A fertilizer granule sampling device for fertilizer production
By combining an auxiliary rotating device and a vibration device, the problems of improper fertilizer quantity control and cumbersome operation in fertilizer granule sampling devices are solved, achieving stable sealing and efficient sampling.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- INNER MONGOLIA TONGGUDA BIOTECHNOLOGY CO LTD
- Filing Date
- 2025-08-22
- Publication Date
- 2026-07-21
AI Technical Summary
Existing fertilizer granule sampling devices cannot effectively control the amount of fertilizer during the sampling process, leading to leakage. Furthermore, the operation is cumbersome, requiring repeated pulling of the equipment to loosen the fertilizer.
An auxiliary rotating device was designed to drive the baffle to rotate, and a vibration device was set up to provide vibration force to assist feeding, simplify the operation process, and reduce the risk of leakage.
It achieves stable sealing of the sampling port, ensuring that fertilizer enters the sampling tube smoothly, improving the sufficiency and accuracy of sampling, simplifying the operation steps, and improving work efficiency.
Smart Images

Figure CN224535498U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fertilizer production technology, specifically to a fertilizer granule sampling device for fertilizer production. Background Technology
[0002] Fertilizer granule sampling devices are suitable for periodically or continuously collecting granule samples from the production line to monitor fertilizer quality. This device helps manufacturers identify and correct potential quality problems in the production process in a timely manner, ensuring that the produced fertilizer meets established standards and customer requirements. By collecting granule samples from different parts of the plant, the device can also effectively assess the uniformity of the fertilizer product, providing important data for quality control and product optimization.
[0003] Chinese patent CN220120435U discloses a fertilizer granule sampling device for fertilizer production, relating to the field of fertilizer production technology. It includes a sampling cylinder, a sealing component, and a limiting component. The sampling cylinder has an open end and a closed end, with a storage bin detachably installed at the open end. The sealing component includes a movable rod and two baffles. The movable rod is movably mounted on the sampling cylinder, with one end extending into the cylinder. This invention, through the arrangement of two baffles and two first springs, normally seals the two inlets with pressure. During sampling, the movable rod can be used to open the two inlets, allowing the fertilizer to be sampled to enter the sampling cylinder. Simultaneously, the first springs ensure that the two baffles consistently seal the two inlets under normal conditions, guaranteeing a tight seal. However, there are still shortcomings that can be improved.
[0004] 1. Although two baffles are provided to block the feed inlet in this utility model, there is a significant drawback: the amount of fertilizer that the equipment can load cannot be effectively controlled during the sampling process. When too much fertilizer is loaded, it will interfere with the reset action of the spring and the two baffles, causing them to fail to return to their original positions accurately. This problem weakens the baffles' effective ability to block the feed inlet, which may lead to fertilizer leakage from the feed inlet.
[0005] 2. In this utility model and existing technology, it is usually necessary to insert the device into the fertilizer pile and then move the device back and forth to loosen the surrounding fertilizer, thereby ensuring that more fertilizer can enter the sampling tube. However, this process often increases the cumbersomeness of operation.
[0006] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content
[0007] The technical problem to be solved by this utility model is to overcome the above-mentioned problems and provide a fertilizer granule sampling device for fertilizer production.
[0008] To solve the above-mentioned technical problems, the technical solution provided by this utility model is: a fertilizer granule sampling device for fertilizer production, comprising:
[0009] The outer shell is cylindrical, with open front and rear ends, and a sampling port on the top wall.
[0010] A baffle, which is arc-shaped and whose outer wall fits against the inner wall of the outer shell, is used to seal the sampling port.
[0011] The auxiliary rotation device includes a fixed ring fixedly connected to the rear end of the housing and a rotating plate located behind the fixed ring. The rotation of the rotating plate drives the baffle to rotate.
[0012] A vibration device, which is installed inside the housing, is used to connect the baffle and the rotating plate and to provide vibration force to assist in feeding.
[0013] Preferably, the rear end of the fixed ring is surrounded by a plurality of limiting grooves, the inner wall of the limiting grooves is arc-shaped, and the front end of the rotating plate is provided with at least two equipment grooves, the equipment grooves being provided with limiting units for limiting the rotation plate.
