CN112610782B - Full-corrosion-resistant connecting structure for bacteriostatic lining plastic composite steel pipe and construction method thereof - Google Patents
Full-corrosion-resistant connecting structure for bacteriostatic lining plastic composite steel pipe and construction method thereof Download PDFInfo
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- CN112610782B CN112610782B CN202011501802.2A CN202011501802A CN112610782B CN 112610782 B CN112610782 B CN 112610782B CN 202011501802 A CN202011501802 A CN 202011501802A CN 112610782 B CN112610782 B CN 112610782B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/06—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end
- F16L47/12—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end with additional locking means
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Abstract
The invention relates to the technical field of pipe connection, in particular to a full-corrosion-resistant connection structure for an antibacterial lining plastic composite steel pipe and a construction method thereof, wherein the composite steel pipe comprises a steel base pipe and a lining plastic pipe, and the connection structure comprises: the plastic joints are arranged at the opposite ends of the two composite steel pipes, the outer circumferential surfaces of the plastic joints are provided with connecting rings, the two ends of each connecting ring are also provided with step edges, and straight plates are uniformly distributed in the plastic joints and penetrate through T-shaped rigid frames of the connecting rings along the radial direction of the plastic joints; the sleeve is symmetrically arranged on the periphery of the joint of the composite steel pipe along the end face through adjustable fixed pipe fittings, and a filling cavity is formed between the interior of the sleeve sealing assembly and the periphery of the joint of the composite steel pipe; the friction increasing ring is arranged on the step edge; the filler is filled in a filling cavity formed by the peripheries of the steel sleeve auxiliary sleeve, the adjustable fixed pipe fitting and the composite steel pipe, the structure can be effectively connected with the composite steel pipe, and the working efficiency is high.
Description
Technical Field
The invention relates to the technical field of pipe connection, in particular to a full-corrosion-resistant connection structure for a bacteriostatic lining plastic composite steel pipe and a construction method thereof.
Background
In the prior art, in order to realize butt welding connection of the lining plastic composite steel pipes, a section of stainless steel pipe needs to be additionally arranged at the port of the lining plastic composite steel pipe, or a section of double-layer metal composite pipe with stainless steel as a lining needs to be additionally arranged. By utilizing the stainless steel pipe section or the double-layer metal composite pipe section, on one hand, the lining plastic layer at the port of the plastic-lined composite steel pipe is not damaged by high temperature generated by welding when the plastic-lined composite steel pipe is in butt welding connection; on the other hand, the carbon steel base pipe at the port of the plastic-lined composite steel pipe is not contacted with the medium conveyed in the plastic-lined composite steel pipe, so that the carbon steel base pipe at the port of the plastic-lined composite steel pipe is prevented from being corroded. However, when high-temperature, high-pressure and strong corrosive media are conveyed in the plastic-lined composite steel pipe, the stainless steel pipe section or the double-layer metal composite pipe section additionally arranged at the end port of the plastic-lined composite steel pipe has the possibility of being corroded. Therefore, the finding and designing of the full-anticorrosion connecting structure form of the plastic-lined composite steel pipe capable of meeting the requirements of conveying high-temperature, high-pressure and strong-corrosion media becomes a major technical problem which needs to be considered and solved in the installation of the long-distance plastic-lined composite steel pipeline.
Chinese patent CN201620429362.7 discloses a full anti-corrosion connection structure for lining plastic composite steel pipes, which provides a full anti-corrosion connection structure for lining plastic composite steel pipes suitable for conveying high-temperature, high-pressure and strong corrosive media. Full anticorrosive connection structure moulds compound steel pipe, coupling mechanism, stopping, plastics coupling and contains the steel sleeve pipe that holds the chamber including the lining the link that compound steel pipe was moulded to the lining has one section inside lining plastic tubing linkage segment of having stripped the steel parent tube, adjacent two sections the inside lining plastic tubing linkage segment that compound steel pipe was moulded to the lining passes through plastic tubing joint sealing connection, adjacent two sections the steel parent tube that compound steel pipe was moulded to the lining passes through steel sleeve pipe with coupling mechanism connect for a whole, the stopping fill by steel sleeve pipe hold the chamber with the filling chamber that compound steel pipe's lateral wall constitutes is moulded to the lining.
This connection structure need strip steel base pipe of steel pipe tip when the construction for both ends inside lining plastics tip exposes, very easily makes and cuts the inside lining plastics tip when stripping the steel base pipe.
