A sampling inspection agency for yogurt production line

Abstract

This invention relates to the field of yogurt sampling technology and discloses a sampling mechanism for yogurt production line production. The mechanism includes a conveying pipe, a sampling pipe, a stop plate, a one-way plate, an intermediate pipe, and a threaded pipe. A guide rod is slidably connected to a guide hole on the stop plate. The guide rod connects the one-way plate and a top spring. A top plate, an opening / closing plate, an internal spring, and an external spring are arranged outside the intermediate pipe. An air inlet pipe is arranged inside the threaded pipe. Rotating the threaded pipe changes the preload of the internal spring, allowing yogurt pressure to selectively open the one-way plate and complete sampling through the outflow pipe. After sampling, the threaded pipe is rotated in the opposite direction, causing the air inlet pipe to insert into the insertion hole of the opening / closing plate. High-pressure gas and water sequentially open the opening / closing plate, enter the sampling pipe through the air outlet and the air outlet hole on the intermediate pipe, and are discharged through the outflow pipe. This invention completes sampling, air blowing, and water washing sequentially without disassembling the sampling pipe, reducing cross-contamination of subsequent samples by residual yogurt.

Description

Technical Field

[0001] This invention relates to the field of yogurt sampling inspection technology, specifically to a sampling inspection mechanism for yogurt production lines that can perform online sampling during the yogurt production line conveying process and sequentially perform air blowing and water washing after sampling. Background Technology

[0002] Yogurt is usually transported continuously through a closed conveyor pipe before fermentation, preparation, or bottling. In order to control the viscosity, acidity, bacterial colony status, and ingredient uniformity of the yogurt, samples need to be taken periodically for testing during the transportation process. The sampling location must be reliably connected to the yogurt being transported, and must also be kept sealed when not sampling, so as not to affect the normal transportation pressure of the yogurt.

[0003] Existing sampling structures typically use valves to open the sampling branch and close the valves after sampling. However, viscous yogurt easily adheres to the sampling branch, valve core, and outlet inner wall. The next sample flush cannot completely remove the previous residue. The residual yogurt may also change in properties after it has been left for a while, which will cause the next sample to be mixed with the previous residue and affect the test results.

[0004] Some equipment requires manual cleaning of the sampling tube after sampling, or separate gas and cleaning fluid lines to flush the sampling branch. These methods require interrupting the use of the sampling location and adding multiple external valves, resulting in numerous operation steps. Furthermore, the opening and closing parts inside the sampling valve are independent of the cleaning flow path, making it difficult for the cleaning medium to directly flush away the residual internal space after sampling. Therefore, it is necessary to provide a sampling inspection mechanism that can sequentially switch between sealing, sampling, and cleaning states through the same adjustment component. Summary of the Invention

[0005] The purpose of this invention is to provide a sampling inspection mechanism for yogurt production line, so as to solve the problem that yogurt samples are easily left in the sampling tube and the outflow tube after sampling, the disassembly and cleaning efficiency is low, and cross-contamination may occur to the next sample.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a sampling inspection mechanism for yogurt production line, comprising a conveying pipe, an inlet pipe, an outlet pipe and a sampling pipe connected to the conveying pipe, a motor installed on the conveying pipe, a spiral blade connected to the output end of the motor, multiple outlet pipes provided on the outer wall of the sampling pipe, a stop plate provided inside the sampling pipe, a guide hole provided on the stop plate, a guide rod slidably connected inside the guide hole, a one-way disc connected to the lower end of the guide rod, and a top spring for abutting the stop plate provided at the upper end of the guide rod.

[0007] The lower end of the one-way disc is connected to a middle tube, and the lower end of the middle tube is slidably connected to a threaded tube. The threaded tube is threadedly connected to the threaded hole at the lower end of the sampling tube. An internal spring, an opening and closing disc, a top disc, and an external spring are installed outside the middle tube. The top disc abuts against the one-way disc. An air vent is opened on the outer wall of the middle tube. An air inlet is installed inside the threaded tube. An insertion hole is opened on the opening and closing disc. Air vent slits are opened on the mating surfaces of the top disc and the opening and closing disc.

