CN114472030A

CN114472030A - Circular bend inner wall spraying machine, dust-fog-proof spraying device and spraying method

Info

Publication number: CN114472030A
Application number: CN202111644472.7A
Authority: CN
Inventors: 不公告发明人
Original assignee: Dongying Shenghan Automation Technology Co ltd
Current assignee: Dongying Shenghan Automation Technology Co ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-05-13

Abstract

The invention discloses the technical field of spraying of round bent pipes, and provides a spraying machine and a spraying method for the inner wall of a round bent pipe, wherein a rotary table is arranged at the center of a base of the spraying machine, and a clamping assembly is arranged on the outer side of the rotary table and used for supporting and positioning the round bent pipe to be sprayed; the spraying assembly comprises a radial supporting arm, an arc-shaped supporting arm, a spraying head and a coating delivery pump, the arc-shaped supporting arm is connected to the rotary table through the radial supporting arm and is coaxially arranged with the rotary table, and the spraying head is arranged at the front end of the arc-shaped supporting arm; the circular return bend inner wall flush coater that provides, the revolving stage passes through rotary mechanism drive and circumferential direction, drives the shower nozzle through the arc support arm and advances along the center axis of circular return bend, with the even spraying of coating to circular return bend spare inner wall, spraying control is accurate, efficient to whole circular return bend spare inner wall spraying many times that reciprocates can be accomplished to single clamping, need not be with the help of supplementary guide part, is suitable for circular return bend batch spraying operation.

Description

Circular bend inner wall spraying machine, dust-fog-proof spraying device and spraying method

Technical Field

The utility model relates to the technical field of circular elbow fitting spraying, and provides an automatic device for spraying a circular elbow with a circular cross section and a central axis along the trend of an arc line, and provides an inner wall spraying method of the circular elbow in a fixed state.

Background

After the round bent pipe fitting is machined and formed, the surface of the inner wall of the round bent pipe fitting is sprayed with the anticorrosive coating, so that the corrosion resistance can be improved, and the effective service time of the pipeline can be prolonged. The manual spraying mode is high in labor intensity and low in efficiency, and the spraying quality is difficult to guarantee. In the aspect of the automatic spraying of circular elbow spare, some patent applications relate to return bend inner wall spraying technique, mainly include two kinds of schemes, respectively have some technical problem, specifically as follows:

according to the first scheme, the bent pipe is driven to rotate around the linear central shaft at one end in the circumferential direction through the clamp, and the spray head is driven to move linearly through the linear motion mechanism to move forwards to the inner spraying of the bent pipe in a rotating state. For example, in the patent application "an anticorrosive spraying device for inner layer of elbow" (application number CN 201920916833.0), the spraying machine is fixed, and the elbow seat is rotated to drive the elbow to rotate, so as to realize anticorrosive spraying of the nozzle in the elbow. The first solution has the following disadvantages: (1) because the linear advancing direction of the nozzle is not consistent with the bending direction of the bent pipe, the spray head assembly is difficult to deeply advance into the bent pipe, the single clamping and spraying is difficult to achieve full coverage, the workload of multiple clamping is large, and the spraying efficiency is low; (2) the nozzle moves linearly to enter the circular bent pipe fitting, and the spray head cannot be kept centered in the circular bent pipe fitting during moving, so that the problem of uneven spraying is caused.

According to the second scheme, the spray head is installed at the front end of the travelling trolley, the rear end of the travelling trolley is connected with the coating conveying hose, the travelling trolley crawls along the inner cavity of the elbow, and the spray head sprays the inner wall. For example, the patent application "a heavy-calibre return bend internal coating equipment" (application number CN 201520846513.4), including walking dolly and actuating mechanism thereof, the spray gun of spraying device sets up on walking dolly, utilizes the anti-overturning wheel on the gyro wheel can automatically regulated walking dolly self balance in the inside walking process of return bend, and the walking dolly utilizes spraying device to realize the coating spraying of return bend inner wall in the operation process. The second solution has the following disadvantages: (1) the sprayer is driven to move in a mode that the moving trolley creeps along the curved pipeline, and the moving trolley is easy to slip relative to the inner wall in the crawling process, so that the speed of the sprayer is difficult to accurately control, and the spraying is not uniform; (2) the wheels of the travelling trolley are in contact with the inner wall of the pipeline, and if the travelling trolley does reciprocating motion for multiple times of spraying, the wheels can crush and damage a just finished spraying layer, so that the travelling trolley is not suitable for the requirements of a single-clamping multiple-time spraying process.

Disclosure of Invention

In order to solve the technical problems, the present disclosure provides a circular elbow inner wall spraying machine and a spraying method, so as to keep the spraying head moving along the arc central axis and the spraying head and the supporting component not contacting with the inner wall of the circular elbow during the spraying process, thereby achieving the purposes of improving the spraying quality and efficiency and completing the repeated spraying of the inner wall of the length of the whole circular elbow by single clamping.

On the one hand, the utility model provides a circular return bend inner wall flush coater, technical scheme is: the rotary table spraying device comprises a rotary table, a clamping assembly, a spraying assembly and a control assembly, wherein the rotary table is arranged on a base, a central rotating shaft is vertically arranged, and the base is provided with a rotating mechanism for driving the rotary table to rotate circumferentially; the clamping assembly is arranged on the outer side of the rotary table and comprises an inner seat body and an outer seat body which are oppositely arranged along the radial direction; the inner seat body is fixed on the base, the outer seat body is arranged on a radial guide rail of the base in a sliding mode and is in driving connection with the clamping mechanism, and the circular bent pipe is supported and positioned through the inner seat body and the outer seat body, so that the circular bent pipe and the rotary table are arranged coaxially; the spraying assembly comprises a radial supporting arm, an arc supporting arm, a spraying head and a coating delivery pump, wherein the curvature radius of the arc supporting arm is equal to that of a circular elbow piece to be sprayed, the rear end of the arc supporting arm is connected to the rotary table through the prize supporting arm, the spraying head is arranged at the front end of the arc supporting arm and comprises a plurality of nozzles which are annularly arranged, and the coating delivery pump is communicated with the spraying head through the arc supporting arm in a fluid mode; the control assembly comprises a controller in signal connection with the rotating mechanism and the clamping mechanism and configured to: the rotating mechanism is controlled to drive the rotary table to rotate circumferentially, and the clamping mechanism is controlled to drive the outer seat body to move radially.

