Air pressure type spraying device and method for tunnel inner wall coating

Abstract

The invention belongs to the technical field of coating spraying, and particularly relates to an air pressure type spraying device and method for coating on the inner wall of a tunnel, and the air pressure type spraying device comprises a spraying mechanism, a hardening mechanism and a wall cleaning mechanism. The spraying mechanism comprises a spraying assembly for spraying paint to the inner wall of the tunnel during working and a driving assembly for driving the spraying assembly to move at a constant speed in the tunnel during working. The hardening mechanism is installed on the driving assembly and located on the side, opposite to the moving direction, of the spraying assembly, and when the spraying mechanism works, the hardening mechanism is automatically driven to work, and paint sprayed by the spraying assembly is rapidly dried; the wall cleaning mechanism is installed on the driving assembly and located on the side, the same as the moving direction, of the spraying assembly, when the hardening mechanism works, the wall cleaning mechanism is automatically driven to work, impurities on the inner wall of the tunnel to be sprayed with paint by the spraying assembly are cleaned up, and the problems that the paint spraying efficiency is low, the hardening speed is low after paint spraying, and the spraying efficiency is poor are solved. And therefore, the tunnel construction progress is influenced.

Description

Technical Field

[0001] The invention relates to the technical field of paint spraying, and in particular to a pneumatic spraying device and method for tunnel inner wall paint. Background Art

[0002] With the development of transportation and logistics, tunnels and their architectural structures can meet the needs of all-weather transportation and logistics, and have outstanding advantages such as safety and concealment, convenient routes, environmental protection and land saving, low carbon and energy saving. During the construction of tunnels, the technology of spraying various coatings on the inner wall of the tunnel plays a very important role in the waterproofing, fire resistance and improving the strength of the tunnel.

[0003] At present, the main method of spraying paint on the inner wall of the tunnel is to spray the paint onto the inner wall of the tunnel manually, and then let the paint harden and adhere to the inner wall of the tunnel by natural air drying. However, this method of spraying is relatively inefficient, and the paint hardens relatively slowly after spraying, thus affecting the construction progress of the entire tunnel. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] Therefore, the purpose of the present invention is to provide a pneumatic spraying device and method for tunnel inner wall paint, which replaces the traditional method of tunnel inner wall paint spraying, avoids the low efficiency of paint spraying and the slow hardening speed of paint after spraying, thereby affecting the progress of tunnel construction.

[0006] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0007] A pneumatic spraying device for tunnel inner wall coating, comprising:

[0008] A spraying mechanism, comprising a spraying assembly for spraying paint on the inner wall of the tunnel during operation and a driving assembly for driving the spraying assembly to move at a constant speed in the tunnel during operation;

[0009] A hardening mechanism, which is mounted on the driving assembly and is located on the side of the spraying assembly opposite to the moving direction, wherein when the spraying mechanism is in operation, the hardening mechanism is automatically driven to work, so as to quickly dry the paint sprayed by the spraying assembly;

[0010] The wall cleaning mechanism is installed on the driving assembly and is located on the side of the spraying assembly that is in the same direction as the moving direction. When the hardening mechanism is working, it automatically drives the wall cleaning mechanism to work to clean up impurities on the inner wall of the tunnel that is about to be sprayed with paint by the spraying assembly.

[0011] As a preferred solution of the pneumatic spraying device for tunnel inner wall coating described in the present invention, the spraying assembly includes an arc frame with connecting grooves on the surface and a spraying member movably mounted on the arc frame.

[0012] As a preferred solution of the pneumatic spraying device for tunnel inner wall coating described in the present invention, one side of the inner wall of the connecting groove has an arc-shaped sawtooth groove and the other side has an arc-shaped limiting sliding groove;

[0013] The spraying part includes a connecting frame, a driving motor located in the connecting frame and having a traveling gear at the output end, an arc-shaped limiting block connected to the outer side wall of the driving motor and extending into the arc-shaped limiting sliding groove, a pneumatic nozzle located at the top of the connecting frame, and a paint box located on the driving assembly and connected to the input end of the pneumatic nozzle through a hose below the side wall, wherein the traveling gear meshes with the saw teeth in the arc-shaped sawtooth groove.

[0014] As a preferred embodiment of the pneumatic spraying device for tunnel inner wall coating described in the present invention, the driving assembly includes a base located at the bottom of both ends of the arc frame, a steering wheel located at one end of the bottom of the base, and a driving wheel located at the other end of the bottom of the base.

