A ductile cast iron pipe rotary spraying clamping device

Abstract

The present application relates to a kind of rotary spraying clamping devices in the process of external spraying of bell and spigot nodular cast iron pipe, including clamping drive mechanism, inner center, outer center, a pedestal, second pedestal, third pedestal, the bottom of the outer center is provided with recess allowing the anti-shear piece to be embedded in the opposite position of the outer center fixed hole 211;The outer center is detachably connected with the inner center by the outer center fixed hole, the hole in the anti-shear piece, the anti-shear piece installation groove;The second pedestal protrusion is matched with the second pedestal pin groove, and the second pedestal is detachably connected to the top surface of the first pedestal by the second pedestal fixed hole, and the third pedestal is detachably connected to the top surface of the first pedestal by the third pedestal fixed hole, and the service life of bolt is improved by changing the complete anti-torsion of bolt connection into protrusion or anti-shear piece.

Description

Technical Field

[0001] This invention relates to a rotary spraying clamping device, and more particularly to a rotary spraying clamping device for use in the external spraying process of ductile iron pipes with sockets. Background Technology

[0002] The technical requirements of GB / T 13295-2019 Ductile Iron Pipes, Fittings and Accessories for Water and Gas Use mention that pipes and fittings are usually delivered in an internally and externally coated state. Before coating, the inner and outer surfaces should be free of rust and debris. After coating, the coating on the inner and outer surfaces should be uniform, firmly adhered, and not abnormal due to climate change. The outer coating of centrifugal ductile iron pipes should include a zinc layer and a zinc-compatible synthetic resin finishing layer covering it.

[0003] The prior art, a push-rotating mechanism for zinc spraying of cast iron pipes (application number: 201921354572.4), discloses a rotating spraying clamping device in the zinc spraying process. It states that when zinc spraying of cast iron pipes is carried out, the main and driven push spindles in the main and driven push-rotating mechanism first need to move in opposite directions to clamp the cast iron pipe and lock it. Then, the cast iron pipe is rotated, and then the zinc spraying carriage sprays zinc.

[0004] The inventors discovered in their research on the prior art that: (1) Since the clamping head and the rotating mechanism are usually connected by bolts, the bolts are prone to breakage and have a short service life when used for high-speed and high-torque rotation; (2) In flexible production (workpieces of different diameter specifications pass through the line at the same time), it is necessary to frequently replace the push-rotating assembly.

[0005] Therefore, there is an urgent need for a rotary spraying clamping device for ductile iron pipes that is adaptable to flexible production and has a long service life. Summary of the Invention

[0006] To overcome the problems of short bolt life and lack of flexible production components in existing technologies, a concave-convex mating form similar to a key connection is used to transform the direct bolt connection into a block structure that overcomes shear forces. At the same time, a matching structure is added to a single top structure to achieve rapid replacement with simple disassembly.

[0007] The technical solution adopted in this invention is: a rotary spraying clamping device for ductile iron pipes, comprising: ductile iron pipes;

[0008] The clamping drive mechanism is a linear telescopic and rotating drive mechanism located on both sides of the axial direction of the ductile iron pipe. The end of the clamping drive mechanism near the ductile iron pipe is fixedly connected to a top connecting part.

[0009] The top connecting part protrudes and is fixed on the top connecting part. It is a protrusion facing the direction of the ductile iron pipe, or the top connecting part is provided with a top connecting part groove on the side facing the ductile iron pipe. A rigid block protruding from the top connecting part groove is detachably provided in the top connecting part groove.

[0010] The inner tip is an umbrella-shaped cone, and the bottom surface of the inner tip is provided with an inwardly recessed groove that mates with the protrusion of the tip connection part.

[0011] The inner center is provided with an inner center fixing hole that penetrates the top and bottom surfaces of the inner center, and the center connecting part is provided with a channel opposite to the inner center fixing hole. The inner center passes through the inner center fixing hole and is detachably connected to the center connecting part by bolts.

