Sampling equipment for collagen peptide extraction

Abstract

The invention provides sampling equipment for collagen peptide extraction and relates to the technical field of material sampling, a sampling equipment body comprises a mounting cover, an adjusting mechanism, a butt joint assembly and a supporting mechanism, a supporting frame is welded to the top of the mounting cover, a top plate is integrally formed at the top end of the supporting frame, and the adjusting mechanism is screwed to the lower portion of the top plate; and a motor is installed at the top of the adjusting mechanism, a driving shaft is inserted into the output end of the motor, the top of the butt-joint assembly penetrates upwards from the surface of the mounting cover, and the outer side of the bottom of the butt-joint assembly is sleeved with a sterilization tank. According to the sampling equipment, the adjusting mechanism is adopted to control the butt-joint assembly to rotate along the supporting mechanism at the bottom, so that the obtained sample can reflect the overall parameter condition of the collagen peptide solution stored in the container. The probability that the internal collagen peptide is polluted during sampling can be reduced. And the actual sampling depth can be controlled, so that the content of collagen peptide impurities at different depths can be judged, and the flexibility is higher.

Description

Technical Field

[0001] The invention relates to the technical field of material sampling, in particular to a sampling device for extracting collagen peptides. Background Art

[0002] Collagen peptides are a type of low-molecular product produced through extraction, hydrolysis, and refinement of fresh animal tissues rich in collagen (such as skin, bones, tendons, skeletal muscles, scales, etc.). Their relative molecular mass is usually less than 10,000 Da1. The production and extraction process of collagen peptides includes multiple steps, and during the storage process after the production and extraction, sampling equipment is often required to sample and test the liquid collagen peptides after production to determine the quality of the current collagen peptides.

[0003] In the prior art, the sampling device used after collagen peptide extraction is directly inserted into the container storing a large amount of collagen peptide solution through a pipeline, and a small amount of collagen peptide can be taken out by suction. However, this solution requires the external pipeline to be inserted into the interior, and the fixed pipeline can only be connected to a fixed position in the product, resulting in the sampling point being fixed and unable to be changed. Therefore, the obtained sample cannot reflect the average parameters of the collagen peptides in the entire container. The use of a detachable and removable pipeline to manually adjust the insertion point will cause the internal solution to indirectly contact a large area of ​​the external environment due to the need to frequently draw out the pipeline, thereby increasing the probability of contamination of the collagen peptides stored inside. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a sampling device for collagen peptide extraction to solve the problems raised in the above-mentioned background technology. The present invention can evenly sample from different positions of the extracted collagen peptide product and reduce the contamination of the internal product during sampling. Each time the sample is taken, the part that will come into contact with the solution over a large area can be sterilized and disinfected.

[0005] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical scheme: a sampling device for extracting collagen peptides, comprising a sampling device body, the sampling device body comprising a mounting cover, an adjustment mechanism, a docking assembly and a supporting mechanism, a supporting frame is welded on the top of the mounting cover, a top plate is integrally formed on the top of the supporting frame, the adjustment mechanism is screwed under the top plate, a motor is installed on the top of the adjustment mechanism, a driving shaft is inserted into the output end of the motor, the top of the docking assembly passes upward from the surface of the mounting cover, a sterilization tank is sleeved on the outer side of the bottom of the docking assembly, a sliding sheet is integrally formed on the bottom of the sterilization tank, the supporting mechanism is installed inside the collagen peptide storage tank, a sampling assembly is inserted inside the docking assembly, and the docking assembly is embedded into the interior of the supporting mechanism through the sliding sheet at the bottom, and the mounting cover is screwed on the top of the collagen peptide storage tank as a whole.

[0006] Furthermore, a center plate is screwed to the bottom of the motor housing, a first rotation groove is provided between the center plate and the inner side of the mounting cover, a rotating ring is embedded in the first rotation groove, and a top docking hole is provided on the surface of the rotating ring.

[0007] Furthermore, the rotating ring has a double-layer structure as a whole, and a slot is provided on the side of the rotating ring. The rotating ring is clamped on the surface of the mounting cover through the slot. A partition is integrally formed on the inner side of the rotating ring. The drive shaft passes through the middle position of the partition, and the drive shaft and the partition are welded and fixed.

