Composite plastic-coated anticorrosive pipeline for nuclear power and pipeline plastic-coated paint

Abstract

The present application relates to the technical field of pipeline connection, in particular to a composite plastic-impregnated anti-corrosion pipeline for nuclear power and pipeline plastic-impregnated coating, comprising a receiving pipe and a second pipe section, both ends of the receiving pipe are provided with knuckle joints, both knuckle joints are connected with the second pipe section on the side far away from each other, the knuckle joint comprises an end sleeve and a spherical core body, the end sleeve is arranged at the end of the receiving pipe, the end sleeve has a spherical cavity, the spherical core body is movably embedded in the spherical cavity and partially exposed to the outside from the end face of the end sleeve, and the spherical core body is provided with a through communication hole. The meshing transmission of the worm and the worm gear in the adjusting mechanism can drive the spherical core body to rotate and adjust the angle in the spherical cavity, drive the second pipe section to turn synchronously, realize the multi-angle adjustment of the pipeline non-ninety-degree turning, do not need to design and process the non-standard angle turning pipe separately, reduce the cost, solve the adaptation problem caused by the error between the design angle and the actual assembly angle, reduce the on-site finishing, and improve the assembly efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline connection, in particular to a composite dip-coated anti-corrosion pipeline for nuclear power and pipeline dip-coated paint. BACKGROUND

[0002] The composite dip-coated anti-corrosion pipeline for nuclear power is a special pipeline designed for the complex working conditions of nuclear power plants. The pipeline has a metal pipe as a base layer, and a layer of high polymer plastic coating is uniformly covered on the inner and outer surfaces of the base layer through a dip-coating process, forming a composite structure of metal strength plus plastic corrosion resistance. The pipeline has excellent radiation resistance, high temperature resistance and chemical corrosion resistance. The coating has no joints and strong adhesion, can effectively resist the corrosion of the medium in the nuclear power system, and can ensure the long-term safe and stable operation of the pipeline. The pipeline is widely used in water supply and drainage, process medium transportation and other systems of the nuclear island and the conventional island, and can meet the stringent requirements of the nuclear power industry on pipeline safety, reliability and service life, while reducing maintenance costs and improving system operation efficiency.

[0003] When the nuclear pipeline is transported in reverse, the adjacent two pipelines are usually connected by a reversing pipe. The common reversing pipe is generally a ninety-degree reversing pipe. In the actual pipeline deployment process, there may be non-ninety-degree reversing of the pipeline, which requires the corresponding angle reversing pipe to be provided. The ninety-degree reversing pipe can be regarded as a standard part and can be produced in a standardized manner, while the non-ninety-degree reversing pipe needs to be designed and processed according to the actual angle, which is more costly.

[0004] In addition, there is usually an error between the designed angle and the actual assembly angle. Once the angle of the reversing pipe is determined, it may not be suitable for assembly in the actual assembly process, and the reversing pipe often needs to be trimmed on site, which is time-consuming and labor-intensive, resulting in low pipeline assembly efficiency. SUMMARY

[0005] The present application aims to provide a composite dip-coated anti-corrosion pipeline for nuclear power and pipeline dip-coated paint to solve the technical problems raised in the background.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions.

[0007] A composite dip-coated anti-corrosion pipeline for nuclear power comprises a receiving pipe and a second pipe section. The receiving pipe is provided with a universal joint at both ends. The two universal joints are connected with the second pipe section on the side away from each other. The universal joint comprises an end sleeve and a spherical core. The end sleeve is arranged at the end of the receiving pipe, and the end sleeve has a spherical cavity. The spherical core is movably embedded in the spherical cavity, and part of the spherical core is exposed to the outside from the end face of the end sleeve. The spherical core is provided with a through communication hole. The second pipe section is fixed on the outer wall of the spherical core and communicates with the communication hole. The end sleeve is provided with an adjusting mechanism for driving the spherical core to rotate and adjust. The second pipe section is provided with a non-return mechanism.

[0008] Preferably, the adjusting mechanism comprises a worm gear and a worm, a shaft is fixed on the outer wall of the ball core body, the shaft penetrates the end sleeve radially to the outside, the shaft is rotatably connected with the end sleeve, the worm gear is fixed on the outer end of the shaft, a support is fixed on the outer wall of the end sleeve, the worm is rotatably installed on the support and is in mesh with the worm gear.