Furthermore, in order to realize that a connecting pipeline of the coating delivery pump and the spraying head is suitable for the structural shape of the inner wall of the circular elbow and avoid the contact of the connecting pipeline and the inner cavity of the circular elbow, the coating delivery pump is communicated with the spraying head through an arc-shaped supporting arm in a fluid mode, the arc-shaped supporting arm is of an axial hollow structure, the output end of the coating delivery pump is communicated with the rear end of the axial hollow structure in a fluid mode, and the spraying head is communicated with the front end of the axial hollow structure in a fluid mode.

Further, in order to be suitable for the structural shape of the inner wall of the circular elbow and increase the spraying uniformity, the spraying head comprises a bent cylindrical shell which is arranged in the radial surface of the front end of the arc-shaped supporting arm and has an outer diameter smaller than the inner diameter of the circular elbow, and a plurality of nozzles are annularly arranged on the outer periphery of the bent cylindrical shell.

Furthermore, in order to enable the inner base body to be suitable for the shape of the inner side and the top of the outer surface of the circular bent pipe and realize the static rear positioning of the circular bent pipe, the inner base body is provided with an inner supporting part and a pressing part, the inner supporting part is a first arc structure which is arranged on the outer side of the inner base body and matched with the inner arc surface of the circular bent pipe, and the positioning part is a second arc structure which is arranged on the top of the front side of the first arc structure and matched with the arc surface of the top of the circular bent pipe.

Further, in order to make the outer base body be suitable for the outer side of the outer surface of the circular elbow and the bottom shape, realize that the moving process of the circular elbow bears the weight of the location, the outer base body is provided with an outer supporting part and a supporting part, the outer supporting part is a third arc structure which is arranged on the inner side of the outer base body and matched with the arc surface on the outer side of the circular elbow, and the supporting part is a fourth arc structure which is arranged on the bottom of the front side of the third arc structure and matched with the arc surface on the bottom of the circular elbow.

Furthermore, in order to realize that the clamping mechanism applies moderate force to the outer base body and prevent the outer base body and the inner base body from damaging the round elbow pipe fitting due to overlarge clamping force on the elbow pipe, the clamping mechanism comprises a clamping linear cylinder and a pressure sensor, the clamping linear cylinder is arranged along the direction of the radial guide rail, a cylinder body of the clamping linear cylinder is connected with the base, a piston rod is connected with the outer base body, and the pressure sensor is arranged on an inner supporting part on the inner base body through a spring part.

On the other hand, on the circular return bend inner wall flush coater basis that provides, in order to adapt to circular return bend front end open-ended shape and angle, realize the front end opening shutoff of circular return bend among the spraying process, prevent that dust and fog from being excessive by the front end opening among the spraying process, this disclosure provides an excessive circular return bend inner wall spraying equipment of dust and fog, its technical scheme is: the spraying machine comprises the spraying machine for the inner wall of the circular bent pipe and a front dust and mist baffle plate, wherein the front dust and mist baffle plate is arranged on the arc-shaped supporting arm in a sliding manner and is positioned at the rear side of the spraying head so as to be buckled at an opening at the front end of the circular bent pipe fitting through the driving of the arc-shaped supporting arm; the dust collector is characterized by further comprising a rear dust fog baffle, wherein the rear dust fog baffle is slidably arranged on the base and can be opened and closed with the rear end of the round bent pipe fitting.

Furthermore, in order to adapt to the shape and the angle of the rear end opening of the round bent pipe fitting, the rear end opening of the round bent pipe fitting is plugged in the spraying process, dust mist is prevented from overflowing from the rear end opening in the spraying process, the base is provided with an arc-shaped guide rail taking the rotary table as the center, and the movable rear dust mist baffle is arranged on the base in a sliding mode.

Further, in order to realize back dirt fog baffle lock to circular elbow fitting back end opening, leave circular elbow fitting rear end opening, still include base still lock mechanism, lock mechanism includes the linear jar of lock, preceding articulated seat and the articulated seat in back, preceding articulated seat is connected with back dirt fog baffle through the preceding hinge of vertical pivot, the articulated seat in back is connected with the base through the back hinge of vertical pivot, the linear jar setting of lock is between articulated seat in the front and the articulated seat in back to it slides along arc guide to promote back dirt fog baffle.

On the other hand, the invention provides a method for spraying the inner wall of the circular bent pipe for multiple times by single clamping, which uses the circular bent pipe inner wall spraying machine, and comprises the following steps:

first, the round pipe-bending part is moved inward and positioned

Placing the circular bent pipe fitting on an outer seat body of the clamping assembly, driving the outer seat body and the circular bent pipe fitting on the outer seat body to move inwards by a radial driving mechanism, and jointly supporting and positioning the circular bent pipe fitting by the inner seat body and the outer seat body so that an arc central axis of the circular bent pipe fitting is superposed with an arc central axis of the arc supporting arm;

second, forward spraying

The rotary driving mechanism drives the rotary table to rotate in the forward direction, the rotary table drives the spraying head to enter the circular bent pipe fitting from the front end opening through the radial supporting arm and the arc supporting arm, and the spraying head sprays the inner wall of the circular bent pipe fitting in the process of moving in the forward direction along the central axis of the arc line until the spraying head moves to the rear end of the circular bent pipe fitting;

third, reverse spraying

The rotary driving mechanism drives the rotary table to rotate reversely, the rotary table drives the spraying head to rotate reversely through the radial supporting arm and the arc supporting arm, and the spraying head sprays on the inner wall of the circular bent pipe fitting in the process of moving forwards along the arc central axis until the spraying head moves to the front end of the circular bent pipe fitting;

repeating the second step and the third step, driving the spraying head to move forwards and backwards for multiple times, and spraying the inner wall of the circular bent pipe fitting for multiple times;

