Water pump with intelligent detection and early warning functions

Abstract

The invention relates to the technical field of water pumps, in particular to a water pump with intelligent detection and early warning functions, which comprises a water pump main body, a motor main body is arranged outside the water pump main body, and a water-free detection device is arranged outside a bearing position of the water pump main body; a water-free detection device is arranged in the water pump body, a first vibration detection device and a second vibration detection device are arranged on the two sides of the exterior of the water-free detection device correspondingly, and temperature detection devices are arranged on the exterior of the first vibration detection device and the exterior of the second vibration detection device correspondingly. When the vibration amplitude and frequency of the bearing position of the water pump body are too large, real-time alarming is carried out, the temperature generated by overflowing of the bearing position of the water pump body can be detected through the arranged temperature detection device, alarming is carried out when the temperature is too high, and real-time detection and alarming are carried out on different states of water existence or no water during operation of the water pump body. And the use safety of the water pump main body is effectively improved.

Description

Technical Field

[0001] This invention relates to the technical field of water pumps, and in particular to a water pump with intelligent detection and early warning functions. Background Technology

[0002] A water pump is a machine that transports or pressurizes liquids. It transfers the mechanical energy of a prime mover or other external energy to the liquid, increasing the liquid's energy. It is mainly used to transport liquids including water, oil, acids and alkalis, emulsions, suspensions, and liquid metals. It can also transport liquid-gas mixtures and liquids containing suspended solids. Technical parameters of water pump performance include flow rate, suction head, discharge head, shaft power, water power, and efficiency. In actual operation, water pumps are affected by bearing vibration, pump body temperature, and the presence or absence of water flow inside the pump. When there is no water flow inside the pump, the impeller spins dry, causing the mechanical seal to be damaged due to excessive friction temperature. Therefore, there is an urgent need for a structure with intelligent detection and early warning functions for water pumps. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, this invention provides a water pump with intelligent detection and early warning functions.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a water pump with intelligent detection and early warning functions, including a water pump body, a motor body disposed outside the water pump body, a waterless detection device disposed outside the bearing position of the water pump body for detecting the water flow state inside the water pump housing, a first vibration detection device and a second vibration detection device disposed on both sides outside the waterless detection device for detecting the vibration of the water pump body, a temperature detection device disposed outside the first vibration detection device and the second vibration detection device for checking the overall temperature of the water pump body, a connecting flange disposed outside the water pump body for connecting with external equipment, and an offset detection device disposed outside the connecting flange for monitoring the offset state. The waterless detection device, temperature detection device, first vibration detection device, second vibration detection device, and offset detection device are used to monitor the overall status of the water pump body in real time and provide timely warnings based on the status of the water pump body.

[0005] As a preferred embodiment of the present invention, the connecting flange is replaced with a quick-connect assembly. The quick-connect assembly includes a short-connect flange, which is fixedly connected to the outside of the water pump body. The outside of the short-connect flange is provided with several pre-connected threaded slots for placing bolts. Each pre-connected threaded slot is provided with a pre-connected stud for guiding the pre-placement of the bolt. The pre-connected stud is spirally inserted into the inside of the pre-connected threaded slot and threadedly connected to the pre-connected threaded slot. Each pre-connected stud is fixedly connected to a rotating base plate. The outside of the rotating base plate is fixedly connected with several outer ring short-connected toothed plates. The outside of the rotating base plate is provided with a limiting through hole, which is opened on the outside of the rotating base plate and extends into the inside of the pre-connected stud.

[0006] As a preferred embodiment of the present invention, a positioning assembly is provided on the outside of the short-connection flange. The positioning assembly includes four positioning connecting pins, all of which are fixedly connected to the outside of the short-connection flange. A lateral outer plate positioning support is fixedly connected to one end of the four positioning connecting pins away from the short-connection flange. The lateral outer plate positioning support is suspended on the outside of the short-connection flange by the four positioning connecting pins. A pre-connection screw groove adapted to the number of pre-connection studs is fixedly connected to the outside of the lateral outer plate positioning support. The shape and size of the pre-connection screw groove are adapted to the shape and size of the limiting through hole. The pre-connection screw groove is movably connected inside the limiting through hole, and the rotating base plate is sleeved on the outside of the pre-connection screw groove through the limiting through hole. The pre-connected stud and the rotating base plate are limited by the outward support limiting rod, so that the pre-connected stud and the rotating base plate rotate outside the outward support limiting rod during rotation. This ensures the stable spiral transmission effect of the pre-connected stud and the rotating base plate into the pre-connected screw groove. At the same time, the lateral outer plate positioning support plate limits the distance of the rotating base plate from disengaging from the short-connection flange, preventing the rotating base plate from completely separating from the pre-connected stud and the short-connection flange, thus ensuring the stable implementation of this device.