[0009] Preferably, the inner diameter of the communication hole is smaller as it is closer to the second pipe section.

[0010] Preferably, the receiving pipe comprises a plug-in pipe section and a pair of first pipe sections, a first fixed ring is fixed on one end of the first pipe section, a second fixed ring is fixed on the other end of the first pipe section, one end of the plug-in pipe section is fixed on the first fixed ring, and the other end is slidably inserted into the other first pipe section, a threaded hole is provided on the second fixed ring, an adjusting screw is rotatably installed on the first fixed ring, the adjusting screw is threadedly and penetratingly installed in the threaded hole, and two end sleeves are installed on the ends of the two first pipe sections away from each other.

[0011] Preferably, the two non-return mechanisms are arranged in the same direction, the non-return mechanism comprises an inner core body, a floating core and a blocking plate, the inner core body is fixed in the second pipe section, a hole is provided in the inner core body and extends through the second pipe section in the length direction, a receiving hole is provided above the hole in the inner core body, a receiving groove is provided downstream of the receiving hole in the inner core body, a communication groove is provided between the receiving hole and the receiving groove, the floating core is used to block the hole and is limitingly and slidably installed in the receiving hole, the blocking plate is used to block the hole downstream of the floating core and is limitingly and slidably installed in the receiving groove, and a connecting rod is installed in the communication groove, one end of the connecting rod is fixed with the floating core, and the other end of the connecting rod is fixed with the blocking plate.

[0012] Preferably, the receiving hole and the hole are of the same diameter and correspondingly arranged, the width of the receiving groove corresponds to the inner diameter of the hole, the floating core is composed of a hemisphere and a cylinder fixed on the top of the hemisphere, the hemisphere is matched with the hole, and the cylinder is matched with the receiving hole, the blocking plate is composed of a semicircular body and a rectangular body fixed on the top of the semicircular body, the semicircular body is matched with the hole, and the rectangular body is matched with the receiving groove.

[0013] Preferably, the end sleeve is rotatably installed at the end of the first pipe section, the outer wall of the two first pipe sections is provided with an outer threaded portion, the outer threaded portion is matched with an inner threaded ring, the inner threaded ring is provided with a second sliding hole extending in the length direction of the first pipe section, a second guide rod is slidably inserted into the second sliding hole, and the second guide rod is fixedly connected with the end sleeve on the corresponding side.

[0014] Preferably, the nuclear power composite immersion plastic anti-corrosion pipeline and pipeline immersion plastic coating are also provided with a transmission rod, the transmission rod comprises a square slide rod and a square clamping rod, the square clamping rod is provided with a square hole, the square slide rod is slidably inserted into the square hole of the square clamping rod, springs are arranged in the square holes, one end of the spring is fixed to the end of the square slide rod in the square hole, the other end is fixed to the end wall of the square hole, and the ends of the two worms close to each other are fixedly provided with a handle, and square clamping holes are arranged on the end faces of the two handles for matching and clamping the square clamping rod.

[0015] Preferably, the first fixed ring is uniformly provided with a first sliding hole, and the first fixed ring is uniformly provided with a first guide rod, and each first guide rod is slidably inserted into the first sliding hole.

[0016] A kind of composite immersion plastic anti-corrosion pipeline immersion plastic coating, the immersion plastic coating is polytetrafluoroethylene coating, the polytetrafluoroethylene coating is composed of the following mass fraction of raw materials: polytetrafluoroethylene concentrated dispersion 150 parts, phthalate coupling agent 0.003 parts, defoaming agent 0.008 parts, leveling agent 0.006 parts, alcohol ester twelve 0.015 parts 8 parts, tin bronze mixture of chromium sesquioxide 18 parts, inorganic pigment 5 parts, inorganic modifier 0.003 parts, preservative and anti-sedimentation agent 0.003 parts.

[0017] Compared with the prior art, the beneficial effects of the present application are as follows.

[0018] By adjusting the meshing transmission of the worm and the worm gear in the adjusting mechanism, the ball core body can be driven to rotate in the spherical cavity to adjust the angle, and the second pipe section is synchronously turned, so that multi-angle adjustment of the pipeline is realized without the need of separately designing and processing non-standard angle turning pipes, the cost is reduced, the fitting problem caused by the error between the design angle and the actual assembly angle is solved, the on-site trimming is reduced, and the assembly efficiency is improved.

