Pneumatic motor type pipeline inner wall spraying device

Abstract

The utility model discloses a pneumatic motor type pipeline inner wall spraying device. The pneumatic motor type pipeline inner wall spraying device comprises a pneumatic motor module, a rotating nozzle, a sleeve, a left adapter shaft sleeve, a right adapter shaft sleeve, an air pipe, a material pipe, a plurality of pairs of connecting rod arms and a plurality of bearing pulleys arranged at the outer ends of the pairs of connecting rod arms. The pneumatic motor drives the rotary spray head to rotate at a high speed, coating materials are conveyed into the inner cavity of the rotary spray head, and the coating materials are thrown out from the discharging holes in the side face of the spray head through high-speed rotation of the rotary spray head, so that spraying treatment of the inner wall of a pipeline is achieved, and the connecting rod arms can be rapidly unfolded through the movable adapter shaft sleeve; and the connecting rod arm can be quickly stored, so that the pneumatic motor type pipeline inner wall spraying device disclosed by the utility model is convenient to carry, transport and store.

Description

Technical Field

[0001] This utility model relates to the field of surface spraying technology, specifically to a pneumatic motor-driven pipe inner wall spraying device. Background Technology

[0002] To extend the service life of pipelines, it is generally necessary to perform surface treatment on the inner wall of the pipeline. This is achieved by spraying a wear-resistant and corrosion-resistant coating onto the inner wall of the pipeline, thereby increasing its service life.

[0003] Existing pipe inner wall spraying devices are generally large in size and complex in structure, making them cumbersome to use and carry. Furthermore, due to their complex structure, the products are bulky and heavy, making them inconvenient to transport and carry.

[0004] Furthermore, existing pipe inner wall spraying devices generally use a single pulley structure. During use, the pulley needs to withstand considerable pressure due to its weight, making it prone to damage. Replacing a damaged pulley is also quite troublesome. To improve the service life of the pulley, metal pulleys are often used, but metal pulleys are prone to scratching the inner wall of the pipe. Utility Model Content

[0005] This utility model provides a pneumatic motor-driven pipe inner wall spraying device that is small in size, lightweight, has a long service life, and is easy to disassemble and maintain.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A pneumatic motor type pipe inner wall spraying device includes a pneumatic motor module, a rotary nozzle, a sleeve, left and right adapter bushings, an air pipe, a material pipe, several pairs of connecting rod arms, and several bearing pulleys disposed at the outer ends of the several pairs of connecting rod arms.

[0008] The rotary nozzle is mounted and fixed on the rotating shaft at the front end of the pneumatic motor module. Driven by the pneumatic motor module, it rotates at high speed. Several discharge ports are regularly arranged on the side of the rotary nozzle, and an inner cavity is provided inside. The discharge ports are connected to the inner cavity. The coating material is transported to the inner cavity of the rotary nozzle through the material pipe. Driven by the pneumatic motor module, the rotary nozzle rotates at high speed, thereby causing the coating material to rotate at high speed in the inner cavity of the rotary nozzle. Due to centrifugal force, the coating material is thrown out from the discharge ports for spraying.

[0009] The side of the rotary nozzle is covered with a mesh, and the mesh forms several discharge holes at the several discharge port positions. The coating material thrown out from the discharge port is dispersed and thrown out through the several discharge holes.

[0010] Alternatively, the aforementioned discharge holes may be directly and regularly arranged on the rotating nozzle;

[0011] The sleeve is installed and fixed at the rear end of the pneumatic motor module as an extension rod. The left and right adapter bushings include a left adapter bushing and a right adapter bushing. The left adapter bushing is fitted onto the sleeve and slides back and forth along the outer surface of the sleeve. It is positioned and fixed at a designated position on the sleeve by a fixing nut, forming a movable adapter bushing. The right adapter bushing is fitted onto the pneumatic motor module and is tightened and fixed onto the pneumatic motor module by bushing fixing bolts, forming a fixed adapter bushing.

