CN211137612U

CN211137612U - Pneumatic rotary sprayer

Info

Publication number: CN211137612U
Application number: CN201921450444.XU
Authority: CN
Inventors: 孔耀祖; 遆仲森; 黄玉娟; 王福芝
Original assignee: Wuhan Zhongdi University Trenchless Research Institute Co ltd
Current assignee: Wuhan Zhongdi University Trenchless Research Institute Co ltd
Priority date: 2019-09-02
Filing date: 2019-09-02
Publication date: 2020-07-31
Anticipated expiration: 2029-09-02

Abstract

The utility model provides a pneumatic jet aerator, including casing, rotor, pay-off heart pipe and centrifugal flywheel, rotate through high-pressure gas drive rotor, and then drive centrifugal flywheel and rotate, utilize the effect of centrifugal force to throw away the thick liquids in the centrifugal flywheel. The utility model has the advantages that: the structure is simple, the number of easily damaged parts is small, the rotating speed is directly related to the fed compressed air volume, the air volume is larger, the rotating speed is higher, and the rotating speed can reach more than 15,000 rpm; in addition, the rotary sprayer is waterproof and leakage-free, the compressed air has a cooling effect and does not have the problem of burning, even if blockage occurs due to the fact, the burning problem does not exist, in addition, the discharged compressed air can effectively dilute harmful gas, and the working environment is safer.

Description

Pneumatic rotary sprayer

Technical Field

The utility model relates to a non-excavation pipeline repair equipment technical field especially relates to a pneumatic jet aerator.

Background

The urban underground pipe network is an important infrastructure of a city and is an underground lifeline for ensuring the overall normal operation of urban functions. Along with the continuous acceleration of the urbanization process in China, the quantity of the engineering for expanding and reconstructing urban underground pipelines is continuously increased. When the year is 2016, the length of urban drainage pipelines is 63 kilometers, wherein the total length of the pipelines before 2000 is more than 10 kilometers, and accidents such as 'running, overflowing, dripping and leaking' of the existing municipal pipe network are frequently caused by long-term use and long-term overhaul of a large number of pipelines, so that the municipal pipe network needs to be repaired urgently.

The trenchless pipeline repairing technology is a main means for repairing underground pipelines at present. The centrifugal spraying method is an important method in trenchless pipeline repairing technology, and is a repairing method for forming a lining in a pipeline through centrifugal spraying by using a high-speed rotating spray head and cement mortar and the like as spraying materials. At present, a high-speed rotating nozzle on the market is driven by a motor, the rotating speed of the electric nozzle can only reach 2000-3000 rpm generally, effective heat dissipation, water resistance and electric leakage prevention are difficult to achieve in a humid and biogas environment, the risk of explosion exists in the biogas environment, and the machine is easy to burn when the high-speed rotating nozzle is used for a long time or blocked.

SUMMERY OF THE UTILITY MODEL

In view of this, the embodiment of the present invention provides a pneumatic rotary sprayer.

The embodiment of the utility model provides a pneumatic rotary sprayer, which comprises a shell, a rotor, a feeding core tube and a centrifugal flywheel, wherein the shell is a hollow cylinder, an inner hole of the shell is an eccentrically arranged cylindrical airflow cavity, the upper end and the lower end of the airflow cavity are sealed, the outer wall of the shell is also provided with a positive air inlet interface and an exhaust interface which are communicated with the airflow cavity, the rotor is a hollow cylinder, the rotor is accommodated in the airflow cavity and can rotate, a crescent gas flow passage is formed between the outer wall of the rotor and the inner wall of the airflow cavity, a plurality of rotor blades are arranged around the outer wall of the rotor, the outer wall of the rotor is provided with a plurality of radially extending accommodating grooves, one side of each rotor blade is arranged in one accommodating groove and can move, the other side of each rotor blade contacts the inner wall of the airflow cavity, the lower end of the rotor, the pay-off heart pipe runs through rotor middle part and lower extreme stretch into in the centrifugal flywheel, the centrifugal flywheel include flywheel roof, flywheel bottom plate and set up in the flywheel roof with the separation wing that a plurality of intervals between the flywheel bottom plate set up, each it connects to separate wing upper end the flywheel roof, the lower extreme is connected the flywheel bottom plate, arbitrary adjacent two it is the discharge gate to separate between the wing.

