Liquid delivery pipe capable of realizing precise flow regulation and flow regulation method

Abstract

The present invention discloses a liquid delivery pipe and flow regulation method capable of achieving precise flow regulation, relating to the technical field of liquid delivery pipes. The liquid delivery pipe capable of achieving precise flow regulation comprises a drip pot, wherein a delivery pipe connected to the top and bottom of the drip pot is fixedly mounted, and a flow regulation mechanism is provided on the delivery pipe. The drip pot and the flow regulation mechanism are sequentially arranged along the liquid flow direction; the flow regulation mechanism comprises a fixed cover and a rotating sleeve. When the present invention is in use, the rotating sleeve and the fixed cover rotate, causing the extrusion assembly to squeeze the delivery pipe, thereby changing the amount of liquid passing through the delivery pipe. At the same time, the fixed cover drives the pointer to rotate, and the rotation of the pointer causes the position of the scale bar directly opposite the pointer to change, thereby enabling precise flow regulation. The position of the flow regulation mechanism is easy to replace, and no readjustment is required after replacement.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid delivery pipes, and in particular to a liquid delivery pipe capable of achieving precise flow regulation and a flow regulation method. Background Art

[0002] During the infusion process, the liquid delivery tube is responsible for transferring the liquid medicine from the infusion container to the human body, while flow regulation is achieved through a flow regulator installed on the liquid delivery tube, which can adjust the speed of liquid medicine delivery to meet different medical needs.

[0003] When the flow regulating mechanism on the existing liquid delivery tube is used to regulate the flow of the liquid delivery tube, it can only judge the flow rate of the liquid by observing the falling speed of the liquid on the drip pot, and cannot more accurately determine the liquid flow in the liquid delivery tube. At the same time, after the existing liquid flow is regulated, if the height of the flow regulating mechanism needs to be adjusted to meet the self-regulation needs of different patients, it is necessary to first release the squeeze on the liquid delivery tube and then move the position of the flow regulating mechanism. After the position adjustment is completed, it is necessary to readjust the flow regulating mechanism again, which is very inconvenient to use. Therefore, we disclose a liquid delivery tube and a flow regulating method that can achieve precise flow regulation. Summary of the Invention

[0004] The present invention provides a liquid delivery pipe and a flow regulation method capable of achieving precise flow regulation, so as to solve the problems raised in the background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a liquid delivery pipe capable of achieving precise flow regulation, comprising a dripping pot, wherein the top and bottom of the dripping pot are fixedly mounted with interconnected delivery pipes, the delivery pipes being provided with flow regulating mechanisms, the dripping pot and the flow regulating mechanisms being sequentially arranged along the liquid flow direction;

[0006] The flow regulating mechanism includes a fixed cover and a rotating sleeve, an annular rotating groove is provided around the lower part of the rotating sleeve, the fixed cover is provided on the lower side of the rotating sleeve and is rotatably connected to the fixed cover, scale bars are evenly spaced around the inner wall of the annular rotating groove, a pointer is fixedly installed on the top of the fixed cover, a protective assembly is installed on the outer side of the fixed cover, an extrusion assembly is installed between the fixed cover and the rotating sleeve, the extrusion assembly corresponds to the position of the delivery pipe, and extrudes the delivery pipe to achieve flow regulation of the delivery pipe.

[0007] Furthermore, the protective component includes an annular limiting groove arranged around the top of the fixed cover, and a plurality of push grooves are evenly spaced around the side of the fixed cover. The push grooves are arranged on the lower side of the annular limiting groove and are connected to the annular limiting groove. Elastic blocks are fixedly installed on the inner walls on both sides of the push grooves, and the tops of the plurality of elastic blocks are on the same horizontal plane as the bottom inner wall of the annular limiting groove. A plurality of push blocks are rotatably installed in the annular limiting groove, and the push blocks correspond to the push grooves one by one. A movable sleeve is provided on the outer cover of the fixed cover, and the plurality of push blocks are fixedly connected to the movable sleeve.

[0008] Furthermore, a plurality of friction blocks are evenly spaced on the outer sides of the movable sleeve and the rotating sleeve.

[0009] Furthermore, an annular positioning groove is provided on the inner wall of the fixed cover, and a rotating ring is fixedly installed on the annular inner wall of the annular rotating groove. The rotating ring is located in the annular positioning groove and slides relatively therewith.

