CN213016856U

CN213016856U - Pneumatic turbine type air-jet mud-stirring device

Info

Publication number: CN213016856U
Application number: CN202020926361.XU
Authority: CN
Inventors: 王梓宇; 王鹏; 邹欢; 邓永锋; 王翔; 李璘琳; 江海明; 陈晓剑; 徐进
Original assignee: China Railway Major Bridge Engineering Group Co Ltd MBEC; China Railway Bridge Science Research Institute Ltd; 5th Engineering Co Ltd of MBEC
Current assignee: China Railway Major Bridge Engineering Group Co Ltd MBEC; China Railway Bridge Science Research Institute Ltd; 5th Engineering Co Ltd of MBEC
Priority date: 2020-05-27
Filing date: 2020-05-27
Publication date: 2021-04-20
Anticipated expiration: 2030-05-27

Abstract

The utility model relates to a pile drilling construction technical field, concretely relates to pneumatic turbine type penetrates wind and stirs mud device, include: the gas distribution cabin comprises a main gas inlet, a bypass power gas outlet and a central main gas outlet which are communicated with each other; the rotor is provided with a rotor air inlet which is rotationally connected with the central main air outlet at one end, air outlet holes which are arranged at intervals are arranged on the side wall of the other end, and blades are arranged at intervals in the circumferential direction of the middle part of the rotor; the stator is sleeved in the middle of the rotor, the blades are located in an accommodating space formed by the stator and the rotor, the accommodating space is provided with a driving gas outlet and a driving gas inlet communicated with the bypass power gas outlet, and high-pressure gas is introduced into the bypass power gas outlet to push the blades to enable the rotor to rotate relative to the stator and enable the gas to be discharged from the driving gas outlet. Can effectively solve among the prior art device that silt was arranged in gas lift reverse circulation in use can lead to forming the concave surface of a bowl mouth shape around the exhaust hole, and silt discharge efficiency reduces, influences the problem of efficiency of construction.

Description

Pneumatic turbine type air-jet mud-stirring device

Technical Field

The utility model relates to a pile drilling construction technical field, concretely relates to pneumatic turbine type penetrates wind and stirs mud device.

Background

In the bridge foundation construction process, sludge in the piling process needs to be discharged above a horizontal plane in a gas lift reverse circulation mode.

The working principle of the gas lift reverse circulation drilling is similar to that of the gas lift water pumping of an air compressor, namely, compressed air passes through a double-wall air water faucet and is sprayed into an inner pipe from a mixer through an annular gap between the inner pipe and an outer pipe of a double-wall driving drill pipe and the double-wall drill pipe to form countless small bubble channels, bubbles rise rapidly along the inner pipe while expanding simultaneously, and the pressure is reduced, so that the gas lift effect is generated.

However, in the existing gas lift reverse circulation sludge discharge device, only one round fixed exhaust hole is arranged under water, so that a bowl-shaped concave surface is formed around the exhaust hole after sludge is discharged in a short time, sludge discharge efficiency is reduced, more sludge with higher efficiency is discharged by moving the exhaust pipe, and construction efficiency is affected.

SUMMERY OF THE UTILITY MODEL

To the defect that exists among the prior art, the utility model aims to provide a pneumatic turbine type penetrates wind and stirs mud device can effectively solve among the prior art device in use that gas lift reverse circulation row silt can lead to the concave surface that can form a bowl mouth shape around the exhaust hole, and silt discharge efficiency reduces, influences the problem of efficiency of construction.

In order to achieve the above purpose, the utility model adopts the technical proposal that:

the utility model provides a pneumatic turbine type penetrates wind and stirs mud device, include:

the gas distribution cabin comprises a main gas inlet, a bypass power gas outlet and a central main gas outlet which are communicated with each other;

a rotor, one end of which is provided with a rotor air inlet rotationally connected with the central main air outlet, the side wall of the other end of which is provided with air outlet holes arranged at intervals, and blades are arranged at intervals in the circumferential direction of the middle part of the rotor;

the stator is sleeved in the middle of the rotor, the blades are located in an accommodating space formed by the stator and the rotor, the accommodating space is provided with a driving gas outlet and a driving gas inlet communicated with the bypass power gas outlet, and the bypass power gas outlet is communicated with high-pressure gas to push the blades to enable the rotor to rotate relative to the stator and enable the gas to be discharged from the driving gas outlet.

