Device and method for spraying anticorrosive coating on inner wall of large-diameter grooved pipe fitting

Abstract

The invention relates to the technical field of spraying, in particular to a spraying device and method for an anti-corrosion coating on the inner wall of a large-diameter grooved pipe fitting. A pushing air cylinder is fixed to a supporting frame, a pushing rod is connected with the output end of the pushing air cylinder, a supporting plate is fixed to the pushing rod, the supporting plate is provided with a first limiting block, and a rotating plate is rotationally arranged on the supporting plate; a plurality of second limiting blocks corresponding to the first limiting blocks are slidably arranged on the rotating plate, a first gear set is arranged on the outer side of the rotating plate, the triangular control block is slidably arranged at the bottom of the rotating plate and provided with a rack corresponding to the first gear set, the first spring is arranged between the triangular control block and the supporting frame, and the clamping assembly is arranged on the rotating plate. The supporting frame is used for clamping the grooved pipe fitting, and the rotating spray head is arranged on one side of the supporting frame and used for spraying the inner wall of the grooved pipe fitting. And the position of the grooved pipe fitting can be changed more conveniently, so that the same spray head is used for spraying in two directions, and the spraying efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of spraying, and particularly to an inner wall anti-corrosion coating spraying device and method for large-diameter grooved pipe fittings. Background Technique

[0002] Large-diameter grooved pipe fittings are important connectors used in pipeline systems, especially suitable for large-diameter pipeline projects that require high strength and sealing performance. Such pipe fittings are formed by machining a circular groove at the end of the pipeline and using a special rubber sealing ring and a clamp for fastening connection, thereby achieving a stable connection and good sealing between pipelines.

[0003] There are T-shaped pipes and cross-shaped pipes in grooved pipe fittings, which are used for the confluence and diversion of liquids. During the spraying process of such pipes, two perpendicular pipes need to be sprayed. The existing method is to manually adjust the position of the pipes and then spray, which has a large error in adjustment and reduces work efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide an inner wall anti-corrosion coating spraying device and method for large-diameter grooved pipe fittings, aiming to more conveniently replace the position of the grooved pipe fittings so as to use the same spray head to spray in two directions and improve the spraying efficiency.

[0005] To achieve the above purpose, in the first aspect, the present invention provides an inner wall anti-corrosion coating spraying device for large-diameter grooved pipe fittings, including a base, a support frame, a pushing component, a clamping component, and a rotating spray head. The support frame is fixedly connected to the base. The pushing component includes a push rod, a push cylinder, a support plate, a rotating plate, a triangular control block, and a first spring. The push cylinder is fixed to the support frame. The push rod is connected to the output end of the push cylinder. The support plate is fixed to the push rod. The support plate is provided with a first limit block. The rotating plate is rotatably arranged on the support plate. A plurality of second limit blocks are slidably arranged on the rotating plate corresponding to the first limit block. The cooperation between the first limit block and the second limit blocks enables the rotating plate to rotate unidirectionally. A first gear set is arranged on the outer side of the rotating plate. The triangular control block is slidably arranged at the bottom of the rotating plate. The triangular control block is provided with a rack corresponding to the first gear set. The first spring is arranged between the triangular control block and the support frame. The clamping block structure is slidably arranged on one side of the triangular control block. The clamping component is arranged on the rotating plate and is used for clamping the grooved pipe fittings. The rotating spray head is arranged on one side of the support frame and is used for spraying the inner wall of the grooved pipe fittings.

[0006] Wherein, the pushing component further includes a return spring, and the return spring is arranged between the push cylinder and the support plate.

[0007] Among them, the pushing component further includes a stabilizing pad, which is arranged between the support plate and the rotating plate and is used to provide rotational damping.

[0008] Among them, the support plate has a limiting groove, a limiting block is arranged on the rotating plate, and a second spring is arranged between the limiting block and the rotating plate.

[0009] Among them, the clamping component includes two clamping plates, a third spring, two sliding plates and a locking block. The two clamping plates are slidably arranged on the rotating plate, the third spring is arranged between the two clamping plates, the two sliding plates are respectively slidably connected to the two clamping plates, and the locking block is arranged on the sliding plate.