[0019] The meshing transmission of the worm and the worm gear in the adjusting mechanism has a self-locking effect, can maintain the angle state of the ball core body after adjustment, avoids the ball core body from being randomly deflected and losing position when not being rotated and adjusted, guarantees the accuracy and stability of the turning angle of the pipeline, and solves the problem that the angle of the traditional turning pipe is easily changed to affect the operation of the pipeline system.

[0020] The receiving pipe is adjusted by rotating the adjusting screw rod, the first fixed ring and the first pipe section are axially translated under the thread cooperation of the adjusting screw rod and the threaded hole, the pipe section is slidably extended and retracted in the first pipe section on the other side, the overall length of the receiving pipe is adjusted, the position adjustment demand during actual installation of the pipeline is met, the on-site processing due to unsuitable length is reduced, and the installation convenience is improved.

[0021] The reverse prevention mechanism in the two second pipe sections falls back to block the hole under the action of gravity when there is no medium flow, so that welding spatter is avoided from falling in; when medium is transported, the floating core drives the blocking plate to go up to cancel the blocking under the action of buoyancy, so that backflow of downstream medium is prevented, double backflow prevention is realized, the safety of the pipeline system is ensured, and the problems of welding spatter cleaning and medium backflow during welding are solved.

[0022] The end sleeve can rotate around the first pipe section axis, the screw inner thread ring is screwed to drive the end sleeve to rotate through the cooperation of the second guide rod and the second sliding hole, the ball core body is adjusted in the second dimension, the ball core body is driven to adjust in the first dimension by the adjusting mechanism, double-dimension angle flexible and free adjustment is realized, the adaptation ability is stronger, and the problems of single angle adjustment and difficult adaptation to complex assembly scenes of the traditional reversing pipe are solved.

[0023] Among the matched transmission rods, the two square clamping rods are clamped into the two square clamping holes, one side of the worm can drive the other side of the worm to rotate synchronously through the transmission rod, so that the two ball core bodies rotate the same angle, the symmetrical arrangement during the pipeline reversing connection is adapted, the angle consistency is ensured, the efficiency and accuracy during symmetrical installation are improved, and the adjustment error is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a whole structure perspective view of the present application;

[0025] Figure 2 It is a structure cross-section view as shown in the figure; Figure 1

[0026] Figure 3 It is a detailed structure view of the adjusting mechanism in the present application;

[0027] Figure 4 It is a structure cross-section view as shown in the figure; Figure 3

[0028] It is a structure cross-section view as shown in the figure; Figure 5

[0029] It is a detailed structure view of the reverse prevention mechanism in the present application; Figure 6

[0030] It is a structure cross-section view as shown in the figure; Figure 7

[0031] It is a structure cross-section view as shown in the figure; Figure 8 Figure 7 It is a structure cross-section view as shown in the figure;

[0032] Figure 9 It is an asymmetric adjusting view of the two knuckles;

[0033] Figure 10 It is a symmetrical adjusting view of the two knuckles. ​​

[0034] Figure: 1, the receiving pipe; 11, the first pipe section; 12, the first fixed ring; 13, the cannula section; 14, the adjusting screw; 15, the second fixed ring; 151, the threaded hole; 152, the first sliding hole; 16, the first guide rod; 2, the knuckle; 21, the end sleeve; 211, the spherical cavity; 22, the ball core; 221, the communication hole; 23, the adjusting mechanism; 231, the shaft; 232, the worm gear; 233, the bracket; 234, the worm; 235, the handle; 236, the square clamping hole; 3, the second pipe section; 4, the internally threaded ring; 401, the externally threaded part; 41, the second sliding hole; 42, the second guide rod; 43, the handle; 5, the non-return mechanism; 51, the inner core; 511, the hole; 512, the receiving hole; 513, the receiving groove; 514, the communication groove; 52, the floating core; 521, the hemisphere; 522, the cylinder; 53, the blocking plate; 531, the semicircular body; 532, the rectangular body; 54, the connecting rod; 6, the transmission rod; 61, the square clamping rod; 611, the square hole; 62, the square sliding rod; 63, the spring. DETAILED DESCRIPTION

[0035] The embodiments of the present application will be described below with reference to the accompanying drawings.