[0012] The plurality of pairs of connecting arms are installed between the left and right transition bushings. Each pair of connecting arms includes intersecting connecting rods. The rear end of each connecting rod is rotatably mounted on the left and right transition bushings through a connecting rod transition bolt and a nut. The rear end of each connecting rod rotates about the rod portion of the connecting rod transition bolt. The front end of each connecting rod is equipped with a pair of bearing pulleys through a pulley pin. The pair of bearing pulleys rotate about the rod portion of the pulley pin. The middle portions of each connecting rod are rotatably connected together through connecting rod pins. The intersecting connecting rods rotate about the rod portion of the connecting rod pin in the middle portion.

[0013] The pneumatic motor module is connected to the air outlet of the air source generator through the air pipe, and the air source generator provides the working air source for the pneumatic motor module.

[0014] The air tube passes through the sleeve and is connected to the air inlet of the pneumatic motor in the pneumatic motor module at its front end.

[0015] The feed tube passes through the sleeve and extends through the sleeve into the inner cavity of the rotary nozzle, delivering the coating material into the inner cavity of the rotary nozzle.

[0016] Furthermore, the pneumatic motor module includes an outer casing, a pneumatic motor, a rear end cover, an adapter rod, and a baffle.

[0017] The outer casing serves as the housing of the pneumatic motor module. The pneumatic motor is installed in the rear end cavity of the outer casing and is fixed in the rear end cavity of the outer casing by the rear end cover.

[0018] The rear end cap serves as an intermediate and connecting component between the sleeve and the outer sleeve, and its front and rear ends are regularly provided with threaded rods that connect to the sleeve and the outer sleeve.

[0019] An air inlet is provided on the rear end face of the rear end cover, and several air passages are regularly arranged inside it. Several air outlets are provided on the front end face of the rear end cover. The air inlet is connected to the several air passages and the several air outlets. High-pressure gas flows in from the air pipe and the air inlet, is diverted by the several air passages, and flows out from the several air outlets, and is blown onto the fan blades of the pneumatic motor, driving the fan blades of the pneumatic motor to rotate at high speed. The high-speed rotating fan blades drive the motor shaft to rotate at high speed, and the motor shaft drives the rotating nozzle to rotate at high speed through the adapter rod.

[0020] The adapter rod extends out of the baffle and connects to the rotating nozzle. The baffle serves as the front cover of the outer casing, encapsulating its front end.

[0021] Furthermore, a ball bearing is installed at the front end of the outer sleeve, the adapter rod passes through the ball bearing and rotates stably within the ball bearing, and the baffle encloses the ball bearing and presses it firmly into the front end slot of the outer sleeve.

[0022] Furthermore, the side of the outer jacket is regularly provided with a number of exhaust holes at the positions of several air outlets of the pneumatic motor. The gas blown over the pneumatic motor is discharged through the several air outlets on the pneumatic motor and the several exhaust holes on the outer jacket.

[0023] Furthermore, the quick-connect fitting for the air pipe is installed in the air inlet of the rear end cover, and the front end of the air pipe is connected to the air inlet through the quick-connect fitting.

[0024] Furthermore, the rear end of the sleeve is regularly provided with a threaded portion, and the inner wall of the fixing nut is provided with a thread that mates with the threaded portion. The fixing nut is fitted on the sleeve and rotates and slides back and forth on its threaded portion. The fixing nut is located at the rear end of the left rotary bushing, drives the left rotary bushing to slide back and forth on the sleeve, and serves as a positioning and fixing component for the left rotary bushing.

[0025] Alternatively, the fixing nut and the threaded portion can be omitted, and the left-hand pivot bushing can be fixed at a designated position on the sleeve by the plurality of bushing fixing bolts.

[0026] Furthermore, the front end of the sleeve is regularly provided with a material tube extension hole. The material tube extends into the sleeve from the rear end of the sleeve and extends out of the sleeve from the material tube extension hole at the front end of the sleeve. The front end of the material tube extends forward along the outside of the pneumatic motor module and passes through the right rotating shaft sleeve to enter the inner cavity of the rotary nozzle. The right rotating shaft sleeve is provided with a material tube positioning hole through the front and rear to facilitate the passage of the material tube. The front end of the material tube passes through the material tube positioning hole on the right rotating shaft sleeve and is pressed and fixed on the outer surface of the pneumatic motor module by the right rotating shaft sleeve.

[0027] Furthermore, the plurality of discharge ports are arranged at an angle on the side of the rotating nozzle.