[0010] Among them, the locking block includes a locking screw, a block body and a washer. The block body is fixed to the sliding plate, the locking screw is threadedly connected to the block body and is located on one side of the block body, and the washer is arranged below the block body.

[0011] Among them, the rotating spray head includes a rotating sealing head, a connecting pipe, a double-spray head structure, a liquid pipe, a driving pump and a rotator. The rotating sealing head is rotatably arranged on the support frame, the connecting pipe is communicated with the rotating sealing head, the double-spray head structure is arranged on the connecting pipe, the liquid pipe is communicated with the rotating sealing head, the driving pump is communicated with the liquid pipe, and the rotator is used to drive the connecting pipe to rotate.

[0012] In a second aspect, the present invention also provides a method for spraying an anti-corrosion coating on the inner wall of a large-diameter grooved pipe fitting, including: fixing the grooved pipe fitting through the clamping component; Starting the pushing cylinder to drive the support plate to slide to the position of the rotating spray head. At this time, the rotating plate does not rotate under the support of the first limiting block and pushes the triangular control block to move downward; The rotating spray head sprays the first connecting pipe of the grooved pipe fitting; After spraying is completed, the support plate retracts. At this time, the first gear set and the rack are engaged to drive the rotating plate to rotate 90° to drive the second connecting pipe of the grooved pipe fitting to align with the rotating spray head; The pushing cylinder drives the support plate to move again. The rotating plate does not rotate under the cooperation of the second limiting block and the first limiting block and pushes the triangular control block to move downward; The rotating spray head sprays the second connecting pipe of the grooved pipe fitting.

[0013] The present invention relates to a device and method for spraying an anti-corrosion coating on the inner wall of a large-diameter grooved pipe, wherein a support frame is firmly fixed on a base. A push cylinder is installed on the support frame, and its output end is connected to a push rod, and the push rod is further connected to a support plate, thereby ensuring that the entire assembly can smoothly perform linear movement. The support plate is provided with a first limit block, and the rotating plate is connected to the support plate through a rotating shaft, so that it can rotate freely within a certain range. In particular, a plurality of second limit blocks are provided on the rotating plate, and these limit blocks can slide along the first limit block, thereby ensuring that the rotating plate can only rotate in one direction, thereby achieving precise control of the direction of movement. The structure of the limit block can be a wedge block supported by a spring, and when the inclined surface contacts the first limit block, the spring can be compressed and rotated, and in the opposite direction, the vertical surface contacts and cannot rotate. When in use, the grooved pipe is installed on the clamping assembly, and then the push cylinder is started to drive the push rod to move. When the rotating plate contacts the triangular control block, the second limit block is supported by the first limit block and does not rotate. The triangular control block is pressed down so that the grooved pipe is close to the rotating nozzle to spray inside the first channel of the grooved pipe. Then the cylinder is pushed back, and the rack and the first gear set are engaged, thereby driving the rotating plate to rotate to drive the grooved pipe to rotate 90°. After that, the second second limit block passes over the first limit block and contacts the first limit block. Then the second channel of the grooved pipe can be sprayed in the same way. In this way, the grooved pipe can be more conveniently transposed to use the same nozzle for spraying in two directions, thereby improving the spraying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 paying creative work.

[0015] Figure 1 It is a structural diagram of a device for spraying an anti-corrosion coating on the inner wall of a large-diameter grooved pipe according to the present invention.

[0016] Figure 2 It is a bottom structural diagram of a device for spraying an anti-corrosion coating on the inner wall of a large-diameter grooved pipe according to the present invention.

[0017] Figure 3 It is the right side structural diagram of a device for spraying an anti-corrosion coating on the inner wall of a large-diameter grooved pipe according to the present invention.

[0018] Figure 4 yes Figure 1 A partial enlargement of detail A.

[0019] Figure 5It is a sectional structure diagram of an anti-corrosion coating spraying device for the inner wall of large-diameter grooved pipe fittings of the present invention.

[0020] Figure 6 It is a left-side structure diagram of an anti-corrosion coating spraying device for the inner wall of large-diameter grooved pipe fittings of the present invention.

[0021] Figure 7 It is a flowchart of a method for spraying an anti-corrosion coating on the inner wall of large-diameter grooved pipe fittings of the present invention.