(4) the circular bent pipe fitting is moved outwards and taken down

The radial driving mechanism drives the outer seat body to move outwards, the round bent pipe fitting moves outwards along with the outer seat body, and the round bent pipe fitting on the outer seat body is taken down.

The technical advantages of the application are mainly reflected in:

the flush coater that provides is through the circular elbow pipe fitting centre gripping location of centre gripping subassembly to needs spraying for the arc center pin of circular elbow pipe fitting and the arc center pin coincidence of arc support arm, revolving stage drive arc support arm rotate, drive the arc center pin of shower head along circular elbow pipe fitting and advance, to circular elbow pipe fitting inner wall spraying operation. In a first aspect: in the spraying process, the spraying head is driven by the rotary table and the arc-shaped supporting arm to move along the arc-shaped central shaft of the round bent pipe fitting at a constant speed, can extend into the whole length of the bent pipe with a larger radian, and is suitable for completing the spraying of the inner wall of the round bent pipe fitting by single clamping; in a second aspect: the distances from the spraying heads to the peripheral pipe walls are equal, the travelling speed of the spraying heads is controlled by the rotary table to be stable and accurate, and the spraying uniformity is improved; in a third aspect: in the spraying process, the spraying head and the arc-shaped supporting arm are not in contact with the inner wall of the round bent pipe fitting, so that the pollution to the inner wall of the round bent pipe fitting is avoided, the spraying head is suitable for reciprocating motion to spray the inner wall of the round bent pipe fitting for multiple times, the technological requirement of multiple spraying by single clamping is met, and an auxiliary supporting part is not required to be connected outside the round bent pipe fitting during spraying; in a fourth aspect: the inner seat body and the outer seat body are arranged to clamp the round bent pipe fitting, the position of the bent pipe fitting is kept fixed and the bent pipe fitting is coaxial with the rotary table in the spraying process, the round bent pipe fitting is driven to move radially through the outer seat body before and after clamping, and the round bent pipe fitting is convenient to put in and take out and is particularly suitable for bent pipe fittings with large weight and large size.

The spraying machine has the advantages that the circular bent pipe fitting is convenient to clamp, the spraying head keeps the center of the section of the circular bent pipe fitting to move forward and uniform in spraying in the whole spraying process, multiple times of reciprocating spraying of the inner wall can be completed through single clamping, the spraying quality is good, and the spraying machine is suitable for inner wall spraying operation on occasions where the circular bent pipe fittings are produced in batches.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a circular elbow inner wall coating machine provided by the present disclosure.

Fig. 2 is a schematic structural view of the clamping assembly.

Fig. 3 is a schematic structural view of the spray assembly.

Fig. 4 is a schematic structural view of the spray head.

Fig. 5 is a schematic view of the state at the start of spraying.

Fig. 6 is a schematic view of the state when the painting is completed.

Fig. 7 is a schematic structural diagram of the circular elbow inner wall spraying device for preventing dust mist from overflowing provided by the present disclosure.

Fig. 8 is a radial cross-sectional view of the spray head of fig. 7.

Fig. 9 is a schematic view of the spray head just beginning to enter the circular bend.

Fig. 10 is a schematic view of the spray head after moving a distance within the circular elbow.

Fig. 11 is a schematic diagram showing a state before spraying of the inner wall spraying apparatus for a circular elbow in which dust mist overflows.

Fig. 12 is a schematic view of the inner wall of the circular elbow pipe with the dust mist overflowing during the spraying process.

Fig. 13 is a view showing an automatic coating system for the inner surface of a circular pipe bender.

Fig. 14 is a schematic structural view of a front dust barrier provided with a front sensor.

Fig. 15 is a schematic structural view of a rear dust mist barrier provided with a rear sensor.

In the figure, 1-base, 11-radial guide rail, 12-arc guide rail, 2-turntable, 31-inner base, 311-first arc structure, 312-second arc structure, 32-outer base, 321-third arc structure, 322-fourth arc structure, 33-clamping linear cylinder, 4-radial support arm, 5-arc support arm, 6-spraying head, 7-front dust baffle, 71-reset spring, 710-front sensor, 8-rear dust baffle, 810-rear sensor, 81-buckling linear cylinder, 82-rear hinged base, 83-front hinged base, 84-arc slide base, 9-round elbow component.

Detailed Description

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more readily understood by those skilled in the art.

Fig. 1 is a schematic structural diagram of a circular elbow inner wall coating machine provided by the present disclosure. As shown in fig. 1, in the circular elbow inner wall coating machine provided by the present application, a base 1 is fixedly arranged on the ground, a turntable 2 is installed above the base 1, and a central rotating shaft is arranged along the vertical direction, and the base 1 is provided with a rotation driving mechanism for driving the turntable 2 to rotate circumferentially. In the specific implementation, the rotary driving mechanism adopts a motor, the motor is installed at the bottom of the base 1 and is in transmission connection with the rotary table 2, the rotary table 2 is driven to rotate through the motor, and the motor is connected with the controller so as to realize the control of the rotary start, stop, speed and forward and reverse rotation of the rotary table 2.