[0028] Furthermore, one axial side of each of the plurality of discharge ports is regularly provided with a beveled surface along the rotation direction of the rotary nozzle.

[0029] Furthermore, the bearing pulley is a plastic-coated bearing pulley.

[0030] The beneficial effects of this utility model are:

[0031] 1. This utility model uses a pneumatic motor to drive a rotary nozzle to rotate at high speed. Coating material is fed into the inner cavity of the rotary nozzle, and the material is ejected from several discharge holes on the side of the nozzle after high-speed rotation, thus achieving spraying treatment of the inner wall of the pipe. This utility model uses several pairs of connecting arms arranged between a pair of adapter sleeves, and a pair of bearing pulleys regularly arranged at the outer ends of these connecting arms. The movable adapter sleeves allow for quick adjustment of the included angle between the connecting arms, thereby adjusting the position of the bearing pulleys located at the outermost ends of the connecting arms. This ensures that the bearing pulleys are in contact with the inner wall of the pipe, allowing the spraying device to slide rapidly between the pipe walls for spraying treatment. The movable adapter sleeves allow for quick deployment and retraction of the connecting arms, facilitating the carrying, transportation, and storage of this pneumatic motor-driven pipe inner wall spraying device.

[0032] 2. The bearing pulley system uses a pair of bearing pulleys. Compared to a single pulley, the use of two pulleys greatly enhances the smoothness and stability of the entire device. Furthermore, the use of plastic-coated bearing pulleys instead of ordinary pulleys further improves the smoothness and stability of the device and avoids scratching the inner wall of the pipe by metal pulleys.

[0033] 3. This utility model has several discharge ports regularly arranged on the side of the rotating nozzle, and the axial surfaces of several discharge ports are beveled to form beveled surfaces, which can greatly improve the stability and smoothness of the discharge, thereby improving the spraying effect. Attached Figure Description

[0034] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0035] Figure 2 for Figure 1 Front view;

[0036] Figure 3 for Figure 2 A sectional view along the AA direction;

[0037] Figure 4 for Figure 1 Enlarged structural diagram of the rotating nozzle;

[0038] Figure 5 for Figure 3 Internal structure diagram of the middle and rear end caps;

[0039] Figure 6 for Figure 1 Storage status diagram;

[0040] The diagram is marked as follows:

[0041] 1. Pneumatic motor module; 101. Outer casing; 102. Pneumatic motor; 1021. Motor shaft; 103. Rear end cover; 104. Quick air hose connector; 105. Adapter rod; 106. Ball bearing; 107. Baffle.

[0042] 2. Rotating nozzle, 201, discharge port, 2011, beveled surface, 202, nozzle threaded hole;

[0043] 3. Mesh screen;

[0044] 4. Sleeve, 401. Threaded part, 402. Material tube protrusion hole;

[0045] 5. Adapter bushing; 51. Bushing fixing bolt; 501. Material tube positioning hole;

[0046] 6. Secure the nuts;

[0047] 7. Trachea; 71. Trachea adapter;

[0048] 8. Material pipe; 81. Material pipe adapter;

[0049] 9. Connecting rod; 91. Connecting rod adapter bolt; 92. Connecting rod pin.

[0050] 10. Bearing pulley; 1001. Pulley pin;

[0051] 1031, air inlet; 1032, air passage; 1033, air outlet. Detailed Implementation

[0052] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0054] like Figure 1-5 As shown, this utility model discloses a pneumatic motor type pipe inner wall spraying device, including a pneumatic motor module 1, a rotating nozzle 2, a screen 3, a sleeve 4, an adapter bushing 5, a fixing nut 6, an air pipe 7, a material pipe 8, several pairs of connecting rods 9, and several bearing pulleys 10 disposed at the outer ends of the several pairs of connecting rods.

[0055] The rotating nozzle 2 is mounted and fixed on the rotating shaft at the front end of the pneumatic motor module 1. Driven by the pneumatic motor module 1, the rotating nozzle 2 rotates at high speed via the rotating shaft. Figure 4 As shown, the side of the rotary nozzle 2 is regularly provided with several discharge ports 201. The coating material is transported into the inner cavity of the rotary nozzle 2 through the material pipe 8. The rotary nozzle 2 is driven to rotate at high speed by the pneumatic motor module 1, thereby causing the coating material to rotate at high speed in the inner cavity of the rotary nozzle 2. Due to the centrifugal force, the material is thrown out from the several discharge ports 201 on the side of the rotary nozzle 2 and sprayed onto the inner wall of the pipe.