[0007] In a preferred embodiment of the present invention, the short-connecting flange is provided with an auxiliary annular sleeve plate for connecting with several rotating base plates. The auxiliary annular sleeve plate has several equally spaced inner diameter connecting toothed slots arranged in a ring. These inner diameter connecting toothed slots mesh with an outer ring short-connecting toothed plate. The auxiliary annular sleeve plate and the inner diameter connecting toothed slots are fitted over the several rotating base plates. Rotation of the auxiliary annular sleeve plate drives the inner diameter connecting toothed slots, causing the several rotating base plates to rotate synchronously. An internal support positioning collar plate is fixedly connected to the outside of the short-connecting flange. The external side of the internal support positioning collar plate has an inner ring connecting groove. An external support positioning collar plate is fixedly connected to the outside of the short-connecting flange. The external support positioning collar plate is located near one side of the short-connecting flange. The side is open. An outer ring connecting groove is opened on the side of the outer support positioning collar plate near the inner support positioning collar plate. A sleeve-shaped connecting plate is fixedly connected to the side of the auxiliary annular sleeve plate near the outer support positioning collar plate. An outer ring connecting ring plate is fixedly connected to the outside of the sleeve-shaped connecting plate. The outer ring connecting ring plate is movably connected inside the outer ring connecting groove. An inner ring connecting ring plate is fixedly connected to the side of the sleeve-shaped connecting plate near the short-connection flange. The inner ring connecting ring plate is movably connected inside the inner ring connecting groove. The sleeve-shaped connecting plate rotates stably outside the short-connection flange through the outer ring connecting ring plate and the inner ring connecting ring plate. The auxiliary annular sleeve rotates synchronously and stably outside the short-connection flange through the limitation of the sleeve-shaped connecting plate.

[0008] Compared with the prior art, the beneficial effects that this invention can achieve are: 1. By setting up a waterless detection device to monitor the water flow status inside the water pump body, the pump body is prevented from starting or running continuously without water. At the same time, a first vibration detection device and a second vibration detection device monitor the vibration of the bearing positions of the water pump body. When the vibration amplitude and frequency of the bearing positions of the water pump body are too large, a real-time warning is issued simultaneously. A temperature detection device can detect the temperature generated by overflow in the bearing positions of the water pump body. When the temperature is too high, an alarm is triggered. The temperature and vibration detection are set independently, and an alarm will be triggered if either one is abnormal. By monitoring and issuing warnings in real time for different states of vibration and temperature during the operation of the water pump body, the safety of the water pump body during use is effectively improved.

[0009] 2. When connecting to external devices, the quick-connect assembly, with its external and internal support positioning collar plates, limits the rotation of the outer and inner ring connecting ring plates, ensuring stable rotation of the sleeve-shaped connecting plate. Several rotating base plates move from inside the pre-connection screw groove to the outside of the short-connection flange, causing the pre-connection stud to move to a position close to the outside of the short-connection flange. This facilitates quick threaded connection of the bolts with the pre-connection stud, achieving the effect of quickly connecting external devices.

[0010] 3. By rotating the auxiliary annular sleeve plate in the opposite direction as described above, the auxiliary annular sleeve plate drives the rotating base plate and causes several pre-connected studs to rotate synchronously in the opposite direction. The pre-connected studs are spirally driven inside the pre-connected stud slots and disengage from the interior of the pre-connected studs. At this time, the short-connection flange can be quickly disconnected from the externally connected device, thereby achieving the effect of quick disassembly.

