Modular split double casing and leakage diversion monitoring system
By using a modular, split-type double-pipe design and a leakage diversion monitoring system, the problems of high construction space requirements and hidden engineering hazards have been solved, enabling safe and efficient installation and operation and maintenance in narrow areas and in the renovation of existing lines.
Patent Information
- Application Number
- CN202610816169.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-06-08
- Publication Date
- 2026-07-14
Smart Images
Figure CN122384007A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of industrial fluid transportation and environmental engineering technology, specifically to a modular split-type double-pipe and leakage diversion monitoring system. Background Technology
[0002] In industrial settings such as lithium-ion battery manufacturing, semiconductor etching, and precision chemical reactions, the media transported through pipelines often include high-risk fluids such as NMP (N-methylpyrrolidone) waste liquid and strong acid / alkali wastewater. If such media leaks due to pipeline rupture, it will not only cause serious environmental pollution and personal safety accidents but also result in economic losses of expensive materials. Therefore, relevant national environmental regulations and industry safety technical standards typically mandate the use of double-walled (double-layer protection) designs in core production areas and sensitive pipeline sections.
[0003] In a dual-pipe system, the inner pipe carries out normal transport functions, while the outer pipe serves as a second layer of physical protection. Its core function is to receive the leaked medium and guide it to a designated monitoring and drainage point when the inner pipe ruptures or leaks, thereby enabling early detection and warning of leaks and buying time for emergency response.
[0004] Currently, the closest solution on the market is the integrated double-tube system. The typical structural features of this type of system are: the outer tube is a complete circumferential tube (full circle tube), the inner tube is positioned at the center of the outer tube by a support, and the two are combined into an inseparable integral structure by pre-fitting or on-site electrofusion or thermofusion welding.
[0005] However, the aforementioned integrated double-pipe system has the following significant drawbacks in practical engineering applications: (1) High requirements for construction space and poor adaptability.
[0006] Because the existing outer pipe is a complete circumferentially closed structure, an axial insertion and removal space several times the length of the pipe section must be reserved during installation to allow the outer pipe to be inserted or removed from the end of the pipeline. In narrow factory pipe corridors, dense pipe rack areas, or when carrying out safety upgrades to existing lines, such ample axial operating space is often lacking on site, making it impossible to implement integral double-pipe systems or requiring extremely high dismantling and modification costs, which seriously restricts the promotion and application of double-pipe technology.
[0007] (2) The installation process is not visible and there are hidden dangers in the project.
[0008] Once the integral sleeve is closed, the annular space between the inner and outer pipes is completely sealed. Construction personnel cannot visually inspect whether the internal support components are installed correctly or misaligned, nor can they observe the weld quality of the outer wall of the inner pipe or whether the anti-corrosion layer is damaged. These hidden defects are difficult to detect before commissioning, creating potential safety hazards for subsequent operation. Summary of the Invention
[0009] Therefore, to address the aforementioned shortcomings, this invention provides a modular, split-type double-casing pipe and leakage monitoring system. The outer casing is designed as a semi-cylindrical structure that can be joined vertically, eliminating the need for axial insertion and removal space during pipe installation and solving construction difficulties in narrow pipe corridors or existing line renovations. Simultaneously, it enables visual installation, allowing construction personnel to complete the inner pipe connection and testing first, and then visually confirm the internal structure is correct before assembling the outer pipe, thereby eliminating potential quality hazards caused by concealed works.
[0010] On the one hand, the present invention provides a modular split sleeve, including an upper tube body and a lower tube body, which are spliced together to form a sleeve and fitted around the periphery of the conveying pipe; The upper tube and the lower tube are connected by a bolt assembly using extended lugs; Both ends of the upper and lower pipes are connecting parts. After the connecting parts of the upper and lower pipes are spliced and fastened together, they are pressed against the outer wall of the conveying pipe by clamps. The inner wall of the connecting part and the outer wall of the conveying pipe are bonded together with sealant. A sealing ring is engaged at the front of the connecting part and pressed against the outer wall of the conveying pipe.
[0011] Optionally, a sealing element is provided between the lugs of the upper tube and the lugs of the lower tube, which is tightened by a bolt assembly.
[0012] Optionally, the upper tube and the lower tube are joined by a tenon and a groove, and the tenon is bonded to the groove with sealant.
[0013] Optionally, the upper tube and / or the lower tube are constructed by splicing together multiple unit tubes, wherein the unit tubes located at the ends have connecting parts.