[0015] As a preferred solution of the pneumatic spraying device for tunnel inner wall coating described in the present invention, the side wall of the driving wheel is connected to a differential via a rotating shaft, and the other end of the differential is connected to a first pulley via a rotating shaft;

[0016] The hardening mechanism includes heating boxes respectively located on the top of the two bases, a first fan located in the heating box and connected to a first pulley on one side through a rotating shaft, and a first arc-shaped ventilation duct located at the bottom of the two heating boxes and connected to the bottom of the two heating boxes, the second pulley is connected to the first pulley through a belt, a plurality of air outlet holes are evenly opened on the top of the first arc-shaped ventilation duct, and an arc-shaped guide plate is provided on the top of the first arc-shaped ventilation duct.

[0017] As a preferred solution of the pneumatic spraying device for tunnel inner wall coating described in the present invention, the wall cleaning mechanism includes a wall scraping assembly and a dust suction assembly located on the side wall of the wall scraping assembly and transmission-connected to the hardening mechanism.

[0018] As a preferred solution of the pneumatic spraying device for tunnel inner wall coating according to the present invention, the wall scraping assembly comprises a first arc-shaped plate, a plurality of first elastic members located on the outer side wall of the first arc-shaped plate, and a wall scraping plate connected to the other ends of the plurality of first elastic members and located on the outer side of the first arc-shaped plate;

[0019] The dust collection assembly includes a dust collection box located on the top of the two bases and having a second fan inside, a third pulley installed on the side wall of the dust collection box and connected to the side wall of the second fan through a rotating shaft, and a second arc-shaped ventilation duct located on the top of the two dust collection boxes and connected to the top of the two dust collection boxes, the third pulley is connected to the second pulley through a belt, and a plurality of air inlet holes are evenly opened on the top of the second arc-shaped ventilation duct.

[0020] As a preferred embodiment of the pneumatic spraying device for tunnel inner wall paint described in the present invention, a scraper assembly is arranged on one side of the arc frame adjacent to the hardening mechanism, and the scraper assembly includes a second arc plate installed on the side wall of the arc frame, a plurality of second elastic members located on the outer side wall of the second arc plate, and a scraper plate connected to the other end of the second elastic member and located on the outer side of the second arc plate.

[0021] As a preferred solution of the pneumatic spraying device for tunnel inner wall coating described in the present invention, a first material guide groove is provided on a side of the first arc-shaped plate away from the dust suction assembly, and an impurity collection box connected to the first material guide groove and the side wall of the base is provided at the bottom of the first arc-shaped plate;

[0022] A second material guide trough is arranged on one side of the second arc-shaped plate adjacent to the spraying assembly, and a paint collecting box which is connected with the second material guide trough and is located on the top of the base is arranged at the bottom of the second arc-shaped plate.

[0023] A method for pneumatic spraying of tunnel inner wall coating, comprising the pneumatic spraying device for tunnel inner wall coating described above, and the specific steps are as follows:

[0024] S1. Add the paint to be sprayed into the paint box;

[0025] S2. The paint in the paint box is sprayed onto the inner wall of the tunnel through the air pressure nozzle. At the same time, the driving motor is driven to rotate forward and reverse, driving the travel gear to rotate while traveling in the arc-shaped sawtooth groove, thereby driving the air pressure nozzle to move back and forth along the arc-shaped limit slide groove for spraying;

[0026] S3. While the spraying assembly is working, the driving assembly drives the spraying assembly to move forward at a uniform speed in the tunnel, and at this time, the driving wheel rotates to drive the first fan to rotate, and then the hot air in the heating box is blown out through the air outlet at the top of the first arc-shaped ventilation duct, and the paint on the inner wall of the tunnel that has just been sprayed with paint is quickly dried. At the same time, the scraping assembly on the side wall of the arc-shaped frame scrapes the paint that has just been sprayed on the inner wall of the tunnel, making the paint more uniform, and then cooperate with the hardening mechanism to make the paint harden faster;

[0027] S4, the first fan rotates while driving the second fan in the dust box to rotate, thereby moving the entire device to drive the scraper assembly to work and suck away the dust generated when cleaning the inner wall of the tunnel;

[0028] S5. As the entire device moves, the impurities scraped off by the scraper plate are introduced into the impurity collection box through the first material guide trough, and the paint scraped off by the scraper plate is introduced into the paint collection box for recovery by the second material guide trough.