[0012] The top surface of the inner center is also provided with an inwardly recessed anti-shear component mounting groove, and the bottom of the anti-shear component mounting groove has a channel connecting to the bottom of the inner center.

[0013] The outer tip is an umbrella-shaped cone, and its bottom is provided with a groove that is the same or similar in shape to the top surface of the inner tip and is fitted onto the outside of the top surface of the inner tip.

[0014] The outer center fixing hole is a channel that passes through the top and bottom surfaces of the outer center and is opposite to the position of the shear member mounting groove;

[0015] The shear-resistant component is a rigid wedge with a channel that is opposite to the fixing hole of the outer center and passes through the shear-resistant component;

[0016] The bottom of the outer tip is provided with a groove that allows the shearing member to be embedded in the relative position of the outer tip fixing hole; the outer tip is detachably connected to the inner tip via the outer tip fixing hole, the channel on the shearing member, and the shearing member mounting groove.

[0017] When the inner center and the outer center are assembled, part of the shear-resistant component is located inside the outer center, and the other part is located inside the inner center;

[0018] The outer or inner center mates with both ends of the ductile iron pipe along its axial direction, and the clamping and driving mechanism is used to fix and rotate the ductile iron pipe.

[0019] Furthermore, it also includes a socket top seat, wherein the outer or inner center on the side that mates with the ductile iron pipe socket is replaced by the socket top seat;

[0020] The clamping drive mechanism on the spigot side of the ductile iron pipe further includes:

[0021] The top seat connection part is fixedly connected to the end of the clamping drive mechanism near the ink-cast iron pipe inlet;

[0022] The top seat connection part protrudes and is fixed on the top seat connection part, and is a protrusion facing the ductile iron pipe socket; or the top seat connection part is provided with a top seat connection part groove on the side facing the ductile iron pipe, and a rigid block protruding from the top seat connection part groove is detachably provided in the top seat connection part groove;

[0023] The socket top seat includes:

[0024] The first top seat is a circular basin-shaped structure with a conical indentation on the top surface, and the bottom surface of the first top seat is provided with a groove that mates with the protrusion of the top seat connection part.

[0025] The first top seat fixing hole is a channel located on the top surface of the first top seat and near the center of the first top seat, penetrating the top and bottom surfaces of the first top seat; the top seat connecting part is provided with a channel opposite to the first top seat fixing hole, and the first top seat is detachably connected to the top seat connecting part by means of the first top seat fixing hole.

[0026] Furthermore, the socket top seat also includes:

[0027] The second top seat pin groove is located on the top surface of the first top seat and is close to the center of the first top seat.

[0028] The second top seat is a circular basin-shaped structure with a conical indentation on the top surface, and the radius of the second top seat is smaller than that of the first top seat.

[0029] The second top seat protrusion is located at the bottom of the second top seat and extends outward.

[0030] The second top seat fixing hole is a channel that penetrates the top and bottom surfaces of the second top seat;

[0031] A channel is provided on the first top seat and the top seat connection portion, which is opposite to the arrangement position of the second top seat fixing hole and passes through the first top seat and the top seat connection portion;

[0032] The second top seat protrusion engages with the second top seat pin groove, and the second top seat is detachably connected to the top surface of the first top seat via the second top seat fixing hole.

[0033] Furthermore, the socket top seat also includes:

[0034] The first top seat shear mounting groove is a recessed groove located on the top surface of the first top seat and near the edge of the first top seat; the bottom of the first top seat shear mounting groove is provided with a channel penetrating the first top seat.

[0035] The third top seat is a circular basin-shaped structure with a conical indentation on the top surface, and the radius of the third top seat is greater than that of the first top seat.

[0036] The third top seat shear-resistant protrusion is located on the bottom surface of the third top seat and extends outward. The top surface of the third top seat shear-resistant protrusion is provided with a channel that penetrates the top surface of the third top seat.

[0037] The third top seat fixing hole is located on the top surface of the third top seat and is a channel that passes through the top surface of the third top seat and the base. The first top seat and the top seat connecting part are provided with a channel that passes through the first top seat and the top seat connecting part, which is opposite to the arrangement position of the third top seat fixing hole.