[0022] Base 101, support frame 102, pushing component 103, clamping component 104, rotating spray head 105, pushing rod 106, pushing cylinder 107, support plate 108, rotating plate 109, triangular control block 110, first spring 111, first gear set 112, rack 113, return spring 114, stable pad 115, limiting groove 116, first limiting block 117, second spring 118, clamping plate 119, third spring 120, sliding plate 121, locking block 122, locking screw 123, block 124, washer 125, rotating sealing head 126, connecting pipe 127, double-spray head structure 128, liquid pipe 129, driving pump 130, rotator 131, driving gear 132, driven gear 133, driving motor 134, second cylinder 135, support platform 136, moving block 137, detection head 138, screw 139, screw motor 140, block structure 141, second limiting block 142, limiting block 143. Detailed implementation manners

[0023] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0024] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. In addition, in the description of the present invention, the meaning of "a plurality of" is two or more unless otherwise specifically defined. First embodiment

[0025] Please refer to Figures 1 to 6, the present invention provides an anti-corrosion coating spraying device for the inner wall of large-diameter grooved pipe fittings, including a base 101, a support frame 102, a pushing component 103, a clamping component 104, and a rotating spray head 105. The support frame 102 is fixedly connected to the base 101. The pushing component 103 includes a push rod 106, a pushing cylinder 107, a support plate 108, a rotating plate 109, a triangular control block 110, a block structure 141, and a first spring 111. The pushing cylinder 107 is fixed to the support frame 102, the push rod 106 is connected to the output end of the pushing cylinder 107, the support plate 108 is fixed to the push rod 106, the support plate 108 is provided with a first limit block 117, the rotating plate 109 is rotatably arranged on the support plate 108, a plurality of second limit blocks 142 are slidably arranged on the rotating plate 109 corresponding to the first limit block 117, and the cooperation between the first limit block 117 and the second limit blocks 142 enables the rotating plate 109 to rotate unidirectionally. A first gear set 112 is arranged on the outer side of the rotating plate 109, the triangular control block 110 is slidably arranged at the bottom of the rotating plate 109, the triangular control block 110 is provided with a rack 113 corresponding to the first gear set 112, the first spring 111 is arranged between the triangular control block 110 and the support frame 102, the block structure 141 is slidably arranged on one side of the triangular control block 110, the clamping component 104 is arranged on the rotating plate 109 for clamping the grooved pipe fittings, and the rotating spray head 105 is arranged on one side of the support frame 102 for spraying the inner wall of the grooved pipe fittings.

[0026] In this embodiment, the support frame 102 is firmly fixed to the base 101. The pushing cylinder 107 is installed on the support frame 102, its output end is connected to the push rod 106, and the push rod 106 is further connected to the support plate 108, ensuring that the entire component can move linearly smoothly. The support plate 108 is provided with a first limit block 117, and the rotating plate 109 is connected to the support plate 108 through a rotating shaft, enabling it to rotate freely within a certain range. Particularly, a plurality of second limit blocks 142 are arranged on the rotating plate 109, and these second limit blocks 142 can slide along the first limit block 117, ensuring that the rotating plate 109 can only rotate unidirectionally, thus achieving precise control of the movement direction. The structure of the first limit block 117 can be a wedge block supported by a spring, and when the inclined surface contacts the first limit block 117, it can compress the spring and rotate, while in the reverse direction, it is the vertical surface contact and cannot rotate.

[0027] When in use, the grooved pipe is installed on the clamping assembly 104, and then the push cylinder 107 is started to drive the push rod 106 to move. When the rotating plate 109 contacts the triangular control block 110, the second limit block 142 is supported by the first limit block 117 and does not rotate. The triangular control block 110 is pressed down, and the triangular control block is limited by the block structure 141, so that the grooved pipe is close to the rotating spray head 105 to spray the first channel of the grooved pipe. Then, the push cylinder 107 is withdrawn, and the block structure 141 is released to make the rack 113 and the first gear set 112 mesh, so that the rotating plate 109 is driven to rotate during the withdrawal of the push cylinder 107 to drive the grooved pipe to rotate 90°, and then the second second limit block 142 passes over the first limit block 117 and conflicts with the first limit block 117. Then, the second channel of the grooved pipe can be sprayed in the same way. In this way, the grooved pipe fittings can be more conveniently replaced so that the same nozzle can be used for spraying in two directions, thereby improving the spraying efficiency.