[0011] 4. By setting a lateral outer plate positioning support outside the short-connection flange, and using an outward support limiting rod to limit the pre-connected stud and rotating base plate, the pre-connected stud and rotating base plate rotate outside the outward support limiting rod during rotation. This ensures the stable spiral transmission effect of the pre-connected stud and rotating base plate into the pre-connected screw groove. At the same time, the lateral outer plate positioning support limits the distance the rotating base plate can disengage from the short-connection flange, preventing the rotating base plate and pre-connected stud from completely separating from the short-connection flange, thus ensuring the stable implementation of this device. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the main body of the water pump of the present invention; Figure 2 This is a schematic diagram of the structure of the short-connection flange of the present invention; Figure 3 This is a partial cross-sectional view of the short-connection flange of the present invention; Figure 4 This is a schematic diagram of the structure of the lateral outer disk positioning support plate of the present invention; Figure 5 This is a schematic diagram of the structure of the sleeve-shaped connecting plate of the present invention; Figure 6 This is a schematic diagram of the structure of the auxiliary annular sleeve plate of the present invention; Figure 7 This is a rear view schematic diagram of the external support positioning collar plate of the present invention; Figure 8 This is a rear view schematic diagram of the rotating base plate of the present invention.

[0013] The components are as follows: 10. Pump body; 11. Motor body; 12. Main shaft swing device; 13. No water detection device; 14. Temperature detection device; 15. First vibration detection device; 16. Second vibration detection device; 17. Offset detection device; 18. Connecting flange; 20. Short-connecting flange; 21. Pre-connected threaded groove; 22. Pre-connected stud; 23. Rotating base plate; 24. Limiting through hole; 25. Outer ring short-connecting toothed plate; 30. Positioning connecting pin; 31. Lateral outer plate positioning support plate; 32. Outer support limiting through rod; 40. Assisting annular sleeve plate; 41. Inner diameter connecting toothed groove; 42. External support positioning collar plate; 43. Outer ring connecting groove; 44. Outer ring connecting ring clamping plate; 45. Sleeve-shaped connecting clamping plate; 46. Inner ring connecting ring clamping plate; 47. Inner ring connecting groove; 48. Internal support positioning collar plate. Detailed Implementation

[0014] To make the technical means, creative features, and achieved objectives and effects of this invention easier to understand, the invention is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this invention. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.

[0015] Example: Figure 1 As shown, a water pump with intelligent detection and early warning functions includes a water pump body 10. A main shaft swing device 12 is disposed outside the water pump body 10 to detect the shaft offset state of the water pump body 10. A motor body 11 is disposed outside the water pump body 10. A waterless detection device 13 for detecting the water flow state inside the water pump housing is disposed outside the bearing position of the water pump body 10. A first vibration detection device 15 and a second vibration detection device 16 for detecting the vibration of the water pump body 10 are respectively disposed on both sides of the waterless detection device 13. Both the first vibration detection device 15 and the second vibration detection device 16 are provided with external features for inspection. The pump body 10 is equipped with a temperature detection device 14 for overall temperature detection. The pump body 10 is externally provided with a connecting flange 18 for connecting to external equipment. The connecting flange 18 is externally provided with a displacement detection device 17 for displacement status monitoring. The waterless detection device 13, temperature detection device 14, first vibration detection device 15, second vibration detection device 16 and displacement detection device 17 are configured to monitor the overall status of the pump body 10 in real time and provide early warnings based on the status of the pump body 10. The displacement detection device 17 is used to monitor the overall vibration displacement status of the pump body 10 and to provide early warnings for the vibration displacement status of the pump body 10. By setting a waterless detection device 13 to detect the water flow status inside the water pump body 10, whether there is water or not, the water pump body 10 is prevented from starting or running continuously in a waterless state. At the same time, the first vibration detection device 15 and the second vibration detection device 16 respectively detect the vibration of the bearing position of the water pump body 10. When the vibration amplitude and frequency of the bearing position of the water pump body 10 are too large, a real-time warning is issued. The temperature detection device 14 can detect the temperature generated by the overflow of the bearing position of the water pump body 10. When the temperature is too high, an alarm is issued. The waterless detection device 13, temperature detection device 14, first vibration detection device 15, second vibration detection device 16 and offset detection device 17 are all set in an independent state. Any abnormality will trigger an alarm. By detecting and issuing warnings in real time the different states of vibration and temperature of the water pump body 10 during operation, the safety of the water pump body 10 during use is effectively improved.