[0010] Furthermore, the extrusion assembly includes a plurality of guide columns fixedly mounted on the upper side of the fixed cover, the plurality of guide columns are evenly spaced around the fixed cover, an external threaded sleeve is slidably sleeved on the plurality of guide columns, an internal thread is provided on the inner wall of the rotating sleeve, the internal thread is threadedly connected to the external threaded sleeve, and two of the relatively arranged guide columns are installed with extrusion units, and the two extrusion units are installed with limiting units.

[0011] Furthermore, the extrusion unit includes a rectangular hole opened at the bottom end of the guide column, a sliding column is slidably installed in the rectangular hole, both ends of the sliding column extend outside the rectangular hole, a pushing column is fixedly installed at one end of the sliding column, and an extrusion column is fixedly installed on the side of the pushing column away from the sliding column, the length of the extrusion column is greater than the outer diameter of the conveying tube, and an axial T-shaped groove is provided on the inner wall of the external threaded sleeve, the T-shaped groove is located on the outer side of the pushing column, and a T-shaped sliding column is slidably installed in the T-shaped groove, and two parallel rotating rods are rotatably installed on the side of the T-shaped sliding column, and the bottom ends of the two parallel rotating rods are rotatably installed on the pushing column, and the T-shaped sliding column, parallel rotating rod and pushing column are combined into a four-link link.

[0012] Furthermore, the limiting unit includes a pressing plate fixedly mounted on the top of the two T-shaped sliding columns, and two grooves are symmetrically provided on both sides of the top of the pressing plate, and the bottoms of the two grooves are provided with movable holes that pass through the pressing plate, and pinching blocks are slidably installed in the two grooves, and the bottoms of the two pinching blocks are fixedly mounted with moving rods, and the bottom ends of the two moving rods respectively pass through the two moving holes, and the sides of the two moving rods that are away from each other are fixedly mounted with semi-cylinders, and two mounting blocks are fixedly mounted on the top of the external threaded sleeve, and the sides of the two mounting blocks that are close to each other are provided with rectangular grooves, and the two semi-cylinders extend into the two rectangular grooves respectively, and the tops of the two mounting blocks are provided with inclined portions, and the bottoms of the semi-cylinders correspond to the positions of the inclined portions.

[0013] Furthermore, two reset rods are fixedly installed on the inner walls of the two grooves close to each other, and the pinching block is slidably sleeved on the two reset rods on the corresponding sides. A reset spring is sleeved on the reset rod, and the two ends of the reset spring are respectively fixedly installed on the inner wall of the groove and the pinching block.

[0014] Furthermore, avoidance holes are provided on the fixing cover and the pressing plate, and one end of the delivery pipe passes through the two avoidance holes in sequence.

[0015] A flow regulation method for a liquid delivery pipe capable of achieving precise flow regulation as described above comprises the following steps:

[0016] Step 1: Fix the protective component and the fixed cover;

[0017] Step 2: Make the fixed cover and the rotating sleeve rotate relative to each other through the protective assembly;

[0018] Step 2: The fixed cover squeezes the delivery pipe through the squeezing assembly to adjust the flow rate of the delivery pipe.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] When the present invention is in use, the rotating sleeve and the fixed cover rotate relative to each other, so that the extrusion component squeezes the delivery pipe, thereby changing the amount of liquid passing through the delivery pipe. At the same time, the rotation of the fixed cover drives the pointer to rotate, so that the position of the scale bar opposite to the pointer changes, thereby accurately adjusting the flow rate. The position of the flow regulating mechanism is easy to replace, and no readjustment is required after replacement.

[0021] In the present invention, when it is necessary to adjust the extrusion position of the extrusion column and the conveying tube, the two pinching blocks can be pinched to make them approach each other. The movement of the two pinching blocks causes the two return springs to deform. At the same time, the movement of the two pinching blocks drives the two moving rods to move. The movement of the two moving rods drives the two semi-cylinders to move out of the two rectangular grooves respectively. At this time, the pressing plate and the external threaded sleeve lose their fixed state, and the T-shaped sliding column loses its fixed state. Since the pressing plate can move up and down, the two extrusion columns no longer squeeze the conveying tube. After adjusting the extrusion columns to the appropriate height, the two extrusion columns can be restored to their original state by pressing the pressing plate, and the moving distances of the two extrusion columns are the same after fixation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A three-dimensional schematic diagram of a liquid delivery pipe capable of achieving precise flow regulation;