[0029] Compared with the prior art, the present invention has the beneficial effect that the pneumatic spraying device and method for tunnel inner wall paint drives the spraying component to move at a uniform speed in the tunnel through the driving component to spray the paint on the inner wall of the tunnel. At the same time, when the driving component is working, it drives the hardening mechanism to work, so as to dry and quickly harden the inner wall of the tunnel that has just been sprayed with paint, and when the hardening mechanism is working, it drives the wall cleaning mechanism to work, so as to clean the impurities on the inner wall of the tunnel that is about to be sprayed with paint, which is beneficial for the paint to adhere to the inner wall of the tunnel, replacing the traditional method of spraying paint on the inner wall of the tunnel, avoiding the low efficiency of paint spraying and the slow hardening speed of the paint after spraying, thereby affecting the progress of tunnel construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below in combination with the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0031] Figure 1 It is a schematic structural diagram of a pneumatic spraying device for tunnel inner wall coating according to the present invention;

[0032] Figure 2 This is a structural exploded view of a pneumatic spraying device for tunnel inner wall coating according to the present invention;

[0033] Figure 3 This is a disassembled diagram of a spraying mechanism of a pneumatic spraying device for tunnel inner wall coating according to the present invention;

[0034] Figure 4 A side sectional view of a heating box of a pneumatic spraying device for tunnel inner wall coating according to the present invention;

[0035] Figure 5 The present invention is a structural disassembly diagram of a wall cleaning mechanism of a pneumatic spraying device for tunnel inner wall coating.

[0036] In the figure: 100, spraying mechanism; 110, spraying assembly; 110a, arc frame; 110a-1, connecting groove; 110a-11, arc sawtooth groove; 110a-2, scraper assembly; 110a-21, second arc plate; 110a-211, paint collecting box; 110a-22, second elastic member; 110a-23, scraper plate; 110a-231, second guide trough; 110b, spraying member; 110b-1, connecting frame; 110b-2, driving motor; 110b-21, running gear; 110b-3, arc stop block; 110b-4, pneumatic nozzle; 110b-5, paint box; 120, driving assembly; 120a, base; 120 b, steering wheel; 120c, driving wheel; 120c-1, differential; 120c-11, first pulley; 200, hardening mechanism; 210, heating box; 220, first fan; 220a, second pulley; 230, first arc-shaped ventilation duct; 230a, air outlet; 230b, arc-shaped guide plate; 300, wall cleaning mechanism; 310, wall scraping assembly; 310a, first arc-shaped plate; 310a-1, impurity collection box; 310b, first elastic member; 310c, wall scraping plate; 310c-1, first material guide trough; 320, dust collection assembly; 320a, dust collection box; 320b, third pulley; 320c, second arc-shaped ventilation duct; 320c-1, air inlet. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0038] Secondly, the present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0039] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0040] The present invention provides a pneumatic spraying device and method for tunnel inner wall paint to replace the traditional tunnel inner wall paint spraying method, avoiding the problem of low paint spraying efficiency and slow hardening speed of the paint after spraying, which affects the progress of tunnel construction.

[0041] Figure 1-Figure 5 The structure diagram of the pneumatic spraying device for tunnel inner wall coating of the present invention is shown in FIG. Figure 1-Figure 5 A detailed introduction is given to the pneumatic spraying device and method for tunnel inner wall coating.

[0042] Example 1

[0043] refer to Figure 1-Figure 5 The present invention discloses a pneumatic spraying device for tunnel inner wall coating, the main body of which includes a spraying mechanism 100, a hardening mechanism 200 and a wall cleaning mechanism 300.

[0044] refer to Figure 1-Figure 3 The spraying mechanism 100 is used to spray the paint evenly on the inner wall of the tunnel. The spraying mechanism 100 includes a spraying assembly 110 for spraying the paint on the inner wall of the tunnel during operation and a driving assembly 120 for driving the spraying assembly 110 to move at a constant speed in the tunnel during operation. The spraying assembly 110 is used to spray the paint on the inner wall of the tunnel during the spraying operation. The driving assembly 120 is used to drive the spraying assembly 110 to move at a constant speed in the tunnel during operation, thereby spraying the entire tunnel evenly.

[0045] refer to Figure 1-Figure 4 The hardening mechanism 200 is used to dry the paint on the inner wall of the tunnel that has just been sprayed with paint when the driving component 120 drives the spraying component 110 to move and spray. The hardening mechanism 200 is installed on the driving component 120 and is located on the side of the spraying component 110 opposite to the moving direction, so as to facilitate the drying and hardening of the paint on the inner wall of the tunnel that has just been sprayed with paint when it is working. When the spraying mechanism 100 is working, it automatically drives the hardening mechanism 200 to work, and quickly dries the paint sprayed by the spraying component 110;

[0046] refer to Figure 1-Figure 5 The wall cleaning mechanism 300 is used to drive the hardening mechanism 200 to work and clean the position of the inner wall of the tunnel where paint is about to be sprayed when the hardening mechanism 200 is working. The wall cleaning mechanism 300 is installed on the driving component 120 and is located on the side of the spraying component 110 that is in the same direction of movement. It is used to clean the inner wall of the tunnel before spraying paint, so that the paint can better adhere to the inner wall of the tunnel. When the hardening mechanism 200 is working, the wall cleaning mechanism 300 automatically works to clean impurities on the inner wall of the tunnel where paint is about to be sprayed by the spraying component 110.