[0008] The outer peripheral wall of the stop disc is fixedly connected to the inner wall of the sampling tube. Multiple guide holes are spaced apart along the circumference of the stop disc. Multiple guide rods are slidably connected in the corresponding guide holes. A one-way disc is located below the stop disc. The lower ends of multiple guide rods are connected to the upper end face of the one-way disc. The upper end of the top spring is connected to the guide rod, and the lower end of the top spring abuts against the upper end face of the stop disc.

[0009] The upper end of the internal spring is connected to the opening and closing disc, and the lower end of the internal spring abuts against the threaded tube. The upper end of the external spring is connected to the opening and closing disc, and the lower end of the external spring is connected to the middle tube. When the threaded tube moves along the threaded hole, it changes the thrust of the internal spring on the opening and closing disc, thereby changing the resultant force transmitted to the top disc and the one-way disc, so that the one-way disc switches between a sealed state and a sampling state that allows the yogurt pressure to open.

[0010] When the threaded tube moves upward to the cleaning position, the air inlet pipe is inserted into the insertion hole on the opening and closing plate. The pressure medium introduced through the air inlet pipe acts on the opening and closing plate. The top plate is restricted from moving upward due to its contact with the one-way plate. The opening and closing plate moves downward against the thrust of the internal and external springs, which opens the air outlet gap between the top plate and the opening and closing plate. The pressure medium enters the sampling tube through the air outlet gap and the air outlet hole on the middle pipe and is discharged from multiple outlet pipes.

[0011] This invention changes the preload of the internal spring by cooperating with the threaded tube and the threaded hole. It can control whether the one-way disc can be opened by the pressure of yogurt without disassembling the sampling tube. This makes the sealing state during normal transportation and the sampling state when sampling is required to have a clear force difference, reducing the possibility of yogurt entering the sampling tube during non-sampling stages.

[0012] The present invention provides an air inlet pipe inside the threaded tube and an insertion hole corresponding to the air inlet pipe on the opening and closing plate. When the threaded tube completes the reverse reset after sampling, it can continue to move to the cleaning position. This allows the same thread adjustment action to both restore the sealing thrust of the one-way plate and establish a passage for the cleaning medium to enter the intermediate tube, reducing the use of external switching valves and independent cleaning branches.

[0013] This invention first utilizes the compressibility and high flow rate of high-pressure gas to blow out most of the yogurt residue in the sampling tube and outflow tube. Then, high-pressure water is introduced along the same flow path to wash away the residue adhering to the inner wall. Both air blowing and water washing flow through the air outlet, air outlet, sampling tube and outflow tube, which can directly clean the space that the actual sampling passes through and reduce cleaning dead corners.

[0014] This invention uses a top spring, an outer spring, and an inner spring to form a sealing thrust under normal conveying conditions. The total thrust can be changed by adjusting only the inner spring through the threaded tube. This retains both the guiding and resetting function of the top spring on the one-way disc and the resetting function of the outer spring on the opening and closing disc, so that the sampling opening and closing and the cleaning opening and closing can cooperate with each other without confusion. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 This is a schematic diagram of the sampling tube and outflow tube of the present invention.

[0017] Figure 3 This is a cross-sectional schematic diagram of the internal structure of the sampling tube of the present invention.

[0018] Figure 4 This is a schematic diagram of the structure of the intermediate tube, threaded tube and elastic element of the present invention.

[0019] Figure 5 This is a schematic diagram of the combined structure of the top plate, the opening and closing plate, and the air intake pipe of the present invention.

[0020] Figure 6 This is a schematic diagram of the structure of the middle tube and the top plate of the present invention.