[0023] Figure 2 is a three-dimensional schematic diagram of a flow regulating mechanism;

[0024] Figure 3 It is a three-dimensional diagram of the flow regulating mechanism without the fixed cover;

[0025] Figure 4 This is a cross-sectional view of the flow regulating mechanism at the kneading block;

[0026] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0027] Figure 6 A first-perspective cutaway view of the flow regulating mechanism on one side of the mounting block;

[0028] Figure 7 A perspective view of the connection between the moving rod, half cylinder and mounting block;

[0029] Figure 8 A cross-sectional view of the flow regulating mechanism from another perspective on one side of the mounting block;

[0030] Figure 9 for Figure 8 Enlarged view of point B in the middle.

[0031] In the figure: 1. Pressing plate; 2. Delivery pipe; 3. Drip pot; 4. Rotating sleeve; 5. Moving sleeve; 6. Friction block; 7. Annular rotating groove; 8. Annular limiting groove; 9. Elastic block; 10. Fixed cover; 11. Pushing groove; 12. Pushing block; 13. Pointer; 14. Scale bar; 15. T-shaped slide groove; 16. T-shaped slide column; 17. Parallel rotating rod; 18. Externally threaded sleeve; 19. Guide column; 20. Extrusion column; 21. Sliding column; 22. Pushing column; 23. Rotating ring; 24. Internal thread; 25. Moving rod; 26. Semi-cylinder; 27. Rectangular groove; 28. Mounting block; 29. ​​Inclined part; 30. Reset rod; 31. Reset spring; 32. Pinch block. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with specific embodiments. However, people familiar with the art should understand that the detailed description given here in conjunction with the drawings is for better explanation, and the structure of the present invention necessarily exceeds these limited embodiments. For some equivalent replacement solutions or common means, they will not be described in detail herein, but they still fall within the scope of protection of this application.

[0033] Figures 1-9 The best embodiment of the present invention is shown below in conjunction with the attached Figures 1-9 The present invention is further described.

[0034] Refer to the attached Figures 1-9 The present invention discloses a liquid delivery pipe capable of achieving precise flow regulation, comprising a dripping pot 3, wherein the top and bottom of the dripping pot 3 are fixedly mounted with a communicating delivery pipe 2, the delivery pipe 2 is provided with a flow regulating mechanism, and the dripping pot 3 and the flow regulating mechanism are sequentially arranged along the liquid flow direction.

[0035] The flow regulating mechanism includes a fixed cover 10 and a rotating sleeve 4. An annular rotating groove 7 is provided around the lower part of the rotating sleeve 4. The fixed cover 10 is provided on the lower side of the rotating sleeve 4 and is rotatably connected to the fixed cover 10. Scale bars 14 are evenly spaced around the inner wall of the annular rotating groove 7. A pointer 13 is fixedly installed on the top of the fixed cover 10. The position of the pointer 13 corresponds to the position of the scale bar 14. A protective component is installed on the outside of the fixed cover 10. An extrusion component is installed between the fixed cover 10 and the rotating sleeve 4. The extrusion component corresponds to the position of the delivery pipe 2 and extrudes the delivery pipe 2 to achieve flow regulation of the delivery pipe 2.

[0036] By means of the above structure: when in use, the relative rotation of the rotating sleeve 4 and the fixed cover 10 can cause the extrusion assembly to squeeze the delivery tube 2, thereby changing the liquid flow rate of the delivery tube 2. At the same time, the rotation of the fixed cover 10 drives the pointer 13 to rotate, so that the position of the scale bar 14 opposite to the pointer 13 changes, thereby accurately adjusting the flow rate of the delivery tube 2, and the position of the flow regulating mechanism is convenient for replacement, and no readjustment is required after replacement.