[0056] Furthermore, the outer surface of the rotating nozzle 2 is wrapped with a mesh 3, and several mesh holes on the mesh 3 form several discharge holes at the discharge port 201. The coating material thrown out of the discharge port 201 is further dispersed through the discharge holes, so that it is evenly thrown out from the discharge holes and evenly sprayed onto the inner wall of the pipe.

[0057] Furthermore, the mesh screen 3 can be omitted, and several discharge holes can be formed by regularly opening holes on the side of the rotating nozzle 2.

[0058] Furthermore, in order to smoothly eject the coating material from the inner cavity of the rotating nozzle 2, such as... Figure 4As shown, several discharge ports 201 are angled and arranged on the side of the rotating nozzle 2. Simultaneously, one axial side of each discharge port 201 is beveled to form a beveled surface 2011. Figure 4 When the rotary nozzle 2 rotates counterclockwise, the coating material in its internal cavity is forced to rotate counterclockwise along its inner wall due to centrifugal force. The counterclockwise rotating coating material is smoothly and stably ejected along the oblique cut surfaces 2011 of several discharge ports, thereby improving the spraying effect.

[0059] Furthermore, a sleeve 4 is installed at the rear end of the pneumatic motor module 1. The inner wall of the sleeve 4 is regularly threaded at the front end, thus forming a threaded hole in the sleeve. A threaded rod that mates with the threaded hole in the sleeve is provided at the rear end of the pneumatic motor module 1. The sleeve 4 is tightened and fixed at the rear end of the pneumatic motor module 1 to serve as an adapter rod and extension rod for the nozzle device.

[0060] Furthermore, a pair of adapter bushings 5 ​​are installed on the sleeve 4 and the pneumatic motor module 1. The pair of adapter bushings 5 ​​includes a left adapter bushing and a right adapter bushing. The left adapter bushing is fitted onto the sleeve 4 and slides back and forth along the outer surface of the sleeve 4. It is positioned and fixed in a designated position on the sleeve 4 by a fixing nut 6, forming a movable adapter bushing. The right adapter bushing is fitted onto the pneumatic motor module 1 and is tightened and fixed to the pneumatic motor module 1 by bushing fixing bolts 51, forming a fixed adapter bushing.

[0061] Furthermore, the outer surface of the rear end of the sleeve 4 is regularly threaded, forming a threaded portion 401. The left-hand rotating bushing slides back and forth on the sleeve 4 driven by the fixing nut 6. Therefore, the fixing nut 6 is also fitted onto the sleeve 4 and is located at the rear end of the left-hand rotating bushing, cooperating with the threaded portion 401 of the sleeve for rotation. The fixing nut 6 rotates and slides back and forth along the threaded portion 401, thereby driving the left-hand rotating bushing to slide back and forth on the sleeve 4.

[0062] Furthermore, several pairs of connecting rod arms are connected between the left and right transition bushings, each pair of connecting rod arms including intersecting connecting rods 9. The rear end of the connecting rod 9 is rotatably mounted on the left and right transition bushings through the cooperation of connecting rod transition bolts 91 and nuts, and the rear end of the connecting rod 9 rotates about the screw part of the connecting rod transition bolt 91; its front end is equipped with a pair of bearing pulleys 10 through pulley pins 1001, and the pair of bearing pulleys 10 rotates about the rod part of the pulley pins 1001; their middle parts are connected together by intersecting connecting rod pins 92, and the intersecting connecting rods 9 rotate about the rod part of the middle connecting rod pin 92.

[0063] Furthermore, the aforementioned connecting rod adapter bolt 91 connects the two components with a nut. The threaded portion of the connecting rod adapter bolt 91 passes through the through holes of the two components and is locked with the nut. The middle of its threaded portion serves as the rotation axis of the rotating component. The connecting rod pin 92 and pulley pin 1001 are flat-headed pins with holes. One end is a flat head with a larger diameter, used to abut against the insertion end; the other end is a rod with a smaller diameter and holes, used to pass through the through holes of the two connecting components, thus serving as the rotation axis between the two components. The through hole of the rod is located at the tail of the rod. After the rod passes through the two components, the through hole at its tail protrudes from the two components and engages with a chuck or wire to lock it in the through holes of the two components, serving as the rotation axis between the two components.

