Mosquito-proof beef cattle breeding ventilation and heat dissipation shed

Abstract

The application discloses a mosquito-proof beef breeding ventilation and heat dissipation shed, and belongs to the technical field of breeding sheds. The mosquito-proof beef breeding ventilation and heat dissipation shed comprises a breeding shed, a protective fence is installed around the breeding shed, a roller blind frame is distributed around the top of the breeding shed, a mosquito-proof net is wound in each roller blind frame, a wheel frame is symmetrically distributed at both ends of each roller blind frame, a plurality of wheel frames are vertically distributed, a ventilation unit is arranged at the center of the top of the breeding shed, a fan is installed outside the breeding shed, an air outlet of the fan is connected with a pipeline, the other end of the pipeline is connected with the ventilation unit, and the protective fence of the breeding shed is provided with the mosquito-proof net around the breeding shed, which can directly and effectively prevent mosquitoes, the ventilation unit is arranged at the middle position of the top of the breeding shed, the ventilation unit sends external air into each breeding area of the breeding shed to enhance internal ventilation, an air extractor is arranged at each corner of the breeding shed, a wind flow field with central top air supply and four-corner low-position air exhaust is formed, and ventilation dead angles and temperature stratification are eliminated to the maximum.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of breeding sheds, and particularly relates to a mosquito-proof beef cattle breeding ventilation and heat dissipation shed. BACKGROUND

[0002] Ventilation and heat dissipation and mosquito control are core problems in summer breeding management in beef cattle breeding, and traditional breeding sheds simply rely on natural wind or simple fans, air flow is disorganized, and cannot uniformly cover the entire breeding area, so that dead angles of high temperature, high humidity and harmful gas accumulation are easily formed, and in order to prevent insects, insect nets are densely arranged, although mosquitoes are blocked, but the ventilation resistance is greatly increased, resulting in poor heat dissipation, especially in summer, which will aggravate heat stress; and part of the breeding sheds rely on spraying chemical agents to achieve mosquito control, and the chemical agents have the risks of drug residues, causing mosquito resistance and harming livestock and poultry. SUMMARY

[0003] In order to achieve the above-mentioned purpose, the application provides the following technical scheme: a mosquito-proof beef cattle breeding ventilation and heat dissipation shed, comprising: a breeding shed, which is provided with protective fences around; a roller blind frame is distributed around the top of the breeding shed, and an insect screen is wound in each roller blind frame; a wheel frame is symmetrically distributed at both ends of each roller blind frame, and a plurality of wheel frames are vertically distributed; a ventilation unit is arranged at the center of the top of the breeding shed; a fan is arranged outside the breeding shed, and the exhaust port of the fan is connected with a pipeline, the other end of the pipeline is connected with the ventilation unit; and a filter screen is arranged at the air inlet of the fan.

[0004] Preferably, an exhaust fan is arranged outside the breeding shed, and the air inlet of the exhaust fan is located at the four corners of the breeding shed.

[0005] Preferably, the ventilation unit comprises: a wind pipe; an outer fixed pipe is arranged in parallel along the length direction of the breeding shed, one end of the outer fixed pipe is connected with the wind pipe; exhaust elbow pipes are arranged in left and right on the outer fixed pipe and are staggered; and a clean air device is fixed between the wind pipe and the outer fixed pipe.

[0006] Preferably, an auxiliary fan blade is arranged in the exhaust elbow pipe, a plurality of inner rings are arranged in the exhaust elbow pipe, a ring pipe is fixed coaxially on each inner ring, a water mist pipe is connected outside the ring pipe, a plurality of spray heads are circumferentially arranged on the ring pipe; a grille is rotatably arranged at the end of the exhaust elbow pipe, a plurality of fan blades are arranged in the grille, a control motor is arranged outside the exhaust elbow pipe, and the output end of the control motor is connected with the grille through gear meshing.

[0007] As preferred, the net wind device comprises: a pipe body, a cylinder pipe fixed in the inner center of the pipe body; a rotating blade horizontally installed in the cylinder pipe; a connecting pipe fixed in the pipe body and communicated with the cylinder pipe, the other end of the connecting pipe connected with an outer fixed pipe; a support ring slidingly assembled in the cylinder pipe, the support ring is symmetrically arranged in two, the two support rings are respectively connected at the two ends of the rotating blade, a plurality of support rods are fixed on the circumference of the support ring, and each support rod is slidingly connected to the cylinder pipe; and a slide rail frame symmetrically fixed on the inner wall of the cylinder pipe, a sliding block slidingly connected to the slide rail frame, and each sliding block connected with the support ring.