[0038] The third top seat shear-resistant protrusion engages with the first top seat shear-resistant mounting groove, and the third top seat is detachably connected to the top surface of the first top seat via the third top seat fixing hole.

[0039] Furthermore, the third top seat shear-resistant protrusion side is provided with lifting lugs or lifting holes outward relative to the center of the third top seat.

[0040] Furthermore, a through hole is provided at the center of the first top seat, penetrating both the top and bottom surfaces of the first top seat.

[0041] Furthermore, the top surfaces of the inner and outer centers form an angle of 65° to 80° with the axis of the ductile iron pipe.

[0042] Furthermore, the angle between the top surface of the first top seat and the axis of the ductile iron pipe is 65° to 80°.

[0043] Furthermore, the angle between the top surface of the second top seat and the axis of the ductile iron pipe is 65° to 80°.

[0044] Furthermore, the angle between the top surface of the third top seat and the axis of the ductile iron pipe is 65° to 80°.

[0045] The beneficial effects of this invention compared with the prior art are as follows: (1) By using the top connection protrusion, shear-resistant part, top seat connection protrusion, second top seat protrusion, and third top seat shear-resistant protrusion, the bolt connection is completely transformed from anti-torsion to protrusion or shear-resistant part, thereby improving the service life of the bolt; (2) The composite assembly structure of inner top, outer top, first top seat, second top seat, and third top seat is easy to install and replace, and reduces the overall weight; (3) The top seat at the socket end is designed according to the spray gun spraying angle, and the segmented design avoids areas of the socket that are not sprayed. Attached Figure Description

[0046] Figure 1 This is a front view of a specific embodiment of the present invention;

[0047] Figure 2 This is a frontal axial view of the outer top of a specific embodiment of the present invention;

[0048] Figure 3 This is an axial view of the outer top of a specific embodiment of the present invention;

[0049] Figure 4 This is a side view of the socket tip according to a specific embodiment of the present invention;

[0050] Figure 5 This is a cross-sectional view of the inner and outer apex combination in a specific embodiment of the present invention;

[0051] Figure 6 This is a top-side view of a specific embodiment of the present invention;

[0052] Figure 7 This is a front view of the top surface of the center point in a specific embodiment of the present invention;

[0053] Figure 8 This is a top-view cross-sectional view of a specific embodiment of the present invention;

[0054] Figure 9 This is a front view of the connecting surface of the top connecting part according to a specific embodiment of the present invention;

[0055] Figure 10 This is a front axial view of the first top seat according to a specific embodiment of the present invention;

[0056] Figure 11 This is a cross-sectional view of the first top seat according to a specific embodiment of the present invention;

[0057] Figure 12 This is a front view of the top surface of the first top seat according to a specific embodiment of the present invention;

[0058] Figure 13 This is a front view of the top surface of the top seat connecting part according to a specific embodiment of the present invention;

[0059] Figure 14 This is a side view of the first top seat clamping the ductile iron pipe according to a specific embodiment of the present invention;

[0060] Figure 15 This is a front view of the top surface of the second top seat according to a specific embodiment of the present invention;

[0061] Figure 16 This is a cross-sectional view of the second top seat according to a specific embodiment of the present invention;

[0062] Figure 17 This is a rear axial view of the second top seat according to a specific embodiment of the present invention;

[0063] Figure 18 This is a side view of the first and second top seats in their assembled state and the ductile iron pipe clamping state according to a specific embodiment of the present invention.

[0064] Figure 19 This is a rear axial view of the third top seat according to a specific embodiment of the present invention;

[0065] Figure 20 This is a front axial view of the third top seat according to a specific embodiment of the present invention;

[0066] Figure 21 This is a side view of the first and third top seats in their assembled state and the ductile iron pipe clamping state according to a specific embodiment of the present invention.

[0067] The markings are as follows: 100 - clamping drive mechanism; 110 - center point connection; 111 - center point connection protrusion; 120 - top seat connection; 121 - top seat connection protrusion.

