Pipeline inner wall spraying machine capable of achieving uniform spraying

Abstract

The invention relates to the technical field of pipeline inner wall spraying, in particular to a pipeline inner wall spraying machine capable of achieving uniform spraying, which comprises a spraying machine main body, a second guide wheel part, an inclined assembly, a deflection assembly and a follow-up unlocking assembly, the second guide wheel piece is arranged outside the connecting cylinder, the second guide wheel piece and the first guide wheel piece are arranged in a staggered mode, the second guide wheel piece is composed of a supporting part, an inclined part and a guide wheel, and the inclined assembly is used for driving the inclined part to incline after the second guide wheel piece moves out of the to-be-painted pipeline; after the spraying machine moves until the guide wheel of the second guide wheel part is separated from the inner wall of the pipeline, the inclination assembly is started to incline the inclination part, and meanwhile, the deflection assembly deflects the guide wheel to enable the side face of the guide wheel to be tightly attached to the outer wall of the pipeline to be in a pressed state, so that the stability of the spraying machine at the end of the pipeline is further guaranteed, and a spraying head can better cover the rear section of the pipeline; and the spraying uniformity of the rear section of the pipeline is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline inner wall spraying, and particularly to a pipeline inner wall spraying machine capable of uniform spraying. Background Art

[0002] Anticorrosive painting treatment of the pipeline inner wall is a widely used protection method, aiming to extend the service life of the pipeline and ensure its safe operation. By forming a uniform and dense anticorrosive coating on the pipeline inner wall, it can effectively block the direct contact between corrosive media and the pipeline inner wall, thereby significantly slowing down the corrosion process.

[0003] Currently, in the spraying operation of the pipeline inner wall, the widely adopted method is to use a spraying device with a guide wheel support structure to fit the pipeline inner wall. In this way, the staff pulls the spraying device to move it along the pipeline inner wall. During the movement process, the spraying device will automatically rotate to achieve uniform spraying of the pipeline inner wall. However, when the spraying operation progresses to the last section of the pipeline, a thorny problem emerges. Since the spraying device needs to be removed from the pipeline, the stable support provided by the guide wheel support to fit the pipeline inner wall disappears at this time, which leads to a significant reduction in the stability of the spraying device when spraying the rear end of the pipeline. In current actual operations, when the spraying device is removed from the pipeline, in order to ensure the spraying accuracy and continuity, the staff needs to manually support the device to keep it in alignment. However, this operation not only consumes manpower but is also extremely troublesome, requiring a high level of proficiency and concentration from the staff. At the same time, it may also cause fluctuations in the spraying quality due to human factors, affecting the spraying effect and quality. For this reason, we propose a pipeline inner wall spraying machine capable of uniform spraying. Summary of the Invention

[0004] To solve the above technical problems, an embodiment of the present application provides a pipeline inner wall spraying machine capable of uniform spraying, including a spraying machine main body, on which a rotatable spraying head is installed, and a connecting cylinder is further connected to a side of the spraying machine main body facing away from the spraying head. An inclination-adjustable first guide wheel member is installed at one end of the connecting cylinder close to the spraying head. It further includes:

[0005] An inclination-adjustable second guide wheel member, which is arranged outside the connecting cylinder and is staggeredly arranged with the first guide wheel member. The second guide wheel member consists of a support part, an inclined part, and a guide wheel, and the second guide wheel member can move along the length direction of the connecting cylinder;

[0006] An inclination assembly, which is arranged on the second guide wheel member and is used to drive the inclined part to incline after the second guide wheel member is removed from the pipeline to be painted;

[0007] The deflection assembly is connected to the inclination assembly, and the deflection assembly is used to deflect the guide wheel while the inclination assembly drives the inclined part to incline, so that the side surface of the guide wheel fits the outer wall of the pipeline to be painted.

[0008] The follow-up unlocking assembly is connected to the inclination assembly and is used to synchronously unlock the support part and the connecting cylinder when the inclination assembly drives the inclined part to incline.