[0028] The pushing assembly 103 further includes a return spring 114 , and the return spring 114 is disposed between the pushing cylinder 107 and the support plate 108 .

[0029] The return spring 114 is cleverly arranged between the push cylinder 107 and the support plate 108. The purpose of this design is that when the push cylinder 107 completes a push action, the return spring 114 can help the support plate 108 return to the initial position quickly and smoothly, ensuring the efficiency and consistency of the entire operation process.

[0030] The pushing assembly 103 further includes a stabilizing pad 115 , which is disposed between the supporting plate 108 and the rotating plate 109 to provide rotation damping.

[0031] In order to increase the stability and accuracy of the rotating plate 109 when adjusting the angle, the pushing assembly 103 also introduces a stabilizing pad 115. The stabilizing pad 115 is located between the supporting plate 108 and the rotating plate 109, and its main function is to provide a certain degree of rotation damping. This means that when the rotating plate 109 is adjusting the angle, the stabilizing pad 115 can effectively slow down its rotation speed, and can make the rotating plate 109 stop at any angle, preventing inaccurate positioning or operating errors caused by too fast rotation, thereby ensuring that each adjustment can be accurate.

[0032] The support plate 108 has a limiting groove 116 , a limiting block 143 is disposed on the rotating plate 109 , and a second spring 118 is disposed between the limiting block 143 and the rotating plate 109 .

[0033] The support plate 108 is specially designed with a limiting groove 116. Correspondingly, a limiting block 143 is provided on the rotating plate 109. Such a structural design not only helps to limit the rotation range of the rotating plate 109, avoiding equipment damage or operation errors caused by excessive rotation, but also a second spring 118 is arranged between the limiting block 143 and the rotating plate 109. The function of this second spring 118 is that when the rotating plate 109 is displaced due to an external force, it can provide a reverse force to urge the rotating plate 109 to return to the preset position, thereby increasing the self-adjusting ability and stability of the system.

[0034] The clamping assembly 104 includes two clamping plates 119, a third spring 120, two sliding plates 121 and a locking block 122. The two clamping plates 119 are slidably arranged on the rotating plate 109. The third spring 120 is arranged between the two clamping plates 119. The two sliding plates 121 are respectively slidably connected to the two clamping plates 119. The locking block 122 is arranged on the sliding plate 121.

[0035] The two clamping plates 119 are designed to be slidably adjusted on the rotating plate 109. This design enables the clamping assembly 104 to flexibly adjust its opening width according to the groove pipe fittings of different diameters, so as to effectively clamp various specifications of pipe fittings. A third spring 120 is arranged between the two clamping plates 119, which can tighten the two clamping plates 119 to clamp the pipeline.

[0036] In addition, the clamping assembly 104 further includes two sliding plates 121, and each sliding plate 121 is respectively slidably connected to a clamping plate 119. This connection method not only ensures that the clamping plate 119 can smoothly move along the preset track, but also by adjusting the position of the sliding plate 121, the two ends of the groove pipe fittings can be clamped. The design of the sliding plate 121 enhances the flexibility and stability of the entire clamping process, so that even pipe fittings with irregular shapes or slightly different sizes can be firmly fixed.

[0037] Finally, the locking block 122 is cleverly arranged on the sliding plate 121. Its main function is to lock the position of the sliding plate 121 to ensure that during the spraying operation, the clamping assembly 104 will not be displaced due to the influence of external forces, thus ensuring the stability and safety of the entire operation process.

[0038] The locking block 122 includes a locking screw 123, a block body 124 and a washer 125. The block body 124 is fixed to the sliding plate 121. The locking screw 123 is threadedly connected to the block body 124 and is located on one side of the block body 124. The washer 125 is arranged below the block body 124.

