Corrosion-resistant fluorine-lined pipeline structure for chemical industry and using method thereof

Abstract

The invention discloses a corrosion-resistant fluorine-lined pipeline structure for chemical engineering and a using method of the corrosion-resistant fluorine-lined pipeline structure, and particularly relates to the technical field of corrosion-resistant fluorine-lined pipes. The corrosion-resistant fluorine-lined pipeline structure comprises a fluorine-lined pipeline and an anti-leakage locking mechanism, and connecting pipelines are installed on the two sides of the fluorine-lined pipeline through bolts; an anti-leakage locking mechanism is installed at the flange connecting position of the fluorine lining pipeline and the connecting pipeline, the anti-leakage locking mechanism comprises a grading assembly, a locking control channel, locking assemblies and a triggering assembly, the locking control channel is reserved above the grading assembly, the locking assemblies are arranged on the two sides of the locking control channel, and the triggering assembly is arranged above the grading assembly. The system has the core advantages that passive protection is converted into active safety, and the problem of pipeline leakage caused by extreme conditions is solved through mechanical-electrical-hydraulic integrated intelligent control.

Description

Technical Field

[0001] This application relates to the technical field of corrosion-resistant fluorine-lined pipes. More specifically, this application relates to a corrosion-resistant fluorine-lined pipe structure for chemical industry and its usage method. Background Art

[0002] A corrosion-resistant fluorine-lined pipe is a composite pipe system formed by lining a fluoroplastic, such as polytetrafluoroethylene (PTFE), perfluoroethylene propylene (FEP), polyvinylidene fluoride (PVDF), etc., on the inner wall of a metal or non-metal pipe, and is designed specifically for transporting highly corrosive media. Its core advantage lies in combining the mechanical strength of the metal pipe with the chemical inertness of the fluoroplastic, ensuring both structural reliability and resistance to almost all chemical corrosion. However, in the flange connections of some pipes with long maintenance intervals, leakage often occurs due to sealing problems;

[0003] After retrieval, the existing application number: CN116538355A, discloses a vacuum-resistant, high-temperature-resistant, and corrosion-resistant fluorine-lined pipe, which relates to the technical field of fluorine-lined pipes, including a metal outer pipe and a fluorine-lined layer lined inside the metal outer pipe. The inner surface of the metal outer pipe is provided with a plurality of radially extending necking grooves along the circumferential direction, and the outer surface of the fluorine-lined layer is provided with clamping protrusions respectively cooperating with the necking grooves, and each clamping protrusion is respectively clamped in each necking groove. The provided vacuum-resistant, high-temperature-resistant, and corrosion-resistant fluorine-lined pipe can improve the connection strength between the fluorine-lined layer and the metal outer pipe, ensure that the fluorine-lined layer does not fall off, and improve the vacuum resistance of the pipe. The inventor found the following problems in the prior art during the implementation of this application:

[0004] During the construction of existing fluorine-lined pipes, when laying in the chemical plant area, due to design requirements, part of the pipes are in positions where they cannot be quickly repaired or are difficult to repair. The pipes connected by flanges in this area will have leakage problems due to untimely maintenance. Moreover, the maximum heat resistance of existing fluoroplastics is 260°C, and their performance drops sharply when the temperature exceeds 300°C, directly reducing the service life of the pipes, and thus directly affecting the service life of the pipes;

[0005] Therefore, in view of the above problems, a corrosion-resistant fluorine-lined pipe structure for chemical industry and its usage method are proposed. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, this application provides a corrosion-resistant fluorine-lined pipe structure for chemical industry and its usage method to solve the problems raised in the above background art.

[0007] To achieve the above object, the present application provides the following technical solution: A corrosion-resistant fluorine-lined pipeline structure for chemical industry, including a fluorine-lined pipeline and a leakage-proof locking mechanism. Connecting pipelines are installed on both sides of the fluorine-lined pipeline through bolts, and a leakage-proof locking mechanism is installed at the flange connection of the fluorine-lined pipeline and the connecting pipeline. The leakage-proof locking mechanism includes a grading component, a locking control channel, a locking component, and a triggering component. A locking control channel is reserved above the grading component, locking components are arranged on both sides of the locking control channel, and a triggering component is placed above the locking control channel;

[0008] An inner pipeline is arranged on the inner wall of the fluorine-lined pipeline, and a circulating cooling cavity is reserved between the fluorine-lined pipeline and the inner pipeline. Threaded water blocking grids are arranged on the outer surface of the inner pipeline. A water inlet pipe is installed on the outer surface of the fluorine-lined pipeline. The top end of the water inlet pipe is fixedly connected to a control valve through a bolt. The water inlet end of the control valve is connected to a water pipe. A temperature sensor is installed on the side of the water inlet pipe, and the temperature sensing probe of the temperature sensor is in contact with the threaded water blocking grid of the inner pipeline. An outlet pipe is arranged on the side of the fluorine-lined pipeline away from the water inlet pipe.

[0009] Preferably, a pressure-resistant grid is welded on the inner wall surface of the inner pipeline, and a pressure-resistant inner lining sleeve is placed on the inner wall surface of the pressure-resistant grid. The pressure-resistant inner lining sleeve includes an outer edge ring, mounting holes, and a connecting sleeve. Mounting holes are arranged at the edge of the outer edge ring, and the flange mounting holes of the fluorine-lined pipeline and the mounting holes are mutually fitted.