[0021] Figure 7 This is a schematic diagram of the sampling tube and stop disk of the present invention.

[0022] Figure 8 This is a schematic diagram of the structure of the threaded pipe, air inlet pipe and hexagonal block of the present invention.

[0023] Reference numerals: 1. Conveying pipe; 2. Feed pipe; 3. Discharge pipe; 4. Sampling pipe; 5. Motor; 6. Spiral blade; 7. Outflow pipe; 8. Stop plate; 9. Guide hole; 10. Guide rod; 11. One-way disc; 12. Top spring; 13. Intermediate pipe; 14. Threaded pipe; 15. Threaded hole; 16. Internal spring; 17. Opening / closing disc; 18. Top plate; 19. Air outlet; 20. External spring; 21. Hexagonal block; 22. Air outlet slit; 23. Air inlet pipe; 24. Insertion hole. Detailed Implementation

[0024] like Figures 1 to 8As shown, this embodiment provides a sampling inspection mechanism for yogurt production line. The conveying pipe 1 serves as the main pipeline for continuous yogurt conveying. The feed pipe 2 is connected to one end of the conveying pipe 1, and the discharge pipe 3 is connected to the other end of the conveying pipe 1. Yogurt enters the conveying pipe 1 through the feed pipe 2 and is discharged through the discharge pipe 3. The sampling pipe 4 is connected to one end of the conveying pipe 1 near the discharge pipe 3, so that the sampling position can obtain a yogurt sample after conveying.

[0025] A motor 5 is installed on the conveying pipe 1. The output end of the motor 5 extends into the conveying pipe 1 and is connected to the spiral blade 6. The spiral blade 6 extends along the axial direction of the conveying pipe 1. When the motor 5 drives the spiral blade 6 to rotate, it applies a conveying action towards the discharge pipe 3 to the yogurt entering the conveying pipe 1, so that the yogurt maintains the corresponding flow pressure at the connection position of the sampling pipe 4 and continues to move towards the discharge pipe 3.

[0026] Four outflow tubes 7 are evenly spaced along the circumference on the outer wall of the sampling tube 4. All four outflow tubes 7 are connected to the interior of the sampling tube 4. The outflow tubes 7 are located below the stop plate 8. After the one-way plate 11 is opened, the yogurt entering the sampling tube 4 can flow out from the multiple outflow tubes 7 respectively, so as to receive the sample on the outside of the outflow tubes 7 and shorten the time that the yogurt stays in the sampling tube 4.

[0027] The outer peripheral wall of the stop plate 8 is fixedly connected to the inner wall of the sampling tube 4. The stop plate 8 separates the upper part of the sampling tube 4 that is connected to the delivery tube 1 and the lower part that is connected to the outflow tube 7. Multiple guide holes 9 are provided on the stop plate 8 along the circumferential direction. A guide rod 10 is slidably connected in each guide hole 9, so that the multiple guide rods 10 can move synchronously along the axial direction of the sampling tube 4.

[0028] The lower ends of multiple guide rods 10 are connected to a one-way wheel 11. The one-way wheel 11 is located below the stop disc 8 and can fit against the stop disc 8. A top spring 12 is provided at the upper end of the guide rod 10. The upper end of the top spring 12 is connected to the guide rod 10, and the lower end of the top spring 12 abuts against the upper surface of the stop disc 8. The top spring 12 applies a pushing force toward the stop disc 8 to the one-way wheel 11 through the guide rod 10.

[0029] When the one-way disc 11 is in contact with the stop disc 8, it blocks the flow of yogurt from the delivery pipe 1 to the lower part of the sampling pipe 4. The pressure of the yogurt during delivery acts on the area corresponding to the one-way disc 11 and the stop disc 8. Only when the downward force generated by this pressure is greater than the upward force formed by the combined transmission of the top spring 12, the outer spring 20 and the inner spring 16 will the one-way disc 11 leave the stop disc 8 along the guiding direction of the guide rod 10.

