Elbow anticorrosion processing equipment and method

Abstract

The application discloses a bend anticorrosion processing device and method, and relates to the technical field of pipe fitting anticorrosion, which comprises a spray gun group, the spray gun group is connected with a moving device through a fixing rod, and the moving device is used for driving the spray gun group to move along the axial direction of a pipe fitting; the spray gun group comprises a plurality of spray guns which are distributed along the circumferential direction of the fixing rod, each spray gun is connected with a linear driving mechanism, and the linear driving mechanism is used for controlling each spray gun to independently start and stop along the radial direction of the pipe fitting. The spray gun group has the axial movement function along the pipe fitting, simultaneously has the movement and adjustment function along the radial direction of the bend, realizes the spraying of the bend, and the spraying thickness is stable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipe anticorrosion, in particular to a bend anticorrosion processing equipment and method. BACKGROUND

[0002] Because the bend pipe has a bending degree, if the conventional anticorrosion methods such as straight-line spraying and rolling are used for anticorrosion, the coating thickness on the inner wall after anticorrosion will be seriously uneven, the local coating will be too thick to meet the anticorrosion peeling strength, the appearance will have serious orange peel phenomenon, and the coating will be too thin or exposed to fail to meet the coating thickness requirement. Some automatic spraying equipment is disclosed in the prior art, for example:

[0003] A steel pipe inner and outer anticorrosion spraying machine is disclosed in Chinese utility model patent CN217594945U, which comprises a steel pipe body, an outer spraying ring is sleeved outside the steel pipe body, an inner spraying ring is sleeved inside the steel pipe body, and the inner spraying ring and the outer spraying ring are synchronously sprayed through the cooperation between the steel pipe body, the inner spraying ring, the outer spraying ring and a synchronous device. A pipe wall spraying equipment is disclosed in Chinese invention patent CN116532285A, which comprises a pipe, clamping and fixing assemblies arranged at both ends of the pipe, and a moving spraying assembly arranged in the inner cavity of the pipe. The moving spraying assembly comprises a coating liquid cavity, a connecting pipe and a spray head. The distance between the spray head and the inner wall of the pipe is adjusted by a spraying radius adjusting assembly to spray pipes with different diameters. Although the above-mentioned scheme can realize spraying on the inner wall of the pipe, the spray head is synchronously controlled and is not suitable for the bend structure. SUMMARY

[0004] In view of the deficiencies of the prior art, the purpose of the present application is to provide a bend anticorrosion processing equipment and method. The spray gun group has the function of moving along the axial direction of the pipe, and also has the function of moving and adjusting independently along the radial direction of the bend, realizes spraying on the bend, and the spraying thickness is stable.

[0005] In order to achieve the above-mentioned purpose, the present application is realized by the following technical scheme:

[0006] In a first aspect, the embodiments of the present application provide a bend anticorrosion processing equipment, which comprises a spray gun group, the spray gun group is connected with a moving device through a fixing rod, the moving device is used to drive the spray gun group to move along the axial direction of the pipe; the spray gun group comprises a plurality of spray guns which are distributed along the circumferential direction of the fixing rod, each spray gun is connected with a linear driving mechanism, and the linear driving mechanism is used to control each spray gun to start and stop independently along the radial direction of the pipe.

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

[0008] As a further implementation manner, the mobile device comprises a mobile base, and the fixed rod is fixed to the mobile base.

[0009] The mobile base is further provided with a storage bin for providing the spray gun with anticorrosive powder.

[0010] As a further implementation manner, the linear driving mechanism comprises a mobile slide and a screw nut mechanism, and the spray gun is slidably connected to the mobile slide and connected to the screw nut mechanism.

[0011] In a second aspect, the embodiments of the present application further provide a control method of the elbow anticorrosion processing equipment, comprising:

[0012] The mobile device drives the spray gun group to enter the pipe fitting setting position, and the console outputs two signals to the spray guns entering the anticorrosion range of the pipe fitting elbow, one of which is to control the spray head to move towards the inner wall of the pipe fitting and keep a set distance between the spray gun and the inner wall of the pipe fitting, and the other is to control the spray gun to open the spraying function.

[0013] With the continuous movement of the mobile device, the travel coordinate signal is fed back to the console, and the console controls the spray guns out of the anticorrosion range to close the spraying function and retract the spray guns according to the movement position; when all the spray heads move out of the anticorrosion range, the console controls the mobile device to return.