[0014] Optionally, adjacent unit tubes are connected by clamps after overlapping.
[0015] Optionally, one end of the non-end unit tube is a large-diameter section and the other end is a small-diameter section, wherein the small-diameter section is inserted into the large-diameter section of the adjacent unit tube and then connected by clamping. The small diameter portion has a tenon at its end, while the large diameter portion has a groove that matches the tenon. The tenon and groove, as well as the small diameter portion and the large diameter portion, are bonded together with sealant. A sealing ring, secured by a clamp, is also engaged between the large-diameter and small-diameter parts.
[0016] Optionally, the unit tubes are located at both ends, with one end having the large-diameter portion and the other end having the small-diameter portion.
[0017] Optionally, the sleeve formed after the splicing is joined has several annular support plates. The inner circle of the support plate is connected to the conveying pipe through a support plate sealing ring, while the outer circle of the support plate is fixed to the inner wall of the unit pipe of the upper pipe body and / or the lower pipe body. A drain hole is provided at the lower end of the support plate.
[0018] Optionally, a drain pipe can be connected to an external unit pipe.
[0019] On the other hand, the present invention provides a leakage diversion monitoring system based on the aforementioned modular split sleeve. The system includes a signal sensing module, a control module, and an alarm module. The sensing module acquires a leakage signal and transmits it to the control module. The control module analyzes the leakage signal, generates an alarm signal, and executes the alarm signal. The sensing module includes several acid and alkali leakage detection strips connected to the controller. The number of acid and alkali leakage detection strips is the same as the number of unit tubes. A numbered acid and alkali leakage detection strip is axially pasted on the bottom of each unit tube. The thickness of the acid / alkali leakage detection band is smaller than the diameter of the drainage hole.
[0020] The present invention has the following advantages: This invention, by designing the outer casing as a semi-cylindrical split structure (upper and lower pipe bodies) that can be joined together vertically, completely eliminates the reliance on axial insertion space for pipe installation. Construction workers can directly perform radial snap-fit installation on the outside of existing pipelines without reserving operating space several times the length of the pipe section. This effectively solves the construction difficulties in narrow factory pipe corridors, dense pipe rack areas, and existing line renovations, significantly reducing on-site demolition and modification costs and construction difficulty.
[0021] The leakage monitoring system axially affixes a uniquely numbered acid / alkali leakage detection tape to the bottom of each unit pipe. The tape's thickness is less than the drain hole diameter to ensure full contact with the leaking liquid. When leakage occurs, the control module accurately determines the specific unit pipe number based on feedback signals from the sensor module and triggers an alarm, achieving precise unit-level location of the leak. This design avoids the blind inspection of the entire pipeline in traditional systems, allowing maintenance personnel to directly and quickly replace or repair faulty unit pipes, significantly reducing subsequent maintenance costs and downtime. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of a modular, split-type sleeve. Figure 2 This is a schematic diagram of a modular, split-type sleeve (composed of unit tubes); Figure 3 This is a schematic diagram showing the connection between the upper and lower pipe bodies; Figure 4 yes Figure 2 A magnified view of N in the diagram; Figure 5 It is in the middle Figure 2 A magnified view of part M in the diagram; Figure 6 yes Figure 1 Schematic diagram of the cross section of AA; In the diagram: 110, upper pipe body; 111, unit pipe; 120, lower pipe body; 130, conveying pipe; 140, support plate; 141, support plate sealing ring; 142, drain hole; 150, lug; 160, seal; 200, clamp; 300, sealing ring; 400, sealant; 500, gasket; 600, sealing ring; 700, tenon; 800, groove; 900, bolt assembly. Detailed Implementation
[0023] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.
[0024] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.
[0025] As described in the background section, the integrated double-pipe system has the following significant drawbacks in practical engineering applications: (1) High requirements for construction space and poor adaptability.
[0026] Because the existing outer pipe is a complete circumferentially closed structure, an axial insertion and removal space several times the length of the pipe section must be reserved during installation to allow the outer pipe to be inserted or removed from the end of the pipeline. In narrow factory pipe corridors, dense pipe rack areas, or when carrying out safety upgrades to existing lines, such ample axial operating space is often lacking on site, making it impossible to implement integral double-pipe systems or requiring extremely high dismantling and modification costs, which seriously restricts the promotion and application of double-pipe technology.
[0027] (2) The installation process is not visible and there are hidden dangers in the project.
