CN221537022U - Paint spraying device for nodular cast iron pipe - Google Patents

Abstract

The utility model relates to the technical field of machining equipment and discloses a spray painting device for a nodular cast iron pipe, which comprises a box body and a plurality of groups of rotating shafts, wherein the rotating shafts are positioned on the side wall surfaces of the box body and are connected with the same in a rotating way, a positioning spray painting device is arranged in a cavity of the box body and comprises clamping rings for clamping each other, a plurality of groups of tensioning plates for tensioning and a plurality of groups of atomizing spray heads for spraying, the clamping rings are movably connected with the rotating shafts, the clamping rings are in sliding connection with the box body, the tensioning plates are movably connected with the rotating shafts, the atomizing spray heads are in sliding connection with the box body, the iron pipe fixed by the clamping rings and the tensioning plates is sprayed, the phenomenon that the thickness of a spray painting surface of the iron pipe is uneven due to shaking of the iron pipe when the iron pipe rotates along with the rotating is avoided, the tensioning plates are placed in the cavity of the iron pipe, the surface of the iron pipe is prevented from being covered by a positioning clamp, the covered area needs manual spraying, and the workload of operators is increased.

Description

Paint spraying device for nodular cast iron pipe

Technical Field

The utility model belongs to the technical field of machining equipment, and particularly relates to a paint spraying device for a ductile cast iron pipe.

Background

The prior art discloses a nodular cast iron pipe paint spraying device (CN 202021477263.9), which comprises a box body, wherein a liquid storage tank is fixedly arranged on one side of the outer wall of the box body, a spraying pipe is fixedly communicated with one side of the top of the liquid storage tank, the spraying pipe penetrates through the box body and extends into the box body, a spraying pump is fixedly connected to one end, close to the liquid storage tank, of the spraying pipe, and a spraying nozzle is fixedly connected to one end, far away from the liquid storage tank, of the spraying pipe;

In the in-service use, through the output shaft fixed connection clamping component of motor, the clamping component wraps up the iron pipe that will spray, and the iron pipe that is wrapped up by the clamping component is when spraying paint it, can probably lead to being unable by spraying paint coverage by the iron pipe surface of parcel department to increase operating personnel's work load, simultaneously when clamping component drives the iron pipe and rotates, clamping component can only clamp two wall surfaces of iron pipe, and pivoted iron pipe can produce and rock, thereby leads to iron pipe surface spraying thickness inequality.

The present utility model has been made in view of this.

Disclosure of utility model

In order to solve the technical problems, the utility model adopts the basic conception of the technical scheme that:

The utility model provides a nodular cast iron pipe paint spraying apparatus, includes box and multiunit axis of rotation, is located the equal axis of rotation of box lateral wall face all rotation connection, is provided with location paint spraying apparatus in the cavity of box, location paint spraying apparatus contains the clamping ring that is used for mutual centre gripping, the multiunit that is used for rising to tightly rise to tightly the board and be used for spraying the multiunit atomizer, clamping ring and axis of rotation swing joint, clamping ring and box sliding connection, rise to tightly the board and axis of rotation swing joint, atomizer and box sliding connection, atomizer spraying is by clamping ring and the fixed iron pipe of rising to tightly the board;

The positioning paint spraying device further comprises a plurality of groups of rotating rings and a plurality of groups of first springs, the rotating rings are fixedly connected with the rotating shaft, the first springs are positioned between the clamping rings and the rotating rings, one ends of the first springs are fixedly connected with the clamping rings, and the other ends of the first springs are fixedly connected with the rotating rings;

The positioning paint spraying device further comprises a plurality of groups of conversion rods and a plurality of groups of connecting rods, the conversion rods are fixedly connected with the rotating ring, the connecting rods are fixedly connected with the clamping ring, the surface annular array of the conversion rods is provided with limiting guide grooves matched with the connecting rods, and the connecting rods penetrate into the limiting guide grooves and are in sliding connection with the conversion rods;

the plurality of groups of tension plates are in annular array relative to the conversion rod, the tension plates are movably connected with the conversion rod, the tension plates are arc-shaped, the same tension plates are arranged between every two clamping rings, and the tension plates are movably connected with the clamping rings;

The positioning paint spraying device further comprises a plurality of groups of second springs, the second springs are located between the tensioning plate and the conversion rod, one ends of the second springs are fixedly connected with the tensioning plate, and the other ends of the second springs are fixedly connected with the conversion rod.