[0036] Embodiment 1

[0037] Please refer to Figures 1-10 , the present application provides a kind of composite dip plastic anticorrosive pipeline for nuclear power and pipeline dip coating, including receiving pipe 1 and second pipe section 3, receiving pipe 1 both ends are equipped with knuckle 2, two knuckles 2 are connected with second pipe section 3 on the side away from each other, receiving pipe 1, knuckle 2 and second pipe section 3 are formed part of nuclear pipeline, then the rest of the pipeline is respectively connected with the end of two second pipe section 3, that is, constitutes nuclear pipeline system, for conveying medium.

[0038] Among them, as shown in Figure 3 And Figure 4 , knuckle 2 includes end sleeve 21 and ball core 22, end sleeve 21 is arranged at the end of receiving pipe 1, end sleeve 21 has spherical cavity 211 inside, ball core 22 is movably embedded in spherical cavity 211, and part is exposed to the outside from the end face of end sleeve 21, that is, ball core 22 can be adjusted movably;

[0039] Ball core 22 is provided with through communication hole 221, second pipe section 3 is fixed on the outer wall of ball core 22 and communicates with communication hole 221, second pipe section 3, communication hole 221 and receiving pipe 1 constitute the channel of medium flow.

[0040] The end sleeve 21 is provided with an adjusting mechanism 23, and the ball core 22 can be driven to rotate and adjust by operating the adjusting mechanism 23, and the second pipe section 3 is synchronously rotated, so that the pipeline is reversed, and the two ball cores 22 can be adjusted at multiple angles according to the actual pipeline assembly needs, and the pipeline layout efficiency is improved.

[0041] In addition, the two second pipe sections 3 are provided with reverse stop mechanisms 5, and the two reverse stop mechanisms 5 block the two second pipe sections 3 when there is no medium flow, so that welding scraps cannot fall into the bending part and are difficult to clean when the second pipe section 3 is welded and fixed with other pipelines, and after the medium transportation is completed, the downstream medium can be prevented from flowing back to the upstream.

[0042] As shown in Figure 4 , Figure 9 and Figure 10 , the inner diameter of the communication hole 221 is smaller when it is closer to the second pipe section 3, and the inner diameter of the communication hole 221 is slightly larger on the side close to the receiving pipe 1, so that the area of the communication hole 221 that overlaps with the receiving pipe 1 after the ball core 22 is adjusted is not too small to affect the normal flow of the medium.

[0043] A kind of composite plastic-impregnated anticorrosion pipeline plastic-impregnated coating, the plastic-impregnated coating is polytetrafluoroethylene coating, the polytetrafluoroethylene coating is composed of the following mass fraction of raw materials: polytetrafluoroethylene concentrated dispersion liquid 150 parts, phthalate coupling agent 0.003 parts, defoaming agent 0.008 parts, leveling agent 0.006 parts, alcohol ester twelve 0.015 parts 8 parts, chromium sesquioxide and tin bronze mixture 18 parts, inorganic pigment 5 parts, inorganic modifier 0.003 parts, preservative and anti-sedimentation agent 0.003 parts.

[0044] Among them, the inorganic pigment is molybdenum dioxide, the preservative is Nordes C15, and the anti-sedimentation agent is organic bentonite.

[0045] The preparation process of the pipeline plastic-impregnated coating is:

[0046] First, take the above-mentioned parts of raw materials, and put the polytetrafluoroethylene concentrated dispersion liquid into a stirring container;

[0047] Secondly, under the condition of heating (45-50 DEG C), chromium sesquioxide and tin bronze mixture 18 parts, molybdenum dioxide, inorganic modifier, Nordes C15, and organic bentonite are added to the polytetrafluoroethylene concentrated dispersion liquid, and stirring is carried out, the stirring time is 35-40 min, and the stirring speed is 80-100 r / min;

[0048] Third step, phthalate ester coupling agent, defoaming agent and levelling agent are added in turn, one raw material is added each time, and stirring is carried out for 15-20 min, then the next raw material is continuously added, finally alcohol ester twelve is added, and stirring is carried out for 60-80 min, then static cooling is carried out to normal temperature state (22-25℃), and the pipeline dip coating is prepared.

[0049] The pipeline dip coating has the properties of sterilization and corrosion resistance, good film forming property, good coating hardness, wear resistance, weather resistance and impact resistance, and is suitable for the surface of the pipeline.