[0047] In this embodiment, the present invention further discloses a pneumatic spraying method for tunnel inner wall paint, which includes the above pneumatic spraying device for tunnel inner wall paint.

[0048] In this embodiment, the specific usage process is as follows: the paint is sprayed on the inner wall of the tunnel through the spray component 110. At the same time, the driving component 120 drives the spray component 110 to move at a uniform speed, and then the entire tunnel is sprayed. During the operation of the driving component 120, the hardening mechanism 200 is driven to work to dry the paint on the inner wall of the tunnel that has just been sprayed by the spray component 110, so that the paint hardens quickly. During the operation of the hardening mechanism 200, the wall cleaning mechanism 300 is driven to work to clean the inner wall of the tunnel in front of the spray component 110, so as to avoid impurities adhering to the inner wall of the tunnel, which affects the adhesion of the paint to the inner wall of the tunnel, thereby continuously spraying the paint on the inner wall of the tunnel, and the hardening speed is fast, thereby improving the efficiency of tunnel construction.

[0049] Example 2

[0050] Based on Example 1, Figure 3 The spray assembly 110 includes an arc frame 110a with a connection groove 110a-1 on the surface and a spray component 110b movably mounted on the arc frame 110a. The arc frame 110a is used to facilitate the installation of the spray component 110b, and the connection groove 110a-1 is used to connect the spray component 110b.

[0051] In this embodiment, reference Figure 3 , one side of the inner wall of the connecting groove 110a-1 has an arc-shaped sawtooth groove 110a-11 and the other side has an arc-shaped limiting sliding groove, the arc-shaped sawtooth groove 110a-11 is used to mesh with the traveling gear 110b-21, and then when the traveling gear 110b-21 rotates, the entire spraying part 110b moves along the arc-shaped limiting sliding groove, and the arc-shaped limiting sliding groove is used to limit the arc-shaped limiting block 110b-3, so that when the traveling gear 110b-21 rotates in the arc-shaped sawtooth groove 110a-11, the driver moves along the arc-shaped limiting sliding groove;

[0052] refer to Figure 3The spraying part 110b includes a connecting frame 110b-1, a driving motor 110b-2 located in the connecting frame 110b-1 and having a traveling gear 110b-21 at the output end, an arc-shaped limit block 110b-3 connected to the outer wall of the driving motor 110b-2 and extending into the arc-shaped limit slide groove, a pneumatic nozzle 110b-4 located at the top of the connecting frame 110b-1, and a paint box 110b-5 located on the driving assembly 120 and connected to the input end of the pneumatic nozzle 110b-4 through a hose below the side wall. The connecting frame 110b-1 is used to facilitate fixing the driving motor 110b-2, and the driving motor 110b-2 is used to drive the traveling gear 110b-21 to form an arc-shaped sawtooth groove when reciprocating forward and reverse rotation. 110a-11 reciprocates, the traveling gear 110b-21 is used to drive the entire spraying part 110b to move reciprocally along the arc-shaped limiting slide groove when it reciprocates in the arc-shaped sawtooth groove 110a-11, the arc-shaped limiting block 110b-3 is used to limit the driving motor 110b-2, the pneumatic nozzle 110b-4 is used to spray the paint in the paint box 110b-5 onto the inner wall of the tunnel when working, the paint box 110b-5 is used to carry the paint, and the paint box 110b-5 is provided with a stirring mechanism for stirring the paint (not shown in the figure), so as to avoid the paint from settling in the paint box 110b-5, and the traveling gear 110b-21 is meshed with the saw teeth in the arc-shaped sawtooth groove 110a-11.

[0053] In this embodiment, reference Figure 3 The driving assembly 120 includes a base 120a located at the bottom of both ends of the arc frame 110a, a steering wheel 120b located at one end of the bottom of the base 120a, and a driving wheel 120c located at the other end of the bottom of the base 120a. The base 120a is used to support and install the entire device, the steering wheel 120b is used to facilitate the adjustment of the moving direction of the entire device, and the driving wheel 120c is used to rotate during work, thereby driving the entire device to move.