Fig. 2 is a schematic structural view of the clamping assembly. As shown in fig. 2, the clamping assembly is disposed outside the turntable 2, and includes an inner seat 31 and an outer seat 32 disposed opposite to each other in a radial direction; the inner seat body 31 is fixed on the base 1, the outer seat body 32 is arranged on the radial guide rail of the base 1 in a sliding way and is connected with the clamping mechanism,

in a specific implementation, the clamping mechanism is a clamping linear cylinder 33 arranged along the radial direction of the turntable 2, and the outer seat body 32 is driven by the clamping linear cylinder 33 to move inwards, so that the outer seat body 32 and the inner seat body 31 jointly support and position the circular elbow piece 9. The clamping linear cylinder 33 is an electric push rod or a linear motor, the controller is in signal connection with a special regulator of the electric push rod or the linear motor, the controller sends an instruction to the special regulator, and the special regulator controls the action of a movable rod of the electric push rod or the linear motor.

The outer seat body 32 and the inner seat body 31 are arranged outside the turntable 2 along the radial direction, the circular elbow pipe 9 is supported by the outer supporting part and the supporting part of the outer seat body 32 and the inner supporting part and the pressing part of the inner seat body 31, so that the central axis of the circular elbow pipe 9 coincides with the central axis of the arc-shaped supporting arm 5, and the arc-shaped supporting arm 5 drives the spraying head 6 to move along the arc-shaped central axis of the circular elbow pipe 9.

Fig. 3 is a schematic structural view of the spray assembly. As shown in fig. 3, the arc support arm 5 of the spray assembly is of an arc elbow structure and the radius of curvature of the arc support arm 5 is equal to the radius of curvature of the elbow piece to be sprayed, the radial rotating arm is arranged along the radial direction of the rotating platform 2 and the rear end is fixedly connected with the rotating platform 2, the arc support arm 5 is arranged in the horizontal plane and the rear end is fixedly connected with the front end of the rotating arm, so that the arc support arm 5 is fixedly connected with the rotating platform 2 coaxially arranged, and the spray head 6 is arranged at the front end of the arc support arm 5.

Fig. 4 is a schematic structural view of the spray head. As shown in fig. 3 and 4, the arc-shaped support arm 5 is an axial hollow structure, the output end of the paint delivery pump is in fluid communication with the rear end of the axial hollow structure of the arc-shaped support arm 5, and the spray head 6 is in fluid communication with the front end of the arc-shaped support arm 5. The spray head 6 includes a cylindrical housing disposed in a radial face of the front end of the arc support arm 5, and a plurality of nozzles are circumferentially disposed on an outer circumference of the cylindrical housing. The above-mentioned structural design of spray head 6, cooperation arc support arm 5, the spraying in-process, spray head 6 passes through the arc support arm 5 drive and removes along the arc center pin in the circular bent pipe spare 9, and each nozzle equidistance is close to circular bent pipe spare 9 inner walls, improves the homogeneity of return bend inner wall spraying.

The control assembly comprises a controller in signal connection with the rotating mechanism and the clamping mechanism and is configured to: the rotating mechanism is controlled to drive the rotary table to rotate circumferentially, and the clamping mechanism is controlled to drive the outer seat body to move radially. In the specific implementation, the controller is a Programmable Logic Controller (PLC) or an industrial personal computer, the controller is in signal connection with a motor of the rotating mechanism and controls the forward and reverse rotation and start and stop of the motor, and the controller is in signal connection with the clamping linear cylinder 33 and controls the stretching of a movable rod of the clamping linear cylinder.

Fig. 5 is a schematic view of the state at the start of spraying. Fig. 6 is a schematic view of the state when the painting is completed. The present disclosure provides a method for spraying the inner wall of a circular elbow for multiple times by single clamping, which uses the spraying machine for the inner wall of the circular elbow of the right, and the steps are described as follows by combining with the figures 1, 2, 3, 4, 5 and 6:

first, the round pipe-bending part is moved inward and positioned

Placing the circular elbow pipe fitting 9 on the outer seat body 32 of the clamping assembly, driving the outer seat body 32 and the circular elbow pipe fitting 9 thereon to move inwards by the radial driving mechanism, and supporting and positioning the circular elbow pipe fitting 9 by the inner seat body 31 and the outer seat body 32 together to ensure that the arc central axis of the circular elbow pipe fitting 9 is superposed with the arc central axis of the arc supporting arm 5;

second, forward spraying

The rotary driving mechanism drives the rotary table 2 to rotate forward, the rotary table 2 drives the spraying head 6 to enter the circular bent pipe fitting 9 from the front end opening through the supporting arm 4 and the arc-shaped supporting arm 5, and the spraying head 6 sprays on the inner wall of the circular bent pipe fitting 9 in the process of moving forward along the arc-shaped central axis until the spraying head 6 moves to the rear end of the circular bent pipe fitting 9;

third, reverse spraying

The rotary driving mechanism drives the rotary table 2 to rotate reversely, the rotary table 2 drives the spraying head 6 to rotate reversely through the supporting arm 4 and the arc-shaped supporting arm 5, and the spraying head 6 sprays on the inner wall of the circular bent pipe fitting 9 in the process of moving forwards along the arc-shaped central shaft until the spraying head 6 moves to the front end of the circular bent pipe fitting 9;

repeating the second step and the third step, driving the spraying head 6 to move forwards and backwards for multiple times, and spraying the inner wall of the circular elbow piece 9 for multiple times;

(4) the circular bent pipe fitting is moved outwards and taken down

The radial driving mechanism drives the outer seat body 32 to move outwards, the round bent pipe fitting 9 moves outwards along with the outer seat body 32, and the round bent pipe fitting 9 on the outer seat body 32 is taken down.