[0050] Example 2

[0051] The difference between this embodiment and example 1 is that:

[0052] Please refer to Figure 3 and Figure 4 The adjusting mechanism 23 comprises a worm wheel 232 and a worm 234, the outer wall of the ball core body 22 is fixed with a shaft 231, the shaft 231 penetrates to the outside along the radial direction of the end sleeve 21, the shaft 231 is rotationally connected with the end sleeve 21, the worm wheel 232 is fixed on the outer end of the shaft 231, the outer wall of the end sleeve 21 is fixed with a support 233, the worm 234 is rotationally installed on the support 233 and is in meshing correspondence with the worm wheel 232.

[0053] In addition, the two worms 234 are fixed with a wrench 235 at one end close to each other, which facilitates the screwing adjustment of the worm 234.

[0054] By screwing the worm 234, the rotating worm 234 drives the worm wheel 232 and drives the ball core body 22 to rotate, so as to realize the angle adjustment of the ball core body 22, that is, the steering of the pipe.

[0055] In addition, the worm 234 and the worm wheel 232 are transmission matched, have self-locking effect, when the angle of the ball core body 22 is adjusted to the appropriate position, the state of the ball core body 22 is maintained, so as to avoid the position misalignment of the ball core body 22 due to the random deflection of the ball core body 22 when the worm 234 is not screwed.

[0056] Example 3

[0057] Please refer to Figure 5 The difference between this embodiment and example 2 is that:

[0058] The adapter pipe 1 comprises a plug-in pipe section 13 and a pair of first pipe sections 11, one end of each first pipe section 11 is fixed with a first fixing ring 12, the other end of each first pipe section 11 is fixed with a second fixing ring 15, one end of the plug-in pipe section 13 is fixed on the first fixing ring 12, and the other end is matched and slidingly inserted into the other first pipe section 11, the second fixing ring 15 is provided with a threaded hole 151, the first fixing ring 12 is rotatably installed with an adjusting screw 14, the adjusting screw 14 is penetratingly and threadedly matched and installed in the threaded hole 151, and two end sleeves 21 are respectively installed on the ends of the two first pipe sections 11 away from each other;

[0059] By screwing the adjusting screw 14, the first fixing ring 12 and the first pipe section 11 fixed therewith can be axially translated under the thread cooperation of the adjusting screw 14 and the threaded hole 151, and then the plug-in pipe section 13 is slidingly adjusted in the other first pipe section 11, so that the distance between the two first pipe sections 11 is adjusted, and the overall length is adjusted to adapt to the position adjustment during actual installation of the pipeline.

[0060] In addition, the second fixing ring 15 is uniformly provided with a first sliding hole 152, the first fixing ring 12 is uniformly provided with a first guide rod 16, each first guide rod 16 is slidingly inserted into the first sliding hole 152 one by one, and the sliding cooperation of the first guide rod 16 and the first sliding hole 152 plays a guiding and limiting role, and also plays a role of reinforcing the structure.

[0061] Embodiment 4

[0062] Please refer to Figure 6 The difference between the present embodiment and embodiment 3 is that:

[0063] The two check mechanisms 5 are arranged in the same direction, the check mechanism 5 comprises an inner core body 51, a floating core 52 and a blocking plate 53, the inner core body 51 is matched and fixed in the second pipe section 3, the inner core body 51 is provided with a hole 511 extending through along the length direction of the second pipe section 3, the inner core body 51 is provided with a receiving hole 512 above the hole 511, and the inner core body 51 is provided with a receiving groove 513 downstream of the receiving hole 512, wherein the receiving hole 512 and the hole 511 are correspondingly arranged in the same diameter, and the width of the receiving groove 513 corresponds to the inner diameter of the hole 511;

[0064] The receiving hole 512 and the receiving groove 513 are communicated by a communication groove 514, the floating core 52 is used for blocking the hole 511 and is slidingly installed in the receiving hole 512, wherein the floating core 52 is composed of a hemisphere 521 and a cylindrical body 522 fixed on the top of the hemisphere 521, the hemisphere 521 is matched and adapted with the hole 511, and the cylindrical body 522 is matched and adapted with the receiving hole 512;

[0065] The blocking plate 53 is used to block the hole 511 on the downstream side of the floating core 52, and the top of the blocking plate 53 is slidingly installed in the receiving groove 513, and the connecting rod 54 is installed in the communication groove 514, wherein the blocking plate 53 is composed of a semicircular body 531 and a rectangular body 532 fixed on the top of the semicircular body 531, the semicircular body 531 is matched with the hole 511, and the rectangular body 532 is matched with the receiving groove 513;

[0066] One end of the connecting rod 54 is fixed with the floating core 52, and the other end is fixed with the blocking plate 53, the connecting rod 54 is used to fixedly connect the floating core 52 and the blocking plate 53, and is used to drive the blocking plate 53 to move synchronously when the floating core 52 moves up and down.