[0010] Preferably, the leakage-proof locking mechanism further includes a locking ring main body, an assembly limiting ring, a leakage position warning box, and fixing bolts. Assembly limiting rings are placed at both ends of the locking ring main body. Fixing bolts are arranged on the side of the assembly limiting ring away from the locking ring main body. The locking ring main body and the assembly limiting ring form a detachable structure through the fixing bolts. Four leakage position warning boxes are arranged on the outer diameter surface of the locking ring main body, and the four leakage position warning boxes divide the leakage area of the locking ring main body into four areas.

[0011] Preferably, the locking ring main body includes a liquid storage cavity, a liquid seepage chamber, and nano microcapsules. Four liquid storage cavities are placed inside the liquid seepage chamber. Nano microcapsules are placed between the four liquid storage cavities, and nano silica particles are filled in the nano microcapsules.

[0012] Preferably, the grading component includes a first outer shell, a liquid inlet chamber, a pushing ring, a sealing head, a sealing port, a connecting rod, and a pushing block. An inner part of the first outer shell is reserved with the liquid inlet chamber. The pushing ring is arranged above the liquid inlet chamber. Two sealing heads are installed above the pushing ring. The connecting rod is installed between the two sealing heads. The sealing port is arranged above the sealing head. One end of the connecting rod away from the pushing ring is installed with the pushing block.

[0013] Preferably, the grading component further includes a sealing plug head and a liquid inlet. The liquid inlets are arranged on both sides of the first outer shell. The sealing plug head is installed inside the liquid inlet.

[0014] Preferably, the locking component includes a fixed bracket, a second outer shell, a first spring, and a plugging arc rod. The second outer shell is installed on the side of the fixed bracket. The first spring is placed inside the second outer shell. The plugging arc rod is arranged on a side of the first spring away from the fixed bracket.

[0015] Preferably, the triggering component includes a third outer shell, a triggering head, a clamping component, a second spring, and a locking rod. The triggering head is placed inside the third outer shell. The clamping components are installed on both sides of the triggering head. The second spring is placed below the clamping component. The locking rod is placed below the second spring.

[0016] Preferably, a processing method for a corrosion-resistant fluorine-lined pipeline structure for chemical industry, the processing method includes the following steps:

[0017] Step 1: Weld a pressure-resistant grid inside the fluorine-lined pipeline. After the welding is completed, insert a split pressure-resistant inner lining sleeve into the fluorine-lined pipeline, and perform hot melting connection on the joint of the split pressure-resistant inner lining sleeve. Before hot melting, insert a screw into the flange mounting hole of the fluorine-lined pipeline and the mounting hole of the pressure-resistant inner lining sleeve. After positioning the pressure-resistant inner lining sleeve, perform hot melting connection on the pressure-resistant inner lining sleeve to complete the connection of the pressure-resistant inner lining sleeve. The installation structure of the pressure-resistant inner lining sleeve installed in the connecting pipeline is the same as that of the fluorine-lined pipeline.

[0018] Step 2: After the processing of the fluorine-lined pipe and the connecting pipe is completed, connect the fluorine-lined pipe and the connecting pipe, and install an anti-leakage locking mechanism at the connection between the fluorine-lined pipe and the connecting pipe. First, separate the anti-leakage locking mechanism, and pass the locking ring body and the assembly limit ring through the corresponding flanges of the fluorine-lined pipe and the connecting pipe respectively, and place them on the outer diameter surface of the pipe. Then use a crane to connect the flanges of the fluorine-lined pipe and the connecting pipe, place a rubber sealing ring at the flange connection of the fluorine-lined pipe and the connecting pipe, and use bolts to fix the fluorine-lined pipe and the connecting pipe to complete the connection of the fluorine-lined pipe and the connecting pipe. Then, sleeved the locking ring body on the flange connection of the fluorine-lined pipe and the connecting pipe, and use the fixing bolts to install the assembly limit rings on both sides of the locking ring body to complete the fixing of the anti-leakage locking mechanism;

[0019] Step 3: Then, when the chemical liquid is flowing, when the seal between the flange rings leaks, at this time, the liquid leaks from the flange where the fluorine-lined pipe and the connecting pipe are connected. Then, the leaked liquid will come into contact with the nano microcapsules in the liquid seepage chamber. Through the contact between the liquid and the nano microcapsules, the wrapping epidermis of the nano microcapsules is damaged, and the internally wrapped nano silica sealant is released, so that the nano silica sealant contacts the chemical liquid and continues to expand to completely fill the liquid seepage chamber;

[0020] Step 4: Then, when the liquid in the flange notch is continuously pressurized and applied to the liquid storage chamber, when the pressure reaches 0.8 MPa, the liquid breaks through the liquid inlet reserved port set in the liquid storage cavity, and then the liquid surges in and enters the liquid inlet reserved for the grading component. When the liquid enters the inside of the liquid inlet chamber and directly presses the push ring, the push ring is pressed to move upward. Because of the pressure limiting sliders set on both sides of the first outer shell, when the pressure reaches 1.0 MPa, the push ring moves upward and pushes open the set pressure limiting sliders. When the pressure reaches 1.2 MPa, the push ring drives the push block on the connecting rod, so that the push block is at the center of the insertion channel of the locking control channel, and the locking component is triggered. The insertion arc rod of the locking component is pushed by the first spring into the insertion channel of the locking control channel and is restricted by the push block. When the pressure reaches 1.4 MPa, at this time, the push ring breaks through the second pressure limiting slider, so that the sealing head of the push ring is locked with the sealing port of the first outer shell, and the push block in the insertion channel of the locking control channel continues to move upward. At this time, the insertion arc rod of the locking component completely passes through the locking control channel to completely lock the locking ring body on the flange. Then, according to the inserted length on the connecting rod, the triggering component will directly trigger the danger warning of the leakage position warning box and give a warning, and the grading trigger head will trigger different levels of alarms according to different liquid pressures;

[0021] Step Five: When the liquid is transported along the inner pipeline, the temperature sensing probe connected to the temperature sensor detects that during the transportation of the liquid in the inner pipeline, when the temperature of the transported liquid is within 1°C to 260°C, the water circulation cooling stops running and remains normal. At this time, when the temperature sensing probe connected to the temperature sensor detects that the temperature of the transported liquid in the inner pipeline is above 260°C, the control valve opens. At this time, the water supply pipe transports the cooling water source into the interior of the circulation cooling chamber, and the water source moves along the circulation cooling chamber and reaches the end of the movement along the threaded walkway, and flows out through the water outlet pipe, so as to control the temperature of the inner pipeline during the liquid transportation process, so that the contact temperature between the inner pipeline and the liquid is always within the safe range.