[0008] Furthermore, the support mechanism comprises an outer support ring and an inner support ring, and a second rotation groove is provided between the outer support ring and the inner support ring, and interlayers are provided on the sides of the outer support ring and the inner support ring.

[0009] Furthermore, a protrusion is integrally formed on the surface of the outer support ring, a threaded rod is passed through the surface of the protrusion, an extrusion plate is installed at the end of the threaded rod, and the end of the threaded rod is embedded in the surface of the extrusion plate through a sleeved bearing, and the extrusion plate is used to lean against the inner wall of the collagen peptide storage tank.

[0010] Furthermore, the number of the extrusion plates, protrusions and threaded rods is four, and the other end of each threaded rod is integrally formed with a locking knob, and the central axis of the outer support ring and the inner support ring coincides with the central axis of the mounting cover.

[0011] Furthermore, the docking assembly includes a sterilization tank, a pull rod and a sampling assembly, the end of the drive shaft is welded and fixed to the surface of the sterilization tank, a through hole is opened on the top of the sterilization tank, the pull rod passes through the inside of the through hole, and a handle is integrally formed on the top of the pull rod.

[0012] Furthermore, the pull rod passes through the top docking hole, the sliding sheet is embedded in the interlayer, the sterilization tank as a whole rotates around the driving shaft, and the interior of the sterilization tank is screwed with an ultraviolet disinfection device.

[0013] Furthermore, the sampling assembly includes an outer sleeve and a sampling sleeve, the bottom of the outer sleeve is welded with a base plate, the surface of the base plate is welded with a guide rod, the surface of the guide rod is sleeved with a spring, the bottom of the sterilization tank is provided with a hole with the same diameter as the surface of the outer sleeve, the guide rod passes through the bottom of the sterilization tank, and the two ends of the spring are respectively connected to the bottom of the sterilization tank and the base plate.

[0014] Furthermore, an inner sealing plate is welded to the top of the sampling sleeve, and an outer sealing plate and a sealing block are welded to the bottom end of the pull rod. The outer sealing plate is pressed on the surface of the inner sealing plate, and the surface of the inner sealing plate is provided with an inner docking hole, and the surface of the outer sealing plate is provided with an outer docking hole. A discharge hole is provided at the bottom of the side of the sampling sleeve, and a positioning column is integrally formed at the bottom of the sampling sleeve. The bottom end of the inner wall of the outer sleeve is provided with two grooves of the same size as the positioning column.

[0015] Beneficial effects of the present invention:

[0016] 1. The sampling device for extracting collagen peptides adopts an adjustment mechanism to control the docking component to rotate along the bottom support mechanism, so that the sampling component inside the docking component can be controlled to move downward, and uniform sampling is performed from different positions of the extracted collagen peptide product, so that the obtained samples can reflect the overall parameters of the collagen peptide solution stored in the container.

[0017] 2. In the sampling assembly of the collagen peptide extraction sampling device, through the double-layer sleeve structure, only the sampling sleeve used to store the sample can be taken out, and the outer sleeve part can seal and wrap the surface of the sampling sleeve during the sampling process, which means that most areas of the sampling sleeve that are frequently exposed to the outside air will not directly contact the collagen peptide liquid, thereby greatly reducing the probability of internal collagen peptides being contaminated during sampling.

[0018] 3. The sampling device for extracting collagen peptides can control whether to fill the liquid and the lifting process by manually controlling the pull rod to rotate and lift it in the sampling assembly, thereby achieving the effect of being able to control the actual sampling depth, so as to determine the impurity content of collagen peptides at different depths. It has higher flexibility, and the discharge process of the taken out samples can also be completed by rotating the pull rod, and the discharge process is also fast and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1A schematic structural diagram of the appearance of a sampling device for extracting collagen peptides according to the present invention;

[0020] Figure 2 It is a structural schematic diagram of the installation cover part of the present invention;

[0021] Figure 3 It is a structural diagram of the rotating ring part of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the supporting mechanism part of the present invention;

[0023] Figure 5 It is a structural schematic diagram of the docking assembly part of the present invention;

[0024] Figure 6 This is a disassembled diagram of the sampling assembly of the present invention;

[0025] Figure 7 This is an internal exploded view of the sampling sleeve of the present invention;

