Steel lining plastic storage tank inner wall spraying equipment capable of achieving uniform spraying

Abstract

The utility model discloses steel lining plastic storage tank inner wall spraying equipment capable of spraying evenly, and relates to the technical field of spraying equipment, the steel lining plastic storage tank inner wall spraying equipment comprises a shell and a rotating shaft fixedly connected to the center of the top of the shell, the rotating shaft is of a hollow structure and is arranged in the axial direction of the rotating shaft in a penetrating mode, and a first storage groove is formed in the shell; the two ends, in the length direction of the shell, of the first storage groove penetrate through the shell, and a driving mechanism is arranged in the shell and located in the center of the inner wall of the bottom of the first storage groove. According to the spraying device, the sliding plates on the two sides of the shell are driven by the driving mechanism to slide out or retract so as to change the distance between the spraying heads on the two sides and the inner wall of the steel lining plastic storage tank, then the spraying distance suitable for the steel lining plastic storage tank to be sprayed currently can be found conveniently, the situation that the spraying effect is affected due to the fact that the spraying distance is too long or too short during spraying is avoided, spraying uniformity is guaranteed, and the spraying efficiency is improved. And meanwhile, the spraying heads on the two sides can be independently subjected to angle adjustment, the spraying device can adapt to spraying operation of irregular inner walls to a certain degree, and the spraying efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of spraying equipment, in particular to an inner wall spraying equipment for a steel-lined plastic storage tank with uniform spraying. Background Technique

[0002] The steel-lined plastic storage tank is a kind of steel-plastic composite series product. It adopts a special rotational molding process to weld the steel mesh on the surface of the steel body, and then uses pure polyethylene (such as linear low-density polyethylene LLDPE, high-density polyethylene HDPE) as the raw material. Through the rotational molding process, the steel plate, steel mesh (turtle shell) and polyethylene are organically combined into one. This kind of storage tank combines the physical properties of the high-molecular polyethylene storage tank and the rigid strength of the steel tank, so it is widely used in many industries such as chemical industry, dye, medicine, pesticide, metallurgy, rare earth, machinery, electric power, electronics, environmental protection, textile, brewing, food, water supply and drainage.

[0003] By spraying the inner wall, a uniformly thick and thin isolation film can be formed on the inner wall of the storage tank. This film can effectively prevent the corrosion of the inner wall of the storage tank by the medium, thereby extending the service life of the storage tank. Especially for the storage tank that needs to contain corrosive media, the inner wall spraying is particularly important. When spraying the steel-lined plastic storage tank with different cross-sectional radii, especially some steel-lined plastic storage tanks with larger cross-sectional radii, during some machine spraying, since its nozzle cannot be adjusted according to the steel-lined plastic storage tank with different cross-sectional radii, the distance from the inner wall is relatively far, resulting in more paint scattering. And because the paint mist particles run in the air for too long, more diluent volatilizes, resulting in a larger contact area between the paint and the surface of the workpiece to be sprayed, and the local spraying thickness becomes thinner. This not only affects the protective performance of the coating, but also affects the uniformity of the coating.

[0004] In view of this, this application is specifically proposed. Content of the Utility Model

[0005] The purpose of the utility model is to provide an inner wall spraying equipment for a steel-lined plastic storage tank with uniform spraying, so as to solve the problems put forward in the above background technique.

[0006] To solve the above technical problems, a spraying device for the inner wall of a steel-lined plastic storage tank with uniform spraying provided by the utility model includes a housing and a rotating shaft fixedly connected to the center of the top of the housing. The rotating shaft is of a hollow structure and runs through along its axial direction. There is a storage slot one in the housing, and both ends of the storage slot one in the length direction of the housing run through the housing. A driving mechanism is provided in the housing, and the driving mechanism is located at the center of the bottom inner wall of the storage slot one. The longitudinal section of the storage slot one is concave-shaped, and both ends of the storage slot one are slidably connected with sliding plates. Both of the sliding plates are connected to the driving mechanism. One end of each of the two sliding plates away from each other is fixedly connected with a fixing plate. In the middle of the end of the top of the fixing plate away from the sliding plate, there is a vertically penetrating channel one, and a spray head is arranged in the channel one. An inlet pipe is coaxially arranged inside the rotating shaft, and the inlet pipe is rotatably connected with the housing.