Disclosure of Invention
In order to solve the technical problems, the technical scheme solves the full-corrosion-resistant connection corrosion-resistant problem of the bacteriostatic lining plastic composite steel pipe.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
the utility model provides a full corrosion-resistant connection structure for compound steel pipe is moulded to bacterial inhibition type lining, compound steel pipe is including steel parent tube and inside lining plastic tubing, connection structure including: the outer diameter of the plastic joint is equal to the inner diameter of the lining plastic pipe, the plastic joint is coaxially and fixedly arranged at opposite ends of the two composite steel pipes, a connecting ring with the outer diameter not smaller than the outer diameter of the composite steel pipes is arranged on the outer circumferential surface of the plastic joint, the steel base pipe and the lining plastic pipe are coaxially butted at two ends of the connecting ring, step edges superposed with the axial projection surface of the steel base pipe are further arranged at two ends of the connecting ring, straight plates are further uniformly distributed in the plastic joint and penetrate through the T-shaped rigid frame of the connecting ring along the radial direction of the plastic joint, and plates on two sides of the T-shaped rigid frame are located in the plastic joint; the steel sleeve main sleeve and the steel sleeve auxiliary sleeve are symmetrically and fixedly arranged on the periphery of the joint of the composite steel pipe through adjustable fixing pipe fittings along the end faces, the end faces of the steel sleeve main sleeve and the steel sleeve auxiliary sleeve are welded, sealed and fixed, a filling cavity is formed between the inner part of a steel sleeve main sleeve and steel sleeve auxiliary sleeve sealing assembly and the periphery of the joint of the composite steel pipe, and the T-shaped rigid frame straight plate penetrates through the joint of the steel sleeve main sleeve and the steel sleeve auxiliary sleeve along the radial direction and is fixedly clamped by the steel sleeve main sleeve and the steel sleeve auxiliary sleeve; the friction increasing ring is coaxially arranged in the stepped edge, and the outer diameter of the friction increasing ring is not larger than that of the steel base pipe; and the filling material is filled in a filling cavity formed by the inner part of the steel sleeve main sleeve and the steel sleeve auxiliary sleeve sealing assembly and the periphery of the joint of the steel pipe.
Preferably, the T-shaped rigid frame comprises: the arc plates are coaxially and uniformly distributed in the plastic joint; and the pulling plate is fixedly arranged at the center of the outer cambered surface of the arc plate along the radial direction and penetrates through the connecting ring.
Preferably, both ends of the inner circumferential surface of the plastic joint are provided with inclined edges with diameters gradually increasing from inside to outside.
Preferably, the top of the steel sleeve main sleeve is provided with a filling opening penetrating along the radial direction, and the filling opening is used for filling filler into a filling cavity formed by the connection periphery of the steel sleeve main sleeve and the steel sleeve auxiliary sleeve with the composite steel pipe.
Preferably, the adjustable fixing pipe comprises: the fixing sleeve is coaxially arranged at one end of the steel sleeve main sleeve and one end of the steel sleeve auxiliary sleeve respectively, the inner diameter of the fixing sleeve is not smaller than the outer diameter of the steel base tube, open slots along the axial direction are uniformly distributed on the fixing sleeve, and the outer circumferential surface of the fixing sleeve is provided with an external thread conical surface of which the wide end faces the sleeve; the inner circumferential surface of the rotating sleeve is sequentially provided with an internal thread conical surface and a smooth conical surface, the internal thread conical surface and the external thread conical surface are connected in a threaded manner coaxially, and the taper of the smooth conical surface is larger than that of the internal thread conical surface.
Preferably, the adjustable fixed pipe fitting further comprises fixed blocks, the fixed blocks are uniformly distributed on the outer circumferential surface of the rotating sleeve along the circumferential direction, and the fixed blocks are provided with inserting holes along the radial direction of the fixed sleeve.
Preferably, the friction increasing ring is a wave washer, and the distance between two ends of the friction increasing ring is greater than the axial width of the step edge.
Preferably, the width of the filling material along the two axial sides of the composite steel pipe is smaller than the axial width of the plastic joint.
Preferably, the two sides of the pulling plate are uniformly and radially provided with limiting teeth coaxial with the plastic joints at equal intervals along the composite steel pipe, and the outer end of the pulling plate is provided with a through hole coaxial with the plastic joints; first sliding grooves which penetrate through the steel sleeve main sleeve along the radial direction are uniformly distributed on the end face of the steel sleeve main sleeve, and first limiting grooves which are coaxial with the first sliding grooves are uniformly distributed in the first sliding grooves at equal intervals; second sliding grooves which penetrate through the steel sleeve pair sleeve along the radial direction are uniformly distributed on the end face of the steel sleeve pair sleeve, second limiting grooves which are coaxial with the second sliding grooves are uniformly distributed in the second sliding grooves at equal intervals, and the pulling plate is clamped in the limiting grooves along the radial direction through limiting teeth in the working state.