[0067] The specific working principle of the reverse stopping mechanism 5 is as follows:

[0068] When the second pipe section 3 is welded with other pipelines, at this time, there is no medium flow in the inside, under the action of gravity, the floating core 52 and the blocking plate 53 fall down, the hole 511 is blocked, and the welding debris is prevented from entering the inside;

[0069] When the medium flows, the cylindrical body 522 moves up along the inner wall of the receiving hole 512 due to the buoyancy, and drives the blocking plate 53 to move up synchronously under the fixed connection of the connecting rod 54, so that the hole 511 is unblocked, at this time, the pipeline inside is normally connected, so that the medium flows and is transported normally;

[0070] When there is no medium transportation, under the action of gravity, the floating core 52 and the blocking plate 53 fall down, when there is medium backflow on the downstream side, the medium contacts with the blocking plate 53, and the floating core 52 is located on the upstream side of the blocking plate 53 and does not contact with the medium, so it does not move up, and the floating core 52 and the blocking plate 53 still maintain the blocking state, and the double backflow prevention is realized by the two reverse stopping mechanisms 5 arranged in the second pipe sections 3.

[0071] Secondly, the hole 511 is arranged close to the inner wall bottom of the second pipe section 3, which is beneficial to the internal medium to be discharged to the downstream side, and avoids the internal medium to be excessively stored.

[0072] Example 5

[0073] As Figure 4Compared with Example 4, the difference of the present example lies in that the end sleeve 21 is correspondingly rotatably installed at the end of the first pipe section 11, i.e. the end sleeve 21 can rotate around the axis of the first pipe section 11, the outer wall of each of the first pipe sections 11 is provided with an outer threaded portion 401, and each of the outer threaded portions 401 is matched with and sleeved with an inner threaded ring sleeve 4, i.e. the inner threaded ring sleeve 4 is threadedly connected with the outer threaded portion 401, and each of the inner threaded ring sleeves 4 is uniformly provided with a second sliding hole 41 extending along the length direction of the first pipe section 11, and each of the second sliding holes 41 is slidably inserted with a second guide rod 42, and each of the second guide rods 42 is fixedly connected with the corresponding end sleeve 21.

[0074] In addition, the outer peripheral wall of each of the inner threaded ring sleeves 4 is uniformly provided with a handle 43, which facilitates the screwing of the inner threaded ring sleeve 4.

[0075] The ball core body 22 can be rotatably adjusted in the first dimension by the adjusting mechanism 23, and the inner threaded ring sleeve 4 can be moved along the axial direction of the first pipe section 11 by screwing the inner threaded ring sleeve 4. Under the cooperation of the second guide rod 42 and the second sliding hole 41, the end sleeve 21 can be synchronously rotated with the inner threaded ring sleeve 4, so that the ball core body 22 can be rotatably adjusted in the second dimension. The two-dimensional angle adjustment cooperation makes the bending angle adjustment more flexible and free, and the adaptation ability is stronger.

[0076] Example 6

[0077] Please refer to Figure 3 , Figure 6 and Figure 7 The difference between the present example and Example 5 lies in that:

[0078] The nuclear power composite dip plastic anti-corrosion pipeline and pipeline dip plastic coating of the present application further comprises a transmission rod 6, which comprises a square slide rod 62 and a square clamping rod 61. The square clamping rod 61 has a square hole 611 in it, and the square slide rod 62 is slidably inserted into the square hole 611 of the square clamping rod 61 at both ends. A spring 63 is arranged in the square hole 611, one end of the spring 63 is fixed to the end of the square slide rod 62 in the square hole 611, and the other end is fixed to the end wall of the square hole 611. Square clamping holes 236 are provided on the end faces of the two handle 235 for matching the square clamping rod 61.

[0079] During the installation of the nuclear pipeline, when two pipelines are connected in reverse, there may be a symmetrical arrangement, i.e. the rotation adjustment angles of the two ball core bodies 22 need to be consistent.