As a preferred implementation mode of the utility model, the positioning paint spraying device further comprises a plurality of groups of connecting rings, the surface of the conversion rod is provided with an adaptive positioning sliding hole, the connecting rings are embedded into the positioning sliding holes and are in sliding connection with the conversion rod, and the connecting rods are fixedly connected with the connecting rings in an annular array relative to the connecting rings.

As a preferred embodiment of the utility model, the positioning paint spraying device further comprises a spraying hose and a paint box, wherein the paint box is movably connected with the box body, the atomizing nozzle is positioned on the bottom surface of the paint box and fixedly connected with the atomizing nozzle, the atomizing nozzle is in linear array relative to the paint box, the atomizing nozzle is mutually communicated with a cavity of the paint box, the spraying hose is positioned on the top surface of the paint box and fixedly connected with the paint box, and the spraying hose is mutually communicated with the cavity of the paint box.

As a preferred implementation mode of the utility model, the positioning paint spraying device further comprises a plurality of groups of sliding blocks, the two ends of the paint box are fixedly connected with the same sliding blocks, the inner side wall surface of the box body is provided with a sliding groove for adapting to the sliding blocks, and the sliding blocks are embedded into the sliding groove and are in sliding connection with the box body.

As a preferred embodiment of the utility model, the positioning paint spraying device further comprises a plurality of groups of air cylinders and a plurality of groups of connecting seats, wherein the connecting seats are positioned on the top surface of the paint box and fixedly connected with the paint box, the air cylinders are positioned on the top surface of the box and fixedly connected with the box, and one ends of the air cylinders are fixedly connected with the connecting seats.

Compared with the prior art, the utility model has the following beneficial effects:

1. Through multiunit atomizer to being fixed and rotatory iron pipe spraying paint, atomizer spun paint covers the surface of iron pipe, it is fixed with the iron pipe through holding ring and the setting of tensioning board, avoid following the pivoted at the iron pipe, the iron pipe produces to rock and leads to the offset, thereby make iron pipe surface spraying paint face thickness uneven, place the tensioning board in the cavity of iron pipe, the holding ring supports the side at the iron pipe, avoid the surface of iron pipe to be covered by positioning fixture, thereby the regional manual work that needs to spray that leads to being covered, operating personnel's work load has been increased, the qualification rate of product has been reduced.

2. When operating personnel all place the both ends of iron pipe on the transfer pole, compressed first spring begins reverse promotion grip ring, and the grip ring begins to keep away from the swivel becket, receives first spring and promotes the iron pipe for the thrust of grip ring, makes the grip ring of iron pipe both sides hug closely the terminal surface of iron pipe and presss from both sides tight fixed iron pipe, through grip ring and swivel becket elastic connection, the effectual specification that has increased the spray painting device can spray paint the iron pipe, can make the iron pipe clamp simultaneously fixed, avoid producing in the spraying process and rock, lead to the spraying uneven.