[0009] In some embodiments, the bottom end of the support part is hinged with an installation sliding seat. Three convex rails are fixedly arranged on the outer wall of the connecting cylinder in an annular array. The convex rail has a slideway for the installation sliding seat to move along the length direction, and a limiting groove is formed in the side wall of the convex rail. The two ends of the installation sliding seat are connected with limiting blocks that can move along the limiting groove.

[0010] In some embodiments, the inclination assembly includes a first telescopic rod installed inside the support part. The top end of the first telescopic rod is installed with a support plate. One end of the upper end surface of the support plate is vertically connected with a rack. A connecting shaft is arranged at the hinge joint of the inclined part and the support part. A second straight gear is installed at the outer end of the connecting shaft. A first straight gear meshing with the second straight gear is installed on the side wall of the inclined part. The rack is meshed and connected with the first straight gear.

[0011] In some embodiments, a guiding convex block is fixed at the end of the support plate, and a guiding groove is formed at the upper end of the outside of the support part. The guiding convex block is in sliding fit with the guiding groove.

[0012] In some embodiments, the deflection assembly includes a connecting rod rotatably connected to the upper end inside the inclined part. A belt connecting piece is connected between the connecting rod and the connecting shaft. A first bevel gear is installed at the outer end of the connecting rod. A second bevel gear is installed at the bottom end of the guide wheel through a shaft body. The second bevel gear is meshed and connected with the first bevel gear.

[0013] In some embodiments, the follow-up unlocking assembly includes a locking structure and a positioning structure. The locking structure is separated from the positioning structure through the inclination assembly.

[0014] In some embodiments, the locking structure includes a second connecting strip connected to one end of the upper end surface of the support plate. The outer end of the second connecting strip is hinged with a first connecting strip. The bottom end of the first connecting strip is hinged with an inserting strip.

[0015] In some embodiments, the positioning structure includes a fixing block fixed on the outer wall of the convex rail. The fixing block has a receiving groove. A pressing block is arranged in the receiving groove. The upper end surface of the pressing block is set as an extrusion inclined surface. Springs are connected between the two sides of the inner end of the pressing block and the inside of the receiving groove. A positioning block is connected to the outer end of the pressing block. A positioning groove for the positioning block to be embedded is formed in the side wall of the installation sliding seat.

[0016] In some embodiments, a through groove is formed in the side wall of the convex rail, and the positioning block can penetrate through the through groove.

[0017] In some embodiments, a mounting seat is embedded at the top end of the inclined portion. A second telescopic rod is installed between the mounting seat and the guide wheel, and the second telescopic rod is rotatably installed on the mounting seat.

[0018] The present invention has at least the following beneficial effects:

[0019] 1. Improve spraying uniformity: After the guide wheel of the second guide wheel assembly disengages from the inner wall of the pipeline, the inclined component is activated to tilt the inclined portion. At the same time, the deflection component deflects the guide wheel, making the side surface of the guide wheel tightly adhere to the outer wall of the pipeline in a pressing state, further ensuring the stability of the spraying machine at the end of the pipeline, enabling the spraying head to better cover the rear section of the pipeline, and improving the spraying uniformity of the rear section of the pipeline.

[0020] 2. Achieve synchronous operation: The inclined component, the deflection component, and the follow-up unlocking component cooperate with each other. When the inclined component drives the inclined portion to tilt, the deflection component synchronously deflects the guide wheel, and the follow-up unlocking component synchronously releases the locking between the support portion and the convex rail on the connecting cylinder, realizing the synchronous progress of tilting, deflecting, and unlocking, making the spraying machine move more smoothly during the movement process without excessive manual intervention.

[0021] 3. Reduce labor costs: After the guide wheel of the second guide wheel assembly disengages from the inner wall of the pipeline, the spraying machine can automatically perform operations such as tilting, deflecting, and unlocking. As the connecting cylinder is further pulled outwards, the connecting cylinder can move along the installation sliding seat at the bottom end of the support portion, enabling the main body of the spraying machine and the spraying head to continue to move stably rearward, maximizing the subsequent approach of the spraying head to the end of the pipeline without manual alignment, thus reducing labor costs.