[0022] Technical effects and advantages of the present application:

[0023] 1. Compared with the prior art, in the corrosion-resistant fluorine-lined pipeline structure for chemical industry and its usage method thereof, the locking component of the anti-leakage locking mechanism triggers mechanical locking by using the self-pressure of the leaked liquid, without external energy. The double sealing of mechanical locking and nano microcapsules ensures zero leakage in an emergency. The core advantage of this system is to transform passive protection into active safety, and through mechatronic intelligent control, to reduce pipeline leakage problems caused by extreme situations.

[0024] 2. Currently, the highest heat resistance of fluoroplastics is about 260°C, and its performance drops sharply when the temperature exceeds 300°C. Therefore, during the transportation of the pipeline, when the temperature exceeds 260°C, the service life of the pipeline will be reduced. However, the pipeline structure is provided with a water circulation structure. The temperature sensor detects the temperature transported in the inner pipeline. When the detected temperature exceeds 260°C, the control valve opens, driving the water source into the circulation cooling chamber and flowing along the threaded water baffle of the inner pipeline, so as to adsorb the temperature received by the pipeline through the cooling of the liquid, thereby completing the protection of the inner pipeline and reducing the influence of high temperature during the liquid transportation process on the inner pipeline.

[0025] 3. Compared with the prior art, in the corrosion-resistant fluorine-lined pipeline structure for chemical industry and its usage method thereof, even if the chemical liquid in the pipeline leaks out through the gap at the flange connection, the liquid will contact the nano microcapsules filled in the liquid leakage chamber. The nano microcapsules expand to block the liquid leakage chamber and squeeze the space in the liquid leakage chamber to block the liquid leakage point. When the liquid leakage continuously seeps out due to the increasing compressed air, the liquid is transported through the liquid storage chamber to control the triggering of the grading component, the locking component and the triggering component, so that the locking component of the anti-leakage locking mechanism locks tightly and triggers an alarm for reminder. At this time, the anti-leakage locking mechanism is fixed on the flange of the pipeline. Through the restriction of the locking component, the pipeline is prevented from breaking at the flange, thus buying time for maintenance. Brief Description of the Drawings

[0026] Figure 1 is the overall structural schematic diagram of the present application;

[0027] Figure 2 is the structural schematic diagram of the fluorine-lined pipe of the present application;

[0028] Figure 3 is the structural schematic diagram of the pressure-resistant inner lining sleeve of the present application;

[0029] Figure 4 is the structural schematic diagram of the anti-leakage locking mechanism of the present application;

[0030] Figure 5 is the front view sectional structural schematic diagram of the locking ring main body of the present application;

[0031] Figure 6 is of the present application Figure 5 structural schematic diagram at position A;

[0032] Figure 7 is the front view sectional structural schematic diagram of the grading component of the present application;

[0033] Figure 8 is the structural schematic diagram of the inner pipe of the present application;

[0034] Figure 9 is the front view sectional structural schematic diagram of the threaded water flow baffle of the present application.

[0035] Reference numerals are: 1, fluorine-lined pipe; 101, inner pipe; 102, threaded water flow baffle; 2, connecting pipe; 3, anti-leakage locking mechanism; 301, fixing bolt; 4, pressure-resistant inner lining sleeve; 401, outer edge ring; 402, mounting hole; 403, connecting sleeve; 5, pressure-resistant grid; 6, locking ring main body; 7, assembly limit ring; 8, leakage position warning box; 9, liquid storage cavity; 10, grading component; 1001, first outer shell; 1002, liquid inlet chamber; 1003, pushing ring; 1004, sealing head; 1005, sealing port; 1006, connecting rod; 1007, pushing block; 1008, sealing plugging head; 1009, liquid inlet; 11, liquid seepage chamber; 12, nano microcapsule; 13, locking control channel; 14, locking component; 1401, fixing bracket; 1402, second outer shell; 1403, first spring; 1404, plugging arc rod; 15, triggering component; 1501, third outer shell; 1502, triggering head; 1503, engaging part; 1504, second spring; 1505, locking rod; 16, circulating cooling cavity; 17, water inlet pipe; 18, water outlet pipe; 19, control valve; 20, water pipe; 21, temperature sensor. Detailed Description of the Invention

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0037] Embodiment 1

[0038] As shown in the attached Figures 1 to 9 A corrosion-resistant fluorine-lined pipeline structure for the chemical industry, including a fluorine-lined pipeline 1 and a leakage-proof locking mechanism 3. Both sides of the fluorine-lined pipeline 1 are installed with connecting pipelines 2 through bolts. A leakage-proof locking mechanism 3 is installed at the flange connection of the fluorine-lined pipeline 1 and the connecting pipeline 2. The leakage-proof locking mechanism 3 includes a grading component 10, a locking control channel 13, a locking component 14, and a triggering component 15. A locking control channel 13 is reserved above the grading component 10. Locking components 14 are arranged on both sides of the locking control channel 13. A triggering component 15 is placed above the locking control channel 13;