3. The iron pipe is characterized in that the tensioning plate is nested in a cavity of the iron pipe, the tensioning plate is pressed under the action of gravity of the iron pipe, the pressing tensioning plate starts to press the second spring, meanwhile, the second spring can give the tensioning plate a reverse acting force, the tensioning plate is tightly attached to the inner wall surface of the iron pipe, the contact area of the tensioning plate and the iron pipe is increased, friction force is increased, the rotating shaft drives the tensioning plate to rotate together, the phenomenon that the tensioning plate is not fully contacted with the iron pipe is avoided, the iron pipe is caused to skid, the surface of the iron pipe is unevenly sprayed, meanwhile, the tensioning plate is elastically connected with the converting rod, when the inner diameter of the iron pipe is changed, the tensioning plate is pushed by the second spring, the tensioning plate is attached to the inner wall of the iron pipe better, meanwhile, the weight of the iron pipe is borne, the phenomenon that the rotating iron pipe is slipped is reduced, the local spraying thickness of the iron pipe is avoided, and the qualification rate of the iron pipe is reduced.

4. Through set up the cylinder at the top surface of box, let in gas for the cylinder, gas promotes the movable rod in the cylinder intracavity and removes, and the movable rod removes and drives the lacquer case and reciprocate along the spout, adjusts the distance between atomizer and the iron pipe, avoids atomizer spun paint to make the paint overburden of iron pipe reach qualified standard to increase operating personnel's work load, reduced the qualification rate of iron pipe, increased the cost expenditure of enterprise.

The following describes the embodiments of the present utility model in further detail with reference to the accompanying drawings.

Drawings

In the drawings:

FIG. 1 is a schematic perspective view of a paint spraying apparatus according to the present utility model;

FIG. 2 is a schematic perspective view of the interior of the paint spraying apparatus of the present utility model;

FIG. 3 is a schematic perspective view of a positioning and fixing device according to the present utility model;

FIG. 4 is a perspective view of a positioning and fixing assembly according to the present utility model;

FIG. 5 is a schematic perspective view of a tensioning assembly of the present utility model;

FIG. 6 is a schematic perspective view of a clamping and fixing assembly according to the present utility model;

Fig. 7 is a schematic perspective view of a spray assembly according to the present utility model.

In the figure: 10. a case; 11. a chute; 12. spraying a hose; 13. a cylinder; 14. a rotating shaft; 15. a switching lever; 16. a rotating ring; 17. a first spring; 18. a clamping ring; 19. a second spring; 20. a tensioning plate; 21. positioning a sliding hole; 22. a limit guide groove; 23. a paint box; 24. a slide block; 25. a connecting seat; 26. an atomizing nozzle; 27. a connecting ring; 28. and (5) connecting a rod.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and the following embodiments are used to illustrate the present utility model.

The utility model provides a nodular cast iron pipe paint spraying apparatus, as shown in fig. 2 and 3, including box 10 and multiunit axis of rotation 14, be located the equal axis of rotation 14 of box 10 lateral wall face all rotation connection, be provided with location paint spraying apparatus in the cavity of box 10, location paint spraying apparatus contains the holding ring 18 that is used for mutual centre gripping, the multiunit that is used for tensioning the board 20 and the multiunit atomizer 26 that is used for spraying, holding ring 18 and axis of rotation 14 swing joint, holding ring 18 and box 10 sliding connection, tensioning board 20 and axis of rotation 14 swing joint, atomizer 26 and box 10 sliding connection, atomizer 26 spraying is by holding ring 18 and the fixed iron pipe of tensioning board 20.

Specifically, when in use, the side wall surface of the box body 10 is fixedly connected with a driving motor, the output shaft of the driving motor is fixedly connected with one of the rotating shafts 14, a worker inserts the tension plates 20 symmetrically arranged at two sides into the cavity of an iron pipe to be painted, and simultaneously the two end wall surfaces of the iron pipe squeeze and push the clamping rings 18, because the clamping rings 18 and the tension plates 20 are elastically connected with the rotating shafts 14, the tension plates 20 receiving the pressure of the iron pipe can reversely push the iron pipe, so that the tension plates 20 tension in the cavity of the iron pipe, and simultaneously the clamping rings 18 receiving the extrusion can apply an axial force to the iron pipe, the clamping rings 18 at two sides clamp the iron pipe at the same time, the interaction of the clamping rings 18 and the tension plates 20 can fix the iron pipe for the driving motor, the driving motor drives the output shaft to rotate, thereby the output shaft rotates to promote axis of rotation 14 rotation to drive the iron pipe and rotates, to being fixed and rotatory iron pipe spraying paint through multiunit atomizer 26, atomizer 26 spun paint covers the surface of iron pipe, it is fixed with the iron pipe through the setting of grip ring 18 and tensioning board 20, avoid following the pivoted at the iron pipe, the iron pipe produces and rocks and lead to the position offset, thereby make iron pipe surface spraying paint face thickness uneven, place tensioning board 20 in the cavity of iron pipe, grip ring 18 supports the side at the iron pipe, avoid the surface of iron pipe to be covered by positioning fixture, thereby it needs the manual work to carry out the spraying to lead to covered region, operating personnel's work load has been increased, the qualification rate of product has been reduced.

