Elbow anti-corrosion processing equipment and method

Abstract

The invention discloses elbow anti-corrosion machining equipment and method, and relates to the technical field of pipe fitting anti-corrosion, the elbow anti-corrosion machining equipment comprises a spray gun set, the spray gun set is connected with a moving device through a fixing rod, and the moving device is used for driving the spray gun set to move in the axial direction of a pipe fitting; the spray gun set comprises a plurality of spray guns distributed in the annular direction of the fixing rod, each spray gun is connected with a linear driving mechanism, and the linear driving mechanisms are used for controlling the spray guns to be independently started and stopped in the radial direction of the pipe fitting. The spray gun set has the function of moving in the axial direction of the pipe fitting and meanwhile has the function of independently moving and adjusting in the radial direction of the elbow, spraying of the elbow is achieved, and the spraying thickness is stable.

Description

Technical Field

[0001] The invention relates to the technical field of pipe anti-corrosion, and in particular to an elbow anti-corrosion processing device and method. Background Art

[0002] Because elbow pipes have curvature, if the anti-corrosion is processed by conventional anti-corrosion methods such as straight line spraying and roller coating, the thickness of the inner wall coating will be seriously uneven after anti-corrosion. If the local coating is too thick, the anti-corrosion peeling strength cannot be met and the appearance is seriously orange peel. If the coating is too thin or the bottom is exposed, the coating thickness does not meet the requirements. Some automatic spraying equipment is disclosed in the prior art, such as:

[0003] Chinese utility model patent CN217594945U discloses a steel pipe internal and external anti-corrosion spraying machine, including a steel pipe body, an outer spraying ring is sleeved on the outside of the steel pipe body, and an inner spraying ring is sleeved on the inside of the steel pipe body. The synchronous spraying of the inner spraying ring and the outer spraying ring is achieved through the cooperation between the steel pipe body, the inner spraying ring, the outer spraying ring and the synchronization device; Chinese invention patent CN116532285A discloses a pipeline wall spraying equipment, including a pipeline, a clamping and fixing assembly arranged at both ends of the pipeline, and a mobile spraying assembly arranged in the inner cavity of the pipeline. The mobile spraying assembly includes a coating liquid cavity, a connecting pipe and a spray head. The distance between the spray head and the inner wall of the pipeline is adjusted by the spraying radius adjustment assembly to spray pipelines of different diameters. Although the above scheme can realize the spraying of the inner wall of the pipeline, the spray head is synchronously controlled and is not suitable for elbow structures. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an elbow anti-corrosion processing equipment and method. The spray gun group has the function of moving along the axial direction of the pipe, and at the same time has the function of moving and adjusting along the radial direction of the elbow alone, so as to realize spraying of the elbow, and the spraying thickness is stable.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0006] In the first aspect, an embodiment of the present invention provides an elbow anti-corrosion processing equipment, including a spray gun group, which is connected to a moving device through a fixed rod, and the moving device is used to drive the spray gun group to move axially along the pipe fitting; the spray gun group includes a plurality of spray guns distributed circumferentially along the fixed rod, and each spray gun is connected to a linear drive mechanism, and the linear drive mechanism is used to control each spray gun to start and stop independently along the radial direction of the pipe fitting.

[0007] As a further implementation, the moving device and the linear drive mechanism are connected to a control console, and the control console is used to control the movement of each spray gun according to the axial coordinate x value of the spray gun along the pipe.

[0008] As a further implementation, the mobile device includes a mobile base, and the fixed rod is fixed to the mobile base;

[0009] The mobile base is also equipped with a storage bin, which is used to provide anti-corrosion powder to the spray gun.

[0010] As a further implementation, the linear drive mechanism includes a movable slideway and a lead screw and nut mechanism, and the spray gun is slidably connected to the movable slideway and is connected to the lead screw and nut mechanism.

[0011] In a second aspect, an embodiment of the present invention further provides a control method for an elbow anti-corrosion processing device, comprising:

[0012] The moving device drives the spray gun group to the set position of the pipe fitting, and the control console outputs two signals to the spray guns that enter the anti-corrosion range of the pipe fitting elbow. One signal controls the spray head to move toward the inner wall of the pipe fitting and keeps the spray gun at a set distance from the inner wall of the pipe fitting; the other signal controls the spray gun to start the spraying function.