[0007] Furthermore, a vertical groove one is provided at the center of the top of the housing. The groove one is coaxially arranged with the inlet pipe. A horizontal channel two is provided at the end of the groove one away from the inlet pipe. The channel two communicates with both the groove one and the inlet pipe. At the center of the side wall of each of the two sliding plates close to each other, there is a horizontally and transversely penetrating channel three. The channel three is coaxially arranged with the channel two and communicates with each other. Inside the mutually close ends of the channel two and the channel three on the same side, there is the same conduit.

[0008] Furthermore, one end of the conduit close to the sliding plate is located in the channel three, and the conduit is fixedly connected with the sliding plate. The other end of the conduit away from the sliding plate is slidably connected in the channel two. A limiting ring one is fixedly connected to the inner arc wall of the end of the channel two close to the sliding plate. The other end of the conduit away from the sliding plate is slidably connected in the limiting ring one. A limiting ring two is fixedly connected to the side wall of the conduit away from the sliding plate. The limiting ring one and the limiting ring two have the same structure and the limiting ring two is farther away from the sliding plate than the limiting ring one.

[0009] Furthermore, the driving mechanism includes a motor two fixedly connected to the bottom inner wall of the storage slot one. The output end of the motor two is fixedly connected with a worm. A worm gear is meshed and connected to one side of the worm. The worm gear is coaxially arranged with the rotating shaft. A gear one is fixedly connected to the top of the worm gear. Both sides of the gear one are meshed and connected with horizontally arranged rack plates. The two rack plates are respectively fixedly connected with the two sliding plates. The rack plates are slidably connected to the top inner wall of the storage slot one.

[0010] Furthermore, a horizontally and transversely penetrating channel four is opened at the center of the side wall of the fixing plate close to the sliding plate. The channel four is coaxially arranged with the channel three and communicates with each other. The cross-section of the fixing plate is concave-shaped and the concave opening faces away from the sliding plate. On both sides of the channel one close to each other, at the end away from the sliding plate, there are horizontally arranged fixing frames one fixedly connected. On the side walls of the two fixing frames one close to each other, at the end away from the sliding plate, there is the same spray head rotatably connected. The output port of the spray head faces away from the sliding plate. A motor one is installed on one side wall of the fixing plate.

[0011] Further, one side wall of the spray head close to the fixed plate is fixedly connected with a telescopic hose. One end of the telescopic hose far from the spray head is fixedly connected to the opening of the fourth channel on the fixed plate. The spray head, the telescopic hose and the fourth channel are mutually communicated. On both the top and bottom of the outer arc wall of the spray head close to the fixed plate, there are fixedly connected second fixing frames. The second fixing frame includes a limiting plate fixedly connected to the outer arc wall of the spray head. In the middle of one end of the top of the limiting plate close to the fixed plate, there is fixedly connected an L-shaped plate. The L-shaped plate is inclined towards the telescopic hose and the end of the L-shaped plate far from the limiting plate is arranged towards the telescopic hose. On both sides of the end of the L-shaped plate far from the limiting plate, there are rotatably connected rollers. The output end of the first motor is provided with a transmission mechanism, and one end of the transmission mechanism far from the first motor is installed on the spray head.

[0012] Further, on both the top ends of the inner sides of the shell, there are provided second storage grooves. The second storage grooves are mutually communicated with the rotating shaft but not with the feed pipe. On one side wall of the second storage groove close to the sliding plate, there is opened a horizontally transverse fifth channel. A wiring pipe is slidably connected in the fifth channel.