On the basis of the technical scheme, the rotor is provided with accommodating grooves at intervals in the circumferential direction in the middle, the blades are arranged in the accommodating grooves, the accommodating grooves are also internally provided with telescopic elastic bodies, one ends of the blades are abutted against the telescopic elastic bodies, the other ends of the blades are abutted against the inner wall of the stator, the rotor is eccentrically arranged relative to the stator, every two blades and the stator and the rotor form a gas space, and the driving gas inlet and the driving gas outlet are respectively communicated with different gas spaces so that the rotor can be driven to rotate when the driving gas inlet flows in high-pressure gas.

On the basis of the technical scheme, the central main air outlet is provided with a ventilation grid, and the ventilation grid is provided with a gas circulation detection device extending into the rotor and used for detecting the gas circulation inside the rotor.

On the basis of the above technical solution, the gas circulation detection device includes:

a spring, one end of which is arranged on the ventilation grid;

a scroll shaft having one end connected to the spring;

the turbine fan blade is sleeved on the turbofan shaft, rotates relative to the turbofan shaft when air flow is introduced into the rotor, and generates axial force on the turbofan shaft;

and the force measuring sensor is arranged at the joint of the scroll shaft and the ventilation grid and used for detecting the stress of the spring and transmitting the stress to ground equipment.

On the basis of the technical scheme, the end part of the other end of the turbofan shaft is provided with a cleaning brush for cleaning the air holes.

On the basis of the above technical solution, the cleaning brush includes:

the brush holders with a set number are circumferentially arranged at intervals and are connected with the end part of the other end of the turbofan shaft;

the brush heads are arranged on the outer sides of the brush frames respectively, and the diameter of the circumference where the brush heads are located is larger than the inner diameter of the rotor;

when the air flow in the rotor is normally circulated through the air outlet hole, the axial force provided by the turbine fan blades enables the brush head to be positioned between the air outlet hole and the end part of the rotor;

when the normal circulation of the air flow in the rotor is blocked through the air outlet, the axial force provided by the turbine fan blade enables the brush head to be positioned at the air outlet.

On the basis of the technical scheme, a brush groove for accommodating the brush head is formed in the inner wall of the rotor between the air outlet hole and the end part of the rotor.

On the basis of the technical scheme, still be equipped with safe transom window on the lateral wall of rotor, the inboard that goes out the transom window safely is equipped with the spout, the outside cover of the whirlpool fan axle other end be equipped with but the whirlpool fan axle pivoted structure of windowing relatively, the structure of windowing includes:

the window opening frames are arranged at intervals in the circumferential direction, and one ends of the window opening frames rotate relatively and are connected with the turbofan shaft;

the sealing plates are arranged on the outer sides of the window frames respectively and clamped in the sliding grooves;

when the air flow in the rotor normally circulates through the air outlet hole, the axial force provided by the turbine fan blades enables the sealing plate to be positioned at the window opening frame;

when the normal circulation of the air flow in the rotor is blocked through the air outlet hole, the sealing plate slides along the sliding groove to open the safe air outlet window by the axial force provided by the turbine fan blades.

On the basis of the technical scheme, the end part of the rotor is also provided with air outlet holes at intervals.

On the basis of the technical scheme, the blade is a bakelite blade.

Compared with the prior art, the utility model has the advantages of: and the gas flowing out of the bypass power gas outlet is injected into the accommodating space through the driving gas inlet, so that the rotor rotates relative to the stator. The gas flowing out of the central main gas outlet of the gas distribution cabin enters the rotor and is sprayed out through gas outlet holes arranged on the side wall of the other end at intervals, and when the rotor rotates, the gas outlet holes also rotate. The air outlet rotates to avoid forming a bowl-mouth-shaped concave surface around, so that the discharge efficiency can be improved, more sludge discharge with higher efficiency can be realized without moving the position of the exhaust pipe, and the construction efficiency is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural view of a pneumatic turbine type air-jet mud-stirring device in an embodiment of the present invention;

FIG. 2 is an axial sectional view of the pneumatic turbine type air-jet mud-stirring device in the embodiment of the present invention;

fig. 3 is a schematic structural view of a rotor according to an embodiment of the present invention;

FIG. 4 is a diagram illustrating the cleaning brush and the window opening structure when the circulation is blocked according to an embodiment of the present invention;

FIG. 5 is a diagram illustrating the cleaning brush and the window structure during normal circulation according to an embodiment of the present invention;

fig. 6 is a schematic connection diagram of the gas circulation detecting device, the cleaning brush and the windowing structure in the embodiment of the present invention.