[0037] like Figure 2 and Figure 3 As shown, the protective component includes an annular limiting groove 8 arranged around the top of the fixed cover 10, and a plurality of push grooves 11 are evenly spaced around the side of the fixed cover 10. The push grooves 11 are arranged on the lower side of the annular limiting groove 8 and are connected to the annular limiting groove 8. Elastic blocks 9 are fixedly installed on the inner walls on both sides of the plurality of push grooves 11. The tops of the plurality of elastic blocks 9 are on the same horizontal plane as the bottom inner wall of the annular limiting groove 8. A plurality of push blocks 12 are rotatably installed in the annular limiting groove 8. The push blocks 12 correspond one-to-one to the push grooves 11. A movable sleeve 5 is provided on the outer cover of the fixed cover 10, and the plurality of push blocks 12 are fixedly connected to the inner wall of the movable sleeve 5. After reaching the appropriate position, stop rotating the fixed cover 10, and then push the movable sleeve 5 upward. The movable sleeve 5 moves to drive multiple pushing blocks 12 to move from multiple pushing grooves 11 into the annular limiting groove 8 respectively. The multiple elastic blocks 9 return to their original shape after deformation, thereby supporting the bottom of the multiple pushing blocks 12 to prevent the pushing blocks 12 from entering the pushing groove 11 when the annular limiting groove 8 rotates. At this time, the movable sleeve 5 and the fixed cover 10 can rotate relative to each other, and the position of the fixed cover 10 and the rotating sleeve 4 cannot be adjusted by rotating the movable sleeve 5.

[0038] like Figure 2 As shown, a plurality of friction blocks 6 are evenly spaced on the outer sides of the movable sleeve 5 and the rotating sleeve 4. The arrangement of the friction blocks 6 facilitates the relative rotation of the movable sleeve 5 and the rotating sleeve 4.

[0039] like Figure 6 As shown, the inner wall of the fixed cover 10 is provided with an annular positioning groove, and a rotating ring 23 is fixedly installed on the inner wall of the annular rotating groove 7. The rotating ring 23 is located in the annular positioning groove and slides relative to it. By setting the rotating ring 23, the rotating sleeve 4 can only rotate relative to the fixed cover 10.

[0040] like Figure 4 and Figure 5 As shown, the extrusion assembly includes multiple guide posts 19 fixedly mounted on the upper side of the fixed cover 10. The multiple guide posts 19 are evenly spaced around the fixed cover 10. Externally threaded sleeves 18 are slidably sleeved on the multiple guide posts 19. The inner wall of the rotating sleeve 4 is provided with internal threads 24, which are threadedly connected to the externally threaded sleeve 18. Two of the oppositely arranged guide posts 19 are mounted with extrusion units, and the two extrusion units are mounted with limit units. After pinching the rotating sleeve 4 and rotating the movable sleeve 5, the movable sleeve 5 drives the multiple push blocks 12 and the fixed cover 10 to rotate, thereby causing the fixed cover 10 and the rotating sleeve 4 to rotate relative to each other. Since the externally threaded sleeve 18 cannot rotate and can only move up and down, the externally threaded sleeve 18 and the two T-shaped sliding posts 16 move downward.

[0041] like Figure 5As shown, the extrusion unit includes a rectangular hole opened at the bottom end of the guide column 19, and a sliding column 21 is slidably installed in the rectangular hole. Both ends of the sliding column 21 extend outside the rectangular hole, and a pushing column 22 is fixedly installed at one end of the sliding column 21. An extrusion column 20 is fixedly installed on the side of the pushing column 22 away from the sliding column 21. The length of the extrusion column 20 is greater than the outer diameter of the conveying pipe 2. An axial T-shaped groove 15 is provided on the inner wall of the external threaded sleeve 18. The T-shaped groove 15 is located on the outside of the pushing column 22. A T-shaped slide column 16 is slidably installed in the T-shaped groove 15. Two parallel rotating rods 17 are rotatably installed on the side of the T-shaped slide column 16. The bottom ends of the two parallel rotating rods 17 are rotatably installed on the pushing column 22. The T-shaped slide column 16, the parallel rotating rod 17 and the pushing column 22 are combined into a four-link connection. The external threaded sleeve 18 and the two T-shaped slide columns 16 move downward, the two T-shaped slide columns 16 drive the two parallel rotating rods 17 to rotate, the two parallel rotating rods 17 drive the two pushing columns 22 to approach each other, and the two squeezing columns 20 squeeze the delivery pipe 2, thereby changing the liquid flow rate of the delivery pipe 2.