[0064] Furthermore, the connecting rod adapter bolt has a smooth rod in the middle of its screw section and a threaded rod at its front end. The threaded rod at the front end is locked in place with the nut, while the smooth rod in the middle serves as the pivot of the connecting rod 9.

[0065] Furthermore, the aforementioned connecting rod adapter bolt 91 and nut can be replaced with a flat-headed pin with a hole and a chuck. Of course, the aforementioned connecting rod pin, pulley pin, and chuck can also be replaced with bolts and nuts.

[0066] Furthermore, several connecting rod adapter bosses are regularly arranged on the outer surface of the left and right adapter bushings 5, and connecting rod slots are regularly arranged in the middle of the connecting rod adapter bosses. The front end of the connecting rod 9 is inserted into the connecting rod slot and passes through the connecting rod adapter boss and the connecting rod 9 by the connecting rod adapter bolt 91, thereby rotatably connecting the connecting rod 9 to the connecting rod adapter boss on the outer surface of the left and right adapter bushings. The connecting rod 9 rotates about the rod part of the connecting rod adapter bolt 91 as the axis.

[0067] Furthermore, in one embodiment, one end of the left and right transition bushings 5 ​​is regularly provided with outwardly protruding polygonal flange bosses, and a number of connecting rod transition bosses are arranged in a circular array on the outside of the polygonal flange bosses.

[0068] Furthermore, the connecting arms of this invention are provided in three pairs, which can form a stable triangular structure.

[0069] like Figure 1 and Figure 6 As described above, after driving the movable adapter sleeve to the left, several pairs of connecting rod arms can be quickly retracted inward, thereby facilitating the carrying, transportation, and storage of the portable pipe inner wall spraying device of this utility model.

[0070] like Figure 1 As shown, the retaining nut 6 slides forward on the threaded portion 401 (as shown). Figure 1(Sliding to the right from the center) and driving the left pivot sleeve 5 to slide forward. The left pivot sleeve drives the intersecting connecting rod arms to rotate around the connecting rod adapter bolt 91 and connecting rod pin 92, thereby driving the intersecting connecting rod arms to move closer together, thus adjusting the crossing angle between the connecting rod arms, and finally controlling and adjusting the distance between the bearing pulleys 10 and the pneumatic motor module 1, so that the bearing pulleys 10 contact and fit with the inner wall of the pipe. The bearing pulleys 10 serve as pulleys for the entire device, sliding along the inner wall of the pipe.

[0071] Furthermore, the aforementioned fixing nut 6 and threaded portion 401 can be omitted. The left rotating bushing 5 can be directly fixed at a designated position on the sleeve 4 through the cooperation of the left rotating bushing 5 and several bushing fixing bolts 51. By loosening the bushing fixing bolts 51, the left rotating bushing 5 is released, and the released left rotating bushing 5 can slide back and forth along the sleeve 4; by tightening the bushing fixing bolts 51, the left rotating bushing 5 is fixed, thus fixing the left rotating bushing 5 at a designated position on the sleeve 4.

[0072] Furthermore, in this utility model's pneumatic motor-driven pipe inner wall spraying device, each connecting rod has a pair of bearing pulleys 10 at its outer end. These bearing pulleys 10 are regularly arranged on the front and rear sides of each connecting rod via pulley pins 1001. Compared to a single pulley, the use of two pulleys greatly enhances the smoothness and stability of the entire device. Simultaneously, replacing ordinary pulleys with bearing pulleys further improves the device's smoothness and stability.

[0073] Furthermore, the bearing pulley 10 adopts a plastic-coated bearing pulley, and the outer side of its bearing is made of plastic tire. The plastic tire can avoid or reduce damage to the inner wall of the pipe, thereby avoiding scratches on the inner wall of the pipe.

