performed.

[0039] In the embodiment, the scraping mechanism comprises a second cylinder 15 and a first scraper 16, the second cylinder 15 is arranged vertically below one end of the sampling tube 1 connected with the flake caustic soda hopper 2, the output end of the second cylinder 15 is fixedly connected with the first scraper 16 for driving the first scraper 16 to extend into the sampling groove 6, the first scraper 16 is in sliding sealing connection with the side wall of the sampling tube 1, and the upper portion of the first scraper 16 is matched with the cross-sectional shape of the sampling groove 6.

[0040] Working principle: The utility model is a timed sampling, and the sampling cycle is customized according to the number of bags discharged by the packaging machine PLC. After the sampler of the utility model receives the sampling signal, before the sampling rod 4 is inserted into the caustic soda hopper 2, the second cylinder 15 extends the first scraper 16 into the sampling tank 6, and the first cylinder 5 starts to insert the sampling rod 4 into the caustic soda hopper 2. In the process of the sampling rod 4 entering the caustic soda hopper 2, the first scraper 16 scrapes off the residual caustic soda in the sampling tank 6, and then the second cylinder 15 retracts the first scraper 16. The cylindrical mechanism at one end of the sampling rod 4 close to the first cylinder 5 seals the connecting hole 13, opens the sampling valve 11, and starts the negative pressure blower 21 to remove the residual caustic soda in the sampling tube 1 and the residual caustic soda in the sampling bottle 10. The residual flake caustic soda is extracted and recovered into the recovery container; the sampling valve 11 is closed, and the servo motor 7 drives the first cylinder 5 and the sampling rod 4 to rotate 180 degrees, so that the sampling slot 6 extending into the flake caustic soda hopper 2 is set upward. After standing for a period of time, the first cylinder 5 retracts the sampling rod 4, so that the cylindrical mechanism at one end of the sampling rod 4 away from the first cylinder 5 seals the communicating hole 13, and the sampling valve 11 is opened. The servo motor 7 drives the first cylinder 5 and the sampling rod 4 to rotate 180 degrees, so that the opening of the sampling slot 6 is set downward, and the flake caustic soda therein is poured into the sampling bottle 10 to complete the sampling.

[0041] Example 2

[0042] like Figure 2 As shown, this embodiment includes a sampling tube 1, one end of the sampling tube 1 is used to be fixed on the side wall of the caustic soda hopper 2, and the other end is fixedly provided with a closed bottom plate 3. A sampling rod 4 is provided in the sampling tube 1, and one end of the sampling rod 4 slides through and extends out of the closed bottom plate 3 and is coaxially connected to the output end of the first cylinder 5. The first cylinder 5 is used to drive the sampling rod 4 to insert into the caustic soda hopper 2; a sampling groove 6 is provided on the side wall of the sampling rod 4 away from the end of the first cylinder 5, and the first cylinder 5 is connected to the servo motor. The output shaft of the machine 7 is connected in a transmission manner, and the servo motor 7 is fixed to the periphery of the flake caustic soda hopper 2 through a mounting bracket, and is used for axial rotation driven by the servo motor 7; a sampling port 8 is provided on the bottom side of the sampling tube 1, and a sampling cavity 9 is connected to the sampling port 8. The bottom of the sampling cavity 9 is detachably connected to a sampling bottle 10, and the side wall of the sampling cavity 9 is connected to a negative pressure suction mechanism; a scraping mechanism for scraping the flake caustic soda in the sampling groove 6 is provided at one end of the sampling tube 1 connected to the flake caustic soda hopper 2.

[0043] In order to facilitate the flake caustic soda collected by the sampling groove 6 to fall into the sampling bottle 10, the sampling port 8 preferably adopts a funnel-shaped structure.

[0044] In the embodiment, the sampling port 8 is provided with a sampling valve 11, one end of the sampling valve 11 is communicated with the sampling port 8, and the other end is communicated with the sampling cavity 9. The sampling valve 11 is arranged to seal the space in the sampling tube 1 after sampling is completed, to ensure the sealing of the sampling tube 1, and to avoid the influence of the external environment on sampling.