[0042] like Figure 7 、 Figure 8 and Figure 9 As shown, the limiting unit includes a pressing plate 1 fixedly mounted on the top of the two T-shaped sliding columns 16, and two grooves are symmetrically provided on both sides of the top of the pressing plate 1, and the bottom of the two grooves is provided with a moving hole that passes through the pressing plate 1, and pinching blocks 32 are slidably installed in the two grooves, and the bottom of the two pinching blocks 32 is fixedly mounted with a moving rod 25, and the bottom ends of the two moving rods 25 respectively pass through the two moving holes, and the sides of the two moving rods 25 that are away from each other are fixedly mounted with semi-cylinders 26, and the top of the external threaded sleeve 18 is fixedly mounted with two mounting blocks 28, and the sides of the two mounting blocks 28 that are close to each other are provided with rectangular grooves 27, and the two semi-cylinders 26 extend into the two rectangular grooves 27 respectively, and the tops of the two mounting blocks 28 are provided with inclined portions 29, so that the thickness of the mounting block 28 gradually decreases in the direction close to the moving rod 25, and the bottom of the semi-cylinder 26 corresponds to the position of the inclined portion 29. When it is necessary to adjust the extrusion position of the extrusion column 20 and the conveying pipe 2, the two pinching blocks 32 can be pinched to make them close to each other. The movement of the two pinching blocks 32 causes the two return springs 31 to deform. At the same time, the movement of the two pinching blocks 32 drives the two moving rods 25 to move. The movement of the two moving rods 25 drives the two semi-cylinders 26 to move out of the two rectangular grooves 27 respectively. At this time, the pressing plate 1 and the external threaded sleeve 18 lose their fixed state, and the T-shaped sliding column 16 loses its fixed state. Since the pressing plate 1 can move up and down, the two extrusion columns 20 no longer squeeze the conveying pipe 2. After adjusting the extrusion columns 20 to the appropriate height, the two extrusion columns 20 can be restored to their original state by pressing the pressing plate 1.

[0043] like Figure 9As shown, two reset rods 30 are fixedly mounted on the inner walls of the two grooves adjacent to each other. A pinch block 32 is slidably mounted on the two reset rods 30 on the corresponding side. A reset spring 31 is mounted on the reset rod 30. The two ends of the reset spring 31 are respectively fixedly mounted on the inner wall of the groove and the pinch block 32. The reset spring 31 facilitates the return of the pinch block 32 to its original position after movement.

[0044] like Figure 2 and Figure 6 As shown, the fixed cover 10 and the pressing plate 1 are both provided with avoidance holes, and one end of the delivery pipe 2 passes through the two avoidance holes in sequence. The arrangement of the avoidance holes facilitates the avoidance of the delivery pipe 2.

[0045] The present application also discloses a flow rate regulation method for a liquid delivery pipe capable of achieving precise flow rate regulation, comprising the following steps:

[0046] The first embodiment of the present invention is to adjust the screw thread 12 of the movable sleeve 5 so that the plurality of push blocks 12 on the movable sleeve 5 are aligned with the plurality of push grooves 11 respectively, and then the movable sleeve 5 is pulled downward to make the plurality of push blocks 12 enter the plurality of push grooves 11. The plurality of elastic blocks 9 return to their original shape after being deformed, and then the movable sleeve 5 is rotated after pinching the rotating sleeve 4. The movable sleeve 5 drives the plurality of push blocks 12 and the fixed cover 10 to rotate, thereby causing the fixed cover 10 and the rotating sleeve 4 to rotate relative to each other. Since the external threaded sleeve 18 cannot rotate and can only move up and down, the external threaded sleeve 18 and the two T-shaped sliding posts 16 move downward, and the two T-shaped sliding posts 16 move downward to drive the two parallel rotating rods 17 to rotate. The rotation of the two parallel rotating rods 17 drives the two push posts 22 to approach each other, thereby causing the two squeezing posts 20 to approach each other. The two squeezing posts 20 approach each other to squeeze the delivery pipe 2, thereby causing the liquid passing through the delivery pipe 2 to change. At the same time, the fixed cover 10 drives the pointer 13 to rotate, so that the position of the scale bar 14 facing the pointer 13 changes.