[0039] The inner wall of the fluorine-lined pipeline 1 is provided with an inner pipeline 101. A circulating cooling cavity 16 is reserved between the fluorine-lined pipeline 1 and the inner pipeline 101. Threaded water diversion grids 102 are arranged on the outer surface of the inner pipeline 101. A water inlet pipe 17 is installed on the outer surface of the fluorine-lined pipeline 1. The top of the water inlet pipe 17 is fixedly connected to a control valve 19 through bolts. The water inlet end of the control valve 19 is connected to a water pipe 20. A temperature sensor 21 is installed on the side of the water inlet pipe 17. The temperature sensing probe of the temperature sensor 21 is in contact with the threaded water diversion grid 102 of the inner pipeline 101. An outlet pipe 18 is arranged on the side of the fluorine-lined pipeline 1 away from the water inlet pipe 17.

[0040] Among them, during the use process, although the laying of pipelines needs to meet the conditions of convenience and optimization, in the laying of some pipelines, due to design requirements, some pipelines are located in places where it is difficult to inspect and repair. Therefore, sensors are used to detect the leakage of pipelines. However, since the sensors themselves involve electronic components, when they come into contact with chemical components in the pipelines for a long time, the detection may be distorted. Therefore, by installing a leak-proof locking mechanism 3 at the flange connection between the fluorine-lined pipeline 1 and the connecting pipeline 2, the time required for maintenance can be extended. And even in the event of special situations such as small earthquakes, the flange connections between the pipelines are still protected by the leak-proof locking mechanism 3, and the flange structure between the pipelines is strongly locked and connected to protect the connection between the pipelines. Even when leakage occurs at the pipeline flange connection, the leak-proof locking mechanism 3 passes through the internal grading component 10, locking component 14, triggering component 15, as well as the liquid storage cavity 9, liquid seepage chamber 11, and nano microcapsules 12. Even if the chemical liquid in the pipeline leaks out through the gap at the flange connection, the liquid will come into contact with the nano microcapsules 12 filled in the liquid seepage chamber 11. The nano microcapsules 12 will expand to block the liquid seepage chamber 11 and squeeze the space in the liquid seepage chamber 11 to block the seepage point. When the seepage situation continuously seeps out due to the increasing air pressure, the liquid is transported through the liquid storage cavity 9 to control the triggering of the grading component 10, locking component 14, and triggering component 15, so that the locking component 14 of the leak-proof locking mechanism 3 is locked and an alarm is triggered for reminder. At this time, the leak-proof locking mechanism 3 is fixed on the flange of the pipeline. Through the restriction of the locking component 14, the pipeline is prevented from breaking at the flange, thus buying time for maintenance. And during the normal transportation process, since the existing fluoroplastics have a maximum heat resistance of 260 °C and their performance drops sharply when the temperature exceeds 300 °C; the creep resistance of fluoroplastics is insufficient and it is difficult to meet the long-term safe operation. Therefore, a water circulation channel is established to cool down through the water source to adsorb the temperature above 260 °C of the pipeline, so as to reduce the temperature contacted by the inner pipeline 101 and protect the normal use of the inner pipeline, reducing the influence of temperature on the inner pipeline during transportation.

[0041] Embodiment 2

[0042] Based on Embodiment 1, the solution in Embodiment 1 is further refined and introduced in combination with the following specific working methods, as Figures 1 to 9 shown, for details, see the following description:

[0043] As a preferred embodiment, a pressure-resistant grid 5 is welded to the inner wall surface of the inner pipeline 101, and a pressure-resistant inner lining sleeve 4 is placed on the inner wall surface of the pressure-resistant grid 5. The pressure-resistant inner lining sleeve 4 includes an outer edge ring 401, mounting holes 402, and a connecting sleeve 403. Mounting holes 402 are provided at the edge of the outer edge ring 401, and the flange mounting holes 402 of the fluorine-lined pipeline 1 and the mounting holes 402 of the pressure-resistant inner lining sleeve 4 are fitted to each other. The pressure-resistant inner lining sleeve 4 is made of PTFE polytetrafluoroethylene. Through the PTFE polytetrafluoroethylene of the pressure-resistant inner lining sleeve 4 and in cooperation with the pressure-resistant grid 5 inside the fluorine-lined pipeline 1, the pipeline has high temperature resistance and negative pressure resistance, so that when transporting some chemical liquids, it can have more advantages and reduce the problem of liquid corrosion.

[0044] As a preferred embodiment, the leak-proof locking mechanism 3 further includes a locking ring body 6, an assembly limiting ring 7, a leakage position warning box 8, and fixing bolts 301. Assembly limiting rings 7 are placed at both ends of the locking ring body 6, and fixing bolts 301 are provided on the side of the assembly limiting ring 7 away from the locking ring body 6. The locking ring body 6 and the assembly limiting ring 7 form a detachable structure through the fixing bolts 301. Four leakage position warning boxes 8 are provided on the outer diameter surface of the locking ring body 6, and the four leakage position warning boxes 8 divide the leakage area of the locking ring body 6 into four areas.

[0045] As a preferred embodiment, the locking ring body 6 includes a liquid storage chamber 9, a liquid seepage chamber 11, and nano microcapsules 12. Four liquid storage chambers 9 are placed inside the liquid seepage chamber 11, and nano microcapsules 12 are placed between the four liquid storage chambers 9. Nano silica particles are filled in the nano microcapsules 12, and the four liquid storage chambers 9 divide the liquid seepage area into four areas. Through the first-triggered alarm, the liquid seepage position is roughly located to facilitate avoiding the liquid seepage area during subsequent maintenance. During the removal process, the problem of liquid spraying caused by pressure and other issues is reduced, and personal injury to maintenance personnel is avoided.