[0030] The lower end of the one-way disc 11 is coaxially connected to the intermediate tube 13. The intermediate tube 13 moves along the axial direction of the sampling tube 4 with the one-way disc 11. The lower end of the intermediate tube 13 is slidably connected to the threaded tube 14, so that the threaded tube 14 can be axially adjusted relative to the intermediate tube 13. At the same time, the intermediate tube 13 can move relative to the threaded tube 14 as required when the one-way disc 11 is opened without being restricted by the threaded connection position.

[0031] The lower end of the sampling tube 4 is provided with a threaded hole 15, and the threaded tube 14 is threadedly connected in the threaded hole 15. The lower end of the threaded tube 14 is provided with a hexagonal block 21. When the operator drives the threaded tube 14 to rotate through the hexagonal block 21, the threaded tube 14 moves up or down along the threaded hole 15, and changes the compression degree of the internal spring 16 through its axial position.

[0032] The top plate 18 and the opening / closing plate 17 are sequentially sleeved on the outside of the middle tube 13 from top to bottom. The upper end of the top plate 18 abuts against the one-way plate 11, and the opening / closing plate 17 is located below the top plate 18. The internal spring 16 is disposed between the opening / closing plate 17 and the threaded tube 14. The upper end of the internal spring 16 is connected to the opening / closing plate 17, and the lower end of the internal spring 16 abuts against the threaded tube 14, so that the adjustment displacement of the threaded tube 14 can be converted into a change in the preload of the internal spring 16.

[0033] An external spring 20 is sleeved on the outside of the intermediate tube 13. The upper end of the external spring 20 is connected to the opening and closing plate 17, and the lower end of the external spring 20 is connected to the intermediate tube 13. The external spring 20 applies a thrust to the opening and closing plate 17 toward the top plate 18, so that the opening and closing plate 17 fits against the top plate 18 when there is no cleaning medium pressure, and drives the opening and closing plate 17 to return to the position of closing the air outlet 22 after the cleaning medium stops input.

[0034] Multiple air vents 19 are provided on the outer wall of the intermediate tube 13. The air vents 19 are located on the outer wall of the intermediate tube 13 corresponding to the top plate 18 and the opening and closing plate 17. Air vent slits 22 are provided on the surfaces of the top plate 18 and the opening and closing plate 17 that are in contact with each other. After the opening and closing plate 17 leaves the top plate 18, the two air vent slits 22 form a connecting flow path with the air vents 19, so that the cleaning medium inside the intermediate tube 13 can enter the sampling tube 4.

[0035] An air inlet pipe 23 is coaxially arranged inside the threaded tube 14. An insertion hole 24 is provided in the middle of the opening and closing plate 17. The upper end of the air inlet pipe 23 is set towards the insertion hole 24. When the threaded tube 14 is in the sampling adjustment position, the air inlet pipe 23 and the insertion hole 24 are kept apart. When the threaded tube 14 moves upward to the cleaning position, it drives the air inlet pipe 23 to be inserted into the insertion hole 24, so that the cleaning medium introduced through the lower end of the threaded tube 14 directly reaches the mating position of the top plate 18 and the opening and closing plate 17.

[0036] When the yogurt is being transported normally and sampling is not required, the threaded tube 14 is in the sealed adjustment position, the internal spring 16 has a large preload, the internal spring 16 transmits an upward force to the one-way disc 11 through the opening and closing disc 17 and the top disc 18, the external spring 20 generates a reset thrust on the opening and closing disc 17, and the top spring 12 generates a reset thrust on the one-way disc 11 through the guide rod 10. The thrust provided by the three together is greater than the downward force generated by the normal yogurt transport pressure on the one-way disc 11.