A full anti-corrosion connection structure for bacteriostatic lining plastic composite steel pipes and a construction method thereof comprise the following steps:
firstly, in work, the end faces of a steel sleeve main sleeve and a steel sleeve auxiliary sleeve are arranged at two ends of two composite steel pipes in a sliding mode through adjustable fixing pipe fittings oppositely;
step two, aligning the end faces of two composite steel pipes to be connected coaxially;
step three, the friction increasing ring is coaxially arranged on the step edge;
step four, coaxially fixing the plastic joint at the port of the lining plastic pipe to enable the steel base pipe to be in coaxial butt joint with two ends of the connecting ring;
sliding the steel sleeve main sleeve and the steel sleeve auxiliary sleeve to align the end faces of the steel sleeve main sleeve and the steel sleeve auxiliary sleeve, enabling the T-shaped rigid frame straight plate to penetrate through the end faces in the radial direction, pulling the outer end of the pulling plate through the support, enabling the arc plate to drive the plastic joint to slightly deform and expand so as to be tightly attached to the inner periphery of the port of the composite steel pipe, enabling the fixing sleeve to deform and tighten by rotating the rotating sleeve, enabling the steel sleeve main sleeve and the steel sleeve auxiliary sleeve to be fixed at the ends of the two composite steel pipes respectively, enabling the end faces of the steel sleeve main sleeve and the steel sleeve auxiliary sleeve to be in coaxial abutting connection, enabling the first sliding groove and the second sliding groove to abut to clamp the pulling plate together, and enabling the pulling plate and the sleeve to be relatively stable at the joint of the fixed composite steel pipes;
and step six, welding abutting surfaces of the steel sleeve main sleeve and the steel sleeve auxiliary sleeve, so that the steel sleeve main sleeve and the steel sleeve auxiliary sleeve are welded into an assembly, a filling cavity is formed at the periphery of the joint of the assembly and the composite steel pipe, and filling materials are injected into the filling cavity through the injection port and cured, so that the full-corrosion-resistant connection work of the composite steel pipe is completed.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the T-shaped rigid frame, the steel sleeve main sleeve and the steel sleeve auxiliary sleeve are used for stabilizing the joint of the composite steel pipes, specifically, during operation, the end faces of the steel sleeve main sleeve and the steel sleeve auxiliary sleeve are relatively arranged at the two ends of the two composite steel pipes in a sliding manner through the adjustable fixed pipe fittings, and the working ends of the adjustable fixed pipe fittings are not locked, so that the steel sleeve main sleeve and the steel sleeve auxiliary sleeve can freely slide on the composite steel pipes sleeved with the steel sleeve main sleeve and the steel sleeve auxiliary sleeve along the axial direction; aligning the end faces of two composite steel pipes to be connected coaxially; the friction increasing ring is coaxially arranged on the step edge, so that the end surface of the steel base tube and the end surface of the connecting ring are not easy to axially rotate, and the structure is more stable; then the plastic joint is coaxially fixed at the end port of the lining plastic pipe, so that the steel base pipe is coaxially abutted against the two ends of the connecting ring; sliding the steel sleeve main sleeve and the steel sleeve auxiliary sleeve to align the end faces of the steel sleeve main sleeve and the steel sleeve auxiliary sleeve, enabling the T-shaped rigid frame straight plate to penetrate through the end faces in the radial direction, pulling the outer end of the pulling plate through the support, enabling the arc plate to drive the plastic joint to slightly deform and expand so as to be tightly attached to the inner periphery of the port of the composite steel pipe, enabling the fixing sleeve to deform and tighten through rotating the rotating sleeve, enabling the steel sleeve main sleeve and the steel sleeve auxiliary sleeve to be fixed at the ends of the two composite steel pipes respectively, enabling the end faces of the two composite steel pipes to be in coaxial butt joint, enabling the pulling plate to be clamped by the first sliding groove and the butt joint together, and enabling the pulling plate and the sleeve to be relatively stable to fix the joint of the composite steel pipes; compared with the prior art, the connecting structure does not need to carry out any treatment on the end of the composite steel pipe, so that the working efficiency is higher;
2. the periphery of the joint of the composite steel pipe is fixed by the filler, specifically, the butt joint surfaces of the steel sleeve main sleeve and the steel sleeve auxiliary sleeve are welded, so that the steel sleeve main sleeve and the steel sleeve auxiliary sleeve are welded into an assembly, a filling cavity is formed at the periphery of the joint of the assembly and the composite steel pipe, the filler is injected into the filling cavity through the injection port and is cured, and the full-corrosion-proof connection work of the composite steel pipe is completed; compared with the prior art, the connection mode has better corrosion resistance.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a side view of the present invention;
FIG. 3 is a cross-sectional view at section C-C of FIG. 2;
FIG. 4 is a cross-sectional perspective view at section C-C of FIG. 2;
FIG. 5 is a perspective view of the plastic joint of the present invention;
FIG. 6 is a perspective view of a T-shaped rigid frame of the present invention;
fig. 7 is a perspective view of a steel sleeve primary sleeve and a steel sleeve secondary sleeve of the present invention;
FIG. 8 is a side view of the steel sleeve main sleeve and adjustable fixing tube of the present invention;
FIG. 9 is a cross-sectional view at section D-D of FIG. 8;
fig. 10 is a perspective view of the friction increasing ring of the present invention.
The reference numbers in the figures are:
a-a steel base tube;
b-lining a plastic pipe;
1-a plastic joint; 1 a-a connecting ring; 1a 1-step edge; 1 b-a T-shaped rigid frame; 1b 1-arc plate; 1b 2-pull plate; 1b 3-limit teeth; 1b 4-vias; 1 c-a ramp;
2-steel sleeve main sleeve; 2 a-an injection port; 2 b-a first chute; 2b1 — first restraint slot;
3-steel sleeve auxiliary sleeve; 3 a-a second chute; 3 b-a second limiting groove;
4-fixing the pipe fitting in an adjustable manner; 4 a-a fixed sleeve; 4a 1-open slots; 4a 2-external thread taper; 4 b-rotating the sleeve; 4b 1-internal thread taper; 4b 2-smooth conical surface; 4 c-fixing block; 4c 1-plug-in hole;
5-friction increasing ring;
6-filling material.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.