[0046] As a preferred embodiment, the grading component 10 includes a first outer shell 1001, a liquid inlet chamber 1002, a pushing ring 1003, a sealing head 1004, a sealing port 1005, a connecting rod 1006, and a pushing block 1007. A liquid inlet chamber 1002 is reserved inside the first outer shell 1001, a pushing ring 1003 is provided above the liquid inlet chamber 1002, two sealing heads 1004 are installed above the pushing ring 1003, a connecting rod 1006 is installed between the two sealing heads 1004, a sealing port 1005 is provided above the sealing head 1004, and a pushing block 1007 is installed at one end of the connecting rod 1006 away from the pushing ring 1003.

[0047] As a preferred embodiment, the grading component 10 further includes a sealing plug 1008 and a liquid inlet 1009. Liquid inlets 1009 are provided on both sides of the first outer shell 1001, and a sealing plug 1008 is installed inside each liquid inlet 1009.

[0048] As a preferred embodiment, the locking component 14 includes a fixed bracket 1401, a second outer shell 1402, a first spring 1403, and a plugging arc rod 1404. The second outer shell 1402 is installed on the side of the fixed bracket 1401. The first spring 1403 is placed inside the second outer shell 1402. The plugging arc rod 1404 is provided on the side of the first spring 1403 away from the fixed bracket 1401.

[0049] As a preferred embodiment, the triggering component 15 includes a third outer shell 1501, a triggering head 1502, a clamping component 1503, a second spring 1504, and a locking rod 1505. The triggering head 1502 is placed inside the third outer shell 1501. Clamping components 1503 are installed on both sides of the triggering head 1502. The second spring 1504 is placed below the clamping component 1503. The locking rod 1505 is placed below the second spring 1504.

[0050] As a preferred embodiment, a processing method for a corrosion-resistant fluorine-lined pipeline structure for chemical industry includes the following steps:

[0051] Step 1: A pressure-resistant grid 5 is welded inside the fluorine-lined pipeline 1. After the welding is completed, the separable pressure-resistant inner lining sleeve 4 is inserted into the fluorine-lined pipeline 1, and the joint of the separable pressure-resistant inner lining sleeve 4 is heat-melted. Before heat-melting, a screw is inserted into the flange mounting hole 402 of the fluorine-lined pipeline 1 and the mounting hole 402 of the pressure-resistant inner lining sleeve 4. After the positioning of the pressure-resistant inner lining sleeve 4 is completed, the pressure-resistant inner lining sleeve 4 is heat-melted to complete the connection of the pressure-resistant inner lining sleeve 4. The installation structure of the connection pipeline 2 with the pressure-resistant inner lining sleeve 4 is the same as that of the fluorine-lined pipeline 1.

[0052] Step 2: After the processing of the fluorine-lined pipe 1 and the connecting pipe 2 is completed, connect the fluorine-lined pipe 1 and the connecting pipe 2, and install a leak-proof locking mechanism 3 at the connection between the fluorine-lined pipe 1 and the connecting pipe 2. First, separate the leak-proof locking mechanism 3, and pass the locking ring body 6 and the assembled limiting ring 7 through the corresponding flanges of the fluorine-lined pipe 1 and the connecting pipe 2 respectively, and place them on the outer surface of the pipe diameter. Then use a crane to connect the flanges of the fluorine-lined pipe 1 and the connecting pipe 2, place a rubber sealing ring at the flange connection of the fluorine-lined pipe 1 and the connecting pipe 2, and use bolts to fix the fluorine-lined pipe 1 and the connecting pipe 2 to complete the connection of the fluorine-lined pipe 1 and the connecting pipe 2. Then, sleeved the locking ring body 6 on the flange connection of the fluorine-lined pipe 1 and the connecting pipe 2, and use the fixing bolts 301 to install the assembled limiting rings 7 on both sides of the locking ring body 6 to complete the fixation of the leak-proof locking mechanism 3;

[0053] Step 3: Then, when the chemical liquid is flowing, when the seal between the flange rings leaks, at this time, the liquid leaks from the flange where the fluorine-lined pipe 1 and the connecting pipe 2 are connected. Then, the leaked liquid will come into contact with the nano microcapsules 12 in the liquid leakage chamber 11. Through the contact between the liquid and the nano microcapsules 12, the wrapping epidermis of the nano microcapsules 12 is damaged, and the internally wrapped nano silica sealant is released, so that the nano silica sealant comes into contact with the chemical liquid and continuously expands to completely fill the liquid leakage chamber 11;

[0054] Step 4: Then, when the liquid in the flange notch is continuously pressurized and applied to the liquid storage chamber, when the pressure reaches 0.8 MPa, the liquid breaks through the liquid inlet reserved port provided by the liquid storage chamber 9, and then the liquid surges in, and the liquid enters the liquid inlet 1009 reserved by the grading component 10. When the liquid enters the interior of the liquid inlet chamber 1002 and directly presses the pushing ring 1003, the pushing ring 1003 is pressed to move upward. Because of the pressure limiting sliders provided on both sides of the first housing 1001, when the pressure reaches 1.0 MPa, the pushing ring 1003 moves upward and pushes open the set pressure limiting sliders. When the pressure reaches 1.2 MPa, the pushing ring 1003 drives the pushing block 1007 on the connecting rod 1006, so that the pushing block 1007 is at the center of the insertion channel of the locking control channel 13, and the locking component 14 is triggered, and the insertion arc rod 1404 of the locking component 14 is pushed by the first spring 1403 into the insertion channel of the locking control channel 13 and is restricted by the pushing block 1007. When the pressure reaches 1.4 MPa, at this time, the pushing ring 1003 breaks through the second pressure limiting slider, so that the sealing head 1004 of the pushing ring 1003 is locked with the sealing port 1005 of the first housing 1001, and the pushing block 1007 in the insertion channel of the locking control channel 13 continues to move upward. At this time, the insertion arc rod 1404 of the locking component 14 completely passes through the locking control channel 13, and the locking ring body 6 is completely locked on the flange. Then, according to the inserted length on the connecting rod 1006, the trigger component 15 will directly trigger the danger warning of the leakage position warning box 8 and give a warning, and the grading trigger head 1502 triggers different levels according to different liquid pressures;