[0080] At the initial time, the two ball cores 22 are not adjusted in angle, at this time, the second pipe section 3, the end sleeve 21 and the first pipe section 11 form a linear pipeline, the two square clamping rods 61 are respectively clamped into the two square clamping holes 236, the positioning and clamping of the square clamping rod 61 and the square clamping hole 236 are realized, then one side of the worm 234 is rotated, through the transmission of the transmission rod 6, the other side of the worm 234 can be driven to rotate synchronously, the two sides of the knuckle 2 are symmetrically arranged, and then the two ball cores 22 can be driven to rotate the same angle, as shown in Figure 10 shown, to adapt to the symmetrically arranged case when the pipeline is connected in reverse.

[0081] In addition, Figure 9 shown is a diagram of a case of asymmetric adjustment of the two ball cores 22.

[0082] In addition, the two ends of the square slide rod 62 are elastically connected with the end walls in the square hole 611 through the spring 63, so that the two ends of the square slide rod 62 can be adjusted in extension and contraction relative to the square hole 611, to adapt to the adjustment of the distance between the two first pipe sections 11.

[0083] In addition, it is worth noting that the components in the present application are first immersed in plastic before assembly, and the complete coating is formed after assembly, so as to avoid the existence of uncovered areas after assembly. The spherical cavity 211 and the communication hole 221 are ensured to have uniform coating by rotary immersion or electrostatic spraying process, so as to avoid sagging or uneven thickness. The narrow space such as the receiving hole 512 and the receiving groove 513 in the reverse prevention mechanism 5 needs to be filled with special tooling to ensure that the immersion liquid is fully filled, and the thickness is usually 0.3-0.8mm, which effectively ensures the overall corrosion prevention effect. The specific immersion and spraying principle and process adopt the prior art, and the present application will not be described in detail.

[0084] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application.

Claims

1. A composite plastic-impregnated corrosion-resistant pipeline for nuclear power, characterized in that: it comprises a receiving pipe (1) and a second pipe section (3); both ends of the receiving pipe (1) are provided with knuckles (2), and both of the knuckles (2) are connected with the second pipe section (3) on the side away from each other; the knuckle (2) comprises an end sleeve (21) and a spherical core body (22); the end sleeve (21) is arranged at the end of the receiving pipe (1), and has a spherical cavity (211) inside; the spherical core body (22) is movably embedded in the spherical cavity (211) and partially exposed to the outside from the end face of the end sleeve (21); the spherical core body (22) is provided with a through communication hole (221) inside; the second pipe section (3) is fixed on the outer wall of the spherical core body (22) and communicates with the communication hole (221); the end sleeve (21) is provided with an adjusting mechanism (23) for driving the spherical core body (22) to rotate and adjust; both of the second pipe sections (3) are provided with non-return mechanisms (5); both of the non-return mechanisms (5) are arranged in the same direction, and each comprises an inner core body (51), a floating core (52) and a blocking plate (53); the inner core body (51) is fixedly matched in the second pipe section (3), and is provided with a hole (511) extending through along the length direction of the second pipe section (3) inside; the inner core body (51) is provided with a receiving hole (512) above the hole (511) inside, and is provided with a receiving groove (513) downstream of the receiving hole (512) inside; the receiving hole (512) and the receiving groove (513) are communicated with each other and provided with a communication groove (514); the floating core (52) is used for blocking the hole (511) and is limitingly and slidingly installed at the top of the receiving hole (512); the blocking plate (53) is used for blocking the hole (511) downstream of the floating core (52) and is limitingly and slidingly installed at the top of the receiving groove (513); the communication groove (514) is provided with a connecting rod (54), one end of the connecting rod (54) is fixed with the floating core (52), and the other end is fixed with the blocking plate (53).

2. The composite plastic-impregnated corrosion-resistant pipeline for nuclear power according to claim 1, characterized in that: the adjusting mechanism (23) comprises a worm gear (232) and a worm (234); the outer wall of the spherical core body (22) is fixed with a shaft (231), the shaft (231) penetrates through the end sleeve (21) to the outside along the radial direction, and is rotatably connected with the end sleeve (21); the worm gear (232) is fixed on the outer end of the shaft (231); the outer wall of the end sleeve (21) is fixed with a bracket (233), and the worm (234) is rotatably installed on the bracket (233) and is engaged with the worm gear (232).