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

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

[0016] As a further implementation manner, the movement distance of the mobile device takes the axial center position of the elbow as zero point, and the distance data is transmitted to both sides as positive and negative respectively, and the spraying range is:

[0017] Wherein, R is the turning radius of the elbow, and θ is the elbow angle.

[0018] As a further implementation manner, the spray gun has an independent automatic adjustment function of keeping a set distance from the inner wall of the pipe fitting.

[0019] The spray gun opposite to the longest side or the shortest side of the pipe fitting is the first spray gun, and the spray guns on one side are sequentially numbered as the first spray gun to the first spray gun, and the data on the other side is symmetrical to the data on the side.

[0020] The distance of the n-th spray gun from the pipe fitting at the position x in the axial direction of the elbow is:

[0021] ​

[0022] Wherein, a is the angle between the n-th spray gun and the first spray gun, N is the number of spray guns, R is the bend radius, θ is the bend angle, and D is the pipe diameter.

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

[0024]

[0025] When a>90°, β=180°-a,

[0026]

[0027] Wherein,

[0028] Wherein, H represents the length of the initial spray gun head 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-stop function to start and stop spraying when the spray gun enters the pipe contact critical position;

[0030] Each spray gun is provided with an advanced start length G.

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

[0032] On the basis of the linear displacement of the spray gun group of the spraying equipment along the average axis of the bend, on the one hand, axial movement along the pipe from one end to the other end can be achieved, and on the other hand, each spray gun has an independent radial movement adjustment function along the bend, so that the gun head of each spray gun is always kept within the distance segment from the pipe wall that meets the requirements of the corrosion prevention process. In addition, due to the bend of the bend, the length of the bend in the projection direction along the average axis of the bend is not the same. In order to avoid waste of corrosion powder when the spray gun sprays without a pipe, each spray gun of the present application combines its own position and the state of the pipe to realize the independent automatic start-stop function of the spray gun. BRIEF DESCRIPTION OF DRAWINGS

[0033] The drawings accompanying the specification constitute part of this application and illustrate one or more embodiments of the application (including its best mode(s)) and together with the description, serve to explain and illustrate the claimed applications.

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

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

[0036] Fig. 3is a schematic diagram of a spray gun set structure according to one or more embodiments of the present application.

[0037] Wherein, 1, control console, 2, moving device, 2-1, roller, 2-2, storage bin, 2-3, fixed rod, 3, spray gun set, 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 description is exemplary and is intended to provide further explanation of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0039] Example one:

[0040] The present embodiment provides an elbow anti-corrosion processing equipment, as shown in Figs. 1-3 , comprising a spray gun set 3, a moving device 2 and a control console 1, the spray gun set 3 is installed on the moving device 2, and the spraying action of the spray gun 3-2 is realized under the control of the control console 1.

[0041] In this embodiment, as shown in Fig. 2 , the moving device 2 comprises a moving base and a storage bin 2-2, the moving base realizes movement through the roller 2-1 controlled by a servo motor; the storage bin 2-2 is installed on the upper side of the moving base, used for storing anti-corrosion powder, and delivering the anti-corrosion powder to the spray gun 3-2 through a pneumatic mode. The upper side of the moving base is installed with a fixed rod 2-3 through a support seat, the fixed rod 2-3 is arranged along the horizontal direction, and the spray gun set 3 is installed at the end of the fixed rod 2-3.

[0042] The spray gun set 3 comprises a plurality of spray guns 3-2, as shown in Fig. 3 , the plurality of spray guns 3-2 are uniformly distributed along the ring direction of the fixed rod 2-3, each spray gun 3-2 is respectively connected with a linear drive mechanism, and the individual action of each spray gun 3-2 is realized through the linear drive mechanism. In this embodiment, the linear drive mechanism comprises a screw nut mechanism 3-1 and a moving slide 3-3, the moving 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 slidingly connected with the moving slide 3-3, and the spray gun 3-2 is fixedly connected with the nut in the screw nut mechanism 3-1, the spray gun 3-2 can move along the moving slide 3-3 under the action of the screw nut mechanism 3-1, so as to change the distance between the spray gun 3-2 and the inner wall of the pipe body.