[0026] In the figure: 1, mounting cover; 2, adjustment mechanism; 3, support mechanism; 4, docking assembly; 5, support frame; 6, top plate; 7, motor; 8, center plate; 9, first rotating groove; 10, rotating ring; 11, card slot; 12, top docking hole; 13, driving shaft; 14, partition; 15, outer support ring; 16, inner support ring; 17, second rotating groove; 18, interlayer; 19, bump; 20, threaded rod; 21, Extrusion plate; 22. Locking knob; 23. Sterilization tank; 24. Through hole; 25. Sliding sheet; 26. Pull rod; 27. Handle; 28. Sampling assembly; 29. ​​Outer sleeve; 30. Bottom plate; 31. Guide rod; 32. Spring; 33. Sampling sleeve; 34. Discharge hole; 35. Positioning column; 36. Outer sealing plate; 37. Outer docking hole; 38. Sealing block; 39. Inner sealing plate; 40. Inner docking hole. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0028] See also Figures 1 to 7The present invention provides the following technical solutions: a sampling device for extracting collagen peptides, comprising a sampling device body, the sampling device body comprising a mounting cover 1, an adjusting mechanism 2, a docking assembly 4 and a supporting mechanism 3, a supporting frame 5 is welded on the top of the mounting cover 1, a top plate 6 is formed integrally on the top of the supporting frame 5, the adjusting mechanism 2 is screwed under the top plate 6, a motor 7 is installed on the top of the adjusting mechanism 2, a driving shaft 13 is inserted at the output end of the motor 7, the top of the docking assembly 4 passes upward from the surface of the mounting cover 1, and the docking assembly 4 passes upward from the surface of the mounting cover 1. A sterilization tank 23 is sleeved on the outer side of the bottom of the component 4, and a sliding sheet 25 is integrally formed on the bottom of the sterilization tank 23. The support mechanism 3 is installed inside the collagen peptide storage tank. A sampling component 28 is inserted into the interior of the docking component 4, and the docking component 4 is embedded into the interior of the support mechanism 3 through the sliding sheet 25 at the bottom. The mounting cover 1 is integrally screwed to the top of the collagen peptide storage tank. The sampling device for collagen peptide extraction is mounted on a tank body storing a collagen peptide solution, and the collagen peptide solution inside the tank body is regularly sampled for use.

[0029] When the present invention is used, the installation is fixed on the top of the collagen peptide storage tank by using bolts, and the supporting mechanism 3 below is installed inside the collagen peptide storage tank, above the collagen peptide solution. When sampling is needed later, the adjustment mechanism 2 at the top is controlled to drive the docking assembly 4 at the bottom to rotate and move it to the area where sampling is needed. At this time, the pull rod 26 can be manually pressed downward to move the outer sleeve 29 inside the docking assembly 4 downward until the outer sleeve 29 is embedded under the collagen peptide solution, so that the collagen peptide solution can enter the interior of the sampling sleeve 33. Subsequently, the sampling sleeve 33 can be taken out by directly pulling the handle 27 to complete the sampling process. When sampling is performed multiple times, the bottom docking assembly 4 is driven to move to different positions of the collagen peptide by controlling the adjustment mechanism 2 respectively, and multiple sampling is performed to evenly obtain collagen peptide solution samples at different positions.

[0030] In this embodiment, a center plate 8 is screwed to the bottom of the housing of the motor 7, a first rotating groove 9 is provided between the center plate 8 and the inner side of the mounting cover 1, a rotating ring 10 is embedded inside the first rotating groove 9, and a top docking hole 12 is provided on the surface of the rotating ring 10. The rotating ring 10 is a double-layer structure as a whole, and a card slot 11 is provided on the side of the rotating ring 10. The rotating ring 10 is clamped on the surface of the mounting cover 1 through the card slot 11. A partition 14 is integrally formed on the inner side of the rotating ring 10, and the drive shaft 13 passes through the middle position of the partition 14, and the drive shaft 13 and the partition 14 are welded and fixed. The adjustment mechanism 2 is used to control the docking assembly 4 to rotate along the bottom support mechanism 3, so that the sampling assembly 28 inside the docking assembly 4 can be controlled to move downward, and uniform sampling is performed from different positions in the extracted collagen peptide product, so that the obtained sample can reflect the overall parameters of the collagen peptide solution stored in the container.