In the figure: 1. a gas distribution chamber; 11. a total air inlet; 12. a bypass power outlet; 13. a central main air outlet; 14. a ventilation grid; 15. a bypass air outlet regulating valve; 16. a central air outlet regulating valve;

2. a rotor; 21. a rotor air inlet; 22. an air outlet; 23. a blade; 24. accommodating grooves; 25. a stretchable elastic body; 26. brushing a groove; 27. a safety vent window; 28. a chute;

3. a stator; 31. a drive air outlet; 32. a drive air inlet; 33. a gas space;

4. a gas flow detection device; 41. a spring; 42. a scroll shaft; 43. turbine blades;

5. a cleaning brush; 51. a brush holder; 52. a brush head;

6. a windowing structure; 61. opening a window frame; 62. and (7) sealing the plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of a pneumatic turbine type air-jet mud-stirring device in an embodiment of the present invention; FIG. 2 is an axial sectional view of the pneumatic turbine type air-jet mud-stirring device in the embodiment of the present invention; fig. 3 is a schematic structural view of a rotor according to an embodiment of the present invention; as shown in fig. 1-3, the utility model provides a pneumatic turbine type penetrates wind and stirs mud device, include: the gas distribution cabin 1 comprises a main gas inlet 11, a bypass power gas outlet 12 and a central main gas outlet 13 which are communicated with each other; the air conditioner also comprises a rotor 2, wherein one end of the rotor 2 is provided with a rotor air inlet 21 which is rotationally connected with the central main air outlet 13, the side wall of the other end of the rotor 2 is provided with air outlet holes 22 which are arranged at intervals, and blades 23 are arranged at intervals in the circumferential direction in the middle of the rotor 2; the stator 3 is sleeved in the middle of the rotor 2, the blades 23 are located in an accommodating space formed by the stator 3 and the rotor 2, the accommodating space is provided with a driving air outlet 31 and a driving air inlet 32 communicated with the bypass power air outlet 12, and high-pressure air is introduced into the bypass power air outlet 12 to push the blades 23 to enable the rotor 2 to rotate relative to the stator 3 and enable the air to be discharged from the driving air outlet 31.

When this air turbine type air-jet mud-stirring device is used, the rotor 2 is rotated relative to the stator 3 by injecting gas into the main gas inlet 11 of the sub-chamber 1 and injecting gas flowing out from the bypass power gas outlet 12 into the housing space through the drive gas inlet 32. The gas flowing out from the central main gas outlet 13 of the gas distribution cabin 1 enters the rotor 2 and is sprayed out through the gas outlet holes 22 arranged at intervals on the side wall of the other end, and when the rotor 2 rotates, the gas outlet holes 22 also rotate. The rotation of the air outlet 22 can avoid forming a bowl-mouth-shaped concave surface around, can improve the discharge efficiency and reduce, can realize more sludge discharge with higher efficiency without moving the position of the exhaust pipe, and improves the construction efficiency.

In the present embodiment, bypass motive air outlet 12 and center main air outlet 13 are provided with bypass outlet regulating valve 15 and center outlet regulating valve 16, respectively, to regulate the amount of ventilation of bypass motive air outlet 12 and center main air outlet 13, respectively.

Preferably, the rotor 2 is provided with accommodating grooves 24 at intervals in the circumferential direction of the middle portion of the rotor 2, the blades 23 are arranged in the accommodating grooves 24, the accommodating grooves 24 are further provided with telescopic elastic bodies 25, one ends of the blades 23 abut against the telescopic elastic bodies 25, the other ends of the blades abut against the inner wall of the stator 3, the rotor 2 is eccentrically arranged relative to the stator 3, every two blades 23, the stator 3 and the rotor 2 form a gas space 33, and the driving gas inlet 32 and the driving gas outlet 31 are communicated with different gas spaces 33, so that when the driving gas inlet 32 flows in high-pressure gas, the rotor 2 can be driven to rotate.