[0054] In this embodiment, the specific working process is as follows: when spraying paint on the inner wall of the tunnel, the pneumatic nozzle 110b-4 starts working to spray the paint in the paint box 110b-5 onto the inner wall of the tunnel. At this time, the driving motor 110b-2 starts working to drive the walking gear 110b-21 to reciprocate along the arc-shaped serrated groove 110a-11, thereby driving the pneumatic nozzle 110b-4 to move back and forth along the arc-shaped limiting groove. At the same time, the driving wheel 120c starts to rotate, and the driving base 120a starts to move at a uniform speed, thereby driving the spraying assembly 110 to move forward at a uniform speed in the tunnel, thereby continuously spraying paint on the inner wall of the tunnel.

[0055] Example 3

[0056] Based on Example 2, Figure 3 The side wall of the driving wheel 120c is connected to a differential 120c-1 through a rotating shaft, which is used to increase the rotation speed of the first pulley 120c-11 when the driving wheel 120c rotates to drive it to rotate. The other end of the differential 120c-1 is connected to the first pulley 120c-11 through a rotating shaft, which is used to drive the second pulley 220a to rotate when rotating;

[0057] refer to Figure 1-Figure 4 The hardening mechanism 200 includes a heating box 210 located at the top of the two bases 120a, a first fan 220 located in the heating box 210 and connected to the first pulley 120c-11 on one side through a rotating shaft, and a first arc-shaped ventilation duct 230 located at the bottom of the two heating boxes 210 and connected to the bottom of the two heating boxes 210. The heating box 210 is used to facilitate the installation of the first fan 220 and the first arc-shaped ventilation duct 230. At the same time, the heating box 210 heats the air entering the interior. The first fan 220 is used to suck the outside air into the heating box 210 when rotating, and then introduce it into the arc-shaped ventilation duct after heating. The second pulley 220a It is used to drive the first fan 220 to rotate when rotating, and the first arc-shaped ventilation duct 230 is used to introduce hot air into a position near the inner wall of the tunnel that has just been sprayed with paint. The second pulley 220a is connected to the first pulley 120c-11 through a belt. A plurality of air outlet holes 230a are evenly arranged on the top of the first arc-shaped ventilation duct 230, which are used to guide the hot air in the first arc-shaped ventilation duct 230. The top of the first arc-shaped ventilation duct 230 is provided with an arc-shaped guide plate 230b, which is used to disperse the hot air blown out of the air outlet hole 230a to prevent the hot air from blowing directly to the inner wall of the tunnel, thereby causing paint to accumulate and causing uneven thickness of the hardened coating.

[0058] In this embodiment, the specific working process is as follows: when the driving wheel 120c is working and rotating, the first pulley 120c-11 is driven to rotate through the differential 120c-1, and then the second pulley 220a is driven to accelerate the rotation and then drive the first fan 220 to rotate. When the first fan 220 rotates, the outside air is sucked into the heating box 210 for heating and then introduced into the first arc-shaped ventilation duct 230. The hot air entering the first arc-shaped ventilation duct 230 is discharged through the air outlet and then dispersed by the arc-shaped guide plate 230b, so that the hot air is evenly blown to the inner wall of the tunnel that has just been sprayed with paint, thereby drying the paint and making it harden quickly.

[0059] Embodiment 4,

[0060] Based on Example 3, Figure 1 and Figure 5The wall cleaning mechanism 300 includes a wall scraping component 310 and a dust suction component 320 located on the side wall of the wall scraping component 310 and connected to the hardening mechanism 200. The wall scraping component 310 is used to scrape the inner wall of the tunnel to be sprayed with paint, so as to clean up impurities attached to the inner wall of the tunnel. The dust suction component 320 is used to suck away the dust generated during the wall scraping process to prevent the dust from adhering to the paint and affecting the quality of the coating.

[0061] In this embodiment, reference Figure 5 The scraper assembly 310 includes a first curved plate 310a, a plurality of first elastic members 310b located on the outer side wall of the first curved plate 310a, and a scraper plate 310c connected to the other end of the plurality of first elastic members 310b and located on the outer side of the first curved plate 310a. The first curved plate 310a is used to facilitate the installation of the scraper plate 310c. The first elastic member 310b is used to make the scraper plate 310c fit more firmly with the inner wall of the tunnel, so that the scraping of the wall is more thorough. The scraper plate 310c is used to scrape off impurities on the inner wall of the tunnel when moving along the inner wall of the tunnel.

