A granulator for pig farm feed and a method for adding medicine

Abstract

The application provides a granulator for pig farm feed and a medicine adding method, which comprises a granulating barrel, a pushing mechanism, a granulating die and a cutting mechanism, the granulating die comprises a plurality of axially stacked granulating plates, the granulating plates are provided with granulating holes in the axial direction, and the granulating holes on the same axis form a continuous conical hole; the pushing mechanism comprises a pushing plate, the pushing plate is provided with a conical through hole corresponding to the granulating hole, an anti-blocking assembly moving in the axial direction is arranged in the conical through hole, the anti-blocking assembly comprises a center rod, the left end of the center rod is provided with an elastic support, and the outer side of the elastic support is sleeved with a flexible sleeve. With the change of the inner diameter of the granulating hole, the left end of the anti-blocking assembly is always close to the inner wall of the granulating hole, and the residual adhered mixed material in the granulating hole is effectively cleaned; the same particle size of granular medicine is prepared according to the particle size of the granular feed, the same particle size is not easy to stratify after mixing, uniform medicine adding of the granular feed is realized, and medicine poisoning is prevented.

Description

Technical Field

[0001] This invention relates to the field of pellet mill technology, and in particular to a pellet mill and a method for adding medicine to feed in pig farms. Background Technology

[0002] To maintain pigs' health and boost their immunity, certain medications are added to their feed and pelleted for easy mixing. However, existing pellet mills are prone to clogging during pelleting, requiring manual cleaning, which is inefficient and inconvenient. Furthermore, the mixing of existing drug powders and pellets often results in uneven stratification, leading to ineffective or excessive medication, prolonging the disease cycle, potentially causing drug poisoning, and ultimately compromising food safety and causing significant waste.

[0003] Pelletizers involving anti-clogging mechanisms, such as patent document CN216964502U, use an electric push rod to drive an anti-clogging rod to clear the pelleting holes after pelleting. The pelleting holes and the anti-clogging rod are typically of equal diameter. In wet pelleting, the raw materials have a certain viscosity and easily adhere to the inner wall of the pelleting holes. If this structure is used to prepare feed pellets of different sizes, the following problems may arise: If a smaller diameter pelleting hole is used, the original anti-clogging rod, due to its larger outer diameter, cannot extend into the pelleting hole and thus cannot clear the blockage; if a larger diameter pelleting hole is used, the outer diameter of the anti-clogging rod is too small to fit snugly against the inner wall of the pelleting hole, resulting in residual adhered raw material remaining on the inner wall of the pelleting hole.

[0004] For example, in patent document CN211936815U, the cleaning unit includes an air pump and an air delivery pipe. It cleans the raw material clogging the granulation hole by blowing air and increasing the pressure. This structure is suitable for dry granulation. However, if it is used for wet granulation, it has limited effect on the adhering raw material remaining on the inner wall of the granulation hole. Summary of the Invention

[0005] This invention proposes a pellet mill and dosing method for pig farm feed medication, which is suitable for preparing granular drugs of different particle sizes. Moreover, as the inner diameter of the pellet milling hole changes, the left end of the anti-clogging component always stays in close contact with the inner wall of the pellet milling hole, effectively cleaning the residual adhering mixed material in the pellet milling hole. With this pellet mill, it is easy to prepare granular drugs of the same particle size according to the particle size of the pelleted feed, and granular drugs and pelleted feed of the same particle size are less likely to separate into layers after mixing.

[0006] The technical solution of the present invention is implemented as follows: a pellet mill for pig farm feed and medicine, including a pelleting barrel, a feeding mechanism that moves axially at the right end of the pelleting barrel, a pelleting mold at the left end, a cutting mechanism at the left end of the pelleting mold, the pelleting mold including a plurality of axially stacked pelleting plates, pelleting holes arranged along the axial direction on the pelleting plates, the pelleting holes on the same axis forming a continuous conical hole, the right end of the conical hole being the end with a larger diameter;

[0007] The feeding mechanism includes a feeding plate with conical through holes corresponding to the granulation holes. The left end of the conical through hole has a larger diameter and the same inner diameter as the right end of the conical through hole. An axially movable anti-blocking component is installed inside the conical through hole. The anti-blocking component includes a central rod with an elastic support at the left end of the central rod. The elastic support is fitted with a flexible outer sleeve.