Further, an upper cover plate is arranged at the upper end of the shell, a through hole is formed in the middle of the upper cover plate, a bearing installation groove is formed in the lower portion of the through hole, a sealing bearing is arranged in the bearing installation groove, a step joint is arranged at the upper end of the rotor and inserted into an inner ring of the sealing bearing, the upper cover plate seals the upper end of the airflow cavity, a lower cover plate identical to the upper cover plate is arranged at the lower end of the shell, and the lower cover plate seals the lower end of the airflow cavity.

Furthermore, a plurality of fixing bolts are arranged on the upper portion of the upper cover plate, and the upper cover plate is fixedly connected with the upper end of the shell through the fixing bolts.

Furthermore, the shell is provided with a reverse air inlet interface communicated with the airflow cavity, the reverse air inlet interface and the forward air inlet interface are respectively arranged at two sides of the narrowed gas flow passage, and the airflow inlet directions of the reverse air inlet interface and the forward air inlet interface are tangent to the outer wall of the rotor.

Furthermore, the number of the rotor blades is 5-10, and all the rotor blades are uniformly distributed around the outer wall of the rotor.

Furthermore, the center of the flywheel bottom plate is provided with a conical material distribution bulge, the vertex of the material distribution bulge is over against the lower end of the feeding core tube, and all the separation wings are uniformly arranged around the axis of the material distribution bulge.

Furthermore, the feeding core tube is a stepped pipeline with a thick upper end and a thin lower end, the lower end of the feeding core tube penetrates through the middle of the rotor and extends into the centrifugal flywheel, the stepped transition position of the feeding core tube is pressed on the upper end of the shell, and a pipeline connector is arranged at the upper end of the feeding core tube.

The embodiment of the utility model provides a beneficial effect that technical scheme brought is: the pneumatic rotary sprayer of the utility model drives the rotor to rotate through the high-pressure gas, further drives the centrifugal flywheel to rotate, utilizes the effect of centrifugal force to throw out the slurry in the centrifugal flywheel, has no problems of heating and burning compared with the existing motor-driven rotary sprayer, is applicable to the environment with combustible gas, avoids explosion, and has higher safety; the rotating speed of the centrifugal flywheel is controlled through the air flow of the high-pressure gas, the centrifugal force generated by the higher the rotating speed of the centrifugal flywheel is, the slurry can be thrown farther, and a pipeline or an inspection well with a larger diameter can be repaired.

Drawings

Fig. 1 is a schematic cross-sectional view of a pneumatic rotary sprayer according to the present invention;

FIG. 2 is a schematic cross-sectional view E-E of FIG. 1;

fig. 3 is a schematic sectional view of F-F in fig. 1.

In the figure: 1-shell, 1.1-airflow cavity, 2-upper cover plate, 2.1-sealing bearing, 2.2-exhaust interface, 2.3-exhaust cap, 3-lower cover plate, 3.1-sealing bearing, 4-feeding core tube, 4.1-pipeline interface, 5-centrifugal flywheel, 5.1-flywheel top plate, 5.2-flywheel bottom plate, 5.3-separating wing, 5.4-distributing projection, 5.5-discharge hole, 6-rotor, 6.1-rotor blade, 6.2 containing groove, 7-air inlet interface, A-positive air inlet interface and B-negative air inlet interface.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be further described below with reference to the accompanying drawings.

Referring to fig. 1, an embodiment of the present invention provides a pneumatic rotary sprayer, which includes a housing 1, a rotor 6, a feeding core tube 4 and a centrifugal flywheel 5.