[0022] 4. The outer wall of the connecting cylinder is fixedly provided with convex rails in an annular array. A sliding track and a limiting groove are provided on the convex rails. The installation sliding seat is limited by the limiting block cooperating with the limiting groove, which can limit the installation sliding seat to prevent the support portion from disengaging from the convex rail; the design of the locking structure and the positioning structure ensures the locking between the support portion and the convex rail during normal spraying and unlocking when needed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 is a schematic diagram of the overall structure of the present invention from another orientation;

[0025] Figure 3 is a schematic diagram of the structure of the main body of the spraying machine and the convex rail of the present invention;

[0026] Figure 4Schematic diagram of the combined state of the second guide wheel member, tilting assembly, deflection assembly and follower unlocking assembly of the present invention;

[0027] Figure 5 Schematic diagram of the mounting slide of the present invention;

[0028] Figure 6 Schematic diagram of the disassembled state of the follower unlocking assembly of the present invention;

[0029] Figure 7 Schematic diagram of the combined state of the second guide wheel member and the deflection assembly of the present invention;

[0030] Figure 8 Schematic diagram of the combined state of the tilting assembly and the deflection assembly of the present invention;

[0031] Figure 9 Schematic diagram of the deflection assembly of the present invention;

[0032] Figure 10 Schematic diagram of the support part of the present invention;

[0033] Figure 11 Schematic diagram of the present invention in the use state;

[0034] Figure 12 Schematic diagram of the connection between the tilting part and the guide wheel under the second embodiment of the present invention.

[0035] In the figure: 1 - Spraying machine main body; 2 - Spraying head; 3 - Connecting cylinder; 4 - First guide wheel member;

[0036] 5 - Second guide wheel member; 51 - Support part; 511 - Guide groove; 52 - Tilting part; 53 - Guide wheel; 54 - Mounting slide; 541 - Positioning groove; 542 - Limit block;

[0037] 6 - Tilting assembly; 61 - First telescopic rod; 62 - Support plate; 621 - Guide projection; 63 - Rack; 64 - First spur gear; 65 - Second spur gear; 66 - Connecting shaft;

[0038] 7 - Deflection assembly; 71 - Belt connecting piece; 72 - Connecting rod; 73 - First bevel gear; 74 - Second bevel gear;

[0039] 8 - Follower unlocking assembly; 81 - Locking structure; 811 - First connecting bar; 812 - Second connecting bar; 813 - Insert bar; 82 - Positioning structure; 821 - Fixed block; 822 - Pressing block; 823 - Extrusion inclined surface; 824 - Spring; 825 - Positioning block;

[0040] 9 - Convex rail; 91 - Limit groove; 92 - Through groove

[0041] 10- second telescopic rod; 11- mounting seat. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Example 1: Please refer to Figures 1-11 As shown, the present invention provides a technical solution: a pipe inner wall sprayer that can spray uniformly, including a sprayer main body 1, a rotatable spray head 2 is installed at one end of the sprayer main body 1, and a connecting tube 3 is connected to the side of the sprayer main body 1 facing away from the spray head 2, and a through hole is provided in the connecting tube 3 for the paint tube and the connecting line to pass through, and a first guide wheel component 4 with adjustable inclination is installed at one end of the connecting tube 3 close to the spray head 2, and the bottom end of the first guide wheel component 4 is hinged to the connecting tube 3, and the adjustment of the inclination is achieved by the cooperation of a spring component and an electric telescopic rod. The above is the prior art, and the specific structure is not repeated here, and also includes a second guide wheel component 5 with adjustable inclination, a tilting assembly 6, a deflection assembly 7 and a follow-up unlocking assembly 8, the inclination of the second guide wheel component 5 is adjustable, and the cooperation of a spring component and an electric telescopic rod can also be set for the adjustable inclination of the second guide wheel component 5. To achieve the adjustment of the inclination, the second guide wheel member 5 is arranged on the outside of the connecting tube 3 and is staggered with the first guide wheel member 4. The second guide wheel member 5 is composed of a supporting portion 51, an inclined portion 52 and a guide wheel 53, and the second guide wheel member 5 can move along the length direction of the connecting tube 3; the tilting component 6 is arranged on the second guide wheel member 5, and the tilting component 6 is used to drive the inclined portion 52 to tilt after the second guide wheel member 5 moves out of the pipe to be painted; the deflection component 7 is connected to the tilting component 6, and the deflection component 7 is used to realize the deflection of the guide wheel 53 while the tilting component 6 drives the inclined portion 52 to tilt, so that the side of the guide wheel 53 fits the outer wall of the pipe to be painted; the follow-up unlocking component 8 is connected to the tilting component 6, and is used to synchronously release the lock of the support portion 51 and the connecting tube 3 when the tilting component 6 drives the inclined portion 52 to tilt, so as to realize the relative sliding of the support portion 51 and the connecting tube 3.