Referring to fig. 3, a full corrosion-resistant connection structure for compound steel pipe is moulded to bacteriostasis type lining, compound steel pipe is including steel parent tube A and inside lining plastic tubing B, connection structure including:
the plastic joint 1, the outer diameter of the plastic joint 1 is equal to the inner diameter of the lining plastic pipe B, the plastic joint 1 is coaxially and fixedly arranged at opposite ends of two composite steel pipes, a connecting ring 1a with the outer diameter not smaller than the outer diameter of the composite steel pipes is arranged on the outer circumferential surface of the plastic joint 1, the steel base pipe A and the lining plastic pipe B are coaxially abutted to two ends of the connecting ring 1a, step edges 1a1 coincident with the axial projection surface of the steel base pipe A are further arranged at two ends of the connecting ring 1a, T-shaped rigid frames 1B with straight plates penetrating through the connecting ring 1a along the radial direction of the plastic joint 1 are further uniformly distributed in the plastic joint 1, and two side plates of the T-shaped rigid frame 1B are positioned in the plastic joint 1;
the steel sleeve main sleeve 2 and the steel sleeve auxiliary sleeve 3 are symmetrically and fixedly arranged on the periphery of the joint of the composite steel pipe through adjustable fixing pipe fittings 4 along the end surfaces, the end surfaces of the steel sleeve main sleeve 2 and the steel sleeve auxiliary sleeve 3 are welded, sealed and fixed, a filling cavity is formed between the inner part of a sealing assembly of the steel sleeve main sleeve 2 and the steel sleeve auxiliary sleeve 3 and the periphery of the joint of the composite steel pipe, and a straight plate of the T-shaped rigid frame 1b penetrates through the joint of the steel sleeve main sleeve 2 and the steel sleeve auxiliary sleeve 3 along the radial direction and is fixedly clamped by the straight plate;
the friction increasing ring 5 is coaxially arranged in the step edge 1a1, and the outer diameter of the friction increasing ring 5 is not larger than that of the steel base pipe A;
and the filling material 6 is filled in a filling cavity formed by the periphery of the joint of the inside of the steel sleeve main sleeve 2 and the steel sleeve auxiliary sleeve 3 and the composite steel pipe.
When the steel sleeve main sleeve 2 and the steel sleeve auxiliary sleeve 3 work, the end faces of the steel sleeve main sleeve 2 and the steel sleeve auxiliary sleeve 3 are arranged at two ends of two composite steel pipes in a sliding mode relatively through the adjustable fixing pipe fittings 4, and the working ends of the adjustable fixing pipe fittings 4 are not locked, so that the steel sleeve main sleeve 2 and the steel sleeve auxiliary sleeve 3 can freely slide on the composite steel pipes sleeved with the steel sleeve main sleeve 2 and the steel sleeve auxiliary sleeve 3 along the axial direction;
aligning the end faces of two composite steel pipes to be connected coaxially;
the friction increasing ring 5 is coaxially arranged on the step edge 1a1, so that the end surface A of the steel base tube and the end surface of the connecting ring 1a are not easy to axially rotate, and the structure is more stable;
then the plastic joint 1 is coaxially fixed at the port B of the lining plastic pipe, so that the steel base pipe A is coaxially abutted against the two ends of the connecting ring 1 a;
sliding the steel sleeve main sleeve 2 and the steel sleeve auxiliary sleeve 3 to align the end faces of the two sleeves, enabling a straight plate of the T-shaped rigid frame 1b to penetrate through the end faces in the radial direction, pulling the outer end of the straight plate of the T-shaped rigid frame 1b through a support, enabling the two side plates of the T-shaped rigid frame 1b to drive the plastic joint 1 to slightly deform and expand so as to be tightly attached to the inner circumference of the port of the composite steel pipe, enabling the steel sleeve main sleeve 2 and the steel sleeve auxiliary sleeve 3 to be respectively fixed at the ends of the two composite steel pipes through the adjustable fixing pipe fitting 4, enabling the end faces of the steel sleeve auxiliary sleeve 3 and the adjustable fixing pipe fitting 4 to be in coaxial abutting connection, and clamping the outer end of the straight plate of the T-shaped rigid frame 1b together through the abutting connection of the two side plates of the T-shaped rigid frame 1b and the fixed composite steel pipe with the sleeves relatively stable;
and welding abutting surfaces of the steel sleeve main sleeve 2 and the steel sleeve auxiliary sleeve 3, so that the steel sleeve main sleeve 2 and the steel sleeve auxiliary sleeve 3 are welded into an assembly, a filling cavity is formed at the periphery of the joint of the assembly and the composite steel pipe, and filling materials 6 are injected into the filling cavity and cured, so that the full-corrosion-resistant connection work of the composite steel pipe is completed.
As shown in fig. 6, the T-shaped rigid frame 1b includes:
the arc plates 1b1 are uniformly distributed in the plastic joint 1 coaxially, and the arc plates 1b1 are uniformly distributed in the plastic joint 1;
the pulling plate 1b2, the pulling plate 1b2 is fixedly arranged at the centre position of the extrados of the arc plate 1b1 along the radial direction and penetrates through the connecting ring 1 a.