[0014] The limiting unit mainly includes a positioning block inserted into the equipment slot. The front end of the positioning block is designed to be round. By inserting the positioning block into the limiting slot, the rotating plate is limited. The rear end of the positioning block is fixedly connected to a telescopic rod. The rear end of the telescopic rod is fixedly connected to the rear wall of the limiting slot. A shock-absorbing spring is provided around the telescopic rod.
[0015] Preferably, the vibration device includes an equipment compartment rotatably connected to the rear of the inner wall of the outer casing, the rear end of the baffle is fixedly connected to the front end of the equipment compartment, and the rear end of the equipment compartment passes through a fixing ring and is connected to a rotating plate.
[0016] Preferably, a drive motor is provided on the rear wall of the equipment compartment, and a connecting shaft is fixedly connected to the front end of the output shaft of the drive motor. The front end of the connecting shaft is rotatably connected to the front wall of the equipment compartment. Eccentric wheels are fixedly connected to the front and rear parts of the outer wall of the connecting shaft, and the included angle between the eccentric parts of the two eccentric wheels is 120°.
[0017] Preferably, the upper and lower parts of the equipment compartment cavity are provided with pressure plates for use with eccentric wheels. A number of telescopic rods are fixedly connected to the end of the pressure plate away from the eccentric wheel. The telescopic rods are fixedly connected to the inner wall of the equipment compartment. A return spring that can push the pressure plate to reset is provided around the telescopic rods.
[0018] Preferably, a vibrating block is fixedly connected to the middle of the side of the pressure plate away from the eccentric wheel. The pressure plate is displaced by the eccentric wheel, and the vibrating block impacts the inner wall of the outer shell, thereby generating vibration.
[0019] Preferably, the rotating plate is characterized by having a handle fixedly connected to its rear end, and a protective pad being fitted onto the outer wall of the handle.
[0020] Preferably, a tapered cylinder is provided at the front of the outer casing, and a threaded groove is opened on the inner wall of the tapered cylinder. An external threaded sleeve communicating with the inner wall of the outer casing is fixedly connected to the front end of the outer casing. The threaded part of the external threaded sleeve is threadedly connected to the threaded part of the tapered cylinder to realize the function of quick assembly and disassembly.
[0021] The advantages of this utility model compared with the prior art are as follows:
[0022] 1. This utility model is equipped with an auxiliary rotating device to drive the baffle to rotate. The structural design at the sampling port is simpler and will not interfere with the reset of the baffle due to excessive fertilizer particles. At the same time, a limiting unit is set to make the limiting of the baffle more stable, thereby reducing the occurrence of subsequent fertilizer particle leakage.
[0023] 2. This solution incorporates a vibration device. This device generates stable vibration force, effectively loosening the surrounding fertilizer and ensuring more fertilizer can smoothly enter the sampling tube, thus improving the sufficiency and accuracy of sampling. It avoids the cumbersome steps of traditional techniques that require repeatedly pulling the equipment back and forth to loosen the surrounding fertilizer, significantly simplifying the operation process and improving work efficiency. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1 This is a perspective view of the present invention.
[0026] Figure 2 This is a structural diagram of the present invention.
[0027] Figure 3 This is an enlarged view of the present invention at point A.
[0028] Figure 4 This is a structural schematic diagram of the shock absorption device in this utility model.
[0029] Figure 5 This is a structural schematic diagram of the present invention at point B.
[0030] Figure 6 This is a structural diagram of the auxiliary rotating device in this utility model.
[0031] Figure 7 This is an enlarged view of the present invention at point C.
[0032] Figure 8 This is an exploded structural view of the present invention.