[0013] Further, the wiring pipe is of a hollow structure and made of a flexible material. One end of the wiring pipe located in the second storage groove is fixedly connected with a vertical winding roller. The winding roller is rotatably connected to the bottom inner wall of the second storage groove. One end of the wiring pipe close to the fixed plate penetrates through the fixed plate and is electrically connected to the first motor. The wiring pipe is fixedly connected at the position where it penetrates through the fixed plate. A torsion spring is provided at the connection of the winding roller and the second storage groove.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. By driving the sliding plates on both sides of the shell to slide out or retract through the driving mechanism, the distance between the spray heads on both sides and the inner wall of the steel-lined plastic storage tank is changed, so as to facilitate finding the spraying distance suitable for the currently sprayed steel-lined plastic storage tank, thereby avoiding the influence on the spraying effect caused by too far or too close distance during spraying, ensuring the uniformity of spraying. At the same time, the spray heads on both sides can be individually adjusted in angle and can adapt to the spraying operation on the irregular inner wall to a certain extent, improving the spraying efficiency.

[0016] 2. Through the second fixing frames and rollers on both sides of the spray head, during the angle adjustment of the spray head, the deformation and bending of the telescopic hose are assisted, preventing the hose from being overly bent and unable to recover during the angle adjustment, which may affect the spraying rate of the paint due to the obstruction of the overly bent hose during the transmission of the paint, further ensuring the uniformity of spraying. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram after the expansion of the inner wall spraying device for a steel-lined plastic storage tank with uniform spraying;

[0018] Figure 2 ForFigure 1 Enlarged view of the structure at position A;

[0019] Figure 3 Schematic diagram of the internal structure of the housing in a spraying device for the inner wall of a steel-lined plastic storage tank with uniform spraying;

[0020] Figure 4 is Figure 3 Enlarged view of the structure at position B;

[0021] Figure 5 Schematic diagram of the structure of a spraying device for the inner wall of a steel-lined plastic storage tank with uniform spraying after being retracted.

[0022] In the figure:

[0023] 10. Housing; 11. Rotating shaft; 12. Feed pipe; 13. Sprayer; 14. Telescopic hose; 15. Slide plate; 16. Wiring pipe; 17. Fixed plate;

[0024] 20. Driving mechanism; 21. Worm; 22. Worm gear; 23. Rack plate; 24. First gear;

[0025] 25. Conduit;

[0026] 30. First fixing bracket; 31. Second fixing bracket; 32. Roller. Detailed implementation mode

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] Please refer to Figures 1-5 , the present invention provides a technical solution: including a housing 10 and a rotating shaft 11 fixedly connected to the center of the top of the housing 10. The rotating shaft 11 is of a hollow structure and is axially penetrated along its axis. A first storage groove is provided in the housing 10, and both ends of the first storage groove in the length direction of the housing 10 penetrate through the housing 10. A driving mechanism 20 is provided in the housing 10, and the driving mechanism 20 is located at the center of the inner wall of the bottom of the first storage groove. The longitudinal section of the first storage groove is concave-shaped, and slide plates 15 are slidably connected to both ends of the first storage groove. Both of the slide plates 15 are connected to the driving mechanism 20. Fixing plates 17 are fixedly connected to the mutually remote ends of both of the slide plates 15. A vertically penetrating first channel is provided in the middle of the end of the fixing plate 17 away from the slide plate 15, and a sprayer 13 is provided in the first channel. A feed pipe 12 is coaxially provided inside the rotating shaft 11, and the feed pipe 12 is rotationally connected to the housing 10;

[0029] At the center of the top of the housing 10, there is a vertical groove 1. The groove 1 is coaxially arranged with the feed pipe 12. At one end of the groove 1 away from the feed pipe 12, there is a horizontal channel 2. The channel 2 communicates with the groove 1 and the feed pipe 12. At the center of the side walls of the two sliding plates 15 close to each other, there are horizontally and transversely penetrating channels 3. The channel 3 is coaxially arranged with and communicates with the channel 2. In the ends of the channel 2 and the channel 3 on the same side close to each other, there is the same conduit 25.