Arc board 1B1 is coaxial with plastic connector 1, plastic connector 1 coaxial butt fusion is in inside lining plastic tube B, and steel parent tube A and inside lining plastic tube B both ends coaxial butt when radially outwards pulling the arm-tie 1B2 at coupling ring 1a both ends, plastic connector 1 takes place to receive arc board 1B1 effect to take place deformation, thereby the butt is at inside lining plastic tube B port internal periphery, thereby make T type rigid frame 1B and steel sleeve owner sleeve pipe 2 and the vice sleeve pipe 3 formation stabilizing element of steel sleeve, thereby make compound steel pipe junction more stable.
As shown in fig. 4, both ends of the inner circumferential surface of the plastic joint 1 are provided with tapered edges 1c having diameters gradually increasing from the inside to the outside.
Both ends of the inner circumferential surface of the plastic joint 1 are provided with inclined edges 1c with diameters gradually increasing from inside to outside, so that when liquid circulates from the composite steel pipe, the liquid is not easy to impact the two end surfaces of the plastic joint 1 along the axial direction, and the liquid can stably pass through the plastic joint 1.
As shown in fig. 4, the top of the steel sleeve main sleeve 2 is provided with a filling port 2a penetrating in the radial direction, and the filling port 2a is used for filling a filling cavity formed on the connection periphery of the steel sleeve main sleeve 2, the steel sleeve auxiliary sleeve 3 and the composite steel pipe with filling material 6.
And the top of the steel sleeve main sleeve 2 is provided with an injection port 2a which penetrates through the steel sleeve main sleeve along the radial direction, so that after the welding of the steel sleeve main sleeve 2 and the steel sleeve auxiliary sleeve 3 is finished, a filling material 6 is injected into a filling cavity formed by the connection periphery of the composite steel pipe and the combination body of the steel sleeve main sleeve 2 and the steel sleeve auxiliary sleeve 3 through the injection port 2a, and the welding is facilitated.
As shown in fig. 9, the adjustable fixing tube 4 includes:
the fixing sleeve 4a is respectively and coaxially arranged at one end of the steel sleeve main sleeve 2 and one end of the steel sleeve auxiliary sleeve 3, the inner diameter of the fixing sleeve 4a is not smaller than the outer diameter of the steel base tube A, open grooves 4a1 along the axial direction are uniformly distributed on the fixing sleeve 4a, and the outer circumferential surface of the fixing sleeve 4a is provided with an external thread conical surface 4a2 with the wide end facing the sleeve;
and the inner circumferential surface of the rotating sleeve 4b is sequentially provided with an internal thread conical surface 4b1 and a smooth conical surface 4b2, the wide end and the narrow end of the internal thread conical surface 4b1 are connected with the external thread conical surface 4a2 in a coaxial threaded manner, and the taper of the smooth conical surface 4b2 is larger than that of the internal thread conical surface 4b 1.
When the rotating sleeve 4b is rotated, the internal thread conical surface 4b1 is screwed with the external thread conical surface 4a2 coaxially, so that the rotating sleeve 4b moves relative to the fixed sleeve 4a along the axial direction, the fixed sleeve 4a is provided with an open slot 4a1 along the axial direction, the smooth conical surface 4b2 is connected with the internal thread conical surface 4b1, the taper of the smooth conical surface 4b2 is larger than that of the internal thread conical surface 4b1, the internal thread conical surface 4b1 is contracted inwards along the radial direction, the fixed sleeve 4a hoops the periphery of the composite steel pipe, and the steel sleeve main sleeve 2 and the steel sleeve auxiliary sleeve 3 can be coaxially and fixedly arranged on the periphery of the composite steel pipe and the positions of the steel sleeve main sleeve and the steel sleeve auxiliary sleeve can be adjusted conveniently.
As shown in fig. 9, the adjustable fixed pipe fitting 4 further includes fixed blocks 4c, the fixed blocks 4c are uniformly distributed on the outer circumferential surface of the rotating sleeve 4b along the circumferential direction, and the fixed blocks 4c are provided with insertion holes 4c1 along the radial direction of the fixed sleeve 4 a.
As shown in fig. 10, the friction increasing ring 5 is a wave washer, and the distance between both ends of the friction increasing ring 5 is greater than the axial width of the step edge 1a 1.
Increase and rub circle 5 and be the wave form packing ring to make and increase 5 both ends wave crests of circle and can play the effect of increase frictional force, thereby prevent the relative compound steel pipe coaxial rotation of connecting ring 1a, and because of increasing 5 both ends distances of circle of rubbing and be greater than the ladder along 1a1 along axial width, thereby make to have elastic buffer power between two compound steel pipes, thereby make connection structure more stable.
As shown in FIG. 3, the width of the filling material 6 along the two axial sides of the composite steel pipe is smaller than the axial width of the plastic joint 1.
The width of the filling material 6 along the two axial sides of the composite steel pipe is smaller than the axial width of the plastic joint 1, so that when the filling material 6 in a molten state covers the outer periphery of the composite steel pipe, the plastic joint 1 can be completely abutted against the inner periphery of the composite steel pipe heating area, the inner periphery of the lining plastic pipe B is not prone to thermal deformation, and the connecting structure is more stable.