[0033] As shown in the figure: 1. Outer shell; 2. Baffle; 3. Fixing ring; 4. Rotating plate; 5. Limiting unit; 6. Positioning block; 7. Telescopic rod one; 8. Shock-absorbing spring; 9. Equipment compartment; 10. Drive motor; 11. Connecting shaft; 12. Eccentric wheel; 13. Pressure plate; 14. Telescopic rod two; 15. Return spring; 16. Vibration block; 17. Handle; 18. Conical cylinder; 19. External threaded sleeve. Detailed Implementation
[0034] The following will refer to the appendix in the embodiments of this utility model. Figure 1 To be continued Figure 8 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0035] Example 1:
[0036] Please pay close attention. Figures 1 to 3 As shown, this utility model provides a fertilizer granule sampling device for fertilizer production, mainly including a shell 1, a baffle 2, an auxiliary rotating device, and a vibration device. The auxiliary rotating device includes a fixed ring 3 and a rotating plate 4, used to drive the baffle 2 to rotate. The shell 1 has an open design at both the front and rear ends, and a sampling port communicating with its inner wall is opened at the front of the top of the shell 1. Fertilizer granules can enter the shell 1 through the sampling port. The baffle 2 is arc-shaped and located inside the shell 1. Its outer wall is precisely fitted with the inner wall of the shell 1. When the baffle 2 rotates around the inner wall of the shell 1, it can close or open the sampling port. The fixed ring 3 of the auxiliary rotating device is fixedly connected to the rear end of the shell 1, and its inner wall is communicating with the inner wall of the shell 1. The rotating plate 4 is located behind the fixed ring 3. The vibration device is located at the rear of the inner cavity of the shell 1, used to connect the baffle 2 and the rotating plate 4 together, and to provide vibration force to improve the efficiency of fertilizer entering the shell 1 quickly.
[0037] Therefore, in the specific implementation process of this embodiment, the device is inserted into the fertilizer pile, the vibration device operates, and provides vibration capability, so that the surrounding fertilizer is loosened and quickly enters the outer shell 1 through the sampling port. Then, the rotating plate 4 on the auxiliary rotating device is rotated, which indirectly drives the baffle 2 to rotate on the inner wall of the outer shell 1. When the arc-shaped baffle 2 blocks the sampling port, the device is pulled out to complete the sampling function.
[0038] It should be noted that baffle 2 has sufficient strength and will not bend or deform.
[0039] Example 2:
[0040] To further clarify and fully explain the vibration device in Embodiment 1 above, this utility model also provides Embodiment 2, which will be discussed in detail below. Figures 2 to 5 As shown, in this second embodiment, the vibration device mainly includes an equipment compartment 9 located at the rear of the inner cavity of the outer shell 1. The outer wall of the equipment compartment 9 is rotatably connected to the inner wall of the outer shell 1 by bearings. The rear end of the baffle 2 is fixedly connected to the front end of the equipment compartment 9, and the rear end of the equipment compartment 9 passes through the fixing ring 3 and is connected to the rotating plate 4. Thus, when the rotating plate 4 rotates, the baffle 2 rotates together with the equipment compartment 9.
[0041] A drive motor 10 is installed on the rear wall of the equipment compartment 9. The drive motor 10 is fixedly connected to the inner wall of the equipment compartment 9 via a motor mount. A mobile power supply that can provide power to the drive motor 10 is fixedly connected to the rear wall of the equipment compartment 9, and the mobile power supply and the drive motor 10 are electrically connected. The output shaft of the drive motor 10 faces forward, and a connecting shaft 11 is fixedly connected to the front end of the output shaft. The front end of the connecting shaft 11 is rotatably connected to the front wall of the equipment compartment 9. Meanwhile, eccentric wheels 12 are fixedly connected to the front and rear parts of the outer wall of the connecting shaft 11.
[0042] The upper and lower parts of the inner cavity of the equipment compartment 9 are equipped with pressure plates 13 that cooperate with the eccentric wheel 12. The side of the pressure plate 13 near the eccentric wheel 12 is arc-shaped to facilitate the rotation of the eccentric wheel 12. Several telescopic rods 14 are fixedly connected to the end of the pressure plate 13 away from the eccentric wheel 12. The telescopic rods 14 are fixedly connected to the inner wall of the equipment compartment 9. The telescopic rods 14 are surrounded by a return spring 15, which can push the pressure plate 13 to return to its original position. The two ends of the return spring 15 are fixedly connected to the pressure plate 13 and the inner wall of the outer shell 1, respectively.