[0030] One end of the conduit 25 close to the sliding plate 15 is located in the channel 3, and the conduit 25 is fixedly connected to the sliding plate 15. The end of the conduit 25 away from the sliding plate 15 is slidably connected in the channel 2. A limiting ring 1 is fixedly connected to the inner arc wall of the channel 2 close to the sliding plate 15. The end of the conduit 25 away from the sliding plate 15 is slidably connected in the limiting ring 1. A limiting ring 2 is fixedly connected to the side wall of the conduit 25 away from the sliding plate 15. The limiting ring 1 and the limiting ring 2 have the same structure and the limiting ring 2 is farther from the sliding plate 15 than the limiting ring 1.

[0031] It should be noted that: the connection between the feed pipe 12 and the groove 1 on the housing 10 uses a sealing bearing 1. A sealing bearing 2 is installed on the outer arc wall of the end of the feed pipe 12 away from the rotating shaft 11. The inner arc wall of the rotating shaft 11 is fixedly connected to the outer arc wall of the sealing bearing 2. One end of the rotating shaft 11 away from the housing 10 is connected with a transmission device to rotate the rotating shaft 11. At the same time, the transmission device should avoid the feed pipe 12. That is, a driving part can be arranged on the outer arc wall of the end of the rotating shaft 11 away from the housing 10, and then a driving device that is not coaxial with the rotating shaft 11 and does not contact the feed pipe 12 is set to drive the driving part to operate. In a possible embodiment, a gear 2 is fixedly connected to the outer arc wall of the end of the rotating shaft 11 away from the housing 10. A motor 3 is meshed and connected to one side of the gear 2. The motor 3 does not contact the feed pipe 12. For stability, the above structure can be fixedly connected to the same other structure as this equipment. In addition, a through hole penetrating axially can be opened on the inner ring of the sealing bearing 2 for wiring.

[0032] The sliding plate 15 is slidably connected in the storage groove 1. A blocking ring 1 is arranged on the inner wall of the opening of the storage groove 1. The cross-sectional shape of the blocking ring is adapted to that of the sliding plate 15. The sliding plate 15 is slidably connected in the blocking ring 1. On the outer walls of the sliding plate 15 close to each other, there are blocking rings 2 with the same structure. The distance from the limiting ring 1 to the limiting ring 2 is equal to the distance from the blocking ring 1 to the blocking ring 2. That is, the distance that the sliding plate 15 can slide out of the housing 10 is equal to the above two distances.

[0033] When the fixed plate 17 abuts against the housing 10, this is the shortest spraying distance at this time, and the sliding plate 15 abuts against an inner wall of the placement groove. The second limiting rings on the sides where the two conduits 25 are close to each other are both located on both sides of the first groove. On the contrary, when the first blocking ring abuts against the second blocking ring, the sliding plate 15 reaches the maximum extendable length at this time, and the first limiting ring abuts against the second limiting ring at this time. To ensure airtightness, a piston is fixedly connected to the side of the second limiting ring close to the first limiting ring. The piston is slidably connected in the first channel and sleeved on the outer arc wall of the conduit 25.

[0034] Please refer to Figures 1-5 , the present utility model provides a technical solution: The driving mechanism 20 includes a second motor fixedly connected to the inner wall of the bottom of the first placement groove. The output end of the second motor is fixedly connected with a worm 21. A worm gear 22 is meshed and connected to one side of the worm 21. The worm gear 22 is coaxially arranged with the rotating shaft 11. A first gear 24 is fixedly connected to the top of the worm gear 22. Horizontal rack plates 23 are meshed and connected to both sides of the first gear 24. The two rack plates 23 are respectively fixedly connected to the two sliding plates 15. The rack plates 23 are slidably connected to the inner wall of the top of the first placement groove.

[0035] It should be noted that: The second motor drives the driving mechanism 20 so that the two sliding plates 15 can extend simultaneously, and it will not loosen easily due to the self-locking effect of the worm 21 and the worm gear 22.