In the present embodiment, the stator 3 and the rotor 2 are eccentrically disposed, the two blades 23 of the gas space 33 communicated with the driving gas inlet 32 have different areas, and the gas space 33 communicated with the driving gas inlet 32 has different pressures due to the two blades 23 flowing into the high-pressure gas through the driving gas inlet 32, so as to form a moment for rotating the rotor 2. Preferably, each vane 23 forming the gas space 33 is contracted to a minimum area during the entire operation of the vane 23. So that the rotor 2 can be driven to rotate when the high pressure gas flows into the driving inlet 32.

Preferably, the central main outlet 13 is provided with a ventilation grille 14, the ventilation grille 14 being provided with a gas circulation detection device 4 projecting into the rotor 2 for detecting the gas circulation inside the rotor 2.

In the present embodiment, the gas flow-through detecting device 4 can detect the gas flow-through inside the rotor 2 and, at that time, find whether the gas outlet hole 22 is clogged.

Fig. 6 is a schematic connection diagram of the gas circulation detection device, the cleaning brush and the windowing structure in the embodiment of the present invention, as shown in fig. 6, preferably, the gas circulation detection device 4 includes: a spring 41 having one end provided on the ventilation grill 14; a scroll shaft 42 having one end connected to the spring 41; the turbine fan blade 43 is sleeved on the turbofan shaft 42, rotates relative to the turbofan shaft 42 when ventilating flow in the rotor 2, and generates axial force on the turbofan shaft 42; and the force sensor is arranged at the joint of the scroll shaft 42 and the ventilation grid 14 and used for detecting the stress of the spring 41 and transmitting the stress to ground equipment.

In this embodiment, the turbofan shaft 42 is connected to the load cell by the spring 41, and when the ventilation volume is large, the force applied to the turbine blade 43 is large. When the ventilation amount is small, the force applied to the turbine blade 43 is small. Thereby detecting the gas flow rate inside the rotor 2 and finding whether the gas outlet hole 22 is blocked.

In addition, in this embodiment, a guide hole is formed at one end of the scroll shaft 42 connected to the spring 41, a guide rod extending into the guide hole is formed on the ventilation grid 14, the spring 41 is sleeved on the guide rod, and the guide rod can ensure the stability of the whole gas flow detection device 4.

FIG. 4 is a diagram illustrating the cleaning brush and the window opening structure when the circulation is blocked according to an embodiment of the present invention; FIG. 5 is a diagram illustrating the cleaning brush and the window structure during normal circulation according to an embodiment of the present invention; as shown in fig. 5 and 6, it is preferable that the end of the other end of the scroll shaft 42 is provided with a cleaning brush 5 for cleaning the air holes.

In this embodiment, the cleaning brush 5 can remove the blocked impurities in time when the air outlet 22 is blocked, so as to ensure the smoothness of the air outlet 22.

Preferably, the cleaning brush 5 includes: a set number of brush holders 51 circumferentially spaced and connected to the other end of the scroll shaft 42; the brush heads 52 with the same number as the brush holders 51 are respectively arranged at the outer sides of the brush holders 51, and the diameter of the circumference where the brush heads 52 are located is larger than the inner diameter of the rotor 2; and when the air flow in the rotor 2 is normally circulated through the air outlet hole 22, the axial force provided by the turbine fan blades 43 makes the brush head 52 positioned between the air outlet hole 22 and the end part of the rotor 2; the axial force provided by the turbine blades 43 causes the brush head 52 to be positioned at the outlet aperture 22 when normal flow of air within the rotor 2 through the outlet aperture 22 is impeded.

In this embodiment, when the air flow in the rotor 2 normally circulates through the air outlet 22, the ventilation amount is large, and the force applied to the turbine blade 43 is large, so that the axial force provided by the turbine blade 43 makes the brush head 52 located between the air outlet 22 and the end of the rotor 2. When the normal flow of the air in the rotor 2 through the air outlet hole 22 is blocked, the force applied to the turbine blade 43 is small, and the axial force provided by the turbine blade 43 cannot make the brush head 52 located between the air outlet hole 22 and the end of the rotor 2 even if the brush head 52 is located at the air outlet hole 22. At this time, the rotor 2 rotates, and the cleaning brush 5 is connected to the turbofan shaft 42, so that the rotor 2 and the brush head 52 can rotate relatively to clean the air outlet 22.