[0055] Step 5: When the liquid is transported along the inner pipe 101, the temperature sensing probe connected to the temperature sensor 21 detects that during the transportation of the liquid in the inner pipe 101, when the temperature of the transported liquid is within 1°C to 260°C, the water circulation cooling stops running and remains normal. At this time, the temperature sensing probe connected to the temperature sensor 21 detects that when the temperature of the transported liquid in the inner pipe 101 is above 260°C, the control valve 19 opens at this time, and the water supply pipe 20 transports the cooling water source into the interior of the circulation cooling chamber 16, and the water source moves along the circulation cooling chamber 16 and reaches the end of the threaded walkway and flows out through the water outlet pipe 18, so as to cool the temperature of the inner pipe 101 during the liquid transportation process, so that the contact temperature between the inner pipe 101 and the liquid is always within the safe range.

[0056] The working process of this application is as follows: First, a pressure-resistant grid 5 is welded inside the fluorine-lined pipe 1. After the welding is completed, the separable pressure-resistant inner lining sleeve 4 is inserted into the fluorine-lined pipe 1, and the fitting part of the separable pressure-resistant inner lining sleeve 4 is connected by hot melting. Before hot melting, a screw is inserted into the flange mounting hole 402 of the fluorine-lined pipe 1 and the mounting hole 402 of the pressure-resistant inner lining sleeve 4. After positioning the pressure-resistant inner lining sleeve 4, the pressure-resistant inner lining sleeve 4 is connected by hot melting to complete the connection of the pressure-resistant inner lining sleeve 4. The installation structure of the pressure-resistant inner lining sleeve 4 installed on the connecting pipe 2 is the same as that of the fluorine-lined pipe 1;

[0057] After the processing of the fluorine-lined pipe 1 and the connecting pipe 2 is completed, the fluorine-lined pipe 1 and the connecting pipe 2 are connected, and a leak-proof locking mechanism 3 is installed at the connection between the fluorine-lined pipe 1 and the connecting pipe 2. First, the leak-proof locking mechanism 3 is separated, and the locking ring body 6 and the assembled limit ring 7 are respectively passed through the corresponding flanges of the fluorine-lined pipe 1 and the connecting pipe 2 and placed on the outer surface of the pipe diameter. Then, a crane is used to connect the flanges of the fluorine-lined pipe 1 and the connecting pipe 2, and a rubber sealing ring is placed at the flange connection of the fluorine-lined pipe 1 and the connecting pipe 2, and bolts are used to fix the fluorine-lined pipe 1 and the connecting pipe 2 to complete the connection of the fluorine-lined pipe 1 and the connecting pipe 2. Then, the locking ring body 6 is sleeved on the flange connection of the fluorine-lined pipe 1 and the connecting pipe 2, and the assembled limit rings 7 on both sides of the locking ring body 6 are installed using the fixing bolts 301 to complete the fixing of the leak-proof locking mechanism 3;

[0058] Then, when the chemical liquid flows, when the seal between the flange rings leaks, at this time, the liquid leaks from the flange where the fluorine-lined pipe 1 and the connecting pipe 2 are connected. Then, the leaked liquid comes into contact with the nano microcapsules 12 in the liquid leakage chamber 11. Through the contact between the liquid and the nano microcapsules 12, the wrapping epidermis of the nano microcapsules 12 is damaged, and the internally wrapped nano silica sealant is released, so that the nano silica sealant comes into contact with the chemical liquid and continuously expands to completely fill the liquid leakage chamber 11;

[0059] Then, when the liquid in the flange notch is continuously pressurized and applied to the liquid storage chamber, when the pressure reaches 0.8 MPa, the liquid breaks through the liquid inlet reserved port set in the liquid storage chamber 9, and then the liquid surges in, causing the liquid to enter the liquid inlet 1009 reserved in the grading component 10. When the liquid enters the interior of the liquid inlet chamber 1002 and directly presses the push ring 1003, the push ring 1003 is pressed to move upward. Due to the pressure limiting sliders set on both sides of the first housing 1001, when the pressure reaches 1.0 MPa, the push ring 1003 moves upward and pushes open the set pressure limiting sliders. When the pressure reaches 1.2 MPa, the push ring 1003 drives the push block 1007 on the connecting rod 1006, causing the push block 1007 to be at the center of the insertion channel of the locking control channel 13, and the locking component 14 is triggered. The insertion arc rod 1404 of the locking component 14 is pushed by the first spring 1403 into the insertion channel of the locking control channel 13 and is restricted by the push block 1007. When the pressure reaches 1.4 MPa, at this time, the push ring 1003 breaks through the second pressure limiting slider, causing the sealing head 1004 of the push ring 1003 to lock with the sealing port 1005 of the first housing 1001, and the push block 1007 in the insertion channel of the locking control channel 13 continues to move upward. At this time, the insertion arc rod 1404 of the locking component 14 completely passes through the locking control channel 13, locking the locking ring body 6 completely on the flange. Then, according to the inserted length on the connecting rod 1006, the triggering component 15 will directly trigger the danger warning of the leakage position warning box 8 and give a warning. The grading trigger head 1502 triggers different levels according to different liquid pressures. The above is the working principle of a corrosion-resistant fluorine-lined pipeline structure for chemical engineering and its usage method.