[0008] Furthermore, the elastic support includes radially arranged elastic telescopic rods, with multiple elastic telescopic rods evenly distributed circumferentially along the left end of the central rod. One end of each elastic telescopic rod is fixedly connected to the central rod, while the other end is a free end. A circumferentially sliding arc-shaped spring sheet is provided between the free ends of adjacent elastic telescopic rods.

[0009] Furthermore, a sliding sleeve is connected to the inner side of the right end of the flexible outer sleeve. The sliding sleeve is slidably mounted on the central rod. The elastic support also includes a compression spring, which is mounted on the central rod. The left end of the compression spring abuts against the elastic telescopic rod, and the right end abuts against the sliding sleeve.

[0010] Furthermore, the free end of the elastic telescopic rod is provided with a first sliding hole and a second sliding hole. Both the first sliding hole and the second sliding hole are arranged circumferentially. The first sliding hole is located inside the second sliding hole. One end of the arc-shaped spring sheet slides through the first sliding hole, and the other end slides through the second sliding hole of the adjacent elastic telescopic rod.

[0011] Furthermore, the pushing mechanism also includes a telescopic cylinder. The left end of the telescopic cylinder is connected to the intermediate plate. Multiple guide rods are provided between the intermediate plate and the pushing plate. The left end of the guide rod is fixedly connected to the pushing plate. The right end of the guide rod slides through the intermediate plate and is fixed with a limit block. A first support spring is fitted on the guide rod. The right end of the central rod passes through a tapered through hole and is fixedly connected to the intermediate plate.

[0012] Furthermore, the right edges of adjacent conical holes are joined together, allowing the mixture in the granulation tank to enter the conical holes as much as possible and avoiding dead corners.

[0013] Furthermore, the cutting mechanism includes a motor-driven elastic telescopic shaft, the right end of which is connected to a scraper located at the left end of the granulation die. The scraper cuts the granulated drug, while the elastic telescopic shaft allows for automatic length adjustment based on the number of granulation plates.

[0014] A method for adding medicine to pig farm feed, using the aforementioned pellet mill, includes the following steps:

[0015] (1) Determine the number of stacked granulation plates according to the required particle size of the granulated drug, so that the inner diameter of the left end of the conical hole is consistent with the required particle size of the granulated feed.

[0016] (2) Mix the medicine and feed additives in the mixer to obtain a mixture. Add the mixture to the pelleting barrel. The pusher plate and anti-blocking component move axially synchronously to push the mixture through the conical hole and cut it through the cutting mechanism to obtain granulated medicine. The particle size of the granulated medicine and the granulated feed are consistent.

[0017] (3) When the pusher plate and the anti-blocking component move to the right end of the granulation mold, the pusher plate stops moving and the anti-blocking component continues to move along the conical hole. During the movement of the anti-blocking component, the elastic support shrinks, so that the left end of the flexible outer sleeve is attached to the inner wall of the conical hole, and the residual mixture in the conical hole is pushed out.

[0018] (4) Add the granular medicine evenly into the granular feed.

[0019] Further, in step (3), the elastic support shrinks as follows: as the central rod moves, the inner wall of the conical hole shortens the elastic telescopic rod, which in turn causes the end of the arc spring plate to slide circumferentially, reducing the length of the arc spring plate between the two elastic telescopic rods, reducing the outer diameter of the left end of the flexible jacket, and making it adhere to the inner wall of the conical hole.

[0020] The beneficial effects of this invention are:

[0021] The pelleting die of this invention consists of several axially stacked pelleting plate assemblies, and the pelleting holes on the same axis form a continuous conical hole. This allows for easy adjustment of the number of pelleting plates according to the size of the feed pellets. Furthermore, the larger inner diameter of the feed inlet of the conical hole facilitates the mixing of materials into the conical hole for extrusion molding. Simultaneously, the anti-clogging component, through the cooperation of an elastic support and a flexible outer sleeve, can adjust the outer diameter of the left end of the flexible outer sleeve according to the change of the inner diameter of the conical hole, allowing it to move closely against the inner wall of the conical hole and preventing residual adhering materials. This invention is suitable for preparing feed pellets of different sizes and can effectively prevent clogging in all cases.