[0008] As preferred, a screw rod is rotationally connected in the slide rail frame, and the sliding block is screw-connected with the screw rod for transmission; the rotating blade is made of a fiber composite material capable of elastically deforming.

[0009] As preferred, a through hole is formed in the inner wall of the cylinder pipe between the two support rings, the cylinder pipe and the pipe body are sealingly configured as an annular guide cavity, the through hole is communicated with the annular guide cavity, a plurality of inner holes are formed in the circumference of the connecting pipe, a plurality of arc-shaped adhesive plates are arranged in the annular guide cavity, and a center ring is slidingly arranged in the cylinder pipe and connected to the middle part of the rotating blade.

[0010] As preferred, a flow guide ring is fixed at one end of the cylinder pipe close to the outer fixed pipe, a plurality of blade plates are distributed on the circumference of the flow guide ring, and one end of each blade plate is hingedly connected with the flow guide ring.

[0011] A transmission rod is hingedly connected in each blade plate, and a connecting rod is coaxially fixed on the support ring, and the other end of each transmission rod is connected with the connecting rod.

[0012] As preferred, the rotating blade is internally provided with a cavity structure, and the cavity is filled with adsorbing cotton, the adsorbing cotton is soaked with an insect repellent, the surface of the rotating blade is provided with capillary micropores, the insect repellent of the adsorbing cotton is evaporated through the capillary micropores, and a transfusion pipe is embedded and connected in the rotating blade.

[0013] As preferred, an axle pressing block is slidingly connected to the middle part of each support ring, a plurality of supporting springs are connected between the axle pressing block and the support ring, a piezoelectric vibrator is fixed in the support ring, and the output end of the piezoelectric vibrator is connected with the axle pressing block.

[0014] Compared with the prior art, the present application has the following advantages:

[0015] The present application is provided with the insect-proof net around the protective fence of the breeding shed, which can directly and effectively prevent mosquitoes, and the ventilation unit is installed at the middle position of the top of the breeding shed, the ventilation unit sends the external wind into each breeding area of the breeding shed to enhance the internal ventilation, and the exhaust fan is arranged at each corner of the breeding shed, so that the wind flow field of the top center air supply and the four corners low exhaust is formed, which maximally eliminates the ventilation dead angle and temperature stratification; the clean wind device mainly arranged in the ventilation unit can guide the new air flow through the spiral leaf, when the mosquitoes and dirt in the new air are more, the spiral leaf can generate axial compression deformation in the sliding adjustment of the two support rings, at this time, the pitch is smaller, the tangential velocity component of the new air flow along the spiral leaf is enhanced, the high-speed rotating vortex is formed in the pipeline, and the mosquitoes and dirt in the new air are thrown to the inner wall of the pipe body under the action of the centrifugal force, and the adhering plate in the pipe body can capture them, so that the new air quality is improved while the high flux of the new air is maintained, the new air is less blocked, and the problem of hindering ventilation of the traditional fixed insect-proof net is solved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the overall structure schematic diagram of the present application;

[0017] Figure 2 It is the structure schematic diagram of the ventilation unit in the present application;

[0018] Figure 3 It is the internal structure schematic diagram of the exhaust elbow in the present application;

[0019] Figure 4 It is the structure schematic diagram of the clean wind device in the present application;

[0020] Figure 5 It is the internal structure schematic diagram of the barrel pipe in the present application;

[0021] Figure 6 It is the sectional view of the flow guide ring and the leaf plate in the present application;

[0022] In the drawing: 1, breeding shed; 11, fan; 12, pipeline; 2, roller blind frame; 21, insect-proof net; 22, wheel frame; 3, ventilation unit; 31, air pipe; 32, outer fixed pipe; 33, exhaust elbow; 34, auxiliary fan blade; 35, ring pipe; 36, spray head; 37, grille; 38, control motor; 4, clean wind device; 41, pipe body; 42, barrel pipe; 43, spiral leaf; 44, connecting pipe; 45, sliding rail frame; 46, sliding block; 47, through hole; 48, inner hole; 49, center ring; 5, support ring; 51, support rod; 52, flow guide ring; 53, leaf plate; 54, transmission rod; 55, connecting rod; 6, shaft pressing block; 61, piezoelectric vibrator. DETAILED DESCRIPTION