[0039] The block 124 serves as the basic component of the locking block 122 and is firmly fixed on the sliding plate 121 to ensure that it can withstand various forces during the clamping process without displacement. The locking screw 123 can be conveniently rotated and adjusted through the threaded connection with the block 124, thereby realizing the locking or release of the position of the sliding plate 121. This design not only improves the operation efficiency but also enhances the safety and reliability of the entire clamping assembly 104. In order to prevent damage to the sliding plate 121 or other components during the fastening process and ensure the close contact between the locking screw 123 and the sliding plate 121, a washer 125 is also provided under the block 124. The application of the washer 125 effectively disperses the pressure exerted by the locking screw 123 and reduces the phenomenon of local stress concentration.

[0040] The rotating spray head 105 includes a rotating sealing head 126, a connecting pipe 127, a double-spray head structure 128, a liquid pipe 129, a driving pump 130, and a rotator 131. The rotating sealing head 126 is rotatably arranged on the support frame 102. The connecting pipe 127 is communicated with the rotating sealing head 126. The double-spray head structure 128 is arranged on the connecting pipe 127. The liquid pipe 129 is communicated with the rotating sealing head 126. The driving pump 130 is communicated with the liquid pipe 129. The rotator 131 is used to drive the connecting pipe 127 to rotate.

[0041] The rotating sealing head 126 is installed on the support frame 102 and can rotate freely, ensuring the flexibility and stability of the spray head during operation. The connecting pipe 127 is connected and communicated with the rotating sealing head 126, enabling the anticorrosive coating to flow smoothly to the double-spray head structure 128. The double-spray head structure 128 is located on the connecting pipe 127, and its design purpose is to increase the spraying coverage area and uniformity to ensure the coating quality. The liquid pipe 129 is also connected and communicated with the rotating sealing head 126 to form a complete anticorrosive coating conveying channel. The driving pump 130 is connected to the liquid pipe 129 to provide the necessary power to ensure that the coating can be conveyed to the spray head at an appropriate pressure and flow rate. In addition, the function of the rotator 131 is to drive the connecting pipe 127 to rotate to achieve comprehensive inner wall spraying.

[0042] The rotator 131 includes a driving gear 132, a driven gear 133, and a driving motor 134. The driven gear 133 is fixed to the connecting pipe 127. The driving gear 132 is connected to the driven gear 133. The output end of the driving motor 134 is connected to the driving gear 132.

[0043] The driven gear 133 is fixed to the connecting pipe 127, directly determining the rotation speed and direction of the connecting pipe 127. The driving gear 132 meshes with the driven gear 133, and transmits power to the driven gear 133 through mechanical transmission. The driving motor 134 serves as the power source of the entire system, and its output end is directly connected to the driving gear 132, providing continuous and stable rotational power for the rotating nozzle 105. Such a design not only ensures that the rotating nozzle 105 can operate stably under high-pressure conditions, but also facilitates adjusting the spraying speed and angle according to actual needs, greatly improving the work efficiency and coating quality.

[0044] The large-diameter grooved pipe fitting inner wall anti-corrosion coating spraying device further includes a position detection component. The position detection component includes a second cylinder 135, a support platform 136, two moving blocks 137, two detection heads 138, a screw rod 139, and a screw rod motor 140. The second cylinder 135 is fixed on the support frame 102. The support platform 136 is connected to the output end of the second cylinder 135. The two moving blocks 137 are slidably arranged on the support platform 136. The screw rod 139 has two sections of opposite threads, and the screw rod 139 is threadedly connected to the two moving blocks 137. The output end of the screw rod motor 140 is connected to the screw rod 139.

[0045] The second cylinder 135 is firmly fixed on the support frame 102. Its main function is to provide power so that the support platform 136 can perform precise linear movement within a certain range. This design allows the detection component to adjust the working position according to actual needs, thus ensuring the effective processing ability for grooved pipe fittings of different sizes. The support platform 136 is directly connected to the output end of the second cylinder 135, which means it can move smoothly along with the movement of the second cylinder 135. On this support platform 136, two moving blocks 137 are slidably arranged. The design of these two moving blocks 137 takes into account the need for flexible adjustment, enabling them to move freely according to specific working conditions to adapt to different operation requirements. More importantly, each moving block 137 is equipped with a detection head 138. These detection heads 138 can real-time monitor the relative position between the nozzle and the grooved pipe fitting, so that when the nozzle moves to the intersection position of the two channels, the spraying range can be adjusted. Specifically, when one detection head 138 detects the position of the nozzle, the spraying range is adjusted for local spraying. When the other detection head 138 detects the position of the nozzle, 360° spraying starts again.