[0068] 200- Top of the socket;

[0069] 210 - Outer center; 211 - Outer center fixing hole; 212 - Shear-resistant component; 2121 - Shear-resistant component mounting slot;

[0070] 220 - Inner center; 221 - Inner center fixing hole; 230 - Inner center pin groove;

[0071] 300-Socket Top Mount;

[0072] 310 - First top seat; 311 - First top seat shear mounting groove; 312 - First top seat fixing hole; 313 - Second top seat pin groove; 314 - First top seat;

[0073] 320 - Second top seat; 321 - Second top seat protrusion; 322 - Second top seat fixing hole;

[0074] 330 - Third top seat; 331 - Third top seat fixing hole; 332 - Third top seat shear protrusion;

[0075] 400-Ductile iron pipe. Detailed Implementation

[0076] The technical solutions in the embodiments are clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0077] To overcome the problems of short bolt life and lack of flexible production components in existing technologies, a key-like interlocking mechanism is used to transform direct bolt connections into block structures that overcome shear forces. Simultaneously, matching structural elements are added to individual top-mounted structures, enabling rapid replacement with simple disassembly. Please refer to [link / reference]. Figures 1 to 21 The technical solution adopted in this invention is as follows:

[0078] A rotary spraying clamping device for ductile iron pipes includes:

[0079] 400 ductile iron pipe;

[0080] Generally, ductile iron pipes refer to metal pipes made of ductile iron with socket joints. Although this application is limited to ductile iron pipes, metal pipes with the same socket joint structure as ductile iron pipes should also be included within the scope of protection of this invention.

[0081] The clamping drive mechanism 100 is a linear telescopic and rotating drive mechanism located on both sides of the axial direction of the ductile iron pipe 400. The clamping drive mechanism 100 is fixedly connected to a top connecting part 110 at the end near the ductile iron pipe 400.

[0082] For details, please refer to existing technologies 201921355217.9 / 201921354572.4, both of which describe the drive structure of the clamping device.

[0083] The top connecting part protrusion 111 is fixed on the top connecting part 110 and is a protrusion facing the ductile iron pipe 400, or the top connecting part 110 is provided with a top connecting part groove on the side facing the ductile iron pipe 400, and a rigid block protruding from the top connecting part groove is detachably provided in the top connecting part groove.

[0084] In this embodiment, there are two technical solutions. One solution is to provide a protrusion in the tip connection portion 110, which cooperates with the inner tip 220. The other solution is that the protrusion is a rigid metal block similar to the shear-resistant member 212, with part of this metal block embedded in the tip connection portion 110 and the other part embedded in the inner tip 220. Please refer to [link / reference]. Figure 8 The cross-sectional view shows that the metal block can be fixed with bolts or placed movably in the cavity formed by the top connection 110 and the inner top 220. During rotation, the shear force between the top connection 110 and the inner top 220 is borne by the rigid metal block, avoiding the insufficient shear resistance of simple bolt connection, similar to the traditional key connection structure.

[0085] The top connecting part 110 is also provided with a socket top 200, including an inner top 220 and an outer top 210.

[0086] The inner tip 220 is an umbrella-shaped cone, and the bottom surface of the inner tip 220 is provided with an inwardly recessed groove that matches the protrusion 111 of the tip connection part.

[0087] The inner tip 220 is provided with an inner tip fixing hole 221 that penetrates the top and bottom surfaces of the inner tip 220. The tip connecting part 110 is provided with a channel opposite to the inner tip fixing hole 221. The inner tip 220 passes through the inner tip fixing hole 221 and is detachably connected to the tip connecting part 110 by bolts.

[0088] Please see Figure 9 The unmarked circular holes are bolt holes for connecting the inner center 220 and the outer center 210. Since it is a composite structure, the traditional bolt connection structure is the main connection method in the specific embodiment of the present invention for easy installation.

[0089] The top surface of the inner center 220 is also provided with an inwardly recessed anti-shear component mounting groove 2121, and the bottom of the anti-shear component mounting groove 2121 has a channel communicating with the bottom of the inner center 220.