[0031] Specifically, the motor 7 is installed and fixed through the top plate 6 and the support frame 5. After starting the motor 7, the bottom driving shaft 13 can be directly controlled to rotate. The driving shaft 13 can simultaneously drive the partition 14 and the docking assembly 4 below to rotate, thereby using the rotating ring 10 on the side of the partition 14 to change the position of the top docking hole 12, and at the same time change the position of the through hole 24 on the bottom docking assembly 4. Therefore, the entire pull rod 26 can be aligned with different positions of the collagen peptide solution below with the driving effect of the adjustment mechanism 2, thereby realizing the subsequent sampling process at multiple positions.

[0032] In this embodiment, the support mechanism 3 includes an outer support ring 15 and an inner support ring 16, and a second rotation groove 17 is provided between the outer support ring 15 and the inner support ring 16, and a sandwich 18 is provided on the sides of the outer support ring 15 and the inner support ring 16. The surface of the outer support ring 15 is integrally formed with a protrusion 19, and a threaded rod 20 is penetrated from the surface of the protrusion 19. An extrusion plate 21 is installed at the end of the threaded rod 20, and the end of the threaded rod 20 is embedded in the surface of the extrusion plate 21 through a sleeve bearing, and the extrusion plate 21 is used to lean against the inner wall of the collagen peptide storage tank. The number of the extrusion plate 21, the protrusion 19 and the threaded rod 20 is four, and the other end of each threaded rod 20 is integrally formed with a locking knob 22, and the central axis of the outer support ring 15 and the inner support ring 16 coincides with the central axis of the mounting cover 1.

[0033] Specifically, by turning the locking knob 22, the threaded column can be controlled to extend, and finally, with the help of the supporting effect of the threaded column, multiple extrusion plates 21 are pressed against the inner wall of the collagen peptide storage tank, thereby achieving fixed support for the entire support mechanism 3, ensuring that the support mechanism 3 can be stably located above the collagen peptide solution, and providing a guiding effect for the rotation of the subsequent docking component 4. The subsequent docking component 4 always rotates along the inside of the second rotating groove 17, so that it can be aligned with different solutions of the collagen peptide solution below, and one side between the outer support ring 15 and the inner support ring 16 is integrally formed, so that the adjustment mechanism 2 can change the position of the docking component 4 through reciprocating motion.

[0034] In this embodiment, the docking assembly 4 includes a sterilization tank 23, a pull rod 26 and a sampling assembly 28. The end of the drive shaft 13 is welded and fixed to the surface of the sterilization tank 23. A through hole 24 is provided on the top of the sterilization tank 23. The pull rod 26 passes through the inside of the through hole 24, and a handle 27 is integrally formed on the top of the pull rod 26. The pull rod 26 passes through the inside of the top docking hole 12, and the sliding sheet 25 is embedded in the inside of the interlayer 18. The sterilization tank 23 rotates around the drive shaft 13 as a whole, and an ultraviolet disinfection device is screwed inside the sterilization tank 23. The sampling assembly 28 includes an outer sleeve 29 and a sampling sleeve 33. A bottom plate 30 is welded to the bottom of the outer sleeve 29, and a guide rod 31 is welded to the surface of the bottom plate 30. A spring 32 is sleeved on the surface of the guide rod 31. A hole with the same diameter as the surface of the outer sleeve 29 is opened at the bottom of the sterilization tank 23. The guide rod 31 passes through the bottom of the sterilization tank 23, and the two ends of the spring 32 are respectively connected to the bottom of the sterilization tank 23 and the bottom plate 30. An inner sealing plate 39 is welded to the top of the sampling sleeve 33, and an outer sealing plate 36 and a sealing block 38 are welded to the bottom end of the pull rod 26. The outer sealing plate 36 is pressed on the surface of the inner sealing plate 39, and an inner docking hole 40 is opened on the surface of the inner sealing plate 39, and an outer docking hole 37 is opened on the surface of the outer sealing plate 36. A discharge hole 34 is opened at the bottom of the side of the sampling sleeve 33, and a positioning column 35 is integrally formed at the bottom of the sampling sleeve 33. The bottom end of the inner wall of the outer sleeve 29 is provided with two grooves of the same size as the positioning column 35.