[0037] In this sealed state, the one-way disc 11 is stably attached to the stop disc 8. The yogurt is pushed by the spiral blade 6 and continues to flow along the conveying pipe 1 to the discharge pipe 3. The yogurt will not enter the sampling pipe 4 and the outflow pipe 7 below the stop disc 8. The top disc 18 and the opening and closing disc 17 also remain attached and close the two air vents 22, so that the sampling passage and the cleaning passage are both in a closed state.

[0038] When a spot check is required, the operator moves the threaded tube 14 downward along the threaded hole 15 using the hexagonal block 21. The distance between the threaded tube 14 and the opening and closing disc 17 increases, and the compression and preload of the internal spring 16 decrease accordingly. Meanwhile, the top spring 12 and the external spring 20 maintain their original reset function, so that the total thrust acting on the one-way disc 11 decreases to less than the downward force generated by the yogurt conveying pressure.

[0039] The yogurt pressure overcomes the reduced total thrust and pushes the one-way disk 11 downward. The guide rod 10 slides downward along the guide hole 9 on the stop disk 8 and further compresses the top spring 12. After the one-way disk 11 leaves the stop disk 8, it forms an opening for the yogurt to pass through. The yogurt in the delivery pipe 1 enters the sampling pipe 4 below the stop disk 8 and flows out through the four outflow pipes 7 to complete the sample receiving.

[0040] When the one-way disc 11 moves downward, it drives the intermediate tube 13 to move synchronously. The sliding connection between the intermediate tube 13 and the threaded tube 14 provides a margin of movement for this displacement. The top disc 18 remains in contact with the one-way disc 11 and moves accordingly. The opening and closing disc 17 remains in contact with the top disc 18 under the action of the internal spring 16 and the external spring 20. Therefore, the cleaning passage will not be opened during the sampling process. The yogurt mainly enters the outflow pipe 7 along the passage formed after the one-way disc 11 is opened.

[0041] After the required sampling amount is reached, the operator rotates the threaded tube 14 in the opposite direction through the hexagonal block 21, causing the threaded tube 14 to move upward along the threaded hole 15. The compression of the internal spring 16 gradually increases, and the thrust transmitted from the internal spring 16 to the one-way disc 11 through the opening and closing disc 17 and the top disc 18 increases again. Under the combined action of the internal spring 16, the external spring 20 and the top spring 12, the one-way disc 11 moves upward and re-fits the stop disc 8.

[0042] After the one-way disc 11 re-attaches to the stop disc 8, the seal between the lower part of the conveying pipe 1 and the sampling pipe 4 is restored, and yogurt no longer enters the sampling pipe 4. The spiral blade 6 can still rotate and make the yogurt in the conveying pipe 1 continue to be conveyed to the discharge pipe 3. Therefore, the restoration of the seal after sampling does not require stopping the entire yogurt production line.

[0043] In order to remove residual yogurt in the sampling tube 4 and the outflow tube 7, after the one-way disc 11 restores the seal, the threaded tube 14 is rotated in the opposite direction, so that the threaded tube 14 moves further upward and drives the air inlet tube 23 to be inserted into the insertion hole 24 on the opening and closing disc 17. The upper end of the top disc 18 abuts against the one-way disc 11 and cannot move further upward. The air inlet tube 23 then establishes a cleaning medium input path from the lower end of the threaded tube 14 to the lower side of the opening and closing disc 17.

[0044] First, high-pressure gas is introduced into the lower end of the threaded tube 14. The high-pressure gas flows upward along the air inlet tube 23 and acts on the opening and closing plate 17. When the downward force generated by the gas pressure on the opening and closing plate 17 is greater than the upward thrust of the internal spring 16 and the external spring 20, the opening and closing plate 17 moves downward along the middle tube 13 and separates from the top plate 18, so that the two air outlet slits 22 change from the closed state to the open state.