[0047] Step 2. After reaching the appropriate position, stop rotating the fixed cover 10 and the rotating sleeve 4, then push the movable sleeve 5 upward, and the movable sleeve 5 moves to drive the multiple pushing blocks 12 to move from the multiple pushing grooves 11 into the annular limiting groove 8 respectively. At this time, the pushing blocks 12 are separated from the pushing grooves 11, and the multiple elastic blocks 9 are deformed and then restored to their original shape, thereby supporting the bottoms of the multiple pushing blocks 12 to prevent the pushing blocks 12 from entering the pushing grooves 11 when the annular limiting groove 8 rotates. At this time, the movable sleeve 5 and the fixed cover 10 are in a rotationally connected state, and others cannot adjust the positions of the fixed cover 10 and the rotating sleeve 4 by rotating the movable sleeve 5;

[0048] Step 3. When it is necessary to adjust the extrusion position of the extrusion column 20 and the delivery pipe 2, the two pinching blocks 32 can be pinched to make them close to each other. The movement of the two pinching blocks 32 causes the two return springs 31 to deform. At the same time, the movement of the two pinching blocks 32 drives the two moving rods 25 to move. The movement of the two moving rods 25 drives the two semi-cylinders 26 to move out of the two rectangular grooves 27 respectively. At this time, the pressing plate 1 and the external threaded sleeve 18 lose their fixed state, and the T-shaped sliding column 16 loses its fixed state. Since the pressing plate 1 can move up and down, the two extrusion columns 20 no longer squeeze the delivery pipe 2. After adjusting the extrusion column 20 to a suitable height, the pressing plate 1 can be made close to the external threaded sleeve 18 by pressing the pressing plate 1. The threaded sleeve 18 and the pressing plate 1 move to drive the two moving rods 25 and the two semi-cylinders 26 to move. When the semicircular sides of the two semi-cylinders 26 contact the two inclined parts 29, the two semi-cylinders 26 are squeezed so that the two semi-cylinders 26 are close to each other. The two semi-cylinders 26 drive the two moving rods 25 and the two pinching blocks 32 to move, and the two return springs 31 are deformed. When the two semi-cylinders 26 correspond to the positions of the two rectangular grooves 27, the two return springs 31 act to make the two semi-cylinders 26 enter the two rectangular grooves 27 respectively, completing the fixation. After fixation, the moving distances of the two extrusion columns 20 are the same, and there is no need to rotate the fixing cover 10 and the rotating sleeve 4.

[0049] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any other manner. Any person skilled in the art may utilize the above disclosed technical content to modify or modify the present invention into equivalent embodiments with equivalent variations. However, any simple modifications, equivalent variations, and modifications to the above embodiments that do not depart from the technical content of the present invention and are based on the technical essence of the present invention shall still fall within the scope of protection of the present invention.

Claims

1. A liquid delivery pipe capable of achieving precise flow regulation, characterized by: It comprises a dripping pot (3), wherein the top and bottom of the dripping pot (3) are fixedly mounted with a communicating delivery pipe (2), the delivery pipe (2) is provided with a flow regulating mechanism, and the dripping pot (3) and the flow regulating mechanism are sequentially arranged along the liquid flow direction; The flow regulating mechanism comprises a fixed cover (10) and a rotating sleeve (4), an annular rotating groove (7) is provided around the lower part of the rotating sleeve (4), the fixed cover (10) is provided on the lower side of the rotating sleeve (4) and is rotatably connected to the fixed cover (10), scale bars (14) are evenly spaced around the inner wall of the annular rotating groove (7), a pointer (13) is fixedly installed on the top of the fixed cover (10), a protective component is installed on the outer side of the fixed cover (10), an extrusion component is installed between the fixed cover (10) and the rotating sleeve (4), the extrusion component corresponds to the position of the delivery pipe (2), and extrudes the delivery pipe (2) to achieve flow regulation of the delivery pipe (2); The extrusion assembly includes a plurality of guide columns (19) fixedly mounted on the upper side of the fixed cover (10), the plurality of guide columns (19) are evenly spaced around the fixed cover (10), an external threaded sleeve (18) is slidably sleeved on the plurality of guide columns (19), an internal thread (24) is provided on the inner wall of the rotating sleeve (4), the internal thread (24) is threadedly connected to the external threaded sleeve (18), wherein two of the guide columns (19) arranged opposite to each other are mounted with extrusion units, and the two extrusion units are mounted with limiting units; The extrusion unit includes a rectangular hole opened at the bottom end of the guide column (19), a sliding column (21) is slidably installed in the rectangular hole, both ends of the sliding column (21) extend outside the rectangular hole, one end of the sliding column (21) is fixedly installed with a push column (22), and the side of the push column (22) away from the sliding column (21) is fixedly installed with an extrusion column (20), the length of the extrusion column (20) is greater than the outer diameter of the conveying pipe (2), the inner wall of the external threaded sleeve (18) is provided with an axial T-shaped slide groove (15), the T-shaped slide groove (15) is located on the outer side of the push column (22), and a T-shaped slide column (16) is slidably installed in the T-shaped slide groove (15), the side of the T-shaped slide column (16) is rotatably installed with two parallel rotating rods (17), the bottom ends of the two parallel rotating rods (17) are rotatably installed on the push column (22), and the T-shaped slide column (16), the parallel rotating rod (17) and the push column (22) are combined into a four-link rod. The limiting unit includes a pressing plate (1) fixedly mounted on the top of the two T-shaped sliding columns (16), two grooves are symmetrically provided on both sides of the top of the pressing plate (1), and the bottoms of the two grooves are provided with moving holes that penetrate the pressing plate (1), and pinching blocks (32) are slidably installed in the two grooves. The bottoms of the two pinching blocks (32) are fixedly mounted with moving rods (25), and the bottom ends of the two moving rods (25) respectively penetrate the two moving holes, and the sides of the two moving rods (25) that are away from each other are fixedly mounted with semi-cylinders (26), and the top of the external threaded sleeve (18) is fixedly mounted with two mounting blocks (28), and the sides of the two mounting blocks (28) that are close to each other are provided with rectangular grooves (27), and the two semi-cylinders (26) extend into the two rectangular grooves (27), and the tops of the two mounting blocks (28) are provided with inclined portions (29), and the bottoms of the semi-cylinders (26) correspond to the positions of the inclined portions (29).