[0045] The bottom opening of the sampling cavity 9 is fixedly connected with a quick-release buckle 12, and the sampling bottle 10 is detachably fixedly connected with the quick-release buckle 12. The quick-release buckle 12 can facilitate disassembly and assembly of the sampling bottle 10.

[0046] In the embodiment, the negative pressure suction mechanism includes a negative pressure cavity 20 and a negative pressure fan 21 installed in the negative pressure cavity 20. One end of the negative pressure cavity 20 is communicated with the side wall of the sampling cavity 9, and the other end of the negative pressure cavity 20 is communicated with a recovery container. The negative pressure suction mechanism adopts the negative pressure cavity 20 provided with the negative pressure fan 21, and has a simple structure.

[0047] In the embodiment, the side wall of the flake caustic soda hopper 2 is provided with a communication hole 13 for the sampling rod 4 to pass through. The two ends of the sampling rod 4 are provided with blocking mechanisms for blocking the communication hole 13. The blocking mechanisms at the two ends of the sampling rod 4 can prevent flake caustic soda in the flake caustic soda hopper 2 from being sucked when the negative pressure suction mechanism sucks the residual flake caustic soda in the sampling tube 1. After sampling is completed, the blocking mechanism close to the flake caustic soda hopper 2 can isolate the flake caustic soda hopper 2 and the sampling tube 1, to avoid flake caustic soda in the flake caustic soda hopper 2 from entering the sampling tube 1 when sampling is not performed.

[0048] Specifically, the blocking mechanism includes blocking plates 14. The two blocking plates 14 are fixedly and spacedly arranged on the sampling rod 4. The sampling groove 6 is arranged between the two blocking plates 14. The blocking mechanism adopts the blocking plates 14, and the blocking plates 14 are used to block the communication hole 13, and the structure is simple.

[0049] In the embodiment, the scraping mechanism includes a second air cylinder 15 and a first scraper 16. The second air cylinder 15 is arranged vertically below one end of the sampling tube 1 connected to the flake caustic soda hopper 2. The output end of the second air cylinder 15 is fixedly connected with the first scraper 16 for driving the first scraper 16 to extend into the sampling groove 6. The upper part of the first scraper 16 matches the cross-sectional shape of the sampling groove 6. The second air cylinder 15 pushes the first scraper 16, so that the upper part of the first scraper 16 is inserted into the sampling groove 6. In the case of linear motion of the sampling rod 4, the flake caustic soda remaining on the inner wall of the sampling groove 6 is scraped off. Then, the second air cylinder 15 drives the first scraper 16 to retract and exit the sampling groove 6, without affecting the continuous linear motion and rotation of the sampling rod 4.

[0050] Working principle: the utility model discloses timing sampling, and the sampling period is defined according to the packaging machine PLC bag number.The utility model sampler receives sampling signal, and before sampling rod 4 stretches into caustic soda hopper 2, second cylinder 15 stretches first scraper 16 into sampling groove 6, and first cylinder 5 starts and stretches sampling rod 4 into caustic soda hopper 2, in the process that sampling rod 4 enters caustic soda hopper 2, first scraper 16 scrapes the residual caustic soda in sampling groove 6, then second cylinder 15 retracts first scraper 16, and the blocking plate 14 of one end of sampling rod 4 close to first cylinder 5 realizes the sealing of communication hole 13, opens sampling valve 11, and negative pressure fan 21 starts, and the residual caustic soda in sampling tube 1 and the residual caustic soda in sampling bottle 10 are extracted and recycled to recovery container, closes sampling valve 11 door, and servo motor 7 drives first cylinder 5 and sampling rod 4 to rotate 180 degrees, so that the sampling groove 6 that stretches into caustic soda hopper 2 is arranged upwards, after a period of time, first cylinder 5 retracts sampling rod 4, so that the blocking plate 14 of one end of sampling rod 4 away from first cylinder 5 realizes the sealing of communication hole 13, opens sampling valve 11 door, and servo motor 7 drives first cylinder 5 and sampling rod 4 to rotate 180 degrees, so that the opening of sampling groove 6 is arranged downwards, and the caustic soda in it is poured into sampling bottle 10, and sampling is completed.