[0062] refer to Figure 1 and Figure 5 The dust collection assembly 320 includes a dust collection box 320a located at the top of the two bases 120a and having a second fan therein, a third pulley 320b installed on the side wall of the dust collection box 320a and connected to the side wall of the second fan through a rotating shaft, and a second arc-shaped ventilation duct 320c located on the top of the two dust collection boxes 320a and connected to the top of the two dust collection boxes 320a. The dust collection box 320a is used to facilitate the installation of the second fan, the third pulley 320b and the second arc-shaped ventilation duct 320c, and temporarily collects the impurities such as dust sucked in. The second fan is used to rotate to release the air in the second arc-shaped duct. The air is sucked in from the outer dust suction box 320a, and the third pulley 320b is used to drive the second fan to rotate when it rotates. The second arc-shaped ventilation duct 320c is used to suck in the air near the wall scraping assembly 310. The third pulley 320b is connected to the second pulley 220a through a belt, and is used to drive the third pulley 320b to rotate when the second pulley 220a rotates. A plurality of air inlet holes 320c-1 are evenly arranged on the top of the second arc-shaped ventilation duct 320c, and are used to suck in the air near the wall scraping assembly 310 through the air inlet holes 320c-1 when the second fan rotates, thereby synchronously sucking away the dust in the air.

[0063] In this embodiment, the specific working process is as follows: when the device moves, it drives the scraper plate 310c to move along the inner wall of the tunnel, thereby scraping off impurities attached to the inner wall of the tunnel that is not sprayed with paint. At the same time, when the second pulley 220a rotates, it drives the third pulley 320b to rotate, and then drives the second fan in the dust box 320a to rotate, so that the dust generated during the scraping of the wall is sucked into the dust box 320a through the air inlet hole 320c-1 at the top of the second arc-shaped ventilation duct 320c, and the dust and other impurities in the air are filtered through the dust box 320a, so as to avoid the impurities on the inner wall of the tunnel affecting the adhesion of the paint to the inner wall of the tunnel, and avoid the dust generated during the scraping of the wall combining with the paint to affect the quality of the coating.

[0064] Example 5

[0065] Based on Example 4, Figure 1-Figure 3 A scraper assembly 110a-2 is provided on one side of the arc frame 110a adjacent to the hardening mechanism 200, which is used to scrape the paint sprayed by the spray assembly 110 on the inner wall of the tunnel, so as to cooperate with the hot air blown out by the hardening mechanism 200 to make the paint harden faster and the coating more uniform. The scraper assembly 110a-2 includes a second arc plate 110a-21 installed on the side wall of the arc frame 110a, a plurality of second elastic members 110a-22 located on the outer wall of the second arc plate 110a-21, and a scraper plate 110a-23 connected to the other end of the second elastic member 110a-22 and located on the outer side of the second arc plate 110a-21. The second arc plate 110a-21 is used to facilitate the installation of the scraper plate 110a-23, and the second elastic member 110a-22 is used to make the scraper plate 110a-23 fit more closely with the inner wall of the tunnel, so that the paint is scraped more evenly and flatly.

[0066] In this embodiment, the specific working process is as follows: when the entire device is in the process of moving spraying, as the scraper plate 110a-23 moves, the paint sprayed on the inner wall of the tunnel by the spraying component 110 is scraped flat, so that the paint adheres to the inner wall of the tunnel more evenly, and the hot air blown out by the hardener mechanism makes the paint harden faster, thereby improving the hardening efficiency.

[0067] Example 6

[0068] On the basis of Example 5, in order to prevent the impurities that are not easily sucked away by the dust collection component 320 and scraped off by the scraper plate 310c when moving from accidentally injuring the staff, refer to Figure 5A first guide groove 310c-1 is provided on one side of the first curved plate 310a away from the dust collecting assembly 320, which is used to carry and guide impurities scraped off when the scraper plate 310c moves. An impurity collection box 310a-1 is provided at the bottom of the first curved plate 310a, which is connected to the first guide groove 310c-1 and connected to the side wall of the base 120a, and is used to collect impurities introduced into the first guide groove 310c-1;

[0069] In order to avoid the waste of excess paint scraped by the scraper plate 110a-23 when it moves, refer to Figure 3 A second material guide groove 110a-231 is provided on one side of the second curved plate 110a-21 adjacent to the spray assembly 110, which is used to guide away the paint scraped out when the scraper plate 110a-23 moves. A paint collecting box 110a-211 is provided at the bottom of the second curved plate 110a-21, which is connected to the second material guide groove 110a-231 and located at the top of the base 120a, and is used to collect the paint in the second material guide groove 110a-231 so as to facilitate its reuse.