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

[0044] The working principle of the embodiment is as follows:

[0045] When the anticorrosion elbow 4 is placed on the fixing frame, the elbow 4 and the fixing frame are fixed relative to the moving device 2 in combination with the corresponding parameters; during operation, the control console 1 sends a running signal to the moving device 2, the servo motor and the roller 2-1 start running after receiving the signal, and feed back the corresponding running 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. When the spray gun group 3 enters the pipe pre-operation range, the control console 1 outputs two signals to the spray gun 3-2 that has entered the anticorrosion range of the inner wall of the elbow 4; one of the signals is sent to the lead screw nut mechanism 3-1, which drives the spray gun 3-2 to move towards 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; the other signal is sent to the spray gun 3-2 that has entered the anticorrosion range of the inner wall of the elbow 4, which opens the spraying function after receiving the signal, and sprays the anticorrosion powder from the storage bin 2-2 through the pneumatic conveying pipeline to the elbow 4 pipe for anticorrosion work.

[0046] With the continuous movement of the moving device 2, the servo motor and the roller 2-1 feed back the running coordinate signals to the control console 1 in real time, and the control console 1 automatically calculates the data according to the moving position, sends signals to the spray guns 3-2 that have moved out of the anticorrosion range of the inner wall of the elbow 4 to close the spraying and retract the spray guns, and when the control console 1 receives the feedback that all the spray guns 3-2 have moved out of the pipe spraying range from the servo motor and the roller 2-1, the control console 1 sends a signal to the servo motor and the roller 2-1 to stop running and return, and the moving device 2 is reset after receiving the signal, until it runs to the initial point to complete one processing cycle.

[0047] The spray guns 3-2 of the embodiment can be controlled individually, and a certain number of spray guns 3-2 can be kept at a certain distance for elbow spraying; the spray guns 3-2 have the functions of moving along the axis of the elbow 4 and moving independently along the radial direction, 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 spraying wall thickness.

[0048] Embodiment two:

[0049] The embodiment provides a control method of an elbow anticorrosion processing equipment, which is based on the elbow anticorrosion processing equipment of embodiment one, controls the extension length of each spray gun in the spray gun group and the start-stop action of the spray gun by combining the x value control equipment of the spray gun along the axial coordinate of the pipe, and sets product parameters according to the actual processing product, which 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 spraying gun head distance from the center of the fixed rod, x is the coordinate value of the spraying gun in the axial direction of the elbow, y is the distance of the spraying gun from the initial gun head position, G is the length value of the spraying gun in the axial direction of the elbow.

[0051] The embodiment has N groups of spraying guns, and the number of spraying guns N is adjusted in combination with the pipe diameter D and the spraying gun spraying width K, specifically:

[0052] N = D * π / K, wherein D * π / K is rounded up when it is not an integer, and N needs to be an even number; when the calculated N value is odd, +1 is taken to be even, and the corresponding selection and installation of the spraying gun group are performed in combination with the parameter data before corrosion prevention.

[0053] The spraying equipment is installed with a driving device, which has the functions of moving along the axial direction of the elbow and transmitting the moving distance, wherein the moving direction is positioned as the X axis, and the moving distance is taken as zero at the center position of the axial direction of the elbow, and the distance data is transmitted to both sides with one positive and one negative, wherein the spraying section length range is X:

[0054] to

[0055] The spraying equipment of the embodiment can realize the automatic adjustment function of each spraying gun in the spraying gun group maintaining a certain distance from the inner wall of the pipe through program control, and the adjustment principle is:

[0056] The spraying gun opposite to the longest side of the pipe (or the shortest side, and the embodiment is described by taking the longest side as an example) is the first spraying gun, and the spraying guns gradually sorted to one side of the two sides are the first, second, third, …, Nth, and the other side is symmetrical with the data calculation data on this side, and the calculation method is the same. The distance between any nth spraying gun and the pipe at position x in the axial direction of the elbow is calculated as follows:

[0057]

[0058] Wherein, α is the included angle between the nth spraying gun and the first spraying gun.

[0059] When α ≤ 90°, x is in to 0, the absolute value of x in the formula is taken, and the formula is simplified as:

[0060]

[0061] Then

[0062] When α > 90°, take β = 180° - α, and the formula is simplified as:​​​

[0063]

[0064] but

[0065] Among them, L can be set to a suitable fixed value based on the anti-corrosion powder process parameters.

[0066] The above setting process allows for real-time adjustment of the gun tip extension length according to the x-coordinate of the gun tip's position along the elbow's axial direction, ensuring that the gun tip is always at a suitable distance (L) from the inner wall of the elbow for anti-corrosion spraying.