[0028] Once the integral sleeve is closed, the annular space between the inner and outer pipes is completely sealed. Construction personnel cannot visually inspect whether the internal support components are installed correctly or misaligned, nor can they observe the weld quality of the outer wall of the inner pipe or whether the anti-corrosion layer is damaged. These hidden defects are difficult to detect before commissioning, creating potential safety hazards for subsequent operation.
[0029] Based on the above problems, this embodiment provides a modular split sleeve, including an upper tube 110 and a lower tube 120. The upper tube 110 and the lower tube 120 are spliced together to form a sleeve, which is then fitted around the periphery of the conveying pipe. The upper tube and the lower tube are connected by bolt assembly 900 via extended lugs 150. like Figure 5 As shown, both ends of the upper and lower pipes are connecting parts. After the connecting parts of the upper and lower pipes are spliced together, they are pressed against the outer wall of the conveying pipe 130 by a clamp 200. The inner wall of the connecting part and the outer wall of the conveying pipe are bonded together with sealant 400. A sealing ring 300 is engaged at the front of the connecting part and pressed against the outer wall of the conveying pipe. A washer 500 is also provided between the clamp 200 and the connecting plate. like Figure 3 As shown, a sealing element 160 is provided between the lugs of the upper tube and the lugs of the lower tube, and is tightened by a bolt assembly 900. The upper tube and the lower tube are engaged by a tenon 700 and a groove 800, and the tenon is bonded to the groove by a sealant 400.
[0030] The aforementioned technical features design the outer casing as a semi-cylindrical structure that can be joined vertically, eliminating the reliance on axial insertion space for pipe installation and solving construction challenges in narrow pipe corridors or existing line renovations. Furthermore, the use of a split-type interlocking structure allows construction personnel to independently complete the connection, welding, and pressure testing of the inner pipe. Only after visually confirming that the internal supports are free of misalignment, the inner pipe welds are free of defects, and the anti-corrosion layer is undamaged, can the outer pipe be assembled. The entire installation process is open and visible, fundamentally eliminating the hidden quality risks associated with traditional integral casings where the internal condition cannot be inspected after assembly.
[0031] At the horizontal joint surface between the upper and lower pipe bodies, multiple sealing barriers are established on the horizontal and longitudinal interfaces by tightening the seal with lug bolts, the mating of the tenon and groove, and the tiered combination of sealant (MS polymer sealant) and sealing ring (fluororubber O-ring).
[0032] Furthermore, the upper pipe body and / or the lower pipe body are constructed by splicing together multiple unit pipes 111, wherein the unit pipes located at the ends have connecting portions. Adjacent unit pipes are connected by clamps 200 after overlapping.
[0033] like Figure 4As shown, one end of the non-end unit tube is a large-diameter section and the other end is a small-diameter section. The small-diameter section is inserted into the large-diameter section of the adjacent unit tube and then connected by clamping 200. The small diameter portion has a tenon 700 at its end, while the large diameter portion has a groove 800 that matches the tenon. The tenon and groove, as well as the small diameter portion and the large diameter portion, are bonded together with sealant 400. A sealing ring 600, secured by a clamp, is also engaged between the mating large-diameter and small-diameter portions.
[0034] In the unit tubes located at both ends, one end of the unit tube has the large diameter portion, and the other end of the unit tube has the small diameter portion.
[0035] Among the aforementioned technical features, the upper and / or lower pipe bodies can be constructed from multiple standardized unit pipes, allowing for flexible assembly based on the actual length requirements of the construction site. Adjacent unit pipes are quickly connected via clamps, utilizing grooves and tenons for precise positioning and reducing the risk of misalignment, while also being compatible with various connection processes such as electrofusion and bonding. This modular design makes the unit pipes standard finished components that can be mass-produced, significantly improving engineering versatility, sourcing convenience, and on-site construction efficiency. Simultaneously, the longitudinal overlap of the unit pipes further strengthens the longitudinal seal through nested fits between the large and small diameter sections, sealant bonding, and clamp-fastened sealing rings. This multi-seal system significantly enhances the system's reliability in protecting against highly corrosive, toxic, or high-value, high-risk media. Through the combination of sealing rings, tenons and grooves, and a tiered combination of sealant (MS polymer sealant) and sealing rings (fluororubber O-rings), multiple sealing barriers are established at the horizontal and longitudinal interfaces.