[0013] As the mobile device continues to move and feeds back the travel coordinate signal to the control console, the control console controls the spray gun that moves out of the corrosion prevention range according to the moving position, shuts down the spraying function and retracts the spray gun; when all the nozzles are moved out of the corrosion prevention range, the control console controls the mobile device to return.

[0014] As a further implementation, the number of spray guns is N, and N satisfies:

[0015] N=D*π / K, where D is the diameter of the pipe, K is the spraying width, and N is an even number.

[0016] As a further implementation method, the moving distance of the moving device takes the axial center position of the pipe elbow as the zero point, and transmits distance data to the positive and negative sides respectively. The spraying range is:

[0017] Where R is the elbow turning radius and θ is the elbow angle.

[0018] As a further implementation, the spray gun has an independent automatic adjustment function to maintain a set distance from the inner wall of the pipe;

[0019] The first spray gun is the one facing the longest or shortest side of the pipe, and the second spray gun is the one facing one of the two sides. The data on the other side is symmetrical with that on this side;

[0020] The distance between the nth spray gun and the pipe fitting at position x along the axial direction of the elbow is:

[0021]

[0022] Among them, α is the angle between the nth spray gun and the first spray gun, N is the number of spray guns, R is the elbow turning radius, θ is the elbow angle, and D is the pipe diameter.

[0023] As a further implementation, when α≤90°, the extension distance y of the spray gun from the initial gun head position is expressed as:

[0024]

[0025] When α>90°, β=180°-α,

[0026]

[0027] in,

[0028] Wherein, H represents the initial length of the spray gun tip from the center of the fixed rod, and L represents the spraying distance.

[0029] As a further implementation, the spray gun has an independent automatic start and stop function, so as to start and stop spraying when the spray gun enters the critical position of contact with the pipe;

[0030] Each spray gun is reserved with an advance opening length G.

[0031] The beneficial effects of the present invention are as follows:

[0032] Based on the linear displacement of the spray gun group of the spray equipment of the present invention along the average axial centerline of the elbow, on the one hand, axial movement along the pipe from one end to the other end can be realized, and on the other hand, each spray gun has an independent radial movement and adjustment function along the elbow, so that the gun head of each spray gun is always kept within the distance segment from the inner wall of the elbow that meets the requirements of the spraying anti-corrosion process; in addition, due to the curvature of the elbow, the length of the elbow along the projection direction on the average axis of the elbow is different. In order to avoid waste of anti-corrosion powder when there is no pipe fitting at the spray gun spraying location, each spray gun of the present invention is combined with its respective position and the state of the pipe fitting to realize the independent automatic start and stop function of the spray gun spraying. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0034] Figure 1 is a schematic diagram of the overall structure of the device according to one or more embodiments of the present invention;

[0035] Figure 2 is a schematic diagram of a host structure according to one or more embodiments of the present invention;

[0036] Figure 3It is a schematic diagram of the structure of a spray gun assembly according to one or more embodiments of the present invention.

[0037] Among them, 1. control console, 2. moving device, 2-1. roller, 2-2. storage bin, 2-3. fixing rod, 3. spray gun group, 3-1. screw nut mechanism, 3-2. spray gun, 3-3. moving slide, 4. elbow. DETAILED DESCRIPTION

[0038] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0039] Embodiment 1:

[0040] This embodiment provides an elbow anti-corrosion processing device, such as Figure 1-Figure 3 As shown, it includes a spray gun group 3, a mobile device 2 and a control console 1. The spray gun group 3 is installed on the mobile device 2, and the spray gun 3-2 realizes the spraying action under the control of the control console 1.