[0022] The elastic support component of this invention comprises an elastic telescopic rod and an arc-shaped spring sheet assembly. The elastic telescopic rod supports the arc-shaped spring sheet. As the inner diameter of the tapered hole changes, the length of the elastic telescopic rod also changes, thereby causing the end of the arc-shaped spring sheet to slide circumferentially. The overlapping portion of the ends of two adjacent arc-shaped spring sheets is adjusted accordingly, causing the length of the arc-shaped spring sheet between the two elastic telescopic rods to change. The arc-shaped spring sheet supports the left edge of the flexible outer sleeve, making it fit tightly against the inner wall of the tapered hole to avoid residual material mixing. The compression spring facilitates keeping the flexible outer sleeve in a tensioned state.

[0023] This application involves mixing drugs with feed additives and granulating them to obtain granulated drugs. The particle size of the granulated drugs is the same as that of the feed particles or slightly smaller than that of the feed particles. Based on the principle that particles of the same or slightly smaller particle size can mix without stratification, the prepared granulated drugs are uniformly added to the granulated feed to prevent drug stratification and waste, and to prevent drug poisoning in pigs. This allows pigs to receive timely prevention and treatment, thereby improving production efficiency, reducing drug waste, and lowering feed costs. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the granulation mold.

[0027] Figure 3 This is a schematic diagram of the feeding mechanism;

[0028] Figure 4 This is a schematic diagram of the anti-blocking component.

[0029] Figure 5 Here are schematic diagrams of the first and second sliding holes;

[0030] Figure 6 This is a schematic diagram of the structure of an elastic telescopic rod;

[0031] Figure 7 This is a schematic diagram of the structure of an arc-shaped spring sheet;

[0032] Figure 8 This is a schematic diagram of the cutting-off mechanism.

[0033] 1. Granulation barrel; 2. Granulation plate; 3. Conical hole; 4. Screw; 5. Pusher plate; 6. Conical through hole; 7. Anti-clogging component; 8. Center rod; 9. Flexible outer sleeve; 10. Elastic telescopic rod; 11. First sliding hole; 12. Second sliding hole; 13. Arc-shaped spring sheet; 14. Limiting block; 15. Compression spring; 16. Telescopic cylinder; 17. Intermediate plate; 18. Guide rod; 19. Limiting block; 20. First support spring; 21. Motor; 22. Elastic telescopic rotating shaft; 23. Inner rod; 24. Outer cylinder; 25. Second support spring; 26. Sliding sleeve. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] The terms "left" and "right" in this invention are relative to... Figure 1 The positional relationship is shown.

[0036] Example 1

[0037] like Figure 1 , 2 As shown in Figure 8, a pellet mill for pig farm feed and medication includes a pelleting barrel 1. The right end of the pelleting barrel 1 is equipped with an axially movable pushing mechanism, and the left end is equipped with a pelleting mold. The left end of the pelleting mold is equipped with a cutting mechanism. The pelleting mold includes several axially stacked pelleting plates 2. Multiple pelleting holes are arranged axially on the pelleting plates 2. The pelleting holes on the same axis form a continuous conical hole 3, with the right end of the conical hole 3 having a larger diameter. The edges of the pelleting plates 2 are provided with axial connecting holes. A screw 4 passes through several axial connecting holes of the pelleting plates 2 and connects to the pelleting barrel 1. The pelleting plates 2 can be disassembled by removing the screw 4.

[0038] The inner diameter of the left end of the conical hole 3 matches the particle size requirement of the feed pellets. Therefore, the number of pelleting plates 2 can be determined according to the particle size requirement of the feed pellets. If the particle size of the feed pellets is large, the number of pelleting plates 2 stacked on the left side is reduced. If the particle size of the feed pellets is small, the number of pelleting plates 2 stacked on the left side is increased.