2. The liquid delivery pipe capable of achieving precise flow regulation according to claim 1, characterized in that: The protective component includes an annular limiting groove (8) arranged around the top of the fixed cover (10), and a plurality of push grooves (11) are evenly spaced around the side of the fixed cover (10). The push grooves (11) are arranged on the lower side of the annular limiting groove (8) and are connected to the annular limiting groove (8). Elastic blocks (9) are fixedly installed on the inner walls on both sides of the plurality of push grooves (11). The tops of the plurality of elastic blocks (9) are on the same horizontal plane as the bottom inner wall of the annular limiting groove (8). A plurality of push blocks (12) are rotatably installed in the annular limiting groove (8), and the push blocks (12) correspond to the push grooves (11) one by one. The outer cover of the fixed cover (10) is provided with a movable sleeve (5), and the plurality of push blocks (12) are fixedly connected to the movable sleeve (5).

3. The liquid delivery pipe capable of achieving precise flow regulation according to claim 2, characterized in that: A plurality of friction blocks (6) are evenly spaced on the outer sides of the movable sleeve (5) and the rotating sleeve (4).

4. The liquid delivery pipe capable of achieving precise flow regulation according to claim 1, characterized in that: An annular positioning groove is provided on the inner wall of the fixed cover (10), and a rotating ring (23) is fixedly mounted on the annular inner wall of the annular rotating groove (7). The rotating ring (23) is located in the annular positioning groove and slides relative to the annular positioning groove.

5. The liquid delivery pipe capable of achieving precise flow regulation according to claim 1, characterized in that: Two reset rods (30) are fixedly mounted on the inner walls of the two grooves adjacent to each other, the pinching block (32) is slidably sleeved on the two reset rods (30) on the corresponding sides, a reset spring (31) is sleeved on the reset rod (30), and both ends of the reset spring (31) are fixedly mounted on the inner wall of the groove and the pinching block (32) respectively.

6. The liquid delivery pipe capable of achieving precise flow regulation according to claim 1, characterized in that: The fixed cover (10) and the pressing plate (1) are both provided with avoidance holes, and one end of the delivery pipe (2) passes through the two avoidance holes in sequence.

7. A flow regulation method for a liquid delivery pipe capable of achieving precise flow regulation according to any one of claims 1 to 6, characterized in that: The following steps are included: Step 1: fixing the protective component to the fixing cover (10); Step 2: Using the protective assembly, the fixed cover (10) and the rotating sleeve (4) are rotated relative to each other; Step 3: The fixed cover (10) squeezes the delivery tube (2) through the squeezing assembly to adjust the flow rate of the delivery tube (2).

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