[0045] High-pressure gas enters the corresponding vent 19 of the intermediate tube 13 through the opened vent slit 22, and diffuses to the lower part of the sampling tube 4 through multiple vent 19. After passing through the internal space where the yogurt actually enters and exits during sampling, the gas flow is discharged from the four outflow tubes 7 respectively. Since the gas can store pressure and expand rapidly after the vent slit 22 is opened, the high-speed gas flow formed can first carry away most of the yogurt residue in the sampling tube 4 and the outflow tubes 7.

[0046] After the air blowing is completed, high-pressure water is introduced into the lower end of the threaded tube 14 through the same inlet. The high-pressure water acts on the opening and closing plate 17 through the air inlet pipe 23 and keeps the opening and closing plate 17 separated from the top plate 18. The water flows through the air outlet 22 and the air outlet 19 in sequence into the lower part of the sampling tube 4, and then flows out through multiple outlet pipes 7. The water flow washes away the yogurt residue that is still attached to the inner wall of the sampling tube 4 and the inner wall of the outlet pipe 7 after the air blowing.

[0047] High-pressure gas has a high flow rate and is suitable for quickly expelling movable yogurt residue. High-pressure water has a low compressibility and can continuously wet and wash the attached surface. Therefore, blowing air first and then washing with water can reduce the amount of yogurt that needs to be carried in the initial water washing and make the subsequent water flow more concentrated to remove the residue on the inner wall. The two cleaning media share the air inlet pipe 23, air outlet slit 22, air outlet hole 19 and outflow pipe 7 without disassembling the sampling tube 4.

[0048] After the high-pressure water input stops, the downward pressure acting on the opening and closing plate 17 disappears. The outer spring 20 and the inner spring 16 push the opening and closing plate 17 to move upward along the middle tube 13 and re-fit the top plate 18. The two air vents 22 are closed again. The threaded tube 14 remains in the sealed position that makes the one-way plate 11 fit against the stop plate 8, so that the cleaned sampling tube 4 waits for the next sampling without being continuously connected to the yogurt in the delivery tube 1.

[0049] When sampling again, simply adjust the threaded tube 14 downwards to the sampling position using the hexagonal block 21, so that the preload of the internal spring 16 is reduced again. The yogurt pressure can then open the one-way disc 11 according to the aforementioned process. After sampling, adjust the threaded tube 14 upwards and perform air blowing and water washing in sequence. This forms a cyclical working process of sealing, sampling, resetting, air blowing, and water washing during the continuous operation of the yogurt production line.

[0050] In this embodiment, multiple guide holes 9 and guide rods 10 keep the one-way disc 11 aligned with the stop disc 8 during repeated opening and closing. Four outflow pipes 7 are distributed circumferentially along the sampling pipe 4 so that samples and cleaning media can be discharged from multiple directions. The hexagonal block 21 provides a clear position for applying rotational force to the threaded pipe 14. The operator can adjust the position of the threaded pipe 14 according to the delivery pressure and sampling needs and maintain the relative positional relationship between the components.

Claims

1. A sampling inspection mechanism for yogurt production line, comprising a conveying pipe (1) and a sampling pipe (4) connected to each other, characterized in that: Multiple outflow tubes (7) are provided on the outer wall of the sampling tube (4). A stop plate (8) is provided inside the sampling tube (4). A guide rod (10) is slidably connected in the guide hole (9) on the stop plate (8). The lower end of the guide rod (10) is connected to a one-way disc (11). A top spring (12) that abuts against the stop plate (8) is provided on the upper end of the guide rod (10). The lower end of the one-way disc (11) is connected to an intermediate tube (13). The lower end of the intermediate tube (13) is slidably connected to a threaded tube (14). The threaded tube (14) and the sampling tube are connected to each other. (4) The threaded hole (15) at the lower end is threaded; an internal spring (16), a hinged disc (17), a top disc (18) and an external spring (20) are provided on the outside of the middle tube (13). The top disc (18) abuts against the one-way disc (11). An air outlet (19) is provided on the outer wall of the middle tube (13). An air inlet pipe (23) is provided inside the threaded tube (14). An insertion hole (24) is provided on the hinged disc (17). An air outlet slit (22) is provided on the mating surfaces of the top disc (18) and the hinged disc (17).