[0046] The screw rod motor 140 serves as the power source of the entire position detection component, and its output end is directly connected to the screw rod 139. By controlling the rotation speed and direction of the screw rod motor 140, precise regulation of the positions of the two moving blocks 137 can be achieved. Second Embodiment

[0047] Please refer to Figure 7 , the present invention also provides a method for spraying an anti-corrosion coating on the inner wall of a large-diameter grooved pipe fitting, including: S201 Fix the grooved pipe fitting through the clamping assembly 104; The operator needs to place the large-diameter grooved pipe fitting to be processed at the designated position of the device and firmly clamp it using the clamping assembly 104. Adjust the position of the sliding plate 121 to adapt to pipe fittings of different diameters, and use the combination of the locking screw 123 and the washer 125 to ensure firm clamping, avoiding any displacement or loosening during subsequent operations.

[0048] S202 Start the pushing cylinder 107 to drive the support plate 108 to slide to the position of the rotating spray head 105. At this time, the rotating plate 109 does not rotate under the support of the first limit block 117 and pushes the triangular control block 110 downward; Start the pushing cylinder 107, which will drive the support plate 108 to slide smoothly along the preset track to a position close to the rotating spray head 105. During this process, the rotating plate 109 remains stationary due to the limitation of the first limit block 117, and at the same time, the triangular control block 110 is pushed downward. This design ensures that the support plate 108 can accurately reach the predetermined position and prepares for the subsequent spraying operation.

[0049] S203 The rotating spray head 105 sprays the first connecting pipe of the grooved pipe fitting; When the support plate 108 reaches the designated position, the rotating spray head 105 starts to work and evenly sprays the anti-corrosion coating on the first connecting pipe (assuming one end) of the grooved pipe fitting. This process is provided with coating pressure by the driving pump 130, and the uniform distribution of the coating is realized through the connecting pipe 127 and the double-spray head structure 128 to ensure that the quality and thickness of the anti-corrosion layer meet the standard requirements.

[0050] S204 After the spraying is completed, the support plate 108 retracts. At this time, the first gear set 112 and the rack 113 are engaged to drive the rotating plate 109 to rotate 90° to drive the second connecting pipe of the grooved pipe fitting to align with the rotating spray head 105; After the spraying of the first connecting pipe is completed, the support plate 108 starts to retract. During this process, due to the interaction between the first gear set 112 and the rack 113 on the triangular control block 110, the rotating plate 109 can accurately rotate 90 degrees, so that the other end (i.e., the second connecting pipe) of the grooved pipe fitting is aligned with the rotating spray head 105. The key to this step of operation lies in the precise positioning of the rotating plate 109 to ensure that the second connecting pipe is in the best spraying position.

[0051] The driving cylinder 107 of S205 drives the support plate 108 to move again. The rotating plate 109 is not rotated under the cooperation of the second limiting block 142 and the first limiting block 117, but instead pushes the triangular control block 110 downward. The driving cylinder 107 is started again to drive the support plate 108 to move towards the rotating spray head 105. In this step, the rotating plate 109 does not rotate due to the cooperation between the second limiting block 142 and the first limiting block 117, but instead continues to push the triangular control block 110 downward to ensure that the support plate 108 can reach the target position stably and is ready to spray the second connecting pipe.

[0052] In S206, the rotating spray head 105 sprays the second connecting pipe of the grooved pipe fitting.

[0053] The rotating spray head 105 sprays the anti-corrosion coating on the second connecting pipe of the grooved pipe fitting. Similar to the first spraying, this process also relies on the stable paint flow provided by the driving pump 130 and the precise control of the double-spray head structure 128 to ensure that the inner walls at both ends of the entire grooved pipe fitting are evenly and effectively anti-corrosion treated.

[0054] The above-disclosed is only a preferred embodiment of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present invention still fall within the scope covered by the invention.