As shown in fig. 4 and 6, the positioning and painting device further comprises a plurality of groups of rotating rings 16 and a plurality of groups of first springs 17, the rotating rings 16 are fixedly connected with the rotating shaft 14, the first springs 17 are located between the clamping rings 18 and the rotating rings 16, one ends of the first springs 17 are fixedly connected with the clamping rings 18, the other ends of the first springs 17 are fixedly connected with the rotating rings 16, the positioning and painting device further comprises a plurality of groups of switching rods 15 and a plurality of groups of connecting rods 28, the switching rods 15 are fixedly connected with the rotating rings 16, the connecting rods 28 are fixedly connected with the clamping rings 18, the surface annular array of the switching rods 15 is provided with limiting guide grooves 22 adapting to the connecting rods 28, the connecting rods 28 penetrate into the limiting guide grooves 22 and are in sliding connection with the switching rods 15, the positioning and painting device further comprises a plurality of groups of connecting rings 27, the surface of the switching rods 15 is provided with adaptive positioning slide holes 21, the connecting rings 27 are embedded into the positioning slide holes 21 and are in sliding connection with the switching rods 15, and the connecting rods 28 are annularly arrayed about the connecting rings 27 and are fixedly connected with the connecting rings 27.

Specifically, when in use, the clamping ring 18 is elastically connected with the rotating ring 16 through the first spring 17, when an operator nests the iron pipe on the converting rod 15, the clamping ring 18 can be pushed by the iron pipe, the pushed clamping ring 18 can compress the first spring 17 and enable the clamping ring 18 to move along the path of the limiting guide groove 22 towards the rotating ring 16, when the operator places both ends of the iron pipe on the converting rod 15, the compressed first spring 17 starts to reversely push the clamping ring 18, the clamping ring 18 starts to be far away from the rotating ring 16, the iron pipe is pushed by the pushing force of the first spring 17 to the clamping ring 18, the clamping rings 18 on both sides of the iron pipe are tightly clamped and fixed on the end face of the iron pipe, the specification of the iron pipe capable of spraying paint by the paint spraying device is effectively increased through the elastic connection of the clamping ring 18 and the rotating ring 16, and meanwhile, the iron pipe can be clamped and fixed, and uneven spraying caused in the spraying process is avoided.

As shown in fig. 4 and fig. 5, the plurality of groups of tensioning plates 20 are annularly arrayed about the conversion rod 15, the tensioning plates 20 are movably connected with the conversion rod 15, the tensioning plates 20 are arc-shaped, the same tensioning plates 20 are arranged between every two clamping rings 18, the tensioning plates 20 are movably connected with the clamping rings 18, the positioning paint spraying device further comprises a plurality of groups of second springs 19, the second springs 19 are located between the tensioning plates 20 and the conversion rod 15, one ends of the second springs 19 are fixedly connected with the tensioning plates 20, and the other ends of the second springs 19 are fixedly connected with the conversion rod 15.