[0074] Furthermore, the pneumatic motor module 1 is connected to the air outlet of the air source generator via the air pipe 7, thereby providing the pneumatic motor module 1 with working air through the air source generator. The working principle of the pneumatic motor module 1 is as follows: the pneumatic motor inside is blown by high-pressure gas, which drives the internal fan assembly to rotate, and the fan assembly in turn drives the rotating shaft to rotate at high speed.

[0075] Furthermore, such as Figure 1 The tracheal tube 7 is provided with a tracheal tube adapter 71 at its rear end, which is connected to the air outlet of the air source generator. Preferably, the tracheal tube adapter is a straight tracheal tube connector.

[0076] Furthermore, the air tube 7 passes through the sleeve 4, and its front end is connected to the air inlet of the pneumatic motor in the pneumatic motor module 1.

[0077] Furthermore, such as Figure 1As shown, the material tube 8 also passes through the sleeve 4 and extends through the sleeve 4 into the inner cavity of the rotary nozzle 2, delivering the coating material into the inner cavity of the rotary nozzle 2.

[0078] Furthermore, a material tube adapter 81 is provided at the rear end of the material tube 8. In order to introduce the material tube 8 into the inner cavity of the rotary nozzle 2, the front end side of the sleeve 4 is provided with an opening to form a material tube extension hole 402. The material tube 8 extends into the sleeve 4 from the rear end of the sleeve 4, and extends out of the sleeve from the material tube extension hole 402 at the front end of the sleeve 4, and then extends forward along the outside of the pneumatic motor module 1 and into the inner cavity of the rotary nozzle 2.

[0079] Furthermore, in order to fix the feed tube 8 and improve its stability, a feed tube positioning hole 501 is provided through the right rotating shaft sleeve to facilitate the passage of the feed tube 8. The front end of the feed tube 8 passes through the feed tube positioning hole 501 on the right rotating shaft sleeve and is fixed by the pressing of the right rotating shaft sleeve, thereby firmly fixing the feed tube 8 to the outer surface of the pneumatic motor module 1.

[0080] like Figure 3 As shown, the pneumatic motor module 1 includes an outer casing 101, a pneumatic motor 102, a rear end cover 103, an adapter rod 105, and a baffle 107. The pneumatic motor 102 is installed in the rear end cavity of the outer casing 101 and is pressed and fixed within the rear end cavity of the outer casing 101 by the rear end cover 103. The motor shaft at the front end of the pneumatic motor 102 is fixedly connected to the rear end of the adapter rod 105. The adapter rod 105 extends out of the baffle 107 as the rotation shaft of the pneumatic motor module 1 and is fixedly connected to the rotating nozzle 2. The rotating nozzle 2 is fixed to the front end of the adapter rod 105.

[0081] Furthermore, to improve the stability of the adapter rod 105 during rotation, a ball bearing 106 is provided at the front end of the outer sleeve 101. The adapter rod 105 passes through the ball bearing 106 and rotates stably within it. The baffle 107 is used to seal the ball bearing 106 and serves as the front end cover of the outer sleeve 101.

[0082] like Figure 5 The diagram shows the structure of the rear end cover 103. The rear end cover 103 serves as the rear end cover of the outer sleeve 101 and also as a connecting component between the pneumatic motor module 1 and the sleeve 4. Threads are regularly arranged at both ends of the rear end cover, forming threaded rods. The threaded rod at the front end of the rear end cover engages with the threaded hole at the rear end of the outer sleeve 101, tightening and fixing it to the rear end of the outer sleeve 101; the threaded rod at the rear end of the rear end cover engages with the threaded hole at the front end of the sleeve 4, thereby tightening and fixing the sleeve 4 to the rear end of the rear end cover.

[0083] Furthermore, an air inlet 1031 is provided on the rear end face of the rear end cover 103, with several air passages 1032 regularly arranged inside it, and several air outlets 1033 are provided on its front end face. The air inlet 1031 is connected to the air outlets 1033 through the air passages 1032. High-pressure gas flows in from the air inlet 1031, is diverted by the air passages 1032, and flows out from the air outlets 1033, blowing onto the fan blades of the pneumatic motor 102, driving the fan blades of the pneumatic motor to rotate at high speed. The high-speed rotating fan blades drive the motor shaft 1021 to rotate at high speed, and the motor shaft drives the rotating nozzle 2 to rotate at high speed through the adapter rod 105.