The flush coater that provides is to the 9 centre gripping location of the circular elbow spare that need the spraying through the centre gripping subassembly for the arc center pin of circular elbow spare 9 and the coincidence of the arc center pin of

arc support arm

5, 2 drive arc support arms 5 of revolving stage rotate, drive the arc center pin of shower head 6 along circular elbow spare 9 and advance, to the 9 inner wall spraying operations of circular elbow spare. In the specific implementation process, the circular elbow piece 9 is convenient to clamp, the spraying head 6 keeps the center of the section of the circular elbow piece 9 to move all the time in the whole spraying process, the spraying is uniform, multiple times of reciprocating spraying of the inner wall can be completed through single clamping, the spraying quality is good, and the method is suitable for inner wall spraying operation on the occasion of producing the circular elbow piece 9 in batches.

As some preferred embodiments, the inner seat body 31 is provided with an inner supporting portion and a pressing portion, the inner supporting portion is a first arc structure 311 disposed at the outer side of the inner seat body 31, the first arc structure 311 is provided with an arc-shaped contour matching with the arc surface at the inner side of the circular elbow member 9, the positioning portion is provided at a second arc structure 312 at the top of the front side of the first outer arc structure 311, and the second arc structure 312 is provided with an arc-shaped contour matching with the arc surface at the inner side of the top of the circular elbow member 9. The scheme enables the inner seat body 31 to be suitable for the shape of the inner side and the top of the outer surface of the circular bent pipe and realizes the static rear positioning of the circular bent pipe.

As a preferred embodiment, the outer seat body 32 is provided with an outer supporting portion and a supporting portion, the outer supporting portion is a third arc structure 321 arranged inside the outer seat body 32, the third arc structure 321 is provided with an arc-shaped contour matched with the arc surface outside the circular elbow pipe fitting 9, the supporting portion is a fourth arc structure 322 arranged at the bottom of the front side of the third arc structure 321, and the fourth arc structure 322 is provided with an arc-shaped contour matched with the arc surface at the bottom of the circular elbow pipe fitting 9. The proposal leads the outer seat body 32 to be suitable for the outer side of the outer surface and the bottom shape of the round bent pipe, realizes the bearing and positioning of the round bent pipe in the moving process,

in some preferred embodiments, the clamping mechanism includes a clamping linear cylinder 33 and a sensor, the clamping linear cylinder 33 is disposed along the radial guide rail direction, the cylinder body of the clamping linear cylinder 33 is connected to the base 1, the piston rod is connected to the outer seat body 32, the sensor is disposed on the inner support portion of the inner seat body 31 through a spring member, when the outer seat body 32 moves inward to press the circular pipe member onto the inner seat body 31, the inner seat body 31 generates a reverse force to the circular pipe member, the reverse force is transmitted to the sensor through the outer seat body, the sensor is in signal connection with a controller, and the controller adjusts the acting force of the clamping linear cylinder 33, so that the clamping force detected by the sensor maintains a proper range. The clamping mechanism applies moderate clamping force to the outer seat body 32, and the purpose that the round elbow piece 9 is damaged due to overlarge clamping force of the outer seat body 32 and the inner seat body 31 on the elbow is avoided.

In the spraying process of circular elbow spare 9, the problem that dust and fog spilled over to external environment from the front end opening of circular elbow spare 9, rear end opening appears, causes the problem of surrounding environment pollution, and this application needs the circular elbow spare 9 shape of spraying to exist and is different with straight pipe shape, and characteristics that return bend front end opening and rear end opening place cross-section are not parallel to each other can't use the mechanism that straight line promoted the baffle around the straight pipe spare.

In other embodiments, fig. 7 is a schematic structural diagram of a circular elbow inner wall spraying device for preventing dust mist from overflowing provided by the present disclosure. In order to solve the above technical problems, in other embodiments, as shown in fig. 7, a spraying apparatus for spraying inner wall of a circular elbow is provided, which is improved and optimized based on the spraying apparatus for spraying inner wall of a circular elbow, and has structures suitable for a front opening and a rear opening of a circular elbow 9 to block a front dust-fog baffle 7 and a rear dust-fog baffle 8, which will be described below with reference to the accompanying drawings.

The application provides an excessive circular return bend inner wall spraying equipment of dustproof fog, its technical scheme is: on the basis of the inner wall spraying machine for the circular elbow pipe provided by the first embodiment, the front dust fog baffle 7 is arranged, the front dust fog baffle 7 is slidably arranged on the arc-shaped supporting arm 5 and is positioned at the rear side of the spraying head 6, specifically, the front dust fog baffle 7 is provided with a central bent hole 71, the central bent hole 71 is in sliding fit with the arc-shaped supporting arm 5, and the front dust fog baffle 7 is positioned at the rear side of the spraying head 6 and is buckled at an opening at the front end of the circular elbow pipe fitting 9 through driving of the arc-shaped supporting arm 5; the dust collecting device further comprises a rear dust fog baffle 8, wherein the rear dust fog baffle 8 is arranged on the base 1 in a sliding mode and can be opened and closed with the rear end of the round bent pipe fitting 9.

Fig. 8 is a radial cross-sectional view of the spray head of fig. 7. Fig. 9 is a schematic view of the spray head just beginning to enter the circular bend. Fig. 10 is a schematic view of the spray head after moving a distance within the circular elbow. As shown in the figure, in order to adapt to the shape and the angle of the rear front end opening of the round pipe bending part 9, when the front spraying head 6 sprays inside the round pipe bending part 9, the front dust baffle 7 is stably buckled at the front end opening of the round pipe bending part 9; when preceding spraying head 6 left circular elbow fitting 9, preceding dirt fog baffle 7 leaves the purpose of circular elbow fitting 9 along with arc support arm 5, arc support arm 5 is provided with reset spring 71 that is used for applying elasticity outer thrust to preceding dirt fog baffle 7, reset spring 71 movable sleeve establishes outside arc support arm 5, the rear end is connected with arc support arm 5 rear end, the front end is connected with preceding dirt fog baffle 7, so that spraying head 6 stretches into circular elbow fitting 9 in the back, preceding dirt fog baffle 7 breaks away from and elasticity lock at circular elbow fitting 9 front end with spraying head 6.