[0041] In this embodiment, if Figure 2 As shown, the mobile device 2 includes a mobile base and a storage bin 2-2. The mobile base is moved by a roller 2-1 controlled by a servo motor. The storage bin 2-2 is installed on the upper side of the mobile base and is used to store anti-corrosion powder and transport the anti-corrosion powder to the spray gun 3-2 by pneumatic means. A fixed rod 2-3 is installed on the upper side of the mobile base through a support seat. The fixed rod 2-3 is arranged in the horizontal direction, and a spray gun group 3 is installed at the end of the fixed rod 2-3.

[0042] The spray gun group 3 includes a plurality of spray guns 3-2, such as Figure 3 As shown, a plurality of spray guns 3-2 are evenly distributed along the annular direction of the fixed rod 2-3, and each spray gun 3-2 is respectively connected to a linear drive mechanism, and the individual movement of each spray gun 3-2 is realized by the linear drive mechanism. In this embodiment, the linear drive mechanism includes a screw nut mechanism 3-1 and a movable slide 3-3, and the movable slide 3-3 is installed along the radial direction of the fixed rod 2-3 and has a certain length. The spray gun 3-2 is slidably connected to the movable slide 3-3, and the spray gun 3-2 is fixedly connected to the nut in the screw nut mechanism 3-1. Under the action of the screw nut mechanism 3-1, the spray gun 3-2 can move along the movable slide 3-3, thereby changing the distance between the spray gun 3-2 and the inner wall of the tube body.

[0043] It should be noted that the spray gun group 3 can be combined with different pipe diameter specifications to prepare different spray gun groups. The screw nut mechanism 3-1, N spray guns 3-2, and the spray gun moving slide 3-3 can be installed as a whole in a fixed sleeve, and the spray gun group 3 can be installed and switched as a whole when the model is switched.

[0044] The working principle of this embodiment is:

[0045] The elbow 4 to be anticorrosive is placed on a fixed frame, and the elbow 4 and the fixed frame are relatively fixed in position with the mobile device 2 in combination with corresponding parameters; during operation, the control console 1 sends an operation signal to the mobile device 2, and the servo motor and the roller 2-1 start to operate after receiving the signal, and feed back the corresponding operation data to the control console 1, which is automatically calculated by the control console 1 in combination with the data fed back by the servo motor and the roller 2-1, and when the spray gun group 3 enters the pre-operation range of the pipe fitting, the control console 1 sprays the spray gun 3 that has entered the anti-corrosion range of the inner wall of the elbow 4. -2 outputs two signals; one of the signals is transmitted to the screw nut mechanism 3-1, and the screw nut mechanism 3-1 drives the spray gun 3-2 to move toward the inner wall of the elbow 4 after receiving the signal, so that the gun head of the spray gun 3-2 maintains a distance L from the inner wall of the pipe fitting; the other signal is transmitted to the spray gun 3-2 that has entered the anti-corrosion range of the inner wall of the elbow 4, and the spray gun 3-2 starts the spraying function after receiving the signal, and sprays the anti-corrosion powder from the storage bin 2-2 through the pneumatic conveying pipeline from the spray gun 3-2 to the elbow 4 pipe fitting to perform anti-corrosion work.

[0046] As the mobile device 2 continues to move, the servo motor and the roller 2-1 feed back the travel coordinate signal to the control console 1 in real time. The control console 1 automatically calculates the data according to the moving position, and transmits the signal of closing the spraying and retracting the spray gun 3-2 of the spray gun group 3 that has moved out of the anti-corrosion range of the inner wall of the elbow 4. When the control console 1 receives the feedback from the servo motor and the roller 2-1 that all the spray guns 3-2 have moved out of the spraying range of the pipe fitting, the control console 1 sends a stop and return signal to the servo motor and the roller 2-1. After receiving the signal, the servo motor and the roller 2-1 reset the mobile device 2 until it runs to the initial point to complete one processing cycle.

[0047] Each spray gun 3-2 of this embodiment can be controlled individually, so that a set number of spray guns 3-2 can maintain a certain distance for elbow spraying; the spray gun 3-2 has the function of moving axially and independently in the radial direction of the elbow 4, so that the gun head of the spray gun 3-2 always maintains a constant distance from the inner wall of the elbow 4, ensuring the stability of the sprayed wall thickness.