[0023] Please refer to Figures 1-6The embodiment of the present application is a mosquito-proof beef breeding ventilation and heat dissipation shed, which comprises a breeding shed 1, a protective fence is installed around the breeding shed 1; a roller shutter frame 2 is distributed around the top of the breeding shed 1, a mosquito-proof net 21 is wound in each roller shutter frame 2, the roller shutter frame 2 can realize automatic lifting of the mosquito-proof net 21 in use, so as to isolate mosquitoes outside the breeding shed 1 in time through the mosquito-proof net 21 in summer; a wheel frame 22 is symmetrically distributed at both ends of each roller shutter frame 2, a plurality of wheel frames 22 are vertically distributed, so that both sides of the mosquito-proof net 21 can be rolled and transmitted through the two groups of wheel frames 22 distributed on the left and right; a ventilation unit 3 is arranged at the center of the top of the breeding shed 1, which is mainly used for sending fresh air into the breeding shed 1; a fan 11 is installed outside the breeding shed 1, an air outlet of the fan 11 is connected with a pipeline 12, the other end of the pipeline 12 is connected with the ventilation unit 3, and the fresh air in the fan 11 can be sent into the ventilation unit 3 through the pipeline 12; a filter screen is installed at the air inlet of the fan 11.

[0024] In the embodiment, an air extractor (not shown in the figure) is arranged outside the breeding shed 1, the air inlet of the air extractor is located at the four corners of the breeding shed 1, the air extractor realizes central top air supply and low corner air exhaust, forms a three-dimensional flow field covering the whole shed in the breeding shed 1, and the fresh air can be uniformly sent to each breeding area and finally exhausted by the air extractors in the four corners, so that the ventilation dead angle and temperature stratification are eliminated.

[0025] As a preferred embodiment, the ventilation unit 3 comprises: a wind pipe 31, one end of which is connected with the pipeline 12; an outer fixed pipe 32, which is arranged in parallel along the length direction of the breeding shed 1, one end of the outer fixed pipe 32 is connected with the wind pipe 31; an exhaust elbow pipe 33, which is arranged in parallel on the outer fixed pipe 32 and is staggered, each exhaust elbow pipe 33 can exhaust the fresh air in the outer fixed pipe 32 to the breeding area of the breeding shed 1; and a clean air device 4, which is fixed between the wind pipe 31 and the outer fixed pipe 32, the clean air device 4 can quickly purify the fresh air to prevent mosquitoes from entering the breeding shed 1 with the fresh air.

[0026] In this embodiment, the exhaust elbow 33 is provided with auxiliary fan blade 34, auxiliary fan blade 34 can be frequency adjustment according to the beef cattle breeding situation in breeding area, so as to ensure that the specified flow of fresh air in the breeding area, and the exhaust elbow 33 is arranged with a plurality of inner ring, each of the inner ring is coaxially fixed with ring pipe 35, the ring pipe 35 is connected with water mist pipe, and the ring pipe 35 is circularly distributed with a plurality of spray heads 36, the plurality of spray heads 36 on the ring pipe 35 can provide low temperature water mist for the circulating fresh air in the work, so as to significantly improve the ability of fresh air carrying water vapor, the evaporation efficiency is very high, can instantly absorb a large amount of heat in the breeding shed 1; The end of the exhaust elbow 33 is rotatably provided with a grille 37, a plurality of inclined fan blades are arranged in the grille 37, and the inclination angle of the fan blades can be adjusted. A control motor 38 is installed outside the exhaust elbow 33. The output end of the control motor 38 is connected to the grille 37 through gear meshing to drive the grille 37, so as to effectively adjust the direction of the fresh air exhaust.