[0090] The outer tip 210 is an umbrella-shaped cone, and its bottom is provided with a groove that is the same or similar in shape to the top surface of the inner tip 220 and is fitted onto the outside of the top surface of the inner tip 220.

[0091] The outer center fixing hole 211 is a channel that passes through the top and bottom surfaces of the outer center 210 and is positioned opposite to the shear member mounting groove 2121.

[0092] The shear-resistant member 212 is a rigid wedge with a channel that is opposite to the outer center fixing hole 211 and passes through the shear-resistant member 212;

[0093] Please see Figure 3 The shear-resistant component 212 is also provided with a channel to facilitate the passage of bolts.

[0094] The bottom of the outer tip 210 is provided with a groove that allows the shear member 212 to be inserted at a position opposite to the outer tip fixing hole 211; the outer tip 210 is detachably connected to the inner tip 220 through the outer tip fixing hole 211, the channel on the shear member 212, and the shear member mounting groove 2121.

[0095] When the inner center 220 and the outer center 210 are assembled, part of the shear-resistant member 212 is located inside the outer center 210, and the other part is located inside the inner center 220; please refer to Figure 3 , Figure 6 , Figure 7The shear-resistant component 212 is a structure in which the inner tip 220 and the outer tip 210 are respectively embedded. In the assembled state, the support is provided because the inner tip 220 and the outer tip 210 are separate structures, and the shear force is generated during the torque process.

[0096] Of course, in some other embodiments, the shear-resistant member 212 can be fixed to the bottom of the outer tip 210. Although the shear-resistant member 212 is a movable metal block in this application, the technical solution of fixing it to the bottom of the outer tip 210 should be considered as an equivalent technical feature.

[0097] The outer center 210 or the inner center 220 cooperates with both ends of the ductile iron pipe 400 along the axial direction, and the ductile iron pipe 400 is fixed and rotated by means of the clamping drive mechanism 100.

[0098] In this embodiment, the internal coating of cement or other internal coatings after the ductile iron pipe 400 is lined is not considered. The conical structure of the socket tip 200 is installed on both sides of the socket and spigot, and inserted into the socket and spigot of the ductile iron pipe 400 to achieve clamping and rotation functions.

[0099] In some embodiments, if the socket still utilizes the structure of the socket tip 200, the cement lining or other coating inside the ductile iron pipe 400 will be damaged after being inserted into the socket. To overcome the above problem, a socket top seat 300 is also included, in which the outer tip 210 or inner tip 220 on the side that mates with the socket of the ductile iron pipe 400 is replaced by the socket top seat 300.

[0100] The clamping drive mechanism 100 on the spigot side of the ductile iron pipe 400 further includes:

[0101] The top seat connecting part 120 is fixedly connected to the end of the clamping drive mechanism 100 near the insertion port of the cast iron pipe 400;

[0102] The top seat connecting part protrusion 121 is fixed to the top seat connecting part 120 and is a protrusion facing the insertion direction of the ductile iron pipe 400; or the top seat connecting part 120 is provided with a top seat connecting part groove on the side facing the ductile iron pipe 400, and a rigid block protruding from the top seat connecting part groove is detachably provided in the top seat connecting part groove; the connection method of the top seat connecting part protrusion 121 is the same as the connection method of the top seat connecting part protrusion 111. The only difference is in their position.

[0103] The socket top seat 300 includes: a first top seat 310, which is a circular basin-shaped structure with a conical depression on the top surface, and the bottom surface of the first top seat 310 is provided with a groove that cooperates with the protrusion 121 of the top seat connecting part;

[0104] Please see Figure 11In this embodiment, the base of the first top seat 310 is flat in order to cooperate with the top seat connecting part 120.

[0105] The first top seat fixing hole 312 is located on the top surface of the first top seat 310 and is a channel that penetrates the top and bottom surfaces of the first top seat 310 near the center of the first top seat 310; the top seat connecting part 120 is provided with a channel opposite to the first top seat fixing hole 312, and the first top seat 310 is detachably connected to the top seat connecting part 120 by means of the first top seat fixing hole 312.