[0051] Example three

[0052] As Figure 3 shown, the utility model discloses sampling tube 1, one end of sampling tube 1 is used for fixing on the lateral wall of caustic soda hopper 2, and the other end is fixed with closed bottom plate 3, sampling rod 4 is arranged in sampling tube 1, one end of sampling rod 4 slides through and stretches out closed bottom plate 3 and is coaxially connected with the output end of first cylinder 5, and first cylinder 5 is used for driving sampling rod 4 to insert caustic soda hopper 2, the lateral wall of one end of sampling rod 4 away from first cylinder 5 is equipped with sampling groove 6, first cylinder 5 is transmission connection with the output shaft of servo motor 7, is used for rotating axially under the driving of servo motor 7, and servo motor 7 is fixed on the periphery of caustic soda hopper 2 through mounting bracket, sampling port 8 is arranged on the bottom side of sampling tube 1, sampling cavity 9 is connected at sampling port 8, sampling bottle 10 is detachably communicated at the bottom of sampling cavity 9, and negative pressure suction mechanism is communicated on the lateral wall of sampling cavity 9, one end of sampling tube 1 connected caustic soda hopper 2 is equipped with scraping mechanism for scraping caustic soda in sampling groove 6.

[0053] In order to facilitate the caustic soda collected in sampling groove 6 to fall into sampling bottle 10, sampling port 8 preferably adopts funnel structure.

[0054] In the embodiment, the sampling port 8 is provided with a sampling valve 11, one end of the sampling valve 11 is communicated with the sampling port 8, and the other end is communicated with the sampling cavity 9. The sampling valve 11 can seal the space in the sampling tube 1 after sampling, ensure the sealing of the sampling tube 1, and avoid the influence of the external environment on sampling.

[0055] The bottom opening of the sampling cavity 9 is fixedly connected with a quick-release buckle 12, and the sampling bottle 10 is detachably fixedly connected with the quick-release buckle 12. The quick-release buckle 12 can facilitate disassembly and assembly of the sampling bottle 10.

[0056] In the embodiment, the negative pressure suction mechanism includes a negative pressure cavity 20 and a negative pressure fan 21 installed in the negative pressure cavity 20. One end of the negative pressure cavity 20 is communicated with the side wall of the sampling cavity 9, and the other end of the negative pressure cavity 20 is communicated with a recovery container. The negative pressure suction mechanism adopts the negative pressure cavity 20 provided with the negative pressure fan 21, and has a simple structure.

[0057] In the embodiment, the side wall of the flake caustic pot 2 is provided with a communication hole 13 for the sampling rod 4 to pass through. The two ends of the sampling rod 4 are provided with a plugging mechanism for plugging the communication hole 13. The plugging mechanism at the two ends of the sampling rod 4 can prevent the flake caustic in the flake caustic pot 2 from being sucked when the negative pressure suction mechanism sucks the residual flake caustic in the sampling tube 1. After sampling, the plugging mechanism close to the flake caustic pot 2 can isolate the flake caustic pot 2 and the sampling tube 1, so that the flake caustic in the flake caustic pot 2 does not enter the sampling tube 1. Specifically, the communication hole 13 is a circular hole, and the two ends of the sampling rod 4 are cylindrical structures with the same diameter as the inner diameter of the communication hole 13. The cylindrical structure and the circular hole are in sliding seal to form the plugging mechanism. The two ends of the sampling rod 4 adopt the cylindrical structure with the same diameter as the inner diameter of the communication hole 13, and the communication hole 13 is plugged in a sliding seal manner. The sampling rod 4 has a simpler structure.

[0058] The scraping mechanism includes a flexible scraper 17, and the bottom end of the flexible scraper 17 is fixed to the bottom inner wall of the sampling tube 1. The scraping mechanism adopts the flexible scraper 17, which has a simple structure and does not affect the linear motion and rotation of the sampling rod 4.