[0016] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the connecting flange 18 is replaced with a quick-connect assembly. The quick-connect assembly includes a short-connect flange 20, which is fixedly connected to the outside of the water pump body 10. The short-connect flange 20 has several pre-connected screw slots 21 for placing bolts on its outside. Each pre-connected screw slot 21 has a pre-connected stud 22 for guiding the pre-placement of bolts inside. The pre-connected stud 22 spirals into the inside of the pre-connected screw slot 21 and is threadedly connected to the pre-connected screw slot 21. Each pre-connected stud 22 is fixedly connected to a rotating base plate 23 on its outside. Several outer ring short-connected toothed plates 25 are fixedly connected to the outside of the rotating base plate 23. The rotating base plate 23 has a limiting through hole 24 on its outside, which extends into the inside of the pre-connected stud 22. A positioning assembly is provided on the outside of the short-connecting flange 20. The positioning assembly includes four positioning connecting pins 30. All four positioning connecting pins 30 are fixedly connected to the outside of the short-connecting flange 20. A lateral outer plate positioning support plate 31 is fixedly connected to the end of the four positioning connecting pins 30 away from the short-connecting flange 20. The lateral outer plate positioning support plate 31 is suspended on the outside of the short-connecting flange 20 by the four positioning connecting pins 30. A pre-connecting screw slot 21 adapted to the number of pre-connecting studs 22 is fixedly connected to the outside of the lateral outer plate positioning support plate 31. The shape and size of the pre-connecting screw slot 21 are adapted to the shape and size of the limiting through hole 24. The pre-connecting screw slot 21 is movably connected inside the limiting through hole 24, and the rotating base plate 23 is sleeved on the outside of the pre-connecting screw slot 21 through the limiting through hole 24. The short-connect flange 20 is externally provided with an auxiliary annular sleeve 40 for linkage with several rotating base plates 23. The auxiliary annular sleeve 40 has several annularly arranged, equally spaced inner diameter connecting toothed slots 41 inside. These inner diameter connecting toothed slots 41 mesh with the outer annular short-connect toothed plate 25. The width of the auxiliary annular sleeve 40 is greater than the width of the rotating base plate 23 and the limiting through hole 24. The auxiliary annular sleeve 40 and the inner diameter connecting toothed slots 41 are fitted onto the outside of the several rotating base plates 23. Rotation of the auxiliary annular sleeve 40 drives the inner diameter connecting toothed slots 41, causing the several rotating base plates 23 to rotate synchronously. An internal support positioning collar plate 48 is fixedly connected to the outside of the short-connect flange 20. The internal support positioning collar plate 48 has an inner annular connecting slot 47 on its outside. An external support positioning collar plate 42 is also fixedly connected to the outside of the short-connect flange 20. The external support positioning collar plate 42 is close to the short-connect flange. One side of the flange 20 is open. An outer ring connecting groove 43 is provided inside the outer support positioning collar plate 42 near the inner support positioning collar plate 48. A sleeve-shaped connecting plate 45 is fixedly connected to the outside of the auxiliary annular sleeve plate 40 near the outer support positioning collar plate 42. An outer ring connecting ring plate 44 is fixedly connected to the outside of the sleeve-shaped connecting plate 45. The outer ring connecting ring plate 44 is movably connected inside the outer ring connecting groove 43. An inner ring connecting ring plate 46 is fixedly connected to the outside of the sleeve-shaped connecting plate 45 near the short-connecting flange 20. The inner ring connecting ring plate 46 is movably connected inside the inner ring connecting groove 47. The sleeve-shaped connecting plate 45 rotates stably outside the short-connecting flange 20 through the outer ring connecting ring plate 44 and the inner ring connecting ring plate 46. The auxiliary annular sleeve plate 40 rotates synchronously and stably outside the short-connecting flange 20 through the limitation of the sleeve-shaped connecting plate 45.