[0027] In this embodiment, the fresh air device 4 comprises: a pipe body 41, a cylinder pipe 42 is fixed inside the center, fresh air can pass through the cylinder pipe 42 quickly; The rotary blade 43 is horizontally installed in the cylinder pipe 42, the shape of the rotary blade 43 is spiral structure, the fresh air can form high speed vortex when flowing along the rotary blade 43, the centrifugal force is large, in the vortex formed by the fresh air, the impurities with large mass (such as mosquitoes, dust, particulate matter) are thrown to the inner wall of the pipe body 41 from the center of the airflow when the airflow rotates, compared with the traditional insect screen, the spiral channel formed by the rotary blade 43 has smaller resistance to airflow, which can ensure larger fresh air supply and realize continuous high flux ventilation effect; The connecting pipe 44 is fixed in the pipe body 41 and communicates with the cylinder pipe 42, the other end of the connecting pipe 44 is connected with the outer fixed pipe 32; The support ring 5 is slidably assembled in the cylinder pipe 42, the support ring 5 is symmetrically arranged, two support rings 5 are respectively connected to the two ends of the rotary blade 43, a plurality of support rods 51 are fixed on the support ring 5, and each support rod 51 is slidably connected to the cylinder pipe 42; The slide rail frame 45 is symmetrically fixed on the inner wall of the cylinder pipe 42, the slide rail frame 45 is slidably connected with the slide block 46, and each slide block 46 is connected with the support ring 5, so that the two support rings 5 can be synchronously displaced by the slide block 46.

[0028] In this embodiment, the sliding rail frame 45 is rotatably connected with a lead screw (not shown in the figure), and the sliding block 46 is screw-connected with the lead screw for transmission; the rotating blade 43 is made of a fiber composite material capable of elastic deformation, and has a strong elastic deformation effect, so that when the two supporting rings 5 slide towards each other for adjustment, the rotating blade 43 can be gradually compressed, at this time the pitch of the rotating blade 43 becomes smaller, and the tangential velocity component of the new air flowing along the rotating blade 43 is enhanced, forming stronger vortex flow in the pipeline 12, enhancing the mosquito prevention effect, and avoiding mosquitoes entering the breeding shed 1 along with the new air; in particular, in seasons or periods with fewer mosquitoes, the rotating blade 43 can be adjusted to an expanded state (large pitch), at this time the wind resistance is small and the ventilation volume is large, realizing energy-saving and efficient basic ventilation; while in the mosquito-intensive period of dusk, summer, or when the external air quality is poor (such as willow catkins, dust), the rotating blade 43 is compressed (small pitch), stronger vortex flow is formed, the powerful mode is started, and the highest level of protection is provided, so as to realize the maximum protection effect under the premise of ensuring a certain ventilation volume, or realize the maximum ventilation efficiency under the premise of meeting the protection requirements. Compared with the traditional filter screen, the device can maintain stable low wind resistance and high ventilation volume for a long time, and will not have problems such as the mesh being blocked by dust and mosquitoes, resulting in a sharp decrease in ventilation efficiency, etc., and is suitable for poultry and livestock breeding in breeding sheds.

[0029] As a preferred embodiment, a through hole 47 is formed in the inner wall of the barrel 42 between the two supporting rings 5, and the barrel 42 and the pipe body 41 are sealingly connected to form an annular guide cavity, and the through hole 47 is connected to the annular guide cavity; a plurality of inner holes 48 are formed in the circumference of the connecting pipe 44, and the new air entering the annular guide cavity can enter the connecting pipe 44 through the inner holes 48, and a plurality of arc-shaped adhesive plates (not shown in the figure) are arranged in the annular guide cavity; in this way, when the pitch of the rotating blade 43 is adjusted to be small, the new air forms strong vortex flow, and the mosquitoes in the new air can enter the annular guide cavity through the through hole 47, so as to be effectively captured by the adhesive plates, the surface of the adhesive plates is covered with high-viscosity, aging-resistant mosquito adhesive, and the adhesive plates can be designed as sliding rail type or magnetic type cards, which can be easily inserted and taken out from the maintenance opening on the side of the pipe body 41, and in addition, the adhesive plates can be replaced by high-voltage electrostatic dust collection plates, so that the mosquitoes hitting on the plates are instantaneously electrified by the high-voltage electric field, and are firmly adsorbed on the plates, and the dead mosquitoes are shaken off to the dust collection box below by periodically turning off the power and mechanically shaking.