Specifically, when using, with the tight board 20 nestification of rising, the gravity effect that receives the iron pipe is offered and is pressed tight board 20, the tight board 20 that receives the pressure begins to press second spring 19, the second spring 19 can give tight board 20 a reverse effort simultaneously, make tight board 20 closely laminate at the internal face of iron pipe, increase the area of contact of tight board 20 and iron pipe, thereby increase frictional force, pivoted axis of rotation 14 drives tight board 20 and rotates together, avoid tight board 20 and iron pipe's contact inadequately, lead to the iron pipe to skid and make iron pipe surface spraying uneven, simultaneously through tight board 20 and transfer lever 15 elastic connection, when the internal diameter of iron pipe changes, give tight board 20's thrust through second spring 19, make tight board 20 better laminate with the internal wall of iron pipe, bear the weight of iron pipe simultaneously, reduce the phenomenon that the iron pipe that the local spraying thickness of iron pipe appears skidding is greater than the standard value, reduce the qualification rate of iron pipe.

As shown in fig. 2 and 7, the positioning paint spraying device further comprises a spraying hose 12 and a paint box 23, the paint box 23 is movably connected with the box body 10, the atomizing nozzle 26 is located on the bottom surface of the paint box 23 and fixedly connected with the atomizing nozzle 26, the atomizing nozzle 26 is in linear array with the paint box 23, the atomizing nozzle 26 is communicated with a cavity of the paint box 23, the spraying hose 12 is located on the top surface of the paint box 23 and fixedly connected with the paint box 23, the spraying hose 12 is communicated with the cavity of the paint box 23, the positioning paint spraying device further comprises a plurality of groups of sliding blocks 24, two ends of the paint box 23 are fixedly connected with the same sliding blocks 24, the inner side wall surface of the box body 10 is provided with sliding grooves 11 adapting to the sliding blocks 24, the sliding blocks 24 are embedded into the sliding grooves 11 and are in sliding connection with the box body 10, the positioning paint spraying device further comprises a plurality of groups of air cylinders 13 and a plurality of groups of connecting seats 25, the connecting seats 25 are located on the top surface of the paint box 23 and fixedly connected with the paint box 23, the air cylinders 13 are located on the top surface of the box body 10 and fixedly connected with the box body 10, and one ends of the air cylinders 13 are fixedly connected with the connecting seats 25.

Specifically, when using, the one end fixedly connected with spraying pump of spraying hose 12, the input and the liquid reserve tank fixed connection of spraying pump, the liquid reserve tank passes through spraying pump and spraying hose 12 intercommunication each other, at this moment, power on for the spraying pump, the spraying pump is with the paint suction pressurization in the liquid reserve tank to the cavity of paint box 23, the paint in the cavity of paint box 23 that receives pressure is discharged through atomizer 26 and is sprayed to the surface of iron pipe, because the diameter of iron pipe is different, the thickness of required spraying paint is different, through set up cylinder 13 at the top surface of box 10, let in gas for cylinder 13, the movable rod of gas promotion cylinder 13 intracavity removes, the movable rod removes and drives paint box 23 along spout 11 reciprocates, adjust the distance between atomizer 26 and the iron pipe, avoid atomizer 26 spun paint to make the paint overburden of iron pipe reach qualified standard, thereby increase operating personnel's work load, the qualification rate of iron pipe has been reduced, the cost of enterprise has been increased.