[0039] like Figure 3 and 4 As shown, the feeding mechanism includes a feeding plate 5, on which there are conical through holes 6 corresponding to the granulation holes one by one. The left end of the conical through hole 6 is the end with a larger diameter, and it is consistent with the inner diameter of the right end of the conical hole 3. An axially movable anti-blocking component 7 is provided in the conical through hole 6. The anti-blocking component 7 includes a central rod 8. An elastic support is provided at the left end of the central rod 8. A flexible outer sleeve 9 is fitted on the outside of the elastic support. The flexible outer sleeve 9 is made of wear-resistant cloth or wear-resistant elastic rubber sleeve, etc.

[0040] like Figure 4-7As shown, the elastic support includes radially arranged elastic telescopic rods 10. Multiple elastic telescopic rods 10 are evenly distributed circumferentially along the left end of the central rod 8. One end of each elastic telescopic rod 10 is fixedly connected to the central rod 8, and the other end is a free end. The free end of each elastic telescopic rod 10 is provided with a first sliding hole 11 and a second sliding hole 12. Both the first and second sliding holes 11 are circumferentially arranged. The first sliding hole 11 is located inside the second sliding hole 12. One end of an arc-shaped spring sheet 13 slides through the first sliding hole 11 of the elastic telescopic rod 10, and the other end slides through the second sliding hole 12 of the adjacent elastic telescopic rod 10. This structure ensures that one end of the arc-shaped spring sheet 13 is located outside the adjacent arc-shaped spring sheet 13, and the other end is located inside the adjacent arc-shaped spring sheet 13. The arc-shaped spring sheet 13 slides circumferentially along the first sliding hole 11 and the second sliding hole 12. Limiting blocks 14 are fixed to the ends of the arc-shaped spring sheets 13 to prevent them from falling out of the corresponding sliding holes.

[0041] The left end of the flexible jacket 9 is a closed end, which is fitted onto the outside of the arc-shaped spring plate 13. The arc-shaped spring plate 13 is supported by the elastic telescopic rod 10, and the arc-shaped spring plate 13 is used to support the edge of the left end of the flexible jacket 9, so that it fits tightly against the inner wall of the conical hole 3 or the conical through hole 6. The inner side of the right end of the flexible jacket 9 is connected to the sliding sleeve 26, which is slidably fitted onto the central rod 8. The elastic support also includes a compression spring 15, which is fitted onto the central rod 8. The left end of the compression spring 15 abuts against the elastic telescopic rod 10, and the right end abuts against the sliding sleeve 26. The compression spring 15 keeps the flexible jacket 9 in a tensioned state. When the elastic telescopic rod 10 extends, the outer diameter of the left end of the flexible jacket 9 increases, and its right end moves to the left, compressing the compression spring 15; when the elastic telescopic rod 10 retracts, the outer diameter of the left end of the flexible jacket 9 decreases, the compression spring 15 extends, and the right end of the flexible jacket 9 moves to the right.

[0042] The anti-blocking component 7 moves along the conical hole 3, pushing out the residual mixture inside the conical hole 3. During the movement of the anti-blocking component 7, the elastic support shrinks in the following way: As the central rod 8 moves, the inner diameter of the conical hole 3 decreases, the inner wall of the conical hole 3 shortens the elastic telescopic rod 10, and drives the end of the arc spring plate 13 to slide circumferentially, so that the length of the arc spring plate 13 between the two elastic telescopic rods 10 decreases, the outer diameter of the left end of the flexible jacket 9 decreases, and it comes into contact with the inner wall of the conical hole 3, the compression spring 15 extends, and the right end of the flexible jacket 9 moves to the right, so that the flexible jacket 9 is in a tensioned state.

[0043] A method for adding medicine to pig farm feed, using the aforementioned pellet mill, includes the following steps:

[0044] (1) Determine the number of stacked pelleting plates 2 according to the particle size of the pellet feed, so that the inner diameter of the left end of the conical hole 3 is consistent with the required particle size of the pellet feed.

[0045] (2) Add the medicine and feed additives into the mixer in a set ratio and mix them evenly to obtain a mixture. The mixing method is existing technology and will not be described in detail here. Add the mixture into the pelleting barrel 1. The pusher plate 5 and the anti-blocking component 7 move axially synchronously to push the mixture through the conical hole 3 and cut it through the cutting mechanism to obtain granulated medicine. This process does not change the efficacy of the medicine, but only changes its shape. Moreover, the particle size of the granulated medicine and the granulated feed are consistent.