The improved shell structure is characterized in that the shell 1 is a hollow cylinder, an upper cover plate 2 is arranged at the upper end of the shell 1, the upper cover plate 2 is a disc, the upper cover plate 2 covers the upper end of the shell 1, a plurality of fixing bolts are arranged on the upper portion of the upper cover plate 2, and the upper cover plate 2 is fixedly connected with the upper end of the shell 1 through the fixing bolts. The inner hole in the middle of the shell 1 is eccentrically arranged, the inner hole is an airflow cavity 1.1, the airflow cavity 1.1 is vertically arranged and is cylindrical, and the axis of the airflow cavity 1.1 is staggered with the axis of the shell 1, so that the wall thickness of the shell 1 is uneven. The upper cover plate 2 seals the upper end of the airflow chamber 1.1, and a sealing gasket may be disposed between the upper cover plate 2 and the upper end of the housing 1 to ensure the sealing effect. The lower end of the shell 1 is provided with a lower cover plate 3 which is the same as the upper cover plate 2, and the lower cover plate 3 seals the lower end of the airflow cavity 1.1.

Referring to fig. 2, the rotor 6 is a hollow cylinder, and a plurality of rotor blades 6.1 are disposed around an outer wall of the hollow cylinder, and the rotor blades 6.1 extend along a radial direction of the rotor 6. The diameter of the rotor 6 is smaller than that of the airflow cavity 1.1, the rotor 6 is contained in the airflow cavity 1.1 and can rotate, and a crescent gas flow passage is formed between the outer wall of the rotor 6 and the airflow cavity 1.1. Here, the outer wall of the rotor 6 is provided with a plurality of radially extending receiving slots 6.2, one side of each of the rotor blades 6.1 is movably disposed in one of the receiving slots 6.2, and the other side contacts the inner wall of the gas flow chamber 1.1, so that all the rotor blades 6.1 divide the gas flow path, and a gas space is formed between any two rotor blades 6.1. In this embodiment the rotor 6 upper end is the step joint, the middle part of upper cover plate 2 is equipped with the thick ladder through-hole of the thin lower extreme in upper end, the through-hole lower part is the bearing mounting groove, be equipped with sealed bearing 2.1 in the bearing mounting groove, the step joint inserts sealed bearing 2.1's inner circle. The lower cover plate 3 is the same as the upper cover plate in structure, a sealing bearing 3.1 which is the same in installation mode is further arranged on the lower cover plate, the lower end of the rotor 6 is inserted into an inner ring of the sealing bearing 3.1 and penetrates through the lower cover plate 3, the upper end of the rotor 6 can rotate and is sealed with the joint of the sealing bearing 2.1, and the lower end of the rotor 6 can rotate and is sealed with the joint of the sealing bearing 3.1. The number of the rotor blades 6.1 is 5-10, all the rotor blades 6.1 are uniformly distributed around the outer wall of the rotor 6, and the outer side of each rotor blade 6.1 is in contact with the airflow cavity 1.1. The rotor blade 6.1 can be made of wear-resistant high-strength low-hardness organic materials such as nylon and engineering plastics, and the shell 1 is not scratched when the rotor blade 6.1 rotates at a high speed.

The lower end of the rotor 6 penetrates through the lower cover plate 3 and extends out of the lower end of the shell 1, and the upper end of the centrifugal flywheel 5 is in threaded connection with the lower end of the rotor 6. The feeding core tube 4 is an integrally formed stepped pipeline with a thick upper end and a thin lower end, the lower end of the feeding core tube 4 penetrates through the middle of the rotor 6 and is in threaded connection with the upper cover plate 2, the stepped transition position of the feeding core tube 4 is tightly pressed on the upper cover plate 2, the lower end of the feeding core tube 4 extends into the middle of the rotor 6 and is arranged on the upper portion of the centrifugal flywheel 5, a pipeline interface 4.1 is arranged at the upper end of the feeding core tube 4, and the pipeline interface 4.1 is used for being connected with an external slurry conveying pipeline.