[0070] A pneumatic spraying method for tunnel inner wall coating, comprising the above pneumatic spraying device for tunnel inner wall coating, and the specific steps are as follows:

[0071] S1, adding the paint to be sprayed into the paint box 110b-5;

[0072] S2, the pneumatic nozzle 110b-4 works to spray the paint in the paint box 110b-5 onto the inner wall of the tunnel. At the same time, the driving motor 110b-2 works forward and reversely, driving the travel gear 110b-21 to rotate while traveling in the arc-shaped sawtooth groove 110a-11, thereby driving the pneumatic nozzle 110b-4 to move back and forth along the arc-shaped limit slide groove for spraying;

[0073] S3. While the spraying assembly 110 is working, the driving assembly 120 drives the spraying assembly 110 to move forward at a uniform speed in the tunnel, and at this time, the driving wheel 120c rotates to drive the first fan 220 to rotate, and then the hot air in the heating box 210 is blown out through the air outlet 230a at the top of the first arc-shaped ventilation duct 230, and the paint on the inner wall of the tunnel that has just been sprayed with paint is quickly dried. At the same time, the scraping assembly 110a-2 on the side wall of the arc frame 110a scrapes the paint that has just been sprayed on the inner wall of the tunnel, making the paint more uniform, and then cooperating with the hardening mechanism 200200 to make the paint harden faster;

[0074] S4, the first fan 220 rotates while driving the second fan in the dust box 320a to rotate, thereby moving the entire device to drive the scraper assembly 310 to work and suck away the dust generated when cleaning the inner wall of the tunnel;

[0075] S5. As the entire device moves, the impurities scraped off by the scraper plate 310c are introduced into the impurity collection box 310a-1 through the first material guide trough 310c-1, and the paint scraped off by the scraper plate 110a-231 is introduced into the paint collection box 110a-211 for recovery.

[0076] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A pneumatic spraying device for tunnel inner wall coating, characterized in that: include: A spraying mechanism (100) comprises a spraying assembly (110) for spraying paint on the inner wall of a tunnel when in operation, and a driving assembly (120) for driving the spraying assembly (110) to move at a constant speed in the tunnel when in operation; a hardening mechanism (200) mounted on the driving assembly (120) and located on a side of the spraying assembly (110) opposite to the moving direction, wherein when the spraying mechanism (100) is in operation, the hardening mechanism (200) is automatically driven to operate, so as to quickly dry the paint sprayed by the spraying assembly (110); A wall cleaning mechanism (300) is installed on the driving assembly (120) and is located on the side of the spraying assembly (110) that is in the same direction as the moving direction, wherein when the hardening mechanism (200) is in operation, it automatically drives the wall cleaning mechanism (300) to operate, thereby cleaning impurities on the inner wall of the tunnel to be sprayed with paint by the spraying assembly (110).

2. The pneumatic spraying device for tunnel inner wall coating according to claim 1, characterized in that: The spraying assembly (110) comprises an arc-shaped frame (110a) with a connection groove (110a-1) formed on the surface thereof, and a spraying member (110b) movably mounted on the arc-shaped frame (110a).

3. The pneumatic spraying device for tunnel inner wall coating according to claim 2, characterized in that: The inner wall of the connecting groove (110a-1) has an arc-shaped sawtooth groove (110a-11) on one side and an arc-shaped limiting sliding groove on the other side; The spraying member (110b) comprises a connection frame (110b-1), a driving motor (110b-2) located in the connection frame (110b-1) and having a travel gear (110b-21) at the output end, an arc-shaped limit block (110b-3) connected to the outer side wall of the driving motor (110b-2) and extending into the arc-shaped limit sliding groove, a pneumatic spray head (110b-4) located at the top of the connection frame (110b-1), and a paint box (110b-5) located on the driving assembly (120) and connected to the input end of the pneumatic spray head (110b-4) through a hose below the side wall, wherein the travel gear (110b-21) meshes with the saw teeth in the arc-shaped sawtooth groove (110a-11).

4. The pneumatic spraying device for tunnel inner wall coating according to claim 2, characterized in that: The driving assembly (120) comprises a base (120a) located at the bottom of both ends of the arc frame (110a), a steering wheel (120b) located at one end of the bottom of the base (120a), and a driving wheel (120c) located at the other end of the bottom of the base (120a).

5. The pneumatic spraying device for tunnel inner wall coating according to claim 4, characterized in that: The side wall of the driving wheel (120c) is connected to a differential (120c-1) via a rotating shaft, and the other end of the differential (120c-1) is connected to a first pulley (120c-11) via a rotating shaft; The hardening mechanism (200) comprises a heating box (210) respectively located at the top of the two bases (120a), a first fan (220) located in the heating box (210) and connected to a first pulley (120c-11) on one side via a rotating shaft, and a first arc-shaped ventilation duct (230) located at the bottom of the two heating boxes (210) and connected to the bottom of the two heating boxes (210), the second pulley (220a) being connected to the first pulley (120c-11) via a belt, a plurality of air outlet holes (230a) being evenly arranged at the top of the first arc-shaped ventilation duct (230), and an arc-shaped guide plate (230b) being provided at the top of the first arc-shaped ventilation duct (230).