[0044] Among them, see Figures 3-5As shown, the bottom end of the support part 51 is hinged with an installation sliding seat 54. Three convex rails 9 are fixedly arranged on the outer wall of the connecting cylinder 3 in an annular array. The convex rail 9 has a slideway for the installation sliding seat 54 to move along the length direction. A limiting groove 91 is formed on the side wall of the convex rail 9. The two ends of the installation sliding seat 54 are connected with limiting blocks 542 that can move along the limiting groove 91. After the support part 51 and the connecting cylinder 3 are unlocked, the installation sliding seat 54 can slide along the slideway on the convex rail 9, and the movement of the limiting blocks 542 along the limiting groove 91 can limit the installation sliding seat 54 to prevent the support part 51 from detaching from the convex rail 9.

[0045] It should be noted that when the spraying machine moves and sprays on the inner wall of the pipeline by relying on the first guide wheel part 4 and the second guide wheel part 5, the convex rail 9 on the support part 51 and the connecting cylinder 3 is always in a locked state, and the unlocking between the support part 51 and the convex rail 9 is only carried out after the second guide wheel part 5 detaches from the inner wall of the pipeline.

[0046] Refer to Figure 4 and Figures 8-10 As shown, the inclination assembly 6 includes a first telescopic rod 61 installed inside the support part 51. The first telescopic rod 61 is preferably an electric telescopic rod. A support plate 62 is installed at the top end of the first telescopic rod 61. One end of the upper end surface of the support plate 62 is vertically connected with a rack 63. A connecting shaft 66 is arranged at the hinge joint of the inclination part 52 and the support part 51. A second straight gear 65 is installed at the outer end of the connecting shaft 66. A first straight gear 64 meshing with the second straight gear 65 is installed on the side wall of the inclination part 52. The rack 63 is meshed and connected with the first straight gear 64. In the initial state, the rack 63 is always meshed with the first straight gear 64. A guiding convex block 621 is fixed at the end of the support plate 62. A guiding groove 511 is formed at the upper end of the outside of the support part 51. The guiding convex block 621 is in sliding fit with the guiding groove 511. After the guide wheel 53 of the second guide wheel part 5 detaches from the inner wall of the pipeline, the first telescopic rod 61 is immediately started. The first telescopic rod 61 drives the rack 63 to move upward. The rack 63 drives the meshing first straight gear 64 to rotate, so that the second straight gear 65 rotates, and then the inclination part 52 can be driven to incline.

[0047] The specific description of starting the first telescopic rod 61 is as follows:

[0048] (1) It is equipped with a start-stop switch. The staff can hold the start-stop switch. After pulling the spraying machine to move until the guide wheel 53 of the second guide wheel part 5 detaches from the inner wall of the pipeline, at this time, the staff immediately uses the switch to start the first telescopic rod 61 to realize the inclination of the inclination part 52 (the switch can also be used to control the inclination angle of the support part 51. After the guide wheel 53 detaches from the inner wall of the pipeline, the staff simultaneously uses the switch to adjust the inclination degree of the support part 51).

[0049] (2) A pressure sensor is embedded in the guide wheel 53, and a controller (not shown) is provided on the spray machine. After the guide wheel 53 is separated from the inner wall of the pipe, the pressure sensor will promptly feed back a signal to the controller, and the controller will promptly start the first telescopic rod 61 to achieve the tilting of the tilting part 52 (at the same time, the controller also controls the switch to adjust the tilt of the support part 51).