[0059] Working principle: the utility model discloses timing sampling, and the sampling period is defined according to the packaging machine PLC blanking bag number.The utility model sampler receives sampling signal, and before sampling rod 4 stretches into sheet alkali hopper 2, flexible scraper 17 stretches into sampling groove 6, and first cylinder 5 starts and stretches sampling rod 4 into sheet alkali hopper 2, in the process that sampling rod 4 enters sheet alkali hopper 2, flexible scraper 17 scrapes the residual sheet alkali in sampling groove 6, and the cylindrical mechanism of the one end of sampling rod 4 close to first cylinder 5 realizes the sealing of communication hole 13, opens sampling valve 11, and negative pressure fan 21 starts, and the residual sheet alkali in sampling tube 1 and the residual sheet alkali in sampling bottle 10 are extracted and recycled to the recycling container, closes sampling valve 11 door, and servo motor 7 drives first cylinder 5 and sampling rod 4 to rotate 180 degrees, so that sampling groove 6 that stretches into sheet alkali hopper 2 is arranged upwards, after a period of time, first cylinder 5 withdraws sampling rod 4, so that the cylindrical mechanism of the one end of sampling rod 4 far from first cylinder 5 realizes the sealing of communication hole 13, opens sampling valve 11 door, and servo motor 7 drives first cylinder 5 and sampling rod 4 to rotate 180 degrees, so that sampling groove 6 is arranged downwards, and the sheet alkali in it is poured into sampling bottle 10, and sampling is completed.

[0060] Example four

[0061] As Figure 4 shown, the utility model discloses sampling tube 1, one end of sampling tube 1 is used for fixing on the lateral wall of sheet alkali hopper 2, the other end is fixedly provided with closed bottom plate 3, sampling rod 4 is arranged in sampling tube 1, one end of sampling rod 4 slides through and stretches out closed bottom plate 3 and is coaxially connected with the output end of first cylinder 5, and first cylinder 5 is used for driving sampling rod 4 to insert sheet alkali hopper 2, the lateral wall of the one end of sampling rod 4 far from first cylinder 5 is equipped with sampling groove 6, first cylinder 5 is transmission connection with the output shaft of servo motor 7, is used for rotating axially under the driving of servo motor 7, and servo motor 7 is fixed on the periphery of sheet alkali hopper 2 through mounting bracket, sampling port 8 is arranged on the bottom side of sampling tube 1, sampling cavity 9 is connected at sampling port 8, sampling bottle 10 is detachably communicated at the bottom of sampling cavity 9, and negative pressure suction mechanism is communicated on the lateral wall of sampling cavity 9, one end of sampling tube 1 connected sheet alkali hopper 2 is equipped with scraping mechanism for scraping the sheet alkali in sampling groove 6.

[0062] In order to facilitate the sheet alkali collected in sampling groove 6 to fall into sampling bottle 10, sampling port 8 preferably adopts funnel structure.

[0063] In this embodiment, a sampling valve 11 is provided at the sampling port 8. One end of the sampling valve 11 is connected to the sampling port 8, and the other end is connected to the sampling cavity 9. The setting of the sampling valve 11 can seal and isolate the space in the sampling tube 1 after the sampling is completed, thereby ensuring the sealing of the sampling tube 1 and preventing the external environment from affecting the sampling.

[0064] A quick-release buckle 12 is fixedly connected to the bottom opening of the sampling cavity 9 , and the sampling bottle 10 is detachably fixedly connected to the quick-release buckle 12 . The quick-release buckle 12 can facilitate the disassembly and assembly of the sampling bottle 10 .

[0065] In this embodiment, the negative pressure suction mechanism includes a negative pressure cavity 20 and a negative pressure fan 21 installed in the negative pressure cavity 20. One end of the negative pressure cavity 20 is connected to the side wall of the sampling cavity 9, and the other end of the negative pressure cavity 20 is connected to the recovery container. The negative pressure suction mechanism adopts a negative pressure cavity 20 equipped with a negative pressure fan 21, and has a simple structure.

[0066] In this embodiment, a connecting hole 13 for the sampling rod 4 to pass through is provided on the side wall of the flake caustic soda hopper 2, and a blocking mechanism for blocking the connecting hole 13 is provided on both ends of the sampling rod 4. The blocking mechanisms at both ends of the sampling rod 4 can prevent the flake caustic soda in the flake caustic soda hopper 2 from being sucked out when the negative pressure suction mechanism sucks out the residual flake caustic soda in the sampling tube 1. At the same time, after the sampling is completed, the blocking mechanism close to the flake caustic soda hopper 2 can isolate the flake caustic soda hopper 2 and the sampling tube 1, thereby preventing the flake caustic soda in the flake caustic soda hopper 2 from entering the sampling tube 1 when no sampling is performed. Specifically, the connecting hole 13 is a circular hole, and at least both ends of the sampling rod 4 are cylindrical structures with a diameter the same as the inner diameter of the connecting hole 13. The cylindrical structure and the circular hole are slidably sealed to form the blocking mechanism. The two ends of the sampling rod 4 adopt a cylindrical structure with a diameter the same as the inner diameter of the connecting hole 13, and the connecting hole 13 is blocked by a sliding seal, making the structure of the sampling rod 4 simpler.