[0043] Finally, a vibrating block 16 is fixedly connected to the middle of the side of the pressure plate 13 away from the eccentric wheel 12. When the vibrating block 16 impacts the inner wall of the equipment compartment 9, it will generate corresponding vibration.
[0044] It should be noted that the included angle between the eccentric parts of the two eccentric wheels 12 is 120°, which ensures that the two vibrating blocks 16 can alternately impact the inner wall of the equipment compartment 9, thereby improving the vibration capability.
[0045] Therefore, in this embodiment, the drive motor 10 drives the connecting shaft 11 to rotate, thereby driving the two eccentric wheels 12 to rotate synchronously. Subsequently, the eccentric part of the rear eccentric wheel 12 contacts the lower pressure plate 13, and as the eccentric wheel 12 continues to rotate, the eccentric part continuously presses the pressure plate 13 downward. When the vibrating block 16 at the bottom of the pressure plate 13 hits the inner wall of the equipment compartment 9 and generates vibration, one vibration process is completed. As the connecting shaft 11 continues to rotate, the eccentric part of the rear eccentric wheel 12 gradually moves away from the lower pressure plate 13. At this time, under the action of the return spring 15, the pressure plate 13 is pushed back to its original position. At the same time, the eccentric part of the front eccentric wheel 12 begins to contact the upper pressure plate 13 and compress it. During this process, the upper vibrating block 16 will also hit the inner wall of the equipment compartment 9 and generate vibration. Through such an alternating vibration process, the nearby fertilizer is effectively loosened, making it easier for the fertilizer particles to pass smoothly through the sampling port into the outer shell 1.
[0046] Example 3:
[0047] In the first embodiment described above, when the device is removed from the fertilizer pile after sampling, the outer casing 1 may rotate unnecessarily relative to the rotating plate 4 due to the influence of the fertilizer pile. This rotation may cause fertilizer leakage during the removal of the device. To solve this problem, this utility model also proposes a third embodiment, which you should carefully review. Figure 6 and Figure 7 As shown, in Embodiment 3, several limiting grooves are first opened at the rear end of the fixed ring 3. It should be noted that the several limiting grooves are evenly arranged around the inner circle of the fixed ring 3, and the inner wall of the limiting groove is arc-shaped. At the same time, at least two equipment slots are opened at the front end of the rotating plate 4. The two equipment slots are symmetrically arranged, and a limiting unit 5 for limiting the rotating plate 4 is provided in each equipment slot.
[0048] The limiting unit 5 mainly includes a positioning block 6 inserted into the equipment slot. The front end of the positioning block 6 is designed with a round head, and its shape is the same as the inner wall of the limiting slot. By inserting the positioning block 6 into the limiting slot, the rotating plate 4 is limited. The rear end of the positioning block 6 is fixedly connected to a telescopic rod 7. The rear end of the telescopic rod 7 is fixedly connected to the rear wall of the limiting slot. Finally, a shock-absorbing spring 8 is provided around the telescopic rod 7 to provide the positioning block 6 with predetermined pressure and reset capability.
[0049] Meanwhile, to ensure smooth displacement of the rounded head at the front end of the positioning block 6 at the rear end of the fixing ring 3 and to reduce wear, an annular groove is provided at the rear end of the fixing ring 3. The shape of the inner wall of this annular groove matches the trajectory formed by the two positioning blocks 6 during their revolution, and the inner wall remains smooth, effectively reducing friction and wear.
[0050] Therefore, when using this invention, it is essential to first ensure that the rotating plate 4 is stationary. At this time, the damping spring 8 provides stable pressure, causing the rounded head at the front end of the positioning block 6 to tightly abut against the limiting groove. This precise fit between the inner wall of the limiting groove and the positioning block 6 effectively reduces unnecessary rotation between the outer shell 1 and the rotating plate 4.
[0051] When the user gradually applies external force exceeding the elastic force of the damping spring 8, the rotating plate 4 begins to rotate. As the rotating plate 4 rotates, the inner wall of the limiting groove applies pressure to the positioning block 6, causing it to gradually move backward. Finally, the round head of the positioning block 6 moves out of the current limiting groove and contacts the inner wall of the annular groove, ensuring the continuity of rotation.