Claims

1. A corrosion-resistant fluorine-lined pipeline structure for chemical industry, comprising a fluorine-lined pipeline (1) and an anti-leakage locking mechanism (3), characterized in that: The fluorine-lined pipe (1) is provided with a connecting pipe (2) on both sides thereof by bolts, and a leakage prevention locking mechanism (3) is provided at the flange connection between the fluorine-lined pipe (1) and the connecting pipe (2), and the leakage prevention locking mechanism (3) comprises a grading component (10), a locking control channel (13), a locking component (14) and a trigger component (15), and a locking control channel (13) is reserved above the grading component (10), and locking components (14) are provided on both sides of the locking control channel (13), and a trigger component (15) is placed above the locking control channel (13); An inner pipe (101) is arranged on the inner wall of the fluorine-lined pipe (1), and a circulating cooling chamber (16) is reserved between the fluorine-lined pipe (1) and the inner pipe (101); a threaded water-flowing baffle (102) is arranged on the outer surface of the inner pipe (101), and a water inlet pipe (17) is installed on the outer surface of the fluorine-lined pipe (1); a control valve (19) is fixedly connected to the top of the water inlet pipe (17) by bolts, and a water pipe (20) is connected to the water inlet end of the control valve (19); a temperature sensor (21) is installed on the side of the water inlet pipe (17), and a temperature sensing probe of the temperature sensor (21) is fitted with the threaded water-flowing baffle (102) of the inner pipe (101); and a water outlet pipe (18) is arranged on the side of the fluorine-lined pipe (1) away from the water inlet pipe (17).

2. A corrosion-resistant fluorine-lined pipeline structure for chemical industry according to claim 1, characterized in that: A pressure-resistant mesh (5) is welded on the inner wall surface of the inner pipe (101), and a pressure-resistant inner lining sleeve (4) is placed on the inner wall surface of the pressure-resistant mesh (5), and the pressure-resistant inner lining sleeve (4) comprises an outer edge ring (401), a mounting hole (402) and a connecting sleeve (403), and the mounting hole (402) is arranged at the edge of the outer edge ring (401), and the flange mounting hole (402) and the mounting hole (402) of the fluorine-lined pipe (1) and the pressure-resistant inner lining sleeve (4) fit each other.

3. The corrosion-resistant fluorine-lined pipeline structure for chemical industry according to claim 1, characterized in that: The anti-leakage locking mechanism (3) further comprises a locking ring body (6), an assembly limit ring (7), a leakage position warning box (8) and a fixing bolt (301), and assembly limit rings (7) are placed at both ends of the locking ring body (6), and a fixing bolt (301) is arranged on the side of the assembly limit ring (7) away from the locking ring body (6), and the locking ring body (6) and the assembly limit ring (7) form a detachable structure through the fixing bolt (301), and four groups of leakage position warning boxes (8) are arranged on the outer diameter surface of the locking ring body (6), and the four groups of leakage position warning boxes (8) divide the leakage area of ​​the locking ring body (6) into four areas.

4. A corrosion-resistant fluorine-lined pipeline structure for chemical industry according to claim 3, characterized in that: The locking ring body (6) comprises a liquid storage cavity (9), a liquid seepage chamber (11) and a nano-microcapsule (12), and four groups of liquid storage cavities (9) are placed inside the liquid seepage chamber (11), and nano-microcapsules (12) are placed between the four groups of liquid storage cavities (9), and the nano-microcapsules (12) are filled with nano-silica gel particles.

5. The corrosion-resistant fluorine-lined pipeline structure for chemical industry according to claim 1, characterized in that: The grading assembly (10) comprises a first shell (1001), a liquid inlet chamber (1002), a push ring (1003), a sealing head (1004), a sealing port (1005), a connecting rod (1006) and a pushing block (1007), and a liquid inlet chamber (1002) is reserved inside the first shell (1001), and a pushing ring (1003) is arranged above the liquid inlet chamber (1002), and two groups of sealing heads (1004) are installed above the pushing ring (1003), and a connecting rod (1006) is installed between the two groups of sealing heads (1004), and a sealing port (1005) is arranged above the sealing head (1004), and a pushing block (1007) is installed at one end of the connecting rod (1006) away from the pushing ring (1003).

6. A corrosion-resistant fluorine-lined pipeline structure for chemical industry according to claim 5, characterized in that: The grading component (10) further comprises a sealing plugging head (1008) and a liquid inlet (1009), and the liquid inlet (1009) is provided on both sides of the first shell (1001), and the sealing plugging head (1008) is installed inside the liquid inlet (1009).

7. The corrosion-resistant fluorine-lined pipeline structure for chemical industry according to claim 1, characterized in that: The locking assembly (14) comprises a fixed bracket (1401), a second shell (1402), a first spring (1403) and a plug-in arc rod (1404), and the second shell (1402) is installed on the side of the fixed bracket (1401), and the first spring (1403) is placed inside the second shell (1402), and the plug-in arc rod (1404) is arranged on the side of the first spring (1403) away from the fixed bracket (1401).