As shown in fig. 6 and 7, the two sides of the pulling plate 1b2 are uniformly provided with limiting teeth 1b3 which are coaxial with the plastic joint 1 along the radial direction of the composite steel pipe at equal intervals, and the outer end of the pulling plate 1b2 is provided with a through hole 1b4 which is coaxial with the plastic joint 1; first sliding grooves 2b radially penetrate through the end face of the steel sleeve main sleeve 2, and first limiting grooves 2b1 coaxial with the first sliding grooves 2b are uniformly distributed in the first sliding grooves 2b at equal intervals; the end face of the auxiliary sleeve 3 of the steel sleeve is uniformly provided with second sliding grooves 3a which penetrate through the sleeve along the radial direction, second limiting grooves 3b which are coaxial with the second sliding grooves 3a are uniformly distributed in the second sliding grooves 3a at equal intervals, and in a working state, the pulling plate 1b2 is clamped in the limiting grooves along the radial direction through limiting teeth 1b 3.
When the arm-tie 1B2 joint was in first spout 2B and second spout 3a, pull arm-tie 1B2 through-hole 1B4 along radial for T type rigid frame 1B can be with steel sleeve owner sleeve pipe 2 slight deformation thereby the butt is at inside lining plastic tubing B internal week, and through-hole 1B4 with first spacing groove 2B1 and the meshing of second spacing groove 3B joint, thereby make when no longer pulling arm-tie 1B2, T type rigid frame 1B is difficult along radial reseing under limiting displacement, thereby makes connection structure more stable.
A full anti-corrosion connection structure for bacteriostatic lining plastic composite steel pipes and a construction method thereof comprise the following steps:
firstly, in work, the end surfaces of a steel sleeve main sleeve 2 and a steel sleeve auxiliary sleeve 3 are arranged at two ends of two composite steel pipes in a sliding mode through adjustable fixed pipe fittings 4 oppositely;
step two, aligning the end faces of two composite steel pipes to be connected coaxially;
step three, the friction increasing ring 5 is coaxially arranged on the step edge 1a 1;
step four, the plastic joint 1 is coaxially fixed at the port B of the lining plastic pipe, so that the steel base pipe A is coaxially abutted against the two ends of the connecting ring 1 a;
sliding the steel sleeve main sleeve 2 and the steel sleeve auxiliary sleeve 3 to enable the end faces of the steel sleeve main sleeve 2 and the steel sleeve auxiliary sleeve 3 to be aligned, enabling a straight plate of the T-shaped rigid frame 1b to penetrate through the end faces in the radial direction, pulling the outer end of the pull plate 1b2 through a support, enabling the arc plate 1b1 to drive the plastic connector 1 to slightly deform and expand to be tightly attached to the inner periphery of the port of the composite steel pipe, enabling the fixed sleeve 4a to deform and tighten through rotating the rotating sleeve 4b, enabling the steel sleeve main sleeve 2 and the steel sleeve auxiliary sleeve 3 to be fixed at the ends of the two composite steel pipes respectively, enabling the end faces of the steel sleeve main sleeve and the steel sleeve auxiliary sleeve to be in coaxial abutting connection, enabling the first sliding groove 2b and the second sliding groove 3a to abut against to jointly clamp the pull plate 1b2, and enabling the pull plate 1b2 and the sleeve to be relatively stable and fixed at the joint of the composite steel pipe;
and step six, welding abutting surfaces of the steel sleeve main sleeve 2 and the steel sleeve auxiliary sleeve 3, so that the steel sleeve main sleeve 2 and the steel sleeve auxiliary sleeve 3 are welded into a combined piece, a filling cavity is formed at the periphery of the joint of the combined piece and the composite steel pipe, and filling materials 6 are injected into the filling cavity through the injection opening 2a and are cured, so that the full-corrosion-proof connection work of the composite steel pipe is completed.