[0067] In this embodiment, each spray gun in the spray gun assembly has an independent automatic start-stop function, ensuring that spraying starts and stops when the spray gun enters the critical contact position of the pipe fitting. Specifically:

[0068] When x is in to All spray guns should be turned off when outside the designated area, and spraying should continue until the area is reached. to During this period, the start / 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°, the formula is simplified as follows:

[0071] Pick

[0072] a = 4B 2 *tan 2 α+D2,

[0073]

[0074] To ensure the coating effect, a pre-opening length G is reserved, so the opening segment is:

[0075] Turn it on when needed, otherwise turn it off.

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

[0077] Pick

[0078] a = 4B 2 *tan 2 β+D2,

[0079]

[0080] To ensure the coating effect, a pre-opening length G is reserved, so the opening segment is:

[0081] Turn it on when needed, otherwise turn it off.

[0082] When the pipe fitting angle is relatively large, two sets of spraying equipment can be configured to spray anti-corrosion from both ends, and the pipe fitting support can be adjusted to a rotatable support, with the two sets of spraying equipment spraying the sides sequentially.

[0083] This embodiment enables movement along the axial direction of the elbow and independent radial movement of each spray gun, ensuring that the distance between the spray gun head and the inner wall of the pipe remains consistent and guaranteeing stable coating thickness. This embodiment also allows the spray gun to open when it reaches a set distance from the pipe wall and close when the condition is not met, avoiding ineffective spraying and reducing energy consumption and material waste.

[0084] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A control method of a bend anticorrosion processing apparatus, characterized by, The elbow anticorrosion processing device comprises a spray gun group, a moving device connected to the spray gun group through a fixing rod, and the moving device is used to drive the spray gun group to move along the axial direction of the pipe; the spray gun group comprises a plurality of spray guns distributed along the fixing rod in a ring shape, and each spray gun is connected to a linear driving mechanism, which is used to control the independent start and stop of each spray gun along the radial direction of the pipe; The moving device drives the spray gun group to enter the pipe at a set position, and the console outputs two signals to a plurality of spray guns in the anticorrosion range of the elbow of the pipe, one of which is to control the spray head to move towards the inner wall of the pipe and keep the spray gun at a set distance from the inner wall of the pipe; the other signal is to control the spray gun to open the spraying function; With the continuous movement of the moving device, the travel coordinate signal is fed back to the console, and the console controls the spray guns in the anticorrosion range to close the spraying function and retract the spray guns according to the moving position; when all the spray heads move out of the anticorrosion range, the console controls the moving device to return; The number of the spray guns is N, and N satisfies: where D is the pipe diameter, K is the spray width, and N is an even number. The moving distance of the mobile device takes the axial center position of the pipe elbow as zero point, and respectively transmits distance data to two sides as positive and negative, and the spraying range is: Wherein, R is the elbow turning radius, and θ is the elbow angle; The spray gun has an independent automatic adjustment function of keeping a set distance from the inner wall of the pipe; The spray gun facing the longest or shortest side of the pipe fitting is designated as the first spray gun, and the spray guns are sequentially numbered from the first to the ( ) on either side. ) piece, the other side is symmetrical to this side; When the nth spray gun is at a position x along the axial direction of the elbow, the range is: Wherein, α is the included 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 diameter of the pipe; When α≤90°, the extension distance y of the spray gun from the initial gun head position is represented as: When α>90°, β=180°-α, wherein Wherein, H represents the length of the initial spray gun head from the center of the fixing rod, and L represents the spraying distance.

2. The control method of a corrosion prevention processing apparatus for an elbow according to claim 1, characterized by, The moving device and the linear driving mechanism are connected to the console, and the console is used to control the action of each spray gun according to the axial coordinate x value of the spray gun along the pipe.

3. The control method of a corrosion-preventing processing apparatus for an elbow according to claim 1 or 2, characterized by, The moving device comprises a moving base, and the fixing rod is fixed to the moving base; The moving base is also provided with a storage bin, which is used to provide anticorrosion powder to the spray gun.

4. The control method of a corrosion-preventing processing apparatus for an elbow according to claim 1 or 2, characterized by, The linear driving mechanism comprises a moving slide and a screw nut mechanism, the spray gun is slidingly connected to the moving slide and connected to the screw nut mechanism.

5. The control method of a corrosion-preventing processing apparatus for an elbow according to claim 1, characterized by, The spray gun has an independent automatic start and stop function to start and stop spraying when the spray gun enters the pipe and contacts the critical position; Each spray gun is provided with an advance start length G.

Images