[0052] As the rotating plate 4 continues to rotate, the round head of the positioning block 6 contacts the next limiting groove in sequence and performs a limiting action. This process is repeated to ensure that the relative rotation between the outer shell 1 and the rotating plate 4 is always effectively controlled throughout the entire rotation process.
[0053] Example 4:
[0054] In Embodiments 1 to 3 above, since the outer shell 1 is inserted into the fertilizer pile, it is inconvenient to see the specific position of the baffle 2. To solve this problem, Embodiment 4 is proposed, in which a triangular indicator groove 1 is opened at the center of the top of the fixing ring 3, and the central axis of the indicator groove 1 is parallel to the central axis of the sampling port. At the same time, a triangular indicator groove 2 is opened at the center of the top of the rotating plate 4, and the central axis of the indicator groove 2 is parallel to the central axis of the baffle 2.
[0055] With the above design, when the rotating plate 4 drives the baffle 2 to rotate, the positional relationship between indicator slot one and indicator slot two will change accordingly. Users can intuitively judge the rotation angle and position of baffle 2 by observing the relative positions of these two indicator slots, thereby accurately grasping the opening and closing state of the sampling port and ensuring the accuracy and convenience of sampling.
[0056] Example 5:
[0057] To make the entire device operate more stably and conveniently, Embodiment 5 is proposed. A handle 17 is fixedly connected to the rear end of the rotating plate 4. A protective pad is fitted on the outer wall of the handle 17. In addition, a switch is fixedly connected to the rear end of the handle 17. The switch is electrically connected to the drive motor 10.
[0058] Meanwhile, a tapered cylinder 18 is provided at the front of the outer casing 1. A threaded groove is opened on the inner wall of the tapered cylinder 18. An external threaded sleeve 19 communicating with its inner wall is fixedly connected to the front end of the outer casing 1. The threaded part of the external threaded sleeve 19 is threadedly connected to the threaded part of the tapered cylinder 18.
[0059] In summary, combining Embodiments 1 to 5, the equipment is inserted into the fertilizer pile. Turning handle 17 causes the baffle 2 to rotate via the transmission between the rotating plate 4 and the equipment compartment 9. The position of the baffle 2 is determined by observing the indicator groove 2 on the rotating plate 4. When the baffle 2 no longer blocks the sampling port, fertilizer particles can enter the outer casing 1. Simultaneously, the vibration device operates, and the vibration force generated by the vibrating block 16 is transmitted to the outer casing 1, loosening the nearby fertilizer and improving sampling efficiency. After sampling is completed, the handle 17 is turned in the opposite direction, causing the baffle 2 to return to its original position, aligning indicator groove 1 and indicator groove 2, and the baffle 2 to block the sampling port. Finally, the limiting unit 5 functions to keep the fixing ring 3 and the rotating plate 4 relatively stationary, ensuring equipment stability.
[0060] In summary, the fertilizer granule sampling device for fertilizer production provided by this utility model has at least the following advantages compared to the proposed embodiments:
[0061] 1. This utility model uses a shielding plate 2 to shield the sampling port. Compared with the comparative case, the structure is simpler and the fertilizer particles will not get stuck in the parts, thus affecting the normal operation of the equipment.
[0062] 2. Compared to the user needing to continuously pull the spring to open the feed port, this utility model provides a rotation method, which requires less force, is more convenient for most users, and saves more physical strength. At the same time, a limit unit 5 is set to reduce unnecessary rotation between the rotating plate 4 and the fixed ring 3, making the equipment more stable.
[0063] 3. This solution also provides a vibration device. Compared with the comparative case and even the existing technology, the device needs to be pulled out multiple times to loosen the surrounding fertilizer and allow it to quickly enter the outer shell 1. The operation of this utility model is simpler.
[0064] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.
[0065] In addition, all electrical components mentioned in this article are connected to an external main controller and 220V AC mains power. The main controller can be a conventional known device such as a computer for control. The specific implementation of this disclosure omits detailed descriptions of known functions and known components. To ensure the compatibility of the device, the operating methods used are consistent with the parameters of commercially available instruments.