2. The sampling inspection mechanism for yogurt production line according to claim 1, characterized in that: The feed pipe (2) and the discharge pipe (3) are respectively connected to the two ends of the conveying pipe (1). A motor (5) is installed on the conveying pipe (1). The output end of the motor (5) is connected to a spiral blade (6) arranged along the axial direction of the conveying pipe (1). The sampling pipe (4) is connected to one end of the conveying pipe (1) near the discharge pipe (3).

3. The sampling inspection mechanism for yogurt production line according to claim 1, characterized in that: The outer peripheral wall of the stop disk (8) is fixedly connected to the inner wall of the sampling tube (4). Multiple guide holes (9) are spaced apart along the circumference of the stop disk (8). Multiple guide rods (10) are slidably connected in the corresponding guide holes (9). The top spring (12) is sleeved on the upper end of the corresponding guide rod (10).

4. The sampling inspection mechanism for yogurt production line according to claim 3, characterized in that: One-way disc (11) is located below stop disc (8). The lower ends of multiple guide rods (10) are connected to the upper surface of one-way disc (11). The upper end of top spring (12) is connected to the guide rod (10), and the lower end of top spring (12) abuts against the upper surface of stop disc (8).

5. The sampling inspection mechanism for yogurt production line according to claim 1, characterized in that: Multiple outflow tubes (7) are arranged at equal intervals along the circumference of the sampling tube (4), and the outflow tubes (7) and the sampling tube (4) are connected to the internal space below the stop plate (8).

6. The sampling inspection mechanism for yogurt production line according to claim 1, characterized in that: The middle tube (13) is coaxially arranged with the one-way disc (11), and the top disc (18) and the opening and closing disc (17) are successively sleeved on the outside of the middle tube (13). The air outlet (19) is opened on the outer wall position corresponding to the middle tube (13), the top disc (18) and the opening and closing disc (17).

7. The sampling inspection mechanism for yogurt production line according to claim 6, characterized in that: The upper end of the inner spring (16) is connected to the opening and closing plate (17), and the lower end of the inner spring (16) abuts against the threaded tube (14). The upper end of the outer spring (20) is connected to the opening and closing plate (17), and the lower end of the outer spring (20) is connected to the intermediate tube (13). When the threaded tube (14) moves along the threaded hole (15), it changes the thrust of the inner spring (16) on the opening and closing plate (17).

8. The sampling inspection mechanism for yogurt production line according to claim 1, characterized in that: The lower end of the threaded tube (14) is provided with a hexagonal block (21), and the air inlet pipe (23) is coaxially arranged inside the threaded tube (14). The upper end of the air inlet pipe (23) can move with the threaded tube (14) and be inserted into the insertion hole (24) on the opening and closing plate (17).

9. The sampling inspection mechanism for yogurt production line according to claim 8, characterized in that: The top plate (18) is located above the opening and closing plate (17). The upper end of the top plate (18) abuts against the one-way plate (11). When the top plate (18) and the opening and closing plate (17) are in contact with each other, the air outlet (22) is closed. When the opening and closing plate (17) moves downward along the middle tube (13), the two air outlets (22) are connected to the air outlet (19).

10. A sampling inspection mechanism for yogurt production line according to claim 9, characterized in that: When the threaded tube (14) moves downward, the preload of the internal spring (16) is reduced so that the one-way disc (11) can leave the stop disc (8) under the pressure of the yogurt in the delivery pipe (1). When the threaded tube (14) moves upward, the preload of the internal spring (16) is increased and the air inlet pipe (23) is inserted into the insertion hole (24) so ​​that the pressure medium introduced through the air inlet pipe (23) pushes the opening and closing disc (17) away from the top disc (18).

Images