[0084] Furthermore, the inner wall of the air inlet 1031 is regularly provided with threads to form a threaded hole. The threaded hole in the air inlet 1031 is equipped with a quick-connect air pipe 104. The front end of the air pipe 7 is inserted into the quick-connect air pipe 104 to achieve communication with the air inlet 1031.

[0085] Preferably, the quick-connect endotracheal connector 104 is an externally threaded endotracheal connector.

[0086] Furthermore, on the side of the outer casing 101, exhaust holes are regularly arranged at the air outlet position of the pneumatic motor 102, so that the gas blown over the pneumatic motor 102 can be discharged through the exhaust holes on the outer casing.

[0087] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pneumatic motor-driven pipe inner wall spraying device, characterized in that: It includes a pneumatic motor module (1), a rotary nozzle (2), a sleeve (4), left and right adapter bushings (5), an air pipe (7), a material pipe (8), several pairs of connecting rod arms, and several bearing pulleys (10) disposed at the outer ends of the several pairs of connecting rod arms. The rotary nozzle (2) is mounted and fixed on the rotating shaft at the front end of the pneumatic motor module (1). It rotates at high speed driven by the pneumatic motor module (1). Several discharge ports (201) are regularly arranged on the side of the rotary nozzle (2). An inner cavity is provided inside the nozzle. The discharge ports (201) are connected to the inner cavity. The coating material is transported to the inner cavity of the rotary nozzle through the material pipe (8). The rotary nozzle (2) rotates at high speed driven by the pneumatic motor module (1), thereby driving the coating material to rotate at high speed in the inner cavity of the rotary nozzle. Due to the centrifugal force, the coating material is thrown out from the discharge ports (201) for spraying. The rotating nozzle (2) is wrapped with a mesh (3) on its side. The mesh (3) forms several discharge holes at the positions of the several discharge ports (201). The coating material thrown out by the discharge ports is dispersed and thrown out through the several discharge holes. Alternatively, the aforementioned discharge holes may be directly and regularly arranged on the rotating nozzle (2); The sleeve (4) is installed and fixed at the rear end of the pneumatic motor module (1) as an extension rod. The left and right transition bushings (5) include a left transition bushing and a right transition bushing. The left transition bushing is fitted on the sleeve (4) and slides back and forth along the outer surface of the sleeve (4). It is positioned and fixed at a designated position on the sleeve (4) by a fixing nut (6) to form a movable transition bushing. The right transition bushing is fitted on the pneumatic motor module (1) and is tightened and fixed on the pneumatic motor module (1) by a bushing fixing bolt (51) to form a fixed transition bushing. The plurality of pairs of connecting arms are installed between the left and right transition bushings. Each pair of connecting arms includes intersecting connecting rods (9). The rear end of the connecting rod (9) is rotatably mounted on the left and right transition bushings through a connecting rod transition bolt (91) and a nut. The rear end of the connecting rod (9) rotates about the rod portion of the connecting rod transition bolt. The front end of the connecting rod (9) is equipped with a pair of bearing pulleys (10) through a pulley pin (1001). The pair of bearing pulleys (10) rotate about the rod portion of the pulley pin (1001). The middle parts of the connecting rods (9) are rotatably connected together through connecting rod pins (92). The intersecting connecting rods (9) rotate about the rod portion of the connecting rod pin (92) in the middle part. The pneumatic motor module (1) is connected to the air outlet of the air source generator through the air pipe (7), and the air source generator provides working air to the pneumatic motor module (1); The air tube (7) passes through the sleeve (4) and is connected to the air inlet of the pneumatic motor in the pneumatic motor module (1) at its front end; The material tube (8) passes through the sleeve (4) and extends through the sleeve (4) into the inner cavity of the rotary nozzle (2) to deliver the coating material into the inner cavity of the rotary nozzle (2).