6. The pneumatic spraying device for tunnel inner wall coating according to claim 5, characterized in that: The wall cleaning mechanism (300) comprises a wall scraping assembly (310) and a dust collecting assembly (320) located on the side wall of the wall scraping assembly (310) and drivingly connected to the hardening mechanism (200).

7. The pneumatic spraying device for tunnel inner wall coating according to claim 6, characterized in that: The wall scraping assembly (310) comprises a first arc-shaped plate (310a), a plurality of first elastic members (310b) located on the outer side wall of the first arc-shaped plate (310a), and a wall scraping plate (310c) connected to the other ends of the plurality of first elastic members (310b) and located on the outer side of the first arc-shaped plate (310a); The dust collection assembly (320) comprises a dust collection box (320a) respectively located on the top of the two bases (120a) and having a second fan inside, a third pulley (320b) installed on the side wall of the dust collection box (320a) and connected to the side wall of the second fan through a rotating shaft, and a second arc-shaped ventilation duct (320c) located on the top of the two dust collection boxes (320a) and connected to the top of the two dust collection boxes (320a), the third pulley (320b) is connected to the second pulley (220a) through a belt, and a plurality of air inlet holes (320c-1) are evenly opened on the top of the second arc-shaped ventilation duct (320c).

8. The pneumatic spraying device for tunnel inner wall coating according to claim 7, characterized in that: A scraper assembly (110a-2) is arranged on one side of the arc frame (110a) adjacent to the hardening mechanism (200), and the scraper assembly (110a-2) comprises a second arc plate (110a-21) installed on the side wall of the arc frame (110a), a plurality of second elastic members (110a-22) located on the outer side wall of the second arc plate (110a-21), and a scraper plate (110a-23) connected to the other end of the second elastic member (110a-22) and located on the outer side of the second arc plate (110a-21).

9. The pneumatic spraying device for tunnel inner wall coating according to claim 8, characterized in that: A first material guide groove (310c-1) is provided on a side of the first arc-shaped plate (310a) away from the dust collecting assembly (320), and an impurity collection box (310a-1) is provided at the bottom of the first arc-shaped plate (310a) and is communicated with the first material guide groove (310c-1) and connected to the side wall of the base (120a); A second material guide trough (110a-231) is provided on one side of the second curved plate (110a-21) adjacent to the spray assembly (110), and a paint collection box (110a-211) is provided at the bottom of the second curved plate (110a-21) and is connected to the second material guide trough (110a-231) and is located on the top of the base (120a).

10. A pneumatic spraying method for tunnel inner wall coating, comprising the pneumatic spraying device for tunnel inner wall coating according to claims 1 to 9, and the specific steps are as follows: S1, adding the paint to be sprayed into the paint box (110b-5); S2, the paint in the paint box (110b-5) is sprayed onto the inner wall of the tunnel by the air pressure spray head (110b-4), and at the same time, the driving motor (110b-2) is driven to rotate forward and reverse, driving the travel gear (110b-21) to rotate while traveling in the arc-shaped sawtooth groove (110a-11), thereby driving the air pressure spray head (110b-4) to move back and forth along the arc-shaped limit sliding groove for spraying; S3, while the spraying assembly (110) is working, the driving assembly (120) drives the spraying assembly (110) to move forward at a uniform speed in the tunnel, and at this time, the driving wheel (120c) rotates to drive the first fan (220) to rotate, thereby blowing the hot air in the heating box (210) out through the air outlet (230a) at the top of the first arc-shaped ventilation duct (230), and quickly drying the paint on the inner wall of the tunnel that has just been sprayed with paint. At the same time, the scraping assembly (110a-2) on the side wall of the arc-shaped frame (110a) scrapes the paint that has just been sprayed on the inner wall of the tunnel, making the paint more uniform, and then cooperating with the hardening mechanism (200) to make the paint harden faster; S4, the first fan (220) rotates while driving the second fan in the dust collection box (320a) to rotate, thereby moving the entire device to drive the wall scraping assembly (310) to work and suck away the dust generated when cleaning the inner wall of the tunnel; S5. As the entire device moves, the impurities scraped off by the scraper plate (310c) are introduced into the impurity collection box (310a-1) through the first material guide trough (310c-1), and the paint scraped off by the scraper plate (110a-231) is introduced into the paint collection box (110a-211) for recovery.

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