The working principle of the invention is as follows:
the device realizes the functions of the invention through the following steps, thereby solving the technical problems provided by the invention:
firstly, in work, the end faces of a steel sleeve main sleeve 2 and a steel sleeve auxiliary sleeve 3 are arranged at two ends of two composite steel pipes in a sliding mode relatively through an adjustable fixed pipe fitting 4, and the working end of the adjustable fixed pipe fitting 4 is not locked, so that the steel sleeve main sleeve 2 and the steel sleeve auxiliary sleeve 3 can freely slide on the composite steel pipes sleeved with the steel sleeve main sleeve 2 and the steel sleeve auxiliary sleeve in the axial direction;
step two, aligning the end faces of two composite steel pipes to be connected coaxially;
step three, the friction increasing ring 5 is coaxially arranged on the step edge 1a1, so that the end surface A of the steel base tube and the end surface of the connecting ring 1a are not easy to axially rotate, and the structure is more stable;
step four, the plastic joint 1 is coaxially fixed at the port B of the lining plastic pipe, so that the steel base pipe A is coaxially abutted against the two ends of the connecting ring 1 a;
sliding the steel sleeve main sleeve 2 and the steel sleeve auxiliary sleeve 3 to enable the end faces of the steel sleeve main sleeve 2 and the steel sleeve auxiliary sleeve 3 to be aligned, enabling a straight plate of a T-shaped rigid frame 1b to penetrate through the end faces in the radial direction, pulling the outer end of a pulling plate 1b2 through a support, enabling an arc plate 1b1 to drive a plastic joint 1 to slightly deform and expand so as to be tightly attached to the inner periphery of a port of a composite steel pipe, enabling a fixing sleeve 4a to deform and tighten through rotating a rotating sleeve 4b, enabling the steel sleeve main sleeve 2 and the steel sleeve auxiliary sleeve 3 to be respectively fixed at the ends of two composite steel pipes, enabling the end faces of the steel sleeve main sleeve and the steel sleeve auxiliary sleeve to be coaxially abutted, enabling a first sliding groove 2b and a first sliding groove 2c0 to abut against and jointly clamp a pulling plate 1b2, and enabling the pulling plate 1b2 to be relatively stably fixed at the joint of the composite steel pipes;
and step six, welding abutting surfaces of the steel sleeve main sleeve 2 and the steel sleeve auxiliary sleeve 3, so that the steel sleeve main sleeve 2 and the steel sleeve auxiliary sleeve 3 are welded into a combined piece, a filling cavity is formed at the periphery of the joint of the combined piece and the composite steel pipe, and filling materials 6 are injected into the filling cavity through the injection opening 2a and are cured, so that the full-corrosion-proof connection work of the composite steel pipe is completed.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a full corrosion-resistant connection structure for compound steel pipe is moulded to bacterial inhibition type lining, compound steel pipe is including steel parent tube (A) and inside lining plastic tubing (B), its characterized in that, including:
the plastic joint (1) is coaxially and fixedly arranged at the opposite ends of the two composite steel pipes, a connecting ring (1a) with the outer diameter not smaller than the outer diameter of the composite steel pipes is arranged on the outer circumferential surface of the plastic joint (1), the steel base pipe (A) and the lining plastic pipe (B) are coaxially abutted to the two ends of the connecting ring (1a), step edges (1a1) coincident with the axial projection surface of the steel base pipe (A) are further arranged at the two ends of the connecting ring (1a), T-shaped rigid frames (1B) with straight plates penetrating through the connecting ring (1a) along the radial direction of the plastic joint (1) are further uniformly distributed in the plastic joint (1), and two side plates of the T-shaped rigid frames (1B) are located in the plastic joint (1);
the steel sleeve main sleeve (2) and the steel sleeve auxiliary sleeve (3) are symmetrically and fixedly arranged on the periphery of the joint of the composite steel pipe through adjustable fixing pipe fittings (4) along the end faces, the end faces of the steel sleeve main sleeve (2) and the steel sleeve auxiliary sleeve (3) are welded, sealed and fixed, a filling cavity is formed between the inner part of a sealing assembly of the steel sleeve main sleeve (2) and the steel sleeve auxiliary sleeve (3) and the periphery of the joint of the composite steel pipe, and a straight plate of the T-shaped rigid frame (1b) penetrates through the connecting end of the steel sleeve main sleeve (2) and the steel sleeve auxiliary sleeve (3) along the radial direction and is fixedly clamped by the connecting end;
the friction increasing ring (5) is coaxially arranged in the step edge (1a1) and the outer diameter of the friction increasing ring (5) is not larger than that of the steel base pipe (A);
and the filling material (6) is filled in a filling cavity formed by the inner part of the steel sleeve main sleeve (2) and the steel sleeve auxiliary sleeve (3) sealing assembly and the periphery of the joint of the steel pipe.
2. The full corrosion-resistant connection structure for the bacteriostatic lining plastic composite steel pipe according to claim 1, wherein the T-shaped rigid frame (1b) comprises:
the arc plates (1b1), the arc plates (1b1) are coaxially and uniformly distributed in the plastic joint (1);
the pulling plate (1b2), the pulling plate (1b2) is fixedly arranged at the centre position of the extrados of the arc plate (1b1) along the radial direction and penetrates through the connecting ring (1 a).
3. The full corrosion-proof connection structure for the bacteriostatic lining plastic composite steel pipe according to claim 1, wherein both ends of the inner circumferential surface of the plastic joint (1) are provided with inclined edges (1c) with gradually increasing diameters from inside to outside.
4. The full corrosion-resistant connection structure for the bacteriostatic plastic-lined composite steel pipe according to claim 1, wherein the top of the steel sleeve main sleeve (2) is provided with an injection port (2a) penetrating along the radial direction, and the injection port (2a) is used for injecting the filler (6) into the filling cavity formed at the periphery of the connection part of the steel sleeve main sleeve (2) and the steel sleeve auxiliary sleeve (3) and the composite steel pipe.
5. The structure of claim 2, wherein the adjustable fixing pipe (4) comprises:
the fixing sleeve (4a) is coaxially arranged at one end of the steel sleeve main sleeve (2) and one end of the steel sleeve auxiliary sleeve (3) respectively, the inner diameter of the fixing sleeve (4a) is not smaller than the outer diameter of the steel base tube (A), open grooves (4a1) along the axial direction are uniformly distributed on the fixing sleeve (4a), and the outer circumferential surface of the fixing sleeve (4a) is provided with an external thread conical surface (4a2) with a wide end facing the sleeve;
the inner circumferential surface of the rotating sleeve (4b) is sequentially provided with an internal thread conical surface (4b1) and a smooth conical surface (4b2), the wide ends and the narrow ends of the internal thread conical surface are connected, the internal thread conical surface (4b1) and the external thread conical surface (4a2) are coaxially screwed, and the taper of the smooth conical surface (4b2) is larger than that of the internal thread conical surface (4b 1).