Claims
1. A fertilizer granule sampling device for fertilizer production, characterized in that, include: A cylindrical outer shell (1) with open front and rear ends, and a sampling port on the top wall of the outer shell (1); Baffle (2), which is arc-shaped and whose outer wall is attached to the inner wall of the outer shell (1), is used to seal the sampling port; The auxiliary rotation device includes a fixed ring (3) fixedly connected to the rear end of the outer shell (1) and a rotating plate (4) located behind the fixed ring (3). The rotation of the rotating plate (4) drives the baffle (2) to rotate. A vibration device is installed inside the housing (1) to connect the baffle (2) and the rotating plate (4) and to provide vibration force to assist in feeding.
2. The fertilizer granule sampling device for fertilizer production according to claim 1, characterized in that: The rear end of the fixed ring (3) is surrounded by several limiting grooves around its inner ring. The inner wall of the limiting groove is arc-shaped. The front end of the rotating plate (4) is provided with at least two equipment slots. The equipment slots are provided with limiting units (5) for limiting the rotating plate (4). The limiting unit (5) mainly includes a positioning block (6) inserted into the equipment slot. The front end of the positioning block (6) is designed to be round. The rotating plate (4) is limited by the positioning block (6) inserted into the limiting slot. The rear end of the positioning block (6) is fixedly connected to a telescopic rod (7). The rear end of the telescopic rod (7) is fixedly connected to the rear wall of the limiting slot. The telescopic rod (7) is surrounded by a shock-absorbing spring (8).
3. The fertilizer granule sampling device for fertilizer production according to claim 1, characterized in that: The vibration device includes an equipment compartment (9) rotatably connected to the rear of the inner wall of the outer shell (1), the rear end of the baffle (2) is fixedly connected to the front end of the equipment compartment (9), and the rear end of the equipment compartment (9) passes through the fixing ring (3) and is connected to the rotating plate (4).
4. A fertilizer granule sampling device for fertilizer production according to claim 3, characterized in that: A drive motor (10) is provided on the rear wall of the equipment compartment (9). A connecting shaft (11) is fixedly connected to the front end of the output shaft of the drive motor (10). The front end of the connecting shaft (11) is rotatably connected to the front wall of the equipment compartment (9). Eccentric wheels (12) are fixedly connected to the front and rear parts of the outer wall of the connecting shaft (11). The included angle between the eccentric parts of the two eccentric wheels (12) is 120°.
5. A fertilizer granule sampling device for fertilizer production according to claim 4, characterized in that: The upper and lower parts of the inner cavity of the equipment compartment (9) are provided with pressure plates (13) for use with eccentric wheels (12). A number of telescopic rods (14) are fixedly connected to the end of the pressure plate (13) away from the eccentric wheel (12). The telescopic rods (14) are fixedly connected to the inner wall of the equipment compartment (9). The telescopic rods (14) are surrounded by a return spring (15) that can push the pressure plate (13) to reset.
6. A fertilizer granule sampling device for fertilizer production according to claim 5, characterized in that: A vibration block (16) is fixedly connected to the middle of the side of the pressure plate (13) away from the eccentric wheel (12). The pressure plate (13) is pushed to move by the eccentric wheel (12), and the vibration block (16) impacts the inner wall of the outer shell (1), thereby generating vibration.
7. A fertilizer granule sampling device for fertilizer production according to any one of claims 1 to 6, characterized in that: The rear end of the rotating plate (4) is fixedly connected to a handle (17), and a protective pad is fitted on the outer wall of the handle (17).
8. A fertilizer granule sampling device for fertilizer production according to claim 1, characterized in that: A tapered cylinder (18) is provided in front of the outer shell (1). A threaded groove is opened on the inner wall of the tapered cylinder (18). An external threaded sleeve (19) communicating with its inner wall is fixedly connected to the front end of the outer shell (1). The threaded part of the external threaded sleeve (19) is threadedly connected to the threaded part of the tapered cylinder (18) to realize the function of quick assembly and disassembly.