[0036] Please refer to Figures 1-5 , the present utility model provides a technical solution: A horizontally horizontally penetrating fourth channel is opened at the center of the side wall of the fixed plate 17 close to the sliding plate 15. The fourth channel is coaxially arranged with and communicates with the third channel. The cross-section of the fixed plate 17 is concave-shaped and the concave opening faces away from the sliding plate 15. Fixed frames 30 are fixedly connected to the ends of the two side walls of the first channel far from the sliding plate 15 and close to each other. A same spray head 13 is rotatably connected to the ends of the side walls of the two fixed frames 30 close to each other and far from the sliding plate 15. The output port of the spray head 13 faces away from the sliding plate 15. A first motor is installed on one side wall of the fixed plate 17;

[0037] On one side wall of the spray head 13 close to the fixed plate 17, a telescopic hose 14 is fixedly connected. One end of the telescopic hose 14 far from the spray head 13 is fixedly connected to the opening of the fourth channel on the fixed plate 17, and the spray head 13, the telescopic hose 14 and the fourth channel are mutually communicated. On both the top and bottom of the outer arc wall of the spray head 13 close to the fixed plate 17, a second fixing frame 31 is fixedly connected. The second fixing frame 31 includes a limiting plate fixedly connected to the outer arc wall of the spray head 13. In the middle of one end of the top of the limiting plate close to the fixed plate 17, an L-shaped plate is fixedly connected. The L-shaped plate is inclined towards the telescopic hose 14 and the end of the L-shaped plate far from the limiting plate is arranged towards the telescopic hose 14. On both sides of the end of the L-shaped plate far from the limiting plate, rollers 32 are rotatably connected. The output end of the first motor is provided with a transmission mechanism, and one end of the transmission mechanism far from the first motor is installed on the spray head 13.

[0038] It should be noted that: the telescopic hose 14 is a telescopic and bendable corrugated pipe. When the spray head 13 needs to spray dead corners such as the bottom or top of the tank and areas that are difficult to spray, after the spray head 13 adjusts its angle, the telescopic hose 14 can adapt to large-scale bending and stretching;

[0039] In a possible embodiment, a fourth storage groove is provided inside the fixed plate 17 and the fourth storage groove does not contact the first channel. The transmission mechanism is a first sprocket fixedly connected to the output end of the first motor. The first sprocket is located in the third storage groove. The first fixing frame 30 is of a hollow structure. One end of the first fixing frame 30 close to the sliding plate 15 communicates with the fourth storage groove. On the side walls of the two first fixing frames 30 close to each other, a roller shaft is rotatably connected. The spray head 13 is fixedly connected to the outer arc wall of the roller shaft. One end of the roller shaft penetrates through one of the first fixing frames 30. A first sprocket with the same structure is fixedly connected to the side wall of the roller shaft penetrating through the first fixing frame 30. The two first sprockets are located in the same vertical plane, and the same chain is meshed and connected to the outside of the two first sprockets.

[0040] Please refer to Figures 1-5 , the present utility model provides a technical solution: on both top ends of the inner sides of the housing 10, second storage grooves are provided. The second storage grooves communicate with the rotating shaft 11 but do not communicate with the feed pipe 12. On the side wall of the second storage groove close to the sliding plate 15, a horizontally transverse fifth channel is opened. A wiring pipe 16 is slidably connected in the fifth channel;

[0041] The wiring pipe 16 is of a hollow structure and is made of a flexible material. One end of the wiring pipe 16 located in the second storage groove is fixedly connected with a vertical winding roller. The winding roller is rotatably connected to the bottom inner wall of the second storage groove. One end of the wiring pipe 16 close to the fixed plate 17 penetrates through the fixed plate 17 and is electrically connected to the first motor. The wiring pipe 16 is fixedly connected at the position where it penetrates through the fixed plate 17. A torsion spring is provided at the connection between the winding roller and the second storage groove.