8. The corrosion-resistant fluorine-lined pipeline structure for chemical industry according to claim 1, characterized in that: The trigger assembly (15) comprises a third shell (1501), a trigger head (1502), a snap-fitting piece (1503), a second spring (1504) and a locking rod (1505), wherein the trigger head (1502) is placed inside the third shell (1501), the snap-fitting piece (1503) is installed on both sides of the trigger head (1502), the second spring (1504) is placed below the snap-fitting piece (1503), and the locking rod (1505) is placed below the second spring (1504).

9. A method for using a corrosion-resistant fluorine-lined pipeline for chemical industry, using a corrosion-resistant fluorine-lined pipeline structure for chemical industry according to any one of claims 1 to 8, characterized in that: The method of use comprises the following steps: Step 1: The pressure-resistant mesh (5) is welded inside the fluorine-lined pipe (1), and after the welding is completed, the separate pressure-resistant inner lining sleeve (4) is inserted into the inside of the fluorine-lined pipe (1), and the joints of the separate pressure-resistant inner lining sleeve (4) are hot-melt connected. Before hot-melting, the screw is inserted into the flange mounting hole (402) of the fluorine-lined pipe (1) and the mounting hole (402) of the pressure-resistant inner lining sleeve (4). After the positioning of the pressure-resistant inner lining sleeve (4) is completed, the pressure-resistant inner lining sleeve (4) is hot-melt connected to complete the connection of the pressure-resistant inner lining sleeve (4), and the mounting structure of the pressure-resistant inner lining sleeve (4) installed in the connecting pipe (2) is the same as that of the fluorine-lined pipe (1); Step 2: After the processing of the fluorine-lined pipe (1) and the connecting pipe (2) is completed, the fluorine-lined pipe (1) and the connecting pipe (2) are connected, and an anti-leakage locking mechanism (3) is installed at the connection between the fluorine-lined pipe (1) and the connecting pipe (2). First, the anti-leakage locking mechanism (3) is separated, and the locking ring body (6) and the assembly limit ring (7) are respectively passed through the corresponding fluorine-lined pipe (1) and the connecting pipe (2) flanges, and placed on the outer diameter surface of the pipe, and then the fluorine-lined pipe (1) and the connecting pipe (2) are connected by a crane. ) and place a rubber sealing ring at the flange connection between the fluorine-lined pipe (1) and the connecting pipe (2), and use bolts to fix the fluorine-lined pipe (1) and the connecting pipe (2) to complete the connection between the fluorine-lined pipe (1) and the connecting pipe (2), then sleeve the locking ring body (6) at the flange connection between the fluorine-lined pipe (1) and the connecting pipe (2), and use fixing bolts (301) to install the assembly limit rings (7) on both sides of the locking ring body (6), thereby completing the fixation of the anti-leakage locking mechanism (3); Step 3: When the chemical liquid is circulated, when the seal between the flange rings leaks, the liquid leaks from the flange where the fluorine-lined pipe (1) and the connecting pipe (2) are connected, and then the leaked liquid comes into contact with the nano-microcapsules (12) in the seepage chamber (11). The contact between the liquid and the nano-microcapsules (12) causes the wrapped surface of the nano-microcapsules (12) to be damaged, and the wrapped nano-silicone sealant is released, so that the nano-silicone sealant comes into contact with the chemical liquid and continues to expand, completely filling the seepage chamber (11); Step 4: The liquid in the flange gap is then continuously pressurized and applied to the liquid storage chamber. When the pressure is increased to 0.8 MPa, the liquid breaks through the reserved liquid inlet port set in the liquid storage chamber (9), and then the liquid flows in and enters the liquid inlet port (1009) reserved by the grading component (10). When the liquid enters the interior of the liquid inlet chamber (1002), it directly squeezes the push ring (1003), so that the push ring (1003) is pressed and moves upward, and because the first shell (1001) When the pressure reaches 1.2 MPa, the push ring (1003) drives the push block (1007) on the connecting rod (1006), so that the push block (1007) is located at the center of the plug-in channel of the locking control channel (13), and the locking assembly (14) is triggered, so that the plug-in arc rod (1404) of the locking assembly (14) is locked. ) is pushed by the first spring (1403) into the plug-in channel of the locking control channel (13) and is restricted by the push block (1007). When the pressure reaches 1.4 MPa, the push ring (1003) breaks through the second pressure limiting paddle, so that the sealing head (1004) of the push ring (1003) and the sealing opening (1005) of the first housing (1001) are locked (1505), and the push block (1007) in the plug-in channel of the locking control channel (13) is locked. 1007) continues to move upward, at which time the plug-in arc rod (1404) of the locking assembly (14) completely passes through the locking control channel (13), completely locking the locking ring body (6) on the flange (1505), and then the connecting rod (1006) will cause the trigger assembly (15) to directly trigger the danger warning of the leakage position warning box (8) according to the inserted length, and issue an early warning, and the graded trigger head (1502) triggers different levels of alarms according to the different pressures of the liquid; Step 5: When the liquid is transported along the inner pipe (101), the temperature sensing probe connected to the temperature sensor (21) detects that the temperature of the liquid transported in the inner pipe (101) is between 1°C and 260°C during the transport process. At this time, the water circulation cooling stops and maintains normal operation. At this time, the temperature sensing probe connected to the temperature sensor (21) detects that the temperature of the liquid transported in the inner pipe (101) is above 260°C. At this time, the control valve (19) is opened. At this time, the water pipe (20) transports the cooling water source into the inner part of the circulation cooling chamber (16), and makes the water source move along the circulation cooling chamber (16), and move along the threaded walkway to the end, and flows out through the water outlet pipe (18), so as to control the temperature of the inner pipe (101) in the process of receiving the liquid, so that the contact temperature between the inner pipe (101) and the liquid is always within a safe range.

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