Preferably, the inner wall of the rotor 2 between the air outlet hole 22 and the end of the rotor 2 is provided with a brush groove 26 for receiving the brush head 52.

In the embodiment, the brush groove 26 for accommodating the brush head 52 is arranged on the inner wall of the rotor 2 between the air outlet 22 and the end part of the rotor 2, so that the abrasion to the brush head can be reduced when the air outlet 22 is normally exhausted.

Preferably, a safety vent 27 is further disposed on the side wall of the rotor 2, a sliding groove 28 is disposed on the inner side of the safety vent 27, a window opening structure 6 which can rotate relative to the scroll shaft 42 is sleeved on the outer side of the other end of the scroll shaft 42, and the window opening structure 6 includes: a set number of window frames 61 which are circumferentially spaced and one end of which is relatively rotatably connected to the scroll shaft 42; the sealing plates 62 are arranged on the outer sides of the window frames 61 and clamped in the sliding grooves 28; and when the air flow in the rotor 2 is normally circulated through the air outlet hole 22, the axial force provided by the turbine blades 43 makes the sealing plate 62 located at the window frame 61; when the normal flow of the air in the rotor 2 through the air outlet hole 22 is blocked, the axial force provided by the turbine blades 43 causes the sealing plate 62 to slide along the sliding groove 28 to open the safety air outlet window 27.

In the present embodiment, when the air flow in the rotor 2 normally flows through the air outlet 22, the ventilation amount is large, the force applied to the turbine blade 43 is large, and the axial force provided by the turbine blade 43 can make the sealing plate 62 be located at the window frame 61. When the normal flow of the air flow in the rotor 2 through the air outlet hole 22 is blocked, the force applied to the turbine blades 43 is small, and the axial force provided by the turbine blades 43 cannot make the sealing plate 62 be positioned at the window opening frame 61, even if the sealing plate 62 slides along the sliding groove 28 to open the safety air outlet window 27. One end of the window opening frame 61 is sleeved on the scroll shaft 42 through a bearing and can be connected with the scroll shaft 42 in a relatively rotating manner; the sealing plate 62 is engaged in the sliding groove 28, and when the rotor 2 rotates, the window opening frame 61 is connected to the scroll shaft 42 to rotate relatively, so that the entire window opening structure 6 rotates together with the rotor 2.

Preferably, the end of the rotor 2 is also provided with air outlet holes 22 at intervals. In this embodiment, the end of the rotor 2 is provided with the air outlet 22 at intervals, so that the risk of blockage can be reduced, and a better air exhaust effect can be obtained.

Preferably, the blade 23 is a bakelite blade. The bakelite blade has good wear resistance and can prolong the service life of equipment.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a mud device is stirred in pneumatic turbine type penetrating wind which characterized in that includes:

the gas distribution cabin (1) comprises a main gas inlet (11), a bypass power gas outlet (12) and a central main gas outlet (13) which are communicated with each other;

a rotor (2), one end of which is provided with a rotor air inlet (21) rotationally connected with the central main air outlet (13), the side wall of the other end of which is provided with air outlet holes (22) arranged at intervals, and blades (23) are arranged at intervals in the circumferential direction in the middle of the rotor (2);

stator (3), its cover is established the middle part of rotor (2), blade (23) are located in the accommodation space that stator (3) and rotor (2) formed, accommodation space be equipped with drive gas outlet (31) and with drive air inlet (32) of bypass power gas outlet (12) intercommunication, bypass power gas outlet (12) let in high-pressure gas and can promote blade (23) make rotor (2) rotate for stator (3), and make gaseous follow drive gas outlet (31) are discharged.