Claims

1. A device for spraying an anti-corrosion coating on the inner wall of a large-diameter grooved pipe, comprising a base and a support frame, wherein the support frame is fixedly connected to the base and is located on one side of the base, and is characterized in that: It also includes a pushing component, a clamping component and a rotating spray head, the pushing component includes a pushing rod, a pushing cylinder, a supporting plate, a rotating plate, a triangular control block, a clamping block structure and a first spring, the pushing cylinder is fixed to the supporting frame, the pushing rod is connected to the output end of the pushing cylinder, the supporting plate is fixed to the pushing rod, the supporting plate is provided with a first limit block, the rotating plate is rotatably arranged on the supporting plate, a plurality of second limit blocks are slidably arranged on the rotating plate corresponding to the first limit block, the first limit block and the second limit block cooperate to make the rotating plate rotate unidirectionally, a first gear set is arranged on the outer side of the rotating plate, the triangular control block is slidably arranged at the bottom of the rotating plate, the triangular control block is provided with a rack corresponding to the first gear set, the first spring is arranged between the triangular control block and the supporting frame, the clamping block structure is slidably arranged on one side of the triangular control block, the clamping component is arranged on the rotating plate for clamping the groove pipe fitting, and the rotating spray head is arranged on one side of the supporting frame for spraying the inner wall of the groove pipe fitting.

2. A device for spraying an anti-corrosion coating on the inner wall of a large-diameter grooved pipe according to claim 1, characterized in that: The pushing assembly further includes a return spring, and the return spring is arranged between the pushing cylinder and the support plate.

3. A device for spraying an anti-corrosion coating on the inner wall of a large-diameter grooved pipe as claimed in claim 2, characterized in that: The pushing assembly further includes a stabilizing pad, which is disposed between the supporting plate and the rotating plate and is used for providing rotation damping.

4. A device for spraying an anti-corrosion coating on the inner wall of a large-diameter grooved pipe as claimed in claim 3, characterized in that: The support plate has a limiting groove, the rotating plate is provided with a limiting block, and a second spring is provided between the limiting block and the rotating plate.

5. A device for spraying an anti-corrosion coating on the inner wall of a large-diameter grooved pipe as claimed in claim 4, characterized in that: The clamping assembly includes two clamping plates, a third spring, two sliding plates and a locking block. The two clamping plates are slidably arranged on the rotating plate, the third spring is arranged between the two clamping plates, the two sliding plates are slidably connected to the two clamping plates respectively, and the locking block is arranged on the sliding plates.

6. A device for spraying an anti-corrosion coating on the inner wall of a large-diameter grooved pipe as claimed in claim 5, characterized in that: The locking block comprises a locking screw, a block and a washer. The block is fixed to the sliding plate. The locking screw is threadedly connected to the block and is located at one side of the block. The washer is arranged below the block.

7. A device for spraying an anti-corrosion coating on the inner wall of a large-diameter grooved pipe as claimed in claim 6, characterized in that: The rotating nozzle includes a rotating sealing head, a connecting pipe, a double nozzle structure, a liquid pipe, a driving pump and a rotator. The rotating sealing head is rotatably arranged on the supporting frame, the connecting pipe is connected to the rotating sealing head, the double nozzle structure is arranged on the connecting pipe, the liquid pipe is connected to the rotating sealing head, the driving pump is connected to the liquid pipe, and the rotator is used to drive the connecting pipe to rotate.

8. A method for spraying an anti-corrosion coating on the inner wall of a large-diameter grooved pipe, using the anti-corrosion coating spraying device for the inner wall of a large-diameter grooved pipe according to any one of claims 1 to 7, It is characterized in that The method comprises: fixing the grooved pipe fitting by a clamping assembly; Start the push cylinder to drive the support plate to slide to the rotating nozzle position. At this time, the rotating plate does not rotate under the support of the first limit block but pushes the triangular control block to move downward; Rotate the spray head to spray the first connecting pipe of the grooved pipe; After the spraying is completed, the support plate is withdrawn, and the first gear set and the rack are meshed to drive the rotating plate to rotate 90 degrees to drive the second connecting pipe of the groove pipe to align with the rotating spray head; The push cylinder drives the support plate to move again, and the rotating plate does not rotate under the cooperation of the second limit block and the first limit block, but pushes the triangular control block to move downward; The spray head is rotated to spray the second connecting pipe of the groove pipe fitting.

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