[0048] Embodiment 2:

[0049] This embodiment provides a control method for elbow anti-corrosion processing equipment. Based on the elbow anti-corrosion processing equipment of the first embodiment, the extension length of each spray gun in the spray gun group of the equipment, the start and stop of the spray gun, and other actions are controlled in combination with the spray gun along the axial coordinate x value of the pipe fitting. The control process sets product parameters in combination with the actual processing product needs. The parameters include the following data:

[0050] D is the diameter of the elbow, θ is the angle of the elbow, R is the turning radius of the elbow, K is the spraying width, L is the spraying distance, H is the length of the initial spray gun tip from the center of the fixed rod, x is the coordinate value of the spray gun in the axial direction of the elbow, y is the extension distance of the spray gun from the initial gun tip position, G is the advance opening length value of the spray gun in the axial direction of the elbow.

[0051] This embodiment has N groups of spray guns, and the number of spray guns N is adjusted in combination with the pipe diameter D and the spray width K of the spray guns. Specifically:

[0052] N=D*π / K, where D*π / K is rounded up when it is not an integer, and N must be an even number; when the calculated value of N is an odd number, it is necessary to round it up by +1, and select and install the corresponding spray gun group based on the parameter data before corrosion protection.

[0053] The spraying equipment is equipped with a driving device, which enables it to move along the axial direction of the elbow and transmit the moving distance. The moving direction is positioned as the X axis, and the moving distance is zeroed at the axial center of the elbow. The distance data is transmitted to the positive and negative sides respectively, and the length range of the spraying section is X:

[0054] to

[0055] The spraying equipment of this embodiment can realize the automatic adjustment function of each spray gun in the spray gun group to maintain a certain distance from the inner wall of the pipe by program control. The adjustment principle is:

[0056] The spray gun facing the longest side (or the shortest side, in this embodiment, the spray gun facing the long side is used as an example) of the pipe is the first spray gun, and the first, second, third, ..., and third spray guns are arranged gradually toward one side of the two sides. Item, The calculation method is the same as that of the other side. The distance between any n-th spray gun and the pipe fitting at the position x along the axial direction of the elbow is calculated as follows:

[0057]

[0058] Among them, α is the angle between the nth spray gun and the first spray gun.

[0059] When α≤90°, x is in When the value of x in the formula reaches 0, the absolute value is taken, which is a simplified formula:

[0060] Pick

[0061] but

[0062] When α>90°, take β=180°-α, which is a simplified formula:

[0063]

[0064] but

[0065] Wherein, L can be set to a more appropriate fixed value in combination with the anti-corrosion powder process parameters.

[0066] Through the above setting process, the extension length of the gun tip can be adjusted in real time along with the x-coordinate of the axial movement position of the gun tip along the elbow, and the anti-corrosion distance between the gun tip and the inner wall of the elbow is always kept at a suitable L for spraying.

[0067] Each spray gun in the spray gun group of this embodiment has an independent automatic start and stop function, ensuring that the spray gun starts and stops spraying when it enters the critical position of contacting the pipe fitting. Specifically:

[0068] When x is in to When outside the section, all spray guns are closed for spraying. to During the period, the start and stop status of the nth spray gun is:

[0069] The angle between the nth spray gun and the first spray gun state;

[0070] When α≤90°, to simplify the formula:

[0071] Pick

[0072] a=4B 2 *tan 2 α+D2,

[0073]

[0074] To ensure the spraying effect, the advance opening length G is reserved and set, and the opening section is:

[0075] is on when , otherwise it is off.

[0076] When α>90°, take β=180°-α, which is a simplified formula:

[0077] Pick

[0078] a=4B 2 *tan 2 β+D2,

[0079]

[0080] To ensure the spraying effect, the advance opening length G is reserved and set, and the opening section is:

[0081] is on when , otherwise it is off.

[0082] When the angle of the pipe is relatively large, two sets of spraying equipment can be configured to spray anti-corrosion from both ends, and the pipe bracket can be adjusted to a rotatable angle bracket, and the two sets of spraying equipment can spray in turn from each side.