2. A pneumatic turbine type air-jet mud-stirring device as claimed in claim 1, wherein: the rotor structure is characterized in that accommodating grooves (24) are formed in the middle of the rotor (2) at intervals in the circumferential direction, the blades (23) are arranged in the accommodating grooves (24), telescopic elastic bodies (25) are further arranged in the accommodating grooves (24), one ends of the blades (23) abut against the telescopic elastic bodies (25), the other ends of the blades abut against the inner wall of the stator (3), the rotor (2) is eccentrically arranged relative to the stator (3), every two blades (23) and the stator (3) and the rotor (2) form a gas space (33), and the driving gas inlet (32) and the driving gas outlet (31) are respectively communicated with different gas spaces (33) so that the rotor (2) can be driven to rotate when the driving gas inlet (32) flows into high-pressure gas.

3. A pneumatic turbine type air-jet mud-stirring device as claimed in claim 1, wherein: the central main air outlet (13) is provided with a ventilation grid (14), the ventilation grid (14) is provided with a gas circulation detection device (4) extending into the rotor (2) and used for detecting the gas circulation inside the rotor (2).

4. A pneumatic turbine type air-jet muddler according to claim 3, wherein the gas circulation detection device (4) comprises:

a spring (41) having one end provided on the ventilation grill (14);

a scroll shaft (42) having one end connected to the spring (41);

a turbine blade (43) which is fitted around the fan shaft (42), rotates relative to the fan shaft (42) when the rotor (2) is ventilated, and generates an axial force on the fan shaft (42);

and the force measuring sensor is arranged at the joint of the turbofan shaft (42) and the ventilation grid (14) and is used for detecting the stress of the spring (41) and transmitting the stress to ground equipment.

5. The pneumatic turbine type air-jet mud stirring device as claimed in claim 4, wherein: and a cleaning brush (5) for cleaning the air hole is arranged at the end part of the other end of the scroll shaft (42).

6. A pneumatic turbine type air-jet mud-stirring device as claimed in claim 5, wherein: the cleaning brush (5) comprises:

a set number of brush holders (51) which are circumferentially arranged at intervals and connected with the end part of the other end of the scroll shaft (42);

the brush heads (52) are arranged on the outer side of the brush frame (51), the number of the brush heads (52) is the same as that of the brush frame (51), and the diameter of the circumference where the brush heads (52) are located is larger than the inner diameter of the rotor (2);

and the axial force provided by the turbine blades (43) causes the brush head (52) to be positioned between the air outlet hole (22) and the end of the rotor (2) when the air flow in the rotor (2) is normally circulated through the air outlet hole (22);

when the normal circulation of the air flow in the rotor (2) through the air outlet hole (22) is blocked, the axial force provided by the turbine fan blade (43) enables the brush head (52) to be positioned at the air outlet hole (22).

7. A pneumatic turbine type air-jet mud-stirring device as claimed in claim 6, wherein: and a brush groove (26) for accommodating the brush head (52) is formed in the inner wall of the rotor (2) between the air outlet (22) and the end part of the rotor (2).

8. The air turbine type air-jet mud stirring device as claimed in claim 4, wherein a safety air outlet window (27) is further provided on the side wall of the rotor (2), a sliding groove (28) is provided on the inner side of the safety air outlet window (27), a window opening structure (6) which can rotate relative to the fan shaft (42) is sleeved on the outer side of the other end of the fan shaft (42), and the window opening structure (6) comprises:

a set number of window frames (61) which are arranged at intervals in the circumferential direction and one end of which is connected with the scroll shaft (42) in a relatively rotating way;

sealing plates (62) which are the same as the window opening frames (61) in number and are respectively arranged on the outer sides of the window opening frames (61) and clamped in the sliding grooves (28);

and the axial force provided by the turbine blades (43) makes the sealing plate (62) located at the windowing frame (61) when the air flow in the rotor (2) is normally circulated through the air outlet hole (22);

when the normal circulation of the air flow in the rotor (2) through the air outlet hole (22) is blocked, the axial force provided by the turbine fan blades (43) enables the sealing plate (62) to slide along the sliding groove (28) to open the safety air outlet window (27).

9. A pneumatic turbine type air-jet mud-stirring device as claimed in claim 1, wherein the end of said rotor (2) is also provided with air outlet holes (22) at intervals.

10. A pneumatic turbine type air-jet mud-stirring device as claimed in claim 1, wherein: the blade (23) is a bakelite blade.