3. The composite plastic-impregnated corrosion-resistant pipeline for nuclear power according to claim 2, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The inner diameter of the communication hole (221) is smaller as it is closer to the second pipe section (3).

4. The composite immersion plastic anticorrosion pipe for nuclear power according to claim 1, characterized in that: The receiving pipe (1) comprises a pipe inserting section (13) and a pair of first pipe sections (11); The first pipe section (11) on one side is fixed with a first fixing ring (12), and the first pipe section (11) on the other side is fixed with a second fixing ring (15); The pipe inserting section (13) is fixed at one end of the first fixing ring (12) and is matched and slidingly inserted at the other end into the first pipe section (11) on the other side; The second fixing ring (15) is provided with a threaded hole (151), and the first fixing ring (12) is rotatably provided with an adjusting screw (14) which is penetratingly and threadedly matched and installed in the threaded hole (151); The two end sleeve pipes (21) are respectively installed on the ends of the two first pipe sections (11) away from each other.

5. The composite immersion plastic anticorrosion pipe for nuclear power according to claim 1, characterized in that: The receiving hole (512) and the hole (511) are of the same diameter and correspondingly arranged, and the width of the receiving groove (513) is consistent with the inner diameter of the hole (511); The floating core (52) is composed of a hemispherical body (521) and a cylindrical body (522) fixed at the top of the hemispherical body (521); The hemispherical body (521) is matched with the hole (511), and the cylindrical body (522) is matched with the receiving hole (512); The blocking plate (53) is composed of a semicircular body (531) and a rectangular body (532) fixed at the top of the semicircular body (531), the semicircular body (531) is matched with the hole (511), and the rectangular body (532) is matched with the receiving groove (513).

6. The composite immersion plastic anticorrosion pipe for nuclear power according to claim 4, characterized in that: The end sleeve pipe (21) is correspondingly rotatably installed at the end of the first pipe section (11); The outer wall of the first pipe section (11) is provided with an outer threaded portion (401), and the outer threaded portion (401) is matched and sleeved with an inner threaded ring sleeve (4); The inner threaded ring sleeve (4) is provided with a second sliding hole (41) extending along the length direction of the first pipe section (11), and the second sliding hole (41) is slidingly inserted with a second guide rod (42); The second guide rod (42) is fixedly connected with the end sleeve pipe (21) on the corresponding side; By rotating the inner threaded ring sleeve (4), the end sleeve pipe (21) can be rotated and adjusted around the axis of the first pipe section (11).

7. The composite immersion plastic anticorrosion pipe for nuclear power according to claim 2, characterized in that: A transmission rod (6) is further provided; The transmission rod (6) comprises a square sliding rod (62) and a square clamping rod (61). Two square holes (611) are arranged in the square clamping rods (61), and the square sliding rods (62) are slidingly inserted into the square holes (611) of the square clamping rods (61) at two ends respectively; Two springs (63) are arranged in the square holes (611), one end of the spring (63) is fixed to the end of the square sliding rod (62) in the square hole (611), and the other end is fixed to the end wall in the square hole (611); Two worm gears (234) are fixed with a handle (235) at one end close to each other, and a square clamping hole (236) is arranged on the end face of the handle (235) for matching and clamping the square clamping rod (61).

8. The composite immersion plastic anticorrosion pipeline for nuclear power according to claim 4, characterized in that: The first fixed ring (15) is uniformly provided with a first sliding hole (152), and the first fixed ring (12) is uniformly provided with a first guide rod (16); Each first guide rod (16) is slidingly inserted into the first sliding hole (152) one by one.

9. A composite impregnated anticorrosion pipe impregnated coating for use in a composite impregnated anticorrosion pipe according to claim 6, characterized in that: The immersion coating is polytetrafluoroethylene coating, and the polytetrafluoroethylene coating is composed of the following raw materials in mass fraction: polytetrafluoroethylene concentrated dispersion liquid 150 parts, phthalate coupling agent 0.003 parts, defoaming agent 0.008 parts, leveling agent 0.006 parts, alcohol ester twelve 0.015 parts, 8 parts, chromium sesquioxide and tin bronze mixture 18 parts, inorganic pigment 5 parts, inorganic modifier 0.003 parts, preservative and anti-settling agent 0.003 parts.

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