[0050] See also Figure 4 as well as Figures 7-9 As shown, the deflection assembly 7 includes a connecting rod 72 rotatably connected to the upper end of the inner part of the inclined portion 52, and a belt connecting member 71 is connected between the connecting rod 72 and the connecting shaft 66. The belt connecting member 71 is composed of two pulleys and a transmission belt. The two pulleys are respectively fixed on the connecting rod 72 and the connecting shaft 66, and a first bevel gear 73 is installed at an outer end of the connecting rod 72. A second bevel gear 74 is installed at the bottom end of the guide wheel 53 through a shaft. The second bevel gear 74 is meshed and connected to the first bevel gear 73. When the rack 63 moves upward to drive the first spur gear 64 to rotate, the belt connecting member 71 drives the connecting rod 72 to rotate, thereby realizing the rotation of the second bevel gear 74, thereby realizing the deflection of the guide wheel 53. In conjunction with the inclination of the inclined portion 52, the side of the guide wheel 53 can be pressed against the outer wall of the pipe to ensure stability.

[0051] The transmission ratio of the first bevel gear 73 and the second bevel gear 74 is set so that after the inclined portion 52 is tilted to a certain position, the guide wheel 53 can be deflected by 90 degrees.

[0052] See also Figure 4 as well as Figure 6 As shown, the follow-up unlocking assembly 8 includes a locking structure 81 and a positioning structure 82 , and the locking structure 81 is separated from the positioning structure 82 by tilting the assembly 6 .

[0053] The locking structure 81 includes a second connecting strip 812 connected to one end of the upper end surface of the support plate 62, the outer end of the second connecting strip 812 is hinged to the first connecting strip 811, and the bottom end of the first connecting strip 811 is hinged to the insertion strip 813;

[0054] The positioning structure 82 includes a fixing block 821 fixed to the outer wall of the convex rail 9. The fixing block 821 has a receiving groove. A pressing block 822 is arranged in the receiving groove. The upper end surface of the pressing block 822 is set as an extrusion inclined surface 823. Springs 824 are connected between the two sides of the inner end of the pressing block 822 and the inside of the receiving groove. The outer end of the pressing block 822 is connected with a positioning block 825. A positioning groove 541 for the positioning block 825 to be embedded is formed on the side wall of the installation slide seat 54. In the natural state of the spring 824, the positioning block 825 is in a state of disengaging from the positioning groove 541. A through groove 92 is formed on the side wall of the convex rail 9. The positioning block 825 can penetrate through the through groove 92. While the first telescopic rod 61 extends, the second connecting bar 812 rises synchronously, which will pull the first connecting bar 811 upward, so that the insertion bar 813 inserted into the receiving groove to block the outward movement of the pressing block 822 moves upward. After the insertion bar 813 completely disengages from the receiving groove, the pressing block 822 will move outward under the action of the spring 824, so that the positioning block 825 disengages from the positioning groove 541, and the unlocking between the support part 51 and the convex rail 9 can be completed, realizing the synchronous realization of tilting, deflecting and unlocking.

[0055] Wherein, when spraying by relying on the normal movement of the first guide wheel member 4 and the second guide wheel member 5 on the inner wall of the pipeline, at this time, the insertion bar 813 is in the receiving groove and is in a state of blocking the outward movement of the pressing block 822 to ensure the locking between the support part 51 and the convex rail 9. To ensure the stability of the insertion bar 813 in the receiving groove, an anti-slip layer can be arranged on the side wall of the insertion bar 813, or anti-slip convex blocks with a retractable anti-slip layer can be arranged on the side wall of the insertion bar 813. The anti-slip convex blocks can be connected to the inside of the insertion bar 813 by elastic members (spring members), and inclined surfaces can be arranged on the upper and lower surfaces of the anti-slip convex blocks to facilitate the insertion bar 813 to disengage from the receiving groove when the first connecting bar 811 is pulled upward.