[0067] The scraping mechanism comprises a second scraper 18 and an elastic telescopic member 19, the bottom of the elastic telescopic member 19 is fixed on the inner wall of the bottom of the sampling tube 1, the top of the elastic telescopic member 19 is fixedly connected with the second scraper 18, the upper part of the second scraper 18 matches the cross-sectional shape of the sampling groove 6, and the two ends of the sampling groove 6 are circular arc transitions.

[0068] In the embodiment, the elastic telescopic member 19 comprises an elastic seat fixed on the inner wall of the bottom of the sampling tube 1, the top of the elastic seat is provided with a containing groove, the second scraper 18 is arranged in the containing groove, a compression spring is arranged between the bottom of the second scraper 18 and the groove bottom of the containing groove, the compression spring exerts an upward force on the second scraper 18, in order to avoid that the second scraper 18 is separated from the containing groove, a guide groove is arranged on the side wall of the containing groove, the top of the guide groove is provided with a limiting block, and a protruding block is fixedly arranged on the bottom side wall of the second scraper 18 and is slidably arranged in the guide groove.

[0069] Working principle: the utility model discloses timing sampling, and the number of blanking bags of packaging machine PLC is customized sampling period.The sampler of the utility model receives sampling signal, and before sampling rod 4 extends into flake alkali hopper 2, elastic expansion piece 19 drives second scraper 18 to extend into sampling groove 6, first cylinder 5 starts and extends sampling rod 4 into flake alkali hopper 2, in the process that sampling rod 4 enters flake alkali hopper 2, second scraper 18 scrapes the residual flake alkali in sampling groove 6, then under the action of arc transition, second scraper 18 is pressed on the outer wall of sampling rod 4 after separating sampling groove 6 along arc transition, the cylindrical mechanism of the end of sampling rod 4 close to first cylinder 5 realizes sealing to communication hole 13, opens sampling valve 11, and negative pressure fan 21 starts, and the residual flake alkali in sampling tube 1 and the residual flake alkali in sampling bottle 10 are extracted and recycled to recovery container, closes sampling valve 11 door, and servo motor 7 drives first cylinder 5 and sampling rod 4 to rotate 180 degrees, so that sampling groove 6 that extends into flake alkali hopper 2 is arranged upwards, after a period of time, first cylinder 5 retracts sampling rod 4, so that the cylindrical mechanism of the end of sampling rod 4 away from first cylinder 5 realizes sealing to communication hole 13, opens sampling valve 11 door, and servo motor 7 drives first cylinder 5 and sampling rod 4 to rotate 180 degrees, so that sampling groove 6 is arranged downwards, and the flake alkali in it is poured into sampling bottle 10, and sampling is completed.

[0070] The utility model scrapes the residual flake alkali in sampling groove 6 before sampling, then extracts and recycles the residual flake alkali through negative pressure suction mechanism, prevents the residual flake alkali from influencing sampling representationality, the utility model carries out automatic sampling under the condition of complete closure, solves the problem that personnel is injured due to the factors such as moisture absorption and insecurity in the process of manual sampling of flake alkali.

[0071] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "peripheral side", "circumferential direction" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated system or element must have a particular orientation, a particular orientation and operation, therefore, it cannot be understood as a limitation on the utility model.

[0072] In the description of the utility model, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0073] In the utility model, unless another definite provision and limitation, the term " install " " link " " connect " " fixed " and so on term should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can pass through intermediate medium indirectly connect, can be two element inside's intercommunication or two element's mutual action relation, unless another definite limitation.For the ordinary skill in the art, can understand the concrete meaning of above-mentioned term in the utility model according to specific circumstances.