Fig. 11 is a schematic diagram showing a state before spraying of the inner wall spraying apparatus for a circular elbow in which dust mist overflows. As shown in fig. 11, in order to adapt to the shape and angle of the rear opening of the circular elbow component 9, the rear opening of the circular elbow component 9 is blocked in the spraying process, and dust mist is prevented from overflowing from the rear opening in the spraying process, the base 1 is provided with an arc-shaped guide rail which takes the turntable 2 as the center, the lower end of the movable rear dust mist baffle 8 is provided with an arc-shaped sliding seat 84, and the arc-shaped sliding seat 84 is slidably arranged on the arc-shaped guide rail 12 of the base 1. Simultaneously, in order to realize back dirt fog baffle 8 lock to circular elbow fitting 9 back end opening, leave circular elbow fitting 9 rear end opening, still include base 1 still lock mechanism, lock mechanism includes the linear jar 81 of lock, preceding articulated seat 83 and back articulated seat 82, preceding articulated seat 83 is connected with back dirt fog baffle 8 through the preceding hinge of vertical pivot, back articulated seat 82 is connected with base 1 through the back hinge of vertical pivot, the linear jar 81 setting of lock is between preceding articulated seat 83 and back articulated seat 82, slide along the arc guide rail in order to promote back dirt fog baffle 8.

Fig. 12 is a schematic view of the inner wall of the circular elbow pipe with the dust mist overflowing during the spraying process. With reference to fig. 7, 8, 9, 10, 11 and 12, the method for spraying the inner wall of the circular elbow pipe for preventing the dust mist from overflowing according to the present embodiment is described:

(1) the circular bent pipe fitting moves inwards and is positioned

Placing the circular elbow pipe fitting 9 on the outer seat body 32 of the clamping assembly, enabling the rear end opening to be close to the rear dust fog baffle 8, driving the outer seat body 32 and the circular elbow pipe fitting 9 on the outer seat body to move inwards by the radial driving mechanism, and enabling the circular elbow pipe fitting 9 to be supported and positioned by the inner seat body 31 and the outer seat body 32 together, so that the arc central axis of the circular elbow pipe fitting 9 is superposed with the arc central axis of the arc supporting arm 5;

(2) preceding dirt fog baffle lock is to circular elbow spare front end opening, and concrete process is:

the rotary driving mechanism drives the rotary table 2 to rotate forward, the arc-shaped supporting arm 5 and the spraying head 6 at the front end are driven to move to the front end of the round bent pipe fitting 9, and the front dust fog baffle 7 is buckled at an opening at the front end of the round bent pipe fitting 9;

simultaneously, back dirt fog baffle lock is to circular elbow spare rear end opening, and concrete process is:

the movable rod of the buckling linear cylinder 81 extends out to drive the arc slide seat 84 to move forwards along the arc guide rail 12, and the rear dust fog baffle plate 8 is pushed to be buckled at the opening at the rear end of the round elbow pipe fitting 9;

(3) the spraying head advances for spraying

The rotary driving mechanism drives the rotary table 2 to continue to rotate forwards, the spraying head 6 is separated from the front dust baffle 7, the coating conveying pump starts to convey coating to the spraying head 6, and the coating is sprayed on the inner wall of the circular bent pipe fitting 9 in the process that the spraying head 6 moves along the central axis of the arc line at a constant speed;

(4) spraying head retreats

The spraying head 6 moves to the rear end of the round elbow pipe fitting 9, the coating conveying pump stops conveying the coating to the spraying head 6, the rotating mechanism drives the arc-shaped supporting arm 5 to rotate reversely around the central rotating shaft of the rotary table 2, and the spraying head 6 at the front end of the arc-shaped supporting arm 5 is driven to move reversely to leave the round elbow pipe fitting 9;

(5) preceding dustproof fog baffle breaks away from circular elbow spare, and concrete process is:

the rotating mechanism drives the rotary table 2 to continue to rotate reversely, and the front dust fog baffle 7 is close to the spraying head 6 under the action of the return spring 71 and leaves the circular elbow piece 9;

simultaneously, back dirt fog baffle breaks away from circular elbow fitting rear end opening, and concrete process is:

the movable rod of the buckling linear cylinder 81 contracts to drive the arc-shaped sliding seat 84 to move backwards along the arc-shaped guide rail 12, and drag the rear dust fog baffle 8 to leave the opening at the rear end of the circular elbow pipe fitting 9;

(6) the circular bent pipe fitting is moved outwards and taken down

In this embodiment, set up preceding dirt fog baffle 7, back dirt fog baffle 8, adapted to the open-ended shape of circular elbow fitting 9 rear end and angle, realize the rear end opening shutoff of spraying in-process circular elbow fitting 9, prevent that spraying in-process dirt fog from overflowing by the rear end opening, have the environmental protection function. Furthermore, in the prior art, air flows at a high speed on the surface of the unhardened coating layer in a manner of sucking and spraying air flow in the inner cavity of the shell through negative pressure, so that the air erodes the surface of the coating layer, and the problem of unsmooth coating layer is easily caused. In the closed space formed by the front dust fog baffle 7, the rear dust fog baffle 8 and the round pipe bending part 9, the air flow is relatively static, the static deposition of the coating layer is facilitated, the surface of the smooth coating layer is formed, and the technical effect of improving the quality of the coating layer is achieved.