[0056] Refer to Figure 11 As shown in the figure, a in the figure is the pipeline with inner wall painted. When the staff pulls the paint spraying machine to retreat in the pipeline to spray paint to the last end, after the guide wheel 53 of the second guide wheel member 5 disengages from the inner wall of the pipeline, the second guide wheel member 5 can first increase the inclination angle so that the guide wheel 53 is higher than the outer wall of the pipeline, and then the inclination component 6 is started to make the side surface of the guide wheel 53 fit the outer wall of the pipeline in a pressed state.

[0057] Through the above, during specific use, the staff can place the spraying machine inside the pipeline to be sprayed (adjusted to an appropriate inclination through the first guide wheel member 4 and the second guide wheel member 5 with adjustable inclination), with one end of the spraying head 2 at one end of the pipeline to be sprayed first. Then, the staff can pull the paint pipe and the connecting wire passing through the connecting cylinder 3 to pull the spraying machine to move orderly. During the movement, the spraying head 2 rotates to spray paint (or is pulled by connecting a rope). After the guide wheel 53 of the second guide wheel member 5 separates from the inner wall of the pipeline, the tilting assembly 6 is activated to tilt the tilting part 52. At the same time, the deflection assembly 7 is synchronously activated to deflect the guide wheel 53, so as to use the guide wheel 53 to press against the outer wall of the pipeline end to ensure stability. And when the tilting assembly 6 is activated, the follow-up unlocking assembly 8 operates synchronously to release the lock between the supporting part 51 and the convex rail 9. As the connecting cylinder 3 is continuously pulled outwards, at this time, the connecting cylinder 3 can move along the mounting slide 54 at the bottom of the supporting part 51 depending on the provided convex rail 9, so that the spraying machine main body 1 and the spraying head 2 continue to move backward stably, and the spraying head 2 can be maximally close to the end of the pipeline subsequently, without manual alignment, reducing the manpower and improving the uniformity of the spraying of the rear section of the pipeline.

[0058] Embodiment 2: Please refer to Figure 12 As shown, the difference between this embodiment and Embodiment 1 is that a mounting seat 11 is embedded at the top of the tilting part 52, and a second telescopic rod 10 is installed between the mounting seat 11 and the guide wheel 53. The second telescopic rod 10 is preferably an electric telescopic rod, and the second telescopic rod 10 is rotatably installed on the mounting seat 11.

[0059] Through the above, after the side of the guide wheel 53 is closely attached to the outer wall of the pipeline, as the connecting cylinder 3 continues to move outwards, after the spraying machine main body 1 moves to the second guide wheel member 5, the spraying head 2 is still a short distance away from the outer end of the pipeline. At this time, the second telescopic rod 10 can be activated to move the tilting part 52 outwards, so that with the outward pull, the spraying head 2 continues to move outwards until it sprays to the outermost end of the inner wall of the pipeline, which can further improve the uniformity of the spraying of the entire pipeline.

[0060] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0061] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A pipe inner wall spraying machine capable of uniform spraying, comprising a spraying machine body (1), on which a rotatable spraying head (2) is mounted, and a connecting tube (3) is connected to the side of the spraying machine body (1) facing away from the spraying head (2), and a first guide wheel (4) with adjustable inclination is mounted on the end of the connecting tube (3) close to the spraying head (2), characterized in that: Also included are: A second guide wheel member (5) with adjustable inclination is arranged outside the connecting tube (3) and is arranged alternately with the first guide wheel member (4); the second guide wheel member (5) is composed of a supporting portion (51), an inclined portion (52) and a guide wheel (53); and the second guide wheel member (5) can move along the length direction of the connecting tube (3); A tilting assembly (6) is arranged on the second guide wheel member (5) and is used to drive the tilting portion (52) to tilt after the second guide wheel member (5) moves out of the pipeline to be sprayed with paint; A deflection assembly (7) is connected to the tilting assembly (6), and the deflection assembly (7) is used to realize the deflection of the guide wheel (53) while the tilting assembly (6) drives the tilting portion (52) to tilt, so that the side of the guide wheel (53) is in contact with the outer wall of the pipeline to be painted; The follow-up unlocking assembly (8) is connected to the tilting assembly (6) and is used to synchronously unlock the supporting portion (51) and the connecting cylinder (3) when the tilting assembly (6) drives the tilting portion (52) to tilt.