[0046] (3) When the pusher plate 5 and the anti-blocking component 7 move to the right end of the granulation mold, the pusher plate 5 stops moving, the anti-blocking component 7 extends out of the conical through hole 6 and continues to move along the conical hole 3. During the movement of the anti-blocking component 7, the elastic support shrinks, so that the left end of the flexible outer jacket 9 is attached to the inner wall of the conical hole 3, and pushes out the residual mixture in the conical hole 3.

[0047] (4) Add the prepared granular drug to the existing feed line dosing device. Based on the principle that the same granular drug and granular feed are mixed without separation, the granular drug is evenly added to the feed pellets transported by the feed line pipeline. This will enable the pig farm to use drugs in a timely and accurate manner, reduce labor intensity, reduce drug waste, and lower feeding costs. Moreover, the drug is added evenly to prevent drug poisoning incidents and enable pigs to receive timely prevention and treatment.

[0048] Example 2

[0049] This embodiment is basically the same as Embodiment 1, except that, as Figure 2 As shown, the right edges of adjacent conical holes 3 are connected, so that the mixture can enter the conical hole 3, reducing the dead angle of pushing material, and thus reducing the amount of mixture residue in the granulation barrel 1.

[0050] Example 3

[0051] This embodiment is basically the same as embodiment 1 or 2, except that, as Figure 3 As shown, the pushing mechanism also includes a telescopic cylinder 16, which can be an electric push rod, a telescopic cylinder, a hydraulic cylinder, etc. The left end of the telescopic cylinder 16 is connected to the intermediate plate 17. Multiple guide rods 18 are provided between the intermediate plate 17 and the pushing plate 5. The guide rods 18 are offset from the right end of the tapered through hole 6. The left end of the guide rod 18 is fixedly connected to the pushing plate 5. The right end of the guide rod 18 slides through the intermediate plate 17 and is fixedly connected to the limit block 19. A first support spring 20 is fitted on the guide rod 18 between the intermediate plate 17 and the pushing plate 5. The right end of the center rod 8 passes through the tapered through hole 6 and is fixedly connected to the intermediate plate 17.

[0052] When the telescopic cylinder 16 extends, it drives the anti-blocking component 7 and the pusher plate 5 to move synchronously through the intermediate plate 17. When it moves to the right end face of the granulation mold, the pusher plate 5 stops moving, the telescopic cylinder 16 continues to extend, the first support spring 20 is compressed, the anti-blocking component 7 extends out of the conical through hole 6 and continues to move along the conical hole 3.