In other embodiments, in order to solve the technical problem of automatic spraying of the circular elbow fitting and realize automation of the spraying process of the circular elbow fitting, the embodiment provides an automatic spraying system, and fig. 13 is a structural diagram of the automatic spraying system for the inner surface of the circular elbow fitting.

The automatic spraying system for the inner surface of the round elbow fitting comprises a controller, a front sensor, a rear sensor and a pressure sensor, wherein the controller receives an instruction input by an input port and receives signals of the front sensor, the rear sensor and the pressure sensor, and the controller realizes the following control: (1) transmitting an instruction to a clamping linear cylinder to realize the clamping and positioning of the circular bent pipe fitting to be sprayed; (2) instructions are transmitted to the motor to realize the rotation control of the rotary table, drive the spraying head, realize the movement of the spraying head in the pipe fitting, and drive the rotation of the front dust baffle plate, so that the front spraying baffle plate is buckled with the front end opening of the pipe fitting; (3) transmitting an instruction to the buckling linear cylinder to realize the buckling of the rear spraying baffle plate to the opening at the rear end of the pipe fitting; (4) and sending an instruction to a spraying delivery switch to realize the control of delivering the coating to the spraying head by a spraying delivery pump.

Fig. 14 is a schematic structural view of a front dust barrier provided with a front sensor. As shown in fig. 14, a front sensor 710 is disposed between the spray head 6 and the front dust baffle 7, and the front sensor 710 is in signal connection with a controller for controlling a spray delivery switch, so that when the spray head 6 is separated from the front dust baffle 7, a signal is delivered to the controller through the front sensor to control the spray delivery switch to be turned on, and spraying is started.

Fig. 15 is a schematic structural view of a rear dust mist barrier provided with a rear sensor. As shown in fig. 15, a rear sensor 810 is disposed between the spray head 6 and the rear dust baffle 8, and the rear sensor 810 is in signal connection with a controller for controlling the rotation of the turntable 2, so that when the spray head 6 contacts the rear dust baffle 8, a signal is transmitted to the controller through the rear sensor 810, the turntable 2 is controlled to be reversed, and the inner wall of the circular elbow part 9 is sprayed again when the spray head 6 rotates in the reverse direction.

The automatic reciprocating spraying method for the inner wall of the circular bend is described by combining the figures:

after the front dust and mist baffle 7 is buckled at the front end opening of the round elbow pipe fitting 9, the rotary driving mechanism drives the rotary table 2 to continuously rotate in the forward direction, the spraying head 6 is separated from the front dust and mist baffle 7 to trigger the front sensor 710, the front sensor 710 sends a signal to the controller, the controller controls the conveying switch to be opened, and the coating conveying pump starts to convey coating to the spraying head 6; the spraying head 6 sprays the inner wall of the circular elbow piece 9 in the process of moving along the central axis of the arc line at a constant speed.

The spraying head 6 moves to the rear end of the circular bent pipe fitting 9, the spraying head 6 touches a rear sensor 810 positioned on the rear dust and mist baffle 8, the rear sensor 810 sends a signal to the controller, the controller controls the rotating mechanism, the rotating mechanism drives the arc-shaped supporting arm 5 to reversely rotate around the central rotating shaft of the rotary table 2, and the spraying head 6 sprays the inner wall of the circular bent pipe fitting 9 again until the spraying head 6 at the front end of the arc-shaped supporting arm 5 is driven to reversely move and leave the circular bent pipe fitting 9.

The spraying head 6 moves reversely to the front opening of the round elbow piece 9, the spraying head 6 is combined with the front dust baffle 7 to trigger the front sensor 710 again, the front sensor 710 sends a signal to the controller, the controller controls the conveying switch to be closed, and the coating conveying pump stops conveying the coating to the spraying head 6.

The automatic spraying system and the spraying method realize automatic spraying control, improve the spraying efficiency of the round elbow piece 9, increase the economic benefit, reduce the labor intensity of workers, avoid the close contact of operators in the spraying process, reduce the influence of dust fog generated by spraying on the human health and improve the operation safety.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, various changes or modifications may be made by the patentees within the scope of the appended claims, and within the scope of the invention, as long as they do not exceed the scope of the invention described in the claims.

Claims

1. Circular return bend inner wall flush coater includes revolving stage, centre gripping subassembly, spraying assembly and control assembly, its characterized in that:

the rotary table (2) is arranged on the base (1), the central rotating shaft is vertically arranged, and the base (1) is provided with a rotating mechanism for driving the rotary table (2) to rotate circumferentially;

the clamping assembly is arranged on the outer side of the rotary table (2) and comprises an inner seat body (31) and an outer seat body (32) which are arranged oppositely along the radial direction; the inner seat body (31) is fixed on the base (1), the outer seat body (32) is arranged on a radial guide rail (11) of the base (1) in a sliding mode and is in driving connection with the clamping mechanism, and the circular bent pipe piece (9) is supported and positioned through the inner seat body (31) and the outer seat body (32), so that the circular bent pipe piece (9) and the rotary table (2) are arranged coaxially;

the spraying assembly comprises a radial supporting arm (4), an arc-shaped supporting arm (5), a spraying head (6) and a coating delivery pump, wherein the curvature radius of the arc-shaped supporting arm (5) is equal to that of a circular elbow piece (9) to be sprayed, the rear end of the arc-shaped supporting arm (5) is connected to the turntable (2) through the radial supporting arm (4), the arc-shaped supporting arm (5) and the turntable (2) are coaxially arranged, and the spraying head (6) is arranged at the front end of the arc-shaped supporting arm (5);

the control assembly comprises a controller in signal connection with the rotating mechanism and the clamping mechanism and configured to: the rotating mechanism is controlled to drive the rotary table to rotate circumferentially, and the clamping mechanism is controlled to drive the outer seat body to move radially.