6. The full corrosion-resistant connection structure for the bacteriostatic plastic-lined composite steel pipe according to claim 5, wherein the adjustable fixed pipe fitting (4) further comprises fixed blocks (4c), the fixed blocks (4c) are uniformly distributed on the outer circumferential surface of the rotating sleeve (4b) along the circumferential direction, and the fixed blocks (4c) are provided with inserting holes (4c1) along the radial direction of the fixed sleeve (4 a).
7. The full corrosion-resistant connection structure for the bacteriostatic plastic-lined composite steel pipe according to claim 5, wherein the friction-increasing ring (5) is a wave washer, and the distance between the two ends of the friction-increasing ring (5) is greater than the axial width of the step edge (1a 1).
8. The full corrosion-proof connection structure for the bacteriostatic lining plastic composite steel pipe according to claim 5, wherein the width of the filling material (6) along the two axial sides of the composite steel pipe is smaller than the axial width of the plastic joint (1).
9. The full corrosion-resistant connecting structure for the bacteriostatic lining plastic composite steel pipe according to claim 5, wherein the two sides of the pulling plate (1b2) are uniformly distributed with limiting teeth (1b3) which are coaxial with the plastic joint (1) along the radial direction of the composite steel pipe at equal intervals, and the outer end of the pulling plate (1b2) is provided with a through hole (1b4) which is coaxial with the plastic joint (1); first sliding grooves (2b) radially penetrating through the end face of the steel sleeve main sleeve (2) are uniformly distributed, and first limiting grooves (2b1) coaxial with the first sliding grooves are uniformly distributed in the first sliding grooves (2b) at equal intervals; the end face of the auxiliary sleeve (3) is uniformly provided with second sliding grooves (3a) which penetrate through the auxiliary sleeve along the radial direction, second limiting grooves (3b) which are coaxial with the second sliding grooves are uniformly distributed in the second sliding grooves (3a) at equal intervals, and the pulling plate (1b2) is clamped in the limiting grooves along the radial direction through limiting teeth (1b3) in the working state.
10. The construction method of the full corrosion-proof connection structure for the bacteriostatic lining plastic composite steel pipe according to any one of claims 5 to 9, characterized by comprising the following steps:
firstly, in work, the end surfaces of a steel sleeve main sleeve (2) and a steel sleeve auxiliary sleeve (3) are arranged at two ends of two composite steel pipes in a sliding mode through adjustable fixing pipe fittings (4) relatively;
step two, aligning the end faces of two composite steel pipes to be connected coaxially;
step three, the friction increasing ring (5) is coaxially arranged on the step edge (1a 1);
step four, the plastic joint (1) is coaxially fixed at the port of the lining plastic pipe (B), so that the steel base pipe (A) is coaxially abutted against the two ends of the connecting ring (1 a);
sliding the steel sleeve main sleeve (2) and the steel sleeve auxiliary sleeve (3) to enable the end faces of the steel sleeve main sleeve and the steel sleeve auxiliary sleeve to be aligned, enabling a pulling plate (1b2) of the T-shaped rigid frame (1b) to penetrate through the end faces in the radial direction, enabling the arc plate (1b1) to drive the plastic joint (1) to slightly deform and expand to be tightly attached to the inner circumference of the port of the composite steel pipe through pulling the outer end of the pulling plate (1b2) through the support, enabling the fixing sleeve (4a) to deform and tighten through rotating the rotating sleeve (4b), enabling the steel sleeve main sleeve (2) and the steel sleeve auxiliary sleeve (3) to be respectively fixed at the ends of the two composite steel pipes, enabling the end faces of the two composite steel pipes to be coaxially abutted, enabling the first sliding groove (2b) and the second sliding groove (3a) to abut against the common clamping pulling plate (1b2), and enabling the pulling plate (1b2) and the sleeve to be relatively stable and fixed at the joint of the composite steel pipe;
and step six, welding the butt joint surfaces of the steel sleeve main sleeve (2) and the steel sleeve auxiliary sleeve (3) so as to enable the steel sleeve main sleeve (2) and the steel sleeve auxiliary sleeve (3) to be welded into a combined piece, forming a filling cavity at the periphery of the joint of the combined piece and the composite steel pipe, and injecting filling materials (6) into the filling cavity through the injection port (2a) and curing to complete the full-corrosion-proof connection work of the composite steel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011501802.2A CN112610782B (en) | 2020-12-18 | 2020-12-18 | Full-corrosion-resistant connecting structure for bacteriostatic lining plastic composite steel pipe and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011501802.2A CN112610782B (en) | 2020-12-18 | 2020-12-18 | Full-corrosion-resistant connecting structure for bacteriostatic lining plastic composite steel pipe and construction method thereof |
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| CN112610782A CN112610782A (en) | 2021-04-06 |
| CN112610782B true CN112610782B (en) | 2022-06-14 |
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