Referring to fig. 3, the centrifugal flywheel 5 includes a flywheel top plate 5.1, a flywheel bottom plate 5.2, and a plurality of separation wings 5.3 arranged between the flywheel top plate 5.1 and the flywheel bottom plate 5.2 at intervals, the upper end of the flywheel top plate 5.1 is in threaded connection with the lower end of the rotor 6, the lower end of the feeding core tube 4 extends to 3-5 mm below the flywheel top plate 5.1, and the feeding core tube 4 is not in direct contact with the centrifugal flywheel 5. The flywheel top plate 5.1 and the flywheel bottom plate 5.2 are arranged oppositely from top to bottom, the upper end of each separating wing 5.3 is vertically connected with the flywheel top plate 5.1, the lower end of each separating wing is vertically connected with the flywheel bottom plate 5.2, and a discharge port 5.5 is arranged between any two adjacent separating wings 5.3. The center of the flywheel bottom plate 5.2 is provided with a conical material distributing bulge 5.4, the vertex of the material distributing bulge 5.4 is over against the lower end of the feeding core tube 4, and all the separating wings 5.3 are uniformly arranged around the axis of the material distributing bulge 5.4. The dividing wing 5.3 is here a sector cylinder, the arc of which faces outwards and the apex angle of which faces the axis of the distributing projection 5.4. The number of separating wings 5.3 and the size of the discharge openings can be determined here depending on the actual pulp and the injection object.

The outer wall of the shell 1 is also provided with an air inlet interface 7 and an air outlet interface 2.2 which are communicated with the airflow cavity 1.1. In this embodiment, the exhaust port 2.2 is disposed on the upper cover plate 2, where the exhaust port 2.2 is disposed above the thinnest portion of the outer wall of the housing 1, and an exhaust cap 2.3 is disposed at the exhaust port 2.2, and the exhaust cap 2.3 controls the opening and closing of the exhaust port 2.2. The number of the air inlet interfaces 7 is two, and the air inlet interfaces are respectively a positive air inlet interface 7-A and a negative air inlet interface 7-B, the negative air inlet interface 7-B and the positive air inlet interface 7-A are respectively arranged at two sides of the narrowing of the air flow channel of the airflow cavity 1.1, and the airflow inlet directions of the negative air inlet interface 7-B and the positive air inlet interface 7-A are tangent to the outer wall of the rotor 6, so as to realize the positive and negative rotation of the rotor 6. When air is sucked from the positive air inlet interface 7-A, the reverse air inlet interface 7-B is closed, and the rotor 6 rotates clockwise; when air is sucked from the reverse air inlet port 7-B, the positive air inlet port 7-A is closed, and the rotor 6 rotates anticlockwise. The direction of the slurry jet is adjusted by controlling the direction of rotation of the rotor 6.

When the pneumatic rotary sprayer of the embodiment works, when compressed air is introduced into one of the air inlet ports 7 (the other one is closed), the compressed air sequentially enters each gas space of the gas flow passage, the compressed air impacts the rotor blades 6.1 to push the rotor 6 to rotate at a low speed, the rotor 6, one side of each rotor blade 6.1 is always kept in contact with the inner wall of the gas flow chamber 1.1 during the rotation of the rotor 6, the other side of each rotor blade is placed in the accommodating groove 6.2, the length of each rotor blade is changed along with the rotation of the rotor 6, the volume of each gas space is changed along with the rotation of the rotor, the volume of each gas space is the maximum when the gas space rotates to the position below the air outlet port 2.2, high-pressure gas flow in the gas space is discharged by the air outlet cap 2.3, and the generated pressure difference pushes the rotor blades 6.1 to drive the rotor 6 and the centrifugal flywheel 5 to rotate at a high speed, at this time, the repair slurry pumped by the feeding core tube 4 falls into the centrifugal flywheel 5, and is thrown out from the discharge port 5.4 of the centrifugal flywheel 5 at a high speed under the action of centrifugal force generated by high-speed rotation.