[0036] Meanwhile, external clamps (stainless steel clamps) are used in conjunction with rubber gaskets to fasten the longitudinal overlaps and end connections of the unit pipes. The clamps provide continuous radial prestress, which not only strengthens the integrity of the split structure, but also effectively absorbs the stress caused by foundation settlement, thermal expansion and contraction and mechanical vibration, prevents the joints from cracking due to stress concentration, and significantly improves the seismic performance and long-term operational reliability of the system.
[0037] Furthermore, such as Figure 1 , Figure 2 and Figure 6 The sleeve formed after the parts are joined together has several annular support plates 140. The inner circle of the support plate is connected to the conveying pipe through a support plate sealing ring 141, while the outer circle of the support plate is fixed to the inner wall of the unit pipe of the upper pipe body and / or the lower pipe body. A drain hole 142 is provided at the lower end of the support plate. A drain pipe is externally connected to one of the unit pipes.
[0038] Among the aforementioned technical features, the annular support plate installed inside the casing provides support for the delivery pipe, and a drain hole is opened at the lower end of the support plate (at the 6 o'clock position). Together with the drain pipe at the bottom of the unit pipe, a hydrophobic and diverting channel is constructed that runs through the entire pipeline. This design allows the leaking liquid to pass through the drain holes of each level of the support plate sequentially and flow unimpeded to the drainage point, eliminating the circumferential dead zone of liquid accumulation caused by traditional fully enclosed support rings.
[0039] In another embodiment, a leakage diversion monitoring system is also provided, based on the aforementioned modular split sleeve. The system includes a signal sensing module, a control module, and an alarm module. The sensing module acquires a leakage signal and transmits it to the control module. The control module analyzes the leakage signal, generates an alarm signal, and executes the alarm signal. The sensing module includes several acid and alkali leakage detection strips connected to the controller. The number of acid and alkali leakage detection strips is the same as the number of unit tubes. A numbered acid and alkali leakage detection strip is axially pasted on the bottom of each unit tube. The thickness of the acid / alkali leakage detection band is smaller than the diameter of the drainage hole.
[0040] The leakage monitoring system axially affixes a uniquely numbered acid / alkali leakage detection tape to the bottom of each unit pipe. The tape's thickness is less than the drain hole diameter to ensure full contact with the leaking liquid. When leakage occurs, the control module accurately determines the specific unit pipe number based on feedback signals from the sensor module and triggers an alarm, achieving precise unit-level location of the leak. This design avoids the blind inspection of the entire pipeline in traditional systems, allowing maintenance personnel to directly and quickly replace or repair faulty unit pipes, significantly reducing subsequent maintenance costs and downtime.
[0041] The detection method based on the above-mentioned leakage diversion monitoring system is as follows: Step S1: Baseline adaptive establishment; After the system is put into operation, it will enter a period of time. T 0 A learning period of (e.g., 7 days). The control module operates on a cyclical basis. Δt (e.g., 5 seconds) Scan the acid / alkali leakage detection strip at the bottom of each unit tube and record its resistance value under dry steady-state conditions. R i,base ( i (Unit tube number). After the learning period, the warning threshold will be automatically set. R i,warn = k 1 ⋅ R i, base :(like k 1 =0.80), alarm threshold: Ri,alarm = k 2 ⋅ R i,base (like k 2 =0.60); The system automatically recalibrates the baseline monthly during maintenance windows when no leaks are manually confirmed, in order to eliminate the effects of slow drift in ambient humidity.
[0042] Step S2: Dual threshold timing confirmation (core of false alarm prevention); The control module continuously compares the current detection values. R i ( t ) and threshold: like R i ( t )> R i,warn If the condition is determined to be normal, the observation timer for that unit tube is reset to zero.
[0043] like R i,warn ≥ R i ( t )> R i,alarm : Triggering an early warning state. Starting the observation timer for this unit tube. τ i .like τ i Set duration T hold If the timeout period does not exceed 5 minutes and the resistance value rises back above the warning threshold, it is determined to be condensation, cleaning residue, or transient interference; only a log is recorded, and no alarm is output. τ i If the timeout period expires or the resistance value decreases further, the alarm status will be activated.
[0044] like R i ( t )≤ R i,alarm : Directly trigger the alarm state and immediately proceed to step S3.
[0045] Step S3: Verification of spatiotemporal correlation between upstream and downstream (precise location of the core). When unit tube i When entering alarm mode, the control module synchronously reads its upstream unit tube within a short scan window (e.g., within 1 second). i -1 and downstream unit tubes i The detection status is +1, and the timestamp of the first trigger of the warning for each tube is retrieved.t first Spatial association determination shall be performed according to the rules in Table 1 below.