[0042] It should be noted that: The wiring pipe 16 facilitates laying lines for the first motor and the second motor, so as to prevent the original lines from being pulled and broken when the slide plate 15 extends. The cable is led out from the control device externally connected to the equipment and comes into the third storage groove through the gap between the rotating shaft 11 and the feed pipe 12, and the outer arc wall of the cable is fixedly connected to the winding roller;

[0043] Since the equipment needs to move into the tank during spraying operations, the cable located between the rotating shaft 11 and the feed pipe 12 can adapt to the follow-up of the cable during penetration by reserving a longer distance. However, to prevent the wiring connection of the first motor from loosening due to the tension generated by the slide plate 15 during sliding, a certain length is also reserved for this part of the cable located within the housing 10;

[0044] Specifically, first fix one end on the winding roller, and then fixedly connect the input end for connecting the first motor to the place passing through the fixing plate 17, that is, at the position passing through the fourth storage groove. In this way, when the slide plate 15 slides out, the position passing through the fourth chute will generate a pulling force on the cable, thereby pulling out the cable on the winding roller. At the same time, the torsion spring stores energy. On the contrary, when the slide plate 15 slides into the housing 10, the torsion spring releases the stored energy to rewind the cable. During this period, the connection will not be pulled, thus avoiding the problem of connection loosening.

[0045] Working principle:

[0046] The rotating shaft 11 is used to drive the housing 10 and its components to rotate as a whole. The feed pipe 12 is used to supply paint to the spray head 13. The gap between the rotating shaft 11 and the feed pipe 12 is used to route wires for the first motor and the second motor within the housing 10. The drive mechanism 20 is used to drive the slide plate 15 and thus drive the fixing plate 17 to slide out away from the housing 10 to change the spraying distance. During this period, the conduit 25 is used to ensure the continuity of the paint delivery pipeline when it extends. The wiring pipe 16 and the components within the second storage groove are used to ensure that the cable is retracted and extended accordingly as it expands and contracts. The first motor can independently drive one of the spray heads 13 to adjust the angle in the axial direction parallel to the rotating shaft 11 to cope with the spraying of irregular inner walls or the inner walls of the tank bottom and tank top.

Claims

1. An inner wall spraying device for a steel-lined plastic storage tank with uniform spraying, comprising a housing (10) and a rotating shaft (11) fixedly connected to the center of the top of the housing (10). The rotating shaft (11) is of a hollow structure and runs through along its axial direction. There is a first storage groove in the housing (10), and both ends of the first storage groove along the length direction of the housing (10) run through the housing (10). It is characterized in that: A driving mechanism (20) is provided inside the housing (10). The driving mechanism (20) is located at the center of the inner wall of the bottom of the first storage groove. The longitudinal section of the first storage groove is concave-shaped. Sliding plates (15) are slidably connected to both ends of the first storage groove. Both of the sliding plates (15) are connected to the driving mechanism (20). Fixing plates (17) are fixedly connected to the ends of both of the sliding plates (15) away from each other. In the middle of the end of the top of the fixing plate (17) away from the sliding plate (15), there is a vertically penetrating first channel. A spray head (13) is provided inside the first channel. An inlet pipe (12) is coaxially provided inside the rotating shaft (11). The inlet pipe (12) is rotationally connected to the housing (10).

2. The inner wall spraying device for a steel-lined plastic storage tank with uniform spraying as described in claim 1, characterized in that: At the center of the top of the housing (10), there is a vertical first groove. The first groove is coaxially arranged with the inlet pipe (12). At the end of the first groove away from the inlet pipe (12), there is a horizontal second channel. The second channel communicates with both the first groove and the inlet pipe (12). Horizontally and transversely penetrating third channels are provided at the centers of the side walls of both of the sliding plates (15) close to each other. The third channels are coaxially arranged with and communicate with the second channel. Inside the ends of the second channel and the third channel on the same side close to each other, there is the same conduit (25).

3. The inner wall spraying device for a steel-lined plastic storage tank with uniform spraying as described in claim 2, characterized in that: One end of the conduit (25) close to the sliding plate (15) is located inside the third channel, and the conduit (25) is fixedly connected to the sliding plate (15). The end of the conduit (25) away from the sliding plate (15) is slidably connected inside the second channel. A first limiting ring is fixedly connected to the inner arc wall of the end of the second channel close to the sliding plate (15). The end of the conduit (25) away from the sliding plate (15) is slidably connected inside the first limiting ring. A second limiting ring is fixedly connected to the side wall of the conduit (25) away from the sliding plate (15). The first limiting ring and the second limiting ring have the same structure, and the second limiting ring is farther away from the sliding plate (15) than the first limiting ring.