[0017] Working principle: In use: When it is necessary to replace the connecting flange 18 with the short-connecting flange 20, the short-connecting flange 20 is installed on the outside of the water pump body 10. When connecting to external devices through it, the auxiliary annular sleeve 40 drives the sleeve-shaped connecting clamp 45 to rotate. The rotation of the sleeve-shaped connecting clamp 45 drives the outer ring connecting ring clamp 44 and the inner ring connecting ring clamp 46 to rotate synchronously. The outer ring connecting ring clamp 44 and the inner ring connecting ring clamp 46 rotate synchronously between the outer support positioning sleeve 42 and the inner support positioning sleeve 48. The outer support positioning sleeve 42 and the inner support positioning sleeve 48 limit the rotation of the outer ring connecting ring clamp 44 and the inner ring connecting ring clamp 46, ensuring the stable rotation of the sleeve-shaped connecting clamp 45. As the sleeve plate 40 rotates, the inner diameter connecting toothed groove 41 inside it meshes with the outer ring short-connecting toothed plate 25. The rotation of the auxiliary ring sleeve plate 40 drives the inner diameter connecting toothed groove 41 and the outer ring short-connecting toothed plate 25, and causes several rotating base plates 23 to rotate in the same direction. The several rotating base plates 23 drive several pre-connected studs 22 to rotate in the same direction and perform helical transmission in the same direction inside the several pre-connected screw grooves 21. The several rotating base plates 23 move from inside the pre-connected screw grooves 21 to the outside of the short-connecting flange 20, so that the pre-connected studs 22 move inside the pre-connected screw grooves 21 to a position close to the outside of the short-connecting flange 20. At this time, it is convenient for the bolt to quickly connect with the pre-connected studs 22, thereby achieving the effect of quickly connecting the external device. After use: By rotating the auxiliary ring sleeve 40 in the opposite direction as described above, the auxiliary ring sleeve 40 drives the rotating base plate 23 and causes several pre-connected studs 22 to rotate synchronously in the opposite direction. The pre-connected studs 22 are spirally driven inside the pre-connected screw groove 21 and disengage from the inside of the pre-connected studs 22. At this time, the short-connection flange 20 can be quickly disconnected from the externally connected device, thereby achieving the effect of quick disassembly. By setting a lateral outer plate positioning support 31 outside the short-connection flange 20, and limiting the pre-connected stud 22 and the rotating base plate 23 by the outward support limiting rod 32, the pre-connected stud 22 and the rotating base plate 23 are kept outside the outward support limiting rod 32 when rotating. This ensures that the pre-connected stud 22 and the rotating base plate 23 can rotate stably into the pre-connected screw groove 21. At the same time, the lateral outer plate positioning support 31 limits the distance that the rotating base plate 23 can separate from the short-connection flange 20, preventing the rotating base plate 23 and the pre-connected stud 22 from the short-connection flange 20 from completely separating, thus ensuring the stable implementation of this device.

[0018] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A water pump with intelligent detection and early warning functions, comprising a water pump body (10), wherein a motor body (11) is disposed outside the water pump body (10), characterized in that, The water pump body (10) is provided with a waterless detection device (13) for detecting the water flow state inside the water pump housing outside the bearing position. On both sides of the waterless detection device (13), a first vibration detection device (15) and a second vibration detection device (16) for detecting the vibration of the water pump body (10) are respectively provided. On the outside of the first vibration detection device (15) and the second vibration detection device (16), a temperature detection device (14) for checking the overall temperature of the water pump body (10) is provided. On the outside of the water pump body (10), a connecting flange (18) for connecting with external equipment is provided. On the outside of the connecting flange (18), an offset detection device (17) for monitoring the offset state is provided. The waterless detection device (13), temperature detection device (14), first vibration detection device (15), second vibration detection device (16) and offset detection device (17) are set up to monitor the overall state of the water pump body (10) in real time and to issue early warnings in a timely manner according to the state of water pump body (10) having water or not having water. The settings of the waterless detection device (13), temperature detection device (14), first vibration detection device (15), second vibration detection device (16) and offset detection device (17) are all independent of each other, and any abnormality will trigger an alarm.