[0030] The center ring 49 is connected to the middle of the rotary blade 43 and can be adjusted in sliding by the micro electric telescopic device on the cylinder tube 42, so as to effectively change the distance between the center ring 49 and the front and rear support rings 5, so that the rotary blade 43 is divided into two sections, for example, the front section is large pitch, the rear section is small pitch, the front section is small pitch, the rear section is large pitch, the front and rear sections are the same pitch, so that the structure is further adjusted in different compression degrees of the rotary blade 43, for example, when the front section of the rotary blade 43 is adjusted to be large pitch, the air flow resistance is small, mainly responsible for efficiently guiding and accelerating the intake of fresh air, maintaining high flow rate, and when the pitch of the rotary blade 43 in the flow of fresh air is small, the fresh air forms a strong vortex, so as to realize the effect of strong vortex compression after large flow rate intake; when the front section of the rotary blade 43 is adjusted to be small pitch, a strong vortex and centrifugal separation can be immediately formed on the entering fresh air, at this time, the air resistance is large, most of the pollutants are captured by the adhesion plate at the inlet, and the large pitch of the subsequent rotary blade 43 allows the airflow after preliminary purification to flow out smoothly, reduces the flow resistance, and restores the wind pressure.

[0031] In the embodiment, the guide ring 52 is fixed to one end of the cylinder tube 42 close to the outer fixed tube 32, a plurality of leaf plates 53 are circumferentially distributed on the guide ring 52, one end of each of the leaf plates 53 is hinged to the guide ring 52, a transmission rod 54 is hinged in each of the leaf plates 53, a connecting rod 55 is coaxially fixed on the support ring 5, the other end of each of the transmission rods 54 is connected to the connecting rod 55, wherein, as the support rings 5 slide towards each other, the rotary blade 43 is compressed, at this time, each of the leaf plates 53 can be pulled to shrink by the transmission rod 54, so that the effective ventilation area is small, so that most of the fresh air enters the annular guide cavity through the through hole 47, the fresh air flows along the annular guide cavity in the axial direction and enters the connecting tube 44 from the inner hole 48, and very little fresh air forms a vortex along the rotary blade 43 and then directly enters the connecting tube 44 through the guide ring 52, so as to fully utilize the adhesion plate to capture mosquitoes; when the support rings 5 are adjusted in reverse sliding, the leaf plates 53 can be pulled to expand by the transmission rod 54, the effective ventilation area is large, the fresh air almost completely enters the connecting tube 44 through the guide ring 52, the air resistance is small, the ventilation volume is large, and it is suitable for use in time periods with less mosquitoes.

[0032] In the embodiment, the rotary blade 43 is internally provided with a hollow structure, and the hollow structure is filled with adsorbing cotton, the adsorbing cotton is soaked with an insect repellent; the surface of the rotary blade 43 is distributed with capillary micropores, the insect repellent of the adsorbing cotton is evaporated through the capillary micropores, and a liquid delivery pipe is embedded in the rotary blade 43 and connected to the liquid delivery pipe, the liquid delivery pipe is mainly used for providing the insect repellent liquid to the adsorbing cotton, so as to ensure the stability of the drug source, the capillary micropores almost do not produce liquid dripping or ineffective evaporation, greatly improve the utilization rate of the drug, and reduce the operation cost.

[0033] In the embodiment, the middle part of each support ring 5 is slidably connected with an axle pressing block 6, a plurality of support springs are connected between the axle pressing block 6 and the support ring 5, a piezoelectric vibrator 61 is fixed in the support ring 5, and the output end of the piezoelectric vibrator 61 is connected with the axle pressing block 6. The piezoelectric vibrator 61 can realize the axial vibration of the rotating blade 43 in working, the axial vibration of the rotating blade 43 can periodically disturb the fresh air passing through the rotating blade 43, additional micro-turbulence is generated, and the volatilized insect repellent can be more quickly and uniformly mixed with the fresh air.