[0083] This embodiment can realize the function of moving along the axial direction of the elbow and the independent radial movement of each spray gun, so that the distance between the spray gun head and the inner wall of the pipe is always consistent, ensuring the stability of the spray wall thickness. This embodiment can realize that the spray gun is turned on when the set distance from the pipe wall is reached, and is turned off when the condition is not met, avoiding ineffective spraying and reducing energy consumption and material waste.

[0084] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An elbow anti-corrosion processing equipment, characterized in that: It includes a spray gun group, which is connected to a moving device through a fixed rod, and the moving device is used to drive the spray gun group to move axially along the pipe fitting; the spray gun group includes multiple spray guns distributed circumferentially along the fixed rod, each spray gun is connected to a linear drive mechanism, and the linear drive mechanism is used to control each spray gun to start and stop independently along the radial direction of the pipe fitting.

2. The elbow anti-corrosion processing equipment according to claim 1 is characterized in that: The moving device and the linear driving mechanism are connected to a control console, and the control console is used to control the movement of each spray gun according to the axial coordinate x value of the spray gun along the pipe.

3. The elbow anti-corrosion processing equipment according to claim 1 or 2, characterized in that: The mobile device comprises a mobile base, and the fixed rod is fixed to the mobile base; The mobile base is also equipped with a storage bin, which is used to provide anti-corrosion powder to the spray gun.

4. The elbow anti-corrosion processing equipment according to claim 1 or 2, characterized in that: The linear drive mechanism comprises a movable slideway and a lead screw and nut mechanism. The spray gun is slidably connected to the movable slideway and is connected to the lead screw and nut mechanism.

5. A control method for elbow anti-corrosion processing equipment according to any one of claims 1 to 4, characterized in that: include: The moving device drives the spray gun group to the set position of the pipe fitting, and the control console outputs two signals to the spray guns that enter the anti-corrosion range of the pipe fitting elbow. One signal controls the spray head to move toward the inner wall of the pipe fitting and keeps the spray gun at a set distance from the inner wall of the pipe fitting; the other signal controls the spray gun to start the spraying function. As the mobile device continues to move and feeds back the travel coordinate signal to the control console, the control console controls the spray gun that moves out of the corrosion prevention range according to the moving position, shuts down the spraying function and retracts the spray gun; when all the nozzles are moved out of the corrosion prevention range, the control console controls the mobile device to return.

6. The control method of an elbow anti-corrosion processing equipment according to claim 5 is characterized in that: The number of spray guns is N, and N satisfies: N=D*π / K, where D is the diameter of the pipe, K is the spraying width, and N is an even number.

7. The control method of an elbow anti-corrosion processing equipment according to claim 5, characterized in that: The moving distance of the moving device is based on the axial center position of the pipe elbow as the zero point, and the distance data is transmitted to the positive and negative sides respectively. The spraying range is: Where R is the elbow turning radius and θ is the elbow angle.

8. The control method of elbow anti-corrosion processing equipment according to claim 5 is characterized in that: The spray gun has an independent automatic adjustment function to maintain a set distance from the inner wall of the pipe; The first spray gun is the one facing the longest or shortest side of the pipe, and the second spray gun is the one facing one of the two sides. The data on the other side is symmetrical with that on this side; The distance between the nth spray gun and the pipe fitting at position x along the axial direction of the elbow is: Among them, α is the angle between the nth spray gun and the first spray gun, N is the number of spray guns, R is the elbow turning radius, θ is the elbow angle, and D is the pipe diameter.

9. The control method of elbow anti-corrosion processing equipment according to claim 8, characterized in that: When α≤90°, the distance y from the initial gun tip position to the spray gun is expressed as: When α>90°, β=180°-α, in, Wherein, H represents the initial length of the spray gun tip from the center of the fixed rod, and L represents the spraying distance.

10. The control method of elbow anti-corrosion processing equipment according to claim 5, characterized in that: The spray gun has an independent automatic start and stop function, so as to start and stop spraying when the spray gun enters the critical position of contacting the pipe; Each spray gun is reserved with an advance opening length G.

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