[0035] In the sampling component 28, through the double-layer sleeve structure, only the sampling sleeve 33 used to store the sample can be taken out, and the outer sleeve 29 part can seal and wrap the surface of the sampling sleeve 33 during the sampling process, so that most areas of the sampling sleeve 33 that are frequently exposed to the outside air will not directly contact the collagen peptide liquid, thereby greatly reducing the probability of the internal collagen peptides being contaminated during sampling.

[0036] Specifically, the outer sleeve 29 is pulled by the spring 32 in the initial state and is embedded in the top sterilization tank 23, and is sterilized by the inner ultraviolet disinfection lamp in the sterilization tank 23. Only after the top pull rod 26 passes the sampling sleeve 33 at the end through the through hole 24 and is embedded in the outer sleeve 29, the outer sleeve 29 can be pressed downward until both the outer sleeve 29 and the sampling sleeve 33 are embedded in the collagen peptide solution, and the top handle 27 is turned to control the outer sleeve 29 to be more stable. The sealing plate 36 rotates until the outer docking hole 37 is aligned with the inner docking hole 40. In this state, the sealing block 38 will block the discharge port at the bottom, so that the external collagen peptide solution can flow into the interior of the sampling sleeve 33 through the two docking holes. After the sampling is completed, the handle 27 can be directly pulled to pull the entire sampling sleeve 33 upward until it is removed from the surface of the mounting cover 1. At this time, the pull rod 26 is rotated again to offset the sealing block 38 from the discharge port, so that the removed sample can be automatically discharged from the discharge port.

[0037] In the sampling component 28, by manually controlling the pull rod 26 to rotate and lift, it is possible to control whether to fill the liquid and the lifting process, thereby achieving the effect of being able to control the actual sampling depth, so as to determine the collagen peptide impurity content at different depths, with higher flexibility, and the discharge process of the taken out sample can also be completed by rotating the pull rod 26, and the discharge process is also fast and efficient.

[0038] Specifically, after the sampling sleeve 33 is embedded into the interior of the outer sleeve 29, it will be embedded into the groove at the bottom of the inner wall of the outer sleeve 29 through the positioning column 35 at the bottom. At this time, the sampling sleeve 33 can press the outer sleeve 29 downward to insert it into the collagen peptide solution. At the same time, with the help of the clamping effect of the positioning column 35, the rotating pull rod 26 can also rotate the two sealing plates relative to each other, thereby controlling the two inner and outer docking holes to be aligned or staggered. Therefore, after the sampling sleeve 33 is embedded to a preset depth, the inner docking hole 40 and the outer docking hole 37 are aligned. At this time, it can be ensured that only the collagen peptides at this depth are sampled and processed. When the sampling sleeve 33 is subsequently taken out, the outer sleeve 29 is also pulled by the spring 32. Therefore, during the entire sampling process, the surface of the sampling sleeve 33 is always embedded in the interior of the outer sleeve. Therefore, the surface of the sampling sleeve 33 will never be in large-area contact with the collagen peptide solution inside the tank body.

[0039] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

[0040] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A sampling device for extracting collagen peptides, comprising a sampling device body, characterized in that: The sampling device body comprises a mounting cover (1), an adjustment mechanism (2), a docking assembly (4) and a support mechanism (3). A support frame (5) is welded to the top of the mounting cover (1), and a top plate (6) is integrally formed at the top of the support frame (5). The adjustment mechanism (2) is screwed to the bottom of the top plate (6). A motor (7) is mounted on the top of the adjustment mechanism (2), and a drive shaft (13) is inserted at the output end of the motor (7). The top of the docking assembly (4) passes upward from the surface of the mounting cover (1). A sterilization tank (23) is sleeved on the outer side of the bottom of the docking assembly (4), and a sliding sheet (25) is integrally formed at the bottom of the sterilization tank (23). The support mechanism (3) is mounted inside the collagen peptide storage tank, and a sampling assembly (28) is inserted inside the docking assembly (4), and the docking assembly (4) is embedded into the inside of the support mechanism (3) through the sliding sheet (25) at the bottom. The mounting cover (1) is screwed to the top of the collagen peptide storage tank as a whole.