[0046] Table 1: Rule Table; ; Step S4: Leakage rate classification (severity assessment); For the unit transistor in alarm mode, calculate its rate of resistance change: ; Level 1 (drip): | v i |< v slow The resistance is slowly decreasing. A yellow warning is issued, and it is recommended to include this in the planned maintenance schedule.
[0047] Level 2 (leakage): v slow ≤| v i |< v fast An orange alert has been issued, and on-site verification is recommended within 48 hours.
[0048] Level 3 (Fracture): | v i |≥ v fast If the resistance value approaches zero within a very short time, a red emergency alarm will be triggered, and the linkage control module will immediately trigger a shutdown or close the upstream and downstream valves.
[0049] Step S5: Intelligent alarm output and maintenance closed loop.
[0050] The alarm signal is sent from the control module to the alarm module for execution. The signal content includes at least: the leakage unit pipe number (or the suspected source number after correlation verification); the leakage level (Level 1 / Level 2 / Level 3); the correlation verification conclusion (local / upstream / downstream / entire line); and the recommended handling measures.
[0051] After maintenance personnel complete the repair, the system manually confirms the reset, and the control module records the historical leakage frequency and level of the unit pipe for subsequent predictive maintenance decisions.
[0052] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A modular split-type sleeve, characterized in that: It includes an upper pipe and a lower pipe, which are joined together to form a sleeve and fitted around the outside of the conveying pipe. The upper and lower tubes are connected by bolt assemblies using extended lugs; Both ends of the upper and lower pipes are connecting parts. After the connecting parts of the upper and lower pipes are spliced and fastened together, they are pressed against the outer wall of the conveying pipe by clamps. The inner wall of the connecting part and the outer wall of the conveying pipe are bonded together with sealant. A sealing ring is engaged at the front of the connecting part and pressed against the outer wall of the conveying pipe.
2. The modular split-type sleeve according to claim 1, characterized in that: A sealing element, which is tightened by a bolt assembly, is provided between the lugs of the upper tube and the lugs of the lower tube.
3. The modular split-type sleeve according to claim 1, characterized in that: The upper and lower tubes are joined by a tenon and a groove, with the tenon bonded to the groove using sealant.
4. A modular split-type sleeve according to claims 1-3, characterized in that: The upper tube and / or the lower tube are constructed by splicing together multiple unit tubes, wherein the unit tubes located at the ends have connecting parts.
5. A modular split-type sleeve according to claim 4, characterized in that: The adjacent unit tubes are connected by clamps after overlapping.
6. The modular split-type sleeve according to claim 5, characterized in that: The non-end unit tube has a large diameter section at one end and a small diameter section at the other end. The small diameter section is inserted into the large diameter section of the adjacent unit tube and then connected by clamping. The small diameter portion has a tenon at its end, while the large diameter portion has a groove that matches the tenon. The tenon and groove, as well as the small diameter portion and the large diameter portion, are bonded together with sealant. A sealing ring, secured by a clamp, is also engaged between the large-diameter and small-diameter parts.
7. The modular split-type sleeve according to claim 7, characterized in that: The unit tubes are located at both ends, with one end having the large-diameter portion and the other end having the small-diameter portion.
8. The modular split-type sleeve according to claim 4, characterized in that: The sleeve formed after splicing has several annular support plates. The inner circle of the support plate is connected to the conveying pipe through the support plate sealing ring, while the outer circle of the support plate is fixed to the inner wall of the unit pipe of the upper pipe body and / or the lower pipe body. There is a drain hole at the lower end of the support plate.
9. A modular split-type sleeve according to claim 4, characterized in that: An external drain pipe is connected to one of the unit pipes.
10. A leakage diversion monitoring system, characterized in that: Based on the modular split bushing as described in any one of claims 1-9, the system includes a signal sensing module, a control module, and an alarm module. The sensing module acquires a leakage signal and transmits it to the control module. The control module analyzes the leakage signal, generates an alarm signal, and executes the alarm signal. The sensing module includes several acid and alkali leakage detection strips connected to the controller. The number of acid and alkali leakage detection strips is the same as the number of unit tubes. A numbered acid and alkali leakage detection strip is axially pasted on the bottom of each unit tube. The thickness of the acid / alkali leakage detection band is smaller than the diameter of the drainage hole.