Working principle: the side wall surface of the box body 10 is fixedly connected with a driving motor, an output shaft of the driving motor is fixedly connected with one of the rotating shafts 14, a worker inserts the tension plates 20 symmetrically arranged at two sides into a cavity of an iron pipe to be sprayed, and simultaneously, the two end wall surfaces of the iron pipe push and push the clamping rings 18, because the clamping rings 18 and the tension plates 20 are elastically connected with the rotating shafts 14, the tension plates 20 under the pressure of the iron pipe can reversely push the iron pipe, the tension plates 20 are tightly tensioned in the cavity of the iron pipe, and simultaneously, the clamping rings 18 under the extrusion can apply an axial force to the iron pipe, the clamping rings 18 at two sides simultaneously clamp the iron pipe, and the interaction of the clamping rings 18 and the tension plates 20 ensures that the iron pipe is fixed, For the driving motor, the driving motor drives the output shaft to rotate, the output shaft rotates to push the rotating shaft 14 to rotate so as to drive the iron pipe to rotate, paint is sprayed to the fixed and rotating iron pipe through a plurality of groups of atomizing spray heads 26, paint sprayed by the atomizing spray heads 26 covers the surface of the iron pipe, the iron pipe is fixed through the arrangement of the clamping ring 18 and the tensioning plate 20, the situation that the iron pipe shakes to cause position deviation when the iron pipe rotates along with the rotation is avoided, the thickness of the paint sprayed surface on the surface of the iron pipe is uneven, the clamping ring 18 and the rotating ring 16 are elastically connected through the first spring 17, when an operator nests the iron pipe on the conversion rod 15, the iron pipe can push the clamping ring 18, The clamp ring 18 pushed by the extrusion can compress the first spring 17 and enable the clamp ring 18 to move towards the direction of the rotating ring 16 along the path of the limit guide groove 22, when an operator places both ends of the iron pipe on the conversion rod 15, the compressed first spring 17 starts to push the clamp ring 18 reversely, the clamp ring 18 starts to be far away from the rotating ring 16, the push force of the first spring 17 to the clamp ring 18 pushes the iron pipe, the clamp rings 18 on both sides of the iron pipe tightly clamp and fix the iron pipe tightly, the specification of the iron pipe capable of being sprayed by the paint spraying device can be effectively increased through the elastic connection of the clamp ring 18 and the rotating ring 16, meanwhile, the iron pipe can be clamped and fixed, The tension plate 20 is nested in a cavity of the iron pipe, the tension plate 20 is pressed under the gravity action of the iron pipe, the pressed tension plate 20 starts to press the second spring 19, meanwhile, the second spring 19 can give a reverse acting force to the tension plate 20, so that the tension plate 20 is tightly attached to the inner wall surface of the iron pipe, the contact area of the tension plate 20 and the iron pipe is increased, the friction force is increased, the rotating shaft 14 drives the tension plate 20 to rotate together, the phenomenon that the tension plate 20 is insufficiently contacted with the iron pipe, the iron pipe is slipped to cause uneven spraying on the surface of the iron pipe is avoided, meanwhile, the tension plate 20 is elastically connected with the conversion rod 15, The tensioning plate 20 is better attached to the inner wall of the iron pipe through the thrust of the second spring 19, the weight of the iron pipe is borne at the same time, one end of the spraying hose 12 is fixedly connected with a spraying pump, the input end of the spraying pump is fixedly connected with a liquid storage tank, the liquid storage tank is communicated with the spraying hose 12 through the spraying pump, the spraying pump is electrified at the moment, the spraying pump sucks out and pressurizes paint in the liquid storage tank to a cavity of the paint tank 23, paint in the cavity of the pressurized paint tank 23 is discharged and sprayed to the surface of the iron pipe through the atomizing nozzle 26, because the diameters of the iron pipes are different, the thickness of the required spraying paint is different, the cylinder 13 is arranged on the top surface of the tank body 10, The air is introduced into the air cylinder 13, the air pushes a movable rod in the cavity of the air cylinder 13 to move, the movable rod moves to drive the paint box 23 to move up and down along the chute 11, and the distance between the atomizing nozzle 26 and the iron pipe is adjusted.