[0106] Please see Figure 13 The top seat connecting portion 120 is provided with bolt holes for connecting the first top seat 310, the second top seat 320, and the third top seat 330. In this embodiment, the bolt holes connecting the first top seat 310, the second top seat 320, and the third top seat 330 are circumferentially arranged around the center.

[0107] The same principle applies to the top connecting part 110, the purpose of which is to ensure a reasonable layout and even force distribution.

[0108] In other embodiments, to accommodate flexible production of different pipe diameters, the spigot top seat 300 further includes:

[0109] The second top seat pin groove 313 is located on the top surface of the first top seat 310 and is close to the center of the first top seat 310.

[0110] The second top seat 320 is a circular basin-shaped structure with a conical indentation on the top surface, and the radius of the second top seat 320 is smaller than the radius of the first top seat 310.

[0111] The second top seat protrusion 321 is located at the bottom of the second top seat 320 and is an outwardly protruding protrusion;

[0112] The second top seat fixing hole 322 is a channel that passes through the top and bottom surfaces of the second top seat 320;

[0113] A channel is provided on the first top seat 310 and the top seat connecting part 120, which is opposite to the arrangement position of the second top seat fixing hole 322 and passes through the first top seat 310 and the top seat connecting part 120.

[0114] The second top seat protrusion 321 engages with the second top seat pin groove 313, and the second top seat 320 is detachably connected to the top surface of the first top seat 310 via the second top seat fixing hole 322.

[0115] In other embodiments, the socket top seat further includes:

[0116] The first top seat shear mounting groove 311 is a groove located on the top surface of the first top seat 310 and recessed inward near the edge of the first top seat 310; the bottom of the first top seat shear mounting groove 311 is provided with a channel penetrating the first top seat 310.

[0117] The third top seat 330 is a circular basin-shaped structure with a conical indentation on the top surface, and the radius of the third top seat 330 is larger than the radius of the first top seat 310.

[0118] The third top seat shear protrusion 332 is located on the bottom surface of the third top seat 330 and is an outward protrusion. The top surface of the third top seat shear protrusion 332 is provided with a channel that penetrates the top surface of the third top seat 330.

[0119] The third top seat fixing hole 331 is located on the top surface of the third top seat 330 and is a channel that passes through the top surface of the third top seat 330 and the base. The first top seat 310 and the top seat connecting part 120 are provided with a channel that passes through the first top seat 310 and the top seat connecting part 120, which is opposite to the arrangement position of the third top seat fixing hole 331.

[0120] The third top seat shear protrusion 332 is in concave-convex fit with the first top seat shear mounting groove 311, and the third top seat 330 is detachably connected to the top surface of the first top seat 310 by means of the third top seat fixing hole 331.

[0121] In this embodiment, the first top seat 310, the second top seat 320, and the third top seat 330 can also appear as a set, and the combination can be changed according to the requirements of flexible production.

[0122] Preferably, the side of the third top seat shear protrusion 332 is provided with a lifting lug or lifting hole relative to the center of the third top seat 330.

[0123] In some embodiments, considering the weight of the combination of multiple components, a through hole is provided at the center of the first top seat 310, extending through both the top and bottom surfaces of the first top seat 310. See also... Figure 10 and Figure 11 The first top seat 310 is hollow inside to reduce the weight of the components.

[0124] During the spraying process on the outer wall of the ductile iron pipe, the paint sprayed from the nozzle is generally distributed in a conical shape. Therefore, when it comes into contact with the ductile iron pipe 400, it forms an inclined surface. In order to fit the inclined surface structure and maintain the spraying effect, the top surface of the inner tip 220 and the outer tip 210 makes an angle of 65° to 80° with the axis of the ductile iron pipe 400, preferably 75°.

[0125] Preferably, the angle between the top surface of the first top seat 310 and the axis of the ductile iron pipe 400 is 65° to 80°.

[0126] Preferably, the angle between the top surface of the second top seat 320 and the axis of the ductile iron pipe 400 is 65° to 80°.