2. The pneumatic motor-driven pipe inner wall spraying device according to claim 1, characterized in that: The pneumatic motor module (1) includes an outer casing (101), a pneumatic motor (102), a rear end cover (103), an adapter rod (105), and a baffle (107); The outer casing (101) serves as the outer shell of the pneumatic motor module (1). The pneumatic motor (102) is installed in the rear end cavity of the outer casing (101) and is fixed in the rear end cavity of the outer casing (101) by the rear end cover (103). The rear end cap (103) serves as an intermediate and connecting component between the sleeve (4) and the outer sleeve (101), and its front and rear ends are regularly provided with threaded rods that connect to the sleeve (4) and the outer sleeve (101). An air inlet (1031) is provided on the rear end face of the rear end cover (103), and several air passages (1032) are regularly arranged inside it. Several air outlets (1033) are provided on its front end face. The air inlet (1031) is connected to the several air outlets (1033) through the several air passages (1032). High-pressure gas flows in from the air pipe (7) and the air inlet (1031), is diverted by the several air passages (1032), and flows out from the several air outlets (1033) and blows onto the fan blades of the pneumatic motor (102), driving the fan blades of the pneumatic motor to rotate at high speed. The high-speed rotating fan blades drive the motor shaft to rotate at high speed, and the motor shaft drives the rotating nozzle (2) to rotate at high speed through the adapter rod (105). The adapter rod (105) extends out of the baffle (107) and connects to the rotating nozzle (2). The baffle (107) serves as the front cover of the outer casing (101), encapsulating its front end.

3. The pneumatic motor-driven pipe inner wall spraying device according to claim 2, characterized in that: A ball bearing (106) is installed at the front end of the outer sleeve (101). The adapter rod (105) passes through the ball bearing (106) and rotates stably in the ball bearing (106). The baffle (107) encloses the ball bearing (106) and presses the ball bearing (106) into the front end slot of the outer sleeve (101).

4. The pneumatic motor-driven pipe inner wall spraying device according to claim 2, characterized in that: The outer casing (101) has a number of exhaust holes regularly arranged at the positions of several air outlets of the pneumatic motor (102) on its side. The gas blown over the pneumatic motor (102) is discharged through several air outlets on the pneumatic motor and several exhaust holes on the outer casing.

5. A pneumatic motor-driven pipe inner wall spraying device according to claim 2, characterized in that: The quick-connector for the air pipe is installed in the air inlet (1031) of the rear cover (103), and the front end of the air pipe (7) is connected to the air inlet through the quick-connector for the air pipe.

6. A pneumatic motor-driven pipe inner wall spraying device according to any one of claims 1-5, characterized in that: The sleeve (4) has a threaded portion (401) at its rear end. The inner wall of the fixing nut (6) has a thread that mates with the threaded portion (401). The fixing nut (6) is fitted onto the sleeve (4) and rotates and slides back and forth on its threaded portion (401). The fixing nut (6) is located at the rear end of the left rotating bushing and drives the left rotating bushing to slide back and forth on the sleeve (4), and serves as a positioning and fixing component for the left rotating bushing. Alternatively, the fixing nut (6) and the threaded portion (401) can be omitted, and the left-hand pivot bushing can be fixed at a designated position on the sleeve (4) by the plurality of bushing fixing bolts.

7. A pneumatic motor-driven pipe inner wall spraying device according to claim 6, characterized in that: The front end of the sleeve (4) is regularly provided with a material tube extension hole (402). The material tube (8) extends into the sleeve (4) from the rear end of the sleeve (4) and extends out of the sleeve from the material tube extension hole (402) at the front end of the sleeve (4). The front end of the material tube (8) extends forward along the outside of the pneumatic motor module (1) and passes through the right rotating shaft sleeve to enter the inner cavity of the rotary nozzle (2). The right rotating shaft sleeve is provided with a material tube positioning hole (501) that facilitates the passage of the material tube (8). The front end of the material tube (8) passes through the material tube positioning hole (501) on the right rotating shaft sleeve and is fixed on the outer surface of the pneumatic motor module (1) by the pressing of the right rotating shaft sleeve.

8. A pneumatic motor-driven pipe inner wall spraying device according to claim 1, characterized in that: The plurality of discharge ports are arranged at an angle on the side of the rotating nozzle (2).

9. A pneumatic motor-driven pipe inner wall spraying device according to claim 8, characterized in that: One axial side of each of the plurality of discharge ports is regularly provided with a beveled surface (2011) along the rotation direction of the rotary nozzle.

10. A pneumatic motor-driven pipe inner wall spraying device according to claim 1, characterized in that: The bearing pulley (10) is a plastic-coated bearing pulley.

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