It will be understood that the utility model has been described in terms of several embodiments, and that various changes and equivalents may be made to these features and embodiments by those skilled in the art without departing from the spirit and scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from the essential scope thereof. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

Claims (5)

1. The utility model provides a nodular cast iron pipe paint spraying apparatus, includes box (10) and multiunit axis of rotation (14), is located box (10) lateral wall face and all rotates axis of rotation (14) the same, characterized in that, is provided with location paint spraying apparatus in the cavity of box (10), location paint spraying apparatus contains clamping ring (18) that are used for mutual centre gripping, the multiunit that is used for tensioning (20) and is used for spraying multiunit atomizer (26), clamping ring (18) and axis of rotation (14) swing joint, clamping ring (18) and box (10) sliding connection, tensioning (20) and axis of rotation (14) swing joint, atomizer (26) and box (10) sliding connection, atomizer (26) spraying is by clamping ring (18) and the fixed iron pipe of tensioning (20);

The positioning paint spraying device further comprises a plurality of groups of rotating rings (16) and a plurality of groups of first springs (17), the rotating rings (16) are fixedly connected with the rotating shaft (14), the first springs (17) are positioned between the clamping rings (18) and the rotating rings (16), one ends of the first springs (17) are fixedly connected with the clamping rings (18), and the other ends of the first springs (17) are fixedly connected with the rotating rings (16);

The positioning paint spraying device further comprises a plurality of groups of conversion rods (15) and a plurality of groups of connecting rods (28), the conversion rods (15) are fixedly connected with the rotating ring (16), the connecting rods (28) are fixedly connected with the clamping ring (18), limiting guide grooves (22) which are matched with the connecting rods (28) are annularly arranged on the surface of the conversion rods (15), and the connecting rods (28) penetrate into the limiting guide grooves (22) to be in sliding connection with the conversion rods (15);

The plurality of groups of tensioning plates (20) are in annular array relative to the conversion rod (15), the tensioning plates (20) are movably connected with the conversion rod (15), the tensioning plates (20) are arc-shaped, the same tensioning plates (20) are arranged between every two clamping rings (18), and the tensioning plates (20) are movably connected with the clamping rings (18);

The positioning paint spraying device further comprises a plurality of groups of second springs (19), the second springs (19) are located between the tensioning plate (20) and the switching rod (15), one ends of the second springs (19) are fixedly connected with the tensioning plate (20), and the other ends of the second springs (19) are fixedly connected with the switching rod (15).

2. The ductile iron pipe painting device according to claim 1, characterized in that the positioning painting device further comprises a plurality of groups of connecting rings (27), the surface of the switching rod (15) is provided with an adaptive positioning slide hole (21), the connecting rings (27) are embedded into the positioning slide hole (21) and are in sliding connection with the switching rod (15), and the connecting rods (28) are in annular array relative to the connecting rings (27) and are fixedly connected with the connecting rings (27).

3. The ductile iron pipe spray-painting device according to claim 1, characterized in that the positioning spray-painting device further comprises a spray hose (12) and a paint box (23), the paint box (23) is movably connected with the box body (10), the atomizer (26) is positioned on the bottom surface of the paint box (23) and fixedly connected with the atomizer (26), the atomizer (26) is in a linear array relative to the paint box (23), the atomizer (26) is mutually communicated with a cavity of the paint box (23), the spray hose (12) is positioned on the top surface of the paint box (23) and fixedly connected with the paint box (23), and the spray hose (12) is mutually communicated with the cavity of the paint box (23).

4. The nodular cast iron pipe paint spraying device according to claim 1, wherein the positioning paint spraying device further comprises a plurality of groups of sliding blocks (24), the two ends of the paint box (23) are fixedly connected with the same sliding blocks (24), the inner side wall surface of the box body (10) is provided with a sliding groove (11) which is matched with the sliding blocks (24), and the sliding blocks (24) are embedded into the sliding groove (11) and are in sliding connection with the box body (10).

5. The nodular cast iron pipe paint spraying device according to claim 1, wherein the positioning paint spraying device further comprises a plurality of groups of air cylinders (13) and a plurality of groups of connecting seats (25), the connecting seats (25) are positioned on the top surface of the paint box (23) and are fixedly connected with the paint box (23), the air cylinders (13) are positioned on the top surface of the box body (10) and are fixedly connected with the box body (10), and one ends of the air cylinders (13) are fixedly connected with the connecting seats (25).