4. The inner wall spraying device for a steel-lined plastic storage tank with uniform spraying as described in claim 1, characterized in that: The driving mechanism (20) includes a second motor fixedly connected to the inner wall of the bottom of the first storage groove. A worm (21) is fixedly connected to the output end of the second motor. A worm gear (22) is meshed and connected to one side of the worm (21). The worm gear (22) is coaxially arranged with the rotating shaft (11). A first gear (24) is fixedly connected to the top of the worm gear (22). Horizontally arranged rack plates (23) are meshed and connected to both sides of the first gear (24). Both of the rack plates (23) are fixedly connected to both of the sliding plates (15). The rack plates (23) are slidably connected to the inner wall of the top of the first storage groove.

5. The inner wall spraying device for a steel-lined plastic storage tank with uniform spraying as described in claim 1, wherein: A horizontally and transversely penetrating fourth channel is opened at the center of the side wall of the fixing plate (17) close to the sliding plate (15). The fourth channel is coaxially arranged with and communicates with the third channel. The cross-section of the fixing plate (17) is concave-shaped and the concave opening faces away from the sliding plate (15). Horizontally arranged first fixing frames (30) are fixedly connected to the ends of both side walls of the first channel away from the sliding plate (15). A same spray head (13) is rotatably connected to the ends of both side walls of both of the first fixing frames (30) close to each other away from the sliding plate (15). The output port of the spray head (13) faces away from the sliding plate (15). A first motor is installed on one side wall of the fixing plate (17).

6. The inner wall spraying device for a steel-lined plastic storage tank with uniform spraying as described in claim 5, wherein: On one side wall of the spray head (13) close to the fixed plate (17), a telescopic hose (14) is fixedly connected. One end of the telescopic hose (14) far from the spray head (13) is fixedly connected to the opening of the fourth channel on the fixed plate (17), and the spray head (13), the telescopic hose (14) and the fourth channel are mutually communicated. On both the top and bottom of the outer arc wall of the spray head (13) close to the fixed plate (17), a second fixing bracket (31) is fixedly connected. The second fixing bracket (31) includes a limiting plate fixedly connected to the outer arc wall of the spray head (13). In the middle of one end of the top of the limiting plate close to the fixed plate (17), an L-shaped plate is fixedly connected. The L-shaped plate is inclined towards the telescopic hose (14) and the end of the L-shaped plate far from the limiting plate is arranged towards the telescopic hose (14). On both sides of the end of the L-shaped plate far from the limiting plate, rollers (32) are rotatably connected. The output end of the first motor is provided with a transmission mechanism, and one end of the transmission mechanism far from the first motor is installed on the spray head (13).

7. The inner wall spraying device for a steel-lined plastic storage tank with uniform spraying as described in claim 1, characterized in that: On both the top ends of the two sides inside the housing (10), a second storage groove is provided. The second storage groove communicates with the rotating shaft (11) but does not communicate with the feed pipe (12). On one side wall of the second storage groove close to the sliding plate (15), a horizontally transverse fifth channel is opened, and a wiring pipe (16) is slidably connected in the fifth channel.

8. The inner wall spraying device for a steel-lined plastic storage tank with uniform spraying as described in claim 7, characterized in that: The wiring pipe (16) has a hollow structure and is made of a flexible material. One end of the wiring pipe (16) located in the second storage groove is fixedly connected with a vertical winding roller, and the winding roller is rotatably connected to the bottom inner wall of the second storage groove. One end of the wiring pipe (16) close to the fixed plate (17) penetrates through the fixed plate (17) and is electrically connected to the first motor. The wiring pipe (16) is fixedly connected at the position where it penetrates through the fixed plate (17), and a torsion spring is provided at the connection between the winding roller and the second storage groove.

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