2. The circular elbow inner wall coating machine according to claim 1, characterized in that: the arc-shaped supporting arm (5) is of an axial hollow structure, the output end of the coating delivery pump is in fluid communication with the rear end of the axial hollow structure, and the spraying head (6) is in fluid communication with the front end of the axial hollow structure.

3. The circular elbow inner wall coating machine according to claim 1, characterized in that: the spraying head (6) comprises a bent cylindrical shell (61) which is arranged in the radial surface of the front end of the arc-shaped supporting arm (5) and has an outer diameter smaller than the inner diameter of the circular bent pipe fitting (9), and a plurality of nozzles (62) are annularly arranged on the periphery of the bent cylindrical shell (61).

4. The circular elbow inner wall coating machine according to claim 1, characterized in that: interior pedestal (31) include the internal support portion and compress tightly the portion, the first circular arc structure (311) of pedestal (31) outside including the internal support portion for setting up, with the inboard cambered surface matched with of circular elbow spare (9), location portion is for setting up at first excircle (311) arc structure front side top, with circular elbow spare (9) top cambered surface matched with second circular arc structure (312).

5. The circular elbow inner wall coating machine according to claim 1, characterized in that: the outer base body (32) comprises an outer supporting portion and a supporting portion, the outer supporting portion is a third arc structure (321) which is arranged on the inner side of the outer base body (32) and matched with the outer arc surface of the round bent pipe fitting (9), and the supporting portion is a fourth arc structure (322) which is arranged at the bottom of the front side of the third arc structure (321) and matched with the arc surface of the bottom of the round bent pipe fitting (9).

6. The circular elbow inner wall coating machine according to claim 1, characterized in that: the clamping mechanism comprises a clamping linear cylinder (33) and a pressure sensor, the clamping linear cylinder (33) is arranged along the direction of a radial guide rail, a cylinder body of the clamping linear cylinder (33) is connected with the base (1), a piston rod is connected with the outer base body (32), the pressure sensor is arranged on an inner supporting portion of the inner base body (31) through a return spring (71), and the sensor is in signal connection with the controller.

7. The utility model provides an excessive circular return bend inner wall spraying equipment of dustproof fog which characterized in that: the inner wall coating machine for the circular elbow pipe comprises the inner wall coating machine for the circular elbow pipe as claimed in claims 1 to 6, and further comprises a front dust fog baffle (7), wherein the front dust fog baffle (7) is provided with a central bent hole (71), the central bent hole (71) is in sliding fit with the arc-shaped supporting arm (5), and the front dust fog baffle (7) is located on the rear side of the coating head (6) and is driven by the arc-shaped supporting arm (5) to be buckled at the opening at the front end of the circular elbow pipe part (9); the dust collector is characterized by further comprising a rear dust fog baffle (8), wherein the rear dust fog baffle (8) is slidably arranged on the base (1) and can be opened and closed with the rear end of the round bent pipe fitting (9).

8. The circular elbow inner wall spraying equipment for preventing dust mist from overflowing according to claim 7, characterized in that: the dust-removing device is characterized by further comprising a movable rear dust fog baffle (8), wherein an arc-shaped guide rail taking the rotary table (2) as the center is arranged on the base (1), and the movable rear dust fog baffle (8) is arranged on the base (1) in a sliding mode.

9. The dust mist overflow preventing circular elbow pipe inner wall spraying equipment according to claim 8, characterized in that: the method is characterized in that: still include base (1) closing mechanism still, closing mechanism includes linear jar of lock (81), preceding articulated seat (83) and the articulated seat (82) in back, preceding articulated seat (83) are connected with back dirt fog baffle (8) through the preceding hinge of vertical pivot, the back hinge of articulated seat (82) through vertical pivot is connected with base (1), the linear jar of lock (81) set up in the front between articulated seat (83) and the articulated seat (82) in back to dust fog baffle (8) slide along arc guide.

10. A method for repeatedly spraying the inner wall of a circular bent pipe in a reciprocating manner by single clamping is characterized by comprising the following steps:

first, the circular elbow piece moves inwards and is positioned: placing the circular bent pipe (9) on an outer seat body (32) of the clamping assembly, driving the outer seat body (32) and the circular bent pipe (9) on the outer seat body by a radial driving mechanism to move inwards, and jointly supporting and positioning the circular bent pipe (9) by the inner seat body (31) and the outer seat body (32) so that an arc central axis of the circular bent pipe (9) is superposed with an arc central axis of the arc supporting arm (5);

step two, forward spraying: the rotary driving mechanism drives the rotary table (2) to rotate in the forward direction, the rotary table (2) drives the spraying head (6) to enter the circular bent pipe fitting (9) from the front end opening through the radial supporting arm (4) and the arc supporting arm (5), and the spraying head (6) sprays the inner wall of the circular bent pipe fitting (9) in the forward movement process along the arc central axis until the spraying head (6) moves to the rear end of the circular bent pipe fitting (9);

thirdly, reverse spraying: the rotary driving mechanism drives the rotary table (2) to rotate reversely, the rotary table (2) drives the spraying head (6) to rotate reversely through the radial supporting arm (4) and the arc supporting arm (5), and the spraying head (6) sprays on the inner wall of the circular bent pipe fitting (9) in the process of moving forwards along the arc central axis until the spraying head (6) moves to the front end of the circular bent pipe fitting (9);

repeating the second step and the third step, driving the spraying head 6 to move forwards and backwards for multiple times, and spraying the inner wall of the circular bent pipe fitting (9) for multiple times; (4) the round bent pipe fitting is moved outwards and taken down: the radial driving mechanism drives the outer seat body (32) to move outwards, the round bent pipe piece (9) moves outwards along with the outer seat body (32), and the round bent pipe piece (9) on the outer seat body (32) is taken down.