2. A water pump with intelligent detection and early warning function according to claim 1, characterized in that, The connecting flange (18) is replaced with a quick-connect assembly, which includes a short-connect flange (20). The short-connect flange (20) is fixedly connected to the outside of the water pump body (10). The outside of the short-connect flange (20) is provided with several pre-connected screw slots (21) for placing bolts. Each pre-connected screw slot (21) is provided with a pre-connected stud (22) for guiding the pre-placement of bolts. The pre-connected stud (22) spirals into the inside of the pre-connected screw slot (21) and is threadedly connected to the pre-connected screw slot (21).

3. A water pump with intelligent detection and early warning function according to claim 2, characterized in that, Each of the pre-connected studs (22) is fixedly connected to a rotating base plate (23). Several outer ring short-connection toothed plates (25) are fixedly connected to the outside of the rotating base plate (23). A limiting through hole (24) is opened on the outside of the rotating base plate (23) and extends into the interior of the pre-connected stud (22).

4. A water pump with intelligent detection and early warning function according to claim 3, characterized in that, The short-connecting flange (20) is provided with a positioning assembly, which includes four positioning connecting pins (30). The four positioning connecting pins (30) are all fixedly connected to the outside of the short-connecting flange (20). The end of the four positioning connecting pins (30) away from the short-connecting flange (20) is fixedly connected to a lateral outer plate positioning support plate (31). The lateral outer plate positioning support plate (31) is suspended outside the short-connecting flange (20) by the four positioning connecting pins (30).

5. A water pump with intelligent detection and early warning function according to claim 4, characterized in that, The external fixed connection of the lateral outer plate positioning support plate (31) is provided with a pre-connected screw slot (21) that matches the number of pre-connected studs (22). The shape and size of the pre-connected screw slot (21) match the shape and size of the limiting through hole (24). The pre-connected screw slot (21) is movably connected inside the limiting through hole (24), and the rotating base plate (23) is fitted outside the pre-connected screw slot (21) through the limiting through hole (24).

6. A water pump with intelligent detection and early warning function according to claim 5, characterized in that, The short-connecting flange (20) is provided with an auxiliary annular sleeve (40) for connecting with several rotating base plates (23). The auxiliary annular sleeve (40) has several inner diameter connecting toothed grooves (41) arranged in a ring shape. The inner diameter connecting toothed grooves (41) are meshed with the outer ring short-connecting toothed plate (25). The auxiliary annular sleeve (40) and the inner diameter connecting toothed grooves (41) are sleeved on the outside of several rotating base plates (23). The rotation of the auxiliary annular sleeve (40) drives the inner diameter connecting toothed grooves (41) and makes several rotating base plates (23) rotate synchronously.

7. A water pump with intelligent detection and early warning function according to claim 6, characterized in that, The external fixed connection of the short-connecting flange (20) is provided with an internal support positioning collar plate (48), and the external of the internal support positioning collar plate (48) is provided with an inner ring connection groove (47). The external fixed connection of the short-connecting flange (20) is provided with an external support positioning collar plate (42), and the side of the external support positioning collar plate (42) near the short-connecting flange (20) is provided with an opening. The side of the external support positioning collar plate (42) near the internal support positioning collar plate (48) is provided with an outer ring connection groove (43).

8. A water pump with intelligent detection and early warning function according to claim 7, characterized in that, The auxiliary annular sleeve (40) is fixedly connected to a sleeve-shaped connecting plate (45) on the side near the external support positioning sleeve (42). An outer ring connecting plate (44) is fixedly connected to the outside of the sleeve-shaped connecting plate (45). The outer ring connecting plate (44) is movably connected to the inside of the outer ring connecting slot (43). An inner ring connecting plate (46) is fixedly connected to the side near the short-connecting flange (20) on the outside of the sleeve-shaped connecting plate (45). The inner ring connecting plate (46) is movably connected to the inside of the inner ring connecting slot (47). The sleeve-shaped connecting plate (45) rotates stably outside the short-connecting flange (20) through the outer ring connecting plate (44) and the inner ring connecting plate (46). The auxiliary annular sleeve (40) rotates synchronously and stably outside the short-connecting flange (20) through the limiting of the sleeve-shaped connecting plate (45).

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