[0074] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. Furthermore, the skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0075] The above is only the preferred embodiment of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An automatic closed sampler for caustic soda flakes, characterized in that: The invention comprises a sampling tube (1), one end of the sampling tube (1) is used to be fixed on the side wall of the caustic soda hopper (2), and the other end is fixedly provided with a closed bottom plate (3). A sampling rod (4) is provided in the sampling tube (1), and one end of the sampling rod (4) slides through and extends out of the closed bottom plate (3) and is coaxially connected to the output end of a first cylinder (5). The first cylinder (5) is used to drive the sampling rod (4) to be inserted into the caustic soda hopper (2); a sampling groove (6) is provided on the side wall of the end of the sampling rod (4) away from the first cylinder (5). The first cylinder (5) is in driving connection with the output shaft of the servo motor (7) and is used for axial rotation under the drive of the servo motor (7); a sampling port (8) is provided on the bottom side of the sampling tube (1); a sampling cavity (9) is connected to the sampling port (8); the bottom of the sampling cavity (9) is detachably connected to a sampling bottle (10); the side wall of the sampling cavity (9) is connected to a negative pressure suction mechanism; one end of the sampling tube (1) connected to the flake caustic soda hopper (2) is provided with a scraping mechanism for scraping the flake caustic soda in the sampling trough (6).

2. The automatic closed sampler for caustic soda flakes according to claim 1, characterized in that: A sampling valve (11) is provided at the sampling port (8), one end of the sampling valve (11) is connected to the sampling port (8), and the other end is connected to the sampling cavity (9).

3. The automatic closed sampler for caustic soda flakes according to claim 1, characterized in that: A quick-release buckle (12) is fixedly connected to the bottom opening of the sampling cavity (9), and the sampling bottle (10) is detachably fixedly connected to the quick-release buckle (12).

4. The automatic closed sampler for caustic soda flakes according to claim 1, characterized in that: A connecting hole (13) for the sampling rod (4) to pass through is provided on the side wall of the flake caustic soda hopper (2), and blocking mechanisms for blocking the connecting hole (13) are provided on both ends of the sampling rod (4).

5. The automatic closed sampler for caustic soda flakes according to claim 4, characterized in that: The blocking mechanism comprises a blocking plate (14), two blocking plates (14) are fixedly arranged on the sampling rod (4) at intervals, and the sampling slot (6) is arranged between the two blocking plates (14).

6. The automatic closed sampler for caustic soda flakes according to claim 4, characterized in that: The communicating hole (13) is a circular hole, and at least two ends of the sampling rod (4) are cylindrical structures with the same diameter as the inner diameter of the communicating hole (13). The cylindrical structure and the circular hole are slidably sealed to form the blocking mechanism.

7. The automatic closed sampler for caustic soda flakes according to any one of claims 1 to 6, characterized in that: The scraping mechanism comprises a second cylinder (15) and a first scraper (16); the second cylinder (15) is arranged vertically below one end of the sampling tube (1) connected to the caustic soda hopper (2); the output end of the second cylinder (15) is fixedly connected to the first scraper (16) for driving the first scraper (16) to extend into the sampling trough (6); the upper part of the first scraper (16) matches the cross-sectional shape of the sampling trough (6).

8. The automatic closed sampler for caustic soda flakes according to any one of claims 1 to 6, characterized in that: The scraping mechanism comprises a flexible scraping brush (17), the bottom end of which is fixed on the bottom inner wall of the sampling tube (1).

9. The automatic closed sampler for caustic soda flakes according to claim 6, characterized in that: The scraping mechanism comprises a second scraper (18) and an elastic telescopic member (19), the bottom of the elastic telescopic member (19) is fixed to the bottom inner wall of the sampling tube (1), the top of the elastic telescopic member (19) is fixedly connected to the second scraper (18), the upper part of the second scraper (18) matches the cross-sectional shape of the sampling groove (6), and the two ends of the sampling groove (6) are arc-shaped transitions.

10. The automatic closed sampler for caustic soda flakes according to any one of claims 1 to 6, characterized in that: The negative pressure suction mechanism comprises a negative pressure cavity (20) and a negative pressure fan (21) installed in the negative pressure cavity (20); one end of the negative pressure cavity (20) is connected to the side wall of the sampling cavity (9), and the other end of the negative pressure cavity (20) is connected to a recovery container.

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