2. The pipe inner wall spraying machine capable of uniform spraying according to claim 1 is characterized in that: The bottom end of the support portion (51) is hingedly connected with a mounting slide (54); the outer wall of the connecting tube (3) is fixed with three convex rails (9) in a ring array; the convex rail (9) has a slideway for the mounting slide (54) to move along the length direction; the side wall of the convex rail (9) is provided with a limiting groove (91); and both ends of the mounting slide (54) are connected with limiting blocks (542) that can move along the limiting groove (91).

3. The pipe inner wall spraying machine capable of uniform spraying according to claim 2 is characterized in that: The tilting assembly (6) comprises a first telescopic rod (61) installed inside the supporting part (51); a support plate (62) is installed at the top end of the first telescopic rod (61); one end of the upper end surface of the support plate (62) is vertically connected to a rack (63); a connecting shaft (66) is provided at the hinge between the tilting part (52) and the supporting part (51); a second spur gear (65) is installed at the outer end of the connecting shaft (66); a first spur gear (64) meshingly connected to the second spur gear (65) is installed on the side wall of the tilting part (52); and the rack (63) is meshingly connected to the first spur gear (64).

4. The pipe inner wall spraying machine capable of uniform spraying according to claim 3 is characterized in that: A guide protrusion (621) is fixed to the end of the support plate (62), a guide groove (511) is provided at the outer upper end of the support portion (51), and the guide protrusion (621) slidably matches the guide groove (511).

5. The pipe inner wall spraying machine capable of uniform spraying according to claim 3 is characterized in that: The deflection assembly (7) comprises a connecting rod (72) rotatably connected to the upper end of the inner part of the inclined portion (52), a belt connecting member (71) is connected between the connecting rod (72) and the connecting shaft (66), and a first bevel gear (73) is installed at one end of the outer side of the connecting rod (72), and a second bevel gear (74) is installed at the bottom end of the guide wheel (53) through a shaft, and the second bevel gear (74) is meshingly connected to the first bevel gear (73).

6. The pipe inner wall spraying machine capable of uniform spraying according to claim 3 is characterized in that: The follow-up unlocking assembly (8) comprises a locking structure (81) and a positioning structure (82), and the locking structure (81) is separated from the positioning structure (82) by the tilting assembly (6).

7. The pipe inner wall spraying machine capable of uniform spraying according to claim 6 is characterized in that: The locking structure (81) comprises a second connecting strip (812) connected to one end of the upper end surface of the support plate (62), the outer end of the second connecting strip (812) is hinged to the first connecting strip (811), and the bottom end of the first connecting strip (811) is hinged to the insertion strip (813).

8. The pipe inner wall spraying machine capable of uniform spraying according to claim 7 is characterized in that: The positioning structure (82) includes a fixed block (821) fixed to the outer wall of the convex rail (9), the fixed block (821) having a receiving groove, a pressing block (822) being arranged in the receiving groove, the upper end surface of the pressing block (822) being arranged as an extrusion inclined surface (823), and springs (824) being connected between the inner ends of the pressing block (822) and the inside of the receiving groove, the outer end of the pressing block (822) being connected to a positioning block (825), and the side wall of the mounting slide seat (54) being provided with a positioning groove (541) for the positioning block (825) to be embedded.

9. The pipe inner wall spraying machine capable of uniform spraying according to claim 8, characterized in that: The side wall of the convex rail (9) is provided with a through slot (92), and the positioning block (825) can pass through the through slot (92).

10. The pipe inner wall spraying machine capable of uniform spraying according to claim 1, characterized in that: A mounting seat (11) is embedded at the top end of the inclined portion (52), a second telescopic rod (10) is installed between the mounting seat (11) and the guide wheel (53), and the second telescopic rod (10) is rotatably mounted on the mounting seat (11).

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