[0127] Preferably, the angle between the top surface of the third top seat 330 and the axis of the ductile iron pipe 400 is 65° to 80°.

[0128] In this embodiment, the inner center 220 and the outer center 210 are located on one side of the socket center 200, forming one group; the first top seat 310, the second top seat 320, and the third top seat 330 are located on one side of the socket top seat 300, forming another group. The radius of the inner center 220 is larger than the radius of the DN300 ductile iron pipe 400, and it is used in the production of DN80-300 pipes. The radius of the outer center 210 is larger than the radius of the DN600 ductile iron pipe 400, and it is used in the production of DN350-600 pipes. The radius of the first top seat 310 is larger than the radius of the DN300 ductile iron pipe 400, and it is used in the production of DN200-300 pipes. The radius of the second top seat 320 is larger than the radius of the DN150 ductile iron pipe 400, and it is used in the production of DN80-150 pipes. The radius of the third top seat 330 is larger than the radius of the DN600 ductile iron pipe 400, and it is used in the production of DN350-600 pipes. The specifications described above are matched with the socket top 200 and the spigot top 300 according to the needs of the production line, in order to adapt to flexible production. Of course, under the premise of the present invention, it can also be expanded to full-specification production.

[0129] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A rotary spraying clamping device for ductile iron pipes, characterized in that, include: Ductile iron pipe (400); The clamping drive mechanism (100) is a linear telescopic and rotating drive mechanism located on both sides of the axial direction of the ductile iron pipe (400). The clamping drive mechanism (100) is fixedly connected to the end near the ductile iron pipe (400) with a top connecting part (110). The top connecting part protrusion (111) is fixed on the top connecting part (110) and is a protrusion facing the ductile iron pipe (400), or the top connecting part (110) is provided with a top connecting part groove on the side facing the ductile iron pipe (400), and a rigid block protruding from the top connecting part groove is detachably provided in the top connecting part groove; The inner tip (220) is an umbrella-shaped cone. The bottom surface of the inner tip (220) is provided with an inwardly recessed groove that matches the protrusion (111) of the tip connection part. The inner tip (220) is provided with an inner tip fixing hole (221) that penetrates the top and bottom surfaces of the inner tip (220). The tip connecting part (110) is provided with a channel opposite to the inner tip fixing hole (221). The inner tip (220) passes through the inner tip fixing hole (221) and is detachably connected to the tip connecting part (110) by bolts. The top surface of the inner center (220) is also provided with an inwardly recessed anti-shear component mounting groove (2121), and the bottom of the anti-shear component mounting groove (2121) has a channel connecting to the bottom of the inner center (220); The outer tip (210) is an umbrella-shaped cone, and its bottom is provided with a groove that is the same or similar in shape to the top surface of the inner tip (220) and is fitted onto the outside of the top surface of the inner tip (220); The outer center fixing hole (211) is a channel that passes through the top and bottom surfaces of the outer center (210) and is opposite to the position of the shear member mounting groove (2121); The shear-resistant member (212) is a rigid wedge with a channel that is opposite to the outer center fixing hole (211) and passes through the shear-resistant member (212); The bottom of the outer tip (210) is provided with a groove that allows the shearing member (212) to be inserted at a position opposite to the outer tip fixing hole (211); the outer tip (210) is detachably connected to the inner tip (220) through the outer tip fixing hole (211), the channel on the shearing member (212), and the shearing member mounting groove (2121); When the inner center (220) and the outer center (210) are assembled, a portion of the shear-resistant member (212) is located inside the outer center (210), and another portion is located inside the inner center (220); The outer center (210) or inner center (220) cooperates with both ends of the ductile iron pipe (400) along the axial direction, and the ductile iron pipe (400) is fixed and rotated by means of the clamping drive mechanism (100).

2. The rotary spraying clamping device for ductile iron pipes according to claim 1, characterized in that, The top surfaces of the inner center (220) and the outer center (210) form an angle of 65° to 80° with the axis of the ductile iron pipe (400).

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