[0034] The above merely describes the preferred embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacements or changes according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A ventilation and heat dissipation shed for raising beef cattle to prevent mosquitoes and other insects, characterized in that, include: The breeding shed (1) is surrounded by protective railings; Roller blinds (2) are distributed around the top of the breeding shed (1), and each roller blind (2) is fitted with an insect-proof net (21). Wheel frames (22) are symmetrically distributed at both ends of each of the roller blind frames (2), and the plurality of wheel frames (22) are vertically distributed; Ventilation unit (3) is centrally mounted on the top of the breeding shed (1); A fan (11) is installed outside the breeding shed (1). The exhaust port of the fan (11) is connected to a pipe (12), and the other end of the pipe (12) is connected to the ventilation unit (3). A filter screen is installed at the air inlet of the fan (11); The breeding shed (1) is equipped with an exhaust fan, and the air inlet of the exhaust fan is located at the four corners of the breeding shed. The ventilation unit (3) includes: Air duct (31); An external fixing pipe (32) is set parallel to the length of the breeding shed (1), and one end of the external fixing pipe (32) is connected to the air duct (31); The exhaust bend (33) is arranged on the external fixed pipe (32) in a staggered manner; The air purification device (4) is fixed between the air duct (31) and the external fixed pipe (32); An auxiliary fan blade (34) is provided inside the exhaust bend (33), and multiple inner rings are arranged inside the exhaust bend (33). A ring pipe (35) is coaxially fixed on each inner ring. A water mist pipe is connected to the outside of the ring pipe (35), and multiple spray heads (36) are distributed circumferentially on the ring pipe (35). The exhaust bend (33) is rotatably fitted with a grille (37), and multiple inclined fan blades are arranged inside the grille (37). A control motor (38) is installed outside the exhaust bend (33), and the output end of the control motor (38) is connected to the grille (37) for transmission through gear meshing. The air purification device (4) includes: The tube body (41) has a cylindrical tube (42) fixed at its center; The blade (43) is horizontally installed in the tube (42) and its shape is a spiral structure; A connecting pipe (44) is fixed inside the pipe body (41) and connected to the cylindrical tube (42). The other end of the connecting pipe (44) is connected to the outer fixed pipe (32). Support ring (5) is slidably assembled inside the tube (42). There are two support rings (5) symmetrically arranged. The two support rings (5) are respectively connected to the two ends of the blade (43). Multiple support rods (51) are fixed on the circumference of the support ring (5). Each support rod (51) is slidably connected to the tube (42). The slide rail frame (45) is symmetrically fixed on the inner wall of the tube (42). The slide rail frame (45) is slidably connected with sliders (46), and each slider (46) is connected to the support ring (5). Each slide rail frame (45) is rotatably connected to a lead screw, and the slider (46) is helically connected to the lead screw for transmission. The blade (43) is made of a fiber composite material that can be elastically deformed.

2. The mosquito-proof, ventilated, and heat-dissipating shed for beef cattle breeding according to claim 1, characterized in that, A through hole (47) is provided on the inner wall of the tube (42) between the two support rings (5). The tube (42) and the tube body (41) are sealed to form an annular guide cavity. The through hole (47) is connected to the annular guide cavity. The connecting pipe (44) has multiple inner holes (48) around its circumference, and multiple arc-shaped adhesive plates are arranged inside the annular guide cavity; A central ring (49) is also slidably disposed inside the tube (42), and the central ring (49) is connected to the middle part of the blade (43).

3. The mosquito-proof, ventilated, and heat-dissipating shed for beef cattle breeding according to claim 1, characterized in that, A guide ring (52) is fixed at one end of the inner tube (42) near the outer fixed tube (32). Multiple blades (53) are distributed circumferentially on the guide ring (52), and one end of each blade (53) is hinged to the guide ring (52). Each blade (53) is hinged with a transmission rod (54), and a connecting rod (55) is coaxially fixed on the support ring (5). The other end of each transmission rod (54) is connected to the connecting rod (55).

4. The mosquito-proof, ventilated, and heat-dissipating shed for beef cattle breeding according to claim 1, characterized in that, The inside of the spiral blade (43) is a cavity structure, and the cavity is filled with absorbent cotton, which is soaked with an insect repellent. The surface of the spiral blade (43) is distributed with capillary micropores, through which the insect repellent of the absorbent cotton evaporates, and an infusion tube is embedded in the spiral blade (43).

5. A mosquito-proof, ventilated, and heat-dissipating shed for beef cattle breeding according to claim 1, characterized in that, A shaft pressure block (6) is slidably connected to the middle of each of the support rings (5). Multiple support springs are connected between the shaft pressure block (6) and the support ring (5). A piezoelectric vibrator (61) is fixed inside the support ring (5). The output end of the piezoelectric vibrator (61) is connected to the shaft pressure block (6).

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