The pneumatic rotary sprayer of the embodiment has a simple structure and few easily-damaged parts, the rotating speed is directly related to the fed compressed air quantity, the larger the air quantity is, the higher the rotating speed is, and the rotating speed can reach more than 15,000 rpm; in addition, the rotary sprayer is waterproof and leakage-free, the compressed air has a cooling effect and does not have the problem of burning, even if blockage occurs due to the fact, the burning problem does not exist, in addition, the discharged compressed air can effectively dilute harmful gas, and the working environment is safer.

In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.

The features of the embodiments and embodiments described herein above may be combined with each other without conflict.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A pneumatic rotary sprayer is characterized in that: the centrifugal type air flow machine comprises a shell, a rotor, a feeding core pipe and a centrifugal flywheel, wherein the shell is a hollow cylinder, an inner hole of the shell is an eccentrically arranged cylindrical airflow cavity, the upper end and the lower end of the airflow cavity are sealed, the outer wall of the shell is also provided with a positive air inlet interface and an exhaust interface which are communicated with the airflow cavity, the rotor is a hollow cylinder, the rotor is accommodated in the airflow cavity and can rotate, a crescent gas flow passage is formed between the outer wall of the rotor and the inner wall of the airflow cavity, a plurality of rotor blades are arranged around the outer wall of the rotor, the outer wall of the rotor is provided with a plurality of radially extending accommodating grooves, one side of each rotor blade is arranged in one accommodating groove and can move, the other side of each rotor blade is contacted with the inner wall of the airflow cavity, the lower end of the rotor extends out of the shell and is connected, the centrifugal flywheel comprises a flywheel top plate, a flywheel bottom plate and separation wings arranged at a plurality of intervals between the flywheel top plate and the flywheel bottom plate, wherein each separation wing is connected with the upper end of the separation wing and the lower end of the separation wing is connected with the flywheel top plate and the flywheel bottom plate, and a discharge hole is formed between every two adjacent separation wings.

2. A pneumatic spinner as in claim 1, wherein: the rotor is characterized in that an upper cover plate is arranged at the upper end of the shell, a through hole is formed in the middle of the upper cover plate, a bearing mounting groove is formed in the lower portion of the through hole, a sealing bearing is arranged in the bearing mounting groove, a step joint is arranged at the upper end of the rotor and inserted into an inner ring of the sealing bearing, the upper cover plate seals the upper end of the airflow cavity, a lower cover plate identical to the upper cover plate is arranged at the lower end of the shell, and the lower cover plate seals the lower end of the.

3. A pneumatic spinner as in claim 2, wherein: the upper cover plate is fixedly connected with the upper end of the shell through the fixing bolts.

4. A pneumatic spinner as in claim 1, wherein: the shell is provided with a reverse air inlet interface communicated with the airflow cavity, the reverse air inlet interface and the forward air inlet interface are respectively arranged at two sides of the narrowing of the gas flow passage, and the airflow inlet directions of the reverse air inlet interface and the forward air inlet interface are tangent to the outer wall of the rotor.

5. A pneumatic spinner as in claim 1, wherein: the number of the rotor blades is 5-10, and all the rotor blades are uniformly distributed around the outer wall of the rotor.

6. A pneumatic spinner as in claim 1, wherein: the center of the flywheel bottom plate is provided with a conical material distributing bulge, the vertex of the material distributing bulge is over against the lower end of the feeding core tube, and all the separating wings are uniformly arranged around the axis of the material distributing bulge.

7. A pneumatic spinner as in claim 1, wherein: the feeding core tube is a stepped pipeline with a thick upper end and a thin lower end, the lower end of the feeding core tube penetrates through the middle of the rotor and extends into the centrifugal flywheel, the stepped transition position of the feeding core tube is pressed on the upper end of the shell, and a pipeline connector is arranged at the upper end of the feeding core tube.