[0053] like Figure 1 and 8 As shown, the cutting mechanism includes an elastic telescopic shaft 22 driven by a motor 21. The elastic telescopic shaft 22 includes an inner rod 23 and an outer cylinder 24. The left end of the inner rod 23 is connected to the motor 21, and the right end slides axially within the outer cylinder 24. An axial groove is provided on the inner rod 23. A limit rod is fixed inside the outer cylinder 24, and the limit rod is placed within the axial groove, so that the inner rod 23 can only move axially relative to the outer cylinder 24. The inner rod 23 drives the outer cylinder 24 to rotate circumferentially. A second support spring 25 is fitted on the inner rod 23. The right end of the outer cylinder 24 is connected to a scraper, which is located at the left end of the granulation mold. The length of the elastic telescopic shaft 22 is adjusted according to the number of granulation plates 2, so that the scraper is always in close contact with the left end of the granulation mold. The motor 21 drives the elastic telescopic shaft 22 to rotate, which in turn drives the scraper to rotate, cutting the extruded granular drug.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A granulator for pig farm feed medicating, comprising a granulating barrel, an axially moving pushing mechanism is arranged at the right end of the granulating barrel, a granulating die is arranged at the left end of the granulating barrel, and a cutting mechanism is arranged at the left end of the granulating die, characterized in that: The granulating die comprises a plurality of axially stacked granulating plates, the granulating plates are provided with granulating holes in the axial direction, the granulating holes on the same axis form a continuous conical hole, and the right end of the conical hole is the larger-diameter end; The pushing mechanism comprises a pushing plate, the pushing plate is provided with a conical through hole corresponding to the granulating hole, the left end of the conical through hole is the larger-diameter end, and the inner diameter of the right end of the conical hole is consistent with that of the conical through hole, the conical through hole is provided with an axially movable anti-blocking component, the anti-blocking component comprises a central rod, the left end of the central rod is provided with an elastic support, and the outer side of the elastic support is sleeved with a flexible sleeve; A pig farm feed medicating method adopts the granulator, and comprises the following steps: (1) according to the particle size of the granular feed, the number of stacked granulating plates is determined, so that the inner diameter of the left end of the conical hole is consistent with the particle size of the required granular feed; (2) the medicine and feed additives are uniformly mixed in a mixer to obtain a mixture, the mixture is added into a granulating barrel, the pushing plate and the anti-blocking component are synchronously axially moved, the mixture is pushed to pass through the conical hole, and is cut off by the cutting mechanism to obtain granular medicine, the particle size of the granular medicine is consistent with that of the granular feed; (3) when the pushing plate and the anti-blocking component move to the right end of the granulating die, the pushing plate stops moving, the anti-blocking component continues to move along the conical hole, in the moving process of the anti-blocking component, the elastic support is contracted, the left end of the flexible sleeve is attached to the inner wall of the conical hole, and the residual mixture in the conical hole is pushed out; (4) the granular medicine is evenly added into the granular feed.

2. A granulator for medicating pig feed according to claim 1, characterised in that: The elastic support comprises radially arranged elastic expansion rods, a plurality of elastic expansion rods are circumferentially and uniformly arranged at the left end of the central rod, one end of the elastic expansion rod is fixedly connected with the central rod, the other end is a free end, and the free ends of adjacent elastic expansion rods are provided with circumferentially sliding arc-shaped spring sheets.

3. A granulator for medicating pig feed according to claim 2, characterised in that: The inner side of the right end of the flexible sleeve is connected with a sliding sleeve, the sliding sleeve is slidably sleeved on the central rod, the elastic support further comprises a compression spring, the compression spring is sleeved on the central rod, the left end of the compression spring abuts against the elastic expansion rod, and the right end of the compression spring abuts against the sliding sleeve.

4. A feed medicator for a pig farm according to claim 2 or 3, characterized in that: The free end of the elastic expansion rod is provided with a first sliding hole and a second sliding hole, the first sliding hole and the second sliding hole are circumferentially arranged, the first sliding hole is located on the inner side of the second sliding hole, one end of the arc-shaped spring sheet slides through the first sliding hole, and the other end slides through the second sliding hole of the adjacent elastic expansion rod.

5. A granulator for medicating pig feed according to claim 2, characterised in that: The pushing mechanism further comprises a telescopic cylinder, the left end of the telescopic cylinder is connected with an intermediate plate, a plurality of guide rods are arranged between the intermediate plate and the pushing plate, the left end of the guide rod is fixedly connected with the pushing plate, the right end of the guide rod slides through the intermediate plate and is fixedly connected with a limiting block, a first supporting spring is sleeved on the guide rod, the right end of the central rod passes through the conical through hole and is fixedly connected with the intermediate plate.

6. A granulator for medicating pig feed according to claim 1, characterised in that: The right end edges of adjacent conical holes are connected.

7. A granulator for medicating pig feed according to claim 1 wherein: The cutting mechanism comprises an elastic expansion rotating shaft driven by a motor, the right end of the elastic expansion rotating shaft is connected with a scraper, and the scraper is located at the left end of the granulating die.

8. A granulator for medicating pig feed according to claim 1, wherein In step (3), the elastic support is contracted in the following manner: with the movement of the central rod, the inner wall of the conical hole shortens the elastic expansion rod, and further drives the end of the arc-shaped spring sheet to slide circumferentially, so that the length of the arc-shaped spring sheet between the two elastic expansion rods is reduced, the outer diameter of the left end of the flexible sleeve is reduced, and the left end of the flexible sleeve is attached to the inner wall of the conical hole.

Images