2. A sampling device for extracting collagen peptides according to claim 1, characterized in that: A center plate (8) is screwed to the bottom of the housing of the motor (7); a first rotation groove (9) is provided between the center plate (8) and the inner side of the mounting cover (1); a rotation ring (10) is embedded in the interior of the first rotation groove (9); and a top docking hole (12) is provided on the surface of the rotation ring (10).

3. A sampling device for extracting collagen peptides according to claim 2, characterized in that: The rotating ring (10) is of a double-layer structure as a whole, and a clamping groove (11) is provided on the side of the rotating ring (10). The rotating ring (10) is clamped on the surface of the mounting cover (1) through the clamping groove (11). A partition (14) is integrally formed on the inner side of the rotating ring (10), and the driving shaft (13) passes through the middle position of the partition (14), and the driving shaft (13) and the partition (14) are welded and fixed.

4. A sampling device for extracting collagen peptides according to claim 2, characterized in that: The support mechanism (3) comprises an outer support ring (15) and an inner support ring (16), and a second rotation groove (17) is provided between the outer support ring (15) and the inner support ring (16), and interlayers (18) are provided on the sides of the outer support ring (15) and the inner support ring (16).

5. The sampling device for extracting collagen peptides according to claim 4, characterized in that: The surface of the outer support ring (15) is integrally formed with a protrusion (19), and a threaded rod (20) is passed through the surface of the protrusion (19). An extrusion plate (21) is installed at the end of the threaded rod (20), and the end of the threaded rod (20) is embedded in the surface of the extrusion plate (21) through a sleeve bearing. The extrusion plate (21) is used to lean against the inner wall of the collagen peptide storage tank.

6. A sampling device for extracting collagen peptides according to claim 5, characterized in that: The number of the extrusion plate (21), the protrusion (19) and the threaded rod (20) is four, and the other end of each threaded rod (20) is integrally formed with a locking knob (22), and the central axis of the outer support ring (15) and the inner support ring (16) coincides with the central axis of the installation cover (1).

7. The sampling device for extracting collagen peptides according to claim 4, characterized in that: The docking assembly (4) includes a sterilization tank (23), a pull rod (26) and a sampling assembly (28), the end of the drive shaft (13) is welded and fixed to the surface of the sterilization tank (23), a through hole (24) is opened on the top of the sterilization tank (23), the pull rod (26) passes through the inside of the through hole (24), and a handle (27) is integrally formed on the top of the pull rod (26).

8. The sampling device for extracting collagen peptides according to claim 7, characterized in that: The pull rod (26) passes through the top docking hole (12), the sliding sheet (25) is embedded in the interlayer (18), the sterilization tank (23) rotates around the driving shaft (13) as a whole, and an ultraviolet disinfection device is screwed inside the sterilization tank (23).

9. The sampling device for extracting collagen peptides according to claim 8, characterized in that: The sampling assembly (28) comprises an outer sleeve (29) and a sampling sleeve (33); a bottom plate (30) is welded to the bottom of the outer sleeve (29); a guide rod (31) is welded to the surface of the bottom plate (30); a spring (32) is sleeved on the surface of the guide rod (31); a hole having the same diameter as that of the surface of the outer sleeve (29) is provided at the bottom of the sterilization tank (23); the guide rod (31) passes through the bottom of the sterilization tank (23), and the two ends of the spring (32) are respectively connected to the bottom of the sterilization tank (23) and the bottom plate (30).

10. A sampling device for extracting collagen peptides according to claim 9, characterized in that: An inner sealing plate (39) is welded to the top of the sampling sleeve (33), and an outer sealing plate (36) and a sealing block (38) are welded to the bottom end of the pull rod (26). The outer sealing plate (36) is pressed on the surface of the inner sealing plate (39), and the surface of the inner sealing plate (39) is provided with an inner docking hole (40), and the surface of the outer sealing plate (36) is provided with an outer docking hole (37). A discharge hole (34) is provided at the bottom of the side of the sampling sleeve (33), and a positioning column (35) is integrally formed at the bottom of the sampling sleeve (33). The bottom end of the inner wall of the outer sleeve (29) is provided with two grooves of the same size as the positioning column (35).

Images